CN115218569B

CN115218569B - Reservoir for compressor and compressor provided with same

Info

Publication number: CN115218569B
Application number: CN202210125305.XA
Authority: CN
Inventors: 金度亨; 张淇晥
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2021-04-20
Filing date: 2022-02-10
Publication date: 2024-03-22
Anticipated expiration: 2042-02-10
Also published as: US20220333601A1; KR20230030613A; EP4080140A1; KR20220144675A; CN115218569A; KR102591416B1

Abstract

The accumulator for a compressor according to the present invention includes: a shell which is configured outside the shell of the compressor and has a refrigerant accommodating space; a refrigerant connection pipe having one end connected to an outlet side of the evaporator and the other end connected to a refrigerant accommodating space of the casing; and a refrigerant suction pipe having one end communicating with the refrigerant accommodating space of the housing and the other end communicating with the suction side of the compressor, the refrigerant suction pipe being respectively fixable to a bottom surface and a top surface of the housing for forming the refrigerant accommodating space. Thus, the refrigerant suction pipe is fixed to the housing of the accumulator without providing an additional pipe holder, thereby reducing the vibration of the accumulator and reducing the manufacturing cost.

Description

Reservoir for compressor and compressor provided with same

Technical Field

The present invention relates to a liquid reservoir for a compressor and a compressor in which the liquid reservoir is provided outside a casing.

Background

In general, compressors can be classified into low-pressure compressors and high-pressure compressors according to a refrigerant connection relationship between a refrigerant suction pipe and a compression part. The low-pressure compressor is a system in which a refrigerant suction pipe is connected to the inner space of the casing and indirectly to the compression unit, and the high-pressure compressor is a system in which the refrigerant suction pipe penetrates the casing and is directly connected to the compression unit.

In the low pressure type compressor, as the refrigerant passing through the refrigerant suction pipe passes through the inner space of the casing, the liquid refrigerant and the gas refrigerant may be separated in the inner space of the casing. Thus, the low-pressure compressor may not provide an additional accumulator (accumulator) on the upstream side of the compression portion.

In the high pressure type compressor, since the refrigerant passing through the refrigerant suction pipe is directly supplied to the compression part, the liquid refrigerant may flow into the compression part together with the gas refrigerant. In this way, in the high-pressure compressor, the liquid refrigerant is suppressed from flowing into the compression portion by providing an additional accumulator on the upstream side of the compression portion.

In general, the accumulator is disposed eccentrically on one side of the compressor, a refrigerant connection pipe is provided at an upper end for constituting an inlet, and is connected to an outlet of the evaporator through a refrigerant pipe, and a refrigerant flow path pipe is provided at a lower end for constituting an outlet, and is fixed to the compressor through a refrigerant suction pipe. Furthermore, the middle of the reservoir is fixed to the compressor by a fixing bracket surrounding the reservoir.

Such a receiver may be formed such that the refrigerant connection pipe and the refrigerant flow path pipe are located on the same axis. However, in the case where the refrigerant connection pipe and the refrigerant flow path pipe are located on the same axis, the gas refrigerant and the liquid refrigerant passing through the refrigerant connection pipe may flow into the refrigerant flow path pipe in a state of not being sufficiently separated.

Patent document 1 (japanese laid-open patent No. S61-197968) discloses an example in which a refrigerant connection pipe and a refrigerant flow path pipe are located on the same axis, and a partition plate is provided between the refrigerant connection pipe and the refrigerant flow path pipe. This may shut off the direct flow of the liquid refrigerant into the refrigerant flow path tube, but since vibration of the compressor may damage the partition plate, it may be difficult to expect a long-term effect.

Patent document 2 (japanese laid-open patent No. 2013-119817) discloses an example in which an inlet of a refrigerant flow path pipe is bent so as not to face a refrigerant connection pipe. In patent document 2, the refrigerant flow tube is welded and fixed to the body of the accumulator. This can shut off the direct flow of the liquid refrigerant into the refrigerant flow path tube, and the refrigerant flow path tube is fixed to the body of the accumulator, so vibration of the refrigerant flow path tube can be canceled. However, in patent document 2, since the outer peripheral surface side of the refrigerant flow path tube is welded to the inner peripheral surface of the accumulator, the welding area is limited, and the refrigerant flow path tube may be separated from the accumulator, thereby increasing vibration and noise.

Patent document 3 (japanese laid-open patent publication No. 2011-169183) discloses an example in which a refrigerant flow path pipe and a refrigerant connection pipe are arranged on the same axis with a predetermined interval therebetween, and a filter screen is provided between the refrigerant flow path pipe and the refrigerant connection pipe. This can suppress the refrigerant passing through the refrigerant connection pipe from being separated into the gas refrigerant and the liquid refrigerant by the filter screen, and the liquid refrigerant flows into the refrigerant flow path pipe.

Patent document 3 discloses an example in which a refrigerant flow path tube is fixed to a main body of an accumulator by an additional pipe holder. This can suppress vibration and noise by fixing the refrigerant flow path tube by the pipe holder, but there is a possibility that the manufacturing cost is increased by adding an additional pipe holder.

In patent documents 1 to 3, since each refrigerant connection pipe is located on the axis of the accumulator, it is located away from the axis of the compressor, and thus vibration transmitted from the compressor is intensified, and vibration of the entire compressor including the accumulator may be increased.

In addition, in patent documents 1 to 3, since the refrigerant flow path pipes and the refrigerant connection pipes are arranged on the same axis or the refrigerant flow path pipes are arranged lower than the refrigerant connection pipes, the possibility of liquid refrigerant flowing into the compressor is high. For this reason, in these patent documents, a filter screen for separating liquid refrigerant among the refrigerant passing through the refrigerant connection pipe or a filter screen member similar thereto may be required. Furthermore, the refrigerant flowing into the refrigerant accommodating space of the accumulator from the refrigerant connection pipe is rapidly sucked into the adjacent refrigerant flow path pipe from the refrigerant connection pipe, so that noise of the compressor including the accumulator may be increased.

Disclosure of Invention

The invention aims to provide a liquid storage device for a compressor and a compressor with the liquid storage device, wherein the liquid storage device can reduce vibration and noise of the liquid storage device connected with one side of a compressor shell.

Further, an object of the present invention is to provide a compressor accumulator capable of stably fixing a pipe inserted into a refrigerant accommodating space of the accumulator even if a pipe holder is eliminated, and a compressor including the same.

Another object of the present invention is to provide a compressor receiver in which noise of a refrigerant moving from an evaporator to a compressor through a receiver can be reduced in the receiver, and a compressor including the same.

Another object of the present invention is to provide a liquid receiver for a compressor and a compressor including the same, which can effectively separate a liquid refrigerant from a refrigerant passing through the liquid receiver.

Further, an object of the present invention is to provide a compressor accumulator capable of delaying a flow rate of a refrigerant passing through the accumulator, and a compressor including the same.

Another object of the present invention is to provide a liquid storage device for a compressor and a compressor including the liquid storage device, in which a refrigerant passing through the liquid storage device flows in a spiral shape in a refrigerant storage space of the liquid storage device, thereby improving a separation effect of liquid refrigerant.

In order to achieve the object of the present invention, there is provided a compressor accumulator including a housing, a refrigerant connection pipe, and a refrigerant suction pipe. The case may be disposed outside the shell of the compressor, and may have a refrigerant accommodating space. One end of the refrigerant connection pipe may extend to the outside of the refrigerant accommodating space, and the other end may communicate with the refrigerant accommodating space. One end of the refrigerant suction pipe may communicate with the refrigerant accommodating space of the housing, and the other end may communicate with the suction side of the compressor. The refrigerant suction pipe may be fixed to a bottom surface and a top surface of the case for forming the refrigerant accommodating space, respectively. Thus, the refrigerant suction pipe is fixed to the housing of the accumulator without an additional pipe holder, thereby reducing the vibration of the accumulator and reducing the manufacturing cost.

As an example, a pipe fixing portion may be formed on the top surface of the case to insert and fix one end of the refrigerant suction pipe. This can firmly fix the upper end of the refrigerant suction pipe.

As another example, the pipe fixing portion may be recessed in a direction away from the refrigerant accommodating space along a longitudinal direction of the housing, whereby one end of the refrigerant suction pipe may be inserted into the pipe fixing portion. This makes it possible to easily weld and bond the refrigerant suction pipe to the case.

As another example, the pipe fixing portion may protrude toward the refrigerant accommodating space along the longitudinal direction of the housing and be inserted into one end of the refrigerant suction pipe. Thus, the refrigerant suction pipe can be stably fixed by forming the pipe fixing portion longer.

As another example, the pipe fixing portion may be formed as a pipe hole penetrating along a longitudinal direction of the case so that the refrigerant suction pipe penetrates the case and is fixed. This can improve the degree of freedom in manufacturing and assembling the plurality of members forming the housing.

As another example, the pipe fixing portion may be formed on an axial line of the housing. Thereby, the vibration amount transmitted from the compressor through the refrigerant suction pipe can be minimized.

As an example, the refrigerant suction pipe may be arranged to overlap the refrigerant connection pipe in the longitudinal direction of the casing. Thus, the distance between the outlet of the refrigerant connection pipe and the inlet of the refrigerant suction pipe can be increased while fixing both ends of the refrigerant suction pipe to both sides in the longitudinal direction of the casing.

