Waste gas purification structure for cooking device and cooking device

Abstract

The utility model relates to a waste gas purification structure for a cooking device and the cooking device, and the waste gas purification structure comprises an inner container which is used for placing food to be cooked and is provided with an exhaust port; the exhaust channel is provided with an exhaust fan, one end of the exhaust channel is in fluid communication with the exhaust port, and the other end of the exhaust channel is communicated with the outside; the first purification module is arranged in the exhaust channel and is used for purifying airflow flowing through the exhaust channel; the first backflow opening is formed in the exhaust channel and located behind the first purification module in the airflow flowing direction; the second backflow port is formed in the exhaust channel and located in front of the first purification module in the airflow flowing direction; and the backflow channel is provided with a backflow fan and is used for enabling the first backflow port and the second backflow port to be in fluid communication. According to the utility model, the waste gas generated in the cooking process can be prevented from being directly exhausted, and the circulating purification of the airflow can be realized, so that the purification effect is improved.

Description

Technical Field

[0001] The utility model relates to the field of cooking devices, in particular to an exhaust gas purification structure for cooking devices and the cooking device. Background Art

[0002] An oven is a cooking device that uses radiant heat to heat food. Currently, the exhaust gas generated by the oven during the cooking process is generally discharged directly to the outside. For example, there is the Chinese utility model patent "An exhaust structure of a cooking device and a steam oven" with patent number ZL 202222653967.2 (authorization publication number CN218474480U), and the Chinese invention patent "A steam oven and its exhaust control method" with patent number ZL 202210040203.8 (authorization publication number CN114468792B).

[0003] Directly discharging the waste gas generated during cooking will cause the following problems: (1) The waste gas generated during cooking is discharged into the kitchen space at will. If users inhale these waste gases for a long time while working in the kitchen, it will damage the human respiratory system and affect their health; (2) The waste gas generated during cooking is sucked away by the range hood and discharged into the atmosphere. If humans continue to discharge waste gas in this way for a long time, it will damage the natural atmospheric environment and pollute the atmospheric environment. Summary of the Invention

[0004] The first technical problem to be solved by the present invention is to provide an exhaust gas purification structure for a cooking device that has a purification effect on exhaust gas generated during the cooking process in response to the existing technology.

[0005] The second technical problem to be solved by the present invention is to provide an exhaust gas purification structure for a cooking device that has a good purification effect on exhaust gas generated during cooking, in response to the existing technology.

[0006] The third technical problem to be solved by the present invention is to provide a cooking device with the above-mentioned exhaust gas purification structure in view of the existing technology.

[0007] The technical solution adopted by the present invention to solve at least one of the above technical problems is: an exhaust gas purification structure for a cooking device, comprising:

[0008] An inner pot, used for placing food to be cooked and having an exhaust port;

[0009] an exhaust passage having an exhaust fan, one end of which is in fluid communication with the exhaust port and the other end of which is in fluid communication with the outside;

[0010] It is characterized by:

[0011] a first purification module, disposed in the exhaust passage and configured to purify the airflow passing through the exhaust passage;

[0012] A first reflow port is provided on the exhaust passage and is located after the first purification module along the airflow direction;

[0013] a second reflow port, which is provided on the exhaust passage and is located before the first purification module along the airflow direction; and

[0014] The return channel has a return fan and is used to connect the first return port and the second return port to each other.

[0015] Furthermore, the exhaust channel includes an inlet channel and an outlet channel, wherein one end of the inlet channel is connected to the exhaust port and the other end is connected to the inlet of the exhaust fan, and one end of the outlet channel is connected to the outlet of the exhaust fan and the other end is connected to the outside world. The first return port is provided on the outlet channel, and the second return port is provided on the inlet channel. This allows the exhaust fan and the return fan to cooperate better to drive the return airflow.

[0016] Furthermore, the first purification module is disposed in the air inlet passage and includes a catalyst, and the second reflux port coincides with the first port of the air inlet passage, the first port being used to connect to the exhaust port. The inner liner is provided with a return air port, which is connected to the first reflux port via the reflux passage, and the return air port is fluidically connected to the exhaust port. This facilitates fluid communication between the first reflux port and the second reflux port, and the reflux airflow flows back into the inner liner through the return air port and then enters the air inlet passage, which can reheat the reflux airflow, thereby ensuring the re-purification effect of the first purification module (the catalyst needs to maintain a certain catalytic temperature).

[0017] Furthermore, the exhaust channel is provided on the inner container, the exhaust port is provided on the rear side of the inner container top plate, and the return air port is provided above the inner container back plate, and the return air port is provided adjacent to the exhaust port, thereby better ensuring fluid communication between the return air port and the second return port.

[0018] Furthermore, the air inlet passage extends vertically, and its cross-sectional area increases from bottom to top, so that the airflow in the air inlet passage can be more smoothly sucked into the exhaust fan.

[0019] Furthermore, a heating tube is mounted on the inner top surface of the liner, located below the exhaust port. The first purification module comprises a substrate with vertically extending honeycomb channels and the catalyst disposed within each channel. The heating tube effectively reheats the return gas and ensures that the airflow passing through the first purification module fully contacts the catalyst, allowing for a catalytic reaction.

