JP2024022665A - Compressor, and refrigeration cycle device - Google Patents

Abstract

To provide a compressor and a refrigeration cycle device in which power lines can be efficiently connected at the time of manufacturing.SOLUTION: A compressor (2) comprises a closed container (11), a compression mechanism (13), an electric motor (12), and a pair of sealing terminals (18) and (19) provided side by side in the closed container (11). Three first plate-like terminals (75) of each of the sealing terminals (18) and (19) are arranged on respective sides of a triangle D so as to draw the triangle D, and respective ventral surfaces (75f) face one another. In the pair of sealing terminals (18) and (19), one angle Co of a triangle D1 drawn by the three first plate-like terminals (75) of one of the sealing terminals (18) and (19) and one angle Co of a triangle D2 drawn by the three first plate-like terminals (75) of the other of the sealing terminals (18) and (19) face each other.SELECTED DRAWING: Figure 4

Description

The present invention relates to a compressor and a refrigeration cycle device.

Compressors are known that include a compression mechanism and an electric motor that drives the compression mechanism. This conventional compressor motor includes multiple systems, for example, two systems of three-phase windings. Therefore, the conventional compressor is equipped with two systems of lead wires and two systems of sealed terminals. Each sealed terminal is electrically connected to a respective three-phase winding via a respective lead wire.

At least six power lines are connected to these two systems of sealed terminals inside the compressor, and at least six power lines are connected to the outside of the compressor. Although the wiring of these many power lines is complicated, if excessive bending stress is applied to the power lines, there is a risk that the durability of the power lines will decrease.

Therefore, the conventional compressor includes a first sealed terminal and a second sealed terminal. These sealed terminals have three pins that are electrically connected to the electric motor, have the same shape, and are arranged side by side in the sealed container. The three pins of the first sealed terminal and the three pins of the second sealed terminal are relative to a straight line passing through the center of the discharge pipe of the compressor and the midpoint of the first sealed terminal and the second sealed terminal. , are arranged asymmetrically.

JP2012-082776A

By the way, when the displacement volume is expanded to improve the performance of the compressor, the compression load increases. To meet this increased compression load, the motor requires more current. Such an increase in current increases the temperature of the terminal that connects the power line to the sealed terminal when it is energized. It is difficult for Faston terminals used in conventional compressors to cope with such temperature rises during energization.

Therefore, by replacing the Faston terminal with a type of terminal in which large plate-shaped terminals are brought into surface contact and fastened with screws, it is possible to suppress the temperature rise of the terminal that connects the power line to the sealed terminal.

In order to connect this type of plate-shaped terminal and the sealed terminal, a terminal block to which screws are fastened is required. When a conventional compressor is provided with a plurality of sealed terminals, each sealed terminal is provided with a terminal block. That is, a plurality of terminal blocks are arranged side by side in the same way as sealed terminals.

However, with the arrangement of a pair of sealed terminals in a conventional compressor, it is difficult to arrange a pair of terminal blocks side by side without interfering with each other. Further, it is considered that the work efficiency in fastening the screws to each terminal is extremely low, or it is difficult to fasten the screws to each terminal.

Therefore, the present invention makes it possible to securely screw the sealed terminal and the power line terminal by installing a terminal block, and to connect the power line to the sealed terminal without applying excessive bending stress to the power line. To provide a compressor and a refrigeration cycle device that can be efficiently connected to a power line during manufacturing.

In order to solve the above-mentioned problems, a compressor according to an embodiment of the present invention includes: a closed container; a compression mechanism section that compresses a refrigerant accommodated in the closed container and introduced into the closed container; an electric motor having a cylindrical stator fixed to the inner surface of the stator, and a rotor disposed inside the stator to generate a rotational driving force for the compression mechanism; Equipped with sealed terminals. Each of the sealed terminals has three plate-shaped terminals arranged outside the sealed container and electrically connected to the electric motor. One surface of each of the plate-shaped terminals is arranged along each side of the triangle, and along the other two sides, so that a virtual plane including the one surface draws a triangle across the three plate-shaped terminals. It faces one surface of the plate-shaped terminal. Any one corner of the triangle drawn by the three plate terminals of one of the sealed terminals faces any one corner of the triangle drawn by the three plate terminals of the other sealed terminal. .

Further, the compressor includes a pair of terminal blocks provided at each of the sealed terminals. The terminal block is T-shaped having a vertical bar portion and a horizontal bar portion, and the horizontal bar portions of each of the pair of terminal blocks face each other, and the vertical bar portions move away from each other. Holding the three power wires so that the three power wires are arranged to extend and are connected to each of the plate terminals of the corresponding sealed terminals and are routed in a direction away from the other terminal block. .

Preferably, each of the sealed terminals of the compressor according to the embodiment of the present invention has three second plate-shaped terminals arranged inside the sealed container and electrically connected to the electric motor. . For each of the sealed terminals, the front and back surfaces of one of the second plate-shaped terminals are formed by any one of three imaginary lines that substantially divide a circle centered on the center of gravity of the triangle into thirds into a fan shape. Along the first imaginary line, the front and back surfaces of the other two second plate terminals are substantially perpendicular to the second imaginary line, which is the other two of the three imaginary lines. Preferably, the one imaginary line intersects at a location farther from the center line of the sealed container when viewed from the pair of sealed terminals.

Further, the refrigeration cycle device according to the embodiment of the present invention connects the compressor, the radiator, the expansion device, and the heat absorber; refrigerant piping for circulating refrigerant.

According to an embodiment of the present invention, it is possible to securely screw the sealed terminal and the power line terminal by installing the terminal block, and to connect the power line to the sealed terminal without applying excessive bending stress to the power line. It is possible to provide a compressor and a refrigeration cycle device that can efficiently connect a power line during manufacturing.

