Compressor and refrigeration device

Abstract

A compressor includes a compression mechanism, a casing that houses the compression mechanism, a terminal body that is fixed to an outer wall of the casing and holds a terminal rod to which a wire to a device in the casing is connected, and a terminal box that is fixed to the outer wall of the casing and houses the terminal rod held by the terminal body. The terminal body protrudes in a direction away from the casing. The terminal box includes a bottom wall fixed to the outer wall of the casing, a hole formed in the bottom wall and through which the terminal body passes, and a tubular portion extending from a peripheral edge of the hole in the direction away from the casing. The terminal body is inserted into the tubular portion.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a compressor and a refrigeration apparatus.BACKGROUND ART

[0002] Patent Document 1 discloses a compressor including a terminal box provided on a peripheral wall of a casing to protect a terminal.CITATION LISTPATENT DOCUMENT

[0003] Patent Document 1: Japanese Utility Model Publication No. S61-032761SUMMARY OF THE INVENTIONTECHNICAL PROBLEM

[0004] This type of compressor includes a compression mechanism, a casing, a terminal rod, a terminal body, and a terminal box. The casing houses the compression mechanism. A wire to the device in the casing is connected to the terminal rod. The terminal body holds the terminal rod and is fixed to the outer wall of the casing. The terminal box is fixed to the outer wall of the casing and houses the terminal rod held by the terminal body.

[0005] If an abnormality occurs during the operation of the compressor, there is a risk of generating a flame inside the terminal box housing the terminal rod. The flame grows in the presence of oxygen. The atmosphere outside the terminal box contains a large amount of oxygen, and it is necessary to prevent the flame generated inside the terminal box from exiting to the outside of the terminal box.

[0006] An object of the present disclosure is to prevent, in a compressor, a flame generated inside a terminal box from exiting to the outside of the terminal box.SOLUTION TO THE PROBLEM

[0007] A first aspect of the present disclosure is directed to a compressor (10). The compressor (10) includes: a compression mechanism (30); a casing (20) configured to house the compression mechanism (30); a terminal body (110) fixed to an outer wall (28) of the casing (20) and configured to hold a terminal rod (100) to which a wire (K) to a device (J) in the casing (20) is connected; and a terminal box (120) fixed to the outer wall (28) of the casing (20) and configured to house the terminal rod (100) held by the terminal body (110). The terminal body (110) protrudes in a direction (E) away from the casing (20), the terminal box (120) includes a bottom wall (121) fixed to the outer wall (28) of the casing (20), a hole (122) formed in the bottom wall (121) and through which the terminal body (110) passes, and a tubular portion (126) extending from a peripheral edge (122a) of the hole (122) in the direction (E) away from the casing (20), and the terminal body (110) is inserted into the tubular portion (126).

[0008] According to the compressor (10) of the first aspect, the flame generated inside the terminal box (120) passes through a clearance between the terminal body (110) and the tubular portion (126) of the terminal box (120) to exit the terminal box (120). The flame may be extinguished while passing through the clearance.

[0009] According to the compressor (10) of the first aspect, the flame generated inside the terminal box (120) can be prevented from exiting to the outside of the terminal box (120).

[0010] A second aspect of the present disclosure is directed to the compressor (10) of the first aspect. In the compressor (10), an insertion length (L1) of the terminal body (110) inserted into the tubular portion (126) is equal to or greater than 6 mm.

[0011] The compressor (10) of the second aspect is more advantageous in extinguishing the flame while the flame is passing through the clearance between the terminal body (110) and the tubular portion (126) of the terminal box (120).

[0012] A third aspect of the present disclosure is directed to the compressor (10) of the first or second aspect. In the compressor (10), a clearance (T) between the terminal body (110) and the tubular portion (126) is equal to or less than 0.4 mm.

[0013] The compressor (10) of the third aspect is more advantageous in extinguishing the flame while the flame is passing through the clearance (T) between the terminal body (110) and the tubular portion (126) of the terminal box (120).

[0014] A fourth aspect of the present disclosure is directed to the compressor (10) of any one of the first to third aspects. In the compressor (10), the tubular portion (126) has a cylindrical shape extending straight, and the terminal body (110) extends straight and has a circular cross section.

[0015] According to the compressor (10) of the fourth aspect, the terminal body (110) can be easily inserted into the tubular portion (126) of the terminal box (120).

[0016] A fifth aspect of the present disclosure is directed to the compressor (10) of any one of the first to fourth aspects. The compressor (10) includes an electric motor (70) configured to drive the compression mechanism (30), the casing (20) is configured to house the compression mechanism (30) and the electric motor (70), and a wire (K) to the electric motor (70) is connected to the terminal rod (100).

[0017] In the compressor (10) of the fifth aspect, a large current is likely to flow through the terminal rod (100) connected to the electric motor (70) via the wire (K), and thus, it is beneficial to take measures against a flame that may be generated around the terminal rod (100) through which a large current is likely to flow.

[0018] A sixth aspect of the present disclosure is directed to the compressor (10) of any one of the first to fifth aspects. In the compressor (10), the outer wall (28) has an arc shape.

[0019] In the compressor (10) of the present embodiment, a gap is likely to be formed between the outer wall (28) of the casing (20) and the bottom wall (121) of the terminal box (120). This can enhance the advantage of inserting the terminal body (110) into the tubular portion (126) of the terminal box (120).

[0020] A seventh aspect of the present disclosure is directed to a refrigeration apparatus (1). The refrigeration apparatus (1) includes the compressor (10) of any one of the first to sixth aspects.BRIEF DESCRIPTION OF THE DRAWINGS

[0021] [FIG. 1] FIG. 1 illustrates a refrigeration apparatus (1) of a first embodiment. [FIG. 2] FIG. 2 is a front sectional view of a compressor (10) of the first embodiment. [FIG. 3] FIG. 3 is a front sectional view of an outer wall (28) of a casing (20), a terminal rod (100), a terminal body (110), and a terminal box (120) of the first embodiment. [FIG. 4] FIG. 4 is a perspective view of the terminal rod (100) and the terminal body (110) of the first embodiment. [FIG. 5] FIG. 5 is a plan view of the outer wall (28) of the casing (20) and the terminal box (120) of the first embodiment. [FIG. 6] FIG. 6 is a side view of the terminal rod (100), the terminal body (110), and the terminal box (120) of the first embodiment. [FIG. 7] FIG. 7 is a view corresponding to FIG. 3, according to a second embodiment. [FIG. 8] FIG. 8 is a view corresponding to FIG. 3, according to a third embodiment. [FIG. 9] FIG. 9 is a view corresponding to FIG. 3, according to prior art. DESCRIPTION OF EMBODIMENTS

[0022] Embodiments of the present disclosure will be described in detail below with reference to the drawings. The present disclosure is not limited to the embodiments shown below, and various changes can be made within the scope without departing from the technical concept of the present disclosure. Since each of the drawings is intended to illustrate the present disclosure conceptually, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for ease of understanding.<First Embodiment>(Refrigeration Apparatus)

[0023] A compressor (10) of a first embodiment will be described below. The compressor (10) is applied to a refrigeration apparatus (1). FIG. 1 illustrates the refrigeration apparatus (1). The refrigeration apparatus (1) includes a refrigerant circuit (1a) in which a refrigerant as a working fluid circulates. The refrigerant circuit (1a) of the refrigeration apparatus (1) includes a compressor (10), a condenser (a radiator) (2), a decompression mechanism (an expansion mechanism) (3), and an evaporator (4). The decompression mechanism (3) is, for example, an expansion valve or a capillary tube. The refrigerant circuit (1a) performs a vapor compression refrigeration cycle. The refrigeration apparatus (1) is applied to, for example, an air conditioner and a cooler.(Compressor)

[0024] FIG. 2 shows the compressor (10) in a front sectional view. In this example, the compressor (10) is a scroll compressor. The compressor (10) includes a casing (20), a compression mechanism (30), a drive shaft (40), a housing (50), a balance weight (60), an electric motor (70), a lower bearing member (80), an oil pump (90), a terminal rod (100), a terminal body (110), and a terminal box (120).

[0025] Hereinafter, the direction in which the axis of the drive shaft (40) extends is referred to as an axial direction and denoted by (Z). A direction orthogonal to the axis of the drive shaft (40) is referred to as a radial direction and denoted by (R). A side farther from the axis of the drive shaft (40) in the radial direction is referred to as radially outside or outward and denoted by (Ro). A side closer to the axis of the drive shaft (40) in the radial direction is referred to as radially inside or inward and denoted by (Ri). The direction of rotation of the drive shaft (40) is referred to as a circumferential direction and denoted by (θ).

[0026] The axial direction of the drive shaft (40) extends in an upper-lower direction. The upper-lower direction is denoted by (Z), as is the axial direction. An upper side in the axial direction (the upper-lower direction) is simply referred to as the upper side and is denoted by (Za). A lower side in the axial direction (the upper-lower direction) is simply referred to as the lower side and is denoted by (Zb).

[0027] The compressor (10) is disposed upright. Inside the casing (20), the compression mechanism (30), the housing (50), the balance weight (60), the electric motor (70), the lower bearing member (80), and the oil pump (90) are disposed in this order from top to bottom. The drive shaft (40) extends in the axial direction (the upper-lower direction) in the casing (20).

[0028] As will be described in detail later, the terminal body (110) and the terminal box (120) are fixed to an outer wall (28) of the casing (20). The terminal rod (100) is held by the terminal body (110).(Casing)

[0029] The casing (20) houses the compression mechanism (30), the drive shaft (40), the housing (50), the balance weight (60), the electric motor (70), the lower bearing member (80), and the oil pump (90).

[0030] The casing (20) is a cylindrical sealed container that is elongated in the axial direction (the upper-lower direction). The casing (20) is made of metal. The casing (20) includes a barrel (21), an upper end plate (22), a lower end plate (23), and a leg (24). The barrel (21) has a cylindrical shape with both ends in the axial direction (the upper-lower direction) open. The upper end plate (22) closes an upper end of the barrel (21). The lower end plate (23) closes a lower end of the barrel (21). The leg (24) is provided at the bottom of the lower end plate (23) to support the casing (20) on the base.

[0031] A suction pipe (25) is connected to the casing (20). The suction pipe (25) penetrates the upper end plate (22) of the casing (20) in the axial direction. A discharge pipe (26) is connected to the casing (20). The discharge pipe (26) radially penetrates the barrel (21) of the casing (20).

[0032] A lower bottom portion of the casing (20) forms an oil reservoir (27). The oil reservoir (27) stores a lubricant (L). The lubricant (L) is provided to lubricate sliding portions of the compressor (10).

[0033] The outer wall (28) of the casing (20) will be described later.(Compression Mechanism)

[0034] The compression mechanism (30) is provided in the casing (20). The compression mechanism (30) compresses a refrigerant (G) (e.g., refrigerant gas) as a working fluid. In this example, the refrigerant (G) is propane. Propane is highly flammable and ignites easily. The compression mechanism (30) includes a fixed scroll (31) and a movable scroll (35). The movable scroll (35) meshes with the fixed scroll (31).

[0035] The fixed scroll (31) includes a fixed end plate (32), a fixed wrap (33), and an outer peripheral wall (34). The fixed end plate (32) has a disc shape. The fixed wrap (33) is in the shape of a spiral wall that draws an involute curve, and protrudes downward from a lower surface of the fixed end plate (32). The outer peripheral wall (34) surrounds the outer periphery of the fixed wrap (33), and protrudes downward from the lower surface of the fixed end plate (32).

[0036] The movable scroll (35) is also called an orbiting scroll. The movable scroll (35) is disposed below the fixed scroll (31). The movable scroll (35) includes a movable end plate (36), a movable wrap (37), and a boss (38). The movable end plate (36) has a disc shape. The movable wrap (37) is in the shape of a spiral wall that draws an involute curve, and protrudes upward from an upper surface of the movable end plate (36). The boss (38) has a cylindrical shape and protrudes downward from the center of a lower surface of the movable end plate (36). A bearing (38a) is fitted to the inner periphery of the boss (38).

[0037] In the compression mechanism (30), the movable wrap (37) of the movable scroll (35) meshes with the fixed wrap (33) of the fixed scroll (31). A compression chamber (C) is formed in a region surrounded by the fixed end plate (32) and fixed wrap (33) of the fixed scroll (31) and the movable end plate (36) and movable wrap (37) of the movable scroll (35). The refrigerant (G) is compressed in the compression chamber (C). The compression chamber (C) communicates with the suction pipe (25).

