Waste gas treatment system and kitchen electric appliance

Abstract

The utility model provides a waste gas treatment system and kitchen electric appliance relates to oven technical field, the waste gas treatment system includes the catalytic chamber and filter chamber intercommunication, the one side of catalytic chamber is provided with the air inlet, the one side of filter chamber is provided with the air outlet, is provided with the air inducing structure between catalytic chamber and filter chamber. A catalytic converter is arranged in the catalytic cavity, and an air outlet pipe communicated with the water mist generator is arranged in the filtering cavity. The waste gas treatment system can introduce waste gas through the air inducing structure and purify the waste gas through the catalyzing cavity and the filtering cavity, so that the cleanliness of the waste gas is improved, pollution of the waste gas to the environment is reduced, the waste gas treatment system can be used for waste gas treatment of the oven, and the waste gas generated by the oven is prevented from polluting the family environment; therefore, the use experience of the user can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ovens, in particular to an exhaust gas treatment system and a kitchen appliance. Background Art

[0002] As a common cooking device in modern kitchens, ovens bring great convenience to people's daily lives. However, during the baking process, the exhaust gas generated by food ingredients and heating elements often contains cooking fumes, carbon monoxide, volatile organic compounds (VOCs), and other potential harmful substances. If these exhaust gases are directly discharged into the indoor environment without proper treatment, they will not only cause air pollution but also pose a threat to the health of family members. Currently, most ovens on the market do not come with a dedicated exhaust gas treatment system. They usually only discharge the exhaust gas outside the oven through a simple exhaust port, lacking the filtration and purification of harmful substances in the exhaust gas. This design makes the oven an important source of indoor air pollution in the family.

[0003] Therefore, it is necessary to improve the structure of existing ovens to overcome the defects of the prior art. Summary of the Utility Model

[0004] To overcome the problems existing in the related art, one of the purposes of the present utility model is to provide an exhaust gas treatment system, which can introduce the exhaust gas through an air guiding structure and purify the exhaust gas through a catalytic chamber and a filtration chamber, thereby improving the cleanliness of the exhaust gas and reducing the environmental pollution caused by the exhaust gas. This exhaust gas treatment system can be used for the exhaust gas treatment of ovens, avoiding the pollution of the home environment caused by the exhaust gas generated by the ovens, and thus improving the user experience.

[0005] An exhaust gas treatment system includes:

[0006] A catalytic chamber and a filtration chamber that are interconnected. An air inlet is provided on one side of the catalytic chamber, and an air outlet is provided on one side of the filtration chamber. An air guiding structure is provided between the catalytic chamber and the filtration chamber;

[0007] A catalytic converter is provided in the catalytic chamber, and an air outlet pipe connected to a water mist generator is provided in the filtration chamber.

[0008] In a preferred technical solution of the present utility model, the catalytic converter includes a catalytic housing, an air inlet and an air outlet are provided on the catalytic housing, a carrier is provided in the catalytic housing, a catalytic medium is provided on the carrier, and a gasket is further provided between the catalytic housing and the carrier.

[0009] In a preferred technical solution of the present utility model, the catalytic medium is any one of a noble metal catalyst, a transition metal oxide catalyst, or a composite catalyst.

[0010] In a preferred technical solution of the present utility model, the filtration chamber is arranged on one side of the catalytic chamber, the top of the filtration chamber is communicated with the catalytic chamber, the water mist generator is arranged at the bottom of the filtration chamber, and the air outlet is arranged at the bottom of the filtration chamber;

[0011] A tail filter is arranged on one side of the air outlet, the tail filter is provided with a filtration inlet and a filtration outlet, and the filtration outlet is communicated with the air outlet.

[0012] In a preferred technical solution of the present utility model, a plurality of partition plates are arranged in the filtration chamber, and the plurality of partition plates are arranged in parallel; one end of each partition plate is fixed on the inner wall of the filtration chamber, and an air passing opening is formed between the opposite end and the inner wall of the filtration chamber, and along the height direction of the filtration chamber, adjacent two of the air passing openings are staggered from each other.

