CN204380407U - High strength hepa filter - Google Patents

Abstract

A high-strength HEPA filter, including 2 bottom frames and 2 side frames. The bottom frame and the side frames form a square frame. One side of the frame is the air outlet, and the other side is the air inlet. Both the air inlet and the air outlet are There is a protective net, and a filter element is arranged between the two protective nets. The filter element is divided into several pieces by the dividing line, and the filter element and the protective net are divided by reinforcing ribs; the utility model strengthens the strength of the filter element, and the air outlet surface is reinforced After the ribs, the problem of bending, breaking and leakage of the filter element after long-term operation of the filter is solved; the utility model is used at 1.5-2 times the rated air volume, and the filter element does not deform; adding reinforcing ribs to the large-sized air outlet surface, the production cost is only 1 increased by 3-5%; the utility model has a wide application range, compact structure, and saves storage space; the ultra-thin design saves installation space; the utility model is widely used in clean rooms and other fields that have strict requirements on air cleanliness. The temperature and humidity range is wide, the maximum operating temperature is 63°C, and the maximum humidity is 80%RH.

Description

High Strength HEPA Filter

technical field

The utility model belongs to the field of air purification equipment, in particular to a high-strength HEPA filter.

Background technique

For HEPA filters produced in European and American countries, the H size cannot exceed 3 feet (915mm), because the H size affects the strength of the filter element. If the H size exceeds 915mm, the HEPA filter element will easily sag after long-term operation, causing the filter element to bend, and the filter element may break in severe cases. , leakage, the cleanliness of the clean room is not up to standard, which affects the quality of products in the clean room.

Japan produces HEPA filters, and the conventional heights are 2 feet and 3 feet; to produce 4-foot filters, the air outlet surface needs to strengthen the mesh structure.

In order to save costs, domestic manufacturers do not make any structural reinforcement when manufacturing 4-inch filters, but in order to reduce costs, domestic manufacturers will make large-size filters.

Therefore, be badly in need of a kind of high strength HEPA filter to overcome above-mentioned shortcoming

Utility model content

The purpose of this utility model is to provide a high-strength HEPA filter to solve the problem that the filter element of the HEPA filter in the prior art is easy to sag after long-term operation, causing the filter element to bend, and the serious filter element may break and leak, and the cleanliness of the clean room is not good. Up to the standard, affecting the air quality in the clean room.

In order to achieve the above object, the utility model adopts the following technical solutions:

A high-strength HEPA filter, including 2 bottom frames and 2 side frames, the bottom frame and the side frames form a square frame, one side of the frame is an air outlet, the other side is an air inlet, the air inlet and The air outlets are all provided with face protection nets, and a filter element is arranged between the two face protection nets, and the filter cores are divided into several pieces by dividing lines, and the filter cores and the face protection nets are divided by reinforcing ribs on the air outlet surface.

Preferably, the filter element and the face protection net are evenly divided into two pieces by reinforcing ribs, and the two ends of the reinforcing ribs are snapped into two opposite side frames of the frame.

Further, gaskets are provided on both sides of the longer side frame of the side frame.

Further, a sealant is provided at the contact between the inner side wall of the side frame and the bottom frame and the filter element.

Preferably, the side frame and the bottom frame are made of anodized aluminum profiles.

Preferably, the thickness of the side frame and the bottom frame can be 50mm, 70mm, 90mm or 110mm.

Preferably, the filter element is any one of ultra-fine glass fiber, PTFE and PP.

Preferably, the dividing line adopts hot melt adhesive.

Preferably, the sealant is polyurethane.

Preferably, the surface protection net adopts a baked-painted expanded metal net.

The beneficial effects of the utility model are: the utility model strengthens the strength of the filter element of the filter, and after adding reinforcing ribs on the air outlet surface, the problems of bending, breaking and leakage of the filter element after the long-term operation of the large-size filter can be solved; the utility model can be used within 1.5- It is used at 2 times the rated air volume. In order to speed up the test, the utility model is operated at 1.5-2 times the rated air volume for a long time, and there is no problem of filter element deformation: adding reinforcing ribs to the large-sized air outlet surface will only increase the production cost The utility model has a wide application range, compact structure, and saves storage space; the ultra-thin design saves installation space; the utility model is widely used in clean rooms and other fields that have strict requirements on air cleanliness. The temperature and humidity range is wide, the maximum operating temperature is 63°C, and the maximum humidity is 80%RH.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a partial enlarged view of part A of the utility model;

Fig. 3 is a C-C sectional view of Fig. 1;

Fig. 4 is a partial enlarged view of part B of the utility model;

Fig. 5 is a perspective view of Fig. 1;

Among them: 1-separation line, 2-face protection net, 3-side frame, 4-bottom frame, 5-filter element, 6-sealing pad, 7-sealant, 8-reinforcing rib.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific embodiments.

Explanation of terms:

HEPA: refers to high-efficiency air filter.

