Waterproof structure for air duct of frequency converter

Abstract

The utility model discloses a frequency converter air duct waterproof structure, and relates to the field of frequency converters, the frequency converter air duct waterproof structure comprises a box body, a control panel is installed on the box body, a mounting plate is fixed in the box body, a circuit board is fixed on the mounting plate, uniformly distributed heat dissipation holes are formed in the two sides of the box body, and a waterproof mechanism is arranged in the box body. And a moisture-proof mechanism is arranged in the box body. Under the condition of severe strong wind and heavy rain, the waterproof mechanism protects the heat dissipation holes, outside rainwater cannot enter from the heat dissipation holes and then make contact with the circuit board, meanwhile, it can be guaranteed that the heat dissipation holes can be normally used, meanwhile, the damp-proof mechanism dehumidifies damp air entering the box body, and the service life of the box body is prolonged. Therefore, the heat dissipation holes can be used for heat dissipation, the possibility that rainwater enters the box body from the heat dissipation holes in severe weather and influences normal use of the circuit board is reduced, and meanwhile the possibility that damp air enters the box body and influences normal use of the circuit board can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of frequency converters, in particular to a frequency converter air duct waterproof structure. BACKGROUND

[0002] The frequency converter is mainly composed of rectification, filtering, inversion, braking unit, driving unit, detection unit, micro processing unit and the like. The frequency converter adjusts the voltage and frequency of the output power supply by opening and closing the internal IGBT, provides the required power supply voltage for the motor according to the actual needs of the motor, and thus achieves the purpose of energy saving and speed regulation. The frequency converter also has many protection functions, such as overcurrent, overvoltage, overload protection and the like.

[0003] When the frequency converter is working normally, the electronic components inside the frequency converter will generate heat. In order to enable the frequency converter to work normally and reduce the influence of overheat on the normal work of the frequency converter, evenly distributed heat dissipation holes are usually provided on the box body of the frequency converter to exchange air inside and outside the box body and achieve cooling of the frequency converter.

[0004] According to the installation needs, the frequency converter may be installed outdoors. In the case of severe weather such as strong wind and heavy rain, rainwater directly enters the box body from the heat dissipation holes of the frequency converter box body, which may cause short circuit failure of the frequency converter. CONTENT OF THE INVENTION

[0005] The present application aims to solve the problem of short circuit failure of the frequency converter caused by rainwater entering the box body from the heat dissipation holes of the frequency converter box body in the case of severe weather such as strong wind and heavy rain. The present application provides a frequency converter air duct waterproof structure.

[0006] In order to achieve the above-mentioned purpose, the present application specifically adopts the following technical scheme:

[0007] The frequency converter air duct waterproof structure comprises a box body, a control panel is installed on the box body, an installation plate is fixed in the box body, a circuit board is fixed on the installation plate, evenly distributed heat dissipation holes are provided on both sides of the box body, a waterproof mechanism is arranged in the box body, and a moisture-proof mechanism is arranged in the box body.

[0008] By adopting the above-mentioned technical scheme, in the case of severe weather such as strong wind and heavy rain, the waterproof mechanism protects the heat dissipation holes, so that the rainwater from outside will not enter the heat dissipation holes and contact the circuit board. At the same time, the moisture-proof mechanism can dehumidify the humid air entering the box body, so that the heat dissipation holes can be used normally, the possibility of rainwater entering the box body from the heat dissipation holes and affecting the normal use of the circuit board in severe weather is reduced, and the possibility of humid air entering the box body and affecting the normal use of the circuit board is also reduced.

[0009] Further, the waterproof mechanism comprises an exhaust fan fixed at the bottom of the box body, air inlet fans fixed at both sides of the box body, and water blocking assemblies arranged between the air inlet fans and the box body.

[0010] By using the above technical scheme, when it is windy and rainy, rainwater enters the heat dissipation holes, is blocked by the water blocking assemblies, and is then discharged from the water discharge openings, and the air in the box body is circulated by the exhaust fan and the air inlet fan, so that the possibility of rainwater entering the box body from the heat dissipation holes in heavy rain can be reduced, and the possibility of the position of the heat dissipation holes being blocked and affecting the air inlet amount can be reduced.

