JP2021032135A - Compressor and air-conditioning device - Google Patents

Abstract

To provide a compressor which can suppress the generation of resonance.SOLUTION: A compressor 23 according to an embodiment comprises a box body 31, a rotating part, a gas/liquid separator 34 and a holding member 36. The rotating part is accommodated in the box body, and can rotate around a rotation center. The gas/liquid separator separates from the box body in a first direction intersecting with the rotation center. The holding member is positioned between the box body and the gas/liquid separator, attached to the box body and the gas/liquid separator, and has a first portion, a second portion and a first wall. The first portion is supported to the box body and the gas/liquid separator. The second portion intersects with the rotation center from the first portion, and is supported to the box body and the gas/liquid separator in a position separated from a second direction which intersects with the first direction. The first wall is arranged between the first portion and the second portion. A thickness of the first wall contains a component in a third direction along the rotation center.SELECTED DRAWING: Figure 2

Description

Embodiments of the present invention relate to compressors and air conditioners.

For example, the outdoor unit of an air conditioner includes a compressor. The compressor includes, for example, a housing for accommodating a rotary compression mechanism and a gas-liquid separator arranged adjacent to the housing. The housing and the gas-liquid separator are connected to each other via a pipe and held by a holder.

Japanese Unexamined Patent Publication No. 2016-017492

When the compression mechanism operates, vibration is generated in the compressor so that the housing and the gas-liquid separator are relatively displaced. When the frequency of vibration is close to the natural frequency of the compressor, the vibration may be amplified by resonance and noise may be generated.

The compressor according to one embodiment includes a housing, a rotating component, a gas-liquid separator, and a holding member. The rotating component is housed inside the housing and is rotatable around a center of rotation. The gas-liquid separator is separated from the housing in a first direction intersecting the center of rotation. The holding member is located between the housing and the gas-liquid separator and is attached to the housing and the gas-liquid separator, and has a first portion, a second portion, and a first wall. And have. The first portion is supported by the housing and the gas-liquid separator. The second portion is supported by the housing and the gas-liquid separator at a position separated from the first portion in a second direction intersecting the rotation center and intersecting the first direction. .. The first wall is provided between the first portion and the second portion. The thickness direction of the first wall includes components in the third direction along the center of rotation.

FIG. 1 is an exemplary diagram schematically showing the air conditioner of the first embodiment. FIG. 2 is an exemplary perspective view showing the compressor of the first embodiment. FIG. 3 is an exemplary perspective view showing the holder of the first embodiment. FIG. 4 is an exemplary plan view showing a part of the compressor of the first embodiment. FIG. 5 is an exemplary plan view showing the compressor according to the second embodiment. FIG. 6 is an exemplary plan view showing the compressor according to the third embodiment. FIG. 7 is an exemplary perspective view showing the holder of the third embodiment.

(First Embodiment)
Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 4. In this specification, the vertically upper direction is basically defined as the upward direction, and the vertically lower direction is defined as the downward direction. Further, in the present specification, the constituent elements according to the embodiment and the description of the elements may be described in a plurality of expressions. The components and their description are examples and are not limited by the representations herein. The components may be identified by names different from those herein. Also, the components may be described by expressions different from those herein.

FIG. 1 is an exemplary diagram schematically showing the air conditioner 10 of the first embodiment. As shown in FIG. 1, the air conditioner 10 includes an indoor unit 11, an outdoor unit 12, and a pipe 13. The indoor unit 11 has a first heat exchanger 21. The outdoor unit 12 has a second heat exchanger 22 and a compressor 23. The second heat exchanger 22 is an example of a heat exchanger. The first heat exchanger 21, the second heat exchanger 22, and the compressor 23 are connected to each other by a pipe 13.

For example, the refrigerant is supplied from the first heat exchanger 21 to the compressor 23. The compressor 23 supplies the compressed refrigerant to the second heat exchanger 22. The second heat exchanger 22 exchanges heat with the refrigerant supplied by the compressor 23, and supplies the refrigerant to the first heat exchanger 21. The first heat exchanger 21 exchanges heat with the refrigerant supplied by the compressor 23 via the second heat exchanger 22.

FIG. 2 is an exemplary perspective view showing the compressor 23 of the first embodiment. As shown in FIG. 2, the compressor 23 includes a housing 31, a motor 32, a refrigerant compression mechanism 33, a gas-liquid separator (accumulator) 34, two suction pipes 35, a holder 36, and a band 37. And have. The holder 36 is an example of a holding member.

The housing 31 is made of metal, for example, and is formed in a substantially cylindrical shape extending along the central axis Ax. The material and shape of the housing 31 are not limited to this example. For example, the housing 31 may be eccentric from the central axis Ax. The central axis Ax is an example of the center of rotation. In this embodiment, the central axis Ax extends in the substantially vertical direction. The central axis Ax may extend in a direction different from the vertical direction.

Hereinafter, the direction parallel to the central axis Ax is referred to as an axial direction, the direction orthogonal to the central axis Ax is referred to as a radial direction, and the direction rotating around the central axis Ax is referred to as a circumferential direction. The axial direction includes an upward direction and a downward direction. The axial direction is an example of the third direction. The radial direction includes a plurality of directions orthogonal to the central axis Ax. The circumferential direction includes a clockwise direction and a counterclockwise direction around the central axis Ax.

The housing 31 has an outer surface 41, an upper surface 42, and a discharge pipe 43. The outer surface 41 is an example of the first outer surface. The outer surface 41 is a substantially cylindrical surface extending along the central axis Ax, and faces outward in the radial direction of the housing 31. The outer surface 41 may be eccentric from the central axis Ax. The upper surface 42 is located at the end of the housing 31 in the upward direction and faces substantially upward. The discharge pipe 43 projects from the upper surface 42 and communicates between the inside and the outside of the housing 31. The discharge pipe 43 is connected to, for example, the second heat exchanger 22.

