阅读说明：本技术 一种自动除尘的箱变及其除尘方法 (Automatic dust removal box transformer substation and dust removal method thereof ) 是由 王红军 罗杰 于 2021-01-05 设计创作，主要内容包括：本发明公开一种自动除尘的箱变及其除尘方法,自动除尘的箱变包括箱体、进风装置、温控装置、出风装置、传感器组和控制装置,温控装置通过进风装置与箱体连通,出风装置与箱体连通；温控装置包括壳体和设置在壳体内的进风管、进风风机、制冷器、导热片和发热丝；导热片一端伸入到进风管内,导热片另一端与制冷器的冷端连接。本发明的技术方案中,在进行除尘时,先通过传感器组获得箱体内的温度,从而通过控制装置控制发热丝工作或者控制制冷器工作,将通过进风装置进入到箱体内的空气加热或者制冷,在温度较低的情况下,发热丝工作对空气加热,热风将箱体内的灰尘干燥并扬起进入到空气中,通过出风装置将灰尘排出。(The invention discloses an automatic dust removal box transformer substation and a dust removal method thereof, wherein the automatic dust removal box transformer substation comprises a box body, an air inlet device, a temperature control device, an air outlet device, a sensor group and a control device, wherein the temperature control device is communicated with the box body through the air inlet device, and the air outlet device is communicated with the box body; the temperature control device comprises a shell, and an air inlet pipe, an air inlet fan, a refrigerator, a heat conducting fin and a heating wire which are arranged in the shell; one end of the heat-conducting fin extends into the air inlet pipe, and the other end of the heat-conducting fin is connected with the cold end of the refrigerator. According to the technical scheme, when dust is removed, the temperature in the box body is obtained through the sensor group, so that the heating wire or the refrigerator is controlled to work through the control device, air entering the box body through the air inlet device is heated or refrigerated, the heating wire works to heat the air under the condition of low temperature, the dust in the box body is dried and lifted by hot air and enters the air, and the dust is discharged through the air outlet device.)

1. An automatic dust removal box transformer substation is characterized by comprising a box body, an air inlet device, a temperature control device, an air outlet device, a sensor group and a control device, wherein the temperature control device is communicated with the box body through the air inlet device and is used for controlling the temperature of air entering the box body through the air inlet device, and the air outlet device is communicated with the box body and is used for discharging the air in the box body; the temperature control device comprises a shell, and an air inlet pipe, an air inlet fan, a refrigerator, a heat conducting sheet and a heating wire which are arranged in the shell; the air inlet fan and the heating wire are arranged in the air inlet pipe, one end of the heat conducting strip extends into the air inlet pipe, and the other end of the heat conducting strip is connected with the cold end of the refrigerator; the sensor group and the control device are arranged in the box body, the sensor group is connected with the control device and used for detecting the temperature and the dust concentration in the box body, and the control device is used for controlling the opening and closing of the refrigerator and the heating wire according to the temperature in the box body.

2. The automatic dust removal box-type substation of claim 1, wherein the sensor group comprises a dust detector, a humidity sensor and a temperature sensor, the dust detector is used for detecting dust concentration, the humidity sensor is used for detecting humidity, the temperature sensor is used for detecting temperature, and the dust detector, the humidity sensor and the temperature sensor are all connected with the control device.

3. The automatic box-type transformer substation that removes dust of claim 2, characterized in that air-out device includes air-out pipe, locating lever, air-out fan and baffle, air-out pipe one end with the roof of box be perpendicular to be connected and with the inside intercommunication of box, the air-out pipe other end is connected with a plurality of locating lever, the locating lever is perpendicular with the roof, seted up a plurality of and locating lever one-to-one on the baffle, each locating lever cooperation activity wear to locate in the locating hole that corresponds, so that the vertical movable sleeve of baffle is in on the locating lever.

4. The automatic dust removal box transformer substation of claim 3, wherein the diameter of the baffle is larger than that of the air outlet pipe, so that the baffle covers the air outlet pipe.

