Exhaust system and cooking utensil

Abstract

The invention relates to an exhaust system and a cooking utensil, which can lengthen an exhaust path so as to prevent water drops from being discharged while reducing potential safety hazards, thereby being beneficial to protecting a cabinet. The exhaust system comprises a mounting plate, an exhaust pipe and an exhaust pipe, wherein the mounting plate is arranged above a liner; the air guide plate group is provided with an air guide rear section which is close to the mounting plate and is used for communicating with the inner container, an air guide front section which is far away from the mounting plate and is provided with an air outlet, and an air guide transition section which obliquely upwards extends from the air guide rear section to the air guide front section, so that an air guide channel with a Z-shaped structure is formed in the air guide plate group; the fan is installed on the air guide rear section of the air guide plate set and used for sucking out air from the inner container and then exhausting the air through the air guide channel.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen appliances, and particularly to an exhaust system and a cooking appliance. Background Art

[0002] With the improvement of people's living standards, cooking appliances such as steam ovens, ovens, steam and convection ovens, steam and microwave ovens, and steam, convection and microwave ovens have become essential household appliances in modern kitchen appliances. Currently, such cooking appliances on the market are usually equipped with a flat air guide system, that is, an air guide plate and a fan are installed on the mounting plate above the inner cavity, and the inner cavity is connected through a metal pipe or a rubber pipe. Thus, during cooking, the water vapor and / or hot air in the inner cavity will be discharged forward to the outside through the air guide plate under the negative pressure of the fan.

[0003] However, the air guide path of this flat air guide system is often relatively short, and the temperature of the discharged water vapor and / or hot air is relatively high, which not only has certain safety hazards, but also is likely to directly carry out water droplets during the steaming process, easily damaging the cabinet. In addition, a water tank for supplying water to the inner cavity is usually provided on the mounting plate above the inner cavity. Since the height of the water tank is usually much higher than the height of the air guide plate, such cooking appliances usually have to be provided with a split door body that affects the appearance, that is, a lower door body that closes the opening of the inner cavity and an upper door body that is arranged at an interval from the lower door body and is used to block the water tank and the fan, so that the water vapor and / or hot air discharged through the air guide plate are discharged through the gap between the upper and lower door bodies. Summary of the Invention

[0004] Aiming at the problems that the air guide path of the existing flat air guide system is often relatively short, the temperature of the discharged water vapor and / or hot air is relatively high, which not only has certain safety hazards, but also is likely to directly carry out water droplets during the steaming process, easily damaging the cabinet; the present application provides an exhaust system and a cooking appliance, which can lengthen the exhaust path to reduce safety hazards while preventing water droplets from being discharged, which is beneficial to protecting the cabinet.

[0005] According to an embodiment of the present application, the present application provides an exhaust system, including:

[0006] A mounting plate for being arranged above the inner cavity;

[0007] An air guide plate group having an air guide rear section close to the mounting plate and used for communicating with the inner cavity, an air guide front section far from the mounting plate and having an air outlet, and an air guide transition section obliquely extending upward from the air guide rear section to the air guide front section, so as to form an air guide channel with a Z-shaped structure in the air guide plate group; and

[0008] A fan installed in the air guide rear section of the air guide plate group for first sucking out gas from the inner cavity and then discharging it through the air guide channel.

[0009] In one embodiment of the present application, the air guide plate group includes a lower air guide plate installed above the mounting plate and an upper air guide plate arranged at an interval from the lower air guide plate, so as to form the air guide channel between the lower air guide plate and the upper air guide plate; the lower air guide plate and the mounting plate are mutually attached at the rear section of the air guide, and the lower air guide plate and the mounting plate are mutually separated at the front section of the air guide.

[0010] In one embodiment of the present application, the exhaust system further includes a water tank for communicating with the inner tank, and the water tank is arranged in the installation space between the lower air guide plate and the mounting plate.

[0011] In one embodiment of the present application, the water tank is slidably inserted into the installation space between the lower air guide plate and the mounting plate; and when the water tank is inserted into the installation space between the lower air guide plate and the mounting plate, the water tank is thermally conductive and abuts against the lower air guide plate.

