Accumulator fixing mechanism and compressor

Abstract

To suppress a band from falling off a holder.SOLUTION: An accumulator fixing mechanism for fixing an accumulator on a lateral side of a compressor body, includes: a band formed in a long band shape; a holder for fixing the accumulator by holding both ends of the band fixed to the compressor body and provided along an outer periphery of the accumulator. The holder has: a fixing part fixed to an outer peripheral face of the compressor body; a folded part provided at least on one end of the holder by extending toward an accumulator side and being folded toward a compressor body side; and a recess part formed by cutting out an end part of the folded part. A ratio of a depth dimension of the recess part with respect to a width dimension of the recess part is set 0.4 or more. Also, a ratio of a depth dimension of the recess part with respect to a width dimension of the end part is set 0.3 or more.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present embodiment relates to an accumulator fixing mechanism and a compressor. [Background technology]

[0002] For example, some rotary compressors are equipped with an accumulator. This accumulator is typically fixed to the compressor body during use. Conventionally, a fixing mechanism for fixing the accumulator to the compressor body uses, for example, a holder fixed to the outer surface of the compressor body by welding or the like and an elastically deformable band. In this case, an operator manually wraps the accumulator with the band and hooks the band onto the holder to fix it. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-209809 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with conventional fixing mechanisms, if the band is incompletely attached to the holder when the compressor is assembled, the band may come off the holder due to vibrations during transportation or operation of the compressor, which could result in noise due to vibration of the accumulator or damage to the accumulator causing it to fall off.

[0005] Therefore, an accumulator fixing mechanism that can prevent the band from coming off the holder, and a compressor equipped with the accumulator fixing mechanism are provided. [Means for solving the problem]

[0006] An accumulator fixing mechanism according to an embodiment is for fixing an accumulator to a side of a compressor body and includes a long, strip-shaped band and a holder that is fixed to the compressor body and that holds both ends of the band, which is arranged along the outer periphery of the accumulator, to fix the accumulator. The holder has a fixing portion that is fixed to the outer periphery of the compressor body, a folded portion that is provided on at least one end of the holder, extends toward the accumulator, and is folded back toward the compressor body, and a recess formed by cutting out an end of the folded portion. The ratio (L / D1) of the depth dimension (L) of the recess to the width dimension (D1) of the recess is set to 0.4 or greater. Alternatively, the ratio (L / D2) of the depth dimension (L) of the recess to the width dimension (D2) of the end is set to 0.3 or greater.

[0007] Moreover, the compressor according to the embodiment includes the compressor body, the accumulator, and the accumulator fixing mechanism. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram illustrating an example of a compressor including an accumulator fixing mechanism according to an embodiment. [Figure 2] 1. FIG. 2 is a cross-sectional view taken along the line X2-X2 in FIG. 1 showing an example of a compressor including an accumulator fixing mechanism according to an embodiment, and is an enlarged view showing the configuration around the accumulator fixing mechanism. [Figure 3] FIG. 3 is a diagram illustrating a state in which a locking portion of a band of the accumulator fixing mechanism is removed from a holder, from the state of FIG. 2, in an example of a compressor including an accumulator fixing mechanism according to an embodiment; [Figure 4] FIG. 10 is a front view illustrating an example of a holder in an example of an accumulator fixing mechanism according to an embodiment; [Figure 5] 5 is a cross-sectional view of the holder taken along line X5-X5 in FIG. 4, illustrating an example of an accumulator fixing mechanism according to an embodiment. [Figure 6]FIG. 10 is a front view illustrating an example of a holder and a band in an example of an accumulator fixing mechanism according to an embodiment; [Figure 7] FIG. 10 is a front view showing another example of the holder in the example of the accumulator fixing mechanism according to the embodiment; DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, several embodiments will be described with reference to the drawings. The compressor 1 shown in FIG. 1 can be used, for example, as a component of a refrigeration cycle. The compressor 1 is connected to an external device such as an evaporator or a condenser when in use. The compressor 1, for example, draws in a refrigerant flowing out from the external device, compresses the refrigerant within the compressor 1, and supplies the refrigerant to the external device. The compressor 1 can be configured as, for example, a one-cylinder rotary compressor having one compression chamber in a compressor body 10, a two-cylinder rotary compressor having two compression chambers, or a three-cylinder rotary compressor having three compression chambers.