5. The automatic dust removal box-type substation of claim 2, wherein the air inlet device comprises a connecting pipe and a plurality of air inlet connectors, the plurality of air inlet connectors are respectively arranged at eight corners of the box body, the air inlet connectors are used for communicating the connecting pipe with the interior of the box body, and the connecting pipe is communicated with the air inlet pipe.

6. The automatic dust removal box transformer substation of claim 5, wherein a copper bar is arranged in the box body, the air intake device further comprises a connecting hose, one end of the connecting hose is connected with the connecting pipe, and the other end of the connecting hose extends into the box body and is opened towards the position of the copper bar.

7. The automatic dust removal box transformer substation of claim 2, wherein the temperature control device further comprises a dust prevention assembly, the dust prevention assembly comprises a sleeve, a filter screen and a metal net, the metal net and the filter screen are both arranged in the sleeve, the metal net is arranged on the side, facing the ground, of the filter screen, an external thread is arranged on the outer side of the sleeve, and an internal thread matched with the external thread is arranged on the inner side of one end, facing the ground, of the air inlet pipe.

8. The automatic dust removal box transformer substation of any one of claims 1-7, wherein a camera is further arranged in the box body, the camera is connected with the control device, and the camera is used for workers to observe the conditions in the box body.

9. The dust removal method of the box transformer substation with automatic dust removal is characterized by being applied to the box transformer substation with automatic dust removal as set forth in any one of claims 1-8, and comprises the following steps:

starting the air inlet fan and the air outlet fan;

acquiring the actual temperature in the box body, and judging whether the actual temperature is less than a first preset temperature or not; if not, the control device closes the heating wire and starts the refrigerator to refrigerate the air, and after a first preset time, the control device returns to the step of obtaining the actual temperature in the box body and judging whether the actual temperature is smaller than a first preset temperature or not.

If so, the control device closes the refrigerator and starts the heating wire to heat the air;

after a fifth preset time, re-acquiring the actual temperature in the box body, and judging whether the actual temperature is greater than a second preset temperature, wherein the second preset temperature is greater than the first preset temperature;

and if so, executing the step of acquiring the actual temperature in the box body and judging whether the actual temperature is less than a first preset temperature.

And if so, executing the step that the control device closes the heating wire and starts the refrigerator so as to refrigerate the air.

10. The method for automatically removing dust from a box-type substation according to claim 9, wherein the step of turning off the refrigerator and activating the heater to heat the air by the control device is followed by the steps of:

acquiring the dust concentration in the box body, and judging whether the dust concentration is greater than a preset concentration or not;

if yes, returning to the step of obtaining the actual temperature in the box body after a second preset time, and judging whether the actual temperature is smaller than the first preset temperature;

if not, the air outlet fan and the temperature control device are closed, and the air inlet fan is closed after a third preset time;

and after the fourth preset time, returning to the step of starting the air inlet fan and the air outlet fan to restart.

Technical Field

The invention belongs to the technical field of box transformer substation equipment capable of automatically removing dust, and particularly relates to a box transformer substation capable of automatically removing dust and a dust removing method of the box transformer substation capable of automatically removing dust.

Background

The transformer is used as an indispensable energy source in our daily life, is convenient and quick to use, generally exists in the aspects of our life, and also puts higher requirements on the construction of our electric power infrastructure, and plays an important role as an indispensable device in the electric power transmission process. The dust adsorbs on copper bar or box inner wall to steam in the adsorbed air causes equipment creepage and short circuit easily, and the condition that work efficiency reduces then can appear in the transformer under the influence of dust, leads to the destroyed condition of equipment in the box even, and present common transformer does not have dust collecting equipment or dust removal effect low.

Disclosure of Invention

The invention mainly aims to provide an automatic dust removal box transformer and a dust removal method thereof, and aims to solve the problems that the existing common transformer has no dust removal equipment or has low dust removal effect.

