An exhaust structure of a cooking device with steaming function and a steam-baking integrated machine

Abstract

The application relates to an exhaust structure of a cooking equipment with a steaming function and a steaming and baking integrated machine, which comprises an exhaust channel with an exhaust fan, and further comprises: a condensing channel, one end of which is in fluid communication with an exhaust port of an inner container, and the other end of which is in fluid communication with a gas guide port of the exhaust channel; and an air inlet channel, which can exchange heat with the inside of the condensing channel, and the air inlet port at one end is in communication with the outside, and the air outlet port at the other end is in fluid communication with the air inlet port of the exhaust fan. Compared with the prior art, the application does not need to additionally add a driving device, and uses the original exhaust fan of the cooking equipment to drive the air in the air inlet channel, so that the condensing efficiency of high-temperature steam is improved, meanwhile, the air in the air inlet channel enters the exhaust fan through the air inlet port, and the air volume loss of the exhaust fan is not caused, so that the exhaust efficiency of the cooking equipment is ensured.

Description

Technical Field

[0001] This invention relates to the field of cooking equipment, and more particularly to an exhaust structure for a cooking device with steaming function and a steam oven. Background Technology

[0002] Steam ovens, steam grills, and other cooking appliances with steaming functions use steam generated by a steam generator to heat food placed inside the inner pot. Excess steam is released through the vent in the inner pot. The release of large amounts of steam not only poses a risk of scalding users but also increases humidity in the kitchen, thus reducing the lifespan of other kitchen appliances and furniture. For example, there is a Chinese invention patent with patent number ZL201911348012.2 (authorization announcement number CN111053433B).

[0003] Steam condensation is the main method to reduce the amount of steam emitted, and it mainly includes two methods: air cooling and water cooling. Air cooling achieves steam condensation through heat exchange between cold air and steam, while water cooling achieves it through heat exchange between cold water and steam. For example, Chinese utility model patent ZL201820926641.3 (authorization announcement number CN 209153245 U) discloses a steam condensation structure for a steam oven, and Chinese invention patent ZL202010131634.6 (authorization announcement number CN 111329329 B) discloses a steam emission system and a cooking appliance incorporating it. However, in existing air cooling methods, the outside cold air generally exchanges heat with the steam through natural flow, resulting in low condensation efficiency. To improve condensation efficiency, an additional device to drive the cold air flow is needed, which not only increases costs but also occupies the limited installation space inside the cooking equipment. Summary of the Invention

[0004] The first technical problem to be solved by the present invention is to provide an exhaust structure for a cooking device with steaming function that has high steam condensation efficiency and does not require an additional drive device, in contrast to the prior art.

[0005] The second technical problem to be solved by the present invention is to provide an exhaust structure for a cooking device with steaming function that has high steam condensation efficiency and high exhaust efficiency, in contrast to the prior art.

[0006] The third technical problem to be solved by the present invention is to provide a steam oven with the above-mentioned exhaust structure in contrast to the prior art.

[0007] The technical solution adopted by the present invention to solve at least one of the above-mentioned technical problems is: an exhaust structure for a cooking device with a steaming function, comprising an exhaust channel with an exhaust fan, characterized in that it further comprises:

[0008] The condensation channel is fluidly connected at one end to the exhaust port of the inner liner, and at the other end to the air guide port of the aforementioned exhaust channel.

[0009] The air intake channel can exchange heat with the interior of the aforementioned condensation channel, and one end of the air intake is connected to the outside, while the other end of the air outlet is fluidly connected to the air intake of the aforementioned exhaust fan.

[0010] Furthermore, the air intake channel is located within and independent of the condensation channel. This prevents high-temperature steam in the exhaust gas from mixing into the exhaust fan and corroding its internal components, thereby affecting the fan's service life.

[0011] Furthermore, the air intake channel is disposed throughout the condensation channel, and the air inlet and outlet of the air intake channel are respectively located on the surface of the condensation channel. This allows the cold air entering the air intake channel to exchange heat effectively with the high-temperature steam in the condensation channel.

