Oven

Abstract

The invention relates to the technical field of ovens, in particular to an oven, and aims to solve the problem that the heat dissipation effect of the oven is poor. In order to achieve the purpose, the oven comprises an oven body, a first air inlet through hole is formed in the rear surface of the oven body; the inner container is arranged in the oven body, and a baking cavity is formed in the inner container; the draught fan assembly is arranged in the oven body and comprises a draught fan, an air inlet pipeline connected to the input end of the draught fan and an air outlet pipeline connected to the output end of the draught fan, the air inlet pipeline communicates with the baking cavity to form a first air inlet channel, and the air outlet pipeline communicates with the baking cavity to form a second air outlet channel; the input end of the draught fan is further communicated with the first air inlet through hole to form a second air inlet channel, and the air outlet pipeline is communicated with the outer space of the box body. According to the oven provided by the embodiment of the invention, the heat dissipation air duct of the oven is improved, so that heat dissipation and circulation can be effectively promoted, and the heat dissipation efficiency of the oven is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ovens, and in particular provides an oven. Background Art

[0002] With the development of science and technology, people's demand for cooking food is increasing day by day. In order to make food more caramelized and fragrant, ovens are generally used for cooking. Ovens on the market are generally rectangular frame structures, and corresponding heating structures are arranged inside the ovens to heat and bake food.

[0003] In the related art, electric ovens usually use a fan assembly to exhaust directly from the inside of the baking chamber to the outside to achieve heat dissipation of the electric oven, but such a heat dissipation method has low heat dissipation efficiency and is not conducive to the heat dissipation of the oven box and the oven circuit board. When the oven is working, the problem of the over-high temperature of the outer shell box has not been solved. Especially for built-in ovens, the heat dissipation of the oven is relatively slow. If the heat generated by the baking box cannot be dissipated in time, the heat generated inside the oven may be greater than the heat outside the oven, causing damage to the internal components of the oven. In serious cases, the oven may explode.

[0004] Accordingly, the art needs a new oven heat dissipation solution to solve the above problems. Summary of the invention

[0005] The present invention aims to solve the above technical problem, that is, to solve the problem that the existing oven has poor heat dissipation effect.

[0006] The present invention provides an oven, comprising:

[0007] The box body has a first air inlet hole disposed on its rear surface;

[0008] An inner pot is arranged in the box body, and a baking cavity is formed in the inner pot;

[0009] A fan assembly is arranged in the box body, and the fan assembly includes a fan, an air inlet duct connected to the fan input end, and an air outlet duct connected to the fan output end, wherein the air inlet duct is connected to the baking chamber to form a first air inlet channel, the fan input end is also connected to the first air inlet through hole to form a second air inlet channel, and the air outlet duct is connected to the external space of the box body.

[0010] Optionally, it also includes:

[0011] The mounting plate is arranged in the box body to divide the box body into a first chamber and a second chamber. The fan assembly is located in the first chamber, and the inner tank is located in the second chamber.

[0012] Optionally, a first air guide hole is provided at one end of the mounting plate close to the rear surface of the box body, and the first air guide hole is connected to the first air inlet hole to form the second air inlet channel.

[0013] Optionally, a first through hole is provided on the inner liner, a second through hole corresponding to the first through hole is provided on the air inlet duct, a second air guide through hole corresponding to the first through hole is provided on the mounting plate, and the first through hole, the second air guide through hole and the second through hole are connected in sequence to form the first air inlet channel.

[0014] Optionally, it also includes:

[0015] The oil fume purification device is arranged on the air inlet duct, and the gas in the baking chamber flows through the first through hole, the second air guide through hole, the oil fume purification device and the second through hole in sequence before entering the air inlet duct.

[0016] Optionally, it also includes:

[0017] A filter screen is arranged in the second air guide hole.

[0018] Optionally, a plurality of the first air guiding holes are arranged at intervals along the surface of the mounting plate.

[0019] Optionally, a second air inlet through hole is provided on the front surface of the box body, and the air inlet duct is also connected to the second air inlet through hole to form a third air inlet channel.

[0020] Optionally, a plurality of the first air inlet holes are arranged at intervals along the rear surface of the box body.

