Filter rapid replacement device for fresh air handling unit

Abstract

The utility model relates to the technical field of fresh air handling units, and discloses a filter rapid replacement device for a fresh air handling unit, which comprises an air handling unit frame, the side surface of the air handling unit frame is rotatably connected with an access door, and the front end of the air handling unit frame is detachably provided with a pre-filter mechanism. And the pre-filtering mechanism comprises a rear frame body and a front frame body. The utility model provides a fresh air handling unit filtering rapid replacement device for construction, aiming at solving the problems that the replacement cost of a filter is increased due to high outdoor dust content in the initial operation stage of a traditional fresh air handling unit and the like. Additional low-cost and easily-obtained coarse filtering is used as a pre-filtering air treatment facility of a primary filtering device of an original air unit, so that the dust content of fresh air flowing through the primary filtering device is reduced, the dust accumulation amount is reduced, the filter replacement rate of the unit is reduced, and the construction cost is reduced; meanwhile, the device has the advantages of being foldable, convenient to install, easy to replace and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of fresh air units, in particular to a filter quick replacement device for fresh air units. Background Art

[0002] Fresh air units with certain cleanliness requirements generally have multiple filtration sections, which can be divided into coarse-effect, medium-effect, and high-efficiency filters from the fresh air inlet to the outlet. With the increase of filtration level, the price of filters also increases accordingly. Since the coarse-effect filter has the largest dust content in contact with the air, its replacement rate is generally higher. In order to make the fresh air unit compact and the filter easy to replace, the coarse-effect filter is generally assembled in a modular manner. Multiple layers of coarse-effect filter layers are wound on an aluminum frame to form an integrated filter module with high density. When replaced, the aluminum frame must be replaced as a whole. The cost of a single module is dozens of times the price of the filter material. Due to the large demand for fresh air in industrial buildings and the large size of the fresh air unit, there are dozens of coarse-effect filter modules, and it costs a lot to replace them once.

[0003] Due to the characteristics of the project, when the project has not been fully completed or some completed buildings are in operation during the construction process, the fresh air unit needs to be operated in advance to maintain the required indoor air environment. At this time, the unfinished buildings under construction will produce a large amount of highly polluted dust particles, causing the dust concentration in the entire project to be too high, which makes the coarse-effect filter module of the fresh air unit need to be replaced frequently. In severe cases, it needs to be replaced once every 5 days, which is very costly.

[0004] Based on the above-mentioned defects, the utility model provides a quick filter replacement device for a fresh air unit, which reduces the dust content passing through the coarse filter module through an external device, reduces the replacement frequency, and saves construction costs. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the utility model provides a filter quick replacement device for a fresh air unit, which has the advantages of reducing dust content and reducing replacement frequency, and solves the above-mentioned problems.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose of reducing dust content and reducing replacement frequency, the utility model provides the following technical solutions: a filter quick replacement device for a fresh air unit, comprising an air unit frame, a side of the air unit frame is rotatably connected to a maintenance door, the front end of the air unit frame is detachably installed with a pre-filter mechanism, the pre-filter mechanism comprises a rear frame and a front frame, the surface of the rear frame is provided with a groove, the surface of the front frame is fixedly installed with a convex strip, the four corners of the surface of the rear frame are fixedly installed with bolts A, the surface of the front frame is provided with a through hole, the outer side of the bolt A is threadedly connected with a nut, the middle section of the rear frame and the front frame is movably installed with a hinge shaft, the inner walls of both sides of the rear frame are provided with threaded holes, the inner sides of the threaded holes are threadedly connected with bolts B, the outer side of the bolt B is sleeved with fins, and a non-woven fabric is provided between the opposite surfaces of the rear frame and the front frame.

[0009] Preferably, the bolt A is inserted into the interior of the through hole, and the front frame is detachably connected to the rear frame via the bolt A, the through hole and the nut.

[0010] Preferably, the pre-filtering mechanism can be rotated and folded by itself via a hinge shaft.

[0011] Preferably, the fin is threadably mounted in the threaded hole by means of a bolt B.

[0012] Preferably, the groove corresponds to the convex strip, and the non-woven fabric is detachably installed between the rear frame and the interior of the front frame via the groove and the convex strip.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the utility model provides a filter quick replacement device for a fresh air unit, which has the following beneficial effects:

[0015] In view of the problem that the high outdoor dust content in the initial operation stage of traditional fresh air units leads to increased filter replacement costs, the utility model provides a fresh air unit filter quick replacement device for construction. By using an additional cheap and easily available coarse-effect filter as a pre-filtration air treatment facility of the original air unit's own primary filter device, the dust content of the fresh air flowing through the primary filter device is reduced, the dust accumulation is reduced, thereby reducing the filter replacement rate of the unit and reducing construction costs. At the same time, the device has a foldable function, which is convenient for installation and easy to replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the installation position of the pre-filtering mechanism of the utility model;

[0017] Figure 2 This is a schematic diagram of the exploded structure of the pre-filtering mechanism of the utility model;

[0018] Figure 3 This is a schematic diagram of the combined structure of the pre-filtering mechanism of the utility model;

[0019] Figure 4 This is a schematic diagram of the exploded structure of the pre-filtering mechanism of the utility model.

