Leading-out wire fixing structure, motor and compressor thereof

Abstract

The invention provides a leading-out wire fixing structure, a motor and a compressor thereof, the leading-out wire fixing structure comprises a fixing part, the fixing part is installed on an end cover of an electric appliance, a stator of the electric appliance is provided with a winding, the winding is provided with a neutral point and a leading-out wire, the leading-out wire is used for being connected with a power supply, and the neutral point is connected with the leading-out wire. And the neutral point and the outgoing line are arranged on the fixing piece. According to the invention, the technical problem in the prior art that the neutral point terminal is fixed on the surface of a winding or a motor insulating framework after being coated with an insulating layer, and liquid infiltrates the neutral point terminal can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of compressors, and in particular relates to a lead-out wire fixing structure, a motor and a compressor thereof. Background Art

[0002] Most compressor motors with "Y" type wiring use a neutral point terminal that is covered with an insulating layer and then fixed on the winding surface or on the motor insulation frame. However, since the insulating layer covered on the surface of the neutral point is a PET film or other insulating film with similar performance that is rolled into a tube with one end sealed and the other end open, this structure can effectively prevent the neutral point terminal from piercing the insulating layer on the surface of the adjacent winding conductor due to sharp corners or sharp edges caused by riveting, causing leakage problems. However, the semi-open structure cannot completely seal the conductive neutral point terminal, and the insulating sleeve with one end closed in the layered winding is prone to accumulation of liquid inside the compressor, which in turn causes the neutral point terminal to communicate with the liquid attached to the external surface through the liquid in the sleeve to generate leakage current; and when the compressor is used in an air-conditioning system, there are certain application scenarios where the internal liquid level is too high or even completely submerges the motor. At this time, the liquid with strong conductivity (a mixture of compressor refrigeration oil and refrigerant) will pass through the gap between the sleeve outside the neutral point terminal and the wire and infiltrate the neutral point terminal, resulting in excessive leakage current.

[0003] An existing improvement plan is to replace the layered film winding sleeve outside the neutral point with a heat-shrinkable sleeve that can shrink when heated, in order to reduce the gap between the neutral point terminal and the outer sleeve, reduce the volume of liquid in the sleeve, and at the same time dip the neutral point or the entire machine surface in paint to further increase the thickness of the insulation layer, and reduce the leakage current through the above solution. However, there are problems of complex process and low production efficiency, and this technical solution does not completely solve the problem of increased leakage current caused by liquid infiltration of the neutral point terminal, and it still cannot meet the leakage current requirements for applications with high leakage current requirements.

[0004] Since the neutral point terminal in the prior art is fixed on the winding surface or on the motor insulation frame after being covered with an insulating layer, there is a situation where liquid infiltrates the neutral point terminal, resulting in technical problems such as increased leakage current. Therefore, the present invention studies and designs a lead wire fixing structure, a motor and its compressor. Summary of the invention

[0005] Therefore, the present invention provides a lead wire fixing structure, a motor and a compressor thereof, which can solve the technical problem in the prior art that the neutral point terminal is fixed on the winding surface or on the motor insulation frame after being covered with an insulating layer, resulting in liquid infiltration of the neutral point terminal.

[0006] In order to solve the above problems, the present invention provides a lead wire fixing structure, including: a fixing member, which is installed on the end cover of an electrical appliance, a winding is arranged on the stator of the electrical appliance, the winding has a neutral point and a lead wire, the lead wire is used to be connected to a power supply, and the neutral point and the lead wire are arranged on the fixing member.

[0007] In some embodiments, the fixing member is provided with a first groove, a second groove and a third groove, the first groove, the second groove and the third groove are arranged at intervals, the lead wire has a first lead, a second lead and a third lead, the first lead is inserted in the first groove, the second lead is inserted in the second groove, and the third lead is inserted in the third groove, and three connecting holes are provided on the fixing member, and the first groove, the second groove and the third groove are provided with connecting holes, and the connecting holes pass through the fixing member.

