Oil fume purification system and range hood

Abstract

The present application relates to the technical field of kitchen appliances, and discloses an oil fume purification system and a range hood, the oil fume purification system comprising: a smoke pipe body for discharging oil fume; and a plasma generating device connected to one end of the smoke pipe body, the plasma generating device being in communication with the smoke pipe body, the plasma generating device comprising an annular cavity, the annular cavity being provided with spirally distributed electrodes, the plasma released in the annular cavity being in contact with the oil fume in the smoke pipe body. After the plasma oil fume purification device is powered on, plasma will be generated in the airflow, and since the discharge current flowing through the spiral electrode can obtain a larger axial magnetic field inside the spiral electrode, the plasma diffusing to the surroundings is effectively constrained, and the axial plasma number density is increased, which greatly improves the purification effect.

Description

Technical Field

[0001] The present application relates to the technical field of bathroom appliances, and in particular to an oil fume purification system and a range hood. Background Art

[0002] The oil fume produced during cooking contains many toxic and carcinogenic substances, which will have a serious impact on people's health. Therefore, the treatment of oil fume has attracted more and more attention. In the past, the method of simply exhausting indoor oil fume to the outside can no longer meet people's current pursuit of high-quality life. There is an urgent need for oil fume treatment and purification technology to purify oil fume and reduce the pollution of oil fume to the environment and its impact on human health.

[0003] Oil fume is the smoke gradually produced when cooking oil and food are heated at high temperatures during cooking. The composition of oil fume is very complex, mainly including volatile oils, alkanes, aldehydes, alcohol esters, aromatic compounds, etc., containing more than 200-300 pollutants. At the same time, oil fume also contains many toxic chemical components, such as polycyclic aromatic hydrocarbons. Oil fume not only affects people's living environment and physical health, but also has a great pollution to the environment. When oil fume is discharged outdoors, it will adhere to buildings and other objects, affecting the beauty of the objects. In addition, harmful gases such as short-chain aldehydes, ketones, acids, and alcohols contained in oil fume are discharged outdoors, causing the formation of haze. People who stay in a haze environment for a long time will have symptoms such as loss of appetite, drowsiness, and mental depression, which seriously affect human health.

[0004] Plasma contains oxidative active particles (such as OH, O, O3, etc.). These particles have high oxidative potential and high reaction rate, and can oxidize some oil compounds in oil smoke, which has a significant improvement effect on the emission of carcinogens in smoke. The plasma generating device in the related art has electrodes arranged along the axial direction, and the axial magnetic field it obtains is weak, which cannot restrain the plasma that spreads to the surroundings, so the purification effect is not ideal. Summary of the invention

[0005] In order to solve the technical problem in the related art that the plasma generating device has a weak ability to obtain an axial magnetic field, the present application provides an oil fume purification system and a range hood.

[0006] In a first aspect, the present application provides an oil fume purification system, comprising:

[0007] A smoke pipe body, used for discharging oil smoke; and

[0008] A plasma generating device is connected to one end of the smoke pipe body, the plasma generating device is communicated with the smoke pipe body, the plasma generating device comprises an annular cavity, a spirally distributed electrode is arranged in the annular cavity, and the plasma released in the annular cavity contacts the oil smoke in the smoke pipe body.

[0009] In one embodiment of the present application, the annular cavity comprises:

[0010] an inner ring having a first annular inner wall, wherein the first annular inner wall is used to mount any one of the anode and the cathode; and

[0011] An outer ring having a second annular inner wall coaxially arranged with the first annular inner wall, wherein the second annular inner wall is used for mounting the other of the anode and the cathode;

[0012] The annular cavity is formed between the inner ring and the outer ring, and the electrode is spirally connected between the cathode and the anode.

[0013] In one embodiment of the present application, a check valve is further included, and the plasma generating device is connected between the smoke pipe body and the check valve.

[0014] In one embodiment of the present application, the inner diameter of the plasma generating device is the same as the inner diameter of the air outlet of the check valve.

[0015] In one embodiment of the present application, the plasma generating device and the check valve are both made of glass or ceramic.

[0016] In one embodiment of the present application, the diameter of the electrode is d, the pitch of the electrode is s, and the difference between the inner diameter and the outer diameter of the annular cavity is h, wherein 2d≤s≤4d, 1.5s≤h≤3s.

[0017] In one embodiment of the present application, the diameter of the electrode is d, wherein 0.5 mm<d<1.3 mm.

[0018] In one embodiment of the present application, the pitch of the electrode is s, where s=4 mm.

[0019] In one embodiment of the present application, the difference between the inner diameter and the outer diameter of the annular cavity is h, where h≥8mm.

