CN212389522U - Compressor - Google Patents

Abstract

The utility model relates to a compressor. The utility model discloses in, set up in high-pressure refrigerant space with the mode that surrounds the entry of the discharge pipe of discharge refrigerant, and inside form with the inner space of high-pressure refrigerant space connection. The inner space has a muffler device having a guide tube with a shape that is bent a plurality of times, one side of the guide tube being connected to the discharge tube, and the other side being open to the inner space. When the refrigerant is discharged, the refrigerant flows into the interior of the muffler device and then passes through the discharge pipe, and therefore, the interior of the muffler device becomes a noise damping space.

Description

Compressor

Technical Field

The present invention relates to a compressor, and more particularly, to a compressor provided with a muffler device to reduce noise in a path through which compressed refrigerant is discharged.

Background

In general, a compressor is a device for generating high pressure or delivering high pressure fluid, and when applied to a refrigeration cycle such as a refrigerator or an air conditioner, the compressor performs a function of compressing refrigerant gas and transferring the refrigerant to a condenser. Such compressors are classified into reciprocating compressors, rotary compressors, scroll compressors, and the like according to a method of compressing refrigerant gas.

Such a compressor compresses a refrigerant introduced into a compression chamber by a rotational force of a motor and discharges the refrigerant. The compressed refrigerant is collected to a high-pressure refrigerant space, which is an inner space of an upper casing corresponding to a kind of a cover, and then the compressed refrigerant is finally discharged to the outside through a discharge pipe and transferred to a condenser in a refrigeration cycle.

However, in the conventional compressor, when the refrigerant collected in the high-pressure refrigerant space is discharged through the discharge pipe, noise and vibration may occur. This is caused by the pressure in the high-pressure refrigerant space varying with the discharge time of the refrigerant, and corresponds to discharge pulsation. In particular, when a heating function is performed in a refrigeration cycle to which a compressor is applied, such noise and vibration may be more generated in a case where a refrigerant discharged from the compressor is not transmitted to an indoor unit via an outdoor unit.

In addition, oil may be mixed with the refrigerant discharged from the compressor and discharged together with the refrigerant. In particular, when the compressor is operated at a high speed, oil excessively flows into the high-pressure refrigerant space to increase the discharge amount of the oil, and there is a problem that the oil may deteriorate the performance of the compressor and a refrigeration cycle including the compressor. In order to solve this problem, an oil separating device may be provided outside the compressor, but it is difficult to miniaturize the compressor and the manufacturing cost of the compressor may increase.

Korean laid-open patent No. 10-2019-

SUMMERY OF THE UTILITY MODEL

The present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to reduce noise and vibration generated in a process of discharging refrigerant from a compressor.

Another object of the present invention is to reduce the discharge amount of oil discharged together with the refrigerant when discharging the refrigerant.

In accordance with the features of the present invention for achieving the above-described object, the present invention is provided in a high-pressure refrigerant space so as to surround an inlet of a discharge pipe for discharging a refrigerant, and an internal space connected to the high-pressure refrigerant space is formed inside the high-pressure refrigerant space. The inner space has a muffler device having a guide tube with a shape that is bent a plurality of times, one side of the guide tube being connected to the discharge tube, and the other side being open to the inner space. When the refrigerant is discharged, the refrigerant flows into the interior of the muffler device and then passes through the discharge pipe, and therefore, the interior of the muffler device becomes a noise damping space.

The utility model provides a compressor, a serial communication port, include: a casing to which a suction pipe for sucking a refrigerant and a discharge pipe for discharging the refrigerant are connected; a driving unit disposed inside the case, generating a rotational force; a compression unit disposed inside the casing, and rotating by receiving a rotational force of a driving unit through a rotational shaft, thereby compressing and discharging a refrigerant into a high-pressure refrigerant space between the discharge pipe and the driving unit; a muffler case provided in a part of the high-pressure refrigerant space, having an inner space formed therein, one side of the muffler case surrounding an inlet of the discharge pipe, and the other side of the muffler case having a suction hole connecting the inner space and the high-pressure refrigerant space; and a guide pipe provided in the internal space, one side of the guide pipe being connected to the discharge pipe, and the other side of the guide pipe being open to the inside of the internal space to guide the refrigerant to the discharge pipe.

