Compressor and refrigeration cycle device

Abstract

To prevent conductive pins from scattering in an emergency, and to allow an operator to perform removal and mounting of a terminal cover easily.SOLUTION: A terminal guard 300 includes a first side wall 321 and a second side wall 322. A terminal cover 400 includes a third side wall 433 and a fourth side wall 434. The first side wall 321 is closer to a terminal 200 than the second side wall 322. The first side wall 321 has a first hole 331 for being engaged with the terminal cover 400. The second side wall 322 includes a second hole 332 for being engaged with the terminal cover 400. The third side wall 433 includes a first protrusion part 441 being engaged with the first hole 331. The fourth side wall 434 includes a second protrusion part 442 being engaged with the second hole 332. First length Ha of the first protrusion part 441 is longer than second length Hb of the second protrusion part 442.SELECTED DRAWING: Figure 5

Description

[Technical Field]

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

[0002] Terminal covers such as those shown in Patent Document 1 (JP 2019-167915 A) are generally made of a material containing glass fiber to prevent the spread of fire. Summary of the Invention [Problem to be solved by the invention]

[0003] Therefore, the terminal cover is very hard and difficult to remove and install. Although such a terminal cover is effective in preventing the conductive pins from flying off in an emergency, it has the problem of making it difficult for workers to remove and install the terminal cover for inspection, etc. [Means for solving the problem]

[0004] A compressor according to a first aspect includes a motor, a compression mechanism, and a casing. The compression mechanism is driven by the motor. The casing houses the compression mechanism therein. The casing has a terminal, a terminal guard, and a terminal cover. The terminal includes a main body and a plurality of conductive pins. The main body penetrates a portion of the casing. The plurality of conductive pins are inserted into the main body. Lead wires extending from the motor are connected to the plurality of conductive pins. The terminal guard has a side wall. The side wall is provided on the outside of the casing so as to surround the terminal in a rectangular shape when viewed along a first direction. The first direction is the direction in which the plurality of conductive pins extend. The terminal cover has an opening. The opening is aligned with the side wall. The terminal cover is attached to cover the terminal. The side wall has a first side wall and a second side wall. The first side wall and the second side wall correspond to two short sides of the side wall when viewed along the first direction. The terminal cover has a third side wall and a fourth side wall. The third side wall is aligned with the first side wall. The fourth side wall is aligned with the second side wall. The first side wall is closer to the terminal than the second side wall. The first side wall has a first hole for engaging with the terminal cover. The second side wall has a second hole for engaging with the terminal cover. The third side wall has a first protrusion. The first protrusion engages with the first hole. The first protrusion protrudes in the longitudinal direction of the side walls when viewed along the first direction. The fourth side wall has a second protrusion. The second protrusion engages with the second hole. The second protrusion protrudes in the longitudinal direction. A first longitudinal length Ha of the first protrusion is longer than a second longitudinal length Hb of the second protrusion.

[0005] In the compressor of the first aspect, the first length Ha of the first protrusion in the longitudinal direction is longer than the second length Hb of the second protrusion in the longitudinal direction. Therefore, the compressor allows the terminal cover to be easily removed and attached to the second side wall farther from the terminal while maintaining a state in which the terminal cover is firmly fixed (high attachment strength) on the first side wall closer to the terminal. As a result, it is possible to prevent the conductive pins from flying off in an emergency and improve the workability when a worker removes and attaches the terminal cover for inspection, etc.

[0006] A compressor according to a second aspect is the compressor according to the first aspect, wherein the plurality of conductive pins are arranged on concentric circles when viewed along a first direction, and a third length La in the longitudinal direction from the third side wall to the center of the concentric circle when viewed along the first direction, a fourth length Lb in the longitudinal direction from the fourth side wall to the center of the concentric circle when viewed along the first direction, the first length Ha, and the second length Hb satisfy Ha / Hb=Lb / La.

[0007] A compressor according to a third aspect is the compressor according to the first or second aspect, wherein the second length Hb is 50% or more and 90% or less of the first length Ha.