[0020] In one embodiment of the present application, a power supply device is further included, and the power supply device is connected to the cathode and the anode respectively through external wires.

[0021] In one embodiment of the present application, the power supply device is an AC power supply, and the voltage of the AC power supply is 4-6kV and the frequency is 18-22kHz.

[0022] In one embodiment of the present application, both end surfaces of the annular cavity are sealed.

[0023] In one embodiment of the present application, a vertical distance between two end surfaces of the annular cavity is H, wherein 50 mm ≤ H ≤ 150 mm.

[0024] In one embodiment of the present application, an insulating medium is introduced into the annular cavity, and the insulating medium is an insulating gas or an insulating liquid.

[0025] In one embodiment of the present application, the first annular inner wall has a connecting portion, and the connecting portion can be opened and closed in a controlled manner. The connecting portion is used to connect the plasma in the annular cavity and the oil smoke in the smoke pipe body.

[0026] In a second aspect, the present application provides a range hood, comprising a body and the oil fume purification system described in any one of the embodiments of the first aspect, wherein the body is connected to an end of the smoke pipe body away from the plasma generating device.

[0027] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0028] On the one hand, the oil fume purification system provided in the embodiment of the present application improves the defects of the prior art. After the plasma generating device of the present application is powered on, a large amount of plasma will be generated in the annular cavity. In addition, since the discharge current flowing through the spiral electrode can obtain a larger axial magnetic field inside the spiral electrode, the plasma diffusing to the surroundings is effectively constrained, and the axial plasma number density is increased, so that more plasma is in contact with the oil fume, which greatly improves the oil fume purification effect.

[0029] On the other hand, the range hood provided in the embodiment of the present application will generate a large amount of oil smoke when the machine body is in operation, which is discharged through the smoke pipe body. Before the discharge, the installation of a plasma generating device can effectively reduce the content of toxic or carcinogenic substances emitted into the air by the range hood, thereby achieving a purification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0032] Figure 1 A three-dimensional diagram of the oil fume purification system provided in an embodiment of the present application;

[0033] Figure 2 A plan view of the oil fume purification system provided in an embodiment of the present application from a first perspective;

[0034] Figure 3 A plan view of the oil fume purification system provided in an embodiment of the present application from a second perspective;

[0035] Figure 4 Based on Figure 3 AA section view;

[0036] Figure 5 A plan view of the oil fume purification system provided by an embodiment of the present application from a third perspective;

[0037] Figure 6 Based on Figure 5 BB section view.

[0038] Reference numerals:

[0039] 1. Smoke tube host; 2. Plasma generating device; 21. Annular cavity; 22. Inner ring; 221. First annular inner wall; 23. Outer ring; 231. Second annular outer wall; 24. Anode; 25. Cathode; 26. Electrode; 27. Insulating medium; 28. External wire; 3. Check valve. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0041] The oil fume produced during cooking contains many toxic and carcinogenic substances, which will have a serious impact on people's health. Therefore, the treatment of oil fume has attracted more and more attention. In the past, the method of simply exhausting indoor oil fume to the outside can no longer meet people's current pursuit of high-quality life. There is an urgent need for oil fume treatment and purification technology to purify oil fume and reduce the pollution of oil fume to the environment and its impact on human health.

[0042] Oil fume is the smoke gradually produced when cooking oil and food are heated at high temperatures during cooking. The composition of oil fume is very complex, mainly including volatile oils, alkanes, aldehydes, alcohol esters, aromatic compounds, etc., containing more than 200-300 pollutants. At the same time, oil fume also contains many toxic chemical components, such as polycyclic aromatic hydrocarbons. Oil fume not only affects people's living environment and physical health, but also has a great pollution to the environment. When oil fume is discharged outdoors, it will adhere to buildings and other objects, affecting the beauty of the objects. In addition, harmful gases such as short-chain aldehydes, ketones, acids, and alcohols contained in oil fume are discharged outdoors, causing the formation of haze. People who stay in a haze environment for a long time will have symptoms such as loss of appetite, drowsiness, and mental depression, which seriously affect human health.

[0043] Plasma contains oxidative active particles (such as OH, O, O3, etc.). These particles have high oxidative potential and high reaction rate, and can oxidize some oil compounds in oil smoke, which has a significant improvement effect on the emission of carcinogens in smoke. The plasma generating device in the related art has electrodes arranged along the axial direction, and the axial magnetic field it obtains is weak, which cannot restrain the plasma that spreads to the surroundings, so the purification effect is not ideal.