In order to achieve the purpose, the box transformer substation capable of automatically removing dust provided by the invention comprises a box body, an air inlet device, a temperature control device, an air outlet device, a sensor group and a control device, wherein the temperature control device is communicated with the box body through the air inlet device, the temperature control device is used for controlling the temperature of air entering the box body through the air inlet device, and the air outlet device is communicated with the box body to be used for discharging the air in the box body; the temperature control device comprises a shell, and an air inlet pipe, an air inlet fan, a refrigerator, a heat conducting sheet and a heating wire which are arranged in the shell; the air inlet fan and the heating wire are arranged in the air inlet pipe, one end of the heat conducting strip extends into the air inlet pipe, and the other end of the heat conducting strip is connected with the cold end of the refrigerator; the sensor group and the control device are arranged in the box body, the sensor group is connected with the control device and used for detecting the temperature and the dust concentration in the box body, and the control device is used for controlling the opening and closing of the refrigerator and the heating wire according to the temperature in the box body.

Preferably, the sensor group includes dust detector, humidity transducer and temperature sensor, the dust detector is used for detecting dust concentration, humidity transducer is used for detecting humidity, temperature sensor is used for detecting the temperature, the dust detector humidity transducer with temperature sensor all with controlling means connects.

Preferably, the air outlet device comprises an air outlet pipe, a positioning rod, an air outlet fan and a baffle, one end of the air outlet pipe is vertically connected with a top plate of the box body and is communicated with the inside of the box body, the other end of the air outlet pipe is connected with a plurality of positioning rods, the positioning rods are perpendicular to the top plate, a plurality of positioning holes in one-to-one correspondence with the positioning rods are formed in the baffle, and the positioning rods are matched and movably arranged in the corresponding positioning holes, so that the baffle is vertically movably sleeved on the positioning rods.

Preferably, the diameter of the baffle is larger than that of the air outlet pipe, so that the baffle covers the air outlet pipe.

Preferably, the air inlet device comprises a connecting pipe and a plurality of air inlet joints, the air inlet joints are arranged at eight corners of the box body respectively, the air inlet joints are used for communicating the connecting pipe and the interior of the box body, and the connecting pipe is communicated with the air inlet pipe.

Preferably, the copper bar is arranged in the box body, the air inlet device further comprises a connecting hose, one end of the connecting hose is connected with the connecting pipe, and the other end of the connecting hose extends into the box body and is provided with an opening facing the position of the copper bar.

Preferably, temperature control device still includes dustproof subassembly, dustproof subassembly includes sleeve pipe, filter screen and metal mesh, the metal mesh with the filter screen all sets up in the sleeve pipe, the metal mesh sets up towards ground one side of filter screen, the sleeve pipe outside is provided with the external screw thread, the one end inboard of orientation ground of air-supply line be provided with external screw thread complex internal thread.

Preferably, still be provided with the camera in the box, the camera with controlling means connects, the camera is used for the staff to observe the condition in the box.

The invention also provides a dust removal method of the box transformer substation with automatic dust removal, which is applied to any one of the box transformer substations with automatic dust removal, and comprises the following steps:

starting the air inlet fan and the air outlet fan;

acquiring the actual temperature in the box body, and judging whether the actual temperature is less than a first preset temperature or not; if not, the control device closes the heating wire and starts the refrigerator to refrigerate the air, and after a first preset time, the control device returns to the step of obtaining the actual temperature in the box body and judging whether the actual temperature is smaller than a first preset temperature or not.

If so, the control device closes the refrigerator and starts the heating wire to heat the air;

after a fifth preset time, re-acquiring the actual temperature in the box body, and judging whether the actual temperature is greater than a second preset temperature, wherein the second preset temperature is greater than the first preset temperature;

and if so, executing the step of acquiring the actual temperature in the box body and judging whether the actual temperature is less than a first preset temperature.

And if so, executing the step that the control device closes the heating wire and starts the refrigerator so as to refrigerate the air.