The guide tube extends in a plurality of bends.

The muffler device includes: a muffler case coupled to an inner surface of the casing so as to surround an inlet of the discharge pipe, and having an inner space formed therein, and a suction hole penetrating the muffler case so as to connect the inner space to a high-pressure refrigerant space; and a guide pipe provided in the inner space, one side of the guide pipe being connected to an inlet of the discharge pipe, and the other side being open to the inside of the inner space, the guide pipe extending in a multi-turn form inside the inner space.

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

In addition, the muffler housing includes: a side surface portion having one side end surrounding the circumference of the inlet of the discharge pipe and coupled to the inner surface of the casing; and a bottom surface part connected to the side surface part, forming a bottom surface facing the driving unit to form an inner space together with the side surface part, and having a suction hole connected with the high pressure refrigerant space.

One side end of the guide pipe facing the inside of the inner space is opened in a direction different from a direction in which the suction hole of the muffler housing is opened.

One end of the guide pipe facing the interior space is positioned on a path where the suction hole of the muffler housing is opened, the guide pipe forms a discharge passage in a shape of being bent several times in its interior, and the bent portion is formed as a curved surface.

Here, the side face portion includes: a first plate and a second plate respectively disposed at both side ends of the side surface portion; and a pair of connection plates connected between the first plate and the second plate, wherein the connection portions of the first plate and the second plate and the connection plates extend in a curved or inclined manner.

The bottom surface portion of the muffler case may be spaced apart from the driving unit disposed inside the casing to secure an insulation space between the bottom surface portion of the muffler case and the driving unit, and the total length of the guide pipe is 70mm to 110mm under a condition that a discharge capacity of the compressor is 8.9cc to 10.2 cc.

The compressor of the present invention as described above has the following effects.

According to the present invention, a muffler device is provided in a high-pressure refrigerant space for discharging the refrigerant, and a discharge pipe for discharging the refrigerant to the outside extends in the muffler device. Therefore, when the refrigerant is discharged, the refrigerant flows into the interior of the muffler device first and then passes through the discharge pipe, so that the interior of the muffler device forms a damping space. With this structure, there are effects of reducing noise occurring in the process of discharging the refrigerant and improving the quality of the compressor.

Further, the discharge pipe is located inside the muffler device, and is bent many times to provide a sufficiently long discharge path, so that the oil mixed in the refrigerant can be separated while the refrigerant is discharged along the discharge pipe. In particular, the flow direction of the refrigerant and the oil flowing into the interior of the muffler device is changed a plurality of times, and thus the oil can be more effectively separated. As described above, when oil is sufficiently removed from the refrigerant, the efficiency of the compressor is improved.

In addition, the muffler device is coupled to an inner surface of a casing of the compressor, and is particularly provided to surround the discharge pipe. Such a muffler device reduces vibration and noise by increasing the weight around the discharge pipe, which is the main location where noise and vibration are generated due to pulsation, and also has the effect of preventing damage around a discharge pipe having a relatively weak strength due to compressed refrigerant.

Further, an inlet of a guide pipe extending from the discharge pipe and positioned inside the muffler device opens in a direction different from a direction in which a suction port of the muffler device into which the refrigerant flows opens. Therefore, the high-pressure refrigerant flowing into the muffler device through the suction hole can be prevented from immediately flowing into the guide pipe, whereby vibration and noise can be further reduced.

In addition, the muffler device of the present invention is not disposed outside the compressor but on the inner surface of the compressor, so that the size of the compressor is not increased, and the muffler device is disposed in an empty space inside the casing of the compressor, so that the muffler device can be added without changing the design of the conventional compressor.