[0011] Further, the water blocking assembly comprises a water blocking plate one fixed on the air inlet fan, a water blocking plate two fixed at one end of the water blocking plate one away from the air inlet fan, and a water blocking plate two fixed at one end of the water blocking plate two away from the water blocking plate one and connected with the bottom of the box body, and the water blocking plate one and the water blocking plate two are at an angle, and the two sides of the water blocking plate one and the water blocking plate two are in contact with the box body and the mounting plate.

[0012] By using the above technical scheme, the water blocking plate one and the water blocking plate two are used to block the heat dissipation holes, so that when rainwater enters the heat dissipation holes, the rainwater is blocked by the water blocking plate one and the water blocking plate two, and then is discharged from the water discharge opening under the guidance of the water blocking plate one and the water blocking plate two, so that the rainwater entering the heat dissipation holes can be blocked and guided to be discharged.

[0013] Further, the air inlet fan is provided with an air filter plate, and the air filter plate is fixedly connected with the box body.

[0014] By using the above technical scheme, when the air inlet fan sucks external air from the heat dissipation holes, the air filter plate filters the air, so that the possibility of external dust particles entering the box body can be reduced.

[0015] Further, the moisture-proof mechanism comprises a condensation semiconductor fixed on the water blocking plate one, the condensation semiconductor penetrates through the water blocking plate one, the box body is provided with a heat dissipation groove at the back, the heat dissipation groove penetrates through the box body, and the box body is fixed with a heat dissipation fan at the back.

[0016] By using the above technical scheme, the condensation semiconductor is used to cool one side of the water blocking plate one close to the heat dissipation holes, when external air enters, the moisture in the external air condenses into water droplets on the condensation semiconductor, and then is discharged from the water discharge opening along the water blocking plate one and the water blocking plate two, so that the possibility of the air entering the box body being relatively humid and affecting the normal work of the circuit board in the box body can be reduced.

[0017] Further, the box body is provided with a blocking plate, the blocking plate is located above the heat dissipation groove, and the blocking plate, the water blocking plate one, the mounting plate and the box body are fixedly connected.

[0018] By adopting the technical scheme, the heat-emitting surface of the condensing semiconductor is isolated into the heat dissipation groove by the blocking plate, the heat dissipation groove is communicated with the outside, and thus the possibility that the heat-emitting surface of the condensing semiconductor affects the temperature in the box can be reduced.

[0019] Further, the condensing semiconductor is fixed with a metal condensing plate one, and the metal condensing plate one is fixed with uniformly distributed metal condensing plate twos.

[0020] By adopting the technical scheme, the moisture in the air is condensed into water droplets when contacting the metal condensing plate one and the metal condensing plate twos, so that the contact area of the humid air can be increased, and the condensation effect of the moisture in the air can be further improved.

[0021] Further, a plurality of uniformly distributed metal heat dissipation plates are arranged between the heat-emitting surfaces of the two condensing semiconductors, and the metal heat dissipation plates are fixedly connected with the two condensing semiconductors.

[0022] By adopting the technical scheme, the contact area of the heat-emitting surface of the condensing semiconductor and the air is increased by the metal heat dissipation plate, and then heat dissipation is performed by the heat dissipation fan, so that the possibility that the condensing semiconductor is affected by overheating to affect normal work can be reduced.

[0023] In summary, the present application has at least one of the following beneficial effects:

[0024] 1. In the present application, the water baffle one and the water baffle two are fixed near the heat dissipation hole in the box, when it is necessary to cool the inside of the box, the air inlet fan is started to make the air inlet fan enter the normal temperature air from the heat dissipation hole into the box, at the same time, the air filter plate is used to filter the outside air to reduce the possibility of dust entering the box, then the air enters the box in which the circuit board is installed and fixed under the guidance of the water baffle one and the water baffle two, at the same time, the exhaust fan at the bottom of the box is started to make the exhaust fan exhaust the hot air in the box, so that the air in the box is circulated by the air inlet fan and the exhaust fan, when heavy rain passes through the heat dissipation hole, the water baffle one and the water baffle two block the rainwater entering the heat dissipation hole, under the guidance of the water baffle one and the water baffle two, the blocked rainwater flows out of the box from the drain, so as to reduce the possibility that the rainwater enters the box from the heat dissipation hole of the box in heavy rain, and reduce the possibility that the position of the heat dissipation hole is blocked by the water baffle one and the water baffle two, affecting the air inlet amount.

