CN213637322U - Motor and junction box thereof - Google Patents

Abstract

The utility model discloses a junction box for the motor, including the box body, the top of box body is equipped with the hot plate, still is equipped with in the box body to be used for conducting the heat pipe mechanism at bottom to the box body top with the heat from the box body, is equipped with the heat-conducting medium in the heat pipe mechanism. Because be equipped with heat pipe mechanism in the box body, the heat of heat-conducting medium evaporation back in the heat pipe mechanism takes away the heat of box body bottom, and heat-conducting medium condenses at the box body top afterwards to conduct the bottom of box body to the box body top. Meanwhile, the heating plate is arranged at the top of the box body, so that the temperature at the top of the box body is higher than that at the bottom of the box body, the bottom of the box body is guaranteed to be condensed, and the motor is prevented from being damaged due to the fact that the condensed water drips on a circuit in the box body. The utility model also provides a motor including above-mentioned terminal box to have above-mentioned advantage.

Description

Motor and junction box thereof

Technical Field

The utility model relates to the technical field of motors, in particular to terminal box. The utility model discloses still relate to a motor including above-mentioned terminal box.

Background

The motor is an important driving device in industrial production, and most of the motors are arranged outdoors or indoors with lower protection level. The motor may thus be subject to water ingress or condensation which may result in a reduction in the motor insulation resistance. After the insulation resistance drops to a certain value, the motor can not be started, and if the motor is started by force, short circuit can be caused, so that the motor is burnt.

At present, the sealing of the stator and the rotor of the motor at home and abroad is quite tight, and basically, the stator slot chamber of the motor with the protection grade of IP54 or above can be protected from general moisture. However, the motor junction box is difficult to protect, and the insulation reduction of the motor caused by condensation in the junction box accounts for more than 70%. The manufacturers of electric motors usually install heaters in the narrow spaces of the junction box and the stator slot chamber of the motor to heat the air and prevent the motor from being affected with damp, but the result is not ideal.

Therefore, how to effectively prevent the motor junction box from being damaged by condensation is a technical problem which needs to be solved urgently by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a terminal box, it is carried the heat of box body bottom to the box body top through heat pipe mechanism, guarantees that the condensation takes place in the box body bottom to prevent that the terminal box from receiving the condensation and destroying. Another object of the present invention is to provide a motor including the above junction box.

In order to achieve the above object, the utility model provides a junction box for the motor, comprises a box bod, the top of box body is equipped with the hot plate, still be equipped with in the box body and be used for following the heat the bottom conduction of box body extremely the heat pipe mechanism at box body top, be equipped with heat-conducting medium in the heat pipe mechanism.

Preferably, the heat pipe mechanism comprises an evaporation coil arranged at the bottom of the box body and a condensation coil arranged at the top of the box body, the first end of the evaporation coil is connected with the first end of the condensation coil through a steam pipe, and the second end of the evaporation coil is connected with the second end of the condensation coil through a downcomer.

Preferably, the height of the condensing coil is reduced along the flowing direction of the heat transfer medium, and the downcomer is connected with the lowest point of the condensing coil.

Preferably, the steam pipe is located on the opposite side of the downcomer, the steam pipe being connected to the highest point of the condensing coil.

Preferably, the bottom of the box body is provided with a condensation water chute with a preset gradient, and the condensation water chute is positioned below the condensation coil pipe.

Preferably, the lowest point of the condensation water chute is connected with a drain pipe, and a drain valve is arranged in the drain pipe.

Preferably, the top of the box body is further provided with a fan for blowing hot air in the box body to a top plate of the box body.

Preferably, the fan is located below the heating plate and the evaporation coil.

The utility model also provides a motor, including above-mentioned arbitrary one the terminal box.

The utility model provides a terminal box for the motor, including the box body, the top of box body is equipped with the hot plate, still is equipped with in the box body to be used for conducting the heat pipe mechanism at bottom to the box body top with the heat from the box body, is equipped with the heat-conducting medium in the heat pipe mechanism.