[0038] A discharge port (32a) is formed in the fixed end plate (32) of the fixed scroll (31). The discharge port (32a) axially penetrates a central portion of the fixed end plate (32) to communicate with the compression chamber (C). A discharge chamber (A) is formed in a region between the fixed scroll (31) and the upper end plate (22) of the casing (20). The discharge chamber (A) communicates with the discharge port (32a).(Drive Shaft)

[0039] The drive shaft (40) extends in the axial direction (the upper-lower direction) in the casing (20). The drive shaft (40) has a main shaft portion (41) and an eccentric shaft portion (42). The eccentric shaft portion (42) is provided at an upper end of the main shaft portion (41). The outer diameter of the eccentric shaft portion (42) is less than the outer diameter of the main shaft portion (41). An axis (42a) of the eccentric shaft portion (42) is decentered from an axis (41a) of the main shaft portion (41) by a predetermined distance.

[0040] The eccentric shaft portion (42) of the drive shaft (40) is rotatably supported by the boss (38) of the movable scroll (35) via the bearing (38a).(Housing)

[0041] The housing (50) has a substantially cylindrical shape extending in the axial direction (the upper-lower direction). The housing (50) is provided below the movable scroll (35) and above the balance weight (60) in the casing (20). The drive shaft (40) is inserted to the inner periphery of the housing (50). The outer diameter of the upper portion of the housing (50) is larger than the outer diameter of the lower portion of the housing (50). An outer peripheral surface of the upper portion of the housing (50) is fixed to an inner peripheral surface of the barrel (21) of the casing (20).

[0042] The inner diameter of the upper portion of the housing (50) is larger than the inner diameter of the lower portion of the housing (50). A crank chamber (51) is formed radially inside the upper portion of the housing (50) by a downward recess. The crank chamber (51) houses the boss (38) of the movable scroll (35).

[0043] A main bearing hole (52) is formed radially inside the lower portion of the housing (50). The main bearing hole (52) penetrates the lower portion of the housing (50) in the axial direction (the upper-lower direction), and communicates with the crank chamber (51). A bearing (52a) is fitted to the inner periphery of the main bearing hole (52). The main shaft portion (41) of the drive shaft (40) is rotatably supported in the main bearing hole (52) of the housing (50) via the bearing (52a).

[0044] A discharge space (B) is formed in the casing (20) below the housing (50). The discharge space (B) communicates with the discharge pipe (26).(Balance Weight)

[0045] The balance weight (60) is provided to cancel out an unbalanced force generated by the orbiting motion of the movable scroll (35) of the compression mechanism (30). The balance weight (60) is provided below the housing (50) and above the electric motor (70) in the casing (20). The balance weight (60) is provided on the main shaft portion (41) of the drive shaft (40). The balance weight (60) rotates integrally with the drive shaft (40). The balance weight (60) includes a weight portion (61), a non-weight portion (62), and a cover (63).

[0046] The weight portion (61) is a portion extending in the circumferential direction over substantially half of the circumference of the balance weight (60). The weight portion (61) protrudes outward from the drive shaft (40). The weight portion (61) protrudes in a direction opposite to the direction in which the eccentric shaft portion (42) is decentered from the main shaft portion (41) in the drive shaft (40).

[0047] The cover (63) covers the entire balance weight (60) including the weight portion (61) and the non-weight portion (62).(Electric Motor)

[0048] The electric motor (70) is also referred to as a motor. The electric motor (70) is provided below the balance weight (60) and above the lower bearing member (80) in the casing (20). The electric motor (70) is a type of the device (J) in the casing (20). The electric motor (70) rotates the drive shaft (40) to drive the compression mechanism (30). The electric motor (70) includes a rotor (71), a stator (72), coils (73), and insulators (74).

[0049] The rotor (71) is also referred to as a rotor. The rotor (71) is made of metal. The rotor (71) has a cylindrical shape extending in the axial direction (the upper-lower direction). The rotor (71) is coupled to the main shaft portion (41) of the drive shaft (40). The main shaft portion (41) of the drive shaft (40) is inserted to and fixed to the inner periphery of the rotor (71). The rotor (71) rotates integrally with the drive shaft (40).

[0050] The rotor (71) is provided with a plurality of inner refrigerant passages (75). The inner refrigerant passages (75) penetrate the thick portion of the rotor (71) in the axial direction (the upper-lower direction). The plurality of inner refrigerant passages (75) are arranged at predetermined intervals in the circumferential direction of the rotor (71).

[0051] The stator (72) is also referred to as a stator. The stator (72) is made of metal. The stator (72) has a cylindrical shape extending in the axial direction (the upper-lower direction). The stator (72) is fixed to the inner peripheral surface of the barrel (21) of the casing (20). The stator (72) is disposed to surround the outer periphery of the rotor (71). The stator (72) and the rotor (71) are spaced apart from each other by a predetermined distance in the radial direction. The rotor (71) is rotatably inserted into radially inside the stator (72).

[0052] The outer periphery of the stator (72) is provided with a plurality of core cuts (72a). The core cuts (72a) are grooves extending in the axial direction (the upper-lower direction). The core cuts (72a) are arranged at intervals in the circumferential direction of the stator (72). An outer refrigerant passage (76) is provided between the core cuts (72a) at the outer periphery of the stator (72) and the inner peripheral surface of the barrel (21) of the casing (20).

[0053] The coils (73) are fixed to the stator (72). Multiple coils (73) (three or more coils) are provided to correspond to the three phases of U, V, and W. The coils (73) are arranged at intervals in the circumferential direction of the stator (72). An inter-coil refrigerant passage (77) is provided between each pair of coils (73) adjacent to each other in the circumferential direction.

[0054] Each coil (73) includes an upper coil end protruding further upward than the upper end of the stator (72) and a lower coil end protruding further downward than the lower end of the stator (72).

[0055] A lead wire (73a) as the wire (K) is drawn from the coil (73) of each phase. There are three lead wires (73a) corresponding to the three phases of U, V, and W. The lead wires (73a) are drawn upward of the electric motor (70).

[0056] The insulators (74) are made of resin. There are two insulators (74). The insulators (74) are arranged above and below the stator (72). The insulators (74) provide insulation between the stator (72) and the coils (73).(Lower Bearing Member)

[0057] The lower bearing member (80) has a substantially cylindrical shape extending in the axial direction (the upper-lower direction). The lower bearing member (80) is provided between the electric motor (70) and the oil reservoir (27) (the lower bottom portion of the casing (20)) in the casing (20). The lower bearing member (80) includes a cylindrical portion (81), a protrusion (82), and an oil separation plate (83).

[0058] The cylindrical portion (81) has a cylindrical shape. The cylindrical portion (81) houses the main shaft portion (41) of the drive shaft (40). The bearing (81a) is fitted to the inner periphery of the cylindrical portion (81). The main shaft portion (41) of the drive shaft (40) is rotatably supported by the cylindrical portion (81) of the lower bearing member (80) via the bearing (81a).

[0059] The protrusion (82) protrudes outward from the cylindrical portion (81), and is fixed to the inner peripheral surface of the barrel (21) of the casing (20).

[0060] The oil separation plate (83) is fixed to the cylindrical portion (81) and extends in the radial direction and the circumferential direction. The oil separation plate (83) faces the oil reservoir (27). The refrigerant (G) contains the lubricant (L). When the refrigerant (G) hits the oil separation plate (83), the lubricant (L) is separated from the refrigerant (G), and the separated lubricant (L) falls into the oil reservoir (27).(Oil Pump)

[0061] The oil pump (90) includes a pump portion (91) and a nozzle portion (92). The pump portion (91) is provided at a lower end of the main shaft portion (41) of the drive shaft (40). The pump portion (91) rotates integrally with the drive shaft (40). The nozzle portion (92) is fixed to a lower end of the cylindrical portion (81) of the lower bearing member (80). The nozzle portion (92) is immersed in the lubricant (L) stored in the oil reservoir (27).

[0062] The oil pump (90) sucks up the lubricant (L) from the oil reservoir (27). The lubricant (L) is supplied to the sliding portions of the compressor (10) through an oil passage (not shown) inside the drive shaft (40).(Operation of Compressor)

[0063] An operation of the compressor (10) will be described below. When the electric motor (70) is driven, the drive shaft (40) rotates, and the movable scroll (35) of the compression mechanism (30) is driven. The movable scroll (35) revolves around the axis (41a) of the main shaft portion (41) of the drive shaft (40) while being restricted from rotating.

[0064] A low-pressure refrigerant (G) is sucked into the compression chamber (C) of the compression mechanism (30) in the casing (20) through the suction pipe (25), and is compressed to be a high-pressure refrigerant (G). The high-pressure refrigerant (G) is discharged from the compression chamber (C) to the discharge chamber (A) through the discharge port (32a) of the fixed scroll (31). The high-pressure refrigerant (G) flows from the discharge chamber (A) into the discharge space (B) below the housing (50) through a discharge passage (not shown) formed in the fixed scroll (31) and the housing (50). The high-pressure refrigerant (G) is discharged from the discharge space (B) to the outside of the casing (20) (e.g., to the condenser (2) of the refrigerant circuit (1a)) through the discharge pipe (26).

[0065] Although not described in detail, part of the refrigerant (G) circulates around the electric motor (70) through the inner refrigerant passages (75), the outer refrigerant passage (76), and the inter-coil refrigerant passages (77).(Outer Wall of Casing, Terminal Rod, Terminal Body, and Terminal Box)

[0066] Hereinafter, a relationship among the outer wall (28) of the casing (20), the terminal rod (100), the terminal body (110), and the terminal box (120) will be described with reference to FIGS. 3 to 6.

[0067] FIG. 3 shows the outer wall (28) of the casing (20), the terminal rod (100), the terminal body (110), and the terminal box (120) in a front sectional view. FIG. 4 shows the terminal rod (100) and the terminal body (110) in a perspective view. FIG. 5 shows the outer wall (28) of the casing (20) and the terminal box (120) as viewed above in the direction of arrow V in a plan view. FIG. 6 shows the terminal rod (100), the terminal body (110), and the terminal box (120) as viewed from the side in the direction of arrow VI in a side view.(Outer Wall of Casing)

[0068] As illustrated in FIG. 3, the barrel (21) of the casing (20) has the outer wall (28). The outer wall (28) partitions the inside and the outside of the casing (20). The outer wall (28) extends in the axial direction (the upper-lower direction) and circumferential direction of the drive shaft (40). The inner surface of the outer wall (28) faces the inside of the casing (20). The outer surface of the outer wall (28) faces the outside of the casing (20). The outer wall (28) is made of metal.

[0069] The outer wall (28) of the casing (20) has an arc shape when viewed in the axial direction (the upper-lower direction) to correspond to the cylindrical shape of the barrel (21) of the casing (20) (see FIG. 5). The outer wall (28) is provided with a seat portion (28a). The seat portion (28a) is flat.

[0070] A first hole (29) is formed in the seat portion (28a) of the outer wall (28). The first hole (29) has a circular shape. The first hole (29) penetrates the outer wall (28). The first hole (29) allows the inside and outside of the casing (20) to communicate with each other.

[0071] The first hole (29) is located near the upper end of the electric motor (70) (specifically, slightly above the upper coil ends of the coils (73)) in the axial direction (the upper-lower direction).(Terminal Rod)

[0072] As illustrated in FIG. 3, the terminal rod (100) has a rod shape. The terminal rod (100) extends straight. The terminal rod (100) is made of metal.

[0073] The terminal rod (100) is disposed in the first hole (29) of the outer wall (28). The terminal rod (100) penetrates through the first hole (29) of the outer wall (28). One end (101) of the terminal rod (100) is located inside the casing (20) relative to the outer wall (28). The other end (102) of the terminal rod (100) is located outside the casing (20) relative to the outer wall (28).

[0074] The lead wires (73a) as the wires (K) to the electric motor (70) in the casing (20) are connected to the one end (101) of the terminal rod (100). The other end (102) of the terminal rod (100) is connected to an external power source (not shown) via a power supply cable (not shown).

[0075] There are three terminal rods (100) corresponding to the three phases of U, V, and W. The terminal rod (100) of each of the phases corresponds to the lead wires (73a) of each of the phases.(Terminal Body)

[0076] As illustrated in FIG. 3, the terminal body (110) has a bottomed cylindrical shape. The terminal body (110) is hollow. The terminal body (110) is made of metal. The terminal body (110) is formed by pressing. The terminal body (110) is disposed in the first hole (29) of the outer wall (28). The terminal body (110) includes a first tubular portion (111), a locking portion (112), and a lid (113).

[0077] The first tubular portion (111) of the terminal body (110) has a cylindrical shape. The first tubular portion (111) of the terminal body (110) extends straight. The first tubular portion (111) of the terminal body (110) has a circular cross section when viewed in the extension direction of the first tubular portion (111) (see FIG. 6).

