A duct filter for cleanrooms

Abstract

This utility model discloses an air duct filter for cleanrooms, relating to the field of filter technology. It includes a high-efficiency filter assembly composed of a rectangular frame and a high-efficiency filter element. The high-efficiency filter element is filled and fixed inside the rectangular frame. The top of the rectangular frame has symmetrically formed storage slots and winding slots centered on the high-efficiency filter element. A shielding component is installed on the rectangular frame through the storage slots and winding slots. This shielding component is used to shield the upper surface of the high-efficiency filter element during disassembly of the high-efficiency filter assembly. By setting up the shielding component, this utility model shields the upper surface of the high-efficiency filter element through the unfolded shielding membrane during disassembly of the high-efficiency filter assembly. During the removal of the high-efficiency filter assembly, particles scattered due to vibration are contained by the shielding membrane and do not disperse into the air, thus preventing the scattered particles from affecting the air quality in the cleanroom.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, specifically a duct filter for cleanrooms. Background Technology

[0002] Air duct filters in cleanrooms are core components of air purification systems. They are responsible for removing particulate pollutants (such as dust, microorganisms, and aerosols) from the air, ensuring that the air supplied to the cleanroom reaches the required cleanliness level. Air duct filters in cleanrooms include pre-filters, medium-efficiency filters, and high-efficiency filters. Among them, high-efficiency filters are generally installed directly in the air supply static pressure box in the ceiling or in the air supply outlet of the high-efficiency air outlet. They are used to remove most of the tiny particles in the air, including bacteria, viruses, smoke, and submicron dust.

[0003] High-efficiency filters (HEPA filters) need to be replaced regularly during use. However, the side of the HEPA filter facing the direction of airflow tends to accumulate a lot of particulate matter. During disassembly and removal, some of this particulate matter may fall off due to vibration, which is detrimental to the purification requirements of cleanrooms. Therefore, this paper proposes a duct filter for cleanrooms. Utility Model Content

[0004] The purpose of this utility model is to provide an air duct filter for cleanrooms in order to solve the problems mentioned above.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a duct filter for cleanrooms, comprising a high-efficiency filter assembly consisting of a rectangular frame and a high-efficiency filter element, wherein the high-efficiency filter element is filled and fixed inside the rectangular frame, and the top of the rectangular frame is symmetrically provided with a storage groove and a winding groove centered on the high-efficiency filter element. A shielding component is installed on the rectangular frame through the storage groove and the winding groove, and the shielding component is used to shield the upper surface of the high-efficiency filter element when the high-efficiency filter assembly is disassembled;

[0006] The shielding assembly includes an unwinding spool, a shielding diaphragm, a rectangular film, a connecting strip, and a take-up spool;

[0007] The unwinding shaft and the winding shaft are rotatably connected to the inside of the storage slot and the winding slot, respectively.

[0008] One side of the shielding film is bonded and fixed to the outside of the unwinding shaft and wound around the outside of the unwinding shaft, and the other side of the shielding film is fixedly connected to the side of the rectangular film.

[0009] The rectangular film is attached to the upper surface of the rectangular frame, the connecting strip is fixed to the other side of the rectangular film, and the side of the connecting strip away from the rectangular film is bonded and fixed to the outer wall of the take-up shaft.

[0010] The connecting strip and rectangular film are wound up by rotating the winding shaft, which is used to unfold the shielding membrane. The unfolded shielding membrane can then cover the upper surface of the high-efficiency filter element.

[0011] As a further embodiment of this utility model: a rotating groove is provided at one end of the outer wall of the rectangular frame, which is aligned with the winding groove, and a transmission gear is fixed to one end of the winding shaft extending into the inner side of the rotating groove.

[0012] The bottom of the transmission gear is engaged with a knob gear, which is rotatably connected to the inner wall of the rotating groove via a pin, and the bottom end of the knob gear protrudes to the bottom of the rectangular frame.

[0013] As a further improvement of this utility model: the inner dimensions of the rectangular film match the top opening dimensions of the rectangular frame, and the length and width of the shielding film are greater than the length and width of the top opening of the rectangular frame, respectively.

[0014] As a further improvement of this utility model: a guide wheel is rotatably installed on the inner wall side of the storage groove and the winding groove near the top position, the highest point of the guide wheel is flush with the upper surface of the rectangular frame, and the rectangular film is in contact with the guide wheel.

