A self-cleaning filter

Abstract

The present invention relates to a self-cleaning filter, comprising a tank body, an air inlet located at the lower end of the side wall of the tank body, an air outlet located at the upper end of the side wall of the tank body, a filter assembly and a sewage outlet arranged at the bottom end of the tank body, a fixing ring is fixedly installed on the upper end of the inner wall of the tank body, a fixing plate is fixedly installed on the lower end of the inner wall of the tank body, a mounting plate is fixedly installed on the upper end of the fixing ring, and evenly distributed positioning cylinders are fixedly installed on the upper end of the mounting plate. The outer wall of the positioning cylinder is sealed with the mounting plate, and the lower end of the positioning cylinder is equipped with a first return water pipe through a first bracket. When the self-cleaning filter proposed by the present invention needs to clean the filter bag, water is first stored in the water tank, and the valve on the third return water pipe is immediately opened to discharge water through the water distributor. The water discharged by the water distributor flows from top to bottom on the filter bag to clean the filter bag. The entire cleaning process is convenient and simple.

Description

Technical Field

[0001] The present invention relates to the technical field of air filters, in particular to a self-cleaning filter. Background Art

[0002] Air filters are air filtration devices, typically used in cleanrooms, cleanrooms, laboratories, and cleanrooms, as well as for dust control in electronic, mechanical, and communication equipment. There are five types of filters: primary, medium, high, sub-high, and high efficiency. Each model has different standards and performance.

[0003] Canister air filters are generally installed at the front end of equipment such as air compressors and Roots blowers. They generally include a canister body, an air inlet, an air outlet, and a filter cartridge arranged inside the canister body. During the use of the filter cartridge, some dust will accumulate on its outer wall. It is necessary to regularly open the canister cover at the upper end of the canister body, take out the filter cartridge and clean it. The cleaning process takes a lot of time, and frequent disassembly will reduce the sealing performance inside the equipment and affect the filtering effect of the filter. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a self-cleaning filter.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A self-cleaning filter comprises a tank body, an air inlet at the lower end of the tank body side wall, an air outlet at the upper end of the tank body side wall, a filter assembly and a sewage outlet arranged at the bottom end of the tank body, a first fixing ring is fixedly installed on the upper end of the tank body inner wall, a fixing plate is fixedly installed on the lower end of the tank body inner wall, a mounting plate is fixedly installed on the upper end of the first fixing ring, and evenly distributed positioning cylinders are fixedly installed on the upper end of the mounting plate, the outer wall of the positioning cylinder is sealed with the mounting plate, the lower end of the positioning cylinder extends to the bottom of the mounting plate, and the A first return water pipe is installed at the lower end of the positioning cylinder through a first bracket, the lowermost end of the first return water pipe is connected to the bottom of the fixed plate, the uppermost end of the first return water pipe is provided with a sealing plate, and the outer wall of the first return water pipe is provided with evenly distributed heat exchange plates, and the outer side of the heat exchange plates is provided with a filter bag. The upper end of the first return water pipe is connected to the second return water pipe, and the outlet end of the second return water pipe extends to the interior of the water storage tank. The water storage tank is located at the upper end of the filter bag, and the lower end of the water storage tank is connected to a water distributor for cleaning the filter bag.

[0007] Preferably, an auxiliary air intake pipe is also provided on the tank body, a first solenoid valve is installed on the auxiliary air intake pipe, the outlet end of the auxiliary air intake pipe extends to the bottom of the fixed plate, a heating wire is installed in the area below the fixed plate inside the tank body, a first one-way valve is installed at the lower end of the first return water pipe, and the inlet end of the first one-way valve is connected to the bottom of the fixed plate.

[0008] Preferably, a second one-way valve is installed on the fixed plate, an inlet end of the second one-way valve is connected to the upper side of the fixed plate, and a water inlet is installed at the upper end of the tank body.

[0009] Preferably, the heat exchange plate is provided with evenly distributed through holes, and a second fixing ring is provided at the edge of the heat exchange plate, and the outer wall of the second fixing ring is in contact with the inner wall of the filter bag.

[0010] Preferably, the lower end of the water storage tank is connected to a third water return pipe, the outlet end of the third water return pipe is connected to a water distributor, and a second solenoid valve is installed on the third water return pipe.

[0011] Preferably, the water distributor is annular, and an annular through groove is provided on the inner wall of the water distributor.