Preferably, in the method for removing dust from an automatic dust removal box transformer substation, after the step of turning off the refrigerator and starting the heating wire by the control device to heat air, the method includes the following steps:

acquiring the dust concentration in the box body, and judging whether the dust concentration is greater than a preset concentration or not;

if yes, returning to the step of obtaining the actual temperature in the box body after a second preset time, and judging whether the actual temperature is smaller than the first preset temperature;

if not, the air outlet fan and the temperature control device are closed, and the air inlet fan is closed after a third preset time;

and after the fourth preset time, returning to the step of starting the air inlet fan and the air outlet fan to restart.

According to the technical scheme, when dust is removed, the temperature in the box body is obtained through the sensor group, when the temperature is higher than a second preset temperature, the heating wire is closed, the refrigerator is started to refrigerate air, so that the temperature in the box body is reduced, the equipment in the box body is prevented from being damaged due to high temperature, when the temperature in the box body is lower than the first preset temperature, the first preset temperature is smaller than or equal to the second preset temperature, the refrigerator is closed, the heating wire is started to heat the air, the dust adsorbed to the copper bar or the inner wall of the box body due to water absorption in the box body is dried by hot air and is lifted into the air in the box body, then the air and the dust in the box body are discharged through the air outlet device, the dust is quickly dried through heated air flow, the dust is enabled to enter the air and be discharged, and the dust removing efficiency is.

Drawings

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

Fig. 1 is a schematic structural diagram of an automatic dust removal box-type substation according to the present invention.

Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

Fig. 3 is a schematic flow chart of a dust removal method of an automatic dust removal box-type substation according to the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)	Reference numerals	Name (R)
						1	Box body	2	Air intake device	3	Temperature control device
4	Air outlet device	5	Sensor group	6	Control device
						7	Shell body	8	Air inlet pipe	9	Air intake fan
10	Refrigerating device	11	Heat conducting fin	12	Heating wire
						13	Air outlet pipe	14	Positioning rod	15	Air outlet fan
16	Baffle plate	17	Air inlet joint	18	Connecting pipe
						19	Sleeve pipe	20	Filter screen	21	Metal net
22	Dustproof assembly

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

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

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 to 3, the invention provides an automatic dust removal box transformer substation, which includes a box body 1, an air inlet device 2, a temperature control device 3, an air outlet device 4, a sensor group 5 and a control device 6, wherein the temperature control device 3 is communicated with the box body 1 through the air inlet device 2, the temperature control device 3 is used for controlling the temperature of air entering the box body 1, and the air outlet device 4 is communicated with the box body 1 to exhaust the air in the box body 1; the temperature control device 3 comprises a shell 7, and an air inlet pipe 8, an air inlet fan 9, a refrigerator 10, a heat conducting fin 11 and a heating wire 12 which are arranged in the shell 7; the air inlet fan 9 and the heating wire 12 are both arranged in the air inlet pipe 8, one end of the heat conducting strip 11 extends into the air inlet pipe 8, and the other end of the heat conducting strip 11 is connected with the cold end of the refrigerator 10; the sensor group 5 and the control device 6 are arranged in the box body 1, the sensor group 5 is connected with the control device 6, the sensor group 5 is used for detecting the temperature and the dust concentration in the box body 1, and the control device 6 is used for controlling the opening and closing of the refrigerator 10 and the heating wire 12 according to the temperature in the box body 1.

In the technical scheme of the invention, when dust is removed, the temperature in the box body 1 is obtained through the sensor group 5, when the temperature is higher than the second preset temperature, the heating wire 12 is closed and the refrigerator 10 is started to refrigerate the air, so as to reduce the temperature in the box body 1 and prevent the equipment in the box body 1 from being damaged due to high temperature, the first preset temperature is less than or equal to the second preset temperature, when the temperature in the box body 1 is lower than a first preset temperature, the refrigerator 10 is closed and the heating wire 12 is opened to heat the air, the hot air dries and raises the dust adsorbed to the copper bar or the inner wall of the box body 1 in the box body 1 due to water absorption into the air in the box body 1, and then the air and the dust in the box body 1 are discharged through the air outlet device 4, the dust is quickly dried by the heated airflow, so that the dust can be quickly introduced into the air and removed, and the dust removal efficiency is increased.

