VOCs filter

Abstract

The utility model belongs to the field of VOCs filters, and discloses a VOCs filter which is provided with an air inlet, an air outlet, a condensation cavity and a filter cavity, the condensation cavity and the filter cavity are communicated, the condensation cavity is opened to the outside through the air inlet, a condensation sheet is arranged in the condensation cavity, the filter cavity is opened to the outside through the air outlet, an air filter element is arranged in the filter cavity, and the condensation sheet dehumidifies environmental gas. Thereby forming a pretreatment gas; the filter element of the filter is used for removing the VOCs contained in the pretreated gas, so that moisture in the sucked environment gas can be removed, and then the VOCs are removed through the filter element, so that the targeted filtering implementation of the filter element on the VOCs is enhanced, and the filtering efficiency of the VOCs is further enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of VOCs filters, and specifically relates to a VOCs filter. Background Technology

[0002] VOCs (volatile organic compounds) refer to organic liquids and solids with a vapor pressure greater than 0.0007 atm (0.01 psia) and a boiling point below 260°C at room temperature. VOC emissions are considered the second largest category of air pollutants after particulate matter. Some toxic VOCs pose various health hazards, such as irritation, corrosiveness, organ toxicity, and carcinogenicity, significantly impacting human health. With modern humans spending over 80% of their time indoors, public awareness of indoor environmental pollution is increasing. Major sources of indoor VOCs include building materials, decoration materials, furniture, household appliances, cleaning agents, cigarette smoke, cooking fumes, and human activity.

[0003] The main harmful components of indoor VOCs include: formaldehyde, benzene and its homologues such as toluene and xylene, and cigarette smoke {nicotine, benzo(a)pyrene, NNK (4-methylnitrosamine-1-(3-pyridine)-1-butanone), dimethylnitrosamine, etc.}.

[0004] Formaldehyde possesses strong adhesive and preservative properties. It is widely used in adhesives and coatings for decorative materials and furniture. Formaldehyde is a slowly volatile substance; formaldehyde in engineered wood products used in interior decoration, furnishings, and various furniture pieces has a significant release period of over three years. Formaldehyde emissions from decoration materials and furniture have become a significant factor in indoor air pollution. The Chinese government stipulates that the concentration limit for formaldehyde in indoor air is 0.08 mg / m³.

[0005] Benzene and its homologues are widely used as chemical raw materials, solvents, and diluents. Paints, coatings, and adhesives used in home decoration all contain benzene and its homologues. The Chinese government stipulates that the concentration limit for benzene in indoor air is 2.4 mg / m³, and the concentration limit for xylene is 0.3 mg / m³.

[0006] Existing household VOCs filters on the market remove VOCs by using targeted filter cartridges. However, due to the high humidity in the environment of southern my country, water molecules compete with VOCs during the adsorption process of the filter cartridges. This means that the filter cartridges also adsorb water molecules, making it difficult for the targeted filter cartridges to effectively filter VOCs, resulting in poor VOCs filtration efficiency. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a VOCs filter that can remove moisture from inhaled ambient air and then remove VOCs through the filter element, thereby enhancing the filter element's targeted filtration of VOCs and thus improving the VOCs filtration efficiency.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A VOCs filter, having an inlet and an outlet, is used to filter particulate matter and VOCs from ambient gases. It is characterized by having: a condensing chamber and a filtering chamber connected together; the condensing chamber is open to the outside through the inlet and contains condensing plates; the filtering chamber is open to the outside through the outlet and contains a filter element; wherein the condensing plates dehumidify the ambient gas, thereby forming pretreated gas; and the filter element removes VOCs contained in the pretreated gas.

[0010] Preferably, the present invention further includes a condensation component, comprising a semiconductor cooling chip, heat dissipation fins, and a condenser plate, wherein the condenser plate faces the air inlet and is attached to the cold end of the semiconductor cooling chip, and the heat dissipation fins are attached to the hot end of the semiconductor cooling chip.