As an example, the refrigerant suction pipe may be disposed on the axis of the casing, and the refrigerant connection pipe may be disposed eccentrically with respect to the axis of the casing. Thereby, the refrigerant suction pipe is fixed to the housing, and the refrigerant connection pipe can penetrate the top surface of the housing to communicate with the refrigerant accommodating space.

As another example, the refrigerant connection pipe may be disposed closer to the axial center of the compressor than the refrigerant suction pipe. This reduces vibration at the joint portion between the case and the refrigerant connection pipe.

As an example, the other end of the refrigerant connection pipe may be opened to the refrigerant accommodating space, and at least one or more refrigerant through holes communicating with the refrigerant accommodating space may be formed in the refrigerant suction pipe. The refrigerant through hole may be formed higher than or equal to the other end of the refrigerant connection pipe with respect to the longitudinal direction of the housing. Thus, the refrigerant can flow in the refrigerant accommodating space for a long time or a long distance, and the separation effect of the gas refrigerant and the liquid refrigerant can be improved.

As another example, the refrigerant through hole may be opened in a direction intersecting a direction in which the refrigerant suction pipe and the refrigerant connection pipe face each other. Thus, by further expanding the distance between the refrigerant connection pipe and the refrigerant suction pipe, the flow time and the long flow distance of the refrigerant can be ensured.

As an example, a filter (screen) member that filters foreign matter to be flowed into the refrigerant accommodating space may be coupled to the other end of the refrigerant connection pipe. Thus, the reliability of the compressor can be improved by suppressing the inflow of oil or foreign matter into the compression chamber.

As another example, the filter member may be formed of a mesh screen (mesh screen), and the mesh screen may be formed at or inserted into the other end portion of the refrigerant connection pipe, and a filter support portion for supporting the filter member may be provided in the refrigerant connection pipe. Thus, the refrigerant flows rapidly to the bottom surface of the refrigerant accommodating space via the refrigerant connection pipe.

As another example, the refrigerant connection pipe may include: a first guide portion extending in a longitudinal direction of the housing in the refrigerant accommodating space; and a second guide portion bent and extended from the first guide portion toward one direction or both directions. The filter screen member is inserted into the first guide portion and supported at a position where the second guide portion of the first guide portion is bent. Accordingly, the refrigerant flows to the side surface of the refrigerant accommodating space through the refrigerant connection pipe, and thus the liquid refrigerant and the gaseous refrigerant can be further effectively separated by the cyclone (cyclone) effect. In addition, the filter screen member can be stably supported without adding an additional support member, so that the manufacturing cost can be reduced and the reliability can be improved.

As an example, the housing may include: a main body having a lower end covered, the refrigerant suction pipe penetrating and coupled to the lower end of the housing, and an upper end of the main body being opened; and an upper cover (cap) that covers an upper end of the main body, the refrigerant connection pipe penetrating the upper cover. The upper cover may be formed with a pipe fixing portion in which one end of the refrigerant suction pipe is inserted and fixed, and a through hole may be formed at one side of the pipe fixing portion so that the refrigerant connection pipe is penetrated and coupled. Thus, even when the pipe holder is eliminated, both ends of the refrigerant suction pipe can be stably fixed to the case.

As another example, the pipe fixing portion may be formed at a center of the upper cover, and the through hole may be formed so as to be eccentric from the center of the upper cover toward an axial center side of the compressor. Accordingly, vibration caused by the refrigerant connection pipe can be reduced by bringing the refrigerant connection pipe closer to the compressor side.

As another example, the pipe fixing portion may be recessed from an inner surface of the upper cover for forming the refrigerant accommodating space toward an outer surface side of the upper cover. One end of the refrigerant suction pipe may be inserted into and fixed to the pipe fixing portion. Thus, even when no additional pipe holder is provided, the vibration of the accumulator can be reduced by fixing the refrigerant suction pipe to the case.

As another example, the through hole may be formed in the center of the upper cover, and the pipe fixing portion may be formed so as to be offset from the center of the upper cover toward the side closer to the axial center of the compressor or away from the axial center of the compressor. By this, the vibration caused by the refrigerant suction pipe can be reduced by bringing the refrigerant suction pipe closer to the compressor side.

As an example, the refrigerant suction pipe may include: a refrigerant flow path tube which is accommodated in a refrigerant accommodation space of the casing; and a refrigerant suction pipe having one end communicating with the refrigerant flow path pipe and the other end communicating with a suction side of the compressor. Both ends in the longitudinal direction of the refrigerant flow path tube may be fixed to both sides in the longitudinal direction of the casing, respectively. This reduces vibration caused by the refrigerant suction pipe, and can improve the degree of freedom in selecting the material for the connection member between the compressor and the accumulator.

As an example, the refrigerant suction pipe may be formed as a single pipe, one side of the refrigerant suction pipe may be fixed to the casing of the compressor, and the other side of the refrigerant suction pipe may be fixed to both sides of the casing in the longitudinal direction. This reduces the number of parts, lowers the manufacturing cost, and enables the refrigerant suction pipe to be easily and stably coupled.

In addition, in order to achieve the object of the present invention, there may be provided a compressor including a housing, an electric part, a compression part, and a reservoir. The inner space of the housing may be closed. The electric part may be disposed in an inner space of the housing. The compression unit may be provided in the inner space of the casing, and may be driven by the electric unit, thereby compressing the refrigerant and discharging the refrigerant to the inner space of the casing. The reservoir is disposed outside the housing and supported by the housing, and may penetrate the housing and be connected to the compression portion. Thus, most of the liquid refrigerant can be separated from the refrigerant sucked into the compressor by the evaporator, and the gas refrigerant is mainly sucked into the compressor.

Here, the accumulator may include a case, a refrigerant connection pipe, and a refrigerant suction pipe. The case may have a refrigerant accommodating space. One end of the refrigerant connection pipe extends to the outside of the refrigerant accommodating space, and the other end may communicate with the refrigerant accommodating space of the housing. One end of the refrigerant suction pipe communicates with the refrigerant accommodating space of the housing, and the other end may communicate with the suction side of the compressor. Thus, the refrigerant sucked into the refrigerant accommodating space through the refrigerant connection pipe can flow into the refrigerant suction pipe after circulating through the refrigerant accommodating space.

Further, at least a part of the refrigerant connection pipe and the refrigerant suction pipe may be overlapped in the axial direction and arranged in parallel to each other. Thus, the refrigerant connection pipe and the refrigerant suction pipe can be disposed at a distance from each other.

The refrigerant suction pipe may be fixed to a bottom surface and a top surface of the housing forming the refrigerant accommodating space, respectively. Thus, the refrigerant suction pipe can be firmly fixed to the housing of the accumulator without an additional pipe holder.

Drawings

Fig. 1 is a system diagram showing a refrigeration cycle apparatus to which the rotary compressor of the present embodiment is applied.

Fig. 2 is a front view showing a rotary compressor to which the accumulator of the present embodiment is applied.

Fig. 3 is a cross-sectional view of fig. 2.

Fig. 4 is a perspective view of the liquid reservoir of the present embodiment exploded and shown.

Fig. 5 is a perspective view of the assembled and illustrated reservoir of fig. 4.

Fig. 6 is a sectional view showing the inside of the reservoir in fig. 5.

FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 6.

Fig. 8A and 8B are graphs showing the vibration of the accumulator of the present embodiment compared with the vibration of the accumulator of the related art, fig. 8A is a graph showing the vibration change in the refrigerant connection piping, and fig. 8B is a graph showing the vibration change in the refrigerant suction piping.

Fig. 9A and 9B are graphs comparing and showing noise during cooling and heating of a compressor to which the accumulator of the present embodiment is applied with noise during cooling and heating of a compressor of the related art, fig. 9A is a graph showing noise during cooling of the present invention compared with that of the related art, and fig. 9B is a graph showing noise during heating of the present invention compared with that of the related art.

Fig. 10 is a perspective view showing another embodiment of the refrigerant connection piping of the present embodiment.

Fig. 11 is a sectional view taken along line XI-XI showing a process for explaining an embodiment of the refrigerant guiding tube in fig. 10.

Fig. 12 is a sectional view taken along line XI-XI showing another embodiment of the refrigerant guiding tube in fig. 10.

Fig. 13 is a cross-sectional view showing yet another embodiment of a reservoir.

Fig. 14 is a cross-sectional view showing still another embodiment regarding the reservoir.

Fig. 15 is a cross-sectional view showing yet another embodiment of a reservoir.

Fig. 16 is a cross-sectional view showing still another embodiment regarding a reservoir.

Detailed Description

Next, according to an embodiment shown in the drawings, the accumulator for a compressor and the compressor having the same according to the present invention will be described in detail.

For reference, the accumulator for a compressor of the present embodiment may be applied not only to a vertical type compressor in which a housing forming the appearance of the compressor is provided in the longitudinal direction, but also to a horizontal type compressor in which a housing is provided in the lateral direction. In addition, the accumulator for a compressor of the present embodiment can be applied not only to a rotary compressor in which a compression portion is formed by a rolling piston (or roller) and a vane, but also to a scroll compressor in which a compression portion is formed by a plurality of scroll plates engaged with each other. In addition, the accumulator of the present embodiment can be applied not only to the rotary compressor and the scroll compressor, but also to a compressor using an accumulator such as a high-pressure compressor in which a refrigerant suction pipe is directly connected to a compression portion. Hereinafter, a general rotary compressor in which a vane is inserted into a vane groove formed in a cylinder and is slidably contacted with an outer circumferential surface of a rolling piston (or a roller) will be described centering on the rotary compressor.