[0010] As shown in Fig. 1, compressor 1 includes a discharge pipe 2, an inlet pipe 3, a suction pipe 4, a compressor body 10, an accumulator 20, and an accumulator fixing mechanism 30. In the following description, accumulator fixing mechanism 30 may be simply referred to as fixing mechanism 30. The compressor 1 shown in Fig. 1 is an example of a two-cylinder rotary compressor. The compressor 1 is installed and used in the orientation shown in Fig. 1, and the up-down direction of the page in Fig. 1 is the up-down direction of the compressor 1.

[0011] The compressor main body 10 includes a sealed container 11. The sealed container 11 is made of, for example, metal and is formed into a cylindrical shape as a whole. Although not shown in detail, a drive mechanism and a compression mechanism are built into the sealed container 11, and the sealed container 11 is filled with a refrigerant. The drive mechanism is configured with a motor and a cylinder, and operates the compression mechanism. The compression mechanism is operated by the drive mechanism, compresses the refrigerant in the sealed container 11, and discharges it to the outside of the sealed container 11. In this case, the discharge pipe 2 is connected to, for example, the upper part of the sealed container 11 and extends above the sealed container 11.

[0012] The accumulator 20 has the function of temporarily storing the refrigerant flowing into the compressor body 10, storing the pressure of the refrigerant, and releasing that pressure as necessary. The accumulator 20 is made of metal and configured to be cylindrical overall, and is configured to be smaller than, for example, the compressor body 10. The accumulator 20 is fixed to the side of the compressor body 10 in a state floating above the installation surface 90 of the compressor 1. The inlet pipe 3 is connected, for example, to the top of the accumulator 20, extends above the accumulator 20, and is connected to external equipment (not shown).

[0013] The accumulator 20 and the compressor body 10 are connected by a suction pipe 4. The suction pipe 4 extends from the bottom of the accumulator 20 and is connected to the lower part of the outer surface of the sealed container 11. When the compressor body 10 operates, the refrigerant in the compressor body 10 is compressed. Then, the compressed refrigerant is discharged from the compressor body 10 through the discharge pipe 2 to the outside and supplied to external equipment (not shown).

[0014] Furthermore, due to the discharge of the refrigerant, negative pressure is created on the suction pipe 4 side of the compressor body 10. As a result, the refrigerant in the accumulator 20 is sucked into the compressor body 10 through the suction pipe 4, and refrigerant flowing out from an external device (not shown) is sucked into the accumulator 20 through the inlet pipe 3. The refrigerant that has flowed into the accumulator 20 is then adjusted to a constant pressure and supplied to the compressor body 10.

[0015] The fixing mechanism 30 has a function of detachably attaching, i.e., fixing, the accumulator 20 to the side of the compressor body 10. The fixing mechanism 30 fixes the accumulator 20 to the side of the compressor body 10 in a state where the accumulator 20 is lifted above the installation surface 90, i.e., in a position where the bottom of the accumulator 20 does not contact the installation surface 90.

[0016] As shown in FIGS. 2 to 5 , the fixing mechanism 30 includes a band 40 and a holder 50. The band 40 is formed, for example, by bending a long, strip-shaped member that is long in one direction. When no external force is applied to the band 40, the band 40 is formed, for example, into a curved shape with a radius of curvature larger than the outer diameter of the accumulator 20. The band 40 is made of a member that can deform to some extent along the outer peripheral surface of the accumulator 20 when the accumulator 20 is attached to the compressor body 10. The band 40 can be made of an elastically deformable member such as spring steel, but can also be made of other materials.