[0008] In some embodiments, the circumference of the connection hole is perpendicular to the plugging direction of the lead wire, and there is a minimum distance d between two adjacent connection holes, and the minimum distance d is greater than 9.3 mm.

[0009] In some embodiments, a fourth groove is provided on the fixing member, the fourth groove is spaced apart from the first groove, the second groove, and the third groove, and the neutral point is inserted into the fourth groove.

[0010] In some embodiments, the first groove, the second groove, and the third groove are provided with piercing terminals; the fourth groove is provided with the piercing terminal, or the neutral point is welded in the fourth groove.

[0011] In some embodiments, along the plugging direction of the neutral point, first protrusions are provided on the inner walls on two opposite sides of the fourth groove, and there is a gap between the two first protrusions.

[0012] In some embodiments, a first protrusion is disposed on the inner wall of the first groove, the second groove, and the third groove, and a gap exists between the first protrusion and the bottom of the first groove, the second groove, and the third groove.

[0013] In some embodiments, through holes are provided on the bottoms of the first groove, the second groove, and the third groove, and the through holes penetrate the fixing member.

[0014] The present invention also provides a motor, which comprises the above-mentioned lead wire fixing structure.

[0015] The present invention also provides a compressor, which comprises the above-mentioned lead wire fixing structure.

[0016] The lead wire fixing structure, motor and compressor provided by the present invention have the following beneficial effects:

[0017] When the lead wire fixing structure of the present invention is applied to a compressor, by arranging the neutral point and the lead wire on the fixing member, the neutral point can be fixed under the premise of ensuring the fixing function of the existing lead wire terminal. After the fixing member is connected to the compressor upper cover terminal, the neutral point is synchronously raised to a theoretically highest position inside the compressor, thereby preventing poor insulation caused by the neutral point being immersed when the liquid level inside the compressor is too high. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0019] Figure 1 It is a structural schematic diagram of a compressor of the prior art;

[0020] Figure 2 It is a structural schematic diagram of a stator in a compressor in the prior art;

[0021] Figure 3 This is the Y-type wiring diagram of the motor winding;

[0022] Figure 4 It is a structural schematic diagram of the lead-out wire fixing structure of the present invention;

[0023] Figure 5 It is an assembly structure diagram of the lead wire in the lead wire fixing structure of the present invention;

[0024] Figure 6 The structure of the fixing member in the lead-out wire fixing structure of the present invention is schematically shown. Figure 1 ;

[0025] Figure 7 The structure of the fixing member in the lead-out wire fixing structure of the present invention is schematically shown. Figure 2 ;

[0026] Figure 8 The structure of the fixing member in the lead-out wire fixing structure of the present invention is schematically shown. Figure 3 ;

[0027] Fig. 9 The structure of the fixing member in the lead-out wire fixing structure of the present invention is schematically shown. Figure 4 ;

[0028] Fig.10The structure of the fixing member in the lead-out wire fixing structure of the present invention is schematically shown. Figure 5 ;

[0029] Fig.11 The structure of the fixing member in the lead-out wire fixing structure of the present invention is schematically shown. Figure 6 ;

[0030] Fig.12 The structure of the fixing member in the lead-out wire fixing structure of the present invention is schematically shown. Figure 7 ;

[0031] Fig.13 is a structural schematic diagram of a stator in a motor according to another embodiment of the present invention;

[0032] Fig.14 is a schematic structural diagram of a skeleton in a motor according to another embodiment of the present invention;

[0033] Fig.15 It is a structural schematic diagram of the lead wire fixing structure of the second embodiment of the present invention;.

