Laboratory purifying and filtering unit with plate-bag type filtering section

Abstract

The utility model provides a laboratory purification filter unit with a plate bag type filter section, which comprises an air mixing section, the plate bag type filter section, a cold water coil section, a fan section, a flow equalizing section and an air outlet end which are arranged in sequence, the plate bag type filter section comprises a mounting partition plate and a plate bag type filter device, the mounting partition plate is provided with an air inlet, and the plate bag type filter device is provided with an air outlet. The plate-bag type filtering device comprises a box body, a plate filter and a filtering bag, the front side and the rear side of the box body are open, an installation flange is arranged on the outer side face of the front end face of the box body, the box body is fixed to the installation partition plate through the installation flange, the plate filter is installed in the box body, and the filtering bag is fixed to the rear end of the box body. By using the plate bag type filtering device, the filtering effect is improved, and the cleanliness of filtered air is high. The filter unit has large treatment capacity and high purification efficiency, and meets the requirements of large laboratories. And the plate filter and the filter bag are detachably mounted, so that maintenance, disassembly, washing and replacement are facilitated, and long-term stable operation of laboratory air filtration is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of air treatment, in particular to a laboratory purification filter unit with a plate bag type filter section. Background Art

[0002] The laboratory has a high requirement for air cleanliness. Therefore, an air handling unit is often installed in the laboratory system to filter the air to prevent dust and hair in the air from affecting the accuracy of the test. However, the existing filter units have the following main problems:

[0003] 1. In order to meet the cleanliness requirements of the laboratory, the existing technology mostly uses plate-type high-efficiency filter devices for filtration. The system resistance is large and the filter unit has a small processing capacity, which is difficult to meet the needs of large laboratories;

[0004] 2. The filter device of the existing laboratory filter unit is extremely inconvenient to disassemble and install, which is not conducive to maintenance and replacement during long-term use in the laboratory. Summary of the Invention

[0005] In view of the above problems, the utility model provides a laboratory purification filter unit with a plate bag type filter section.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a laboratory purification filter unit with a plate bag filter section, comprising a mixed air section, a plate bag filter section, a cold water coil section, a fan section, a flow equalizing section and an air outlet end arranged in sequence, the mixed air section is provided with a fresh air inlet and a return air inlet, the return air inlet is connected to the air in the test room, the plate bag filter section includes a mounting partition and a plate bag filter device, the mounting partition is provided with an air inlet, the plate bag filter device includes a box body, a plate filter and a filter bag, the front and rear sides of the box body are open, the outer side surface of the front end face of the box body is provided with a mounting flange, the box body is fixed to the mounting partition through the mounting flange, the plate filter is installed in the box body, and the filter bag is fixed at the rear end of the box body.

[0007] Furthermore, a barrier frame is provided in the box body, which divides the box body into a front cavity and a rear cavity. A first groove is provided on the end face of the barrier frame facing the front end of the box body. A sealing strip is installed in the first groove, and the sealing strip is exposed outside the first groove. The inner wall of the box body of the front cavity is detachably installed with a resistance member by bolts, and the plate filter is installed between the resistance member and the barrier frame, and the sealing strip resists the plate filter.

[0008] Furthermore, the first groove is a closed groove surrounding the barrier frame, the cross section of the first groove is semicircular, and the cross section of the sealing strip is circular.

[0009] Furthermore, the rear end of the box body is divided into air outlets by a shift rod, and a first baffle is fixed to the inner side wall of the air outlet. The first baffle is a rectangular frame and is arranged close to the partition frame.

[0010] Furthermore, the filter bag includes a fixing plate and a bag body, the fixing plate is provided with a rectangular opening corresponding to the air distribution port, a support frame is fixed in the rectangular opening, the thickness of the support frame is greater than the thickness of the fixing plate, the rear end of the support frame is flush with the rear end end face of the fixing plate, the bag body includes a bag opening, the bag opening is flanged outward and is sleeved outside the support frame, the front end of the fixing plate faces the box body and is fixed to the rear end of the box body, the support frame enters the air distribution port, and the front end of the support frame contacts the first baffle frame to clamp and fix the bag opening of the bag body.

[0011] Furthermore, a limiting groove is provided on the end face of the rear end of the box body, and a first screw hole is provided on the side of the box body corresponding to the position of the limiting groove. The first screw hole is connected to the limiting groove, and a corresponding limiting block is provided on the front end face of the fixing plate. A corresponding second screw hole is provided on the limiting block, and the hole directions of the first screw hole and the second screw hole corresponding to the position are the same.

[0012] Furthermore, the resistance member includes a mounting plate and an elastic part, the mounting plate is provided with a fixing hole, the elastic part is a U-shaped spring piece, the opening of the U-shaped spring piece is set downward, the lower end of one side of the elastic part is fixed to the side of the upper surface of the mounting plate, and the other side of the elastic part is away from the mounting plate and is set toward the plate filter.

