JP2009108837A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compressor having a constitution capable of preventing a short circuit between lead-out lines for windings in the compressor and between electric motor terminals, even if heat affects a winding layer short circuit or the like in an electric motor. <P>SOLUTION: The compressor has lead out lines 5a, 5b and 5c of respective phases for connecting an electric motor winding 3 in an outer frame 1 and a lead-out line terminal 2a of an electric motor terminal 2 attached to the outer frame 1. All or part of lengths of the lead out lines 5a, 5b and 5c are covered with respective insulators 23a, 23b and 23c each having heat resistance exceeding those of the lead-out lines and insulation performance enough to prevent the short circuit between the lead-out lines. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a structure of an electric motor part of an electric refrigerant compressor used for a compressor, particularly an air conditioner.

In general, when the compressor winding reaches a rare short for some reason, the compressor will cause a short circuit between the coil lead wires inside the compressor and between the terminals of each phase of the compressor terminal. The short circuit current developed at this time may cause melting of the terminal of the compressor terminal and damage to the compressor electric circuit components.
Therefore, in the conventional compressor, the three lead wires are covered and bound with a braided sleeve made of a material having high heat resistance so as not to be separated in order to prevent contact with the rotating portion or the like. The compressor is filled with refrigerant and oil (see, for example, Patent Document 1).

In addition, in a compressor having a conventional internal thermo, in addition to the above-mentioned trouble phenomenon, due to the thermal effects such as the above-described winding layer short-circuit, the winding lead wire and the internal thermo lead wire inside the compressor The contact could lead to problems such as terminal melting of the internal thermo terminal and runaway operation of the compressor.
Therefore, in the compressor having another conventional internal thermo, the lead wire for the internal thermo is connected to the lead wire for the compressor winding as much as possible so as not to be separated to prevent contact with the rotating part. They are bundled together or wired with a light twist on the bundle.
Japanese Utility Model Publication No. 63-136276 (pages 8-9, FIG. 4)

When the above conventional compressor is damaged due to a short circuit or overload of the winding for some reason, the insulation of the lead wire near the connection with the winding is damaged due to the heat effect, and the space between the lead wires May cause a short circuit. When a short circuit occurs, there is a risk that the insulation of the lead wires wired in contact with each other due to the short circuit current will be further damaged due to overheating, and the short circuit will continue intermittently toward the compressor terminal side.
In addition, the copper (leader material) melts and the radicals increase due to a short circuit between the lead wires, which eventually leads to a short circuit between the phase terminals of the terminal, and a part of the terminal melts to compress it. There is also a risk that the refrigerant and lubricating oil in the machine may be ejected outside the compressor.
Note that when the refrigerant or oil is ejected, the ejected mineral oil, alkylbenzene, ester, ether, PAG or the like may ignite. Furthermore, if the refrigerant is flammable, such as propane or isobutane, explosive combustion may occur.
Also, when the refrigerant is CO2, the operating pressure is 10 MPa, which is higher than other refrigerants (the operating pressure is about 2 MPa), so the glass terminal of the terminal is melted. As a result, the glass terminal is caused by the high internal pressure inside the compressor. There was a problem that the damage caused by jumping out of the compressor with high energy may increase.

In addition, in the compressor having the conventional internal thermo, in addition to the problems in the compressor of the conventional example, there is a possibility that the lead wire for winding and the lead wire for internal thermo may be short-circuited. When the internal thermo terminal is located in the middle of the lead-out line, there is a possibility that a short circuit occurs between them, the internal thermo terminal melts, and the internal refrigerant or lubricating oil blows out.
In addition, when the lead wire for winding and the lead wire for internal thermo are short-circuited, the current fuse of the control circuit is blown, but the coil of the magnetic contactor is energized in a form of bypassing the protective device, and the compressor is Continuous operation without protection device.
In such a case, depending on the characteristics of the short circuit protection of the power breaker, the compression will eventually occur due to the occurrence of a short circuit current due to a short circuit between the winding layer short of the compressor motor and the coil lead wire inside the compressor. Ignition due to melting of machine terminals, injection of refrigerant or lubricating oil, continuation of large current arc due to exceeding allowable contact current of contactor, ignition due to melting of thermal overcurrent relay heater, or wiring There is a problem that the weakest part on the circuit is damaged, such as a short circuit ignition between lines due to thermal damage of the coating, and in some cases there is a risk of ignition.

  In addition, when the compressor is continuously operated without the protection device, the contact of the contactor is also welded due to frequent over-current due to the start / stop of the compressor or the winding layer short-circuit. As a result, the same damage as described above may occur.