[0008] A compressor according to a fourth aspect is the compressor according to any one of the first aspect to the third aspect, wherein the first protrusion and the second protrusion are provided near the opening.

[0009] A compressor according to a fifth aspect is the compressor according to any one of the first aspect to the fourth aspect, wherein the second protrusion is provided closer to the opening than the first protrusion.

[0010] With this configuration, the compressor according to the fifth aspect allows the terminal cover to be more easily removed and attached to the second side wall farther from the terminal.

[0011] A compressor according to a sixth aspect is the compressor according to any one of the first aspect to the fifth aspect, wherein the thickness of the fourth side wall is thinner than the thickness of the third side wall.

[0012] With this configuration, the compressor according to the sixth aspect allows the terminal cover to be more easily removed and attached to the second side wall farther from the terminal.

[0013] A refrigeration cycle device according to a seventh aspect includes a refrigerant circuit having the compressor according to any one of the first to sixth aspects. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a schematic diagram of a refrigeration cycle device. [Figure 2] FIG. 2 is a control block diagram of the refrigeration cycle device. [Figure 3] FIG. 2 is a cross-sectional side view showing a schematic structure of a compressor. [Figure 4] 1 is a diagram showing the general structure of a terminal, a terminal guard, and a terminal cover, with a partial cross-sectional view. [Figure 5] This is a diagram for explaining the first length Ha, the second length Hb, the third length La, and the fourth length Lb using a cross-sectional view of the terminal cover and a view of the terminal and terminal guard from the outside of the casing along the first direction. DETAILED DESCRIPTION OF THE INVENTION

[0015] (1) Overall structure Fig. 1 is a schematic configuration diagram of the refrigeration cycle apparatus 1. Fig. 2 is a control block diagram of the refrigeration cycle apparatus 1. In the refrigeration cycle apparatus 1, a vapor compression refrigeration cycle is performed in a refrigerant circuit 10, in which a refrigerant is compressed, releases heat or condenses, is depressurized, is heated and evaporates, and is then compressed again. The refrigerant may be a single refrigerant such as R32, or a mixed refrigerant such as R454C.

[0016] As shown in FIG. 1, the refrigeration cycle device 1 mainly includes a heat source unit 20 and a utilization unit 30.

[0017] (2) Detailed configuration (2-1) Heat source unit The heat source unit 20 is installed, for example, outdoors or in a machine room. As shown in Fig. 1, the heat source unit 20 mainly has a compressor 100, a flow path switching mechanism 22, a heat source heat exchanger 23, an expansion mechanism 24, a heat source fan 25, and an accumulator 41. The heat source unit 20 also has a first control unit 27 that controls the operation of each part that constitutes the heat source unit 20.

[0018] The compressor 100 is a device that compresses low-pressure refrigerant in a refrigeration cycle drawn in through a suction port, raises the pressure to the high pressure in the refrigeration cycle, and discharges the refrigerant from a discharge port. The compressor 100 is a hermetic compressor in which a positive displacement compression mechanism 130, such as a rotary or scroll type, is driven by a motor 120. The operating frequency of the motor 120 of the compressor 100 can be controlled by an inverter. Details of the compressor 100 will be described later.

[0019] The flow path switching mechanism 22 is a mechanism that switches the flow paths of the refrigerant circuit 10. In this embodiment, the flow path switching mechanism 22 is a four-way switching valve. When the refrigeration cycle apparatus 1 performs cooling operation, the flow path switching mechanism 22 switches the state of the refrigerant circuit 10 to a first state (indicated by the solid line in the flow path switching mechanism 22 in FIG. 1). When the refrigeration cycle apparatus 1 performs heating operation, the flow path switching mechanism 22 switches the state of the refrigerant circuit 10 to a second state (indicated by the dashed line in the flow path switching mechanism 22 in FIG. 1).

[0020] The heat source heat exchanger 23 functions as a radiator or condenser of high-pressure refrigerant in the refrigeration cycle during cooling operation of the refrigeration cycle device 1, and functions as an evaporator of low-pressure refrigerant in the refrigeration cycle during heating operation.

