CN215934617U - Junction box structure for preventing motor condensation - Google Patents

Abstract

The utility model relates to the technical field of motor junction boxes and discloses a junction box structure for preventing motor condensation, which comprises a junction box shell, a junction box inner plate and a junction box outer plate, wherein the junction box shell is provided with an open end, the junction box inner plate is detachably covered on the open end of the junction box shell, the junction box outer plate is fixed on the outer side wall of the junction box inner plate and forms a condensation cavity with the junction box inner plate, and the upper part of the junction box inner plate is provided with a junction box inner plate air window for communicating the inner cavity of the junction box shell with the condensation cavity. When the motor is in operation, hot-air and terminal box planking inner wall contact in the condensation cavity, because the temperature drop, moisture in the gas can be appeared, forms the comdenstion water, along with the operation vibration of motor, the comdenstion water can fall to the condensation cavity in to guarantee that the condensation can not contact the inner line, avoided the condensation to power supply line insulating destruction and corruption, improve driving motor's reliability.

Description

Junction box structure for preventing motor condensation

Technical Field

The utility model relates to the technical field of motor junction boxes, in particular to a junction box structure for preventing motor condensation.

Background

The permanent magnet synchronous driving motor for the automobile is generally small in size and has high sealing performance requirement, and the IP67 grade is generally required to be achieved. The motor can generate heat when the operation, and inside gas pressure can rise, and motor stall back temperature reduces, and inside gas pressure can reduce, when the inside gas pressure of motor changes, needs carry out gas exchange with the external world, and the waterproof ventilation valve of installation on the motor is used frequently at present, can prevent moisture under the condition that gas can pass through and pass through.

Although the waterproof ventilation valve can prevent visible water from entering and exiting the motor, the moisture in the air can be separated out along with the change of the temperature of the air entering the motor due to the existence of certain humidity of the air, and the phenomenon that the liquid water is separated out is called condensation.

The motor condensation phenomenon mainly occurs in the following two conditions:

1. when the temperature of the interior of the motor is higher than that of the exterior in a heating stage, and the interior air is heated and meets a shell with the temperature lower than the dew point on the surface, water vapor is condensed on the shell wall to form condensation;

2. it occurs that in the cooling phase, the outside ambient temperature is low, so the housing wall is cooler than the inside air temperature, and if the housing inner wall temperature reaches the dew point temperature of the inside air, condensation forms on the housing inner wall.

When the driving motor operates, the stator winding is electrified, the temperature inside the motor rises, water vapor inside the motor can rise to the junction box, the temperature drops fast due to the contact of the junction box and the outside, and the water vapor can be liquefied and condensed into dew on the inner wall of the junction box when meeting cold. The condensation can gather inside the terminal box, causes the dielectric breakdown of motor, has reduced working life, influences the normal use and the driving safety of motor.

At present, there are various measures in the aspect of condensation prevention, such as sticking a rubber pad on a rear cover plate to prevent the temperature difference between the inside and the outside of the cover plate of the junction box from being too large, but the problem in long-term use cannot be avoided due to the large area of the junction box.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a junction box structure for preventing motor condensation, which can prevent condensed water generated at the junction box from being collected at a power line in the operation process of a motor, the condensed water is not contacted with electrical elements in the junction box, and the insulation damage and corrosion of the internal circuit of the motor are protected. Reduce the inside air humidity's of motor advantage, solved current terminal box inner wall and can liquefy and condense into the dewdrop, cause the dielectric breakdown of motor, reduced life's problem.

In order to achieve the purpose, the utility model provides the following technical scheme:

a junction box structure for preventing motor condensation comprises a junction box shell, a junction box inner plate and a junction box outer plate.

The junction box outer shell is provided with an open end, the junction box inner plate is detachably covered on the open end of the junction box outer shell, and the junction box outer plate is fixed on the outer side wall of the junction box inner plate and forms a condensation cavity with the junction box inner plate.