  Therefore, the present invention has been made to solve such a problem, and even if a thermal effect occurs in a winding layer short circuit of an electric motor, between winding lead wires inside the compressor, and further between terminals. A compressor having a structure capable of preventing short circuiting, and in a compressor having an internal thermo, further comprising a compressor having a structure capable of preventing a short circuit between the lead wire for winding and the lead wire for internal thermo. It is to provide.

  In the compressor according to the present invention, the total length or a part of each lead wire of each phase connecting between the motor winding inside the outer shell of the compressor and the inner terminal of the motor terminal attached to the outer shell. It is covered with an insulator having heat resistance higher than that of the lead wire coating and insulation sufficient to prevent a short circuit between the lead wires.

  In the compressor according to the present invention, the full length of each lead wire of each phase connecting the motor winding inside the outer shell of the compressor and the inner terminal of the motor terminal attached to the outer shell or a part thereof Is covered with an insulator that has heat resistance higher than that of the lead wire coating and sufficient insulation to prevent a short circuit between the lead wires. Even in the case of, a short circuit between the lead wires is prevented, and even if a short circuit occurs between the lead wires, the continuation is prevented to prevent the electromagnetic contactor, the thermal overcurrent relay, the compression provided in the compressor. By reducing the influence of short-circuit current on compressor circuit components such as wiring to the machine and terminals of the motor terminal, a highly safe compressor capable of preventing such damage can be obtained.

Embodiment 1 FIG.
1 is a partially cutaway plan view showing an electric motor part of a compressor according to Embodiment 1 of the present invention, FIG. 2 is a partial cross-sectional view showing the electric motor part of the compressor, and FIG. 3 is an electric motor part of the compressor. FIG. 4 is an explanatory view showing a lead wire for winding of the motor part of the compressor.
1 and 2, an electric motor terminal 2 having three lead wire terminals 2a for each of three phases is provided on the upper surface of an outer shell 1 made of a compressor metal. The lead wire terminal 2a of the electric motor terminal 2 is configured such that one end is located on the outside and connected to the power line, and the other end is located on the inside and connected to the lead wire 5 covered with the synthetic resin. ing.
Inside the outer shell 1, a winding 3, a stator 4, and a rotor 6 of an electric motor are disposed.
For each phase, the lead wire 5 has one terminal connected to the winding terminal at the coil end portion of the winding 3, and the other terminal connected to the lead wire terminal 2a for each phase of the motor terminal 2. . A discharge pipe 7 is further provided on the upper surface of the outer shell 1.

As shown in the electric circuit diagram of FIG. 3, one of the phases of the contact 12 of the compressor magnetic contactor 11 is connected to the thermal overcurrent relay 14, and the other of the phases is connected to the power supply terminal block 20. Yes. Further, one side of the coil part 13 of the electromagnetic contactor 11 for the compressor is connected to one side of the contact part 16 of the thermal overcurrent relay 14, and the other side of the coil part 13 is connected to one phase of the power terminal block 20. .
The two-phase heater portion 14 of the thermal overcurrent relay 14 is connected to the U-phase and W-phase lead wire terminals 2 a of the motor terminal 2. One of the phases of the contact 12 of the compressor electromagnetic contactor 11 is directly connected to the V-phase power supply terminal 2 a of the motor terminal 2.

The other end of the contact portion 16 of the thermal overcurrent relay 14 is connected to another phase in the middle of the power terminal block 20 via a contact 18 and an operation switch 19 of another protective device of the compressor. The other phase in the middle of the power supply terminal block 20 is connected to the V-phase lead wire terminal 2 a of the motor terminal 2 via the contact 12 of the compressor magnetic contactor 11.
A fuse 17 a is provided between the operation switch 19 and another phase in the middle of the power terminal block 20, and a fuse 17 b is disposed between the coil portion 13 of the compressor magnetic contactor 11 and the other phase of the power terminal block 20. Is provided. The three-phase power terminal block 20 is connected to a three-phase power source of RST via a current breaker 22.

  Here, the compressor starts operation by the operation of the operation switch 19, but in the case of overcurrent, the temperature of the heater 15 of the thermal overcurrent relay 14 for the compressor rises so that the thermal overcurrent relay 14 is bimetallic. The contact 16 is opened, and the contact 12 is opened by stopping the energization of the coil portion 13 of the compressor electromagnetic contactor 11 to stop the operation of the compressor.