More specifically, an inlet air temperature sensor is disposed at an inlet end of the air inlet pipe 8, and the inlet air temperature sensor is connected to the control device 6, so as to control the power of the heating wire 12 and the refrigerator 10 according to the temperature of the air entering the air inlet pipe 8 and the temperature inside the box body 1.

Referring to fig. 1 and 3, in another embodiment of the present invention, the sensor group 5 includes a dust detector, a humidity sensor and a temperature sensor, the dust detector is used for detecting dust concentration, the humidity sensor is used for detecting humidity, the temperature sensor is used for detecting temperature, and the dust detector, the humidity sensor and the temperature sensor are all connected to the control device 6.

Specifically, the dust concentration in the air is detected through a dust detector, so that the quantity of dust in the box body 1 is sensed to determine whether the dust in the box body 1 is too much, and whether dust removal is continued or not is controlled, more specifically, the heating wire 12 is arranged below the heat conducting strip 11, and when the humidity in the box body 1 is too high, the heating wire 12 and the heat conducting strip 11 are simultaneously opened to achieve the effect of dehumidifying the entering air, so that the humidity in the box body 1 is reduced.

Referring to fig. 1 and 3, in another embodiment of the present invention, the air outlet device 4 includes an air outlet pipe 13, positioning rods 14, an air outlet fan 15 and a baffle 16, one end of the air outlet pipe 13 is vertically connected to a top plate of the box body 1 and is communicated with the inside of the box body 1, the other end of the air outlet pipe 13 is connected to the positioning rods 14, the positioning rods 14 are vertical to the top plate, the baffle 16 is provided with a plurality of positioning holes corresponding to the positioning rods 14 one by one, and each positioning rod 14 is movably fitted through the corresponding positioning hole, so that the baffle 16 is vertically movably sleeved on the positioning rod 14.

Specifically, the baffle 16 is movably sleeved with the positioning rods 14 by being provided with a plurality of positioning holes which are matched with the positioning rods 14 one by one, the baffle 16 overcomes the gravity to move upwards under the action of wind power after the air outlet fan 15 is opened, so that air in the box body 1 is discharged from a gap between the air inlet pipe 8 and the baffle 16, and when the air outlet fan 15 does not work, the baffle 16 covers the air outlet pipe 13.

Referring to fig. 1 and 3, in another embodiment of the present invention, the diameter of the baffle 16 is larger than the diameter of the air outlet pipe 13, so that the baffle 16 covers the air outlet pipe 13.

Specifically, baffle 16's diameter is greater than the diameter of play tuber pipe 13, when air-out fan 15 was out of work, baffle 16 lid was established play tuber pipe 13 is last, can prevent that debris and rainwater from entering into in the box 1 through going out tuber pipe 13, more specifically, go out tuber pipe 13 with be provided with the sealing ring on the side that baffle 16 contacted.

Referring to fig. 1 and 3, in another embodiment of the present invention, the air intake device 2 includes a connecting pipe 18 and a plurality of air intake joints 17, the plurality of air intake joints 17 are respectively disposed at eight corners of the box body 1, the air intake joints 17 are used for communicating the connecting pipe 18 with the inside of the box body 1, and the connecting pipe 18 is communicated with the air intake pipe 8.

Specifically, through being connected in a plurality of air inlet joint 17 and the box 1, realize removing dust to a plurality of positions heating in the box 1.

Referring to fig. 1 and 3, in another embodiment of the present invention, a copper bar is disposed in the box body 1, the air intake device 2 further includes a connection hose, one end of the connection hose is connected to the connection pipe 18, and the other end of the connection hose extends into the box body 1 and has an opening facing the position of the copper bar.

Specifically, the copper bar is direct to expose in the air, and the dust falls on the copper bar easily, consequently through extra coupling hose direct with the air guide copper bar that gets into in order to strengthen getting rid of to the dust on the copper bar.