[0078] The first tubular portion (111) penetrates through the first hole (29) of the outer wall (28). One end of the first tubular portion (111) is located inside the casing (20) relative to the outer wall (28). The other end of the first tubular portion (111) is located outside the casing (20) relative to the outer wall (28). The outer diameter of the first tubular portion (111) is slightly less than the inner diameter of the first hole (29) of the outer wall (28).

[0079] The locking portion (112) is provided at the one end of the first tubular portion (111). The locking portion (112) is located inside the casing (20) relative to the outer wall (28). The locking portion (112) is formed by increasing the diameter of the one end of the first tubular portion (111). The outer diameter of the locking portion (112) is larger than the outer diameter of the first tubular portion (111). The outer diameter of the locking portion (112) is larger than the inner diameter of the first hole (29) of the outer wall (28).

[0080] The lid (113) closes the opening of the first tubular portion (111) at the other end. The lid (113) is located outside the casing (20) relative to the outer wall (28).

[0081] The terminal body (110) is fixed to the outer wall (28) of the casing (20). The first tubular portion (111) of the terminal body (110) passes through the first hole (29) of the outer wall (28). The first tubular portion (111) is fitted in the first hole (29). The locking portion (112) of the terminal body (110) is in contact with and hooked on the peripheral edge of the first hole (29) on the inner surface of the outer wall (28).

[0082] The first tubular portion (111) of the terminal body (110) protrudes in a separation direction (E) which is a direction away from the outer wall (28) of the casing (20). The first tubular portion (111) of the terminal body (110) extends straight in the separation direction (E). In this example, the separation direction (E) coincides with the direction radially outward of the drive shaft (40). The separation direction (E) is also the direction toward the other end in the extension direction of the first tubular portion (111) of the terminal body (110). The separation direction (E) is also the direction toward the other ends in the extension direction of the terminal rods (100).

[0083] As illustrated in FIG. 4, the terminal body (110) holds the terminal rods (100). The terminal rods (100) are housed in the first tubular portion (111) of the terminal body (110). The terminal rods (100) pass through a hole (not shown) formed in the lid (113) of the terminal body (110) in the separation direction (E). The other ends (102) of the terminal rods (100) are located on the separation direction (E) side relative to the lid (113) of the terminal body (110).

[0084] The terminal rods (100) and the terminal body (110) are electrically insulated from each other by an insulator (130). The insulator (130) is made of glass. The insulator (130) is interposed between the terminal rods (100) and the lid (113) of the terminal body (110).(Terminal Box)

[0085] As illustrated in FIG. 3, the terminal box (120) has a box shape. The terminal box (120) has a rectangular parallelepiped shape. The terminal box (120) is made of metal. The terminal box (120) is located outside the casing (20) relative to the outer wall (28). The terminal box (120) is fixed to the outer wall (28) of the casing (20).

[0086] The terminal box (120) protects the terminal rods (100) housed in a housing space (120a) described later. The terminal box (120) is also used for maintenance.

[0087] The terminal box (120) includes a bottom wall (121), a second hole (122), a sidewall (123), a lid (124), a cable gland (125), and a second tubular portion (126).

[0088] As illustrated in FIGS. 3 and 5, the bottom wall (121) extends in the axial direction (the upper-lower direction) and circumferential direction of the drive shaft (40) to correspond to the outer wall (28) of the casing (20). The bottom wall (121) has an arc shape when viewed in the axial direction (the upper-lower direction) to correspond to the arc shape of the outer wall (28) of the casing (20) (the cylindrical shape of the barrel (21) of the casing (20)). The bottom wall (121) is a quadrangular plate bent in an arc shape.

[0089] The bottom wall (121) is provided with a seat portion (121a). The seat portion (121a) is flat. The seat portion (121a) of the bottom wall (121) corresponds to the seat portion (28a) of the outer wall (28). The bottom wall (121) (specifically, the seat portion (121a) of the bottom wall (121)) has a thickness (t).

[0090] The bottom wall (121) is fixed to the outer wall (28) of the casing (20). As illustrated in FIG. 5, since the outer wall (28) and the bottom wall (121) are both arc-shaped, a gap (H) is likely to be formed between the outer wall (28) and the bottom wall (121).

[0091] The second hole (122) is formed in the seat portion (121a) of the bottom wall (121). The second hole (122) has a circular shape. The second hole (122) penetrates the bottom wall (121). The second hole (122) of the bottom wall (121) overlaps with the first hole (29) of the outer wall (28).

[0092] The first tubular portion (111) of the terminal body (110) passes through the second hole (122) formed in the bottom wall (121) of the terminal box (120). The first tubular portion (111) of the terminal body (110) protrudes in the separation direction (E) beyond the bottom wall (121) of the terminal box (120) by an amount at least greater than the thickness (t) of the bottom wall (121). The lid (113) of the terminal body (110) is located on the separation direction (E) side relative to the bottom wall (121) of the terminal box (120). The terminal rods (100) held by the terminal body (110) are located on the separation direction (E) side relative to the bottom wall (121) of the terminal box (120).

[0093] The sidewall (123) extends (stands) in the separation direction (E) from the peripheral edge of the bottom wall (121) having a rectangular plate shape. The sidewall (123) has a quadrangular tubular shape. The bottom wall (121) closes an open end of the quadrangular tubular sidewall (123) on the side opposite to the separation direction (E) side (the side closer to the outer wall (28) of the casing (20)).

[0094] The lid (124) has a quadrangular plate shape. The lid (124) closes the open end of the quadrangular tubular sidewall (123) on the separation direction (E) side. A seal member (124a) is interposed between the sidewall (123) and the lid (124).

[0095] A housing space (120a) is formed in a region surrounded by the bottom wall (121), the sidewall (123), and the lid (124) in the terminal box (120) (inside the terminal box (120)). The bottom wall (121), the sidewall (123), and the lid (124) partition the housing space (120a) inside the terminal box (120) from an external space (120b) outside the terminal box (120).

[0096] The housing space (120a) in the terminal box (120) has an internal volume (V). As the internal volume (V) decreases, the amount of air (containing oxygen) present in the housing space (120a) in the terminal box (120) decreases. As the internal volume (V) increases, the amount of air present in the housing space (120a) in the terminal box (120) increases.

[0097] The terminal box (120) houses the terminal rods (100) held by the terminal body (110) in the housing space (120a). Specifically, a portion of terminal rod (100) protruding in the separation direction (E) beyond the lid (113) of the terminal body (110) is housed in the housing space (120a) in the terminal box (120).

[0098] The cable gland (125) is substantially cylindrical. The cable gland (125) passes through a hole (not shown) formed in the sidewall (123). A seal member (not shown) is interposed between the hole in the sidewall (123) and the cable gland (125).

[0099] A power supply cable (not shown) connected to the other ends (102) of the terminal rods (100) housed in the housing space (120a) in the terminal box (120) passes through the cable gland (125) and is connected to an external power source (not shown) disposed in the external space (120b) outside the terminal box (120).

[0100] As illustrated in FIG. 3, the second tubular portion (126) extends from the peripheral edge (122a) of the second hole (122) formed in the bottom wall (121) in the separation direction (E) away from the outer wall (28) of the casing (20). The second tubular portion (126) has a cylindrical shape. The second tubular portion (126) extends straight in the separation direction (E). The second tubular portion (126) extends in the separation direction (E) by the entire length (L0). The second tubular portion (126) is disposed in the housing space (120a) in the terminal box (120).

[0101] The first tubular portion (111) of the terminal body (110) is inserted in the second tubular portion (126) of the terminal box (120). Specifically, the first tubular portion (111) of the terminal body (110) is fitted in the second tubular portion (126) of the terminal box (120).

[0102] The first tubular portion (111) of the terminal body (110) and the second tubular portion (126) of the terminal box (120) are fitted to each other. Specifically, the first tubular portion (111) of the terminal body (110) and the second tubular portion (126) of the terminal box (120) are in a clearance fit relationship.

[0103] In this example, a distal end of the first tubular portion (111) on the separation direction (E) side (the connection portion with the lid portion (113)) of the terminal body (110) slightly protrudes in the separation direction (E) relative to the distal end of the second tubular portion (126) of the terminal box (120) on the separation direction (E) side.

[0104] As illustrated in FIG. 6, a clearance (T) is formed between the outer peripheral surface of the first tubular portion (111) of the terminal body (110) and the inner peripheral surface of the second tubular portion (126) of the terminal box (120). The clearance (T) between the outer peripheral surface of the first tubular portion (111) of the terminal body (110) and the inner peripheral surface of the second tubular portion (126) of the terminal box (120) is set to have a predetermined value or less based on the design criteria of the safety clearance shown later in Table 1.

[0105] The clearance (T) is the sum of a first clearance (T1) at an arbitrary point between the first tubular portion (111) and the second tubular portion (126) and a second clearance (T2) located 180 degrees opposite the first clearance (T1) (at a point rotationally symmetric with respect to the center of each tubular portion).

[0106] The insertion length (L1) of the first tubular portion (111) of the terminal body (110) inserted into the second tubular portion (126) of the terminal box (120) is set to be equal to or greater than a predetermined value based on the design criteria of the safety clearance shown later in Table 1. The insertion length (L1) is the length of the part where the clearance (T) is maintained at or below a predetermined value. The insertion length (L1) is also referred to as a fitting length.

[0107] A corner of a distal end of the first tubular portion (111) on the separation direction (E) side (a connection portion with the lid (113)) of the terminal body (110) is formed into a rounded corner (111a) having an arc shape. At the rounded corner (111a), the clearance (T) between the first tubular portion (111) and the second tubular portion (126) may not be equal to or less than the predetermined value. The insertion length (L1) is preferably set without including the rounded corner (111a).

[0108] In this example, the insertion length (L1) of the first tubular portion (111) of the terminal body (110) inserted into the second tubular portion (126) of the terminal box (120) is shorter than the entire length (L0) by the length excluding the rounded corner (111a).(Safety Clearance)

[0109] If there is an abnormality while the compressor (10) is in operation, a flame (F) may be generated in the housing space (120a) inside the terminal box (120) housing the terminal rods (100). The flame (F) grows in the presence of oxygen. The atmosphere in the external space (120b) outside the terminal box (120) contains a large amount of oxygen, and it is necessary to prevent the flame (F) generated in the housing space (120a) inside the terminal box (120) from exiting to the external space (120b) outside the terminal box (120).

[0110] The flame (F) is generated, for example, as follows. If an abnormality occurs during the operation of the compressor (10) and causes a large current to flow through the terminal rods (100), the insulator (130) between the terminal rods (100) and the terminal body (110) melts, and the terminal rods (100) are detached from the terminal body (110). The terminal rods

[0111] (100) detached from the terminal body (110) may be blown away by the internal pressure of the compressor (10) and come into contact with the metal casing (20). At this time, a spark is generated between the terminal rods (100) and the casing (20).

[0112] If the refrigerant (G) used in the compressor (10) is flammable, the refrigerant (G) that leaks out of the casing (20) through the portion from which the terminal rods (100) are detached (the first hole (29) of the outer wall (28) of the casing (20)) is mixed with the air (containing oxygen) outside the casing (20), generating a flammable atmosphere. If the spark is generated in this state, ignition may be generated outside the casing (20) and cause the flame (F).

[0113] Thus, the terminal box (120) is fixed to the outer wall (28) of the casing (20) to cover the first hole (29) in the outer wall (28) of the casing (20). The flame (F) generated outside the casing (20) is confined in the housing space (120a) inside the terminal box (120) (the flame (F) is generated in the housing space (120a) inside the terminal box (120)).

[0114] As described above, since the atmosphere in the external space (120b) outside the terminal box (120) contains a large amount of oxygen, it is necessary to prevent the flame (F) generated in the housing space (120a) inside the terminal box (120) from exiting into the external space (120b) outside the terminal box (120).

[0115] As illustrated in FIG. 3, the flame (F) generated in the housing space (120a) inside the terminal box (120) inevitably passes through the clearance (T) between the first tubular portion (111) of the terminal body (110) and the second tubular portion (126) of the terminal box (120) to exit into the external space (120b) outside the terminal box (120).

[0116] The idea of safety clearance is to extinguish the flame (F) by cooling and smothering the flame (F) passing through the clearance (T) while the flame (F) is passing through the clearance (T).

