CN115696866A - Outdoor cabinet of inverter - Google Patents

Abstract

The application relates to an outdoor cabinet of an inverter, which relates to the technical field of photovoltaic inverters, and comprises a protection box, wherein an installation box for installing the inverter is arranged in the protection box; the protection box is internally provided with a ventilation device, and the ventilation device comprises an air exhaust assembly and an exhaust assembly; a dehumidifying device is arranged between the protection box and the installation box; the dehumidification device comprises a hot air assembly and a cold air assembly, the hot air assembly comprises a plurality of hot air baffles, a hot air channel is formed between every two adjacent hot air baffles, the cold air assembly comprises a cooling plate and a plurality of cold air baffles, a cold air channel is formed between every two adjacent cold air baffles, and the cooling plate is arranged on the side wall of the cold air channel; the hot air channel is communicated with the cold air channel, and the air exhaust assembly can exhaust air into the hot air channel and the cold air channel. The air heating device can realize the heating of air flow through the arrangement of the hot air channel, and reduce the relative humidity in the air; moisture in the air current can be condensed through the cold air channel and the cooling plate, and the absolute humidity in the air is reduced.

Description

Outdoor cabinet of inverter

Technical Field

The application relates to the technical field of photovoltaic inverters, in particular to an outdoor cabinet of an inverter.

Background

The photovoltaic inverter is a very important device, which can adjust the working condition of the power supply under normal conditions, and plays a role in lifting weight and light weight in the whole working circuit. Photovoltaic inverters are primarily capable of changing the nature of the current, converting the operation of the circuit, in a photovoltaic system and are therefore referred to as inverters. The photovoltaic inverter commonly used in life is mainly divided into two types, namely, the photovoltaic inverter for an independent power supply, and the photovoltaic inverter mainly has the function of converting the current of a direct current power supply into alternating current in the working process, and the process is the inversion process. And the photovoltaic inverter for grid connection can adjust the current in a mixed circuit, adjust the voltage difference between different line sections and ensure that the circuits of all parts can be integrated. At present, due to the rapid development of the photovoltaic industry, the photovoltaic inverter becomes an indispensable device for people's life, and gradually enters every household.

At present, solar energy is a renewable clean energy source, and has huge commercial potential and environmental protection benefit, photovoltaic power generation is widely regarded in the world, photovoltaic power generation technology is also perfected day by day, and a high-power photovoltaic inverter can efficiently convert direct current generated by a photovoltaic panel into alternating current for direct use or be incorporated into a power grid. Most of existing photovoltaic inverters adopt a natural cooling or air cooling mode for heat dissipation, the heat dissipation mode can be suitable for some situations, but under the condition of high air humidity, internal inverter elements are easily affected with damp, and the inverter is damaged.

In the related art, although the problem of partial heat dissipation can be solved, in the presence of humid air, the control box still easily makes the internal inverter wet, which leads to damage of the inverter.

Disclosure of Invention

The purpose of this application is to provide an inverter outdoor cabinet that can guarantee the ambient humidity of inverter.

The application provides an outdoor cabinet of inverter adopts following technical scheme:

an outdoor inverter cabinet comprises a protection box, wherein an installation box for installing an inverter is arranged in the protection box; the protection box is internally provided with a ventilation device, and the ventilation device comprises an air extraction component capable of extracting air into the installation box and an exhaust component capable of exhausting the air out of the installation box; a dehumidification device is arranged between the protection box and the installation box and is arranged between the air exhaust assembly and the exhaust assembly; the dehumidification device comprises a hot air assembly and a cold air assembly, the hot air assembly comprises a plurality of hot air baffles, the hot air baffles are arranged between the inner wall of the protection box and the outer wall of the installation box at intervals, a hot air channel is formed between every two adjacent hot air baffles, the cold air assembly comprises a cooling plate and a plurality of cold air baffles, the cold air baffles are arranged between the inner wall of the protection box and the outer wall of the installation box at intervals, a cold air channel is formed between every two adjacent cold air baffles, and the cooling plate is arranged on the side wall of the cold air channel; the hot air channel is communicated with the cold air channel, the hot air channel is communicated with the cold air channel into the installation box, and the air exhaust assembly can suck air into the hot air channel and the cold air channel.

