JP2015218613A - Hermetic type compressor and refrigeration cycle device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate work for caulking and fixing a lead wire to a pressure-welding terminal, and to make the lead wire which is caulked and fixed less likely to come off, in the case where a plurality of lead wires connected to a plurality of sealed terminals are connected to a coil of each phase of a three-phase motor by using a pressure-welding terminal.SOLUTION: In a hermetic type compressor, a compression mechanism part and a three-phase motor are stored in a sealed case, and a plurality of sealed terminals for supplying power to the three-phase motor are provided in the sealed case, and a plurality of lead wires 16a, 16b connected to each sealed terminal are connected to a coil of each phase of the three-phase motor by using a pressure-welding terminal 19. Out of the lead wires 16a, 16b connected to each sealed terminal, end parts of the plurality of lead wires 16a, 16b connected to the coil of the same phase are crimped by a pressure-welding terminal 18, and the pressure-welding terminal 18 is caulked and fixed to the pressure-welding terminal 19.

Description

  Embodiments described herein relate generally to a hermetic compressor and a refrigeration cycle apparatus.

  In a hermetic compressor, a compression mechanism and a three-phase motor that is a drive unit that drives the compression mechanism are accommodated in a hermetic case. And the sealing terminal for supplying electric power from a power supply device to a three-phase motor is provided in the sealing case, and the sealing terminal and the winding of each phase of a three-phase motor are connected by the lead wire.

  Since the current capacity that can be energized is limited depending on the size of the sealed terminal, when the current supplied to the three-phase motor is increased by increasing the size and performance of the hermetic compressor, a plurality of Sealing terminals are provided to reduce the current supplied to each sealing terminal (see Patent Document 1 below).

  When a plurality of sealed terminals are provided, it is necessary to connect the lead wire connected to each sealed terminal to the winding of each phase of the three-phase motor. For example, when two sealing terminals are provided, two lead wires connected to one sealing terminal and one lead wire connected to the other sealing terminal are combined. It is necessary to connect the lead wire to the winding of each phase of the three-phase motor.

  When the lead wire and the winding are connected using the press contact type terminal, the two lead wires are caulked and fixed to the press contact type terminal.

JP 2012-8276A

  However, when the two lead wires are caulked and fixed to the pressure contact type terminal, the two lead wires are caulked while being held so that the caulking fixing force acts evenly on the two lead wires. It must be fixed, and it takes time and effort. In addition, if the caulking fixing force does not act evenly on the two lead wires when caulking is fixed, and the caulking fixing force that acts on the lead wire after caulking is fixed is smaller, Lead wire may come off the caulking fixed part.

  The object of the embodiment of the present invention is to press the lead wire when the lead wire connected to the plurality of sealed terminals is connected to the winding of each phase of the three-phase motor using the press contact terminal. Provided are a hermetic compressor that can easily perform caulking and fixing to a shaped terminal, and can prevent the caulked and fixed lead wire from coming off the press contact terminal, and a refrigeration cycle apparatus including the hermetic compressor It is to be.

  In the hermetic compressor according to the embodiment, the compression mechanism unit and the three-phase motor that drives the compression mechanism unit are accommodated in the sealed case, and a plurality of sealed terminals for supplying power to the three-phase motor are provided in the sealed case. In a hermetic compressor, wherein a plurality of lead wires connected to each sealed terminal are connected to the windings of each phase of a three-phase motor using a pressure contact terminal, the lead wires connected to each sealed terminal The ends of a plurality of lead wires connected to the same phase winding are crimped by crimp-type terminals, and the crimp-type terminals are caulked and fixed to the press-contact terminals.

It is a whole lineblock diagram of the refrigerating cycle device in a 1st embodiment. It is a bottom view inside a sealed case. It is a top view of a stator. It is a circuit diagram which shows the connection structure of the winding and lead wire of a three-phase structure. It is a front view which decomposes | disassembles and shows the structure of the part which connects two lead wires to a coil | winding. It is a front view which shows the connection part of two lead wires and a coil | winding. It is a front view which shows the crimp-type terminal before caulking and fixing two lead wires in 2nd Embodiment. It is a front view which shows the connection part of two lead wires and a coil | winding.

(First embodiment)
1st Embodiment is described based on FIG. 1 thru | or FIG. FIG. 1 shows the overall configuration of a refrigeration cycle apparatus 1. The refrigeration cycle apparatus 1 includes a compressor body 2 and an accumulator 3, and includes a hermetic compressor 4 that compresses a gas refrigerant, and a compressor body. 2, a condenser 5 that condenses the high-pressure gas refrigerant discharged from the compressor body 2 to form a liquid refrigerant, an expansion device 6 that is connected to the condenser 5 to decompress the liquid refrigerant, and an expansion device 6. And an accumulator 3, and an evaporator 7 for evaporating the liquid refrigerant. The accumulator 3 and the compressor body 2 are connected by a suction pipe 8 through which a gas refrigerant flows.