The motor 32 is housed inside the housing 31. The motor 32 has a stator 51 and a rotor 52. The rotor 52 is an example of a rotating component. By applying a voltage to the winding of the stator 51, the rotor 52 rotates around the central axis Ax.

The refrigerant compression mechanism 33 has a first cylinder 61 and a second cylinder 62. The first cylinder 61 and the second cylinder 62 each have a rolling piston and a vane that is pressed by a spring and back pressure to partition the inside of the cylinder into a compression chamber on the high pressure side and a suction chamber on the low pressure side. The rolling piston is an example of a rotating component.

The rolling piston is eccentrically arranged from the central axis Ax and is connected to the rotor 52 via a component such as a shaft. When the motor 32 rotates the rotor 52, the rolling piston rotates eccentrically. The eccentric rotating rolling piston compresses the refrigerant in the cylinder and supplies it to the discharge pipe 43.

The phase of the rolling piston inside the first cylinder 61 and the phase of the rolling piston inside the second cylinder 62 are shifted by 180 ° from each other. That is, the compressor 23 of the present embodiment is a twin rotary compressor, and the two cylinders can cancel each other's vibrations. The compressor 23 is not limited to the twin rotary compressor, and may be a compressor of another type.

The gas-liquid separator 34 is separated from the housing 31 in the separation direction Da. The separation direction Da is a direction orthogonal to the central axis Ax and is one direction included in the radial direction. The separation direction Da is an example of the first direction. The first direction may be another direction that intersects the central axis Ax.

The gas-liquid separator 34 has an outer surface 71, an upper surface 72, a lower surface 73, a suction pipe 74, and a cushioning material 75. The outer surface 71 is a substantially cylindrical surface extending substantially parallel to the central axis Ax, and faces the outside of the gas-liquid separator 34. The upper surface 72 is located at the end of the gas-liquid separator 34 in the upward direction and faces substantially upward. The lower surface 73 is located at the end of the gas-liquid separator 34 in the downward direction and faces substantially downward. The suction pipe 74 projects from the upper surface 72 and communicates the inside and the outside of the gas-liquid separator 34. The suction pipe 74 is connected to, for example, the first heat exchanger 21.

The cushioning material 75 is made of an elastomer such as synthetic rubber. The cushioning material 75 is a band formed in an annular shape. The shape of the cushioning material 75 is not limited to this example. The cushioning material 75 is wrapped around the outer surface 71 and covers at least a part of the outer surface 71.

The cushioning material 75 has an outer surface 75a. The outer surface 75a is an example of the second outer surface and the first curved surface. By winding the cushioning material 75 around the cylindrical outer surface 71, the outer surface 75a of the cushioning material 75 has a curved surface formed in a cylindrical shape. The outer surface 41 of the housing 31 and the outer surfaces 71, 75a of the gas-liquid separator 34 face each other in the separation direction Da with a gap.

The suction pipe 35 is fixed to the outer surface 41 of the housing 31 and the lower surface 73 of the gas-liquid separator 34, for example, by brazing. One suction pipe 35 communicates the gas-liquid separator 34 with the first cylinder 61. The other suction pipe 35 communicates the gas-liquid separator 34 with the second cylinder 62.

Refrigerant is supplied from the first heat exchanger 21 to the inside of the gas-liquid separator 34 through the suction pipe 74. For example, a liquid refrigerant may be supplied to the inside of the gas-liquid separator 34. The liquid refrigerant remains inside the gas-liquid separator 34. On the other hand, the gaseous refrigerant is supplied to the first cylinder 61 and the second cylinder 62 via the suction pipe 35.

The holder 36 is located between the outer surface 41 of the housing 31 and the outer surface 75a of the gas-liquid separator 34. The holder 36 is attached to the housing 31 and the gas-liquid separator 34. Therefore, the housing 31 and the gas-liquid separator 34 are attached to each other via the holder 36.

FIG. 3 is an exemplary perspective view showing the holder 36 of the first embodiment. As shown in FIG. 3, the holder 36 can be manufactured, for example, by bending (pressing) a metal plate. This reduces the cost of the holder 36. The material and manufacturing method of the holder 36 are not limited to this example.

The holder 36 has a first portion 81, a second portion 82, and an upper wall 83. The upper wall 83 is an example of the first wall. The first portion 81 has a first side wall 85. The first side wall 85 is an example of a second wall. The second portion 82 has a second side wall 86. The second side wall 86 is an example of a third wall.

As mentioned above, the holder 36 is made of a metal plate. The upper wall 83 and the first side wall 85 are formed by bending the holder 36 (metal plate) at the first bent portion B1. Therefore, the upper wall 83 and the first side wall 85 are connected to each other at the first bent portion B1. Further, the holder 36 (metal plate) is bent at the second bent portion B2 to form the upper wall 83 and the second side wall 86. Therefore, the upper wall 83 and the second side wall 86 are connected to each other at the second bent portion B2.

In the example shown in FIG. 3, the first bent portion B1 and the second bent portion B2 connected to the upper wall 83, which is the first wall, are the first side wall 85 (first portion 81) and the second bent portion B2, respectively. An example is shown which is provided on the upper part of the second side wall 86 (the upper part of the second portion 82). The present embodiment is not limited to this, and for example, the first bent portion B1 and the second bent portion B2 connected to the first wall are the first side wall 85 (first portion 81) and the first side wall, respectively. It may be provided in the lower part or the middle part of the side wall 86 (the upper part of the second part 82) of the second side wall 86. The first bent portion B1 and the second bent portion B2 may also be referred to as a connecting portion when provided in the intermediate portion between the first side wall 85 and the second side wall 86. When the first bent portion B1 and the second bent portion B2 are provided below the first side wall 85 (first portion 81) and the second side wall 86 (upper part of the second portion 82), respectively. , The first wall becomes a lower wall, and has a configuration in which the example shown in FIG. 3 is turned upside down.