[0013] Furthermore, the plate filter includes a primary filter layer and a medium filter layer, and the bag body is a high-efficiency filter bag.

[0014] Furthermore, the size of the rectangular opening is smaller than the size of the air distribution port, and the size of the rectangular opening is larger than the size of the inner opening of the first baffle.

[0015] Furthermore, a flange hole is provided on the mounting flange.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention uses a plate-bag filter device, and the mixed air enters from the front opening of the box body, and is filtered in sequence through the plate filter and the filter bag, thereby improving the filtering effect. By combining the plate filter and the filter bag, particulate matter, dust and organic compounds can be filtered out at the same time, ensuring that the air after filtration is highly clean. The pressure that the filter bag needs to handle is lower due to the previous filtration by the plate filter, which avoids damage to the filter bag and causes filter loss, and prolongs the service life of the filter. The filter bag has a large filtering area, the filter unit has a large processing capacity, and the air purification efficiency is high, meeting the needs of large laboratories. (2) The present invention provides multiple inspection doors, and the plate filter and filter bag are detachably installed, which is convenient for inspection, disassembly, cleaning and replacement, and is conducive to the long-term stable operation of laboratory air filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a laboratory purification filter unit with a plate bag filter section according to the present invention;

[0018] Figure 2 This is a schematic structural diagram of a plate-bag filter device of a laboratory purification filter unit with a plate-bag filter section according to the present invention;

[0019] Figure 3 This is a structural schematic diagram of a box body of a laboratory purification filter unit with a plate-bag filter section according to the present invention;

[0020] Figure 4 This is a structural schematic diagram of a fixed plate of a laboratory purification filter unit with a plate-bag filter section according to the present invention;

[0021] Figure 5 This is a schematic structural diagram of a conflicting member of a laboratory purification filter unit with a plate-bag filter section according to the present invention;

[0022] Figure 6 This is a schematic diagram of the structure of the bag bodies of a laboratory purification filter unit with a plate bag type filter section according to the present invention, which is fixed in a conflicting manner. DETAILED DESCRIPTION

[0023] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the present invention is described in detail below with reference to the embodiments.

[0024] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4In one embodiment of the present invention, a laboratory purification filter unit with a plate bag filter section includes an air mixing section 100, a plate bag filter section 200, a cold water coil section 300, a fan section 400, a flow equalizing section 500 and an air outlet 600 arranged in sequence. The air outlet 600 is connected to the test room. The air mixing section 100 is provided with a fresh air inlet 110 and a return air inlet 120. The return air inlet 120 is connected to the air in the test room. Each section is also provided with an inspection door for inspection and maintenance of the unit. The plate-and-bag filter section 200 includes a mounting baffle 210 and a plate-and-bag filter device 700. The mounting baffle 210 is provided with an air inlet 211. The plate-and-bag filter device 700 comprises a housing 710, a plate filter, and a filter bag 720. The housing 710 is open at both the front and rear ends. A mounting flange 730 is provided on the outer side of the front end face of the housing 710. The housing 710 is secured to the mounting baffle 210 via the mounting flange 730. The plate filter is mounted within the housing 710, and the filter bag 720 is secured to the rear end of the housing 710. During operation, fresh air enters the unit and mixes with return air from the room in the air mixing section 100. The mixed air passes through the plate-and-bag filter device 700 to remove dust and debris. The air is then cooled by the chilled water coil section 300 to the desired temperature. Finally, the treated air is delivered to the room through the air outlet 600 via the fan section 400.

[0025] By using the plate-and-bag filter unit 700, mixed air enters through the front opening of the housing 710 and is filtered sequentially through the plate filter and filter bag 720, improving filtration efficiency. The combination of the plate filter and filter bag 720 simultaneously removes particulate matter, dust, and organic compounds, ensuring high air cleanliness after filtration. Furthermore, since the filter bag 720 is thin and easily damaged by excessive pressure, the initial filtration by the plate filter reduces the pressure required to handle the filter bag, preventing damage to the filter bag 720 and filter loss, thereby extending the filter's service life. The filter bag's larger filtration area allows the filtration unit to achieve a high throughput, meeting the needs of large laboratories.

[0026] The box body 710 is provided with a baffle frame 711, which divides the box body 710 into a front cavity and a rear cavity. The baffle frame 711 is provided with a first groove 712 on the end face facing the front end of the box body 710. A sealing strip is installed in the first groove 712, and the sealing strip is exposed outside the first groove 712. The inner wall of the box body 710 of the front cavity is detachably installed with a resistance member 740 by bolts. The plate filter is installed between the resistance member 740 and the baffle frame 711, and the sealing strip resists the plate filter. The outer side of the air outlet of the plate filter is sealed by the sealing strip, which has a good sealing effect, avoids air leakage on the side of the plate filter, improves the purification and filtering effect of the unit, and all air passing through the plate bag filter device 700 is filtered to ensure that the cleanliness of the air meets the requirements of the laboratory.

