CN216391853U - Communication cabinet dust collector and communication cabinet - Google Patents

Abstract

The utility model relates to a communication rack dust collector and communication rack, communication rack dust collector include the cabinet body, dust absorption subassembly, air inlet blast gate and inboard dust screen, the inner chamber of the cabinet body includes that mutually independent communication equipment holds chamber and air inlet chamber, inboard dust screen sets up communication equipment holds between chamber and the air inlet chamber, dust absorption subassembly and air inlet blast gate set up the air inlet intracavity, be provided with preceding wind window on the preceding cabinet door of the cabinet body, dust absorption subassembly sets up the rear of preceding wind window is located the bottom in air inlet chamber, inboard dust screen is relative with the dust absorption subassembly interval, the air inlet blast gate sets up the rear of preceding wind window is located the top of dust absorption subassembly. The communication cabinet dust collector has the advantages that dust of the inner layer dustproof net is automatically and intelligently controlled to be removed, and long-term reliable normal work of a direct ventilation system of the communication cabinet is guaranteed.

Description

Communication cabinet dust collector and communication cabinet

Technical Field

This application belongs to communication technology field, especially relates to a communication rack dust collector and communication rack.

Background

Adopt radiating communication rack of new trend, its dust keeper places in the rack inside the air intake, forms plane wind channel with the air intake almost, easy jam, difficult clearance, and only manual cleaning. Particularly, in northern areas, the sand blown by wind is large, the period is long, and frequent cleaning is needed.

The dust screen can only be changed or cleared up through opening the cabinet door by manpower, and the maintenance efficiency is low, and the maintenance cost is high.

Disclosure of Invention

The technical problem that this application will solve is: to current adoption new trend radiating communication rack, the dust screen can only carry out artifical change or clearance through opening the cabinet door, and the problem that maintenance efficiency is low, the maintenance cost is high provides a communication rack dust collector and communication rack.

In order to solve the technical problem, on one hand, the embodiment of the application provides a communication cabinet dust removal device, which comprises a cabinet body, a dust collection assembly, an air inlet valve and an inner side dust screen, wherein an inner cavity of the cabinet body comprises a communication equipment accommodating cavity and an air inlet cavity which are mutually independent, the inner side dust screen is arranged between the communication equipment accommodating cavity and the air inlet cavity, the dust collection assembly and the air inlet valve are arranged in the air inlet cavity, a front air window is arranged on a front cabinet door of the cabinet body, the dust collection assembly is arranged behind the front air window and positioned at the bottom of the air inlet cavity, the inner side dust screen is opposite to the dust collection assembly at intervals, and the air inlet valve is arranged behind the front air window and positioned above the dust collection assembly;

when the air inlet air valve is closed, the dust collection assembly can discharge dust on the inner side dust screen to the outside of the cabinet body through the front air window.

Optionally, the communication cabinet dust collector further includes an outer dust screen disposed outside the front windshield.

Optionally, the outer dustproof net comprises an outer layer of dustproof net, an outer two layers of dustproof net and an outer three layers of dustproof net which are arranged in sequence from inside to outside, and the mesh number of the inner layer of dustproof net, the outer two layers of dustproof net and the outer three layers of dustproof net is reduced in sequence;

outer one deck dust screen, outer two layers dust screen and outer three-layer dust screen are the opening orientation "Contraband" shape of preceding wind window, the opening of outer one deck dust screen, outer two layers dust screen and outer three-layer dust screen is connected in the outside of the cabinet body and is covered preceding wind window, upper surface, lower surface, left surface, right surface and the preceding side surface of outer one deck dust screen, outer two layers dust screen and outer three-layer dust screen all can be used to the air inlet.

Optionally, the mesh number of the inner dustproof net is not less than 80 meshes, the mesh number of the outer layer of dustproof net is not less than 20 meshes, the mesh number of the outer two layers of dustproof nets is not less than 14 meshes, and the mesh number of the outer three layers of dustproof nets is not less than 10 meshes.