[0021] Optionally, the fan is a cross-flow fan.

[0022] The above one or more technical solutions of the present invention have at least one or more of the following Beneficial effects:

[0023] In the technical solution of the present invention, the oven provided by the embodiment of the present invention is designed with three air inlet channels, two of which are driven by fans to draw in external air to take away the heat in the box, so that the fan introduces external air through the air inlet channel and discharges the hot air through the air outlet duct, thereby quickly dissipating the heat from the oven. The other one directly draws the hot air in the baking cavity and discharges it outside the box.

[0024] The oven provided by the embodiment of the present invention can effectively promote the dissipation and circulation of heat and improve the heat dissipation efficiency of the oven by improving the heat dissipation air duct of the oven. Furthermore, when the oven is installed in a cabinet, it can not only reduce the temperature of the electrical components and the entire oven, but also continuously circulate the air in the cabinet to reduce the temperature in the cabinet, thereby ensuring the safety of the cabinet and the oven from temperature rise.

[0025] Furthermore, an oil fume purification device is provided on the air inlet duct in the embodiment of the present invention. The technical solution of setting the oil fume purification device on the air inlet duct can utilize the temperature of the gas in the air inlet duct to optimize the purification effect in the oil fume purification device and improve the purification rate of the oil fume purification device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0027] Figure 1 It is one of the partial structural cross-sectional schematic diagrams of the oven provided in the embodiment of the present invention;

[0028] Figure 2 is a cross-sectional schematic diagram of an oven provided in an embodiment of the present invention;

[0029] Figure 3 is a schematic structural diagram of a fan assembly provided in an embodiment of the present invention;

[0030] Figure 4 is a schematic structural diagram of a fan cover provided in an embodiment of the present invention;

[0031] Figure 5 is a schematic structural diagram of an oven box provided in an embodiment of the present invention;

[0032] Figure 6 is a second schematic cross-sectional view of a local structure of an oven provided in an embodiment of the present invention;

[0033] Figure 7 It is a schematic diagram of the local structure of the air inlet duct provided in an embodiment of the present invention. Reference numerals list :

[0034] 1-box body, 11-first air inlet through hole, 12-second air inlet through hole, 2-inner pot, 21 baking cavity, 22-first through hole, 31-fan, 32-air inlet duct, 321-second through hole, 33-air outlet duct, 34-fan cover, 341-partition plate, 342-mounting seat, 4-mounting plate, 41-first air guide through hole, 42-second air guide through hole, 5-oil fume purification device. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not used to limit the scope of protection of the present invention. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0036] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the relevant devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, ordinal numbers such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In some related technologies, electric ovens usually use a fan assembly to directly extract hot air from the inside of the baking chamber to achieve heat dissipation of the electric oven. However, this heat dissipation method has low heat dissipation efficiency and is not conducive to the heat dissipation of the oven box and the oven circuit board. When the oven is working, the problem of excessively high temperature of the outer shell box has not been solved.

[0039] Especially for built-in ovens, the heat dissipation of the oven is relatively slow. If the heat generated by the baking oven cannot be dissipated in time, the heat generated inside the oven may be greater than the heat outside the oven, causing damage to the internal components of the oven. In severe cases, the oven may explode.

[0040] Therefore, an embodiment of the present invention provides an oven, please refer to Figures 1 to 7 , first, if Figure 1 and 2 As shown, the oven provided in this embodiment includes a box body 1 and an inner pot 2 installed inside the box body 1, the box body 1 is used to support the overall structure of the oven, a baking cavity 21 is formed in the inner pot 2 for baking food, and a space is formed between the inner wall of the box body 1 and the outer wall of the inner pot 2 to form an air flow space, thereby providing conditions for heat dissipation around the inner pot 2.

[0041] like Figures 1 to 4As shown, a fan 31 assembly is also provided in the box 1 for use in heat dissipation after the oven processes food. The fan 31 assembly includes a fan 31, an air inlet duct 32 connected to the input end of the fan 31, and an air outlet duct 33 connected to the output end of the fan 31. The function of the fan 31 is to promote heat transfer through air flow so as to transport the heat to the outside of the box 1.

[0042] Specifically, if Figure 1 and 2 As shown, the input end of the fan 31 is located below the output end of the fan 31, the air inlet duct 32 and the air outlet duct 33 are located on the same side, and the air inlet duct 32 is located below the air outlet duct 33, and the air inlet duct 32 is arranged close to the inner tank 2. An air outlet is arranged on the front surface of the box body 1, and the air outlet duct 33 is connected to the air outlet to discharge the air in the box body 1.

[0043] Furthermore, if Figure 1 As shown, the air inlet duct 32 is connected to the baking chamber 21 to form a first air inlet channel, so that the hot air in the baking chamber can be introduced into the air inlet duct 32 under the action of the fan 31, and then discharged outside the box body 1 through the air outlet duct 33 to reduce the temperature of the oven.

[0044] Specifically, when the oven is dissipating heat after baking, the temperature inside the baking chamber 21 is very high, and the fan 31 runs and drives the air around it to circulate, forming a negative pressure at the input end of the fan 31. In this way, the air inlet duct 32 connected to the input end of the fan 31 is in a negative pressure state, so that the high-temperature gas in the baking chamber 21 enters the first air inlet channel, and is driven by the fan 31 to be discharged outside the box 1 through the air outlet duct 33, so as to reduce the heat accumulated inside the baking chamber 21.

[0045] It should be noted that the fan 31 assembly provided in the embodiment of the present invention is located in the upper part of the box body 1, and is arranged up and down with the inner tank 2. The fan 31 is close to the rear wall of the box body 1. Figure 3 and 4 As shown, a fan cover 34 is provided outside the fan 31, and a partition plate 341 is provided at the front end of the fan cover 34 to separate the fan cover 34 into two parts, the upper part of the fan cover 34 is connected with the air outlet duct 33 to form an air outlet duct, and the lower part of the fan cover 34 is connected with the air inlet duct 32 to form an air outlet duct.

[0046] Furthermore, a gap is provided between the fan cover 34 and the fan 31 mounting base 342. By providing a gap between the fan cover 34 and the fan 31 mounting base 342, the airflow can enter the input end of the fan 31 along the gap. Such a design can provide an additional air inlet for the fan 31 to increase the air intake of the fan 31, thereby providing better ventilation and heat dissipation effects for the oven.

[0047] Furthermore, if Figure 5 As shown, a first air inlet hole 11 is further provided on the rear surface of the box body 1, and an input end of the fan 31 is connected to the first air inlet hole 11 to form a second air inlet channel.

[0048] Specifically, if Figure 1 and 2 As shown, the second air inlet channel includes the space between the rear wall of the inner liner 2 and the rear wall of the box body 1, so that under the drive of the fan 31, the external air can flow through the first air inlet hole 11 through the space and enter the gap between the fan cover 34 and the fan 31 mounting seat 342, and then enter the input end of the fan 31, and then be discharged through the air outlet duct 33.

[0049] Furthermore, the inner container 2 provided in the embodiment of the present invention is spaced apart from each inner wall of the box body 1 .

[0050] Specifically, when the oven is cooling down after baking, the temperature of the outside air is lower than the temperature inside the box body 1, and the fan 31 runs and drives the air around it to circulate, forming a negative pressure at the input end of the fan 31. In this way, the second air inlet channel connected to the input end of the fan 31 is in a negative pressure state, so that the air circulates in the side, bottom and rear side areas of the oven. At the same time, the outside air enters the box body 1 through the first air inlet hole 11 and mixes with part of the hot air surrounding the inner tank 2 and the box body 1. During the gas circulation process, the heat transferred from the inner tank 2 in the corresponding area is taken away, thereby achieving cooling and heat dissipation of these areas.

[0051] In an optional embodiment, a plurality of first air inlet holes 11 are arranged at intervals along the rear surface of the box body 1 .

[0052] The plurality of first air inlet holes 11 are evenly spaced along the rear surface of the housing 1, so that the air can be evenly inlet into the oven. Specifically, these holes allow the outside air to enter the oven through the passage and mix with the hot air in the oven. The arrangement of the plurality of holes can ensure the even distribution of the air entering the oven, thereby improving the heat dissipation effect of the oven.

[0053] In an optional embodiment, a second air inlet hole 12 is further provided on the front surface of the housing 1, and the air inlet duct 32 is also connected to the second air inlet hole 12 to form a third air inlet channel. In this way, external air can also enter the air inlet duct 32 through the second air inlet hole 12, and then be discharged through the air outlet duct 33.

[0054] Specifically, when the oven is cooling down after baking, the temperature of the outside air is lower than the temperature inside the box 1, and the fan 31 runs and drives the air around it to circulate, forming a negative pressure at the input end of the fan 31. In this way, the third air inlet channel connected to the input end of the fan 31 is in a negative pressure state, and the outside air near the air inlet is sucked into the third air inlet channel and mixed with the hot air in the first air inlet channel. The outside air can absorb part of the heat to reduce the total heat of the hot air, and under the driving action of the fan 31, these mixed gases carrying heat are discharged outside the box 1 through the air outlet duct 33.

[0055] Of course, since the air inlet duct 32 is close to the inner liner 2, when the external air enters the air inlet duct 32 through the air inlet, the gas takes away the heat transferred from the top of the inner liner 2 during the circulation process, which can achieve cooling and heat dissipation of the top part of the inner liner 2.

[0056] In summary, the oven provided by the embodiment of the present invention is designed with three air inlet channels, two of which are driven by the fan 31 to draw in external air to take away the heat in the box 1, so that the fan 31 introduces external air through the air inlet channel and discharges the hot air through the air outlet duct, thereby quickly dissipating the heat from the oven. The other one directly draws the hot air in the baking cavity and discharges it outside the box 1.

[0057] The oven provided by the embodiment of the present invention can effectively promote the dissipation and circulation of heat and improve the heat dissipation efficiency of the oven by improving the heat dissipation air duct of the oven. Furthermore, when the oven is installed in a cabinet, it can not only reduce the temperature of the electrical components and the entire oven, but also continuously circulate the air in the cabinet to reduce the temperature in the cabinet, thereby ensuring the safety of the cabinet and the oven from temperature rise.

[0058] In an optional embodiment, the fan 31 adopts a cross-flow fan. The cross-flow fan 31 adopts a direct drive mode and does not require a transmission belt or belt drive, so that the fan 31 has a more compact structure and a smaller overall volume, which can further reduce the overall volume of the air duct assembly, which is beneficial to the size control of the oven.

[0059] Furthermore, since there is a lot of oil smoke in the oven environment, the cross-flow fan 31 is adopted. Based on the principle that the overall structure of the cross-flow fan 31 is simple and the number of components is relatively small, the maintenance of the cross-flow fan 31 is more convenient and quick.

[0060] Furthermore, generally, when the air inlet of the fan 31 is located above the air outlet, the fan 31 is installed in a normal manner, otherwise, the fan 31 is installed in a reverse manner. In the embodiment of the present invention, the fan 31 is installed in a reverse manner, which helps to increase the air intake volume.

[0061] In an optional embodiment, if Figure 1 ,2 As shown in Figure 6, a mounting plate 4 is also provided inside the box body 1. The mounting plate 4 is installed inside the box body 1 and is located near the upper part of the box body 1. On the one hand, the box body 1 is divided into a first chamber and a second chamber. The fan 31 assembly is located in the first chamber, and the inner tank 2 is located in the second chamber.

[0062] In this way, the mounting plate 4 divides the box body 1 into different functional areas, avoids interference between different components, effectively separates the heat dissipation and baking functions, and optimizes the heat dissipation effect and baking environment respectively, thereby improving the overall performance and use effect of the oven.

[0063] On the other hand, the mounting plate 4 serves to support the fan 31 assembly. The fan 31 can be fixed on the mounting plate 4 through the mounting seat 342. The air inlet channel of the fan 31 is formed by the upper shell of the air inlet duct 32 and the mounting plate 4. This can save parts and reduce costs while reducing the weight of the entire oven.

[0064] In an optional embodiment, if Figure 1 As shown, a first air guiding hole 41 is provided at one end of the mounting plate 4 close to the rear surface of the box body 1 , and the first air guiding hole 41 is connected to the first air inlet hole 11 to form a second air inlet channel.

[0065] It can be understood that the second air inlet channel is an air guide channel formed in the gap space between the rear wall of the box body 1 and the rear wall of the inner tank 2. The function of the air guide channel is to guide fresh external air into the second air inlet channel from the first air inlet hole 11, and then mix with the hot air in the box body 1 and enter the air outlet duct 33 through the input end of the fan 31 and then be discharged outside the box body 1.

[0066] The fresh air introduced through the air guide channel can take away the heat inside the oven, accelerate the heat dissipation and ventilation, thereby improving the heat dissipation capacity of the oven, more effectively reducing the temperature inside the oven around the outer wall of the inner tank 2, and improving the heat dissipation efficiency of the entire oven.

[0067] Furthermore, electrical components such as circuit boards are generally arranged near the rear wall of the inner tank 2. Driven by the fan 31, the second air inlet channel can accelerate the air flow more quickly, improve the heat dissipation efficiency, and reduce the heat dissipation time. In short, this solution can effectively reduce the temperature of electrical components such as circuit boards by optimizing the heat dissipation path and the flow of hot air. Lowering the temperature of components helps to improve their service life, stability and reliability, and avoid the risk of failure caused by overheating.

[0068] In an optional embodiment, if Figure 1As shown, a plurality of first air guide holes 41 are arranged at intervals along the surface of the mounting plate 4. By arranging a plurality of first air guide holes 41 at intervals on the surface of the mounting plate 4, uniformity of air flow can be achieved, thereby improving the heat dissipation effect of the oven.

[0069] In an optional embodiment, the inner pot 2, the mounting plate 4 and the air inlet duct 32 are sequentially arranged from bottom to top along the height direction of the oven, that is, the vertical direction when the oven is normally used. The top wall of the inner pot 2 is provided with a first through hole 22, the mounting plate 4 is provided with a second air guide through hole 42 corresponding to the first through hole 22, and the air inlet duct 32 is provided with a second through hole 321 corresponding to the first through hole 22. The first through hole 22, the second air guide through hole 42 and the second through hole 321 are sequentially connected to form a first air inlet channel.

[0070] It can be understood that the first air inlet channel is an air guide channel formed between the baking chamber 21 and the air inlet duct 32 in the inner pot 2 and connected to the air inlet duct 32. Since the mounting plate 4 is arranged between the inner pot 2 and the air inlet duct 32, a second air guide hole 42 is provided at a corresponding position of the mounting plate 4 so that the first air inlet channel can be connected to form an air guide channel. The function of the air guide channel is to guide the hot air inside the baking chamber 21 to enter the second air inlet channel through the first through hole 22, the second air guide through hole 42, and the second through hole 321 in sequence, and then enter the air outlet duct 33 through the input end of the fan 31 and then be discharged outside the box body 1.

[0071] In the embodiment of the present invention, a first through hole 22 is provided on the top wall of the inner pot 2, a second air guide through hole 42 corresponding to the first through hole 22 is provided on the mounting plate 4, a second through hole 321 corresponding to the first through hole 22 is provided on the air inlet duct 32, and the first through hole 22, the second air guide through hole 42 and the second through hole 321 are connected in sequence to form a first air inlet channel. Of course, the connection between the baking chamber 21 and the air inlet duct 32 can also have other forms. For example, a connecting pipe can be provided between the air inlet duct 32 and the baking chamber 21 to achieve the connection between the two.

[0072] In an optional embodiment, an oil fume purification device 5 is provided on the air inlet duct 32. Specifically, Figure 1 and 6 As shown in Figure 7, the oil fume purification device 5 is fixedly installed around the hole wall of the second through hole 321, and the oil fume purification device 5 covers the second through hole 321, so that under the drive of the fan 31, the airflow in the baking chamber 21 flows through the first through hole 22, the second air guide through hole 42, the oil fume purification device 5 and the second through hole 321 in sequence and then enters the air inlet duct 32.

[0073] It should be noted that the oil fume purification device in the oven generally adopts two methods: physical filtration or chemical filtration. The chemical filtration method is adopted in the embodiment of the present invention. Chemical filtration mainly uses chemical adsorbents to adsorb and decompose gaseous pollutants and odor substances in oil fume. Commonly used chemical adsorbents include activated carbon, oxidants, etc. These adsorbents have strong adsorption capacity and can effectively remove organic matter and gaseous pollutants in oil fume.

[0074] Generally, an increase in temperature will accelerate the adsorption rate of the adsorbent. Higher temperatures can provide more molecular kinetic energy, allowing the adsorbed substances to more easily enter the surface or pores of the adsorbent. This speeds up the adsorption reaction and increases the adsorption rate.

[0075] Therefore, the technical solution of setting the oil fume purification device 5 on the air inlet duct 32 can utilize the temperature of the gas in the air inlet duct 32 to optimize the purification effect in the oil fume purification device 5 and increase the purification rate of the oil fume purification device 5.

[0076] Furthermore, the main function of the oil fume purification device 5 is to filter and purify the oil fume, remove the grease, pollutants and odors therein, so as to maintain the cleanliness of the air inside the oven. By arranging it in the air inlet duct 32, the oil fume and odor in the baking chamber 21 can be intercepted and filtered before entering the input end of the fan 31, and the clean air re-enters the air inlet duct 32, which can reduce the pollution to the fan 31, help maintain the normal working state of the electrical components inside the fan 31, and extend the service life of the fan 31.

[0077] At the same time, the oil smoke in the baking cavity 21 is purified by the oil smoke purification device 5, which can reduce the impact of the oil smoke on the environment and users. Such a design improves the use comfort and environmental friendliness of the oven.

[0078] Furthermore, a filter is provided in the second air guide hole 42. The filter provided in the embodiment of the present invention is composed of fine meshes or fibers, and can effectively capture solid particles and grease in oil smoke.

[0079] Since the second air guide hole 42 connects the baking chamber 21 and the oil fume purification device 5 in the air inlet duct 32, the filter is set between the two. When the gas carrying oil fume passes through the filter, some larger solid particles and grease in the oil fume will be adsorbed in the filter, so that the gas carrying oil fume can be preliminarily purified, thereby indirectly improving the purification effect of the oil fume purification device 5.

[0080] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An oven, characterized in that: include: The box body has a first air inlet hole disposed on its rear surface; An inner pot is arranged in the box body, and a baking cavity is formed in the inner pot; A fan assembly is arranged in the box, and the fan assembly includes a fan, an air inlet duct connected to the fan input end, and an air outlet duct connected to the fan output end, wherein ， The air inlet duct is connected to the baking chamber to form a first air inlet channel, the fan input end is also connected to the first air inlet through hole to form a second air inlet channel, and the air outlet duct is connected to the external space of the box body.

2. The oven according to claim 1, characterized in that: Also includes: The mounting plate is arranged in the box body to divide the box body into a first chamber and a second chamber. The fan assembly is located in the first chamber, and the inner tank is located in the second chamber.

3. The oven according to claim 2, characterized in that: A first air guide hole is provided at one end of the mounting plate close to the rear surface of the box body, and the first air guide hole is connected to the first air inlet hole to form the second air inlet channel.

4. The oven according to claim 2, characterized in that: A first through hole is provided on the inner liner, a second through hole corresponding to the first through hole is provided on the air inlet duct, a second air guide through hole corresponding to the first through hole is provided on the mounting plate, and the first through hole, the second air guide through hole and the second through hole are connected in sequence to form the first air inlet channel.

5. The oven according to claim 4, characterized in that: Also includes: The oil fume purification device is arranged on the air inlet duct, and the gas in the baking chamber flows through the first through hole, the second air guide through hole, the oil fume purification device and the second through hole in sequence before entering the air inlet duct.

6. The oven according to claim 5, characterized in that: Also includes: A filter screen is arranged in the second air guide hole.

7. The oven according to claim 3, characterized in that: A plurality of the first air guiding holes are arranged at intervals along the surface of the mounting plate.

8. The oven according to claim 1, characterized in that: The front surface of the box body is provided with a second air inlet through hole, and the air inlet duct is also connected to the second air inlet through hole to form a third air inlet channel.

9. The oven according to claim 1, characterized in that: A plurality of first air inlet holes are arranged at intervals along the rear surface of the box body.

10. The oven according to any one of claims 1 to 9, characterized in that: The fan is a cross-flow fan.

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