Drawings

Fig. 1 is a sectional view showing an embodiment of a compressor according to the present invention.

Fig. 2 is a sectional view showing a side structure of a compression unit constituting an embodiment of fig. 1.

Fig. 3 is a sectional view showing a top structure of a compression unit constituting the embodiment of fig. 1.

Fig. 4 is a perspective view showing a structure of a muffler device constituting an embodiment of fig. 1.

Fig. 5 is a sectional view showing the internal structure of the muffler device shown in fig. 4.

Fig. 6 is a bottom view showing a lower structure of the muffler device shown in fig. 4.

Fig. 7A and 7B are bottom views showing different embodiments of the muffler housing constituting the muffler device in the present invention.

Fig. 8A and 8B are side views showing different embodiments of the guide pipe constituting the muffler device of the present invention in a cross-sectional state.

Wherein the reference numerals are as follows:

10: the casing 14: suction tube

15: a discharge pipe 20: drive unit

30: rotation shaft 50: compression unit

70: the muffler device 71: silencer casing

80: guiding tube

Detailed Description

In the following, some embodiments of the invention are explained in detail by means of exemplary drawings. Note that, when reference numerals are given to components in each drawing, the same components are denoted by the same reference numerals as much as possible even when they are denoted by different drawings. In describing the embodiments of the present invention, it is determined that specific descriptions of related well-known structures and functions will hinder understanding of the embodiments of the present invention, and detailed descriptions thereof will be omitted.

In addition, in describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), and the like may be used. The above terms are used only to distinguish the above-described constituent elements from other constituent elements, and the nature, order, or sequence of the respective constituent elements are not limited by the above terms. When it is stated that a certain constituent element is "connected", "coupled" or "in contact with" another constituent element, it is to be understood that the above-mentioned constituent element may be directly connected or coupled to the above-mentioned other constituent element, and another constituent element may also be "connected", "coupled" or "in contact with" each other constituent element.

According to the utility model discloses a compressor mainly includes: a casing 10, a driving unit 20, a compression unit 50, and a rotation shaft 30, and a muffler device 70 is provided at an upper portion of the driving unit 20 to reduce vibration and noise generated during the discharge of refrigerant. Hereinafter, this structure will be explained again.

For reference, hereinafter, a rotary compressor is exemplified, but the present invention may be applied to a scroll compressor or a swash plate compressor. That is, the present invention can be applied to various compressors including the driving unit 20 (motor), the rotating shaft 30 rotated by the driving unit 20, and the compressing unit 50 that changes the volume of the compression chamber by the rotating shaft 30.

First, the casing 10 forms an external appearance of the compressor, and is provided with an internal space therein. A plurality of components for operating the compressor are disposed in the inner space. The casing 10 includes: a cylindrical main body case 11 opened along the upper and lower sides, an upper case 13 covering the upper portion of the main body case 11, and a lower case 12 covering the lower portion of the main body case 11. The main body case 11 and the upper case 13 are welded and fixed to each other, and the main body case 11 and the lower case 12 are welded and fixed to each other.

The inner space has a driving unit 20 therein. The driving unit 20 generates a rotational force to rotate the rotational shaft 30. In the present embodiment, the driving unit 20 is disposed above the compressing unit 50, and conversely, the compressing unit 50 may be disposed above the driving unit 20.

The drive unit 20 is mainly composed of a rotor 23 and a stator 21. Here, the rotor 23 and the stator 21 are members that rotate relative to each other, the stator 21 is fixedly provided on the circumferential side within the casing 10, and the rotor 23 is rotatably provided inside the stator 21. Here, the stator 21 is formed by laminating a plurality of stator cores and coils wound around the stator cores. The stator 21 may be configured by a stator core and a coil wound around the stator core.