1 is a schematic diagram of a refrigeration cycle device and a compressor according to an embodiment of the present invention. FIG. 1 is a schematic diagram of a sealed terminal of a compressor according to an embodiment of the present invention, viewed from above. FIG. 1 is a schematic diagram of a sealed terminal of a compressor according to an embodiment of the present invention, viewed from below. FIG. 1 is a schematic diagram of a sealed terminal and a terminal block of a compressor according to an embodiment of the present invention, viewed from above. FIG. 1 is a vertical cross-sectional view of a sealed terminal and a terminal block of a compressor according to an embodiment of the present invention. FIG. 1 is a plan view of a terminal block of a compressor according to an embodiment of the present invention.

Embodiments of a compressor and a refrigeration cycle device according to the present invention will be described with reference to FIGS. 1 to 6. In addition, the same code|symbol is attached|subjected to the same or equivalent structure in several drawings.

FIG. 1 is a schematic diagram of a refrigeration cycle device and a compressor according to an embodiment of the present invention.

As shown in FIG. 1, a refrigeration cycle device 1 according to the present embodiment is, for example, an air conditioner. The refrigeration cycle device 1 includes a hermetic rotary compressor 2 (hereinafter simply referred to as "compressor 2"), a radiator 3, an expansion device 5, a heat absorber 6, an accumulator 7, and refrigerant piping. It is equipped with 8 and. The refrigerant pipe 8 sequentially connects the compressor 2, the radiator 3, the expansion device 5, the heat absorber 6, and the accumulator 7, and allows the refrigerant to flow therethrough. The radiator 3 is also called a condenser. The heat absorber 6 is also called an evaporator.

The compressor 2 sucks in the refrigerant that has passed through the heat absorber 6 through the refrigerant pipe 8 , compresses it, and discharges the high-temperature and high-pressure refrigerant to the radiator 3 through the refrigerant pipe 8 .

The compressor 2 includes a cylindrical closed container 11 placed vertically, an open-wound electric motor 12 (hereinafter simply referred to as "motor 12") housed in the upper half of the closed container 11, and a closed container. A compression mechanism 13 housed in the lower half of the 11, a rotation shaft 15 that transmits the rotational driving force of the electric motor 12 to the compression mechanism 13, a main bearing 16 that rotatably supports the rotation shaft 15, and a main bearing 16. and a sub bearing 17 that rotatably supports the rotating shaft 15 in cooperation with the rotating shaft 15.

The center line of the closed container 11 placed vertically extends in the vertical direction. The airtight container 11 includes a cylindrical body 11a extending in the vertical direction, a head plate 11b that closes the upper end of the body, and a head plate 11c that closes the lower end of the body.

A discharge pipe 8a for discharging refrigerant to the outside of the closed container 11 is connected to the upper end plate 11b of the closed container 11. The discharge pipe 8a is connected to the refrigerant pipe 8. Further, on the upper end plate 11b of the airtight container 11, there are a pair of sealed terminals 18 and 19 (Sealed terminals) that guide the electric power supplied to the electric motor 12 from the outside to the inside of the airtight container 11, and a pair of terminal blocks 22 and 23. (Terminal block) is provided. Each terminal block 22, 23 is provided in each sealed terminal 18, 19. A plurality of power lines 25 that are electrically connected to the respective sealed terminals 18 and 19 to supply power are fixed to each of the terminal blocks 22 and 23. The power line 25 is a so-called lead wire.

The electric motor 12 generates a driving force that rotates the compression mechanism 13. The electric motor 12 is arranged above the compression mechanism 13. The electric motor 12 includes a cylindrical stator 31 fixed to the inner surface of the airtight container 11, a rotor 32 disposed inside the stator 31 to generate rotational driving force for the compression mechanism 13, and a rotor 32 drawn out from the stator 31. A plurality of lead wires 33 are electrically connected to the pair of sealed terminals 18 and 19.

The rotor 32 includes a rotor core 35 having a magnet housing hole (not shown) and a permanent magnet (not shown) accommodated in the magnet housing hole. The rotor 32 is fixed to the rotating shaft 15. The rotation center line C of the rotor 32 and the rotating shaft 15 substantially coincides with the center line of the stator 31. Further, the rotation center line C of the rotor 32 and the rotating shaft 15 substantially coincides with the center line of the closed container 11.

The plurality of lead wires 33 are power lines that supply power to the stator 31 through the sealed terminals 18 and 19, and are so-called lead wires. A plurality of lead wires 33 are wired depending on the type of electric motor 12. In this embodiment, six lead wires 33 are wired.

In addition to the open winding type, the electric motor 12 may be an electric motor having multiple systems, for example, two systems of three-phase windings, such as a conventional compressor motor.

The rotating shaft 15 connects the electric motor 12 and the compression mechanism 13. The rotating shaft 15 transmits the rotational driving force generated by the electric motor 12 to the compression mechanism 13.

An intermediate portion 15a of the rotating shaft 15 connects the electric motor 12 and the compression mechanism 13, and is rotatably supported by a main bearing 16. A lower end portion 15b of the rotating shaft 15 is rotatably supported by a sub bearing 17. The main bearing 16 and the sub-bearing 17 are also part of the compression mechanism 13. In other words, the rotating shaft 15 passes through the compression mechanism 13.

Further, the rotating shaft 15 includes a plurality of eccentric portions 36, for example, three eccentric portions 36 between the intermediate portion 15a supported by the main bearing 16 and the lower end portion 15b supported by the sub bearing 17. Each eccentric portion 36 is a disk or a cylinder having a center that does not match the rotation center line of the rotating shaft 15.

The compression mechanism 13 compresses the refrigerant introduced into the closed container 11. When the electric motor 12 rotationally drives the rotating shaft 15, the compression mechanism 13 sucks gaseous refrigerant from the refrigerant pipe 8, compresses it, and discharges the compressed high temperature and high pressure refrigerant into the closed container 11.