[0021] The expansion mechanism 24 is a mechanism for adjusting the pressure and flow rate of the refrigerant flowing through the refrigerant circuit 10. In this embodiment, the expansion mechanism 24 is an electronic expansion valve whose valve opening degree is adjustable.

[0022] The heat source fan 25 generates an air flow such that air acting as a heat source outside the casing (not shown) of the heat source unit 20 is drawn into the casing and supplied to the heat source heat exchanger 23, and the air that has exchanged heat with the refrigerant in the heat source heat exchanger 23 is discharged to the outside of the casing.

[0023] The accumulator 41 is a refrigerant container that has a gas-liquid separation function and is capable of storing excess refrigerant in the refrigerant circuit 10 as liquid refrigerant.

[0024] The first control unit 27 has a microcomputer including a CPU, memory, etc. The first control unit 27 is connected to a second control unit 34 of the utilization unit 30 (described later) via a communication line, and transmits and receives control signals and the like to and from the second control unit 34.

[0025] (2-2) Usage unit The utilization unit 30 is installed, for example, on the walls, ceiling, floor, etc. of a room that is the target space, or in the attic of the target space. As shown in Fig. 1, the utilization unit 30 mainly has a utilization heat exchanger 31 and a utilization fan 32. The utilization unit 30 also has a second control unit 34 that controls the operation of each part that constitutes the utilization unit 30.

[0026] The utilization heat exchanger 31 functions as an evaporator of low-pressure refrigerant in the refrigeration cycle during cooling operation of the refrigeration cycle device 1, and functions as a radiator or condenser of high-pressure refrigerant in the refrigeration cycle during heating operation.

[0027] The utilization fan 32 generates an air flow such that air from the space to be air-conditioned is drawn into the inside of a casing (not shown) of the utilization unit 30 and supplied to the utilization heat exchanger 31, and the air that has exchanged heat with the refrigerant in the utilization heat exchanger 31 is blown out to the outside of the casing.

[0028] The second control unit 34 has a microcomputer including a CPU, memory, etc. The second control unit 34 is connected to the first control unit 27 of the heat source unit 20 via a communication line, and transmits and receives control signals and the like to and from the first control unit 27.

[0029] (3) Compressor FIG. 3 is a side cross-sectional view showing the schematic structure of the compressor 100. FIG. 4 is a diagram showing the schematic structures of the terminal 200, the terminal guard 300, and the terminal cover 400, partially in cross section. FIG. 5 is a diagram for explaining the first length Ha, the second length Hb, the third length La, and the fourth length Lb using a cross-sectional view of the terminal cover 400 and a view of the terminal 200 and the terminal guard 300 viewed from the outside of the casing 110 along the first direction D1. As shown in FIG. 3, the compressor 100 of this embodiment is a single-cylinder rotary compressor. However, the type of the compressor 100 is not limited thereto and may be, for example, a two-cylinder rotary compressor, a scroll compressor, or a screw compressor.

[0030] The compressor 100 mainly includes a casing 110, a motor 120, a compression mechanism 130, and a shaft 140. The casing 110 includes a terminal 200, a terminal guard 300, and a terminal cover 400.

[0031] (3-1) Casing Casing 110 is a vertical cylindrical container. As shown in Fig. 3, casing 110 has a cylindrical member 112 that is open at the top and bottom, and a bowl-shaped upper lid 114a and a lower lid 114b that are provided at the upper and lower ends, respectively, of cylindrical member 112. Cylindrical member 112, upper lid 114a, and lower lid 114b are fixed by welding to maintain airtightness.

[0032] Cylindrical member 112 is provided with a suction pipe connection portion 116, into which a suction pipe 42a is inserted. Suction pipe 42a inserted into suction pipe connection portion 116 is connected to compression mechanism 130. Upper lid 114a is provided with a discharge pipe connection portion 118, to which a discharge pipe 42b is connected. High-pressure refrigerant compressed by compression mechanism 130 is discharged through discharge pipe connection portion 118 to discharge pipe 42b.