The stator 21 is fixed to an inner wall surface of the housing 10 by shrink fitting, and the rotary shaft 30 is inserted into a central portion of the rotor 23. The rotation shaft 30 transmits a rotation force to the roller 54 of the compression unit 50 while rotating together with the rotor 23. The rotary shaft 30 extends in the vertical direction of the compressor.

A suction pipe 14 is provided at one side of the casing 10, and a discharge pipe 15 is provided at a different side of the casing 10. The suction pipe 14 is a portion into which the refrigerant flows, and the discharge pipe 15 is a portion from which the compressed refrigerant is discharged. In this embodiment, the suction pipe 14 is located in the main body casing 11, and the discharge pipe 15 is located in the upper casing 13.

Looking at the compression unit 50, the compression unit 50 is for compressing and discharging refrigerant, and includes a cylinder 53, a roller 54, a vane 55, an upper cap 51, and a lower cap 52. The compression unit 50 compresses the sucked refrigerant and discharges the refrigerant. The refrigerant is sucked into and discharged from the cylinder 53 forming the compression spaces V1 and V2.

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

Fig. 2 is a longitudinal sectional view showing the structure of the compressing unit 50 in detail, and fig. 3 is a transverse sectional view. As shown in these figures, a roller 54 that rotates about the rotation shaft 30 is provided inside the cylinder 53. The roller 54 contacts the inner circumferential surface of the cylinder 53 and forms a compression chamber. The roller 54 is provided to rotate integrally with the rotating shaft 30. The roller 54 forms a contact point with the inner peripheral surface of the cylinder 53 and rotates.

The roller 54 includes a plurality of vane grooves 54a, 54b, 54 c. A vane 55 is provided in each of the vane grooves 54a, 54b, 54 c. The vane 55 is urged in the discharge direction by the pressure applied to the vane grooves 54a, 54b, and 54 c. If the rotary shaft 30 rotates, each vane 55 contacts the inner circumferential surface of the cylinder 53 and moves while rotating together with the roller 54, and a plurality of compression chambers are formed by the inner circumferential surface of the cylinder 53, the outer circumferential surface of the roller 54, and the vane 55. As shown, in the case where the vane 55 is three, i.e., the vanes 55a, 55b, 55c, three or four compression chambers are formed.

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

When the compression process of the compressing unit 50 is observed, first, if the rotating shaft 30 rotates in the counterclockwise direction as the driving unit 20 rotates, the roller 54 provided at the rotating shaft 30 rotates in the counterclockwise direction. As the roller 54 rotates in the counterclockwise direction, 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.

In addition, as the vane 55 moves, the interval between the outer peripheral surface of the roller 54 and the inner peripheral surface of the cylinder 53 becomes narrow, whereby compression can be formed. In the present embodiment, the compressor has a structure in which discharge pressure is applied to the entire inner space of the casing 10 except for the compression unit 50, and oil may be supplied to the journal portion of the rotary shaft 30 using the discharge pressure. As described above, the compressed refrigerant flows out through the discharge ports 53b and 53c, moves upward, and is delivered to the condenser through the discharge pipe 15. At this time, the refrigerant passes through the muffler device 70 of the present invention before passing through the discharge pipe 15.

The muffler assembly 70 is shown in detail in fig. 4-6. Referring to these drawings, it can be seen that the muffler device 70 is mainly composed of a muffler housing 71 and a guide pipe 80 provided therein. The muffler case 71 forms a skeleton of the muffler device 70, and as shown in fig. 4, projects downward from the bottom surface of the upper shell 13. More specifically, a muffler case 71 is provided on the bottom surface of the upper casing 13, and the driving unit 20 is located below the muffler case 71.

The muffler device 70 is provided in the high-pressure refrigerant space S1 so as to surround the inlet of the discharge pipe 15, and forms an internal space 71a therein connected to the high-pressure refrigerant space S1. Of the two side ends of the guide tube 80 located inside, one side end is connected to the discharge tube 15, and the other side end is open to the internal space 71 a. The refrigerant discharged from the compression unit 50 first flows into the high-pressure refrigerant space S1, then moves to the inner space 71a through the suction hole 72', and is delivered to the discharge pipe 15 via the guide pipe 80.