[0012] In one embodiment of the present application, the lower air guide plate is bent at the connection between the rear section of the air guide and the transition section of the air guide to form a fold angle, and the lower air guide plate satisfies the following relational expression:

[0013]

[0014] In the formula: v1 is the direction vector of the lower air guide plate at the rear section of the air guide; v2 is the direction vector of the lower air guide plate at the transition section of the air guide.

[0015] In one embodiment of the present application, the lower air guide plate further satisfies the following relational expression:

[0016] x 2 +y 2 >1150 2 ;

[0017] In the formula: x and y are respectively the abscissa and ordinate of the bending point of the lower air guide plate in the fan coordinate system.

[0018] In one embodiment of the present application, the upper air guide plate is bent at the connection between the rear section of the air guide and the transition section of the air guide to form a first rounded corner, and the upper air guide plate satisfies the following relational expression:

[0019] C1(t) = (r1cost, r1sint), t ∈ [0, θ1]);

[0020] In the formula: C1(t) is the rounded corner function of the upper air guide plate; r1 is the rounded corner radius of the upper air guide plate, and r1 ≥ 10 mm; θ1 is the first rounded corner of the upper air guide plate.

[0021] In one embodiment of the present application, the lower air deflector is bent at the connection between the air guiding transition section and the air guiding front section to form a second rounded corner, and the lower air deflector satisfies the following relational expression:

[0022] C2(t) = (2r1cost, 2r1sint), t ∈ [0, θ2] (4);

[0023] Wherein: C2(t) is the rounded corner function of the lower air deflector; r1 is the rounded corner radius of the upper air deflector; θ2 is the second rounded corner of the lower air deflector.

[0024] In one embodiment of the present application, the air deflector group satisfies the following relational expression:

[0025]

[0026] H = 4h;

[0027] Wherein: f(X) is the height distribution function of the air guiding channel along the extending direction; h is the front end height of the air guiding channel; L is the extending length of the air guiding channel; H is the rear end height of the air guiding channel.

[0028] In one embodiment of the present application, the air deflector group further includes a pair of intermediate air deflectors located between the lower air deflector and the upper air deflector, wherein the two intermediate air deflectors are located in the air guiding front section, and the two intermediate air deflectors extend away from each other from the rear to the front to the air outlet to form a V-shaped flow splitter.

[0029] In one embodiment of the present application, the exhaust system further includes a decorative strip, wherein the decorative strip is installed on the air deflector group and is located in front of the air guiding front section, and the decorative strip has a flared opening communicating with the air outlet; the exhaust system further includes a condenser assembly, and the condenser assembly is used to be arranged in the pipeline between the inner container and the air deflector group.

[0030] According to another aspect of the present application, one embodiment of the present application further provides a cooking device, including:

[0031] A box body;

[0032] An inner container arranged inside the box body;

[0033] A door body arranged on the box body to open or close the opening of the inner container; and

[0034] The exhaust system according to any one of the above, wherein the exhaust system is located above the inner container and is communicated with the inner container.

[0035] In summary, since the air deflector group of the present application can provide an air guiding channel with a Z-shaped structure, the effective exhaust path of the exhaust system of the present application is increased by about one-third, so that the hot air flow (water vapor and / or hot air) sucked out from the inner tank can be fully mixed with the cold air sucked in from the outside in the air guiding channel, in order to reduce the temperature of the air flow discharged from the air outlet. At the same time, since the air flow needs to climb when flowing through the obliquely upward extending air guiding transition section, the water droplets in the air flow will flow back along the air guiding transition section under the action of gravity, which helps to prevent the water droplets from being discharged. In other words, the exhaust system 1 of the present application not only lengthens the exhaust path through the Z-shaped channel, solves the problem that the high-temperature and low-temperature air flows of the flat air guiding system cannot be fully mixed, reduces the temperature of the air outlet, and reduces potential safety hazards, but also prevents the water droplets from being discharged through the slope (i.e., the air guiding transition section) in the Z-shaped channel, in order to solve the problem that the flat air guiding system is prone to water droplet discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 FIG. is a schematic structural diagram of a cooking device according to an embodiment of the present application;

[0037] Figure 2 FIG. shows a schematic structural diagram of the cooking device according to the above embodiment of the present application with the door body and part of the outer shell omitted;

[0038] Figure 3 FIG. shows a schematic structural diagram of the exhaust system in the cooking device according to the above embodiment of the present application;

[0039] Figure 4 FIG. shows a schematic structural diagram of the air deflector group in the exhaust system according to the above embodiment of the present application;

[0040] Figure 5 FIG. shows an exploded schematic diagram of the air deflector group according to the above embodiment of the present application;

[0041] Figure 6 FIG. shows a top view schematic diagram of the air deflector group according to the above embodiment of the present application;

[0042] Figure 7 FIG. shows Figure 6 a schematic cross-sectional view taken along line A-A of the shown air deflector group.

[0043] MAIN ELEMENT SYMBOL DESCRIPTION:

[0044] 1. Exhaust system; 10. Mounting plate; 20. Air guide plate group; 200. Air guide channel; 201. Rear air guide section; 202. Front air guide section; 203. Air guide transition section; 204. Air outlet; 21. Lower air guide plate; 22. Upper air guide plate; 23. Intermediate air guide plate; 30. Fan; 40. Water tank; 50. Decorative strip; 60. Condenser assembly; 2. Cabinet; 3. Inner liner; 4. Door body.

[0045] The above descriptions of the main component symbols will further elaborate on this application in conjunction with the accompanying drawings and specific embodiments. Specific embodiments

[0046] To make the above objects, features, and advantages of this application more obvious and understandable, the following will provide a detailed description of the specific embodiments of this application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of this application. However, this application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of this application. Therefore, this application is not limited by the specific embodiments disclosed below.

[0047] In the description of this application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0048] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0049] In this application, unless otherwise clearly defined or limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] In this application, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0051] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a middle element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0052] Considering that the air guiding path of the existing flat air guiding system is often relatively short, and the temperature of the exhausted water vapor and / or hot air is relatively high, which not only has certain potential safety hazards, but also is likely to directly carry out water droplets during the steaming process and easily damage the cabinet. Therefore, to solve the above problems, this application provides an exhaust system and a cooking appliance, which can lengthen the exhaust path to reduce potential safety hazards while preventing water droplets from being discharged, which is beneficial to protecting the cabinet.

[0053] Specifically, as Figure 1 and Figure 2As shown, an embodiment of the present application provides a cooking device, which may include a cabinet 2, an inner container 3 disposed within the cabinet 2, a door 4 disposed on the cabinet 2 to open or close the opening of the inner container 3, and an exhaust system 1 located above the inner container 3 and communicating with the inner container 3, so as to discharge water vapor and / or hot air in the inner container 3 to the outside of the cabinet 2 through the exhaust system 1. It can be understood that the cooking device mentioned in the present application may but is not limited to include systems for implementing specific functions such as a spraying system, a heating system, a microwave system, etc. For example, the cooking device may but is not limited to be implemented as a steam box, an oven, a steam oven, a steam microwave oven, or a steam oven microwave oven.

[0054] More specifically, as Figures 2 to 7 shown, the exhaust system 1 may include a mounting plate 10 for being disposed above the inner container 3, a wind guide plate group 20, and a fan 30. The wind guide plate group 20 has a rear wind guide section 201 close to the mounting plate 10 and for communicating with the inner container 3, a front wind guide section 202 far from the mounting plate 10 and having an air outlet 204, and a wind guide transition section 203 extending obliquely upward from the rear wind guide section 201 to the front wind guide section 202, so as to form a wind guide channel 200 having a Z-shaped structure within the wind guide plate group 20. The fan 30 is installed in the rear wind guide section 201 of the wind guide plate group 20, so as to first suck out gases such as water vapor and / or hot air from the inner container 3 under negative pressure, and then discharge them to the outside through the wind guide channel 200 via the air outlet.