[0033] The casing 110 accommodates therein a motor 120, a compression mechanism 130, and a shaft 140. A terminal 200 is attached to an upper cover 114a of the casing 110.

[0034] (3-2) Motor 3, the motor 120 drives the compression mechanism 130 via a shaft 140. The motor 120 is disposed above the compression mechanism 130. The motor 120 mainly includes a stator 122 and a rotor 124.

[0035] The stator 122 mainly includes an annular stator core 122a, a winding 122b wound around the stator core 122a, and insulators 122c disposed above the upper end surface and below the lower end surface of the stator core 122a. The stator core 122a is fixed to the cylindrical member 112 of the casing 110. The insulators 122c are disposed adjacent to the stator core 122a, above and below the inner periphery of the annular stator core 122a. The winding 122b is wound around the stator core 122a via the insulators 122c. As shown in FIG. 4, the winding 122b is connected to a terminal 200 attached to the casing 110 via a lead wire 160. Power is supplied to the winding 122b from an external power source via the terminal 200 and the lead wire 160. When a current is passed through the windings 122b wound around the stator core 122a via the lead wires 160, a magnetic field is generated in the stator 122 to rotate the rotor .

[0036] The rotor 124 is a cylindrical member. The rotor 124 is formed by laminating a plurality of annular electromagnetic steel plates. A shaft 140 is inserted into and fixed in a hollow portion of the rotor 124. The shaft 140 has an eccentric portion 142. The shaft 140 is connected to a roller 136a of a piston 136 of the compression mechanism 130 at the eccentric portion 142.

[0037] When a current is supplied to the motor 120 and a current flows through the windings 122b, a rotating magnetic field is generated in the stator 122, causing the rotor 124 to rotate. When the rotor 124 rotates, the shaft 140 connected to the rotor 124 also rotates, and a driving force is applied to the compression mechanism 130 via the shaft 140.

[0038] (3-3) Compression mechanism As shown in Fig. 3, compression mechanism 130 is a mechanism that compresses the refrigerant drawn through suction pipe 42a. Compression mechanism 130 is driven by motor 120 via a shaft 140 fixed to motor 120. Compression mechanism 130 is housed below motor 120 on the lower side of casing 110. Rotary type compression mechanism 130 mainly has a front head 132, a cylinder 134, a piston 136, and a rear head 138.

[0039] The cylinder 134 has a cylindrical portion 134a with open upper and lower end faces, and an extending portion 134b extending outward (toward the casing 110) from the cylindrical portion 134a in a plan view. A piston 136 for compressing the refrigerant is housed in a columnar space surrounded by the inner circumferential surface of the cylindrical portion 134a. A suction hole 134ba is formed in the extending portion 134b, through which low-pressure refrigerant in the refrigeration cycle is drawn. The tip of the suction pipe 42a is inserted into the suction hole 134ba through an opening of the suction hole 134ba formed in the outer circumferential surface of the extending portion 134b. A front head 132 is disposed above the cylinder 134 so as to close the upper opening of the cylindrical portion 134a. A rear head 138 is disposed below the cylinder 134 so as to close the lower opening of the cylindrical portion 134a. A cylinder chamber is formed by the inner peripheral surface of cylindrical portion 134a of cylinder 134, the lower surface of front head 132, and the upper surface of rear head 138. A piston 136 is disposed in the cylinder chamber. A compression chamber S1 in which the refrigerant is compressed is formed by the inner peripheral surface of cylindrical portion 134a of cylinder 134, the lower surface of front head 132, the upper surface of rear head 138, and the outer peripheral surface of piston 136 disposed in the cylinder chamber.

[0040] The front head 132 has a front head disk portion 132a that closes the upper opening of the cylindrical portion 134a of the cylinder 134, and an upper bearing portion 132b that extends upward from the center of the front head disk portion 132a. The upper bearing portion 132b is cylindrical and functions as a bearing for the shaft 140.