As shown in FIG. 4, the lead wires 5a and 5b having an outer diameter of about 2 to 4 mm for each phase connecting the winding terminal and the lead wire terminal 2b of the motor terminal 2 at the coil end portion of the winding 3. The outer circumference of the entire length of 5c has heat resistance more than the lead wire coating, and the dielectric strength and nonflammability that does not cause dielectric breakdown at the operating voltage up to 400 ° C due to the temperature rise at the time of rare winding shorts. It is covered with cylindrical insulators 23a, 23b, 23c formed of a material such as glass fiber or mica.
As described above, the outer circumferences of the entire lengths of the lead wires 5a, 5b, and 5c are covered with the insulators 23a, 23b, and 23c having heat resistance equal to or higher than that of the lead wires, respectively. Even if it exists, the short circuit between leader line 5a, 5b, 5c is prevented.
Further, in the entire length of the lead wires 5a, 5b, and 5c, the portions where the lead wires are in close contact with each other except the portions where the lead wires are spaced apart in the vicinity of the three lead wire terminals 2a of the motor terminal 2. Part of the outer periphery is covered with insulators 23a, 23b, and 23c, and the motor windings deteriorate due to aging, and even if there is an abnormal temperature rise at the time of shorting of the windings, the part is pulled out. A short circuit between the lines 5a, 5b and 5c is prevented.

Embodiment 2. FIG.
FIG. 5 is an explanatory view showing a lead wire for winding of the motor part of the compressor according to the second embodiment of the present invention, and FIG. 6 is a partial sectional view showing a terminal part for the motor of the motor part of the compressor.
In the second embodiment, as shown in FIG. 5, the lead wires 5a, 5b, and 5c coated with the synthetic resin are respectively separated from each other between the three lead wire terminals 2a in the three phases of the motor terminal 2. It is held by the interval holding member 24 with an interval of about 12 mm).
This spacing holding member 24 is formed in a circular shape having a predetermined thickness, for example, a ceramic material having heat resistance, insulation and flame retardance equal to or higher than flame retardant grade V-0. Three lead wire insertion grooves 24a are provided at substantially equal angular intervals.

The spacing member 24 is supported by an inner flange 25a provided at the bottom of a cylindrical holding member support 25 attached to the outer periphery of the motor terminal 2 with an adhesive.
The holding member support 25 is attached to the outer periphery of the electric motor terminal 2 with an adhesive, but may be formed integrally with the electric motor terminal 2.
As described above, the lead wires 5a, 5b, and 5c connected to each of the three lead wire terminals 2a of each phase of the motor terminal 2 have a heat resistance, insulation, and non-flammability that are higher than those of the lead wire coating. Since the three lead wire insertion grooves 24a of the member 24 are inserted, the three lead wire terminals 2a are held with an interval of the distance between them, and the interval holding member 24 has an insulating property. Even if there is an abnormal temperature rise at the time of a wire layer short circuit, a short circuit between the lead wires 5a, 5b and 5c is prevented.

Further, the outer periphery of the spacing member 24 that holds the lead wires 5a, 5b, and 5c at intervals is in contact with the insulation of the lead wires 5a, 5b, and 5c in a state in which the insulation of the lead wires 5a, 5b, and 5c is lost. Even so, since a sufficient distance is secured between the lead wires 5a, 5b, and 5c by the spacing member 24, a short circuit between the lead wires 5a, 5b, and 5c is prevented.
In addition, you may make it install this space | interval holding member 24 not only in one place of a leader line path | route but in multiple places.

Embodiment 3 FIG.
FIG. 7 is a cross-sectional view showing an electric motor terminal portion of the electric motor section of the compressor according to the third embodiment of the present invention.
In the third embodiment, each phase of the winding 3 to which the lead wires 5a, 5b, 5c coated with the synthetic resin connected to the three lead wire terminals 2a of each phase of the motor terminal 2 are connected. Separately set positions of the winding terminals are provided so that the coil end portions of the winding 3 are divided so as to have substantially the same interval.
As described above, the position of the winding terminal set for each phase of the winding 3 to which the lead wires 5a, 5b, and 5c are connected is substantially the same distance in the form of dividing the coil end portion of the winding 3. The lead wires 5a, 5b, 5c from the three lead wire terminals 2a of each phase of the motor terminal 2 to the winding terminal of the winding wire 3 are close to each other. Since they are wired and are sufficiently separated from each other, a short circuit between the lead wires 5a, 5b, and 5c can be prevented even if there is an abnormal temperature rise at the time of winding layer short-circuit.

Embodiment 4 FIG.
FIG. 8 is a cross-sectional view showing a motor terminal portion of the motor portion of the compressor according to the fourth embodiment of the present invention.
Although the electric motor terminal 2 of the first to third embodiments has three lead wire terminals 2a for each phase, in this fourth embodiment, three single wires each having a lead wire terminal for each phase are provided. Terminals 26a, 26b, and 26c are included.
These three single terminals 26a, 26b, and 26c are provided on the upper surface of the outer shell 1 at substantially equal angular intervals.
Further, the position of the winding terminal set for each phase of the winding 3 to which the lead wires 5a, 5b, and 5c coated with the synthetic resin are connected is also the coil of the winding 3 as in the third embodiment. The end part is divided and provided.
As described above, three single terminals 26a, 26b, and 26c are provided on the upper surface of the outer shell 1 at substantially equal angular intervals, and are set for each phase of the winding 3 to which the lead wires 5a, 5b, and 5c are connected. Since the positions of the winding terminals thus formed are also provided separately in the form of dividing the coil end portion of the winding 3, each of the windings 3 from the respective lead wire terminals of the three individual terminals 26a, 26b, 26c. The lead wires 5a, 5b, 5c connected to the winding terminals set for each phase are wired without approaching each other and sufficiently separated from each other. Even in this case, a short circuit between the lead wires 5a, 5b and 5c is prevented.