The compression mechanism 13 is a rotary type having multiple cylinders, for example, three cylinders. The compression mechanism 13 includes a plurality of cylinders 42 each having a circular cylinder chamber 41, and a plurality of annular rollers 43 disposed within each cylinder chamber 41. Note that the compression mechanism 13 may be a single-cylinder rotary type.

Here, the cylinder 42 closest to the electric motor 12 is referred to as the first cylinder 42A, the cylinder 42 furthest from the electric motor 12 is referred to as the third cylinder 42C, and the cylinder 42 disposed between the first cylinder 42A and the third cylinder 42C is referred to as the first cylinder 42A. It is assumed that the second cylinder 42B.

The compression mechanism 13 includes a main bearing 16 that covers the upper surface of the first cylinder 42A, a first partition plate 45A that blocks the lower surface of the first cylinder 42A and the upper surface of the second cylinder 42B, and a lower surface of the second cylinder 42B and the third cylinder. It includes a second partition plate 45B that closes the upper surface of the third cylinder 42C, and a sub bearing 17 that closes the lower surface of the third cylinder 42C.

In other words, the upper surface of the first cylinder 42A is closed by the main bearing 16. The lower surface of the first cylinder 42A is closed by a first partition plate 45A. The upper surface of the second cylinder 42B is closed by a first partition plate 45A. The lower surface of the second cylinder 42B is closed by a second partition plate 45B. The upper surface of the third cylinder 42C is closed by a second partition plate 45B. The lower surface of the third cylinder 42C is closed by a secondary bearing 17.

That is, the first cylinder 42A is sandwiched between the main bearing 16 and the first partition plate 45A. The second cylinder 42B is sandwiched between the first partition plate 45A and the second partition plate 45B. The third cylinder 42C is sandwiched between the second partition plate 45B and the secondary bearing 17.

The main bearing 16 and the first partition plate 45A are collectively fixed to the second cylinder 42B by a fastening member 46 such as a bolt. That is, the main bearing 16 and the first partition plate 45A are fastened together to the second cylinder 42B by the fastening member 46. The main bearing 16 is provided with a first discharge valve mechanism 51A that discharges the refrigerant compressed in the cylinder chamber 41 of the first cylinder 42A, and a first discharge muffler 52 that covers the first discharge valve mechanism 51A. ing. The first discharge valve mechanism 51A controls the discharge port when the pressure difference between the pressure in the cylinder chamber 41 of the first cylinder 42A and the pressure in the first discharge muffler 52 reaches a predetermined value due to the compression action of the compression mechanism 13. (not shown) is opened to discharge the compressed refrigerant into the first discharge muffler 52.

The second partition plate 45B is provided with a second discharge valve mechanism 51B that discharges the refrigerant compressed within the cylinder chamber 41 of the second cylinder 42B, and a discharge chamber 53. The main bearing 16, the first cylinder 42A, the first partition plate 45A, and the second cylinder 42B have a first hole (not shown) that connects the discharge chamber 53 of the second partition plate 45B to the inside of the first discharge muffler 52. ing. The second discharge valve mechanism 51B operates at a discharge port (not shown) when the pressure difference between the pressure in the cylinder chamber 41 of the second cylinder 42B and the pressure in the discharge chamber 53 reaches a predetermined value due to the compression action of the compression mechanism 13. ) is opened to discharge the compressed refrigerant into the discharge chamber 53. The refrigerant discharged into the discharge chamber 53 is discharged into the first discharge muffler 52 through the first hole. The refrigerant discharged into the first discharge muffler 52 through the first hole joins the refrigerant compressed in the first cylinder 42A.

The secondary bearing 17, the third cylinder 42C, and the second partition plate 45B are collectively fixed to the second cylinder 42B by a fastening member 55 such as a bolt. That is, the secondary bearing 17, the third cylinder 42C, and the second partition plate 45B are jointly fastened to the second cylinder 42B by the fastening member 55. The secondary bearing 17 is provided with a third discharge valve mechanism 51C that discharges the refrigerant compressed in the cylinder chamber 41 of the third cylinder 42C, and a second discharge muffler 56 that covers the third discharge valve mechanism 51C. ing. The main bearing 16, the first cylinder 42A, the first partition plate 45A, the second cylinder 42B, the second partition plate 45B, and the third cylinder 42C connect the space inside the second discharge muffler 56 to the inside of the first discharge muffler 52. It has a second hole 57. The third discharge valve mechanism 51C closes the discharge port when the pressure difference between the pressure in the cylinder chamber 41 of the third cylinder 42C and the pressure in the second discharge muffler 56 reaches a predetermined value due to the compression action of the compression mechanism 13. (not shown) is opened to discharge the compressed refrigerant into the second discharge muffler 56. The refrigerant discharged into the second discharge muffler 56 passes through the second hole 57 and is discharged into the first discharge muffler 52. The refrigerant discharged into the first discharge muffler 52 joins the refrigerant compressed in the first cylinder 42A and the refrigerant compressed in the second cylinder 42B.

The first discharge muffler 52 has a discharge hole (not shown) that connects the inside and outside of the first discharge muffler 52 . The compressed refrigerant discharged into the first discharge muffler 52 is discharged into the closed container 11 through the discharge hole.

Note that the first hole may be a part of the second hole 57. Further, the discharge chamber 53 of the second partition plate 45B may be connected within the second discharge muffler 56. That is, the first hole may be connected within the second discharge muffler 56.

The first cylinder 42A is fixed to a frame 58, which is fixed to the closed container 11 at a plurality of locations by welding, for example, spot welding, with fastening members 59 such as bolts. That is, the frame 58 supports the rotor 32 of the electric motor 12, the compression mechanism 13, and the rotating shaft 15 in the closed container 11 via the first cylinder 42A. The center of gravity of the rotor 32 of the electric motor 12, the compression mechanism 13, and the rotating shaft 15 in the height direction of the closed container 11 is located within the range of the thickness of the frame 58 (the dimension in the height direction of the compressor 2). Preferably.

