Front-end filtering device and range hood
By using the electrodes of a plasma generator component in a range hood to break down the gas and form plasma, the problem of grease buildup on the range hood filter is solved, achieving oil fume purification and smooth airflow, thus improving smoke extraction efficiency and air quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-03-03
AI Technical Summary
Existing range hood filters are prone to grease buildup after long-term use, which obstructs airflow, reduces smoke extraction efficiency, affects indoor air quality, and harms health.
The system employs a plasma generating component, including a first electrode and a second electrode, to generate plasma by energizing and breaking down the gas. It then uses the principle of thermal oxidation and combustion to convert oil fume particles into harmless substances, thereby reducing oil sludge formation and purifying the oil fumes.
It effectively reduces grease buildup, prevents airflow obstruction, enhances smoke extraction, improves indoor air quality, and protects human health.
Smart Images
Figure CN223965472U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of kitchen appliances, specifically to a front-end filtration device and a range hood. Background Technology
[0002] Existing range hoods typically use filters to filter cooking fumes, but after long-term use, grease can easily accumulate on the filters, which can obstruct airflow, reduce the smoke extraction effect, and negatively impact the filtration effect, thus lowering indoor air quality after cooking and potentially harming human health. Utility Model Content
[0003] This utility model provides a front-end filtration device and a range hood, which can filter oil fumes in advance and reduce the formation of grease, avoid obstructing airflow, prevent negative impacts on smoke extraction and filtration effects, and avoid reducing indoor air quality after cooking and harming human health.
[0004] The embodiments of this utility model can be implemented as follows:
[0005] An embodiment of this utility model provides a front-end filtration device, which includes:
[0006] The smoke inlet pipe is equipped with an air inlet and a smoke passage; and
[0007] A plasma generating assembly includes a first electrode and a second electrode, which are spaced apart inside a smoke inlet pipe, and a gas passage is formed between the first electrode and the second electrode.
[0008] The air inlet, air passage, and smoke passage are connected in sequence.
[0009] Optionally, the second electrode is sleeved on the outside of the first electrode.
[0010] Optionally, the end of the second electrode near the smoke passage protrudes beyond the end of the first electrode near the smoke passage.
[0011] Optionally, the smoke inlet pipe includes a pipe body and an insulating cover connected to each other. The first electrode and the second electrode are both connected to the insulating cover and extend toward the pipe body. The air inlet is opened in the insulating cover, and the smoke passage is formed in the pipe body.
[0012] Optionally, a smoke inlet hole is formed on the pipe body, which is connected to the smoke passage, and the air inlet hole is set higher than the smoke inlet hole.
[0013] Optionally, the air inlet is located on the rear plate surface of the insulating cover, and the smoke inlet is located on the front plate surface of the pipe body, with the front plate surface and the rear plate surface facing each other.
[0014] Optionally, the insulating cover includes a support plate and a base plate connected together, the tube body is connected to the base plate, the air inlet is formed on the support plate, the first electrode is connected to at least one of the support plate and the base plate, the second electrode is connected to the base plate, the second electrode is sleeved on the first electrode, the base plate has a first guide hole, the first electrode has a second guide hole, the first guide hole is connected between the air inlet and the second guide hole, and the end of the second guide hole away from the first guide hole is connected to the air passage.
[0015] Optionally, the first electrode includes an electrode needle, an electrode base, and an electrode head. The electrode needle is connected to both the support plate and the electrode head. The electrode base is sleeved on the electrode needle and connected to the electrode head. A second guide hole is formed in the electrode base.
[0016] Optionally, the second electrode includes an electrode tube and an electrode tube seat, the electrode tube seat is connected to the base plate, the electrode tube passes through the electrode tube seat, and the electrode tube is sleeved on the first electrode to form an air passage.
[0017] An embodiment of this utility model also provides a range hood, comprising:
[0018] Smoke collection chamber and front-end filter device;
[0019] The smoke collection chamber is connected to the smoke inlet pipe, and the output end of the air passage is set towards the smoke collection chamber.
[0020] The beneficial effects of the front-end filtration device and range hood of this utility model embodiment include, for example:
[0021] This front-end filtration device includes a smoke inlet pipe and a plasma generating assembly. The smoke inlet pipe has an air inlet and a smoke outlet channel. The plasma generating assembly includes a first electrode and a second electrode, which are spaced apart within the smoke inlet pipe, forming a smoke outlet channel between them. The air inlet, the smoke outlet channel, and the smoke outlet channel are sequentially connected. During operation, the air inlet is used to input gas into the smoke outlet channel, while the first and second electrodes are energized to break down the gas and generate plasma. The plasma, based on the principle of thermal oxidation combustion, converts oil fume particles and other pollutants in the smoke outlet channel into harmless substances, thereby purifying the oil fumes. This front-end filtration device reduces the formation of grease, avoids obstructing airflow, prevents negative impacts on smoke extraction and filtration effects, and avoids deterioration of indoor air quality after cooking, thus protecting human health.