The first bent portion B1 and the second bent portion B2 extend substantially parallel to the separation direction Da. That is, the first bent portion B1 and the second bent portion B2 are parallel and extend in a direction (horizontal direction) orthogonal to the central axis Ax. The direction in which the first bent portion B1 and the second bent portion B2 extend is not limited to this example.

The upper wall 83 is formed in a plate shape extending in a direction (horizontal direction) orthogonal to the central axis Ax. The posture of the upper wall 83 is not limited to this example. The upper wall 83 has an upper surface 83a, a lower surface 83b, a first edge 83c, and a second edge 83d. The lower surface 83b is an example of the surface.

The upper surface 83a is a substantially flat surface that extends in the horizontal direction and faces upward. The lower surface 83b is provided on the upper wall 83 on the opposite side of the upper surface 83a. The lower surface 83b is a substantially flat surface that extends in the horizontal direction and faces downward. The upper surface 83a and the lower surface 83b may be curved or have irregularities.

The lower surface 83b faces downward, which is a direction including an axial component. The direction including the component in the axial direction is a direction different from the direction orthogonal to the axial direction. The direction orthogonal to the axial direction does not include the axial component.

The direction including the component in the axial direction includes the axial direction and the direction obliquely inclined with respect to the axial direction (diagonal direction). The oblique direction can be decomposed into a component in the axial direction and a component in the direction orthogonal to the axial direction.

As described above, in the present embodiment, the upper surface 83a faces upward (axial direction), and the lower surface 83b faces downward (axial direction). However, the upper surface 83a and the lower surface 83b are not limited to this example, and may be oriented in an oblique direction.

The thickness direction Dt1 of the upper wall 83 includes an axial component. In the present embodiment, the thickness direction Dt1 of the upper wall 83 coincides with the axial direction. The thickness direction Dt1 of the upper wall 83 is not limited to this example, and may be an oblique direction.

The thickness direction Dt1 includes at least one of a direction from the upper surface 83a to the lower surface 83b and a direction from the lower surface 83b to the upper surface 83a. In this embodiment, the distance between the upper surface 83a and the lower surface 83b is substantially constant. Therefore, the thickness direction Dt1 is also the normal direction of the upper surface 83a and the lower surface 83b. Further, the upper surface 83a and the lower surface 83b face in the thickness direction Dt1.

The length (thickness) of the upper wall 83 in the thickness direction Dt1 is shorter than the length (width) of the upper wall 83 in the separation direction Da. Further, the length (thickness) of the upper wall 83 in the thickness direction Dt1 is shorter than the length of the upper wall 83 in the longitudinal direction Dl. As described above, in the present embodiment, the thickness direction Dt1 is the direction in which the shortest dimension of the upper wall 83 can be obtained.

The longitudinal direction Dl is an example of a second direction and a direction that intersects the axial direction and the radial direction. The longitudinal direction Dl is a direction that intersects the thickness direction Dt1 (axial direction and central axis Ax) (orthogonal in the present embodiment) and intersects the separation direction Da (radial direction) (orthogonal in the present embodiment). .. Further, the separation direction Da and the longitudinal direction Dl are included in the horizontal direction and are directions along the upper surface 83a and the lower surface 83b of the upper wall 83.

FIG. 4 is an exemplary plan view showing a part of the compressor 23 of the first embodiment. As shown in FIG. 4, the first edge 83c is provided at one end of the upper wall 83 in the separation direction Da. The first edge 83c faces the outer surface 41 of the housing 31. In the present embodiment, the first edge 83c is formed in a substantially arc shape and is separated from the outer surface 41. The first edge 83c may be formed in another shape or may come into contact with the outer surface 41.

The second edge 83d is provided on the other edge of the upper wall 83 in the separation direction Da. The second edge 83d faces the outer surface 75a of the gas-liquid separator 34. In the present embodiment, the second edge 83d is formed in a substantially arc shape and is separated from the outer surface 75a. The second edge 83d may be formed in another shape or may come into contact with the outer surface 75a.

In the upper wall 83, the area of the upper surface 83a is wider than the first edge 83c and wider than the second edge 83d. Further, the area of the lower surface 83b is wider than that of the first edge 83c and wider than that of the second edge 83d.

As shown in FIG. 3, the first side wall 85 projects downward from one end of the lower surface 83b in the longitudinal direction Dl. The first side wall 85 extends in the separation direction Da between the housing 31 and the gas-liquid separator 34. The first side wall 85 may extend in another direction.

As shown in FIG. 4, the first side wall 85 includes a first inner surface 85a, a first outer surface 85b, a first joint edge 85c, and a first contact edge 85d. Have. The first contact edge 85d is an example of a second curved surface.

The first inner side surface 85a is a substantially flat surface facing the longitudinal direction Dl. The first outer surface 85b is a substantially flat surface located on the opposite side of the first inner surface 85a and facing the longitudinal direction Dl. The first inner surface 85a and the first outer surface 85b may be curved or have irregularities.

The thickness direction Dt2 of the first side wall 85 faces in a direction intersecting the separation direction Da (orthogonal in the present embodiment) and intersecting the thickness direction Dt1 of the upper wall 83 (orthogonal in the present embodiment). The thickness direction Dt2 of the first side wall 85 is not limited to this example, and may include, for example, an axial component.

