Compressor and refrigeration device

Abstract

The utility model relates to a compressor and a refrigerating device. A compressor is provided with: an electric motor (50) including a stator (51); a plurality of leads (54) extending from the motor (50); a wiring terminal (20) including a plurality of conductive parts (21) connected to the terminal parts (65) of the plurality of leads (54); and a terminal connector (60) to which a plurality of the terminal parts (65) are mounted. The plurality of lead wires (54) are fixed to a coil end (53a) of the stator (51), and the plurality of lead wires (54) are arranged side by side in an axial direction (M1) of a rotating shaft (M) of the motor (50) at a portion (54a) of the plurality of lead wires (54) fixed to the coil end (53a). According to the utility model, a plurality of leads can be easily connected.

Description

Technical Field

[0001] The utility model relates to a compressor and a refrigeration device. Background Art

[0002] Patent Document 1 discloses a motor for refrigeration equipment. The motor for refrigeration equipment described in Patent Document 1 includes a plurality of lead wires extending from a stator coil, and an external power source is connected to connection terminals of the plurality of lead wires.

[0003] Patent Document 1: Japanese Patent Application Laid-Open No. 04-331435

[0004] In a structure in which the connection terminals of multiple leads are mounted on a terminal connector and the connection terminals of the multiple leads are connected to an external power source at the same time via the terminal connector, it is necessary to twist the multiple connection terminals to change the orientation of the terminal connector when performing the connection operation of the multiple leads so that the connection surface of the terminal connector that is connected to the external power source is opposite to the connection portion of the external power source, which is very complicated. Utility Model Content

[0005] The purpose of the utility model is to provide a compressor and a refrigeration device that can easily perform connection operations of multiple lead wires.

[0006] The compressor of the first aspect includes an electric motor 50, a plurality of lead wires 54, a terminal 20, and a terminal connector 60, wherein the electric motor 50 includes a stator 51, the plurality of lead wires 54 extend from the electric motor 50, the terminal 20 includes a plurality of conductive portions 21 connected to terminal portions 65 of the plurality of lead wires 54, a plurality of the terminal portions 65 are installed in the terminal connector 60, the plurality of lead wires 54 are fixed to the coil end 53a of the stator 51, and the plurality of lead wires 54 are arranged in parallel and side by side in the axial direction M1 of the rotating shaft M of the electric motor 50 at a portion 54a fixed to the coil end 53a.

[0007] In the first aspect, the operation of connecting the terminal portions 65 of the plurality of lead wires 54 to the conductive portion 21 can be easily performed.

[0008] Secondly, based on the first aspect, the plurality of lead wires 54 are fixed to the coil end 53 a in such a manner that the connection surface 61 a of the terminal connector 60 connected to the conductive portion 21 faces a direction opposite to the terminal 20 .

[0009] In the second aspect, even without twisting the multiple leads 54, the multiple leads 54 can be connected to the conductive portion 21 with the connecting surface 61a of the terminal connector 60 facing the terminal 20, so the operation of connecting the terminal portion 65 of the multiple leads 54 to the conductive portion 21 can be easily performed.

[0010] A third aspect is that, based on the first or second aspect, portions of the plurality of lead wires 54 located between the connection terminal 20 and the portion 54 a fixed to the coil end 53 a are bent so as to approach the stator 51 .

[0011] In the third aspect, it is possible to prevent the lead wire 54 from coming into contact with the inner surface of the housing 10 and causing a short circuit.

[0012] A fourth aspect is that, based on any one of the first to third aspects, the winding method of the coil 53 in the stator 51 is distributed winding.

[0013] In the fourth aspect, the plurality of lead wires 54 can be fixed to the coil ends 53a of the distributed winding coil.

[0014] A refrigeration device according to a fifth aspect includes the compressor according to any one of the first to fourth aspects.

[0015] In the fifth aspect, the work of connecting the terminal portions 65 of the plurality of lead wires 54 to the conductive portion 21 can be easily performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a simplified structural diagram showing a refrigeration device;

[0017] Figure 2 is a diagram showing a compressor;

[0018] Figure 3 is a cross-sectional view showing a connection structure between a terminal pin and a lead;

[0019] Figure 4 is a diagram showing the positional relationship of a plurality of terminal pins when viewed from the inside of the housing;

[0020] Figure 5 It is a three-dimensional diagram of a terminal block connector;

[0021] Figure 6 is a perspective view showing a connecting action of connecting a terminal block connector to a terminal block;

[0022] Figure 7 This is a diagram of the leads, terminal connectors, and coil ends viewed along the axial direction of the motor;

[0023] Figure 8This is a perspective view showing the positional relationship among the lead wires, the terminal connector, and the coil end in a state where the lead wires are connected to the terminal pins of the terminal.