  The compressor body 2 has a sealed case 9 formed in a cylindrical shape. In the sealed case 9, a compression mechanism unit 10 located on the lower side and a compression mechanism unit 10 located on the upper side are driven. A three-phase motor 11 is accommodated. The three-phase motor 11 is, for example, a three-phase brushless motor. The three-phase motor 11 has a rotary shaft 12 having a vertical center line, and the compression mechanism unit 10 is connected to the rotary shaft 12.

  The compression mechanism unit 10 is a part that compresses the gas refrigerant, and includes a compression element (not shown) that compresses the gas refrigerant sucked from the accumulator 3 through the suction pipe 8. The compression element includes a cylinder having a cylinder chamber into which a gas refrigerant flows, a rotating shaft 12 inserted into the cylinder chamber, a roller fixed to the eccentric portion of the rotating shaft 12 and rotating eccentrically in the cylinder chamber, and a tip portion at the outer periphery of the roller. The cylinder chamber is constituted by a blade or the like that divides the cylinder chamber into a suction chamber and a compression chamber by reciprocating and sliding on the surface. The gas refrigerant compressed to a high pressure is discharged into the sealed case 9 from the compression chamber.

  The three-phase motor 11 includes a rotor 13 that is fixed to the rotary shaft 12 and a stator 14 that is fixed to the inner surface of the sealed case 9 and disposed at a position that surrounds the rotor 13. The stator 14 is wound with a three-phase winding as will be described later.

  The sealed case 9 is provided with two sealed terminals 15 a and 15 b for supplying power to the three-phase motor 11.

  FIG. 2 is a bottom view of the inside of the sealed case 9. As described above, two sealed terminals 15a and 15b are attached to the sealed case 9, three lead wires 16a are connected to one sealed terminal 15a, and three lead wires are connected to the other sealed terminal 15b. 16b is connected.

  FIG. 3 is a top view of the stator 14. Three-phase structure windings 17U, 17V, and 17W are wound around the stator 14, and two lead wires 16a and 16b are connected to the windings 17U, 17V, and 17W of the respective phases. Connection between the windings 17U, 17V, and 17W of each phase and the lead wires 16a and 16b is performed using a wiring receiver 21 described later. In addition, about the code | symbol of winding 17U, 17V, and 17W, it displays with the winding 17 as needed.

  FIG. 4 is a circuit diagram showing a connection structure between the windings 17U, 17V, and 17W having a three-phase structure and the lead wires 16a and 16b. Two lead wires 16a and 16b are connected to the windings 17U, 17V and 17W of each phase, respectively.

  FIG. 5 shows that each of the three lead wires 16a and 16b connected to the respective sealed terminals 15a and 15b is connected to one of the lead wires 16a and 16b connected to the winding 17 of the same phase for each phase. It is a front view which decomposes | disassembles and shows the structure of the part connected to the coil | winding 17 of FIG. For this connection, a crimp-type terminal 18, a first press-contact terminal 19, a second press-contact terminal 20, and a wiring receiver 21 are used.

  The crimp-type terminal 18 is a member for caulking and fixing the two lead wires 16a and 16b connected to the winding 17 of the same phase. The shape before the caulking and fixing of the lead wires 16a and 16b is a rectangular flat plate. It is formed in a shape. The ends of the two lead wires 16a and 16b are placed on the crimp-type terminal 18, and the crimp-type terminal 18 is rounded and tightened so as to surround the ends of the lead wires 16a and 16b. Lead wires 16a and 16b are fixed by caulking. The crimp-type terminal 18 is formed using phosphor bronze or a Corson alloy, which is a material that is unlikely to undergo creep deformation and can maintain a caulking and holding force over a long period of time.

  The first press-contact terminal 19 is a member that crimps and fixes the crimp-type terminal 18 and press-holds the second press-contact terminal 20. The first press-contact terminal 19 is used to crimp and fix the crimp-type terminal 18. Caulking projections 19a and 19b and a holding portion 19c for pressing and holding the second press-contact terminal 20 are provided. A crimp-type terminal 18 having two lead wires 16a and 16b fixed by caulking is placed on the first press-contact terminal 19, and the caulking projections 19a and 19b are rounded and tightened so as to surround the crimp-type terminal 18. As a result, the first press contact type terminal 19 is caulked and fixed. The first press-contact terminal 19 is formed using phosphor bronze or a Corson alloy, which is a material that is unlikely to undergo creep deformation and can maintain a caulking and holding force over a long period of time.