A high-strength HEPA filter, including 2 bottom frames and 2 side frames, the bottom frame and the side frames form a square frame, one side of the frame is an air outlet, the other side is an air inlet, the air inlet and The air outlets are provided with protective nets 2, and filter elements 5 are arranged between the two protective nets 2. The filter elements 5 are divided into several pieces by the dividing line 1, and the filter elements 5 and the protective nets 2 are strengthened on the air outlet surface. Rib 8 is divided.

The filter element 5 and the face protection net 2 are evenly divided into two pieces by the reinforcing rib 8, and the two ends of the reinforcing rib 8 are snapped into two opposite side frames 3 of the frame.

Both sides of the longer frame of the side frame 3 are provided with gaskets 6 to avoid direct contact with the face protection net 2 and scratch each other; meanwhile, the airtightness inside the filter is increased.

A sealant 7 is provided on the inner side walls of the side frame 3 and the bottom frame 4 where they contact the filter element 5 .

The side frame 3 and the bottom frame 4 are made of anodized aluminum profiles.

The thickness of the side frame 3 and the bottom frame 4 can be 50mm, 70mm, 90mm or 110mm.

Described filter element 5 adopts any one in superfine glass fiber, PTFE and PP.

The dividing line 1 adopts hot melt adhesive.

The sealant 7 is made of polyurethane.

The surface protection net 2 adopts a baking varnish expanded metal net.

Processing technology of rib 8:

1) Both ends of the ribs are machined with a milling machine;

2) Snap into the frame of the air outlet side of the filter;

3) Apply glue between the reinforcement ribs, the face protection net and the filter element to fix them.

The actual wind speed of the HEPA filter is 0.35-0.45m/s, and the bending problem of the filter element will only be discovered after 3 months to half a year. Adding ribs to the air outlet surface has been tested in the laboratory for a long time, and used in several projects in small batches, which proves that the deformation problem of the filter element can be completely solved.

The utility model can also be used for a long time at 1.5-2 times the rated air volume. Domestic and foreign manufacturers produce high-volume filters in small sizes, with a size ≤ 610*610mm. Several small-sized pieces need to be spliced to meet the air supply volume in the clean room. If it is used in a large air volume environment, the filter can be made into a large size, which can reduce a lot of costs.

Test Methods:

Technical effect:

1) The filter is subjected to a long-term uninterrupted operation test at 1.5-2 times the rated wind speed (0.7m/s);

2) Observe the appearance of the filter every day, carry out the dust scanning test every two weeks, and the actual use wind speed is 0.35-0.45m/s.

test environment:

1) Cleanliness: Class 10,000;

2) Number of air changes: 80-90 per hour;

3) Temperature: 21-24°C in winter, 24-26°C in summer;

4) Humidity: 45±10%RH.

Advantage 1: Strengthen the strength of the filter element, and add reinforcement ribs to the air outlet surface, which can solve the problem of bending, breaking and leakage of the filter element after long-term operation of large-size filters.

Advantage 2: The filter can be used at 1.5-2 times the rated air volume: In order to speed up the test, the filter runs for a long time at 1.5-2 times the rated air volume, and there is no problem of filter element deformation. Dimensional filters can also be used in clean rooms with high air volume requirements.

Advantage 3: Cost control: Adding reinforcement ribs to the large-sized air outlet surface only increases the production cost by 3-5%.

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (10)

1. A high-strength HEPA filter, comprising 2 bottom frames and 2 side frames, the bottom frame and the side frames form a square frame, characterized in that: one face of the frame is an air outlet, and the other face is an air inlet , the air inlet and the air outlet are provided with protective nets (2), and a filter element (5) is arranged between the two protective nets (2), and the filter element (5) is divided into several parts by the dividing line (1). block, the filter element (5) and the face protection net (2) are divided by reinforcing ribs (8) on the air outlet surface. 2. The high-strength HEPA filter according to claim 1, characterized in that: the filter element (5) and the face protection net (2) are evenly divided into two pieces by reinforcing ribs (8), and the reinforcing ribs ( 8) snap into two opposite side frames (3) of the frame. 3. The high-strength HEPA filter according to claim 1, characterized in that: the side frame (3) is provided with sealing gaskets (6) on both sides of the longer frame. 4. The high-strength HEPA filter according to claim 1, characterized in that: a sealant (7) is provided at the contact between the inner side walls of the side frame (3) and the bottom frame (4) and the filter element (5). 5. The high-strength HEPA filter according to claim 1, characterized in that: the side frame (3) and the bottom frame (4) are made of anodized aluminum profiles. 6. The high-strength HEPA filter according to claim 1, characterized in that: the thickness of the side frame (3) and the bottom frame (4) can be 50mm, 70mm, 90mm or 110mm. 7. The high-strength HEPA filter according to claim 1, characterized in that: the filter element (5) adopts any one of ultra-fine glass fiber, PTFE and PP. 8. The high-strength HEPA filter according to claim 1, characterized in that: the dividing line (1) is made of hot melt adhesive. 9. The high-strength HEPA filter according to claim 4, characterized in that: the sealant (7) is polyurethane. 10. The high-strength HEPA filter according to claim 1, characterized in that: the surface protection net (2) is a baked-painted steel net.