And the upper part of the junction box inner plate is provided with a junction box inner plate louver used for communicating the inner cavity of the junction box shell with the condensation cavity.

The scheme is further optional, a condensation component is arranged in the condensation cavity and comprises a condensation part arranged in the condensation cavity, and the condensation part and air in the condensation cavity are subjected to heat exchange to condense water vapor to form condensation.

According to the scheme, the condensing part is a condensing column, one end of the condensing column is fixedly connected with the inner wall of the junction box outer plate, the other end of the condensing column extends towards the junction box inner plate, and a certain interval is formed between the other end of the condensing column and the junction box inner plate.

The above scheme is further optional, a water outlet communicated with the condensation cavity is formed in the bottom of the junction box outer plate, and a water drainage control device for controlling the opening/closing of the water drain hole is mounted on the water outlet.

The above scheme is further optional, the drainage control device is a blocking bolt detachably mounted on the drainage port, the drainage port is closed when the blocking bolt is mounted, and the drainage port is opened when the blocking bolt is dismounted.

According to the scheme, the outer plate of the junction box is further provided with an overflow port communicated with the condensation cavity, a certain interval is formed between the overflow port and the bottom wall of the condensation cavity, and when condensed water in the condensation cavity is collected at the overflow port, the condensed water is discharged.

The scheme is further optional, the outer wall of the junction box outer plate is provided with a heat dissipation assembly, the heat dissipation assembly comprises a heat dissipation part, and the heat dissipation part dissipates heat to the junction box outer plate by utilizing the heat conduction principle.

In a further optional manner, the heat dissipation part is a heat dissipation fin, and the heat dissipation fins are fixed to the outer wall of the junction box outer plate.

The scheme is further optional, the inner wall of the junction box outer plate is provided with a partition plate, when the junction box inner plate and the junction box outer plate are assembled, the outer wall of the partition plate is attached to the outer wall of the junction box inner plate, the partition plate divides the condensation cavity into an upper condensation cavity and a lower water storage cavity, the partition plate is provided with a water through hole used for communicating the upper condensation cavity and the lower water storage cavity, the condensation component is arranged in the upper condensation cavity, and the water storage cavity at the lower part is communicated with the external environment through the water outlet.

In a further alternative of the above solution, the junction box inner plate and the junction box outer plate are fastened to the open end of the junction box housing by the same connector.

Compared with the prior art, the utility model provides a junction box structure for preventing motor condensation, which has the following beneficial effects:

1. this prevent terminal box structure of motor condensation sets up terminal box inner panel and terminal box planking through the opening end at the terminal box shell, constitutes the condensation cavity between terminal box inner panel and the terminal box planking, makes the interior damage and the corruption of power supply line insulation of condensation avoided can not contact internal line in the condensation cavity, improves driving motor's reliability.

2. This prevent terminal box structure of motor condensation through set up drainage component in the condensation cavity, is convenient for handle the evacuation of condensation water in the condensation cavity, reduces the inside air humidity of motor.

3. This prevent terminal box structure of motor condensation through set up the condensation subassembly in the condensation cavity, sets up radiator unit at the outer wall of terminal box shell, and the moisture in the hot-air of being convenient for is appeared fast, forms the comdenstion water storage in lower part water storage intracavity, reduces the inside air humidity of motor.

4. This prevent terminal box structure of motor condensation through set up the baffle in the terminal box planking, is upper portion condensation chamber and lower part water storage chamber with the condensation cavity, and the limbers that the condensation passes through the baffle is saved to lower part water storage intracavity, can effectively prevent that the comdenstion water of storing from getting back to the motor once more.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a front view of an embodiment of a junction box structure for preventing motor condensation according to the present invention;

FIG. 2 is a cross-sectional view of an embodiment of a junction box structure for preventing motor condensation according to the present invention;

FIG. 3 is an exploded view of an embodiment of a junction box structure for preventing motor condensation according to the present invention;

FIG. 4 is a schematic view of an inner plate structure of a junction box according to an embodiment of the junction box structure for preventing motor condensation of the present invention;

FIG. 5 is a schematic structural view of an outer plate of the junction box according to the embodiment of the junction box structure for preventing motor condensation;

FIG. 6 is a schematic view of an overflow port structure of an embodiment of the junction box structure for preventing motor condensation according to the present invention;

FIG. 7 is a schematic view of the junction box structure for preventing motor condensation according to an embodiment of the present invention.