  The second press contact type terminal 20 is a member for connecting both ends of the winding 17 of the same phase. The second press contact type terminal 20 is connected to the first press contact type terminal 19 by being inserted into the holding portion 19 c of the first press contact type terminal 19.

  The wiring receiver 21 is a member for connecting both ends of the winding 17 of the same phase, and is fixed to the end face side of the stator 14 for each winding 17 as shown in FIG. The wiring receiver 21 is provided with a pair of wiring insertion portions 21a into which both ends of the windings 17 of the same phase are inserted, and a terminal insertion portion 21b into which the second press-contact terminal 20 is inserted. After inserting both ends of the winding wire 17 into the wiring insertion portion 21a, the second pressure contact type terminal 20 is inserted into the terminal insertion portion 21b, so that the coating of the winding wire 17 inserted into the wiring insertion portion 21a becomes the second pressure welding. The both ends of the winding 17 are connected via the second press contact type terminal 20.

  FIG. 6 is a front view showing a connection portion between the two lead wires 16a and 16b and the winding 17 of each phase. Both ends of the winding 17 of each phase are inserted into the wiring insertion portion 21a of the wiring receiver 21, and the second press-contact terminal 20 is inserted into the terminal insertion portion (not shown) of the wiring receiver 21, and this second press-contact terminal. 20 is inserted into the holding portion 19 c of the first press-contact terminal 19. The ends of the two lead wires 16a and 16b are caulked and fixed by a crimp-type terminal 18, and the crimp-type terminal 18 is caulked and fixed to the first press-contact terminal 19 by using caulking projections 19a and 19b.

  In such a configuration, in the hermetic compressor 4, when the three-phase motor 11 is energized, the rotation shaft 12 rotates around the center line, and the rotation of the rotation shaft 12 drives the compression mechanism unit 10. The gas refrigerant is compressed in the compression mechanism unit 10.

  The compressed gas refrigerant is discharged from the compression chamber in the compression mechanism unit 10 into the sealed case 9. The high-pressure gas refrigerant discharged into the sealed case 9 is circulated again through the condenser 5, the expansion device 6, and the evaporator 7 to the compression mechanism unit 10 in this order, whereby a refrigeration cycle is executed.

  Here, in this hermetic compressor 4, two sealed terminals 15 a and 15 b are provided in relation to a current capacity that can be energized, and one sealed terminal 15 a is provided for each phase winding 17 of the three-phase motor 11. Two lead wires 16a and 16b of the lead wire 16a connected and the lead wire 16b connected to the other sealing terminal 15b are connected to the first press contact type terminal 19, the second press contact type terminal 20, and the wiring receiver. 21 is connected.

  The ends of the two lead wires 16a and 16b are caulked and fixed by a crimping type terminal 18, and the crimping type terminal 18 is caulked and fixed to the first press contact type terminal 19 by using caulking projections 19a and 19b. .

  In this way, since the two lead wires 16a and 16b are caulked and fixed by the crimp-type terminal 18 and integrated, the two lead wires 16a and 16b are connected to the first pressure contact type terminal 19. In this case, the connection can be easily made without taking time and effort as in the case of connecting one lead wire. Further, since the two lead wires 16a, 16b are caulked and fixed by the crimp-type terminal 18, they are integrated so that when the stress is applied to the lead wires 16a, 16b, the caulking fixing force acting is exerted. Occurrence of a situation in which the smaller lead wires 16a and 16b are detached from the caulking and fixing portions can be prevented, and the highly reliable hermetic compressor 4 can be provided.

  Further, the crimp-type terminal 18 and the first pressure-contact type terminal 19 are formed using phosphor bronze or a Corson alloy, which is a material that is unlikely to undergo creep deformation and can maintain the caulking and holding force for a long period of time. Therefore, even when the temperature rise and fall of the crimp-type terminal 18 and the first press-contact terminal 19 is repeated with energization, the holding force of the lead wires 16a and 16b of the crimp-type terminal 18, the first press-contact terminal The holding force of the 19 crimp-type terminals 18 can be maintained for a long time, and the highly reliable hermetic compressor 4 can be provided.

(Second Embodiment)
A second embodiment will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same component as the component demonstrated in 1st Embodiment, and the overlapping description is abbreviate | omitted.

  In the second embodiment, instead of the crimp-type terminal 18 described in the first embodiment, a crimp-type terminal 22 having a different shape is used, and other configurations are the same as those of the first embodiment. .

