Cooking fume catalytic oxidation purification device

Abstract

The utility model discloses a catalytic oxidation purification device for cooking fume, which comprises a casing, a smoke inlet and an air outlet are arranged at the bottom of the casing, and an accommodating space is arranged in the casing; the purification structure is arranged in the accommodating space and is positioned above the smoke inlet; the multiple fans are arranged between the purification structure and the side wall of the machine shell, air inlets of the fans face the containing space, air outlets of the fans face the exhaust outlet of the machine shell, and therefore under the action of the fans, relatively clean smoke obtained through treatment of the purification structure flows out of the exhaust outlet to form an air curtain on the side portion of the machine shell; and the high-temperature-resistant plate body is detachably arranged on the machine shell so as to buffer the flue gas. Smoke obtained through purification forms a gas curtain, self-circulation of the smoke is achieved, a flue does not need to be installed, meanwhile, the high-temperature-resistant plate body can buffer the smoke, and the service life of the draught fan is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of household electrical appliances, in particular to a cooking fume catalytic oxidation purification device. Background Art

[0002] In the early days, exhaust fans were used to exhaust kitchen fumes. Although exhaust fans can remove most of the fumes in the kitchen, they cannot solve the pollution of the kitchen caused by fumes produced during cooking and the harm of fumes containing many harmful substances to the human body. With the emergence of range hoods, the main function of range hoods is to remove solid particles and some harmful gases in the fumes through ventilation and filtration, thereby reducing the impact on indoor air quality. Particles and some harmful gases in the fumes, such as smoke, grease particles, etc., can be captured and adsorbed by the filter, thereby reducing direct harm to the human body. In order to reduce the escape of oil fume, installing an air curtain device is also one of the common methods currently used, but the installation of air curtain devices has the following problems: high price. Since the equipment price of the air curtain device itself is relatively high, installing an air curtain device will greatly increase the equipment cost; complex installation. The air curtain needs to be installed above the kitchen exit, which requires a suitable location and space, and requires professional personnel to install and debug; excessive energy consumption. In order to achieve a better oil fume emission effect, the exhaust volume of the range hood and the air volume of the air curtain device need to match each other. If the amount of smoke is large and the air curtain volume is small, the air curtain effect will be poor. In order to achieve a balance between the amount of smoke and the amount of air curtain to make the air curtain effect better, the energy consumption of the air curtain device will be too large.

[0003] In addition, existing range hoods usually use a flue connected to the range hood exhaust port to exhaust oil smoke out of the kitchen, but when installing this type of range hood, it is often necessary to remove the cabinet, the installation process is complicated, and during use, oil stains will adhere to the flue, increasing the cleaning cost, and the exhaust method of the flue is prone to cause smoke backflow. In addition, there are problems such as high noise.

[0004] In addition, when the existing range hood uses a fan to extract oil smoke, the oil smoke enters the range hood through the smoke inlet and directly enters the fan, which easily causes oil smoke accumulation at the fan inlet. A large amount of gas directly enters the fan from the fan inlet, which easily causes fan wear and even makes it unable to rotate, affecting the service life of the fan.

[0005] In view of this, it is necessary to design a cooking fume catalytic oxidation purification device to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a cooking fume catalytic oxidation purification device which uses the smoke obtained by purification structure as the air flow source of the fan to form an air curtain, utilizes the self-circulation of the smoke, does not need to install a flue, and at the same time arranges a high-temperature resistant plate on the top of the casing to buffer the smoke and adhere the residual oil carried in the smoke to better achieve the separation of the smoke and the residual oil, avoids the smoke carrying the residual oil directly entering the fan to cause the accumulation of oil and loss of the fan, and effectively extends the service life of the fan, has a light and thin body and is low-cost.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A cooking fume catalytic oxidation purification device, comprising:

[0009] A casing, wherein a smoke inlet and an air outlet are arranged at the bottom of the casing, and a receiving space is arranged inside the casing;

[0010] The purification structure is arranged in the accommodation space and located on the smoke inlet, and is used to purify the oil smoke entering the interior of the housing through the smoke inlet;

[0011] A high temperature resistant plate body is detachably arranged on the casing above the purification structure to buffer the smoke; and

[0012] A plurality of fans are respectively arranged between the purification structure and the side wall of the casing, the air inlet of the fan is configured between the purification structure and the high temperature resistant plate body, and the air outlet is connected with the exhaust port at the bottom of the casing. The fan draws the oil fume purified by the purification structure through the air inlet and discharges it through the exhaust port, forming an air curtain on both sides of the smoke inlet.

