Plastic package motor of air conditioner

Abstract

The invention discloses an air conditioner plastic package motor, and belongs to the technical field of air conditioner motors, the air conditioner plastic package motor comprises a machine body, a detection part is arranged inside and outside the machine body, the detection part comprises conducting strips in extrusion contact with the upper side and the lower side of a bearing, the back sides of the conducting strips are fixedly connected with connecting rings, and the lower sides of the connecting rings are fixedly connected with wiring pieces; static electricity or current accumulated in the machine body is led out through the arranged conducting strip, meanwhile, the state of the conducting strip is detected in real time, and due to the fact that the conducting strip located on the outer side of the bearing can guide the static electricity or current accumulated in the machine body, the static electricity or current accumulated in the machine body can be detected in real time; the static electricity or current is prevented from generating sparks after passing through a lubricating oil film at the contact part of a raceway wheel and a rolling body of the rotating bearing, so that local fusion and concave-convex phenomena on the surface of the bearing are prevented, and meanwhile, the conducting strip can be detected, so that the state of the conducting strip can be detected in real time.

Description

Technical Field

[0001] The present invention relates to the field of air-conditioning motors, and more particularly to a plastic-sealed air-conditioning motor. Background Art

[0002] A plastic-encapsulated motor is a motor that uses plastic packaging technology to encapsulate the motor's stator core, winding, etc. with engineering plastics as a whole. It is mainly composed of a plastic-encapsulated stator, shaft, rotor, bearings, end covers, thermal protectors, lead wires, sockets, etc. Air conditioner plastic-encapsulated motors are mainly used to drive fans (such as cross-flow fans or centrifugal fans in indoor units, and axial-flow fans in outdoor units) to rotate, thereby generating airflow to achieve air circulation and cooling / heating effects.

[0003] The bearings inside an air conditioner's plastic-encapsulated motor are extremely important. They primarily support rotating components (such as the rotor and fan blades) in these motors, ensuring smooth and stable rotation. This support is essential for the proper operation of the air conditioner motor. Bearings significantly reduce friction between the rotating components and the fixed parts, thereby reducing energy consumption and improving energy efficiency. This is crucial for extending the lifespan of air conditioners and lowering operating costs. However, static electricity buildup, improper current circuits, and lubricant issues can all contribute to bearing corrosion. In the existing technology, the anti-electrolytic corrosion method used in plastic-encapsulated motors is mainly to stick conductive tape on the front and rear end covers of the plastic-encapsulated shell, but the bearings are not in direct contact with the conductive tape. The current entering the plastic-encapsulated motor will still pass through the lubricating oil film in the contact part of the raceway wheel and the rolling element of the rotating bearing, thereby generating sparks and causing local melting and unevenness on the bearing surface. Summary of the Invention

[0004] In view of the problem in the prior art that the current entering the interior of the plastic-encapsulated motor will still pass through the lubricating oil film in the contact part between the raceway wheel and the rolling element of the rotating bearing, thereby generating sparks and causing local melting and unevenness on the bearing surface, the purpose of the present invention is to provide a plastic-encapsulated motor for air conditioners.

[0005] To solve the above problems, the present invention adopts the following technical solution, which can lead out the static electricity or current accumulated inside the body, and at the same time detect the status of the conductive sheet, so as to facilitate real-time detection of the status of the conductive sheet.

[0006] A plastic-sealed motor for an air conditioner comprises a body and a bearing arranged inside the body, wherein a rotor is rotatably connected to the inside of the body, the bearing is sleeved on the outside of the rotor, a cavity is opened on the internal front side of the body, the bearing is located inside the cavity, and a detection component is provided on both the inside and outside of the body; the detection component comprises a conductive sheet that is pressed and contacted on the upper and lower sides of the bearing, a connecting ring is fixedly connected to the back side of the conductive sheet, the connecting ring is sleeved on the outside of the bearing, a wiring member is fixedly connected to the lower side of the connecting ring, a first electric push rod is fixedly connected to the left and right sides of the internal front end of the cavity, a movable ring is fixedly connected to the telescopic end of the first electric push rod, the movable ring is slidingly sleeved on the outside of the bearing and the conductive sheet, movable grooves are opened on the upper and lower sides of the interior of the movable ring, and an eddy current sensor is provided inside the movable groove.

[0007] Furthermore, the movable groove is slidably sleeved on the outside of the conductive sheet, the other end of the wiring member is electrically connected to an external grounding device, and the eddy current sensor and the first electric push rod are both electrically connected to an external power supply.

[0008] Furthermore, the shape of the interior of the movable ring is adapted to the shape of the exterior of the bearing, and the diameter of the connecting ring is larger than the diameter of the bearing.