[0022] The range hood includes a smoke collection chamber and a front-end filter device; the smoke collection chamber is connected to the smoke inlet pipe, and the output end of the air passage is set towards the smoke collection chamber. The front-end filter device has all the functions of a front-end filter device. Attached Figure Description
[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the structure of the range hood provided in an embodiment of this utility model;
[0025] Figure 2 This is a schematic diagram of the front-end filtration device provided in an embodiment of the present invention;
[0026] Figure 3 This is an exploded view of the first electrode, the second electrode, and the insulating cover provided in an embodiment of this utility model.
[0027] Icons: 100-Front-end filter device; 110-Smoke inlet pipe; 111-Pipe body; 1111-Smoke inlet hole; 1112-Front panel; 1113-Smoke passage; 115-Insulating cover; 1152-Rear panel; 116-Cover plate; 117-Support plate; 1171-Air inlet hole; 1172-Third guide hole; 118-Bottom plate; 1181-First guide hole; 120-Plasma generator assembly; 121-First electrode; 122-Electrode needle; 123-Electrode seat; 124-Electrode head; 1231-Second guide hole; 125-Second electrode; 126-Electrode tube; 127-Electrode tube seat; 1271-Fourth guide hole; 130-Air passage; 200-Smoke collection chamber; 1000-Range hood. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0031] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0032] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0033] The terms “comprising,” “including,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0034] Unless otherwise explicitly specified and limited, terms such as "setup" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0035] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.
[0036] Please refer to Figure 1 and Figure 2 The front-end filter device 100 and range hood 1000 provided in the embodiments of this utility model can solve the above problems, and will be described in detail below.
[0037] The front-end filter device 100 is applied to the range hood 1000. The front-end filter device 100 includes a smoke inlet pipe 110 and a plasma generating component 120. The smoke inlet pipe 110 is provided with an air inlet 1171 and a smoke outlet channel 1113. The plasma generating component 120 includes a first electrode 121 and a second electrode 125. The first electrode 121 and the second electrode 125 are spaced apart in the smoke inlet pipe 110. An air outlet channel 130 is formed between the first electrode 121 and the second electrode 125. The air inlet 1171, the air outlet channel 130 and the smoke outlet channel 1113 are connected in sequence.
[0038] During operation, the air inlet 1171 is used to input gas into the air passage 130. The first electrode 121 and the second electrode 125 are used to conduct electricity and use the electricity to break down the gas to form plasma. The plasma can convert particulate matter and other substances in the fumes in the smoke passage 1113 into harmless substances based on the principle of thermal oxidation combustion, thereby purifying the fumes. This front-end filter device 100 can reduce the formation of grease, avoid obstructing airflow, prevent negative impacts on smoke extraction and filtration effects, and prevent the reduction of indoor air quality after cooking from harming human health.
[0039] Specifically, the formation of plasma can convert electrical energy into thermal energy. With a continuous supply of gas through the gas passage 130, a jet-like thermal plasma beam with flame-like characteristics can be formed. The maximum temperature of the thermal plasma beam can reach 1200℃. The heat generated by its combustion can be used for oxidation reactions, thereby harmlessly treating the particulate matter in the oil fume and achieving the purpose of purifying the oil fume.
[0040] Please refer to Figure 2 The smoke inlet pipe 110 includes a pipe body 111 and an insulating cover 115 connected to each other. The first electrode 121 and the second electrode 125 are both connected to the insulating cover 115 and extend toward the pipe body 111. The pipe body 111 has a smoke inlet hole 1111, which is connected to the smoke passage 1113. The air inlet hole 1171 is opened on the insulating cover 115.
[0041] During the fume extraction process, the fumes can enter the fume discharge channel 1113 through the fume inlet 1111. The insulating cover 115 is used to provide insulation support for the first electrode 121 and the second electrode 125, preventing safety hazards due to power leakage during the conduction process.
[0042] Please refer to Figure 2 In order to ensure the purity of the gas input through the air inlet 1171 so as to better generate plasma, the air inlet 1171 can be located on the rear plate surface 1152 of the insulating cover 115, while the smoke inlet 1111 is located on the front plate surface 1112 of the tube body 111, and the front plate surface 1112 is arranged opposite to the rear plate surface 1152.
[0043] Furthermore, the air inlet 1171 can be positioned higher than the smoke inlet 1111, so that when the fumes reach a suitable height, they are drawn into the smoke inlet 1111, further reducing the chance of fumes mixing into the air inlet 1171.
[0044] Please refer to Figure 2 and Figure 3 The insulating cover 115 includes a support plate 117 and a base plate 118 connected to each other. The tube body 111 is connected to the base plate 118. The air inlet 1171 is formed in the support plate 117. The first electrode 121 is connected to at least one of the support plate 117 and the base plate 118. The second electrode 125 is connected to the base plate 118 and sleeved on the first electrode 121. The base plate 118 has a first guide hole 1181 and the first electrode 121 has a second guide hole 1231. The first guide hole 1181 and the second guide hole 1231 are sequentially connected between the air inlet 1171 and the air passage 130.
[0045] In this embodiment, the first electrode 121 is connected to both the support plate 117 and the base plate 118. When the gas passes through the air inlet 1171, it will enter the space between the base plate 118 and the support plate 117, and then pass through the first guide hole 1181 and the second guide hole 1231 in sequence, and finally enter the gas passage 130 and generate plasma under the action of electricity.
[0046] It is worth noting that during operation, one end of the first electrode 121 can be connected to the positive terminal of the power supply box via a wire, and one end of the second electrode 125 can be connected to the negative terminal of the power supply box via a wire. Thus, in the energized state, power can be conducted between the other end of the first electrode 121 and the other end of the second electrode 125.
[0047] Please refer to Figure 2 and Figure 3 In order to ensure that the air passage 130 has sufficient space, the second electrode 125 can be sleeved on the outside of the first electrode 121, so that the air passage 130 is annular, which facilitates sufficient air circulation.
[0048] Furthermore, the end of the second electrode 125 near the smoke passage 1113 can be positioned to protrude from the end of the first electrode 121 near the smoke passage 1113, thereby making the formed thermal plasma beam more focused and less likely to disperse in all directions, and making the thermal plasma beam appear as a flame, so as to increase the contact area with the oil fumes in the smoke passage 1113.
[0049] Specifically, the first electrode 121 includes an electrode needle 122, an electrode base 123, and an electrode head 124. The electrode needle 122 is connected to both the support plate 117 and the electrode head 124. The electrode base 123 is sleeved on the electrode needle 122 and connected to the electrode head 124. A second guide hole 1231 is formed in the electrode base 123.
[0050] Furthermore, the support plate 117 is provided with a third guide hole 1172, through which the electrode needle 122 passes. The electrode needle 122 has a radial protrusion that abuts against the upper surface of the support plate 117, so as to limit the relative position of the electrode needle 122 connected to the support plate 117 and prevent the electrode needle 122 from easily falling off under the influence of gravity.
[0051] During assembly, the separate design of the electrode needle 122, electrode base 123, and electrode head 124 improves assembly efficiency. Furthermore, if any one of these components is damaged, only the damaged part needs to be replaced, rather than all components, thus reducing maintenance costs.
[0052] Please refer to Figure 2 and Figure 3 In order to shield and protect the support plate 117 and electrode needle 122 from the top and improve the overall aesthetics of the insulating cover 115, the insulating cover 115 may also include a cover plate 116, which is connected to the top of the support plate 117 and located on the upper side of the electrode needle 122.
[0053] In this embodiment, the support plate 117 is a plate-shaped structure with protruding edges and both the top and bottom facing the central depression, so that the inner side of the support plate 117 has enough space to facilitate the flow of gas between the bottom plate 118 and the support plate 117 through the air inlet 1171.
[0054] Please refer to Figure 2 and Figure 3 The second electrode 125 includes an electrode tube 126 and an electrode tube seat 127. The electrode tube seat 127 is connected to the base plate 118. The electrode tube 126 passes through the electrode tube seat 127 and is sleeved on the first electrode 121 to form an air passage 130.
[0055] During assembly, the electrode tube 126 and electrode tube holder 127 are designed as separate units, which improves the efficiency of disassembly and assembly. Furthermore, if either the electrode tube 126 or the electrode tube holder 127 is damaged, only the damaged part can be replaced instead of replacing both, thereby reducing maintenance costs.
[0056] In this embodiment, the electrode holder 127 is elongated, with its two ends connected to the two ends of the base plate 118 along its length. A fourth guide hole 1271 is provided on the electrode holder 127 for accommodating the bottom ends of the electrode tube 126, the electrode head 124, and the electrode base 123. Of course, in other embodiments of this invention, the electrode holder 127 can also have other shapes, and its specific appearance is not limited.
[0057] Furthermore, in order to facilitate the formation of a flame-shaped thermal plasma beam, the bottom end of the electrode tube 126 can be tapered, and the inner diameter of the electrode tube 126 gradually decreases from top to bottom.
[0058] Please refer to Figure 1 An embodiment of this utility model also provides a range hood 1000, including a smoke collection chamber 200 and a front-end filter device 100; wherein, the smoke collection chamber 200 is connected to the bottom end of the smoke inlet pipe 110, and the output end of the air passage 130 is disposed facing the smoke collection chamber 200. The range hood 1000 includes the front-end filter device 100, which has all the functions of the front-end filter device 100.