Optionally, the dust collection assembly includes a frame and a centrifugal fan mounted on the frame, a front side opening of the frame faces the front windshield, a front side end face of the frame is tightly attached to an inner side surface of a front cabinet door of the cabinet body, a rear side plate of the frame faces the inner side dust screen, a through hole communicated with an inlet of the centrifugal fan is formed in the rear side plate of the frame, and an outlet of the centrifugal fan is located in the frame;

the centrifugal fan is started when the air inlet valve is closed, and vacuum is formed in the air channel of the centrifugal fan through rotation of the centrifugal fan, so that high negative pressure is formed inside and outside the air channel of the centrifugal fan, dust on the inner side dust screen is sucked into the air channel of the centrifugal fan and is discharged to the outside of the cabinet body through the front air window.

Optionally, the dust collection assembly further comprises a dustproof baffle, and the dustproof baffle is rotatably connected to the frame;

when the centrifugal fan is not started, the dustproof baffle plate falls down by means of gravity and closes the outlet of the centrifugal fan; when the centrifugal fan is started, the dustproof blocking piece rotates by means of wind power generated by the centrifugal fan and opens the outlet of the centrifugal fan.

Optionally, the communication cabinet dust removal device further comprises a controller and a differential pressure sensor, the differential pressure sensor and the air inlet valve are respectively in signal connection with the controller, and the differential pressure sensor is used for detecting the pressure difference between two sides of the inner dustproof net so as to detect the dust concentration on the inner dustproof net;

when the pressure difference sensor detects that the dust concentration on the inner dustproof net is higher than a first preset concentration value, the controller closes the air inlet valve and opens the centrifugal fan; when the pressure difference sensor detects that the dust concentration on the inner side dust screen is lower than a second preset concentration value, the controller opens the air inlet valve and closes the centrifugal fan.

According to the communication cabinet dust collector, when the fresh air heat dissipation condition is not satisfied (namely, fresh air heat dissipation is not needed), and when the pressure difference sensor detects that the dust concentration on the inner side dust screen is greater than a first preset concentration value (dust is cleaned according to the dust concentration) or the communication cabinet runs for a preset period (dust is cleaned according to the period), the air inlet valve and the fresh air fan are closed, the dust collection assembly is opened to run a dust collection mode, the dust collection assembly discharges the dust on the inner side dust screen to the outside of the cabinet body through the front air window, dust removal of the inner layer dust screen is automatically and intelligently controlled, long-term reliable normal work of the direct air system of the communication cabinet is guaranteed, maintenance-free, energy conservation and emission reduction of the direct air system of the communication cabinet are realized, maintenance cost of a customer on the fresh air filtering system is saved, and value is created for the customer.

In addition, the dust of the inner layer dust screen is automatically cleared by adopting a mode of triggering the vacuum dust collection of the centrifugal fan by timing (according to a preset period) or a pressure difference sensor, the blocking period is delayed, and the normal work of a fresh air system in the cabinet is kept.

On the other hand, this application embodiment still provides a communication rack, including communication equipment, air conditioner, new trend fan, air-out blast gate, rear side dust screen and foretell communication rack dust collector, the air conditioner is installed the bottom of the cabinet body, communication equipment installs communication equipment holds the intracavity and is located the top of air conditioner, the rear side of the cabinet body is provided with independently from communication equipment holds the air-out chamber in chamber, the air-out blast gate sets up the air-out intracavity, the rear side dust screen sets up the rear of air-out blast gate, new trend fan sets up air-out chamber and communication equipment hold between the chamber.