[0025] 2, the application, by letting air in the guide of the baffle one and baffle two through the metal condensing plate one and metal condensing plate two, the moisture in the air condenses into water droplets when contact to the metal condensing plate one and metal condensing plate two, then drop on the baffle one and baffle two, then in the guide of the baffle one and baffle two from the drain, reaches the purpose of can reduce the air into the box is more humid, influence the normal work of the circuit board in the box. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the first three-dimensional structure schematic diagram of the frequency converter air duct waterproof structure in the application;

[0027] Figure 2 is the first internal three-dimensional structure schematic diagram of the frequency converter air duct waterproof structure in the application;

[0028] Figure 3 is the second internal three-dimensional structure schematic diagram of the frequency converter air duct waterproof structure in the application.

[0029] BRIEF DESCRIPTION OF DRAWINGS:

[0030] 1, the box; 2, the control panel; 3, the circuit board; 4, the waterproof mechanism; 41, the exhaust fan; 42, the air inlet fan; 43, the water baffle assembly; 431, the baffle one; 432, the baffle two; 44, the drain; 45, the air filter plate; 5, the moisture-proof mechanism; 51, the condensing semiconductor; 52, the heat sink groove; 53, the heat dissipation fan; 54, the barrier plate; 55, the metal condensing plate one; 56, the metal condensing plate two; 57, the metal heat dissipation plate; 6, the heat dissipation hole; 7, the mounting plate. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings Figure 1 -3 to make further detailed description of the application.

[0032] The embodiment of the application discloses a frequency converter air duct waterproof structure.

[0033] Referring to Figure 1 , Figure 2 and Figure 3 , the frequency converter air duct waterproof structure comprises a box 1, a control panel 2 is installed on the box 1, a mounting plate 7 is fixed in the box 1, a circuit board 3 is fixed on the mounting plate 7, heat dissipation holes 6 are evenly distributed on both sides of the box 1, a waterproof mechanism 4 is arranged in the box 1, and a moisture-proof mechanism 5 is arranged in the box 1.

[0034] When using this frequency converter, when the internal components of the frequency converter heat up, outside air enters the housing 1 through the heat dissipation holes 6, cooling the circuit board 3 inside the housing 1. In the event of severe wind and rain, the waterproof mechanism 4 protects the heat dissipation holes 6, preventing rainwater from entering through the holes and contacting the circuit board 3, thus ensuring the normal operation of the heat dissipation holes 6. At the same time, the moisture-proof mechanism 5 dehumidifies the humid air entering the housing 1, further reducing the possibility of humid air entering the housing 1 and affecting the normal operation of the circuit board 3. By using the waterproof mechanism 4 to protect the heat dissipation holes 6 and dehumidifying the incoming air, the possibility of rainwater entering the housing 1 through the heat dissipation holes 6 in severe weather and affecting the normal operation of the circuit board 3 can be reduced, while also reducing the possibility of humid air entering the housing 1 and affecting the normal operation of the circuit board 3.

[0035] Reference Figure 1 , Figure 2 and Figure 3 The waterproof mechanism 4 includes an exhaust fan 41 fixed to the bottom of the box 1, an air intake fan 42 fixed on both sides inside the box 1, a water-blocking component 43 between the air intake fan 42 and the box 1, and a drain outlet 44 on both sides of the box 1.

[0036] In addition, the water-blocking assembly 43 includes a water-blocking plate 431 fixed on the air intake fan 42. A water-blocking plate 432 is fixed at the end of the water-blocking plate 431 away from the air intake fan 42. The end of the water-blocking plate 432 away from the water-blocking plate 431 is fixedly connected to the bottom of the housing 1. The water-blocking plate 431 and the water-blocking plate 432 form an angle. The two sides of the water-blocking plate 431 and the water-blocking plate 432 are fixed to the housing 1 and the mounting plate 7.

