Compressor

Abstract

To reduce vibration transmitted from a compressor body container to an accumulator container through an accumulator connection pipe.SOLUTION: A compressor includes a compression unit for compressing a refrigerant, a motor for driving the compression unit, a compressor body container for storing the compression unit and the motor therein, and an accumulator container connected to the compressor body container so as to introduce the refrigerant to the compression unit. The accumulator container has an accumulator connection pipe connected to the compressor body container. The accumulator connection pipe has an exposed portion at which the accumulator connection pipe is exposed to the outside of the accumulator container. An adjustment portion to shorten the length of the exposed portion by 1 / 2 times or more of an outside diameter of the accumulator connection pipe is provided in the accumulator container.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a compressor. [Background technology]

[0002] A known compressor includes a compression unit that compresses a refrigerant, a motor that drives the compression unit, a compressor main body container that houses the compression unit and the motor, and an accumulator container connected to the compressor main body container so as to introduce the refrigerant into the compression unit. The accumulator container in this type of compressor has an accumulator connecting pipe that extends from the accumulator container and is connected to the compressor main body container, and a through hole through which the accumulator connecting pipe passes. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-50684 Summary of the Invention [Problem to be solved by the invention]

[0004] The accumulator connecting pipe of the accumulator container described above has an exposed portion where the accumulator connecting pipe is exposed on the outside of the accumulator container, which poses a problem that vibrations generated in the compressor main body container are transmitted to the accumulator container via the exposed portion. For this reason, it is conceivable to reduce the vibrations transmitted from the compressor main body container to the accumulator container by shortening the length of the exposed portion of the accumulator connecting pipe and increasing the rigidity of the exposed portion.

[0005] In particular, in the case of a two-cylinder compressor, the exposed portion of one accumulator connecting pipe is longer than that of the other accumulator connecting pipe due to the arrangement of two accumulator connecting pipes. Since the exposed portion of one accumulator connecting pipe with a longer length is less rigid than that of the other accumulator connecting pipe, vibrations are more likely to be transmitted from the compressor main container to the accumulator container via the exposed portion of the one accumulator connecting pipe. Therefore, vibrations of the accumulator container can easily become a problem within the range of motor rotation speeds during compressor operation.

[0006] One way to shorten the exposed length of the accumulator connecting pipe is to use burring to form a cylindrical portion (burred portion) that rises outward from the accumulator container around the through hole in the accumulator container. However, if the length of the cylindrical portion is made greater than or equal to the diameter of the accumulator connecting pipe, the wall thickness of the cylindrical portion becomes too thin to ensure sufficient mechanical strength, making it impossible to properly secure the accumulator connecting pipe that is passed through the through hole.

[0007] The disclosed technique has been made in view of the above, and aims to provide a compressor that can reduce vibrations transmitted from the compressor main body container to the accumulator container via the accumulator connecting pipe. [Means for solving the problem]

[0008] One aspect of the compressor disclosed herein includes a compression unit that compresses a refrigerant, a motor that drives the compression unit, a compressor main body container that houses the compression unit and the motor, and an accumulator container connected to the compressor main body container to introduce the refrigerant into the compression unit. The accumulator container has an accumulator connecting pipe connected to the compressor main body container. The accumulator connecting pipe has an exposed portion where the accumulator connecting pipe is exposed on the outside of the accumulator container. The accumulator container is provided with an adjustment portion that shortens the length of the exposed portion by at least half the outer diameter of the accumulator connecting pipe. [Effects of the Invention]

[0009] According to one aspect of the compressor disclosed in the present application, it is possible to reduce vibrations transmitted from the compressor main body container to the accumulator container via the accumulator connecting pipe. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a vertical cross-sectional view showing a compressor according to a first embodiment. [Figure 2] FIG. 2 is an exploded perspective view showing a compression unit of the compressor of the first embodiment. [Figure 3] FIG. 3 is a vertical cross-sectional view showing a main part of the accumulator container in the compressor of the first embodiment. [Figure 4] FIG. 4 is a vertical cross-sectional view showing a main part of an accumulator container in a compressor of a comparative example. [Figure 5] FIG. 5 is a vertical cross-sectional view showing a main part of an accumulator container in a compressor according to a second embodiment. [Figure 6] FIG. 6 is a vertical cross-sectional view showing a main part of an accumulator container in a compressor according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the compressor disclosed in the present application will be described in detail with reference to the drawings. However, the compressor disclosed in the present application is not limited to the following embodiments. [Example]

[0012] (Compressor configuration) Fig. 1 is a vertical cross-sectional view showing a compressor of embodiment 1. Fig. 2 is an exploded perspective view showing a compression section of the compressor of embodiment 1.

[0013] 1, compressor 1 includes a compression section 12 located in the lower part of a sealed, vertically-placed, cylindrical compressor main container (hereinafter referred to as the main container) 10, a motor 11 located in the upper part of main container 10 and driving compression section 12 via shaft 15, and a vertically-placed, cylindrical accumulator container 26 fixed to the outer circumferential surface of main container 10. Compressor 1 is a rotary compressor that draws refrigerant from accumulator container 26 into main container 10, compresses it, and discharges the compressed high-pressure refrigerant into the main container 10 and then discharges it into a refrigeration cycle through a discharge pipe 107.