[0009] Furthermore, a replacement component is provided inside the body, and the replacement component includes a moving groove opened inside the body.

[0010] Furthermore, the movable groove is communicated with the cavity, and a connecting plate is slidably connected to the inside of the movable groove. The front side of the connecting plate is fixedly connected to the back side of the connecting ring. A second electric push rod is provided on the lower side of the inner part of the movable groove, and the telescopic end of the second electric push rod is fixedly connected to the lower side of the connecting plate. An embedding groove is provided on the lower side of the inner part of the body, and the wiring member retracts into the embedded groove after moving downward.

[0011] Furthermore, only one of the two conductive sheets is in squeeze contact with the outer surface of the bearing at a time, and the conductive sheet on the upper side moves downward and is in squeeze contact with the outer side of the bearing. The connecting plate and the connecting ring are both made of insulating material, and the wiring member is wrapped inside the connecting ring and fixedly connected to the two conductive sheets.

[0012] Furthermore, the inner and outer sides of the body are both provided with warning components, and the warning component includes a controller arranged on the front side of the body.

[0013] Furthermore, a warning device is provided on the front side of the controller, and the warning device is mainly composed of a warning light and a whistle, and the eddy current sensor is electrically connected to the controller.

[0014] Furthermore, a heat dissipation component is provided on both the inner and outer sides of the machine body, and the heat dissipation component includes a fan blade fixedly connected to the outer side of the rotor.

[0015] Furthermore, the movable ring is arranged on the outside of the fan blade, and the surface of the body is provided with heat dissipation grooves arranged in a ring array, the heat dissipation grooves are connected to the cavity, and dustproof nets are arranged in parallel inside the heat dissipation grooves.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention uses a conductive sheet to draw out the static electricity or current accumulated inside the body, and at the same time, detects the status of the conductive sheet in real time. Since the conductive sheet located outside the bearing can guide the static electricity or current accumulated inside the body, it prevents the static electricity or current from generating sparks after passing through the lubricating oil film of the contact part between the raceway wheel and the rolling element of the rotating bearing, thereby preventing local melting and unevenness on the bearing surface. At the same time, the conductive sheet can be detected to facilitate real-time detection of the status of the conductive sheet.

[0017] (2) The present invention adjusts the position of the connecting ring by means of a connecting plate, thereby quickly replacing the conductive sheet. Since the conductive sheet can be quickly replaced during the up and down movement of the connecting ring, the conductive sheet can be quickly replaced after one of the conductive sheets fails, thereby ensuring the efficiency of the conductive sheet in guiding static electricity and current inside the machine body.

[0018] (3) The present invention sets an alarm that starts after the conductive sheet fails, and the alarm is always in the on state after all the conductive sheets fail. When the eddy current sensor detects burn marks or dents on the surface of the conductive sheet, the alarm will alert the staff. When the alarm remains in the on state for a long time, it means that all the conductive sheets have failed, thereby reminding the staff to repair or replace them in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic cross-sectional view of the present invention; Figure 3 It is a schematic cross-sectional structural diagram of the body of the present invention; Figure 4 It is a partial enlarged schematic diagram of the body of the present invention; Figure 5 Schematic diagram of the cross-sectional structure of the embedding groove of the present invention; Figure 6 It is a structural schematic diagram of the mobile ring of the present invention; Figure 7 It is a structural schematic diagram of the movable groove of the present invention; Figure 8 It is a schematic structural diagram of the fan blade of the present invention.

[0020] Description of the numbers in the figure: 1. Body; 11. Bearing; 12. Rotor; 13. Cavity; 2. Detection component; 21. Conductive sheet; 22. Connecting ring; 23. Wiring piece; 24. First electric push rod; 25. Moving ring; 26. Movable slot; 27. Eddy-current sensor; 28. Replacement component; 281. Moving slot; 282. Connecting plate; 283. Second electric push rod; 284. Embedded slot; 29. ​​Warning component; 291. Controller; 292. Warning device; 3. Heat dissipation component; 31. Fan blade; 32. Heat dissipation slot; 33. Dust screen. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] See also Figures 1 to 8 A plastic-encapsulated motor for an air conditioner includes a body 1 and a bearing 11 disposed inside the body 1. A rotor 12 is rotatably connected to the inside of the body 1. The bearing 11 is sleeved on the outside of the rotor 12. A cavity 13 is formed on the front side of the inside of the body 1. The bearing 11 is located inside the cavity 13. A detection component 2 is provided on both the inside and outside of the body 1. The detection component 2 includes a conductive sheet 21 that is squeezed and contacted on the upper and lower sides of the bearing 11. The back side of the conductive sheet 21 is fixedly connected to a connecting ring 22, which is sleeved on the outside of the bearing 11. The lower side of the connecting ring 22 is fixedly connected to a wiring member 23. The left and right sides of the internal front end of the cavity 13 are fixedly connected to a first electric push rod 24, and the telescopic end of the first electric push rod 24 is fixedly connected to a moving ring 25. The moving ring 25 is slidably sleeved on the outside of the bearing 11 and the conductive sheet 21. Movable grooves 26 are provided on the upper and lower sides of the interior of the moving ring 25, and an eddy current sensor 27 is provided inside the movable groove 26.