[0041] The rear head 138 has a rear head disc portion 138a that closes the lower opening of the cylindrical portion 134a of the cylinder 134, and a lower bearing portion 138b that extends downward from the center of the rear head disc portion 138a. The lower bearing portion 138b is cylindrical and functions as a bearing for the shaft 140.

[0042] The piston 136 is a member formed by integrating a cylindrical roller 136a and a plate-shaped blade extending radially from the outer surface of the roller 136a. An eccentric portion 142 of a shaft 140 is fitted into the hollow portion of the roller 136a. The blade of the piston 136 is disposed in a blade pivoting space formed in the cylinder 134 and is pivotally supported by the cylinder 134 via a bushing disposed in the blade pivoting space. During operation of the compressor 100, the blade pivots relative to the cylinder 134 and repeatedly moves in and out of the blade pivoting space.

[0043] The roller 136a and blade of the piston 136 divide the cylinder chamber and form a compression chamber S1 whose volume changes with the revolution of the piston 136. When the shaft 140 rotates, the roller 136a revolves relative to the cylinder 134. Accordingly, the volume of the compression chamber S1 changes, and the low-pressure refrigerant sucked from the suction pipe 42a is compressed to become high-pressure refrigerant, which is then discharged from the discharge hole into the muffler space S2.

[0044] (3-4) Terminal 4 and 5, the terminal 200 is attached to the upper cover 114a of the casing 110. The terminal 200 mainly has a main body 210, three terminal pins 220 (plurality of conductive pins), and a terminal board 230 provided on each terminal pin 220.

[0045] The main body 210 is a member that supports the terminal pin 220. The main body 210 is a generally hat-shaped member. The main body 210 has a cylindrical side wall 212 and a disk 214 that closes one end of the side wall 212. The other end of the side wall 212 (the side where the disk 214 is not present) is open. The terminal 200 is attached to the casing 110 so that the side of the main body 210 where the disk 214 is present is located outside the casing 110, and the open side of the main body 210 is located inside the casing 110. In other words, the main body 210 penetrates a portion of the casing 110.

[0046] The terminal pins 220 are cylindrical members. The terminal pins 220 extend through holes 214a formed in the disc 214 of the main body 210. In other words, the three terminal pins 220 are inserted into the main body 210. The three terminal pins 220 extend parallel to each other along the first direction D1. The three terminal pins 220 are arranged on a concentric circle C1 when viewed along the first direction D1.

[0047] A terminal board 230 is fixed to the end of each terminal pin 220 on the inner side of the casing 110 (the side where the side wall 212 of the main body 210 is open). A lead wire 160 is connected to each terminal board 230 to connect the winding 122b of the stator 122 of the motor 120 to the terminal 200. In other words, the lead wires 160 extending from the motor 120 are connected to the three terminal pins 220 via the terminal boards 230.

[0048] The main body 210 and the terminal pin 220 are fixed together by a sealing member 240 so as to hermetically seal the gap between the main body 210 and the terminal pin 220. The fixing adhesive used as the sealing member 240 is an insulating material.

[0049] (3-5) Terminal guard As shown in FIGS. 4 and 5, the terminal guard 300 mainly includes a bottom plate 310 and a side wall 320. As shown in FIG.

[0050] The bottom plate 310 has a through hole through which the main body 210 is inserted.

[0051] The side wall 320 is provided on the outside of the casing 110 so as to surround the terminal 200 in a rectangular shape when viewed along the first direction D1.

[0052] The side wall 320 has a first side wall 321 and a second side wall 322. The first side wall 321 and the second side wall 322 correspond to the two short sides of the side wall 320 when viewed along the first direction D1. The first side wall 321 is closer to the terminal 200 than the second side wall 322. The first side wall 321 has a first hole 331 for engaging with the terminal cover 400. The second side wall 322 has a second hole 332 for engaging with the terminal cover 400.

[0053] (3-6) Terminal cover 4 and 5, the terminal cover 400 is attached to cover the terminal 200. The terminal cover 400 is made of NYLON66 containing glass fiber, PBT resin containing glass fiber, or the like. The terminal cover 400 has a top plate 410 and an opening 420.