Because be equipped with heat pipe mechanism in the box body, the heat of heat-conducting medium evaporation back in the heat pipe mechanism takes away the heat of box body bottom, and heat-conducting medium condenses at the box body top afterwards to conduct the bottom of box body to the box body top. Meanwhile, the heating plate is arranged at the top of the box body, so that the temperature at the top of the box body is higher than that at the bottom of the box body, the bottom of the box body is guaranteed to be condensed, and the motor is prevented from being damaged due to the fact that the condensed water drips on a circuit in the box body.

The utility model also provides a motor including above-mentioned terminal box to have above-mentioned advantage.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the junction box provided by the present invention.

Wherein the reference numerals in fig. 1 are:

the device comprises a box body 1, a heating plate 2, a condensation water guide groove 3, a water discharge pipe 4, a heat pipe mechanism 5, a fan 6, a water discharge valve 41, a condensation coil 51, an evaporation coil 52, a downcomer 53 and a steam pipe 54.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a junction box according to the present invention.

The utility model provides a terminal box is arranged in the motor. As shown in fig. 1, the junction box includes a box body 1, a heating mechanism, and a heat pipe mechanism 5. Wherein, heating mechanism is for setting up hot plate 2 at 1 top of box body, and 2 one sides of hot plate are the circuit box of hot plate 2. The heating mechanism can heat the air in the box body 1, so that the temperature in the box body 1 is higher than the dew point of water vapor, and the purpose of avoiding condensation in the junction box is achieved. The heat pipe mechanism 5 includes an evaporation section and a condensation section, both ends of which are connected to the downcomer 53 through the steam pipe 54, respectively. The evaporation zone is arranged at the bottom of the box body 1, and the condensation zone is arranged at the top of the box body 1. The heat pipe mechanism 5 is provided with a heat conducting medium, the heat conducting medium is condensed in the condensation section to release heat, and then flows downwards along the downcomer 53 to the evaporation section under the action of gravity. The heat-conducting medium evaporates in the evaporation section to absorb heat and then rises along the steam pipe 54 to the condensation section, so that circulation of the heat-conducting medium is realized. The heat conducting medium conducts heat from the bottom of the box body 1 to the top of the box body 1 in the circulating process. The selection of the heat conducting medium can be found in the prior art, and is not described in detail herein.

Optionally, the evaporation section is an evaporation coil 52 located at the bottom of the box body 1, the evaporation coil 52 may be disposed below the heating plate 2, and the condensation section is a condensation coil 51 located at the top of the box body 1. The evaporation coil 52, the heating plate 2 and the condensation coil 51 can be fixed with the box body 1 through a support frame or a buckle. The evaporating coil 52 and the condensing coil 51 are distributed in an S shape, and the evaporating coil 52 and the condensing coil 51 cover the top surface and the ground of the box body 1 respectively. A first end of the evaporator coil 52 is connected to a first end of the condenser coil 51 by a steam pipe 54 and a second end of the evaporator coil 52 is connected to a second end of the condenser coil 51 by a downcomer 53.

Optionally, to promote the flow of the heat transfer medium, the height of the condensing coil 51 is gradually reduced along the flow direction of the heat transfer medium, and the downcomer 53 is connected to the lowest point of the condensing coil 51. The heat transfer medium thus condenses and flows by gravity along the condensing coil 51 into the downcomer 53. A steam pipe 54 is connected to the highest point of the condensing coil 51. The steam pipe 54 is located on the side opposite to the downcomer 53, and in particular, the downcomer 53 may be disposed below the line box of the heating means, which side is lower in temperature and the heat transfer medium is more likely to condense.

Set up heat pipe mechanism 5 in the box body 1, carry the heat of box body 1 bottom to box body 1 top, therefore box body 1 bottom temperature is less than box body 1 top. Even if the water vapor condenses, the dew drops and often condenses at the bottom of the box body 1, and then the short circuit of the motor caused by the dripping of the dew is avoided. In addition, the bottom of the box body 1 can be provided with a condensation water chute 3. Specifically, the bottom plate of the box body 1 has a preset gradient, the gradient forms a condensation water chute 3, the condensation water chute 3 is located below the condensation coil 51, and condensation drops in the condensation water chute 3, and flows to the lowest point along the condensation water chute 3.