[0012] Preferably, a sealing ring is installed at the lower end of the first water return pipe, and a sealing surface is formed between the outer wall of the first water return pipe and the fixed plate through the sealing ring.

[0013] Preferably, a positioning plate is connected between the lower ends of the first water return pipes.

[0014] Preferably, a temperature sensor and a liquid level sensor are installed in the area below the fixing plate inside the tank body, and an air pressure sensor is installed at the air outlet.

[0015] Preferably, the lower end of the tank body is covered with an insulation layer.

[0016] The beneficial effects of the present invention are:

[0017] 1. When the self-cleaning filter proposed by the present invention needs to clean the filter bag, first fill the water tank with water, immediately open the valve on the third return pipe, and discharge the water through the water distributor. The water discharged by the water distributor flows from top to bottom on the filter bag to clean the filter bag. The whole cleaning process is convenient and simple.

[0018] 2. When storing water in the water tank, first heat the water at the bottom of the tank so that the water temperature is 50°C higher than the air temperature, and then inject air to the bottom of the fixed plate through the auxiliary air inlet pipe. After passing through the hot water, the air is heated and will take away some water vapor. When the hot air is discharged from the first return pipe, the water vapor will be cooled and liquefied. When it is finally discharged to the water tank through the second return pipe, the water storage tank is realized. During the water storage process in the water tank, the filter bag can be heated. After heating, the filter bag will expand slightly, and dust and other debris will fall off easily. In addition, the water discharged from the water distributor is not easily cooled when flowing on the filter bag, and hot water has a good cleaning effect on the filter bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of a self-cleaning filter proposed by the present invention;

[0020] Figure 2 This is a schematic diagram of the main structure of the filter bag and water storage tank of a self-cleaning filter proposed by the present invention;

[0021] Figure 3 This is a schematic cross-sectional view of the upper end of the filter bag and the water storage tank of a self-cleaning filter proposed in the present invention;

[0022] Figure 4 A self-cleaning filter according to the present invention Figure 3 A in the middle is an enlarged structural diagram;

[0023] Figure 5 This is a structural schematic diagram of the lower end of the first water return pipe of a self-cleaning filter proposed by the present invention;

[0024] Figure 6 This is a schematic top view of the water storage tank of a self-cleaning filter proposed in the present invention;

[0025] Figure 7 This is a schematic top view of the heat exchange plate of a self-cleaning filter proposed by the present invention;

[0026] Figure 8 This is a schematic diagram of the cross-sectional structure of the tank bottom of a self-cleaning filter proposed by the present invention.

[0027] In the figure: 1 tank body, 2 air inlet, 3 air outlet, 4 water injection port, 5 sewage outlet, 6 first fixing ring, 7 mounting plate, 8 positioning cylinder, 9 first return water pipe, 10 heat exchange plate, 11 filter bag, 12 fixing plate, 13 heating wire, 14 auxiliary air inlet pipe, 15 second return water pipe, 16 water storage tank, 17 third return water pipe, 18 water distributor, 19 annular groove, 20 sealing ring, 21 positioning plate, 22 first solenoid valve, 23 first one-way valve, 24 second solenoid valve, 25 second one-way valve, 101 through hole, 102 second fixing ring. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Reference Figure 1-8 A self-cleaning filter comprises a tank body 1, an air inlet 2 at the lower end of the side wall of the tank body 1, an air outlet 3 at the upper end of the side wall of the tank body 1, a filter assembly and a sewage outlet 5 arranged at the bottom end of the tank body 1, a first fixing ring 6 is fixedly installed on the upper end of the inner wall of the tank body 1, a fixing plate 12 is fixedly installed on the lower end of the inner wall of the tank body 1, a mounting plate 7 is fixedly installed on the upper end of the first fixing ring 6, and evenly distributed positioning cylinders 8 are fixedly installed on the upper end of the mounting plate 7. The outer wall of the positioning cylinder 8 is sealed with the mounting plate 7, the lower end of the positioning cylinder 8 extends to the bottom of the mounting plate 7, and the lower end of the positioning cylinder 8 is mounted through the first bracket There is a first return water pipe 9, the lower end of the first return water pipe 9 is connected to the bottom of the fixed plate 12, the upper end of the first return water pipe 9 is provided with a sealing plate, and the outer wall of the first return water pipe 9 is provided with evenly distributed heat exchange plates 10. The outer side of the heat exchange plate 10 is provided with a filter bag 11, and the upper end of the filter bag 11 is sealed with the outer wall of the positioning cylinder 8. The upper end of the first return water pipe 9 is connected to the second return water pipe 15, and the outlet end of the second return water pipe 15 extends to the inside of the water storage tank 16. The water storage tank 16 is located at the upper end of the filter bag 11, and the lower end of the water storage tank 16 is connected to a water distributor 18 for cleaning the filter bag 11.