Referring to fig. 1, a refrigeration cycle apparatus to which the rotary compressor of the present embodiment is applied is configured such that a compressor 10, a condenser 20, an expander 30, an evaporator 40, and a receiver 50 form a closed loop. That is, the condenser 20, the expander 30, the evaporator 40, and the accumulator 50 are sequentially connected to the discharge side of the compressor 10, and the discharge side of the evaporator 40 is connected to the suction side of the compressor 10 through the accumulator 50. Thereby, a series of processes in which the refrigerant compressed in the compressor 10 is discharged to the condenser 20 side and the refrigerant passes through the expander 30, the evaporator 40, and the accumulator 50 in this order and is then sucked again to the compressor 10 is repeatedly performed.

However, in general, the accumulator 50 is disposed adjacent to the suction side of the compressor 10 and functions to separate liquid refrigerant from refrigerant to be sucked into the compressor 10, and thus the accumulator 50 may be understood as a part of the compressor, not as forming part of the refrigeration cycle apparatus.

Fig. 2 is a front view showing a rotary compressor to which the accumulator of the present embodiment is applied, and fig. 3 is a sectional view of fig. 2.

Referring to fig. 2 and 3, in the rotary compressor of the present embodiment, an electric part 120 is provided in an inner space 110a of a shell (shell) 110, and a compression part 130 is provided below the electric part 120, and the compression part 130 discharges a refrigerant into the inner space 110a of the shell 110 after sucking and compressing the refrigerant. The motor 120 and the compression 130 are mechanically connected by a rotating shaft 125.

The inner space of the case 110 is sealed, and a refrigerant suction pipe 532 is coupled to the lower half, and the refrigerant suction pipe 532 is connected to the outlet side of the accumulator 50 while constituting a part of a refrigerant suction pipe 53 described later. A refrigerant discharge pipe 113 connected to the condenser 20 is coupled to an upper portion of the casing 110. The refrigerant discharge pipe 113 is coupled to a rotary shaft 125 described below on the same axis.

The refrigerant suction pipe 532 penetrates the casing 110 and is directly connected to the suction port 1331 of the cylinder tube 133, and the refrigerant discharge pipe 113 penetrates the casing 110 and communicates with the internal space 110 a. Thus, the compressor forms a high-pressure compressor in which the discharge pressure is formed in the inner space 110a of the casing 110.

The aforementioned accumulator 50 is provided on the upstream side of the refrigerant suction pipe 532, i.e., between the evaporator 40 and the compressor 10. The reservoir 50 includes: a case (case) 51 having a refrigerant accommodating space 51a; a refrigerant connection pipe 52 penetrating the upper end of the casing 51 and communicating with the refrigerant accommodating space 51a; a refrigerant suction pipe 53 penetrating the lower end of the casing 51 and communicating with the refrigerant accommodating space 51 a. The reservoir 50 will be described again later.

The electromotive part 120 includes a stator 121 and a rotor 122. The electric part 120 may be understood as a general rotation motor or a driving motor.

The stator 121 is fixed to the inside of the housing 110, and the rotor 122 is rotatably inserted into the inside of the stator 121. Stator coil 1211 is wound around stator 121, and a permanent magnet (not shown) is inserted into rotor 122.. The rotary shaft 125 is press-fitted into and coupled to the center of the rotor 122.

The compression unit 130 includes a main bearing unit plate (hereinafter, referred to as a main bearing unit) 131, a sub bearing unit plate (hereinafter, referred to as a sub bearing unit) 132, a cylinder tube 133, a rolling piston 134, and a vane (vane) 135.

The main bearing portion 131 is fixedly coupled to the inner peripheral surface of the housing 110, and a sub-bearing portion 132 is provided below the main bearing portion 131 via a cylinder tube 133, and the sub-bearing portion 132 supports the rotary shaft 125 together with the main bearing portion 131. The main bearing portion 131 may be referred to as an upper bearing portion, and the sub-bearing portion 132 may be referred to as a lower bearing portion, as seen in the longitudinal direction.

The main bearing portion 131 includes: a main plate portion 1311 that covers the top surface of the cylinder tube 133 and forms a compression chamber V together with the cylinder tube 133; and a main boss portion 1312 extending from the main plate portion 1311 in the axial direction of the rotary shaft 125 and supporting the rotary shaft 125.

The main plate 1311 is formed in a disk shape, and its outer peripheral surface is press-fitted or welded to the inner peripheral surface of the housing 110. The main plate portion 1311 is formed with a discharge port 1313 for discharging the refrigerant compressed in the compression chamber V, and a discharge valve 1315 for opening and closing the discharge port 1313 is provided at an end portion of the discharge port 1313.

The sub-bearing portion 132 includes: a sub-plate portion 1321 forming a compression chamber V together with the cylinder tube 133; and a sub boss portion 1322 extending from the sub plate portion 1321 in the axial direction of the rotation shaft 125 and supporting the rotation shaft 125.

The sub-plate portion 1321 is formed in a circular plate shape, and is bolt-fastened to the main plate portion 1311 together with the cylinder tube 133, and a sub-support hole 1322a is formed in the sub-boss portion 1322, and the rotation shaft 125 penetrates and is supported by the sub-support hole 1322 a.

A cylinder tube 133 forming a compression chamber V together with the main bearing portion 131 and the sub bearing portion 132 is provided between the main bearing portion 131 and the sub bearing portion 132. The cylinder tube 133 is fixed to the main bearing portion 131 together with the sub-bearing portion 132 by bolt fastening.

The cylinder tube 133 is formed in a ring shape, a compression chamber V is formed in the cylinder tube 133 by the main bearing portion 131 and the sub bearing portion 132, a suction port 1331 penetrating from the outer circumferential surface to the inner circumferential surface is formed in one side of the cylinder tube 133, a vane groove 1332 is formed in one side of the suction port 1331, and the vane 135 is slidably inserted into the vane groove 1332.

The compression chamber V of the cylinder 133 is provided with a rolling piston 134, the rolling piston 134 is eccentrically coupled to the rotation shaft 125, and compresses the refrigerant while performing a swirling motion, and a vane 135 is slidably inserted into an inner circumferential surface of the cylinder 133, the vane 135 being in contact with the rolling piston 134 and dividing the compression chamber V into a suction chamber and a compression chamber together with the rolling piston 134.

The rolling piston 134 is formed in a ring shape, rotatably coupled to an eccentric portion (not numbered) of the rotation shaft 125, and the vane 135 is slidably inserted into a vane groove 1332 of the cylinder 133 to be in contact with an outer circumferential surface of the rolling piston 134. Accordingly, the compression chamber V of the cylinder tube 133 is divided into a suction space (not denoted by a reference numeral) communicating with the suction port 1331 and a discharge space (not denoted by a reference numeral) communicating with the discharge port 1313 by the vane 135.

A reference numeral 115, which is not illustrated in the drawings, denotes a fixing bracket, and 136 denotes a discharge muffler.

The rotary compressor of the present invention as described above operates as follows.

That is, when power is applied to the stator 121, the rotor 122 and the rotary shaft 125 rotate inside the stator 121 while the rolling piston 134 performs a swirling motion, and the volume of the suction space for forming the compression chamber V increases with the swirling motion of the rolling piston 134. Then, the refrigerant flows from the evaporator 40 into the refrigerant accommodating space 51a of the accumulator 50 communicating with the compression chamber V via the refrigerant connection pipe 52.

The refrigerant is separated into a gas refrigerant and a liquid refrigerant in the refrigerant accommodating space 51a of the accumulator 50, and the gas refrigerant is directly sucked into the compression chamber V through the refrigerant suction pipe 53, whereas the liquid refrigerant is gasified after being accumulated in the lower half of the refrigerant accommodating space 51a, and is sucked into the compression chamber V through the refrigerant suction pipe 53.

On the other hand, the refrigerant sucked into the compression chamber V is gradually compressed by the swirling motion of the rolling piston 134, and the refrigerant is discharged from the discharge space to the discharge muffler 136 through the discharge port 1313 provided in the main bearing portion 131, and then discharged to the internal space 110a of the casing 110. The refrigerant moves to the condenser 20 through the refrigerant discharge pipe 113, and then a series of processes of being sucked into the compression chamber V through the foregoing process are repeatedly performed.

At this time, the vibration of the compressor 10 is generated by the motor 120 and the compression unit 130, and the vibration generated in the compressor 10 is transmitted to the accumulator 50 via the refrigerant suction pipe 53 and the fixing bracket 115, and the vibration is transmitted to the refrigeration cycle apparatus via the refrigerant connection pipe 52 connected to the accumulator 50, so that noise of the outdoor unit including the refrigeration cycle apparatus may be increased. In view of this, in the related art, a pipe holder (not shown) for supporting the refrigerant suction pipe 53 is additionally provided inside the accumulator 50. However, as additional piping holders are provided, the number of parts and the number of assembly steps increase, and thus there is a possibility that the manufacturing cost of the reservoir 50 increases.

The refrigerant flowing into the refrigerant accommodating space 51a of the accumulator 50 through the refrigerant connection pipe 52 is rapidly sucked from the refrigerant accommodating space 51a into the refrigerant suction pipe 53 and moves to the compression chamber V of the compressor 10.