Optionally, the communication cabinet further comprises a differential pressure sensor, a controller, an in-cabinet temperature and humidity sensor and an in-cabinet temperature sensor, wherein the in-cabinet temperature and humidity sensor, the in-cabinet temperature sensor, the differential pressure sensor, the air conditioner, the fresh air fan, the air outlet valve, the dust collection assembly and the air inlet valve are respectively in signal connection with the controller;

the temperature and humidity sensor in the cabinet is arranged at the top of the cabinet body and above the fresh air fan and used for detecting the temperature and humidity of the rear area of the communication equipment;

the cabinet internal temperature sensor is arranged on the air conditioner and used for detecting the temperature at the air return inlet of the air conditioner;

when the pressure difference sensor detects that the dust concentration on the inner side dust screen is higher than a first preset concentration value, the controller closes the air inlet valve and opens the dust collection assembly; when the pressure difference sensor detects that the dust concentration on the inner side dust screen is lower than a second preset concentration value, the controller opens the air inlet valve and closes the dust collection assembly.

Optionally, the differential pressure sensor comprises a pressure switch, a first pressure switch probe and a second pressure switch probe, the first pressure switch probe and the second pressure switch probe are connected with the pressure switch, the pressure switch is in signal connection with the controller, the first pressure switch probe is arranged in the air inlet cavity, and the second pressure switch probe is arranged in the communication equipment accommodating cavity and behind the inner dustproof net;

and detecting the dust concentration on the inner side dust screen by calculating the pressure difference of the pressures detected by the first pressure switch probe and the second pressure switch probe.

Drawings

Fig. 1 is an internal configuration diagram of a communication cabinet provided by an embodiment of the present application;

fig. 2 is an air flow diagram of a communication cabinet provided by an embodiment of the present application in a heat dissipation mode;

fig. 3 is an air flow diagram of a communication cabinet provided in an embodiment of the present application when in a dust collection mode;

fig. 4 is a front perspective view of a dust collection assembly of a telecommunications cabinet according to an embodiment of the present application;

fig. 5 is a rear perspective view of a dust collection assembly of a telecommunications cabinet according to an embodiment of the present application.

The reference numerals in the specification are as follows:

100. a mail cabinet dust removal device; 200. a communication device; 300. an air conditioner; 400. a fresh air fan; 500. an air outlet valve; 600. a rear side dust screen; 700. a differential pressure sensor; 701. a pressure switch; 702. a first pressure switch probe; 703. a second pressure switch probe;

1. a cabinet body; 11. a communication device receiving cavity; 12. an air inlet cavity; 13. a front windshield; 14. an air outlet cavity; 2. A dust collection assembly; 21. a frame; 211. a through hole; 22. a centrifugal fan; 23. a dustproof baffle plate; 3. an air inlet valve; 4. an inner side dust screen; 5. an outer dust screen; 51. a layer of dust screen is arranged outside; 52. an outer two-layer dust screen; 53. the outer three layers of dust screens; 6. a separator.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present application more clearly apparent, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Referring to fig. 1 to 5, the communication cabinet provided in the embodiment of the present application includes a communication cabinet dust removing device 100, a communication apparatus 200, an air conditioner 300, a fresh air blower 400, an air outlet valve 500, and a rear side dust screen 600.

Communication cabinet dust collector 100 includes the cabinet body 1, dust absorption subassembly 2, air inlet blast gate 3 and inboard dust screen 4, the inner chamber of the cabinet body 1 includes that mutually independent communication equipment holds chamber 11 and air inlet chamber 12, inboard dust screen 4 sets up communication equipment holds between chamber 11 and the air inlet chamber 12, dust absorption subassembly 2 and air inlet blast gate 3 set up in the air inlet chamber 12, be provided with preceding wind window 13 on the preceding cabinet door of the cabinet body 1, dust absorption subassembly 2 sets up preceding wind window 13's rear is located the bottom in air inlet chamber 12, inboard dust screen 4 is relative with dust absorption subassembly 2 interval, air inlet blast gate 3 sets up preceding wind window 13's rear is located dust absorption subassembly 2's top. When the air inlet valve 3 is closed, the dust collection assembly 2 can discharge the dust on the inner dustproof net 4 to the outside of the cabinet body 1 through the front windshield 13.

The front louver 13 is preferably a louver.