[0013] In a preferred technical solution of the present utility model, the water mist generator includes a generator main body, a water tank is arranged in the generator main body, an ultrasonic transducer is arranged in the water tank, a nozzle is arranged above the water tank, the nozzle is communicated with the air outlet pipe, and a water mist outlet is arranged on the air outlet pipe.

[0014] In a preferred technical solution of the present utility model, a liquid level sensor is arranged in the water tank, there are two liquid level sensors, and the two liquid level sensors are respectively arranged near the top and the bottom of the water tank, and the distance between the liquid level sensor near the bottom of the water tank and the bottom of the water tank is greater than 10 cm.

[0015] The second object of the present utility model is to provide a kitchen appliance, which includes an appliance main body, and the above-mentioned waste gas treatment system is arranged on the appliance main body.

[0016] In a preferred technical solution of the present utility model, the appliance main body includes an inner shell, an outer shell and a door panel, the outer shell is wrapped around the outer periphery of the inner shell, a cooking chamber is arranged in the inner shell, the door panel is arranged on one side of the cooking chamber, and heat pipes are arranged at the top and the bottom of the cooking chamber;

[0017] One side of the top of the cooking chamber is provided with the catalytic chamber.

[0018] The beneficial effects of the present utility model are:

[0019] An exhaust gas treatment system provided by the utility model includes a catalytic chamber and a filtration chamber that are interconnected. An air inlet is provided on one side of the catalytic chamber, and an air outlet is provided on one side of the filtration chamber. An air guiding structure is provided between the catalytic chamber and the filtration chamber. A catalytic converter is provided in the catalytic chamber, and an air outlet pipe communicated with a water mist generator is provided in the filtration chamber. This system can be used in an oven to purify the exhaust gas generated by the oven. The catalytic converter can effectively decompose and catalyze harmful substances in the exhaust gas. A water mist generator is provided in the filtration chamber, which can generate fine water mist to further adsorb and filter particles and harmful substances in the exhaust gas. During use, the exhaust gas generated by the oven enters the catalytic chamber through the air inlet, and the catalytic converter preliminarily catalyzes and decomposes the exhaust gas, converting harmful substances into harmless or less harmful substances. The exhaust gas after catalytic treatment enters the filtration chamber through the air guiding structure, and the water mist generated by the water mist generator performs secondary filtration on the exhaust gas to further remove particles and residual harmful substances. The purified exhaust gas is discharged through the air outlet, meeting the emission standards and reducing the pollution to the household environment. This exhaust gas treatment system is applicable to household appliances such as ovens, can effectively solve the problem of exhaust gas emission, and improve the user experience and quality of life.

[0020] The present application also provides a kitchen appliance including the above exhaust gas treatment system. During use, the appliance can purify the exhaust gas, thereby reducing the impact of the exhaust gas on the household environment and avoiding the exhaust gas from affecting the user's physical health. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the exhaust gas treatment system provided in the embodiment of the present application;

[0022] Figure 2 It is a schematic structural diagram of the catalytic converter provided in the embodiment of the present application;

[0023] Figure 3 It is a schematic structural diagram of the water mist generator provided in the embodiment of the present application;

[0024] Figure 4 It is a schematic structural diagram of the exhaust gas treatment system provided in the embodiment of the present application when arranged on a kitchen appliance;

[0025] Figure 5 is Figure 4 a partial enlarged view of part A in;

[0026] Figure 6 It is a perspective view of the kitchen appliance provided in the embodiment of the present application;

[0027] Figure 7 It is a flowchart of the usage method of the kitchen appliance provided in the embodiment of the present application.

[0028] Reference Signs:

[0029] 1. Catalytic chamber; 11. Air inlet; 2. Air guiding structure; 3. Filter chamber; 31. Partition board; 32. Air passing port; 33. Air outlet; 4. Catalytic converter; 41. Catalytic housing; 411. Air inlet; 412. Air outlet; 42. Carrier; 43. Gasket; 5. Outlet pipe; 51. Water mist outlet; 6. Tail filter; 7. Water mist generator; 71. Water tank; 72. Ultrasonic transducer; 73. Liquid level sensor; 74. Nozzle; 100. Inner shell; 200. Outer shell; 300. Door panel; 400. Cooking chamber; 500. Heat pipe. Detailed implementation mode