[0054] The opening 420 is aligned with the side wall 320. The opening 420 is formed by the side wall 430. The side wall 430 has a third side wall 433 and a fourth side wall 434. The third side wall 433 is aligned with the first side wall 321. The third side wall 433 has a first protrusion 441 on the inner side of the side wall 430. The first protrusion 441 protrudes toward the longitudinal direction D2 of the side wall 320 when viewed along the first direction D1. The first protrusion 441 engages with the first hole 331 from the outer side to the inner side of the side wall 320. The fourth side wall 434 is aligned with the second side wall 322. The fourth side wall 434 has a second protrusion 442 on the inner side of the side wall 430. The second protrusion 442 protrudes toward the longitudinal direction D2. The second protrusion 442 engages with the second hole 332 from the outside toward the inside of the side wall 320. In this embodiment, the thickness of the third side wall 433 and the thickness of the fourth side wall 434 are approximately the same.

[0055] The first protrusion 441 and the second protrusion 442 are provided near the opening 420. In this embodiment, the length from the first protrusion 441 to the opening 420 in the first direction D1 and the length from the second protrusion 442 to the opening 420 in the first direction D1 are approximately the same.

[0056] A first length Ha of the first protrusion 441 in the longitudinal direction D2 is longer than a second length Hb of the second protrusion 442 in the longitudinal direction D2. The second length Hb is preferably 50% to 90% of the first length Ha. A third length La in the longitudinal direction D2 from the third side wall 433 to the center 92 of the concentric circle C1 when viewed along the first direction D1, a fourth length Lb in the longitudinal direction D2 from the fourth side wall 434 to the center 92 of the concentric circle C1 when viewed along the first direction D1, the first length Ha, and the second length Hb satisfy Ha / Hb=Lb / La.

[0057] (4) Compressor operation In the compressor 100, when the motor 120 is operated and the shaft 140 rotates, the rotation of the shaft 140 causes the roller 136a of the piston 136 of the compression mechanism 130 to revolve. As the roller 136a revolves, the volume of the compression chamber S1, which is connected to the suction pipe 42a, gradually increases, and low-pressure refrigerant is drawn from the suction pipe 42a into the compression chamber S1. As the roller 136a of the piston 136 further revolves, the communication between the compression chamber S1 and the suction pipe 42a is terminated, and the refrigerant begins to be compressed in the compression chamber S1, which is now connected to the discharge hole. Thereafter, the volume of the compression chamber S1, which is now connected to the discharge hole, gradually decreases, and the refrigerant pressure increases. The refrigerant, which becomes high-pressure as the volume of the compression chamber S1 decreases, pushes open a discharge valve provided in the discharge hole and is discharged from the discharge hole into the muffler space S2. The refrigerant that flows into the muffler space S2 flows from the muffler discharge hole into the space above the compression mechanism 130. The refrigerant that flows into the space above the compression mechanism 130 passes through the gap between the stator 122 and rotor 124 of the motor 120, cools the motor 120, and is then discharged into the discharge pipe 42b via the discharge pipe connection part 118.

[0058] (4) Features (4-1) Conventionally, terminal covers such as those shown in Patent Document 1 (JP 2019-167915 A) are generally made of a material containing glass fiber to prevent the spread of fire.

[0059] Therefore, the terminal cover is very hard and difficult to remove and install. Although such a terminal cover is effective in preventing the conductive pins from flying off in an emergency, it has the problem of making it difficult for workers to remove and install the terminal cover for inspection, etc.

