KR20210021876A - A compressor - Google Patents

Abstract

The present invention relates to a compressor. The present invention is installed in a high pressure refrigerant space to surround an inlet of a discharge pipe where a refrigerant is discharged and has an inner space connected to the high pressure refrigerant space. Moreover, a muffler device is formed in the inner space and has a guide pipe of which one side is connected to the discharge pipe and the other side is opened toward the inner space and which is bent multiple times. The refrigerant passes the discharge pipe after being introduced into the muffler device when the refrigerant is discharged, so that the inside of the muffler device is formed as a kind of a noise damping space.

Description

Compressor {A compressor}

The present invention relates to a compressor, and more particularly, to a compressor in which a muffler device for reducing noise is installed in a path through which a compressed refrigerant is discharged.

In general, a compressor is a machine used for generating high pressure or transporting high pressure fluid, and a compressor applied to a refrigeration cycle such as a refrigerator or an air conditioner performs a role of compressing refrigerant gas and transmitting it to a condenser. These compressors are classified into reciprocating compressors, rotary compressors, and scroll compressors according to a method of compressing refrigerant gas.

Such a compressor compresses and discharges the refrigerant introduced into the compression chamber using the rotational force of the motor. The compressed refrigerant is collected into the high-pressure refrigerant space, which is an inner space of the upper shell, which is a type of lid, and is finally discharged to the outside through a discharge pipe and transferred to the condenser of the refrigeration cycle.

However, in the conventional compressor, noise and vibration may occur when the refrigerant collected in the high-pressure refrigerant space is discharged through the discharge pipe. This is caused by fluctuations in the pressure in the high-pressure refrigerant space according to the discharge timing of the refrigerant and corresponds to discharge pulsation. Particularly, when the refrigeration cycle to which the compressor is applied performs a heating function, the refrigerant discharged from the compressor may be transmitted to the indoor unit without passing through the outdoor unit, so such noise and vibration may be generated even more.

In addition, oil is mixed with the refrigerant discharged from the compressor and discharged together. In particular, during high-speed operation of the compressor, oil is excessively introduced into the high-pressure refrigerant space, thereby increasing the amount of oil discharged, and such oil has a problem of deteriorating the performance of the compressor and the refrigeration cycle including the same. To solve this problem, an oil separation device may be installed outside the compressor, but it is difficult to downsize the compressor and increase the cost of manufacturing the compressor.

Republic of Korea Patent Publication No. 10-2019-0084515

The present invention is to solve the problems of the prior art as described above, and an object of the present invention is to reduce noise and vibration generated during the process of discharging a refrigerant from a compressor.

Another object of the present invention is to reduce the amount of oil discharged when the refrigerant is discharged.

According to a feature of the present invention for achieving the above object, the present invention is installed in the high-pressure refrigerant space so as to surround the inlet of the discharge pipe from which the refrigerant is discharged, and creates an internal space connected to the high-pressure refrigerant space therein. In the inner space, there is a muffler device in which a guide pipe connected to the discharge pipe on one side and open toward the inner space on the other side is bent multiple times. When the refrigerant is discharged, it first flows into the muffler device and then passes through the discharge pipe, so that the inside of the muffler device becomes a kind of noise damping space.

The muffler device is coupled to the inner surface of the case while surrounding the inlet of the discharge pipe, and an inner space is created therein, and a muffler housing through which a suction hole passes so that the inner space is connected to the high-pressure refrigerant space, and is installed in the inner space. One side is connected to the inlet of the discharge tube, the other side is opened toward the inside of the inner space, and includes a guide tube extending in a form bent a plurality of times inside the inner space.

The suction hole of the muffler housing is opened toward the high-pressure refrigerant space, but is opened toward the center of the high-pressure refrigerant space.

In addition, the muffler housing has a side portion coupled to the inner surface of the case while one end surrounds the inlet of the discharge pipe, and a bottom surface connected to the side portion and facing the driving unit to form an internal space together with the side portion and a high-pressure refrigerant space. It includes a bottom portion with a suction hole to be connected.

One end of the guide tube toward the inner space is opened in a direction different from the direction in which the suction hole of the muffler housing is opened.

One end of the guide tube toward the interior space is located on the path in which the suction hole of the muffler housing is opened, the guide tube is bent multiple times to create a discharge passage therein, and the bent portion is curved. Is made.

