Self-cleaning type fresh air system filter screen cleaning mechanism

Abstract

The invention discloses a self-cleaning type fresh air system filter screen cleaning mechanism which comprises an air inlet box body, an exhaust pipe, an upper-layer positioning pipe, an upper-layer filter screen, a lower-layer positioning pipe, a lower-layer filter screen and a self-cleaning assembly. The upper-layer filter screen and the lower-layer filter screen are alternately used, the filter screens do not need to be disassembled and manually cleaned, the washing pipe head is driven by the driving unit to move up and down, and the sealing cover and the washing pipe head are switched between the inner ends of the upper-layer positioning pipe and the lower-layer positioning pipe in a reciprocating mode; the outer end of the sealing cover is sealed and attached to the inner end of the upper-layer positioning pipe or the inner end of the lower-layer positioning pipe, and meanwhile the flushing pipe head conveys airflow to the upper-layer positioning pipe or the lower-layer positioning pipe; the device does not need to be shut down for cleaning, the outer end of the exhaust pipe still normally conveys airflow, only part of airflow in the exhaust pipe flows to the washing pipe head, the airflow is ingeniously utilized, additional kinetic energy is not needed, the self-suction and self-use airflow operation mode is achieved, and the structural design is ingenious.

Description

Technical Field

[0001] The present invention belongs to the field of air cleaning devices, and particularly relates to a self-cleaning filter cleaning mechanism for a fresh air system. Background Art

[0002] In order to achieve energy conservation and emission reduction, many outdoor communication cabinets now use fresh air systems to replace or partially replace air conditioning systems. When using a fresh air system, air filtration is a key and difficult point. Generally, a primary filter and a medium filter are used to filter dust in the air. However, outdoor cabinets are generally installed beside urban streets, and there is a lot of dust in the air, so the filter clogs quickly. After the filter clogs, the ventilation volume drops sharply, and the ventilation and cooling effect drops severely or even fails, affecting the normal operation of the equipment in the cabinet. It is necessary to clean or replace the filter regularly by hand, which is laborious and costly. Therefore, it is necessary to change the existing structure, upgrade and transform it, and provide an intelligent, efficient and convenient way to clean the filter screen. Summary of the Invention

[0003] Aiming at the deficiencies of the above-mentioned prior art, the problem solved by the present invention is: without manual disassembly, a self-cleaning filter cleaning mechanism for a fresh air system that can clean the filter screen intelligently, efficiently and conveniently can be provided.

[0004] To solve the above problems, the technical solutions adopted by the present invention are as follows: A self-cleaning filter cleaning mechanism for a fresh air system, comprising an air inlet box body, an exhaust pipe, an upper positioning pipe, an upper filter screen, a lower positioning pipe, a lower filter screen, and a self-cleaning component; the exhaust pipe is installed at the upper end of the air inlet box body; the upper positioning pipe and the lower positioning pipe are respectively inserted and installed vertically on one side of the air inlet box body; the upper filter screen and the lower filter screen are respectively installed inside the upper positioning pipe and the lower positioning pipe; the self-cleaning component is installed on the air inlet box body; the self-cleaning component includes a closed cover, a flushing nozzle, a one-way valve, a telescopic pipe, a shunt pipe, and a driving unit; the closed cover is installed inside the air inlet box body, and the outer end of the closed cover is hermetically attached to the inner end of the upper positioning pipe or the inner end of the lower positioning pipe; the flushing nozzle is installed in the middle of the closed cover; the shunt pipe is inserted through the air inlet box body, the outer end of the shunt pipe extends and is connected to the outer end of the exhaust pipe, and the inner end of the shunt pipe is located above the inside of the air inlet box body; the telescopic pipe is connected between the upper side of the outer end of the flushing nozzle and the lower side of the inner end of the shunt pipe; the one-way valve is installed on the flushing nozzle; the driving unit is installed on the air inlet box body, and the driving unit drives the flushing nozzle to move up and down, and makes the closed cover and the flushing nozzle reciprocate between the inner ends of the upper positioning pipe and the lower positioning pipe, so that the outer end of the closed cover is hermetically attached to the inner end of the upper positioning pipe or the inner end of the lower positioning pipe, and at the same time the flushing nozzle conveys air flow to the upper positioning pipe or the lower positioning pipe.

[0005] Furthermore, it further includes a controller; the controller is installed on the outer side of the air inlet box body; the controller is controllably connected to the driving unit.