[0011] Furthermore, an air intake is equipped with a diversion fan, which is used to introduce ambient gas into the condensation chamber.

[0012] Preferably, the present invention also has a water collection cavity with a water collection port communicating with the condensation cavity. The condensation plate has an edge drainage section, and the water collection port is located below the edge drainage section. The condensate generated by the condensation plate flows down from the edge drainage section and into the water collection cavity from the water collection port.

[0013] Furthermore, at least one condensate channel is formed on the surface of the condenser plate. The condensate channel is inclined in the vertical direction, and the condensate flows out through the lowest point of the edge of the condenser plate, forming an edge drainage section.

[0014] Furthermore, the inner wall of the condensation chamber located near the water inlet has a confluence zone facing the water inlet, and the confluence zone is in the shape of a funnel that monotonically contracts towards the water inlet, so that the water inlet is located at the lowest point of the confluence zone.

[0015] Furthermore, a water collection container is detachably installed inside the water collection cavity. The water collection container is used to collect condensate from the water collection port, and a liquid level sensor is installed at a predetermined height on the inner wall of the water collection container.

[0016] Preferably, the filter chamber is provided with an internal partition, which divides the filter chamber into a filter element sub-chamber and a monitoring sub-chamber. The filter element is detachably installed inside the filter element sub-chamber, and the monitoring sub-chamber is connected to the filter element sub-chamber through a controllable valve. A VOCs concentration sensor is installed inside the monitoring sub-chamber.

[0017] Preferably, the air filter element has a large particle filtration layer and multiple VOCs filtration layers.

[0018] Preferably, the present invention also has a control cavity, in which an air pump is provided. The input of the air pump is connected to the condensation cavity, and the output is connected to the filter cavity. The filter cavity is also provided with a container tube connected to the condensation cavity through the air pump. The container tube has at least one air passage, and the at least one air passage is connected to at least one air filter element.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. Because the VOCs filter of this utility model has a connected condensation chamber and a filter chamber, the condensation chamber is open to the outside through the air inlet and is equipped with condensing plates, and the filter chamber is open to the outside through the air outlet and is equipped with a filter element. The condensing plates dehumidify the ambient gas, thereby forming pretreated gas; the filter element removes the VOCs contained in the pretreated gas. Therefore, this utility model can remove moisture from the inhaled ambient gas and then remove VOCs through the filter element, thereby enhancing the targeted filtration of VOCs by the filter element and thus enhancing the filtration efficiency of VOCs.

[0021] 2. Because this utility model also includes a condensation component, including a semiconductor cooling chip, heat dissipation fins and a condenser plate, with the condenser plate facing the air inlet and attached to the cold end of the semiconductor cooling chip, and the heat dissipation fins attached to the hot end of the semiconductor cooling chip, this utility model has the characteristic of low noise and is more suitable for household needs.

[0022] 3. Because the surface of the condenser plate of this utility model forms at least one condensate flow channel, the condensate flow channel is inclined in the vertical direction, and the condensate flow channel flows out through the lowest point of the edge of the condenser plate, forming an edge drainage part, the inclined setting of the condensate channel of this utility model makes it easier to drain the water to the water collection port in a timely manner.

[0023] 4. Because the filter chamber of this utility model is equipped with an internal partition, which divides the filter chamber into a filter element sub-chamber and a monitoring sub-chamber, the filter element is detachably installed inside the filter element sub-chamber. The monitoring sub-chamber is connected to the filter element sub-chamber through a controllable valve, and a VOCs concentration sensor is installed inside the monitoring sub-chamber. Therefore, this utility model can effectively obtain the VOCs concentration of the output gas filtered by the current filter element through the VOCs concentration sensor, so as to know in time whether the current filter element is effectively filtering, and based on this, decide in time whether to replace the filter element. When the VOCs concentration of the gas in the monitoring sub-chamber is less than the predetermined standard, the controllable valve can isolate the filter element sub-chamber and the monitoring sub-chamber, so that the VOCs concentration of the gas at the outlet will not increase with the increase of the VOCs concentration in the filter element sub-chamber.