By adopting the technical scheme, the installation position can be provided for the inverter through the installation of the installation box, and the protection box can provide protection for the inverter; the ventilation device can realize the air flow in the protection box through the arrangement of the air extraction component and the exhaust component, thereby realizing the heat dissipation function; the air exhaust assembly and the air exhaust assembly are communicated with a dehumidifying device, the dehumidifying device can enable air flow to flow from the hot air channel and the cold air channel through the arrangement of the hot air channel and the cold air channel, so that the air flow can be in full contact with the wall of the installation box, the air flow can radiate the wall of the installation box, meanwhile, the wall of the installation box can heat the air flow, the relative humidity in the air can be reduced, and meanwhile, the redundant hot air channel and the cold air channel enable the air flow to reduce the humidity in the air in a low-temperature drying mode; set up the cooling plate in the cold wind passageway, can realize the condensation of moisture in the air through the mode of cooling to reduce the moisture in the air, reduce air temperature simultaneously, can increase the radiating effect of dc-to-ac converter in the install bin.

Optionally, the air exhaust assembly includes an air exhaust pipeline, one end of the air exhaust pipeline is communicated to the outside of the protection box, the other end of the air exhaust pipeline is communicated with the hot air channel and the cold air channel, and an air exhaust fan is arranged in the air exhaust pipeline; the exhaust assembly comprises an exhaust fan and an exhaust pipeline, one end of the exhaust pipeline is communicated to the outside of the protection box, the other end of the exhaust pipeline is communicated to the inside of the installation box, and the exhaust fan is arranged in the exhaust pipeline.

Through adopting above-mentioned technical scheme, the extraction fan can realize automatic bleeding, and the air discharge fan can be used for self-bleeding, and exhaust duct are used for the direction of air current, and in exhaust duct one side intercommunication cold wind passageway or hot-blast channel can guarantee that the air current gets into the install bin after can dehumidifying, climbs in pipeline one end intercommunication install bin, realizes the discharge of the interior gas of install bin.

Optionally, one side of the air exhaust pipeline is communicated with the cavity in the installation box, a first stop valve and a second stop valve are arranged on the air exhaust pipeline, the first stop valve is arranged at one end of the air exhaust pipeline communicated with the installation box, and the second stop valve is arranged at one side of the air exhaust pipeline communicated with the hot air channel or the cold air channel; and a third stop valve is arranged on the exhaust pipeline and is arranged on the exhaust pipeline.

By adopting the technical scheme, one side of the air exhaust pipeline is directly connected with the installation box, so that air flow can directly enter the installation box for heat dissipation; the first stop valve can control the conduction and the sealing of the air exhaust pipeline and the installation box, the second stop valve can control the conduction and the sealing of the air exhaust pipeline and the cold air channel or the hot air channel, and the cooperation of the first stop valve and the second stop valve can select whether to connect the air flow into the dehumidifying device for dehumidifying; the third stop valve can control the conduction and the closure of the exhaust pipeline and the mounting box, and the third stop valve is matched with the first stop valve and the second stop valve to close the mounting box, so that the air flow of the mounting box is reduced, and the fire condition can be inhibited when the inverter catches fire.

Optionally, a dust removal device is further arranged in the protection box, the dust removal device comprises a filter screen, a dust removal fan and a dust removal pipeline, the filter screen is arranged in the air exhaust pipeline, the dust removal fan is arranged in the dust removal pipeline, one end of the dust removal pipeline is communicated to the outside of the protection box, the other end of the dust removal pipeline is communicated to the air exhaust pipeline, and a fourth stop valve is arranged at the communication position of the dust removal pipeline and the air exhaust pipeline.

By adopting the technical scheme, the arrangement of the filter screen can filter the dust in the air flow; the cooperation setting of dust removal pipeline and dust removal fan for dust removal pipeline and air exhaust duct communicate each other, cooperate the fourth stop valve, can blow off the dust on the filter screen among the air exhaust duct from the air exhaust duct when making dust removal fan rotate, realize the dust treatment of filter screen.

Optionally, the exhaust duct and the air exhaust duct are all obliquely arranged in the vertical direction, and the air exhaust duct and one end of the exhaust duct, which is close to the installation box, are all higher than one end of the installation box in the vertical direction.

Through adopting above-mentioned technical scheme, the exhaust duct and the bleed duct that the slope set up can prevent that the rainwater from flowing into the protection box, also can prevent simultaneously that the dust from piling up at the pipeline mouth of bleed duct.