However, in the conventional art, since the refrigerant connection pipe 52 and the refrigerant suction pipe 53 are disposed on the same axis, the outlet of the refrigerant connection pipe 52 and the inlet of the refrigerant suction pipe 53 are close to each other, and thus the gas refrigerant and the liquid refrigerant cannot be sufficiently separated in the refrigerant accommodating space 51a, and a large amount of liquid refrigerant flows into the compression chamber V, which may reduce compression efficiency and reliability. Further, if the outlet of the refrigerant connection pipe 52 and the inlet of the refrigerant suction pipe 53 are close to each other, the refrigerant is rapidly sucked from the refrigerant connection pipe 52 into the refrigerant suction pipe 53, and suction noise in the refrigerant accommodating space cannot be attenuated, and thus noise of the outdoor unit including the compressor 10 and the accumulator 50 may increase.

In this way, in the present embodiment, by fixing both ends of at least one of the refrigerant connection pipe 52 and the refrigerant suction pipe 53 to both sides of the housing 51 constituting the accumulator 50, vibration of the accumulator 50 can be suppressed while eliminating the pipe holder. Further, by moving one of the refrigerant connection pipe 52 and the refrigerant suction pipe 53 adjacent to the compressor, vibration of the accumulator 50 can be further suppressed. Thereby, the manufacturing cost and vibration of the reservoir 50 can be reduced.

Further, by arranging the outlet of the refrigerant connection pipe 52 lower than the inlet of the refrigerant suction pipe 53, the separation effect of the gas refrigerant and the liquid refrigerant in the refrigerant accommodating space 51a can be improved, and the suction noise can be reduced.

Fig. 4 is a perspective view showing the reservoir of the present embodiment exploded, fig. 5 is a perspective view showing the reservoir of fig. 4 assembled, fig. 6 is a sectional view showing the inside of the reservoir of fig. 5, and fig. 7 is a sectional view taken along line "vii-vii" of fig. 6.

Referring to fig. 4 to 7, the accumulator 50 of the present embodiment includes a housing 51, a refrigerant connection pipe 52, and a refrigerant suction pipe 53. The casing 51 is disposed outside the compressor 10, and the refrigerant connection pipe 52 connects the outlet of the evaporator 40 and the inlet of the accumulator 50, while the refrigerant suction pipe 53 connects the outlet of the accumulator 50 and the suction side of the compressor 10. Thereby, the refrigerant flows from the evaporator 40 into the accumulator 50 through the refrigerant connection pipe 52, and is sucked into the compression chamber V of the compressor 10 through the refrigerant suction pipe 53.

Referring to fig. 4 and 5, the housing 51 includes a cylinder body 511 and an upper cover 512. The cylinder body 511 and the upper cover 512 may be respectively formed of steel (steel) material.

The cylinder body 511 may be formed of one cylinder body, or a plurality of cylinder bodies may be connected in the longitudinal direction to form one cylinder body. In this embodiment, an example in which one cylindrical body 511 is formed will be described mainly. In addition, the cylindrical body 511 only symbolically defines its shape, and does not need to be cylindrical. For example, it may be formed of a rectangular tub shape or the like.

The cylinder body 511 may be formed in a shape in which a lower end of both ends in a longitudinal direction (or an axial direction) is blocked and an upper end is opened. However, the lower end of the cylinder body 511 extends integrally from the side surface of the cylinder body 511 and is covered, and the first piping hole 511a may be formed through the center of the cylinder body 511 along the length direction of the housing 51 such that the refrigerant flow path tube 531 penetrates the first piping hole 511a. However, the lower end of the cylindrical body 511 may be formed in an open shape, as in the upper end. Hereinafter, a description will be given centering on the cylinder body 511 whose lower end is blocked.

The lower end of the cylinder body 511 may be formed in a downward hemispherical shape protruding downward. However, the lower end of the cylinder body 511 is not necessarily limited to a hemispherical shape. For example, the lower end of the cylinder body 511 may be formed flat, or may be in an upward hemispherical shape. However, the lower end of the cylindrical body 511 formed in a downward hemispherical shape is advantageous in terms of vibration as compared with the lower end of the cylindrical body 511 formed in a flat shape, and is easy to manufacture and advantageous in ensuring the volume of the refrigerant accommodating space 51a as compared with the upper hemispherical shape.

A first pipe hole 511a is formed in the lower end of the cylindrical body 511. The first pipe hole 511a is a hole through which a first end 531a of a refrigerant flow tube 531 constituting a part of the refrigerant suction pipe 53 described later is inserted and fixed to the housing 51.

For example, the first pipe hole 511a may be formed to penetrate the center of the lower end of the cylinder body 511. Thus, the refrigerant flow tube 531 may penetrate the center of the lower end of the cylindrical body 511 along the longitudinal direction of the case 51 and be coupled to the cylindrical body 511.

A first extension convex portion (not numbered) of a cylindrical shape surrounding the first piping hole 511a may be formed on the outer periphery of the first piping hole 511a. Thus, the first end 531a of the refrigerant flow tube 531 penetrating into and out of the first piping hole 511a can be welded to the first extension boss and can be stably supported.

The cylinder body 511 may be formed to have the same inner diameter along the length direction of the housing 51. However, the cylindrical body 511 may be formed such that its inner diameter varies along the length direction of the housing 51. For example, the cylindrical body 511 may be formed in a truncated cone shape in which the inner diameter thereof gradually increases toward the lower side. In this case, since the center of gravity is moved downward, it is advantageous in terms of vibration damping, and may also be advantageous in terms of the separation effect of the liquid refrigerant.

The cylinder body 511 may be fixed to the housing 110 of the compressor 10 by at least one fixing bracket 115. For example, in the case where the fixing bracket 115 is one, it may be advantageous in terms of vibration damping that the fixing bracket 115 supports the upper half of the cylinder body 511.

Referring to fig. 4 and 5, the upper cover 512 of the present embodiment may be formed in a flat circular plate shape as a whole. However, the upper cover 512 may be formed in a dome shape that is slightly convex upward, i.e., toward a direction away from the refrigerant accommodating space 51 a. Thus, not only noise can be reduced, but also moisture or rainwater generated in the outdoor unit of the refrigeration cycle apparatus and rainwater can be prevented from being accumulated on the top surface of the accumulator 50 to prevent corrosion and the like even if the moisture or rainwater is permeated in the outdoor unit.

The flat portion 512a is formed transversely in the central portion of the upper cover 512, and inclined surface portions 512b inclined downward may be continuously formed at both sides of the flat portion 512 a. A second pipe hole 512c is formed in one side of the flat portion 512a along the longitudinal direction of the housing 51. The second pipe hole 512c is a hole through which the refrigerant connection pipe 521 constituting a part of the refrigerant connection pipe 52 is inserted and connected. A second extension protrusion (not numbered) of a cylindrical shape extending along the outer periphery of the second pipe hole 512c may be formed on the outer side surface of the upper cover 512. Thus, the refrigerant connection pipe 521 inserted through the second pipe hole 512c can be welded to the second extension boss (not numbered) and can be stably supported.

The second pipe hole 512c may be formed eccentrically with respect to the axis CL2 of the reservoir 50, that is, the axis of the housing 51 or the center O of the upper cover 512. For example, the second pipe hole 512c may be formed so as to be offset to the side of the axial center CL1 of the compressor 10 to the maximum extent from the center O of the upper cover 512. As a result, the refrigerant pipe connected to the refrigerant connection pipe 52 is disposed near the compressor 10 as a vibration source, and the secondary vibration transmitted from the compressor 10 can be damped.

Referring to fig. 5 and 6, a pipe fixing portion 512d for inserting and fixing the refrigerant flow path tube 531 may be formed at the center O of the upper cover 512 constituting the center of the axis CL2 of the accumulator 50 or the center of the housing 51. For example, the pipe fixing portion 512d may extend from the outer side surface of the upper cover 512 in a direction away from the refrigerant accommodating space 51 a. In other words, the pipe fixing portion 512d may be recessed at a predetermined depth when viewed from the inner side surface of the upper cover 512. Thereby, the first end 531a of the refrigerant flow tube 531 is inserted into the pipe fixing section 512d and can be fixed by welding.

The insertion depth of the refrigerant flow tube 531 can be determined based on the height of the pipe fixing portion 512d. Thereby, the height of the pipe fixing portion 512d is made as high as possible, which may be advantageous in terms of the stability of the refrigerant flow path tube 531.

Referring to fig. 4 to 7, the refrigerant connection pipe 52 of the present embodiment may include a refrigerant connection pipe 521 and a refrigerant guide pipe 522. The refrigerant connection pipe 52 may extend in the longitudinal direction of the casing 51 in the refrigerant accommodating space 51a of the casing 51, and may be disposed parallel to the casing 51.

The refrigerant connection pipe 521 may be formed of the same material as a general refrigerant pipe, for example, a copper pipe (cooper pipe). However, the refrigerant connection pipe 521 may be formed of the same material as the upper cover 512, for example, a steel pipe (steel pipe), according to circumstances.

One end of the refrigerant connection pipe 521 is inserted into a second pipe hole 512c eccentric from the center of the upper cover 512, and may be welded to the second extension protrusion of the upper cover 512. The other end of the refrigerant connection pipe 521 extends toward the outside of the upper cover 512, i.e., away from the refrigerant accommodating space 51a, and can be connected to a refrigerant pipe extending from the outlet of the evaporator 40.

The refrigerant connection pipe 521 may be formed as a straight pipe having a length direction parallel to the housing 51. Thus, the refrigerant pipe may be connected at a position on the same axis as the refrigerant connection pipe 521, for example, at a position offset from the refrigerant suction pipe 53 toward the compressor 10. This can minimize the amount of vibration of the compressor 10 transmitted to the refrigerant piping.

