KR102493238B1 - Scroll compressor - Google Patents

Abstract

A scroll compressor according to the present invention includes a suction guide provided with a suction passage to guide refrigerant sucked into a low-pressure part of a casing to a compression chamber, and the suction guide forms one end of the suction passage and opens toward the low-pressure part. An inlet part and a passage outlet part forming the other end of the suction passage and opening toward the suction hole, wherein the passage inlet part may open in a direction crossing the outlet end of the refrigerant suction pipe. Through this, overheating of the refrigerant sucked into the compression chamber is suppressed to increase the refrigerant intake amount, while overheating of the drive motor is suppressed, thereby improving compressor efficiency and expanding the operating range of the compressor.

Description

Scroll Compressor {SCROLL COMPRESSOR}

The present invention relates to a scroll compressor, and more particularly to a suction guide provided inside a casing.

In the scroll compressor, the orbiting scroll and the non-orbiting scroll are interlocked and coupled, and the orbiting scroll makes a orbital motion with respect to the non-orbiting scroll to form a pair of compression chambers.

The compression chamber consists of a suction pressure chamber formed on the outside and into which suction refrigerant flows in, an intermediate pressure chamber in which the refrigerant is compressed as the volume continuously decreases toward the center of the suction pressure chamber, and a discharge pressure chamber leading to the center of the intermediate pressure chamber and discharging the compressed refrigerant. Normally, the suction pressure chamber communicates with the suction port penetrating the side of the non-orbiting scroll, the intermediate pressure chamber is sealed, and the discharge pressure chamber is formed at the discharge port penetrating the head plate of the non-orbiting scroll.

Scroll compressors can be classified into high-pressure type scroll compressors and low-pressure type scroll compressors according to a path through which refrigerant is sucked. In the high-pressure scroll compressor, the refrigerant suction pipe is directly connected to the suction pressure chamber so that the refrigerant is directly guided to the suction pressure chamber without passing through the inner space of the casing. In the low-pressure scroll compressor, the inner space of the casing is separated into a low-pressure part and a high-pressure part by a high-low-pressure separator or a discharge plenum through which the refrigerant outlet is in communication, and the refrigerant suction pipe is communicated to the low-pressure part so that the low-temperature suction refrigerant is discharged. After passing through the inner space of the casing, it is guided to the suction pressure chamber.

In the low-pressure scroll compressor disclosed in Patent Document 1 (Korean Patent Publication No. 10-2015-0126499), a part of the suction refrigerant passes through the low-pressure part to cool the drive motor installed in the low-pressure part, so the compressor efficiency can be improved. However, in the low-pressure scroll compressor, as the suction refrigerant comes in contact with the drive motor and is sucked into the compression chamber in a state where its temperature rises, the specific volume in the suction pressure chamber increases, which may cause suction loss.

In addition, in the low-pressure scroll compressor, the suction refrigerant that is in contact with the drive motor as well as the suction refrigerant that is not in contact with the drive motor is sucked into the suction pressure chamber by contacting the high-low pressure separator (or discharge plenum) exposed to the high-pressure part to heat it. Or, while being heated by radiant heat transmitted through the high and low pressure separator (or discharge plenum), the specific volume may increase, resulting in suction loss.

Accordingly, conventionally, a low-pressure type scroll compressor provided with a suction conduit in the low-pressure part of the case has been proposed as in Patent Document 2 (US Patent Publication No. 2016/0298885 A1). The suction conduit in Patent Document 2 is provided between the refrigerant suction pipe and the suction port and guides the refrigerant passing through the refrigerant suction pipe to the compression chamber. However, the inlet of the suction conduit is spaced apart from the refrigerant suction pipe and allows some of the refrigerant passing through the refrigerant suction pipe to flow into the low-pressure part of the casing before being sucked into the compression chamber.

However, in Patent Document 2 as described above, most of the refrigerant passing through the refrigerant suction pipe is sucked into the compression chamber through the suction pipe as the inlet of the suction pipe is formed to face the outlet end of the refrigerant suction pipe. As a result, the amount of refrigerant flowing into the low-pressure part of the casing is greatly reduced or insignificant, and the cooling effect of the driving motor may be reduced. This may narrow an operating range due to overheating of the driving motor.

Korean Patent Publication No. 10-2015-0126499 (published date: 2015.11.12.) US Patent Publication US2016/0298885 A1 (published date: 2016.10.13.)

An object of the present invention is to provide a scroll compressor capable of appropriately cooling a drive motor while lowering the specific volume of a suction refrigerant in a low pressure type.

Furthermore, an object of the present invention is to provide a scroll compressor in which suction refrigerant passing through a refrigerant suction pipe can be appropriately distributed toward the low-pressure portion and the compression portion of the casing.

Furthermore, an object of the present invention is to provide a scroll compressor capable of suppressing the refrigerant sucked into the compression unit from being heated by the high and low pressure separator.

In order to achieve the object of the present invention, a high and low pressure separator may be provided to separate the inner space of the casing into a lower space and an upper space. A refrigerant suction pipe communicating with the lower space of the casing may be provided. A refrigerant discharge pipe communicating with an upper space of the casing may be provided. A compression unit disposed so that a suction pressure chamber is located above the refrigerant suction pipe may be provided. A suction guide positioned between the outlet of the refrigerant suction pipe and the suction pressure chamber of the compression unit may be provided, and the suction guide may be coupled to the casing or the compression unit facing the casing. Through this, the refrigerant flowing into the low pressure part of the casing through the refrigerant suction pipe is distributed by the suction guide, and part of it is directly sucked into the compression chamber avoiding the high and low pressure separator, while the other part is guided toward the drive motor to cool the drive motor. can Through this, overheating of the refrigerant sucked into the compression chamber is suppressed to increase the refrigerant intake amount, while overheating of the drive motor is suppressed, thereby improving compressor efficiency and expanding the operating range of the compressor.

For example, the suction guide is opened downward and may be opened toward the suction pressure chamber. Through this, the refrigerant flowing into the low-pressure part of the casing through the refrigerant suction pipe is distributed by the suction guide, and part of it is directly sucked into the compression chamber avoiding the high-low pressure separator, while the other part is guided toward the drive motor to cool the drive motor. can

For example, the suction guide may be formed in a blocked shape except for a radial side surface facing the suction pressure chamber and an upper surface in the other radial direction. Through this, it is possible to block radiant heat transmitted through the high and low pressure separator.

Specifically, the scroll compressor according to the present embodiment may include a casing, a high and low pressure separator, a refrigerant suction pipe, a refrigerant discharge pipe, a driving motor, an orbiting scroll, a non-orbiting scroll, and a suction guide. The casing may have a sealed inner space. The fixed pressure separation plate may divide the inner space of the casing into a low pressure part and a high pressure part. The refrigerant suction pipe may pass through the casing and communicate with the low pressure unit. The refrigerant discharge pipe may pass through the casing and communicate with the high-pressure unit. The driving motor may be installed inside the low pressure unit. The orbiting scroll may be coupled to the driving motor through a rotation shaft to perform a orbital motion. The non-orbiting scroll is engaged with the orbiting scroll to form a compression chamber, and a suction port may be formed through an outer circumferential surface so as to communicate with the compression chamber. The suction guide may be provided with a suction passage to guide the refrigerant sucked into the low pressure unit to the compression chamber. The suction guide may include a passage inlet part forming one end of the suction passage and opening toward the low pressure part, and a passage outlet part forming the other end of the suction passage and opening toward the suction hole. The passage inlet may open in a direction crossing the outlet end of the refrigerant suction pipe. Through this, the refrigerant flowing into the low pressure part of the casing through the refrigerant suction pipe is distributed by the suction guide, and part of it is directly sucked into the compression chamber avoiding the high and low pressure separator, while the other part is guided toward the drive motor to cool the drive motor. can

For example, the outlet end of the refrigerant suction pipe may be opened in a radial direction, and the passage inlet of the suction guide may be opened in an axial direction. Through this, the refrigerant flowing into the low-pressure part of the casing can be appropriately distributed toward the compression chamber and the drive motor by the suction guide.

For example, in the suction guide, at least a portion of the passage inlet may overlap the outlet end of the refrigerant suction pipe in the circumferential direction. The passage inlet may be located on the opposite side of the drive motor based on the outlet end of the refrigerant suction pipe. Through this, the refrigerant sucked into the low-pressure part of the casing can move toward the drive motor as well as the compression chamber, so that overheating of the drive motor can be suppressed while increasing the amount of refrigerant absorbed into the compression chamber.

For example, the suction guide may be formed in a direction in which the passage inlet portion and the passage outlet portion intersect. Through this, the passage connection portion may be positioned in a direction crossing the refrigerant suction pipe.

As another example, the passage inlet may be opened in a direction toward the driving motor, and the passage outlet may be opened in a direction toward an outer circumferential surface of the non-orbiting scroll.

For example, the suction guide may include a first side wall portion, a second side wall portion, an outer wall portion, an inner wall portion, an upper wall portion, and a lower wall portion. The first sidewall portion and the second sidewall portion may be provided on both sides of the suction port in a circumferential direction, respectively. The outer wall portion may connect an outer end of the first side wall portion and an outer end of the second side wall portion. The inner wall portion may connect an inner end of the first side wall portion and an inner end of the second side wall portion. The upper wall portion may connect the first side wall portion, the second side wall portion, and an upper end of the outer wall portion. The lower wall portion may connect the first side wall portion, the second side wall portion, and a lower end of the outer wall portion. The passage inlet portion may be formed by opening at least a portion of the lower wall portion, and the passage outlet portion may be formed by opening at least a portion of the inner wall portion. Through this, it is possible to secure the area of the passage inlet while the passage inlet is formed in a direction crossing the refrigerant suction pipe.

As another example, a stepped portion may be formed on an outer circumferential surface of the non-orbiting scroll. A fixing protrusion extending in a circumferential direction to be supported on a stepped portion of the non-orbiting scroll may be provided on at least one of the first sidewall portion and the second sidewall portion. Through this, it is possible to easily and stably fix the suction guide to the non-orbiting scroll.