Optionally, a drain pipe is arranged in the protection box, the drain pipe is obliquely arranged in the vertical direction, one end of the drain pipe, which is high in the vertical direction, is communicated into the cold air channel, and one end of the drain pipe, which is low in the vertical direction, is communicated to the outside of the installation box.

Through adopting above-mentioned technical scheme, the setting of drain pipe can be with the comdenstion water discharge guard box that exists in the cold wind passageway.

Optionally, a plurality of humidity sensors and a plurality of temperature sensors are arranged on the protection box, and a smoke sensor is arranged in the installation box.

By adopting the technical scheme, the temperature and the humidity can be detected by the temperature sensor and the humidity sensor, so that the access of the air dehumidifying device is controlled; the smoke sensor is arranged to detect the ignition condition of the inverter.

Optionally, an installation door is arranged on one side of the protection box, one side of the installation door is hinged to the protection box, a sealing door is arranged on one side, far away from the inner cavity of the protection box, of the installation door, and the sealing door is hinged to one side of the protection box.

Through adopting above-mentioned technical scheme, the leakproofness of shutter can be improved to the double-deck door setting of sealing door and shutter on the guard box.

Optionally, the inner wall of the installation box is an insulating heat conduction layer made of insulating heat conduction materials, and the main body of the installation box is made of heat conduction materials.

By adopting the technical scheme, the insulating heat-conducting layer arranged in the installation box can prevent the electric leakage of the inverter on the premise of ensuring heat conduction; the installation box main part adopts the heat conduction material to make and can guarantee that the installation box can dispel the heat.

In summary, the present application includes at least one of the following beneficial technical effects:

1. according to the air flow cooling device, the air flow can flow from the hot air channel and the cold air channel through the arrangement of the hot air channel and the cold air channel, so that the air flow can be in full contact with the wall of the installation box, the air flow can dissipate the wall of the installation box, meanwhile, the wall of the installation box can heat the air flow, the relative humidity in the air can be reduced, and meanwhile, the redundant hot air channel and the cold air channel can enable the air flow to reduce the humidity in the air in a low-temperature drying mode; set up the cooling plate in the cold wind passageway, can realize the condensation of moisture in the air through the mode of cooling to reduce the moisture in the air, reduce air temperature simultaneously, can increase the radiating effect of dc-to-ac converter in the install bin.

2. The access of the dehumidifying device can be selected through the arrangement of the first stop valve and the second stop valve, and the applicability of the outdoor cabinet of the inverter is improved.

3. The setting through double-deck door on first stop valve, second stop valve and third stop valve and the guard box can improve the leakproofness of outdoor cabinet, guarantees to reduce the air flow when the dc-to-ac converter catches fire to restrain the condition of a fire.

Drawings

Fig. 1 is a schematic view of the overall structure of an outdoor cabinet in the present application.

Fig. 2 is a schematic sectional view of an outdoor cabinet according to the present application.

Fig. 3 is a schematic view of the overall structure of the dehumidification device of the outdoor cabinet in the present application.

Fig. 4 is a schematic sectional view of a dehumidifying apparatus in an outdoor cabinet according to the present application.

Fig. 5 is a schematic sectional view of the drainage pipe in the outdoor cabinet of the present application.

Fig. 6 is a schematic sectional view of the outdoor cabinet dust removal duct in the present application.

Fig. 7 is a schematic diagram of the location of the temperature sensor and humidity sensor in the outdoor cabinet of the present application.

In the figure, 1, a protection box; 11. installing a door; 12. a sealing door; 2. installing a box; 21. locking the door; 3. a ventilation device; 31. an air extraction assembly; 311. an air extracting fan; 312. an air extraction pipeline; 313. a first shut-off valve; 314. a second stop valve; 32. an exhaust assembly; 321. an exhaust fan; 322. an exhaust duct; 323. a third stop valve; 4. a dehumidifying device; 41. a hot air assembly; 411. a hot air baffle; 412. a hot air passage; 413. a heating module; 42. a cold air assembly; 421. a cold air baffle; 422. a cold air passage; 423. a cooling plate; 43. a vent; 44. a drain pipe; 5. a dust removal device; 51. a dust removal pipeline; 52. a dust removal fan; 53. a filter screen; 54. a fourth stop valve; 6. a temperature sensor; 7. a humidity sensor; 8. a smoke sensor.