[0014] An upper compression section suction pipe 102T and a lower compression section suction pipe 102S are provided penetrating the main container 10 to draw low-pressure refrigerant from the refrigeration cycle into the compression section 12. More specifically, an upper guide pipe 101T is fixed to the main container 10 by, for example, brazing, and the upper compression section suction pipe 102T passes through the inside of the upper guide pipe 101T and is fixed to the upper guide pipe 101T by, for example, brazing. Similarly, a lower guide pipe 101S is fixed to the main container 10 by, for example, brazing, and the lower compression section suction pipe 102S passes through the inside of the lower guide pipe 101S and is fixed to the lower guide pipe 101S by, for example, brazing.

[0015] A discharge pipe 107 for discharging the high-pressure refrigerant compressed in the compression section 12 from inside the main container 10 to the refrigeration cycle is provided to pass through the upper part of the main container 10. A base member 310 that supports the entire compressor 1 is fixed to the lower part of the main container 10 by welding.

[0016] (accumulator vessel) The accumulator container 26 has an accumulator suction pipe 27 that draws refrigerant from the refrigeration cycle into the accumulator container 26, and an upper accumulator connecting pipe 28T as a first accumulator connecting pipe and a lower accumulator connecting pipe 28S as a second accumulator connecting pipe that are connected to the main container 10 so as to introduce refrigerant into the compression section 12.

[0017] The accumulator suction pipe 27 is connected to the upper part of the accumulator container 26. The upper accumulator connecting pipe 28T connected to the upper cylinder 121T of the compression section 12 is formed in a generally L-shape and includes an upper gas-liquid separation pipe 31T, which is a straight pipe, and an upper connecting pipe 104T, which is a curved pipe. The lower end of the upper gas-liquid separation pipe 31T is connected to the upper end of the upper connecting pipe 104T by a cylindrical upper connecting part 30T. Similarly, the lower accumulator connecting pipe 28S connected to the lower cylinder 121S of the compression section 12 is formed in a generally L-shape and includes a lower gas-liquid separation pipe 31S, which is a straight pipe, and a lower connecting pipe 104S, which is a curved pipe. The lower end of the lower gas-liquid separation pipe 31S is connected to the upper end of the lower connecting pipe 104S by a cylindrical lower connecting part 30S.

[0018] The upper accumulator connecting pipe 28T and the lower accumulator connecting pipe 28S are formed as circular pipes having a circular cross section, and are formed to have the same outer diameter D. That is, in the upper accumulator connecting pipe 28T and the lower accumulator connecting pipe 28S, the upper gas-liquid separation pipe 31T and the lower gas-liquid separation pipe 31S have the same outer diameter, the upper connecting pipe 104T and the lower connecting pipe 104S have the same outer diameter, and the upper connecting portion 30T and the lower connecting portion 30S have the same outer diameter.

[0019] The accumulator vessel 26 is configured by combining a pair of an upper vessel 26a and a lower vessel 26b, and a support plate 26c is provided at the connection between the upper vessel 26a and the lower vessel 26b to support the upper gas-liquid separation pipe 31T and the lower gas-liquid separation pipe 31S. The support plate 26c supports the longitudinal center of the upper gas-liquid separation pipe 31T and also supports the longitudinal center of the lower gas-liquid separation pipe 31S. The lower vessel 26b of the accumulator vessel 26 has a first through-hole 35A through which the upper accumulator connecting pipe 28T passes and a second through-hole 35B through which the lower accumulator connecting pipe 28S passes. Details of the features of the accumulator vessel 26 in this embodiment will be described later.

[0020] The upper end of the upper gas-liquid separation pipe 31T opens at an upper portion inside the accumulator vessel 26. Similarly, the upper end of the lower gas-liquid separation pipe 31S opens at an upper portion inside the accumulator vessel 26. Inside the accumulator vessel 26, a filter 29 that captures foreign matter from the refrigerant supplied from the accumulator suction pipe 27 is provided between the lower end of the accumulator suction pipe 27 and the upper ends of the upper gas-liquid separation pipe 31T and the lower gas-liquid separation pipe 31S. The accumulator vessel 26 draws gas refrigerant separated from the two-phase gas-liquid refrigerant from the upper ends of the upper gas-liquid separation pipe 31T and the lower gas-liquid separation pipe 31S, and sends the gas refrigerant from the accumulator vessel 26 to the main vessel 10 through the upper connecting pipe 104T and the lower connecting pipe 104S.

[0021] Additionally, the upper gas-liquid separation pipe 31T and the lower gas-liquid separation pipe 31S have a plurality of lubricating oil return holes 34 that connect the interior of each pipe to the interior of the accumulator container 26. In the accumulator container 26, the lubricating oil 18 accumulated in the accumulator container 26 is returned to the main container 10 through the plurality of lubricating oil return holes 34, thereby preventing a shortage of lubricating oil 18 in the main container 10.