[0044] In order to solve the technical problem in the related art that the plasma generating device has a weak ability to obtain an axial magnetic field, the present application provides an oil fume purification system, including: a smoke pipe main body, used to discharge oil fume; and a plasma generating device, connected to one end of the smoke pipe main body, the plasma generating device is communicated with the smoke pipe main body, the plasma generating device includes an annular cavity, and the annular cavity is provided with spirally distributed electrodes, and the plasma released in the annular cavity contacts the oil fume in the smoke pipe main body.

[0045] Among them, it is necessary for those skilled in the art to understand that an insulating medium needs to be introduced into the annular cavity, and the insulating medium can be an insulating liquid or an insulating gas, wherein the insulating liquid can be silicone oil. The characteristics of the organic silicone compound are taken as an example, Ucarsil PA-1 organic silicone compound of UCC Company of the United States, whose density is 1.018 g / cm, kinematic viscosity is 1.2×10. ni / s, and it is a brown liquid, which is easily soluble in alcohols, aromatic hydrocarbons and halogenated hydrocarbons, and is in liquid state. The insulating gas can be sulfur hexafluoride, which has excellent insulating properties. Under normal air pressure, the insulating strength of this gas is 2.4 times greater than that of air and about 30% lower than that of transformer oil; when the air pressure increases to 0.65 meter atmospheric pressure, its insulating strength is equal to that of transformer oil; when the air pressure increases to 1.25 meter atmospheric pressure, its insulating strength is about 15% higher than that of transformer oil. Therefore, in high-voltage electrical appliances, using sulfur hexafluoride as an insulating medium can reduce the size of the insulating gap and reduce the volume of the electrical appliance.

[0046] In order to have a more specific understanding of the technical ideas of the present application, the exemplary embodiments are described below in conjunction with the accompanying drawings:

[0047] like Figure 1-6 As shown, the present application provides an oil fume purification system, a smoke pipe body 1, used to discharge oil fume; and a plasma generator 2, connected to one end of the smoke pipe body 1, the plasma generator 2 is connected to the smoke pipe body 1, the plasma generator 2 includes an annular cavity 21, and a spirally distributed electrode 26 is arranged in the annular cavity 21, and the plasma released in the annular cavity 21 contacts the oil fume in the smoke pipe body 1. The smoke pipe body 1 and the plasma generator 2 are coaxially arranged, and the internal channel of the smoke pipe body 1 is connected to the internal channel of the annular cavity 21.

[0048] The oil fume purification system provided in the embodiment of the present application improves the defects of the prior art. After the plasma generating device 2 of the present application is powered on, a large amount of plasma will be generated in the annular cavity 21, and since the discharge current flowing through the spiral electrode 26 can obtain a larger axial magnetic field inside the spiral electrode 26, the plasma diffusing to the surroundings is effectively restrained, and the axial plasma number density is increased, so that more plasma is in contact with the oil fume, which greatly improves the oil fume purification effect.

[0049] For the annular cavity 21, the annular cavity 21 includes: an inner ring 22, having a first annular inner wall 221, the first annular inner wall 221 is used to install any one of the anode 24 and the cathode 25; and an outer ring 23, having a second annular inner wall 231, coaxially arranged with the first annular inner wall 221, the second annular inner wall 231 is used to install the other of the anode 24 and the cathode 25; wherein the annular cavity 21 is formed between the inner ring 22 and the outer ring 23, and the electrode 26 is spirally connected between the cathode 25 and the anode 24.

[0050] In some embodiments, a check valve 3 is further included, and the plasma generator 2 is connected between the smoke pipe body 1 and the check valve 3. By installing the spirally discharged plasma generator 2 behind the check valve 3, the content of toxic or carcinogenic substances emitted into the air by the range hood can be effectively reduced, and the structure does not require the range hood to be remodeled, and can be directly installed on the basis of the existing range hood, which is easy to operate.

[0051] Furthermore, in order to avoid the appearance of steps on the air outlet pipe wall of the check valve 3 that affect the air outlet performance, the inner diameter of the plasma generating device 2 is the same as the inner diameter of the air outlet of the check valve 3, so that the air outlet is smooth and the exhaust efficiency is improved.

[0052] In some embodiments, the plasma generator 2 and the check valve 3 are made of the same material. Specifically, the plasma generator 2 and the check valve 3 are both made of glass or ceramic. Glass or ceramic materials help the electrode 26 to work stably.