Air conditioner 300 is installed the bottom of the cabinet body 1, communication equipment 200 is installed communication equipment holds the intracavity 11 and is located air conditioner 300's top, the rear side of the cabinet body 1 is provided with independently from communication equipment holds the air-out chamber 14 of chamber 11, air-out blast gate 500 sets up in the air-out chamber 14, rear side dust screen 600 sets up air-out blast gate 500's rear, new trend fan 400 sets up between air-out chamber 14 and communication equipment hold the chamber 11. The communication device 200 may be, for example, a communication master. The rear side dust screen 600 meets the IP5X dust-proof requirement.

In an embodiment, a partition plate 6 is fixedly connected to the inner side of the front cabinet door of the cabinet body 1, the air inlet cavity 12 is formed between the partition plate 6 and the front cabinet door of the cabinet body 1, the bottom of the partition plate 6 is provided with mounting holes, and the inner dust screen 4 is mounted in the mounting holes.

Hereinafter, please refer to the coordinate system of fig. 1 for the front, back, up and down directions.

In an embodiment, the communication cabinet dust removing device 100 further includes an outer dust screen 5 disposed outside the front windshield 13.

In one embodiment, the outer dust-proof net 5 includes an outer layer 51, an outer layer 52 and an outer layer 53, which are sequentially arranged from inside to outside, and the mesh sizes of the inner dust-proof net 4, the outer layer 51, the outer layer 52 and the outer layer 53 are sequentially reduced. For example, the mesh number of the inner dustproof net 4 is not less than 80 meshes, the mesh number of the outer dustproof net 51 is not less than 20 meshes, the mesh number of the outer two-layer dustproof net 52 is not less than 14 meshes, and the mesh number of the outer three-layer dustproof net 53 is not less than 10 meshes.

In one embodiment, the outer dust-proof net 51, the outer two-layer dust-proof net 52 and the outer three-layer dust-proof net 53 are in the shape of "Contraband" with the opening facing the front windshield 13, the openings of the outer dust-proof net 51, the outer two-layer dust-proof net 52 and the outer three-layer dust-proof net 53 are connected to the outside of the cabinet 1 and cover the front windshield 13, and the upper surface, the lower surface, the left side surface, the right side surface and the front side surface of the outer dust-proof net 51, the outer two-layer dust-proof net 52 and the outer three-layer dust-proof net 53 can all be used for air intake.

Thus, the advancing direction of the outer dustproof net 5 reaches 5, and the situation of blocking in the direction of a single plane can be avoided. And the air inlet area is enlarged by several times to dozens of times compared with the existing air inlet area in the single plane direction. Impurities are filtered in a layered mode, and the blocking and bonding conditions of various impurities on the same plane are reduced.

The dust, cotton wool and the like of the outer layer dust screen 51, the outer two layers dust screen 52 and the outer three layers dust screen 53 are removed by natural means (the dust, cotton wool and the like blocked on the outer layer dust screen 51, the outer two layers dust screen 52 and the outer three layers dust screen 53 are removed by natural wind blowing, rain blowing and the like). Natural wind, rain and the like are utilized for natural removal, the removed impurities do not need manual intervention, and the personnel operation is reduced.

In an embodiment, the dust collection assembly 2 includes a frame 21 and a centrifugal fan 22 mounted on the frame 21, a front side of the frame 21 is open toward the front windshield 13, a front side end face of the frame 21 is tightly attached to an inner side surface of a front cabinet door of the cabinet 1, a rear side plate of the frame 21 is open toward the inner dustproof mesh 4, a through hole 211 communicated with an inlet of the centrifugal fan 22 is formed in the rear side plate of the frame 21, and an outlet of the centrifugal fan is located in the frame; the centrifugal fan 22 may be provided in plurality side by side, for example, 3 centrifugal fans 22 are provided side by side in fig. 4.