[0023] The movable groove 26 is slidably sleeved on the outer side of the conductive sheet 21 . The other end of the connecting piece 23 is electrically connected to an external grounding device. The eddy current sensor 27 and the first electric push rod 24 are both electrically connected to an external power supply.

[0024] The shape of the interior of the moving ring 25 matches the shape of the exterior of the bearing 11 , and the diameter of the connecting ring 22 is larger than the diameter of the bearing 11 .

[0025] By adopting the above technical solution, during the operation of the machine body 1, the rotor 12 passing through the bearing 11 starts to rotate. During this process, the conductive sheet 21 at the bottom is always in contact with the lower side of the bearing 11. If static electricity accumulates inside the machine body 1 or current passes through, the conductive sheet 21 is equivalent to providing a bypass for the shaft current, so that the current can bypass the bearing 11. Specifically, the conductive sheet 21 can serve as a low-impedance path so that the shaft current can flow through this path instead of through the bearing 11. This can effectively reduce the current density on the bearing 11, thereby reducing the current passing through the bearing 11 and reducing the occurrence of electro-corrosion. The connecting ring 22 for connecting the conductive sheet 21 is made of insulating material and is sleeved on the outside of the terminal 23 connected to the conductive sheet 21. The current guided by the conductive sheet 21 will pass through the terminal 23. The current is transmitted to the external grounding device and discharged from the body 1. When the surface of the conductive sheet 21 needs to be inspected, the first electric push rod 24 is started to push the movable ring 25. As the movable ring 25 is sleeved on the outside of the bearing 11, the movable groove 26 opened on the inner surface of the movable ring 25 will surround the outside of the conductive sheet 21, and the eddy current sensor 27 inside the movable groove 26 will contact the surface of the conductive sheet 21. The working principle of the eddy current sensor 27 is based on the eddy current effect of a metal conductor in a magnetic field. When there is a burn mark on the surface of the metal sheet, its conductive properties and magnetic properties will change, thereby affecting the size and distribution of the eddy current. By detecting this change, it is determined whether there are burn marks and depressions on the surface of the metal sheet. If burn marks and depressions are detected on the surface of the conductive sheet 21, the first electric push rod 24 will stop running immediately. It should be noted that, since the diameter of the connecting ring 22 is larger than the diameter of the bearing 11, and the connecting ring 22 is sleeved on the outside of the bearing 11, when the conductive sheet 21 located below contacts the outside of the bearing 11, the conductive sheet 21 located above will be away from the bearing 11. Since the conductive sheet 21 located on the outside of the bearing 11 can guide the static electricity or current accumulated inside the body 1, it can avoid static electricity or current from generating sparks after passing through the lubricating oil film of the contact part between the raceway wheel and the rolling element of the rotating bearing 11, thereby preventing local melting and bumps on the surface of the bearing 11. At the same time, the conductive sheet 21 can be detected to facilitate real-time detection of the status of the conductive sheet 21.

[0026] like Figures 2 to 6 As shown, a replacement assembly 28 is provided inside the body 1 , and the replacement assembly 28 includes a moving slot 281 opened inside the body 1 .

[0027] The movable groove 281 is connected to the cavity 13, and the interior of the movable groove 281 is slidably connected to a connecting plate 282. The front side of the connecting plate 282 is fixedly connected to the back side of the connecting ring 22. A second electric push rod 283 is provided on the lower inner side of the movable groove 281. The telescopic end of the second electric push rod 283 is fixedly connected to the lower side of the connecting plate 282. An embedding groove 284 is opened on the lower inner side of the body 1, and the terminal 23 retracts into the embedded groove 284 after moving downward.

[0028] Only one of the two conductive sheets 21 is in squeeze contact with the outer surface of the bearing 11 at a time. After the upper conductive sheet 21 moves downward, it is squeezed into contact with the outer side of the bearing 11. The connecting plate 282 and the connecting ring 22 are both made of insulating material. The terminal 23 is wrapped inside the connecting ring 22 and is fixedly connected to the two conductive sheets 21.