[0030] An auxiliary air intake pipe 14 is also provided on the tank body 1, and a first solenoid valve 22 is installed on the auxiliary air intake pipe 14. After the first solenoid valve 22 is opened, air can be discharged from under the fixed plate 12. The outlet end of the auxiliary air intake pipe 14 extends to the bottom of the fixed plate 12. A heating wire 13 is installed in the area below the fixed plate 12 inside the tank body 1. A first one-way valve 23 is installed at the lower end of the first return water pipe 9, and the inlet end of the first one-way valve 23 is connected to the bottom of the fixed plate 12.

[0031] A second one-way valve 25 is installed on the fixing plate 12 , and an inlet end of the second one-way valve 25 is connected to the upper side of the fixing plate 12 . A water inlet 4 is installed at the upper end of the tank body 1 .

[0032] The heat exchange plate 10 is provided with evenly distributed through holes 101 . A second fixing ring 102 is provided at the edge of the heat exchange plate 10 . The outer wall of the second fixing ring 102 contacts the inner wall of the filter bag 11 .

[0033] The lower end of the water storage tank 16 is connected to a third water return pipe 17 , the outlet end of the third water return pipe 17 is connected to a water distributor 18 , and a second solenoid valve 24 is installed on the third water return pipe 17 .

[0034] The water distributor 18 is annular, and an annular through groove 19 is formed on the inner wall of the water distributor 18 .

[0035] A sealing ring 20 is installed at the lower end of the first water return pipe 9 , and a sealing surface is formed between the outer wall of the first water return pipe 9 and the fixing plate 12 through the sealing ring 20 .

[0036] A positioning plate 21 is connected between the lower ends of the first water return pipe 9 , and the positioning plate 21 can be used to position the lower end of the first water return pipe 9 , so that the lower end of the first water return pipe 9 can be inserted into the fixing plate.

[0037] A temperature sensor and a liquid level sensor are installed in the area inside the tank body 1 below the fixed plate 12, and an air pressure sensor is installed at the air outlet 3. The temperature sensor is used to detect the temperature of the water stored at the lower end of the tank body 1, and the liquid level sensor is used to detect the liquid level of the water stored at the lower end of the tank body 1, so that the water submerges the outlet end of the auxiliary air intake pipe 14 and avoids contact between the water and the fixed plate 12. The air pressure sensor is used to detect the pressure of the air discharged from the air outlet 3. When the pressure drops significantly, it indicates that the filter bag 11 needs to be cleaned.

[0038] The lower end of the tank body 1 is covered with a heat-insulating layer, which can keep the high-temperature water stored in the lower end of the tank body 1 warm.

[0039] The self-cleaning filter proposed in the present invention, when the filter bag 11 needs to be cleaned, first fill the water tank 16 with water, immediately open the valve on the third return pipe 17, that is, the second solenoid valve 24, and discharge the water through the water distributor 18. The water discharged by the water distributor 18 flows from top to bottom on the filter bag 11 to clean the filter bag 11. The entire cleaning process is convenient and simple.

[0040] When water is stored in the water storage tank 16, the water at the bottom of the tank body 1 is first heated so that the water temperature is more than 50°C higher than the air temperature, and then air is injected into the bottom of the fixed plate 12 through the auxiliary air inlet pipe 14. After passing through the hot water, the air is heated and will take away some water vapor. When the hot air is discharged from the first return water pipe 9, the water vapor will be cooled and liquefied. When it is finally discharged to the water storage tank 16 through the second return water pipe 15, the water storage in the water storage tank 16 is realized. During the water storage process in the water tank, the filter bag 11 can be heated. After the filter bag 11 is heated, it will expand slightly, and dust and other debris will fall off easily. The water discharged by the water distributor 18 is not easily cooled when flowing on the filter bag 11. The hot water has a good cleaning effect on the filter bag 11. In order to ensure the cleaning effect, the filter bag 11 has a higher temperature. The water temperature is generally heated to above 80°C in summer and to above 90°C in winter.