The muffler case 71 is coupled to the bottom surface of the upper casing 13 while surrounding the inlet of the discharge pipe 15, and has an internal space 71a formed therein. A suction hole 72' is formed through a lower side of the muffler housing 71 such that the internal space 71a is connected to the high-pressure refrigerant space S1. The muffler housing 71 is made of a thin flat plate of a metal material.

Looking at the structure of the muffler case 71, the muffler case 71 includes side surface portions 74, 75, 76 joined to the inner surface of the upper housing 13 while one side end surrounds the periphery of the inlet of the discharge pipe 15, and a bottom surface portion 72 connecting the lower portions of the side surface portions 74, 75, 76. Here, the bottom surface portion 72 forms a bottom surface facing the muffler housing 71 of the drive unit 20, and forms an internal space 71a together with the side surface portions 74, 75, 76. The suction hole 72' is opened in the bottom portion 72, and the internal space 71a is connected to the high-pressure refrigerant space S1.

The side surface portions 74, 75, and 76 are formed of a first plate 74, a second plate 76, and a connecting plate 75. The first plate 74 and the second plate 76 are portions disposed at both side ends of the side surface portions 74, 75, 76, and as shown in fig. 6, these outer surfaces are formed in a curved shape and have different radii of curvature from each other. In this embodiment, the first plate 74 has a diameter of 25mm to 35mm and the relatively small second plate 76 has a diameter of 14mm to 22 mm. The first plate 74 and the second plate 76 form the muffler housing 71 into an asymmetrical oval shape. As described above, although the side face portions 74, 75, 76 are divided into the first plate 74, the second plate 76, and the connecting plate 75, these plates are formed integrally to have outer surfaces continuous with each other.

The connecting plates 75 are configured as a pair, are connected between the first plate 74 and the second plate 76, and have a flat plate structure. Unlike this, the connecting plate 75 may have a curved surface structure or an inclined surface structure like the first plate 74 and the second plate 76. As described above, the side surface portions 74, 75, 76 of the muffler housing 71 have inner surfaces formed continuously by curved surfaces and flat surfaces, and the internal space 71a inside has no dead space, and can prevent generation of eddy currents due to the angular structure.

When viewing fig. 6, the muffler case 71 is symmetrical with respect to the a axis, but asymmetrical with respect to the B axis. This is because the muffler case 71 may be symmetrical with respect to the B-axis in consideration of the structure of the upper shell 13 in order to secure the maximum volume of the internal space 71a, depending on the structure of the upper shell 13 and the installation conditions of other components.

In contrast, as shown in fig. 7, the side surface portions 74, 75, and 76 may have a rectangular shape as a whole. The entire volume of the internal space 71a differs depending on the shape of the side surface portions 74, 75, 76, and the shape and area of the side surface portions 74, 75, 76 may also differ in consideration of the capacity and output of the compressor. For reference, in the present embodiment, the discharge capacity of the compressor is 8.9cc to 10.2cc, and the volume of the internal space 71 is 45cm³To 65cm³。

As shown in fig. 6, when the muffler case 71 is provided, the power supply connection portion C provided in the upper case 13 is avoided. The muffler housing 71 is preferably located at the center of the upper casing 13, and preferably has as large an area and a volume as possible while ensuring a predetermined insulation space between the bottom surface portion 72 of the muffler housing 71 and the drive unit 20. When a sufficient inner space 71a is secured, vibration and noise generated during the discharge of the refrigerant can be more effectively reduced.

The bottom surface portion 72 of the muffler housing 71 has a suction hole 72 ', and the suction hole 72' is opened toward the high-pressure refrigerant space S1. The high-pressure refrigerant space S1 and the inner 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, whereby the refrigerant discharged through the compression unit 50 can be smoothly supplied to the inner space 71 a.