[0037] Furthermore, an air filter plate 45 is provided on the air intake fan 42, and the air filter plate 45 is fixedly connected to the housing 1.

[0038] The water baffle one 431 and the water baffle two 432 are fixed in the box 1 near the heat dissipation hole 6. When the inside of the box 1 needs to be cooled, the air inlet fan 42 is started to make the air inlet fan 42 let the normal temperature air from the outside enter the box 1 from the heat dissipation hole 6, and then the air is filtered by the air filter plate 45 to reduce the possibility of dust entering the box 1, and then the air enters the box 1 where the circuit board 3 is installed and fixed under the guidance of the water baffle one 431 and the water baffle two 432, and the exhaust fan 41 at the bottom of the box 1 is started to make the exhaust fan 41 exhaust the hot air in the box 1, so that the air inlet fan 42 and the exhaust fan 41 circulate the air in the box 1 to reduce the influence of the water baffle one 431 and the water baffle two 432 on the air inlet amount of the heat dissipation hole 6. When heavy rain passes through the heat dissipation hole 6, the water baffle one 431 and the water baffle two 432 block the rainwater entering the heat dissipation hole 6, and the blocked rainwater flows out of the box 1 from the drain hole 44 under the guidance of the water baffle one 431 and the water baffle two 432. By blocking the heat dissipation hole 6 by the water baffle one 431 and the water baffle two 432, and increasing the amount of air circulation in the box 1 by the air inlet fan and the exhaust fan 41, the possibility of rainwater entering the box 1 from the heat dissipation hole 6 of the box 1 in heavy rain can be reduced, and the position of the heat dissipation hole 6 is blocked by the water baffle one 431 and the water baffle two 432, which can reduce the possibility of affecting the air inlet amount.

[0039] Referring to Figure 1 , Figure 2 and Figure 3 , the moisture-proof mechanism 5 includes a condensing semiconductor 51 fixed on the water baffle one 431, the condensing semiconductor 51 penetrates the water baffle one 431, the back of the box 1 is provided with a heat dissipation groove 52, the heat dissipation groove 52 penetrates the box 1, and the back of the box 1 is fixed with a heat dissipation fan 53.

[0040] In addition, a blocking plate 54 is arranged in the box 1, the blocking plate 54 is located above the heat dissipation groove 52, and the blocking plate 54 is fixedly connected with the water baffle one 431, the mounting plate 7 and the box 1.

[0041] Further, a metal condensing plate one 55 is fixed on the condensing semiconductor 51, and a plurality of metal condensing plate twos 56 are uniformly distributed on the metal condensing plate one 55.

[0042] In addition, a plurality of metal heat dissipation plates 57 are arranged between the heat dissipation surfaces of the two condensing semiconductors 51, and the metal heat dissipation plates 57 are fixedly connected with the two condensing semiconductors 51.

[0043] In the use of air inlet fan 42 from the air from the location of the heat dissipation hole 6 into the box 1, the air in the guide plate 431 and the guide plate 432 through the metal condenser plate 55 and metal condenser plate 56, the water in the air when contact with the metal condenser plate 55 and metal condenser plate 56 condensation into water droplets, and then drop on the guide plate 431 and the guide plate 432, and then in the guide plate 431 and the guide plate 432 guide from the drain 44, in the working of the condenser semiconductor 51, the heat dissipation surface of the condenser semiconductor 51 heat transfer to the metal heat sink 57, and then use the heat dissipation fan 53 on the metal heat sink 57 heat dissipation, reduce the possibility of condenser semiconductor 51 overheating, while using the barrier plate 54 to separate the heat dissipation groove 52 of the box 1, reduce the possibility of metal heat sink 57 heat into the box 1 inside, by allowing the outside air from the heat dissipation hole 6 through the metal condenser plate 55 and metal condenser plate 56, the water in the air condensation into water droplets, so as to reduce the air into the box 1 is more humid, affect the normal work of the circuit board 3 in the box 1 possibility.