Detailed Description

The present application is described in further detail below with reference to fig. 1-7.

An outdoor cabinet of an inverter, referring to fig. 1 and 2, comprises a protection box 1, wherein an installation box 2 is installed in the protection box 1, the bottom of the installation box 2 is fixed with the protection box 1, and the installation box 2 is arranged to provide a space for installing the inverter; the inner wall of the cavity in the installation box 2 is provided with an insulating heat conduction layer which is made of an aluminum oxide material, so that the electric leakage of the inverter can be prevented, and the normal heat dissipation can be ensured; the main body of the installation box 2 is made of a material which is heat-conducting and high in strength, and steel is adopted, so that the heat-conducting performance can be guaranteed, and the inverter can be protected.

Referring to fig. 2, a lockingdoor 21 is rotatably disposed at one side of the installation box 2, and the lockingdoor 21 can open or close the installation box 2, so as to facilitate installation of the inverter; a mountingdoor 11 is rotatably arranged on one side, close to the lockingdoor 21, of the protection box 1, and the mountingdoor 11 is used for opening and closing the protection box 1; the rotating shaft of theinstallation door 11 and the rotating shaft of the lockingdoor 21 are parallel to each other and respectively close to two opposite sides of the installation box 2, so that the sealing performance between theinstallation door 11 and the lockingdoor 21 can be improved.

Referring to fig. 2, a sealingdoor 12 is arranged on one side, away from the installation box 2, of theinstallation door 11, one side of the sealingdoor 12 is hinged to the protection box 1, a rotating shaft of the sealingdoor 12 and a rotating shaft of the lockingdoor 21 are parallel to each other and are close to each other, the sealing performance of the protection box 1 can be improved due to the double-layer door structure of the protection box 1, and the arrangement for improving the sealing performance can reduce air flowing so as to inhibit the possible fire condition of the inverter.

Referring to fig. 1 and fig. 2, a ventilation device 3 is arranged on a protection box 1, the ventilation device 3 includes anair extraction component 31, theair extraction component 31 includes anair extraction fan 311 and anair extraction pipeline 312, theair extraction fan 311 is installed in theair extraction pipeline 312, theair extraction fan 311 is arranged for automatically extracting air outside the protection box 1, and theair extraction pipeline 312 is used for guiding and circulating air flow; one end of theair extraction pipeline 312 is communicated to the outer side of the protection box 1, and the other end is communicated to the cavity in the installation box 2, so that theair extraction assembly 31 can directly extract air outside the protection box 1 into the installation box 2, and the air in the installation box 2 can flow conveniently, and heat dissipation is facilitated;

referring to fig. 1 and 2, the ventilation device 3 further includes anexhaust assembly 32, theexhaust assembly 32 includes anexhaust fan 321 and anexhaust duct 322, theexhaust fan 321 is installed in theexhaust duct 322, theexhaust fan 321 is configured to automatically draw air in the installation box 2, and theexhaust duct 322 is used for guiding airflow; one end of theexhaust pipeline 322 is communicated to the outside of the protection box 1, and the other end is communicated to the inside of the installation box 2, so that theexhaust component 32 can pump hot air in the installation box 2 out of the protection box 1, and air in the installation box 2 can flow conveniently;

referring to fig. 1 and 2, the cooperation of theexhaust assembly 32 and theair extraction assembly 31 can suck cold air outside the protection box 1 into the installation box 2, and discharge hot air in the installation box 2 out of the protection box 1, so that air exchange in the installation box 2 is realized, and heat dissipation of the inverter in the installation box 2 is facilitated.

Referring to fig. 2, theair exhaust duct 312 and theair exhaust duct 322 are both inclined in the vertical direction, and one end of theair exhaust duct 312 and one end of theair exhaust duct 322 close to the installation box 2 are higher than one end of theair exhaust duct 312 and one end of theair exhaust duct 322 far from the installation box 2 in the vertical direction, so that rainwater can be prevented from flowing into the installation box 2 from theair exhaust duct 312 and theair exhaust duct 322, and dust can be prevented from gathering in theair exhaust duct 312 and theair exhaust duct 322.