[0024] - Explanation of symbols -

[0025] 1 - compressor; 10 - housing; 20 - terminal block; 21 - terminal pin (conductive part); 50 - motor; 51 - stator; 54 - lead wire; 60 - terminal block connector (cluster block); 65 - connector clamp (terminal part); 53a - coil end; 54a - part; 100 - refrigeration unit; M - rotating shaft; M1 - axial direction. DETAILED DESCRIPTION

[0026] Below, embodiments of the present invention are described in detail with reference to the accompanying drawings. It should be noted that the present invention is not limited to the embodiments shown below, and various modifications are possible without departing from the technical spirit of the present invention. The drawings are provided to provide a general overview of the present invention, and therefore, dimensions, proportions, and quantities may be exaggerated or simplified as necessary to facilitate understanding.

[0027] (1) Refrigeration equipment

[0028] like Figure 1 As shown, the refrigeration device 100 according to the embodiment includes a compressor 1, a condenser 2, an expansion valve 3, and an evaporator 4. The compressor 1, condenser 2, expansion valve 3, and evaporator 4 are sequentially connected by a refrigerant pipe 5. This constitutes a closed refrigerant circuit 110.

[0029] Compressor 1 compresses the refrigerant drawn into it. The refrigerant compressed by compressor 1 dissipates heat to the air in condenser 2, condensing. The refrigerant condensed in condenser 2 is decompressed by expansion valve 3. The refrigerant decompressed by expansion valve 3 absorbs heat from the air in evaporator 4, evaporating. The refrigerant evaporated in evaporator 4 is drawn into compressor 1 and compressed again.

[0030] The first branch pipe 6, the second branch pipe 7 and the third branch pipe 8 are connected to the refrigerant circuit 110. The first branch pipe 6, the second branch pipe 7 and the third branch pipe 8 are used to supply or discharge the refrigerant to the compressor 1 for cooling the motor 19 (see Figure 2 ) of the refrigerant pipe.

[0031] The first branch pipe 6 connects the condenser 2 and the compressor 1. Specifically, the inlet end of the first branch pipe 6 is connected to the rear end of the condenser 2. The liquid refrigerant at the rear end of the condenser 2 flows into the compressor 1 through the first branch pipe 6.

[0032] The third branch pipe 8 connects the compressor 1 and the evaporator 4. Specifically, the inflow end of the third branch pipe 8 is connected to the compressor 1, and the outflow end of the third branch pipe 8 is connected to the evaporator 4. The refrigerant flowing out of the compressor 1 flows into the evaporator 4 through the third branch pipe 8.

[0033] (2) Compressor

[0034] The compressor 1 compresses the refrigerant. The compressor 1 is, for example, a scroll compressor. The compressor 1 sucks in low-pressure gaseous refrigerant and compresses the gaseous refrigerant. The compressor 1 discharges the compressed high-pressure gaseous refrigerant.

[0035] like Figure 2 As shown, the compressor 1 includes a terminal 20 , a compression mechanism 40 , a crankshaft 45 , an electric motor 50 , and a terminal connector 60 .

[0036] (2-1) Casing

[0037] like Figure 2 As shown, the casing 10 includes a substantially cylindrical casing body 12, an upper cover 11 covering the upper portion of the casing body 12, and a bottom cover 13 covering the lower portion of the casing body 12. The upper cover 11, the casing body 12, and the bottom cover 13 are welded together in this order to form an integral body. The casing 10 houses a compression mechanism 40, a crankshaft 45, and a terminal connector 60. Connected to the casing 10 are a suction pipe 14 for drawing in low-pressure gaseous refrigerant and a discharge pipe 15 for discharging high-pressure gaseous refrigerant.

[0038] (2-2) Compression mechanism

[0039] The compression mechanism (40) includes a fixed scroll (41), an orbiting scroll (42), a casing (43), and an Oldham ring (44) that prevents the orbiting scroll (42) from rotating. In the compression mechanism (40), a spiraling fixed wrap (projecting downward from the lower surface of the fixed scroll (41)) and a spiraling orbiting wrap (projecting upward from the upper surface of the orbiting scroll (42) are combined, with the lower surface of the fixed scroll (41) and the upper surface of the orbiting scroll (42) facing each other. As a result, a compression chamber (Sc) is formed between adjacent fixed and orbiting wraps.