[0012] Furthermore, the direction of the air intake channel intersects the extension direction of the condensation channel at the same location. This allows the cold air entering the air intake channel to fully exchange heat with the high-temperature steam in the condensation channel.

[0013] Furthermore, the intake channel is positioned perpendicular to the extension direction of the condensation channel at its location. This allows the cold air entering the intake channel to more fully exchange heat with the high-temperature steam in the condensation channel.

[0014] Furthermore, the condensation channel includes a condensation section along its length, and the aforementioned air intake channels are spaced apart along the length of this condensation section. In this way, as the steam flows along the condensation section, it can sequentially exchange heat with the cold air in each air intake channel, more fully reducing the steam temperature and thus allowing the steam to condense completely.

[0015] Furthermore, the condensing section is annular in shape and surrounds the air inlet of the exhaust fan. This creates a negative pressure at the exhaust fan inlet, driving airflow in each intake channel and ensuring effective steam condensation in each channel. Simultaneously, air entering the exhaust fan inlet through the central hole of the condensing section condenses the air inside the condensing section. This combined external and internal cooling (each intake channel) further enhances the steam condensation effect.

[0016] Furthermore, the air inlet of the exhaust fan is circular, and the condensation section of the aforementioned condensation channel is also circular in shape and matches the air inlet. The condensation section is positioned along the edge of the air inlet, and the air inlets and outlets of each air intake channel on the condensation section are exposed. This allows the negative pressure formed at the air inlet of the exhaust fan to better drive the gas flow in each air intake channel. Moreover, by discharging air through the air inlets and outlets of each air intake channel, air can flow smoothly within each air intake channel and smoothly flow into the exhaust fan through the air inlet.

[0017] Furthermore, the exhaust fan includes a volute casing, with the air inlet of the exhaust fan located on the volute casing. The condensation channel includes a condenser tube constituting the condensation section, and the outer end face of the volute casing is provided with a mounting base for installing the condenser tube. This simplifies the structure of the condensation channel, and the air inlet at the central hole of the condensation section effectively cools the condenser tube, thereby better cooling the steam in the condensation section. Simultaneously, the mounting base ensures a stable installation of the condenser tube.

[0018] Furthermore, the volute casing is horizontally arranged, and the air inlet is located on the top wall of the volute casing. The condenser tube is detachably installed circumferentially in the mounting base, with its bottom surface suspended. The air inlets of each air intake channel are located on the top wall of the condenser tube, while the air outlets are located on the bottom wall of the condenser tube. This facilitates the assembly and disassembly of the condenser tube and the mounting base, and allows outside cold air to smoothly enter through the air inlets of each air intake channel and flow out through the corresponding air outlets, thus controlling the air intake of the air intake and exhaust fan.

[0019] Furthermore, the mounting base includes a ring-shaped mounting groove for embedding the aforementioned condenser tube, and the inner top surface of the mounting groove is provided with circumferentially spaced support blocks for supporting the condenser tube and suspending its bottom. The mounting groove enables detachable installation of the condenser tube and the mounting base, while the support blocks ensure the bottom of the condenser tube remains suspended.

[0020] Furthermore, the mounting base includes a horizontally extending, annular body. The outer edge of the body extends vertically upward in the circumferential direction to form a baffle, while the inner edge is provided with vertically extending blocks at intervals in the circumferential direction. The blocks, the body, and the baffle form the mounting groove. This simplifies the mounting base structure and allows for a better mounting groove structure.

[0021] Furthermore, the mounting base is detachably connected to the aforementioned volute cover, facilitating the assembly and disassembly of the mounting base and the exhaust fan.