Referring to fig. 3 and 4, dehumidifying device 4 is arranged between the inner wall of protection box 1 and the outer wall of installation box 2, dehumidifying device 4 includes hot air component 41, hot air component 41 includes a plurality ofhot air baffle 411,hot air baffle 411 is arranged on the two sides and the top side opposite to the horizontal direction of installation box 2,hot air baffle 411 mutually fixed connection arranged on the two sides and the top side of installation box 2 along the horizontal direction, a plurality ofhot air baffle 411 is arranged at intervals in sequence along the direction perpendicular tohot air baffle 411 on installation box 2, so thathot air channel 412 is formed between adjacent hot air baffles 411, the setting ofhot air channel 412 can pass through the air flow, the air flow can contact with the wall of installation box 2, so that the wall of installation box 2 can heat the air flow.

Referring to fig. 3 and 4, aheating module 413 is arranged on the inner wall of the protection box 1 in thehot air channel 412, and theheating module 413 can provide a supplementary heat source to heat the air flow when the temperature of the wall of the installation box 2 is low and the air with low temperature and high humidity cannot be heated, so that the dehumidification function is realized; the setting ofheating module 413 can be simultaneously under the condition that the temperature is too low, the heating gets into the air current temperature of install bin 2, guarantees that the inverter is under normal operating temperature.

Referring to fig. 3 and 4, the dehumidifying apparatus 4 further includes acold air assembly 42, thecold air assembly 42 includes cold air baffles 421, the cold air baffles 421 are arranged between the adjacent hot air baffles 411 at intervals along a direction perpendicular to the hot air baffles 411, acold air channel 422 is formed between two adjacent cold air baffles 421, and thecold air channel 422 is arranged to allow air flow to pass through;

referring to fig. 3 and 4, acooling plate 423 is installed on an inner side wall of the protection box 1 in thecold air channel 422, and thecooling plate 423 is arranged to realize a cooling function, cool the high-temperature air flow so as to condense water in the air flow, and realize a dehumidification function; thecooling plate 423 is cooled by adopting a semiconductor, and can transfer the high temperature in thecold air channel 422 to the side wall of the protection box 1 and then transfer the high temperature out of the protection box 1; the setting ofcooling plate 423 can reduce the air current temperature when dehumidifying to change the gas temperature in install bin 2, guarantee can guarantee under the inverter is in normal operating temperature condition under the condition of high temperature.

Referring to fig. 3 and 4, thehot air baffle 411 and thecold air baffle 421 that are arranged at intervals on two opposite sides of the installation box 2 are provided with thevents 43 at positions close to the bottom of the installation box 2, thevents 43 are arranged at intervals in sequence along the direction perpendicular to thehot air baffle 411, and twoadjacent vents 43 in the direction perpendicular to thehot air baffle 411 are arranged on two sides of the installation box 2 respectively, the arrangement of thevents 43 ensures that thehot air channel 412 and thecold air channel 422 can be communicated with each other, so that the normal flow of the air flow is ensured, the positions of thevents 43 ensure that the air flow passes through the lengths of thehot air channel 412 and thecold air channel 422, so that the air flow can be fully contacted on the surface of the installation box 2, the installation box 2 is fully cooled, the wall of the installation box 2 can fully heat the air flow, and thecold air channel 422 can fully cool the air flow.

Referring to fig. 5,drain pipe 44 has been seted up to guard box 1 bottom,drain pipe 44 sets up at the vertical direction interval,drain pipe 44 communicates each other at the high one end of vertical direction andcold wind channel 422 of install bin 2 one side, thedrain pipe 44 other end orientation is kept away from and is extended outside guard box 1 with one side ofcold wind channel 422 interconnect,drain pipe 44 sets up comdenstion water dischargecold wind channel 422 in the cold wind pipeline, the setting ofdrain pipe 44 slope is convenient for the drainage ofdrain pipe 44 way,drain pipe 44 passes from guard box 1 bottom, make the comdenstion water can absorb some heats of box, can assist the heat dissipation.