Looking at fig. 6, the suction hole 72' of the present embodiment is offset to one side, rather than being located at the center of the bottom surface portion 72 (the point where the a axis and the B axis intersect). That is, more preferably, the suction hole 72' is located at the center of the high-pressure refrigerant space S1, not at the center of the bottom surface part 72. However, in the present embodiment, the suction hole 72' is opened at a position slightly deviated from the midpoint (K) of the high-pressure refrigerant space S1 in order to avoid interference with the power supply connection portion C.

The guide tube 80 is located in the inner space 71 a. The guide tube 80 is constructed as a tube (tube) and is made of a metallic material in this embodiment. The guide pipe 80 is disposed in the inner space 71a, and one side of the guide pipe 80 is connected to an inlet of the discharge pipe 15 and the other side is opened toward the inside of the inner space 71 a. That is, the guide tube 80 may be regarded as a part of the discharge tube 15.

In the present embodiment, the guide pipe 80 is not directly connected to the muffler case 71 but fixed to the bottom surface of the upper shell 13. The muffler case 71 is open toward the upper shell 13, and thus may be fixed to the bottom surface of the upper shell 13 by welding or the like in a manner of surrounding the guide pipe 80. In contrast, in the muffler case 71, the top surface facing the bottom surface of the upper case 13 may be covered with a flat top surface portion, and the guide pipe 80 may be fixed to the top surface portion.

The guide pipe 80 is used to guide the refrigerant flowing into the internal space 71a to the discharge pipe 15, and extends in the internal space 71a in a multi-turn manner as shown in fig. 4 and 5. If the guide pipe 80 extends in a curved form as described above, a sufficiently long spitting path (oil separating path) is provided, and oil mixed in the refrigerant can be separated during the refrigerant is discharged along the spitting path. In addition, as described above, oil is sufficiently removed from the refrigerant, thereby improving the efficiency of the compressor.

More specifically, the guide tube 80 includes: an inlet portion 81 having an inlet 81a opened toward the inner space 71a, a first bent portion 83 bent 90 degrees from the inlet portion 81 and extending upward, a second bent portion 85 bent 90 degrees again from the first bent portion 83 and formed in a shape of 'ㄈ', and a discharge portion 87 bent 90 degrees again upward from the second bent portion 85 and connected to the discharge pipe 15. An outlet 87a (see fig. 5) of the discharge portion 87 is connected to the discharge pipe 15.

Of course, these portions need not necessarily be bent 90 degrees therebetween, and may extend at various angles. For example, the shape from the inlet 81 to the discharge 87 constituting the guide pipe 80 may be curved to have an inclination angle with each other. In this case, the oil separated from the inside of the guide pipe 80 flows more smoothly downward, and may be discharged again to the inner space 71a through the inlet 81.

In addition, the curved portion of the guide tube 80 is formed as a curved surface. A first connection portion 82a is provided between the inlet portion 81 and the first curved portion 83, a second connection portion 82b is provided between the first curved portion 83 and the second curved portion 85, and a third connection portion 82c is provided between the second curved portion 85 and the discharge portion 87. These first to third connection portions 82a to 82c each smoothly extend in a curved form so that the refrigerant can flow more smoothly.

The inlet 81a opened at the inlet 81 faces a direction different from the direction in which the suction hole 72' of the muffler housing 71 is opened. More specifically, the suction hole 72' is opened in the vertical direction (X-axis direction), and the inlet 81a opened at the inlet 81 is opened in the horizontal direction (Y-axis direction) perpendicular to the vertical direction. That is, the suction hole 72' and the inlet 81a of the inlet portion 81 do not face each other. Accordingly, the high-pressure refrigerant flowing into the muffler device 70 through the suction hole 72' can be prevented from immediately flowing into the guide pipe 80, whereby vibration and noise can be further reduced.