Referring to fig. 1 to 3, in another embodiment of the present invention, the temperature control device 3 further includes a dust-proof assembly 22, the dust-proof assembly 22 includes a sleeve 19, a filter screen 20 and a metal mesh 21, the metal mesh 21 and the filter screen 20 are both disposed in the sleeve 19, the metal mesh 21 is disposed on a side of the filter screen 20 facing the ground, an external thread is disposed on an outer side of the sleeve 19, and an internal thread matched with the external thread is disposed on an inner side of one end of the air inlet pipe 8 facing the ground.

Specifically, the external screw thread that is provided with outside the sleeve pipe 19 of dustproof subassembly 22 and be provided with the internal thread on the air-supply line 8, realize dustproof subassembly 22 and the swing joint of air-supply line 8 through external screw thread and internal thread fit, be convenient for change, metal mesh 21 sets up in filter screen 20 towards ground one side, sets up in the outside promptly, prevents through metal mesh 21 that filter screen 20 from being destroyed.

Referring to fig. 1 and 3, the present invention further provides a dust removing method for an automatic dust removing box-type substation, which is applied to any one of the above automatic dust removing box-type substations, and the dust removing method for the automatic dust removing box-type substation includes the following steps:

s100, starting the air inlet fan and the air outlet fan 15;

s200, acquiring the actual temperature in the box body 1, and judging whether the actual temperature is lower than a first preset temperature or not;

if not, step S500 is executed, the control device 6 turns off the heating wire 12 and starts the refrigerator 10 to cool the air, and after a first preset time, the process returns to step S100.

If yes, executing step S300, wherein the control device 6 turns off the refrigerator 10 and turns on the heating wire 12 to heat the air;

s400, after a fifth preset time, re-acquiring the actual temperature in the box body, and judging whether the actual temperature is greater than a second preset temperature, wherein the second preset temperature is greater than the first preset temperature;

if yes, go to step S500.

Specifically, as the dust can adsorb the water vapor in the air to form a mixture when being adsorbed on the inner wall of the copper bar or the box body 1, the dust cannot be lifted by directly using airflow impact, and the dust removal efficiency is low, the invention evaporates the moisture adsorbed by the dust, and after the dust is dried, the dust is easily lifted by the airflow and is discharged out of the box body 1 through the air outlet pipe 13, so that the dust removal efficiency is increased; the air flow needs to be heated in order to accelerate the evaporation of the moisture, and the heated air flow enters the box body 1, so that the temperature in the box body 1 is easily increased, and the equipment is easily damaged at high temperature, therefore, when the temperature is too high, the air flow is cooled, the temperature in the box body 1 is reduced, and the equipment damage caused by the too high temperature is prevented.

Referring to fig. 1 and 3, in another embodiment of the dust removing method for an automatic dust removing box transformer substation according to the present invention, after the step S300, the method further includes the following steps:

s310, acquiring the dust concentration in the box body 1, and judging whether the dust concentration is greater than a preset concentration or not;

if yes, S320, after a second preset time, returning to the step of obtaining the actual temperature in the box body 1 and judging whether the actual temperature is lower than the first preset temperature;

if not, S330, closing the air outlet fan 15 and the temperature control device 3, and closing the air inlet fan after a third preset time;

and S340, after a fourth preset time, returning to the step of starting the air inlet fan and the air outlet fan 15 to restart.

Specifically, after the air inlet machine and the heating wire 12 are both opened, dust is lifted into the air, when the dust detector detects the dust, the dust continues to be removed, when the dust is not detected, the air inlet fan, the heating wire 12 and the air outlet fan are closed to save energy, and when the air inlet fan is closed, the air outlet fan 15 is closed first and then the air inlet fan is closed to ensure that the air pressure in the box body 1 is higher than the external air pressure, so as to discharge the dust in the gap of the box body 1, more specifically, the third preset time is calculated and obtained according to the volume in the box body 1 and the power of the air inlet fan, the fourth preset time is calculated and obtained according to the dust concentration of the external environment and the requirement of the cleanliness of the equipment in the box body 1, the second preset time is calculated and obtained according to the difference value between the time temperature and the first preset temperature, the first preset temperature is calculated and obtained according to the lowest upper temperature limit of the plurality of devices in the box body 1.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.