Referring to fig. 3, when the inlet air valve 3 is closed, the centrifugal fan 22 is started, vacuum is formed in the air duct of the centrifugal fan 22 by (high-speed) rotation of the centrifugal fan 22, so that high negative pressure is formed inside and outside the air duct of the centrifugal fan 22, dust on the inner dustproof net 4 is sucked into the air duct of the centrifugal fan 22, and is discharged to the outside of the cabinet 1 through the front air window 13.

In this way, the vacuum formed by the high-speed rotation of the centrifugal fan sucks the dust on the inner layer dust screen 4 away and discharges the dust out of the cabinet through the front windshield 13 (louver). The inner layer dustproof net 4 meets the dustproof requirement of IP5X, and when the outer layer dustproof net 51, the outer two-layer dustproof net 52 and the outer three-layer dustproof net 53 are eliminated, the inner layer dustproof net 4 can still ensure the dustproof requirement of IP 5X. When the outer layer dust screen 51, the outer two-layer dust screen 52 and the outer three-layer dust screen 53 exist, the maintenance period of the inner layer dust screen 4 can be greatly reduced.

The inner dustproof net 4 is automatically and forcibly removed by utilizing the vacuum dust collection of the centrifugal fan, the dust on the inner dustproof net 4 is periodically removed, and the blocking period is delayed.

Referring to fig. 4, the dust suction assembly 2 further includes a dust-proof blocking piece 23, and the dust-proof blocking piece 23 is rotatably connected to the frame 21. When the centrifugal fan 22 is not started, the dustproof baffle 23 falls down by gravity and closes the outlet of the centrifugal fan 22; when the centrifugal fan 22 is started, the dust-proof blocking piece 23 rotates by means of wind power generated by the centrifugal fan 22 and opens the outlet of the centrifugal fan 22.

In an embodiment, the communication cabinet further includes a differential pressure sensor, a controller, an in-cabinet temperature and humidity sensor T1, and an in-cabinet temperature sensor T2, where the in-cabinet temperature and humidity sensor T1, the in-cabinet temperature sensor T2, the differential pressure sensor, the air conditioner 300, the fresh air fan 400, the air outlet valve 500, the dust collection assembly 2, and the air inlet valve 3 are respectively in signal connection with the controller.

The cabinet internal temperature and humidity sensor T1 is arranged at the top of the cabinet body 1 and above the fresh air fan 400, and is used for detecting the temperature and humidity of the rear area of the communication equipment 200; the cabinet internal temperature sensor T2 is arranged on the air conditioner 300 and used for detecting the temperature at the air conditioner return air inlet.

When the pressure difference sensor detects that the dust concentration on the inner dustproof net 4 is higher than a first preset concentration value, the controller closes the air inlet valve 3 and opens the dust collection assembly 2; when the pressure difference sensor detects that the dust concentration on the inner dustproof net 4 is lower than a second preset concentration value, the controller opens the air inlet valve 3 and closes the dust collection assembly 2. The first preset concentration value and the second preset concentration value are set as required, for example, the first preset concentration value is 60% and the first preset concentration value is 10%.

That is, when the pressure difference sensor detects that the dust concentration on the inner dustproof net 4 reaches more than 60%, the air inlet valve 3 and the fresh air fan 400 at the fresh air inlet are closed, the fresh air system is closed, and the centrifugal fan 22 is started; when the pressure difference sensor detects that the dust concentration on the dust screen is less than 10%, the centrifugal fan 22 is turned off, the fresh air system is unlocked, and the fresh air system is automatically controlled according to the control logic.

Referring to fig. 2, when the heat dissipation module is in, the centrifugal fan 22 is closed, the air inlet valve 3, the fresh air fan 400 and the air outlet valve 500 are opened, the fresh air system works, fresh air passes through the outer dust screen 5 and the front air window 13 and enters the air inlet cavity 12 from the air inlet valve 3, then enters the communication equipment accommodating cavity 11 through the inner dust screen 4, exchanges heat with the communication equipment 200, enters the rear side, and then flows out through the fresh air fan 400 and the air outlet valve 500.