The plurality of suction pipes 61 penetrate the closed container 11 and are connected to the cylinder chamber 41 of each cylinder 42 . Each cylinder 42 has a suction hole that is connected to the respective suction pipe 61 and reaches the cylinder chamber 41 . The first suction pipe 61A is connected to the cylinder chamber 41 of the first cylinder 42A. The second suction pipe 61B is connected to the cylinder chamber 41 of the second cylinder 42B. The third suction pipe 61C is connected to the cylinder chamber 41 of the third cylinder 42C. Note that the number of the plurality of suction pipes 61 may be the same as the number of the plurality of cylinders 42 as in the present embodiment, or the number of the plurality of suction pipes 61 may be the same as the number of the plurality of cylinders 42, or the number of the plurality of suction pipes 61 may be smaller than the number of the plurality of cylinders 42, which are shared by two cylinders 42. good. For example, the second suction pipe 61B may be connected to the second partition plate 45B. The second partition plate 45B includes a refrigerant passage (which is connected to the second partition plate 45B, branches into the cylinder chamber 41 of the second cylinder 42B, and the cylinder chamber 41 of the third cylinder 42C, and connects to the two cylinder chambers 41). (not shown) is provided.

The lower part of the closed container 11 is filled with lubricating oil 62. Most of the compression mechanism 13 is immersed in the lubricating oil 62 inside the closed container 11.

The accumulator 7 prevents liquid refrigerant that has not been completely gasified by the heat absorber 6 from being sucked into the compressor 2.

Next, the sealed terminals 18 and 19 will be explained.

FIG. 2 is a schematic diagram of a sealed terminal of a compressor according to an embodiment of the present invention, viewed from above.

FIG. 3 is a schematic diagram of the sealed terminal of the compressor according to the embodiment of the present invention, viewed from below.

FIG. 4 is a schematic diagram of a sealed terminal and a terminal block of a compressor according to an embodiment of the present invention, viewed from above.

FIG. 5 is a vertical cross-sectional view of a sealed terminal and a terminal block of a compressor according to an embodiment of the present invention.

As shown in FIGS. 2 to 5, a pair of sealed terminals 18 and 19 of the compressor 2 according to this embodiment are arranged side by side on the dome-shaped end plate 11b of the closed container 11.

First, one sealed terminal 18 will be explained. Note that the other sealed terminal 19 has substantially the same structure and the same shape as the one sealed terminal 18. Therefore, a description of the other sealed terminal 19 will be omitted. Further, for the sake of simplicity, one sealed terminal 18 will be hereinafter referred to as the "first sealed terminal 18", and the other sealed terminal 19 will be hereinafter referred to as the "second sealed terminal 19".

The first sealed terminal 18 is provided with a substantially disc-shaped main body 71, three pins 72 penetrating the front and back of the main body 71, and each pin 72, and is arranged outside the airtight container 11. It includes three flat plate-shaped first plate terminals 75 and three flat plate-shaped second plate terminals 76 provided on each pin 72 and arranged inside the closed container 11.

2 and 3 are views of the pair of sealed terminals 18, 19 viewed from the direction in which the pins 72 of the pair of sealed terminals 18, 19 extend. 2 and 3 show the sealed terminals 18 and 19 from a direction inclined with respect to a plan view of the compressor 2.

The main body portion 71 holds three pins 72 and three first plate terminals 75 while insulating them from each other. The three pins 72 and the three first plate terminals 75 are electrically connected to the motor 12.

The three pins 72 are arranged at the vertices of an equilateral triangle d whose center of gravity is the center point O of the disc-shaped main body 71. In other words, the three pins 72 are arranged around the center point O at every central angle of 120 degrees. A virtual line passing through each pin 72 from the center point O is defined as a line segment L1. In other words, the three line segments L1 substantially divide the circle into thirds in a fan shape.

Each first plate terminal 75 is connected to a respective power line 25. Each first plate-shaped terminal 75 has a ventral surface 75f as one surface and a rear surface 75r as the other surface. The ventral surface 75f and the rear surface 75r are in a relationship of front and back sides of the first plate-shaped terminal 75. The ventral surface 75f of each first plate-shaped terminal 75 is joined to the corresponding pin 72.

As shown in FIG. 2, the ventral surface 75f of each first plate-shaped terminal 75 is shaped like a triangle D such that a virtual plane including the ventral surface 75f draws a triangle D as a whole of the three first plate-shaped terminals 75. along each side and facing the ventral surfaces 75f of the other two first plate-shaped terminals 75. In other words, the three first plate-shaped terminals 75 are arranged on each side of the triangle D, with their ventral surfaces 75f facing each other.

The ventral surface 75f and the back surface 75r of each first plate-shaped terminal 75 are substantially orthogonal to the corresponding line segment L1. Here, the "corresponding line segment L1" is a line segment L1 that passes through the pin 72 to which each first plate-shaped terminal 75 is joined, and that passes through each first plate-shaped terminal 75 from the front and back. Minute L1. That is, each first plate-shaped terminal 75 is arranged at the center of the corresponding side of the triangle D.

Triangle D includes a second triangle d drawn by three pins 72. Each vertex of the second triangle d is tangent to the midpoint of the corresponding side of triangle D or closest to the midpoint of the corresponding side of triangle D.

Further, the three first plate terminals 75 are arranged so that the three first plate terminals 75 collectively form a hexagon when the ends of the adjacent first plate terminals 75 are connected with an imaginary straight line. has been done. The virtual straight line connecting the ends of one first plate-shaped terminal 75 and the other two first plate-shaped terminals 75 is in a relationship of opposite sides of this hexagon.