However, in the present embodiment, the inlet 81a is located on a path where the suction hole 72' of the muffler housing 71 is opened. Viewing fig. 5, the inlet 81 is located on the X-axis which is the direction in which the suction hole 72' is opened. The inlet portion 81 is located at the center portion as much as possible, similarly to the suction hole 72', and thus the refrigerant can be more smoothly flowed in than the deflection edge.

Fig. 8 shows another example of the guide pipe 80, and as shown in fig. 8A, the inlet 81a opened in the inlet 81 may be opened upward, that is, toward the bottom surface of the upper housing 13, or as shown in fig. 8B, may be extended toward the bottom surface 72 of the muffler case 71 so as to be shifted from 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, and preferably, the length may be 70mm to 110mm under the condition that the discharge amount is 8.9cc to 10.2 cc. If the length of the guide pipe 80 is less than 70mm, oil mixed in the refrigerant cannot be sufficiently separated, and if it is greater than 110mm, it is difficult to secure a sufficient insulation space with the driving unit 20 because the entire size of the muffler device 70 becomes large.

Then, the refrigerant flows into the suction pipe by observing the flow of the refrigerant, is compressed in the compression chamber of the compression unit 50, and is discharged. Looking at the compression process, first, when the rotation shaft 30 rotates in the counterclockwise direction along with the rotation of the driving unit 20, the roller 54 provided at the rotation shaft 30 rotates in the counterclockwise direction, and the refrigerant flowing into the compression chamber of the cylinder 53 through the suction port 53a is located in the space formed between the inner circumferential surface of the cylinder 53 and each vane 55. In addition, as the vane 55 moves, the interval between the outer peripheral surface of the roller 54 and the inner peripheral surface of the cylinder 53 becomes smaller, so that compression can be formed.

The compressed refrigerant is discharged to the upper high-pressure refrigerant space S1. The high-pressure refrigerant is not immediately discharged from the discharge pipe 15 in the high-pressure refrigerant space S1, but passes through the muffler device 70. This is because the muffler device 70 surrounds the discharge pipe 15.

Looking at fig. 5, the refrigerant in the high-pressure refrigerant space S1 flows in the direction of arrow (r) through the suction hole 72' of the muffler device 70. Then, the inner space 71a is filled, and the suction hole 72' is located at the center of the bottom surface portion 72, so that the filling can be performed in all directions at the same time. In addition, the suction hole 72' is located at the center or a position near the center of the high-pressure refrigerant space S1, and thus, the refrigerant can flow in more smoothly.

The refrigerant filled in the inner space 71a flows to the inside of the guide pipe 80 through the inlet 81 of the guide pipe 80. (arrow @direction) when the refrigerant flows into the inlet part 81, since the pressure is varied with the inflow time of the refrigerant, pulsation may occur, but in the present invention, the guide pipe 80 is surrounded by the muffler case 71, thereby greatly reducing such vibration and noise.

The muffler housing 71 serves as a kind of muffler which sends out the refrigerant flowing in through the narrow suction hole 72' to the inner space 71a, which is a large space, to reduce vibration and noise. That is, as the volume becomes larger, the pressure of the gas is slightly lowered, thereby preventing vibration and noise. In addition, in the present embodiment, since the inlet 81a opened at the inlet 81 is shifted from the direction in which the suction hole 72 'of the muffler case 71 is opened, the high-pressure refrigerant flowing into the muffler device 70 through the suction hole 72' can be prevented from immediately flowing into the guide pipe 80, and thus vibration and noise can be further reduced.

In addition, in the process that the refrigerant flows inside the guide pipe 80 extended long, oil mixed in the refrigerant may be removed. The guide tube 80 provides a sufficiently long path through the curved structure so that oil can be more effectively removed.

The refrigerant from which the oil is removed in the process of passing through the guide pipe 80 is finally discharged in the direction of arrow (c) through the discharge pipe 15.