As another example, a suction extension portion extending toward the driving motor from the first sidewall portion and the second sidewall portion may be further provided. At least a portion of the suction extension portion may overlap the outlet end of the refrigerant suction pipe in axial and radial directions. Through this, it is possible to increase the refrigerant intake into the compression chamber.

As another example, in the suction extension part, a second distance from an upper end in contact with the passage inlet to an inner circumferential surface of the casing may be formed larger than a first distance from a lower end facing the driving motor to an inner circumferential surface of the casing. there is. Through this, the suction refrigerant can be smoothly introduced into the compression chamber.

As another example, the suction extension portion may be inclined so as to gradually move away from the inner circumferential surface of the casing from a lower end facing the drive motor to an upper end in contact with the passage inlet. Through this, the suction refrigerant can more smoothly flow into the compression chamber.

As another example, the thickness of the upper wall portion may be formed thicker than the thickness of other portions except for the upper wall portion. Through this, it is possible to more effectively block radiant heat from the high and low pressure separator.

As another example, a suction hole forming a part of the passage inlet portion may be formed in one of the first side wall portion and the second side wall portion by at least a portion of which is opened. Through this, the passage inlet is formed on the side as well, so that the refrigerant can be smoothly sucked into the compression chamber.

As another example, the outer wall portion may be formed in a curved surface so that the outer circumferential surface adheres to the inner circumferential surface of the casing. Through this, it is possible to minimize the gap between the casing and the suction guide to suppress the refrigerant heading toward the high and low pressure separator avoiding the suction guide.

As another example, a main frame supporting the orbiting scroll may be further provided between the driving motor and the non-orbiting scroll. In the non-orbiting scroll, a plurality of guide protrusions supported by the main frame may be formed at predetermined intervals in a circumferential direction. A suction guide groove recessed from an outer circumferential surface toward an inner circumferential surface by a predetermined depth may be formed on any one of the plurality of guide protrusions. The suction guide may be accommodated between both circumferential inner surfaces forming the suction guide groove. Through this, it is possible to stably support the suction guide and at the same time block the gap between the non-orbiting scroll and the suction guide to suppress the refrigerant heading toward the high and low pressure separator avoiding the suction guide.

As another example, the outer wall portion may further include a sealing extension portion extending in a circumferential direction from an outer surface of the first side wall portion and an outer surface of the second side wall portion. Through this, it is possible to block the gap between the casing and the non-orbiting scroll to suppress the refrigerant heading toward the high and low pressure separator avoiding the suction guide.

As another example, the suction guide may be formed of a material having a lower heat transfer coefficient than that of the non-orbiting scroll. Through this, it is possible to suppress the heating of the refrigerant by radiant heat transmitted through the high and low pressure separator by increasing the insulation effect of the suction guide.

In the scroll compressor according to the present embodiment, a suction guide having a suction passage is provided to guide the refrigerant sucked into the low pressure part to the compression chamber, and the passage inlet of the suction guide may be opened in a direction crossing the outlet end of the refrigerant suction pipe. there is. Through this, the refrigerant flowing into the low pressure part of the casing through the refrigerant suction pipe is distributed by the suction guide, and part of it is directly sucked into the compression chamber avoiding the high and low pressure separator, while the other part is guided toward the drive motor to cool the drive motor. can

In addition, in the scroll compressor according to the present embodiment, the outlet end of the refrigerant suction pipe may be opened in a radial direction, and the passage inlet of the suction guide may be opened in an axial direction. Through this, the refrigerant flowing into the low-pressure part of the casing can be appropriately distributed toward the compression chamber and the drive motor by the suction guide.

Further, in the scroll compressor according to the present embodiment, the passage inlet of the suction guide may be formed by opening at least a portion of the lower wall portion, and the passage outlet of the suction guide may be formed by opening at least a portion of the inner wall portion. Through this, it is possible to secure the area of the passage inlet while the passage inlet is formed in a direction crossing the refrigerant suction pipe.

In addition, in the scroll compressor according to the present embodiment, at least one of the first sidewall and the second sidewall may be provided with a fixing protrusion that extends in the circumferential direction and is supported on the stepped portion of the non-orbiting scroll. Through this, it is possible to easily and stably fix the suction guide to the non-orbiting scroll.

In addition, in the scroll compressor according to the present embodiment, the suction extension portion extending toward the drive motor from the first side wall portion and the second side wall portion may overlap the outlet end of the refrigerant suction pipe in the axial and radial directions. Through this, it is possible to increase the refrigerant intake into the compression chamber.

In addition, in the scroll compressor according to the present embodiment, the suction extension portion may be formed to be inclined so that the inner circumferential surface of the casing is gradually distant from the lower end to the upper end. Through this, the suction refrigerant can more smoothly flow into the compression chamber.

Further, in the scroll compressor according to the present embodiment, the thickness of the upper wall portion may be thicker than that of other portions except for the upper wall portion. Through this, it is possible to more effectively block radiant heat from the high and low pressure separator.

In addition, in the scroll compressor according to the present embodiment, a suction hole forming a part of the passage inlet portion may be formed in one of the first side wall portion and the second side wall portion, at least partially of which is opened. Through this, the passage inlet is formed on the side as well, so that the refrigerant can be smoothly sucked into the compression chamber.

In addition, the scroll compressor according to the present embodiment may be formed in a curved surface so that the outer circumferential surface of the outer wall unit adheres to the inner circumferential surface of the casing. Through this, it is possible to minimize the gap between the casing and the suction guide to suppress the refrigerant heading toward the high and low pressure separator avoiding the suction guide.

In addition, in the scroll compressor according to the present embodiment, the suction guide may be formed of a material having a lower heat transfer coefficient than that of the non-orbiting scroll. Through this, it is possible to suppress the heating of the refrigerant by radiant heat transmitted through the high and low pressure separator by increasing the insulation effect of the suction guide.

1 is a longitudinal cross-sectional view showing the inside of a scroll compressor according to this embodiment;
Figure 2 is a perspective view showing a partially broken scroll compressor according to Figure 1;
Figure 3 is a perspective view showing a part of the compression unit in Figure 2;
Figure 4 is a perspective view showing the suction guide according to the present embodiment separated;
Figure 5 is a perspective view showing the suction guide according to Figure 4 from the inside;
Figure 6 is a perspective view showing the suction guide according to Figure 5 from the outside;
7 is a plan view showing a state in which the suction guide according to the present embodiment is assembled;
8 is a sectional view "IV-IV" of FIG. 7;
Figure 9 is a perspective view showing another embodiment of the suction guide according to Figure 1 by breaking it;
10 is a cross-sectional view showing a state in which the suction guide of FIG. 9 is coupled;
Figure 11 is a perspective view showing another embodiment of the suction guide according to Figure 1;
12 is a plan view showing a state in which the suction guide of FIG. 11 is assembled;
13 is a perspective view showing another embodiment of the suction guide according to FIG. 1;
14 is a cross-sectional view showing a state in which the suction guide of FIG. 13 is assembled;
Figure 15 is a perspective view showing another embodiment of the suction guide according to Figure 1;

Hereinafter, the scroll compressor according to this embodiment will be described in detail based on an embodiment shown in the accompanying drawings. As described above, the scroll compressor can be divided into a high-pressure type scroll compressor and a low-pressure type scroll compressor according to the path through which the refrigerant is sucked. The refrigerant suction pipe may be separated into a high pressure unit and a low pressure unit in communication with the low pressure unit. Hereinafter, a low pressure scroll compressor equipped with a high and low pressure separator will be described as an example.

In addition, scroll compressors can be divided into vertical scroll compressors in which a rotational axis is disposed perpendicular to the ground and horizontal scroll compressors in which a rotational axis is disposed parallel to the ground. Hereinafter, a vertical scroll compressor will be described as an example. Therefore, in the following, the upper side may be defined as the side opposite to the ground, and the lower side may be defined as the side facing the ground.

1 is a longitudinal cross-sectional view showing the inside of a scroll compressor according to this embodiment, FIG. 2 is a perspective view showing a part of the scroll compressor according to FIG. 1 broken, and FIG. 3 is a perspective view showing a part of the compression unit in FIG.

1 and 2, in the scroll compressor according to this embodiment, the drive motor 120 is installed in the lower half of the casing 110, and the main frame 130 is installed on the upper side of the drive motor 120, the turning scroll 140, the non-orbiting scroll 150, and the back pressure chamber assembly 160 are sequentially installed. The normal driving motor 120 constitutes a transmission part, and the main frame 130, the orbiting scroll 140, the non-orbiting scroll 150, and the back pressure chamber assembly 160 constitute a compression part. The transmission part is coupled to one end of the rotation shaft 125, and the compression unit is coupled to the other end of the rotation shaft 125. Accordingly, the compression unit is connected to the transmission unit by the rotating shaft 125 and operated by the rotational force of the transmission unit.

The casing 110 may include a cylindrical shell 111 , an upper cap 112 , and a lower cap 113 .

The cylindrical shell 111 has a cylindrical shape with both upper and lower ends open, and the above-described driving motor 120 and the main frame 130 are inserted into and fixed to the inner circumferential surface. A terminal bracket (not shown) is coupled to the upper half of the cylindrical shell 111, and a terminal (not shown) for transmitting external power to the driving motor 120 is coupled through the terminal bracket. In addition, a refrigerant suction pipe 117 to be described later penetrates and is coupled to the upper half of the cylindrical shell 111, for example, the upper side of the drive motor 120.

The upper cap 112 is coupled to cover the upper end of the opening of the cylindrical shell 111, and the lower cap 113 is coupled to cover the lower end of the opening of the cylindrical shell 111. Between the cylindrical shell 111 and the upper cap 112, an edge of a high and low pressure separator 115, which will be described later, is inserted and welded together to the cylindrical shell 111 and the upper cap 112, and the cylindrical shell 111 An edge of a support bracket 116 to be described later may be inserted between the and the lower cap 113 and welded to the cylindrical shell 111 and the lower cap 113 together. Accordingly, the inner space of the casing 110 is sealed.