[0029] By adopting the above technical solution, as the eddy current sensor 27 detects burn marks or dents on the surface of the conductive sheet 21, the second electric push rod 283 is started to pull the connecting plate 282 downward. As the connecting plate 282 moves inside the moving groove 281, the connecting ring 22 connected to the connecting plate 282 will simultaneously drive the two conductive sheets 21 to move downward. When the upper conductive sheet 21 contacts the upper side of the bearing 11, the lower conductive sheet 21 will be separated from the lower side of the bearing 11. During the downward movement of the connecting ring 22, part of the terminal 23 will retract into the embedded groove 284. Since the conductive sheet 21 can be quickly replaced during the up and down movement of the connecting ring 22, the conductive sheet 21 can be quickly replaced after one of the conductive sheets 21 fails, so as to ensure the electrostatic and current guidance efficiency of the conductive sheet 21 inside the body 1.

[0030] like Figures 1 to 3 As shown, the inner and outer sides of the body 1 are both provided with a warning component 29 , and the warning component 29 includes a controller 291 arranged on the front side of the body 1 .

[0031] A warning device 292 is provided on the front side of the controller 291 . The warning device 292 mainly comprises a warning light and a horn. The eddy current sensor 27 is electrically connected to the controller 291 .

[0032] By adopting the above technical solution, after the eddy current sensor 27 detects the conductive sheet 21, if a burn mark or a dent appears on the surface of the conductive sheet 21, the eddy current sensor 27 sends a signal to the controller 291, so that the controller 291 starts the second electric push rod 283 to operate. At the same time, the controller 291 will also start the alarm 292, so that the whistle in the alarm 292 will emit a warning sound and the warning light will also be turned on. When the second electric push rod 283 is extended and retracted to the longest or shortest extent for the first time, the alarm 292 is synchronously turned off. After the second electric push rod 283 completes a round-trip extension and retraction, the alarm 292 remains in a long-term activation state. Since the eddy current sensor 27 detects a burn mark or a dent on the surface of the conductive sheet 21, the alarm 292 will issue a warning to the staff. When the alarm 292 remains in the long-term activation state, it means that all the conductive sheets 21 have failed, thereby reminding the staff to repair or replace them in time.

[0033] like Figures 1 to 3 and Figure 5 As shown, a heat dissipation component 3 is provided on both the inner and outer sides of the body 1 , and the heat dissipation component 3 includes a fan blade 31 fixedly connected to the outer side of the rotor 12 .

[0034] The movable ring 25 is sleeved on the outside of the fan blade 31. The surface of the body 1 is provided with heat dissipation grooves 32 arranged in a ring array. The heat dissipation grooves 32 are connected to the cavity 13. The interior of the heat dissipation grooves 32 is provided with dustproof nets 33 arranged in parallel.

[0035] By adopting the above technical solution, during the rotation of the rotor 12, the fan blades 31 on the outside of the rotor 12 start to rotate driven by the rotor 12, and the airflow generated by the fan blades 31 will blow toward the bearing 11, and blow away the heat generated during the operation of the bearing 11, and then discharge it through the heat dissipation holes. The dustproof net 33 inside the heat dissipation holes can prevent dust or external impurities from entering the motor. The airflow generated by the heat dissipation holes and the fan can promote the heat dissipation of the bearing 11 inside the body 1, and the dustproof net 33 inside the heat dissipation holes can effectively ensure smooth airflow while preventing external impurities from entering the cavity 13, thereby ensuring the service life of the internal structure of the body 1.

[0036] Working principle: When static electricity accumulates inside the body 1 or current passes through, the conductive sheet 21 provides a bypass for the shaft current, allowing the current to bypass the bearing 11. The current guided by the conductive sheet 21 will be transmitted to the external grounding device through the terminal 23, and the current will be discharged from the body 1. When it is necessary to detect the surface of the conductive sheet 21, the first electric push rod 24 is started to push the movable ring 25. The movable groove 26 opened on the inner surface of the movable ring 25 will surround the outside of the conductive sheet 21. At the same time, the eddy current sensor 27 inside the movable groove 26 will contact the surface of the conductive sheet 21. If burn marks and dents are detected on the surface of the conductive sheet 21, the first electric push rod 24 will stop running immediately. As the eddy current sensor 27 detects burn marks or dents on the surface of the conductive sheet 21, the eddy current sensor 27 sends a signal to the controller 291 and starts the alarm 292. At the same time, the second electric push rod 28 Pull the connecting plate 282 downward. As the connecting plate 282 moves within the movable groove 281, the two conductive sheets 21 are simultaneously driven downward. When the upper conductive sheet 21 contacts the upper side of the bearing 11, the lower conductive sheet 21 will disengage from the lower side of the bearing 11, causing the controller 291 to activate the second electric push rod 283. When the second electric push rod 283 is extended to its longest or shortest position for the first time, the alarm 292 is simultaneously turned off. After the second electric push rod 283 completes a round trip extension, the alarm 292 remains activated. During the rotation of the rotor 12, the fan blades 31 on the outer side of the rotor 12 begin to rotate driven by the rotor 12. The airflow generated by the fan blades 31 blows toward the bearing 11, blowing away the heat generated during the operation of the bearing 11, and then dissipating it through the heat dissipation holes. The dust screen 33 inside the heat dissipation holes prevents dust or external impurities from entering the interior of the motor.

