Compressor and refrigerating device

Abstract

To make it possible to easily perform connection work for a plurality of lead wires.SOLUTION: A compressor comprises a motor (50) including a stator (51), a plurality of lead wires (54) extending from the motor (50), a terminal (20) including a plurality of conductive parts (21) connected to terminal parts (65) of the plurality of lead wires (54), and a cluster block (60) to which the plurality of terminal parts (65) are attached. The plurality of lead wires (54) are fixed to a coil end (53a) of the stator (51). In parts (54a) fixed to the coil end (53a) out of the plurality of lead wires (54), the plurality of lead wires (54) are arranged along an axial direction (M1) of a rotation axis (M) of the motor (50) while being arranged in parallel.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present disclosure relates to a compressor and a refrigeration device. [Background technology]

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

[0003] [Patent Document 1] Japanese Patent Application Publication No. 04-331435 Summary of the Invention [Problem to be solved by the invention]

[0004] If the connection terminals of multiple lead wires are attached to a cluster block and the cluster block is used to connect the connection terminals of multiple lead wires together to an external power supply, the work of connecting the multiple lead wires is complicated because the multiple connection terminals must be twisted and the orientation of the cluster block must be changed so that the connection surface of the cluster block that connects to the external power supply faces the connection point to the external power supply.

[0005] An object of the present disclosure is to provide a compressor and a refrigeration apparatus that can easily perform the work of connecting a plurality of lead wires. [Means for solving the problem]

[0006] The compressor of the first aspect includes a motor (50) including a stator (51), a plurality of lead wires (54) extending from the motor (50), a terminal (20) including a plurality of conductive portions (21) connected to terminal portions (65) of the plurality of lead wires (54), and a cluster block (60) to which the plurality of terminal portions (65) are attached, wherein the plurality of lead wires (54) are fixed to coil ends (53 a) of the stator (51), and at portions (54 a) of the plurality of lead wires (54) that are fixed to the coil ends (53 a), the plurality of lead wires (54) are arranged in parallel and aligned along the axial direction (M1) of the rotation shaft (M) of the motor (50).

[0007] In the first embodiment, the terminal portions 65 of the plurality of lead wires 54 can be easily connected to the conductive portion 21.

[0008] In the second aspect, in the first aspect, the plurality of lead wires (54) are fixed to the coil end (53a) so that the connection surface (61a) with the conductive portion (21) of the cluster block (60) faces in a direction opposite to the terminal (20).

[0009] In the second aspect, the plurality of lead wires (54) can be connected to the conductive portion (21) from a state in which the connection surface (61a) of the cluster block (60) faces the terminal (20) without twisting the plurality of lead wires (54), and therefore the work of connecting the terminal portions (65) of the plurality of lead wires (54) to the conductive portion (21) can be easily performed.

[0010] In the third aspect, in the first or second aspect, the portion of the plurality of lead wires (54) between the terminal (20) and the portion (54a) fixed to the coil end (53a) bends toward the stator (51).

[0011] In the third embodiment, it is possible to prevent the lead wires (54) from coming into contact with the inner surface of the casing (10) and causing a short circuit.

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

[0013] In the fourth embodiment, a 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 terminal portions (65) of the plurality of lead wires (54) can be easily connected to the conductive portion (21). [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a schematic diagram showing the configuration of a refrigeration device. [Figure 2] FIG. 2 is a diagram illustrating a compressor. [Figure 3] FIG. 3 is a cross-sectional view showing a connection structure between a terminal pin and a lead wire. [Figure 4] FIG. 4 is a diagram showing the positional relationship of a plurality of terminal pins when viewed from inside the casing. [Figure 5] FIG. 5 is a perspective view of the cluster block. [Figure 6] FIG. 6 is a perspective view showing the operation of connecting the cluster block to the terminal. [Figure 7] FIG. 7 is a view of the lead wires, cluster block, and coil ends as viewed along the axial direction of the motor. [Figure 8] FIG. 8 is a perspective view showing the positional relationship between the lead wires, the cluster block, and the coil end in a state where the lead wires are connected to the terminal pins of the terminal. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the embodiments shown below, and various modifications are possible within the scope of the technical concept of the present disclosure. Since the drawings are intended to conceptually explain the present disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary to facilitate understanding.