[0040] (2-3) Electric motor

[0041] The electric motor 50 is composed of a ring-shaped stator 51 and a substantially cylindrical rotor 55 housed in the center of the stator 51 .

[0042] The stator 51 has a stator core 52 and a coil 53 wound on a plurality of teeth of the stator core 52. The winding method of the coil 53 in the stator 51 is distributed winding. Coil ends 53a are formed on both sides of the axial direction M1 of the stator core 52. The axial direction M1 is a direction parallel to the direction in which the rotation axis M of the motor 50 extends. In the present embodiment, the axial direction M1 is a vertical direction, that is, an up and down direction. A plurality of lead wires 54 extend from the coil end 53a. In the present embodiment, three lead wires 54 extend from the coil end 53a. The three lead wires 54 are connected to any one of the three phases (U phase, V phase, W phase) of the coil 53. Power is supplied to the coil 53 through the plurality of lead wires 54. As a result, the motor 50 (rotor 55) rotates around the axis of the rotation axis M.

[0043] (2-4) Crankshaft

[0044] like Figure 2 As shown, the crankshaft 45 is coupled to the rotor 55 of the motor 50 so that the crankshaft 45 rotates together with the motor 50. An eccentric portion 45a is formed on the upper portion of the crankshaft 45 so as to be eccentric with respect to the rotation axis M of the motor 50. The eccentric portion 45a is coupled to a hub portion provided at the lower portion of the orbiting scroll 42.

[0045] When the crankshaft (45) rotates with the electric motor (50), the orbiting scroll (42) orbits relative to the fixed scroll (41) rather than rotating on its own. As the orbiting scroll (42) orbits, the volume of the compression chamber (Sc) of the compression mechanism (40) changes periodically. When the volume of the compression chamber (Sc) increases, low-pressure gaseous refrigerant is supplied to the compression chamber (Sc) through the suction pipe (14). On the other hand, when the volume of the compression chamber (Sc) decreases, the gaseous refrigerant is compressed within the compression chamber (Sc) to become high-pressure gaseous refrigerant, which is ultimately discharged from the discharge pipe (15) to the exterior of the compressor (1).

[0046] (2-5) Terminal blocks

[0047] The connection terminal 20 is mounted on the housing 10. Power is supplied to the connection terminal 20 from an external power source existing outside the housing 10. Figures 2 to 4As shown, the terminal 20 has a terminal pin 21, a pin support body 22 and an insulating sealing portion 23. The pin support body 22 is composed of a cylindrical portion 22a and a circular cover portion 22b. The cylindrical portion 22a is fixed to the housing 10 in a manner that penetrates the housing 10 (housing trunk 12). The circular cover portion 22b closes the opening in the cylindrical portion 22a that is located outside the housing 10. A plurality of terminal pin insertion holes are provided on the circular cover portion 22b. Terminal pins 21 are respectively inserted into the plurality of terminal pin insertion holes. The terminal pins 21 protrude into the interior of the housing 10 through the terminal pin insertion holes. The terminal pins 21 are fixed to the pin support body 22 by the insulating sealing portion 23. The plurality of terminal pins 21 are insulated from each other by the insulating sealing portion 23. In this embodiment, three terminal pins 21 are provided, and the three terminal pins 21 are arranged to form a triangle when the centers of the three terminal pins 21 are connected (refer to Figure 4 ). The terminal pin 21 is an example of a conductive portion.

[0048] (2-6) Terminal block connector

[0049] like Figure 3 and Figure 5 As shown, the terminal connector 60 is a hollow component formed of resin. Multiple conductive connector clips 65 are mounted in the terminal connector 60. Each of the multiple connector clips 65 corresponds to a plurality of lead wires 54. Each of the multiple connector clips 65 forms a terminal portion for the corresponding lead wire 54. The terminal connector 60 secures the relative positions of the multiple connector clips 65. The terminal connector 60 includes multiple lead wire insertion holes 62. The multiple lead wire insertion holes 62 correspond to the multiple lead wires 54 and the multiple connector clips 65. The multiple lead wires 54 are inserted into the corresponding lead wire insertion holes 62 and connected to the corresponding connector clips 65 within the terminal connector 60. The connector clips 65 are formed with terminal pin insertion holes 65a for inserting the terminal pins 21. By inserting the terminal pins 21 into the terminal pin insertion holes 65a, the lead wires 54 are connected to the terminal pins 21. A lead 54 extending from the U-phase coil 53 is connected to the U-phase terminal pin 21, a lead 54 extending from the V-phase coil 53 is connected to the V-phase terminal pin 21, and a lead 54 extending from the W-phase coil 53 is connected to the W-phase terminal pin 21.