[0055] It should be noted that since the wind guide plate group 20 of the present application can provide a wind guide channel 200 having a Z-shaped structure, the effective exhaust path of the exhaust system 1 of the present application is increased by about one-third, so that the hot air flow (water vapor and / or hot air) sucked out from the inner container 3 can be fully mixed with the cold air sucked in from the outside within the wind guide channel 200, so as to reduce the temperature of the air flow discharged from the air outlet 204. At the same time, since the air flow needs to climb when flowing through the obliquely upward extending wind guide transition section 203, the water droplets in the air flow will flow back along the wind guide transition section 203 under the action of gravity, which helps to prevent the water droplets from being discharged. In other words, the exhaust system 1 of the present application not only lengthens the exhaust path through the Z-shaped channel, solves the problem that the high-temperature and low-temperature air flows of the flat wind guide system cannot be fully mixed, reduces the temperature of the exhaust port, and reduces potential safety hazards, but also prevents the water droplets from being discharged through the slope (i.e., the wind guide transition section 203) in the Z-shaped channel, so as to solve the problem that the flat wind guide system is prone to water droplet discharge.

[0056] Exemplarily, as Figures 4 to 7As shown, the air deflector group 20 may include a lower air deflector 21 installed above the mounting plate 10 and an upper air deflector 22 arranged at an interval from the lower air deflector 21 to form the air guiding channel 200 between the lower air deflector 21 and the upper air deflector 22.

[0057] Optionally, as shown in FIGS. 2 and Figure 3 As shown, the lower air deflector 21 and the mounting plate 10 are mutually attached at the rear air guiding section 201 of the air deflector group 20, and the lower air deflector 21 and the mounting plate 10 are mutually separated at the front air guiding section 202 of the air deflector group 20, so as to form an air guiding channel 200 with a Z-shaped structure, and at the same time, an installation space is reserved between the lower air deflector 21 and the mounting plate 10 for installing components such as a water tank and a water pump.

[0058] Optionally, as shown in Figures 1 to 3 As shown, the exhaust system 1 further includes a water tank 40 for communicating with the inner container 3. The water tank 40 is arranged in the installation space between the lower air deflector 21 and the mounting plate 10, so that the air outlet 204 of the air deflector group 20 is located above the water tank 40. In this way, for the cooking device of the present application, the door body 4 can directly adopt an integral door body, which can block the water tank 40 while closing the opening of the inner container 3, and will not block the air outlet 204 of the air deflector group 20 to ensure smooth exhaust, which is beneficial to improving the overall appearance of the device; and there is no need to adopt a split door body like traditional cooking utensils.

[0059] Optionally, as shown in Figure 2 and Figure 3 As shown, the water tank 40 is slidably inserted into the installation space between the lower air deflector 21 and the mounting plate 10, so that the water tank 40 can be pulled out like a drawer to clean or replenish water when the door is opened.

[0060] Preferably, when the water tank 40 is inserted into the installation space between the lower air deflector 21 and the mounting plate 10, the water tank 40 is thermally conductive and abuts against the lower air deflector 21, so that the hot air flow conveyed through the air guiding channel 200 can exchange heat with the liquid stored in the water tank 40, so as to further reduce the temperature of the exhaust port while increasing the temperature of the liquid stored in the water tank 40, realizing the recycling of heat.

[0061] More preferably, as shown in Figure 2 and Figure 3As shown, the water tank 40 abuts against the lower air deflector 21 face to face, and both the water tank 40 and the lower air deflector 21 are made of heat-conducting materials such as iron or copper, so as to increase the heat exchange area between the water tank 40 and the lower air deflector 21, improve the heat exchange efficiency between the hot air and the cold liquid, and further improve the energy utilization rate. It can be understood that in other examples of the present application, the water tank 40 and the lower air deflector 21 can also be implemented as plastic parts embedded with heat-conducting materials.

[0062] It should be noted that in the present application, the air deflector group 20 is aerodynamically designed to solve the problem of power loss. In other words, the air deflector group 20 of the present application adopts a Z-shaped fluid profiling design to ensure that the airflow power is basically not lost.