Each second plate-shaped terminal 76 is connected to each lead wire 33. Each second plate-shaped terminal 76 has a ventral surface 76f as one surface and a rear surface 76r as the other surface. The ventral surface 76f and the rear surface 76r are in a relationship of front and back sides of the second plate-shaped terminal 76. The ventral surface 76f of each second plate-shaped terminal 76 is joined to the corresponding pin 72.

As shown in FIG. 3, the ventral surface 76f and the rear surface 76r of one second plate-shaped terminal 76a are along the first imaginary line L1a, which is one of the line segments L1, and the other two second plate-shaped terminals The ventral surface 76f and the back surface 76r of 76b and 76c are substantially perpendicular to two second imaginary lines L1b and L1c, which are the other two corresponding line segments L1. In other words, the second plate-shaped terminal 76a is along the virtual plane VP2a that bisects the acute angle formed by the virtual plane VP2b containing the second plate-shaped terminal 76b and the virtual plane VP2c containing the second plate-shaped terminal 76c. .

Next, the relationship between the pair of sealed terminals 18 and 19 will be explained.

The pair of sealed terminals 18 and 19 are opposed to each other with a plane P passing through the midpoint of the pair of sealed terminals 18 and 19 and the center line of the sealed container 11 in between.

The corner Co of any one of the triangles D1 and D2 drawn by the three first plate terminals 75 of the sealed terminals 18 and 19 on one side is It faces the corner Co of one of the triangles D1 and D2 to be drawn. In other words, any one corner Co of the triangle D1 drawn by the three first plate terminals 75 of the first sealed terminal 18 is the corner Co of any one of the triangle D2 drawn by the three first plate terminals 75 of the second sealed terminal 19. They face one corner Co. Moreover, any one corner Co of the triangle D2 drawn by the three first plate-shaped terminals 75 of the second sealed terminal 19 is any one of the triangles D1 drawn by the three first plate-shaped terminals 75 of the first sealed terminal 18. They face one corner Co.

Note that a pair of opposite corners Co in the pair of triangles D1 and D2 may be separated without overlapping as shown in FIG. 2, or may be overlapping.

Therefore, any one side of the second triangle d drawn by the three pins 72 of one sealed terminal 18, 19 is different from any one side of the second triangle d drawn by the three pins 72 of the other sealed terminal 18, 19. or facing each other on one side. In other words, any one side of the second triangle d drawn by the three pins 72 of the first sealed terminal 18 is equal to any one side of the second triangle d drawn by the three pins 72 of the second sealed terminal 19. are facing each other. Also, any one side of the second triangle d drawn by the three pins 72 of the second sealed terminal 19 is equal to any one side of the second triangle d drawn by the three pins 72 of the first sealed terminal 18. are facing each other.

Moreover, the first imaginary line L1a of the pair of sealed terminals 18 and 19 intersects at a location farther than the center line of the sealed container 11 when viewed from the pair of sealed terminals 18 and 19. In other words, the second plate-shaped terminal 76a having the ventral surface 76f and the rear surface 76r along the first imaginary line L1a is the pin 72a closest to the center line of the sealed container 11 among the pins 72 of the respective sealed terminals 18 and 19. It is set in.

Note that it is preferable that the pair of sealed terminals 18 and 19 have a plane-symmetric relationship with the plane P as a plane of symmetry. The pair of sealed terminals 18 and 19 may be asymmetrical as long as one corner Co of the triangle D1 and one corner C of the triangle D2 are arranged facing each other. In this case, it is preferable that the pair of sealed terminals 18 and 19 have opposite sides of each corner Co parallel to each other.

Next, a pair of terminal blocks 22 and 23 provided on each sealed terminal 18 and 19 will be explained.

FIG. 6 is a plan view of the terminal block of the compressor according to the embodiment of the present invention.

First, one terminal block 22 will be explained. Note that the other terminal block 23 has substantially the same structure and the same shape as the one terminal block 22. Therefore, description of the other terminal block 23 will be omitted. Furthermore, for the sake of simplicity, one terminal block 22 will be hereinafter referred to as the "first terminal block 22", and the other terminal block 23 will be hereinafter referred to as the "second terminal block 23". The first terminal block 22 is provided on the first sealed terminal 18 , and the second terminal block 23 is provided on the second sealed terminal 19 .

The first terminal block 22 has a T-shape when viewed from the direction in which the three pins 72 of the first sealed terminal 18 extend, and has a thickness in the direction in which the three pins 72 extend. The first terminal block 22 includes three terminal placement holes 81 , three plate-shaped terminal receiving parts 82 , and three wiring holding parts 83 .

The two terminal placement holes 81, the two plate-shaped terminal receiving portions 82, and the two wiring holding portions 83 are arranged on the horizontal bar portion 85 of the T-shaped first terminal block 22. Another terminal placement hole 81 , another plate-like terminal receiving portion 82 , and another wiring holding portion 83 are arranged in the vertical bar portion 86 of the T-shaped first terminal block 22 .

Each terminal placement hole 81 has a shape that allows each pin 72 of the first sealed terminal 18 and each first plate terminal 75 to be inserted therethrough. Each terminal arrangement hole 81 is a series of holes through which the pin 72 and the first plate-shaped terminal 75 can be inserted together.

The two terminal placement holes 81 of the horizontal bar portion 85 of the first terminal block 22 are arranged at each end of the horizontal bar portion 85, and the one terminal placement hole 81 of the vertical bar portion 86 of the first terminal block 22 is arranged at each end of the horizontal bar portion 85. , are arranged at the boundary between the horizontal bar portion 85 and the vertical bar portion 86. The boundary between the horizontal bar portion 85 and the vertical bar portion 86 is a connecting portion between the horizontal bar portion 85 and the vertical bar portion 86, and is the root of the vertical bar portion 86. These three terminal arrangement holes 81 are arranged in a triangular D shape corresponding to the three pins 72 of the first sealed terminal 18 and the three first plate terminals 75. Further, these three terminal placement holes 81 are arranged so that the three terminal placement holes 81 as a whole form a hexagon when the ends of the adjacent terminal placement holes 81 are connected with a virtual straight line.