In the above, it is described that all the structural elements constituting the embodiments of the present invention are combined into one combination and action, but the present invention is not necessarily limited to these embodiments. That is, all the components may be selectively combined with one or more components and operated within the scope of the object of the present invention. In addition, the above terms "including", "constituting" or "having" and the like mean that corresponding structural elements may be built in, unless otherwise specifically stated, and thus it should be understood that other structural elements may be further included, not excluding other structural elements. Unless defined otherwise, all terms including technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art. Terms commonly used, such as terms defined in dictionaries, should be interpreted as having a meaning that is consistent with the context of the relevant art and should not be interpreted in an ideal or excessive form unless explicitly defined in the present invention.

The above description is only exemplary of the technical idea of the present invention, and various modifications and variations can be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to illustrate the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of the present invention should be construed by claims, and all technical ideas falling within the scope equivalent to the present invention should be construed as being included in the scope of the present invention.

Claims (10)

1. A compressor, comprising:

a casing to which a suction pipe for sucking a refrigerant and a discharge pipe for discharging the refrigerant are connected;

a driving unit disposed inside the case, generating a rotational force;

a compression unit disposed inside the casing, and rotating by receiving a rotational force of a driving unit through a rotational shaft, thereby compressing and discharging a refrigerant into a high-pressure refrigerant space between the discharge pipe and the driving unit;

a muffler case provided in a part of the high-pressure refrigerant space, having an inner space formed therein, one side of the muffler case surrounding an inlet of the discharge pipe, and the other side of the muffler case having a suction hole connecting the inner space and the high-pressure refrigerant space; and

and a guide pipe provided in the internal space, one side of the guide pipe being connected to the discharge pipe, and the other side of the guide pipe being open to the inside of the internal space to guide the refrigerant to the discharge pipe.

2. The compressor of claim 1,

the guide tube extends in a plurality of bends.

3. The compressor of claim 1,

the muffler housing is coupled to an inner surface of the casing, and the suction hole penetrates the muffler housing such that the internal space is connected to a high-pressure refrigerant space, the guide pipe is disposed in the internal space, one side of the guide pipe is connected to an inlet of the discharge pipe, and the other side of the guide pipe is opened toward the inside of the internal space, and the guide pipe extends in a multi-bent manner in the internal space.

4. The compressor of claim 3,

the suction hole of the muffler housing is open toward the high-pressure refrigerant space and open toward the center of the high-pressure refrigerant space.

5. The compressor of claim 3,

the muffler shell includes:

a side surface portion having one side end surrounding the circumference of the inlet of the discharge pipe and coupled to the inner surface of the casing; and

a bottom surface part connected to the side surface part, formed toward the bottom surface of the driving unit to form an inner space together with the side surface part, and having a suction hole connected to the high pressure refrigerant space.

6. The compressor of claim 2,

one side end of the guide pipe facing the inside of the internal space is opened in a direction different from a direction in which the suction hole of the muffler housing is opened.

7. The compressor of claim 6,

one side end of the guide pipe facing the inside of the internal space is positioned on a path where a suction hole of the muffler housing is opened.

8. The compressor of claim 2,

the guide pipe forms an oil separation path in the interior thereof in a shape of being bent a plurality of times, the bent portion of the guide pipe is formed as a curved surface, and the total length of the guide pipe is 70mm to 110mm under the condition that the discharge rate of the compressor is 8.9cc to 10.2 cc.

9. The compressor of claim 5,

the side surface portion includes:

a first plate and a second plate respectively disposed at both side ends of the side surface portion; and

a pair of connecting plates connected between the first plate and the second plate,

the portions where the first plate and the second plate and the connecting plate are connected to each other extend in a curved or inclined manner,

the bottom surface portion of the muffler case is spaced apart from the driving unit disposed inside the cabinet to secure an insulation space between the bottom surface portion of the muffler case and the driving unit.

10. The compressor of claim 1,

the guide pipe is formed in a shape bent a plurality of times, and extends gradually obliquely downward from a discharge portion where the refrigerant is discharged toward an inlet portion where an inlet into which the refrigerant flows is formed.

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