  FIG. 7 is a front view showing the crimp-type terminal 22 before the two lead wires 16a and 16b are fixed by caulking. The shape of the crimp-type terminal 22 before caulking and fixing the lead wires 16a and 16b is formed in a flat plate shape including a caulking fixing portion 22a having a large width dimension “a” and a connecting portion 22b having a small width dimension “b”. Has been. The ends of the two lead wires 16a and 16b are placed on the crimping fixing portion 22a of the crimp-type terminal 22, and the crimping fixing portion 22a is rounded so as to surround the ends of the lead wires 16a and 16b. By tightening, the two lead wires 16a and 16b are caulked and fixed. Further, when the caulking fixing portion 22a is rounded, the connecting portion 22b is also rounded in the same direction, whereby the connecting portion 22b is rounded into a cylindrical shape. The outer dimensions of the connecting portion 22b rounded into a cylindrical shape are smaller than the outer dimensions of the caulking fixing portion 22a in which the lead wires 16a and 16b are caulked and fixed. The crimp-type terminal 22 is formed using phosphor bronze or a Corson alloy, which is a material that is unlikely to undergo creep deformation and can maintain a caulking and holding force over a long period of time.

  FIG. 8 is a front view showing a connection portion between the two lead wires 16a and 16b and the winding 17 of each phase. Both ends of the winding 17 of each phase are inserted into the wiring insertion portion 21a of the wiring receiver 21, and the second press-contact terminal 20 is inserted into the terminal insertion portion (not shown) of the wiring receiver 21, thereby winding each phase. Both ends of the line 17 are connected. The second press contact type terminal 20 is inserted into the holding portion 19 c of the first press contact type terminal 19. The ends of the two lead wires 16a and 16b are caulked and fixed by caulking fixing portions 22a of the crimp-type terminals 22, and the connecting portions 22b of the crimp-type terminals 22 are first crimped using the caulking projections 19a and 19b. It is fixed to the terminal 19 by caulking.

  In such a configuration, also in the second embodiment, the end portions of the two lead wires 16a and 16b are caulked and fixed by the crimp-type terminal 22 and integrated as in the first embodiment. Therefore, when these two lead wires 16a and 16b are connected to the first pressure contact type terminal 19, the connection can be easily made without trouble as in the case of connecting one lead wire. . Further, since the two lead wires 16a and 16b are caulked and fixed by the crimp-type terminal 22, they are integrated so that when the stress is applied to the lead wires 16a and 16b, the caulking fixing force acting is applied. Occurrence of a situation in which the smaller lead wires 16a and 16b are detached from the caulking and fixing portions can be prevented, and the highly reliable hermetic compressor 4 can be provided.

  The crimp-type terminal 22 has a connecting portion 22b that is rounded into a cylindrical shape, and the connecting portion 22b has a diameter smaller than that of the rounded caulking fixing portion 22a. Therefore, the caulking projections 19a and 19b are used. Thus, the caulking and fixing to the first press contact type terminal 19 can be more reliably performed.

  In the first embodiment and the second embodiment, both the compression terminals 18 and 22 and the first pressure contact type terminal 19 are formed using phosphor bronze or a Corson alloy, but only one of them is made of phosphorus. You may form using bronze or a Corson type alloy.

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope of the present invention and the gist thereof, and are also included in the invention described in the claims and the equivalent scope thereof.

DESCRIPTION OF SYMBOLS 1 ... Refrigeration cycle apparatus, 4 ... Sealed compressor, 5 ... Condenser, 6 ... Expansion device, 7 ... Evaporator, 9 ... Sealed case, 10 ... Rear part of compressor, 11 ... Three-phase motor, 12 ... Rotating shaft, 15a, 15b ... Sealed terminal, 16a, 16b ... Lead wire, 17 (17U, 17V, 17W) ... Winding, 18 ... Crimp-type terminal, 19 ... Crimp-type terminal, 22 ... Crimp-type terminal

Claims (3)

A compression mechanism section and a three-phase motor that drives the compression mechanism section are housed in a sealed case, and a plurality of sealed terminals for supplying power to the three-phase motor are provided in the sealed case, In a hermetic compressor for connecting a plurality of lead wires connected to a winding of each phase of the three-phase motor using a pressure contact terminal,
The ends of the plurality of lead wires connected to the windings of the same phase among the lead wires connected to the respective sealed terminals are caulked and fixed by crimp-type terminals, and the crimp-type terminals are the press-contact type. A hermetic compressor characterized by being crimped to a terminal.   2. The hermetic compressor according to claim 1, wherein at least one of the crimp-type terminal and the press-contact terminal is formed of phosphor bronze or a Corson alloy.   The hermetic compressor according to claim 1, a condenser connected to the hermetic compressor, an expansion device connected to the condenser, and between the expansion device and the hermetic compressor And an evaporator connected to the refrigeration cycle apparatus.

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