Each of the plate-shaped terminal receiving portions 82 is provided side by side with each of the terminal placement holes 81 . Each plate-shaped terminal receiving portion 82 is arranged outside an imaginary triangle D in which the three terminal arrangement holes 81 are arranged, or outside an imaginary hexagon drawn by the three terminal arrangement holes 81.

Each plate-shaped terminal receiving portion 82 is a concave depression having a shape that allows the first plate-shaped terminal 75 inserted into the terminal placement hole 81 to be bent toward the outside of the triangle D. Each plate-shaped terminal receiving portion 82 has a seating surface on which the first plate-shaped terminal 75 inserted into the terminal placement hole 81 and bent toward the outside of the triangle D is seated. A nut 91 is embedded in the plate-shaped terminal receiving portion 82 . A fastening member 92, such as a screw, is fastened to the nut 91. This fastening member 92 electrically connects a plate-shaped terminal 93 provided at the end of the power line 25 and the first plate-shaped terminal 75, and the first plate-shaped terminal is bent at the plate-shaped terminal receiving portion 82. 75 and the terminal 93 of the power line 25 are fastened together and fixed to the first terminal block 22.

By the way, each first plate-shaped terminal 75 before being bent protrudes beyond the tip of the corresponding pin 72 in the extending direction of the pin 72. Each first plate-shaped terminal 75 has an elongated hole 95 in this protruding portion. The seating positions of the respective first plate terminals 75 bent by the plate terminal receiving portion 82 and seated on the seat surface are not necessarily constant. Therefore, the elongated hole 95 of the first plate-shaped terminal 75 absorbs the variation in the seating position of the first plate-shaped terminal 75 and allows the fastening member 92 to be smoothly fastened to the nut 91.

Each wiring holding portion 83 is a groove extending in the direction in which the vertical bar portion 86 of the T-shaped first terminal block 22 extends. That is, each wiring holding portion 83 is a groove extending downward in a T-shape drawn by the first terminal block 22 . Each wiring holding portion 83 is connected to each plate-shaped terminal receiving portion 82 in series. Each wiring holding part 83 is configured to wire the power line 25 connected to the first plate-shaped terminal 75 at each plate-shaped terminal receiving part 82 in the direction in which the vertical bar part 86 of the T-shaped first terminal block 22 extends. Hold it in place. That is, the wire holding portion 83 of the vertical bar portion 86 of the first terminal block 22 extends in the direction in which the first plate terminal 75 is bent at the corresponding plate terminal receiving portion 82 . The wiring holding portion 83 of the horizontal bar portion 85 of the first terminal block 22 intersects with the bending direction of the first plate-shaped terminal 75 bent at the corresponding plate-shaped terminal receiving portion 82, and extends vertically of the first terminal block 22. The rod portion 86 extends parallel to the direction in which the wire holding portion 83 extends.

Next, the relationship between the pair of terminal blocks 22 and 23 will be explained.

The pair of terminal blocks 22 and 23 face each other with a plane P passing through the midpoint of the pair of sealed terminals 18 and 19 and the center line of the sealed container 11 interposed therebetween.

In one terminal block 22, 23, the three power lines 25 connected to the respective first plate terminals 75 of the corresponding sealed terminals 18, 19 are wired in a direction away from the other terminal block 22, 23. The three power lines 25 are held as shown in FIG. In other words, the first terminal block 22 has three power lines 25 connected to each first plate terminal 75 of the first sealed terminal 18 so that the three power lines 25 are wired in a direction away from the second terminal block 23. hold. The second terminal block 23 also has three power lines 25 connected to each of the first plate terminals 75 of the second sealed terminal 19 so that the three power lines 25 are wired in a direction away from the first terminal block 22. hold.

In other words, the pair of T-shaped terminal blocks 22 and 23 are provided on the pair of sealed terminals 18 and 19, with the horizontal bar portions 85 of the terminal blocks 22 and 23 facing each other. In other words, the vertical bar portions 86 of the pair of terminal blocks 22 and 23 extend in a direction away from each other. Since the wire holding portions 83 of each of the terminal blocks 22 and 23 extend parallel to the extending direction of the vertical bar portion 86 of the corresponding terminal block 22, one of the terminal blocks 22 and 23 is connected to the corresponding sealed terminal 18. , 19 are held in a direction away from the other terminal block 22, 23.

As explained above, the compressor 2 and the refrigeration cycle device 1 according to the present embodiment are configured such that any one corner of the triangle D drawn by the three first plate-shaped terminals 75 of one of the sealed terminals 18 and 19 is The other sealed terminals 18 and 19 face one corner of a triangle D drawn by the three first plate terminals 75.

Therefore, the compressor 2 and the refrigeration cycle device 1 can be bent toward the outside of the triangle D without interfering with the three first plate terminals 75 at one of the sealed terminals 18 and 19. In other words, the compressor 2 and the refrigeration cycle device 1 bend the three first plate-shaped terminals 75 toward the outside of the triangle D without interfering with each other for each of the sealed terminals 18 and 19. It is possible to easily connect the power line 25 having the following.