[0037] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. An air conditioner plastic-encapsulated motor, comprising a body (1) and a bearing (11) disposed inside the body (1), wherein a rotor (12) is rotatably connected to the inside of the body (1), the bearing (11) is sleeved on the outside of the rotor (12), a cavity (13) is opened on the front side of the inside of the body (1), and the bearing (11) is located inside the cavity (13), characterized in that: The body (1) is provided with a detection component (2) on both the inside and outside. The detection component (2) includes a conductive sheet (21) that is pressed and contacted on the upper and lower sides of the bearing (11). The back side of the conductive sheet (21) is fixedly connected to a connecting ring (22). The connecting ring (22) is sleeved on the outside of the bearing (11). The lower side of the connecting ring (22) is fixedly connected to a wiring member (23). The left and right sides of the front end of the cavity (13) are fixedly connected to a first electric push rod (24). The telescopic end of the first electric push rod (24) is fixedly connected to a moving ring (25). The moving ring (25) is slidably sleeved on the outside of the bearing (11) and the conductive sheet (21). The upper and lower sides of the inside of the moving ring (25) are provided with movable grooves (26). The inside of the movable groove (26) is provided with an eddy current sensor (27).

2. The air conditioner plastic-encapsulated motor according to claim 1, characterized in that: The movable groove (26) is slidably sleeved on the outside of the conductive sheet (21), the other end of the connecting piece (23) is electrically connected to an external grounding device, and the eddy current sensor (27) and the first electric push rod (24) are both electrically connected to an external power supply.

3. The air conditioner plastic-encapsulated motor according to claim 1, characterized in that: The shape of the interior of the moving ring (25) matches the shape of the exterior of the bearing (11), and the diameter of the connecting ring (22) is larger than the diameter of the bearing (11).

4. The air conditioner plastic-encapsulated motor according to claim 1, characterized in that: A replacement component (28) is provided inside the body (1), and the replacement component (28) includes a movable groove (281) provided inside the body (1). The movable groove (281) is communicated with the cavity (13), and a connecting plate (282) is slidably connected inside the movable groove (281). The front side of the connecting plate (282) is fixedly connected to the back side of the connecting ring (22). A second electric push rod (283) is provided on the lower side of the inner part of the movable groove (281), and the telescopic end of the second electric push rod (283) is fixedly connected to the lower side of the connecting plate (282). An embedding groove (284) is provided on the lower side of the inner part of the body (1), and the terminal (23) retracts into the embedding groove (284) after moving downward.

5. The air conditioner plastic-encapsulated motor according to claim 4, characterized in that: The connecting plate (282) and the connecting ring (22) are both made of insulating material, and the connecting piece (23) is wrapped inside the connecting ring (22) and fixedly connected to the two conductive sheets (21).

6. The air conditioner plastic-encapsulated motor according to claim 1, characterized in that: The inner and outer sides of the body (1) are both provided with a warning component (29), the warning component (29) comprising a controller (291) provided on the front side of the body (1), a warning device (292) provided on the front side of the controller (291), the warning device (292) mainly comprising a warning light and a whistle, and the eddy current sensor (27) and the controller (291) are electrically connected.

7. The air conditioner plastic-encapsulated motor according to claim 1, characterized in that: The inner and outer sides of the machine body (1) are both provided with a heat dissipation component (3), and the heat dissipation component (3) includes a fan blade (31) fixedly connected to the outer side of the rotor (12).

8. The air conditioner plastic-encapsulated motor according to claim 7, characterized in that: The movable ring (25) is sleeved on the outside of the fan blade (31), and the surface of the body (1) is provided with heat dissipation grooves (32) arranged in a ring array, the heat dissipation grooves (32) are connected to the cavity (13), and the interior of the heat dissipation grooves (32) is provided with dustproof nets (33) arranged in parallel.

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