[0117] Table 1 shows the design criteria for the safety clearance. [Table 1]Insertion Length (L1) [mm]Maximum Clearance (T) [mm]Internal Volume (V) ≤ 100 [cm 2< ]100 [cm 2< ] < Internal Volume (V) ≤ 500 [cm 2< ]500 [cm 2< ] < Internal Volume (V) ≤ 2000 [cm 2< ]2000 [cm 2< ] < Internal Volume (V)6 < L ≤ 9.50.3---9.5 < L ≤ 12.50.30.30.08-12.5 < L ≤ 250.30.30.30.225 < L0.40.40.40.4

[0118] The safety clearance is the maximum clearance (T) that can extinguish the flame (F) while the flame (F) is passing through the clearance (T). The clearance (T) may be set to the value shown in Table 1 or less.

[0119] The maximum clearance (T) (safety clearance) is determined according to the type of the refrigerant (G), the insertion length (L1), and the internal volume (V). The unit of the maximum clearance (T) (safety clearance) is [mm]. The unit of the insertion length (L1) is [mm]. The unit of the internal volume (V) is [cm 2< ].

[0120] Table 1 shows an example in which the type of refrigerant (G) is propane, but the values can sufficiently be applied to the other types of refrigerant. Propane is highly flammable, and the value of the clearance (T) shown in Table 1 is set to be tight (small). When a refrigerant (G) other than propane is used, the value of the clearance (T) may be set to be less stringent (larger) than the value shown in Table 1.

[0121] As shown in Table 1, the maximum clearance (T) (safety clearance) decreases as the insertion length (L1) decreases, and increases as the insertion length (L1) increases. The maximum clearance (T) (safety clearance) increases as the internal volume (V) decreases, and decreases as the internal volume (V) increases.

[0122] As shown in Table 1, the maximum clearance (T) (safety clearance) between the first tubular portion (111) of the terminal body (110) and the second tubular portion (126) of the terminal box (120) is preferably equal to or less than 0.4 mm.

[0123] As shown in Table 1, the insertion length (L1) of the first tubular portion (111) of the terminal body (110) inserted into the second tubular portion (126) of the terminal box (120) is preferably equal to or greater than 6 mm.(Advantages)

[0124] As illustrated in FIG. 3, in the compressor (10) of the present embodiment, the flame (F) generated in the housing space (120a) inside the terminal box (120) passes through the clearance (T) between the first tubular portion (111) of the terminal body (110) and the second tubular portion (126) of the terminal box (120) to exit into the external space (120b) outside the terminal box (120). The flame (F) is extinguished while passing through the clearance (T).

[0125] The compressor (10) of the present embodiment can prevent the flame (F) generated in the housing space (120a) inside the terminal box (120) from exiting into the external space (120b) outside the terminal box (120).

[0126] Setting the insertion length (L1) of the first tubular portion (111) of the terminal body (110) inserted into the second tubular portion (126) of the terminal box (120) to be equal to or greater than 6 mm is more advantageous in terms of extinguishing the flame (F) while the flame (F) is passing through the clearance (T).

[0127] Setting the maximum clearance (T) (safety clearance) between the first tubular portion (111) of the terminal body (110) and the second tubular portion (126) of the terminal box (120) to be equal to or less than 0.4 mm is more advantageous in extinguishing the flame (F) while the flame (F) is passing through the clearance (T).

[0128] Since the first tubular portion (111) of the terminal body (110) extends straight and has a circular cross section (is cylindrical), and in addition, the second tubular portion (126) of the terminal box (120) extends straight and is cylindrical, insertion of the first tubular portion (111) of the terminal body (110) into the second tubular portion (126) of the terminal box (120) is facilitated.

[0129] The lead wires (73a) as the wires (K) to the electric motor (70) in the casing (20) are connected to the terminal rods (100). A large current is likely to flow through the terminal rods (100) connected to the electric motor (70) via the lead wires (73a). It is beneficial to take measures against the flame (F) that may be generated around the terminal rods (100) where the large current is likely to occur.

[0130] As illustrated in FIG. 5, the outer wall (28) of the casing (20) has an arc shape (the barrel (21) of the casing (20) is cylindrical), and a gap (H) is likely to be formed between the outer wall (28) of the casing (20) and the bottom wall (121) of the terminal box (120). More specifically, a large gap (H) is unavoidably formed between the outer wall (28) and the bottom wall (121).

[0131] It is difficult to keep the gap (H) equal to or less than the safety clearance. If the gap (H) is to be kept equal to or less than the safety clearance, complicated work such as caulking the gap (H) or filling the gap (H) with a seal member is required.

[0132] FIG. 9 is a view corresponding to FIG. 3, according to prior art. In a compressor (10') according to the prior art, a terminal body (110') does not protrude in a direction away from the outer wall (28) of the casing (20). In the prior art compressor (10'), the terminal box (120') is not provided with a second tubular portion (126). In this configuration, the gap (H) between the outer wall (28) of the casing (20) and the bottom wall (121') of the terminal box (120') needs to be equal to or less than the safety clearance. For this purpose, the prior art compressor (10') requires caulking the gap (H) or filling the gap (H) with a seal member to keep the gap (H) equal to or less than the safety clearance.

[0133] In the compressor (10) of the present embodiment, the clearance (T) between the first tubular portion (111) of the terminal body (110) and the second tubular portion (126) of the terminal box (120) is equal to or less than the safety clearance. The compressor (10) of the present embodiment does not require any complicated work on the gap (H) between the outer wall (28) of the casing (20) and the bottom wall (121) of the terminal box (120), such as caulking the gap (H) or filling the gap (H) with a seal member, as in the prior art compressor (10').

[0134] According to the compressor (10) of the present embodiment, the safety clearance can be secured more easily than in the prior art compressor (10').

[0135] According to the compressor (10) of the present embodiment, the advantage of inserting the first tubular portion (111) of the terminal body (110) into the second tubular portion (126) of the terminal box (120) can be more significant because the gap (H) is easily formed between the arc-shaped outer wall (28) of the casing (20) and the bottom wall (121) of the terminal box (120).<Second Embodiment>

[0136] A compressor (10) of a second embodiment will be described below. FIG. 7 is a view corresponding to FIG. 3, according to the second embodiment. In the following description, the same components as those of the above embodiment are denoted by the same reference numerals, and their detailed descriptions may be omitted.

[0137] In the present embodiment, the terminal body (110) has a solid column shape (circular rod shape). The terminal body (110) extends straight. The terminal body (110) has a circular cross section when viewed in the extension direction of the terminal body (110).

[0138] The other configurations are the same as those of the first embodiment.<Third Embodiment>

[0139] A compressor (10) of a third embodiment will be described below. FIG. 8 is a view corresponding to FIG. 3, according to the third embodiment. FIG. 8 is simpler than FIG. 3. In the following description, the same components as those of the above embodiment are denoted by the same reference numerals, and their detailed descriptions may be omitted.

[0140] In the present embodiment, the terminal body (110) is tapered, and has a diameter decreasing as it extends in the separation direction (E). The second tubular portion (126) of the terminal box (120) is tapered, and has a diameter decreasing as it extends in the separation direction (E).

[0141] The other configurations are similar to those of the first embodiment and the second embodiment.<Other Embodiments>

[0142] The value of the maximum clearance (T) (safety clearance) and the value of the insertion length (L1) are not necessarily set according to Table 1. For example, when the refrigerant (G) used is not propane which is highly flammable, these values may be set to be less stringent than the values shown in Table 1. The maximum clearance (T) (safety clearance) may be greater than 0.4 mm. The insertion length (L1) may be less than 6 mm.

[0143] The refrigerant (G) may be other than propane. The refrigerant (G) may be any of highly flammable refrigerants, flammable refrigerants, weak flammable refrigerants, and nonflammable refrigerants. The refrigerant (G) may be other refrigerant than propane (R290), such as ammonia (R717), methane (R50), ethane (R170), butane (R600), isobutane (R600a), R152a, R32, R1234yf, R1234ze, R410A, R134a, and R407C. The refrigerant (G) may be a refrigerant mixture containing two or more of these refrigerants. The refrigerant (G) may be other than those described above.

[0144] In the third embodiment, the terminal body (110) and the second tubular portion (126) of the terminal box (120) may be tapered and may have diameters increasing as they extend in the separation direction (E).

[0145] The second tubular portion (126) of the terminal box (120) may have, for example, a polygonal tubular shape instead of a cylindrical shape. The terminal body (110) may have a polygonal cross section.

[0146] The distal end of the second tubular portion (126) of the terminal box (120) on the separation direction (E) side may protrude relative to the distal end of the terminal body (110) on the separation direction (E) side. Alternatively, both may be flush with each other.

[0147] The outer wall (28) of the casing (20) may have a flat shape, instead of an arc shape.

[0148] In the above embodiments, the first tubular portion (111) of the terminal body (110) and the second tubular portion (126) of the terminal box (120) are in a clearance fit relationship, but it is not limited to this example, and they may be in an interference fit relationship or a transition fit relationship. The clearance (T) may be zero (the clearance (T) is rather preferably zero).

[0149] In the above embodiments, the electric motor (70) is described as an example of the device (J), from which the wires (K) are connected to the terminal rods (100), in the casing (20)), but it is not limited to this example. The device (J) in the casing (20) may be, for example, another device such as a measurement device or a magnetic bearing.

[0150] The compressor (10) may be horizontally placed. The axial direction (Z) of the drive shaft (40) may extend in the horizontal direction.

[0151] The compressor (10) is not limited to a scroll compressor, and may be a rotary compressor, a screw compressor, or a turbo compressor, for example.

[0152] The compressor (10) may not be applied to the refrigeration apparatus (1), and may be used alone, for example.

[0153] While the embodiments have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the claims. The elements according to the embodiments, the variations thereof, and the other embodiments may be combined and replaced with each other.DESCRIPTION OF REFERENCE CHARACTERS

[0154] ESeparation Direction (Direction) KWire VInternal Volume L1Insertion Length TClearance FFlame 1Refrigeration Apparatus 10Compressor 20Casing 21Barrel 28Outer Wall 29First Hole 30Compression Mechanism 40Drive Shaft 50Housing 60Balance Weight 70Electric Motor 73Coil 73aLead Wire 80Lower Bearing Member 90Oil Pump 100Terminal Rod 110Terminal Body 111First Tubular Portion 120Terminal Box 120aHousing Space 120bExternal Space 121Bottom Wall 122Second Hole 122aPeripheral Edge 126Second Tubular Portion

Examples

first embodiment

[0023]A compressor (10) of a first embodiment will be described below. The compressor (10) is applied to a refrigeration apparatus (1). FIG. 1 illustrates the refrigeration apparatus (1). The refrigeration apparatus (1) includes a refrigerant circuit (1a) in which a refrigerant as a working fluid circulates. The refrigerant circuit (1a) of the refrigeration apparatus (1) includes a compressor (10), a condenser (a radiator) (2), a decompression mechanism (an expansion mechanism) (3), and an evaporator (4). The decompression mechanism (3) is, for example, an expansion valve or a capillary tube. The refrigerant circuit (1a) performs a vapor compression refrigeration cycle. The refrigeration apparatus (1) is applied to, for example, an air conditioner and a cooler.

(Compressor)

[0024]FIG. 2 shows the compressor (10) in a front sectional view. In this example, the compressor (10) is a scroll compressor. The compressor (10) includes a casing (20), a compression mechanism (30), a drive shaft...

third embodiment

[0144]In the third embodiment, the terminal body (110) and the second tubular portion (126) of the terminal box (120) may be tapered and may have diameters increasing as they extend in the separation direction (E).

[0145]The second tubular portion (126) of the terminal box (120) may have, for example, a polygonal tubular shape instead of a cylindrical shape. The terminal body (110) may have a polygonal cross section.

[0146]The distal end of the second tubular portion (126) of the terminal box (120) on the separation direction (E) side may protrude relative to the distal end of the terminal body (110) on the separation direction (E) side. Alternatively, both may be flush with each other.

[0147]The outer wall (28) of the casing (20) may have a flat shape, instead of an arc shape.

[0148]In the above embodiments, the first tubular portion (111) of the terminal body (110) and the second tubular portion (126) of the terminal box (120) are in a clearance fit relationship, but it is not limited...

TECHNICAL FIELD

[0001] The present disclosure relates to a compressor and a refrigeration apparatus.BACKGROUND ART

[0002] Patent Document 1 discloses a compressor including a terminal box provided on a peripheral wall of a casing to protect a terminal.CITATION LISTPATENT DOCUMENT

[0003] Patent Document 1: Japanese Utility Model Publication No. S61-032761SUMMARY OF THE INVENTIONTECHNICAL PROBLEM

[0004] This type of compressor includes a compression mechanism, a casing, a terminal rod, a terminal body, and a terminal box. The casing houses the compression mechanism. A wire to the device in the casing is connected to the terminal rod. The terminal body holds the terminal rod and is fixed to the outer wall of the casing. The terminal box is fixed to the outer wall of the casing and houses the terminal rod held by the terminal body.