[0034] The accompanying drawings are marked as follows:

[0035] 1. Rotor; 2. Stator; 3. Neutral point; 4. Winding; 5. Fixing piece; 6. Skeleton; 7. Fifth groove; 8. Third protrusion; 9. Second extension line; 10. First extension line; 11. Lead-out terminal; 12. First groove; 13. Second groove; 14. Third groove; 15. Fourth groove; 16. Connecting hole; 17. First protrusion; 18. Second protrusion; 19. Through hole; 20. Neutral line terminal. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0038] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0039] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0040] See also Figure 1-15 As shown, according to an embodiment of the present invention, a lead-out wire fixing structure is provided, comprising: a fixing member 5, the fixing member 5 is mounted on the end cover of an electrical appliance, a winding 4 is arranged on the stator 2 of the electrical appliance, the winding 4 has a neutral point 3 and a lead-out wire, the lead-out wire is used to connect to a power source, and the neutral point 3 and the lead-out wire are arranged on the fixing member 5. In this technical solution, the electrical appliance is a compressor or a motor, and of course, it can also be other electrical appliances with a lead-out wire structure. When the lead-out wire fixing structure of the present invention is applied to a compressor, by arranging the neutral point 3 and the lead-out wire on the fixing member 5, the neutral point can be fixed under the premise of ensuring the fixing function of the existing lead-out wire terminal. After the fixing member 5 is connected to the terminal of the upper cover of the compressor, the neutral point is synchronously raised to a height that is at the theoretical highest position inside the compressor, thereby preventing the poor insulation problem caused by the immersion of the neutral point when the liquid level inside the compressor is too high.

[0041] In some embodiments, the fixing member 5 is provided with a first groove 12, a second groove 13 and a third groove 14, the first groove 12, the second groove 13 and the third groove 14 are arranged at intervals, the lead wire has a first lead, a second lead and a third lead, the first lead is inserted in the first groove 12, the second lead is inserted in the second groove 13, and the third lead is inserted in the third groove 14, and three connecting holes 16 are provided on the fixing member 5, the first groove 12, the second groove 13 and the third groove 14 are provided with connecting holes 16, and the connecting holes 16 pass through the fixing member 5. In this technical solution, the fixing member 5 has an upper end face, a side face and a lower end face, the first groove 12, the second groove 13 and the third groove 14 are arranged on the side face of the fixing member 5, and the connecting hole 16 is arranged on the upper end face of the fixing member 5. Through the connecting hole 16, when the lead-out wire has a first lead, a second lead and a third lead installed in the first groove 12, the second groove 13 and the third groove 14, the terminal is connected to the lead-out wire through the connecting hole.

[0042] In the prior art, the stator 2 includes a stator core formed by stacking non-oriented silicon steel punching sheets, slot insulation composed of polyester film lining the stator slot, a first insulating frame, a second insulating frame, and windings and additional structures of the windings. Among them, the first extension wire 10 and the second extension wire 9 are extended from the winding body of each phase, and the first extension wire is aggregated on the first insulating frame according to the phase. The outer side of the aggregated extension wire group of each phase is wrapped with an insulating sleeve or equivalent additional insulation measures to prevent possible problems such as short circuit caused by insulation damage on the surface of the extension wire conductor, and the lead wire terminal is pierced and connected, and an insulating plastic shell with three mutually independent insulated terminal wrapping cavities is included to form a lead wire assembly. The above-mentioned lead wire assembly is located on the first insulating frame side of the stator assembly, and is fixed to the first frame fixed structure at the aggregation of the first extension wires of each phase, ensuring that the lead wire assembly is not displaced during the operation of the motor and the compressor to prevent possible scratches and other damages to the lead wire.