The compressor 2 and the refrigeration cycle device 1 also connect the pair of sealed terminals 18 and 19 to the three folded first plate terminals 75 of one sealed terminal 18 and 19 and the bent three first plate terminals 75 of the other sealed terminal 18 and 19. The three bent first plate terminals 75 can be arranged as close as possible without interfering with each other. These three first plate terminals 75 are arranged radially every 120 degrees in a bent state. At this time, when looking at the pair of adjacent sealed terminals 18 and 19, the arrangement relationship of the pair of sealed terminals 18 and 19 according to this embodiment is such that the pair of sealed terminals 18 and 19 are brought closest to each other, and the power line 25 is easily connected. It is an excellent mounting form that can be wired to

Therefore, the compressor 2 and the refrigeration cycle device 1 can easily connect the power line 25 having the larger plate-shaped terminal 93 to the pair of sealed terminals 18 and 19. In other words, the compressor 2 and the refrigeration cycle device 1 can easily employ a larger terminal with a larger contact area as the terminal 93 that connects the power line 25 to the pair of sealed terminals 18 and 19. A large current can be easily supplied to the electric motor 12 while avoiding a rise in temperature. In addition, the compressor 2 and the refrigeration cycle device 1 are capable of bending the first plate terminals 75 of the sealed terminals 18 and 19, and the terminal blocks 22 and 23 are installed to connect the sealed terminals 18 and 19 to the power line. 25 terminals 93 can be reliably screwed together. Furthermore, the compressor 2 and the refrigeration cycle apparatus 1 are capable of bending the first plate-shaped terminals 75 of the sealed terminals 18 and 19, and install terminal blocks 22 and 23 to connect the sealed terminals 18 and 19 to the power line. 25 terminals 93 can be easily fastened together from the same direction. This increases the degree of freedom in the wiring route of the power line 25 and makes it possible to connect the power line 25 to the sealed terminals 18 and 19 without applying excessive bending stress to the power line 25.

Furthermore, the compressor 2 and the refrigeration cycle apparatus 1 according to the present embodiment include a pair of terminal blocks 22 and 23 provided at the sealed terminals 18 and 19, respectively. One terminal block 22, 23 is configured such that the three power lines 25 connected to the first plate terminals 75 of the corresponding sealed terminals 18, 19 are routed in a direction away from the other terminal block 22, 23. Holds three power lines 25. Therefore, the compressor 2 and the refrigeration cycle device 1 enable the power line 25 to be connected to the sealed terminals 18 and 19 without applying excessive bending stress to the power line 25, and no excessive stress is applied to the power line 25. In this state, the power lines 25 can be wired without interfering with each other.

Furthermore, the compressor 2 and the refrigeration cycle device 1 according to the present embodiment are arranged so that the first imaginary line L1a intersects at a location farther from the center line of the sealed container 11 when viewed from the pair of sealed terminals 18 and 19. A second plate-shaped terminal 76 is provided. Therefore, the compressor 2 and the refrigeration cycle device 1 can wire the lead wire 33 of the electric motor 12 in the space inside the closed container 11 without excessive stress acting on the lead wire 33. Further, the compressor 2 and the refrigeration cycle device 1 can connect the lead wire 33 of the electric motor 12 to the second plate-shaped terminal 76 without contacting the inner wall surface of the airtight container 11. This protects the lead wire 33 from thermal effects when welding the end plate 11b of the closed container 11 to the body portion 11a, and reduces the risk of wire breakage.

By the way, the terminal provided at the end of the outlet wire 33 is exposed to the refrigerant flowing inside the compressor 2. Therefore, the temperature of this terminal depends on the refrigerant temperature within the compressor 2. In other words, the temperature of the terminal provided at the end of the lead wire 33 will not rise abnormally when energized, even if more current is passed through the motor in response to an increase in compression load. . Therefore, the terminal provided at the end of the lead wire 33 of the electric motor 12 may be a plate-shaped terminal similar to the terminal 93 provided at the end of the power line 25, or may be a terminal provided at the end of the lead wire 33 of the electric motor 12. It may also be a Faston terminal.

Therefore, according to the refrigeration cycle device 1 and the compressor 2 according to the present embodiment, it is possible to install the terminal blocks 22 and 23 and securely screw the sealed terminals 18 and 19 to the terminal 93 of the power line 25. The power line 25 can be connected to the sealed terminals 18 and 19 without applying excessive bending stress to the power line 25, and the power line 25 can be connected efficiently during manufacturing.

Although several embodiments of the invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents.

DESCRIPTION OF SYMBOLS 1... Refrigeration cycle device, 2... Compressor, 3... Heat radiator, 5... Expansion device, 6... Heat absorber, 7... Accumulator, 8... Refrigerant piping, 8a... Discharge pipe, 11... Airtight container, 11a... Body part , 11b, 11c... End plate, 12... Electric motor, 13... Compression mechanism, 15... Rotating shaft, 15a... Intermediate portion, 15b... Lower end portion, 16... Main bearing, 17... Sub bearing, 18... Sealed terminal (first sealed terminal ), 19... sealed terminal (second sealed terminal), 22... terminal block (first terminal block), 23... terminal block (second terminal block), 25... power line, 31... stator, 32... rotor, 33 ...Lead wire, 35...Rotor core, 36...Eccentric part, 41...Cylinder chamber, 42...Cylinder, 42A...First cylinder, 42B...Second cylinder, 42C...Third cylinder, 43...Roller, 45A...No. One partition plate, 45B... Second partition plate, 46... Fastening member, 51A... First discharge valve mechanism, 51B... Second discharge valve mechanism, 51C... Third discharge valve mechanism, 52... First discharge muffler, 53... Discharge Chamber, 55... Fastening member, 56... Second discharge muffler, 57... Second hole, 58... Frame, 59... Fastening member, 61... Suction pipe, 61A... First suction pipe, 61B... Second suction pipe, 61C... Third suction pipe, 62... Lubricating oil, 71... Main body, 72... Pin, 75... First plate terminal, 75f... Ventral surface, 75r... Back surface, 76, 76a, 76b, 76c... Second plate terminal, 76f ... Abdomen surface, 76r... Back surface, 81... Terminal placement hole, 82... Plate terminal receiving part, 83... Wiring holding part, 85... Horizontal bar part, 86... Vertical bar part, 91... Nut, 92... Fastening member, 93... Terminal, 95...long hole.