[0022] Furthermore, the inner side of the mounting base is provided with guide openings extending along the length of the base in a circumferentially spaced manner. On the top surface of the volute cover, guide blocks corresponding to the guide openings are provided at circumferentially spaced intervals at the edge of the air inlet. Each guide block is vertically arranged and extends along the length of the base, with the lower end of each guide block being shorter than the length of its corresponding guide opening. The upper ends of the same side of each guide block extend along the length of the base to form an extending arc block. Each extending arc block and the upper end of the guide block it belongs to respectively constitute the support block.

[0023] With the mounting base and volute cover installed, the lower ends of each guide block are inserted into their respective guide openings, and the edges of the same end of each guide opening are engaged between the lower end of the corresponding guide block and its extended arc block. This allows for easy assembly and disassembly of the mounting base and volute cover through insertion and fitting, while the limiting effect of each extended arc block ensures the mounting base is stably mounted on the volute cover.

[0024] Furthermore, the condensation channel also includes a steam inlet section with one end fluidly connected to the exhaust port of the inner liner and a steam outlet section with one end fluidly connected to the air guide port of the exhaust channel. The condensation section has a steam inlet and an outlet, with the steam inlet fluidly connected to the other end of the steam inlet section and the steam outlet fluidly connected to the other end of the steam outlet section. In this way, the exhaust steam in the inner liner enters the condensation section through the steam inlet section, is fully condensed in the condensation section, and the remaining gas flows out through the steam outlet section and then enters the exhaust channel for external discharge.

[0025] Furthermore, the steam inlet and outlet are respectively located on both sides of the aforementioned condensation section. This maximizes the flow distance of steam within the condensation section, thereby ensuring thorough condensation of the steam.

[0026] Furthermore, the steam inlet and outlet extend tangentially along the condensation section. This ensures that when the condensed steam enters the outlet and when the condensed steam exits the outlet, it collides with the inner wall of the condensation section, condensing the steam through this collision and further reducing the amount of steam discharged.

[0027] Furthermore, the opening directions of both the steam inlet and outlet are towards the same side of the condensing section, and the airflow direction in the steam inlet is nearly parallel to the airflow direction in the steam outlet. This further extends the flow distance of steam in the condensing section and allows the steam to flow smoothly within the condensing section, maximizing the residence time of steam in the condensing section while ensuring exhaust efficiency.

[0028] The technical solution adopted to further solve the third technical problem mentioned above is: a steam oven, characterized in that it has the exhaust structure of a cooking device with steaming function as described above.

[0029] Compared with the prior art, the advantages of this invention are as follows: During the operation of the cooking equipment, the negative pressure generated by the rotation of the exhaust fan drives the steam in the inner pot to be discharged from the exhaust port through the condensation channel and the exhaust channel in sequence. At the same time, the air inlet of the air inlet channel is connected to the outside, while the air outlet is fluidly connected to the air inlet of the exhaust fan. In this way, the negative pressure generated by the rotation of the exhaust fan can simultaneously drive cold air from the outside into the air inlet channel, and exchange heat with the high-temperature steam inside the condensation channel, causing the steam to condense, reducing the amount of steam discharged, and lowering the temperature of the discharged gas.

[0030] Compared with the prior art, the present invention does not require the addition of a drive device. It uses the original exhaust fan of the cooking equipment to drive the air in the air intake channel, thereby improving the condensation efficiency of high-temperature steam. At the same time, the air in the air intake channel enters the exhaust fan through the air inlet, which will not cause the exhaust fan to lose air volume and ensure the exhaust efficiency of the cooking equipment. Attached Figure Description

[0031] Figure 1 This is a cross-sectional view of the steam oven in an embodiment of the present invention;

[0032] Figure 2 This is a partial structural diagram of the steam oven in an embodiment of the present invention (the top and back panels of the oven are omitted);

[0033] Figure 3 This is a partial exploded view of the steam oven in an embodiment of the present invention;

[0034] Figure 4 for Figure 3 Enlarged view of section A;

[0035] Figure 5 This is a schematic diagram of the condenser tube in an embodiment of the present invention;