[0060] The compressor 100 of this embodiment includes a motor 120, a compression mechanism 130, and a casing 110. The compression mechanism 130 is driven by the motor 120. The casing 110 houses the compression mechanism 130 therein. The casing 110 includes a terminal 200, a terminal guard 300, and a terminal cover 400. The terminal 200 includes a main body 210 and three terminal pins 220 (multiple conductive pins). The main body 210 penetrates a portion of the casing 110. The three terminal pins 220 (multiple conductive pins) are inserted into the main body 210. Lead wires 160 extending from the motor 120 are connected to the three terminal pins 220 (multiple conductive pins). The terminal guard 300 has a side wall 320. The side wall 320 is provided on the outside of the casing 110 so as to surround the terminal 200 in a rectangular shape when viewed in the first direction D1. The first direction D1 is the direction in which the three terminal pins 220 (multiple conductive pins) extend. The terminal cover 400 has an opening 420. The opening 420 is aligned with the side wall 320. The terminal cover 400 is attached to cover the terminal 200. The side wall 320 has a first side wall 321 and a second side wall 322. The first side wall 321 and the second side wall 322 correspond to the two short sides of the side wall 320 when viewed in the first direction D1. The terminal cover 400 has a third side wall 433 and a fourth side wall 434. The third side wall 433 is aligned with the first side wall 321. The fourth side wall 434 is aligned with the second side wall 322. The first side wall 321 is closer to the terminal 200 than the second side wall 322. The first side wall 321 has a first hole 331 for engaging with the terminal cover 400. The second side wall 322 has a second hole 332 for engaging with the terminal cover 400. The third side wall 433 has a first protrusion 441. The first protrusion 441 engages with the first hole 331. The first protrusion 441 protrudes toward the longitudinal direction D2 of the side wall 320 when viewed along the first direction D1. The fourth side wall 434 has a second protrusion 442. The second protrusion 442 engages with the second hole 332. The second protrusion 442 protrudes toward the longitudinal direction D2. A first length Ha of the first protrusion 441 in the longitudinal direction D2 is longer than a second length Hb of the second protrusion 442 in the longitudinal direction D2.

[0061] In the compressor 100 of this embodiment, the first length Ha of the first protrusion 441 in the longitudinal direction D2 is longer than the second length Hb of the second protrusion 442 in the longitudinal direction D2. Therefore, in the compressor 100, the terminal cover 400 can be easily removed and attached to the second side wall 322 farther from the terminal 200 while maintaining a state in which the terminal cover 400 is firmly fixed (a state in which the attachment strength is high) to the first side wall 321 close to the terminal 200. As a result, the compressor 100 can prevent the terminal pins 220 (conductive pins) from flying off in an emergency and can improve the workability when an operator removes and attaches the terminal cover 400 for inspection, etc.

[0062] (4-2) In the compressor 100 of this embodiment, three terminal pins 220 (plurality of conductive pins) are arranged on a concentric circle C1 when viewed along the first direction D1. A third length La in the longitudinal direction D2 from the third side wall 433 to the center 92 of the concentric circle C1 when viewed along the first direction D1, a fourth length Lb in the longitudinal direction D2 from the fourth side wall 434 to the center 92 of the concentric circle C1 when viewed along the first direction D1, the first length Ha, and the second length Hb satisfy Ha / Hb=Lb / La.

[0063] (4-3) In the compressor 100 of this embodiment, the second length Hb is equal to or greater than 50% and equal to or less than 90% of the first length Ha.

[0064] (4-4) In the compressor 100 of this embodiment, the first protrusion 441 and the second protrusion 442 are provided near the opening 420.

[0065] (4-5) The refrigeration cycle device 1 of this embodiment includes a refrigerant circuit 10. The refrigerant circuit 10 has a compressor 100.

[0066] (5) Variations (5-1) Variation 1A In the present embodiment, the length from the first protrusion 441 to the opening 420 in the first direction D1 is approximately the same as the length from the second protrusion 442 to the opening 420 in the first direction D1. However, the second protrusion 442 may be provided closer to the opening 420 than the first protrusion 441.

[0067] As a result, the terminal cover 400 of the compressor 100 can be more easily removed and attached to the second side wall farther from the terminal 200.

[0068] (5-2) Variation 1B In this embodiment, the thickness of the third side wall 433 is approximately the same as the thickness of the fourth side wall 434. However, the thickness of the fourth side wall 434 may be thinner than the thickness of the third side wall 433.