Referring to fig. 3 and 4, one side of the air extraction duct 312 is communicated with the hot air channel 412 or the cold air channel 422, so as to ensure that the air flow in the air extraction duct 312 can be extracted into the dehumidifying apparatus 4 for dehumidification; the air extraction pipeline 312 is provided with a first stop valve 313, the first stop valve 313 is arranged at one end of the air extraction pipeline 312 communicated with the installation box 2, and the first stop valve 313 can control the connection and disconnection between the air extraction pipeline 312 and the installation box 2; the air exhaust pipeline 312 is further provided with a second stop valve 314, the second stop valve 314 is arranged on one side of the air exhaust pipeline 312 communicated with the hot air channel 412 or the cold air channel 422, the second stop valve 314 can control the conduction and the cut-off of the air exhaust pipeline 312 and the hot air channel 412 or the cold air channel 422, and the access of the dehumidifying device 4 can be selected according to requirements; the first stop valve 313, in cooperation with the second stop valve 314, can select whether the air extraction pipeline 312 is directly connected to the installation box 2 or the air extraction pipeline 312 is connected to the dehumidifying device 4 to dehumidify the air flow.

Referring to fig. 3 and 4, thethird stop valve 323 is provided in theexhaust duct 322, thethird stop valve 323 can close theexhaust duct 322 in the event of an ignition of the inverter, and a closed space in the mounting box 2 can be realized to alleviate the combustion of the inverter in accordance with the closing of thefirst stop valve 313 and thesecond stop valve 314 in theextraction duct 312.

Referring to fig. 1 and 6, a dust removing device 5 is further disposed between the protection box 1 and the installation box 2, the dust removing device 5 includes adust removing pipeline 51 and adust removing fan 52, thedust removing pipeline 51 and theair suction pipeline 312 are disposed in parallel at an interval, one side of thedust removing pipeline 51 is communicated with theair suction pipeline 312, thedust removing fan 52 is disposed in thedust removing pipeline 51, and the rotation of thedust removing fan 52 can drive an air flow to blow out dust from theair suction pipeline 312; meanwhile, thedust removal pipeline 51 can perform auxiliary air extraction, so that the air extraction effect of theair extraction assembly 31 is improved; the dust removing device 5 further comprises afilter screen 53, wherein thefilter screen 53 is arranged in theair extracting pipeline 312 and thedust removing pipeline 51 and can filter dust carried in the air flow;

referring to fig. 1 and 6, a fourth cut-offvalve 54 is arranged at a position where thedust removing duct 51 and theair suction duct 312 communicate with each other, the fourth cut-offvalve 54 can cut off thedust removing duct 51, and the fourth cut-offvalve 54 is arranged to be selectively connected to thedust removing duct 51; on one hand, thedust removing duct 51 can assist theair extracting assembly 31 to increase the flow of the extracted air, and on the other hand, can also remove dust from thefilter screen 53 in theair extracting duct 312.

Referring to fig. 5 and 7, a plurality oftemperature sensors 6 and a plurality ofhumidity sensors 7 are arranged outside the protection box 1, and can detect the temperature and humidity of the environment; a plurality ofhumidity sensors 7 and a plurality oftemperature sensors 6 are arranged in thehot air channel 412 and thecold air channel 422 respectively, and can detect the humidity of the air flow entering thehot air channel 412 and thecold air channel 422; the cooperation of thetemperature sensor 6 and thehumidity sensor 7 enables thefirst stop valve 313, thesecond stop valve 314, thethird stop valve 323, and theheating module 413 and thecooling plate 423 to be selectively opened and closed according to the temperature and humidity of the air flow during actual use.

Referring to fig. 7, a smoke sensor 8 is provided in the installation case 2 to detect smoke, that is, to detect whether a short-circuit fire condition occurs in the inverter, so as to control thefirst stop valve 313, thesecond stop valve 314, and thefourth stop valve 54 to close the installation case 2, and to block air by closing the installation case 2, thereby suppressing the fire condition of the inverter.

