Filter plate assembly for hospital air purification and air purifier
By incorporating a gas distribution structure and a reflux chamber into the filter plate assembly, thorough disinfection of pathogenic microorganisms is achieved, resolving secondary contamination and occupational exposure issues associated with the filter plate assembly and ensuring the completeness and safety of the purification effect.
Patent Information
- Application Number
- CN202522374395.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-10
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-11-10
AI Technical Summary
Existing filter plate assemblies cannot achieve deep disinfection of pathogenic microorganisms in hospital environments, causing the filter plates to become microbial enrichment devices, posing risks of secondary pollution and occupational exposure.
A gas distribution structure and a return air chamber are set in the filter plate assembly. The disinfecting gas penetrates the filter media layer from the inside to the outside and is collected and discharged in the return air chamber to ensure disinfection without dead corners.
This achieves deep disinfection of the filter plates, eliminating secondary pollution and occupational exposure risks, and ensuring the thoroughness and safety of the purification effect.
Smart Images
Figure CN223668870U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to filter technical field, concretely relates to a filter plate subassembly and air purifier for hospital air purification. BACKGROUND
[0002] Air purification equipment, especially the equipment of high efficiency particulate air filter (HEPA) has been widely used in the place that has higher request to air quality, such as family, office and the hospital, operating room, biological laboratory with strict standard of cleanness degree etc. Its basic working principle is through fan drive air flow through the filter plate by multilayer filter medium, utilize the high density fiber structure of filter plate, effectively capture and intercept the suspended particulate in air, such as dust, pollen, PM2.5 etc., to output clean air.
[0003] However, in the special environment of hospital, not only the conventional dust particles are suspended in the air, but also a large number of pathogenic microorganisms with biological activity, such as various bacteria, viruses, fungal spores, etc., which pose a serious threat to human health. The existing filter plate assembly, while achieving efficient physical interception, also makes itself a concentrator of these pathogenic microorganisms. A large number of high-concentration living pathogenic microorganisms are trapped in the dense filter medium layer. Over time, the filter plate gradually evolves into a potential and high-risk source of microbial contamination. The bacteria and viruses trapped on the filter plate are not killed and can survive and even reproduce in a suitable temperature and humidity environment. When the purification equipment starts and stops, the wind speed fluctuates or the filter plate reaches saturation, these enriched pathogenic microorganisms may fall off and be blown into the room again by the airflow, forming secondary pollution with higher concentration than the initial air pollution, which poses a great health threat to indoor personnel, especially patients with low immunity. SUMMARY
[0004] To solve the above-mentioned problems of the prior art, the utility model provides a filter plate assembly for hospital air purification and an air purifier.
[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of:
[0006] A filter plate assembly for hospital air purification is provided, comprising a filter plate body composed of multiple filter medium layers, and a filter plate frame for mounting the filter plate body. A gas distribution structure for distributing disinfectant gas is arranged between the multiple filter medium layers.
[0007] The gas distribution structure is in communication with an external disinfectant gas source through a first interface arranged on the filter plate frame, so that disinfectant gas can penetrate from the inside to the outside of the gas distribution structure and pass through the filter medium layers on both sides thereof.
[0008] And, outside the multi-layer filter medium layer, a backflow gas chamber for collecting sterilization gas is arranged;
[0009] The backflow gas chamber has a porous inner wall facing the filter medium layer to allow sterilization gas penetrating the filter medium layer to enter the backflow gas chamber, and the backflow gas chamber discharges the collected sterilization gas through a second interface arranged on the filter plate frame.
[0010] Preferably, the gas distribution structure comprises:
[0011] A frame-shaped distribution pipeline surrounding the periphery of the filter medium layer;
[0012] And a plurality of release pipelines in communication with the distribution pipeline, the release pipelines are arranged in parallel and spaced apart, and penetrate between the filter medium layers to form a grid-shaped conveying network.
[0013] The pipe wall of the release pipeline is provided with a plurality of release openings for releasing sterilization gas.
[0014] Preferably, the aperture or density of the release openings of the release pipeline close to the distribution pipeline is smaller than that of the release openings away from the distribution pipeline.
[0015] Preferably, a plurality of support ribs or connecting columns for maintaining the spacing between the pipelines are arranged between the release pipelines.
[0016] Preferably, the cross-sectional shape of the release pipeline is oval or drop-shaped, and the long axis direction is parallel to the plane of the filter medium layer.
[0017] Preferably, the backflow gas chamber comprises:
[0018] A disc-shaped gas chamber body arranged at the center outside the filter medium layer;
[0019] And a discharge pipeline in communication with the gas chamber body, the discharge pipeline is in communication with the second interface.