[0017] The band 40 has a fulcrum portion 41 and a locking portion 42. The fulcrum portion 41 and the locking portion 42 are provided at both ends of the band 40, respectively. The fulcrum portion 41 is a portion that is fixed to the holder 50 before the locking portion 42 when the accumulator 20 is fixed to the compressor body 10. The fulcrum portion 41 is also a portion that serves as a fulcrum for the band 40 when the band 40 is arranged along the outer peripheral surface of the accumulator 20.

[0018] The fulcrum portion 41 is formed, for example, by bending one end of the band 40 in a mountain shape toward the inside of the curve of the band 40, i.e., toward the accumulator 20. The locking portion 42 is a portion that is fixed to the holder 50 after the fulcrum portion 41 when fixing the accumulator 20 to the compressor body 10. The locking portion 42 is configured to be easier to attach to and remove from the holder 50 than the fulcrum portion 41. The locking portion 42 is formed, for example, by bending the end of the band 40 opposite the fulcrum portion 41 in a mountain shape toward the inside of the curve of the band 40, i.e., toward the accumulator 20, and then further bending it in a valley shape in a direction away from the accumulator 20. Either the fulcrum portion 41 or the locking portion 42 may be configured to be fixed to the holder 50 with a screw or the like.

[0019] The holder 50 is fixed to the compressor body 10. The holder 50 has a function of fixing the accumulator 20 by holding both end portions of the band 40 arranged along the outer periphery of the accumulator 20, i.e., the fulcrum portion 41 and the locking portion 42.

[0020] The holder 50 is made of metal such as stainless steel and is formed by bending a long member. In this case, as shown in Fig. 1, the width dimension of the holder 50 is greater than the width dimension of the band 40. Note that the width dimension of the band 40 and the holder 50 refers to the dimension perpendicular to the longitudinal direction of the band 40 and the holder 50, i.e., the dimension in the vertical direction in Fig. 1.

[0021] The holder 50 has a fixing portion 51, a folded portion 52, and a recess 53. The fixing portion 51 is provided in an area spanning the center of the holder 50 in the longitudinal direction, and is a portion that is fixed to the outer peripheral surface of the compressor body 10, i.e., the outer peripheral surface of the sealed container 11. The fixing portion 51 is fixed to the outer peripheral surface of the compressor body 10 by, for example, welding or the like.

[0022] The folded portion 52 is provided on at least one end side of the holder 50. The folded portion 52 corresponds to at least the locking portion 42 of the band 40, and is configured to be able to lock the locking portion 42. The folded portion 52 is provided in the region from the boundary portion of the fixed portion 51 to the end of the band 40. The folded portion 52 extends from the boundary portion of the fixed portion 51 toward the accumulator 20 side, and is then formed in a shape that is folded back toward the compressor main body 10 side.

[0023] In this embodiment, the folded portions 52 are provided at both end portions of the holder 50. The folded portions 52 are configured to be able to attach both the fulcrum portion 41 and the locking portion 42 of the band 40. In this case, the holder 50 can be formed, for example, symmetrically with respect to the center of the holder 50 in the longitudinal direction, as shown in Figures 4 and 5.

[0024] The recess 53 is formed by cutting out an end of the folded portion 52. That is, as shown in Fig. 4, the recess 53 is formed in a notched shape by cutting out both sides of the width direction of the holder 50 in the longitudinal direction of the holder 50. Here, if the bottom of the recess 53 is defined as the bottom 54, then on both sides of the recess 53 in the width direction of the band 40, there are formed protrusions 55 that protrude outward in the longitudinal direction of the holder 50 from the bottom 54 that is the bottom of the recess 53.

[0025] In this configuration, the worker can fix the accumulator 20 to the compressor body 10 as follows. That is, when fixing the accumulator 20 to the compressor body 10, the worker first hooks the fulcrum portion 41 of the band 40 onto one of the folded-back portions 52 of the holder 50, as shown in Fig. 3. The worker then bends the band 40 using the fulcrum portion 41 of the band 40 as a fulcrum, and arranges the band 40 so that it is wrapped around the outer peripheral surface of the accumulator 20.