The thickness direction Dt2 includes at least one of a direction from the first inner surface 85a to the first outer surface 85b and a direction from the first outer surface 85b to the first inner surface 85a. In the present embodiment, the distance between the first inner surface 85a and the first outer surface 85b is substantially constant. Therefore, the thickness direction Dt2 is also the normal direction of the first inner surface 85a and the first outer surface 85b. Further, the first inner surface surface 85a and the first outer surface surface 85b face in the thickness direction Dt2.

The length (thickness) of the first side wall 85 in the thickness direction Dt2 is shorter than the length of the first side wall 85 in the separation direction Da. Further, the length (thickness) of the first side wall 85 in the thickness direction Dt2 is shorter than the length (width) of the first side wall 85 in the axial direction. As described above, in the present embodiment, the thickness direction Dt2 is the direction in which the shortest dimension of the first side wall 85 can be obtained.

The first joint edge 85c is the edge of the first side wall 85 located at one end of the first side wall 85 in the separation direction Da. The first joint edge 85c comes into contact with the outer surface 41 of the housing 31 and is fixed to the outer surface 41 by welding, for example. As a result, the first side wall 85 is supported by the housing 31. The first joint edge 85c may be in contact with the housing 31 so as to be separable.

The first side wall 85 projects downward (axially) from the lower surface 83b of the upper wall 83. Therefore, the first joint edge 85c extends substantially parallel to the outer surface 41 of the housing 31 and makes line contact with the outer surface 41. As a result, the first side wall 85 is stably supported by the housing 31.

The first joint edge 85c may be formed in a curved surface along a cylindrical outer surface 41. In other words, the first joint edge 85c may have a radius of curvature substantially equal to that of the outer surface 41 at each portion in contact with the outer surface 41. In this case, the first joint edge 85c comes into surface contact with the outer surface 41. Further, in this case, the outer surface 41 may have a curved surface formed of an elastomer such as synthetic rubber.

The first contact edge 85d is the edge of the first side wall 85 located at the other end of the first side wall 85 in the separation direction Da. The first contact edge 85d comes into contact with the outer surface 75a of the gas-liquid separator 34. As a result, the first side wall 85 is supported by the gas-liquid separator 34. The first contact edge 85d may be fixed to the gas-liquid separator 34.

The first contact edge 85d is formed in a curved surface along a cylindrical outer surface 75a. In other words, the first contact edge 85d has a radius of curvature substantially equal to the outer surface 75a at each portion in contact with the outer surface 75a. Therefore, the first contact edge 85d comes into surface contact with the outer surface 75a.

As shown in FIG. 3, a first mounting portion 85e is provided on the first side wall 85. The first mounting portion 85e is, for example, a hole penetrating the first side wall 85 and opens to the first inner surface 85a and the first outer surface 85b. The first mounting portion 85e is not limited to this example.

The second side wall 86 projects downward from the other end of the lower surface 83b in the longitudinal direction Dl. Therefore, the second side wall 86 is provided at a position separated from the first side wall 85 in the longitudinal direction Dl. The second side wall 86 extends in the separation direction Da between the housing 31 and the gas-liquid separator 34. The second side wall 86 may extend in another direction.

As shown in FIG. 4, the second side wall 86 includes a second inner surface 86a, a second outer surface 86b, a second joint edge 86c, and a second contact edge 86d. Have. The second contact edge 86d is an example of a third curved surface.

The second inner surface 86a is a substantially flat surface facing the longitudinal direction Dl. The first inner surface 85a and the second inner surface 86a face each other with a gap. The second outer surface 86b is a substantially flat surface located on the opposite side of the second inner surface 86a and facing the longitudinal direction Dl. The second inner surface 86a and the second outer surface 86b may be curved or have irregularities.

The thickness direction Dt3 of the second side wall 86 faces in a direction intersecting the separation direction Da (orthogonal in the present embodiment) and intersecting the thickness direction Dt1 of the upper wall 83 (orthogonal in the present embodiment). In this embodiment, the thickness direction Dt3 coincides with the thickness direction Dt2. The thickness direction Dt3 of the second side wall 86 is not limited to this example, and may include, for example, an axial component.

The thickness direction Dt3 includes at least one of a direction from the second inner surface 86a toward the second outer surface 86b and a direction from the second outer surface 86b toward the second inner surface 86a. In the present embodiment, the distance between the second inner surface 86a and the second outer surface 86b is substantially constant. Therefore, the thickness direction Dt3 is also the normal direction of the second inner surface 86a and the second outer surface 86b. Further, the second inner surface surface 86a and the second outer surface surface 86b face in the thickness direction Dt3.

The length (thickness) of the second side wall 86 in the thickness direction Dt3 is shorter than the length of the second side wall 86 in the separation direction Da. Further, the length (thickness) of the second side wall 86 in the thickness direction Dt3 is shorter than the length (width) of the second side wall 86 in the axial direction. As described above, in the present embodiment, the thickness direction Dt3 is the direction in which the shortest dimension of the second side wall 86 can be obtained.

The second joint edge 86c is the edge of the second side wall 86 located at one end of the second side wall 86 in the separation direction Da. The second joint edge 86c comes into contact with the outer surface 41 of the housing 31 and is fixed to the outer surface 41 by welding, for example. As a result, the second side wall 86 is supported by the housing 31. The second joint edge 86c may be in contact with the housing 31 so as to be separable.

The second side wall 86 projects downward (axially) from the lower surface 83b of the upper wall 83. Therefore, the second joint edge 86c extends substantially parallel to the outer surface 41 of the housing 31 and makes line contact with the outer surface 41. As a result, the second side wall 86 is stably supported by the housing 31.