Although not shown, one end of the refrigerant connection pipe 521, that is, the end connected to the refrigerant pipe may be bent so as to be positioned on the same axis as the refrigerant suction pipe 53. Thus, the refrigerant connection pipe 521 is connected to the housing 51 near the compressor 10, so that vibration of the accumulator 50 can be damped, and an existing production line for connecting the accumulator 50 and the refrigerant piping can be still used.

The refrigerant guide pipe 522 may be formed of the same material as the refrigerant connection pipe 521, for example, may be formed as a copper pipe. The refrigerant guide pipe 522 may be formed as a straight line pipe, and may be located on the same axis as the refrigerant connection pipe 521. For example, the refrigerant guide tube 522 may be formed in a cylindrical shape with both ends thereof open in the longitudinal direction of the housing 51, and a wall surface between both ends thereof is blocked.

In other words, a portion of the upper end of the refrigerant guiding pipe 522 may be enlarged and opened such that the lower end of the refrigerant connecting pipe 521 is inserted into the refrigerant guiding pipe 522. Thus, the lower end of the refrigerant connection pipe 521 may be inserted around the inner end of the second pipe hole 512c and welded to the upper end of the refrigerant guide pipe 522.

The lower end of the refrigerant guiding pipe 522 is formed to have substantially the same inner diameter as the refrigerant connection pipe 521, and may be opened toward the bottom surface of the refrigerant accommodating space 51 a. Thus, the filter mesh member composed of the mesh 523 is inserted into the refrigerant guide pipe 522, and the mesh 523 is formed as a mesh bundle (mesh bundle) made of metal, and can be welded to the refrigerant guide pipe 522.

Referring to fig. 6, a filter screen supporting portion 523a for supporting the mesh screen 523 may be formed inside the refrigerant guiding pipe 522. The filter screen supporting portion 523a may be formed in a stepped manner by winding in or inserting an additional ring such that the inner diameter of the refrigerant guiding pipe 522 is reduced. An example of inserting the ring into the refrigerant guiding tube 522 is disclosed in the present embodiment. Thus, the separation of the mesh 523 from the refrigerant guide pipe 522 can be suppressed, thereby improving reliability.

The lower end of the refrigerant guiding pipe 522 may extend to a substantially middle height of the cylinder body 511. The lower end of the refrigerant guide pipe 522 constitutes the outlet of the refrigerant connection pipe 52, and the refrigerant guide pipe 522 is formed to have a length as long as possible and to be close to the lower end of the cylinder body 511, which may be preferable in terms of improving the separation effect of the liquid refrigerant.

However, if the lower end of the refrigerant guide pipe 522 is too close to the bottom surface of the cylinder body 511, the length of the refrigerant guide pipe 522 is also increased accordingly, and thus may be susceptible to vibrations. Therefore, the length of the refrigerant guide pipe 522 may be preferably set so that the lower end of the refrigerant guide pipe 522 is located below the refrigerant through hole 531c described later and is less than or equal to the length extending from the upper end of the cylinder main body 511, that is, the upper cover 512, to approximately the middle height.

Although not shown, the other end of the refrigerant guide pipe 522 may be welded in contact with the bottom surface of the cylinder body 511, or may be inserted and coupled as a second end 531b of a refrigerant flow path pipe 531 described later by providing an additional pipe fixing portion 512 d. In this case, a refrigerant through hole (not shown) for constituting one type of refrigerant discharge hole may be formed in the middle of the refrigerant guide pipe 522 at a position lower than the refrigerant through hole 531c of the refrigerant flow path pipe 531.

Referring to fig. 4 to 7, the refrigerant suction pipe 53 of the present embodiment may include a refrigerant flow path pipe 531 and a refrigerant suction pipe 532. The refrigerant suction pipe 53 may extend in the longitudinal direction of the casing 51 in the refrigerant accommodating space 51a of the casing 51, and may be disposed parallel to the casing 51. Thus, the refrigerant suction pipe 53 may be disposed parallel to the refrigerant connection pipe 52, and at least a part of the refrigerant suction pipe 53 may be disposed so as to overlap the refrigerant connection pipe 52 in the longitudinal direction (or the axial direction) of the casing 51.

The refrigerant flow path tube 531 is formed as a straight line tube and may be located on the same axis as the center of the cylinder body 511. In other words, the first end 531a of the refrigerant flow path tube 531 may be located at the center of the lower end of the cylinder body 511, and the second end 531b may be located at the center of the upper cover 512.

Specifically, the first end 531a of the refrigerant flow path tube 531 may be inserted into and fixed to the first pipe hole 511a of the cylinder body 511, and the second end 531b of the refrigerant flow path tube 531 may be inserted into and fixed to the pipe fixing portion 512d of the upper cover 512. Thus, since both ends of the refrigerant flow path tube 531 are fixed to the housing 51, even if the refrigerant flow path tube 531 is connected to the compressor 10 via the refrigerant suction tube 532 described later, the secondary vibration of the refrigerant flow path tube 531 can be minimized.

The refrigerant flow path tube 531 may be formed of the same steel (steel) material as the case 51. Thereby, the first end 531a and the second end 531b of the refrigerant flow path tube 531 can be welded to the cylinder body 511 and the upper cover 512, respectively.

Although not shown, at least one of the two ends of the refrigerant flow tube 531 may further include an elastic member (not shown) such as rubber. For example, an elastic member may be inserted between the outer peripheral surface of the second end 531b of the refrigerant flow tube 531 and the inner peripheral surface of the pipe fixing portion 512d for inserting the second end 531b of the refrigerant flow tube 531, or an elastic surface (or an elastic layer) may be coated. In this case, the refrigerant flow tube 531 may be press-fitted to the upper cover 512 instead of being welded. In this case, therefore, the refrigerant flow path tube 531 may be formed of a material different from that of the upper cover 512, for example, a copper tube.

A refrigerant through hole 531c communicating with the refrigerant accommodating space 51a may be formed at an intermediate height of the refrigerant flow path tube 531, i.e., between the first end 531a and the second end 531 b. For example, the refrigerant through hole 531c may be formed higher than or equal to the lower end of the refrigerant guiding pipe 522 constituting the outlet of the refrigerant connection piping 52, or may be preferably located higher than the lower end of the refrigerant guiding pipe 522 by a preset height Δh.

In other words, the refrigerant flow tube 531 for constituting a part of the refrigerant suction pipe 53 may overlap with the refrigerant guide tube 522 for constituting a part of the refrigerant connection pipe 52 in the longitudinal direction (or the axial direction) of the housing 51. Thereby, the predetermined distance can be ensured between the outlet of the refrigerant connection pipe 521 and the inlet of the refrigerant flow path pipe 531.

Thereby, the refrigerant flowing into the refrigerant accommodating space 51a through the lower end of the refrigerant guiding pipe 522 swirls in the refrigerant accommodating space 51a and then moves to the refrigerant through hole 531c without directly moving to the refrigerant through hole 531c, so that the liquid refrigerant can be effectively separated from the gas refrigerant to be flowed into the refrigerant accommodating space 51 a.

However, the position of the refrigerant through hole 531c may be variously formed as needed. For example, the refrigerant through hole 531c is formed near the lower end of the refrigerant flow path pipe 531 to minimize the moving distance of the refrigerant in the refrigerant accommodating space 51a, or is formed far from the lower end of the refrigerant flow path pipe 531 to maximize the moving distance of the refrigerant in the refrigerant accommodating space 51 a. Thus, the frequency band for attenuating noise generated when the refrigerant is sucked can be arbitrarily adjusted while the suction amount of the refrigerant is appropriately adjusted.

In addition, one refrigerant through hole 531c may be formed to have a size smaller than or equal to an inner diameter or a sectional area of the refrigerant flow path tube 531. For example, the inner diameter or the sectional area of the refrigerant passing hole 531c may be formed to be greater than or equal to 0.5 times the inner diameter or the sectional area of the refrigerant flow path tube 531 and less than or equal to the inner diameter or the sectional area of the refrigerant flow path tube 531.

However, the size of the refrigerant through hole 531c may be variously formed as needed. For example, the sectional area of the refrigerant passing hole 531c may be formed to be larger than the inner diameter of the refrigerant flow path pipe 531 to minimize the flow path resistance of the refrigerant, or may be smaller than the inner diameter of the refrigerant flow path pipe 531 to minimize the amount of liquid refrigerant flowing to the compressor 10. Thus, the frequency band for attenuating noise generated when the refrigerant is sucked can be arbitrarily adjusted while the suction amount of the refrigerant is appropriately adjusted.

The refrigerant suction pipe 532 is generally formed in an L-shape, one end of which may be connected to the first end 531a of the refrigerant flow path pipe 531, and the other end of the refrigerant suction pipe 532 may penetrate the casing 110 of the compressor 10 and be connected to the suction port 1331. The refrigerant suction pipe 532 may be formed as a copper pipe or a steel pipe. For example, in the case where the casing 110 of the compressor 10 is provided with a connection member (not numbered) formed of a copper material, the refrigerant suction pipe 532 is formed of a copper pipe, and in the case where the connection member is formed of a steel material, the refrigerant suction pipe 532 may be formed of a steel pipe as well.

The reservoir 50 of the present embodiment as described above is more capable of damping vibration than existing reservoirs. Fig. 8A and 8B are graphs showing the vibration of the accumulator of the present embodiment compared with the vibration of the accumulator of the related art, fig. 8A is a graph showing the vibration change in the refrigerant connection piping, and fig. 8B is a graph showing the vibration change in the refrigerant suction piping.