In one embodiment, the differential pressure sensor 700 includes a pressure switch 701, a first pressure switch probe 702 and a second pressure switch probe 703, the first pressure switch probe 702 and the second pressure switch probe 703 are connected to the pressure switch 701, the pressure switch 701 is in signal connection with a controller, the first pressure switch probe 702 is disposed in the air inlet cavity 12, and the second pressure switch probe 703 is disposed in the communication device accommodating cavity 11 and behind the inner dust screen 4; the dust concentration on the inner dust screen 4 is detected by calculating the pressure difference between the pressures detected by the first pressure switch probe 702 and the second pressure switch probe 703 (the pressure difference between the two sides of the inner dust screen 4).

According to the communication cabinet dust collector, when the fresh air heat dissipation condition is not satisfied (namely, fresh air heat dissipation is not needed), and when the pressure difference sensor detects that the dust concentration on the inner side dust screen is greater than a first preset concentration value (dust is cleaned according to the dust concentration) or the communication cabinet runs for a preset period (dust is cleaned according to the period), the air inlet valve and the fresh air fan are closed, the dust collection assembly is opened to run a dust collection mode, the dust collection assembly discharges the dust on the inner side dust screen to the outside of the cabinet body through the front air window, dust removal of the inner layer dust screen is automatically and intelligently controlled, long-term reliable normal work of the direct air system of the communication cabinet is guaranteed, maintenance-free, energy conservation and emission reduction of the direct air system of the communication cabinet are realized, maintenance cost of a customer on the fresh air filtering system is saved, and value is created for the customer.

In addition, the dust of the inner layer dust screen is automatically cleared by adopting a mode of triggering the vacuum dust collection of the centrifugal fan by timing (according to a preset period) or a pressure difference sensor, the blocking period is delayed, and the normal work of a fresh air system in the cabinet is kept.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A communication cabinet dust removal device is characterized by comprising a cabinet body, a dust collection assembly, an air inlet valve and an inner side dust screen, wherein the inner cavity of the cabinet body comprises a communication equipment accommodating cavity and an air inlet cavity which are mutually independent, the inner side dust screen is arranged between the communication equipment accommodating cavity and the air inlet cavity, the dust collection assembly and the air inlet valve are arranged in the air inlet cavity, a front air window is arranged on a front cabinet door of the cabinet body, the dust collection assembly is arranged behind the front air window and positioned at the bottom of the air inlet cavity, the inner side dust screen and the dust collection assembly are opposite at intervals, and the air inlet valve is arranged behind the front air window and positioned above the dust collection assembly;

when the air inlet air valve is closed, the dust collection assembly can discharge dust on the inner side dust screen to the outside of the cabinet body through the front air window.

2. The communication cabinet dust removing device of claim 1, further comprising an outside dust screen disposed outside the front louver.

3. The communication cabinet dust removing device according to claim 2, wherein the outer dust screens comprise an outer layer dust screen, an outer two layer dust screen and an outer three layer dust screen which are arranged in sequence from inside to outside, and the mesh number of the inner dust screen, the outer layer dust screen, the outer two layer dust screen and the outer three layer dust screen is reduced in sequence;

outer one deck dust screen, outer two layers dust screen and outer three-layer dust screen are the opening orientation "Contraband" shape of preceding wind window, the opening of outer one deck dust screen, outer two layers dust screen and outer three-layer dust screen is connected in the outside of the cabinet body and is covered preceding wind window, upper surface, lower surface, left surface, right surface and the preceding side surface of outer one deck dust screen, outer two layers dust screen and outer three-layer dust screen all can be used to the air inlet.

4. The dust removing device of claim 3, wherein the mesh number of the inner dust screen is not less than 80 meshes, the mesh number of the outer layer dust screen is not less than 20 meshes, the mesh number of the outer two layers dust screen is not less than 14 meshes, and the mesh number of the outer three layers dust screen is not less than 10 meshes.