[0069] As a result, the terminal cover 400 of the compressor 100 can be more easily removed and attached to the second side wall farther from the terminal 200.

[0070] (5-3) Variation 1C In this embodiment, the third side wall 433 and the fourth side wall 434 have a first protrusion 441 and a second protrusion 442, respectively, on the inside of the side wall 430. The first protrusion 441 and the second protrusion 442 engage with the first hole 331 and the second hole 332, respectively, from the outside to the inside of the side wall 320.

[0071] However, the third side wall 433 and the fourth side wall 434 may have a first protrusion 441 and a second protrusion 442, respectively, on the outer side of the side wall 430. In this case, the first protrusion 441 and the second protrusion 442 engage with the first hole 331 and the second hole 332, respectively, from the inner side to the outer side of the side wall 320.

[0072] (5-4) Although the embodiments of the present disclosure 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 present disclosure as defined in the claims. [Explanation of symbols]

[0073] 1 Refrigeration cycle device 10 Refrigerant circuit 92 Center of concentric circles 100 Compressor 110 Casing 120 motor 130 Compression Mechanism 160 lead wire 200 Terminal 210 Main body 220 Terminal pin (conductive pin) 300 Terminal Guard 320 side wall 321 First side wall 322 Second side wall 331 Hole 1 332 2nd hole 400 Terminal Cover 420 Opening 433 Third Side Wall 434 4th Side Wall 441 1st protrusion 442 Second protrusion C1 Concentric circles D1 1st direction D2 Longitudinal direction [Prior art documents] [Patent documents]

[0074] [Patent Document 1] Japanese Patent Application Publication No. 2019-167915

Claims

1. a motor (120); a compression mechanism (130) driven by the motor; a casing (110) that houses the compression mechanism therein; Equipped with The casing comprises: a main body portion (210) that penetrates a portion of the casing; a plurality of conductive pins (220) that are inserted through the main body and to which lead wires (160) extending from the motor are connected; a terminal (200) including: a terminal guard (300) having a side wall (320) on the outside of the casing so as to surround the terminal in a rectangular shape when viewed along a first direction (D1) which is the direction in which the plurality of conductive pins extend; a terminal cover (400) having an opening (420) along the side wall and attached to cover the terminal; and The side wall has a first side wall (321) and a second side wall (322) corresponding to two short sides of the side wall when viewed along the first direction, The terminal cover has a third side wall (433) along the first side wall and a fourth side wall (434) along the second side wall, the first side wall is closer to the terminal than the second side wall; The first side wall has a first hole (331) for engaging with the terminal cover, and the second side wall has a second hole (332) for engaging with the terminal cover; the third side wall has a first protrusion (441) protruding in a longitudinal direction (D2) of the side wall when viewed along the first direction for engaging with the first hole, and the fourth side wall has a second protrusion (442) protruding in the longitudinal direction for engaging with the second hole; a first length Ha of the first protrusion in the longitudinal direction is longer than a second length Hb of the second protrusion in the longitudinal direction; A compressor (100).

2. the plurality of conductive pins are arranged on concentric circles (C1) when viewed along the first direction; a third length La in the longitudinal direction from the third side wall to the center (92) of the concentric circle when viewed along the first direction, a fourth length Lb in the longitudinal direction from the fourth side wall to the center of the concentric circle when viewed along the first direction, the first length Ha, and the second length Hb satisfy Ha / Hb=Lb / La. The compressor (100) of claim 1.

3. The second length Hb is equal to or greater than 50% and equal to or less than 90% of the first length Ha. The compressor (100) of claim 1 or 2.

4. the first protrusion and the second protrusion are provided near the opening; The compressor (100) of claim 1 or 2.

5. The second protrusion is provided closer to the opening than the first protrusion. The compressor (100) of claim 1 or 2.

6. The thickness of the fourth side wall is thinner than the thickness of the third side wall. The compressor (100) of claim 1 or 2.

7. A refrigerant circuit (10) comprising a compressor according to claim 1 or 2. Equipped with Refrigeration cycle device (1).

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