[0022] A fixing member 41 for fixing the accumulator container 26 to the main container 10 is provided on the outer periphery of the main container 10. The fixing member 41 has a band member 41a attached around the outer periphery of the accumulator container 26, and a holder member 41b for fixing the band member 41a to the outer periphery of the main container 10. A metal band, for example, is used as the band member 41a. The holder member 41b is welded to the outer periphery of the main container 10. Alternatively, for example, instead of using the band member 41a, the outer periphery of the accumulator container 26 may be welded to the holder member 41b.

[0023] FIG. 2 is an exploded perspective view showing the compression section 12 of the compressor 1 of the embodiment. As shown in FIGS. 1 and 2, the compression section 12 has an upper cylinder 121T, a lower cylinder 121S, an intermediate partition plate 140, an upper end plate 160T, and a lower end plate 160S. The upper end plate 160T, the upper cylinder 121T, the intermediate partition plate 140, the lower cylinder 121S, and the lower end plate 160S are stacked in this order and fixed with a plurality of bolts 175. The upper end plate 160T is provided with a main bearing portion 161T. The lower end plate 160S is provided with a sub-bearing portion 161S. The shaft 15 is provided with a main shaft portion 153, an upper eccentric portion 152T, a lower eccentric portion 152S, and a sub-shaft portion 151. The shaft 15 has the main shaft portion 153 and the sub-shaft portion 151 supported by the compression section 12. The main shaft portion 153 of the shaft 15 is fitted into the main bearing portion 161T of the upper end plate 160T, and the sub-shaft portion 151 of the shaft 15 is fitted into the sub-bearing portion 161S of the lower end plate 160S, so that the shaft 15 is rotatably supported by the main bearing portion 161T and the sub-bearing portion 161S.

[0024] The motor 11 has a stator 111 disposed on the outside and a rotor 112 disposed on the inside. The stator 111 is fixed to the inner circumferential surface 10a of the main container 10 by, for example, shrink fitting or welding. The rotor 112 is fixed to the shaft 15 by shrink fitting.

[0025] The interior of the main container 10 is filled with lubricating oil 18 in an amount that nearly immerses the compression section 12, for lubricating the sliding members of the compression section 12 and sealing between the high-pressure and low-pressure sections within the cylinder chamber.

[0026] Next, the compression section 12 will be described in detail using Figure 2. The upper cylinder 121T has a cylindrical upper hollow section 130T therein, and an upper piston 125T is disposed in the upper hollow section 130T. The upper piston 125T is fitted into the upper eccentric section 152T of the shaft 15. The lower cylinder 121S has a cylindrical lower hollow section 130S therein, and a lower piston 125S is disposed in the lower hollow section 130S. The lower piston 125S is fitted into the lower eccentric section 152S of the shaft 15.

[0027] The upper cylinder 121T is provided with an upper vane groove 128T extending from the upper hollow portion 130T to the outer periphery, and an upper vane 127T is disposed in the upper vane groove 128T. The upper cylinder 121T is provided with an upper spring hole 124T that leads from the outer periphery to the upper vane groove 128T, and an upper spring 126T is disposed in the upper spring hole 124T. The lower cylinder 121S is provided with a lower vane groove 128S that extends from the lower hollow portion 130S to the outer periphery, and a lower vane 127S is disposed in the lower vane groove 128S. The lower cylinder 121S is provided with a lower spring hole 124S that leads from the outer periphery to the lower vane groove 128S, and a lower spring 126S is disposed in the lower spring hole 124S.

[0028] One end of the upper vane 127T is pressed against the upper piston 125T by the upper spring 126T, dividing the space outside the upper piston 125T in the upper hollow portion 130T of the upper cylinder 121T into an upper suction chamber 131T and an upper compression chamber 133T, which are upper cylinder chambers. The upper cylinder 121T is provided with an upper suction hole 135T that communicates with the upper suction chamber 131T from its outer periphery. An upper compression section suction pipe 102T is connected to the upper suction hole 135T. One end of the lower vane 127S is pressed against the lower piston 125S by the lower spring 126S, dividing the space outside the lower piston 125S in the lower hollow portion 130S of the lower cylinder 121S into a lower suction chamber 131S and a lower compression chamber 133S, which are lower cylinder chambers. The lower cylinder 121S is provided with a lower suction hole 135S that communicates with the lower suction chamber 131S from its outer periphery. A lower compression section suction pipe 102S is connected to the lower suction hole 135S.

[0029] The upper end plate 160T has an upper discharge hole 190T that penetrates the upper end plate 160T and communicates with the upper compression chamber 133T. An upper discharge valve 200T, which is a reed valve that opens and closes the upper discharge hole 190T, and an upper discharge valve retainer 201T that prevents the upper discharge valve 200T from warping are fixed to the upper end plate 160T with upper rivets 202T. An upper end plate cover 170T that covers the upper discharge hole 190T is disposed above the upper end plate 160T, forming an upper end plate cover chamber 180T that is closed by the upper end plate 160T and the upper end plate cover 170T. The upper end plate cover 170T is fixed to the upper end plate 160T with a plurality of bolts 175 that also secure the upper end plate 160T to the upper cylinder 121T. The upper end plate cover 170T is provided with an upper end plate cover discharge hole 172 that connects the upper end plate cover chamber 180T with the inside of the main container 10. When the compression section 12 is provided inside the main container 10, the inner peripheral surface 10a of the main container 10 is shrink-fitted to the outer peripheral surface 182a of the upper end plate 160T, and is joined to the main container 10 by a plurality of welds V (FIG. 4). The structure of the upper end plate 160T in this embodiment will be described in detail later.