The implementation principle of the embodiment of the application is as follows: installing the inverter in the installation box 2, and then closing the lockingdoor 21 on the installation box 2, theinstallation door 11 and the sealingdoor 12 on the protection box 1 in sequence; theair exhaust fan 311 and theair exhaust fan 321 are started to dissipate heat, and the opening and closing of thefirst stop valve 313 and thesecond stop valve 314 are automatically adjusted according to the detection results of thehumidity sensor 7 and thetemperature sensor 6 outside the protection box 1;

when the air outside the protection box 1 is normal temperature and low humidity, thefirst stop valve 313 is opened, thesecond stop valve 314 is closed, and the air flow is introduced into the installation box 2 and discharged from theexhaust duct 322;

when high-temperature and low-humidity air exists outside the protection box 1, thefirst stop valve 313 is closed, thesecond stop valve 314 is opened, the air flow is guided into thehot air channel 412 and thecold air channel 422, the number of the coolingplates 423 is selected to be opened according to the detection results of thehumidity sensor 7 and thetemperature sensor 6, the air flow temperature is reduced, and the inverter is ensured to be at the normal working temperature;

when the outside of the protection box 1 is low-temperature and low-humidity air, thefirst stop valve 313 is closed, thesecond stop valve 314 is opened, the air flow is guided into thehot air channel 412 and thecold air channel 422, the number of theheating modules 413 is selected to be started according to the detection results of thehumidity sensor 7 and thetemperature sensor 6, the air flow temperature is increased, and the inverter is ensured to be at the normal working temperature;

when the air outside the protection box 1 is normal-temperature and high-humidity air, thefirst stop valve 313 is closed, thesecond stop valve 314 is opened, the air flow is guided into thehot air channel 412 and thecold air channel 422, the number of the coolingplates 423 and theheating modules 413 is selected to be opened according to the detection results of thehumidity sensor 7 and thetemperature sensor 6, the air flow is heated, and then the water is condensed;

when low-temperature and high-humidity air is outside the protection box 1, thefirst stop valve 313 is closed, thesecond stop valve 314 is opened, the air flow is guided into thehot air channel 412 and thecold air channel 422, thecooling plate 423 in the cold air channel is closed, and the air flow is fully contacted with the wall of the installation box 2 in thehot air channel 412 and thecold air channel 422, so that the temperature of the air flow is increased, the relative humidity in the air flow is reduced, and meanwhile, the installation box 2 is radiated; detecting the temperature of the air flow in real time according to thetemperature sensors 6 in thehot air channel 412 and thecold air channel 422, selecting the number of theheating modules 413 to be started, increasing the temperature of the air flow, and ensuring the normal humidity of the air flow;

when high-temperature and high-humidity air exists outside the protection box 1, thefirst stop valve 313 is closed, thesecond stop valve 314 is opened, the air flow is guided into thehot air channel 412 and thecold air channel 422, thecooling plate 423 in the cold air channel is opened, the air flow is cooled, moisture in the air flow is condensed and separated out, so that the absolute humidity of the air flow is reduced, meanwhile, the low-temperature air flow is fully contacted with the wall of the installation box 2 in thehot air channel 412 and thecold air channel 422, and the inverter is cooled; when thecooling plate 423 in thecold air channel 422 is opened, the real-time humidity of the air flow is detected according to thehumidity sensors 7 in thehot air channel 412 and thecold air channel 422, so that the humidity in thecold air channel 422 is in a normal range.

When the air flow speed needs to be increased and the heat dissipation rate needs to be increased, thethird stop valve 323 is opened, thedust removing fan 52 in theair extraction pipeline 312 is started, and the air inlet amount is increased;

when thefilter screen 53 is blocked, thefirst stop valve 313 and thesecond stop valve 314 are closed, thefourth stop valve 54 is opened, thesuction fan 311 is closed, and thedust removal fan 52 is opened, so that the air flow can impact thefilter screen 53 in theair suction pipeline 312, and the dust on thefilter screen 53 is blown out of theair suction pipeline 312;

when the smoke sensor 8 detects that the inverter in the installation case 2 is on fire, thefirst stop valve 313, thesecond stop valve 314, and thethird stop valve 323 are closed, so that the installation case 2 is in a relatively closed space, and the fire is suppressed.

The embodiments of the present invention are preferred embodiments of the present application, and the protection scope of the present application is not limited thereby, wherein like parts are denoted by like reference numerals. Therefore, the method comprises the following steps: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. An outdoor inverter cabinet comprises a protection box (1), and is characterized in that an installation box (2) for installing an inverter is arranged in the protection box (1); an air exchange device (3) is arranged in the protection box (1), and the air exchange device (3) comprises an air extraction assembly (31) capable of extracting air into the installation box (2) and an air exhaust assembly (32) capable of exhausting air out of the installation box (2);

a dehumidifying device (4) is arranged between the protection box (1) and the installation box (2), and the dehumidifying device (4) is arranged between the air extracting component (31) and the air exhausting component (32);