[0026] 2, the worker hooks the locking portion 42 of the band 40 onto one of the folded portions 52 of the holder 50. At this time, the worker positions the locking portion 42 inside the recessed portion 53, i.e., inside the protruding portion 55. This causes the locking portion 42 to fit inside the recessed portion 53, thereby restricting horizontal and vertical movement of the locking portion 42, and as a result, the accumulator 20 is fixed to the compressor body 10.

[0027] Furthermore, the worker can remove the accumulator 20 from the compressor body 10 by performing the above-described procedure in reverse. That is, when removing the accumulator 20 from the compressor body 10, the worker holds the periphery of the locking portion 42 in the state shown in FIG. 2 and moves the locking portion 42 in a direction away from the holder 50 to open the band 40. Then, as shown in FIG. 3, the locking portion 42 is released from the recess 53. This releases the lock of the locking portion 42, and the accumulator 20 becomes removable from the compressor body 10.

[0028] Here, the operation of hooking or detaching the locking portion 42 of the band 40 onto or from the folded portion 52 of the holder 50 requires elastic deformation of the entire band 40 using the fulcrum portion 41 as a fulcrum, and therefore requires a relatively large force. Therefore, the holder 50 of this embodiment is formed symmetrically with respect to the center of the holder 50 in the longitudinal direction. This allows the worker to hook the fulcrum portion 41 and the locking portion 42 of the band 40 onto either of the two folded portions 52 of the holder 50. Therefore, the worker can change the attachment direction of the band 40 to suit their dominant hand.

[0029] That is, when attaching the band 40 to the holder 50 and fixing the accumulator 20 to the compressor body 10, the worker generally performs the work from, for example, the side of the accumulator 20 opposite the compressor body 10, i.e., the right side of the paper in Figures 1 to 3. In this case, for example, if the worker is right-handed, the worker will hook the fulcrum portion 41 of the band 40 onto the folded portion 52 on the left side facing the holder 50, i.e., the lower side of the paper in Figure 3, as shown in Figure 3, and then hook the locking portion 42 of the band 40 onto the folded portion 52 on the right side facing the holder 50, i.e., the upper side of the paper in Figure 3. In this case, the worker can easily handle the locking portion 42 with his or her right hand, which is his or her dominant hand.

[0030] On the other hand, if the worker is left-handed, the worker will hook the fulcrum portion 41 of the band 40 onto the folded portion 52 on the right side facing the holder 50, i.e., on the upper side of the paper in Fig. 3, in the opposite direction to that shown in Fig. 3, and then hook the locking portion 42 of the band 40 onto the folded portion 52 on the left side facing the holder 50, i.e., on the lower side of the paper in Fig. 3. In this case, the worker can easily handle the locking portion 42 with his / her left hand, which is his / her dominant hand.

[0031] Thus, with the accumulator fixing mechanism 30 of this embodiment, whether the worker is right-handed or left-handed, the worker can easily handle the locking portion 42 with his or her dominant hand. As a result, work can be easily performed with the dominant hand, and work errors can be reduced.

[0032] According to the embodiment described above, the fixing mechanism 30 is for fixing the accumulator 20 to the side of the compressor body 10. The fixing mechanism 30 includes a band 40 and a holder 50. The band 40 is formed in a long strip shape. The holder 50 is fixed to the compressor body 10. The holder 50 fixes the accumulator 20 to the compressor body 10 by holding folded portions 52, which are both end portions of the band 40 arranged along the outer periphery of the accumulator 20.

[0033] The holder 50 has a fixed portion 51, a folded portion 52, and a recessed portion 53. The fixed portion 51 is a portion that is fixed to the outer peripheral surface of the compressor body 10. The folded portion 52 is provided on at least one end side of the holder 50, and is formed in a shape that extends toward the accumulator 20 side and is folded back toward the compressor body 10 side. The recessed portion 53 is formed by cutting out an end of the folded portion 52.