[0059] In summary, the front-end filter device 100 and the range hood 1000 provided by the embodiments of this utility model have at least the following advantages:
[0060] (1) By setting the first electrode 121 and the second electrode 125, plasma is formed by using electricity to break down the gas in the energized state. The plasma can convert the particulate matter in the smoke inlet pipe 110 into harmless substances according to the thermal oxidation combustion principle, thereby purifying the smoke and reducing the formation of grease, avoiding obstruction of airflow, preventing negative impact on the smoke extraction and filtration effects, and avoiding the reduction of indoor air quality after cooking, which could harm human health.
[0061] (2) By setting the air inlet 1171 on the rear panel 1152 and the smoke inlet 1111 on the front panel 1112, and setting the air inlet 1171 higher than the smoke inlet 1111, the oil fumes will preferentially enter the smoke inlet 1111, reducing the chance of oil fumes mixing into the air inlet 1171, thereby ensuring that the air inlet 1171 can draw in air that is not mixed with oil fumes.
[0062] (3) By setting both the first electrode 121 and the second electrode 125 as separate structures, the disassembly and assembly efficiency can be improved; and when a single component is damaged, it is not necessary to replace both the first electrode 121 and the second electrode 125, thereby reducing maintenance costs.
[0063] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A front-end filtration device, characterized in that, include: A smoke inlet pipe (110), wherein the smoke inlet pipe (110) is provided with an air inlet (1171) and a smoke passage (1113); and A plasma generating assembly (120) includes a first electrode (121) and a second electrode (125). The first electrode (121) and the second electrode (125) are spaced apart in the smoke inlet pipe (110), and an air passage (130) is formed between the first electrode (121) and the second electrode (125). The air inlet (1171), the air passage (130), and the smoke passage (1113) are connected in sequence.
2. The front-end filtration device according to claim 1, characterized in that, The second electrode (125) is sleeved on the outside of the first electrode (121).
3. The front-end filtration device according to claim 2, characterized in that, The second electrode (125) protrudes from the end of the smoke passage (1113) near the smoke passage (1113) of the first electrode (121).
4. The front-end filtration device according to any one of claims 1-3, characterized in that, The smoke inlet pipe (110) includes a pipe body (111) and an insulating cover (115) connected to each other. The first electrode (121) and the second electrode (125) are both connected to the insulating cover (115) and extend toward the pipe body (111). The air inlet (1171) is opened in the insulating cover (115), and the smoke passage (1113) is formed in the pipe body (111).
5. The front-end filtration device according to claim 4, characterized in that, A smoke inlet hole (1111) is formed on the pipe body (111), the smoke inlet hole (1111) is connected to the smoke passage (1113), and the air inlet hole (1171) is set higher than the smoke inlet hole (1111).
6. The front-end filtration device according to claim 5, characterized in that, The air inlet (1171) is located on the rear plate surface (1152) of the insulating cover (115), and the smoke inlet (1111) is located on the front plate surface (1112) of the pipe body (111). The front plate surface (1112) and the rear plate surface (1152) are arranged opposite to each other.
7. The front-end filtration device according to claim 4, characterized in that, The insulating cover (115) includes a support plate (117) and a base plate (118) connected to each other. The tube body (111) is connected to the base plate (118). The air inlet (1171) is formed on the support plate (117). The first electrode (121) is connected to at least one of the support plate (117) and the base plate (118). The second electrode (125) is connected to the base plate (118) and is sleeved on the first electrode (121). The base plate (118) has a first guide hole (1181). The first electrode (121) has a second guide hole (1231). The first guide hole (1181) communicates between the air inlet (1171) and the second guide hole (1231). The end of the second guide hole (1231) away from the first guide hole (1181) is connected to the air passage (130).
8. The front-end filtration device according to claim 7, characterized in that, The first electrode (121) includes an electrode needle (122), an electrode base (123), and an electrode head (124). The electrode needle (122) is connected to both the support plate (117) and the electrode head (124). The electrode base (123) is sleeved on the electrode needle (122) and connected to the electrode head (124). The second guide hole (1231) is formed in the electrode base (123).
9. The front-end filtration device according to claim 7, characterized in that, The second electrode (125) includes an electrode tube (126) and an electrode tube seat (127). The electrode tube seat (127) is connected to the base plate (118). The electrode tube (126) passes through the electrode tube seat (127) and is sleeved on the first electrode (121) to form the air passage (130).
10. A range hood, characterized in that, include: The smoke collection chamber (200) and the front-end filter device according to any one of claims 1-9; The smoke collection chamber (200) is connected to the smoke inlet pipe (110), and the output end of the air passage (130) is arranged facing the smoke collection chamber (200).