Electric oven and odor efficient removal device

Abstract

The present invention provides an electric oven and an efficient odor removal device, which can achieve efficient oven odor removal. The electric oven includes: a main body; an air guide portion; an efficient odor removal device, which is connected to the air guide portion and efficiently removes odor from the gas guided by the air guide portion by in-situ coupling of thermal catalysis and electrocatalysis. The device includes: a first mesh layer, a thermocouple catalytic layer, a second mesh layer, which are sequentially arranged along the gas flow direction, and end electrodes arranged at both ends of the thermocouple layer to guide current into the thermocouple catalytic layer; the first mesh layer is used to uniformize gas concentration; the thermocouple catalytic layer is conductive and changes the heating temperature and the electric field strength on the active site as the input current changes, removing odor by in-situ coupling of thermal catalysis and electrocatalysis; the second mesh layer does not contact the thermocouple catalytic layer, blocking foreign matter from the external environment; and an air outlet portion, which is connected to the efficient odor removal device and discharges the gas after odor removal.

Description

Technical Field

[0001] The invention belongs to the field of kitchen appliances, and particularly relates to an electric oven and a high-efficiency odor removal device. Background Art

[0002] With rising living standards, ovens are becoming increasingly popular. However, during the baking process, the pressure inside the oven increases, and the resulting cooking fumes are discharged into the indoor environment through the pressure relief vents, filling the room with a fumes-like odor and severely impacting the user experience. Furthermore, research indicates that cooking fumes contain hundreds of harmful components, posing a threat to user health. Efficiently removing oven odors is a major pain point in oven use and a critical challenge that needs to be addressed in the next phase of oven technology advancement.

[0003] Currently, there are few reports on methods for removing odors from ovens. A small number of researchers have used thermal catalytic oxidation methods, installing a catalyst bed in the oven and surrounding it with heating tubes. The heating tubes heat the ambient temperature within the space, raising the catalyst bed temperature to the catalytic temperature. Under the action of the catalyst, the organic matter in the odor is oxidized into small molecular gases, thereby removing the odor. However, using heating tubes and ambient temperature to indirectly heat the catalyst bed not only results in high energy consumption, but is also difficult to control and has very low heating efficiency, resulting in low actual odor removal efficiency. In addition, the catalyst bed is prone to carbon deposits during the heating process. Carbon deposits can block the catalyst's active sites or pores, leading to catalyst deactivation, which seriously affects the catalyst's odor removal effectiveness and service life. Summary of the Invention

[0004] The present invention is made to solve the above problems, and its purpose is to provide an electric oven and an efficient odor removal device, which can achieve efficient removal of electric oven odor through the in-situ coupling of thermal catalysis and electrocatalysis.

[0005] In order to achieve the above object, the present invention adopts the following scheme:

[0006] <Electric oven>

[0007] The present invention provides an electric oven, characterized in that it comprises: a main body for baking and cooking food placed therein; an air guide part connected to the main body for discharging gas generated by the main body during the baking and cooking process; a high-efficiency odor removal device connected to the air guide part for efficiently removing odor from the gas discharged from the air guide part by in-situ coupling of thermal catalysis and electrocatalysis, comprising: a first mesh layer, a thermocouple catalytic layer, a second mesh layer arranged in sequence along the direction of gas flow, and end electrodes arranged at both ends of the thermocouple catalytic layer for introducing current into the thermocouple catalytic layer; the first mesh layer is used for uniforming gas concentration; the thermocouple catalytic layer is conductive and changes the heating temperature and the electric field strength on the active site as the input current changes, removing odor from the gas by in-situ coupling of thermal catalysis and electrocatalysis; the second mesh layer does not contact the thermocouple catalytic layer and can block foreign matter from the external environment; and an air outlet part connected to the high-efficiency odor removal device for discharging the gas after the odor is removed.