The holder 36 is attached to the housing 31 by fixing the first joint edge 85c and the second joint edge 86c to the outer surface 41 by welding. The holder 36 may be attached to the housing 31 by another method such as adhesion.

The second joint edge 86c may be formed in a curved surface shape along the cylindrical outer surface 41. In other words, the second joint edge 86c may have a radius of curvature substantially equal to that of the outer surface 41 at each portion in contact with the outer surface 41. In this case, the second joint edge 86c comes into surface contact with the outer surface 41. Further, in this case, the outer surface 41 may have a curved surface formed of an elastomer such as synthetic rubber.

The second contact edge 86d is the edge of the second side wall 86 located at the other end of the second side wall 86 in the separation direction Da. The second contact edge 86d contacts the outer surface 75a of the gas-liquid separator 34. As a result, the second side wall 86 is supported by the gas-liquid separator 34. The second contact edge 86d may be fixed to the gas-liquid separator 34.

The second contact edge 86d is formed in a curved surface along a cylindrical outer surface 75a. In other words, the second contact edge 86d has a radius of curvature substantially equal to the outer surface 75a at each portion in contact with the outer surface 75a. Therefore, the second contact edge 86d comes into surface contact with the outer surface 75a.

The first contact edge 85d and the second contact edge 86d come into contact with the outer surface 75a of the cushioning material 75 made of the elastomer. As a result, it is possible to suppress the generation of noise due to the contact between the metal members.

As shown in FIG. 3, a second mounting portion 86e is provided on the second side wall 86. The second mounting portion 86e is, for example, a hole penetrating the second side wall 86, and opens to the second inner side surface 86a and the second outer surface 86b. The second mounting portion 86e is not limited to this example.

The upper wall 83 is provided between the end of the first side wall 85 in the upward direction and the second side wall 86 in the upward direction. As a result, the first side wall 85 and the second side wall 86 are supported by each other via the upper wall 83.

The band 37 shown in FIG. 4 is formed of, for example, metal. The band 37 is wound around the outer surface 75a of the gas-liquid separator 34. As a result, it is possible to suppress the generation of noise due to the contact between the metal members.

One end of the band 37 is attached to the first attachment 85e. The other end of the band 37 is attached to the second attachment 86e. As a result, the holder 36 is attached to the gas-liquid separator 34. The holder 36 may be attached to the gas-liquid separator 34 by another method such as welding or adhesion.

When the compressor 23 operates, the rotor 52 of the motor 32 and the rolling piston inside the refrigerant compression mechanism 33 rotate around the central axis Ax, and the refrigerant is compressed inside the first and second cylinders 61 and 62. To. The resulting pressure fluctuation becomes an exciting force that rotates the housing 31 around the central axis Ax.

The compressor 23 has a structure in which a housing 31 having a mass and a gas-liquid separator 34 are roughly connected via a suction pipe 35 functioning as a spring and a holder 36. Therefore, there are a plurality of vibration modes in which the housing 31 and the gas-liquid separator 34 are relatively displaced. The vibration mode includes, for example, a vibration mode in which the gas-liquid separator 34 twists with respect to the housing 31 in the circumferential direction or the longitudinal direction Dl of the central axis Ax.

In the present embodiment, the natural frequency of the vibration mode in which the gas-liquid separator 34 is twisted in the circumferential direction or the longitudinal direction Dl of the central axis Ax with respect to the housing 31 is the same as that of the housing 31 of the compressor 23. It is the lowest of the natural frequencies of the vibration mode in which the gas-liquid separator 34 is relatively displaced. Therefore, the vibration mode is referred to as the lowest-order vibration mode, and the lowest-order vibration mode will be described below. The vibration of the compressor 23 is not limited to this example.

Generally, when the frequency of the exciting force is close to the natural frequency of the vibration mode of the compressor 23, the vibration of the compressor 23 is amplified by resonance and noise is generated. As described above, the compressor 23 of the present embodiment is a twin rotary compressor. The exciting force in this case contains a component with a large amplitude at a frequency twice the rotation speed (operating frequency) of the rotor 52, and when operated at a high rotation speed, it approaches the natural frequency of the lowest order vibration mode. Resonance amplification may occur. Of the frequency components included in the exciting force, the component having a large amplitude is not limited to twice the rotation speed. For example, when the compressor 23 is a single rotary compressor, the amplitude of the frequency component equal to (1 times) the rotation speed of the rotor 52 becomes large.

The natural frequency of the lowest order vibration mode in the compressor 23 is affected by various factors such as the rigidity of the holder 36 and the mass of the gas-liquid separator 34. By reducing the mass of the gas-liquid separator 34, the natural frequency of the lowest order vibration mode increases, but there is a design limit to reducing the weight of the gas-liquid separator 34. On the other hand, by increasing the rigidity of the holder 36, it is possible to efficiently increase the natural frequency of the lowest order vibration mode. If the natural frequency of the lowest order vibration mode rises, the frequency component with a large amplitude included in the exciting force during operation at a high rotation speed will be separated from the natural frequency of the lowest order vibration mode, and the vibration and noise due to resonance will be affected. It is possible to suppress the occurrence.

As shown by arrows in FIG. 4, in the lowest-order vibration mode, the gas-liquid separator 34 twists with respect to the housing 31 in the circumferential direction or the longitudinal direction Dl of the central axis Ax. Therefore, the first portion 81 and the second portion 82 of the holder 36 supported by the housing 31 and the gas-liquid separator 34, for example, in the circumferential direction or the longitudinal direction with the position supported by the housing 31 as a fulcrum. A bending moment that bends to Dl is generated.