Here, the side portion includes a first plate and a second plate respectively disposed at both ends of the side portion, and a pair of connection plates connecting the first plate and the second plate, and the first plate and the second plate The portion where the connection plates are connected to each other extends in a curved or inclined surface.

The bottom portion of the muffler housing is spaced apart from the driving unit installed inside the case, so that an insulating space can be secured between the bottom portion of the muffler housing and the driving unit, and the total length of the guide tube is 8.9cc~10.2 of the discharge amount of the compressor. It is 70mm to 110mm in cc condition.

The compressor according to the present invention as shown above has the following effects.

According to the present invention, a muffler device is installed in a high-pressure refrigerant space in which refrigerant is discharged, and a discharge pipe for discharging the refrigerant to the outside is extended in the muffler device. Therefore, when the refrigerant is discharged, it first flows into the muffler device and then passes through the discharge pipe, so that the inside of the muffler device becomes a kind of damping space. Due to this structure, noise generated in the process of discharging the refrigerant is reduced, and the quality of the compressor is improved.

In addition, the discharge pipe is located inside the muffler device, and is bent a number of times to provide a sufficiently long discharge path, so that oil mixed with the refrigerant may be separated while the refrigerant is discharged along it. In particular, since the flow direction of the refrigerant and oil flowing into the muffler device changes several times, it is possible to more effectively separate the oil. As the oil is sufficiently removed from the refrigerant, the efficiency of the compressor is improved.

In addition, the muffler device is coupled to the inner surface of the case of the compressor, and is particularly installed in a form surrounding the discharge pipe. This muffler device not only reduces vibration and noise by increasing the weight around the discharge pipe where noise and vibration mainly occurs due to pulsation, but also prevents damage around the discharge pipe, which is relatively weak in strength, by the compressed refrigerant. There is also.

In addition, the inlet of the guide pipe extending from the discharge pipe and positioned inside the muffler device is opened in a direction that is different from the direction in which the suction hole of the muffler device into which the refrigerant flows is opened. Therefore, it is possible to prevent the high-pressure refrigerant flowing into the muffler device from directly flowing into the guide tube through the suction hole, thereby further reducing vibration and noise.

In addition, since the muffler device of the present invention is not installed outside the compressor but is installed on the inner surface of the compressor, the size of the compressor may not be greatly increased, and the muffler device is installed in an empty space inside the case of the compressor. It can also be added without design change.

1 is a cross-sectional view showing an embodiment of a compressor according to the present invention.
Figure 2 is a cross-sectional view showing a side structure of the compression unit constituting the embodiment of Figure 1;
Figure 3 is a cross-sectional view showing the planar structure of the compression unit constituting the embodiment of Figure 1;
Figure 4 is a perspective view showing the configuration of a muffler device constituting the embodiment of Figure 1;
Figure 5 is a cross-sectional view showing the internal structure of the muffler device shown in Figure 4;
Figure 6 is a bottom view showing the lower structure of the muffler device shown in Figure 4;
7(a) and 7(b) are bottom views showing different embodiments of a muffler housing constituting a muffler device in the present invention.
8(a) to 8(c) are side views showing different embodiments of a guide tube constituting a muffler device in a cross-sectional shape according to the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible, even if they are indicated on different drawings. In addition, in describing the embodiments of the present invention, if it is determined that a detailed description of a related known configuration or function obstructs the understanding of the embodiments of the present invention, the detailed description thereof will be omitted.

In addition, in describing the constituent elements of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are for distinguishing the constituent element from other constituent elements, and the nature, order, or order of the constituent element is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but between each component It should be understood that may be “connected”, “coupled” or “connected”.

The compressor according to the embodiment of the present invention largely includes a case 10, a drive unit 20, a compression unit 50, and a rotation shaft 30, and a muffler device 70 is disposed on the upper part of the drive unit 20. Therefore, it plays a role in reducing vibration and noise generated in the process of discharging the refrigerant. This structure will be described again below.

For reference, a rotary compressor is described below as an example, but the present invention can also be applied to a scroll compressor or a swash plate type compressor. That is, the present invention is applied to various compressors having a drive unit 20 (motor), a rotary shaft 30 rotated by the drive unit 20, and a compression unit 50 in which the volume of the compression chamber is variable by the rotary shaft 30. This is what can be applied.