In the figure: 1. a junction box housing; 2. a junction box inner plate; 3. a junction box outer plate; 4. a cavity; 5. a transom window in the junction box; 6. a partition plate; 7. an overflow port; 8. a condensing assembly; 81. a condensation column; 9. a heat dissipating component; 91. a heat sink; 10. a water through hole; 11. an upper condensing chamber; 12. a lower water storage chamber; 13. an inner power line inlet; 14. an outer power line inlet; 15. a water discharge hole; 16. and (4) a water discharging bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, a junction box structure for preventing motor condensation includes a junction box housing 1, a junction box inner panel 2 and a junction box outer panel 3.

The junction box outer shell 1 is provided with an open end, the junction box inner plate 2 is detachably covered on the open end of the junction box outer shell 1, and the junction box outer plate 3 is fixed on the outer side wall of the junction box inner plate 2 and forms a condensation cavity 4 with the junction box inner plate 2.

And the upper part of the junction box inner plate 2 is provided with a junction box inner plate air window 5 for communicating the inner cavity of the junction box shell 1 with the condensation cavity 4.

When the motor runs, the temperature of the stator of the motor rises to cause the temperature of gas in the motor to rise, heated air enters the cavity of the junction box shell 1 through the mounting end of the junction box shell 1, the air in the cavity of the junction box shell 1 can be heated by a power line at the same time, and hot air enters the condensation cavity 4 between the junction box inner plate 2 and the junction box outer plate 3 through the junction box inner plate louver 5 on the junction box inner plate 2; the contact of 3 outsides of terminal box planking and atmospheric environment belongs to relative low temperature, and hot-air and the contact of 3 inner walls of terminal box planking in condensation cavity 4, because the temperature drop, moisture in the gas can be appeared, forms the comdenstion water, along with the operation vibration of motor, the comdenstion water can fall to in the condensation cavity 4 to guarantee that the condensation can not contact the inner line, avoided the condensation to the insulating destruction of power supply line and corruption, improve driving motor's reliability.

Referring to fig. 2 and 5, a condensing assembly 8 is disposed in the condensing cavity 4, the condensing assembly 8 includes a condensing portion disposed in the condensing cavity, and the condensing portion exchanges heat with air in the condensing cavity 4 to condense the water vapor to form condensation, so that moisture in the hot air can be separated out quickly, and air humidity in the motor can be reduced;

the condensing part is a condensing sheet; or condensation post 81, the one end of condensation post 81 and the inner wall fixed connection of terminal box planking 3, the other end extends the setting towards terminal box inner panel 2, has certain interval between the other end of condensation post 81 and the terminal box inner panel 2, and condensation post 81 is even is provided with a plurality of, and hot-air and the lower condensation post 81 contact of temperature can make moisture precipitate fast, reduce the inside air humidity of motor.

Referring to fig. 2 and 3, a water outlet 15 communicated with the condensation cavity 4 is formed at the bottom of the junction box outer plate 3, and a water discharge control device for controlling the opening/closing of the water discharge hole is mounted on the water outlet 15;

the drainage control device is a drainage valve; or a plug bolt 16 detachably attached to the drain opening 15, wherein the drain opening 15 is closed when the plug bolt 16 is attached, and the drain opening 15 is opened when the plug bolt 16 is detached.