[0024] 5. Because the gas filter element of this utility model has a large particle filtration layer and multiple VOCs filtration layers, that is, before filtering VOCs, large particles in the gas are removed to prevent large particles from negatively affecting the filtration efficiency of the VOCs filtration layer. Therefore, the gas filter element of this utility model can filter VOCs more efficiently. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a VOCs filter according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the condenser assembly according to an embodiment of the present invention.

[0027] In the diagram: 100, VOCs filter; 100a, air inlet; 100b, air outlet; 100c, condensation chamber; 100d, filtration chamber; 100e, water collection chamber; 100f, control chamber; 100g, manifold; 10, exhaust fan; 20, condensation assembly; 21, condenser fins; 21a, condensate water channel; 21b, transition arch; 22, semiconductor cooling chip; 22A, fixing frame; 23, heat dissipation fins; 30, water collection container; 40, internal partition; 40a, filter element sub-chamber; 40b, monitoring sub-chamber; 41, container tube; 41a, air passage; 42, filter element; 42A, filter element support; 43, controllable valve; 44, VOCs concentration sensor; 50, vacuum pump; 60, controller. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following embodiments, in conjunction with the accompanying drawings, will specifically illustrate the VOCs filter of this utility model. It should be noted that the description of these embodiments is for the purpose of helping to understand this utility model, but does not constitute a limitation on this utility model.

[0029] like Figure 1 As shown, the VOCs filter 100 in this embodiment has an air inlet 100a, an air outlet 100b, a condensation chamber 100c, a filtration chamber 100d, a water collection chamber 100e, and a control chamber 100f. Specifically, the VOCs filter 100 has a filter housing (not shown in the figure). The air inlet 100a and the air outlet 100b are formed on the surface of the filter housing. The air inlet 100a introduces ambient air, and the air outlet 100b discharges filtered VOCs-compliant air. The condensation chamber 100c, the filtration chamber 100d, the water collection chamber 100e, and the control chamber 100f are four internal cavities formed inside the filter housing, and the air inlet 100a is formed on the top of the condensation chamber 100c.

[0030] The condensing chamber 100c is open to the outside through the air inlet 100a, and the filter chamber 100d is open to the outside through the air outlet 100b. The condensing chamber 100c is connected to the water collection chamber 100e, and the condensing chamber 100c is connected to the filter chamber 100d through the control chamber 100f. Specifically, the water collection chamber 100e and the filter chamber 100d are physically isolated.

[0031] The air inlet 100a is equipped with a diversion fan 10, which is an exhaust fan used to introduce ambient gas into the condensation chamber 100c.

[0032] like Figure 2 As shown, a condensing assembly 20 is provided inside the condensing chamber 100c, including a semiconductor cooling chip 22, heat dissipation fins 23, and a condensing plate 21. Specifically, the condensing assembly 20 also includes a fixing frame 22A. The semiconductor cooling chip 22 is embedded in the fixing frame 22A, which is suspended inside the condensing chamber 100c and located directly below the air inlet 100a. In this embodiment, the condensing assembly 20 occupies more than half of the total volume of the condensing chamber 100c, thereby enabling more efficient dehumidification of the incoming ambient gas.

[0033] The condenser plate 21 faces the air inlet 100a and is attached to the cold end of the thermoelectric cooler 22. The heat dissipation fins 23 are attached to the hot end of the thermoelectric cooler 22. The condenser plate 21 dehumidifies the ambient gas and forms condensate on its own surface, thereby forming pretreated gas. Specifically, the upper surface of the thermoelectric cooler 22 forms the cold end and the lower surface forms the hot end.

