Structure for eliminating motor shaft current and air conditioner with same

Abstract

The utility model discloses a structure for eliminating motor shaft current and an air conditioner with the same, which comprises a motor shaft body, the motor shaft body is connected to the output end of a motor, the motor is installed on the peripheral side of the motor shaft body and the motor shaft body, the motor shaft body is provided with a flexible grounding device, and the flexible grounding device comprises a metal impeller installed on the motor shaft body. The metal impeller is connected with the flexible grounding assembly; the flexible grounding assembly is connected with the ground wire; according to the motor shaft, the metal impeller and the flexible grounding assembly are arranged, grounding of the motor shaft body is achieved, flexible connection is arranged, the influence on normal rotation of the motor shaft body is reduced while grounding is achieved, the shaft current is eliminated through the structure, the phenomenon that a bearing on the motor shaft body is corroded by the generated shaft current is fundamentally avoided, and the service life of the motor shaft body is prolonged. Therefore, the service life of the motor shaft body and the motor is prolonged, and the working efficiency of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning equipment, and particularly relates to a structure for eliminating motor shaft current and an air conditioner having the same. Background Art

[0002] During the rotation of a generator, as long as there is unbalanced magnetic flux linking the rotating shaft, an induced electromotive force will be generated at both ends of the rotating shaft of the generator, and this induced electromotive force is called shaft voltage. When the shaft voltage reaches a certain value, a closed circuit is formed through the bearing and its base, etc., to generate current, and this current is called shaft current.

[0003] Motor shaft current will corrode the bearing track, resulting in increased vibration of the motor. With the continuous development of frequency conversion technology, the harm of motor shaft current is further aggravated. Currently, to solve the problem of bearing corrosion, it is all avoided through bearing insulation, and some small motors use ceramic bearings to avoid it. However, the above measures have not fundamentally eliminated the shaft current. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, a structure for eliminating motor shaft current and an air conditioner having the same are proposed, solving the problem that the shaft current has not been fundamentally eliminated in the above background art.

[0005] To achieve the above object, the following technical solutions are proposed by the utility model for implementation:

[0006] A structure for eliminating motor shaft current includes a motor shaft body, the motor shaft body is connected to the output end of the motor, the motor is installed on the periphery of the two devices, a flexible grounding device is arranged on the motor shaft body, the flexible grounding device includes a metal wave wheel installed on the motor shaft body, the metal wave wheel is connected to a flexible grounding component, and the flexible grounding component is connected to the ground wire.

[0007] Further, the flexible grounding component includes a water tank, an electrolyte solution is poured into the water tank, and the metal wave wheel is in contact with the electrolyte solution.

[0008] Further, the water tank is fixed on the two devices, a grounding terminal is arranged in the water tank, the grounding terminal is in contact with the electrolyte solution, and the grounding terminal is connected to the ground wire through a cable.

[0009] Further, a water receiving tray is arranged below the two devices, a water pump is installed in the water receiving tray, and the water pump is communicated with the water tank through a liquid supplement pipe.

[0010] Further, a liquid level sensor is arranged in the water tank, the liquid level sensor is in signal connection with the water pump, and the liquid level sensor detects the liquid level height of the electrolyte solution to control the switch of the water pump.

[0011] Further, a metal strip is provided in the water tank. The metal strip is connected to the control main board through a control circuit. The water pump is controlled and connected to the control main board. The control circuit sends a normally closed or normally open signal to the control main board according to whether the metal strip is in contact with the electrolyte solution, and the control main board controls the water pump to close or open.

[0012] Further, the bottom height of the metal strip is not lower than the bottom height of the metal wave wheel.

[0013] Further, a brush is provided in the water tank. The brush is fixed on the inner wall of the water tank, and the brush head of the brush contacts the metal wave wheel.

[0014] Further, a water baffle is fixedly installed on the periphery of the water tank. The motor shaft body penetrates through the water baffle and is rotatably connected to the water baffle.

[0015] Further, the motor is a double-shaft motor. The two sides of the motor are respectively connected to the metal wave wheel and the wind wheel through the motor shaft body. The metal wave wheel and the wind wheel are coaxially arranged with the motor shaft body, and the wind wheel is installed on the two devices.

[0016] An air conditioner includes a structure for eliminating motor shaft current as described in any one of the above.