[0044] Working principle: in the use of the frequency converter in the bad weather of strong wind and heavy rain, when the frequency converter inside heating, start air inlet fan 42, let the air inlet fan 42 from the outside of the normal temperature air from the heat dissipation hole 6 into the box 1. At the same time using air filter plate 45 to filter the outside air, and then in the guide plate 431 and the guide plate 432, let the air into the box 1 installed fixed with circuit board 3, while using the exhaust fan 41 at the bottom of the box 1, let the exhaust fan 41 of the hot air in the box 1, let the air inlet fan 42 and exhaust fan 41 of the air in the box 1 circulation, the guide plate 431 and the guide plate 432 to the rain into the heat dissipation hole 6, under the guide of the guide plate 431 and the guide plate 432, let the blocked rain from the drain 44 to the outside of the box 1, while making the condenser semiconductor 51 work, the air in the guide plate 431 and the guide plate 432 through the metal condenser plate 55 and metal condenser plate 56, the water in the air when contact with the metal condenser plate 55 and metal condenser plate 56 condensation into water droplets, and then drop on the guide plate 431 and the guide plate 432, and then in the guide plate 431 and the guide plate 432 guide from the drain 44, reduce the rain and humid air into the box 1 in the strong wind and heavy rain weather.

Claims

1. A waterproof structure for the air duct of a frequency converter, comprising a housing (1), characterized in that: The box (1) is equipped with a control panel (2), and a mounting plate (7) is fixed inside the box (1). A circuit board (3) is fixed on the mounting plate (7). Heat dissipation holes (6) are evenly distributed on both sides of the box (1). A waterproof mechanism (4) is provided inside the box (1). A moisture-proof mechanism (5) is provided inside the box (1).

2. The inverter duct waterproof structure according to claim 1, characterized in that: The waterproof mechanism (4) includes an exhaust fan (41) fixed at the bottom of the box (1), an air intake fan (42) fixed on both sides inside the box (1), a water-blocking component (43) between the air intake fan (42) and the box (1), and a drain outlet (44) opened on both sides of the box (1).

3. The inverter duct waterproof structure according to claim 2, characterized in that: The water-blocking assembly (43) includes a water-blocking plate one (431) fixed on the air intake fan (42). A water-blocking plate two (432) is fixed at the end of the water-blocking plate one (431) away from the air intake fan (42). The end of the water-blocking plate two (432) away from the water-blocking plate one (431) is fixedly connected to the bottom of the box body (1). The water-blocking plate one (431) and the water-blocking plate two (432) form an angle. The two sides of the water-blocking plate one (431) and the water-blocking plate two (432) are fixed to the box body (1) and the mounting plate (7).

4. The inverter duct waterproof structure according to claim 3, characterized in that: An air filter plate (45) is provided on the air intake fan (42), and the air filter plate (45) is fixedly connected to the housing (1).

5. The inverter duct waterproof structure according to claim 3, characterized in that: The moisture-proof mechanism (5) includes a condensation semiconductor (51) fixed on a baffle plate (431), the condensation semiconductor (51) penetrates the baffle plate (431), a heat dissipation groove (52) is provided on the back of the box (1), the heat dissipation groove (52) penetrates the box (1), and a heat dissipation fan (53) is fixed on the back of the box (1).

6. The inverter duct waterproof structure according to claim 5, characterized in that: The enclosure (1) is provided with a baffle plate (54), which is located above the heat dissipation groove (52). The baffle plate (54) is fixedly connected to the water baffle plate (431), the mounting plate (7), and the enclosure (1).

7. The inverter duct waterproof structure according to claim 5, characterized in that: A metal condensing plate (55) is fixed on the condensing semiconductor (51), and a uniformly distributed metal condensing plate (56) is fixed on the metal condensing plate (55).

8. The inverter duct waterproof structure according to claim 5, characterized in that: Several uniformly distributed metal heat sinks (57) are provided between the heat dissipation surfaces of the two condensing semiconductors (51), and the metal heat sinks (57) and the two condensing semiconductors (51) are fixedly connected.

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