[0030] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art. d

[0031] The terms used in the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the present invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0032] It should be understood that although the terms "first", "second", "third", etc. may be used in the present invention to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0033] As a common cooking appliance in modern kitchens, ovens bring great convenience to people's daily lives. However, during the baking process, the exhaust gases generated by food ingredients and heating elements often contain cooking fumes, carbon monoxide, volatile organic compounds (VOCs), and other potential harmful substances. If these exhaust gases are directly discharged into the indoor environment without proper treatment, they will not only cause air pollution but also pose a threat to the health of family members. Currently, most ovens on the market do not come with a dedicated exhaust gas treatment system. They usually only exhaust the exhaust gases outside the oven through a simple exhaust port, lacking the filtration and purification of harmful substances in the exhaust gases. This design makes the oven an important source of indoor air pollution in the home.

[0034] Based on this, the present application provides an exhaust gas treatment system for treating the exhaust gases generated by an oven.

[0035] Embodiment 1

[0036] As Figures 1-6 shown, this embodiment provides an exhaust gas treatment system, comprising:

[0037] A catalytic chamber 1 and a filtration chamber 3 that are interconnected. An air inlet 11 is provided on one side of the catalytic chamber 1, and an air outlet 33 is provided on one side of the filtration chamber 3. An air guiding structure 2 is provided between the catalytic chamber 1 and the filtration chamber 3;

[0038] A catalytic converter 4 is provided in the catalytic chamber 1, and an air outlet pipe 5 communicated with a water mist generator 7 is provided in the filtration chamber 3.

[0039] The catalytic chamber 1 is provided with an air inlet 11 for receiving the exhaust gases discharged from the oven. A catalytic converter 4 is provided in the catalytic chamber 1. This catalytic converter 4 can use a high-efficiency catalyst to effectively decompose the harmful substances in the exhaust gases or catalyze the harmful gases in the exhaust gases into harmless gases. For example, carbon monoxide is catalyzed into carbon dioxide. The filtration chamber 3 is communicated with the catalytic chamber 1. The filtration chamber 3 is provided with an air outlet 33 for discharging the exhaust gases that have undergone purification treatment. A water mist generator 7 is provided in the filtration chamber 3, which can generate fine water mist and further adsorb and filter the particles and harmful substances in the exhaust gases by using the water mist.

[0040] The above-mentioned waste gas treatment system, during use, the waste gas generated by the oven enters the catalytic chamber 1 through the air inlet 11, and the catalytic converter 4 preliminarily catalytically decomposes the waste gas, converting harmful substances into harmless or less harmful substances. The waste gas after catalytic treatment enters the filtration chamber 3 through the air induction structure 2, and the water mist generated by the water mist generator 7 performs secondary filtration on the waste gas to further remove particles and residual harmful substances. The purified waste gas is discharged through the air outlet 33, meeting the emission standards and reducing the pollution to the household environment. Through the dual purification effects of the catalytic chamber 1 and the filtration chamber 3, the utility model can significantly improve the cleanliness of the waste gas and effectively remove harmful substances and particles in the waste gas. The purified waste gas meets the emission standards, significantly reducing the pollution to the household environment and protecting the health of users. This waste gas treatment system is applicable to household appliances such as ovens, can effectively solve the problem of waste gas emissions, and improve the user experience and quality of life. The combined use of the catalytic converter 4 and the water mist generator 7 realizes the efficient purification of waste gas. At the same time, the system has a simple structure and low operating cost, and has high practical value.

[0041] Specifically, the catalytic converter 4 includes a catalytic housing 41, an air inlet 411 and an air outlet 412 are provided on the catalytic housing 41, a carrier 42 is provided in the catalytic housing 41, a catalytic medium is provided on the carrier 42, and a gasket 43 is further provided between the catalytic housing 41 and the carrier 42.

[0042] Specifically, the air inlet 411 on the catalytic housing 41 is communicated with the air inlet 11 of the catalytic chamber 1.

[0043] Further, the catalytic medium is any one of a noble metal catalyst, a transition metal oxide catalyst or a composite catalyst.