[0017] Compared with the prior art, the comprehensive effects brought by the present utility model include:

[0018] (1) In this application, a metal wave wheel and a flexible grounding component are provided to realize the grounding of the motor shaft body. The flexible connection is set to reduce the influence on the normal rotation of the motor shaft body while realizing grounding. The above structure eliminates the shaft current, fundamentally avoids the corrosion of the bearing on the motor shaft body caused by the shaft current, prevents the vibration of the motor from intensifying during operation, thereby improving the service life of the motor shaft body and the motor, and improving the working efficiency of the motor.

[0019] (2) In this application, a water receiving tray is provided to store a certain amount of water, and the water is supplemented into the water tank through a liquid supplement pipe to ensure that the electrolyte solution in the water tank maintains a certain concentration and the contact state with the metal wave wheel; through the water pump device in the water receiving tray, the water is introduced into the water tank for supplementation and dilution, and at the same time, the liquid level in the water tank is always kept in contact with the metal wave wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a flexible grounding device according to an embodiment of the present utility model;

[0021] Figure 2 is Figure 1 a partial structural schematic diagram in

[0022] Figure 3Front view schematic diagram of the overall structure of the embodiment of the present utility model;

[0023] Figure 4 Top view schematic diagram of the overall structure of the embodiment of the present utility model;

[0024] Figure 5 Side view schematic diagram of the overall structure of the embodiment of the present utility model;

[0025] Figure 6 Schematic diagram of the principle of the metal strip and the water pump control of the present utility model.

[0026] Legend: 1. Motor shaft body; 2. Motor; 3. Two devices; 4. Flexible grounding device; 5. Metal pulley; 6. Water tank; 7. Electrolyte solution; 8. Water receiving tray; 9. Water pump; 10. Liquid level sensor; 11. Brush; 12. Water baffle; 13. Wind wheel. Specific implementation mode

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative work are within the protection scope of the present utility model.

[0028] In this article, terms such as "upper", "lower", "left", "right", "top", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0029] As Figures 1 to 6 shown, a structure for eliminating the shaft current of the motor includes a motor shaft body 1, the motor shaft body 1 is connected to the output end of a motor 2, the motor 2 is installed on the periphery of two devices 3, a flexible grounding device 4 is arranged on the motor shaft body 1, the flexible grounding device 4 includes a metal pulley 5 installed on the motor shaft body 1, the metal pulley 5 is connected to a flexible grounding component, and the flexible grounding component is connected to the ground wire.

[0030] By setting the metal pulley 5 and the flexible grounding component in the flexible grounding device 4, the grounding of the motor shaft body 1 is realized. The flexible connection is set to reduce the influence on the normal rotation of the motor shaft body 1 while realizing grounding. The above structure eliminates the shaft current, fundamentally avoids the corrosion of the bearing on the motor shaft body 1 caused by the shaft current, prevents the vibration of the motor 2 from increasing during operation, thereby improving the service life of the motor shaft body 1 and the motor 2 and improving the working efficiency of the motor.

[0031] In the structure for eliminating the shaft current of the motor in this embodiment, the flexible grounding assembly includes a water tank 6, an electrolyte solution 7 is poured into the water tank 6, and the metal impeller 5 is in contact with the electrolyte solution 7.

[0032] Through the above settings, flexible grounding of the motor shaft body 1 is achieved. The metal impeller 5 is in contact with the electrolyte solution 7, and conduction is achieved through the electrolyte solution 7 to reach the grounding purpose. At the same time, the liquid electrolyte solution 7 has little resistance to the metal impeller 5, avoiding affecting the normal operation of the motor shaft body 1.

[0033] In the structure for eliminating the shaft current of the motor in this embodiment, the water tank 6 is fixed on the two apparatuses 3. A grounding terminal is arranged in the water tank 6. The grounding terminal is in contact with the electrolyte solution 7, and the grounding terminal is connected to the ground wire through a cable.

[0034] By arranging the grounding terminal and connecting the electrolyte solution 7 and the ground wire through a cable, indirect grounding of the metal impeller 5 and the motor shaft body 1 is achieved. The contact between the grounding terminal and the electrolyte solution 7 ensures that the grounding end is connected to the metal impeller 5 that also contacts the electrolyte solution 7 to achieve conduction.