[0030] The lower end plate 160S is provided with a lower discharge hole 190S that penetrates the lower end plate 160S and communicates with the lower compression chamber 133S. A lower discharge valve 200S, which is a reed valve that opens and closes the lower discharge hole 190S, and a lower discharge valve retainer 201S that prevents the lower discharge valve 200S from warping are fixed to the lower end plate 160S with lower rivets 202S. A lower end plate cover 170S that covers the lower discharge hole 190S is disposed below the lower end plate 160S, and a lower end plate cover chamber 180S that is closed by the lower end plate 160S and the lower end plate cover 170S is formed (see FIG. 1). The lower end plate cover 170S is fixed to the lower end plate 160S with a plurality of bolts 175 that also secure the lower end plate 160S to the lower cylinder 121S.

[0031] In addition, the compression section 12 is provided with a refrigerant passage hole 136 (see Figure 2) that penetrates the lower end plate 160S, the lower cylinder 121S, the intermediate partition plate 140, the upper end plate 160T and the upper cylinder 121T and connects the lower end plate cover chamber 180S and the upper end plate cover chamber 180T.

[0032] The flow of refrigerant caused by the rotation of the shaft 15 will be described below. As the shaft 15 rotates, the upper piston 125T fitted in the upper eccentric portion 152T of the shaft 15 and the lower piston 125S fitted in the lower eccentric portion 152S revolve, causing the upper suction chamber 131T and the lower suction chamber 131S to expand in volume and draw in refrigerant. As a refrigerant intake path, low-pressure refrigerant from the refrigeration cycle is drawn into the accumulator container 26 through the accumulator suction pipe 27, and only gaseous refrigerant is drawn into the upper gas-liquid separation pipe 31T and the lower gas-liquid separation pipe 31S. The gaseous refrigerant drawn into the upper gas-liquid separation pipe 31T passes through the upper connecting pipe 104T and the upper compression section suction pipe 102T and is drawn into the upper suction chamber 131T. Similarly, the gas refrigerant drawn into the lower gas-liquid separation pipe 31S passes through the lower connecting pipe 104S and the lower compression section suction pipe 102S, and is drawn into the lower suction chamber 131S.

[0033] Next, we will explain the flow of refrigerant discharged by the rotation of shaft 15. As shaft 15 rotates, upper piston 125T fitted to upper eccentric portion 152T of shaft 15 revolves, causing upper compression chamber 133T to compress the refrigerant while reducing its volume. When the pressure of the compressed refrigerant becomes higher than the pressure in upper end plate cover chamber 180T outside upper discharge valve 200T, upper discharge valve 200T opens and discharges the refrigerant from upper compression chamber 133T to upper end plate cover chamber 180T. The refrigerant discharged into upper end plate cover chamber 180T is discharged into main container 10 through upper end plate cover discharge hole 172 provided in upper end plate cover 170T.

[0034] Furthermore, as the shaft 15 rotates, the lower piston 125S fitted in the lower eccentric portion 152S of the shaft 15 revolves, compressing the refrigerant while reducing the volume of the lower compression chamber 133S, and when the pressure of the compressed refrigerant becomes higher than the pressure in the lower end plate cover chamber 180S outside the lower discharge valve 200S, the lower discharge valve 200S opens and discharges the refrigerant from the lower compression chamber 133S to the lower end plate cover chamber 180S. The refrigerant discharged into the lower end plate cover chamber 180S passes through the refrigerant passage hole 136 and the upper end plate cover chamber 180T and is discharged into the main body container 10 from the upper end plate cover discharge hole 172T provided in the upper end plate cover 170T.

[0035] The refrigerant discharged into the main container 10 is guided above the motor 11 through a notch (not shown) on the outer periphery of the stator 111 that connects the top and bottom, or a gap (not shown) in the winding section of the stator 111, or a gap 115 (see Figure 1) between the stator 111 and the rotor 112, and is discharged from a discharge pipe 107 located at the top of the main container 10.

[0036] Next, the flow of lubricating oil 18 will be described. Lubricating oil 18 sealed in the lower part of main container 10 is supplied to compression section 12 through the interior of shaft 15 (not shown) by the centrifugal force of shaft 15. Lubricating oil 18 supplied to compression section 12 is entrained in the refrigerant and atomized, and then discharged into main container 10 together with the refrigerant. The mist-like lubricating oil 18 discharged into main container 10 is separated from the refrigerant by centrifugal force caused by the rotational force of motor 11, and returns to the bottom of main container 10 as oil droplets. However, some of the lubricating oil 18 is not separated and is discharged into the refrigeration cycle together with the refrigerant. Lubricating oil 18 discharged into the refrigeration cycle circulates through the refrigeration cycle and returns to accumulator container 26, where it is separated and accumulates in the lower part of accumulator container 26. The lubricating oil 18 accumulated in the lower part of accumulator container 26 is drawn into upper suction chamber 131T and lower suction chamber 131S through lubricating oil return hole 34.