[0027] The first groove 712 is a closed groove surrounding the barrier frame. The sealing strip is adapted to the first groove 712 and is a closed sealing strip. This ensures that the sealing strip can surround the outer side of the plate filter's air outlet, ensuring sealing performance and preventing air leakage. The first groove 712 has a semicircular cross-section, while the sealing strip has a circular cross-section. The sealing strip and the first groove 712 have the same diameter. During use, when the plate filter contacts the sealing strip, the curved side of the sealing strip is easily deformed. The sealing strip can better adapt to irregular or slight surface unevenness because its soft circular cross-section can easily fill small imperfections in the contact surface, evenly contacting the sealing surface, and providing excellent sealing performance to prevent air leakage.

[0028] The rear end of the housing 710 is divided into air outlets 760 by a lever 750. A first rectangular retaining frame 761 is fixed to the inner sidewall of the air outlet 760. The first retaining frame 761 is located near the partition frame 711. By dividing the air outlet 760 into multiple air outlets 760 for installing filter bags, the simultaneous use of multiple filter bags increases the air filtration processing area, significantly improving the air handling capacity of the unit.

[0029] The filter bag 720 includes a fixing plate 721 and a bag body 722. The fixing plate 721 is provided with a rectangular opening 723 corresponding to the air outlet 760. A support frame 724 is fixed in the rectangular opening 723. The thickness of the support frame 724 is greater than that of the fixing plate 721. The rear end of the support frame 724 is flush with the rear end surface of the fixing plate 721. Figure 6The bag body 722 includes a bag opening, which is turned outward and sleeved on the outside of the support frame 724. The front end of the fixing plate 721 faces the box body 710 and is fixed to the rear end of the box body 710. The support frame 724 enters the air distribution port, and the front end of the support frame 724 abuts against the first baffle 761 to clamp and fix the bag opening of the bag body 722. The support frame 724 ensures the strength of the fixing plate 721 and prevents the rectangular opening 723 from being deformed. At the same time, the bag opening of the bag body 722 can be opened and abutted against and clamped, so that air can enter the bag body 722 from the bag opening for filtration during use. The bag body 722 is fixed in a detachable manner by abutment, and can be easily and quickly disassembled. It is convenient for replacement or cleaning of the bag body 722, which is beneficial to the maintenance of the unit and convenient for use.

[0030] A limiting groove 770 is provided on the end surface of the rear end of the box body 710, and a first screw hole 771 is provided on the side of the box body corresponding to the position of the limiting groove 770. The first screw hole 771 is connected to the limiting groove 770. A corresponding limiting block 725 is provided on the front end surface of the fixing plate 721, and a corresponding second screw hole 726 is provided on the limiting block 725. The hole directions of the first screw hole 771 and the second screw hole 726 at the corresponding positions are the same. The setting of the limiting groove 770 and the limiting block 725 facilitates the corresponding installation of the box body 710 and the fixing plate 721, which is simple and convenient to use. The corresponding first screw holes 771 and second screw holes 726 are fixedly connected by bolts to fix the fixing plate to the rear end of the box body 710, which is convenient for disassembly and maintenance. There can be four first screw holes 771, which are respectively provided in the middle of the four sides of the box body 710. The structure is simple, fewer bolts are used during installation, and it is convenient to disassemble and install.

[0031] like Figure 5 The resisting member 740 includes a mounting plate 741 and an elastic portion 742. The mounting plate 741 is provided with a fixing hole. The elastic portion 742 is a U-shaped spring clip with its opening facing downward. The lower end of one side of the elastic portion 742 is fixed to the side of the upper surface of the mounting plate 741, while the other side of the elastic portion 742 is away from the mounting plate 741 and is disposed toward the plate filter. The removable mounting method using bolts facilitates the removal and replacement of the plate filter and facilitates maintenance. The elastic portion 742 contacts the plate filter, firmly securing the plate filter. The resisting member 740 does not affect the air entering the front end of the housing 710, ensuring normal air treatment.

[0032] The plate filter includes a primary filter layer 780 and a medium-efficiency filter layer 790, and the bag body 722 is a high-efficiency filter bag. This ensures that the mixed air passes through the primary filter layer 780 to remove dust and debris, and then passes through the medium-efficiency filter layer 790 for secondary filtration to remove smaller dust and debris. Finally, it is filtered through the high-efficiency filter bag to remove air pollution, effectively purify the air, and ensure treatment results. Using high-efficiency filter bags for treatment provides high filtration efficiency, a large filtration area, and a low pressure drop, ensuring low system resistance. This makes it suitable for high-flow air treatment and meets the needs of large laboratories.