[0020] In the figure: 1-air unit frame, 2-inspection door, 3-pre-filter mechanism, 31-rear frame, 32-front frame, 33-groove, 34-bolt A, 35-through hole, 36-nut, 37-hinge shaft, 38-threaded hole, 39-fin, 40-bolt B, 41-non-woven fabric. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1 A filter quick replacement device for a fresh air unit comprises an air unit frame 1, an arrangement diagram of air handling sections of the fresh air unit, comprising an air intake section, an inspection section, a primary filter section, a medium filter section, a pre-cooling / heating section, a heating section, a primary surface cooling section, a humidifying section, a secondary surface cooling section, a blower section, a flow equalizing section, a reheating section, and a high-efficiency filter section. The side of the air unit frame 1 is rotatably connected with an inspection door 2, and a pre-filter mechanism 3 is detachably installed at the front end of the air unit frame 1. The pre-filter mechanism 3 can be replaced and installed using the inspection door 2.

[0023] See also Figure 2-4 The pre-filter mechanism 3 includes a rear frame 31 and a front frame 32. A groove 33 is provided on the surface of the rear frame 31. A convex strip is fixedly installed on the surface of the front frame 32. The groove 33 corresponds to the convex strip. Bolts A34 are fixedly installed at the four corners of the surface of the rear frame 31. A through hole 35 is provided on the surface of the front frame 32. The bolt A34 is inserted into the interior of the through hole 35. The outer side of the bolt A34 is threadedly connected with a nut 36. The front frame 32 is detachably connected to the rear frame 31 through the bolt A34, the through hole 35 and the nut 36.

[0024] See also Figure 2-4 A hinge shaft 37 is movably installed in the middle section of the rear frame 31 and the front frame 32, and the pre-filtering mechanism 3 can be rotated and folded by itself through the hinge shaft 37 to enter the interior of the inspection port 2.

[0025] See also Figure 2-4The inner walls of both sides of the rear frame 31 are provided with threaded holes 38, the inner threads of the threaded holes 38 are connected with bolts B40, the outer sides of the bolts B40 are provided with fins 39, and the fins 39 are threadedly installed in the inner parts of the threaded holes 38 through the bolts B40. The folded and opened rear frame 31 can be fixed.

[0026] A nonwoven fabric 41 is disposed between the opposite surfaces of the rear frame 31 and the front frame 32. The nonwoven fabric 41 is detachably installed between the rear frame 31 and the interior of the front frame 32 through the grooves 33 and the convex strips. The dusty nonwoven fabric 41 can be disassembled and replaced.

[0027] Working principle: When in use, the rear frame 31 and the front frame 32 are rotated and folded by the hinge shaft 37, which reduces the space occupied by the frame and facilitates entry from the inspection port. After entering, the rear frame 31 and the front frame 32 are folded open and can be detachably installed in front of the primary filter section.

[0028] When replacing or installing the non-woven fabric 41, first unscrew the nut 36, and then unfold the rear frame 31 from the front frame 32, so that the non-woven fabric 41 with more dust can be removed; then pierce the new non-woven fabric 41 and put it on the bolts A34 on the four corners, and then close the rear frame 31 and the front frame 32, and the convex strip squeezes the non-woven fabric 41 into the groove 33 to fix the non-woven fabric 41. The pre-filter mechanism 3 can be used to protect the more expensive primary filter during construction, reduce the number of replacement times of the primary filter, and reduce the amount of dust filtered.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filter quick-change device for a fresh air unit, comprising an air unit frame (1), a side of the air unit frame (1) being rotatably connected to an inspection door (2), characterized in that: A pre-filter mechanism (3) is detachably mounted on the front end of the air unit frame (1), and the pre-filter mechanism (3) comprises a rear frame (31) and a front frame (32), a surface of the rear frame (31) is provided with a groove (33), a surface of the front frame (32) is fixedly provided with a convex strip, four corners of the surface of the rear frame (31) are fixedly provided with bolts A (34), a surface of the front frame (32) is provided with a through hole (35), and the bolts A ( The outer side of the rear frame (34) is threadedly connected with a nut (36), the middle section of the rear frame (31) and the front frame (32) are movably mounted with a hinge shaft (37), the inner walls of both sides of the rear frame (31) are provided with threaded holes (38), the inner sides of the threaded holes (38) are threadedly connected with bolts B (40), the outer side of the bolts B (40) are sleeved with fins (39), and a non-woven fabric (41) is arranged between the opposite surfaces of the rear frame (31) and the front frame (32).

2. A filter quick-change device for a fresh air unit according to claim 1, characterized in that: The bolt A (34) is inserted into the interior of the through hole (35), and the front frame (32) is detachably connected to the rear frame (31) via the bolt A (34), the through hole (35) and the nut (36).

3. The filter quick-change device for a fresh air unit according to claim 1, characterized in that: The pre-filtering mechanism (3) can be rotated and folded by itself via a hinge shaft (37).

4. The filter quick-change device for a fresh air unit according to claim 1, characterized in that: The fin (39) is threadedly mounted inside the threaded hole (38) by means of bolts B (40).

5. The filter quick-change device for a fresh air unit according to claim 1, characterized in that: The groove (33) corresponds to the convex strip, and the non-woven fabric (41) is detachably installed between the rear frame (31) and the interior of the front frame (32) via the groove (33) and the convex strip.

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