[0013] As a further improvement of the present invention, the high temperature resistant plate body is a microcrystalline glass plate, the microcrystalline glass plate is a translucent structure, and is arranged on the top of the casing facing the purification structure.

[0014] As a further improvement of the present invention, two fans are provided, and the two fans are symmetrically arranged on both sides of the purification structure.

[0015] As a further improvement of the present invention, the vertical distance between the microcrystalline glass plate and the purification structure is 6-10 cm.

[0016] As a further improvement of the utility model, the purification structure includes a catalytic layer for catalytically oxidizing and decomposing the oil smoke and a fixing component for fixing the catalytic layer on the casing.

[0017] As a further improvement of the present invention, the catalytic layer is provided with multiple layers.

[0018] As a further improvement of the present invention, the fixing component is a grid plate.

[0019] As a further improvement of the present invention, along the vertical direction, the area of ​​the microcrystalline glass plate is greater than or equal to the area of ​​the catalyst layer.

[0020] As a further improvement of the utility model, a start / stop button for controlling the start / stop of the fan and an air volume control button for controlling the air volume of the fan are arranged on the side of the casing facing the user.

[0021] As a further improvement of the present utility model, the smoke inlet is located in the middle of the bottom of the casing, and the two air outlets are respectively located on the left and right sides of the bottom of the casing.

[0022] The beneficial effects of the utility model are:

[0023] 1. The utility model installs a purification structure for purifying oil fume at the smoke inlet of the range hood, and installs fans for changing the flow path of the smoke inside the range hood on both sides of the range hood, so that the oil fume enters from the smoke inlet and is processed by the purification structure, and then flows into the fan air inlet to the left and right respectively and is blown out to the two sides of the range hood through the fan air outlet and the exhaust port in sequence to form an air curtain, which can limit the oil fume generated by cooking within a certain range and reduce the escape of oil fume; at the same time, compared with the prior art that discharges the smoke directly or after filtering into the environment, the utility model uses all the smoke generated by cooking after purification as an air curtain, which can make full use of the smoke flow rate itself and effectively reduce the energy consumption of the equipment.

[0024] 2. The utility model uses a fan to adjust the smoke path and blows the smoke out through the fan to form an air curtain. Compared with the traditional range hood equipped with an air curtain device, the range hood of the utility model does not need to be additionally provided with a fan for forming an air curtain, which can effectively reduce the energy consumption of the equipment. At the same time, since the independent fan for forming the air curtain is cancelled, the noise generated when the equipment is running can also be greatly reduced; in addition, the fan is used to suck the oil smoke and form the air curtain at the same time, so that the exhaust volume of the range hood, that is, the amount of oil smoke sucked and processed, and the air volume of the air curtain structure can match each other. The larger the exhaust volume, the larger the air volume of the air curtain, the faster the speed, and the better the smoke binding effect; therefore, the air curtain volume of the utility model has an adaptive adjustment function, and the situation in the prior art that the air curtain device and the oil smoke exhaust are independent of each other (additional control equipment and sensors are required), and the air curtain energy consumption needs to be increased to balance the amount of smoke and the air curtain volume to ensure the air curtain effect will not occur. That is, the range hood of the utility model can effectively save energy consumption while making full use of the smoke energy.

[0025] 3. The utility model can balance the range hood by arranging the fans on both sides of the purification structure, so that the overall force of the range hood is balanced, and can significantly reduce the height of the range hood body, so that the range hood has the characteristics of lightness and thinness, while also ensuring the uniformity of the oil smoke passing through the purification structure.

[0026] 4. The range hood of the utility model adopts the method of internal circulation of smoke, and there is no need to install a flue, and it will not cause damage to walls, cabinets, etc. It can be directly hung on the wall, or set up on the desktop, or suspended for use during installation. It is easy to install, and when the position of the range hood needs to be changed when moving or renovating, it can be directly dismantled, which is more convenient to use.