Referring to fig. 6, an overflow port 7 communicated with the condensation cavity 4 is formed in the junction box outer plate 3, a certain interval is formed between the overflow port 7 and the bottom wall of the condensation cavity 4, so that certain condensed water can be accumulated, and the condensed water in the condensation cavity 4 is discharged after being collected to the overflow port 7, so that excessive accumulation of the condensed water in the condensation cavity 4 is avoided, and the condensed water is prevented from flowing back to the junction box shell 1 through the junction box inner plate air window 5.

Referring to fig. 1 and 3, the outer wall of the junction box outer plate 3 is provided with a heat dissipation assembly 9, which includes a heat dissipation portion, the heat dissipation portion dissipates heat to the junction box outer plate by using the heat conduction principle, and the heat dissipation portion can rapidly reduce the temperature of the junction box outer plate 3 and the condensation assembly 8, so as to rapidly separate out moisture and reduce the air humidity inside the motor.

The heat dissipation part is a heat dissipation column; or the radiating fins 91 and the radiating fins 91 are fixed on the outer wall of the junction box outer plate 3, the radiating fins 91 are uniformly provided with a plurality of radiating fins 91, when a vehicle runs, airflow in the external environment can pass through the radiating fins 91, the junction box outer plate 3 and the condensing assembly 8 can be kept at relatively low temperature all the time, and water in high-temperature gas in the motor can be kept to be analyzed.

Referring to fig. 2 and 5, a partition plate 6 is disposed on an inner wall of the junction box outer plate 3, when the junction box inner plate 2 and the junction box outer plate 3 are assembled, an outer wall of the partition plate 6 is attached to an outer wall of the junction box inner plate 2, the partition plate 6 divides the cavity 4 into an upper condensation chamber 11 and a lower water storage chamber 12, a water through hole 10 for communicating the upper condensation chamber 11 with the lower water storage chamber 12 is formed in the middle of the partition plate 6, the condensation component 8 is disposed in the upper condensation chamber 11, and the lower water storage chamber 12 is communicated with an external environment through a water outlet 15.

The lower water storage chamber 12 has a certain volume to store a certain amount of condensed water. During the stop operation of the vehicle, if the condensed water stored in the water storage tank is evaporated into water vapor, only a part of the condensed water flows upwards through the water through holes 10 and is condensed into condensed water again when passing through the junction box outer plate 3, so that the stored condensed water can be effectively prevented from being returned to the motor again.

Referring to fig. 1-3, the inner and outer terminal box plates are fastened to the open end of the housing by the same connector to facilitate assembly of the inner and outer terminal box plates.

Referring to fig. 7, a junction box housing 1 is assembled on an outer wall of a motor main body, an inner power line inlet 13 is formed at an installation end of the junction box housing 1 for facilitating connection of a power line and a stator line, an outer power line inlet 14 is formed on the outer wall of the junction box housing 1 for facilitating connection of an external power line, and after the connection of the external power line, the outer power line inlet 14 is in a sealed state, a condensation cavity 4 is in a vertical state, an upper condensation cavity 11 is located at an upper portion of a lower water storage cavity 12, when the motor works, hot air is in contact with an inner wall of a junction box outer plate 3 and a condensation component 8 in the condensation cavity 4, and due to temperature reduction, moisture in gas is separated out to form condensed water, and the condensed water falls into the lower water storage cavity 12 along with operation vibration of the motor, thereby ensuring that the condensed water does not contact with an internal circuit, and avoiding damage and corrosion of the condensed water to a power line insulation, the reliability of the driving motor is improved.

The working principle is as follows: before the motor is used, the junction box and the motor main body are assembled together, after the motor is fixedly installed, the condensation cavity 4 is in a vertical state, the upper condensation cavity 11 is positioned at the upper part of the lower water storage cavity 12, when the motor works, the temperature of the stator of the motor rises to cause the temperature of gas in the motor to rise, the heated air enters the inner cavity of the junction box shell 1 through the inner power line inlet 13, the air in the inner cavity of the junction box shell 1 can be heated by an outer power line at the same time, the hot air enters the condensation cavity 4 between the junction box inner plate 2 and the junction box outer plate 3 through the junction box inner plate air window 5 on the junction box inner plate 2, the hot air is contacted with the inner wall of the junction box outer plate 3 and the condensation component 8 in the condensation cavity 4, and due to the temperature reduction, moisture in the gas can be separated out to form condensed water, and the condensed water can fall into the lower water storage cavity 12 along with the operation vibration of the motor, therefore, the condensation is prevented from contacting with an internal circuit, the damage and corrosion of the condensation to the insulation of a power supply circuit are avoided, and the reliability of the driving motor is improved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides a prevent terminal box structure of motor condensation which characterized in that: the junction box comprises a junction box shell, a junction box inner plate and a junction box outer plate;

the junction box outer shell is provided with an open end, the junction box inner plate is detachably covered on the open end of the junction box outer shell, the junction box outer plate is fixed on the outer side wall of the junction box inner plate, and a condensation cavity is formed between the junction box outer plate and the junction box inner plate;

and the upper part of the junction box inner plate is provided with a junction box inner plate louver used for communicating the inner cavity of the junction box shell with the condensation cavity.

2. The motor-condensation-preventing junction box structure of claim 1, wherein: the condensation cavity is internally provided with a condensation component, the condensation component comprises a condensation part arranged in the condensation cavity, and the condensation part and air in the condensation cavity are subjected to heat exchange to condense water vapor to form condensation.

3. The motor-condensation-preventing junction box structure of claim 2, wherein: the condensation part is a condensation column, one end of the condensation column is fixedly connected with the inner wall of the junction box outer plate, the other end of the condensation column extends towards the junction box inner plate, and a certain interval is formed between the other end of the condensation column and the junction box inner plate.

4. The motor-condensation-preventing junction box structure of claim 2, wherein: and a water outlet communicated with the condensation cavity is formed in the bottom of the junction box outer plate, and a water drainage control device for controlling the opening/closing of the water drainage hole is installed on the water outlet.

5. The motor-condensation-preventing junction box structure of claim 4, wherein: the drainage control device is a blocking bolt which is detachably arranged on the water outlet, the water outlet is closed when the blocking bolt is arranged, and the water outlet is opened when the blocking bolt is detached.

6. The motor-condensation-preventing junction box structure of claim 4, wherein: an overflow port communicated with the condensation cavity is formed in the outer plate of the junction box, a certain interval is formed between the overflow port and the bottom wall of the condensation cavity, and when condensed water in the condensation cavity is collected to the overflow port, the condensed water is discharged.

7. The motor-condensation-preventing junction box structure of claim 1, wherein: the outer wall of the junction box outer plate is provided with a heat dissipation assembly, the heat dissipation assembly comprises a heat dissipation part, and the heat dissipation part dissipates heat to the junction box outer plate by utilizing the heat conduction principle.

8. The motor-condensation-preventing junction box structure of claim 7, wherein: the heat dissipation part is a heat dissipation fin, and the heat dissipation fins are fixed on the outer wall of the junction box outer plate.

9. The motor-condensation-preventing junction box structure of claim 4, wherein: the inner wall of terminal box planking is equipped with the baffle, and when terminal box inner panel and terminal box planking assembly, the outer wall of baffle and the outer wall of terminal box inner panel laminated mutually, the baffle separates the condensation cavity for upper portion condensation chamber and lower part water storage chamber, the limbers that are used for communicateing upper portion condensation chamber and lower part water storage chamber are seted up to the baffle, the condensation subassembly sets up in upper portion condensation intracavity, the outlet is linked together lower part water storage chamber and external environment.

10. The motor-condensation-preventing junction box structure of claim 1, wherein: the junction box inner plate and the junction box outer plate are fastened at the open end of the junction box shell through the same connecting piece.

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