Embodiment 5 FIG.
9 is a partial cross-sectional view showing an electric motor part of a compressor according to Embodiment 5 of the present invention, and FIG. 10 is a cross-sectional view of the electric motor part of the compressor.
The fifth embodiment is a plug in which three lead wires 5a, 5b, 5c coated with three synthetic resins are connected to the three lead wire terminals 2a of the motor terminals 2 of the first to third embodiments. The connector 27 is detachably connected.
When the plug-like connector 27 is connected to the three lead wire terminals 2a of the electric motor terminal 2, the three lead wire terminals 2a are located therein, and the space between the three lead wire terminals is defined. It is configured to fill, has insulating properties, good heat resistance, and is a material having tracking strength of CTI value 600V or more, for example, thermosetting resin, or insulating, heat resistant, flame retardant For example, it is formed of ceramic or the like, which is a nonflammable material having a grade of V-0 or higher.

  As described above, the three lead wire terminals 2b of the motor terminal 2 are detachably attached to the plug-like connector 27 made of a material having insulating properties and good heat resistance. When connected to 2b, the three lead wire terminals 2b are located inside to fill the space between the lead wire terminals, so that there is a short circuit between the three lead wires 5a, 5b, 5c. Even if it occurs, it is possible to prevent a short circuit between the three lead wire terminals.

Embodiment 6 FIG.
11 is a partially cutaway plan view showing an electric motor part of a compressor according to a sixth embodiment of the present invention, FIG. 12 is a partial cross-sectional view showing the electric motor part of the compressor, and FIG. 13 is an electric motor part of the compressor. FIG. 14 is an explanatory diagram showing a lead wire for winding of the motor part of the compressor.
The compressor of the sixth embodiment has an internal thermo. The same components as those of the compressor of the first embodiment are denoted by the same reference numerals, and the description of the duplicated configuration is omitted, and the compressor of the first embodiment is omitted. A configuration different from the compressor will be described.
11 and 12, the compressor of the sixth embodiment is provided with an internal thermo terminal 8 on the upper surface of the outer shell 1.
The internal thermo terminal 8 has two lead wire terminals 8a to which an internal thermo lead wire 10 coated with a synthetic resin is connected.
An internal thermo 9 is provided inside the outer shell 1 in contact with the coil end portion of the winding 3.

As shown in the electric circuit diagram of FIG. 13, one lead wire terminal 8a of the internal thermo terminal 8 is connected to the contact portion 16 of the thermal overcurrent relay 14, and the other lead wire terminal 8a is compressed. It is connected to a contact 18 of another protective device of the machine.
Also, one lead wire terminal 8a of the internal thermo terminal 8 is connected to one of the internal thermo 9 via the internal thermo lead wire 10, and the other lead wire terminal 8a is connected to the internal thermo 9. Is connected to the other through an internal thermo lead 10.

Here, the compressor starts operation by the operation of the operation switch 19, but in the case of overcurrent, the temperature of the heater 15 of the thermal overcurrent relay 14 for the compressor rises so that the thermal overcurrent relay 14 is bimetallic. The contact 16 is opened, and the contact 12 is opened by stopping the energization of the coil portion 13 of the compressor electromagnetic contactor 11 to stop the operation of the compressor.
Similarly, when an abnormal temperature rise occurs in the compressor winding, the internal thermo 9 is actuated to open the contact and stop the operation.

In the sixth embodiment, the outer circumferences of the two internal thermo lead wires 10a and 10b having an outer diameter of about 2 to 4 mm have heat resistance equal to or higher than that of the lead wire, and more than at the time of winding rare short. It is covered with an insulator 28 made of a material such as glass fiber or mica having a dielectric strength and nonflammability that does not cause dielectric breakdown at an operating voltage up to 400 ° C. due to temperature rise.
Further, the total length of the lead wires 5a, 5b, 5c of the outer diameter of about 2 to 4 mm of each phase connecting the winding terminal and the lead wire terminal 2a of the motor terminal 2 at the coil end portion of the winding 3 is as follows. The outer periphery is covered with insulators 23a, 23b, and 23c made of a material such as glass fiber or mica having heat resistance equal to or higher than that of the lead wire.