[0034] At least one condensate channel 21a is formed on the surface of the condenser plate 21. The condensate channel 21a is inclined in the vertical direction and condensate flows out through the lowest point of the edge of the condenser plate 21 through the condensate channel 21a. The lowest point forms an edge drainage section (not shown in the figure). That is, the condensate channel 21a forms an edge drainage section at the open end of the edge of the condenser plate 21. Specifically, there are multiple condensate channels 21a. The multiple condensate channels 21a are parallel to each other and adjacent to each other through a transition arch 21b. The transition arch 21b has a convex arc surface in the vertical direction. So when condensate forms on the surface of the condenser plate 21, the condensate flows along the transition arch 21b into the condensate channel 21a. Then the condensate flows out through the inclined condensate channel 21a and falls onto the bottom wall of the condensation chamber 100c.

[0035] The water collecting chamber 100e is located below the condensing chamber 100c. The top of the water collecting chamber 100e has a water collecting port (not shown in the figure) that communicates with the condensing chamber 100c. The water collecting port is located below the edge drainage section. The condensate generated by the condensing plate flows down from the edge drainage section and into the water collecting chamber 100e from the water collecting port.

[0036] The inner wall of the condensation chamber 100c located near the water inlet has a confluence zone 100g facing the water inlet, and the confluence zone 100g is in the shape of a funnel that monotonically contracts towards the water inlet, so that the water inlet is located at the lowest point of the confluence zone 100g.

[0037] A water collection container 30 is detachably installed inside the water collection cavity 100e. The water collection container 30 is used to collect condensate from the water collection port, and a liquid level sensor (not shown in the figure) is installed at a predetermined height on the inner wall of the water collection container 30. Specifically, when the liquid level sensor sends a signal, the water collection volume of the water collection container 30 is close to the upper limit. At this time, the water collection container 30 should be removed as soon as possible and the condensate inside should be removed.

[0038] An air pump 50 is installed inside the control chamber 100f. The input of the air pump 50 is connected to the condensation chamber 100c, and the output is connected to the filter chamber 100d. Specifically, the air pump 50 draws in pre-treated gas from the condensation chamber 100c and sends the pre-treated gas to the filter chamber 100d. A controller 60 is also installed inside the control chamber 100f. The controller 60 is operated through a control panel on the surface of the filter housing.

[0039] The filter chamber 100d is equipped with an internal partition 40.

[0040] The internal partition 40 divides the interior of the filter chamber 100d into a filter element sub-chamber 40a and a monitoring sub-chamber 40b, with the monitoring sub-chamber 40b opening to the outside through the air outlet 100b.

[0041] The filter element chamber 40a contains a container tube 41 and multiple air filter elements 42.

[0042] The container tube 41 is connected to the condensation chamber 100c via the air pump 50, thereby drawing in pre-treated gas. The container tube 41 also has multiple air passages 41a, which are connected to multiple air filter elements 42. The multiple air filter elements 42 are detachably installed. Specifically, the multiple air filter elements 42 are mounted in the filter element sub-cavities 40a via multiple filter element supports 42A.

[0043] The filter element 42 is designed to remove VOCs from the pretreated gas. The filter element 42 has a large particle removal layer (not shown in the attached diagram) and multiple VOCs removal layers (not shown in the attached diagram). Specifically, the filter element 42 is a filter cartridge, consisting of a microfiber composite mesh, an activated carbon granular layer, and a zeolite granular layer, arranged sequentially from the inside out. The microfiber composite mesh has high mechanical strength and good pre-filtration performance, removing large particles such as dust, hair, and other larger pollutants. As a pre-filtration layer, it protects the subsequent multiple VOCs removal layers from clogging by large particles, extending the overall service life of the filter element 42. The activated carbon granular layer effectively removes VOCs and other harmful gases from the air through physical adsorption. The zeolite in the zeolite granular layer is a porous aluminosilicate mineral with excellent adsorption properties, especially in high humidity environments. Zeolite can effectively adsorb moisture and certain specific VOCs. Even under high humidity conditions, zeolite maintains good adsorption performance and can act as a last line of defense, capturing VOCs that have not been completely adsorbed by the activated carbon.