[0063] Exemplarily, as Figure 6 and Figure 7 shown, the lower air deflector 21 is bent at the connection between the rear air guiding section 201 and the air guiding transition section 203 to form a folding angle β, and the lower air deflector 21 satisfies the relational expression (1):

[0064]

[0065] In the formula: v1 is the direction vector of the lower air deflector 21 at the rear air guiding section 201; v2 is the direction vector of the lower air deflector 21 at the air guiding transition section 203. In this way, in the present application, the folding angle β of the lower air deflector 21 can be defined by the above relational expression, preventing the airflow from making a large-angle turn at the folding angle of the lower air deflector 21 and avoiding a large amount of airflow power loss. It can be understood that according to the definition of the dot product of vectors, the cosine value of the folding angle β is equal to the dot product of the two vectors divided by the product of the moduli of the two vectors; it can be easily known from the above relational expression (1) that the folding angle β of the lower air deflector 21 is implemented as an obtuse angle greater than or equal to 120°.

[0066] Optionally, the lower air deflector 21 further satisfies the relational expression (2):

[0067] x 2 +y 2 >150 2 (2);

[0068] In the formula: x and y are respectively the abscissa and ordinate of the bending point of the lower air deflector 21 in the fan coordinate system. It can be understood that the fan coordinate system mentioned in the present application refers to the coordinate system O-xy constructed with the center O of the fan 30 as the center of the circle. It can be easily known from the above relational expression (2) that the distance between the bending point of the lower air deflector 21 and the center of the fan 30 is greater than 150 mm, so that the airflow sent out by the fan 30 first flows along the original path for a certain distance before flowing to the bending point of the lower air deflector 21 for turning, which is beneficial to reducing wind resistance and further avoiding airflow power loss.

[0069] Optionally, as shown in Figure 6 and Figure 7 , the upper air deflector 22 is bent at the connection between the rear air guiding section 201 and the air guiding transition section 203 to form a first rounded corner θ1, and the upper air deflector 22 satisfies the relational expression (3):

[0070] C1(t) = (r1cost, r1sint), t ∈ [0, θ1] (3);

[0071] In the formula: C1(t) is the rounded corner function of the upper air deflector 22; r1 is the rounded corner radius of the upper air deflector 22, and r1 ≥ 10 mm; θ1 is the first rounded corner of the upper air deflector 22.

[0072] In this way, the upper air deflector 22 is rounded at the position corresponding to the bending point of the lower air deflector 21, and the rounded corner radius is greater than or equal to 10 mm, which is beneficial to ensuring that the air flow smoothly turns at the connection between the rear air guiding section 201 and the air guiding transition section 203, so as to reduce the wind resistance and avoid the loss of air flow power.

[0073] Optionally, as shown in Figure 6 and Figure 7 , the lower air deflector 21 is bent at the connection between the air guiding transition section 203 and the front air guiding section 202 to form a second rounded corner θ2, and the lower air deflector 21 satisfies the relational expression (4):

[0074] C2(t) = (2r1cost, 2r1, sint), t ∈ [0, θ2] (4);

[0075] In the formula: C2(t) is the rounded corner function of the lower air deflector 21; r1 is the rounded corner radius of the upper air deflector 22; θ2 is the second rounded corner of the lower air deflector 21. It can be understood that the rounded corner radius r2 of the lower air deflector 21 = 2r1.

[0076] In this way, the rounded corner radius of the lower air deflector 21 is twice that of the upper air deflector 22, so that the air flow turns more smoothly at the connection between the air guiding transition section 203 and the front air guiding section 202, so as to further reduce the wind resistance and avoid the loss of air flow power.