As described above, the rim of the high and low pressure separator 115 is welded to the casing 110, and the central portion of the high and low pressure separator 115 is bent to protrude toward the upper cap 112 to form a back pressure chamber assembly (to be described later) 160) is disposed on the upper side. The refrigerant suction pipe 117 communicates with the lower side of the high-low pressure separator 115 and the refrigerant discharge pipe 118 communicates with the upper side. Accordingly, a low pressure part 110a forming a suction space is formed on the lower side of the high and low pressure separator 115, and a high pressure part 110b forming a discharge space is formed on the upper side.

In addition, a through hole 115a is formed in the center of the high and low pressure separator 115, and a sealing plate 1151 to which a floating plate 165 to be described later is detachable is inserted into and coupled to the through hole 115a. Accordingly, the low pressure part 110a and the high pressure part 110b are blocked or communicated by attaching and detaching the floating plate 165 and the sealing plate 1151.

The sealing plate 1151 is formed in an annular shape. For example, a high and low pressure communication hole 1151a is formed at the center of the sealing plate 1151 to communicate the low pressure portion 110a and the high pressure portion 110b. The floating plate 165 is detachable along the circumference of the high and low pressure communication hole 1151a. Accordingly, the floating plate 165 is moved up and down in the axial direction according to the back pressure force, and is attached to and detached from the circumference of the high and low pressure communication hole 1151a of the sealing plate 1151, and in this process, the low pressure part 110a and the high pressure part 110b The gap is sealed or communicated.

In addition, the lower cap 113 forms an oil storage space 110c together with the lower half of the cylindrical shell 111 constituting the low pressure portion 110a. In other words, the oil storage space 110c is formed in the lower half of the low pressure part 110a, and the oil storage space 110c forms a part of the low pressure part 110a.

Next, the drive motor will be described.

Referring to FIG. 1 , a drive motor 120 according to the present embodiment is installed in the lower half of the low pressure part 110a and includes a stator 121 and a rotor 122 . The stator 121 is fixed to the inner wall surface of the cylindrical shell 111 by hot press-fitting, and the rotor 122 is rotatably provided inside the stator 121 .

The stator 121 includes a stator core 1211 and a stator coil 1212 .

The stator core 1211 is formed in a cylindrical shape and fixed to the inner circumferential surface of the cylindrical shell 111 by hot press fitting. The stator coil 121a is wound around the stator core 1211 and electrically connected to an external power source through a terminal (not shown) coupled through the casing 110 .

The rotor 122 includes a rotor core 1221 and permanent magnets 1222.

The rotor core 1221 is formed in a cylindrical shape and is rotatably inserted into the stator core 1211 at intervals equal to a preset air gap. The permanent magnets 1222 are embedded in the rotor core 1222 at predetermined intervals along the circumferential direction.

In addition, a rotating shaft 125 is coupled to the center of the rotor 122. The upper end of the rotating shaft 125 is rotatably inserted into the main frame 130 to be described later and supported in the radial direction, and the lower end of the rotating shaft 125 is rotatably inserted into the support bracket 116 and rotated in the radial and axial directions. supported The main frame 130 includes a main bearing 171 supporting the upper end of the rotating shaft 125, and a sub bearing 172 supporting the lower end of the rotating shaft 125 is provided in the support bracket 116. Each of the main bearing 171 and the sub bearing 172 is a bush bearing.

An eccentric portion 1251 coupled eccentrically to the orbiting scroll 140 to be described later is formed at the upper end of the rotating shaft 125, and an oil feeder for sucking the oil stored in the lower portion of the casing 110 at the lower end of the rotating shaft 125. (1252) may be installed. The rotating shaft 125 is formed by penetrating an oil supply hole 1253 therein in the axial direction.

Next, the mainframe will be described.

The main frame 130 according to the present embodiment is installed above the drive motor 120 and fixed to the inner wall surface of the cylindrical shell 111 by hot press or welding.

1 to 3, the main frame 130 includes a main flange part 131, a main bearing part 132, a turning space part 133, a scroll support part 134, an Oldham ring accommodating part 135, It includes a frame fixing part 136.

The main flange portion 131 is formed in an annular shape and accommodated in the low pressure portion 110a of the casing 110 . The outer diameter of the main flange portion 131 is smaller than the inner diameter of the cylindrical shell 111 so that the outer circumferential surface of the main flange portion 131 is spaced apart from the inner circumferential surface of the cylindrical shell 111 . However, a frame fixing part 136 to be described later protrudes from the outer circumferential surface of the main flange part 131 in a radial direction, and the outer circumferential surface of the frame fixing part 136 adheres to and is fixed to the inner circumferential surface of the casing 110 . Accordingly, the frame 130 may be fixedly coupled to the casing 110 .

The main bearing part 132 is formed to protrude downward toward the drive motor 120 from the lower surface of the center of the main flange part 131 . The main bearing part 132 is formed by penetrating a bearing hole 132a having a cylindrical shape in the axial direction, and a main bearing 171 made of a bush bearing is inserted and fixedly coupled to an inner circumferential surface of the bearing hole 132a. A rotating shaft 125 is inserted into the main bearing 171 and supported in the radial direction.

The turning space portion 133 is formed by being depressed from the center of the main flange portion 131 toward the main bearing portion 132 with a predetermined depth and outer diameter. The orbiting space portion 133 is formed larger than the outer diameter of the rotating shaft coupling portion 143 provided in the orbiting scroll 140 to be described later. Accordingly, the rotating shaft coupling portion 143 may be accommodated in a pivoting manner within the turning space portion 133 .

The scroll support part 134 is formed in an annular shape along the circumference of the turning space part 133 on the upper surface of the main flange part 131 . Accordingly, the scroll support unit 134 may support the lower surface of the orbiting mirror plate unit 141 to be described later in the axial direction.

The Oldham ring accommodating portion 135 is formed in an annular shape along the outer circumferential surface of the scroll support portion 134 on the upper surface of the main flange portion 131 . Accordingly, the Oldham ring 180 may be inserted into the Oldham ring accommodating portion 135 and accommodated in a pivotal manner.

The frame fixing part 136 extends radially from the outer edge of the Oldham ring accommodating part 135 . The frame fixing part 136 may extend in an annular shape or as a plurality of protrusions spaced apart by predetermined intervals along the circumferential direction. In this embodiment, an example in which the frame fixing part 136 is formed of a plurality of protrusions along the circumferential direction is shown.

For example, a plurality of frame fixing parts 136 are formed at predetermined intervals along the circumferential direction, and bolt fastening holes 136a penetrating in an axial direction are formed in the plurality of frame fixing parts 136, respectively.

The frame fixing part 136 is formed to correspond to the guide protrusion 155 of the non-orbiting scroll 150 to be described later in the axial direction, respectively, and the bolt fastening hole 136a is formed to correspond to the guide insertion hole 154a to be described later in the axial direction, respectively. is formed to correspond to

The inner diameter of the bolt fastening hole 136a is smaller than the inner diameter of the guide insertion hole 154a. Accordingly, a stepped surface extending from the inner circumferential surface of the guide insertion hole 154a is formed around the upper surface of the bolt fastening hole 136a, and the guide bush 137 passing through the guide insertion hole 154a is formed on the stepped surface. is placed on and supported in the axial direction by the frame fixing part 136.

The guide bush 137 is formed in a hollow cylindrical shape through which the bolt insertion hole 137a penetrates in the axial direction. Each guide bolt 138 passes through the bolt insertion hole 137a of the guide bush 137 and is fastened to the bolt fastening hole 136a of the frame fixing part 136, respectively. Accordingly, the non-orbiting scroll 150 is slidably supported by the main frame 130 in the axial direction and fixed in the radial direction.

As described above, as the frame fixing parts 136 are formed at predetermined intervals along the circumferential direction, a kind of suction guide space S is formed between the frame fixing parts 136. Therefore, the refrigerant sucked into the low pressure part 110a may be guided to the suction guide 190 to be described later through the suction guide space S between the frame fixing parts 136 . Accordingly, when viewed in the axial direction, it is preferable that the refrigerant suction pipe 117 and the suction guide 190 are provided within the range of the suction guide space S to reduce flow resistance. This will be described later together with the suction guide 190.

Next, the orbiting scroll will be described.

Orbiting scroll 140 according to this embodiment is disposed on the upper surface of the main frame (130). An Oldham ring 180, which is an anti-rotation mechanism, is provided between the orbiting scroll 140 and the main frame 130 or between the non-orbiting scroll 150 to be described later to perform a orbital motion.

Referring to FIGS. 1 and 2 , the orbiting scroll 140 according to the present embodiment includes an orbiting mirror plate part 141, an orbiting wrap 142, and a rotational shaft coupling part 143.

The turning mirror plate 141 is formed in a substantially disc shape.

The orbiting wrap 142 protrudes to a predetermined height from the upper surface of the orbiting head plate 141 facing the non-orbiting scroll 150 and is formed in a spiral shape. The orbiting wrap 142 is formed to correspond to the non-orbiting wrap 153 of the non-orbiting scroll 150 to be described later so as to engage with the orbiting movement. The orbiting wrap 142 forms the compression chamber V together with the non-orbiting wrap 153.

Here, the compression chamber (V) is composed of a first compression chamber (V1) and a second compression chamber (V2) based on the non-orbiting wrap (153) to be described later. The first compression chamber V1 is formed on the outer side of the non-orbiting wrap, and the second compression chamber V2 is formed on the inner side of the non-orbiting wrap. In the first compression chamber (V1) and the second compression chamber (V2), a suction pressure chamber (V11, unsigned), an intermediate pressure chamber (V12, unsigned), and a discharge pressure chamber (V13, unsigned) are continuously formed.