[0018] (1) Refrigeration equipment As shown in Fig. 1, a refrigeration system (100) according to this embodiment includes a compressor (1), a condenser (2), an expansion valve (3), and an evaporator (4). The compressor (1), the condenser (2), the expansion valve (3), and the evaporator (4) are connected in this order by a refrigerant pipe (5). This forms a refrigerant circuit (110), which is a closed circuit.

[0019] The compressor (1) compresses the refrigerant drawn into the compressor (1). The refrigerant compressed by the compressor (1) is condensed in the condenser (2) by dissipating heat to the air. The refrigerant condensed in the condenser (2) is reduced in pressure by the expansion valve (3). The refrigerant reduced in pressure by the expansion valve (3) absorbs heat from the air and evaporates in the evaporator (4). The refrigerant evaporated in the evaporator (4) is drawn into the compressor (1) and compressed again.

[0020] The refrigerant circuit (110) is connected to a first branch pipe (6), a second branch pipe (7), and a third branch pipe (8). The first branch pipe (6), the second branch pipe (7), and the third branch pipe (8) are pipes for supplying or discharging a refrigerant for cooling a motor (19) (see FIG. 2 ), which will be described later, to or from the compressor (1).

[0021] 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 downstream side of the condenser (2). The liquid refrigerant at the downstream side of the condenser (2) flows into the compressor (1) via the first branch pipe (6).

[0022] The third branch pipe (8) connects the compressor (1) and the evaporator (4). Specifically, the inlet end of the third branch pipe (8) is connected to the compressor (1), and the outlet 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) via the third branch pipe (8).

[0023] (2) Compressor The compressor (1) compresses a refrigerant. The compressor (1) is, for example, a scroll compressor. The compressor (1) sucks in a low-pressure gas refrigerant and compresses it. The compressor (1) discharges the compressed high-pressure gas refrigerant.

[0024] As shown in FIG. 2, the compressor (1) includes a terminal (20), a compression mechanism (40), a crankshaft (45), a motor (50), and a cluster block (60).

[0025] (2-1) Casing As shown in Fig. 2, the casing (10) has a substantially cylindrical body casing (12), a top lid (11) covering an upper portion of the body casing (12), and a bottom lid (13) covering a lower portion of the body casing 12. The top lid (11), the body casing (12), and the bottom lid (13) are welded together in this order to form an integrated unit. The casing (10) accommodates a compression mechanism (40), a crankshaft (45), and a cluster block (60). An intake pipe (14) for drawing in low-pressure gas refrigerant and a discharge pipe (15) for discharging high-pressure gas refrigerant are connected to the casing (10).

[0026] (2-2) Compression mechanism The compression mechanism (40) includes a fixed scroll (41), a movable scroll (42), a housing (43), and an Oldham ring (44) that prevents the movable scroll (42) from rotating about its axis. In the compression mechanism (40), a spiral-shaped fixed wrap projecting downward from the lower surface of the fixed scroll (41) is combined with a spiral-shaped movable wrap projecting upward from the upper surface of the movable scroll (42) with the lower surface of the fixed scroll (41) facing the upper surface of the movable scroll (42). As a result, a compression chamber (Sc) is formed between the adjacent fixed wrap and movable wrap.

[0027] (2-3) Motor The motor (50) is composed of a ring-shaped stator (51) and a substantially cylindrical rotor (55) accommodated in the center of the stator (51).

[0028] The stator (51) has a stator core (52) and coils (53) wound around multiple teeth of the stator core (52). The coils (53) of the stator (51) are wound using a distributed winding method. Coil ends (53a) are formed on both sides of the stator core (52) in the axial direction (M1). The axial direction (M1) is parallel to the direction in which the rotation shaft (M) of the motor (50) extends. In this embodiment, the axial direction (M1) is the vertical direction. A plurality of lead wires (54) extend from the coil end (53a). In this embodiment, three lead wires (54) extend from the coil end (53a). The three lead wires (54) are connected to 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 rotation shaft (M).