[0041] For air filters used outdoors, cold water can be filled in during the day. The sun can shine on the tank to heat the tank and heat the water. At night, the water at the bottom of the tank can be heated to clean the filter bag, effectively saving energy.

[0042] The water collection area of ​​the air filter is located at the bottom of the tank. The tank can store some water in rainy weather. This water can be used to clean the filter bag and save water resources.

[0043] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A self-cleaning filter, comprising a tank body (1), an air inlet (2) located at the lower end of the side wall of the tank body (1), an air outlet (3) located at the upper end of the side wall of the tank body (1), a filter assembly, and a sewage outlet (5) arranged at the bottom end of the tank body (1), characterized in that: A first fixing ring (6) is fixedly mounted on the upper end of the inner wall of the tank body (1), a fixing plate (12) is fixedly mounted on the lower end of the inner wall of the tank body (1), a mounting plate (7) is fixedly mounted on the upper end of the first fixing ring (6), and evenly distributed positioning cylinders (8) are fixedly mounted on the upper end of the mounting plate (7), the outer wall of the positioning cylinder (8) is sealedly connected to the mounting plate (7), the lower end of the positioning cylinder (8) extends to the bottom of the mounting plate (7), the lower end of the positioning cylinder (8) is mounted with a first return pipe (9) through a first bracket, and the lower end of the first return pipe (9) is connected to the fixing ring (6). The bottom of the plate (12) is connected, the uppermost end of the first water return pipe (9) is provided with a sealing plate, the outer wall of the first water return pipe (9) is provided with evenly distributed heat exchange fins (10), the outer side of the heat exchange fins (10) is provided with a filter bag (11), the upper end of the first water return pipe (9) is connected to the second water return pipe (15), the outlet end of the second water return pipe (15) extends to the inside of the water storage tank (16), the water storage tank (16) is located at the upper end of the filter bag (11), and the lower end of the water storage tank (16) is connected to a water distributor (18) for cleaning the filter bag (11); The tank body (1) is further provided with an auxiliary air intake pipe (14), a first solenoid valve (22) is installed on the auxiliary air intake pipe (14), the outlet end of the auxiliary air intake pipe (14) extends to the bottom of the fixed plate (12), a heating wire (13) is installed in the area below the fixed plate (12) inside the tank body (1), a first one-way valve (23) is installed at the lower end of the first return water pipe (9), and the inlet end of the first one-way valve (23) is connected to the bottom of the fixed plate (12); A second one-way valve (25) is installed on the fixed plate (12), and an inlet end of the second one-way valve (25) is connected to the upper side of the fixed plate (12). A water inlet (4) is installed at the upper end of the tank body (1).

2. A self-cleaning filter according to claim 1, characterized in that: The heat exchange plate (10) is provided with evenly distributed through holes (101), and a second fixing ring (102) is provided at the edge of the heat exchange plate (10), and the outer wall of the second fixing ring (102) is in contact with the inner wall of the filter bag (11).

3. A self-cleaning filter according to claim 2, characterized in that: The lower end of the water storage tank (16) is connected to a third water return pipe (17), the outlet end of the third water return pipe (17) is connected to a water distributor (18), and a second solenoid valve (24) is installed on the third water return pipe (17).

4. A self-cleaning filter according to claim 3, characterized in that: The water distributor (18) is annular, and an annular through groove (19) is provided on the inner wall of the water distributor (18).

5. A self-cleaning filter according to claim 1 or 4, characterized in that: A sealing ring (20) is installed at the lower end of the first water return pipe (9), and a sealing surface is formed between the outer wall of the first water return pipe (9) and the fixed plate (12) through the sealing ring (20).

6. A self-cleaning filter according to claim 5, characterized in that: A positioning plate (21) is connected between the lower ends of the first water return pipe (9).

7. A self-cleaning filter according to claim 6, characterized in that: A temperature sensor and a liquid level sensor are installed in the area below the fixed plate (12) inside the tank body (1), and an air pressure sensor is installed at the air outlet (3).

8. A self-cleaning filter according to claim 7, characterized in that: The lower end of the tank body (1) is covered with a heat-insulating layer.

Images