[0035] Preferably, in order to ensure the contact between the grounding terminal and the electrolyte solution 7, the grounding terminal is fixed at the inner bottom of the water tank 6.

[0036] In the structure for eliminating the shaft current of the motor in this embodiment, a water receiving tray 8 is arranged below the two apparatuses 3. A water pump 9 is installed in the water receiving tray 8, and the water pump 9 is communicated with the water tank 6 through a liquid replenishing pipe.

[0037] By arranging the water receiving tray 8 to store a certain amount of water and supplement water into the water tank 6 through the liquid replenishing pipe, it is ensured that the electrolyte solution 7 in the water tank 6 maintains a certain concentration and the contact state with the metal impeller 5.

[0038] Specifically, during the use process, the water in the electrolyte solution 7 will continuously evaporate, causing the liquid level in the water tank 6 to drop. At this time, through the water pump 9 device in the water receiving tray 8, water is introduced into the water tank 6 for dilution, and at the same time, the liquid level in the water tank 6 is always kept in contact with the metal impeller 5.

[0039] In the structure for eliminating the shaft current of the motor in this embodiment, a liquid level sensor 10 is arranged in the water tank 6. The liquid level sensor 10 is signal-connected to the water pump 9, and the liquid level sensor 10 detects the liquid level height of the electrolyte solution 7 to control the switch of the water pump 9.

[0040] Specifically, a liquid level sensor 10 is provided to monitor the liquid level of the electrolyte solution 7 in the water tank 6. A first preset liquid level is set. When the liquid level sensor 10 detects that the liquid level is lower than the first preset liquid level, it sends a signal to the water pump 9 to control its activation to replenish water to the water tank 6. A second preset liquid level is set. When the liquid level sensor 10 detects that the liquid level reaches the second preset liquid level, it sends a signal to the water pump 9 to control its shutdown. The specific principle of the liquid level sensor 10 controlling the switch of the water pump 9 is prior art and will not be elaborated here.

[0041] In another embodiment, a metal strip is provided in the water tank 6. The metal strip is connected to the control main board through a control circuit, and the water pump 9 is controlledly connected to the control main board.

[0042] Specifically, a metal strip is installed at a suitable position inside the water tank 6 to act as a contact point. As Figure 6 shown, when the liquid level of the electrolyte solution 7 contacts the metal strip, it is equivalent to a normally closed contact. At this time, through the normally closed signal, the water pump 9 is powered off and does not work. When the liquid level is lower than the metal strip and does not contact the metal strip, it is equivalent to a normally open contact. Through the normally open signal, the water pump 9 is powered on to work and replenish water to the water tank 6. Therefore, by detecting the normally open and normally closed states, the liquid level is controlled. The control circuit sends a normally closed or normally open signal to the control main board according to whether the metal strip contacts the electrolyte solution 7, and the control main board controls the water pump 9 to close or open.

[0043] Preferably, the bottom height of the metal strip is not lower than the bottom height of the metal wave wheel 5.

[0044] Through the above settings, when the liquid level contacts the metal strip, it is ensured that the liquid level is below the metal wave wheel 5 and does not contact the metal wave wheel 5, so as to avoid the failure to achieve the conductive effect.

[0045] In the structure for eliminating the motor shaft current of this embodiment, a brush 11 is provided in the water tank 6. The brush 11 is fixed on the inner wall of the water tank 6, and the brush head of the brush 11 contacts the metal wave wheel 5.

[0046] Specifically, in order to prevent the metal wave wheel 5 from being oxidized, rusting, and losing the grounding effect, a brush 11 is provided on its circumferential side, so that the metal wave wheel 5 is always in contact with the brush head during operation, which has the effect of polishing the oxide layer of the metal wave wheel 5 and also has the effect of slowing down the axial movement of the electrolyte solution 7 in the water tank 6 driven by the metal wave wheel 5 during rotation.

[0047] In the structure for eliminating the motor shaft current of this embodiment, a water baffle 12 is fixedly installed on the circumferential side of the water tank 6. The motor shaft body 1 passes through the water baffle 12 and is rotatably connected to the water baffle 12.

[0048] Specifically, during the rotation of the motor shaft body 1 driving the metal wave wheel 5, liquid may splash, thus bringing water out of the water tank, reducing the concentration of the electrolyte solution 7. Therefore, a water baffle 12 is installed above to block the splashing liquid, causing it to flow back into the water tank 6 along the water baffle 12, reducing liquid loss.