Referring to fig. 8A, it can be seen that vibration in the refrigerant connection piping 52 for constituting one end of the accumulator 50 of the present embodiment is greatly reduced. That is, the vibration in the refrigerant connection piping 52 may gradually increase with an increase in the operating frequency (Hz), and in the related art (for example, patent document 3), it can be seen that the vibration increases from approximately 1000gal to approximately 2000gal when the operating frequency increases from 50Hz to 90 Hz. However, in the present embodiment, it can be seen that the vibration increases from about 1000gal only to 1500gal at the same operating frequency band. From this, it can be seen that the accumulator 50 of the present embodiment can greatly reduce vibration in the refrigerant connection piping 52, compared to the accumulator of the related art.

This is considered to be because the refrigerant connection pipe 52 is shifted (shift) and connected so as to be offset from the axial center CL2 of the accumulator 50 toward the axial center CL1 of the compressor 10, and thus the amplitude of the vibration transmitted from the housing 51 of the accumulator 50 to the refrigerant connection pipe 52 is attenuated.

Further, referring to fig. 8B, it can be seen that the vibration in the refrigerant suction pipe 53 constituting the other end of the accumulator 50 of the present embodiment is also greatly reduced. That is, the vibration in the refrigerant suction piping 53 of the related art may gradually increase with an increase in the operating frequency Hz. In other words, it can be seen that the vibration in the refrigerant suction piping 53 of the related art can be increased from approximately 1000gal to approximately 1400gal as the operating frequency increases from 50Hz to 90 Hz. However, in the present embodiment, the vibration is instead reduced from about 1000gal to 500gal at the same operating frequency band. Thus, the accumulator 50 of the present embodiment can further greatly reduce vibration in the refrigerant suction pipe 53, as compared with the accumulator 50 of the related art.

As described above, it can be considered that the vibration of the accumulator 50 is damped by the displacement of the axial center CL3 of the refrigerant connection pipe 52 and the connection to the compressor 10 side, and the vibration transmitted from the compressor 10 to the refrigerant suction pipe 53 is damped by the fixation of both ends of the refrigerant flow path pipe 531 constituting the refrigerant suction pipe 53 to the housing 51 of the accumulator 50.

In addition, the liquid reservoir 50 of the present embodiment can attenuate the inhalation noise as compared with the liquid reservoir of the related art.

Referring to fig. 9A, it can be seen that the compressor 10 to which the accumulator 50 of the present embodiment is applied has an effect of reducing noise during cooling, as compared with the related art (for example, patent document 3). That is, it can be seen that the noise of the compressor 10 of the present embodiment is about 52.5dB during the cooling operation at about 70rpm to 80rpm, whereas the noise of the compressor of the related art is about 53.8dB. From this, it can be seen that the noise of the compressor 10 to which the accumulator 50 of the present embodiment is applied is reduced by about 1.3dB during cooling, as compared with the prior art.

In contrast, referring to fig. 9B, it can be seen that the compressor 10 to which the accumulator 50 of the present embodiment is applied has a greater noise reduction effect during heating than during cooling, compared to the related art. That is, it can be seen that the noise of the compressor 10 of the present embodiment is about 51.3dB, whereas the noise of the compressor of the related art is about 53.0dB during heating operation at about 80rpm to 90 rpm. From this, it can be seen that the noise of the compressor 10 to which the accumulator 50 of the present embodiment is applied is reduced by about 1.7dB during heating, as compared with the prior art.

As described above, it can be said that the axial center CL3 of the refrigerant connection pipe 52 is shifted and connected to the compressor 10 side, and the both ends of the refrigerant flow path pipe 531 for constituting the refrigerant suction pipe 53 are fixed to the housing 51 of the accumulator 50, which also has an influence. In particular, in the present embodiment, the inlet of the refrigerant suction pipe 53 is arranged higher than the outlet of the refrigerant connection pipe 52, and thus the refrigerant flowing into the refrigerant accommodating space 51a of the accumulator 50 via the refrigerant connection pipe 52 can be guided to the refrigerant suction pipe 53 after circulating widely in the refrigerant accommodating space 51a, without being rapidly sucked into the refrigerant suction pipe 53. From this, it can be seen that this is because suction noise is effectively attenuated in the refrigerant accommodating space 51a of the accumulator 50.

In the present embodiment, the first end 531a of the refrigerant flow tube 531 constituting a part of the refrigerant suction pipe 53 is fixed to the lower end of the cylinder body 511, and the second end 531b of the refrigerant flow tube 531 is fixed to the upper cover 512 for covering the upper end of the cylinder body 511, whereby the refrigerant flow tube 531 can be stably fixed even without providing an additional pipe holder in the accumulator 50 of the present embodiment. Thereby, an increase in components such as the pipe holder can be suppressed, so that manufacturing costs can be reduced.

On the other hand, the case of another embodiment of the reservoir is as follows.

That is, in the foregoing embodiment, the refrigerant guide tube is formed as a straight tube, but may be formed as a bent tube according to circumstances.

Fig. 10 is a perspective view showing another embodiment of the refrigerant connection piping of the present embodiment, fig. 11 is a sectional view taken along line "XI-XI" showing an embodiment of the refrigerant guiding tube in fig. 10, and fig. 12 is a sectional view taken along line "XI-XI" showing another embodiment of the refrigerant guiding tube in fig. 10.

Referring to fig. 10 and 11, the accumulator 50 of the present embodiment includes a housing 51, a refrigerant connection pipe 52, and a refrigerant suction pipe 53. The basic configuration of the casing 51, the refrigerant connection pipe 52, and the refrigerant suction pipe 53 and their operational effects are similar to those of the foregoing embodiments.

However, in the present embodiment, the refrigerant guide pipe 522 for constituting a part of the refrigerant connection pipe 52 may be formed as a bent pipe, unlike the aforementioned straight pipe. For example, the refrigerant guide tube 522 of the present embodiment may be formed in an L-shaped tube, which is a tube having a lower half bent and an outlet opening toward the inner side of the cylinder body 511.

Specifically, the refrigerant guiding pipe 522 may include: a first guide 522a for constituting an inlet; and a second guide 522b for constituting an outlet. The first guide portion 522a is inserted into and coupled to the lower end of the refrigerant connection pipe 521, and the second guide portion 522b may extend in a lateral direction from the lower end or the middle of the first guide portion 522 a.

In this case, the mesh screen 523 is inserted into the first guide portion 522a, and the outlet of the second guide portion 522b may extend in the circumferential direction along the inner circumferential surface of the cylinder body 511. Preferably, the outlet end of the second guide portion 522b extends in a direction away from the refrigerant flow path tube 531.

As shown, the first guide portion 522a and the second guide portion 522b may be integrally formed, or may be separated from each other and assembled together, as the case may be. When the first guide portion 522a and the second guide portion 522b are integrally formed, the refrigerant guide tube 522 can be easily manufactured, and when the first guide portion 522a and the second guide portion 522b are assembled, the degree of freedom in shape design of the second guide portion 522b can be increased, for example, the second guide portion 522b can be formed in correspondence with the inner peripheral surface of the cylinder body 511, and the like.

The first guide 522a and the second guide 522b may be formed to have the same inner diameter, and may be formed to have different inner diameters according to circumstances. When the inner diameters are different, the second guide 522b is preferably formed to have an inner diameter smaller than that of the first guide 522a, so that the mesh screen 523 can be further stably supported.

The second guide portion 522b may extend from the lower end of the first guide portion 522a or may extend from the middle of the first guide portion 522 a. When the second guide 522b extends from the lower end of the first guide 522a, the flow resistance of the refrigerant can be reduced, and conversely, when the second guide 522b extends from the middle of the first guide 522a, the mesh screen 523 can be more stably held.

As described above, in the case where the lower half of the refrigerant guiding pipe 522 is bent so as to face the inner side surface of the cylinder body 511, the refrigerant passing through the refrigerant guiding pipe 522 and flowing into the refrigerant accommodating space 51a can rotate in a circular shape or a spiral shape along the inner peripheral surface of the cylinder body 511. Then, the refrigerant is rotated by receiving centrifugal force in the refrigerant accommodating space 51a, and a cyclone (cyclone) effect is generated, so that the separation effect of the gas refrigerant and the liquid refrigerant can be improved. Thus, the inflow of the liquid refrigerant into the compression chamber V can be further effectively suppressed. Furthermore, the separation effect of the liquid refrigerant and the gas refrigerant is improved as compared with the accumulator 50 of the same volume, and therefore the size of the accumulator 50 can be reduced, so that miniaturization of the accumulator 50 can be achieved, and further vibration can be reduced.

In addition, as shown in the present embodiment, in the case where the refrigerant guide pipe 522 is formed as a bent pipe, even if no additional welding work is performed after the mesh screen 523 is inserted into the refrigerant guide pipe 522, the mesh screen 523 can be suppressed from being detached from the refrigerant guide pipe 522. Thereby, reliability is improved by suppressing the mesh 523 from being detached from the refrigerant guide pipe 522, while manufacturing costs can be reduced by excluding welding work for fixing the mesh 523 to the refrigerant guide pipe 522.

In fig. 10, the second guide 522b is shown as being bent in a direction substantially perpendicular to the first guide 522a, but is not necessarily required to be bent in a perpendicular direction. For example, the outlet of the second guide 522b may be inclined downward by about 45 ° with respect to the first guide 522 a. In this case, the refrigerant discharged from the second guide portion 522b can move from the bottom surface of the case 51, that is, the refrigerant through hole 531c toward the bottom surface away from the refrigerant accommodating space 51a while swirling in a spiral shape, and the separation effect of the liquid refrigerant can be accordingly improved.