[0020] Preferably, the end surface of the gas chamber body away from the filter medium layer is conical.
[0021] Preferably, the backflow gas chamber further comprises:
[0022] A plurality of flow guide channels in communication with the gas chamber body, the flow guide channels extend radially from the peripheral area of the filter medium layer and converge to the gas chamber body, and the gas chamber body has the porous inner wall.
[0023] The utility model also provides an air purifier, at least comprising:
[0024] The filter plate assembly for hospital air purification according to any one of the technical solutions.
[0025] The filter plate assembly for hospital air purification has the following beneficial effects:
[0026] The gas distribution structure and the backflow air chamber are arranged inside, so that the problem that the filter screen cannot be disinfected in depth and without dead angle in the prior art is solved, and the filter plate can also be disinfected before being replaced, so that the secondary pollution and the occupational exposure risk of the maintenance personnel are fundamentally eliminated. BRIEF DESCRIPTION OF DRAWINGS
[0027] Fig. 1 The filter plate assembly for hospital air purification is provided with a front view.
[0028] Fig. 2 The filter plate assembly for hospital air purification is provided with a sectional view.
[0029] Fig. 3 The filter plate assembly for hospital air purification is provided with a structural schematic view of the backflow air chamber.
[0030] BRIEF DESCRIPTION OF DRAWINGS
[0031] 1, filter medium layer; 2, filter plate frame; 3, gas distribution structure; 301, distribution pipeline; 302, release pipeline; 4, first interface; 5, backflow air chamber; 501, air chamber body; 502, discharge pipeline; 503, flow guide channel; 6, second interface. DETAILED DESCRIPTION
[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0033] Please refer to Figs. 1-3 The specific embodiments provided by the present application are as follows:
[0034] As Figs. 1 to 3 shown, the embodiments of the present application provide a filter plate assembly for hospital air purification, which comprises a filter plate body as a filtering core, and a filter plate frame 2 for supporting and installing the filter plate body. The filter plate body is composed of a plurality of stacked filter medium layers 1, which can include, for example, a primary filter layer, a high-efficiency HEPA filter layer, and an activated carbon adsorption layer, etc., to realize efficient physical interception of different types of pollutants in the air.
[0035] In the middle of the multi-layer filter medium layer 1, a gas distribution structure 3 is arranged. The gas distribution structure 3 is a hollow internal cavity or channel that can evenly distribute the gas. On the filter plate frame 2, a first interface 4 is arranged to communicate with the gas distribution structure 3. Through the first interface 4, the sterilization gas generated by the external sterilization gas source (such as an ozone generator) can be delivered to the filter plate body.
[0036] When the sterilization gas is injected into the gas distribution structure 3, due to the internal pressure, the gas will be evenly released from the structure and forced to penetrate and pass through the multi-layer filter medium layer 1 on both sides from the center layer position of the filter plate. This inward-outward sterilization method ensures that the sterilization gas can fully and dead-angle-free contact the microorganisms trapped in the deep filter material along the path opposite to the normal air purification.
[0037] In order to ensure the safety and controllability of the sterilization process and prevent high-concentration sterilization gas from leaking to the external environment, the outermost side of the multi-layer filter medium layer 1 is also coated with a backflow gas chamber 5. The backflow gas chamber 5 forms an external collection cavity. The side of the backflow gas chamber 5 facing the filter plate body is a porous inner wall. The porous inner wall can be a microporous plate, a metal mesh, or other gas-permeable structures, which allows the sterilization gas that has penetrated the filter medium layer 1 to enter the backflow gas chamber 5 evenly from the entire outer surface of the filter plate without obstruction.
[0038] Meanwhile, the second interface 6 is arranged on the filter plate frame 2 to communicate with the backflow gas chamber 5. All sterilization gas collected by the backflow gas chamber 5 that has completed the sterilization task will eventually be discharged through the second interface 6. The discharged gas can be guided to a decomposition device for harmless treatment or recycled back to the sterilization gas source for reuse.
[0039] In the normal purification mode, the external air passes through the multi-layer filter medium layer 1 in sequence and is sent out after purification. At this time, the first interface 4 and the second interface 6 are in a closed state, and the internal sterilization structure has little effect on air flow.
[0040] In the sterilization mode, the filter plate assembly is first isolated from the main air duct. Then, the sterilization gas is injected into the internal gas distribution structure 3 through the first interface 4. The gas penetrates the filter medium layer 1 on both sides from the inside to the outside, thoroughly killing the trapped microorganisms. The penetrated gas is completely captured by the outermost backflow gas chamber 5 and safely discharged through the second interface 6.