[0037] (Characteristic structure of the compressor) Next, a description will be given of a characteristic structure of the compressor 1 of this embodiment. The characteristics of this embodiment include a structure that reduces vibration transmitted through the exposed portion of the accumulator connecting pipe by increasing the rigidity of the exposed portion that is exposed to the outside of the accumulator container.

[0038] 3 is a vertical cross-sectional view showing a main portion of the accumulator vessel 26 in the compressor 1 of the first embodiment. As shown in FIGS. 1 and 3, the upper accumulator connecting pipe 28T has an upper exposed portion 32T where the upper accumulator connecting pipe 28T is exposed on the lower outside of the accumulator vessel 26. The lower accumulator connecting pipe 28S has a lower exposed portion 32S where the lower accumulator connecting pipe 28S is exposed on the lower outside of the accumulator vessel 26.

[0039] In this embodiment, as an example, the upper exposed portion 32T corresponds to the upper connecting pipe 104T, and the lower exposed portion 32S corresponds to the lower connecting pipe 104S, but is not limited to this structure. For example, the upper exposed portion 32T may include the lower end of the upper gas-liquid separation pipe 31T, and the lower exposed portion 32S may include the lower end of the lower gas-liquid separation pipe 31S.

[0040] Because the lower accumulator connecting pipe 28S is connected to the lower cylinder 121S disposed below the upper cylinder 121T, the length of the lower exposed portion 32S along the longitudinal direction (pipe axis direction) (hereinafter referred to as the length of the lower exposed portion 32S) is longer than the length of the upper exposed portion 32T of the upper accumulator connecting pipe 28T along the longitudinal direction (pipe axis direction) (hereinafter referred to as the length of the upper exposed portion 32T). For this reason, the lower exposed portion 32S of the lower accumulator connecting pipe 28S has lower rigidity than the upper exposed portion 32T of the upper accumulator connecting pipe 28T, and therefore vibrations are more likely to be transmitted from the main body container 10 to the accumulator container 26 via the lower exposed portion 32S than via the upper exposed portion 32T.

[0041] For this reason, the accumulator container 26 in the first embodiment is provided with an adjustment unit 38 that shortens the length of the lower exposed portion 32S by at least half the outer diameter D of the lower accumulator connecting pipe 28S. The adjustment unit 38 functions as a vibration suppression unit that suppresses vibrations transmitted through the lower exposed portion 32S. Note that Fig. 3 shows, as an example of the first embodiment, a case in which the adjustment unit 38 shortens the length of the lower exposed portion 32S by at least the outer diameter D of the lower accumulator connecting pipe 28S (in other words, a case in which the length L of the lower exposed portion 32S shortened by the adjustment unit 38 is greater than the outer diameter D of the lower accumulator connecting pipe 28S).

[0042] In this embodiment, the outer diameter D of the lower accumulator connecting pipe 28S refers to the outer diameter of the lower gas-liquid separation pipe 31S, but it may also be the outer diameter of the lower connecting pipe 104S or the outer diameter of the lower connecting portion 30S. In other words, the outer diameter of the accumulator connecting pipe in the present disclosure may be the outer diameter at any position in the longitudinal direction of the accumulator connecting pipe.

[0043] The adjustment portion 38 in the first embodiment is a cylindrical member 39 that is fixed to the second through hole 35B of the accumulator container 26 and holds the lower exposed portion 32S of the lower accumulator connecting pipe 28S. The cylindrical member 39 in the first embodiment is formed so that the length L extending downward from the bottom surface around the second through hole 35B on the outside of the accumulator container 26 is equal to or greater than the outer diameter D of the lower accumulator connecting pipe 28S. The cylindrical member 39 extends from the second through hole 35B to the outside of the accumulator container 26, i.e., below the lower container 26b, and holds the lower coupling portion 30S of the lower accumulator connecting pipe 28S. An upper end portion 39a of the cylindrical member 39 is fixed by brazing to a cylindrical flange portion 26d that protrudes into the accumulator container 26 from the second through hole 35B. The lower end portion 39b of the cylindrical member 39 holds the lower coupling portion 30S of the lower accumulator connecting pipe 28S by brazing it to the inner peripheral surface of the cylindrical member 39 over the outer peripheral surface of the lower coupling portion 30S.

[0044] By providing the tubular member 39 on the accumulator container 26 in this manner, the length of the lower exposed portion 32S is shortened according to the length of the easily processable tubular member 39, thereby increasing the rigidity of the lower exposed portion 32S. Therefore, in the first embodiment, it is possible to reduce vibrations transmitted from the main container 10 to the accumulator container 26 via the lower exposed portion 32S, thereby reducing vibrations generated in the accumulator container 26. Furthermore, by holding the lower accumulator connecting pipe 28S in the tubular member 39 provided on the accumulator container 26, the reliability of the fixed state of the lower accumulator connecting pipe 28S fixed to the accumulator container 26 is also ensured.

[0045] Furthermore, the upper accumulator connecting pipe 28T has an upper coupling portion 30T brazed and fixed to a first through hole 35A in the lower container 26b of the accumulator container 26. Furthermore, the upper coupling portion 30T is fixed to a cylindrical flange portion 26d that protrudes from the first through hole 35A into the inside of the accumulator container 26. The flange portions 26d of the first through hole 35A and the second through hole 35B protrude toward the inside of the accumulator container 26, but may also protrude toward the outside of the accumulator container 26.