[0006] Furthermore, the driving unit is a driving motor; a lifting groove is provided on the side of the air inlet box body; a lifting block is provided on the outer side of the flushing pipe head; the lifting block is installed on the lifting groove in a floating up-and-down manner; an internal lead screw is installed in the lifting groove, the internal lead screw is threadedly connected to the lifting block, the lower end of the internal lead screw is connected to the driving unit, and the driving unit controls the forward and reverse rotation of the internal lead screw.

[0007] Furthermore, through holes are respectively formed in the upper and lower parts on one side of the air inlet box body, and the upper positioning pipe and the lower positioning pipe are fixedly connected through the through holes.

[0008] Furthermore, a switching valve is installed on the flow dividing pipe; the controller is controllably connected to the switching valve.

[0009] Furthermore, the telescopic pipe is made of a folded bellows.

[0010] Furthermore, both the upper filter screen and the lower filter screen are made of metal materials.

[0011] Furthermore, an air flow suction fan is provided on the air extraction pipe.

[0012] The beneficial effects of the present invention are as follows: 1. The present invention alternately uses an upper filter screen and a lower filter screen, without the need for disassembly and manual cleaning of the filter screen. The driving unit drives the flushing nozzle to move up and down, and enables the closing cover and the flushing nozzle to reciprocally switch between the inner ends of the upper positioning pipe and the lower positioning pipe, so that the outer end of the closing cover is hermetically attached to the inner end of the upper positioning pipe or the inner end of the lower positioning pipe. At the same time, the flushing nozzle conveys air flow to the upper positioning pipe or the lower positioning pipe. For this reason, when it is necessary to clean the lower filter screen, the driving unit drives the flushing nozzle to move downward, and the closing cover closes the inner end of the lower positioning pipe. At this time, the upper filter screen allows air flow to enter, and at the same time, the opening and closing valve on the shunt pipe is opened, so that part of the air flow inside the suction pipe flows to the flushing nozzle. Since a check valve is provided on the flushing nozzle, the air flow will not be inhaled from the lower filter screen. In this way, the air flow is conveyed to the lower filter screen inside the lower positioning pipe through the flushing nozzle for reverse blowing, so that the dust and impurities attached to the outside of the lower filter screen are discharged. After cleaning, the opening and closing valve on the shunt pipe is closed, and at this time, the input air flow continues to be filtered by the upper filter screen. When it is necessary to clean the upper filter screen, the driving unit drives the flushing nozzle to move upward, and the closing cover closes the inner end of the upper positioning pipe. At this time, the lower filter screen allows air flow to enter, and at the same time, the opening and closing valve on the shunt pipe is opened, so that part of the air flow inside the suction pipe flows to the flushing nozzle. Since a check valve is provided on the flushing nozzle, the air flow will not be inhaled from the upper filter screen. In this way, the air flow is conveyed to the upper filter screen inside the upper positioning pipe through the flushing nozzle for reverse blowing, so that the dust and impurities attached to the outside of the upper filter screen are discharged. After cleaning, the opening and closing valve on the shunt pipe is closed, and at this time, the input air flow continues to be filtered by the lower filter screen. By repeating this process, intelligent, convenient and efficient control is achieved.

[0013] 2. The present invention does not require shutdown for cleaning. The outer end of the suction pipe still conveys air flow normally. Only part of the air flow inside the suction pipe flows to the flushing nozzle, making clever use of the air flow without additional kinetic energy, realizing a self-suction and self-use air flow operation mode, and the structural design is ingenious. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the present invention in which the lower filter screen filters air intake and the upper filter screen cleans exhaust air.

[0015] Figure 2 It is a schematic structural diagram of the present invention in which the upper filter screen filters air intake and the lower filter screen cleans exhaust air.

[0016] Figure 3 For the present invention Figure 1 The enlarged structural diagram of the lower part.

[0017] Figure 4 For the present invention Figure 2 The enlarged structural diagram of the upper part. DETAILED DESCRIPTION OF THE INVENTION

[0018] The following further elaborates on the content of the present invention in conjunction with the accompanying drawings.