[0008] The beneficial effects of this solution are: first, the gas concentration is uniformed through the first mesh layer, so that the gas enters the thermocouple catalytic layer slowly and evenly; then, a certain current is applied to both ends of the thermocouple catalytic layer, so that the thermocouple catalytic layer self-heats to reach the thermal catalytic reaction temperature, and at the same time, the action of the current also forms an electric field to prompt the active sites of the thermocouple catalytic layer to produce an electrocatalytic effect. Through the simultaneous action of thermal catalysis and electrocatalysis on the gas flowing through, the odor components can be fully and quickly cracked, and the electrocatalytic effect can also effectively inhibit the formation of carbon deposits; finally, the second mesh layer is used to prevent external foreign matter from contacting the thermocouple catalytic layer, and further slow down the gas flow rate, so that the gas can fully contact the thermocouple catalytic layer to remove the odor components. In summary, the present invention adopts the self-heating of the thermocouple catalytic layer, which does not require the additional setting of a heating module and does not require heat conduction through the air. Not only is the device simple and low-cost, but it also effectively improves thermal efficiency and reduces energy consumption. Furthermore, after the current is passed through the thermocouple catalytic layer, it not only generates heat by itself to produce thermal catalysis, but also produces electrocatalysis at the same time. The synergistic effect of thermoelectric coupling can significantly improve the odor removal efficiency and cracking rate, and fully utilizes electrical energy. Moreover, the present invention can effectively inhibit the formation of carbon deposits, extend the service life of the thermocouple catalytic layer, and ensure the catalytic effect. In addition, the thermocouple catalytic layer can change the heating temperature and the electric field strength on the active site as the input current changes, so that the odor removal power consumption can be conveniently and accurately regulated according to the situation, which is both energy-saving and able to effectively remove odors.

[0009] Preferably, the electric oven involved in the present invention may also have the following feature: the high-efficiency odor removal device also includes an adjustment knob connected to the end electrode for adjusting the odor removal intensity.

[0010] Preferably, the electric oven involved in the present invention may further include: a control unit, which is communicatively connected with the main body and the high-efficiency odor removal device to control their operation; wherein, the high-efficiency odor removal device also includes: a temperature sensor for detecting the real-time temperature of the thermocouple catalytic layer, and a current regulating unit connected between the end electrode and the external power supply to regulate the current carrying mode and the current carrying value; when the main body is in the oven preheating stage, the control unit controls the end electrode to supply power to the thermocouple catalytic layer, and preheats the thermocouple catalytic layer to the corresponding preheating temperature according to the set odor removal intensity through the current regulating unit; when the main body enters the baking stage, the control unit quickly heats the thermocouple catalytic layer to the corresponding operating temperature according to the set odor removal intensity through the current regulating unit.

[0011] The advantages of the above preferred solution are as follows: sufficient preheating prevents the thermoelectrically coupled catalytic layer from remaining cold while the oven is operating. This reduces the adhesion of oil smoke within the efficient odor removal device, and allows the electrically coupled catalytic layer to quickly enter operation after baking begins, enhancing odor removal for foods prone to producing oil smoke. Furthermore, the first and second mesh layers can be preheated to raise the temperature and improve odor removal efficiency. The preheating temperature is slightly lower than the operating temperature, saving electricity costs and avoiding the need to maintain high temperatures during non-baking.

[0012] Preferably, the electric oven of the present invention may also have the following feature: during the baking stage, the current regulating unit causes the thermoelectric coupling catalytic layer to carry a cyclic current in a sinusoidal waveform within a certain current range.

[0013] The beneficial effects of the above preferred scheme are: during baking, the electrically coupled catalytic layer adopts a cyclic current carrying method, carrying current in a sinusoidal waveform within a certain current range. The cyclic current carrying method can maintain the temperature of the thermocouple catalytic layer while making full use of the stronger electrocatalytic effect under large current to achieve better odor removal effect.

[0014] Preferably, the electric oven of the present invention may also have the following feature: the frequency of the sinusoidal cyclic current is 1 to 10 Hz.

[0015] Preferably, the electric oven of the present invention may also have the following feature: the operating temperature is 100-200° C. higher than the preheating temperature.

[0016] Preferably, the electric oven of the present invention may also have the following feature: the thermoelectrically coupled catalytic layer utilizes a metal foam material having a thermocatalytic-electrocatalytic coupled catalytic effect and loaded with a metal. The modified metal foam is formed by loading the metal onto an iron-chromium-aluminum foam, nickel-chromium foam, or nickel-iron-chromium-aluminum foam using an impregnation method, a sol-gel method, or a magnetron sputtering method. The loaded metal may be at least one of platinum, copper, and cobalt.

[0017] Preferably, the electric oven involved in the present invention may also have the following characteristics: the resistance of the thermocouple catalytic layer is 0.01Ω~1Ω, the current introduced into the thermocouple catalytic layer by the end electrode is 10A~100A, and the temperature of the thermocouple catalytic layer reaches 200℃~800℃ after power is turned on.

[0018] Preferably, the electric oven involved in the present invention may also have the following features: the air guide portion is the baking cooking cavity wall of the main body, the high-efficiency odor removal device is arranged above the air guide portion, and in the high-efficiency odor removal device, the first mesh layer, the thermoelectric coupling catalytic layer, and the second mesh layer are arranged in sequence from bottom to top.

[0019] Preferably, the electric oven of the present invention may also have the following features: the first mesh layer is a stainless steel mesh with a pore size of 150 to 1000 microns, and the second mesh layer is a stainless steel mesh with a pore size of 48 to 120 microns. The larger pore size of the first mesh layer prevents clogging and facilitates cleaning; the smaller pore size of the second mesh layer can, on the one hand, slow the flow rate of flue gas in the oven odor removal device to a certain extent, preventing energy loss and ensuring treatment effectiveness; on the other hand, it can effectively prevent foreign matter such as dust from the environment from falling into the thermocouple catalytic layer, ensuring the odor removal effect of the electric oven after long-term storage.

[0020] Preferably, the electric oven of the present invention may also have the following features: the spacing between the first mesh layer and the thermocouple catalytic layer is 5 to 10 mm, and the spacing between the second mesh layer and the thermocouple catalytic layer is 10 to 20 mm. The small spacing between the first mesh layer and the thermocouple catalytic layer can appropriately increase the temperature of the first mesh layer. On the one hand, it can preheat the gas, thereby increasing the gas temperature and increasing the catalytic efficiency. On the other hand, it can also reduce the adhesion of the gas to the first mesh layer, reduce the risk of blockage of the first mesh layer, and reduce the frequency of cleaning. The large spacing between the second mesh layer can, on the one hand, slow down the speed at which the gas leaves the thermocouple catalytic layer, allowing the gas to fully contact the thermocouple catalytic layer as much as possible to undergo cracking reaction to remove odor components. On the other hand, it can also prevent the temperature of the second mesh layer from being too high, thereby reducing the temperature of the exhaust gas.

[0021] <Device>

[0022] Furthermore, the present invention also provides an efficient odor removal device for removing odor from gas in an electric oven, which is characterized in that it includes: a first mesh layer, a thermocouple catalytic layer, and a second mesh layer arranged in sequence along the gas flow direction, and end electrodes arranged at both ends of the thermocouple catalytic layer to introduce current into the thermocouple catalytic layer, wherein the first mesh layer is used to uniform the gas concentration; the thermocouple catalytic layer is conductive and changes the heating temperature and the electric field strength on the active site as the input current changes, and removes odor from the gas by in-situ coupling of thermal catalysis and electrocatalysis; the second mesh layer does not contact the thermocouple catalytic layer and can block foreign matter from the external environment.

[0023] Preferably, the high-efficiency odor removal device of the present invention may further include: an adjustment knob connected to the end electrode for adjusting the odor removal intensity.

[0024] Preferably, the efficient odor removal device involved in the present invention may also include: a temperature sensor for detecting the real-time temperature of the thermocouple catalytic layer, a current regulating unit connected between the end electrode and the external power supply to regulate the current carrying mode and current carrying value, and a controller that communicates with the thermocouple catalytic layer and the end electrode and controls their operation; wherein, the control unit can control the end electrode to supply power to the thermocouple catalytic layer in the preheating stage, and preheat the thermocouple catalytic layer to the corresponding preheating temperature according to the set odor removal intensity through the current regulating unit; and the control unit can also quickly heat the thermocouple catalytic layer to the corresponding operating temperature according to the set odor removal intensity through the current regulating unit in the efficient removal stage (when a large amount of odorous gas to be removed appears) to efficiently remove odor.

[0025] Preferably, the high-efficiency odor removal device of the present invention may also have the following feature: in the high-efficiency removal stage, the current regulating unit causes the thermocouple catalytic layer to circulate current in a sinusoidal waveform within a certain current range.

[0026] Preferably, the high-efficiency odor removal device of the present invention may also have the following feature: the current carrying frequency of the sinusoidal waveform cyclic current is 1 to 10 Hz.

[0027] Preferably, the high-efficiency odor removal device of the present invention may also have the following feature: the operating temperature is 100 to 200° C. higher than the preheating temperature.

[0028] Preferably, the high-efficiency odor removal device of the present invention may also have the following feature: the thermoelectrically coupled catalytic layer utilizes a metal foam material having a thermocatalytic-electrocatalytic coupled catalytic effect and loaded with a metal. The modified metal foam is formed by loading the metal onto an iron-chromium-aluminum foam, nickel-chromium foam, or nickel-iron-chromium-aluminum foam using an impregnation method, a sol-gel method, or a magnetron sputtering method. The loaded metal may be at least one of platinum, copper, and cobalt.

[0029] Preferably, the high-efficiency odor removal device involved in the present invention may also have the following characteristics: the resistance of the thermocouple catalytic layer is 0.01Ω~1Ω, the current introduced into the thermocouple catalytic layer by the end electrode is 10A~100A, and the temperature of the thermocouple catalytic layer reaches 200℃~800℃ after power is turned on.

[0030] Preferably, the high-efficiency odor removal device of the present invention may also have the following features: in the high-efficiency odor removal device, the first mesh layer, the thermoelectric coupling catalytic layer, and the second mesh layer are arranged in sequence from bottom to top.

[0031] Preferably, the high-efficiency odor removal device of the present invention may also have the following features: the first mesh layer is a stainless steel mesh with a pore size of 150 to 1000 microns, and the second mesh layer is a stainless steel mesh with a pore size of 48 to 120 microns. The larger pore size of the first mesh layer prevents clogging and facilitates cleaning; the smaller pore size of the second mesh layer can, on the one hand, slow the flow rate of flue gas in the oven odor removal device to a certain extent, preventing energy loss and ensuring treatment effectiveness; on the other hand, it can effectively prevent foreign matter such as dust from the environment from falling into the thermocouple catalytic layer, ensuring the odor removal effect of the electric oven after long-term storage.

[0032] Preferably, the high-efficiency odor removal device of the present invention may also have the following features: the spacing between the first mesh layer and the thermocouple catalytic layer is 5 to 10 mm, and the spacing between the second mesh layer and the thermocouple catalytic layer is 10 to 20 mm. The small spacing between the first mesh layer and the thermocouple catalytic layer can appropriately increase the temperature of the first mesh layer. On the one hand, it can preheat the gas, thereby increasing the gas temperature and increasing the catalytic efficiency. On the other hand, it can also reduce the adhesion of the gas to the first mesh layer, reduce the risk of blockage of the first mesh layer, and reduce the frequency of cleaning. The large spacing between the second mesh layer can, on the one hand, slow down the speed at which the gas leaves the thermocouple catalytic layer, allowing the gas to fully contact the thermocouple catalytic layer as much as possible to undergo cracking reaction to remove odor components. On the other hand, it can also prevent the temperature of the second mesh layer from being too high, thereby reducing the temperature of the exhaust flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 1 is a schematic structural diagram of an electric oven according to an embodiment of the present invention;

[0034] Figure 2 Schematic diagram of the structure of the highly efficient odor removal device (thermocatalytic-electrocatalytic in-situ coupled highly efficient odor removal device) involved in an embodiment of the present invention;

[0035] Figure 3 It is an exploded view of the high-efficiency odor removal device involved in an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The electric oven and the device for efficiently removing odors according to the present invention will be described in detail below with reference to the accompanying drawings.

[0037] <Example>

[0038] like Figures 1 to 3 As shown, the electric oven 10 includes a main body 11, an air guide portion 12, a high-efficiency odor removal device 13, an air outlet portion 14 and a control portion.

[0039] The main body 11 bakes and cooks the food placed therein.

[0040] The air guide portion 12 is a baking and cooking cavity wall of the main body 11 , and is used to guide the gas generated by the main body 11 during the baking and cooking process to the odor efficient removal device 13 .

[0041] The highly efficient odor removal device 13 is a thin rectangular plate (heightened and thickened for clarity in the figure) connected to the air guide 12. It efficiently removes odors from the gas exiting the air guide 12 through an in-situ coupling of thermal and electrocatalytic catalysis. It comprises a first mesh layer 131, a thermoelectrically coupled catalytic layer 132, an end electrode 133, an adjustment knob 134, a second mesh layer 135, a gasket 136, side seals 137, an end seal 138, a temperature sensor 139, and a current regulating unit.

[0042] The first mesh layer 131 is disposed above the gas guide portion 12 to uniformly distribute the gas concentration. In this embodiment, the first mesh layer 131 is a stainless steel mesh with a pore size of 150 to 1000 microns.

[0043] Thermocouple catalytic layer 132 is located directly above first mesh layer 131 and is spaced 5 to 10 mm apart from first mesh layer 131. Thermocouple catalytic layer 132 has a porous structure and exhibits both electrical conductivity and thermocatalytic and electrocatalytic properties. It can change the heating temperature and the electric field strength at the active sites as the input current changes. Through in-situ coupling of thermocatalysis and electrocatalysis (dual thermoelectric effects), it removes odors from the gas, completely eliminating odors within the electric oven 10. In this embodiment, thermocouple catalytic layer 132 is a modified metal foam. The resistance of thermocouple catalytic layer 132 is 0.01 Ω to 1 Ω.

[0044] The terminal electrodes 133 are connected to both ends of the thermocouple catalytic layer 132 via terminal electrode bolts 133a. They are also connected to a power source via wires sleeved onto the terminal electrode bolts 133a, thereby conducting current into the thermocouple catalytic layer 132. In this embodiment, the terminal electrodes 133 and terminal electrode bolts 133a are made of aluminum, which offers low cost, light weight, high temperature resistance, and good electrical conductivity. The aluminum oxide formed on the surface effectively protects the electrode itself, extending the service life of the terminal electrodes 133, reducing the frequency of terminal electrode 133 replacement, lowering the manufacturing and operating costs of the electrode, and reducing the weight of the device. The current conducted by the terminal electrodes 133 into the thermocouple catalytic layer 132 is 10A to 100A. After power is applied, the temperature of the thermocouple catalytic layer 132 reaches 300°C to 800°C.

[0045] Adjustment knob 134 is connected to terminal electrode 133 and allows the user to select and set the odor removal intensity based on different usage requirements. This allows the user to adjust the temperature of the modified metal foam and the strength of the electric field at the active sites, specifically reducing or increasing the input power to the thermocouple catalytic layer 132, thereby conveniently and controllably removing odors from gases generated by various baking and cooking processes. In this embodiment, four settings are provided for user selection: "Weak," "Medium," "Strong," and "Strongest," as shown in Table 1 below.

[0046] The second mesh layer 135 is located above the thermocouple catalytic layer 132 and is spaced 10 to 20 mm from the thermocouple catalytic layer 132, thereby preventing foreign matter from contaminating the thermocouple catalytic layer 132. In this embodiment, the second mesh layer 135 is a stainless steel mesh with a pore size of 48 to 120 microns.

[0047] The gasket member 136 includes an upper gasket 136a, a lower gasket 136a, a top gasket 136c, and a bottom gasket 136d. The upper gasket 136a and the lower gasket 136b are both rectangular frame-shaped and are respectively arranged on the upper and lower sides of the thermocouple catalytic layer 132, and are respectively in contact with the edge areas of the second mesh layer 135 and the first mesh layer 131. The distance between the second mesh layer 135, the thermocouple catalytic layer 132, and the first mesh layer 131 is controlled by adjusting the thickness of the upper gasket 136a and the lower gasket 136b. In this embodiment, the upper gasket 136a and the lower gasket 136b are both made of synthetic mica, which has insulation and low-loss thermal resistance functions, and can block the electricity and heat in the thermocouple catalytic layer 132 from being conducted to the second mesh layer 135 and the first mesh layer 131. Top gasket 136c and bottom gasket 136d are also rectangular frames, positioned at the top and bottom edges of second mesh layer 135 and first mesh layer 131, respectively, and are each 3-5 mm thick. Bolts 136e securely connect top gasket 136a, bottom gasket 136a, top gasket 136c, bottom gasket 136d, second mesh layer 135, thermocouple catalyst layer 132, and first mesh layer 131.

[0048] The side sealing plates 137 and the end sealing plates 138 are both made of insulating and heat-isolating materials, and encapsulate the odor efficient removal device 13 from two side surfaces and two ends.

[0049] In this embodiment, the fastening bolts 136e, the side sealing plates 137 and the end sealing plates 138 are all made of ceramic materials, which are insulating and have good thermal stability and strength.

[0050] The temperature sensor 139 is disposed near the thermocouple catalytic layer 132 and is used to detect the real-time temperature of the thermocouple catalytic layer 132 .

[0051] The current regulating unit is connected between the terminal electrode 133 and the external power supply, and can regulate the current carrying mode and current carrying value.

[0052] The control unit is in communication with the main unit 11 and the high-efficiency odor removal device 13 to control their operation. When the main unit 11 is in the oven preheating phase, the control unit controls the terminal electrode 133 to supply power to the thermocouple catalytic layer 132 and, through the current regulating unit, preheats the thermocouple catalytic layer 132 to the corresponding preheating temperature based on the set odor removal intensity. When the main unit 11 enters the baking phase, the control unit, through the current regulating unit, rapidly heats the thermocouple catalytic layer 132 to the corresponding operating temperature based on the set odor removal intensity. In this embodiment, the correspondence between the odor removal intensity and the adjustment parameters of the current regulating unit is shown in Table 1 below.

[0053] Table 1 Correspondence between odor removal intensity and current regulation unit adjustment parameters

[0054]

[0055] The gas outlet 14 is connected to the top of the odor efficient removal device 13 to discharge the gas after the odor is removed. In this embodiment, the gas outlet 14 is an outlet provided on the top of the electric oven.

[0056] The above is the specific structure of the electric oven 10 provided in this embodiment. Based on the above structure, its working process is as follows:

[0057] First, the user puts the food to be cooked into the electric oven 10 , sets the deodorization intensity by adjusting the knob 134 , and turns on the main body 11 .

[0058] Then, the main body 11 enters the oven preheating stage, the control unit controls the end electrode 133 to supply power to the thermocouple catalytic layer 132, and preheats the thermocouple catalytic layer 132 to the corresponding preheating temperature according to the set deodorization intensity through the current regulating unit and the temperature sensor 139.

[0059] Subsequently, when the main body 11 is preheated to the baking temperature, it enters the baking stage and produces a large amount of odorous gas. The control unit uses the current regulating unit and the temperature sensor 139 to quickly heat the thermocouple catalytic layer 132 to the corresponding operating temperature according to the set deodorization intensity.

[0060] During the preheating and baking operation of the main body 11, the released odorous gases (generated by cooking and brought by the food) pass through the catalytic oxidation module and enter the odor efficient removal device 13 along the air guide portion 12. After entering the odor efficient removal device 13, the gas first contacts the first mesh layer 131, the flow rate is slowed down, the gas is preheated by the first mesh layer 131, and is evenly dispersed by the first mesh layer 131, and then flows through the mesh of the first mesh layer 131 to the thermoelectric coupling catalytic layer 132; under the action of electric current, the thermoelectric coupling catalytic layer 132 produces thermal catalytic and electrocatalytic coupling effects, treating the gas, so that the odor components are completely oxidized and cracked into carbon dioxide and water; the removed gas flows to the second mesh layer 135, the flow rate is further slowed down and cooled, and then flows through the mesh of the second mesh layer 135 to the air outlet 14 and is discharged outside the electric oven 10.

[0061] To verify the effectiveness, tests were conducted using volatile organic compounds (VOCs) under the weakest setting of the present invention's high-efficiency odor removal device 13 (thermal-electric synergistic catalytic reaction) and under conventional thermal catalytic reaction conditions, breaking the VOCs into small-molecule gases. As shown in Table 2 below, the carbon conversion rate reached 80% under the thermal-electric synergistic catalytic reaction conditions of the present invention, while the carbon conversion rate under conventional thermal catalytic reaction conditions was only 64%. Furthermore, the amount of carbon deposited under the thermal-electric synergistic catalytic reaction conditions of the present invention was only half that of the conventional thermal catalytic reaction conditions.

[0062] Table 2 Comparison of thermal-electric synergistic catalysis and thermal catalysis performance

[0063]

[0064] The above is merely an illustrative example of the technical solution of the present invention. The electric oven and high-efficiency odor removal device involved in the present invention are not limited solely to the structure described above, but are subject to the scope defined by the claims. Any modifications, supplements, or equivalent substitutions made by persons skilled in the art based on the above are within the scope of protection claimed in the claims.