[0044] The catalytic housing 41 serves as the external structure of the catalytic converter 4 and is used to fix and support the internal components. The air inlet 411 and the air outlet 412 are provided on the catalytic housing 41, which are respectively used to receive the waste gas and discharge the waste gas after catalytic treatment. The carrier 42 is located inside the catalytic housing 41 and is used to carry the catalytic medium. The carrier 42 has a porous structure, providing a large surface area to increase the contact area between the catalytic medium and the waste gas and improve the catalytic efficiency.

[0045] The gasket 43 is provided between the catalytic housing 41 and the carrier 42 and is used to seal and support the carrier 42 to ensure that the waste gas can smoothly pass through the catalytic converter 4 and undergo effective catalytic treatment.

[0046] The noble metal catalyst can be any one of platinum (Pt) and palladium (Pd), and these catalysts have high activity and stability.

[0047] The transition metal oxide catalyst can be any one of copper oxide (CuO) or manganese oxide (MnO2), and more preferably, the transition metal oxide catalyst is copper oxide. Copper oxide has good catalytic performance and can promote the oxidation reaction of carbon monoxide, so that carbon monoxide gas can be catalyzed into carbon dioxide after passing through the catalyst 4.

[0048] The composite catalyst can be a copper-zinc-aluminum catalyst (CuO-ZnO-Al2O3), which combines the advantages of multiple components and has higher catalytic activity and selectivity.

[0049] In a more specific embodiment, the filter chamber 3 is arranged on one side of the catalytic chamber 1, the top of the filter chamber 3 is connected to the catalytic chamber 1, the water mist generator 7 is arranged at the bottom of the filter chamber 3, and the exhaust port 33 is arranged at the bottom of the filter chamber 3. In a more preferred embodiment, a tail filter 6 is also connected to one side of the exhaust port 33, and the tail filter 6 is used to perform secondary filtration on the gas passing through the filter chamber 3 to ensure the cleanliness of the waste treatment.

[0050] The filter chamber 3 is arranged adjacent to one side of the catalytic chamber 1, and the top is connected to the catalytic chamber 1, forming a smooth exhaust gas flow path. After the exhaust gas enters from the top, it flows to the bottom of the filter chamber 3, and is discharged from the exhaust port 33 after being filtered. During operation, the exhaust gas first enters the catalytic chamber 1 through the air inlet 11, and the harmful substances in the exhaust gas are decomposed under the action of the catalyst 4. The decomposed exhaust gas naturally flows into the filter chamber 3 through the connecting part between the catalytic chamber 1 and the filter chamber 3. In the filter chamber 3, the water mist generated by the water mist generator 7 is in full contact with the exhaust gas, further removing the particles and residual harmful substances in the exhaust gas. Finally, the exhaust gas that has undergone double purification is discharged through the exhaust port 33, meeting environmental protection standards.

[0051] Furthermore, a plurality of partitions 31 are provided in the filter chamber 3, and the plurality of partitions 31 are arranged parallel to each other; one end of each of the partitions 31 is fixed to the inner wall of the filter chamber 3, and an air outlet 32 ​​is formed between the other opposite end and the inner wall of the filter chamber 3, and along the height direction of the filter chamber 3, two adjacent air outlets 32 are staggered with each other.

[0052] In this embodiment, the design of the partition plate 31 and the air outlet 32 ​​allows the exhaust gas to form a tortuous flow path in the filter chamber 3, thereby increasing the contact time and contact area between the exhaust gas and the water mist and improving the purification efficiency. The tortuous flow path makes the exhaust gas more evenly distributed in the filter chamber 3, avoiding the situation where the exhaust gas concentration in a local area is too high or too low, thereby optimizing the exhaust gas treatment effect.

[0053] In addition, due to the improved contact efficiency between the exhaust gas and the water mist, the energy consumption required for exhaust gas treatment is reduced. At the same time, the tortuous flow path also helps to reduce the accumulation and blockage of water mist in the filtration chamber 3, reducing the maintenance cost.

[0054] More specifically, the water mist generator 7 includes a generator main body, a water tank 71 is arranged in the generator main body, an ultrasonic transducer 72 is arranged in the water tank 71, a nozzle 74 is arranged above the water tank 71, the nozzle 74 is communicated with the air outlet pipe 5, and a water mist outlet 51 is arranged on the air outlet pipe 5.