[0033] The rectangular opening 723 is smaller than the air outlet 760 and larger than the inner opening of the first retaining frame 761. This ensures that the support frame 724 fixed inside the rectangular opening 723 can enter the air outlet, and the front end of the support frame 724 contacts the first retaining frame 761, securing the bag body. This provides an aesthetically pleasing structure and ease of installation.

[0034] The mounting flange 730 is provided with a flange hole 731. To facilitate the installation and use of the box body 710, corresponding screw holes are provided on the mounting partition, and the box body 710 is detachably fixed and mounted by bolts, which is convenient for installation and disassembly and is conducive to maintenance and replacement.

[0035] The present invention has been described with reference to the above embodiments. However, these embodiments are merely exemplary embodiments of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and improvements made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A laboratory purification filter unit with a plate-bag filter section, comprising an air mixing section, a plate-bag filter section, a cold water coil section, a fan section, a flow equalizing section, and an air outlet, the air mixing section being provided with a fresh air inlet and a return air inlet, the return air inlet being connected to the air in the laboratory, characterized in that: The plate bag filter section includes an installation partition and a plate bag filter device, the installation partition is provided with an air inlet, the plate bag filter device includes a box body, a plate filter and a filter bag, the front and rear sides of the box body are open, the outer side surface of the front end face of the box body is provided with a mounting flange, the box body is fixed to the installation partition through the mounting flange, the plate filter is installed in the box body, and the filter bag is fixed at the rear end of the box body; a baffle frame is provided in the box body, the baffle frame divides the box body into a front cavity and a rear cavity, a first groove is provided on the end face of the baffle frame facing the front end of the box body, a sealing strip is installed in the first groove, the sealing strip is exposed outside the first groove, the inner side wall of the box body of the front cavity is detachably installed with a resistance member by bolts, the plate filter is installed between the resistance member and the baffle frame, and the sealing strip resists the plate filter.

2. A laboratory purification filter unit with a plate bag filter section according to claim 1, characterized in that: The first groove is a closed groove surrounding the barrier frame. The cross section of the first groove is semicircular, and the cross section of the sealing strip is circular.

3. The laboratory purification filter unit with a plate bag filter section according to claim 1, characterized in that: The rear end of the box body is divided into air outlets by a shift rod, and a first baffle is fixed to the inner side wall of the air outlet. The first baffle is a rectangular frame and is arranged close to the partition frame.

4. A laboratory purification filter unit with a plate bag filter section according to claim 3, characterized in that: The filter bag includes a fixing plate and a bag body, the fixing plate is provided with a rectangular opening corresponding to the air distribution port, a support frame is fixed in the rectangular opening, the thickness of the support frame is greater than the thickness of the fixing plate, the rear end of the support frame is flush with the rear end end surface of the fixing plate, the bag body includes a bag opening, the bag opening is turned outward and is sleeved outside the support frame, the front end of the fixing plate faces the box body and is fixed to the rear end of the box body, the support frame enters the air distribution port, and the front end of the support frame contacts the first baffle frame to clamp and fix the bag opening of the bag body.

5. A laboratory purification filter unit with a plate bag filter section according to claim 4, characterized in that: A limiting groove is provided on the end face of the rear end of the box body, and a first screw hole is provided on the side of the box body corresponding to the position of the limiting groove. The first screw hole is connected to the limiting groove, and a corresponding limiting block is provided on the front end face of the fixing plate. A corresponding second screw hole is provided on the limiting block, and the hole directions of the first screw hole and the second screw hole corresponding to the position are the same.

6. The laboratory purification filter unit with a plate bag filter section according to claim 1, characterized in that: The resistance member includes a mounting plate and an elastic portion, a fixing hole is provided on the mounting plate, the elastic portion is a U-shaped spring piece, the opening of the U-shaped spring piece is set toward the bottom, the lower end of one side of the elastic portion is fixed to the side of the upper surface of the mounting plate, and the other side of the elastic portion is away from the mounting plate and is set toward the plate filter.

7. The laboratory purification filter unit with a plate bag filter section according to claim 4, characterized in that: The plate filter comprises a primary filter layer and a medium filter layer, and the bag body is a high-efficiency filter bag.

8. The laboratory purification filter unit with a plate bag filter section according to claim 4, characterized in that: The size of the rectangular opening is smaller than the size of the air distribution port, and the size of the rectangular opening is larger than the size of the inner opening of the first baffle.

9. The laboratory purification filter unit with a plate bag filter section according to claim 1, characterized in that: The mounting flange is provided with a flange hole.

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