[0019] As Figures 1 to 4 shown, a self - cleaning filter cleaning mechanism for a fresh air system includes an air inlet box body 1, an exhaust pipe 2, an upper positioning pipe 3, an upper filter screen 4, a lower positioning pipe 5, a lower filter screen 6, and a self - cleaning component 7. The exhaust pipe 2 is installed at the upper end of the air inlet box body 1. The upper positioning pipe 3 and the lower positioning pipe 5 are respectively installed through and connected to one side of the air inlet box body 1 up and down. The upper filter screen 4 and the lower filter screen 6 are respectively installed inside the upper positioning pipe 3 and the lower positioning pipe 5. The self - cleaning component 7 is installed on the air inlet box body 1. The self - cleaning component 7 includes a closed cover 71, a flushing nozzle 72, a one - way valve 73, a telescopic pipe 74, a shunt pipe 75, and a driving unit 76. The closed cover 71 is installed inside the air inlet box body 1, and the outer end of the closed cover 71 is hermetically attached to the inner end of the upper positioning pipe 3 or the inner end of the lower positioning pipe 5. The flushing nozzle 72 is installed in the middle of the closed cover 71. The shunt pipe 75 is connected through the air inlet box body 1, the outer end of the shunt pipe 75 extends and is connected to the outer end of the exhaust pipe 2, and the inner end of the shunt pipe 75 is located above the inside of the air inlet box body 1. A telescopic pipe 74 is connected between the upper side of the outer end of the flushing nozzle 72 and the lower side of the inner end of the shunt pipe 75. A one - way valve 73 is installed on the flushing nozzle 72. The driving unit 76 is installed on the air inlet box body 1, and the driving unit 76 drives the flushing nozzle 72 to move up and down, and makes the closed cover 71 and the flushing nozzle 72 reciprocally switch between the inner ends of the upper positioning pipe 3 and the lower positioning pipe 5, so that the outer end of the closed cover 71 is hermetically attached to the inner end of the upper positioning pipe 3 or the inner end of the lower positioning pipe 5, and at the same time, the flushing nozzle 72 conveys air flow to the upper positioning pipe 3 or the lower positioning pipe 5.

[0020] As Figures 1 to 4 shown, for the convenience of intelligent control, further, it also includes a controller 8. The controller 8 is installed on the outer side of the air inlet box body 1. The controller 8 is controllably connected to the driving unit 76.

[0021] As Figures 1 to 4 shown, in order for the driving unit 76 to control the up - and - down movement of the flushing nozzle 72, further, the driving unit 76 is a driving motor. A lifting groove 11 is provided on the side of the air inlet box body 1. A lifting block 721 is provided on the outer side of the flushing nozzle 72. The lifting block 721 is installed on the lifting groove 11 in a floating up - and - down manner. An internal lead screw 9 is installed in the lifting groove 11. The internal lead screw 9 is threadedly connected to the lifting block 721, and the lower end of the internal lead screw 9 is connected to the driving unit 76. The driving unit 76 controls the forward and reverse rotation of the internal lead screw 9.

[0022] As Figures 1 to 4As shown in the figure, in order to facilitate the positioning of the upper positioning pipe 3 and the lower positioning pipe 5, further, through-holes are respectively formed in the upper and lower parts on one side of the air inlet box body 1, and the upper positioning pipe 3 and the lower positioning pipe 5 are fixedly connected through the through-holes. In order to close the air flow diversion after cleaning, further, an opening and closing valve 751 is installed on the diversion pipe 75; the controller 8 is connected to control the opening and closing valve 751. Further, the telescopic pipe 74 is made of a foldable corrugated pipe. Further, both the upper filter screen 4 and the lower filter screen 6 are made of metal materials. Further, an air flow suction fan 21 is provided on the air extraction pipe 2.

[0023] In the present invention, the upper filter screen 4 and the lower filter screen 6 are alternately used, without the need for disassembly and manual cleaning of the filter screen. The flushing pipe head 72 is driven by the driving unit 76 to move up and down, and the closed cover 71 and the flushing pipe head 72 reciprocally switch between the inner ends of the upper positioning pipe 3 and the lower positioning pipe 5, so that the outer end of the closed cover 71 is hermetically attached to the inner end of the upper positioning pipe 3 or the inner end of the lower positioning pipe 5, and at the same time the flushing pipe head 72 conveys air flow to the upper positioning pipe 3 or the lower positioning pipe 5; for this reason, when it is necessary to clean the lower filter screen 6, the driving unit 76 drives the flushing pipe head 72 to move downward, and the closed cover 71 closes the inner end of the lower positioning pipe 5. At this time, the upper filter screen 4 allows air flow to enter, and at the same time the opening and closing valve on the diversion pipe 75 is opened, so that part of the air flow inside the air extraction pipe 2 flows to the flushing pipe head 72. Since a one-way valve 73 is provided on the flushing pipe head 72, the air flow will not be sucked from the lower filter screen 6. In this way, the air flow is conveyed to the lower filter screen 6 inside the lower positioning pipe 5 through the flushing pipe head 72 for reverse blowing, so that the dust and impurities attached to the outer side of the lower filter screen 6 are discharged. After cleaning, the opening and closing valve on the diversion pipe 75 is closed, and at this time the input air flow is continuously filtered through the upper filter screen 4; when it is necessary to clean the upper filter screen 4, the driving unit 76 drives the flushing pipe head 72 to move upward, and the closed cover 71 closes the inner end of the upper positioning pipe 3. At this time, the lower filter screen 6 allows air flow to enter, and at the same time the opening and closing valve on the diversion pipe 75 is opened, so that part of the air flow inside the air extraction pipe 2 flows to the flushing pipe head 72. Since a one-way valve 73 is provided on the flushing pipe head 72, the air flow will not be sucked from the upper filter screen 4. In this way, the air flow is conveyed to the upper filter screen 4 inside the upper positioning pipe 3 through the flushing pipe head 72 for reverse blowing, so that the dust and impurities attached to the outer side of the upper filter screen 4 are discharged. After cleaning, the opening and closing valve on the diversion pipe 75 is closed, and at this time the input air flow is continuously filtered through the lower filter screen 6. In this way, reciprocatingly, intelligent, convenient and efficient control is achieved.