As described above, the outer peripheries of the total length of the two internal thermo lead wires 10a and 10b are covered with the insulator 28 made of a material having heat resistance equal to or higher than the lead wire covering, and the lead wires 5a, 5b, Since the outer circumference of the entire length of 5c is covered with insulators 23a, 23b, and 23c having heat resistance equal to or higher than that of the lead wire, the lead wires 5a, 5b, and 5c can be used even when there is an abnormal temperature rise during the winding layer short-circuit In addition to the short circuit between them, the short circuit between the lead wires 5a, 5b, 5c and the internal thermo lead wires 10a, 10b is also prevented.
In FIG. 14, the two outer peripheral portions of the internal thermo lead wires 10a and 10b are covered with the same insulator 28, but a separate insulator is provided for each of the internal thermo lead wires 10a and 10b. The same effect can be expected even if covered with.

Embodiment 7 FIG.
FIG. 15 is an explanatory view showing a lead wire for winding of the motor part of the compressor according to the seventh embodiment of the present invention.
The seventh embodiment relates to a compressor having an internal thermo, and is configured to have a spacing member 29 that is substantially similar to the second embodiment of the compressor having no internal thermo.
The spacing member 29 is formed in a circular shape having a predetermined thickness, for example, a ceramic material having heat resistance, insulation, and flame retardance of V-0 or higher than the leader wire coating, and is formed on the outer periphery. Five lead wire insertion grooves 29a are provided at substantially equal angular intervals.

Three lead lines 5a, 5b, 5c covered with synthetic resin are inserted into the three lead line insertion grooves 29a, and two internal lines covered with synthetic resin are inserted into the two lead line insertion grooves 29a. By being inserted through the thermo lead wires 10a and 10b, the three lead wire terminals 2a are held with an interval of the distance between them, and the two internal thermo lead wires 10a and 10b. Since the distance holding member 24 has heat resistance, insulation and non-flammability more than the lead wire cover, even if there is an abnormal temperature rise at the time of winding layer short, Short-circuiting is also prevented between the wires 5a, 5b and 5c, between the internal thermo lead wires 10a and 10b, between the lead wires 5a, 5b and 5c, and between the internal thermo lead wires 10a and 10b.
The spacing member 29 is held by an inner flange 25 provided at the bottom of a cylindrical holding member holder 25 which is integrated with the motor terminal 2 or attached to the outer periphery of the motor terminal 2 with an adhesive. .

Further, in the state where the insulation of the lead wires 5a, 5b, 5c and the internal thermo lead wires 10a, 10b has lost the insulating property, the outer shell 1 and the lead wires 5a, 5b, 5c and the internal thermo use Even if the outer periphery of the interval holding member 29 that holds the lead wires 10a and 10b at an interval comes into contact, the lead wires 5a, 5b and 5c, the internal thermo lead wires 10a and 10b, and the lead wires 5a and 5b. 5c and the internal thermo lead lines 10a, 10b are secured by the spacing member 29, so that the space between the lead lines 5a, 5b, 5c and the internal thermo lead lines 10a, 10b is secured. Is prevented from short circuiting.
In addition, you may make it this space | interval holding member 29 install not only in one place of a leader line path | route but in multiple places.

In addition, although the insulator shown in FIG. 15 held a total of five leader lines by one spacing member 29, the spacing members for the three leaders shown in FIG. The same effect can be expected even if a spacing member is provided for each of the lead wires for nalthermo.
Moreover, the same effect can be obtained by holding the gap holding members for the three lead lines and the gap holding members for the two lead lines for the internal thermo by the holding member support tools as shown in FIG. I can expect.

Embodiment 8 FIG.
FIG. 16 is a cross sectional view showing a motor terminal portion of the motor portion of the compressor according to the eighth embodiment of the present invention.
The eighth embodiment relates to a compressor having an internal thermo, in which the lead wire 5 covered with a synthetic resin from the motor terminal 2 to the winding wire 3 and the winding 3 to which the lead wire 5 is connected are connected. The line terminal connecting portion is sufficient to prevent a short circuit between the internal thermo lead 9 and the internal thermo 9 that are covered with the synthetic resin from the internal thermo terminal 8 to the internal thermo 9. The distance is secured.
As described above, the lead wire 5 and the internal thermo lead wire 10 can prevent a short circuit between them by obtaining a sufficient spatial distance even when these insulating coatings melt.

Embodiment 9 FIG.
FIG. 17 is a cross-sectional view showing a motor terminal portion of the motor portion of the compressor according to the ninth embodiment of the present invention.
The ninth embodiment relates to a compressor having an internal thermo, and includes three lead wires 5a, 5b and 5c coated with a synthetic resin, and an internal thermo lead wire 10a coated with a synthetic resin. The lead wire terminals connected to the two wires 10b are accommodated in one terminal 30 with a sufficient interval on the circumference of the winding coil end.
And the position of the coil | winding terminal of the coil | winding 3 to which the three leader lines 5 connected to the five leader line terminals of the terminal 30 and the two lead lines 10 for internal thermos are connected, respectively, The three coil end portions are divided and provided.