An upper wall 83 is provided between the first portion 81 and the second portion 82. Therefore, the first portion 81 and the second portion 82 are supported by each other via the upper wall 83, and bending due to the bending moment is suppressed.

Further, the upper wall 83 has a lower surface 83b whose thickness direction Dt1 includes an axial component and is oriented in a direction containing an axial component. That is, the upper wall 83 is a plate-shaped member having a spread along the circumferential direction and the longitudinal direction Dl. Therefore, the moment of inertia of area of the upper wall 83 with respect to the lowest order vibration mode is large.

The bending moment generated by the lowest order vibration mode is a bending moment in a direction parallel to the lower surface 83b of the upper wall 83 (in-plane direction). Therefore, the upper wall 83 is difficult to bend due to the bending moment generated by the lowest order vibration mode.

Further, the length of the upper wall 83 in the separation direction Da is longer than the length in the axial direction. Therefore, the connecting portion between the upper wall 83 and the first portion 81 and the second portion 82 becomes long. On the other hand, of the first portion 81 and the second portion 82, the portion that is not connected to the upper wall 83 and can be bent by the bending moment like a cantilever is shortened.

For example, for the above reasons, the rigidity of the holder 36 in the lowest order vibration mode is increased. The above description is an exemplary description of improving the rigidity of the holder 36 in the lowest order vibration mode. The rigidity of the holder 36 of the present embodiment in the lowest order vibration mode may be improved for a reason different from the above description.

In the present embodiment, by improving the rigidity of the holder 36 in the lowest order vibration mode, the frequency of the vibration component having a large amplitude included in the exciting force during operation at a high rotation speed is set to be higher than the natural frequency of the lowest order vibration mode. Can also be set high. Therefore, the frequency of the vibration component having a large amplitude included in the exciting force during operation at a high rotation speed may be separated from the natural frequency of the lowest order vibration mode, and the compressor 23 may be amplified and noisy due to resonance. It is suppressed.

In the compressor 23 according to the first embodiment described above, the holder 36 has a first portion 81, a second portion 82, and an upper wall 83. The first portion 81 is supported by the housing 31 and the gas-liquid separator 34. The second portion 82 is supported by the housing 31 and the gas-liquid separator 34 at a position separated from the first portion 81 in the longitudinal direction Dl intersecting the central axis Ax and intersecting the separation direction Da. The upper wall 83 is provided between the first portion 81 and the second portion 82. The thickness direction Dt1 of the upper wall 83 includes an axial component along the central axis Ax. For example, the compressor 23 vibrates in a vibration mode in which the rotor 52 rotates around the central axis Ax so that the gas-liquid separator 34 twists with respect to the housing 31 in the circumferential direction of the central axis Ax. Sometimes. In the vibration mode, a force in the circumferential direction of the central axis Ax acts on the first portion 81 and the second portion 82 from the housing 31 and the gas-liquid separator 34. However, the upper wall 83 is provided between the first portion 81 and the second portion 82. As a result, the first portion 81 and the second portion 82 are supported by each other via the upper wall 83. Further, the thickness direction Dt1 of the upper wall 83 contains an axial component. Therefore, the moment of inertia of area of the upper wall 83 with respect to the vibration mode becomes large. Further, in the vibration mode, the portions of the first portion 81 and the second portion 82 that are not supported by the upper wall 83 and receive the bending moment are shortened. As a result, the rigidity of the holder 36 with respect to the vibration mode is improved, and the natural frequency of the vibration mode is increased. Therefore, the occurrence of resonance in the vibration mode is suppressed, and the vibration and noise of the compressor 23 are reduced.

The upper wall 83 has a lower surface 83b facing the thickness direction Dt1 of the upper wall 83. The first portion 81 has a first side wall 85 that projects from the lower surface 83b and extends between the housing 31 and the gas-liquid separator 34. As a result, the connecting portion between the upper wall 83 and the first portion 81 extends in the direction in which the first side wall 85 extends. Therefore, in the vibration mode, the portion of the first portion 81 that is not supported by the upper wall 83 and receives the bending moment is shortened, and the rigidity of the holder 36 with respect to the vibration mode is improved. Further, the contact portion or the joint portion between the housing 31 and the gas-liquid separator 34 and the first side wall 85 extends in the direction in which the first side wall 85 projects. Therefore, the force acting on the first portion 81 is dispersed in the direction in which the first side wall 85 protrudes, and the rigidity of the holder 36 is improved.

The second portion 82 has a second side wall 86 that projects from the lower surface 83b and extends between the housing 31 and the gas-liquid separator 34. As a result, the connecting portion between the upper wall 83 and the second portion 82 extends in the direction in which the second side wall 86 extends. Therefore, in the vibration mode, the portion of the second portion 82 that is not supported by the upper wall 83 and receives the bending moment is shortened, and the rigidity of the holder 36 with respect to the vibration mode is improved. Further, the contact portion or the joint portion between the housing 31 and the gas-liquid separator 34 and the second side wall 86 extends in the direction in which the second side wall 86 protrudes. Therefore, the force acting on the second portion 82 is dispersed in the direction in which the second side wall 86 protrudes, and the rigidity of the holder 36 is improved.

The first side wall 85 and the second side wall 86 are fixed to at least one of the housing 31 and the gas-liquid separator 34. As a result, the holder 36 is prevented from falling off from the housing 31 and the gas-liquid separator 34. Further, the first side wall 85 and the second side wall 86 project from the portion where the first side wall 85 and the second side wall 86 and at least one of the housing 31 and the gas-liquid separator 34 are fixed. Extend in the direction of As a result, the force acting on the first portion 81 and the second portion 82 is dispersed, and the rigidity of the holder 36 is improved.