the dehumidification device (4) comprises a hot air assembly (41) and a cold air assembly (42), the hot air assembly (41) comprises a plurality of hot air baffles (411), the hot air baffles (411) are arranged between the inner wall of the protection box (1) and the outer wall of the installation box (2) at intervals, a hot air channel (412) is formed between every two adjacent hot air baffles (411), the cold air assembly (42) comprises a cooling plate (423) and a plurality of cold air baffles (421), the cold air baffles (421) are arranged between the inner wall of the protection box (1) and the outer wall of the installation box (2) at intervals, a cold air channel (422) is formed between every two adjacent cold air baffles (421), and the cooling plate (423) is arranged on the side wall of the cold air channel (422); the hot air channel (412) is communicated with the cold air channel (422), the hot air channel (412) and the cold air channel (422) are communicated into the installation box (2), and the air extracting assembly (31) can extract air into the hot air channel (412) and the cold air channel (422).

2. The inverter outdoor cabinet according to claim 1, wherein the air exhaust assembly (31) comprises an air exhaust duct (312), one end of the air exhaust duct (312) is communicated to the outside of the protection box (1), the other end of the air exhaust duct is communicated with the hot air passage (412) and the cold air passage (422), and an air exhaust fan (311) is disposed in the air exhaust duct (312);

the exhaust assembly (32) comprises an exhaust fan (321) and an exhaust pipeline (322), one end of the exhaust pipeline (322) is communicated to the outside of the protection box (1), the other end of the exhaust pipeline is communicated to the inside of the installation box (2), and the exhaust fan (321) is arranged in the exhaust pipeline (322).

3. The inverter outdoor cabinet according to claim 2, wherein one side of the air exhaust duct (312) is communicated with the cavity in the installation box (2), a first stop valve (313) and a second stop valve (314) are arranged on the air exhaust duct (312), the first stop valve (313) is arranged at one end of the air exhaust duct (312) communicated with the installation box (2), and the second stop valve (314) is arranged at one side of the air exhaust duct (312) communicated with the hot air channel (412) or the cold air channel (422);

a third stop valve (323) is arranged on the exhaust duct (322), and the third stop valve (323) is arranged on the exhaust duct (322).

4. The inverter outdoor cabinet according to claim 2, wherein a dust removing device (5) is further disposed in the protection box (1), the dust removing device (5) includes a dust removing pipeline (51), a dust removing fan (52) and a filter screen (53), the filter screen (53) is disposed in the air suction pipeline (312), the dust removing fan (52) is disposed in the dust removing pipeline (51), one end of the dust removing pipeline (51) is communicated to the outside of the protection box (1), the other end of the dust removing pipeline is communicated to the air suction pipeline (312), and a fourth stop valve (54) is disposed at a communication position of the dust removing pipeline (51) and the air suction pipeline (312).

5. The inverter outdoor cabinet according to claim 2, wherein the exhaust duct (322) and the air exhaust duct (312) are both disposed obliquely in a vertical direction, and ends of the air exhaust duct (312) and the exhaust duct (322) close to the installation box (2) are both higher than an end far away from the installation box (2) in the vertical direction.

6. The inverter outdoor cabinet according to claim 1, wherein a drain pipe (44) is arranged in the protection box (1), the drain pipe (44) is inclined in the vertical direction, one end of the drain pipe (44) which is high in the vertical direction is communicated to the cold air channel (422), and one end of the drain pipe (44) which is low in the vertical direction is communicated to the outside of the installation box (2).

7. The inverter outdoor cabinet according to claim 1, wherein a plurality of humidity sensors (7) and a plurality of temperature sensors (6) are disposed on the protection box (1), and a smoke sensor (8) is disposed in the installation box (2).

8. The outdoor inverter cabinet according to claim 1, wherein a mounting door (11) is disposed on one side of the protection box (1), the mounting door (11) is hinged to the protection box (1), a sealing door (12) is disposed on one side of the mounting door (11) away from the inner cavity of the protection box (1), and the sealing door (12) is hinged to one side of the protection box (1).

9. An outdoor inverter cabinet according to claim 1, wherein the inner wall of the mounting box (2) is made of an insulating and heat conducting material, and the main body of the mounting box (2) is made of a heat conducting material.

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