The second guide portions 522b1 and 522b2 in the present embodiment may be formed in plural numbers. For example, referring to fig. 12, the second guide portions 522b1, 522b2 may extend from the lower end of the first guide portion 522a toward the left and right sides, respectively. In other words, the refrigerant guide pipe 522 of the present embodiment may be formed in a T-shaped pipe shape by combining one first guide portion 522a and a plurality of second guide portions 522b1, 522b 2.

In this case, even if the refrigerant guide pipe 522 is bent, the flow resistance of the refrigerant discharged to the refrigerant accommodating space 51a is reduced by the outlets thereof being formed at both sides, so that it is possible to discharge to the refrigerant accommodating space 51a at a faster speed.

Further, since the refrigerant circulation pattern in the refrigerant accommodating space 51a becomes complicated because the outlets of the refrigerant guiding tube 522 are formed in plural numbers, collision between the refrigerants will increase, and the separation effect of the liquid refrigerant can be improved.

On the other hand, the case of still another embodiment of the reservoir is as follows.

That is, in the above-described embodiment, the pipe fixing portion protrudes upward from the upper cover, and the second end of the refrigerant flow path pipe is inserted into the pipe fixing portion, but the pipe fixing portion may protrude downward from the upper cover, as the case may be, and the pipe fixing portion is inserted into and fixed to the second end of the refrigerant flow path pipe.

Referring to fig. 13, the accumulator 50 of the present embodiment includes a housing 51, a refrigerant connection pipe 52, and a refrigerant suction pipe 53. The basic configuration of the casing 51, the refrigerant connection pipe 52, and the refrigerant suction pipe 53 and their operational effects are similar to those of the foregoing embodiments.

However, in the present embodiment, a pipe fixing portion 512d is formed in the center of the upper cover 512 for constituting a part of the casing 51, and the pipe fixing portion 512d may protrude downward toward the refrigerant accommodating space 51 a. Thereby, the second end 531b of the refrigerant flow tube 531 constituting a part of the refrigerant suction pipe 53 is fixed to the pipe fixing portion 512d of the upper cover 512, and the pipe fixing portion 512d can be inserted into and fixed to the second end 531b of the refrigerant flow tube 531.

In this case, the pipe fixing portion 512d and the refrigerant flow tube 531 may be welded and fixed, or may be press-fitted and fixed, or an additional elastic member (not shown) may be provided and inserted therein. This is the same as the previous embodiment, and therefore the detailed description thereof is replaced with the description of the previous embodiment.

As described above, in the case where the pipe fixing portion 512d protrudes (is recessed) toward the refrigerant flow path pipe 531, the height of the accumulator 50 is lower than the distance corresponding to the pipe fixing portion 512d in the foregoing embodiment, and therefore, it is not necessary to avoid the pipe fixing portion 512d at the time of assembling the refrigerant suction pipe 53, and therefore, the refrigerant suction pipe 53 can be assembled accordingly easily. Although not shown, when the refrigerant flow tube 531 is bent and provided at the axial center CL2 of the accumulator 50, the pipe fixing portion 512d does not protrude from the upper cover 512, and therefore, the refrigerant flow tube 531 can be easily provided at the axial center CL2 of the accumulator 50 by bending.

Further, by forming the pipe fixing portion 512d longer, the refrigerant flow tube 531 can be stably fixed. For example, in order to stably fix the second end 531b of the refrigerant flow tube 531, it is advantageous to form the length of the pipe fixing portion 512d as long as possible. However, in the case where the pipe fixing portion 512d protrudes to the outside of the upper cover 512, the protruding length of the pipe fixing portion 512d may be limited. In contrast, as in the present embodiment, when the pipe fixing portion 512d is recessed from the upper cover 512 into the refrigerant accommodating space 51a, there is no risk of collision with surrounding components even if the length of the pipe fixing portion 512d is formed long. Thereby, the second end 531b of the refrigerant flow path tube 531 can be further stably fixed.

However, as in the present embodiment, when the pipe fixing portion 512d protrudes into the refrigerant accommodating space 51a, the pipe fixing portion 512d is recessed from the outer side surface of the upper cover 512, and therefore, when installed outdoors, rainwater may accumulate in the pipe fixing portion 512d or the like, and corrosion may occur. For this reason, rainwater or foreign matter accumulation can be suppressed by inserting the cover into the pipe fixing portion 512d recessed from the outer side surface of the upper cover 512.

That is, in the above-described embodiment, the pipe fixing portion for fixing the second end of the refrigerant flow path pipe is formed in the upper cover, but a pipe hole for passing the refrigerant flow path pipe may be formed in the upper cover as the case may be.

Referring to fig. 14, the accumulator 50 of the present embodiment includes a housing 51, a refrigerant connection pipe 52, and a refrigerant suction pipe 53. The basic structure of the case 51, the refrigerant connection pipe 52, and the refrigerant suction pipe 53 and the operational effects thereof are similar to those of the foregoing embodiments.

However, in the present embodiment, the third pipe hole 512e is formed to penetrate the center O of the upper cover 512 along the longitudinal direction of the housing 51, and the second end 531b of the refrigerant flow tube 531 may be welded to the third pipe hole 512e through the third pipe hole 512e. In this case, the second end 531b of the refrigerant flow path tube 531 may be covered by fitting an additional cover member 533 over the second end 531b.

As described above, when the second end 531b of the refrigerant flow tube 531 penetrates the upper cover 512 and is externally covered, an error in the assembly length of the refrigerant flow tube 531 can be allowed to increase. Thus, when the refrigerant flow channel tube 531 is assembled, the upper cover 512 can be stably assembled to the cylindrical body 511 even if the length of the refrigerant flow channel tube 531 increases due to a machining error or the like.

In other words, as in the above-described embodiment, when the pipe fixing portion 512d is formed in the upper cover 512 and the refrigerant flow tube 531 is inserted into the pipe fixing portion 512d, the length of the refrigerant flow tube 531 and the height of the pipe fixing portion 512d must be precisely machined. If the length of the refrigerant flow path tube 531 is longer than the height of the pipe fixing portion 512d, the upper cover 512 may hang from the cylinder body 511, and in the opposite case, the refrigerant flow path tube 531 may not be stably inserted into the pipe fixing portion 512d.

However, in the case where the refrigerant flow path tube 531 penetrates the upper cover 512 as in the present embodiment, assembly failure between the refrigerant flow path tube 531 and the upper cover 512 due to machining errors can be prevented in advance by forming the length of the refrigerant flow path tube 531 long.

That is, in the above-described embodiment, the refrigerant suction pipe is located at the axial center of the accumulator, and the refrigerant connection pipe is displaced from the axial center of the accumulator toward the axial center side of the compressor, but the positions of the refrigerant suction pipe and the refrigerant connection pipe may be opposite to each other according to circumstances.

Referring to fig. 15, the accumulator 50 of the present embodiment includes a housing 51, a refrigerant connection pipe 52, and a refrigerant suction pipe 53. The basic structure of the case 51, the refrigerant connection pipe 52, and the refrigerant suction pipe 53 and the operational effects thereof are similar to those of the foregoing embodiments.

However, in the present embodiment, the refrigerant connection pipe 52 penetrates the center O of the upper cover 512 and is coupled to the upper cover 512, and the axial center CL4 of the refrigerant suction pipe 53 may be provided so as to be offset from the center O of the upper cover 512 toward the compressor 10. For example, the refrigerant guide pipe 522 for constituting a part of the refrigerant connection pipe 52 is inserted to a substantially middle height of the cylinder body 511 for constituting the refrigerant accommodating space 51a, and both ends of the refrigerant flow path pipe 531 for constituting a part of the refrigerant suction pipe 53 may be welded to the lower end of the cylinder body 511 and the upper cover 512, respectively, and fixed.

Specifically, in the upper cover 512 of the present embodiment, the second pipe hole 512c is formed in the center O thereof, whereby the refrigerant connection pipe 521 for constituting a part of the refrigerant connection pipe 52 can be inserted into the second pipe hole 512c along the axis CL2 of the accumulator 50. Thus, as in the previous embodiments, the upper cover 512 may be formed in a hemispherical or dome shape with a convex center portion.

However, in the present embodiment, the pipe fixing portion 512d is formed in the upper cover 512, whereby the second end 531b of the refrigerant flow tube 531 is fixed to the pipe fixing portion 512d, and the pipe fixing portion 512d may be formed so as to be offset from the center of the upper cover 512 toward the compressor 10.

In addition, a first pipe hole 511a is formed at the lower end of the cylindrical body 511 of the present embodiment, and the first pipe hole 511a may be located at a position eccentric to the axial center CL2 of the reservoir 50, for example, between the axial center CL1 of the compressor 10 and the axial center CL2 of the reservoir 50. Thus, as in the foregoing embodiment, the position of the bottom surface of the cylindrical body 511 corresponding to the axis CL2 of the reservoir 50 may be formed in a hemispherical or dome shape with a convex edge, but a part or all of the bottom surface of the cylindrical body 511 in which the first piping hole 511a is formed may be formed in a flat plate shape.

As described above, the refrigerant connection pipe 52 of the accumulator 50 of the present embodiment penetrates the axial center CL2 of the accumulator 50 and is connected to the accumulator 50, whereby the existing outdoor unit line can still be used, and thus the connection between the compressor 10 and the evaporator 40 can be made easy.