The upper wall 83 faces the outer surface 41 of the housing 31 and has a first edge 83c separated from the outer surface 41. This prevents the holder 36 from being supported by the housing 31 at a portion different from the first portion 81 and the second portion 82, for example due to dimensional tolerances.

The upper wall 83 faces the outer surface 75a of the gas-liquid separator 34 and has a second edge 83d separated from the outer surface 75a. This prevents the holder 36 from being supported by the gas-liquid separator 34 at a portion different from the first portion 81 and the second portion 82, for example due to dimensional tolerances.

The outer surface 75a has a curved surface that contains an elastomer and is formed in a cylindrical shape. The first portion 81 has a curved first contact edge 85d that comes into contact with the outer surface 75a and along the outer surface 75a. The second portion 82 comes into contact with the outer surface 75a and has a curved second contact edge 86d along the outer surface 75a. This prevents the first portion 81 and the second portion 82 from damaging the outer surface 75a containing the elastomer.

The thickness direction Dt1 of the upper wall 83 coincides with the axial direction. As a result, the moment of inertia of area of the upper wall 83 with respect to the vibration mode becomes larger than that in the case where the thickness direction Dt1 of the upper wall 83 and the axial direction are different. Therefore, the rigidity of the holder 36 with respect to the vibration mode is improved.

(Second embodiment)
The second embodiment will be described below with reference to FIG. In the following description of the plurality of embodiments, the components having the same functions as the components already described may be designated by the same reference numerals as those described above, and the description may be omitted. .. Further, the plurality of components with the same reference numerals do not necessarily have all the functions and properties in common, and may have different functions and properties according to each embodiment.

FIG. 5 is an exemplary plan view showing the compressor 23 according to the second embodiment. As shown in FIG. 5, the first side wall 85 of the second embodiment has a first curved portion 85f instead of the first contact edge 85d of the first embodiment.

The first curved portion 85f is a part of the first side wall 85 located on the opposite side of the first joint edge 85c and bent away from the second side wall 86. The first curved portion 85f makes line contact with the outer surface 75a of the gas-liquid separator 34. The portion of the first curved portion 85f that comes into contact with the outer surface 75a is formed in a curved surface shape. Therefore, damage to the outer surface 75a of the cushioning material 75 is suppressed.

The second side wall 86 of the second embodiment has a second curved portion 86f instead of the second contact edge 86d of the first embodiment. The second curved portion 86f is a part of the second side wall 86 located on the opposite side of the second joint edge 86c and bent away from the first side wall 85. The second curved portion 86f makes line contact with the outer surface 75a of the gas-liquid separator 34. However, the portion of the second curved portion 86f that comes into contact with the outer surface 75a is formed in a curved surface shape. Therefore, damage to the outer surface 75a of the cushioning material 75 is suppressed.

The band 37 has a fastening end portion 37a and a hooking end portion 37b. The fastening end 37a is one end of the band 37. The fastening end portion 37a is attached to the first curved portion 85f by, for example, a bolt 101 and a nut 102. Further, the hook end portion 37b is the other end portion of the band 37. The hook end portion 37b is hooked on, for example, a hole or a notch provided in the second curved portion 86f, and is attached to the second curved portion 86f.

In the compressor 23 of the second embodiment described above, the first side wall 85 is supported by the gas-liquid separator 34 at the first curved portion 85f. Further, the second side wall 86 is supported by the gas-liquid separator 34 at the second curved portion 86f. As described above, the portion where the first portion 81 and the second portion 82 are supported by the gas-liquid separator 34 may be a portion different from the edges of the first side wall 85 and the second side wall 86. The portion where the first portion 81 and the second portion 82 are supported by the housing 31 may also be different from the edges of the first side wall 85 and the second side wall 86.

(Third Embodiment)
The third embodiment will be described below with reference to FIGS. 6 and 7. FIG. 6 is an exemplary plan view showing the compressor 23 according to the third embodiment. FIG. 7 is an exemplary perspective view showing the holder 36 of the third embodiment.

As shown in FIG. 7, the holder 36 of the third embodiment is a metal plate extending in the separation direction Da and the longitudinal direction Dl (horizontal direction). As shown in FIG. 6, the holder 36 is located between the housing 31 and the gas-liquid separator 34. The holder 36 of the third embodiment has a first portion 121, a second portion 122, and a wall portion 123. The wall portion 123 is an example of the first wall.

The first portion 121 is a part of the holder 36 located at one end of the holder 36 in the longitudinal direction Dl and extending roughly in the separation direction Da. FIG. 6 schematically shows the first portion 121 by a chain double-dashed line.

One end 121a of the first portion 121 in the separation direction Da comes into contact with the outer surface 41 of the housing 31. Further, the other end portion 121b of the first portion 121 in the separation direction Da comes into contact with the outer surface 71 of the gas-liquid separator 34. As a result, the first portion 121 is supported by the housing 31 and the gas-liquid separator 34.

The second portion 122 is a part of the holder 36 located at the other end of the holder 36 in the longitudinal direction Dl and extending approximately in the separation direction Da. Therefore, the second portion 122 is separated from the first portion 121 in the longitudinal direction Dl. FIG. 6 schematically shows the second portion 122 by a chain double-dashed line.

One end 122a of the second portion 122 in the separation direction Da comes into contact with the outer surface 41 of the housing 31. Further, the other end 122b of the second portion 122 in the separation direction Da comes into contact with the outer surface 71 of the gas-liquid separator 34. As a result, the second portion 122 is supported by the housing 31 and the gas-liquid separator 34.

The wall portion 123 is a part of the holder 36 provided between the first portion 121 and the second portion 122. The wall portion 123 is continuous with the first portion 121 and the second portion 122 in the longitudinal direction Dl.