[0043] The stator also includes a neutral point 3, which is gathered by the second extension wires of each winding, and is pierced and conducted by the terminal to become an equipotential point, or is directly welded by each extension wire. In some technical solutions, the neutral point and the lead wire assembly are at the same end of the stator assembly, and in some solutions, the neutral point is on the opposite side of the lead wire assembly. If the neutral point is placed on the insulating skeleton, there will be a corresponding neutral point terminal slot on the insulating skeleton; if the neutral point is placed on the stator winding or in the winding gap, a sleeve with one end opened by multiple layers of insulating film will be added to the surface to prevent the possible sharp corners or burrs of the neutral point from damaging the winding insulation layer and causing electrical safety problems; the above two solutions do not take sealing measures for the neutral point conductor. Once the neutral point contacts the liquid inside the compressor, a large additional leakage current will be generated, resulting in excessive leakage current. In some solutions, this sleeve is replaced with a heat-shrinkable sleeve that can be heated and shrunk, in order to reduce the gap between the sleeve and the neutral point and at the same time dip the neutral point or the entire stator into varnish, so as to reduce the amount of exposed conductor at the neutral point that contacts the liquid inside the compressor and thus reduce the increased leakage current. However, since the neutral point is a multi-wire structure and is not uniformly symmetrical, the heat-shrink sleeve + varnishing cannot achieve a complete sealing effect. On the contrary, it increases the capillary effect of the liquid to a certain extent, which makes it easy for liquid to accumulate in the sleeve. The leakage current increment caused by the exposed conductor at the neutral point contacting the liquid inside the compressor is limited in effect, and is not feasible for application scenarios with high requirements for leakage current.

[0044] In some embodiments, the circumference of the connection hole 16 is perpendicular to the plugging direction of the lead wire, and there is a minimum distance d between two adjacent connection holes 16, and the minimum distance d is greater than 9.3 mm. In this technical solution, by having a minimum distance d between two adjacent connection holes 16, and the minimum distance d is greater than 9.3 mm, sufficient electrical safety clearance between the terminals is ensured.

[0045] In the following embodiments, the first groove 12, the second groove 13, and the third groove 14 are collectively referred to as lead-out grooves, and each lead-out groove has a terminal connection hole 16 on its side, the connection hole 16 is perpendicular to the direction in which the lead-out terminal 11 is inserted into the lead-out groove, and is directly opposite to the center of the terminal plug-in structure of the lead-out terminal 11, and the diameters of the plurality of terminal connection holes 16 are larger than the diameter of the terminal rod, and the gap is 0.05 to 0.15 times the maximum outer diameter of the terminal, so as to ensure that the terminal rod is more easily aligned with the terminal and inserted;

[0046] Multiple lead-out wire grooves are connected in parallel along the insertion direction of the lead-out wire terminals, or are directly molded into one piece by injection molding to form a fixing part 5. Multiple terminal connection holes 16 are located on the wall surface where they are flush with each other, and the connection holes 16 are located on the same side to ensure that the compressor terminals are plugged in place synchronously. Multiple lead-out wire grooves have insulating walls to ensure that multiple lead-out wire terminals are insulated from each other in the fixing part 5. The gap d between the adjacent edges of the multiple connection holes 16 is greater than 9.3 mm to ensure sufficient electrical safety gap between the terminals.

[0047] During installation, the lead wires are brought together with the center point 3, and an insulating sleeve or the like can be used to ensure mutual insulation between the lead wires and the center point 3, so as to reduce the space inside the compressor shell occupied by the wiring harness groups connected to the lead wire plastic shell after installation, thereby reducing the required safety distance between the wiring harness and the inner wall of the compressor shell and rotating parts.

[0048] The neutral point 3 harness fixing structure can be a single "T" type structure that fixes both the lead wire harness and the neutral point harness as described in 5-12, or it can be a fixing structure adjacent to the lead wire harness fixing structure, that is, near the point where the neutral point harness and the lead wire harness converge on the first insulating frame, multiple "T" type fixing mechanisms can be set according to actual needs, such as thick wire diameter, insufficient strength or space of a single fixing structure, or it can be a "Γ" type, "Π" type, etc., which can be used for the above harness to be wound, tied or inserted. As mentioned above, if multiple harness fixing structures are set, the structural types can be the same or different.