First, the case 10 forms the exterior of the compressor, and has an internal space therein. Components for operating the compressor are installed in the inner space. The case 10 includes a cylindrical body shell 11 opened up and down, an upper shell 13 covering the upper portion of the body shell 11, and a lower shell 12 covering the lower portion of the body shell 11 ). The body shell 11 and the upper shell 13 and the body shell 11 and the lower shell 12 are fixed by welding to each other.

A drive unit 20 is located in the inner space. The drive unit 20 generates a rotational force and rotates the rotation shaft 30. In the present embodiment, the driving unit 20 is disposed relatively above the compression unit 50, and conversely, the compression unit 50 may be disposed above the driving unit 20.

The driving unit 20 is largely composed of a rotor 21 and a stator 23. Here, the rotor 21 and the stator 23 are parts that rotate relative to each other, the stator 23 is fixedly installed on the circumferential side of the case 10, and the rotor 21 is rotatably installed inside the stator 23 do. Here, the stator 23 is composed of a plurality of stacked stator cores and a coil wound around the stator core. Alternatively, the stator 23 may be composed of a stator core and a coil wound thereon.

The stator 23 is fixed to the inner wall surface of the case 10 in a shrink fit method, and a rotation shaft 30 is inserted into the central portion of the rotor 21. The rotation shaft 30 serves to transmit the rotational force to the roller 54 of the compression unit 50 while rotating together with the rotor 21. The rotation shaft 30 extends in the vertical direction of the compressor.

One side of the case 10 is provided with a suction pipe 14, and the other side of the case 10 is provided with a discharge pipe 15. The suction pipe 14 is a part through which the refrigerant is introduced, and the discharge pipe 15 is a part through which the compressed refrigerant is discharged. In this embodiment, the suction pipe 14 is in the body shell 11 and the discharge pipe 15 is in the upper shell 13.

Looking at the compression unit 50, the compression unit 50 compresses and discharges the refrigerant, and the cylinder 53, the roller 54, the vane 55, the upper cover 51 and the lower cover 52 ). The compression unit 50 compresses the sucked refrigerant and discharges it. The suction and discharge of the refrigerant are performed inside the cylinder 53 forming the compression spaces V1 and V2.

The compression unit 50 includes a suction port 53a through which the refrigerant is introduced, and a discharge port (not shown) through which the refrigerant compressed by the compression unit 50 is discharged. The suction port 53a communicates with an evaporator (not shown) through a suction pipe 14 forming a refrigeration cycle. And the discharge port is communicated to a condenser (not shown) through the discharge pipe (15). Reference numeral 57 denotes an inner space of the muffler installed in the compression unit 50.

2 is a longitudinal cross-sectional view showing the structure of the compression unit 50 in detail, and FIG. 3 is a cross-sectional view. As shown in these drawings, a roller 54 that rotates about a rotation shaft 30 is installed inside the cylinder 53. The roller 54 makes a compression chamber while in contact with the inner circumferential surface of the cylinder 53. The roller 54 is installed to rotate integrally with the rotation shaft 30. The roller 54 rotates while forming a contact point between the inner circumferential surfaces of the cylinder 53.

The roller 54 has a plurality of vane slots 54a, 54b, 54c. A vane 55 is installed in each of the vane slots 54a, 54b, 54c. The vane 55 receives a force in a direction derived by the pressure applied to the vane slots 54a, 54b, 54c. When the rotation shaft 30 rotates, each vane 55 rotates with the roller 54 and moves while in contact with the inner circumferential surface of the cylinder 53, and the inner circumferential surface of the cylinder 53 and the outer circumferential surface of the roller 54 and the vane 55 ) To create a plurality of compression chambers. As shown, when the number of vanes 55 is three (55a, 55b, 55c), three or four compression chambers are made.

The contact point between the cylinder 53 and the roller 54 is maintained at the same position, and the front end of the vane 55 moves along the inner circumferential surface of the cylinder 53, so that the pressure formed in each compression chamber is It has a mechanism that continuously compresses as it moves.