[0055] The water tank 71 is used to store water and serves as a working medium for ultrasonic vibration. The ultrasonic transducer 72 is installed in the water tank 71 and atomizes water molecules into fine water mist through ultrasonic vibration. The nozzle 74 is arranged above the water tank 71 and is communicated with the water tank 71, and is used to spray the generated water mist, so that the water mist enters the air outlet pipe 5 and enters the filtration chamber 3 from the outlet of the air outlet pipe 5 to make full contact with the exhaust gas.

[0056] When the exhaust gas treatment system operates, the water in the water tank 71 is atomized into fine water mist by the ultrasonic transducer 72, the atomized water mist is sprayed out through the nozzle 74, enters the filtration chamber 3, and makes full contact and mixing with the exhaust gas; the tiny water droplets in the water mist adsorb the particles and harmful substances in the exhaust gas, realizing further purification of the exhaust gas.

[0057] Preferably, two liquid level sensors 73 are arranged in the water tank 71, and the two liquid level sensors 73 are respectively arranged close to the top and bottom of the water tank 71, and the distance between the liquid level sensor 73 close to the bottom of the water tank 71 and the bottom of the water tank 71 is greater than 10 cm.

[0058] The two liquid level sensors 73 monitor the water level change in the water tank 71 in real time and transmit signals to the control system. When the water level is too low, the liquid level sensor 73 close to the bottom of the water tank 71 sends a signal, and after receiving the signal, the control system starts the water replenishing device to replenish water into the water tank 71. When the water level is too high, the liquid level sensor 73 close to the top of the water tank 71 sends a signal, and after receiving the signal, the control system stops water replenishment to avoid overflow of the water tank 71. Through the real-time monitoring and control of the liquid level sensor 73, it can be ensured that the water level in the water tank 71 always remains within an appropriate range, avoiding abnormal operation of the water mist generator 7 due to too low or too high water level. Through the precise control of the liquid level sensor 73, energy consumption waste and equipment damage caused by too low or too high water level can be avoided, and the maintenance cost can be reduced.

[0059] Embodiment 2

[0060] As Figures 4-6As shown in the figure, this embodiment provides a kitchen appliance, including an appliance main body, on which the above-mentioned waste gas treatment system is provided. Further, the appliance main body includes an inner shell 100, an outer shell 200, and a door panel 300. The outer shell 200 is wrapped around the periphery of the inner shell 100. A cooking chamber 400 is provided in the inner shell 100. The door panel 300 is provided on one side of the cooking chamber 400. Heat pipes 500 are provided at both the top and bottom of the cooking chamber 400; a catalytic chamber 1 is provided on one side of the top of the cooking chamber 400.

[0061] The kitchen appliance can be an oven. The outer shell 200 is wrapped around the periphery of the inner shell 100, which can play a role in heat insulation and at the same time protect users from high temperature damage.

[0062] The waste gas generated during the cooking process of the oven is treated by the catalytic chamber 1 and the filtration chamber 3, effectively reducing waste gas emissions and improving the air quality of the home environment. The kitchen appliance provided in this application is not only applicable to the home environment, but also can be applied to places such as commercial kitchens that require treatment of cooking waste gas.

[0063] Embodiment 3

[0064] As Figure 7 shown in the figure, this application also provides a usage method of a kitchen appliance. This method is implemented based on the above-mentioned kitchen appliance, and the method includes:

[0065] S100. During the use process, detect the concentration of harmful substances inside the appliance main body, and judge whether the concentration of harmful substances exceeds a preset threshold;

[0066] During the use process, through the sensors or detection devices built in the kitchen appliance, the concentration of harmful substances inside the appliance main body is detected in real time. Compare the detected concentration of harmful substances with the preset threshold to judge whether the current concentration exceeds the safe range.

[0067] S200. When the concentration of harmful substances exceeds the preset threshold, start the air guiding structure 2.