[0050] A plurality of internal spaces S are divided within the terminal connector 60. The plurality of internal spaces S are arranged in parallel. The plurality of internal spaces S are connected to the outside of the terminal connector 60 through the lead insertion holes 62, respectively. The plurality of internal spaces S correspond to the plurality of leads 54, respectively. In the plurality of internal spaces S, corresponding leads 54 are inserted through the lead insertion holes 62, respectively. The outer surface of the terminal connector 60 includes a connection surface 61a connected to the terminal pin 21. The connection surface 61a is a plane. A plurality of connection holes 64a are formed on the connection surface 61a. The plurality of connection holes 64a correspond to the plurality of terminal pins 21, respectively. Corresponding terminal pins 21 among the plurality of terminal pins 21 are inserted into the plurality of connection holes 64a, respectively. In this embodiment, three connection holes 64a are formed on the connection surface 61a, and the three connection holes 64a are arranged so as to form a triangle when the centers of the three connection holes 64a are connected.

[0051] The plurality of connection holes 64a correspond to the plurality of internal spaces S, respectively. The plurality of connection holes 64a connect the corresponding internal spaces S to the exterior of the terminal connector 60. The connector clip 65 is arranged in each of the plurality of internal spaces S so that the connection holes 64a face the terminal pin insertion holes 65a of the connector clip 65. In other words, the terminal pin insertion holes 65a of the connector clip 65 are arranged on the inner side of the connection holes 64a.

[0052] (3) Steps for connecting the leads to the terminal pins

[0053] like Figures 3 to 6 As shown, within the housing 10, with the connection surface 61a of the terminal connector 60 positioned opposite the terminal 20, the connection surface 61a of the terminal connector 60 is brought close to the terminal 20, and corresponding terminal pins 21 of the plurality of terminal pins 21 are inserted into the plurality of connection holes 64a formed on the connection surface 61a. Consequently, the plurality of terminal pins 21 are inserted into the interior of the terminal connector 60 through the corresponding connection holes 64a and then into the corresponding terminal pin insertion holes 65a of the connector clip 65. As a result, the plurality of terminal pins 21 are connected to corresponding leads 54 of the plurality of leads 54.

[0054] When power is supplied from an external power source to the connection terminal 20 while the connection terminal pin 21 is connected to the lead wire 54, power is supplied to the coil 53 via the connection terminal pin 21, the connector clip 65, and the lead wire 54. As a result, the motor 50 rotates.

[0055] (4) Characteristics

[0056] like Figure 7 and Figure 8As shown, multiple lead wires 54 are fixed to the outer periphery 53a1 of the coil end 53a. In this embodiment, the multiple lead wires 54 are fixed to the outer periphery of the coil end 53a by being wrapped around the coil end 53a via a belt-like member 70. At the portion 54a of the multiple lead wires 54 fixed to the coil end 53a, the multiple lead wires 54 are arranged in parallel and aligned in the axial direction M1 of the rotation axis M of the motor 50. Furthermore, at the portion 54a of the multiple lead wires 54 fixed to the coil end 53a, the multiple lead wires 54 extend in a circumferential direction M2 about the rotation axis M.

[0057] Thus, even without twisting the multiple leads 54, the terminal portion (connector clip 65) of the multiple leads 54 can be connected to the multiple terminal pins 21 by making the connection surface 61a of the terminal connector 60 opposite to the terminal 20. Therefore, the operation of connecting the multiple leads 54 to the multiple terminal pins 21 can be easily performed, thereby improving the operability of the connection operation of the multiple leads 54.

[0058] Furthermore, since the plurality of leads 54 are not twisted, it is possible to suppress the generation of restoring forces (forces that return twisted leads 54 to their untwisted state) on the plurality of leads 54 connected to the connector clamp 65. Consequently, it is possible to suppress an increase in the contact resistance between the connector clamp 65 and the terminal pins 21.

[0059] In addition, since the multiple leads 54 are connected to the multiple terminal pins 21 in a state where no restoring force resisting torsion is generated on the multiple leads 54, the multiple leads 54 can be stably connected to the multiple terminal pins 21, and it can be prevented that the multiple terminal pins 21 are not sufficiently inserted into the multiple connector clips 65.