The rotating shaft coupling portion 143 protrudes toward the main frame 130 from the lower surface of the turning mirror plate portion 141 . The rotating shaft coupling portion 143 is formed in a cylindrical shape, and an eccentric bearing 173 is inserted into and coupled to an inner circumferential surface of the rotating shaft coupling portion 143 . The eccentric bearing 173 may be formed of a bush bearing.

Meanwhile, an Oldham ring 180 is provided between the main frame 130 and the orbiting scroll 140 to limit rotation of the orbiting scroll 140 . As described above, the Oldham ring 180 may be slidably coupled to the main frame 130 and the orbiting scroll 140, or may be slidingly coupled to the orbiting scroll 140 and the non-orbiting scroll 150, respectively. may be

Next, the non-orbiting scroll will be described.

The non-orbiting scroll 150 according to the present embodiment is disposed above the orbiting scroll 140. The non-orbiting scroll 150 may be fixedly coupled to the main frame 130 or may be movably coupled in the vertical direction. In this embodiment, an example in which the non-orbiting scroll 150 is movably coupled to the main frame 130 in the axial direction is shown.

1 to 3, the non-orbiting scroll 150 according to the present embodiment includes a non-orbiting head plate portion 151, a non-orbiting side wall portion 152, and a non-orbiting wrap 153.

The non-orbiting mirror plate portion 151 is formed in a disk shape and disposed in the transverse direction in the low pressure portion 110a of the casing 110 . A discharge port 151a, a bypass hole 151b, and a scroll side back pressure hole 151c are formed through the central portion of the non-orbiting mirror plate portion 151 in the axial direction.

The discharge port 151a is formed at a position where the discharge pressure chamber (unsigned) of the first compression chamber (V1) and the discharge pressure chamber (unsigned) of the second compression chamber (V2) communicate with each other, and the bypass hole 151b is Formed to communicate with the first compression chamber (V1) and the second compression chamber (V2), respectively, the scroll-side back pressure hole (hereinafter referred to as the first back pressure hole) 151c is formed from the discharge port 151a and the bypass hole 151b. formed apart from

The non-orbiting side wall portion 152 extends in the axial direction from the bottom edge of the non-orbiting mirror plate portion 151 and is formed in an annular shape.

On one side of the outer circumferential surface of the non-orbiting side wall portion 152, a suction port 152a is formed by penetrating in the radial direction, and on one side of the circumferential direction of the suction port 152a, it extends stepwise along the axial direction from the outer circumferential surface of the non-orbiting mirror plate portion 151. An axial stepped surface (hereinafter referred to as a first stepped surface) 152b is formed. The intake port 152a is formed in an arc shape by a predetermined length along the outer circumferential surface of the non-orbiting side wall portion 152, and the first stepped surface 152b is an arc at approximately the same height as the intake port 152a or slightly higher than the intake port. formed into a shape Accordingly, the first fixing protrusion 191a of the suction guide 190, which will be described later, is axially supported on the first stepped surface 152b, and the passage entrance 190b of the suction guide 190 is attached to the suction port 152a. can be intertwined

A guide protrusion 155 extending in the radial direction is formed on the lower outer circumferential surface of the non-orbiting side wall portion 152 . The guide insertion holes 155a described above are formed in the guide protrusions 155, respectively.

A plurality of guide protrusions 155 may be provided at predetermined intervals along the circumferential direction, or may be provided with one guide protrusion 155 . When there are a plurality of guide protrusions 155, guide insertion holes 155a are formed in each guide protrusion 155, and when there is only one guide protrusion 155, a plurality of guide insertion holes 155a are formed in the circumferential direction. It is formed at predetermined intervals along. In this embodiment, a case in which a plurality of guide protrusions 155 are provided will be described as an example.

2 and 3, among the plurality of guide protrusions 155, the guide protrusions facing the outlet end 177a of the refrigerant suction pipe 117 or adjacent to the outlet end 177a of the refrigerant suction pipe 117 (hereinafter, A suction port 152a may be formed on the upper side of the suction-side guide protrusion 1551, and a suction guide groove 1551a may be formed on an outer circumferential surface of the suction-side guide protrusion 1551.

For example, the inlet (152a) is formed to penetrate between the outer and inner circumferential surfaces of the non-orbiting side wall portion 152, and the suction guide groove (1551a) is formed from the center of the outer circumference of the suction-side guide protrusion 1551 toward the inner circumference. It may be formed by being depressed by a set depth.

The suction guide groove 1551a may be recessed to the middle of the suction-side guide protrusion 1551 in the radial direction. Accordingly, a circumferential extension 1551b connecting between both inner surfaces of the suction-side guide protrusion 1551 is formed on the inner circumferential side of the suction guide groove 1551a, and a suction guide (to be described later) is formed on the circumferential extension 1551b. The side wall portions 191 and 192 or the lower wall portion 196 of 190 may be placed on and supported in the axial direction. Since the circumferential extension 1551b may interfere with the passage inlet 190b of the suction guide 190 to reduce the suction area, it may be desirable to form it as narrow as possible.

Although not shown in the drawings, the suction guide groove 1551a may be recessed to the inner circumferential root of the suction-side guide protrusion 1551, that is, to the outer circumferential surface of the non-orbiting side wall portion 152. In this case, the previously described circumferential extension 1551b of the suction-side guide protrusion 1551 does not occur or is minimally generated, so that the area blocking the passage inlet 190b of the suction guide 190 can be reduced. In this case, the flow resistance of the suction refrigerant toward the suction guide 190 is reduced, so that the amount of refrigerant sucked into the compression chamber without passing through the drive motor 120 can be increased.

In addition, although not shown in the drawings, the inlet 152a may be formed between two guide protrusions 155 adjacent in the circumferential direction among a plurality of guide protrusions 155 instead of being formed in the middle of the suction-side guide protrusion 1551. there is. In this case, since the circumferential extension 1551b described above is not formed between both guide protrusions 155 and a kind of suction guide space is formed between both guide protrusions 155, the suction area can be expanded.

On the other hand, the inlet 152a and the suction guide groove 1551a are formed to overlap on the same line in the radial direction when projected in the axial direction, and the refrigerant suction pipe 117 is formed in the circumferential direction of the suction port 152a and the suction guide groove 1551a. It may be arranged so that at least a part is located within the range. Accordingly, the refrigerant that is sucked into the low-pressure part 110a of the casing 110 through the refrigerant suction pipe 117 and not toward the drive motor 120 is transferred to the suction guide 190 to be described later through the suction guide groove 1551a. can enter quickly. This will be described later together with the suction guide 190.

The non-orbiting wrap 153 is formed in a spiral shape and may be formed corresponding to the orbiting wrap 142 so as to be engaged with the orbiting wrap 142 . A description of the non-orbiting wrap 153 is replaced with a description of the orbiting wrap 142.

Meanwhile, the back pressure chamber assembly 160 according to the present embodiment is installed above the non-orbiting scroll 150. Accordingly, the non-orbiting scroll 150 is pushed toward the orbiting scroll 140 by the back pressure force of the back pressure chamber 160a (accurately, the force applied to the back pressure chamber) to seal the compression chamber V. will do

Referring to FIGS. 1 and 2 , the back pressure chamber assembly 160 includes a back pressure plate 161 and a floating plate 165 . The back pressure plate 161 is coupled to the upper surface of the non-orbiting mirror plate 151, and the floating plate 165 is slidably coupled to the back pressure plate 161 to form a back pressure chamber 160a together with the back pressure plate 161. do.

The back pressure plate 161 includes a fixed plate portion 1611 , a first annular wall portion 1612 , and a second annular wall portion 1613 .

The fixed plate portion 1611 is formed in the shape of an annular plate with a hollow center, and a plate-side back pressure hole (hereinafter referred to as a second back pressure hole) 1611a penetrates in the axial direction. The second back pressure hole 1611a communicates with the first back pressure hole 151c and communicates with the back pressure chamber 160a. Accordingly, the second back pressure hole 1611a and the first back pressure hole 151c communicate between the compression chamber V and the back pressure chamber 160a.

The first annular wall portion 1612 and the second annular wall portion 1613 are formed on the upper surface of the fixing plate portion 1611 to surround the inner and outer circumferential surfaces of the fixing plate portion 1611 . The outer circumferential surface of the first annular wall portion 1612, the inner circumferential surface of the second annular wall portion 1613, the upper surface of the fixed plate portion 1611, and the lower surface of the floating plate 165 form an annular pressure back chamber 160a.

An intermediate discharge port 1612a communicating with the discharge port 151a of the non-orbiting scroll 150 is formed in the first annular wall portion 1612, and a check valve (hereinafter referred to as a discharge valve) 157 is formed inside the intermediate discharge port 1612a. A valve guide groove 1612b into which is slidably inserted is formed, and a backflow prevention hole 1612c is formed at the center of the valve guide groove 1612b. Accordingly, the discharge valve 157 selectively opens and closes the gap between the discharge port 151a and the middle discharge port 1612a to prevent the discharged refrigerant from flowing backward into the compression chamber.

The floating plate 165 is formed in an annular shape and may be formed of a material lighter than that of the back pressure plate 161 . Accordingly, the floating plate 165 moves in the axial direction with respect to the back pressure plate 161 according to the pressure in the back pressure chamber 160a and is detached from the lower surface of the high and low pressure separator 115.

For example, when the floating plate 165 comes into contact with the high and low pressure separator 115, it seals the discharged refrigerant so that it is discharged to the high pressure part 110b without leaking into the low pressure part 110a.

The scroll compressor according to the present embodiment as described above operates as follows.

That is, when power is applied to the stator coil 121a of the stator 121, the rotor 122 rotates together with the rotating shaft 125. Then, the orbiting scroll 140 coupled to the rotation shaft 125 performs a orbiting motion with respect to the non-orbiting scroll 150, and between the orbiting wrap 142 and the non-orbiting wrap 153, two pairs of compression A thread V is formed. The compression chamber (V) is gradually reduced in volume while moving from the outside to the inside according to the turning motion of the orbiting scroll (140).