[0068] When the detected concentration of harmful substances exceeds the preset threshold, it indicates that there may be a pollution risk in the current cooking environment. At this time, the air guiding structure 2 in the kitchen appliance is automatically started. The air guiding structure 2 can be a cross-flow fan or an exhaust device, and the waste gas inside the appliance main body is introduced into the waste gas treatment system for purification treatment.

[0069] This method realizes the real-time monitoring and control of the cooking environment by detecting the concentration of harmful substances in real time and automatically starting the air guiding structure 2 when the standard is exceeded, ensuring the health of users. This method realizes the intelligent management of the kitchen appliance, and the waste gas treatment process can be automatically completed without manual operation by the user, improving the convenience and safety of use.

[0070] The embodiments of the present utility model have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technologies in the market, or to enable other ordinary technical personnel in the technical field to understand the embodiments disclosed herein.

Claims

1. An exhaust gas treatment system, characterized in that: include: A catalytic chamber (1) and a filter chamber (3) that are interconnected, an air inlet (11) being provided on one side of the catalytic chamber (1), an air outlet (33) being provided on one side of the filter chamber (3), and an air induction structure (2) being provided between the catalytic chamber (1) and the filter chamber (3); The catalytic chamber (1) is provided with a catalytic converter (4), and the filter chamber (3) is provided with an air outlet pipe (5) connected to a water mist generator (7).

2. The exhaust gas treatment system according to claim 1, characterized in that: The catalyst (4) comprises a catalytic shell (41), the catalytic shell (41) is provided with an air inlet (411) and an air outlet (412), a carrier (42) is provided in the catalytic shell (41), a catalytic medium is provided on the carrier (42), and a gasket (43) is further provided between the catalytic shell (41) and the carrier (42).

3. The exhaust gas treatment system according to claim 2, characterized in that: The catalytic medium is any one of a noble metal catalyst, a transition metal oxide catalyst or a composite catalyst.

4. The exhaust gas treatment system according to any one of claims 1 to 3, characterized in that: The filter chamber (3) is arranged on one side of the catalytic chamber (1), the top of the filter chamber (3) is connected to the catalytic chamber (1), the water mist generator (7) is arranged at the bottom of the filter chamber (3), and the exhaust port (33) is arranged at the bottom of the filter chamber (3); A tail filter (6) is provided on one side of the air outlet (33), and a filter inlet and a filter outlet are provided on the tail filter (6), and the filter outlet is communicated with the air outlet (33).

5. The exhaust gas treatment system according to claim 4, characterized in that: A plurality of partitions (31) are arranged in parallel in the filter chamber (3); one end of each partition (31) is fixed to the inner wall of the filter chamber (3), and an air outlet (32) is formed between the other end opposite to the inner wall of the filter chamber (3); and along the height direction of the filter chamber (3), two adjacent air outlets (32) are staggered with each other.

6. The exhaust gas treatment system according to claim 4, characterized in that: The water mist generator (7) comprises a generator body, a water tank (71) is arranged in the generator body, an ultrasonic transducer (72) is arranged in the water tank (71), a nozzle (74) is arranged above the water tank (71), the nozzle (74) is connected to the air outlet pipe (5), and a water mist outlet (51) is arranged on the air outlet pipe (5).

7. The exhaust gas treatment system according to claim 6, characterized in that: A liquid level sensor (73) is provided in the water tank (71), two of the liquid level sensors (73) are provided, and the two liquid level sensors (73) are respectively provided close to the top and the bottom of the water tank (71), and the distance between the liquid level sensor (73) close to the bottom of the water tank (71) and the bottom of the water tank (71) is greater than 10 cm.

8. A kitchen appliance, comprising an appliance body, characterized in that: The electrical appliance body is provided with an exhaust gas treatment system as described in any one of claims 1 to 7.

9. The kitchen appliance according to claim 8, characterized in that: The electrical appliance body comprises an inner shell (100), an outer shell (200) and a door panel (300), the outer shell (200) covers the periphery of the inner shell (100), a cooking chamber (400) is arranged in the inner shell (100), the door panel (300) is arranged on one side of the cooking chamber (400), and heat pipes (500) are arranged at the top and bottom of the cooking chamber (400); The catalytic chamber (1) is provided on one side of the top of the cooking chamber (400).

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