[0034] Here, the principle by which the folded portion 52 comes off the recessed portion 53 due to vibration will be described with reference to Figure 6 as well. Note that the two-dot chain lines A and B in Figure 6 show the state in which the folded portion 52 is vibrating. Also, the two-dot chain line C in Figure 6 shows the state in which the folded portion 52 is resting on the protruding portion 55. In the following description, the widthwise dimension of the holder 50 at the recessed portion 53 is referred to as the recessed portion width dimension D1, the widthwise dimension of the end of the holder 50 is referred to as the end width dimension D2, and the longitudinal dimension of the holder 50 at the recessed portion 53 is referred to as the recessed portion depth dimension L.

[0035] As shown in FIG. 6, the widthwise dimension W of the band 40, i.e., the widthwise dimension W of the locking portion 42, is set to be slightly smaller than the recess width dimension D1 so that the locking portion 42 can easily fit into the recess 53, and at the same time, so that the locking portion 42 does not rattle significantly relative to the recess 53.

[0036] Here, if band 40 is not completely fixed to holder 50, for example, because locking portion 42 is not fitted deeply into recess 53, or if compressor 1 is subjected to large vibrations during transportation or operation, the vibrations will cause folded portion 52 to vibrate, for example, as shown by two-dot chain lines A and B in Fig. 6. In this case, if depth dimension L of recess 53 is small compared to the vibration amplitude of folded portion 52, folded portion 52 will ride up on protrusion 55, as shown by two-dot chain line C in Fig. 6.

[0037] If vibration continues with folded portion 52 resting on convex portion 55, the folded portion 52 will move downward due to the vibration and the weight of band 40. Eventually, folded portion 52 will climb over convex portion 55 and come off concave portion 53, which could result in accumulator 20 falling off compressor body 10. In this case, increasing the depth L of concave portion 53 will make it more difficult for locking portion 42 to come off concave portion 53. However, if the depth L of concave portion 53 is made too large, band 40 will need to be significantly deformed when unlocking locking portion 42, which reduces workability.

[0038] Therefore, the inventors of the present application conducted experiments to find an appropriate dimensional relationship between band 40 and holder 50. That is, the inventors of the present application found that by setting the ratio L / D1 of the recess depth dimension L to the recess width dimension D1 to 0.4 or more, folded portion 52 is less likely to ride up onto protruding portion 55 even when folded portion 52 vibrates. Similarly, the inventors of the present application found that by setting the ratio L / D2 of the recess depth dimension L to the end width dimension D2 to 0.3 or more, folded portion 52 is less likely to ride up onto protruding portion 55 even when folded portion 52 vibrates.

[0039] The inventors of the present application also discovered that by setting either or both of the ratio L / D1 of the recess depth dimension L to the recess width dimension D1, or the ratio L / D2 of the recess depth dimension L to the end width dimension D2, to 1.0 or less, it is possible to remove the folded portion 52 from the recess 53 without excessively deforming the band 40.

[0040] The recess depth L of the holder 50 can be set to, for example, 5 mm or more and 10 mm or less. In this case, if the recess depth L is 5 mm, the recess width D1 is set to 5 mm or more and 12.5 mm or less, and the end width D2 is set to 5 mm or more and 50 / 3 mm or less. Also, if the recess depth L is 10 mm, the recess width D1 is set to 10 mm or more and 25 mm or less, and the end width D2 is set to 10 mm or more and 100 / 3 mm or less.

[0041] 3, in this embodiment, the bending depth dimension M1 of the fulcrum portion 41 of the band 40 and the bending depth dimension M2 of the locking portion 42 are set in the range of 0.8 to 1.3 times the recess depth dimension L of the recess 53. This ensures sufficient holding force when the band 40 is attached to the holder 50, while making it easier for the worker to recognize if the attachment state is insufficient due to a work error, thereby reducing work errors during the attachment work.

[0042] According to the embodiment described above, the fixing mechanism 30 is for fixing the accumulator 20 to the side of the compressor body 10. The fixing mechanism 30 includes a band 40 formed in a long, strip-like shape, and a holder 50. The holder 50 is fixed to the compressor body 10. The holder 50 fixes the accumulator 20 by holding the fulcrum portion 41 and the locking portion 42, which are both end portions of the band 40 arranged along the outer periphery of the accumulator 20.