[0049] Preferably, the motor shaft body 1 can also penetrate through the side wall of the water tank 6 to reduce the overall size of the flexible grounding device.

[0050] In the structure for eliminating motor shaft current of this embodiment, the motor 2 is a dual-shaft motor. Both sides of the motor 2 are respectively connected to the metal wave wheel 5 and the wind wheel 13 through the motor shaft body 1. The metal wave wheel 5 and the wind wheel 13 are both coaxially arranged with the motor shaft body 1, and the wind wheel 13 is installed on the two-device 3.

[0051] By setting a dual-shaft motor, the metal wave wheel 5 and the wind wheel 13 rotate synchronously. Specifically, the surface of the metal wave wheel 5 is smooth and has an interference fit with the motor shaft body 1; or it can be firmly fixed by spot welding; or threaded holes are opened on the side of the metal wave wheel 5, and it is installed in a clearance fit similar to the wind wheel 13 and tightened through the threaded holes to achieve fixation.

[0052] On the other hand, the present application also proposes an air conditioner, including a structure for eliminating motor shaft current in any one of the above embodiments.

[0053] It can be anticipated that the air conditioner proposed in the present application includes all the beneficial effects of the structure for eliminating motor shaft current in the above embodiments, which will not be elaborated here.

[0054] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "setting", "connection", "fixation", "rotation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0055] Although the embodiments of the present utility model have been shown and described in detail, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and deformations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A structure for eliminating motor shaft current, characterized in that, It includes a motor shaft body which is connected to the output end of a motor. The motor is installed on the periphery of the two apparatuses. A flexible grounding device is provided on the motor shaft body. The flexible grounding device includes a metal pulley installed on the motor shaft body. The metal pulley is connected to a flexible grounding component, and the flexible grounding component is connected to a ground wire.

2. The structure for eliminating shaft current of an electric machine according to claim 1, characterized in that, The flexible grounding component includes a water tank filled with an electrolyte solution, and the metal pulley is in contact with the electrolyte solution.

3. The structure for eliminating shaft current of an electric machine according to claim 2, characterized in that, The water tank is fixed on the two apparatuses. A grounding terminal is arranged in the water tank and is in contact with the electrolyte solution. The grounding terminal is connected to the ground wire through a cable.

4. A structure for eliminating shaft current of a motor according to claim 3, characterized in that, A water receiving tray is arranged below the two apparatuses, and a water pump is installed in the water receiving tray. The water pump is communicated with the water tank through a liquid supplement pipe.

5. A structure for eliminating shaft current of a motor according to claim 4, characterized in that, A liquid level sensor is arranged in the water tank. The liquid level sensor is in signal connection with the water pump, and the liquid level sensor detects the liquid level height of the electrolyte solution to control the switch of the water pump.

6. The structure for eliminating shaft current of an electric machine according to claim 4, wherein, A metal strip is arranged in the water tank. The metal strip is connected to a control main board through a control circuit. The water pump is controlledly connected to the control main board. The control circuit sends a normally closed or normally open signal to the control main board according to whether the metal strip is in contact with the electrolyte solution, and the control main board controls the water pump to close or open.

7. The structure for eliminating shaft current of a motor according to claim 6, wherein The bottom height of the metal strip is not lower than the bottom height of the metal pulley.

8. A structure for eliminating shaft current of a motor according to claim 2, characterized in that, A brush is arranged in the water tank. The brush is fixed on the inner wall of the water tank, and the brush head of the brush is in contact with the metal pulley.

9. A structure for eliminating shaft current of a motor according to claim 2, characterized in that, A water baffle is fixedly installed on the periphery of the water tank. The motor shaft body penetrates through the water baffle and is rotatably connected to the water baffle.

10. A structure for eliminating motor shaft current according to claim 1, characterized in that, The motor is a double-shaft motor. Metal pulleys and a wind wheel are respectively connected to both sides of the motor through the motor shaft body. The metal pulleys and the wind wheel are coaxially arranged with the motor shaft body, and the wind wheel is installed on the two apparatuses.

11. An air conditioner, characterized in that, It includes a structure for eliminating motor shaft current according to any one of claims 1-10.

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