[0027] 5. The flue gas path is adjusted by the fan, and a high-temperature resistant plate is detachably arranged on the top of the casing, so that the high-temperature resistant plate can be used to buffer the flue gas purified by the purification structure; since the high-temperature resistant plate has the characteristics of high temperature resistance and is farther away from the purification structure than the smoke inlet, the temperature of the high-temperature resistant plate is lower than that of the purification structure. When the flue gas purified by the purification structure collides upward with the high-temperature resistant plate, it will stay on the high-temperature resistant plate, so that the residual oil carried in the flue gas adheres to the high-temperature resistant plate, thereby preventing the flue gas carrying the residual oil from directly entering the fan, causing oil accumulation and loss of the fan, or even the problem of being unable to rotate, thereby effectively extending the service life of the fan; in addition, since the fan cannot be disassembled for maintenance, the buffering and adsorption effects of the high-temperature resistant plate can greatly improve the overall service life of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the cooking fume catalytic oxidation purification device of the present invention.

[0029] Figure 2 This is a schematic diagram of the explosion structure of the cooking fume catalytic oxidation purification device.

[0030] Figure 3 This is a cross-sectional view of a cooking fume catalytic oxidation purification device.

[0031] Reference numerals

[0032] 10. Casing; 11. Smoke inlet; 12. Exhaust outlet; 20. Cross-flow fan; 21. Air inlet; 22. Air outlet; 23. Start / stop button; 24. Air volume control button; 311. Upper catalytic plate; 312. Lower catalytic plate; 321. Upper grid plate; 322. Lower grid plate; 40. Socket; 50. Microcrystalline glass plate. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0035] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0036] See also Figure 1-Figure 3 As shown, the utility model provides a cooking fume catalytic oxidation purification device, comprising:

[0037] A housing 10, wherein a smoke inlet 11 and exhaust ports 12 located on both sides of the smoke inlet 11 are provided at the bottom of the housing 10, and a receiving space is provided inside the housing;

[0038] The purification structure is arranged in the accommodation space and above the smoke inlet 11, and is used to purify the oil smoke entering the interior of the housing 10 through the smoke inlet 11;

[0039] A high temperature resistant plate body is detachably arranged on the casing above the purification structure to buffer the smoke; and

[0040] Fans, several fans are respectively arranged between the purification structure and the side walls of the casing 10, the air inlet 21 of the fan is configured between the purification structure and the high temperature resistant plate, and the air outlet 22 is connected to the exhaust port 12 at the bottom of the casing 10. The fan draws the oil fume purified by the purification structure through the air inlet 21 and discharges it through the exhaust port 12, forming an air curtain on both sides of the smoke inlet 11.

[0041] Specifically, the smoke inlet 11 is located in the middle of the bottom of the casing 10 , and the two air outlets 12 are respectively located on the left and right sides of the bottom of the casing 10 .

[0042] In some embodiments, Figure 3As shown, the fan is a cross-flow fan 20 and two of them are provided. The two cross-flow fans 20 are symmetrically arranged on both sides of the purification structure and are respectively close to the side walls of the casing 10. The oil smoke enters the casing 10 through the smoke inlet 11 and is processed by the purification structure to form relatively clean smoke. Under the action of the cross-flow fan 20, the smoke flows into the cross-flow fan 20 through the air inlet 21 to the left and right respectively, and is discharged to the outside of the range hood through the air outlet 22 and the exhaust port 12 in turn, and air curtains are formed on both sides of the smoke inlet 11 of the range hood, so that the oil smoke generated by cooking can be limited to a certain range by using the air curtain, reducing the escape of oil smoke and realizing the self-circulation of cooking oil smoke, so that the range hood does not need to use a flue to discharge the smoke out of the kitchen. This kind of flue-free design is conducive to the installation and disassembly of the range hood, and because the gas source of the air curtain is the purified smoke, the air curtain has a larger gas volume, better effect, and lower energy consumption. In addition, in the prior art, the air inlet 21 of the fan is often the place where the most oil smoke accumulates and the negative pressure is the heaviest. The utility model symmetrically arranges the cross-flow fan 20 on both sides of the purification structure, which can not only balance the range hood, balance the overall force of the range hood, and significantly reduce the height of the range hood body, so that the range hood has the characteristics of lightness and thinness, but also ensure the uniformity of the oil smoke passing through the purification structure; for example, the size of a conventional range hood is generally 900*500*700mm, while the size of the range hood of the utility model can be set to 600*460*102mm, and the space it occupies is significantly smaller. In addition, since the oil smoke has been purified by the purification structure when it enters the interior of the housing 10, the oil smoke accumulation at the air inlet 21 of the cross-flow fan 20 can be significantly improved, thereby effectively increasing the service life of the cross-flow fan 20.