At this time, the refrigerant is sucked into the low pressure part 110a of the casing 110 through the refrigerant suction pipe 117, and a part of the refrigerant is sucked into each of the first compression chamber V1 and the second compression chamber V2. It is directly sucked into the pressure chamber (V11, unsigned), while the rest first moves toward the drive motor 120 and is later sucked into the suction pressure chamber (V11, unsigned). This will be explained again later.

Then, the refrigerant is compressed while moving along the moving path of the compression chamber V, and a part of the compressed refrigerant passes through the first back pressure hole 151c to the back pressure chamber 160a before reaching the outlet 151a. will move Accordingly, the back pressure chamber 160a formed by the back pressure plate 161 and the floating plate 165 forms an intermediate pressure.

Then, the floating plate 165 rises toward the high and low pressure separator 115 and comes into close contact with the sealing plate 1151 provided on the high and low pressure separator 115 . Then, the high-pressure part 110b of the casing 110 is separated from the low-pressure part 110a, and the refrigerant discharged from each of the compression chambers V1 and V2 to the high-pressure part 110b can be prevented from flowing backward to the low-pressure part 110a. there will be

On the other hand, the back pressure plate 161 receives pressure in the direction toward the non-orbiting scroll 150 by the pressure of the back pressure chamber 160a and descends, and presses the non-orbiting scroll 150 toward the orbiting scroll 140. . Then, the non-orbiting scroll 150 comes into close contact with the orbiting scroll 140, so that the refrigerant to be compressed can be prevented from leaking from the high-pressure side compression chamber constituting the intermediate pressure side to the low-pressure side compression chamber.

At this time, the refrigerant is compressed to a set pressure while moving from the intermediate pressure chamber toward the discharge pressure chamber, but the pressure of the refrigerant may rise above the predetermined pressure due to various conditions occurring during operation of the compressor. Then, part of the refrigerant moving from the intermediate pressure chamber to the discharge pressure chamber is bypassed from the intermediate pressure chamber constituting each of the compression chambers V1 and V2 through the bypass hole 151b toward the high-pressure unit 110b before reaching the discharge pressure chamber. Passed. Then, the overcompression of the refrigerant to a set pressure or higher in the compression chamber can be suppressed, thereby increasing the efficiency of the compressor and ensuring stability.

The refrigerant moved to the discharge pressure chamber is discharged to the high pressure part 110b through the discharge port 151a and the middle discharge port 1612a while pushing the discharge valve 157, and the refrigerant fills the high pressure part 110b and then the refrigerant discharge pipe 118 ), a series of processes discharged through the condenser of the refrigeration cycle are repeated.

Meanwhile, the refrigerant discharged to the high-pressure part 110b becomes a high-temperature and high-pressure state. The high-temperature and high-pressure refrigerant comes into contact with the upper cap 112 and the high and low pressure separator 115 constituting the high pressure part 110b to heat the upper cap 112 and the high and low pressure separator 115. In particular, as the high and low pressure separator 115 serves to separate the inner space of the casing 110 into a low pressure part 110a and a high pressure part 110b, high pressure is generated by the refrigerant discharged to the high pressure part 110b during operation of the compressor. The temperature of the low pressure separator 115 is greatly increased.

When the temperature of the high and low pressure separator 115 rises, a part of the suction refrigerant sucked into the low pressure part 110a comes into contact with the high and low pressure separator 115 to receive conduction heat before being sucked into the compression chamber V, or It can be heated by radiant heat generated from the high and low pressure separator 115. Then, the specific volume of the suctioned refrigerant increases, and as the amount of refrigerant sucked into the compression chamber decreases, compressor efficiency may decrease.

Therefore, in this embodiment, the suction guide 190 is provided between the inlet of the compression chamber, that is, the refrigerant suction pipe 117 and the high and low pressure separator 115, so that the suction refrigerant is directly or indirectly transferred by the high and low pressure separator 115. heating can be prevented. Through this, the increase in the specific volume of the refrigerant sucked into the compression chamber V is suppressed, thereby increasing the amount of refrigerant sucked into the compression chamber V, thereby improving compressor efficiency. In addition, in this embodiment, a suction guide 190 is provided, but a portion of the suction refrigerant may be guided to move toward the driving motor 120 . Through this, a part of the suction refrigerant is guided toward the drive motor 120 to suppress overheating of the drive motor 120, thereby further improving compressor efficiency and at the same time reducing the operable range (operating range) due to overheating of the drive motor 120. can prevent it from happening.

Figure 4 is a perspective view showing the suction guide according to the present embodiment separated, Figure 5 is a perspective view showing the suction guide according to Figure 4 from the inside, Figure 6 is a perspective view showing the suction guide according to Figure 5 from the outside, 7 is a plan view showing an assembled suction guide according to the present embodiment, and FIG. 8 is a cross-sectional view “IV-IV” of FIG. 7 .

Referring to these drawings, the suction guide 190 according to this embodiment may be provided between the refrigerant suction pipe 117 and the high and low pressure separator 115. In other words, the suction guide 190 is lower than the high and low pressure separator 115 but may be provided above the refrigerant suction pipe 117 . Accordingly, the suction refrigerant sucked into the low pressure part 110a of the casing 110 through the refrigerant suction pipe 117 can be prevented from being blocked by the suction guide 190 and directed toward the high and low pressure separator 115 . Through this, it is possible to suppress direct or indirect heating of the suction refrigerant by the high and low pressure separator 115 .

In addition, the suction guide 190 according to the present embodiment may be manufactured separately and coupled to the non-orbiting scroll 150. Accordingly, the suction guide 190 may be formed of a material different from that of the non-orbiting scroll 150, for example, a material having a low thermal conductivity such as Teflon. Accordingly, it is possible to suppress the suction refrigerant passing through the suction guide 190 from being heated by radiant heat transmitted through the high and low pressure separator 115 .

In addition, as the suction guide 190 according to this embodiment is manufactured separately from the non-orbiting scroll 150, the shape of the suction guide 190 can be formed in various ways in response to surrounding conditions. Through this, it is possible to more effectively suppress the suction refrigerant from moving toward the high and low pressure separator 115 by bypassing the suction guide 190 .

Specifically, the suction guide 190 according to the present embodiment is a single body and may be formed in a substantially hexahedral hollow box shape. For example, the suction guide 190 includes a first side wall portion 191, a second side wall portion 192, an outer wall portion 193, an inner wall portion 194, an upper wall portion 195, and a lower wall portion 196. can do. Among these wall parts, the first side wall part 191, the second side wall part 192, the outer wall part 193, and the upper wall part 195 form the suction passage, and the lower wall part 196 forms the entrance of the suction passage 190a. The passage inlet portion 190b and the inner wall portion 194 form the passage outlet portion 190c forming the outlet of the suction passage 190a, respectively.

The first side wall portion 191 and the second side wall portion 192 are provided on both sides of the inlet 152a in the circumferential direction, respectively, and may extend substantially radially toward the inner circumferential surface of the cylindrical shell 111 constituting the casing 110. there is. For example, the first side wall portion 191 and the second side wall portion 192 may be formed in a shape substantially corresponding to both side surfaces of the suction guide groove 1551a in the suction-side guide protrusion 1551 described above.

The suction guide groove 1551a according to this embodiment may be formed shorter than the suction port 152a. In other words, even if the circumferential length of the suction-side guide protrusion 1551 is longer than the circumferential length of the suction port 152a, the circumferential length of the suction-side guide groove 1551a depends on the surrounding conditions of the suction-side guide protrusion 1551. It may be formed shorter than the circumferential length of the inlet (152a).

For example, the cross-sectional area of the outer wall portion 193 is smaller than or equal to the cross-sectional area of the inner wall portion 194, and at least a portion of the intake port 152a is directed toward the first side wall portion 191 with respect to the suction guide groove 1551a. Alternatively, it may be formed eccentrically toward the second side wall portion 192.

In this case, at least one of the side wall parts 191 and 192 of the first side wall part 191 and the second side wall part 192 may be formed to be curved according to the shape of the side surface of the suction guide groove 1551a. The intake port 152a according to the present embodiment is formed eccentrically toward the second side wall portion 192 with respect to the suction guide groove 1551a, and the second side wall portion 192 extends from the outer wall portion 193 to the inner wall portion 194. It may extend in a curved shape so that the distance between the first side wall portion 191 and the second side wall portion 192 increases toward the . Accordingly, even if the shape of the non-orbiting scroll 150, that is, the circumferential length of the suction guide groove 1551a provided on the suction-side guide protrusion 1551 is shorter than the circumferential length of the suction port 152a, the suction guide 190 A can accommodate the entire suction port (152a).

The lower end of the first side wall portion 191 and the lower end of the second side wall portion 192 may be placed on and supported on the upper surface of the suction-side guide protrusion 1551 . However, the outer surface of the lower end of the first side wall portion 191 and the outer surface of the lower end of the second side wall portion 192 may be supported in close contact with the inner surface of the suction guide groove 1551a, respectively.

For example, referring to FIG. 4 , the upper surface of the suction-side guide protrusion 1551 located on both sides of the suction-side guide protrusion 1551a and the upper surface of the circumferential extension portion 1551b connecting the suction-side guide protrusion 1551. Circumferentially stepped surfaces (hereinafter referred to as second stepped surfaces) 1551c are formed between the bottom outer surface of the first side wall portion 191 constituting the suction guide 190 and the lower end of the second side wall portion 192. The outer surface may be brought into close contact with the previously described second stepped surface in the circumferential direction, respectively. Accordingly, a gap is generated between the first side wall portion 191 and the inner surface of the suction-side guide protrusion 1551 facing it, and between the second side wall portion 192 and the inner surface of the suction-side guide protrusion 1551 facing it. It is possible to suppress the suction refrigerant from moving toward the high and low pressure separator 115 by avoiding the suction guide 190. In addition, the suction guide 190 can be stably fixed to the non-orbiting scroll 150 as the first side wall portion 191 adheres closely to the inner surface of the suction-side guide protrusion 1551 and is supported.