[0041] Therefore, by setting the internal gas distribution structure 3 and the backflow gas chamber 5, the problem that the filter screen cannot be disinfected deeply and without dead angle in the prior art is solved, and the filter screen can be disinfected before the filter plate is replaced, so that secondary pollution and the occupational exposure risk of maintenance personnel are fundamentally eliminated.
[0042] In a preferred embodiment, the gas distribution structure 3 comprises a frame-shaped distribution pipeline 301 and a plurality of release pipelines 302.
[0043] Specifically, the frame-shaped distribution pipeline 301 is arranged along the periphery of the filter medium layer 1 to form a closed annular main channel. The distribution pipeline 301 is in communication with an external disinfectant gas source through the first interface 4 arranged on the filter plate frame 2, and serves as a manifold for the disinfectant gas to enter and be distributed in the first stage.
[0044] The frame-shaped distribution pipeline 301 is in communication with a plurality of parallel release pipelines 302. The release pipelines 302 are uniformly and spacedly arranged and penetrate the middle position of the filter medium layer 1. The start end and the end of each release pipeline 302 are in communication with the opposite sides of the frame-shaped distribution pipeline 301, thereby jointly forming a stable and grid-shaped conveying network covering the entire filter plate plane.
[0045] In order to finally release the disinfectant gas into the filter medium layer 1, a plurality of small release openings are formed in the wall of each release pipeline 302. When the disinfectant gas enters the grid-shaped conveying network from the frame-shaped distribution pipeline 301 and fills the entire grid-shaped conveying network, the disinfectant gas is uniformly released in a controllable manner through the release openings distributed in the wall.
[0046] In a preferred embodiment, in the practice of fluid dynamics, when the disinfectant gas enters the plurality of parallel release pipelines 302 from the frame-shaped distribution pipeline 301 surrounding the periphery, the internal pressure is not constant but presents a natural tendency of gradually decreasing from the inlet end close to the distribution pipeline 301 to the distal end. If the size and distribution of all release openings are completely the same, it will inevitably result in that the amount of gas released near the inlet end (high pressure area) is too large, and the amount of gas released away from the inlet end (low pressure area) is too small, thereby affecting the uniformity of the final disinfection effect.
[0047] To solve this technical problem, the aperture or density of the release openings near the position of the distribution pipeline 301 of the release pipeline 302 is smaller than that of the release openings away from the position of the distribution pipeline 301.
[0048] Specifically, this can be achieved in two ways: the first is the aperture gradient, that is, the aperture of the release opening near the inlet is small, and the aperture gradually increases toward the distal end; the second is the density gradient, that is, the release openings near the inlet are sparsely distributed, and the number of release openings per unit length increases toward the distal end, and the distribution is more dense.
[0049] Based on this, at the high-pressure inlet end, smaller or sparser openings are used to increase the gas outlet resistance, thereby actively inhibiting excessive gas release; at the pressure-decayed far end, larger or denser openings are used to reduce the gas outlet resistance, thereby encouraging gas release. Through this non-uniform gradient opening, the actual gas release rate of each point on the entire release pipeline 302 tends to be highly consistent, ensuring the thoroughness and consistency of the disinfection process.
[0050] In a preferred embodiment, between adjacent release pipelines 302, a plurality of support ribs or connecting columns for maintaining pipeline spacing are provided.
[0051] In actual production and application, only relying on the clamping of the filter medium layer 1, multiple slender release pipelines 302 may be bent, misaligned or deformed during manufacturing, transportation or long-term use, thereby destroying their preset parallel and equidistant layout, and further affecting the uniformity of disinfection gas release.
[0052] The support ribs or connecting columns introduced in this embodiment physically connect the originally independent release pipelines 302 into a whole. This makes the entire grid-shaped delivery network change from a combination of multiple independent pipelines to an internal skeleton structure with high rigidity and integrity.
[0053] The internal skeleton structure can effectively resist external pressure and vibration, ensuring that each release pipeline 302 can maintain its preset position and straight state at any time. It ensures that the internal gas distribution uniformity of the filter plate assembly can be maintained at the initial design level throughout its entire life cycle, achieving long-term reliable disinfection effect.
[0054] In a preferred embodiment, considering that the release pipeline 302 acts as a physical structure and generates a certain air resistance to the airflow passing through when the filter plate assembly performs its main air purification function. To minimize this impact, the cross-sectional shape of the release pipeline 302 is a streamlined profile such as an oval or a teardrop shape. At the same time, its long axis direction is parallel to the plane of the filter medium layer 1. This means that during normal purification, the narrow side or tip of the pipeline faces the airflow.