[0053] In some embodiments, the diameter of the electrode 26 is d, the pitch of the electrode 26 is s, and the difference between the inner diameter and the outer diameter of the annular cavity 21 is h, wherein 2d≤s≤4d, 1.5s≤h≤3s. The diameter of the electrode 26 is d, wherein 0.5mm<d<1.3mm. Specifically, the diameter of the electrode 26 is 1mm. The pitch of the electrode 26 is s, wherein s=4mm. The difference between the inner diameter and the outer diameter of the annular cavity 21 is h, wherein h≥8mm. The diameter d of the electrode 26 is 0.5-1.3mm, and the pitch s is at least 2 times the diameter d, but not more than 4 times, and the shortest distance between the cathode 25 and the anode 24 (i.e., the difference h between the inner diameter and the outer diameter of the annular cavity 21) is 1.5-3 times the pitch s.

[0054] As for the power supply mode of the cathode 25 and the anode 24, a power supply device is also included, and the power supply device is respectively connected to the cathode 25 and the anode 24 through an external wire 28. The power supply device is an AC power supply, and the voltage of the AC power supply is 4-6kV and the frequency is 18-22kHz, which can be obtained by processing the AC power supply of the range hood through a transformer. Specifically, the power supply is an AC power supply with a voltage of 5kV and a frequency of 20kHz.

[0055] In some embodiments, both end surfaces of the annular cavity 21 are sealed. Specifically, the vertical distance between the two end surfaces of the annular cavity 21 is H, wherein 50 mm ≤ H ≤ 150 mm. Preferably, the vertical distance H between the two end surfaces of the annular cavity 21 is 100 mm.

[0056] In some embodiments, the first annular inner wall 221 has a connecting portion, which can be controlled to open and close, and the connecting portion is used to connect the plasma in the annular cavity 21 and the oil smoke in the smoke pipe body 1. Specifically, the connecting portion can be a plurality of controllable opening and closing connecting holes. When a large amount of plasma is generated in the internal channel of the plasma generating device 2, all the connecting holes are closed. When a large amount of plasma is waiting to be released, the connecting holes are opened to make the oil smoke and plasma contact, thereby playing a purification role. Further, the opening and closing of the connecting holes can be controlled by a control device. The first annular inner wall 221 is evenly distributed with a plurality of connecting holes, and each of the connecting holes is rotatably connected with a cover body. Each of the cover bodies and the connecting holes is opened and closed by rotating axles. Each rotating shaft is respectively connected to a micro-control motor, and each micro-control motor is controlled to start or stop by a control device. Thus, when plasma is generated, the annular cavity 21 can be sealed to prevent the insulating medium 27 from overflowing. After the plasma is generated, each connecting hole is opened to make the plasma and the oil smoke contact, thereby playing a purification effect. The above method prevents the insulating medium 27 from contaminating the range hood while playing a good purification effect.

[0057] In a second aspect, the present application provides a range hood, comprising a machine body and the oil fume purification system according to any one of the embodiments of the first aspect, wherein the machine body is connected to one end of the smoke pipe body 1 away from the plasma generator 2. When the machine body is in operation, a large amount of oil fume is generated, which is discharged through the smoke pipe body 1. Before the discharge, the plasma generator 2 is installed, which can effectively reduce the content of toxic or carcinogenic substances emitted into the air by the range hood, and can achieve a purification effect.

[0058] When the present embodiment is used, after the range hood is turned on, the user can selectively turn on the plasma generator 2. If the user chooses to turn on the device, the device starts to run and purifies the range hood smoke. The plasma generator 2 is mainly composed of 5 parts, a first annular inner wall 221, a second annular inner wall 231, an anode 24, a cathode 25 and silicone oil (insulating medium 27). The anode 24 is installed at a position close to the first annular inner wall 221 of the annular cavity 21, and the cathode 25 is installed at a position close to the second annular inner wall 231 of the annular cavity 21. The interior of the annular cavity 21 is filled with the insulating medium 27 silicone oil, and the two end surfaces of the annular cavity 21 are sealed. The anode 24 and the cathode 25 are both connected to the plasma generator 2 with an external wire 28, and the power supply of the plasma generator 2 can be connected through the external wire 28. The power supply is an AC power supply with a voltage of 5kV and a frequency of 20kHz, which can be obtained by the external power supply of the range hood through a transformer. The installation position of the plasma generator 2 is between the check valve 3 of the range hood and the smoke pipe body 1, and the inner diameter of the plasma generator 2 is the same as the inner diameter of the air outlet of the check valve 3, so as to avoid the appearance of steps on the air outlet wall to affect the air outlet performance. The vertical distance between the two end faces of the annular cavity 21 of the plasma generator 2 is 100mm, and the material of the plasma generator 2 is made of glass or ceramic, which helps the electrode 26 to work stably; the material of the electrode 26 is copper or lead, and is a cylindrical structure with a diameter d of 1mm, and the cylindrical spiral is placed between the first annular inner wall 221 and the second annular inner wall 231, the pitch s is 4mm, and the shortest distance between the cathode 25 and the anode 24 is 8mm. After the plasma generator 2 is powered on, plasma will be generated in the airflow, and because the discharge current flowing through the spiral electrode 26 can obtain a larger axial magnetic field inside the spiral electrode 26, the plasma that diffuses to the surroundings is effectively constrained, and the axial plasma number density is increased, which greatly improves the purification effect.