  As described above, one terminal 30 having five lead wire terminals to which the three lead wires 5 and the two internal thermo lead wires 10 are respectively connected is provided, and the three lead wires 5 and 2 are provided. Since the position of the winding terminal of the winding 3 to which each of the lead wires for internal thermo 10 is connected is divided and provided so as to divide the coil end portion of the winding 3, Each lead wire 5 and the internal thermo lead wire 10 from each lead wire terminal to the winding terminal of the winding 3 are wired without approaching each other and are sufficiently separated from each other. Even if there is an abnormal temperature rise during a short circuit, a short circuit between the lead wire 5 and the internal thermo lead wire 10 is prevented.

Embodiment 10 FIG.
FIG. 18 is a cross-sectional view showing a motor terminal portion of the motor portion of the compressor according to the tenth embodiment of the present invention.
The tenth embodiment relates to a compressor having an internal thermo, and has a configuration substantially similar to that of the fourth embodiment.
In the tenth embodiment, three individual terminals 26a, 26b, 26c to which lead wires 5a, 5b, 5c coated with three synthetic resins are connected and an internal thermo coated with two synthetic resins are used. It is comprised from the terminal 8 for internal thermos to which leader line 10a, 10b is connected. The three single terminals 26a, 26b, 26c and one internal thermo terminal 8 are provided on the upper surface of the outer shell 1 at substantially equal angular intervals.
Also, the position where the winding terminal set for each phase of the winding 3 to which the lead wires 5a, 5b, 5c are connected is divided in the coil end portion of the winding 3 as in the third embodiment. The positions where the winding terminals and the internal thermo 9 are provided are also provided separately.

  As described above, the three individual terminals 26a, 26b, 26c and the internal thermo terminal 8 are provided on the upper surface of the outer shell 1 at substantially equal angular intervals, and the lead wires 5a, 5b, 5c are connected to each other. The position of the winding terminal set for each phase of the wire 3 is separately installed by dividing the coil end portion of the winding 3 and the position where the winding terminal and the internal thermo 9 are provided is also divided. Since they are provided apart from each other, the respective lead wires 5a connected to the winding terminals set for the respective phases of the winding 3 from the respective lead wire terminals of the three individual terminals 26a, 26b, 26c, 5b and 5c and the internal thermo lead wires 10a and 10b connected to the lead wire terminal of one internal thermo terminal 8 are wired without approaching each other. Therefore, even if there is an abnormal temperature rise when the winding layer is short-circuited, the lead wires 5a, 5b, 5c and the lead wires 5a, 5b, 5c and the internal thermo lead wires 10a, 10b are short-circuited. Is prevented.

Embodiment 11 FIG.
FIG. 19 is a partial cross-sectional view showing an electric motor part of the compressor according to the eleventh embodiment of the present invention.
The eleventh embodiment relates to a compressor having an internal thermo, and has a configuration substantially similar to that of the fifth embodiment.
In this eleventh embodiment, three lead wires 5a, 5b, 5c covered with synthetic resin are connected to the three lead wire terminals 2a of the motor terminal 2 shown in the fifth embodiment. The connector 27 is detachably connected, and the two lead wire terminals 8a of the internal thermo terminal 8 are connected to the two lead wires 10a and 10b for internal thermo coated with synthetic resin. A plug-like internal thermo connector 31 is detachably connected.

  When the internal thermo connector 31 is connected to the two lead wire terminals 8a of the internal thermo terminal 8 in the same manner as the connector 27, the two lead wire terminals 8a are located therein. It is configured to fill the space between the two lead wire terminals, has insulating properties, good heat resistance, and has a tracking resistance with a CTI value of 600 V or more, such as a thermosetting resin, or an insulating property. It is formed of, for example, ceramic which is a material having heat resistance and a flame retardance grade of V-0 or higher.

  As described above, the plug-like connector 27 formed of a material that is detachable from the three lead wire terminals 2a of the electric motor terminal 2 and has insulating properties and good heat resistance has three lead wire terminals 2a. When the three lead wire terminals 2b are located inside the lead wire, the space between the lead wire terminals 5b is filled with the three lead wire terminals 2b, so that a short circuit occurs between the three lead wires 5a, 5b and 5c. However, it is possible to prevent the three lead wire terminals from being short-circuited, and to be able to attach and detach to the two lead wire terminals 8a of the internal thermo terminal 8 so as to have insulating properties and good heat resistance. When the formed plug-like internal thermo connector 31 is connected to the two lead wire terminals 8a, the two lead wire terminals 8a are located therein to fill the space between the lead wire terminals. Because it is configured as Even if a short circuit occurs between the two lead wires 5a, 5b, 5c and the two internal thermo lead wires 10a, 10b, the two lead wire terminals 8a of the internal thermo terminal 8 are short-circuited. Can be prevented, and melting can be prevented.