[0020] Furthermore, a second purification module is included, which is disposed in the outlet channel and is used to purify the airflow passing through the outlet channel. The second purification module is located after the first return port along the airflow direction. In this way, the cooperation between the first purification module and the second purification module can fully purify the airflow and better avoid contamination of the external air environment.

[0021] Furthermore, the second purification module is embedded in the port of the air outlet channel communicating with the outside, so that the airflow can be fully purified by the second purification module before being discharged.

[0022] Furthermore, a smoke detection device is provided on the air outlet channel, and is positioned between the first return port and the second purification module. The smoke detection device can detect the airflow entering the second purification module. If the airflow purification rate does not meet the standard, the return fan is turned on, and the airflow is returned to the first purification module for circulation and purification.

[0023] The technical solution adopted to further solve the third technical problem mentioned above is: a cooking device, characterized in that it includes the exhaust gas purification structure for the cooking device as described above.

[0024] Compared with the prior art, the advantage of the present invention is that a first purification module is provided in the exhaust channel, and the airflow passing through the exhaust channel can be purified by the first purification module, thereby preventing the waste gas generated during the cooking process from being directly discharged.

[0025] Furthermore, a first return port and a second return port are provided on the exhaust channel, and a return channel with a return fan is used to connect the first return port and the second return port to fluid, so that the airflow purified by the first purification module can flow back to the upstream of the first purification module through the return channel, and then pass through the first purification module to achieve circulation purification, thereby improving the purification effect of the airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of the exhaust gas purification structure in an embodiment of the present utility model;

[0027] Figure 2 for Figure 1 Enlarged view of part A. DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0030] A cooking device (such as an oven, a steam oven, etc.) includes an exhaust gas purification structure, such as Figures 1-2 As shown, the exhaust gas purification structure includes an inner pot 1, an exhaust channel 2, a first purification module 4, a first return port 211, a second return port 221 and a return channel 6. The inner pot 1 is used to place food to be cooked and has an exhaust port 11. The exhaust channel 2 has an exhaust fan 3, one end of which is fluidically connected to the above-mentioned exhaust port 11, and the other end is connected to the outside world. The first purification module 4 is arranged in the above-mentioned exhaust channel 2 and is used to purify the airflow flowing through the exhaust channel 2. The first return port 211 is opened on the above-mentioned exhaust channel 2 and is located after the above-mentioned first purification module 4 along the direction of airflow. The second return port 221 is opened on the above-mentioned exhaust channel 2 and is located before the above-mentioned first purification module 4 along the direction of airflow. The return channel 6 has a return fan 7 and is used to make the above-mentioned first return port 211 and the second return port 221 fluidically connected.

[0031] As can be seen from the above, the exhaust duct 2 of the present invention is provided with a first purification module 4, which can purify the airflow flowing through the exhaust duct 2, thereby preventing the exhaust gas generated during the cooking process from being directly discharged. Furthermore, the exhaust duct 2 is also provided with a first return port 211 and a second return port 221. At the same time, a return channel 6 having a return fan 7 is used to fluidically connect the first return port 211 and the second return port 221. In this way, the airflow purified by the first purification module 4 can be returned to the upstream of the first purification module 4 through the return channel 6, and then circulated and purified through the first purification module 4, thereby improving the purification effect of the airflow.

[0032] Furthermore, the exhaust channel 2 includes an inlet channel 21 and an outlet channel 22, wherein one end of the inlet channel 21 is connected to the exhaust port 11 and the other end is connected to the air inlet of the exhaust fan 3. One end of the outlet channel 22 is connected to the air outlet of the exhaust fan 3 and the other end is connected to the outside. The first return port 211 is provided on the outlet channel 22, and the second return port 221 is provided on the inlet channel 21. This allows the exhaust fan 3 and the return fan 7 to better drive the return airflow.

[0033] Furthermore, the first purification module 4 is disposed in the air inlet channel 21 and includes a catalyst, and the second return port 221 coincides with the first port of the air inlet channel 21, the first port being used to connect to the exhaust port 11. The inner liner 1 is provided with a return air port 12, which is connected to the first return air port 211 through the return channel 6, and the return air port 12 is in phase fluid communication with the exhaust port 11. This facilitates phase fluid communication between the first return air port 211 and the second return air port 221, and the return air flow flows back into the inner liner 1 through the return air port 12 and then enters the air inlet channel 21, which can reheat the return air flow, thereby ensuring the re-purification effect of the first purification module 4 (the catalyst needs to maintain a certain catalytic temperature).