Looking at the compression process by the compression unit 50, first, when the rotation shaft 30 rotates counterclockwise as the drive unit 20 rotates, the roller 54 installed on the rotation shaft 30 is counterclockwise. Rotates. As the roller 54 rotates counterclockwise, the refrigerant flowing into the compression chamber of the cylinder 53 through the suction port 53a is located in a space formed between the inner circumferential surface of the cylinder 53 and each vane 55. .

Further, as the vane 55 moves, the distance between the outer circumferential surface of the roller 54 and the inner circumferential surface of the cylinder 53 is narrowed, and compression may be performed. In this embodiment, the compressor has a structure in which discharge pressure is applied to the entire inner space of the case 10 except for the compression unit 50, and oil may be supplied to the journal portion of the rotation shaft 30 by using the discharge pressure. The refrigerant compressed in this way flows out through the discharge ports 53b and 53c, moves upward, passes through the discharge pipe 15, and is transferred to the condenser. At this time, before passing through the discharge pipe 15, the refrigerant passes through the muffler device 70 constituting the present invention.

The muffler device 70 is shown in detail in FIGS. 4 to 6. Referring to these drawings, the muffler device 70 can be considered to be largely composed of a muffler housing 71 and a guide tube 80 installed therein. The muffler housing 71 makes the skeleton of the muffler device 70, which protrudes downward from the bottom of the upper shell 13 as shown in FIG. 4. More precisely, the muffler housing 71 is installed on the bottom surface of the upper shell 13, and the driving unit 20 is located below it.

The muffler device 70 is installed in the high-pressure refrigerant space S1 to surround the inlet of the discharge pipe 15, and creates an internal space 71a connected to the high-pressure refrigerant space S1 therein. And, one of the both ends of the guide pipe 80 in the inside is connected to the discharge pipe 15 and the other side is opened toward the inner space (71a). The refrigerant discharged from the compression unit 50 first flows into the high-pressure refrigerant space (S1), then moves to the internal space (71a) through the suction hole (72'), and passes through the guide pipe (80) to the discharge pipe (15). Is delivered.

The muffler housing 71 is coupled to the bottom of the upper shell 13 while surrounding the inlet of the discharge pipe 15, and an internal space 71a is formed therein. A suction hole 72' penetrates below the muffler housing 71 so that the inner space 71a is connected to the high-pressure refrigerant space S1. The muffler housing 71 is made of a thin plate of metal material.

Looking at the structure of the muffler housing 71, the muffler housing 71 has side portions 74,75,76 coupled to the inner surface of the upper shell 13 while one end of the muffler housing 71 wraps around the inlet of the discharge pipe 15 And, it is composed of a bottom portion 72 connecting the lower side of the side portions (74, 75, 76). Here, the bottom portion 72 forms a bottom surface of the muffler housing 71 facing the driving unit 20 to create an inner space 71a together with the side portions 74, 75, and 76. In addition, a suction hole 72' is opened in the bottom portion 72 so that the inner space 71a is connected to the high-pressure refrigerant space S1.

In addition, the side portions 74,75,76 are composed of a first plate 74, a second plate 76, and a connection plate 75. The first plate 74 and the second plate 76 are portions disposed at both ends of the side portions 74, 75, and 76, respectively. As shown in FIG. 6, their outer surfaces are curved and have different radius of curvature. Have. In this embodiment, the diameter of the first plate 74 is 25mm to 35mm, and the diameter of the relatively small second plate 76 is 14mm to 22mm. The first plate 74 and the second plate 76 make the muffler housing 71 asymmetrical elliptical shape. As described above, the side portions 74, 75, and 76 are divided into the first plate 74, the second plate 76, and the connection plate 75, but they are integrally configured to have an outer surface that is continuous with each other.

The connection plate 75 is composed of a pair connecting the first plate 74 and the second plate 76, and has a flat plate structure. Alternatively, the connection plate 75 may also have a curved or inclined structure like the first plate 74 and the second plate 76. In this way, the side portions 74,75,76 of the muffler housing 71 have a continuous inner surface in a curved surface and a plane, there is no dead space in the inner space 71a, and the occurrence of vortex due to the corner structure can be prevented. have.

6, the muffler housing 71 is symmetrical with respect to the A-axis, but is not symmetrical with respect to the B-axis. This is to secure the volume of the inner space 71a as much as possible in consideration of the structure of the upper shell 13, and the muffler housing 71 is based on the B axis according to the structure of the upper shell 13 and the installation conditions of other parts. It can also be symmetrical.