[0005] If an abnormality occurs during the operation of the compressor, there is a risk of generating a flame inside the terminal box housing the terminal rod. The flame grows in the presence of oxygen. The atmosphere outside the terminal box contains a large amount of oxygen, and it is necessary to prevent the flame generated inside the terminal box from exiting to the outside of the terminal box.

[0006] An object of the present disclosure is to prevent, in a compressor, a flame generated inside a terminal box from exiting to the outside of the terminal box.SOLUTION TO THE PROBLEM

[0007] A first aspect of the present disclosure is directed to a compressor (10). The compressor (10) includes: a compression mechanism (30); a casing (20) configured to house the compression mechanism (30); a terminal body (110) fixed to an outer wall (28) of the casing (20) and configured to hold a terminal rod (100) to which a wire (K) to a device (J) in the casing (20) is connected; and a terminal box (120) fixed to the outer wall (28) of the casing (20) and configured to house the terminal rod (100) held by the terminal body (110). The terminal body (110) protrudes in a direction (E) away from the casing (20), the terminal box (120) includes a bottom wall (121) fixed to the outer wall (28) of the casing (20), a hole (122) formed in the bottom wall (121) and through which the terminal body (110) passes, and a tubular portion (126) extending from a peripheral edge (122a) of the hole (122) in the direction (E) away from the casing (20), and the terminal body (110) is inserted into the tubular portion (126).

[0008] According to the compressor (10) of the first aspect, the flame generated inside the terminal box (120) passes through a clearance between the terminal body (110) and the tubular portion (126) of the terminal box (120) to exit the terminal box (120). The flame may be extinguished while passing through the clearance.

[0009] According to the compressor (10) of the first aspect, the flame generated inside the terminal box (120) can be prevented from exiting to the outside of the terminal box (120).

[0010] A second aspect of the present disclosure is directed to the compressor (10) of the first aspect. In the compressor (10), an insertion length (L1) of the terminal body (110) inserted into the tubular portion (126) is equal to or greater than 6 mm.

[0011] The compressor (10) of the second aspect is more advantageous in extinguishing the flame while the flame is passing through the clearance between the terminal body (110) and the tubular portion (126) of the terminal box (120).

[0012] A third aspect of the present disclosure is directed to the compressor (10) of the first or second aspect. In the compressor (10), a clearance (T) between the terminal body (110) and the tubular portion (126) is equal to or less than 0.4 mm.

[0013] The compressor (10) of the third aspect is more advantageous in extinguishing the flame while the flame is passing through the clearance (T) between the terminal body (110) and the tubular portion (126) of the terminal box (120).

[0014] A fourth aspect of the present disclosure is directed to the compressor (10) of any one of the first to third aspects. In the compressor (10), the tubular portion (126) has a cylindrical shape extending straight, and the terminal body (110) extends straight and has a circular cross section.

[0015] According to the compressor (10) of the fourth aspect, the terminal body (110) can be easily inserted into the tubular portion (126) of the terminal box (120).

[0016] A fifth aspect of the present disclosure is directed to the compressor (10) of any one of the first to fourth aspects. The compressor (10) includes an electric motor (70) configured to drive the compression mechanism (30), the casing (20) is configured to house the compression mechanism (30) and the electric motor (70), and a wire (K) to the electric motor (70) is connected to the terminal rod (100).

[0017] In the compressor (10) of the fifth aspect, a large current is likely to flow through the terminal rod (100) connected to the electric motor (70) via the wire (K), and thus, it is beneficial to take measures against a flame that may be generated around the terminal rod (100) through which a large current is likely to flow.

[0018] A sixth aspect of the present disclosure is directed to the compressor (10) of any one of the first to fifth aspects. In the compressor (10), the outer wall (28) has an arc shape.

[0019] In the compressor (10) of the present embodiment, a gap is likely to be formed between the outer wall (28) of the casing (20) and the bottom wall (121) of the terminal box (120). This can enhance the advantage of inserting the terminal body (110) into the tubular portion (126) of the terminal box (120).

[0020] A seventh aspect of the present disclosure is directed to a refrigeration apparatus (1). The refrigeration apparatus (1) includes the compressor (10) of any one of the first to sixth aspects.BRIEF DESCRIPTION OF THE DRAWINGS

[0021] [FIG. 1] FIG. 1 illustrates a refrigeration apparatus (1) of a first embodiment. [FIG. 2] FIG. 2 is a front sectional view of a compressor (10) of the first embodiment. [FIG. 3] FIG. 3 is a front sectional view of an outer wall (28) of a casing (20), a terminal rod (100), a terminal body (110), and a terminal box (120) of the first embodiment. [FIG. 4] FIG. 4 is a perspective view of the terminal rod (100) and the terminal body (110) of the first embodiment. [FIG. 5] FIG. 5 is a plan view of the outer wall (28) of the casing (20) and the terminal box (120) of the first embodiment. [FIG. 6] FIG. 6 is a side view of the terminal rod (100), the terminal body (110), and the terminal box (120) of the first embodiment. [FIG. 7] FIG. 7 is a view corresponding to FIG. 3, according to a second embodiment. [FIG. 8] FIG. 8 is a view corresponding to FIG. 3, according to a third embodiment. [FIG. 9] FIG. 9 is a view corresponding to FIG. 3, according to prior art. DESCRIPTION OF EMBODIMENTS

[0022] Embodiments of the present disclosure will be described in detail below with reference to the drawings. The present disclosure is not limited to the embodiments shown below, and various changes can be made within the scope without departing from the technical concept of the present disclosure. Since each of the drawings is intended to illustrate the present disclosure conceptually, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for ease of understanding.<First Embodiment>(Refrigeration Apparatus)

[0023] A compressor (10) of a first embodiment will be described below. The compressor (10) is applied to a refrigeration apparatus (1). FIG. 1 illustrates the refrigeration apparatus (1). The refrigeration apparatus (1) includes a refrigerant circuit (1a) in which a refrigerant as a working fluid circulates. The refrigerant circuit (1a) of the refrigeration apparatus (1) includes a compressor (10), a condenser (a radiator) (2), a decompression mechanism (an expansion mechanism) (3), and an evaporator (4). The decompression mechanism (3) is, for example, an expansion valve or a capillary tube. The refrigerant circuit (1a) performs a vapor compression refrigeration cycle. The refrigeration apparatus (1) is applied to, for example, an air conditioner and a cooler.(Compressor)

[0024] FIG. 2 shows the compressor (10) in a front sectional view. In this example, the compressor (10) is a scroll compressor. The compressor (10) includes a casing (20), a compression mechanism (30), a drive shaft (40), a housing (50), a balance weight (60), an electric motor (70), a lower bearing member (80), an oil pump (90), a terminal rod (100), a terminal body (110), and a terminal box (120).

[0025] Hereinafter, the direction in which the axis of the drive shaft (40) extends is referred to as an axial direction and denoted by (Z). A direction orthogonal to the axis of the drive shaft (40) is referred to as a radial direction and denoted by (R). A side farther from the axis of the drive shaft (40) in the radial direction is referred to as radially outside or outward and denoted by (Ro). A side closer to the axis of the drive shaft (40) in the radial direction is referred to as radially inside or inward and denoted by (Ri). The direction of rotation of the drive shaft (40) is referred to as a circumferential direction and denoted by (θ).

[0026] The axial direction of the drive shaft (40) extends in an upper-lower direction. The upper-lower direction is denoted by (Z), as is the axial direction. An upper side in the axial direction (the upper-lower direction) is simply referred to as the upper side and is denoted by (Za). A lower side in the axial direction (the upper-lower direction) is simply referred to as the lower side and is denoted by (Zb).

[0027] The compressor (10) is disposed upright. Inside the casing (20), the compression mechanism (30), the housing (50), the balance weight (60), the electric motor (70), the lower bearing member (80), and the oil pump (90) are disposed in this order from top to bottom. The drive shaft (40) extends in the axial direction (the upper-lower direction) in the casing (20).

[0028] As will be described in detail later, the terminal body (110) and the terminal box (120) are fixed to an outer wall (28) of the casing (20). The terminal rod (100) is held by the terminal body (110).(Casing)

[0029] The casing (20) houses the compression mechanism (30), the drive shaft (40), the housing (50), the balance weight (60), the electric motor (70), the lower bearing member (80), and the oil pump (90).

[0030] The casing (20) is a cylindrical sealed container that is elongated in the axial direction (the upper-lower direction). The casing (20) is made of metal. The casing (20) includes a barrel (21), an upper end plate (22), a lower end plate (23), and a leg (24). The barrel (21) has a cylindrical shape with both ends in the axial direction (the upper-lower direction) open. The upper end plate (22) closes an upper end of the barrel (21). The lower end plate (23) closes a lower end of the barrel (21). The leg (24) is provided at the bottom of the lower end plate (23) to support the casing (20) on the base.

[0031] A suction pipe (25) is connected to the casing (20). The suction pipe (25) penetrates the upper end plate (22) of the casing (20) in the axial direction. A discharge pipe (26) is connected to the casing (20). The discharge pipe (26) radially penetrates the barrel (21) of the casing (20).

[0032] A lower bottom portion of the casing (20) forms an oil reservoir (27). The oil reservoir (27) stores a lubricant (L). The lubricant (L) is provided to lubricate sliding portions of the compressor (10).

[0033] The outer wall (28) of the casing (20) will be described later.(Compression Mechanism)

[0034] The compression mechanism (30) is provided in the casing (20). The compression mechanism (30) compresses a refrigerant (G) (e.g., refrigerant gas) as a working fluid. In this example, the refrigerant (G) is propane. Propane is highly flammable and ignites easily. The compression mechanism (30) includes a fixed scroll (31) and a movable scroll (35). The movable scroll (35) meshes with the fixed scroll (31).

[0035] The fixed scroll (31) includes a fixed end plate (32), a fixed wrap (33), and an outer peripheral wall (34). The fixed end plate (32) has a disc shape. The fixed wrap (33) is in the shape of a spiral wall that draws an involute curve, and protrudes downward from a lower surface of the fixed end plate (32). The outer peripheral wall (34) surrounds the outer periphery of the fixed wrap (33), and protrudes downward from the lower surface of the fixed end plate (32).

[0036] The movable scroll (35) is also called an orbiting scroll. The movable scroll (35) is disposed below the fixed scroll (31). The movable scroll (35) includes a movable end plate (36), a movable wrap (37), and a boss (38). The movable end plate (36) has a disc shape. The movable wrap (37) is in the shape of a spiral wall that draws an involute curve, and protrudes upward from an upper surface of the movable end plate (36). The boss (38) has a cylindrical shape and protrudes downward from the center of a lower surface of the movable end plate (36). A bearing (38a) is fitted to the inner periphery of the boss (38).

[0037] In the compression mechanism (30), the movable wrap (37) of the movable scroll (35) meshes with the fixed wrap (33) of the fixed scroll (31). A compression chamber (C) is formed in a region surrounded by the fixed end plate (32) and fixed wrap (33) of the fixed scroll (31) and the movable end plate (36) and movable wrap (37) of the movable scroll (35). The refrigerant (G) is compressed in the compression chamber (C). The compression chamber (C) communicates with the suction pipe (25).

[0038] A discharge port (32a) is formed in the fixed end plate (32) of the fixed scroll (31). The discharge port (32a) axially penetrates a central portion of the fixed end plate (32) to communicate with the compression chamber (C). A discharge chamber (A) is formed in a region between the fixed scroll (31) and the upper end plate (22) of the casing (20). The discharge chamber (A) communicates with the discharge port (32a).(Drive Shaft)

[0039] The drive shaft (40) extends in the axial direction (the upper-lower direction) in the casing (20). The drive shaft (40) has a main shaft portion (41) and an eccentric shaft portion (42). The eccentric shaft portion (42) is provided at an upper end of the main shaft portion (41). The outer diameter of the eccentric shaft portion (42) is less than the outer diameter of the main shaft portion (41). An axis (42a) of the eccentric shaft portion (42) is decentered from an axis (41a) of the main shaft portion (41) by a predetermined distance.

[0040] The eccentric shaft portion (42) of the drive shaft (40) is rotatably supported by the boss (38) of the movable scroll (35) via the bearing (38a).(Housing)

[0041] The housing (50) has a substantially cylindrical shape extending in the axial direction (the upper-lower direction). The housing (50) is provided below the movable scroll (35) and above the balance weight (60) in the casing (20). The drive shaft (40) is inserted to the inner periphery of the housing (50). The outer diameter of the upper portion of the housing (50) is larger than the outer diameter of the lower portion of the housing (50). An outer peripheral surface of the upper portion of the housing (50) is fixed to an inner peripheral surface of the barrel (21) of the casing (20).