[0029] (2-4) Crankshaft 2, the crankshaft (45) is connected to the rotor (55) of the motor (50) and rotates together with the motor (50). An eccentric portion (45a) that is eccentric with respect to the rotation axis (M) of the motor (50) is formed on the upper portion of the crankshaft (45), and the eccentric portion (45a) is connected to a boss portion provided on the lower portion of the movable scroll (42).

[0030] When the crankshaft (45) rotates together with the motor (50), the movable scroll (42) revolves relative to the fixed scroll (41) without rotating on its axis. As the movable scroll (42) revolves, 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 gas 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 gas refrigerant is compressed in the compression chamber (Sc) to become high-pressure gas refrigerant, and is finally discharged from the discharge pipe (15) to the outside of the compressor (1).

[0031] (2-5) Terminal The terminal (20) is attached to the casing (10). Electric power is supplied to the terminal (20) from an external power source located outside the casing (10). As shown in FIGS. 2 to 4, the terminal (20) includes a terminal pin (21), a pin support (22), and an insulating seal portion (23). The pin support (22) is composed of a cylindrical portion (22a) and a circular lid portion (22b). The cylindrical portion (22a) is fixed to the casing (10) (body casing (12)) so as to penetrate the casing (10). The circular lid portion (22b) closes an opening in the cylindrical portion (22a) located outside the casing (10). The circular lid portion (22b) is provided with a plurality of terminal pin insertion holes. A terminal pin (21) is inserted into each of the plurality of terminal pin insertion holes. The terminal pins 21 protrude into the casing 10 through the terminal pin insertion holes. The terminal pins 21 are fixed to the pin support 22 by insulating seal portions 23. The terminal pins 21 are insulated from one another by the insulating seal portions 23. In this embodiment, three terminal pins 21 are provided, and the three terminal pins 21 are arranged so that connecting the centers of the three terminal pins 21 forms a triangle (see FIG. 4). The terminal pins 21 are an example of a conductive portion.

[0032] (2-6) Cluster Block As shown in FIGS. 3 and 5, the cluster block 60 is a hollow member made of resin. A plurality of conductive connector clips 65 are attached to the cluster block 60. The plurality of connector clips 65 correspond to the plurality of lead wires 54, respectively. Each of the plurality of connector clips 65 constitutes a terminal portion of the corresponding lead wire 54. The cluster block 60 fixes the relative positions of the plurality of connector clips 65. The cluster block 60 includes a plurality of lead wire insertion holes 62. The plurality of lead wire insertion holes 62 correspond to the plurality of lead wires 54, and the plurality of connector clips 65. Each of the plurality of lead wires 54 is inserted into the corresponding lead wire insertion hole 62 and connected to the corresponding connector clip 65 within the cluster block 60. The connector clip 65 is formed with a terminal pin insertion hole 65a for inserting a terminal pin 21. The terminal pins (21) are inserted into the terminal pin insertion holes (65a) to connect the lead wires (54) to the terminal pins (21). The lead wires (54) extending from the U-phase coil (53) are connected to the U-phase terminal pin (21), the lead wires (54) extending from the V-phase coil (53) are connected to the V-phase terminal pin (21), and the lead wires (54) extending from the W-phase coil (53) are connected to the W-phase terminal pin (21).

[0033] The cluster block 60 is divided into a plurality of internal spaces S. The plurality of internal spaces S are arranged in parallel. Each of the plurality of internal spaces S communicates with the outside of the cluster block 60 through a lead wire insertion hole 62. The plurality of internal spaces S correspond to the plurality of lead wires 54, respectively. A corresponding lead wire 54 is inserted into each of the plurality of internal spaces S through the lead wire insertion hole 62. The outer surface of the cluster block 60 includes a connection surface 61a for connection with the terminal pins 21. The connection surface 61a is flat. A plurality of connection holes 64a are formed in the connection surface 61a. The plurality of connection holes 64a correspond to the plurality of terminal pins 21, respectively. A corresponding terminal pin 21 from the plurality of terminal pins 21 is inserted into each of the plurality of connection holes 64a. In this embodiment, three connection holes (64a) are formed in the connection surface (61a), and the three connection holes (64a) are arranged so that the centers of the three connection holes (64a) join to form a triangle.