[0077] Optionally, as shown in Figure 6 and Figure 7 , the air deflector group 20 satisfies the relational expressions (5) and (6):

[0078]

[0079] H = 4h (6);

[0080] Where: f(X) is the height distribution function of the air guiding channel 200 along the extension direction; h is the front-end height of the air guiding channel 200; L is the extension length of the air guiding channel 200; H is the rear-end height of the air guiding channel 200. It can be understood that the air guiding channel 200 mentioned in this application refers to the distance between the lower air guiding plate 21 and the upper air guiding plate 22 at the corresponding position; in addition, the front-end height of the air guiding channel 200 mentioned in this application can, but is not limited to, refer to the height near the air outlet 204 on the front air guiding section 202, and the rear-end height of the air guiding channel 200 mentioned in this application can, but is not limited to, refer to the height far from the air outlet 204 on the rear air guiding section 201. It can be understood that the extension direction mentioned in this application refers to the length direction of the air guiding plate group 20, corresponding to the front-back direction of the cooking device.

[0081] In this way, the height of the air guiding channel 200 in the air guiding plate group 20 of this application gradually decreases from the fan 30 to the air outlet 204. Without almost any loss of air flow power, it can not only provide a sufficiently large channel space in the rear air guiding section 201 to accommodate the fan 30, facilitating the provision of a sufficiently large air flow power, but also provide a sufficiently small channel height in the front air guiding section 202 to reduce the longitudinal dimension of the air outlet 204, facilitating the improvement of the overall aesthetics of the cooking device.

[0082] Preferably, the front-end height h of the air guiding plate group 20 is greater than or equal to 1.5 mm, that is, h≥1.5 mm; then the rear-end height H of the air guiding plate group 20 is greater than or equal to 6 mm, that is, H≥6 mm, so as to meet the design requirements of current cooking devices.

[0083] It should be noted that in the above examples of this application, such as Figure 4 and Figure 5 shown, the air guiding plate group 20 may further include a pair of intermediate air guiding plates 23 located between the lower air guiding plate 21 and the upper air guiding plate 22. The two intermediate air guiding plates 23 are located in the front air guiding section 202, and the two intermediate air guiding plates 23 extend away from each other from the rear to the front to the air outlet 204 to form a V-shaped flow dividing member, facilitating the guiding of air flow to bifurcate and discharge at the air outlet 204, which is beneficial to the air flow to avoid the identification objects such as signs installed in the middle part of the air outlet 204.

[0084] Optionally, as Figure 2 and Figure 3As shown, the exhaust system 1 further includes a decorative strip 50, which is installed on the air guide plate group 20 and in front of the front air guide section 202, and the decorative strip 50 has a flared opening communicating with the air outlet 204. In this way, when the cooking device finishes closing the door, the decorative strip 50 is located directly above the door body 4, so as to guide the airflow discharged through the air outlet 204 to reduce the speed and discharge from the front of the door body 4, avoiding affecting the cabinet or the user.

[0085] According to the above embodiments of the present application, as Figure 2 and Figure 3 shown, the rear air guide section 201 of the air guide plate group 20 is connected to the inner container 3 through a pipeline, so as to communicate the internal space of the inner container 3 with the air guide channel 200 of the air guide plate group 20 through the pipeline, facilitating the extraction of the steam in the inner container 3 under the action of the fan 30.

[0086] Optionally, as Figure 2 and Figure 3 shown, the exhaust system 1 further includes a condenser assembly 60, which is arranged in the pipeline between the inner container 3 and the air guide plate group 20, and is used to first condense the steam discharged from the inner container 3 and then transport it to the air guide plate group 20 for discharge, so as to further reduce the exhaust port temperature. It can be understood that the condenser assembly 60 mentioned in the present application can be implemented as an air-cooled condenser or a water-cooled condenser. In particular, when the condenser assembly 60 is implemented as a water-cooled condenser, the water circuit of the water-cooled condenser can be connected to the water tank 40, so as to use the water in the water tank 40 to exchange heat with the steam discharged from the inner container 3 to achieve water cooling.

[0087] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as these combinations of technical features do not conflict, they should be considered to be within the scope described in this specification.

[0088] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application.

Claims

1. Exhaust system, characterized in that: include: A mounting plate, used for being arranged above the inner tank; An air guide plate group, comprising an air guide rear section close to the mounting plate and used to communicate with the inner liner, an air guide front section away from the mounting plate and having an air outlet, and an air guide transition section extending obliquely upward from the air guide rear section to the air guide front section, so as to form an air guide channel with a Z-shaped structure in the air guide plate group; as well as The fan is installed at the wind guide rear section of the wind guide plate group, and is used to first suck out the gas from the inner tank and then discharge it through the wind guide channel.