[0046] The upper accumulator connecting pipe 28T and the lower accumulator connecting pipe 28S are formed from copper or an alloy primarily containing copper. In such cases, the upper accumulator connecting pipe 28T and the lower accumulator connecting pipe 28S are easily machined and therefore highly workable, but have a problem in that vibrations are easily transmitted due to their low rigidity. This embodiment focuses on the fact that the lower accumulator connecting pipe 28S is particularly low in rigidity due to its long length, and therefore provides an adjustment portion 38 (cylindrical member 39) to shorten the lower exposed portion 32S, thereby increasing the rigidity and reducing vibrations transmitted via the lower exposed portion 32S, thereby significantly reducing vibrations generated in the lower accumulator connecting pipe 28S.

[0047] The cylindrical member 39 is made of iron or an alloy (steel material) containing iron as a main component. Since the cylindrical member 39 is made of a material having higher rigidity than the material of the lower accumulator connecting pipe 28S, which is made of copper as a main component, the cylindrical member 39 can appropriately increase the rigidity of the lower exposed portion 32S of the lower accumulator connecting pipe 28S.

[0048] (Comparative Example) Fig. 4 is a longitudinal cross-sectional view showing a main part of accumulator vessel 526 in a compressor of the comparative example. As shown in Fig. 4, accumulator vessel 526 in the comparative example has cylindrical flange portion 526d protruding outward from accumulator vessel 526 through first through hole 35A and second through hole 35B, instead of adjustment portion 38 (cylindrical member 39) in Example 1.

[0049] Since such flange portion 526d is formed by extending the periphery of first through hole 35A and second through hole 35B by burring first through hole 35A and second through hole 35B, there is a limit to the length L0 of flange portion 526d in the protruding direction. In other words, as the length L0 of flange portion 526d in the protruding direction is increased, the thickness of flange portion 526d becomes thinner and the mechanical strength decreases, making it impossible to properly fix upper accumulator connecting pipe 28T and lower accumulator connecting pipe 28S.

[0050] For this reason, when the flange portion 526d is formed so as to properly hold the upper accumulator connecting pipe 28T and the lower accumulator connecting pipe 28S, the length L0 of the flange portion 526d in the protruding direction is less than half the outer diameter D of the upper accumulator connecting pipe 28T and the lower accumulator connecting pipe 28S. Therefore, in the comparative example, there is a limit to how short the length of the upper exposed portion 32T of the upper accumulator connecting pipe 28T and the length of the lower exposed portion 32S of the lower accumulator connecting pipe 28S can be made, making it difficult to sufficiently increase the rigidity of the upper exposed portion 32T and the lower exposed portion 32S.

[0051] (Effects of the Example) As described above, in the compressor 1 of the first embodiment, the lower accumulator connecting pipe 28S of the accumulator vessel 26 has a lower exposed portion 32S where the lower accumulator connecting pipe 28S is exposed outside the accumulator vessel 26, and the accumulator vessel 26 is provided with an adjustment portion 38 that shortens the length of the lower exposed portion 32S by at least half the outer diameter D of the lower accumulator connecting pipe 28S. This increases the rigidity of the lower exposed portion 32S, thereby reducing vibrations transmitted from the main body vessel 10 to the accumulator vessel 26 via the lower exposed portion 32S and enabling vibrations generated in the accumulator vessel 26 to be reduced.

[0052] Furthermore, the accumulator vessel 26 in the compressor 1 of the first embodiment has a second through hole 35B through which the lower accumulator connecting pipe 28S passes and a cylindrical member 39 that extends from the second through hole 35B to the outside of the accumulator vessel 26 and holds the lower accumulator connecting pipe 28S, and the adjustment unit 38 includes the cylindrical member 39. As a result, compared to forming the flange portion 526d by burring as in the comparative example ( FIG. 4 ), for example, by simply changing the length of the cylindrical member 39, which is easier to process, the length L of the lower exposed portion 32S that is shortened by the adjustment unit 38 can be set to an appropriate length, and the rigidity of the lower exposed portion 32S can be increased. Therefore, in the first embodiment, vibrations transmitted from the main vessel 10 to the accumulator vessel 26 via the lower exposed portion 32S can be reduced, thereby reducing vibrations generated in the accumulator vessel 26. Furthermore, since the lower accumulator connecting pipe 28S is held by the cylindrical member 39 provided in the accumulator vessel 26, the reliability of the fixed state of the lower accumulator connecting pipe 28S fixed to the accumulator vessel 26 is also ensured.

[0053] Furthermore, the accumulator vessel 26 in the compressor 1 of the first embodiment has an upper accumulator connecting pipe 28ST and a lower accumulator connecting pipe 28S having a lower exposed portion 32S longer than the upper exposed portion 32T of the upper accumulator connecting pipe 28T, and the adjustment unit 38 is provided on the lower accumulator connecting pipe 28S. This makes it possible to shorten the length of the lower exposed portion 32S of the lower accumulator connecting pipe 28S in a two-cylinder compressor 1 having the lower accumulator connecting pipe 28S having a lower exposed portion 32S longer than the upper exposed portion 32T of the upper accumulator connecting pipe 28T.