[0015] As a further embodiment of this invention: the thickness of the rectangular film is greater than the thickness of the shielding film, and the lower surface of the shielding film is flush with the lower surface of the rectangular film.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] By setting up a shielding component, when the HEPA filter assembly is disassembled, the unfolded shielding membrane covers the upper surface of the HEPA filter element. During the removal of the HEPA filter assembly, the particles that are scattered due to vibration can be contained by the shielding membrane and will not drift into the air, thus preventing the scattered particles from affecting the air in the cleanroom. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a split diagram of the shielding component of this utility model;

[0020] Figure 3 This is another perspective view of the disassembled shielding component of this utility model.

[0021] In the diagram: 1. High-efficiency filter assembly; 101. Rectangular frame; 102. High-efficiency filter element; 103. Storage slot; 104. Rewind slot; 105. Rotating slot; 2. Shielding assembly; 201. Unwinding shaft; 202. Shielding membrane; 203. Rectangular film; 204. Connecting strip; 205. Rewinding shaft; 206. Transmission gear; 207. Knob gear; 208. Guide wheel. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-3 In this embodiment of the present invention, an air duct filter for a cleanroom includes a high-efficiency filter assembly 1 consisting of a rectangular frame 101 and a high-efficiency filter element 102. The high-efficiency filter element 102 is filled and fixed inside the rectangular frame 101. The top of the rectangular frame 101 is symmetrically provided with a storage groove 103 and a winding groove 104 centered on the high-efficiency filter element 102. A shielding assembly 2 is installed on the rectangular frame 101 through the storage groove 103 and the winding groove 104. The shielding assembly 2 is used to shield the upper surface of the high-efficiency filter element 102 when the high-efficiency filter assembly 1 is disassembled.

[0024] The shielding assembly 2 includes an unwinding spool 201, a shielding diaphragm 202, a rectangular film 203, a connecting strip 204, and a take-up spool 205;

[0025] The unwinding shaft 201 and the winding shaft 205 are rotatably connected to the inside of the storage slot 103 and the winding slot 104, respectively.

[0026] One side of the shielding film 202 is bonded and fixed to the outside of the unwinding shaft 201 and wrapped around the outside of the unwinding shaft 201, and the other side of the shielding film 202 is fixedly connected to the side of the rectangular film 203.

[0027] A rectangular film 203 is attached to the upper surface of a rectangular frame 101, and a connecting strip 204 is fixed to the other side of the rectangular film 203. The side of the connecting strip 204 away from the rectangular film 203 is bonded and fixed to the outer wall of the take-up shaft 205.

[0028] The winding shaft 205 rotates to wind up the connecting strip 204 and the rectangular film 203, which is used to unfold the shielding membrane 202. The unfolded shielding membrane 202 can shield the upper surface of the high-efficiency filter element 102.

[0029] A rotating groove 105 is provided at one end of the outer wall of the rectangular frame 101, which is aligned with the winding groove 104. A transmission gear 206 is fixed to one end of the winding shaft 205 extending into the inner side of the rotating groove 105.

[0030] The bottom of the transmission gear 206 is engaged with a knob gear 207. The knob gear 207 is rotatably connected to the inner wall end face of the rotating groove 105 via a pin, and the bottom end of the knob gear 207 protrudes to the bottom of the rectangular frame 101.

[0031] In this embodiment, it should be noted that: at the installation position of this high-efficiency filter assembly 1, a structure is provided at the bottom of the high-efficiency filter assembly 1 to push and press the high-efficiency filter assembly 1 upward, so as to make the air inlet of the rectangular film 203 fit tightly and achieve a good sealing effect. The flowing air entering from the air inlet passes through the high-efficiency filter element 102 to achieve filtration.

[0032] When it is necessary to disassemble and replace the HEPA filter assembly 1, the operating procedure is as follows:

[0033] First, release the lifting and pressing of the HEPA filter assembly 1, allowing it to move slightly downward under its own weight, thereby releasing the adhesion between the rectangular film 203 and the air inlet. Then, manually push the knob gear 207. The rotation of the knob gear 207 drives the transmission gear 206 to rotate, which in turn drives the take-up shaft 205 to rotate. The rotating take-up shaft 205 pulls the rectangular film 203 towards the take-up groove 104 through the connecting strip 204, and winds up the rectangular film 203.

[0034] At the same time, the rectangular film 203 moves and pulls the shielding film 202 to move, and the unwinding shaft 201 rotates to unwind the shielding film 202. In this way, the unfolded shielding film 202 moves to the top of the rectangular frame 101 to achieve the shielding operation on the upper surface of the high-efficiency filter element 102.

[0035] Next, the locking structure that limits the installation position of the high-efficiency filter assembly 1 is further released to facilitate the removal and dismantling of the high-efficiency filter assembly 1. During this process, due to the blocking of the diaphragm 202, the particles scattered on the surface of the high-efficiency filter element 102 due to vibration can be restricted by the diaphragm 202 and will not drift into the air, thus avoiding the scattered particles from affecting the air in the clean room.