[0034] The plurality of connection holes (64a) correspond to the plurality of internal spaces (S), respectively. Each of the plurality of connection holes (64a) communicates the corresponding internal space (S) with the outside of the cluster block (60). In each of the plurality of internal spaces (S), a connector clip (65) is disposed so that the connection hole (64a) faces the terminal pin insertion hole (65a) of the connector clip (65). In other words, the terminal pin insertion hole (65a) of the connector clip (65) is disposed at the rear side of the connection hole (64a).

[0035] (3) Procedure for connecting lead wires to terminal pins 3 to 6, the cluster block 60 is placed inside the casing 10 so that the connection surface 61a of the cluster block 60 faces the terminal 20. Then, the connection surface 61a of the cluster block 60 is brought close to the terminal 20, and a corresponding one of the plurality of terminal pins 21 is inserted into each of the plurality of connection holes 64a formed in the connection surface 61a. Thus, each of the plurality of terminal pins 21 is inserted into the cluster block 60 through the corresponding connection hole 64a and into the terminal pin insertion hole 65a of the corresponding connector clip 65. As a result, each of the plurality of terminal pins 21 is connected to a corresponding one of the plurality of lead wires 54.

[0036] When power is supplied to the terminal 20 from an external power source while the terminal pin 21 is connected to the lead wire 54, power is supplied to the coil 53 through the terminal pin 21, connector clip 65, and lead wire 54. As a result, the motor 50 rotates.

[0037] (4) Features As shown in Figures 7 and 8, the lead wires (54) are fixed to the outer periphery (53a1) of the coil end (53a). In this embodiment, the lead wires (54) are fixed to the outer periphery (53a) of the coil end (53a) by wrapping a string-like member (70) around the coil end (53a). At the portions (54a) of the lead wires (54) fixed to the coil end (53a), the lead wires (54) are arranged in parallel and aligned along the axial direction (M1) of the rotation shaft (M) of the motor (50). At the portions (54a) of the lead wires (54) fixed to the coil end (53a), each of the lead wires (54) extends in the axial direction (M2) of the rotation shaft (M).

[0038] This allows the connection surface (61a) of the cluster block (60) to face the terminal (20) and connect the terminal portions (connector clips (65)) of the multiple lead wires (54) to the multiple lead wires (54) without twisting the multiple lead wires (54). This makes it easy to connect the multiple lead wires (54) to the multiple terminal pins (21), improving the workability of the connection work of the multiple lead wires (54).

[0039] Furthermore, by preventing the lead wires 54 from being twisted, it is possible to suppress the occurrence of a restoring force (a force that causes the twisted lead wires 54 to return to an untwisted state) in the lead wires 54 connected to the connector clip 65. As a result, it is possible to suppress an increase in contact resistance between the connector clip 65 and the terminal pin 21.

[0040] Furthermore, since the plurality of lead wires (54) are connected to the plurality of terminal pins (21) when no restoring force against twisting is generated in the plurality of lead wires (54), the plurality of lead wires (54) can be stably connected to the plurality of terminal pins (21), and the plurality of terminal pins (21) can be prevented from being insufficiently inserted into the plurality of connector clips (65).

[0041] As shown in Fig. 8, at the portions (54a) of the plurality of lead wires (54) fixed to the coil ends (53a), the plurality of lead wires (54) are arranged in parallel and aligned along the axial direction (M1) of the rotation shaft (M) of the motor (50). As a result, as shown in Fig. 6, the plurality of lead wires (54) are fixed to the coil ends (53a) so that the connection surfaces (61a) with the terminal pins (21) of the cluster block (60) face the direction facing the terminals (20). In other words, when no external force is acting on the plurality of lead wires (54), the connection surfaces (61a) with the terminal pins (21) of the cluster block (60) face the direction facing the terminals (20). When an external force is acting on the plurality of lead wires (54), the plurality of lead wires (54) are twisted, and a restoring force that returns the plurality of lead wires (54) to their untwisted state is generated in the plurality of lead wires (54). A state in which no external force is acting on the multiple lead wires (54) is a state in which the multiple lead wires (54) are not twisted and no restoring force against twisting is generated in the multiple lead wires (54).