[0034] Preferably, the exhaust channel 2 is arranged above the inner liner 1, the exhaust port 11 is opened on the rear side of the top plate of the inner liner 1, and the return air port 12 is opened above the back plate of the inner liner 1. The return air port 12 is adjacent to the exhaust port 11, so as to better ensure the phase fluid communication between the return air port 12 and the second return port 221. Furthermore, the air inlet channel 21 extends vertically, and its cross-sectional area increases from bottom to top, so that the airflow in the air inlet channel 21 can be more smoothly sucked into the exhaust fan 3. Further preferably, a heating pipe 10 is installed on the inner top surface of the inner liner 1, and the heating pipe 10 is located below the exhaust port 11, and the first purification module 4 includes a substrate with vertically extending honeycomb channels and the catalyst arranged in each channel. On the one hand, the heating pipe 10 can better reheat the return gas, and on the other hand, it can make the airflow passing through the first purification module 4 fully contact with the catalyst and produce a catalytic reaction.

[0035] Furthermore, a second purification module 5 is included. This second purification module 5 is disposed within the outlet passage 22 and is used to purify the airflow passing through the outlet passage 22. It is located after the first return port 211 along the airflow direction. Thus, the coordinated action of the first purification module 4 and the second purification module 5 enables sufficient purification of the airflow, thereby better preventing contamination of the external air environment. Preferably, the second purification module 5 is embedded in the port of the outlet passage 22 that communicates with the outside world, allowing the airflow to be fully purified by the second purification module 5 before being discharged.

[0036] Furthermore, a smoke detection device 8 is provided on the air outlet channel 22 and is disposed between the first return port 211 and the second purification module 5. The smoke detection device 8 can detect the airflow entering the second purification module 5. When the airflow purification rate does not meet the standard, the return fan 7 is turned on, and the airflow is returned to the first purification module 4 for circulation and purification.

[0037] The "fluid communication" referred to in the present invention refers to the spatial positional relationship between two components or parts (hereinafter collectively referred to as the first part and the second part), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path and / or be transported to the second part. The first part and the second part can be directly connected to each other, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, conduit, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. An exhaust gas purification structure for a cooking device, comprising: An inner pot (1) for placing food to be cooked and having an exhaust port (11); An exhaust passage (2) having an exhaust fan (3) with one end in fluid communication with the exhaust port (11) and the other end in communication with the outside world; It is characterized by: a first purification module (4), disposed in the exhaust passage (2) and used to purify the airflow flowing through the exhaust passage (2); A first reflow port (211) is provided on the exhaust passage (2) and is located after the first purification module (4) along the airflow direction; A second reflow port (221) is provided on the exhaust passage (2) and is located before the first purification module (4) along the airflow direction; and The return channel (6) has a return fan (7) and is used to connect the first return port (211) and the second return port (221) to each other.

2. The exhaust gas purification structure for a cooking device according to claim 1, characterized in that: The exhaust channel (2) comprises an air inlet channel (21) and an air outlet channel (22), wherein one end of the air inlet channel (21) is connected to the exhaust port (11), and the other end is connected to the air inlet (31) of the exhaust fan (3); one end of the air outlet channel (22) is connected to the air outlet of the exhaust fan (3), and the other end is connected to the outside world; the first return port (211) is provided on the air outlet channel (22), and the second return port (221) is provided on the air inlet channel (21).

3. The exhaust gas purification structure for a cooking device according to claim 2, characterized in that: The first purification module (4) is arranged in the air inlet channel (21) and includes a catalyst. The second return port (221) coincides with the first port of the air inlet channel (21), and the first port is used to be connected to the exhaust port (11). The inner tank (1) is provided with a return air port (12), and the return air port (12) is connected to the first return air port (211) through the return channel (6), and the return air port (12) is fluidically connected to the exhaust port (11).

4. The exhaust gas purification structure for a cooking device according to claim 3, characterized in that: The exhaust passage (2) is arranged above the inner liner (1), the exhaust port (11) is opened on the rear side of the top plate of the inner liner (1), and the return air port (12) is opened above the back plate of the inner liner (1), and the return air port (12) is adjacent to the exhaust port (11).

5. The exhaust gas purification structure for a cooking device according to claim 4, characterized in that: The air inlet channel (21) extends vertically, and its cross-sectional area increases from bottom to top.

6. The exhaust gas purification structure for a cooking device according to claim 5, characterized in that: A heating pipe (10) is installed on the inner top surface of the inner tank (1), and the heating pipe (10) is located below the exhaust port (11), and the first purification module (4) includes a substrate having vertically extending honeycomb channels and the catalyst arranged in each channel.

7. The exhaust gas purification structure for a cooking device according to any one of claims 2 to 6, characterized in that: It also includes a second purification module (5), which is arranged in the above-mentioned air outlet channel (22) and is used to purify the air flow flowing through the air outlet channel (22), and is located after the above-mentioned first return port (211) along the air flow direction.

8. The exhaust gas purification structure for a cooking device according to claim 7, characterized in that: The second purification module (5) is embedded in the port of the air outlet channel (22) communicating with the outside world.

9. The exhaust gas purification structure for a cooking device according to claim 7, characterized in that: A smoke detection device (8) is also provided on the air outlet channel (22), and the smoke detection device (8) is arranged between the first reflux port (211) and the second purification module (5).

10. A cooking device, characterized in that: The invention comprises the exhaust gas purification structure for a cooking device as claimed in any one of claims 1 to 9.

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