5. The communication cabinet dust removing device according to claim 1, wherein the dust collecting assembly comprises a frame and a centrifugal fan mounted on the frame, a front side opening of the frame faces the front windshield, a front side end face of the frame is tightly attached to an inner side surface of a front cabinet door of the cabinet body, a rear side plate of the frame faces the inner dustproof net, a through hole communicated with an inlet of the centrifugal fan is formed in the rear side plate of the frame, and an outlet of the centrifugal fan is located in the frame;

the centrifugal fan is started when the air inlet valve is closed, and vacuum is formed in the air channel of the centrifugal fan through rotation of the centrifugal fan, so that high negative pressure is formed inside and outside the air channel of the centrifugal fan, dust on the inner side dust screen is sucked into the air channel of the centrifugal fan and is discharged to the outside of the cabinet body through the front air window.

6. The communication cabinet dust collector of claim 5, wherein the dust collection assembly further comprises a dust-proof flap, the dust-proof flap being rotatably connected to the frame;

when the centrifugal fan is not started, the dustproof baffle plate falls down by means of gravity and closes the outlet of the centrifugal fan; when the centrifugal fan is started, the dustproof blocking piece rotates by means of wind power generated by the centrifugal fan and opens the outlet of the centrifugal fan.

7. The communication cabinet dust removing device of claim 5, further comprising a controller and a differential pressure sensor, wherein the differential pressure sensor and the air inlet valve are respectively in signal connection with the controller, and the differential pressure sensor is used for detecting a pressure difference between two sides of the inner dustproof net so as to detect a dust concentration on the inner dustproof net;

when the pressure difference sensor detects that the dust concentration on the inner dustproof net is higher than a first preset concentration value, the controller closes the air inlet valve and opens the centrifugal fan; when the pressure difference sensor detects that the dust concentration on the inner side dust screen is lower than a second preset concentration value, the controller opens the air inlet valve and closes the centrifugal fan.

8. The utility model provides a communication cabinet, its characterized in that includes communication equipment, air conditioner, new trend fan, air-out wind valve, rear side dust screen and claim 1-6 any one communication cabinet dust collector, the air conditioner is installed the bottom of the cabinet body, communication equipment installs communication equipment holds the intracavity and is located the top of air conditioner, the rear side of the cabinet body is provided with independently from the air-out chamber that communication equipment held the chamber, the air-out wind valve sets up in the air-out chamber, the rear side dust screen sets up the rear of air-out wind valve, the new trend fan sets up between air-out chamber and the communication equipment holds the chamber.

9. The communication cabinet of claim 8, further comprising a differential pressure sensor, a controller, an in-cabinet temperature and humidity sensor and an in-cabinet temperature sensor, wherein the in-cabinet temperature and humidity sensor, the in-cabinet temperature sensor, the differential pressure sensor, the air conditioner, the fresh air blower, the air outlet valve, the dust collection assembly and the air inlet valve are in signal connection with the controller respectively;

the temperature and humidity sensor in the cabinet is arranged at the top of the cabinet body and above the fresh air fan and used for detecting the temperature and humidity of the rear area of the communication equipment;

the cabinet internal temperature sensor is arranged on the air conditioner and used for detecting the temperature at the air return inlet of the air conditioner;

when the pressure difference sensor detects that the dust concentration on the inner side dust screen is higher than a first preset concentration value, the controller closes the air inlet valve and opens the dust collection assembly; when the pressure difference sensor detects that the dust concentration on the inner side dust screen is lower than a second preset concentration value, the controller opens the air inlet valve and closes the dust collection assembly.

10. The communication cabinet of claim 9, wherein the differential pressure sensor comprises a pressure switch, a first pressure switch probe and a second pressure switch probe, the first pressure switch probe and the second pressure switch probe are connected with the pressure switch, the pressure switch is in signal connection with a controller, the first pressure switch probe is disposed in the air intake cavity, and the second pressure switch probe is disposed in the communication equipment accommodating cavity and behind the inner dust screen;

and detecting the dust concentration on the inner side dust screen by calculating the pressure difference of the pressures detected by the first pressure switch probe and the second pressure switch probe.

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