2. The exhaust system according to claim 1, characterized in that: The wind guide plate group includes a lower wind guide plate installed above the mounting plate and an upper wind guide plate spaced apart from the lower wind guide plate to form the wind guide channel between the lower wind guide plate and the upper wind guide plate; the lower wind guide plate and the mounting plate are in contact with each other at the wind guide rear section, and the lower wind guide plate and the mounting plate are separated from each other at the wind guide front section.

3. The exhaust system according to claim 2, characterized in that: The exhaust system also includes a water tank for communicating with the inner tank, and the water tank is arranged in the installation space between the lower air guide plate and the installation plate.

4. The exhaust system according to claim 3, characterized in that: The water tank is slidably inserted into the installation space between the lower air guide plate and the installation plate; and when the water tank is inserted into the installation space between the lower air guide plate and the installation plate, the water tank can be thermally abutted against the lower air guide plate.

5. The exhaust system according to any one of claims 2 to 4, characterized in that: The lower air guide plate is bent at the connection between the air guide rear section and the air guide transition section to form a folded angle, and the lower air guide plate satisfies the following relationship: In the formula: v1 is the direction vector of the lower air guide plate at the air guide rear section; v2 is the direction vector of the lower air guide plate at the air guide transition section.

6. The exhaust system according to claim 5, characterized in that: The lower air guide plate further satisfies the following relationship: x 2 +y 2 >150 2 ; Wherein: x and y are respectively the horizontal coordinate and the vertical coordinate of the bending point of the lower air guide plate in the fan coordinate system.

7. The exhaust system according to any one of claims 2 to 4, characterized in that: The upper air guide plate is bent at a connection between the air guide rear section and the air guide transition section to form a first fillet, and the upper air guide plate satisfies the following relationship: C1(t)=(r1cost, r1sint), t∈[0, θ1]); In the formula: C1(t) is the fillet function of the upper air guide plate; r1 is the fillet radius of the upper air guide plate, and r1≥10mm; θ1 is the first fillet of the upper air guide plate.

8. The exhaust system according to claim 7, characterized in that: The lower air guide plate is bent at a connection between the air guide transition section and the air guide front section to form a second fillet, and the lower air guide plate satisfies the following relationship: C2(t)=(2r1cost, 2r1sint), t∈[0, θ2] (4); Wherein: C2(t) is the fillet function of the lower air guide plate; r1 is the fillet radius of the upper air guide plate; θ2 is the second fillet of the lower air guide plate.

9. The exhaust system according to any one of claims 1 to 4, characterized in that: The air guide plate group satisfies the following relationship: H = 4h; Wherein: f(X) is the height distribution function of the air guiding channel along the extension direction; h is the front end height of the air guiding channel; L is the extension length of the air guiding channel; H is the rear end height of the air guiding channel.

10. The exhaust system according to any one of claims 2 to 4, characterized in that: The air guide plate group also includes a pair of intermediate air guide plates located between the lower air guide plate and the upper air guide plate, wherein two of the intermediate air guide plates are located in the air guide front section, and the two intermediate air guide plates extend gradually from the back to the front to the air outlet to form a V-shaped diverter.

11. The exhaust system according to any one of claims 1 to 4, characterized in that: The exhaust system also includes a decorative strip, wherein the decorative strip is installed on the air guide plate group and is located in front of the air guide front section, and the decorative strip has a bell mouth connected to the exhaust port; the exhaust system further includes a condenser assembly, which is used to be arranged in the pipeline between the inner tank and the air guide plate group.

12. A cooking device, characterized in that include: Box; An inner container disposed inside the box; A door body, arranged on the box body to open or close the opening of the inner container; as well as The exhaust system as claimed in any one of claims 1 to 11, wherein the exhaust system is located above the inner liner and is connected to the inner liner.

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