Any refrigerant such as HCFC and HFC can be used as the refrigerant in the compressors of the first to eleventh embodiments. However, safety is particularly high for those that burn explosively, such as flammable refrigerants such as propane and isobutane. Can be increased.
In addition, even when the refrigerant is CO2, glass terminal melting due to a short circuit is prevented, so that a part of the glass terminal has a high internal pressure inside the compressor (normal refrigerant is 2 MPa, CO2 is 10 MPa) with high energy. Jumping out of the compressor can be prevented and safety can be further improved.

  Further, the compressor has the same effect in any case such as a high pressure type and a low pressure type container, a rotary, a reciprocating, a scroll, and a swing compressor.

The partially cutaway top view which shows the electric motor part of the compressor of Embodiment 1 of this invention. The fragmentary sectional view which shows the electric motor part of the compressor. The electric circuit diagram of the electric motor part of the compressor. Explanatory drawing which shows the lead wire for winding of the electric motor part of the compressor. Explanatory drawing which shows the lead wire for winding of the motor part of the compressor of Embodiment 2 of this invention. The fragmentary sectional view which shows the terminal part for electric motors of the electric motor part of the compressor. The cross-sectional view which shows the terminal part for motors of the motor part of the compressor of Embodiment 3 of this invention. The cross-sectional view which shows the terminal part for electric motors of the electric motor part of the compressor of Embodiment 4 of this invention. The fragmentary sectional view which shows the electric motor part of the compressor of Embodiment 5 of this invention. The cross-sectional view of the electric motor part of the compressor. The partially cutaway top view which shows the electric motor part of the compressor of Embodiment 6 of this invention. The fragmentary sectional view which shows the electric motor part of the compressor. The electric circuit diagram of the electric motor part of the compressor. Explanatory drawing which shows the lead wire for winding of the electric motor part of the compressor. Explanatory drawing which shows the lead wire for winding of the electric motor part of the compressor of Embodiment 7 of this invention. The cross-sectional view which shows the terminal part for motors of the motor part of the compressor of Embodiment 8 of this invention. The cross-sectional view which shows the terminal part for electric motors of the electric motor part of the compressor of Embodiment 9 of this invention. The cross-sectional view which shows the terminal part for motors of the motor part of the compressor of Embodiment 10 of this invention. The fragmentary sectional view which shows the electric motor part of the compressor of Embodiment 11 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Outer shell, 2 Terminal for motors, 2a Lead wire terminal, 3 Winding, 4 Stator, 5 Lead wire, 5a, 5b, 5c Lead wire, 6 Rotor, 23a, 23b, 23c Insulator.

Claims (26)