In addition, the refrigerant suction pipe 53 of the accumulator 50 of the present embodiment is shifted from the axial center CL2 of the accumulator 50 toward the compressor 10 and connected to the accumulator 50, whereby the length L1 in the radial direction of the refrigerant suction pipe 532 constituting a part of the refrigerant suction pipe 53 is shortened. Thereby, the vibration transmitted from the compressor 10 via the refrigerant suction pipe 53 can be further damped as compared with the foregoing embodiment.

That is, in the foregoing embodiment, the refrigerant suction pipe is formed by assembling the refrigerant flow path pipe and the refrigerant suction pipe, but the refrigerant flow path pipe and the refrigerant suction pipe may be integrally formed as the case may be.

Referring to fig. 16, the accumulator 50 of the present embodiment includes a housing 51, a refrigerant connection pipe 52, and a refrigerant suction pipe 53. The basic structure of the case 51, the refrigerant connection pipe 52, and the refrigerant suction pipe 53 and the operational effects thereof are similar to those of the foregoing embodiments.

However, the refrigerant suction pipe 53 of the present embodiment may be formed of a single pipe. For example, the refrigerant suction pipe 53 may be formed of one refrigerant flow path pipe 531, one end of the refrigerant flow path pipe 531 is fixed to the housing 110 of the compressor 10, and the other end of the refrigerant flow path pipe 531 may be inserted through the first pipe hole 511a of the cylinder body 511 and fixed to the pipe fixing portion 512d of the upper cover 512.

In this case, the refrigerant flow path pipe 531 for constituting the refrigerant suction pipe 53 may be formed as a steel pipe such as the cylindrical body 511 or the upper cover 512 of the accumulator 50, or may be formed as a copper pipe such as a connection member welded to the housing 110 of the compressor 10.

However, since it is necessary to perform welding in a state where the second end 531b of the refrigerant flow tube 531 is inserted into the pipe fixing portion 512d of the upper cover 512, it is advantageous in terms of the assembly process that the refrigerant flow tube 531 is formed of the same material as the accumulator 50 as much as possible.

As described above, in the case where the refrigerant suction pipe 53 is formed of one refrigerant flow path pipe 531, the number of assembly steps can be reduced and the manufacturing cost can be reduced as compared with the case where the refrigerant suction pipe 53 is formed of the refrigerant flow path pipe 531 and the refrigerant suction pipe 532 and assembled.

Further, since the refrigerant suction pipe 53 is integrally formed, even if vibration of the compressor 10 is transmitted through the refrigerant suction pipe 53, the refrigerant suction pipe 53 is less likely to be damaged, and thus reliability can be improved.

On the other hand, although not shown, the reservoir 50 is formed in a shape in which the upper end of the cylinder body 511 is blocked and the lower end thereof is opened and covered with an additional lower cover (not shown), or both ends of the cylinder body 511 may be opened and covered with the upper cover 512 and the lower cover (not shown), respectively. In this case, as in the foregoing embodiment, the refrigerant connection pipe 52 and the refrigerant suction pipe 53 are arranged parallel to each other so as to overlap each other in the longitudinal direction of the casing 51, and both ends of the refrigerant suction pipe 53 may be fixed to the casing 51. In this regard, the description of the foregoing embodiments is replaced with the specific description thereof, similarly to the foregoing embodiments.

On the other hand, in the above-described embodiment, the single-type rotary compressor having one cylinder is described as an example, but the present invention is applicable to a double-type rotary compressor, a hinge vane rotary compressor, a high-pressure type scroll compressor, or the like, in which the cylinder is arranged in the axial direction of the rotation shaft, as the case may be. In this regard, the description of the foregoing embodiments is replaced with the specific description thereof, similarly to the foregoing embodiments.

Claims

1. A reservoir for a compressor, comprising:

a shell arranged outside the shell of the compressor and provided with a refrigerant accommodating space;

a refrigerant connection pipe having one end extending outside the refrigerant accommodating space and the other end communicating with the refrigerant accommodating space; and

a refrigerant suction pipe having one end communicating with the refrigerant accommodating space of the housing and the other end communicating with the suction side of the compressor,

the refrigerant suction pipes are respectively fixed to a bottom surface and a top surface of the housing forming the refrigerant accommodating space,

The refrigerant connection pipe includes:

a first guide portion extending in a longitudinal direction of the housing in the refrigerant accommodating space; and

a second guide portion bent and extended from a lower end of the first guide portion in two directions to rotate the refrigerant flowing into the refrigerant accommodating space along an inner circumferential surface of the housing,

the first guide portion and the second guide portion bent and extended in two directions are formed in a T-tube shape,

at least one refrigerant through hole communicating with the refrigerant accommodating space is formed in the refrigerant suction pipe,

the refrigerant through hole is opened in a direction intersecting a direction in which the refrigerant suction pipe and the refrigerant connection pipe face each other,

the refrigerant connection pipe is arranged eccentrically with respect to the axis of the casing,

the refrigerant through hole is formed higher than or equal to the other end of the refrigerant connection pipe with respect to the longitudinal direction of the housing.

2. The accumulator for a compressor according to claim 1, wherein,

a pipe fixing portion for fixing one end of the refrigerant suction pipe is formed at the top surface of the housing.

3. The accumulator for a compressor according to claim 2, wherein,

the pipe fixing portion is recessed in a direction away from the refrigerant accommodating space in a longitudinal direction of the housing such that one end of the refrigerant suction pipe is inserted into the pipe fixing portion.

4. The accumulator for a compressor according to claim 2, wherein,

the pipe fixing portion protrudes in the longitudinal direction of the housing toward the refrigerant accommodating space and is inserted into one end of the refrigerant suction pipe.

5. The accumulator for a compressor according to claim 2, wherein,

the pipe fixing portion is formed to penetrate a pipe hole of the casing along a longitudinal direction of the casing so that the refrigerant suction pipe penetrates the casing and is fixed.

6. The accumulator for a compressor according to claim 2, wherein,

the pipe fixing portion is formed on an axial line of the housing.

7. The accumulator for a compressor according to claim 1, wherein,

at least a part of the refrigerant suction pipe overlaps the refrigerant connection pipe in the longitudinal direction of the housing.

8. The accumulator for a compressor according to claim 1, wherein,

The refrigerant suction pipe is disposed on an axial line of the casing.

9. The accumulator for a compressor according to claim 8, wherein,

the refrigerant connection pipe is disposed closer to the axis of the compressor than the refrigerant suction pipe.

10. The accumulator for a compressor according to claim 1, wherein,

the other end of the refrigerant connection pipe opens into the refrigerant accommodating space.

11. The accumulator for a compressor according to claim 1, wherein,

a filter screen member is coupled to the other end of the refrigerant connection pipe, and the filter screen member filters foreign matters flowing into the refrigerant accommodation space.

12. The accumulator for a compressor according to claim 11, wherein,

the filter screen member is formed of a mesh screen formed at the other end portion of the refrigerant connection pipe or inserted into the other end portion of the refrigerant connection pipe,

the refrigerant connection pipe is provided with a filter screen support portion for supporting the filter screen member.

13. The accumulator for a compressor according to claim 11, wherein,

the filter screen member is inserted into the first guide portion and supported at a combined position of the second guide portion and the first guide portion.

14. The accumulator for a compressor according to claim 1, wherein,

the housing includes:

a main body, the lower end of which is covered, the refrigerant suction pipe penetrating and being coupled to the lower end of the main body, the upper end of the main body being opened; and

an upper cover covering an upper end of the main body, the refrigerant connection pipe penetrating the upper cover,

a pipe fixing portion is formed on the upper cover, one end of the refrigerant suction pipe is inserted into and fixed to the pipe fixing portion,

a through hole is formed in one side of the pipe fixing portion, and the refrigerant connection pipe is inserted through and coupled to the through hole.

15. The accumulator for a compressor according to claim 14, wherein,

the pipe fixing portion is formed at the center of the upper cover, and the through hole is formed eccentrically from the center of the upper cover toward the axial center side of the compressor.

16. The accumulator for a compressor according to claim 15, wherein,

the pipe fixing portion is recessed from an inner surface of the upper cover forming the refrigerant accommodating space toward an outer surface side of the upper cover, and one end of the refrigerant suction pipe is inserted into and fixed to the pipe fixing portion.

17. The accumulator for a compressor according to claim 14, wherein,

the through hole is formed in the center of the upper cover, and the pipe fixing portion is formed eccentrically from the center of the upper cover to a side closer to the axial center of the compressor or a side farther from the axial center of the compressor.

18. The accumulator for a compressor according to claim 1, wherein,

the refrigerant suction pipe includes:

a refrigerant flow path tube which is accommodated in a refrigerant accommodation space of the casing; and

a refrigerant suction pipe having one end communicating with the refrigerant flow path pipe and the other end communicating with a suction side of the compressor,

both ends in the longitudinal direction of the refrigerant flow path tube are fixed to both sides in the longitudinal direction of the casing, respectively.

19. A compressor, comprising:

a housing formed with a closed inner space;

an electric part arranged in the inner space of the shell;

a compression unit provided in the inner space of the casing and driven by the electric unit, the compression unit compressing and discharging a refrigerant to the inner space of the casing; and

a reservoir disposed outside the housing and supported by the housing, the reservoir penetrating the housing and being connected to the compression portion,

The accumulator is an accumulator for a compressor according to any one of claims 1 to 18.