[0042] The inner diameter of the upper portion of the housing (50) is larger than the inner diameter of the lower portion of the housing (50). A crank chamber (51) is formed radially inside the upper portion of the housing (50) by a downward recess. The crank chamber (51) houses the boss (38) of the movable scroll (35).

[0043] A main bearing hole (52) is formed radially inside the lower portion of the housing (50). The main bearing hole (52) penetrates the lower portion of the housing (50) in the axial direction (the upper-lower direction), and communicates with the crank chamber (51). A bearing (52a) is fitted to the inner periphery of the main bearing hole (52). The main shaft portion (41) of the drive shaft (40) is rotatably supported in the main bearing hole (52) of the housing (50) via the bearing (52a).

[0044] A discharge space (B) is formed in the casing (20) below the housing (50). The discharge space (B) communicates with the discharge pipe (26).(Balance Weight)

[0045] The balance weight (60) is provided to cancel out an unbalanced force generated by the orbiting motion of the movable scroll (35) of the compression mechanism (30). The balance weight (60) is provided below the housing (50) and above the electric motor (70) in the casing (20). The balance weight (60) is provided on the main shaft portion (41) of the drive shaft (40). The balance weight (60) rotates integrally with the drive shaft (40). The balance weight (60) includes a weight portion (61), a non-weight portion (62), and a cover (63).

[0046] The weight portion (61) is a portion extending in the circumferential direction over substantially half of the circumference of the balance weight (60). The weight portion (61) protrudes outward from the drive shaft (40). The weight portion (61) protrudes in a direction opposite to the direction in which the eccentric shaft portion (42) is decentered from the main shaft portion (41) in the drive shaft (40).

[0047] The cover (63) covers the entire balance weight (60) including the weight portion (61) and the non-weight portion (62).(Electric Motor)

[0048] The electric motor (70) is also referred to as a motor. The electric motor (70) is provided below the balance weight (60) and above the lower bearing member (80) in the casing (20). The electric motor (70) is a type of the device (J) in the casing (20). The electric motor (70) rotates the drive shaft (40) to drive the compression mechanism (30). The electric motor (70) includes a rotor (71), a stator (72), coils (73), and insulators (74).

[0049] The rotor (71) is also referred to as a rotor. The rotor (71) is made of metal. The rotor (71) has a cylindrical shape extending in the axial direction (the upper-lower direction). The rotor (71) is coupled to the main shaft portion (41) of the drive shaft (40). The main shaft portion (41) of the drive shaft (40) is inserted to and fixed to the inner periphery of the rotor (71). The rotor (71) rotates integrally with the drive shaft (40).

[0050] The rotor (71) is provided with a plurality of inner refrigerant passages (75). The inner refrigerant passages (75) penetrate the thick portion of the rotor (71) in the axial direction (the upper-lower direction). The plurality of inner refrigerant passages (75) are arranged at predetermined intervals in the circumferential direction of the rotor (71).

[0051] The stator (72) is also referred to as a stator. The stator (72) is made of metal. The stator (72) has a cylindrical shape extending in the axial direction (the upper-lower direction). The stator (72) is fixed to the inner peripheral surface of the barrel (21) of the casing (20). The stator (72) is disposed to surround the outer periphery of the rotor (71). The stator (72) and the rotor (71) are spaced apart from each other by a predetermined distance in the radial direction. The rotor (71) is rotatably inserted into radially inside the stator (72).

[0052] The outer periphery of the stator (72) is provided with a plurality of core cuts (72a). The core cuts (72a) are grooves extending in the axial direction (the upper-lower direction). The core cuts (72a) are arranged at intervals in the circumferential direction of the stator (72). An outer refrigerant passage (76) is provided between the core cuts (72a) at the outer periphery of the stator (72) and the inner peripheral surface of the barrel (21) of the casing (20).

[0053] The coils (73) are fixed to the stator (72). Multiple coils (73) (three or more coils) are provided to correspond to the three phases of U, V, and W. The coils (73) are arranged at intervals in the circumferential direction of the stator (72). An inter-coil refrigerant passage (77) is provided between each pair of coils (73) adjacent to each other in the circumferential direction.

[0054] Each coil (73) includes an upper coil end protruding further upward than the upper end of the stator (72) and a lower coil end protruding further downward than the lower end of the stator (72).

[0055] A lead wire (73a) as the wire (K) is drawn from the coil (73) of each phase. There are three lead wires (73a) corresponding to the three phases of U, V, and W. The lead wires (73a) are drawn upward of the electric motor (70).

[0056] The insulators (74) are made of resin. There are two insulators (74). The insulators (74) are arranged above and below the stator (72). The insulators (74) provide insulation between the stator (72) and the coils (73).(Lower Bearing Member)

[0057] The lower bearing member (80) has a substantially cylindrical shape extending in the axial direction (the upper-lower direction). The lower bearing member (80) is provided between the electric motor (70) and the oil reservoir (27) (the lower bottom portion of the casing (20)) in the casing (20). The lower bearing member (80) includes a cylindrical portion (81), a protrusion (82), and an oil separation plate (83).

[0058] The cylindrical portion (81) has a cylindrical shape. The cylindrical portion (81) houses the main shaft portion (41) of the drive shaft (40). The bearing (81a) is fitted to the inner periphery of the cylindrical portion (81). The main shaft portion (41) of the drive shaft (40) is rotatably supported by the cylindrical portion (81) of the lower bearing member (80) via the bearing (81a).

[0059] The protrusion (82) protrudes outward from the cylindrical portion (81), and is fixed to the inner peripheral surface of the barrel (21) of the casing (20).

[0060] The oil separation plate (83) is fixed to the cylindrical portion (81) and extends in the radial direction and the circumferential direction. The oil separation plate (83) faces the oil reservoir (27). The refrigerant (G) contains the lubricant (L). When the refrigerant (G) hits the oil separation plate (83), the lubricant (L) is separated from the refrigerant (G), and the separated lubricant (L) falls into the oil reservoir (27).(Oil Pump)

[0061] The oil pump (90) includes a pump portion (91) and a nozzle portion (92). The pump portion (91) is provided at a lower end of the main shaft portion (41) of the drive shaft (40). The pump portion (91) rotates integrally with the drive shaft (40). The nozzle portion (92) is fixed to a lower end of the cylindrical portion (81) of the lower bearing member (80). The nozzle portion (92) is immersed in the lubricant (L) stored in the oil reservoir (27).

[0062] The oil pump (90) sucks up the lubricant (L) from the oil reservoir (27). The lubricant (L) is supplied to the sliding portions of the compressor (10) through an oil passage (not shown) inside the drive shaft (40).(Operation of Compressor)

[0063] An operation of the compressor (10) will be described below. When the electric motor (70) is driven, the drive shaft (40) rotates, and the movable scroll (35) of the compression mechanism (30) is driven. The movable scroll (35) revolves around the axis (41a) of the main shaft portion (41) of the drive shaft (40) while being restricted from rotating.

[0064] A low-pressure refrigerant (G) is sucked into the compression chamber (C) of the compression mechanism (30) in the casing (20) through the suction pipe (25), and is compressed to be a high-pressure refrigerant (G). The high-pressure refrigerant (G) is discharged from the compression chamber (C) to the discharge chamber (A) through the discharge port (32a) of the fixed scroll (31). The high-pressure refrigerant (G) flows from the discharge chamber (A) into the discharge space (B) below the housing (50) through a discharge passage (not shown) formed in the fixed scroll (31) and the housing (50). The high-pressure refrigerant (G) is discharged from the discharge space (B) to the outside of the casing (20) (e.g., to the condenser (2) of the refrigerant circuit (1a)) through the discharge pipe (26).

[0065] Although not described in detail, part of the refrigerant (G) circulates around the electric motor (70) through the inner refrigerant passages (75), the outer refrigerant passage (76), and the inter-coil refrigerant passages (77).(Outer Wall of Casing, Terminal Rod, Terminal Body, and Terminal Box)

[0066] Hereinafter, a relationship among the outer wall (28) of the casing (20), the terminal rod (100), the terminal body (110), and the terminal box (120) will be described with reference to FIGS. 3 to 6.

[0067] FIG. 3 shows the outer wall (28) of the casing (20), the terminal rod (100), the terminal body (110), and the terminal box (120) in a front sectional view. FIG. 4 shows the terminal rod (100) and the terminal body (110) in a perspective view. FIG. 5 shows the outer wall (28) of the casing (20) and the terminal box (120) as viewed above in the direction of arrow V in a plan view. FIG. 6 shows the terminal rod (100), the terminal body (110), and the terminal box (120) as viewed from the side in the direction of arrow VI in a side view.(Outer Wall of Casing)

[0068] As illustrated in FIG. 3, the barrel (21) of the casing (20) has the outer wall (28). The outer wall (28) partitions the inside and the outside of the casing (20). The outer wall (28) extends in the axial direction (the upper-lower direction) and circumferential direction of the drive shaft (40). The inner surface of the outer wall (28) faces the inside of the casing (20). The outer surface of the outer wall (28) faces the outside of the casing (20). The outer wall (28) is made of metal.

[0069] The outer wall (28) of the casing (20) has an arc shape when viewed in the axial direction (the upper-lower direction) to correspond to the cylindrical shape of the barrel (21) of the casing (20) (see FIG. 5). The outer wall (28) is provided with a seat portion (28a). The seat portion (28a) is flat.

[0070] A first hole (29) is formed in the seat portion (28a) of the outer wall (28). The first hole (29) has a circular shape. The first hole (29) penetrates the outer wall (28). The first hole (29) allows the inside and outside of the casing (20) to communicate with each other.

[0071] The first hole (29) is located near the upper end of the electric motor (70) (specifically, slightly above the upper coil ends of the coils (73)) in the axial direction (the upper-lower direction).(Terminal Rod)

[0072] As illustrated in FIG. 3, the terminal rod (100) has a rod shape. The terminal rod (100) extends straight. The terminal rod (100) is made of metal.

[0073] The terminal rod (100) is disposed in the first hole (29) of the outer wall (28). The terminal rod (100) penetrates through the first hole (29) of the outer wall (28). One end (101) of the terminal rod (100) is located inside the casing (20) relative to the outer wall (28). The other end (102) of the terminal rod (100) is located outside the casing (20) relative to the outer wall (28).

[0074] The lead wires (73a) as the wires (K) to the electric motor (70) in the casing (20) are connected to the one end (101) of the terminal rod (100). The other end (102) of the terminal rod (100) is connected to an external power source (not shown) via a power supply cable (not shown).

[0075] There are three terminal rods (100) corresponding to the three phases of U, V, and W. The terminal rod (100) of each of the phases corresponds to the lead wires (73a) of each of the phases.(Terminal Body)

[0076] As illustrated in FIG. 3, the terminal body (110) has a bottomed cylindrical shape. The terminal body (110) is hollow. The terminal body (110) is made of metal. The terminal body (110) is formed by pressing. The terminal body (110) is disposed in the first hole (29) of the outer wall (28). The terminal body (110) includes a first tubular portion (111), a locking portion (112), and a lid (113).

[0077] The first tubular portion (111) of the terminal body (110) has a cylindrical shape. The first tubular portion (111) of the terminal body (110) extends straight. The first tubular portion (111) of the terminal body (110) has a circular cross section when viewed in the extension direction of the first tubular portion (111) (see FIG. 6).

[0078] The first tubular portion (111) penetrates through the first hole (29) of the outer wall (28). One end of the first tubular portion (111) is located inside the casing (20) relative to the outer wall (28). The other end of the first tubular portion (111) is located outside the casing (20) relative to the outer wall (28). The outer diameter of the first tubular portion (111) is slightly less than the inner diameter of the first hole (29) of the outer wall (28).

[0079] The locking portion (112) is provided at the one end of the first tubular portion (111). The locking portion (112) is located inside the casing (20) relative to the outer wall (28). The locking portion (112) is formed by increasing the diameter of the one end of the first tubular portion (111). The outer diameter of the locking portion (112) is larger than the outer diameter of the first tubular portion (111). The outer diameter of the locking portion (112) is larger than the inner diameter of the first hole (29) of the outer wall (28).

[0080] The lid (113) closes the opening of the first tubular portion (111) at the other end. The lid (113) is located outside the casing (20) relative to the outer wall (28).