[0036] Figure 6 for Figure 5 A schematic diagram of the structure from another direction;

[0037] Figure 7 This is a cross-sectional view of the condenser tube in an embodiment of the present invention;

[0038] Figure 8 This is a cross-sectional view of the condenser tube from another direction in an embodiment of the present invention;

[0039] Figure 9 This is an exploded view of another partial structure of the steam oven in this embodiment of the invention;

[0040] Figure 10 for Figure 9 Enlarged view of section B. Detailed Implementation

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this invention can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0043] like Figures 1-10 As shown, a steam oven includes an inner cavity 1 and an exhaust structure, the exhaust structure including an exhaust channel 30 with an exhaust fan 4. Specifically, in this embodiment, an upper mounting plate 2 is horizontally arranged above the inner cavity 1, and a guide plate 3 is provided on the upper surface of the upper mounting plate 2. The guide plate 3 and the upper surface of the upper mounting plate 2 form the exhaust channel 30. Furthermore, the exhaust fan 4 is a centrifugal fan and is installed at the air inlet of the exhaust channel 30. Figure 1 As shown.

[0044] Furthermore, such as Figure 8As shown, the system also includes a condensation channel 50 and an air intake channel 60. One end of the condensation channel 50 is fluidly connected to the exhaust port 11 of the inner liner 1, and the other end is fluidly connected to the air inlet 31 of the exhaust channel 30. The air intake channel 60 can exchange heat with the interior of the condensation channel 50. One end of the air intake channel 60 is an air inlet 61, and the other end is an air outlet 62. The air inlet 61 of the air intake channel 60 is connected to the outside, while the air outlet 62 is fluidly connected to the air inlet 40 of the exhaust fan 4. During the operation of the cooking equipment (steaming function), the negative pressure generated by the rotation of the exhaust fan 4 drives the steam in the inner liner 1 to be discharged from the exhaust port 11 through the condensation channel 50 and the exhaust channel 30 in sequence. Meanwhile, the air inlet 61 of the air intake channel 60 is connected to the outside, while the air outlet 62 is fluidly connected to the air inlet 40 of the exhaust fan 4. This negative pressure generated by the rotation of the exhaust fan 4 simultaneously drives cold outside air into the air intake channel 60, where it exchanges heat with the high-temperature steam inside the condensation channel 50, causing the steam to condense, reducing the amount of exhaust steam, and lowering the temperature of the exhaust gas. Compared with existing technologies, this invention eliminates the need for an additional drive device, utilizing the existing exhaust fan 4 of the cooking equipment to drive the air in the air intake channel 60, thereby improving the condensation efficiency of the high-temperature steam. Simultaneously, the air in the air intake channel 60 enters the exhaust fan 4 through the air inlet 40, preventing any loss of airflow from the exhaust fan 4 and ensuring the exhaust efficiency of the cooking equipment.

[0045] Preferably, such as Figure 8 As shown, the aforementioned air intake channel 60 is disposed within and independent of the condensing channel 50. This prevents high-temperature steam in the exhaust gas from mixing into the exhaust fan 4 and corroding its internal components, thereby affecting the service life of the exhaust fan 4. Furthermore, preferably, the air intake channel 60 is disposed throughout the condensing channel 50, with its inlet 61 and outlet 62 located on the surface of the condensing channel 50, allowing the cold air entering the air intake channel 60 to exchange heat effectively with the high-temperature steam in the condensing channel 50. More preferably, the direction of the air intake channel 60 intersects the extension direction of the condensing channel 50 where it is located, allowing the cold air entering the air intake channel 60 to fully exchange heat with the high-temperature steam in the condensing channel 50. Even more preferably, the direction of the air intake channel 60 is perpendicular to the extension direction of the condensing channel 50 where it is located, allowing the cold air entering the air intake channel 60 to exchange heat even more fully with the high-temperature steam in the condensing channel 50.