Alternatively, as shown in FIG. 7, the side portions 74, 75, and 76 may have a rectangular shape as a whole. Since the total removal of the internal space 71a varies according to the shape of the side parts 74, 75, and 76, the shape and area of the side parts 74, 75, and 76 may be different in consideration of the capacity and output of the compressor. For reference, in this embodiment, the discharge amount of the compressor is 8.9 cc to 10.2 cc, and the removal of the internal space 71a is 45 cm 3 to 65 cm 3.

As shown in FIG. 6, the muffler housing 71 is installed avoiding the power connection part C installed in the upper shell 13. The muffler housing 71 is preferably located in the center of the upper shell 13, and as long as a predetermined insulating space is secured between the bottom portion 72 of the muffler housing 71 and the driving unit 20, the wide area possible It is good to have a volume and a volume. When the internal space 71a is sufficiently secured, vibration and noise generated during the discharging process of the refrigerant can be more effectively reduced.

There is a suction hole 72' in the bottom portion 72 of the muffler housing 71, and the suction hole 72' opens toward the high-pressure refrigerant space S1. The high-pressure refrigerant space S1 and the internal space 71a are connected to each other through the suction hole 72'. The suction hole 72 ′ is preferably opened toward the center of the high-pressure refrigerant space S1, through which the refrigerant discharged through the compression unit 50 can be smoothly supplied to the internal space 71a.

6, the suction hole 72' of this embodiment is not in the center of the bottom part 72 (a point where the A-axis and B-axis meet), but is skewed to one side. That is, it is more preferable that the suction hole 72 ′ is located not at the center of the bottom portion 72 but at the center of the high-pressure refrigerant space S1. However, in this embodiment, the high-pressure refrigerant space (S1) is open at a position slightly out of the center (K), which is to avoid interference with the power connection (C).

A guide tube 80 is located in the inner space 71a. The guide tube 80 is a type of tube structure, and is made of a metal material in this embodiment. The guide tube 80 is installed in the inner space 71a, one side is connected to the inlet of the discharge tube 15 and the other side is opened toward the inside of the inner space 71a. That is, the guide pipe 80 may be viewed as a part of the discharge pipe 15.

In this embodiment, the guide pipe 80 is not directly connected to the muffler housing 71, but is fixed to the bottom surface of the upper shell 13. Since the muffler housing 71 is open in the direction of the upper shell 13, it may be fixed to the bottom surface of the upper shell 13 by welding or the like in a form surrounding the guide tube 80. Alternatively, in the muffler housing 71, the upper surface facing the bottom surface of the upper shell 13 is shielded by a flat upper surface portion, and the guide tube 80 may be fixed to the upper surface portion.

The guide pipe 80 serves to guide the refrigerant introduced into the internal space 71a to the discharge pipe 15, and is bent multiple times inside the internal space 71a as shown in FIGS. 4 and 5 Is extended in the form of When the guide tube 80 is extended in such a bent shape, a sufficiently long discharge path (oil separation path) is provided, so that oil mixed with the refrigerant may be separated while the refrigerant is discharged along it. And as the oil is sufficiently removed from the refrigerant, the efficiency of the compressor is improved.

More specifically, the guide pipe 80 has an inlet 81 having an inlet 81a open toward the inner space 71a, and a first bending extending upward by bending 90 degrees from the inlet 81 The second bent part 85 is bent 90 degrees from the part 83 and the first bent part 83 to form a'C' shape, and finally, the second bent part 85 is bent 90 degrees upward and discharged. It consists of a discharge portion 87 connected to the pipe (15). The outlet 87a (refer to FIG. 5) of the discharge part 87 is connected to the discharge pipe 15.

Of course, it is not necessary to bend between them by 90 degrees, and can be extended while having various angles. For example, from the inlet portion 81 to the outlet portion 87 constituting the guide pipe 80 may be bent so that they have an inclination angle to each other. In this case, the oil separated from the inside of the guide pipe 80 more smoothly flows downward, and can be discharged back to the internal space 71a through the inlet portion 81.