[0081] The terminal body (110) is fixed to the outer wall (28) of the casing (20). The first tubular portion (111) of the terminal body (110) passes through the first hole (29) of the outer wall (28). The first tubular portion (111) is fitted in the first hole (29). The locking portion (112) of the terminal body (110) is in contact with and hooked on the peripheral edge of the first hole (29) on the inner surface of the outer wall (28).

[0082] The first tubular portion (111) of the terminal body (110) protrudes in a separation direction (E) which is a direction away from the outer wall (28) of the casing (20). The first tubular portion (111) of the terminal body (110) extends straight in the separation direction (E). In this example, the separation direction (E) coincides with the direction radially outward of the drive shaft (40). The separation direction (E) is also the direction toward the other end in the extension direction of the first tubular portion (111) of the terminal body (110). The separation direction (E) is also the direction toward the other ends in the extension direction of the terminal rods (100).

[0083] As illustrated in FIG. 4, the terminal body (110) holds the terminal rods (100). The terminal rods (100) are housed in the first tubular portion (111) of the terminal body (110). The terminal rods (100) pass through a hole (not shown) formed in the lid (113) of the terminal body (110) in the separation direction (E). The other ends (102) of the terminal rods (100) are located on the separation direction (E) side relative to the lid (113) of the terminal body (110).

[0084] The terminal rods (100) and the terminal body (110) are electrically insulated from each other by an insulator (130). The insulator (130) is made of glass. The insulator (130) is interposed between the terminal rods (100) and the lid (113) of the terminal body (110).(Terminal Box)

[0085] As illustrated in FIG. 3, the terminal box (120) has a box shape. The terminal box (120) has a rectangular parallelepiped shape. The terminal box (120) is made of metal. The terminal box (120) is located outside the casing (20) relative to the outer wall (28). The terminal box (120) is fixed to the outer wall (28) of the casing (20).

[0086] The terminal box (120) protects the terminal rods (100) housed in a housing space (120a) described later. The terminal box (120) is also used for maintenance.

[0087] The terminal box (120) includes a bottom wall (121), a second hole (122), a sidewall (123), a lid (124), a cable gland (125), and a second tubular portion (126).

[0088] As illustrated in FIGS. 3 and 5, the bottom wall (121) extends in the axial direction (the upper-lower direction) and circumferential direction of the drive shaft (40) to correspond to the outer wall (28) of the casing (20). The bottom wall (121) has an arc shape when viewed in the axial direction (the upper-lower direction) to correspond to the arc shape of the outer wall (28) of the casing (20) (the cylindrical shape of the barrel (21) of the casing (20)). The bottom wall (121) is a quadrangular plate bent in an arc shape.

[0089] The bottom wall (121) is provided with a seat portion (121a). The seat portion (121a) is flat. The seat portion (121a) of the bottom wall (121) corresponds to the seat portion (28a) of the outer wall (28). The bottom wall (121) (specifically, the seat portion (121a) of the bottom wall (121)) has a thickness (t).

[0090] The bottom wall (121) is fixed to the outer wall (28) of the casing (20). As illustrated in FIG. 5, since the outer wall (28) and the bottom wall (121) are both arc-shaped, a gap (H) is likely to be formed between the outer wall (28) and the bottom wall (121).

[0091] The second hole (122) is formed in the seat portion (121a) of the bottom wall (121). The second hole (122) has a circular shape. The second hole (122) penetrates the bottom wall (121). The second hole (122) of the bottom wall (121) overlaps with the first hole (29) of the outer wall (28).

[0092] The first tubular portion (111) of the terminal body (110) passes through the second hole (122) formed in the bottom wall (121) of the terminal box (120). The first tubular portion (111) of the terminal body (110) protrudes in the separation direction (E) beyond the bottom wall (121) of the terminal box (120) by an amount at least greater than the thickness (t) of the bottom wall (121). The lid (113) of the terminal body (110) is located on the separation direction (E) side relative to the bottom wall (121) of the terminal box (120). The terminal rods (100) held by the terminal body (110) are located on the separation direction (E) side relative to the bottom wall (121) of the terminal box (120).

[0093] The sidewall (123) extends (stands) in the separation direction (E) from the peripheral edge of the bottom wall (121) having a rectangular plate shape. The sidewall (123) has a quadrangular tubular shape. The bottom wall (121) closes an open end of the quadrangular tubular sidewall (123) on the side opposite to the separation direction (E) side (the side closer to the outer wall (28) of the casing (20)).

[0094] The lid (124) has a quadrangular plate shape. The lid (124) closes the open end of the quadrangular tubular sidewall (123) on the separation direction (E) side. A seal member (124a) is interposed between the sidewall (123) and the lid (124).

[0095] A housing space (120a) is formed in a region surrounded by the bottom wall (121), the sidewall (123), and the lid (124) in the terminal box (120) (inside the terminal box (120)). The bottom wall (121), the sidewall (123), and the lid (124) partition the housing space (120a) inside the terminal box (120) from an external space (120b) outside the terminal box (120).

[0096] The housing space (120a) in the terminal box (120) has an internal volume (V). As the internal volume (V) decreases, the amount of air (containing oxygen) present in the housing space (120a) in the terminal box (120) decreases. As the internal volume (V) increases, the amount of air present in the housing space (120a) in the terminal box (120) increases.

[0097] The terminal box (120) houses the terminal rods (100) held by the terminal body (110) in the housing space (120a). Specifically, a portion of terminal rod (100) protruding in the separation direction (E) beyond the lid (113) of the terminal body (110) is housed in the housing space (120a) in the terminal box (120).

[0098] The cable gland (125) is substantially cylindrical. The cable gland (125) passes through a hole (not shown) formed in the sidewall (123). A seal member (not shown) is interposed between the hole in the sidewall (123) and the cable gland (125).

[0099] A power supply cable (not shown) connected to the other ends (102) of the terminal rods (100) housed in the housing space (120a) in the terminal box (120) passes through the cable gland (125) and is connected to an external power source (not shown) disposed in the external space (120b) outside the terminal box (120).

[0100] As illustrated in FIG. 3, the second tubular portion (126) extends from the peripheral edge (122a) of the second hole (122) formed in the bottom wall (121) in the separation direction (E) away from the outer wall (28) of the casing (20). The second tubular portion (126) has a cylindrical shape. The second tubular portion (126) extends straight in the separation direction (E). The second tubular portion (126) extends in the separation direction (E) by the entire length (L0). The second tubular portion (126) is disposed in the housing space (120a) in the terminal box (120).

[0101] The first tubular portion (111) of the terminal body (110) is inserted in the second tubular portion (126) of the terminal box (120). Specifically, the first tubular portion (111) of the terminal body (110) is fitted in the second tubular portion (126) of the terminal box (120).

[0102] The first tubular portion (111) of the terminal body (110) and the second tubular portion (126) of the terminal box (120) are fitted to each other. Specifically, the first tubular portion (111) of the terminal body (110) and the second tubular portion (126) of the terminal box (120) are in a clearance fit relationship.

[0103] In this example, a distal end of the first tubular portion (111) on the separation direction (E) side (the connection portion with the lid portion (113)) of the terminal body (110) slightly protrudes in the separation direction (E) relative to the distal end of the second tubular portion (126) of the terminal box (120) on the separation direction (E) side.

[0104] As illustrated in FIG. 6, a clearance (T) is formed between the outer peripheral surface of the first tubular portion (111) of the terminal body (110) and the inner peripheral surface of the second tubular portion (126) of the terminal box (120). The clearance (T) between the outer peripheral surface of the first tubular portion (111) of the terminal body (110) and the inner peripheral surface of the second tubular portion (126) of the terminal box (120) is set to have a predetermined value or less based on the design criteria of the safety clearance shown later in Table 1.

[0105] The clearance (T) is the sum of a first clearance (T1) at an arbitrary point between the first tubular portion (111) and the second tubular portion (126) and a second clearance (T2) located 180 degrees opposite the first clearance (T1) (at a point rotationally symmetric with respect to the center of each tubular portion).

[0106] The insertion length (L1) of the first tubular portion (111) of the terminal body (110) inserted into the second tubular portion (126) of the terminal box (120) is set to be equal to or greater than a predetermined value based on the design criteria of the safety clearance shown later in Table 1. The insertion length (L1) is the length of the part where the clearance (T) is maintained at or below a predetermined value. The insertion length (L1) is also referred to as a fitting length.

[0107] A corner of a distal end of the first tubular portion (111) on the separation direction (E) side (a connection portion with the lid (113)) of the terminal body (110) is formed into a rounded corner (111a) having an arc shape. At the rounded corner (111a), the clearance (T) between the first tubular portion (111) and the second tubular portion (126) may not be equal to or less than the predetermined value. The insertion length (L1) is preferably set without including the rounded corner (111a).

[0108] In this example, the insertion length (L1) of the first tubular portion (111) of the terminal body (110) inserted into the second tubular portion (126) of the terminal box (120) is shorter than the entire length (L0) by the length excluding the rounded corner (111a).(Safety Clearance)

[0109] If there is an abnormality while the compressor (10) is in operation, a flame (F) may be generated in the housing space (120a) inside the terminal box (120) housing the terminal rods (100). The flame (F) grows in the presence of oxygen. The atmosphere in the external space (120b) outside the terminal box (120) contains a large amount of oxygen, and it is necessary to prevent the flame (F) generated in the housing space (120a) inside the terminal box (120) from exiting to the external space (120b) outside the terminal box (120).

[0110] The flame (F) is generated, for example, as follows. If an abnormality occurs during the operation of the compressor (10) and causes a large current to flow through the terminal rods (100), the insulator (130) between the terminal rods (100) and the terminal body (110) melts, and the terminal rods (100) are detached from the terminal body (110). The terminal rods

[0111] (100) detached from the terminal body (110) may be blown away by the internal pressure of the compressor (10) and come into contact with the metal casing (20). At this time, a spark is generated between the terminal rods (100) and the casing (20).

[0112] If the refrigerant (G) used in the compressor (10) is flammable, the refrigerant (G) that leaks out of the casing (20) through the portion from which the terminal rods (100) are detached (the first hole (29) of the outer wall (28) of the casing (20)) is mixed with the air (containing oxygen) outside the casing (20), generating a flammable atmosphere. If the spark is generated in this state, ignition may be generated outside the casing (20) and cause the flame (F).

[0113] Thus, the terminal box (120) is fixed to the outer wall (28) of the casing (20) to cover the first hole (29) in the outer wall (28) of the casing (20). The flame (F) generated outside the casing (20) is confined in the housing space (120a) inside the terminal box (120) (the flame (F) is generated in the housing space (120a) inside the terminal box (120)).

[0114] As described above, since the atmosphere in the external space (120b) outside the terminal box (120) contains a large amount of oxygen, it is necessary to prevent the flame (F) generated in the housing space (120a) inside the terminal box (120) from exiting into the external space (120b) outside the terminal box (120).

[0115] As illustrated in FIG. 3, the flame (F) generated in the housing space (120a) inside the terminal box (120) inevitably passes through the clearance (T) between the first tubular portion (111) of the terminal body (110) and the second tubular portion (126) of the terminal box (120) to exit into the external space (120b) outside the terminal box (120).

[0116] The idea of safety clearance is to extinguish the flame (F) by cooling and smothering the flame (F) passing through the clearance (T) while the flame (F) is passing through the clearance (T).

[0117] Table 1 shows the design criteria for the safety clearance. [Table 1]Insertion Length (L1) [mm]Maximum Clearance (T) [mm]Internal Volume (V) ≤ 100 [cm 2< ]100 [cm 2< ] < Internal Volume (V) ≤ 500 [cm 2< ]500 [cm 2< ] < Internal Volume (V) ≤ 2000 [cm 2< ]2000 [cm 2< ] < Internal Volume (V)6 < L ≤ 9.50.3---9.5 < L ≤ 12.50.30.30.08-12.5 < L ≤ 250.30.30.30.225 < L0.40.40.40.4

[0118] The safety clearance is the maximum clearance (T) that can extinguish the flame (F) while the flame (F) is passing through the clearance (T). The clearance (T) may be set to the value shown in Table 1 or less.

[0119] The maximum clearance (T) (safety clearance) is determined according to the type of the refrigerant (G), the insertion length (L1), and the internal volume (V). The unit of the maximum clearance (T) (safety clearance) is [mm]. The unit of the insertion length (L1) is [mm]. The unit of the internal volume (V) is [cm 2< ].

[0120] Table 1 shows an example in which the type of refrigerant (G) is propane, but the values can sufficiently be applied to the other types of refrigerant. Propane is highly flammable, and the value of the clearance (T) shown in Table 1 is set to be tight (small). When a refrigerant (G) other than propane is used, the value of the clearance (T) may be set to be less stringent (larger) than the value shown in Table 1.