[0046] Furthermore, in this embodiment, as Figure 8As shown, the condensation channel 50 includes a condensation section 501 along its length, and the air intake channels 60 are spaced apart along the length of the condensation section 501. This allows the steam to exchange heat sequentially with the cold air in each air intake channel 60 as it flows along the condensation section 501, thus more effectively reducing the steam temperature and enabling thorough condensation. Preferably, the condensation section 501 is annular and surrounds the air inlet 40 of the exhaust fan 4. The negative pressure formed at the air inlet 40 of the exhaust fan 4 drives the air flow in each air intake channel 60, ensuring the condensation effect of each air intake channel 60 on the steam. Simultaneously, the air entering the air inlet 40 of the exhaust fan 4 through the central hole of the condensation section 501 condenses the air inside the condensation section 501. The combined effect of external cooling and internal cooling (each air intake channel 60) further enhances the condensation effect on the steam. Specifically, the air inlet 40 of the exhaust fan 4 is circular, and the condensation section 501 of the condensation channel 50 is also circular and matches the air inlet 40. The condensation section 501 is arranged along the edge of the air inlet 40, and the air inlet 61 and air outlet 62 of each air intake channel 60 on the condensation section 501 are exposed. This allows the negative pressure formed at the air inlet 40 of the exhaust fan 4 to better drive the gas flow in each air intake channel 60, and the air is discharged through the air inlet 61 and air outlet 62 of each air intake channel 60, allowing air to flow smoothly in each air intake channel 60 and smoothly flow into the exhaust fan 4 through the air inlet 40.

[0047] In this embodiment, the exhaust fan 4 includes a horizontally arranged volute cover 41 and an impeller 42 installed in the volute cover 41. The air inlet 40 of the exhaust fan 4 is opened on the top wall of the volute cover 41. When the impeller 42 is rotating, a negative pressure is formed at the air inlet 40. The condensation channel 50 includes a condenser tube 51 constituting the condensation section 501, and the outer end face of the volute cover 41 is provided with a mounting seat 8 for installing the condenser tube 51. This simplifies the structure of the condensation channel 50, and the air inlet at the center hole of the condensation section 501 can better cool the condenser tube 51, thereby better cooling the steam in the condensation section 501. At the same time, the mounting seat 8 can achieve a stable installation of the condenser tube 51. Preferably, as shown in the figure... Figure 7 As shown, the top and bottom walls of the condenser tube 51 are both horizontally extending annular walls, while the inner and outer walls are both arc walls. At the same time, vertically extending air inlets 6 are interspersed in the condenser tube 51 along the circumferential direction. The spacing between adjacent air inlets 6 is equal, and the inner cavity of each air inlet 6 forms an air intake channel 60.

[0048] Furthermore, the aforementioned condenser tube 51 is detachably installed in the mounting base 8 along the circumferential direction, and the bottom surface of the condenser tube 51 is suspended. The air inlets 61 of each air inlet channel 60 are respectively opened on the top wall of the condenser tube 51, while the air outlets 62 are respectively opened on the bottom wall of the condenser tube 51. This facilitates the assembly and disassembly of the condenser tube 51 and the mounting base 8, and allows outside cold air to smoothly enter through the air inlets 61 of each air inlet channel 60 and flow out through the corresponding air outlets 62, thus entering the air inlet 40 of the exhaust fan 4. Preferably, as shown... Figure 4 As shown, the mounting base 8 includes a ring-shaped mounting groove 80 for embedding the condenser tube 51. Support blocks 85 are provided at circumferential intervals on the inner top surface of the mounting groove 80 to support the condenser tube 51 and suspend its bottom. The mounting groove 80 enables detachable installation of the condenser tube 51 to the mounting base 8, while the support blocks 85 ensure the bottom of the condenser tube 51 is suspended. Specifically, in this embodiment, the mounting base 8 includes a horizontally extending, ring-shaped base 81. The outer edge of the base 81 extends vertically upwards circumferentially to form a baffle wall 82, while the inner edge is provided at circumferential intervals with vertically extending baffle blocks 83. Each baffle block 83, the base 81, and the baffle wall 82 together form the mounting groove 80, thus simplifying the structure of the mounting base 8 and effectively forming the mounting groove 80.

[0049] Furthermore, the aforementioned mounting base 8 is detachably connected to the aforementioned volute cover 41, facilitating the assembly and disassembly of the mounting base 8 and the exhaust fan 4. Specifically, as shown... Figure 4 As shown, the inner side of the base 81 of the mounting base 8 is provided with guide openings 86 that extend along the length of the base 81 at circumferential intervals. On the top surface of the volute cover 41, guide blocks 84, corresponding to the guide openings 86, are circumferentially protruding at the edge of the air inlet 40. Each guide block 84 is vertically arranged and extends along the length of the base 81, with the lower end of each guide block 84 being shorter than the length of its corresponding guide opening 86. The upper ends of the same side of each guide block 84 extend along the length of the base 81 to form an extension arc block 841. Each extension arc block 841 and the upper end of its corresponding guide block 84 constitute the support block 85. When the mounting base 8 and volute cover 41 are installed, the lower ends of each guide block 84 are inserted into their corresponding guide openings 86, and the edges of the same end of each guide opening 86 are engaged between the lower end of the corresponding guide block 84 and its extension arc block 841. On the one hand, the mounting base 8 and the volute cover 41 can be disassembled and assembled by plugging and fitting; on the other hand, the mounting base 8 can be stably set on the volute cover 41 by the limiting of each extended arc block 841. In this embodiment, the above-mentioned baffle 82 corresponds one-to-one with the above-mentioned guide port 86, and is respectively set on the inner side of the corresponding guide port 86.

[0050] Furthermore, in this embodiment, the condensation channel 50 further includes a steam inlet section 502 with one end fluidly connected to the exhaust port 11 of the inner liner 1 and a steam outlet section 503 with one end fluidly connected to the air guide port 31 of the exhaust channel 30. The condensation section 501 is provided with a steam inlet 5011 and a steam outlet 5012, wherein the steam inlet 5011 is fluidly connected to the other end of the steam inlet section 502, and the steam outlet 5012 is fluidly connected to the other end of the steam outlet section 503. Thus, the exhaust steam in the inner liner 1 enters the condensation section 501 through the steam inlet section 502, is fully condensed in the condensation section 501, and the remaining gas flows out through the steam outlet section 503, then enters the exhaust channel 30 for discharge. Preferably, the steam inlet 5011 and the steam outlet 5012 are respectively located on both sides of the condensation section 501, thereby maximizing the flow distance of the steam in the condensation section 501 and ensuring sufficient condensation of the steam. Furthermore, such as Figure 8 As shown, the steam inlet 5011 and steam outlet 5012 extend along the tangential direction of the condensing section 501. In this way, when the condensed steam enters the steam outlet 5012 and when the condensed steam flows out of the steam outlet 5012, it can collide with the inner wall surface of the condensing section 501, using the collision to condense the steam, thereby further reducing the amount of steam discharged.