[0036] It should be further explained that a seal is provided between the unwinding shaft 201, the winding take-up 205 and the rectangular frame 101, and there is rotational resistance. In this way, during daily use, the unwinding shaft 201 and the winding take-up 205 can be kept stable and not rotated. In addition, when the shielding membrane 202 is unfolded and the HEPA filter assembly 1 is removed, the unfolded state of the shielding membrane 202 is kept stable.

[0037] Please refer to this carefully. Figures 1-3 The inner dimensions of the rectangular film 203 match the top opening dimensions of the rectangular frame 101, and the length and width of the shielding film 202 are greater than the length and width of the top opening of the rectangular frame 101, respectively.

[0038] Guide wheels 208 are rotatably installed on the inner side of the storage slot 103 and the winding slot 104 near the top. The highest point of the guide wheel 208 is flush with the upper surface of the rectangular frame 101, and the rectangular film 203 is in contact with the guide wheel 208.

[0039] The thickness of the rectangular film 203 is greater than the thickness of the shielding film 202, and the lower surface of the shielding film 202 is flush with the lower surface of the rectangular film 203.

[0040] In this embodiment: the tight fit between the rectangular film 203 and the air inlet ensures the sealing of the installation of the high-efficiency filter assembly 1. At the same time, when the rectangular film 203 pulls the shielding membrane 202 to unfold, the shielding membrane 202 will not come into contact with or rub against the air inlet.

[0041] The guide wheel 208 can provide guidance and support for the movement of the rectangular film 203 and the blocking diaphragm 202, and can reduce the movement resistance of the rectangular film 203 and the blocking diaphragm 202.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A purification workshop air duct filter comprising a high efficiency filter assembly (1) consisting of a rectangular frame (101), a high efficiency filter core (102) filled and fixed inside the rectangular frame (101), characterized in that, The top of the rectangular frame (101) is symmetrically provided with a storage slot (103) and a winding slot (104) centered on the high-efficiency filter element (102). The rectangular frame (101) is equipped with a shielding component (2) through the storage slot (103) and the winding slot (104). The shielding component (2) is used to shield the upper surface of the high-efficiency filter element (102) when the high-efficiency filter assembly (1) is disassembled. The shielding assembly (2) includes an unwinding spool (201), a shielding diaphragm (202), a rectangular film (203), a connecting strip (204), and a take-up spool (205). The unwinding shaft (201) and the winding shaft (205) are rotatably connected to the inside of the storage groove (103) and the winding groove (104), respectively; The shielding film (202) is bonded and fixed to the outside of the unwinding shaft (201) on one side and wrapped around the outside of the unwinding shaft (201), and the other side of the shielding film (202) is fixedly connected to the side of the rectangular film (203); The rectangular film (203) is attached to the upper surface of the rectangular frame (101), the connecting strip (204) is fixed to the other side of the rectangular film (203), and the side of the connecting strip (204) away from the rectangular film (203) is bonded and fixed to the outer wall of the take-up shaft (205). The connecting strip (204) and the rectangular film (203) are wound up by rotating the winding shaft (205) to realize the unfolding of the shielding membrane (202). The unfolded shielding membrane (202) realizes the shielding operation on the upper surface of the high-efficiency filter element (102).

2. A clean room air duct filter according to claim 1, wherein A rotating groove (105) is provided at one end of the outer wall of the rectangular frame (101) and aligned with the winding groove (104). A transmission gear (206) is fixed to one end of the winding shaft (205) extending into the inner side of the rotating groove (105). The bottom of the transmission gear (206) is engaged with a knob gear (207), which is rotatably connected to the inner wall end face of the rotating groove (105) via a pin, and the bottom end of the knob gear (207) protrudes to the bottom of the rectangular frame (101).

3. A clean room air duct filter according to claim 1 wherein, The inner dimensions of the rectangular film (203) match the top opening dimensions of the rectangular frame (101), and the length and width of the shielding film (202) are greater than the length and width of the top opening of the rectangular frame (101), respectively.

4. A clean room air duct filter according to claim 1 wherein, Guide wheels (208) are rotatably installed on the inner wall side of the storage groove (103) and the winding groove (104) near the top. The highest point of the guide wheel (208) is flush with the upper surface of the rectangular frame (101), and the rectangular film (203) is in contact with the guide wheel (208).

5. A clean room air duct filter according to claim 1 wherein, The thickness of the rectangular film (203) is greater than the thickness of the shielding film (202), and the lower surface of the shielding film (202) is flush with the lower surface of the rectangular film (203).

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