[0054] Furthermore, in the compressor 1 of the first embodiment, the lower accumulator connecting pipe 28S of the accumulator vessel 26 is formed of copper or an alloy containing copper as a main component. As a result, according to the first embodiment, the upper accumulator connecting pipe 28T and the lower accumulator connecting pipe 28S can be easily processed, resulting in high workability, but low rigidity. Therefore, there is a significant effect of reducing vibrations transmitted via the adjustment portion 38 (cylindrical member 39) and reducing vibrations generated in the lower accumulator connecting pipe 28S.

[0055] Furthermore, in the compressor 1 of the first embodiment, the cylindrical member 39 of the accumulator vessel 26 is made of iron or an alloy containing iron as its main component. In this way, the cylindrical member 39 is made of a material that is more rigid than the material of the lower accumulator connecting pipe 28S, which is made of copper as its main component, and thus the cylindrical member 39 can appropriately increase the rigidity of the lower exposed portion 32S of the lower accumulator connecting pipe 28S.

[0056] Other embodiments will be described below with reference to the drawings. In the other embodiments, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the description thereof will be omitted. [Example]

[0057] 5 is a vertical cross-sectional view showing a main part of accumulator vessel 26 in a compressor of embodiment 2. Embodiment 2 differs from embodiment 1 in that in addition to an adjustment part (cylindrical member) provided in second through hole 35B of accumulator vessel 26, another adjustment part is provided in first through hole 35A of accumulator vessel 26.

[0058] As shown in FIG. 5, the accumulator container 26 in the second embodiment has a first adjustment part 38A as another adjustment part that shortens the length of the upper exposed part 32T of the upper accumulator connecting pipe 28T by at least half the outer diameter D of the upper accumulator connecting pipe 28T, and a second adjustment part 38B as an adjustment part that shortens the length of the lower exposed part 32S of the lower accumulator connecting pipe 28S by at least half the outer diameter D of the lower accumulator connecting pipe 28S, as in the first embodiment.

[0059] The first adjustment portion 38A is a first cylindrical member 39A that is fixed to the first through hole 35A of the accumulator vessel 26 and holds the upper exposed portion 32T of the upper accumulator connecting pipe 28T. The second adjustment portion 38B is a second cylindrical member 39B that is fixed to the second through hole 35B of the accumulator vessel 26 and holds the lower exposed portion 32S of the lower accumulator connecting pipe 28S. The first cylindrical member 39A and the second cylindrical member 39B are similar to the cylindrical member 39 of the above-described embodiment.

[0060] The first cylindrical member 39A is formed so that the length L1 extending downward from the bottom surface around the first through-hole 35A on the outside of the accumulator vessel 26 is equal to or greater than half the outer diameter D of the upper accumulator connecting pipe 28T. The second cylindrical member 39B is formed so that the length L2 extending downward from the bottom surface around the second through-hole 35B on the outside of the accumulator vessel 26 is equal to or greater than the outer diameter D of the lower accumulator connecting pipe 28S.

[0061] In this way, the length L2 of the lower exposed portion 32S shortened by the second cylindrical member 39B is longer than the length L1 of the upper exposed portion 32T shortened by the first cylindrical member 39A. In other words, the length L2 of the portion of the second cylindrical member 39B that functions as the second adjustment portion 38B is longer than the length L1 of the portion of the first cylindrical member 39A that functions as the first adjustment portion 38A (other adjustment portion). This allows the second adjustment portion 38B (second cylindrical member 39B) to appropriately shorten the length of the lower exposed portion 32S of the lower accumulator connecting pipe 28S, which is longer than the length of the upper exposed portion 32T of the upper accumulator connecting pipe 28T.

[0062] In Example 2, the accumulator vessel 26 has a first adjustment portion 38A and a second adjustment portion 38B, and in addition to increasing the rigidity of the lower exposed portion 32S of the lower accumulator connecting pipe 38S by the first adjustment portion 38A (first cylindrical member 39A) as in Example 1, the rigidity of the upper exposed portion 32T of the upper accumulator connecting pipe 38T can be increased by the second adjustment portion 38B (second cylindrical member 39B). This reduces vibrations transmitted from the main vessel 10 to the accumulator vessel 26 via the upper exposed portion 32T and the lower exposed portion 32S, and reduces vibrations generated in the accumulator vessel 26.

[0063] Furthermore, according to the second embodiment, the upper accumulator connecting pipe 28T is held by the first cylindrical member 39A provided in the accumulator container 26, and the lower accumulator connecting pipe 28S is held by the second cylindrical member 39B provided in the accumulator container 26, thereby ensuring the reliability of the fixed state of the upper accumulator connecting pipe 28T and the lower accumulator connecting pipe 28S fixed to the accumulator container 26. [Example]

[0064] 6 is a vertical cross-sectional view showing a main part of an accumulator container in a compressor of Example 3. Example 3 differs from Example 1 in the form of an adjustment portion provided in the accumulator container.