[0043] For example, in the utility model, the size of the smoke inlet 11 of the range hood is 285*285mm, the size of the air inlet 21 of the crossflow fan 20 is 310*98mm, and the size of the air outlet 22 is 310*30mm. The total area of ​​the two air outlets 22 is significantly lower than the setting of the smoke inlet 11, so that under the action of the crossflow fan 20, an air curtain with a large flow rate can be formed at the exhaust port 12 of the range hood. The setting of the crossflow fan 20 to simultaneously suck the smoke and form the air curtain, in addition to allowing the air curtain flow rate to be adaptively adjusted according to the suction flow rate, also makes it unnecessary to specially set a fan for forming the air curtain. Compared with the prior art that forms the air curtain by sucking and exhausting air from the air through the air curtain fan, it can fully utilize the smoke energy while effectively reducing the energy consumption of the air curtain fan part. In addition, since the range hood of the utility model does not need to be provided with an air curtain fan, the noise generated by the range hood during operation can also be relatively reduced, thereby providing a relatively comfortable operating environment for the user.

[0044] Specifically, the oil fume purification technology itself can adopt the structure in the prior art, such as the technology disclosed in CN101406787A, etc. The fixed component is a mesh plate, and the mesh size of the mesh plate is determined according to the purification effect and the application scenario.

[0045] Exemplarily, the purification structure adopts a catalytic oxidation method, including a catalytic layer for catalytically oxidizing and decomposing the oil smoke and a fixing component for fixing the catalytic layer on the casing 10. In some embodiments, the catalytic layer can be arranged in multiple layers. In this embodiment, the catalytic layer includes an upper catalytic plate 311 and a lower catalytic plate 312 arranged at intervals in the vertical direction; by setting two layers of catalytic plates, the catalyst in the lower catalytic plate 312 can perform preliminary catalytic oxidation and decomposition of the heavy oil smoke, and then use the catalyst in the upper catalytic plate 311 to perform catalytic oxidation and decomposition again, so as to fully purify the oil smoke.

[0046] In some embodiments, the fixing assembly includes a lower grid plate 322 located below the lower catalytic plate 312 and an upper grid plate 321 located above the upper catalytic plate 311, and the lower grid plate 322 and the upper grid plate 321 are both provided with a plurality of holes, and the aperture of the holes of the lower grid plate 322 is larger than the aperture of the holes of the upper grid plate 321. Exemplarily, the aperture of the holes on the lower grid plate 322 is 65*75mm, and the aperture of the holes on the upper grid plate 321 is 67.5*70mm. By making the aperture of the lower grid plate 322 larger than that of the upper grid plate 321, it is possible to facilitate the passage of heavy components of oil smoke while preventing the heavy oil smoke from adhering to the holes of the grid plate 322 under the catalyst, thereby avoiding the problem of increased smoking resistance due to blockage of the holes of the solid plate under the catalyst; the oil smoke is decomposed through catalytic oxidation, and the heavy components of the oil smoke are converted into light components. By making the aperture of the upper grid plate 321 smaller than that of the lower grid plate 322, the escape rate of the light components can be slowed down while the diffusion rate of the light component molecules is guaranteed.

[0047] Specifically, the size of the purification structure is larger than the size of the smoke inlet 11, so that the oil smoke entering the inside of the casing 10 through the smoke inlet 11 can be purified by the purification structure. Exemplarily, the plane size of the catalytic plate is 300*300mm.

[0048] Specifically, in the present embodiment, the high temperature resistant plate body is a translucent microcrystalline glass plate 50, and is arranged on the top of the casing 10 directly opposite to the purification structure. At the same time, along the vertical direction, the area of ​​the microcrystalline glass plate 50 is greater than or equal to the area of ​​the catalytic plate. Exemplarily, the area of ​​the microcrystalline glass plate 50 is 300*300mm. By detachably arranging the microcrystalline glass plate 50 on the top of the casing 10, the microcrystalline glass plate 50 can be used to buffer the flue gas purified by the purification structure, so that the oil smoke enters the range hood along the vertical direction and the flue gas formed after being purified by the purification structure collides upward with the microcrystalline glass plate 50, and then flows to the left and right respectively under the action of the cross-flow fan 20, so as to avoid a large amount of purified flue gas directly flowing to the air inlet 21 of the cross-flow fan 20, resulting in the loss of the cross-flow fan or even the inability to rotate. At the same time, the flue gas purified by the purification structure may carry some residual oil. Due to the microcrystalline glass plate 50 The temperature is lower than that of the purification structure. When the flue gas purified by the purification structure collides upwards with the microcrystalline glass plate 50, it will stay on the microcrystalline glass plate 50, so that the residual oil carried in the flue gas adheres to the microcrystalline glass plate 50, thereby preventing the flue gas carrying the residual oil from directly entering the cross-flow fan 20, causing the accumulation of oil smoke at the air inlet 21 of the cross-flow fan 20, affecting its use effect; wherein, the vertical distance between the microcrystalline glass plate 50 and the purification structure needs to be controlled to be 6-10cm, so as to avoid the microcrystalline glass plate 50 buffering the flue gas and the residual oil adhesion effect due to the distance being too short or too long. Since the cross-flow fan 20 cannot be disassembled for maintenance, the buffering and oil adsorption effects of the microcrystalline glass plate 50 can greatly increase the overall service life of the range hood.