Meanwhile, a suction hole 192b may be further formed in at least one side wall portion 191 or 192 of the first side wall portion 191 and the second side wall portion 192 . The suction hole 192b may form a passage inlet portion 190b of the suction guide 190 together with a lower wall portion 196 to be described later. In this case, the cross-sectional area of the passage inlet portion 190b may be enlarged. This will be described again later with reference to FIG. 15 .

4, 7 and 8, the outer wall portion 193 of the suction guide 190 according to the present embodiment includes the outer end of the first side wall portion 191 and the outer end of the second side wall portion 192. It can be formed to connect. The outer wall portion 193 is formed as a closed flat surface to seal the outer circumferential side of the suction passage 190a, and may be formed as a closed curved surface corresponding to the inner circumferential surface of the cylindrical shell 111 or the inner circumferential surface of the upper shell 112.

For example, the outer wall portion 193 may be in close contact with the inner circumferential surface of the cylindrical shell 111 constituting the casing 110 . In other words, the outer circumferential surface of the outer wall portion 193 may be formed in a curved shape having the same curvature as the inner circumferential surface of the casing 110 (to be precise, the inner circumferential surface of the high-low pressure separator, but hereinafter, for convenience, it will be defined as the inner circumferential surface of the casing). there is. Accordingly, the outer circumferential surface of the outer wall portion 193 comes into close contact with the inner circumferential surface of the casing 110 to more closely seal both sides in the axial direction of the suction guide 190, and the lower side of the suction guide 190 through the refrigerant suction pipe 117. It is possible to suppress the suction refrigerant sucked into the suction guide 190 from flowing toward the high and low pressure separator 115.

However, in this case, as described above, the suction guide 190 including the outer wall portion 193 is formed of a material having a lower thermal conductivity than at least the non-orbiting scroll (!50), for example, a plastic material such as Teflon. It is preferable because it can suppress heat conduction through (110).

Although not shown in the drawing, the outer wall portion 193 may be formed in a plane. In this case, sealing protrusions (not shown) having the same curvature as the inner circumferential surface of the casing 110 may be further formed at both ends of the outer circumferential surface of the outer wall portion 193 .

Although not shown in the drawing, when the suction guide 190 including the outer wall portion 193 is made of a metal such as the high and low pressure separator 115 or a material having a thermal conductivity equivalent thereto, the outer wall portion 193 is formed of a casing. It is preferable to be formed so as to be spaced apart from the inner circumferential surface of (110).

The outer wall portion 193 is substantially equal to the axial height of the first side wall portion 191 and the axial height of the second side wall portion 192, and is approximately equal to the circumferential length of the upper wall portion 195 and the circumference of the lower wall portion 196. It may be formed approximately equal to the direction length. In other words, the outer wall portion 193 may be formed to have the same height as the outer surface of some wall portions 191, 192, 195, and 196 forming the outer surface of the suction passage 190a. Accordingly, the suction guide 190 can be easily manufactured and assembled.

5 and 6, the inner wall portion 194 of the suction guide 190 according to this embodiment is formed to connect the inner end of the first side wall portion 191 and the inner end of the second side wall portion 192. It can be. As described above, the inner wall portion 194 is a surface forming the passage exit of the suction guide 190, and may be entirely open or only partially open. In this embodiment, an example in which the entire inner wall portion 194 is opened is shown.

The cross-sectional area of the inner wall portion 194 (or the cross-sectional area of the outlet portion) may be greater than or equal to the cross-sectional area of the suction port 152a. Accordingly, the inner wall portion 194 can accommodate the entire suction port 152a, thereby minimizing flow resistance in the suction passage 190a.

4 to 6, the upper wall portion 195 of the suction guide 190 according to the present embodiment includes the upper end of the first side wall portion 191, the upper end of the second side wall portion 192, and the outer wall portion ( 193) may be formed to connect the upper end. The upper wall portion 195 may be formed as a closed plane to seal the upper side of the suction passage !90a.

The upper wall portion 195 may have the same thickness as the other wall portions 191, 192, 193, 195, and 196. However, the upper wall portion 195 is a surface facing the high and low pressure separator 115 in the axial direction and is positioned closest to the high and low pressure separator 115. Accordingly, the upper wall portion 195 may be formed thicker than other wall portions. This will be described again later with reference to FIGS. 9 and 10 .

Referring to Figures 5 and 6, the lower wall portion 196 of the suction guide 190 according to the present embodiment, as described above, is entirely open or only partially to form the passage inlet portion 190b of the suction guide 190. It can be formed by opening. It is advantageous to secure the suction volume when the passage inlet portion 190b is formed as wide as possible. In this embodiment, an example in which almost the entirety of the lower wall portion 196 is opened is shown.

The lower wall portion 196 is disposed above the refrigerant suction pipe 117, and the center line passing through the lower wall portion 196 intersects the center line passing through the outlet end of the refrigerant suction pipe 117, specifically orthogonal. direction can be placed.

For example, a center line passing through the outlet end 117a of the refrigerant suction pipe 117 may be formed in a radial direction, whereas a center line passing through the lower wall portion 196 may be formed in an axial direction. Accordingly, the lower wall portion 196 may be disposed above the outlet end 117a of the refrigerant suction pipe 117 in a direction orthogonal to the outlet end 117a of the refrigerant suction pipe 117 .

Meanwhile, fixing protrusions 191a and 192a for fixing the suction guide 190 to the non-orbiting scroll 150 are further formed on the outer surfaces of the first side wall portion 191 and the second side wall portion 192 described above. It can be. For example, the first fixing protrusion 191a may extend from the outer surface of the first side wall portion 191 and the second fixing protrusion 192a may extend from the outer surface of the second side wall portion 192 .

Specifically, the first fixing protrusion 191a extends in the circumferential direction from the upper end of the first side wall portion 191, and the second fixing protrusion 192a extends from the lower end of the second side wall portion 192 to the first fixing protrusion ( It may extend in the circumferential direction opposite to 191a). Accordingly, the first fixing protrusion 191a rests on the first stepped surface 152b of the non-orbiting side wall 152 and is supported in the axial direction, and the second fixing protrusion 192a is the upper surface of the suction-side guide protrusion 1551 It can be rested on and supported in the axial direction.

Although not shown in the drawings, the first fixing protrusion 191a and the second fixing protrusion 192a may be formed in various ways according to the positions of the first stepped surface 152b and the second stepped surface. For example, the first fixing protrusion 191a and the second fixing protrusion 192a may be formed opposite to those of the previous embodiment or may be formed at the same height as each other. Alternatively, only one fixing protrusion of the first fixing protrusion 191a and the second fixing protrusion 192a may be provided.

On the other hand, the lower inner surface of the first side wall portion 191 constituting the passage inlet portion 190b, the lower inner surface of the second side wall portion 192, and the lower inner surface of the outer wall portion 193 have stepped portions (unsigned), respectively. ) can be formed in succession. Accordingly, the area of the passage inlet portion 190b is enlarged so that the refrigerant flows into the suction guide more smoothly.

The process of sucking the refrigerant in the scroll compressor equipped with the suction guide 190 according to the present embodiment as described above is as follows.

Referring to FIGS. 2 and 8 , the refrigerant sucked into the low-pressure portion 110a of the casing 110 through the refrigerant suction pipe 117 may be roughly separated into an upstream refrigerant and a downstream refrigerant. It can be understood that the upstream refrigerant flows upward with respect to the refrigerant suction pipe 117, and the downstream refrigerant flows downward with respect to the refrigerant suction pipe 117.

The upstream refrigerant flows into the refrigerant passage 190a through the passage inlet 190b of the suction guide 190 and moves along the suction passage 190a of the suction guide 190 to the passage outlet of the suction guide 190. It is directly sucked into the compression chamber (suction pressure chamber) V through the part 190c and the suction port 152a. Accordingly, since the upstream refrigerant does not come into contact with the driving motor 120, the increase in the specific volume of the refrigerant sucked into the compression chamber V can be reduced and the efficiency of the compressor can be improved.

At this time, the upstream refrigerant may be suppressed from moving toward the high and low pressure separator 115 by the suction guide 190 . Accordingly, before the intake refrigerant is sucked into the compression chamber (V), contact with the high and low pressure separator 115 to be heated due to conduction heat or heated due to radiant heat around the high and low pressure separator 115 can be suppressed. . Through this, the compressor efficiency can be further improved.

Meanwhile, the passage inlet portion 190b of the suction guide 190 according to the present embodiment is disposed above the outlet end 117a of the refrigerant suction pipe 117 in the axial direction. Accordingly, a part of the suction refrigerant sucked into the low-pressure part 110a through the refrigerant suction pipe 117 is not directly sucked into the passage inlet 190b of the suction guide 190, but drives while forming the downstream refrigerant as described above. It moves towards the motor 120.

The downstream refrigerant circulates through the low-pressure part 110a of the casing 110 and contacts the drive motor 120 to cool the drive motor 120, then rises again and passes through the suction guide 190 to the compression chamber V. ) is inhaled. Accordingly, the drive motor is cooled by the downstream refrigerant, and overheating is suppressed, and the operating range of the compressor can be expanded.

On the other hand, the case where there is another embodiment of the suction guide is as follows.

That is, in the above-described embodiment, all of the wall portions constituting the suction passage are formed to have the same thickness, but in some cases, some wall portions may be formed thicker than other wall portions.

9 is a perspective view showing another embodiment of the suction guide according to FIG. 1 by being broken, and FIG. 10 is a cross-sectional view showing a state in which the suction guide of FIG. 9 is coupled.