[0121] As shown in Table 1, the maximum clearance (T) (safety clearance) decreases as the insertion length (L1) decreases, and increases as the insertion length (L1) increases. The maximum clearance (T) (safety clearance) increases as the internal volume (V) decreases, and decreases as the internal volume (V) increases.

[0122] As shown in Table 1, the maximum clearance (T) (safety clearance) between the first tubular portion (111) of the terminal body (110) and the second tubular portion (126) of the terminal box (120) is preferably equal to or less than 0.4 mm.

[0123] As shown in Table 1, the insertion length (L1) of the first tubular portion (111) of the terminal body (110) inserted into the second tubular portion (126) of the terminal box (120) is preferably equal to or greater than 6 mm.(Advantages)

[0124] As illustrated in FIG. 3, in the compressor (10) of the present embodiment, the flame (F) generated in the housing space (120a) inside the terminal box (120) passes through the clearance (T) between the first tubular portion (111) of the terminal body (110) and the second tubular portion (126) of the terminal box (120) to exit into the external space (120b) outside the terminal box (120). The flame (F) is extinguished while passing through the clearance (T).

[0125] The compressor (10) of the present embodiment can prevent the flame (F) generated in the housing space (120a) inside the terminal box (120) from exiting into the external space (120b) outside the terminal box (120).

[0126] Setting the insertion length (L1) of the first tubular portion (111) of the terminal body (110) inserted into the second tubular portion (126) of the terminal box (120) to be equal to or greater than 6 mm is more advantageous in terms of extinguishing the flame (F) while the flame (F) is passing through the clearance (T).

[0127] Setting the maximum clearance (T) (safety clearance) between the first tubular portion (111) of the terminal body (110) and the second tubular portion (126) of the terminal box (120) to be equal to or less than 0.4 mm is more advantageous in extinguishing the flame (F) while the flame (F) is passing through the clearance (T).

[0128] Since the first tubular portion (111) of the terminal body (110) extends straight and has a circular cross section (is cylindrical), and in addition, the second tubular portion (126) of the terminal box (120) extends straight and is cylindrical, insertion of the first tubular portion (111) of the terminal body (110) into the second tubular portion (126) of the terminal box (120) is facilitated.

[0129] The lead wires (73a) as the wires (K) to the electric motor (70) in the casing (20) are connected to the terminal rods (100). A large current is likely to flow through the terminal rods (100) connected to the electric motor (70) via the lead wires (73a). It is beneficial to take measures against the flame (F) that may be generated around the terminal rods (100) where the large current is likely to occur.

[0130] As illustrated in FIG. 5, the outer wall (28) of the casing (20) has an arc shape (the barrel (21) of the casing (20) is cylindrical), and a gap (H) is likely to be formed between the outer wall (28) of the casing (20) and the bottom wall (121) of the terminal box (120). More specifically, a large gap (H) is unavoidably formed between the outer wall (28) and the bottom wall (121).

[0131] It is difficult to keep the gap (H) equal to or less than the safety clearance. If the gap (H) is to be kept equal to or less than the safety clearance, complicated work such as caulking the gap (H) or filling the gap (H) with a seal member is required.

[0132] FIG. 9 is a view corresponding to FIG. 3, according to prior art. In a compressor (10') according to the prior art, a terminal body (110') does not protrude in a direction away from the outer wall (28) of the casing (20). In the prior art compressor (10'), the terminal box (120') is not provided with a second tubular portion (126). In this configuration, the gap (H) between the outer wall (28) of the casing (20) and the bottom wall (121') of the terminal box (120') needs to be equal to or less than the safety clearance. For this purpose, the prior art compressor (10') requires caulking the gap (H) or filling the gap (H) with a seal member to keep the gap (H) equal to or less than the safety clearance.

[0133] In the compressor (10) of the present embodiment, the clearance (T) between the first tubular portion (111) of the terminal body (110) and the second tubular portion (126) of the terminal box (120) is equal to or less than the safety clearance. The compressor (10) of the present embodiment does not require any complicated work on the gap (H) between the outer wall (28) of the casing (20) and the bottom wall (121) of the terminal box (120), such as caulking the gap (H) or filling the gap (H) with a seal member, as in the prior art compressor (10').

[0134] According to the compressor (10) of the present embodiment, the safety clearance can be secured more easily than in the prior art compressor (10').

[0135] According to the compressor (10) of the present embodiment, the advantage of inserting the first tubular portion (111) of the terminal body (110) into the second tubular portion (126) of the terminal box (120) can be more significant because the gap (H) is easily formed between the arc-shaped outer wall (28) of the casing (20) and the bottom wall (121) of the terminal box (120).<Second Embodiment>

[0136] A compressor (10) of a second embodiment will be described below. FIG. 7 is a view corresponding to FIG. 3, according to the second embodiment. In the following description, the same components as those of the above embodiment are denoted by the same reference numerals, and their detailed descriptions may be omitted.

[0137] In the present embodiment, the terminal body (110) has a solid column shape (circular rod shape). The terminal body (110) extends straight. The terminal body (110) has a circular cross section when viewed in the extension direction of the terminal body (110).

[0138] The other configurations are the same as those of the first embodiment.<Third Embodiment>

[0139] A compressor (10) of a third embodiment will be described below. FIG. 8 is a view corresponding to FIG. 3, according to the third embodiment. FIG. 8 is simpler than FIG. 3. In the following description, the same components as those of the above embodiment are denoted by the same reference numerals, and their detailed descriptions may be omitted.

[0140] In the present embodiment, the terminal body (110) is tapered, and has a diameter decreasing as it extends in the separation direction (E). The second tubular portion (126) of the terminal box (120) is tapered, and has a diameter decreasing as it extends in the separation direction (E).

[0141] The other configurations are similar to those of the first embodiment and the second embodiment.<Other Embodiments>

[0142] The value of the maximum clearance (T) (safety clearance) and the value of the insertion length (L1) are not necessarily set according to Table 1. For example, when the refrigerant (G) used is not propane which is highly flammable, these values may be set to be less stringent than the values shown in Table 1. The maximum clearance (T) (safety clearance) may be greater than 0.4 mm. The insertion length (L1) may be less than 6 mm.

[0143] The refrigerant (G) may be other than propane. The refrigerant (G) may be any of highly flammable refrigerants, flammable refrigerants, weak flammable refrigerants, and nonflammable refrigerants. The refrigerant (G) may be other refrigerant than propane (R290), such as ammonia (R717), methane (R50), ethane (R170), butane (R600), isobutane (R600a), R152a, R32, R1234yf, R1234ze, R410A, R134a, and R407C. The refrigerant (G) may be a refrigerant mixture containing two or more of these refrigerants. The refrigerant (G) may be other than those described above.

[0144] In the third embodiment, the terminal body (110) and the second tubular portion (126) of the terminal box (120) may be tapered and may have diameters increasing as they extend in the separation direction (E).

[0145] The second tubular portion (126) of the terminal box (120) may have, for example, a polygonal tubular shape instead of a cylindrical shape. The terminal body (110) may have a polygonal cross section.

[0146] The distal end of the second tubular portion (126) of the terminal box (120) on the separation direction (E) side may protrude relative to the distal end of the terminal body (110) on the separation direction (E) side. Alternatively, both may be flush with each other.

[0147] The outer wall (28) of the casing (20) may have a flat shape, instead of an arc shape.

[0148] In the above embodiments, the first tubular portion (111) of the terminal body (110) and the second tubular portion (126) of the terminal box (120) are in a clearance fit relationship, but it is not limited to this example, and they may be in an interference fit relationship or a transition fit relationship. The clearance (T) may be zero (the clearance (T) is rather preferably zero).

[0149] In the above embodiments, the electric motor (70) is described as an example of the device (J), from which the wires (K) are connected to the terminal rods (100), in the casing (20)), but it is not limited to this example. The device (J) in the casing (20) may be, for example, another device such as a measurement device or a magnetic bearing.

[0150] The compressor (10) may be horizontally placed. The axial direction (Z) of the drive shaft (40) may extend in the horizontal direction.

[0151] The compressor (10) is not limited to a scroll compressor, and may be a rotary compressor, a screw compressor, or a turbo compressor, for example.

[0152] The compressor (10) may not be applied to the refrigeration apparatus (1), and may be used alone, for example.

[0153] While the embodiments have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the claims. The elements according to the embodiments, the variations thereof, and the other embodiments may be combined and replaced with each other.DESCRIPTION OF REFERENCE CHARACTERS

[0154] ESeparation Direction (Direction) KWire VInternal Volume L1Insertion Length TClearance FFlame 1Refrigeration Apparatus 10Compressor 20Casing 21Barrel 28Outer Wall 29First Hole 30Compression Mechanism 40Drive Shaft 50Housing 60Balance Weight 70Electric Motor 73Coil 73aLead Wire 80Lower Bearing Member 90Oil Pump 100Terminal Rod 110Terminal Body 111First Tubular Portion 120Terminal Box 120aHousing Space 120bExternal Space 121Bottom Wall 122Second Hole 122aPeripheral Edge 126Second Tubular Portion

Examples

first embodiment

[0023]A compressor (10) of a first embodiment will be described below. The compressor (10) is applied to a refrigeration apparatus (1). FIG. 1 illustrates the refrigeration apparatus (1). The refrigeration apparatus (1) includes a refrigerant circuit (1a) in which a refrigerant as a working fluid circulates. The refrigerant circuit (1a) of the refrigeration apparatus (1) includes a compressor (10), a condenser (a radiator) (2), a decompression mechanism (an expansion mechanism) (3), and an evaporator (4). The decompression mechanism (3) is, for example, an expansion valve or a capillary tube. The refrigerant circuit (1a) performs a vapor compression refrigeration cycle. The refrigeration apparatus (1) is applied to, for example, an air conditioner and a cooler.

(Compressor)

[0024]FIG. 2 shows the compressor (10) in a front sectional view. In this example, the compressor (10) is a scroll compressor. The compressor (10) includes a casing (20), a compression mechanism (30), a drive shaft...

third embodiment

[0144]In the third embodiment, the terminal body (110) and the second tubular portion (126) of the terminal box (120) may be tapered and may have diameters increasing as they extend in the separation direction (E).

[0145]The second tubular portion (126) of the terminal box (120) may have, for example, a polygonal tubular shape instead of a cylindrical shape. The terminal body (110) may have a polygonal cross section.

[0146]The distal end of the second tubular portion (126) of the terminal box (120) on the separation direction (E) side may protrude relative to the distal end of the terminal body (110) on the separation direction (E) side. Alternatively, both may be flush with each other.

[0147]The outer wall (28) of the casing (20) may have a flat shape, instead of an arc shape.

[0148]In the above embodiments, the first tubular portion (111) of the terminal body (110) and the second tubular portion (126) of the terminal box (120) are in a clearance fit relationship, but it is not limited...

Claims

1. A compressor, comprising: a compression mechanism (30); a casing (20) configured to house the compression mechanism (30); a terminal body (110) fixed to an outer wall (28) of the casing (20) and configured to hold a terminal rod (100) to which a wire (K) to a device (J) in the casing (20) is connected; and a terminal box (120) fixed to the outer wall (28) of the casing (20) and configured to house the terminal rod (100) held by the terminal body (110), wherein the terminal body (110) protrudes in a direction (E) away from the casing (20), the terminal box (120) includes: a bottom wall (121) fixed to the outer wall (28) of the casing (20); a hole (122) formed in the bottom wall (121) and through which the terminal body (110) passes; and a tubular portion (126) extending from a peripheral edge (122a) of the hole (122) in the direction (E) away from the casing (20), and the terminal body (110) is inserted into the tubular portion (126).

2. The compressor of claim 1, wherein an insertion length (L1) of the terminal body (110) inserted into the tubular portion (126) is equal to or greater than 6 mm.

3. The compressor of claim 1 or 2, wherein a clearance (T) between the terminal body (110) and the tubular portion (126) is equal to or less than 0.4 mm.

4. The compressor of any one of claims 1 to 3, wherein the tubular portion (126) has a cylindrical shape extending straight, and the terminal body (110) extends straight and has a circular cross section.

5. The compressor of any one of claims 1 to 4, further comprising: an electric motor (70) configured to drive the compression mechanism (30), wherein the casing (20) is configured to house the compression mechanism (30) and the electric motor (70), and a wire (K) to the electric motor (70) is connected to the terminal rod (100).

6. The compressor of any one of claims 1 to 5, wherein the outer wall (28) has an arc shape.

7. A refrigeration apparatus comprising the compressor (10) of any one of claims 1 to 6.

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