[0042] As a result, when the terminal pins 21 and the lead wires 54 are not connected and no external force is acting on the lead wires 54, the connection surface 61 a of the cluster block 60 faces the terminal 20. This eliminates the need for a complicated procedure of twisting the lead wires 54 to bring the connection surface 61 a of the cluster block 60 into contact with the terminal 20 when connecting the lead wires 54 to the terminal pins 21, and allows the connection surface 61 a of the cluster block 60 to be easily brought close to the terminal 20. As a result, the operation of connecting the lead wires 54 to the terminal pins 21 can be easily performed.

[0043] 7, the portions of the lead wires (54) between the terminals (20) and the portions (54a) fixed to the coil ends (53a) bend toward the stator (51). As viewed in the axial direction (M1), the portions of the lead wires (54) between the terminals (20) and the portions (54a) fixed to the coil ends (53a) bend in the range between the stator core (52) of the stator (51) and the coil ends (53a). This prevents the lead wires (54) from coming into contact with the inner surface of the casing (10) and causing a short circuit.

[0044] As shown in FIG. 8 , the lead wires (54) are not twisted in a portion (54b) between the terminal (20) and the portion (54a) where the lead wires (54) are fixed to the coil end (53a). That is, in the portion (54b) of the lead wires (54), the order of the lead wires (54) in the axial direction (M1) is not changed due to the twisting of the lead wires (54). As a result, in the portion (54b) of the lead wires (54), the order of the lead wires (54) in the axial direction (M1) is constant. In this embodiment, in the portion (54b) of the lead wires (541, 542, 543, the lead wires (541, 542, 543) are arranged in the constant order of the lead wire (541), the lead wire (542), and the lead wire (543) in the axial direction (M1).

[0045] Although the embodiments and modifications have been described above, it will be understood that various modifications in form and details are possible without departing from the spirit and scope of the claims. Furthermore, elements of the above embodiments, modifications, and other embodiments may be combined or substituted as appropriate.

[0046] The terms "first," "second," "third," etc. mentioned above are used to distinguish the terms to which these terms are attached, and do not limit the number or order of the terms. [Industrial Applicability]

[0047] As described above, the present disclosure is useful for compressors and refrigeration devices. [Explanation of symbols]

[0048] 1 Compressor 10 Casing Terminal 20 21 Terminal pin (conductive part) 50 motor 51 Stator 54 Lead wire 60 cluster blocks 65 Connector clip (terminal part) 53a coil end 54a place 100 Refrigeration equipment M rotation axis M1 Axial direction

Claims

1. a motor (50) including a stator (51); a plurality of lead wires (54) extending from the motor (50); a terminal (20) including a plurality of conductive portions (21) connected to the terminal portions (65) of the plurality of lead wires (54); a cluster block (60) to which a plurality of the terminal portions (65) are attached; Equipped with The plurality of lead wires (54) are fixed to the coil ends (53a) of the stator (51), A compressor, wherein at portions (54a) of the plurality of lead wires (54) that are fixed to the coil ends (53a), the plurality of lead wires (54) are arranged in parallel and aligned along an axial direction (M1) of a rotating shaft (M) of the motor (50).

2. 2. The compressor according to claim 1, wherein the plurality of lead wires are fixed to the coil ends so that connection surfaces of the cluster block with the conductive portions face in a direction opposite to the terminals.

3. 3. The compressor according to claim 1, wherein a portion of the plurality of lead wires (54) between the terminal (20) and a portion (54a) fixed to the coil end (53a) bends toward the stator (51).

4. 3. The compressor according to claim 1, wherein the winding method of the coils (53) in the stator (51) is distributed winding.

5. A refrigeration device comprising the compressor according to claim 1 or 2.

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