In order to solve the above-mentioned problems, a compressor according to an embodiment of the present invention includes: a closed container; a compression mechanism section that compresses a refrigerant accommodated in the closed container and introduced into the closed container; an electric motor having a cylindrical stator fixed to an inner surface of the stator, and a rotor disposed inside the stator to generate rotational driving force for the compression mechanism; Equipped with sealed terminals. Each of the sealed terminals has three plate-shaped terminals arranged outside the sealed container and electrically connected to the electric motor .

Further, the compressor includes a pair of terminal blocks provided at each of the sealed terminals. Each of the terminal blocks has a vertical bar portion and a horizontal bar portion, and the vertical bar portion extends in a direction perpendicular to one surface of any one of the three plate-shaped terminals, The horizontal bar portion is T-shaped and extends in a direction parallel to the one surface of the plate terminal .
Preferably, the pair of terminal blocks are arranged such that the vertical bar portions extend in directions away from each other.
One surface of each of the three plate-shaped terminals is arranged along each side of the triangle and along the other side so that a virtual plane including the one surface draws a triangle across the three plate-shaped terminals. It is preferable that the two plate-shaped terminals face one side, and the vertical bar portion of the terminal block extends in a direction perpendicular to one side of the triangle, while the horizontal bar portion faces one side of the one Preferably, it extends in a direction parallel to the sides.
Preferably, each of the plate-shaped terminals is bent to the outside of the triangle and extends from the one surface to the outside of the triangle. Here, the vertical bar portion includes a first plate-shaped terminal receiving portion that receives the plate-shaped terminal along the one side, and a first plate-shaped terminal receiving portion that extends in a direction perpendicular to the one side and that receives the plate-shaped terminal. It is preferable to have a first wiring holding part that guides a power line connected to the corresponding plate-shaped terminal in the part, and the horizontal bar part has a second plate-shaped terminal that receives the other two plate-shaped terminals. A power line extending in a direction perpendicular to the receiving part and the one side and connected to each corresponding plate-shaped terminal in the second plate-shaped terminal receiving part is guided by the first wiring holding part. It is preferable to have a second wiring holding part that guides the power line in parallel with the power line.

Preferably, each of the sealed terminals of the compressor according to the embodiment of the present invention has three second plate-shaped terminals arranged inside the sealed container and electrically connected to the electric motor. For each of the sealed terminals, the front and back surfaces of one of the second plate-shaped terminals are formed by any one of three imaginary lines that substantially divide a circle centered on the center of gravity of the triangle into thirds into a fan shape. Along the first imaginary line, the front and back surfaces of the other two second plate terminals are substantially perpendicular to the second imaginary line, which is the other two of the three imaginary lines, and It is preferable that the first imaginary line intersect between the pair of sealed terminals at a location farther from the center line of the sealed container when viewed from the pair of sealed terminals.
Each of the sealed terminals may have three second plate-shaped terminals arranged inside the sealed container and electrically connected to the electric motor, and in each of the sealed terminals, one of the second plate-shaped terminals is arranged inside the sealed container and electrically connected to the motor. The front and back surfaces of the two plate-shaped terminals are arranged perpendicularly to one side of the triangle, while the front and back surfaces of the other two second plate-shaped terminals are arranged perpendicularly to one side of the triangle. are preferably arranged parallel to each other. Here, it is preferable that an imaginary line extending from the center of gravity of the triangle in parallel to the front and back surfaces of the one second plate-shaped terminal points inward of the sealed terminal.

Further, the refrigeration cycle device according to the embodiment of the present invention connects the compressor, the radiator, the expansion device, and the heat absorber; refrigerant piping for circulating refrigerant.

Claims (3)

an airtight container;
a compression mechanism unit that is housed in the sealed container and compresses a refrigerant introduced into the sealed container;
an electric motor having a cylindrical stator fixed to the inner surface of the airtight container; and a rotor disposed inside the stator to generate a rotational driving force for the compression mechanism;
a pair of sealed terminals arranged side by side in the sealed container;
Each of the sealed terminals has three plate-shaped terminals arranged outside the sealed container and electrically connected to the electric motor,
One surface of each of the plate-shaped terminals is arranged along each side of the triangle, and along the other two sides, so that a virtual plane including the one surface draws a triangle across the three plate-shaped terminals. facing one side of the plate-shaped terminal,
Any one corner of the triangle drawn by the three plate terminals of one sealed terminal faces any one corner of the triangle drawn by the three plate terminals of the other sealed terminal. ,
comprising a pair of terminal blocks provided on each of the sealed terminals,
The terminal block is T-shaped having a vertical bar portion and a horizontal bar portion, and the horizontal bar portions of each of the pair of terminal blocks face each other, and the vertical bar portions move away from each other. arranged to extend,
The terminal block holds the three power wires so that the three power wires connected to the plate terminals of the corresponding sealed terminals are routed in a direction away from the other terminal block, compressor. Each of the sealed terminals has three second plate-shaped terminals arranged inside the sealed container and electrically connected to the electric motor,
For each of the sealed terminals, the front and back surfaces of one of the second plate-shaped terminals are formed by any one of three imaginary lines that substantially divide a circle centered on the center of gravity of the triangle into thirds into a fan shape. Along the first imaginary line, the front and back surfaces of the other two second plate-shaped terminals are substantially perpendicular to the second imaginary line, which is the other two of the three imaginary lines,
The compressor according to claim 1, wherein the first imaginary line intersects at a location farther than a center line of the sealed container when viewed from the pair of sealed terminals. A compressor according to claim 1 or 2,
radiator and
an expansion device;
a heat absorber;
A refrigeration cycle device comprising: the compressor, the heat radiator, the expansion device, and a refrigerant pipe that connects the heat absorber and allows the refrigerant to flow.

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