[0060] like Figure 8 As shown, at the portion 54a fixed to the coil end 53a among the plurality of lead wires 54, the plurality of lead wires 54 are arranged in parallel and in parallel in the axial direction M1 of the rotating shaft M of the motor 50, thereby Figure 6 As shown, the plurality of lead wires 54 are secured to the coil end 53a with the connection surface 61a of the terminal connector 60, which is connected to the terminal pins 21, facing the direction opposite to the terminal 20. That is, when no external force is acting on the plurality of lead wires 54, the connection surface 61a of the terminal connector 60, which is connected to the terminal pins 21, faces the direction opposite to the terminal 20. When an external force is applied to the plurality of lead wires 54, the plurality of lead wires 54 are twisted, generating a restoring force that forces the plurality of lead wires 54 to return to their untwisted state. When no external force is applied to the plurality of lead wires 54, the plurality of lead wires 54 are not twisted, and no restoring force resisting the twisting is generated.

[0061] Thus, when the plurality of terminal pins 21 and the plurality of lead wires 54 are not connected and no external force is acting on the plurality of lead wires 54, the connection surface 61a of the terminal connector 60 faces the direction opposite the terminal 20. This eliminates the need for the complicated operation of twisting the plurality of lead wires 54 to orient the connection surface 61a of the terminal connector 60 toward the terminal 20 when connecting the plurality of lead wires 54 to the plurality of terminal pins 21. This allows the connection surface 61a of the terminal connector 60 to be easily brought close to the terminal 20. Consequently, the operation of connecting the plurality of lead wires 54 to the plurality of terminal pins 21 can be easily performed.

[0062] like Figure 7 As shown, the portion of the lead wires 54 located between the connection terminal 20 and the portion 54a fixed to the coil end 53a is bent so as to approach the stator 51. When viewed from the axial direction M1, the portion of the lead wires 54 located between the connection terminal 20 and the portion 54a fixed to the coil end 53a is bent within the range between the stator core 52 and the coil end 53a of the stator 51. This prevents the lead wires 54 from contacting the inner surface of the housing 10 and causing a short circuit.

[0063] like Figure 8 As shown, the lead wires 54 do not twist at the portion 54b between the terminal 20 and the portion 54a secured to the coil end 53a. Specifically, twisting of the lead wires 54 at this portion 54b does not cause the order in which the lead wires 54 are arranged in the axial direction M1 to change. Consequently, the order in which the lead wires 54 are arranged in the axial direction M1 remains unchanged at this portion 54b. In this embodiment, the lead wires 541, 542, and 543 are arranged in the same order in the axial direction M1: lead 541, lead 542, and lead 543.

[0064] While the embodiments and modifications are described above, it should be understood that various changes may be made to the embodiments and details without departing from the spirit and scope of the claims. Furthermore, elements of the embodiments, modifications, and other embodiments may be appropriately combined or replaced.

[0065] The terms "first", "second", "third", etc. mentioned above are only used to distinguish the sentences containing the above terms, and do not limit the number and order of the sentences.

[0066] Industrial Applicability

[0067] In summary, the present invention is useful for compressors and refrigeration devices.

Claims

1. A compressor, characterized in that: The compressor includes an electric motor (50), a plurality of leads (54), a terminal (20), and a terminal connector (60). The electric motor (50) comprises a stator (51), The plurality of leads (54) extend from the motor (50), The connection terminal (20) includes a plurality of conductive portions (21) connected to the terminal portions (65) of the plurality of lead wires (54). A plurality of terminal portions (65) are installed in the terminal connector (60). The plurality of lead wires (54) are fixed to the coil ends (53a) of the stator (51), At the portion (54a) of the plurality of lead wires (54) fixed to the coil end (53a), the plurality of lead wires (54) are arranged in parallel and aligned in the axial direction (M1) of the rotating shaft (M) of the motor (50).

2. The compressor according to claim 1, characterized in that: The plurality of lead wires (54) are fixed to the coil end (53a) in such a manner that a connection surface (61a) of the terminal connector (60) connected to the conductive portion (21) faces a direction opposite to the terminal (20).

3. The compressor according to claim 1 or 2, characterized in that: Portions of the plurality of lead wires (54) located between the connection terminal (20) and a portion (54a) fixed to the coil end (53a) are bent so as to approach the stator (51).

4. The compressor according to claim 1 or 2, characterized in that: The winding method of the coil (53) in the stator (51) is distributed winding.

5. A refrigeration device, characterized in that: The refrigeration device comprises the compressor according to claim 1 or 2.

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