[0055] Compared with traditional circular cross-section pipelines, this streamlined profile can greatly reduce the wind resistance and pressure loss generated when the purification airflow flows around. It allows air to flow more smoothly over the pipeline surface, effectively avoiding turbulence and vortex caused by pipeline obstruction, thereby ensuring that the entire filter plate assembly still maintains very high air permeability.
[0056] In a preferred embodiment, the backflow gas chamber 5 comprises a disc-shaped gas chamber body 501 arranged at a central position outside the filter medium layer 1. The gas chamber body 501 serves as the final collection point and pressure equalization chamber for all backflowing sterilization gas, and is used to receive sterilization gas permeated from the entire outer surface of the filter plate body.
[0057] Connected to the disc-shaped gas chamber body 501 is a discharge pipeline 502. The discharge pipeline 502 constitutes a concentrated discharge channel from the gas chamber body 501 to the second interface 6 on the filter plate frame 2.
[0058] In this embodiment, the end surface of the gas chamber body 501 facing away from the filter medium layer 1, i.e. the back plate of its housing, is formed as a conical structure, thereby reducing the obstruction to the air that needs to be filtered.
[0059] In this embodiment, the backflow gas chamber 5 further comprises a plurality of flow guide channels 503 directly connected to the central disc-shaped gas chamber body 501. The flow guide channels 503 extend radially outward from the gas chamber body 501 to the peripheral region of the filter medium layer 1.
[0060] The reason for this is that if there is only one central suction port (i.e. the gas chamber body 501), then the sterilization gas located at the corners and edge regions of the filter plate, which are farthest from the center, will have the longest path and the greatest resistance to be sucked, which will inevitably result in slow and uneven collection speed, forming a suction dead angle.
[0061] The radial flow guide channels 503 introduced in this embodiment construct an efficient gas collection network. The sterilization gas that has penetrated the filter medium layer 1 will immediately enter the nearest flow guide channel 503 following the principle of the shortest path. Subsequently, these gases will be quickly guided and collected to the central disc-shaped gas chamber body 501 in a low-resistance channel.
[0062] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A filter panel assembly for hospital air purification, comprising a filter panel body composed of a plurality of filter media layers, and a filter panel frame for mounting the filter panel body, characterized in that: a gas distribution structure for distributing sterilizing gas is provided between the plurality of filter media layers; the gas distribution structure is in communication with an external sterilizing gas source through a first interface provided on the filter panel frame, so that sterilizing gas can permeate from the inside to the outside of the gas distribution structure and pass through the filter media layers on both sides thereof; and a backflow plenum for collecting sterilizing gas is provided on the outside of the plurality of filter media layers; the backflow plenum has a porous inner wall facing the filter media layers to allow sterilizing gas that has penetrated the filter media layers to enter the backflow plenum, and the backflow plenum discharges the collected sterilizing gas through a second interface provided on the filter panel frame. the gas distribution structure comprises: a frame-shaped distribution pipe that surrounds the periphery of the filter media layers; and a plurality of release pipes that are in communication with the distribution pipe, are spaced apart parallel to each other, and extend through between the filter media layers to form a grid-shaped delivery network; wherein the release pipes have a plurality of release openings for releasing sterilizing gas formed on the pipe walls thereof. the release openings near the distribution pipe have a smaller aperture or density than the release openings away from the distribution pipe. a plurality of support ribs or connecting columns for maintaining the spacing between the release pipes are provided between the release pipes. the release pipes have an elliptical or drop-shaped cross-sectional shape with the long axis direction parallel to the plane of the filter media layers.
2. The filter panel assembly for hospital air purification of claim 1, wherein, the backflow plenum comprises: a disc-shaped plenum body provided centrally on the outside of the filter media layers; and a discharge pipe in communication with the plenum body, the discharge pipe being in communication with the second interface. the end surface of the plenum body facing away from the filter media layers is configured as a conical body structure. the backflow plenum further comprises: a plurality of flow guide channels in communication with the plenum body, the flow guide channels extending radially from the peripheral area of the filter media layers and converging to the plenum body, the plenum body having the porous inner wall. at least:
3. The filter panel assembly for hospital air purification of claim 2, wherein, the filter panel assembly for hospital air purification according to any one of claims 1 to 8.
4. The filter pack assembly for hospital air purification of claim 3, wherein, 5. The filter pack assembly for hospital air purification of claim 4, wherein, 6. The filter panel assembly for hospital air purification of claim 1, wherein, 7. The filter pack assembly for hospital air purification of claim 6, wherein, 8. The filter pack assembly for hospital air purification of claim 7, wherein, 9. An air cleaner characterized by comprising: