Lampblack purification device and steaming oven
By introducing the design of heat-insulating channels and air supply components into the fume purification device, the problem of poor heat dissipation caused by the compact structure is solved, the gas temperature is reduced, the steam oven components are protected and the pollution to the external environment is reduced.
Patent Information
- Application Number
- CN202311442548.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-31
- Publication Date
- 2025-05-02
AI Technical Summary
The existing oil fume purification device has a compact structure, resulting in poor heat dissipation effect, which affects the service life and function of other components of the steam oven.
A fume purification device was designed, which included a heat-insulating channel, an exhaust channel, a purification channel, and an air supply assembly. High-temperature gas and low-temperature gas were mixed and discharged through the air supply assembly. The heat insulation between the heat-insulating channel and the exhaust channel was used to reduce the gas temperature and prevent heat from being transferred to other components.
It effectively reduces the temperature of the purified gas, protects other parts of the steam oven, extends its service life, and avoids pollution to the external environment.
Smart Images
Figure CN119914914A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of oil fume purification, and in particular provides an oil fume purification device and a steam oven. Background Art
[0002] As people's economic well-being improves, more and more household appliances are being used in ordinary households. Steam ovens, as a common kitchen appliance, are also becoming increasingly popular. Cooking greasy ingredients in a steam oven produces a large amount of oily smoke. During the cooking process, the oily smoke is discharged into the kitchen through the steam oven's pressure relief vent. The moment the oven is opened after cooking, the accumulated oily smoke inside the oven is also discharged into the kitchen. Furthermore, since built-in steam ovens cannot be equipped with a separate range hood, the cooking environment in the kitchen is even worse. Although some commercial steam ovens are equipped with oily smoke purification devices, the modules are relatively large, making them unsuitable for home built-in steam ovens.
[0003] At present, there has been a form of installing a flue gas purification device on the built-in steam oven. However, due to the compact structure of this setting, the temperature of the oil smoke after purification cannot be dissipated in time, which in turn causes abnormal temperatures of other parts of the steam oven, and ultimately reduces the service life of these parts. What is more serious is that they directly lose their function.
[0004] Accordingly, the art needs a new oil fume purification device to solve the above problems. Summary of the Invention
[0005] The present invention aims to solve the above-mentioned technical problem, namely, to solve the problem that the existing oil fume purification device has a poor heat dissipation effect due to its compact structure. To this end, the present invention provides an oil fume purification device, which includes a fixed plate and a heat insulation channel, an exhaust channel, a purification channel, a purification module and an air supply assembly arranged on the fixed plate. The purification module is arranged in the purification channel, the air outlet of the purification channel, the air inlet of the exhaust channel and the air outlet of the heat insulation channel are all oriented towards the air supply assembly, a heat insulation member is provided between the heat insulation channel and the exhaust channel, and the air supply assembly draws air from the purification channel and the heat insulation channel and discharges the gas from the exhaust channel.
[0006] In a specific embodiment of the above-mentioned oil fume purification channel, the fixing plate forms the bottom wall of the heat insulation channel, and the fixing plate forms the top wall of the purification channel.
[0007] In a specific embodiment of the above-mentioned oil fume purification channel, a portion of the side wall of the exhaust channel is shared with a portion of the side wall of the heat insulation channel.
[0008] In a specific embodiment of the above-mentioned oil fume purification channel, there are two exhaust channels and two heat insulation channels, and the two heat insulation channels are located between the two exhaust channels.
[0009] In a specific embodiment of the above-mentioned oil fume purification channel, there is one purification channel and it is located between the two heat insulation channels.
[0010] The beneficial effect of the fume purification channel provided by the present invention is that, due to the provision of an air supply assembly, the high-temperature gas in the purification channel mixes with the low-temperature gas in the heat-insulating channel before being discharged to the outside through the exhaust channel. This arrangement significantly reduces the temperature of the purified gas and prevents the purified gas from transferring significant heat to other components during the exhaust process due to the compact overall structure of the device, thereby affecting the lifespan and function of these components.
[0011] Furthermore, a heat insulator is installed between the heat-insulating channel and the exhaust channel, which further reduces the temperature of the gas in the exhaust channel. Heat can be exchanged between the sidewalls of the heat-insulating channel's air inlet and the sidewalls of the exhaust channel's air outlet, further reducing the temperature of the gas after the fume purification process. Because the gas at the heat-insulating channel's air inlet is certainly cooler than the gas at the outlet, the heat-insulating channel prioritizes cooling the exhaust channel's air outlet, further reducing the temperature of the gas discharged from the exhaust channel.
[0012] The present invention also provides a steam oven, comprising the oil fume purification device described in any one of the above items, the steam oven also comprising a cover plate, a temperature limiter and a controller, the cover plate being arranged on the fixed plate and above the air outlet of the purification channel, the temperature limiter being arranged on the cover plate, the temperature limiter being arranged on the cover plate and electrically connected to the controller, the air inlet of the purification channel being connected to the inner cavity of the steam oven, and the fixed plate being arranged above the shell of the steam oven.
[0013] In a specific embodiment of the above-mentioned steam oven, the steam oven also includes a sealing opening and closing structure, which includes a bracket, a connecting rod, a push-up piece and a sealing gasket. The bracket is arranged on the fixed plate, and the push-up piece is arranged on the bracket. One end of the connecting rod passes through the fixed plate and is connected to the push-up piece, and the other end is connected to the sealing gasket. The sealing gasket is located in the purification channel, and the sealing gasket is opened and closed by the pushing of the push-up piece.
[0014] In a specific embodiment of the above steam oven, the sealing opening and closing structure further includes a spring, which is sleeved on the outside of the connecting rod, with one end of the spring contacting the fixing plate and the other end contacting the sealing gasket.
[0015] In a specific embodiment of the steam oven, the connecting rod passes through the portion of the fixing plate and protrudes to form a smoke collecting cavity, and the sealing gasket can be driven by the connecting rod to penetrate into the smoke collecting cavity.
[0016] In a specific embodiment of the above-mentioned steam oven, the steam oven further includes an anti-overflow channel, one end of which is connected to the outside world and the other end faces the air supply assembly, and the ejector and the connecting rod are located in the anti-overflow channel.
[0017] The steam oven provided by the present invention has the following beneficial effects: the steam oven includes the aforementioned oil fume purification device. Because the device comprises a purification channel, an exhaust channel, and a heat-insulating channel, and the air supply assembly between the three channels allows high-temperature and low-temperature gases to mix before being discharged outside the steam oven, the effect of the temperature of the purified gas itself on other components of the steam oven, particularly electrical components, is reduced. While extending the service life and ensuring functionality, the device effectively improves oil fume treatment and prevents environmental contamination. Furthermore, even when the oil fume purification device is applied to a built-in steam oven, the steam oven will not be affected by residual heat from the oil fume due to limited space. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
[0019] Figure 1 It is a structural schematic diagram of the steam oven provided by the present invention;
[0020] Figure 2 yes Figure 1 A top view of
[0021] Figure 3 This is a schematic diagram of the structure of the steam oven provided by the present invention after the air supply component is hidden;
[0022] Figure 4 It is a structural schematic diagram of the steam oven provided by the present invention at another angle;
[0023] Figure 5 This is a schematic diagram of the structure of the steam oven provided by the present invention after the heat insulation channel is hidden;
[0024] Figure 6 It is a schematic diagram of the internal structure of the steam oven provided by the present invention involving the sealed opening and closing structure.
[0025] In the figure: 10, oil fume purification device, 101, fixing plate; 102, heat insulation channel; 103, exhaust channel; 104, purification channel; 105, air supply component; 106, purification module;
[0026] 1. Steam oven; 11. Cover; 12. Temperature limiter; 13. Sealing opening and closing structure; 131. Bracket; 132. Connecting rod; 133. Ejector; 134. Sealing gasket; 135. Spring; 14. Smoke collection chamber; 15. Overflow prevention channel. DETAILED DESCRIPTION
[0027] It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are used solely for ease of description and are not intended to indicate or imply that the relevant devices or components must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, ordinal numbers such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0028] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.
[0029] like Figures 1 to 5 As shown, the present invention proposes an oil fume purification device 10, which includes a fixed plate 101 and an insulating channel 102, an exhaust channel 103, a purification channel 104, a purification module 106 and an air supply assembly 105 arranged on the fixed plate 101. The purification module 106 is arranged in the purification channel 104, and the air outlet of the purification channel 104, the air inlet of the exhaust channel 103 and the air outlet of the insulating channel 102 are all facing the air supply assembly 105. There is a thermal insulation member between the insulating channel 102 and the exhaust channel 103. The air supply assembly 105 inhales air from the purification channel 104 and the insulating channel 102 and discharges the gas from the exhaust channel 103.
[0030] In this embodiment, the oil fume purification device 10 includes a fixed plate 101, a heat-insulating channel 102, an exhaust channel 103, a purification channel 104, a purification module 106, and an air supply assembly 105. The heat-insulating channel 102 is arranged on the fixed plate 101 and provides the entire device with cool air at a relatively low temperature by means of an air supply system; the purification module 106 is arranged in the purification channel 104 and is used to decompose and purify the oil fume in the purification channel 104; the purification channel 104 is arranged on the fixed plate 101 and is used to absorb unpurified smoke and discharge purified smoke; the air supply assembly 105 is arranged on the fixed plate 101, and the air outlet of the purification channel 104 and the air outlet of the heat-insulating channel 102 are both oriented towards the air supply assembly 105, and the inlet of the exhaust channel 103 is oriented towards the air supply assembly 105. The air inlet faces the air supply component 105, which includes a fan. During the rotation process, the fan can inhale gas from the purification channel 104 and the heat-insulating channel 102, and then discharge the gas from the exhaust channel 103. Since the flue gas has a high temperature, even if the flue gas is purified, it will still contain high heat. Direct discharge of high-heat gas will pollute the surrounding environment. Therefore, with the help of the heat-insulating channel 102, low-temperature air is inhaled from the outside, and then the low-temperature air and high-temperature air are mixed, and then the non-high-temperature gas is discharged. In addition, there is a heat insulation component between the heat-insulating channel 102 and the exhaust channel 103. The heat insulation component can isolate the heat between the heat-insulating channel 102 and the exhaust channel 103, that is, the wind flowing in the heat-insulating channel 102 can isolate the heat emitted by the exhaust channel, preventing the heat from being transferred to other objects or to the outside world through the heat-insulating channel 102.
[0031] It should be specially noted that the heat insulating member may be a heat insulating board or a common wall panel forming the exhaust channel and the heat insulating channel.
[0032] Further, if Figures 1 to 5 As shown, the fixing plate 101 forms the bottom wall of the heat insulation channel 102 , and the fixing plate 101 forms the top wall of the purification channel 104 .
[0033] In this embodiment, since the oil fume purification device 10 is usually made of stainless steel in daily use, which is a heat-conducting material, in order to better transfer heat between the various channels, the fixing plate 101 is set as the bottom wall of the heat-insulating channel 102, and the fixing plate 101 is also set as the top wall of the purification channel 104. That is, in a practical model of the device, the heat-insulating channel 102 and the purification channel 104 share a connecting member, which in this utility model is the fixing plate 101.
[0034] Further, if Figures 1 to 5 As shown, a portion of the side wall of the exhaust channel 103 is shared with a portion of the side wall of the insulation channel 102 .
[0035] In this embodiment, to further improve heat transfer efficiency, a portion of the sidewalls of the exhaust channel 103 are shared with a portion of the sidewalls of the insulation channel 102. This arrangement not only saves material but also significantly improves heat conduction efficiency. Because the insulation channel 102 receives cooler gas, while the exhaust channel 103 receives warmer gas, heat from the exhaust channel 103 is transferred to the insulation channel 102, further reducing the temperature of the gas within the exhaust channel 103.
[0036] Further, if Figures 1 to 5 As shown, there are two exhaust channels 103 and two heat-insulating channels 102 , and the two heat-insulating channels 102 are located between the two exhaust channels 103 .
[0037] In this embodiment, since the oil fume purification channel 104 is usually used on the steam oven 1, in order to improve the service life of other components of the steam oven 1, especially the components located at the top, the exhaust channel 103 and the heat insulation channel 102 are usually set as two, the two heat insulation channels 102 are located between the two exhaust channels 103, and other components are located between the two heat insulation channels 102. This arrangement allows the gas that first enters the heat insulation channel 102 to preferentially take away the temperature of the components located between the two heat insulation channels 102, which provides good protection for the components.
[0038] It should be noted that even if the oil fume purification device 10 of the present invention is not used in the steam oven 1, when it is used in other household appliances, the arrangement of the exhaust duct 103 and the heat insulation duct 102 can ensure that other components operate in a relatively low temperature environment. In addition, this arrangement improves space utilization, making the household appliance using this oil fume purification device 10 compact, highly practical, and highly competitive in the market.
[0039] Further, if Figures 1 to 5 As shown, there is one purification channel 104 located between the two thermal insulation channels 102 .
[0040] In this embodiment, in order to further save space and improve the applicability of the device, one purification channel 104 is provided and located between the two heat-insulating channels 102. This arrangement is not only beneficial to the heat dissipation of the purification channel 104, but also improves the utilization of space.
[0041] The present invention provides a steam oven 1, such as Figures 1 to 5As shown, the steam oven 1 includes any of the above-mentioned oil fume purification devices 10, and the steam oven 1 also includes a cover plate 11, a temperature limiter 12 and a controller. The cover plate 11 is arranged on the fixed plate 101 and is above the air outlet of the purification channel 104. The temperature limiter 12 is arranged on the cover plate 11. The temperature limiter 12 is arranged on the cover plate 11 and is electrically connected to the controller. The air inlet of the purification channel 104 is connected to the inner cavity of the steam oven 1, and the fixed plate 101 is arranged above the shell of the steam oven 1.
[0042] In this embodiment, the steam oven 1 includes an oil fume purification device 10, a cover plate 11, a temperature limiter 12, and a controller. The cover plate 11 is mounted on a fixed plate 101 and is located above the air outlet of the purification channel 104. The temperature limiter 12 senses the temperature of the gas within the purification channel 104. When the gas temperature within the purification channel 104 is too high, the temperature limiter 12 sends a signal to the controller, which in turn stops the heating tubes within the purification module. This protective measure is particularly important for household appliances such as ovens. It not only extends the life of the appliance itself but also prevents users from being burned during use, greatly improving the product's competitiveness.
[0043] It should be noted that the function of the temperature limiter is to sense the temperature in the purification channel and then transmit the temperature to the controller of the steam oven in real time. When the temperature of the flue gas in the purification channel exceeds the set value of the temperature limiter, the temperature limiter will stop the heating tube in the purification module from working.
[0044] The steam oven provided by the present invention has the following beneficial effects: the steam oven 1 includes the aforementioned oil fume purification device 10. Since the steam oven 1 includes a purification channel 104, an exhaust channel 103, and a heat-insulating channel 102, and the air supply assembly 105 is used to achieve a mixture of high-temperature gas and low-temperature gas before exhausting it to the outside of the steam oven 1, the temperature of the purified gas itself is reduced. The impact on other components of the steam oven 1, especially the electrical components, is reduced. While extending the service life and ensuring the function, the oil fume is effectively treated and the pollution of the external environment by the oil fume is avoided. In addition, even if the oil fume purification device 10 is applied to a built-in steam oven 1, the steam oven 1 will not be disturbed by the residual heat of the oil fume due to limited space.
[0045] Further, if Figures 1 to 6 As shown, the steam oven 1 also includes a sealing opening and closing structure 13, which includes a bracket 131, a connecting rod 132, a push-up piece 133 and a sealing gasket 134. The bracket 131 is arranged on the fixed plate 101, and the push-up piece 133 is arranged on the bracket 131. One end of the connecting rod 132 passes through the fixed plate 101 and is connected to the push-up piece 133, and the other end is connected to the sealing gasket 134. The sealing gasket 134 is located in the purification channel 104, and the sealing gasket 134 is opened and closed by the pushing of the push-up piece 133.
[0046] In this embodiment, in order to ensure that the purge passage 104 can be closed in time when the temperature limiter 12 sounds an alarm, thereby preventing the temperature inside the steam oven 1 from being lost, the steam oven 1 is further provided with a sealing opening and closing structure 13. The sealing opening and closing structure 13 includes a bracket 131, a connecting rod 132, a push member 133, and a sealing gasket 134. The bracket 131 is disposed on the fixed plate 101, and the push member 133 is disposed on the fixed plate 101. One end of the connecting rod 132 passes through the bracket 131 and is connected to the push top end of the push member 133, while the other end passes through the fixed plate 101 and is connected to the sealing gasket 134. Since the push rod pushes the connecting rod 132 to move, the connecting rod 132 moves relative to both the fixed plate 101 and the bracket 131. Therefore, both the connecting rod 132 and the fixed plate 101 and the connecting rod 132 and the bracket 131 are in a sliding connection. The sealing gasket 134 is located in the purification channel 104 , and the sealing gasket 134 can open and close the purification channel 104 by being pushed by the pushing member 133 .
[0047] When the temperature limiter 12 senses that the temperature in the purge passage 104 is normal, the purge passage 104 needs to be opened to purify the oil smoke, and the sealing gasket 134 needs to be opened. When the temperature limiter 12 senses that the temperature in the purge passage 104 is too high and has reached a threshold, the purge passage 104 needs to be closed. At this time, the sealing gasket 134, under the action of the ejector 133, blocks the connection between the purge passage 104 and the inner cavity of the steam oven 1 to prevent oil smoke from entering the purge passage 104.
[0048] It's important to note that ejector 133 is a wax motor. This is a drive device consisting of a positive temperature coefficient thermistor (PTC) mounted in a sealed container filled with solid wax. Due to the inherent properties of the wax motor, when heated, the solid wax melts, which then retracts the piston rod into the body.
[0049] When the wax motor is used in the steam oven 1, since the wax motor is located on the oil fume purification device 10, the higher the temperature of the oil fume after purification, the more the solid wax melts, and the more the piston rod is retracted into the body. This will cause the sealing gasket 134 to open to a greater extent, which is more conducive to quickly dissipating the heat of the oil fume in the steam oven 1. Since the heat generated by the oil fume during the purification process will be transferred to the wax motor, the greater the heat, the more the piston rod of the wax motor is retracted, the greater the degree of opening of the sealing gasket 134, and the more heat in the oil fume is dissipated. Similarly, when the temperature of the oil fume is low, the sealing gasket 134 will open to a small extent, preventing the oil fume from escaping from the sealing opening and closing structure 13 to the outside of the steam oven 1, thereby reducing pollution to the external environment.
[0050] In addition, the wax motor can also be driven by electric drive. When electric drive is used, the wax motor is electrically connected to the controller. Under the control of the controller, the wax motor can perform corresponding actions. The precision and accuracy of this operation are relatively high.
[0051] It should be noted that the sealing opening and closing structure 13 can achieve a bidirectional sealing effect. When the sealing gasket 134 in the sealing opening and closing structure 13 is located at two different extreme positions, respectively, a sealing effect is achieved at two positions. When the ejector 133 is extended to its maximum length, the sealing gasket 134 is located at one extreme position. At this time, the sealing gasket 134 blocks the connection between the inner cavity of the steam oven 1 and the purge passage 104, achieving a seal at one position. When the ejector 133 is shortened to its minimum length, the sealing gasket 134 is located at the other extreme position. At this time, the sealing gasket 134 blocks the opening between the purge passage 104 and the top wall of the steam oven 1, achieving a seal at another position.
[0052] Further, if Figure 6 As shown, the sealing opening and closing structure 13 further includes a spring 135 , which is sleeved on the outside of the connecting rod 132 . One end of the spring 135 contacts the fixing plate 101 , and the other end contacts the sealing gasket 134 .
[0053] In this embodiment, to facilitate the resetting of sealing gasket 134, and particularly when a wax motor is used as ejector member 133, a spring 135 is sheathed around the exterior of connecting rod 132. One end of spring 135 abuts against fixed plate 101, and the other end abuts against sealing gasket 134. When oven 1 is no longer in use, the wax motor gradually cools down, causing the piston rod to gradually extend outside the oven body. While sealing gasket 134 will also reposition at this time, this will undoubtedly increase the resistance encountered by the piston rod during its extension. Once spring 135 is in place, it provides a certain degree of resetting capability, enabling sealing gasket 134 to quickly block purge passage 104, preventing external impurities from entering the interior of oven 1 through purge passage 104.
[0054] Further, if Figure 6 As shown, the connecting rod 132 passes through the portion of the fixing plate 101 to protrude to form the smoke collecting chamber 14 , and the sealing gasket 134 can be driven by the connecting rod 132 to penetrate into the smoke collecting chamber 14 .
[0055] In this embodiment, in order to facilitate the sealing of the opening and closing structure 13 , a smoke collecting chamber 14 is provided at the portion where the connecting rod 132 passes through the fixing plate 101 , that is, a portion of the fixing plate 101 protrudes upward, and the protruding portion is located in the purification channel 104 .
[0056] Further, if Figures 1 to 6As shown, the steam oven 1 further includes an anti-overflow channel 15 , one end of which is connected to the outside world and the other end faces the air supply assembly 105 . The ejector 133 and the connecting rod 132 are located in the anti-overflow channel 15 .