[0024] The present invention does not require shutdown for cleaning, and the outer end of the air extraction pipe 2 still conveys air flow normally. Only part of the air flow inside the air extraction pipe 2 flows to the flushing pipe head 72, making clever use of the air flow without additional kinetic energy, realizing a self-sucking and self-using air flow operation mode, with a clever structural design.

[0025] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A self-cleaning filter cleaning mechanism for a fresh air system, characterized in that It includes an air inlet box body, an exhaust pipe, an upper positioning pipe, an upper filter screen, a lower positioning pipe, a lower filter screen, and a self-cleaning component; the exhaust pipe is installed at the upper end of the air inlet box body; the upper positioning pipe and the lower positioning pipe are respectively installed through and connected up and down on one side of the air inlet box body; the upper filter screen and the lower filter screen are respectively installed inside the upper positioning pipe and the lower positioning pipe; the self-cleaning component is installed on the air inlet box body; the self-cleaning component includes a closed cover, a flushing pipe head, a one-way valve, a telescopic pipe, a shunt pipe, and a driving unit; the closed cover is installed inside the air inlet box body, and the outer end of the closed cover is hermetically fitted to the inner end of the upper positioning pipe or the inner end of the lower positioning pipe; the flushing pipe head is installed in the middle of the closed cover; the shunt pipe is connected through the air inlet box body, the outer end of the shunt pipe extends and is connected to the outer end of the exhaust pipe, and the inner end of the shunt pipe is located above the inside of the air inlet box body; a telescopic pipe is connected between the upper side of the outer end of the flushing pipe head and the lower side of the inner end of the shunt pipe; a one-way valve is installed on the flushing pipe head; the driving unit is installed on the air inlet box body, and the driving unit drives the flushing pipe head to move up and down, and makes the closed cover and the flushing pipe head reciprocate and switch between the inner ends of the upper positioning pipe and the lower positioning pipe, so that the outer end of the closed cover is hermetically fitted to the inner end of the upper positioning pipe or the inner end of the lower positioning pipe, and at the same time the flushing pipe head conveys air flow to the upper positioning pipe or the lower positioning pipe.

2. The self-cleaning fresh air system filter cleaning mechanism according to claim 1, wherein It further includes a controller; the controller is installed outside the air inlet box body; the controller is controlled and connected to the driving unit.

3. The self-cleaning fresh air system filter cleaning mechanism according to claim 1, characterized in that, The driving unit is a driving motor; a lifting groove is provided on the side of the air inlet box body; a lifting block is provided on the outer side of the flushing pipe head; the lifting block is installed on the lifting groove in a floating manner up and down; an internal lead screw is installed in the lifting groove, the internal lead screw is threadedly connected to the lifting block, the lower end of the internal lead screw is connected to the driving unit, and the driving unit controls the forward and reverse rotation of the internal lead screw.

4. The self-cleaning fresh air system filter cleaning mechanism according to claim 1, characterized in that Piercing grooves are respectively opened up and down on one side of the air inlet box body, and the upper positioning pipe and the lower positioning pipe are fixedly connected through the piercing grooves.

5. The self-cleaning fresh air system filter cleaning mechanism according to claim 2, characterized in that, An opening and closing valve is installed on the shunt pipe; the controller is controlled and connected to the opening and closing valve.

6. The self-cleaning fresh air system filter cleaning mechanism according to claim 1, characterized in that The telescopic pipe is made of a foldable corrugated pipe.

7. The self-cleaning fresh air system filter cleaning mechanism according to claim 1, characterized in that, Both the upper filter screen and the lower filter screen are made of metal materials.

8. The self-cleaning fresh air system filter cleaning mechanism according to claim 1, characterized in that, An air flow suction fan is provided on the exhaust pipe.

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