[0049] In some embodiments, the fixing member 5 is provided with a fourth groove 15, and the fourth groove 15 is arranged at intervals with the first groove 12, the second groove 13, and the third groove 14, and the neutral point 3 is plugged into the third groove 14. In this technical solution, the fourth groove 15 is arranged on the lower end surface of the fixing member 5, and one side of the fourth groove 15 penetrates any side wall of the fixing member 5. Preferably, one side of the fourth groove 15 penetrates the side wall of the fixing member 5, the opening of the first groove 12, the opening of the second groove 13, and the opening of the third groove 14 are located on the same side of the fixing member 5, which is convenient for the installation of the lead-out wire and the neutral point 3. The fourth groove 15 is arranged at intervals with the first groove 12, the second groove 13, and the third groove 14, which ensures the insulation between the lead-out wire and the neutral point 3 and improves the safety of the electrical appliance.

[0050] In some embodiments, the first groove 12, the second groove 13, and the third groove 14 are provided with piercing terminals; the fourth groove 15 is provided with the piercing terminal, or the neutral point 3 is welded in the fourth groove 15. In this technical solution, the lead wire adopts a piercing terminal, and the neutral point adopts a piercing terminal or welding conduction to facilitate the electrical connection between the lead wire and the terminal. During installation, each lead wire of the lead wire is provided with a lead wire terminal 11, and the neutral point 3 is provided with a neutral point terminal 20.

[0051] In some embodiments, along the insertion direction of the neutral point 3, first protrusions 17 are provided on the inner walls on both sides opposite to each other of the fourth groove 15, and a gap is provided between the two first protrusions 17. In this technical solution, by providing the first protrusions 17 on the inner walls on both sides opposite to each other of the fourth groove 15, a gap is provided between the two first protrusions 17. A snap-fit ​​structure is formed between the two first protrusions 17 and the fourth groove, which is used to fix the neutral point 3 and prevent the neutral point 3 from moving from the fourth groove 15.

[0052] The buckle structure formed between the two first protrusions 17 and the fourth groove is specifically, including a first protrusion 17 connected to the side wall of the fourth groove 15, symmetrically or oppositely arranged with respect to the symmetry plane of the fourth groove 15; the protrusion height of the first protrusion 17 relative to the side wall of the fourth groove 15 is 0.5 to 2 times the distance between the two side walls of the fourth groove 15; and the projection of the two symmetrically arranged first protrusions 17 on the bottom surface of the fourth groove 15 has a gap, and the distance is 0.6 to 0.8 times the conductor width; the length of the first protrusion 17 along the side direction of the fourth groove 15 is 0.8 to 1.5 times the neutral point 3 exposed conductor length; and there is a gap of more than 2 times the thickness of the side wall between the first protrusion 17 and the remaining wall surface outside the side wall of the fourth groove 15, so as to ensure that the side wall will not crack due to excessive bending when the neutral point conductor enters the fourth groove 15 from the symmetrically arranged first protrusion 17; further, in order to ensure that the neutral point conductor is easy to press into the fourth groove 15 before being installed and is not easy to vibrate after installation, on any plane perpendicular to the side, the projection profile of the cross section of the first protrusion 17 has the following characteristics: a side projection line close to the neutral point conductor and a side projection line away from the neutral point conductor are respectively at obtuse angles to the side projection line.

[0053] In some embodiments, a first protrusion 17 is provided on the inner wall of the first groove 12, the second groove 13, and the third groove 14, and there is a gap between the first protrusion 17 and the bottom of the first groove 12, the second groove 13, and the third groove 14. In this technical solution, when the lead wire is inserted into the groove, the first protrusion 17 cooperates with the elastic spring on the lead wire terminal of the lead wire to form a locking structure to prevent the lead wire from backing out of the groove.

[0054] The lead wire fixing structure of the present invention comprises a rotor 1 sleeved inside a stator 2, wherein the stator 2 comprises a stator core formed by stacking non-oriented silicon steel punching sheets, slot insulation composed of a polyester film placed in slots of the stator core, a first and a second insulating frame placed at both ends of the stator assembly, windings on each stator tooth, and a lead wire assembly and a neutral point 3 composed of a first extension wire 10 of the winding, a second extension wire 9 and additional parts thereof.