[0049] In addition, the semi-transparent setting of the micro-ceramic plate 50 is convenient for the user to observe the catalytic effect of the catalyst, check the blockage of the upper catalytic plate 311, and the oil adhesion on the micro-ceramic plate 50; the detachable setting of the micro-ceramic plate 50 is convenient for cleaning the micro-ceramic plate 50 as needed, and is also convenient for replacing the catalytic plate and performing daily maintenance of the catalytic plate. In addition, in actual applications, the residual heat on the micro-ceramic plate 50 when using the range hood can also be used to keep the cooked dishes warm.

[0050] For example, Figure 1 As shown, a start / stop button 23 of a cross flow fan 20 and an air volume control button 24 of the cross flow fan 20 are provided on the side of the casing 10 facing the user. The start / stop button 23 is used to control the start of the cross flow fan 20, and the air volume control button 24 is used to control the rotation speed of the cross flow fan 20 to control the effect of the air curtain. A socket 40 for circuit connection is also provided on the side of the casing 10.

[0051] Specifically, the housing 10 can be made of aluminum alloy, cold plate spraying or stainless steel.

[0052] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A cooking fume catalytic oxidation purification device, characterized in that: include: A casing, wherein a smoke inlet and an air outlet are arranged at the bottom of the casing, and a receiving space is arranged inside the casing; The purification structure is arranged in the accommodation space and located on the smoke inlet, and is used to purify the oil smoke entering the interior of the housing through the smoke inlet; A high temperature resistant plate body is detachably arranged on the casing above the purification structure to buffer the smoke; and A plurality of fans are respectively arranged between the purification structure and the side wall of the casing, the air inlet of the fan is configured between the purification structure and the high temperature resistant plate body, and the air outlet is connected with the exhaust port at the bottom of the casing. The fan draws the oil fume purified by the purification structure through the air inlet and discharges it through the exhaust port, forming an air curtain on both sides of the smoke inlet.

2. The cooking fume catalytic oxidation purification device according to claim 1, characterized in that: The high temperature resistant plate body is a microcrystalline glass plate, the microcrystalline glass plate is a translucent structure, and is arranged on the top of the casing facing the purification structure.

3. The cooking fume catalytic oxidation purification device according to claim 2, characterized in that: There are two fans, which are symmetrically arranged on both sides of the purification structure.

4. The cooking fume catalytic oxidation purification device according to claim 3 is characterized in that: The vertical distance between the microcrystalline glass plate and the purification structure is 6-10 cm.

5. The cooking fume catalytic oxidation purification device according to claim 2, characterized in that: The purification structure comprises a catalytic layer for catalytically oxidizing and decomposing oil smoke and a fixing component for fixing the catalytic layer on the casing.

6. The cooking fume catalytic oxidation purification device according to claim 5, characterized in that: The catalytic layer is provided with multiple layers.

7. The cooking fume catalytic oxidation purification device according to claim 6, characterized in that: The fixing component is a grid plate.

8. The cooking fume catalytic oxidation purification device according to claim 5, characterized in that: Along the vertical direction, the area of ​​the microcrystalline glass plate is greater than or equal to the area of ​​the catalytic layer.

9. The cooking fume catalytic oxidation purification device according to claim 1, characterized in that: The side of the housing facing the user is provided with a start / stop button for controlling the start / stop of the fan and an air volume control button for controlling the air volume of the fan.

10. The cooking fume catalytic oxidation purification device according to claim 1, characterized in that: The smoke inlet is located in the middle of the bottom of the casing, and the two air outlets are respectively located on the left and right sides of the bottom of the casing.

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