[0065] As shown in Fig. 6, an accumulator container 46 in the third embodiment has an adjustment unit 48 that shortens the length of the lower exposed portion 32S of the lower accumulator connecting pipe 28S by at least half the outer diameter D of the lower accumulator connecting pipe 28S. Note that Fig. 6 shows, as an example of the third embodiment, a case in which the adjustment unit 48 shortens the length of the lower exposed portion 32S by at least the outer diameter D of the lower accumulator connecting pipe 28S (in other words, a case in which the length L3 of the lower exposed portion 32S shortened by the adjustment unit 48 is greater than the outer diameter D of the lower accumulator connecting pipe 28S).

[0066] The accumulator vessel 46 has a bulging portion 49 that bulges downward from the position of the first through hole 35A around the second through hole 35B in the up-down direction of the accumulator vessel 46 (the axial direction of the shaft 15). The adjustment portion 48 in the third embodiment is the bulging portion 49 that is integrally formed with the lower portion of the accumulator vessel 46.

[0067] The bulging portion 49 in the third embodiment is formed so that the length L3 of the adjustment portion 48, which is the distance from the bottom surface around the first through hole 35A on the outside of the accumulator container 46 to the bottom surface around the second through hole 35B on the outside of the accumulator container 46, is equal to or greater than the outer diameter D of the lower accumulator connecting pipe 28S. The lower accumulator connecting pipe 28S has a lower coupling portion 30S fixed to the second through hole 35B formed in the bulging portion 49. The lower coupling portion 30S is fixed to a cylindrical flange portion 26d that protrudes into the accumulator container 26 from the second through hole 35B.

[0068] Although not shown, the adjustment unit 48 in the third embodiment may further include a cylindrical member 39 as in the first embodiment, and the cylindrical member 39 can further shorten the length of the lower exposed portion 32S of the lower accumulator connecting pipe 28S and further increase the rigidity of the lower exposed portion 32S.

[0069] According to the third embodiment, the accumulator container 46 has an adjustment portion 48 (bulge portion 49), which increases the rigidity of the lower exposed portion 32S of the lower accumulator connecting pipe 28S, as in the first embodiment. This reduces the vibration transmitted from the main container 10 to the accumulator container 26 via the lower exposed portion 32S, thereby reducing the vibration generated in the accumulator container 26.

[0070] Furthermore, according to the third embodiment, the lower accumulator connecting pipe 28S is fixed to the second through hole 35B of the bulging portion 49 provided in the accumulator container 26, thereby ensuring the reliability of the fixed state of the lower accumulator connecting pipe 28S.

[0071] The compressor of the present disclosure is not limited to the two-cylinder rotary compressors of the first to third embodiments, but may also be applied to a one-cylinder rotary compressor. [Explanation of symbols]

[0072] 1 Compressor 10 Compressor main body container 11 Motor 12 Compression section 26 Accumulator vessel 28T Upper accumulator connecting pipe (first accumulator connecting pipe) 28S Lower accumulator connecting pipe (second accumulator connecting pipe) 32T Upper exposed part (exposed part) 32S Lower exposed part (exposed part) 35A 1st through hole (through hole) 35B Second through hole (through hole) 38 Adjustment section 38A 1st adjustment unit (other adjustment unit) 38B 2nd adjustment section (adjustment section) 39 Cylindrical member 39A First cylindrical member 39B Second cylindrical member 48 Adjustment section 49 Bulge D Outer diameter L0, L1, L2, L3 lengths

Claims

1. a compressor unit that compresses a refrigerant, a motor that drives the compressor unit, and a compressor main body container that houses the compressor unit and the motor inside; an accumulator container connected to the compressor main body container so as to introduce refrigerant into the compression section, the accumulator container has an accumulator connecting pipe connected to the compressor main body container, the accumulator connecting pipe has an exposed portion where the accumulator connecting pipe is exposed to the outside of the accumulator container, the accumulator container is provided with an adjustment portion that shortens the length of the exposed portion by at least half the outer diameter of the accumulator connecting pipe.

2. the accumulator container has a through hole through which the accumulator connecting pipe passes, and a cylindrical member that extends from the through hole to an outside of the accumulator container and holds the accumulator connecting pipe, The adjustment unit includes the cylindrical member. The compressor according to claim 1 .

3. the accumulator connecting pipe includes a first accumulator connecting pipe and a second accumulator connecting pipe having an exposed portion longer in length than the first accumulator connecting pipe, The adjustment unit is provided in the second accumulator connecting pipe. The compressor according to claim 1 .

4. The first accumulator connecting pipe is provided with another adjusting unit, The length of the adjustment portion of the second accumulator connecting pipe is longer than the other adjustment portions of the first accumulator connecting pipe. The compressor according to claim 3.

5. the accumulator container has a first through hole through which the first accumulator connecting pipe passes, a second through hole through which the second accumulator connecting pipe passes, and a bulging portion formed by a periphery of the second through hole bulging downward from the first through hole, The adjustment portion includes the bulge portion. The compressor according to claim 3.

6. the accumulator connecting pipe is formed of copper or an alloy containing copper as a main component; The compressor according to claim 1 .

7. The cylindrical member is formed of iron or an alloy containing iron as a main component. The compressor according to claim 2 .

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