[0051] In addition, such as Figure 8 As shown, the opening directions of the steam inlet 5011 and the steam outlet 5012 are both facing the same side of the condensing section 501, and the airflow direction in the steam inlet 5011 is nearly parallel to the airflow direction in the steam outlet 5012. This further extends the flow distance of steam in the condensing section 501 and allows the steam to flow smoothly in the condensing section 501, maximizing the residence time of steam in the condensing section 501 while ensuring exhaust efficiency. In this embodiment, the steam inlet section 502 of the condensing channel 50 is formed by the inner cavity of the steam inlet pipe 52, and the steam outlet section 503 is formed by the inner cavity of the steam outlet pipe 53. One end of the steam inlet pipe 52 is connected to the exhaust port 11 of the inner liner 1 through the exhaust pipe 71, and the other end is connected to the steam inlet 5011 of the condensing pipe 51. One end of the aforementioned steam outlet pipe 53 is connected to the steam outlet 5012 of the condenser section 501, while the other end is connected to the air guide port 31 of the aforementioned exhaust channel 30 via the air guide pipe 72. Furthermore, the distance between the aforementioned steam inlet pipe 52 and steam outlet pipe 53 increases outward from the condenser pipe 51, thereby guiding the gas in the condenser pipe 51 to the left and right, allowing the airflow to flow smoothly from the steam inlet 5011 to the steam outlet 5012. In this embodiment, the aforementioned air guide port 31 is located on the top wall of the air guide plate 3 and in the air inlet of the exhaust channel 30, thereby allowing the remaining steam discharged into the exhaust channel 30 to be quickly discharged.

[0052] The term "fluid connectivity" as used in this invention refers to the spatial relationship between two components or parts (hereinafter referred to as the first part and the second part, respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow from the first part along a flow path and / or be transported to the second part. This can be a direct connection between the first part and the second part, or an indirect connection between the first part and the second part through at least one third party. This third party can be a fluid channel such as a pipe, channel, conduit, guide, hole, or groove, or a chamber that allows fluid to flow through, or a combination of the above.

Claims

1. An exhaust structure of a cooking apparatus having a steaming function, comprising an exhaust passage (30) having an exhaust fan (4), characterized in that, Also included are: a condensing passage (50) in fluid communication at one end with the exhaust port (11) of the inner container (1) and at the other end with the air guide port (31) of the exhaust passage (30); an air inlet passage (60) capable of heat exchange with the interior of the condensing passage (50) and having an air inlet port (61) in fluid communication at one end with the exterior and an air outlet port (62) in fluid communication at the other end with the air inlet port (40) of the exhaust fan (4); The air inlet passage (60) is arranged in the condensing passage (50) and is independent of the condensing passage (50).

2. The exhaust structure of a cooking apparatus with a steaming function according to claim 1, wherein The air inlet passage (60) is arranged in the condensing passage (50) and the air inlet port (61) and the air outlet port (62) of the air inlet passage (60) are respectively arranged on the surface of the condensing passage (50).

3. The exhaust structure of a cooking apparatus with a steaming function according to claim 2, wherein The air inlet passage (60) is arranged in the direction of the extension of the condensing passage (50) at the location where it is arranged.

4. The exhaust structure of a cooking apparatus with a steaming function according to claim 3, wherein The air inlet passage (60) is arranged in the direction of the extension of the condensing passage (50) at the location where it is arranged.

5. The exhaust structure of a cooking apparatus with steaming function according to any one of claims 2 to 4, characterized in that, The condensing passage (50) includes a condensing section (501) along the length direction, and the air inlet passage (60) is arranged on the condensing section (501) along the length direction of the condensing section (501).

6. The exhaust structure of a cooking apparatus with a steaming function according to claim 5, wherein The condensing section (501) is annular and surrounds the air inlet port (40) of the exhaust fan (4).

7. The exhaust structure of a cooking apparatus with a steaming function according to claim 6, wherein The air inlet port (40) of the exhaust fan (4) is circular, the condensing section (501) of the condensing passage (50) is also circular and matches the air inlet port (40), the condensing section (501) is arranged along the air inlet port (40), and the air inlet port (61) and the air outlet port (62) of each air inlet passage (60) on the condensing section (501) are exposed.

8. The exhaust structure of a cooking apparatus with a steaming function according to claim 7, wherein The exhaust fan (4) includes a volute cover (41), the air inlet port (40) of the exhaust fan (4) is arranged on the volute cover (41), the condensing passage (50) includes a condensing pipe (51) constituting the condensing section (501), and the outer end surface of the volute cover (41) is provided with a mounting seat (8) for mounting the condensing pipe (51).