[0057] In this embodiment, since a sealing opening and closing structure 13 is provided in the steam oven 1, and the ejector 133 in the sealing opening and closing structure 13 is located outside the purge passage 104, while the sealing gasket 134 in the sealing opening and closing mechanism is located inside the purge passage 104, and the connecting rod 132 is connected to the ejector 133 and the sealing gasket 134, the area where the connecting rod passes through needs to be sealed. To this end, the steam oven 1 is also provided with an overflow prevention channel 15, wherein the ejector 133, the bracket 131, and the connecting rod 132 are all located in the overflow prevention channel 15, and one end of the overflow prevention channel 15 is connected to the outside world and the other end is connected to the air supply assembly 105. The air supply assembly 105 can absorb gas from the overflow prevention channel 15 and exhaust the absorbed gas from the exhaust passage 103. In this way, even if some smoke from the purge passage 104 enters and escapes through the gap between the connecting rod 132 and the fixing plate 101, it will enter the overflow prevention channel 15, preventing the smoke from scattering freely and causing damage to other parts of the steam oven 1.
[0058] It should be noted that although unpurified oil smoke may enter the outside world from the overflow prevention channel 15 and the exhaust channel 103, the smoke volume is extremely low and can be ignored. In addition, this smoke volume will never affect the safety of the user.
[0059] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.
Claims
1. A fume purification device, characterized in that: The oil fume purification device (10) comprises a fixing plate (101) and a heat-insulating channel (102), an exhaust channel (103), a purification channel (104), a purification module (106) and an air supply component (105) arranged on the fixing plate (101); the purification module (106) is arranged in the purification channel (104); the air outlet of the purification channel (104), the air inlet of the exhaust channel (103) and the air outlet of the heat-insulating channel (102) are all oriented toward the air supply component (105); a heat-insulating member is provided between the heat-insulating channel (102) and the exhaust channel (103); and the air supply component (105) exhausts gas from the exhaust channel (103) after inhaling air from the purification channel (104) and the heat-insulating channel (102).
2. The oil fume purification device according to claim 1, characterized in that: The fixing plate (101) forms the bottom wall of the heat insulation channel (102), and the fixing plate (101) forms the top wall of the purification channel (104).
3. The oil fume purification device according to claim 2, characterized in that: A portion of the side wall of the exhaust channel (103) is shared with a portion of the side wall of the heat insulation channel (102).
4. The oil fume purification device according to claim 3, characterized in that: There are two exhaust channels (103) and two heat-insulating channels (102), and the two heat-insulating channels (102) are located between the two exhaust channels (103).
5. The oil fume purification device according to claim 4, characterized in that: The purification channel (104) is one and is located between the two heat-insulating channels (102).
6. A steam oven, comprising the oil fume purification device (10) according to any one of claims 1 to 5, characterized in that: The steam oven (1) further comprises a cover plate (11), a temperature limiter (12) and a controller; the cover plate (11) is arranged on the fixed plate (101) and is located above the air outlet of the purification channel (104); the temperature limiter (12) is arranged on the cover plate (11); the temperature limiter (12) is arranged on the cover plate (11) and is electrically connected to the controller; the air inlet of the purification channel (104) is connected to the inner cavity of the steam oven (1); and the fixed plate (101) is arranged above the shell of the steam oven (1).
7. The steam oven according to claim 6, characterized in that: The steam oven (1) also includes a sealing opening and closing structure (13), which includes a bracket (131), a connecting rod (132), a push-up member (133) and a sealing gasket (134). The bracket (131) is arranged on the fixed plate (101), and the push-up member (133) is arranged on the bracket (131). One end of the connecting rod (132) passes through the fixed plate (101) and is connected to the push-up member (133), and the other end is connected to the sealing gasket (134). The sealing gasket (134) is located in the purification channel (104), and the sealing gasket (134) is opened and blocked by the pushing of the push-up member (133).
8. The steam oven according to claim 7, characterized in that: The sealing opening and closing structure (13) further comprises a spring (135), wherein the spring (135) is sleeved on the outside of the connecting rod (132), one end of the spring (135) contacts the fixing plate (101), and the other end contacts the sealing pad (134).
9. The steam oven according to any one of claims 7-8, characterized in that: The connecting rod (132) protrudes through the portion of the fixing plate (101) to form a smoke collecting chamber (14), and the sealing gasket (134) can be driven by the connecting rod (132) to penetrate into the smoke collecting chamber (14).
10. The steam oven according to claim 9, characterized in that: The steam oven (1) further comprises an anti-overflow channel (15), one end of the anti-overflow channel (15) is connected to the outside, and the other end faces the air supply assembly (105), and the ejector (133) and the connecting rod (132) are located in the anti-overflow channel (15).