In addition, the portion bent in the guide tube 80 is made of a curved surface. There is a first connection part 82a between the inlet part 81 and the first bent part 83, and a second connection part 82b between the first bent part 83 and the second bent part 85, , There is a third connection portion 82c between the second bent portion 85 and the discharge portion 87. All of the first to third connecting portions 82a to 82c are smoothly extended in a curved shape to allow the refrigerant to flow more smoothly.

The inlet 81a opened to the inlet part 81 is shifted in a direction different from the direction in which the suction hole 72 ′ of the muffler housing 71 is opened. More precisely, the suction hole 72' is opened in the vertical direction (X-axis direction), and the inlet 81a opened to the inlet portion 81 is opened in the left-right direction (Y-axis direction) orthogonal thereto. . That is, the suction hole 72 ′ and the inlet 81a of the inlet 81 do not face each other. Therefore, it is possible to prevent the high-pressure refrigerant flowing into the muffler device 70 through the suction hole 72 ′ from directly flowing into the guide tube 80, thereby further reducing vibration and noise.

However, in this embodiment, the inlet 81a is located on a path in which the suction hole 72 ′ of the muffler housing 71 is opened. 5, the inlet 81 is located on the X-axis in the direction in which the suction hole 72' is opened. Since the inlet part 81 is located in the center of the suction hole 72 ′ as much as possible, the refrigerant can be smoothly introduced compared to the skewed edge.

In FIG. 8, other examples of the guide tube 80 are shown. As shown in FIG. 8(a), the inlet 81a opened to the inlet 81 is open upward, that is, toward the bottom of the upper shell 13 As shown in FIG. 8(b), it may be extended toward the bottom part 72 of the muffler housing 71 but out of the direction in which the suction hole 72' is opened.

The total length of the guide pipe 80 may vary depending on the discharge amount of the compressor, preferably 70mm to 110mm under the condition that the discharge amount is 8.9cc to 10.2cc. If the length of the guide pipe 80 is shorter than 70 mm, the oil mixed with the refrigerant cannot be sufficiently separated, and if it is larger than 110 mm, the overall size of the muffler device 70 is increased to secure a sufficient insulating space between the driving unit 20 It is difficult to do.

Next, looking at the flow of the refrigerant, the refrigerant is introduced into the suction pipe, compressed in the compression chamber of the compression unit 50 and discharged. Looking at the compression process, first, when the rotation shaft 30 rotates counterclockwise as the drive unit 20 rotates, the roller 54 installed on the rotation shaft 30 rotates counterclockwise, and the suction port 53a The refrigerant flowing into the compression chamber of the cylinder 53 through) is located in a space formed between the inner circumferential surface of the cylinder 53 and each vane 55. Further, as the vane 55 moves, the distance between the outer circumferential surface of the roller 54 and the inner circumferential surface of the cylinder 53 is narrowed, and compression may be performed.

The compressed refrigerant is discharged to the upper high-pressure refrigerant space (S1). The high-pressure refrigerant cannot be discharged directly from the high-pressure refrigerant space S1 to the discharge pipe 15 and passes through the muffler device 70. This is because the muffler device 70 surrounds the discharge pipe 15.

5, the refrigerant in the high-pressure refrigerant space (S1) flows in the direction of the arrow ① through the suction hole (72') of the muffler device (70). In addition, the internal space 71a is filled, and since the suction hole 72 ′ is located at the center of the bottom portion 72, it can be simultaneously filled in several directions. In addition, since the suction hole 72 ′ is located at or close to the center of the high-pressure refrigerant space S1, the refrigerant may be introduced more smoothly.

The refrigerant filling the inner space 71a flows into the guide pipe 80 through the inlet 81 of the guide pipe 80 (in the direction of arrow ②). When the refrigerant flows into the inlet 81, the refrigerant Although the pressure fluctuates according to the timing of the inflow of the pulsation and vibration may occur, in the present invention, since the guide tube 80 is wrapped around the muffler housing 71, such vibration and noise are greatly reduced.

The muffler housing 71 serves as a type of silencer, and the refrigerant introduced through the narrow suction hole 72' is discharged to the inner space 71a, which is a wide space, thereby reducing vibration and noise. In other words, as the volume increases, the pressure of the gas is slightly lowered to prevent vibration and noise. In addition, in this embodiment, the inlet 81a opened to the inlet 81 is shifted from the direction in which the suction hole 72 ′ of the muffler housing 71 is opened, so that the muffler device ( 70) It is possible to prevent the high-pressure refrigerant flowing into the guide tube 80 from flowing directly into the guide pipe 80, thereby further reducing vibration and noise.