9. The exhaust structure of a cooking apparatus with a steaming function according to claim 8, wherein The volute cover (41) is horizontally arranged, the air inlet port (40) is arranged on the top wall of the volute cover (41), the condensing pipe (51) is detachably arranged in the mounting seat (8) along the circumferential direction, the bottom surface of the condensing pipe (51) is suspended, the air inlet port (61) of each air inlet passage (60) is arranged on the top wall of the condensing pipe (51), and the air outlet port (62) is arranged on the bottom wall of the condensing pipe (51).

10. The exhaust structure of a cooking apparatus having a steaming function according to claim 9, wherein The mounting seat (8) includes a mounting groove (80) in the shape of a circular ring for embedding the condensing pipe (51), and the inner top surface of the mounting groove (80) is provided with support blocks (85) for supporting the condensing pipe (51) and suspending the bottom of the condensing pipe (51) along the circumferential direction.

11. The exhaust structure of a cooking apparatus having a steaming function according to claim 10, wherein The mounting seat (8) comprises a seat body (81) extending horizontally and in a circular ring shape, an outer side edge of the seat body (81) extends vertically upward along the circumference to form a blocking wall (82), and an inner side edge is spaced apart and protrudes vertically extending blocking blocks (83) along the circumference, each blocking block (83) and the seat body (81) and the blocking wall (82) form the mounting groove (80).

12. The exhaust structure of a cooking apparatus having a steaming function according to claim 11, wherein The mounting seat (8) is detachably connected with the volute cover (41).

13. The exhaust structure of a cooking apparatus having a steaming function according to claim 12, wherein The inner side of the seat body (81) of the mounting seat (8) is spaced apart and provided with guide openings (86) extending along the length direction of the seat body (81) along the circumference, and the top surface of the volute cover (41) is spaced apart and protrudes along the circumference at the opening of the air inlet (40), and the guide blocks (84) corresponding to the guide openings (86) are protruded, each guide block (84) is vertically arranged and extends along the length direction of the seat body (81), and the length of the lower end of each guide block (84) is less than the length of the corresponding guide opening (86), and the upper end of the same side extends along the length direction of the seat body (81) to form an extension arc block (841), and each extension arc block (841) and the upper end of the guide block (84) where it is located form the support block (85), In the mounted state of the mounting seat (8) and the volute cover (41), the lower end of each guide block (84) is inserted into the corresponding guide opening (86), and the opening edge of the same end of each guide opening (86) is clamped between the lower end of the corresponding guide block (84) and the extension arc block (841) thereof.

14. The exhaust structure of a cooking apparatus having a steaming function according to claim 7, wherein The condensing passage (50) further comprises an inlet steam section (502) in fluid communication with the exhaust port (11) of the inner container (1) and an outlet steam section (503) in fluid communication with the air guide port (31) of the exhaust passage (30), and the condensing section (501) is respectively provided with an inlet steam port (5011) and an outlet steam port (5012), wherein the inlet steam port (5011) is in fluid communication with the other end of the inlet steam section (502), and the outlet steam port (5012) is in fluid communication with the other end of the outlet steam section (503).

15. The exhaust structure of a cooking apparatus having a steaming function according to claim 14, wherein The inlet steam port (5011) and the outlet steam port (5012) are respectively arranged on both sides of the condensing section (501).

16. The exhaust structure of a cooking apparatus having a steaming function according to claim 15, wherein The inlet steam port (5011) and the outlet steam port (5012) respectively extend along the tangent direction of the condensing section (501).

17. The exhaust structure of a cooking apparatus having a steaming function according to claim 16, wherein The opening directions of the inlet steam port (5011) and the outlet steam port (5012) are both towards the same side of the condensing section (501), and the flow direction of the gas flow in the inlet steam port (5011) is close to parallel to the flow direction of the gas flow in the outlet steam port (5012).

18. A combination steaming and toasting machine characterized by, An exhaust structure of a cooking device with a steaming function as claimed in any one of claims 1 to 17.

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