Claims

1. An electric oven, characterized in that: include: The main body is used to bake and cook the food put into it; an air guide portion connected to the main body portion and configured to guide the gas generated by the main body portion during the baking and cooking process; An efficient odor removal device is connected to the air guide portion and is used to efficiently remove odor from the gas guided out by the air guide portion by in-situ coupling of thermal catalysis and electrocatalysis, comprising: a first mesh layer, a thermocouple catalytic layer, a second mesh layer sequentially arranged along the gas flow direction, and end electrodes arranged at both ends of the thermocouple catalytic layer to introduce current into the thermocouple catalytic layer; the first mesh layer is used to uniformize the gas concentration; the thermocouple catalytic layer is a porous structure with electrical conductivity and thermal and electrocatalytic properties, and can change the heating temperature and the electric field strength on the active site as the input current changes, thereby removing odor from the gas by in-situ coupling of thermal catalysis and electrocatalysis; the second mesh layer is not in contact with the thermocouple catalytic layer and can block foreign matter from the external environment; and The gas outlet is connected to the high-efficiency odor removal device and discharges the gas after the odor is removed; Wherein, during the baking stage, the thermocouple catalytic layer carries current in a sinusoidal waveform cycle within a certain current range, and the frequency of the sinusoidal waveform cycle is 1 to 10 Hz; The thermoelectric coupling catalytic layer adopts a foam metal material having a thermocatalytic-electrocatalytic coupling catalytic effect and loaded with metal.

2. The electric oven according to claim 1, characterized in that: in, The highly efficient odor removal device further comprises: an adjustment knob connected to the end electrode for adjusting the odor removal intensity.

3. The electric oven according to claim 1, characterized in that: Also includes: a control unit, communicating with the main body and the odor efficient removal device to control their operation; The odor efficient removal device further comprises: a temperature sensor for detecting the real-time temperature of the thermocouple catalytic layer, and a current regulating unit connected between the terminal electrode and the external power supply for regulating the current carrying mode and the current carrying value; When the main body is in the oven preheating stage, the control unit controls the terminal electrode to supply power to the thermocouple catalytic layer, and preheats the thermocouple catalytic layer to a corresponding preheating temperature according to the set deodorization intensity through the current regulating unit; When the main body enters the baking stage, the control unit causes the thermocouple catalytic layer to quickly heat up to a corresponding operating temperature according to the set deodorization intensity through the current regulating unit.

4. The electric oven according to claim 3, characterized in that: in, During the baking stage, the current regulating unit causes the thermocouple catalytic layer to carry a cyclic current in a sinusoidal waveform within a certain current range.

5. The electric oven according to claim 3, characterized in that: in, The preheating temperature is 100-200° C. lower than the operating temperature.

6. The electric oven according to claim 1, characterized in that: in, The air guide portion is the baking and cooking cavity wall of the main body, and the high-efficiency odor removal device is arranged above the air guide portion. In the high-efficiency odor removal device, the first mesh layer, the thermoelectric coupling catalytic layer, and the second mesh layer are arranged in sequence from bottom to top.

7. The electric oven according to claim 1, characterized in that: in, The first mesh layer is a stainless steel mesh with a pore size of 150 to 1000 microns, and the second mesh layer is a stainless steel mesh with a pore size of 48 to 120 microns.

8. The electric oven according to claim 1, characterized in that: in, The distance between the first mesh layer and the thermocouple catalytic layer is 5 to 10 mm. The distance between the second mesh layer and the thermoelectric coupling catalytic layer is 10 to 20 mm.

9. An efficient odor removal device for removing odor from gas in an electric oven, characterized in that: include: The first mesh layer, the thermocouple catalytic layer, the second mesh layer are sequentially arranged along the gas flow direction, and the terminal electrodes are arranged at both ends of the thermocouple catalytic layer to introduce current into the thermocouple catalytic layer. The first mesh layer is used to uniformize the gas concentration; the thermocouple catalytic layer is conductive and changes the heating temperature and the electric field strength on the active site as the input current changes, removing odor from the gas through in-situ coupling of thermal catalysis and electrocatalysis; the second mesh layer does not contact the thermocouple catalytic layer and can block foreign matter from the external environment; Wherein, during the baking stage, the thermocouple catalytic layer carries current in a sinusoidal waveform cycle within a certain current range, and the frequency of the sinusoidal waveform cycle is 1 to 10 Hz; The thermoelectric coupling catalytic layer adopts a foam metal material having a thermocatalytic-electrocatalytic coupling catalytic effect and loaded with metal.

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