The thickness direction Dt1 of the wall portion 123 includes an axial component. For example, the thickness direction Dt1 coincides with the axial direction. Further, in the third embodiment, the thickness direction of the first portion 121 and the second portion 122 also includes the component in the axial direction and coincides with the axial direction.

As shown in FIG. 7, the wall portion 123 has an upper surface 123a, a lower surface 123b, a first edge 123c, and a second edge 123d. The upper surface 123a is a substantially flat surface facing upward (axial direction). The lower surface 123b is provided on the wall portion 123 on the opposite side of the upper surface 123a, and is a substantially flat surface facing downward (axial direction).

As shown in FIG. 6, the first edge 123c is located at one end of the wall portion 123 in the separation direction Da and faces the outer surface 41 of the housing 31. The first edge 123c is formed in an arc shape along the outer surface 41 and comes into contact with the outer surface 41.

The first edge 123c is continuous with the end 121a of the first portion 121 and the end 122a of the second portion 122. The first edge 123c, the end 121a of the first portion 121, and the end 122a of the second portion 122 are fixed to the outer surface 41 of the housing 31 by welding, for example.

The second edge 123d is located at the other end of the wall portion 123 in the separation direction Da and faces the outer surface 71 of the gas-liquid separator 34. The second edge 123d is formed in an arc shape along the outer surface 71 and comes into contact with the outer surface 71.

The second edge 123d is continuous with the end 121b of the first portion 121 and the end 122b of the second portion 122. The second edge 123d, the end 121b of the first portion 121, and the end 122b of the second portion 122 are fixed to the outer surface 71 of the gas-liquid separator 34, for example, by welding.

In the holder 36, the area of the upper surface 123a is wider than the first edge 123c and wider than the second edge 123d. Further, the area of the lower surface 123b is wider than that of the first edge 123c and wider than that of the second edge 123d.

In the compressor 23 of the third embodiment described above, the thickness direction Dt1 of the wall portion 123 has an axial component. Therefore, as in the first embodiment, the rigidity of the holder 36 is improved, and the natural frequency of the lowest order vibration mode is increased. Therefore, the occurrence of resonance in the vibration mode is suppressed, and the vibration and noise of the compressor 23 are reduced. That is, the shape of the holder 36 is not limited to the substantially U-shape of the first embodiment, and may be one plate of the third embodiment or another shape.

In the above plurality of embodiments, the compressor 23 is included in the air conditioner 10. However, the compressor 23 is not limited to this example, and may be included in a device different from the air conditioner 10 or may be used alone.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

10 ... air conditioner, 22 ... second heat exchanger, 23 ... compressor, 31 ... housing, 34 ... gas-liquid separator, 36 ... holder, 41 ... outer surface, 52 ... rotor, 71 ... outer surface, 75a ... outer surface , 81 ... 1st part, 82 ... 2nd part, 83 ... upper wall, 83b ... lower surface, 83c ... first edge, 83d ... second edge, 85 ... first side wall, 85d ... first Contact edge, 86 ... second side wall, 86d ... second contact edge, 121 ... first part, 122 ... second part, 123 ... wall part, Ax ... central axis, Da ... separation direction , Dt1 ... thickness direction, Dl ... longitudinal direction.

Claims (10)

With the housing
Rotating parts that are housed inside the housing and can rotate around the center of rotation,
A gas-liquid separator separated from the housing in the first direction intersecting the center of rotation,
It is located between the housing and the gas-liquid separator and is attached to the housing and the gas-liquid separator.
A first portion supported by the housing and the gas-liquid separator, and
A second portion supported by the housing and the gas-liquid separator at a position separated from the first portion in a second direction intersecting the center of rotation and intersecting the first direction.
A first wall provided between the first portion and the second portion and containing a component in a third direction whose thickness direction is along the center of rotation.
With a holding member,
Compressor equipped with. The first wall has a surface facing the thickness direction of the first wall.
The first portion has a second wall that projects from the surface and extends between the housing and the gas-liquid separator.
The compressor of claim 1. The compressor of claim 2, wherein the second portion has a third wall that projects from the surface and extends between the housing and the gas-liquid separator. The compressor according to claim 3, wherein the second wall and the third wall are fixed to at least one of the housing and the gas-liquid separator. The housing has a first outer surface and
The first wall has a first edge that faces the first outer surface and is separated from the first outer surface.
A compressor according to any one of claims 1 to 4. The gas-liquid separator has a second outer surface and has a second outer surface.
The first wall has a second edge that faces the second outer surface and is separated from the second outer surface.
The compressor of claim 5. One of the first outer surface and the second outer surface has a first curved surface containing an elastomer and formed in a cylindrical shape.
The first portion comes into contact with the first curved surface and has a second curved surface along the first curved surface.
The second portion comes into contact with the first curved surface and has a third curved surface along the first curved surface.
The compressor of claim 6. The compressor according to any one of claims 1 to 7, wherein the thickness direction of the first wall coincides with the third direction. With the housing
Rotating parts that are housed inside the housing and can rotate around the center of rotation,
A gas-liquid separator separated from the housing in the radial direction of the center of rotation,
It is located between the housing and the gas-liquid separator and is attached to the housing and the gas-liquid separator.
The first wall and
A surface provided on the first wall and oriented in a direction containing an axial component of the center of rotation.
A second wall protruding from the surface and supported by the housing and the gas-liquid separator,
A third wall that protrudes from the surface and is supported by the housing and the gas-liquid separator at a position that intersects the axial direction and is separated from the second wall in the radial direction.
With a holding member
Compressor equipped with. The compressor according to any one of claims 1 to 9.
A heat exchanger that exchanges heat with the refrigerant supplied by the compressor,
An air conditioner equipped with.

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