In addition, oil mixed with the refrigerant may be removed while the refrigerant flows inside the guide tube 80 that is elongated. Since the guide tube 80 provides a sufficiently long path through the bent structure, oil can be removed more effectively.

The refrigerant from which oil has been removed while passing through the guide pipe 80 is finally discharged in the direction of arrow ③ through the discharge pipe 15.

In the above, even if all the constituent elements constituting the embodiment according to the present invention have been described as being combined into one or operating in combination, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all of the constituent elements may be selectively combined and operated in one or more. In addition, terms such as "include", "consist of" or "have" described above mean that the corresponding component may be present unless otherwise stated, excluding other components. It should not be construed as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art, unless otherwise defined, to which the present invention belongs. Terms generally used, such as terms defined in the dictionary, should be interpreted as being consistent with the meaning of the context of the related technology, and are not interpreted as ideal or excessively formal meanings unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

10: case 14: suction pipe
15: discharge pipe 20: drive unit
30: rotary shaft 50: compression unit
70: muffler device 71: muffler housing
80: guide tube

Claims (12)

A case in which a suction pipe for inhaling a refrigerant and a discharge pipe for discharging are connected,
A driving unit installed inside the case and generating a rotational force;
A compression unit installed inside the case and receiving the rotational force of the driving unit through a rotation shaft, compressing the refrigerant while rotating, and discharging the refrigerant into a high-pressure refrigerant space located between the discharge pipe and the driving unit;
A muffler housing installed in a part of the high-pressure refrigerant space and having an inner space inside, one side surrounding the inlet of the discharge pipe and the other side having a suction hole connecting the inner space with the high-pressure refrigerant space,
Compressor comprising a guide pipe installed in the inner space, one side connected to the discharge pipe and the other side opened toward the inner space to guide the refrigerant to the discharge pipe.
The compressor of claim 1, wherein the guide tube is bent multiple times.
The method according to claim 1, wherein the muffler housing is coupled to the inner surface of the case while surrounding the inlet of the discharge pipe, and an internal space is formed therein, and a suction hole penetrates so that the internal space is connected to the high-pressure refrigerant space, and the guide pipe A compressor installed in the inner space, one side connected to the inlet of the discharge pipe, the other side open toward the inner space, and extending in a form bent multiple times inside the inner space.
The compressor of claim 3, wherein the suction hole of the muffler housing is opened toward the high-pressure refrigerant space, but is opened toward the center of the high-pressure refrigerant space.
The method of claim 3, wherein the muffler housing
A side portion coupled to the inner surface of the case while one end wraps around the inlet of the discharge pipe,
A compressor comprising a bottom portion connected to the side portion and having a suction hole connected to the high-pressure refrigerant space by forming an inner space with the side portion by forming a bottom surface toward the driving unit.
The compressor of claim 2, wherein one end of the guide tube toward the inner space is opened in a direction different from a direction in which the suction hole of the muffler housing is opened.
The compressor of claim 6, wherein one end of the guide tube toward the interior space is located on a path in which the suction hole of the muffler housing is opened.
The compressor of claim 2, wherein the guide pipe is bent a plurality of times to form an oil separation path therein, and the bent portion is made of a curved surface.
The method of claim 5, wherein the side portion
A first plate and a second plate respectively disposed at both ends of the side portion,
It includes a pair of connection plates connecting between the first plate and the second plate,
The first plate, the second plate and the connecting plate are connected to each other portion is a compressor that extends in a curved or inclined surface.
The compressor of claim 9, wherein a bottom portion of the muffler housing is spaced apart from a driving unit installed inside the case to secure an insulating space between the bottom surface portion of the muffler housing and the driving unit.
The compressor of claim 2, wherein the guide pipe is formed in a shape that is bent a plurality of times, and gradually extends downwardly inclined toward an inlet where an inlet through which the refrigerant is introduced is formed from a discharge portion from which the refrigerant is discharged.
The compressor of claim 2, wherein the total length of the guide pipe is 70mm to 110mm under the condition that the discharge amount of the compressor is 8.9cc to 10.2cc.

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