[0059] It should be noted that, in the specification and claims of the present application and the above-mentioned drawings, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or specific order or precedence between these entities or operations. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0060] Moreover, the terms "comprises," "comprising," and "having," and any variations thereof or any other variants thereof, are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus. For example, a process, method, system, product, or apparatus comprising a series of steps or units need not be limited to those steps or units expressly listed, but may include other steps or units not expressly listed or inherent to such process, method, product, or apparatus. In the absence of further limitations, an element defined by the statement "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0061] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0062] The above description is only a specific implementation mode of the present application, so that those skilled in the art can understand or implement the present application. It will be obvious to those skilled in the art that various modifications and variations to these embodiments, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied for herein.

Claims

1. A fume purification system, characterized in that: include: The smoke pipe body (1) is used to discharge oil smoke; as well as, A plasma generating device (2) is connected to one end of the smoke pipe body (1), the plasma generating device (2) being in communication with the smoke pipe body (1), the plasma generating device (2) comprising an annular cavity (21), a spirally distributed electrode (26) being arranged in the annular cavity (21), and the plasma released in the annular cavity (21) contacts the oil smoke in the smoke pipe body (1); The annular cavity (21) comprises: an inner ring (22) having a first annular inner wall (221), wherein the first annular inner wall (221) is used to mount any one of the anode (24) and the cathode (25); and An outer ring (23) having a second annular inner wall (231) coaxially arranged with the first annular inner wall (221), wherein the second annular inner wall (231) is used to mount the other of the anode (24) and the cathode (25); The annular cavity (21) is formed between the inner ring (22) and the outer ring (23), and the electrode (26) is connected in a spiral shape between the cathode (25) and the anode (24).

2. The oil fume purification system according to claim 1, characterized in that: It also comprises a check valve (3), and the plasma generating device (2) is connected between the smoke pipe body (1) and the check valve (3).

3. The oil fume purification system according to claim 2, characterized in that: The inner diameter of the plasma generating device (2) is the same as the inner diameter of the air outlet of the check valve (3).

4. The oil fume purification system according to claim 2, characterized in that: The plasma generating device (2) and the check valve (3) are both made of glass or ceramic.

5. The oil fume purification system according to claim 1, characterized in that: The diameter of the electrode (26) is d, the pitch of the electrode (26) is s, and the difference between the inner diameter and the outer diameter of the annular cavity (21) is h, wherein 2d≤s≤ 4d,1.5s≤h≤3s.

6. The oil fume purification system according to claim 1, characterized in that: The diameter of the electrode (26) is d, wherein 0.5 mm < d < 1.3 mm.

7. The oil fume purification system according to claim 1, characterized in that: The pitch of the electrode (26) is s, where s=4 mm.

8. The oil fume purification system according to claim 1, characterized in that: The difference between the inner diameter and the outer diameter of the annular cavity (21) is h, wherein h≥8 mm.

9. The oil fume purification system according to claim 1, characterized in that: It also includes a power supply device, which is connected to the cathode (25) and the anode (24) respectively through external wires (28).

10. The oil fume purification system according to claim 4, characterized in that: Both end surfaces of the annular cavity (21) are sealed.

11. The oil fume purification system according to claim 4, characterized in that: The vertical distance between the two end surfaces of the annular cavity (21) is H, wherein 50 mm ≤ H ≤ 150 mm.

12. The oil fume purification system according to claim 1, characterized in that: An insulating medium (27) is introduced into the annular cavity (21), and the insulating medium (27) is an insulating gas or an insulating liquid.

13. The oil fume purification system according to claim 1, characterized in that: The first annular inner wall (221) has a connecting portion, which can be opened and closed in a controlled manner, and is used to connect the plasma in the annular cavity (21) and the oil smoke in the smoke pipe body (1).

14. A range hood, comprising a machine body and the oil fume purification system according to any one of claims 1 to 13, wherein the machine body is connected to an end of the smoke pipe body (1) away from the plasma generating device (2).

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