[0044] The monitoring sub-chamber 40b is connected to the filter element sub-chamber 40a through a controllable valve 43, and a VOCs concentration sensor 44 is installed inside the monitoring sub-chamber 40b. When the VOCs concentration sensor 44 detects that the VOCs concentration in the monitoring sub-chamber 40b exceeds the standard, it means that the filtration performance of the filter element 42 can no longer meet the requirements, or that there is a leak in the sealing connection between the container tube 41, the air pump 50, and the filter element 42.

[0045] The above embodiments are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Various modifications or variations that can be made by those skilled in the art without creative effort within the scope of the appended claims are still within the scope of protection of this patent.

Claims

1. A VOCs filter having an air inlet and an air outlet for filtering particulates and VOCs from ambient air, characterised in that, Having: a communicating condensing cavity and a filtering cavity, the condensing cavity is open to the outside through an air inlet, and a condensing sheet is arranged in the condensing cavity, the filtering cavity is open to the outside through an air outlet, and a filter cartridge is arranged in the filtering cavity, wherein the condensing sheet dehumidifies ambient air to form pretreated air, and the filter cartridge removes VOCs contained in the pretreated air.

2. The VOCs filter of claim 1, wherein, Further comprising: a condensing assembly including a semiconductor refrigeration sheet, a heat dissipation fin, and a condensing sheet, the condensing sheet faces the air inlet, and the condensing sheet is attached to the cold end of the semiconductor refrigeration sheet, and the heat dissipation fin is attached to the hot end of the semiconductor refrigeration sheet.

3. The VOCs filter according to claim 1 or 2, wherein: wherein the air inlet is provided with a flow guide fan for guiding ambient air into the condensing cavity.

4. The VOCs filter according to claim 1 or 2, characterized in that, Further having: a water collecting cavity having a water collecting opening in communication with the condensing cavity, the condensing sheet has an edge water drainage portion, and the water collecting opening is located below the edge water drainage portion, and the condensed water generated by the condensing sheet flows down from the edge water drainage portion and flows into the water collecting cavity from the water collecting opening.

5. The VOCs filter according to claim 4, wherein: wherein a surface of the condensing sheet forms at least one condensed water flow channel, the condensed water flow channel is arranged in a vertical direction, and the condensed water flow channel flows out condensed water through the lowest part of the edge of the condensing sheet, and the lowest part forms the edge water drainage portion.

6. The VOCs filter according to claim 5, wherein: wherein an inner wall of the condensing cavity near the water collecting opening is formed with a converging area facing the water collecting opening, and the converging area is in the shape of a horn mouth monotonously converging towards the water collecting opening, so that the water collecting opening is located at the lowest part of the converging area.

7. The VOCs filter according to claim 4, wherein: wherein a water collecting container is detachably arranged in the water collecting cavity, the water collecting container is used to collect condensed water from the water collecting opening, and a liquid level sensor is arranged at a predetermined height of an inner wall of the water collecting container.

8. The VOCs filter according to claim 1, wherein: wherein an inner cavity partition is arranged in the filtering cavity, the inner cavity partition divides the filtering cavity into a filter cartridge sub-cavity and a monitoring sub-cavity, the filter cartridge is detachably arranged in the filter cartridge sub-cavity, the monitoring sub-cavity is in communication with the filter cartridge sub-cavity through a controllable valve, and a VOCs concentration sensor is arranged in the monitoring sub-cavity.

9. The VOCs filter according to claim 1, wherein: wherein the filter cartridge has a large particle removal layer and a plurality of VOCs removal layers.

10. The VOCs filter of claim 1, wherein, Further having: a control cavity in which a suction pump is arranged, an input of the suction pump is in communication with the condensing cavity, and an output of the suction pump is in communication with the filtering cavity, a container pipe body is further arranged in the filtering cavity and in communication with the condensing cavity through the suction pump, the container pipe body has at least one air passage, and the at least one air passage is in communication with the at least one filter cartridge.

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