[0055] The lead wire assembly is composed of the first extension wires 10 extending from each phase winding, which are bundled according to phase and fixed on the outer wall of the first insulating frame. The bundled first extension wires 10 of each phase are additionally insulated, such as insulating sleeves, to prevent phase-to-phase short circuits or sparks caused by possible damage to the insulation layer of the extension wire conductor.

[0056] The second extension line 9 passes through the preset fifth groove 7 and the corresponding buckle or third boss 8 on the outer wall of the first insulating skeleton 6 to form a wire passage, which is gathered to the preset neutral point 3 wire harness fixing structure on the first insulating skeleton 6, and further extends to the fixing part 5. The exposed conductor part of the neutral point 3 is directly placed in the fourth groove 15 of the fixing part 5, and the locking buckle of the fourth groove 15 is used to clamp the neutral point to prevent it from loosening from the lead-out wire plastic shell.

[0057] The fixing member 5 also has a plurality of lead-out wire grooves for fixing the lead-out wire terminal 11. The lead-out wire groove is a tubular cavity structure, and the cavity has a cross-sectional profile that can accommodate the lead-out wire terminal 11 to be inserted. The cross-section matches the terminal cross-section to ensure that the terminal can only be inserted into the cavity at a unique angle. At the same time, the cavity also has a snap formed by a first protrusion 17 along the terminal insertion direction. The snap cooperates with the elastic spring on the lead-out wire terminal 11 to form a locking structure to prevent the lead-out wire terminal 11 from backing out of the lead-out wire groove. At the same time, the lead-out wire groove also has a wall that separates the cavity at its end along the terminal insertion direction. The wall and the aforementioned locking buckle structure jointly limit the terminal to a roughly fixed depth in the cavity to prevent vibration and abnormal noise during the operation of the compressor. At the same time, in order to facilitate observation of whether the lead-out wire terminal is installed in place after being inserted into the first groove, the wall of the partition cavity has a through hole 19 along the lead-out wire terminal insertion direction. The through hole 19 can be used to observe whether the terminal tail and the elastic spring are installed in place.

[0058] In some embodiments, a through hole 19 is provided on the bottom of the first groove 12, the second groove 13, and the third groove 14, and the through hole 19 passes through the fixing member 5. In this technical solution, through the through hole 19, it can be observed whether the lead wire is plugged into the groove.

[0059] The lead-out wire fixing structure of the present invention solves the problem of excessive leakage current caused by neutral point leakage of a "Y" type wiring compressor motor when the motor is submerged in the internal liquid level; and solves the problem of low production efficiency and inability to completely solve the leakage current problem of the neutral point terminal of the existing "heat shrink tubing + varnish dipping" solution;

[0060] The lead wire fixing structure of the present invention also has a neutral point fixing structure, which can ensure the neutral point fixing function of the existing lead wire terminal. After the lead wire terminal plastic shell is connected to the upper cover terminal, the neutral point is synchronously raised to the highest theoretical position inside the compressor, preventing the poor insulation caused by the neutral point being immersed when the liquid level inside the compressor is too high. The neutral point is fixed by a simple terminal plug-in method, which is simple to operate and has high production efficiency.

[0061] The present invention also provides a motor, comprising the above-mentioned lead wire fixing structure.

[0062] The motor of the present invention comprises a rotor and a stator. The stator comprises an iron core including a tooth portion carrying a winding, an insulating structure and a winding wound on the tooth portion with a "Y" type connection. The winding comprises a neutral point 3 of the "Y" type connection and a lead wire connected to a power source. The neutral point and the lead wire are insulated from each other and fixed in the same fixing member 5. The fixing member 5 is directly connected to a compressor terminal so that the motor is connected to the compressor terminal through the lead wire for electrical conduction.

[0063] The fixing member 5 is provided with a lead-out wire groove and a fourth groove 15, the lead-out wire groove has a fixing structure for fixing the lead-out wire terminal and a fixing structure for fixing the terminal pin, the fourth groove 15 has a fixing structure for fixing the neutral point, and an isolation portion is provided between the lead-out wire groove and the fourth groove 15 to prevent the neutral point and the lead-out wire terminal from being connected to each other;

[0064] The fixing member 5 has a connection hole 16 connected to the terminal pin of the terminal post, the direction of the connection hole 16 corresponds to the plug-in part after the lead-out terminal is fixed to the fixing member 5 and is perpendicular to the plug-in direction, and the positions of the plurality of connection holes 16 satisfy that the minimum distance d between any two holes is greater than 9.5 mm;

[0065] The lead wire adopts a piercing terminal, and the neutral point adopts a piercing terminal or welding conduction. The terminals have a locking structure to prevent them from coming out of the plastic shell, and the lead wire plastic shell has a corresponding locking buckle;

[0066] The fixing member 5 is made of engineering plastic material and is formed as an integral part or in blocks;

[0067] The stator 2 also has an insulating frame 6 disposed on both axial end surfaces of the stator core, and the two insulating frames have the same or different structures;

[0068] The conductor line of the neutral point 3 of the motor stator is extended from the second extension line 9 of the winding body to the outer wall of the insulating frame, and is separated from or contacted to be gathered to the fixing part 5 preset on the frame, and the lead wires are separated from each other along the outer wall of the frame by the first extension line 10 of the winding body to be gathered to the fixing part 5 on the frame, and are riveted to the lead wire terminals in phases, and the lead wire bundles of each phase are insulated from each other;

[0069] The first and second extension lines are extended on the outer wall of the insulating frame at intervals from each other, and the interval d1 needs to meet the following range: d1 ≥ 2.5 mm;

[0070] The present invention also provides a compressor, comprising the above-mentioned lead wire fixing structure.

[0071] In the compressor of the present invention, the side wall of the fixing member 5 opposite to the terminal connection hole 16 has a fourth groove 15, and the neutral point lock opening of the fourth groove 15 is located opposite to the surface where the connection hole 16 is located, so as to reduce the required installation area of ​​the lead wire plastic shell on the housing where the compressor terminal is located. There is a mutually insulated wall between the fourth groove 15 and the lead wire slot to ensure that the neutral point terminal or the welding point is not connected to the lead wire terminal.

[0072] The lead-out wire slot and the fourth groove 15 of the fixing member 5 are integrally injection molded or assembled as separate units. The materials used are materials with electrical, fluorine-resistant, insulation grade and mechanical properties that meet the requirements of air-conditioning refrigeration compressors, preferably engineering plastics such as PBT, PPS and LCP.

[0073] In the compressor of the present invention, the neutral point of the compressor motor with Y-type wiring is raised to the uppermost end of the motor. After being assembled inside the compressor, it is located in the area inside the compressor that is theoretically farthest from the liquid surface, so that the exposed conductor of the neutral point is far away from the liquid level inside the compressor, and the leakage current caused by the neutral point terminal contacting the liquid inside the compressor is eliminated, thereby solving the problem of excessive leakage current caused by the neutral point in the prior art. It is only necessary to appropriately extend the second extension line to reach the vicinity of the fixing member 5, and fix the neutral point through the neutral point fixing cavity added in the fixing member 5, thereby solving the problem of low production efficiency of the "heat shrink tubing + varnish dipping" solution. In addition, since the fourth groove 15 has an open structure and is located opposite to the plane where the terminal connection hole 16 is located, after the lead-out line and the compressor terminal are installed, the opening of the second groove has a downward position relative to the upper cover of the compressor, so that no liquid will be formed, further reducing the problem of increased leakage current of the exposed conductor of the neutral point caused by liquid accumulation in the prior art.

[0074] In the process of the first extension line 10 and the second extension line 9 being gathered from the winding body to the fixed point, additional insulation measures other than the original insulation layer can be added to the conductor surface, such as adding a sleeve, so that the third figure 8 and the fifth grooves 7 of different depths for distinguishing the extension lines of each phase do not need to be provided on the outer side of the first wall of the insulation frame, thereby simplifying the frame structure. However, the additional insulation layer will increase the number of steps in the process of gathering the extension lines, and increase the amount of insulation material, thereby increasing the cost of the motor;

[0075] In some embodiments, the fourth groove 15 added to the fixing member 5 is used to fix the exposed conductor of the neutral point. This structure can also be processed separately from the fixing member 5 body, and after being combined with the exposed conductor of the neutral point, it is installed as a whole with the lead-out wire plastic shell through a preset docking structure;

[0076] In some embodiments, the center point wiring harness extending to the vicinity of the fixing member 5 is fixed to the lead-out wire harness by binding or similar means to ensure that the neutral point bare conductor is close to the fixing member 5, so that the neutral point bare conductor is in the theoretical highest position area inside the compressor, and in order to ensure that the neutral point bare conductor part is close to the lead-out wire plastic shell, the neutral point wiring harness needs to be tied until it is close to the lower part of the lead-out wire plastic shell.

[0077] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A lead wire fixing structure, characterized in that: include: A fixing member (5) is mounted on an end cover of an electrical appliance. A winding (4) is arranged on a stator (2) of the electrical appliance. The winding (4) has a neutral point (3) and a lead wire. The lead wire is used to connect to a power source. The neutral point (3) and the lead wire are arranged on the fixing member (5).

2. The lead-out wire fixing structure according to claim 1, characterized in that: The fixing member (5) is provided with a first groove (12), a second groove (13) and a third groove (14); the first groove (12), the second groove (13) and the third groove (14) are arranged at intervals; the lead wire comprises a first lead wire, a second lead wire and a third lead wire; the first lead wire is plugged into the first groove (12); the second lead wire is plugged into the second groove (13); the third lead wire is plugged into the third groove (14); the fixing member (5) is provided with three connection holes (16); the first groove (12), the second groove (13) and the third groove (14) are provided with connection holes (16); the connection holes (16) pass through the fixing member (5).

3. The lead-out wire fixing structure according to claim 2, characterized in that: The circumference of the connection hole (16) is perpendicular to the plugging direction of the lead-out wire, and there is a minimum distance d between two adjacent connection holes (16), and the minimum distance d is greater than 9.3 mm.

4. The lead-out wire fixing structure according to claim 2, characterized in that: The fixing member (5) is provided with a fourth groove (15), the fourth groove (15) is arranged at intervals from the first groove (12), the second groove (13), and the third groove (14), and the neutral point (3) is inserted into the fourth groove (15).

5. The lead-out wire fixing structure according to claim 4, characterized in that: The first groove (12), the second groove (13), and the third groove (14) are provided with piercing terminals; the fourth groove (15) is provided with the piercing terminal, or the neutral point (3) is welded in the fourth groove (15).

6. The lead-out wire fixing structure according to claim 4, characterized in that: Along the plugging direction of the neutral point (3), first protrusions (17) are provided on the inner walls of the fourth groove (15) on both sides opposite to each other, and a gap is provided between the two first protrusions (17).

7. The lead-out wire fixing structure according to claim 4, characterized in that: A first protrusion (17) is provided on the inner walls of the first groove (12), the second groove (13) and the third groove (14), and a gap exists between the first protrusion (17) and the bottoms of the first groove (12), the second groove (13) and the third groove (14).

8. The lead-out wire fixing structure according to claim 4, characterized in that: A through hole (19) is provided on the bottom of the first groove (12), the second groove (13) and the third groove (14), and the through hole (19) passes through the fixing member (5).

9. A motor, characterized in that: The invention comprises the lead wire fixing structure according to any one of claims 1 to 8.

10. A compressor, characterized by comprising the lead wire fixing structure according to any one of claims 1 to 8.

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