  The total length or a part of each coated lead wire of each phase that connects between the motor winding inside the outer shell of the compressor and the inner terminal of the motor terminal attached to the outer shell, or more than the lead wire coating A compressor characterized in that it is covered with an insulator having an insulation property sufficient to prevent the short circuit between the lead wire and the lead wire.   The compressor according to claim 1, wherein the insulator has a dielectric strength that does not cause dielectric breakdown at an operating voltage up to an ambient temperature of 400 ° C.   The compressor according to claim 1, wherein the insulator has flame retardancy.   Spatial distance that does not cause a short circuit between the lead wires at one or more of the lead wires connecting the motor windings inside the outer shell of the compressor and the internal terminals of the motor terminals attached to the outer shell. The compressor is characterized in that it is provided with an interval holding material having heat resistance to be held by the wire and sufficient insulation to prevent a short circuit between the lead wires.   The interval holding member has a plurality of lead wire insertion grooves through which the lead wires of each phase are inserted so that the distance between the lead wires is equal to or greater than the distance between the terminals of the motor terminal at substantially equal angular intervals on the outer periphery. The compressor according to claim 4, wherein   The compressor according to claim 4 or 5, wherein the spacing member has a dielectric strength that does not cause dielectric breakdown at an operating voltage up to an ambient temperature of 400 ° C.   The compressor according to any one of claims 4 to 6, wherein the spacing member has flame retardancy.   The compressor according to any one of claims 4 to 7, wherein the interval holding member is held by a holding member holder provided in the electric motor terminal.   A winding terminal for each phase of the motor winding inside the outer shell connected to an inner terminal of an electric motor terminal attached to the outer shell of the compressor is connected to the motor winding inside the outer shell. A compressor characterized in that the coil end portion of the winding is divided and provided so as to have substantially the same interval.   The covered lead wire of each phase connected to the winding terminal of each phase of the motor winding inside the outer shell of the compressor is one internal terminal of a single terminal set for each phase attached to the outer shell A compressor characterized by being connected to each.   Removably connectable to the internal terminal of the motor terminal attached to the outer shell of the compressor, and each phase covered lead wire connected to the respective winding terminal of the motor winding inside the outer shell A compressor comprising a plug-like connector having at least heat resistance and insulation among insulation and nonflammability sufficient to prevent a short circuit of connected lead wire terminals.   The compressor according to claim 11, wherein the connector has flame retardancy of flame retardancy grade V-0 or higher.   The compressor according to claim 11, wherein the connector is a thermosetting resin and has a tracking strength of a CTI value of 600 V or more. The total length of each covered lead wire of each phase connecting between the motor winding inside the outer shell of the compressor and the inner terminal of the motor terminal attached to the outer shell, or a part thereof,
The total length or a part of the two coated internal thermo lead wires connecting between the internal thermo provided inside the outer shell and the internal terminal of the internal thermo terminal attached to the outer shell. ,
A compressor characterized by being covered with an insulating material having at least heat resistance and insulation properties among heat resistance higher than that of the lead wire coating and insulation and non-flammability sufficient to prevent a short circuit between the lead wires.   The compressor according to claim 14, wherein the insulator has a dielectric strength that does not cause dielectric breakdown at an operating voltage up to an ambient temperature of 400 ° C.   The compressor according to claim 14 or 15, wherein the insulator has flame retardancy.   A covered lead wire connecting between the motor winding inside the outer shell of the compressor and the inner terminal of the motor terminal attached to the outer shell, an internal thermo provided inside the outer shell, and the outer thermometer attached to the outer shell In one or more of the two coated internal thermo lead wires connecting between the internal thermo terminal terminals, the lead wires are held at a spatial distance that does not cause a short circuit. A compressor characterized by being provided with a spacing member having insulation and nonflammability sufficient for heat resistance and prevention of a short circuit between lead wires.   The spacing members are arranged at substantially equal angular intervals on the outer periphery, and each of the lead wires for each phase and the two lead wires for the internal thermo are provided so that the space between the lead wires is equal to or greater than the distance between the terminals of the compressor terminal. The compressor according to claim 17, further comprising a plurality of lead wire insertion grooves to be inserted.   The compressor according to claim 17 or 18, wherein the spacing member has a dielectric strength that does not cause dielectric breakdown at an operating voltage up to an ambient temperature of 400 ° C.   The compressor according to any one of claims 17 to 19, wherein the spacing member has flame retardancy.   A covered lead wire connecting between the motor winding inside the outer shell of the compressor and the inner terminal of the motor terminal attached to the outer shell, an internal thermo provided inside the outer shell, and the outer shell Characterized in that the two coated internal thermo lead wires connecting between the internal thermo terminal terminals are separated from each other by a sufficient distance to prevent a short circuit. Compressor.    A winding terminal for each phase of the motor winding inside the outer shell to which a coated lead wire of each phase connected to an inner terminal of a terminal attached to the outer shell of the compressor is connected; Provided with an internal thermo that is connected to the coated internal thermo lead wire connected to the internal terminal so that the coil end portion of the motor winding is divided so as to have substantially the same interval. The compressor characterized by having.   The covered lead wires of each phase connected to the respective winding terminals of the motor windings inside the outer shell of the compressor are inside one single terminal set for each phase attached to the outer shell. Two coated internal thermo lead wires connected to the terminals and connected to the internal thermo provided inside the outer shell are connected to the two internal terminals of the internal thermo terminal attached to the outer shell. A compressor characterized by being connected to each other. Removably connectable to the internal terminal of the motor terminal attached to the outer shell of the compressor, and connected to each phase covered lead wire connected to the individual winding terminal of the motor winding inside the outer shell A plug-like connector having at least heat resistance and insulation among the insulation and nonflammability sufficient to prevent a short circuit of the lead wire terminal,
Connected to the internal terminal of the internal thermo terminal attached to the outer shell, and can be connected to two coated internal thermo lead wires connected to the internal thermo provided inside the outer shell. Among the insulation and non-flammability sufficient to prevent short circuit of the lead wire terminal for internal thermo, the plug-like internal thermo connector having heat resistance and insulation having at least heat resistance and insulation, and
The compressor characterized by having.   The compressor according to claim 24, wherein each of the connector and the connector for internal thermo has flame retardancy of flame retardancy grade V-0 or higher.   25. The compressor according to claim 24, wherein each of the connector and the internal thermo connector is a thermosetting resin and has a tracking strength of a CTI value of 600V or more.

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