[0043] The holder 50 has a fixed portion 51, a folded portion 52, and a recessed portion 53. The fixed portion 51 is fixed to the outer peripheral surface of the compressor body 10. The folded portion 52 is provided on at least one end side of the holder 50, and is formed in a shape that extends toward the accumulator 20 side and is folded back toward the compressor body 10 side. The recessed portion 53 is formed by cutting out an end of the folded portion 52.

[0044] In the fixing mechanism 30, the ratio L / D1 of the depth dimension L of the recess 53 to the width dimension D1 of the recess 53 is set to 0.4 or more.

[0045] This prevents the folded portion 52 from riding on the protruding portion 55 when the compressor 1 vibrates during transportation or operation, and as a result, prevents the band 40 from coming off the holder 50. This also prevents an incomplete assembly state, such as misalignment during installation.

[0046] In the fixing mechanism 30, the ratio l / D1 of the depth dimension L of the recess 53 to the width dimension D1 of the recess 53 is set to be 0.4 or more.

[0047] This also makes it possible to prevent the folded portion 52 from riding on the protruding portion 55 when the compressor 1 vibrates during transportation or operation, and as a result, to prevent the band 40 from coming off the holder 50.

[0048] The holder 50 of the fixing mechanism 30 can also be modified as shown in Fig. 7, for example. The holder 50A shown in the example of Fig. 7 has a recess 53A. The recess 53A is formed in a trapezoidal shape whose width decreases from both ends of the holder 50A toward the center in the longitudinal direction. In this case, if the width D1 of the recess 53A is the distance between the two protrusions 55, the width D3 of the bottom 54 of the recess 53A is set to be smaller than the width D1 of the recess 53A.

[0049] 1 to 6. Furthermore, because the sides 56 on both sides of the recess 53A are tapered, when fitting the folded portion 52 into the recess 53A and when removing the folded portion 52 from the recess 53A, the worker can easily move the folded portion 52 along the tapered sides 56. This improves the workability when fitting the folded portion 52 into the recess 53A and when removing the folded portion 52 from the recess 53A.

[0050] Although the present disclosure has been described with reference to the embodiments, it is understood that the present disclosure is not limited to the embodiments or structures. The present disclosure also encompasses various modifications and equivalent modifications. In addition, various combinations and forms, including only one element, more than one element, or less than one element, are also within the scope and spirit of the present disclosure. [Explanation of symbols]

[0051] REFERENCE SIGNS LIST 1... compressor, 10... compressor body, 20... accumulator, 30... accumulator fixing mechanism, 40... band, 50, 50A... holder, 51... fixing portion, 52... folded portion, 53, 53A... recess

Claims

1. This is for fixing the accumulator to the side of the compressor body, A band formed in a long strip shape; a holder that is fixed to the compressor body and that holds both end portions of the band that is disposed along the outer periphery of the accumulator, thereby fixing the accumulator; The holder is a fixing portion fixed to an outer peripheral surface of the compressor body; a folded portion provided on at least one end side of the holder, extending toward the accumulator side and folded back toward the compressor main body side; a recess formed by cutting out an end of the folded portion, The ratio (L / D1) of the depth dimension (L) of the recess to the width dimension (D1) of the recess is set to 0.4 or more. Accumulator fixing mechanism.

2. This is for attaching an accumulator to the side of the compressor body, a holder fixed to the compressor body; a band disposed along the outer periphery of the accumulator and removably held by the holder; The holder is a fixing portion fixed to an outer peripheral surface of the compressor body; a folded portion provided on at least one end side of the holder, extending toward the accumulator side and folded back toward the compressor main body side; a recess formed by cutting out an end of the folded portion, The ratio (L / D2) of the depth dimension (L) of the recess to the width dimension (D2) of the end portion is set to 0.3 or more. Accumulator fixing mechanism.

3. The recess is formed in a trapezoidal shape whose width decreases from both ends of the holder toward the center in the longitudinal direction of the holder. The accumulator fixing mechanism according to claim 1 or 2.

4. The compressor body; the accumulator; The accumulator fixing mechanism according to claim 1 or 2; A compressor comprising:

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