Referring to Figures 9 and 10, the basic shape of the suction guide according to the present embodiment and the operational effect thereof are similar to those of the above-described embodiments, so the description thereof is replaced with the description of the above-described embodiments.

However, in the suction guide 190 according to this embodiment, the thickness t1 of some of the wall parts, specifically the upper wall part 195, among the wall parts constituting the suction passage 190a, is different from the wall parts 191, 192, and 193 ) (195) may be formed thicker than the thickness (t2) of (196).

For example, the thickness t1 of the upper wall portion 195 may be formed to be approximately twice or more thick than the thickness t2 of the first side wall portion 191 or the second side wall portion 192 .

As described above, when the thickness t1 of the upper wall portion 195 is thicker than the thickness t2 of the other wall portions 191, 192, 193, 195, and 196, the high and low pressure separator 115 ), it is possible to more effectively block radiant heat transmitted to the suction guide 190.

In other words, the upper wall portion 195 is a surface facing the high and low pressure separator 115 in the axial direction, and the high and low pressure separator 115 is higher than the other wall portions 191, 192, 193, 195, and 196. ) is located closest to it. Accordingly, when the upper wall portion 195 is formed to be thicker than other wall portions, radiant heat transmitted through the high and low pressure separator 115 can be effectively blocked.

Although not shown in the drawings, a heat insulating coating or a heat insulating layer may be added to the outer surface (upper surface) or inner surface of the upper wall portion 195 . Also, in addition to the upper wall portion 195, the first side wall portion 191 and the second side wall portion 192 may be thicker than the outer wall portion 193 or the inner wall portion 194 like the upper wall portion 195. there is.

On the other hand, another embodiment of the suction guide is as follows.

That is, in the above-described embodiment, the outer wall portion is formed to have the same surface height as the outer surface of the wall portions constituting the suction passage, but in some cases, the outer wall portion is formed to protrude from the outer surface of the wall portions constituting the suction passage. can

11 is a perspective view showing another embodiment of the suction guide according to FIG. 1, and FIG. 12 is a plan view showing an assembled state of the suction guide of FIG. 11. Referring to FIG.

Referring to FIGS. 11 and 12 , the suction guide 190 according to this embodiment may be formed similarly to the suction guide 190 of FIG. 4 described above as a whole. Accordingly, the basic configuration of the suction guide 190 and the effect thereof are replaced with the description of the above-described embodiment.

However, in this embodiment, sealing extension portions 193a and 193a may be provided on both sides of the outer wall portion 193 in the circumferential direction, respectively. For example, the ceiling extensions 193a and 193a may be formed to protrude in a circumferential direction from outer surfaces of the first sidewall portion 191 and the outer surfaces of the second sidewall portion 192 .

The outer circumferential surfaces of the sealing extensions 193a and 193a may be formed to be in almost surface contact with the inner circumferential surface of the casing 110 facing them. For example, the outer circumferential surface of the sealing extension part 193a (193a) may extend the same as the curvature of the outer circumferential surface of the outer wall part 193.

The inner circumferential surfaces of the sealing extensions 193a and 193a may be formed to correspond to the corner shapes of the suction-side guide protrusions 1551 facing them. For example, when the corners of the suction-side guide protrusion 1551 are curved as shown in FIG. 12, the inner circumferential surfaces of the sealing extensions 193a and 193a may also be curved correspondingly.

As described above, when the sealing extensions 193a and 193a are formed at both ends of the outer wall 193 in the circumferential direction, the suction guide 190 is accommodated with a gap between the inner surface of the suction guide groove 1551a. Even if it is, it is possible to minimize the gap generated between the inner surface of the suction guide groove (1551a) and the suction guide (190). Accordingly, it is possible to further suppress the suction refrigerant sucked into the lower side of the suction guide 190 through the refrigerant suction pipe 117 from flowing toward the high and low pressure separator 115 avoiding the suction guide 190 .

Although not shown in the drawings, the outer wall portion 193 may extend from the first side wall portion 191 and the second side wall portion 192 toward the driving motor 120, that is, downward. In this case, the outer wall portion 193 is preferably extended by a length that does not overlap with the outlet end of the refrigerant suction pipe 117 in the axial direction in view of the flow resistance of the suction refrigerant.

On the other hand, another embodiment of the suction guide is as follows.

That is, in the above-described embodiment, the lower end of the suction guide is formed flat on the upper side of the refrigerant suction pipe, but in some cases, the lower end of the suction guide may extend lower than the refrigerant suction pipe.

13 is a perspective view showing another embodiment of the suction guide according to FIG. 1, and FIG. 14 is a cross-sectional view showing an assembled state of the suction guide of FIG.

Referring to Figures 13 and 14, the suction guide 190 according to this embodiment may be formed similarly to the above-described embodiment as a whole. For example, the suction guide 190 includes a first side wall portion 191, a second side wall portion 192, an outer wall portion 193, an inner wall portion 194, an upper wall portion 195, and a lower wall portion 196. can do. Among these wall parts, the first side wall part 191, the second side wall part 192, the outer wall part 193, and the upper wall part 195 are used for the suction passage 10a, and the lower wall part 196 is the suction passage 190a. The passage inlet portion 190b forming the inlet and the inner wall portion 194 form the passage outlet portion 190c forming the outlet of the suction passage 190a.

In the suction guide 190 as described above, the lower wall portion 196 constituting the passage inlet portion 190b is located above the outlet end 117a of the refrigerant suction pipe 117 and intersects the refrigerant suction pipe 117. will be placed as Accordingly, some of the refrigerant sucked into the low-pressure part of the casing 110 through the refrigerant suction pipe 117 is directly sucked into the compression chamber V through the suction guide 190, while other refrigerant flows toward the drive motor 120. After cooling the drive motor 120, it is sucked into the suction guide 190. Since this is the same as the above-described embodiment, a detailed description thereof is replaced with the description in the above-described embodiment.

However, in this embodiment, the suction extension part extends from the lower wall part 196 toward the drive motor 120 or extends from the first side wall part 191 and the second side wall part 192 toward the drive motor 120. (197) may be further provided. In this embodiment, since the entire lower wall portion 196 is opened, an example in which the suction extension portion extends from the lower end of the first side wall portion 191 and the lower end of the second side wall portion 192 is disclosed.

At least a portion of the suction extension 197 according to the present embodiment may be formed to overlap the outlet end 117a of the refrigerant suction pipe 117 in the radial direction. In other words, the suction extension part may extend toward the drive motor 120 so that its lower end may be positioned lower than the outlet end 117a of the refrigerant suction pipe 117 . Accordingly, even if the passage inlet portion 190b of the suction guide 190 is disposed higher than the outlet end 117a of the refrigerant suction pipe 117, a portion of the downstream refrigerant may be guided to the compression chamber by the suction extension portion 197. . Through this, it is possible to appropriately reduce the heating of the downstream refrigerant in contact with the driving motor 120, thereby increasing the efficiency of the compressor.

The suction extension part 197 according to this embodiment may be formed parallel to the axial direction. However, it may be preferable that the upper end of the suction extension part 197 is positioned farther from the inner circumferential surface of the casing 110 than the lower end thereof.

For example, the first distance G1 is from the lower end facing the driving motor 120 to the inner circumferential surface of the casing 110, and the second distance G1 is from the upper end facing the passage inlet 190b to the inner circumferential surface of the casing 110. When referred to as (G2), the second interval G2 may be larger than the first interval G1. Accordingly, the suction extension part 197 moves away from the outlet end 117a of the refrigerant suction pipe 117 from the bottom to the top, so that the refrigerant sucked into the low pressure part 110a flows more smoothly toward the suction guide 190. It can be.

In addition, the suction extension part 197 according to this embodiment may be formed in a flat shape, but may also be formed in an arc cross-section shape or a wedge cross-section shape to surround the outlet end 117a of the refrigerant suction pipe 117. When the suction extension part 197 is formed in a circular arc cross-section shape or a wedge cross-section shape, the refrigerant sucked into the low pressure part 110a through the refrigerant suction pipe 117 is a suction extension facing the refrigerant suction pipe 117 ( 197) can be collected by the inner circumferential surface and introduced into the suction guide 190 more smoothly.

On the other hand, another embodiment of the suction guide is as follows.

That is, in the above-described embodiment, the first side wall portion and the second side wall portion constituting the side surface of the suction guide are formed in a blocked shape, but in some cases, at least one side wall portion of the first side wall portion and the second side wall portion is formed. A suction hole may be formed.

15 is a perspective view showing another embodiment of the suction guide according to FIG. 1;

Referring to FIG. 15, since the suction guide 190 according to this embodiment is generally similar to the previous embodiments, the detailed description thereof is replaced by the description of the above-described embodiments.

However, in this embodiment, a suction hole 192b may be further formed in the second side wall portion 192 . The suction hole 192b may form a passage inlet portion 190b of the suction guide 190 together with a lower wall portion 196 to be described later. The suction hole 192b may be formed through the middle of the second side wall portion 192 or may be formed extending from the lower wall portion 196 .

It may be advantageous in terms of enlarging the suction area while securing the support strength of the suction guide 190 that the suction hole 192b is formed as large as possible within a range that does not interfere with the circumferential extension portion 1551b.

As described above, when the suction hole 192b constituting the passage inlet 190b is formed in the first side wall portion 191 or/and the second side wall portion 192, the cross-sectional area of the entire passage inlet portion 190b is enlarged. It can be. Accordingly, the suction refrigerant flows into the suction guide 190 more smoothly, thereby increasing the volumetric efficiency.

On the other hand, in the above-described embodiments, the outer wall portion 193 of the suction guide 190 is spaced apart from the casing 110, but in some cases the outer wall portion 193 of the suction guide 190 is of the casing 110. It may be fixed to the inner periphery. For example, a guide bracket (not shown) may be fixed to an inner circumferential surface of the casing 110, and a suction guide 190 may be coupled to the guide bracket. The guide bracket is located between the refrigerant suction pipe 117 and the high and low pressure separator 115, and the suction guide 190 may be formed similarly to the above-described embodiments. However, when the suction guide 190 is made of a metal material, the suction guide 190 may be directly welded to the casing 110 and fixed.