Further, the lowest point of the condensation water chute 3 is connected with a drain pipe 4, and a drain valve 41 is arranged in the drain pipe 4. The condensed water is introduced into the drain pipe 4 along the condensed water guide 3, and the condensed water is discharged by opening the drain valve 41. In order to facilitate the operator to observe the liquid level, the vertical pipe section of the drain pipe 4 can be made of transparent plastic material.

Optionally, in order to ensure that the heating plate 2 can uniformly heat the air in the box body 1, the top of the box body 1 is also provided with a fan 6, and the fan 6 drives the air to flow so as to uniformly distribute the heat in the box body 1. In addition, since the condensation occurs on the top of the box body 1 and poses a great threat to the motor, the fan 6 is located below the heating plate 2 and the evaporating coil 52, the air discharge direction of the fan 6 faces the top plate of the box body 1, and the heating plate 2 is further provided with air passing holes penetrating in the thickness direction for passing air. The fan 6 rotates the air in the box body 1 to flow upwards, the temperature of the air rises after passing through the condensation pipe and the heater, and the air heats the top plate after contacting with the top plate of the box body 1. Air flows to the side wall through the top plate and then flows to the bottom of the box body 1 along the side wall, so that heat distribution in the box body 1 is more uniform. The temperature of the top plate of the box body 1 rises, and the risk of condensation on the top of the box body 1 is further reduced.

In this embodiment, set up hot plate 2 and heat pipe mechanism 5 in the terminal box, hot plate 2 can heat the air in the box body 1, makes the dew point that the temperature is higher than vapor in the box body 1, reduces the condensation risk. The heat pipe mechanism 5 can transport the heat of the bottom of the box body 1 to the top of the box body 1, so that even if the water vapor condenses, the condensation process also usually occurs at the bottom of the box body 1, thereby avoiding the condensation from dripping on the circuit of the motor. In addition, still set up the fan in the box body 1, the fan blows hot-air to the roof of box body 1, further improves the roof temperature, avoids the roof condensation, reduces the risk that the dew drips on the circuit of motor.

The utility model also provides a motor, which comprises any one of the junction boxes; the structure of other parts of the motor can refer to the prior art, and is not described in detail herein.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The motor and the junction box thereof provided by the utility model are introduced in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (9)

1. The junction box is used for a motor and is characterized by comprising a box body (1), a heating plate (2) is arranged at the top of the box body (1), a heat pipe mechanism (5) used for conducting heat from the bottom of the box body (1) to the top of the box body (1) is further arranged in the box body (1), and a heat conducting medium is arranged in the heat pipe mechanism (5).

2. The junction box according to claim 1, wherein the heat pipe mechanism (5) comprises an evaporation coil (52) disposed at the bottom of the box body (1) and a condensation coil (51) disposed at the top of the box body (1), a first end of the evaporation coil (52) is connected to a first end of the condensation coil (51) through a steam pipe (54), and a second end of the evaporation coil (52) is connected to a second end of the condensation coil (51) through a downcomer (53).

3. Junction box according to claim 2, wherein the height of the condensation coil (51) decreases in the direction of flow of the heat transfer medium, and the downcomer (53) is connected to the lowest point of the condensation coil (51).

4. The junction box of claim 2, wherein the steam pipe (54) is located on a side opposite the downcomer (53), the steam pipe (54) being connected to a highest point of the condensing coil (51).

5. The junction box according to claim 2, characterized in that the bottom of the box body (1) is provided with a condensation water chute (3) with a preset gradient, and the condensation water chute (3) is positioned below the condensation coil (51).

6. The junction box according to claim 5, characterized in that a drain pipe (4) is connected to the lowest point of the condensation gutter (3), and a drain valve (41) is arranged in the drain pipe (4).

7. The junction box according to any one of claims 2 to 6, wherein the top of the box body (1) is further provided with a fan (6) for blowing hot air in the box body (1) toward the top plate of the box body (1).

8. Junction box according to claim 7, characterized in that said fan (6) is located below said heating plate (2) and said evaporation coil (52).

9. An electrical machine comprising a junction box according to any one of claims 1 to 8.

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