As described above, in the structure in which the outer wall portion 193 of the suction guide 190 is fixed to the casing 110, the inner wall portion 194 of the suction guide 190 may be spaced apart from the non-orbiting scroll 150, and It may also be coupled to the orbiting scroll (150). Accordingly, in a structure in which the outer wall portion 193 of the suction guide 190 is fixed to the casing 110, a structure in which the non-orbiting scroll 150 is fixed to the casing 110 may be more suitable. Even in this case, the suction guide 190 has a basic configuration and operational effect similar to those of the above-described embodiments, so the description thereof is replaced with the description of the above-described embodiments.

110: casing 110a: low pressure part (suction space)
110b: high pressure part (discharge space) 110c: oil storage space
111: cylindrical shell 112: upper cap
113: lower cap 115: high and low pressure separator
115a: through hole 1151: sealing plate
1151a: high and low pressure through hole 116: support bracket
117: refrigerant suction pipe 118: refrigerant discharge pipe
120: drive motor 121: stator
1211: stator core 1212: stator coil
122: rotor 1221: rotor core
1222: permanent magnet 125: axis of rotation
1251: eccentric part 1252: oil feeder
1253: Oil Euro 130: Mainframe
131: main flange part 132: main bearing part
132a: bearing hole 133: turning space
134: scroll support part 135: Oldham ring receiving part
136: frame fixing part 136a: bolt fastening hole
137: guide bush 137a: bolt insertion hole
138: guide bolt 140: turning scroll
141: turning plate part 142: turning wrap
143: rotating shaft coupling part 150: non-orbiting scroll
151: non-orbiting neck plate portion 151a: discharge port
151b: bypass hole 151c: first back pressure hole
152: non-swiveling side wall portion 152a: inlet
152b: axial step surface (first step surface) 153: non-orbital wrap
155: guide protrusion 155a: guide insertion hole
1551a: suction guide groove 1551b: circumferential extension
1551c: circumferential step surface (second step surface) 157: discharge valve
160: back pressure chamber assembly 160a: back pressure chamber
161: back pressure plate 1611: fixed plate portion
1611a: second back pressure hole 1612: first annular wall portion
1612a: middle discharge port 1612b: valve guide groove
1612c: backflow prevention hole 1613: second annular wall portion
165: floating plate 171: main bearing
172: sub bearing 173: eccentric bearing
180: Oldham ring 190: Suction guide
190a: suction passage 190b: passage inlet
190c: passage exit portion 191: first side wall portion
191a: first fixing protrusion 192: second side wall portion
192a: second fixing protrusion 192b: suction hole
193: outer wall portion 193a: sealing extension portion
194: inner wall portion 195: upper wall portion
196: lower wall portion 197: suction extension portion
G1: first interval G2: second interval
S: suction guide space t1: upper wall thickness
t2: second side wall thickness V, V1, V2: compression chamber
V11: suction pressure chamber V12: intermediate pressure chamber
V13: discharge pressure chamber

Claims (16)

casing;
a high and low pressure separator separating the inner space of the casing into a low pressure part and a high pressure part;
a refrigerant suction pipe passing through the casing and communicating with the low pressure unit;
a refrigerant discharge pipe passing through the casing and communicating with the high-pressure unit;
a drive motor installed inside the low pressure unit;
a main frame provided on one side of the drive motor in an axial direction;
a pivoting scroll supported by the main frame in an axial direction and coupled to the drive motor by a rotational shaft to perform a pivoting motion;
The orbiting scroll is placed between the main frame and supported in the main frame in the axial direction to be movable in the axial direction with respect to the orbiting scroll, and is engaged with the orbiting scroll to form a compression chamber. A suction port is formed to penetrate the outer circumferential surface to communicate, a plurality of guide protrusions extending to the outer circumferential surface are formed, and a guide insertion hole is formed in the plurality of guide protrusions so that the guide bush supported by the main frame is slidably inserted in the axial direction, respectively. Each non-orbiting scroll formed;
a back pressure chamber assembly provided between the high and low pressure separation plate and the non-orbiting scroll, and being attached to and detached from the high and low pressure separation plate while moving in an axial direction together with the non-orbiting scroll to separate or connect the low-pressure part and the high-pressure part; and
A suction passage is provided to guide the refrigerant sucked into the low pressure portion to the compression chamber, and a passage inlet portion forming one end of the suction passage and opening toward the low pressure portion and forming the other end of the suction passage and opening toward the suction port form the refrigerant Including a suction guide having a passage outlet opening in a direction crossing the outlet end of the suction pipe,
The suction guide,
a first sidewall portion and a second sidewall portion respectively provided on both sides of the inlet in a circumferential direction;
an outer wall portion connecting an outer end of the first side wall portion and an outer end of the second side wall portion;
an inner wall portion connecting an inner end of the first side wall portion and an inner end of the second side wall portion;
an upper wall portion connecting the first side wall portion, the second side wall portion, and an upper end of the outer wall portion; and
A lower wall portion connecting the first side wall portion, the second side wall portion, and the lower end of the outer wall portion,
One of the plurality of guide protrusions is recessed by a predetermined depth from the outer circumferential surface toward the inner circumferential surface to form a suction guide groove in which the suction guide is accommodated,
A circumferential extension is formed stepwise on an inner circumferential side of the suction guide groove so that the first and second side walls of the suction guide are axially supported or the lower wall is axially supported. According to claim 1,
The circumferential extension,
A scroll compressor formed by connecting both inner surfaces in a circumferential direction of the guide protrusion forming the suction guide groove. According to claim 2,
The circumferential extension,
A scroll compressor formed narrower in a radial direction than the passage inlet. According to claim 2,
A suction port is formed on an outer circumferential surface of the non-orbiting scroll, and the suction port is formed to be eccentric in a circumferential direction with respect to the suction guide groove,
The first side wall portion or the second side wall portion,
A scroll compressor in which the suction guide groove is curved so as to extend in an eccentric direction with respect to the suction port. According to claim 1,
the outer wall,
A scroll compressor further comprising a sealing extension portion extending in a circumferential direction from an outer surface of the first sidewall portion and an outer surface of the second sidewall portion. casing;
a high and low pressure separator separating the inner space of the casing into a low pressure part and a high pressure part;
a refrigerant suction pipe passing through the casing and communicating with the low pressure unit;
a refrigerant discharge pipe passing through the casing and communicating with the high-pressure unit;
a drive motor installed inside the low pressure unit;
an orbiting scroll coupled to the drive motor through a rotation shaft to perform a orbital motion;
a non-orbiting scroll engaged with the orbiting scroll to form a compression chamber and having a suction port penetrating the outer circumferential surface so as to communicate with the compression chamber; and
A suction guide including a passage inlet portion forming one end of the suction passage and opening toward the low pressure portion and a passage outlet portion forming the other end of the suction passage and opening toward the suction passage to guide the refrigerant sucked into the low pressure portion to the compression chamber. do,
The suction guide,
a first sidewall portion and a second sidewall portion respectively provided on both sides of the inlet in a circumferential direction;
an outer wall portion connecting an outer end of the first side wall portion and an outer end of the second side wall portion;
an inner wall portion connecting an inner end of the first side wall portion and an inner end of the second side wall portion;
an upper wall portion connecting the first side wall portion, the second side wall portion, and an upper end of the outer wall portion; and
A lower wall portion connecting the first side wall portion, the second side wall portion, and the lower end of the outer wall portion,
The passage inlet portion is formed by opening at least a portion of the lower wall portion, and the passage outlet portion is formed by opening at least a portion of the inner wall portion.
A scroll compressor having a suction hole at least partially open to one of the first side wall and the second side wall and forming a part of the passage inlet. According to claim 6,
A stepped portion is formed on the outer circumferential surface of the non-orbiting scroll,
At least one of the first sidewall and the second sidewall has a fixing protrusion extending in a circumferential direction to be supported on the stepped portion of the non-orbiting scroll scroll compressor. According to claim 6,
A suction extension portion extending toward the driving motor from the first sidewall portion and the second sidewall portion is further provided,
The suction extension part,
A scroll compressor at least partially overlapping the outlet end of the refrigerant suction pipe in the axial and radial directions. According to claim 8,
The suction extension part,
A scroll compressor in which a second distance from an upper end in contact with the passage inlet to an inner circumferential surface of the casing is larger than a first distance from a lower end facing the drive motor to an inner circumferential surface of the casing. According to claim 8,
The suction extension part,
A scroll compressor that is inclined so as to gradually move away from the inner circumferential surface of the casing as it goes from a lower end facing the drive motor to an upper end in contact with the passage inlet. According to claim 6,
The thickness of the upper wall portion is formed thicker than the thickness of other portions except for the upper wall portion scroll compressor. delete According to claim 6,
The outer wall portion is formed in a curved surface so that the outer circumferential surface is in close contact with the inner circumferential surface of the casing. According to claim 6,
A main frame supporting the orbiting scroll is further provided between the drive motor and the non-orbiting scroll.
In the non-orbiting scroll, a plurality of guide protrusions supported by the main frame are formed at predetermined intervals along the circumferential direction,
A suction guide groove recessed from the outer circumferential surface toward the inner circumferential surface by a predetermined depth is formed on any one of the plurality of guide protrusions,
The suction guide,
A scroll compressor accommodated between both circumferential inner surfaces forming the suction guide groove. According to claim 14,
the outer wall,
A scroll compressor further comprising a sealing extension portion extending in a circumferential direction from an outer surface of the first sidewall portion and an outer surface of the second sidewall portion. The method of any one of claims 1 to 11 and 13 to 15,
The suction guide,
A scroll compressor formed of a material having a lower heat transfer coefficient than the non-orbiting scroll.

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