Cooking equipment

Abstract

The utility model provides cooking equipment which comprises a heat gathering unit and a discharging unit, the heat gathering unit comprises a discharging connecting piece and is provided with a cooking cavity formed in the inner side of the discharging connecting piece, the discharging unit comprises a flow guide piece, the flow guide piece is connected to the discharging connecting piece and is provided with a discharging channel, and the discharging connecting piece and the flow guide piece form an exhaust path; the exhaust unit further comprises a blocking part arranged on the exhaust path, the blocking part is provided with an exhaust leakage gap, and the exhaust leakage gap is communicated with the cooking cavity and the exhaust channel. And / or the discharging leakage gap is communicated with the discharging channel and the outside of the cooking equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen utensils, in particular to a cooking device. Background Art

[0002] Baking cooking devices such as ovens and steam ovens generate a circulating hot air flow through a hot air unit to heat and cook food materials. The hot air flow first flows out of the hot air unit, then passes through a hot air baffle into the cooking cavity, and then the hot air flow turns around and returns to the hot air baffle and passes through the hot air baffle again. When the hot air flow returns to the hot air unit, a cycle process ends. After the above cycle process is repeated several times, the food is cooked.

[0003] Generally, it is desired that the hot air flow stays in the baking cooking device for as long as possible, so that the hot air flow can perform multiple rounds of circulation to make full use of the heat carried by the hot air flow and avoid frequent startup of the hot air unit to heat air, resulting in an increase in power consumption. However, the current difficulty lies in that it is impossible to balance safety and multiple cycles of the hot air flow. Although restricting the outward discharge of the hot air flow can increase the residence time and cycle times of the hot air flow in the baking cooking device, since a large amount of hot air flow cannot be discharged and accumulates in the cooking cavity, the air pressure in the cooking cavity increases sharply, and when the user opens the cooking cavity to take food, it is extremely easy to be scalded by the hot air flow. Summary of the Utility Model

[0004] In view of this, the utility model provides a cooking device that allows the hot air flow to be discharged outward while being able to restrict the outward discharge rate of the hot air flow, aiming to balance the safety when taking food materials and increase the cycle times and residence duration of the hot air flow in the cooking device.

[0005] The cooking device of the utility model includes a heat accumulation unit and an outward discharge unit. The heat accumulation unit includes an outward discharge connecting piece and has a cooking cavity formed inside the outward discharge connecting piece. The outward discharge unit includes a guiding piece. The guiding piece is connected to the outward discharge connecting piece and has an outward discharge channel. The outward discharge connecting piece and the guiding piece form an exhaust path. The outward discharge unit further includes an obstructive piece arranged in the exhaust path. The obstructive piece has an outward discharge leakage gap. The outward discharge leakage gap communicates the cooking cavity with the outward discharge channel; and / or, the outward discharge leakage gap communicates the outward discharge channel with the outside of the cooking device.

[0006] Compared with the prior art, the beneficial effects of the cooking device of the utility model include:

[0007] 1) The cooking cavity communicates with the outside of the cooking device through the outward discharge channel and the outward discharge leakage gap, allowing the hot air flow to be discharged from the cooking device along the exhaust path, preventing the situation that the air pressure in the cooking cavity increases sharply, and reducing the risk that the user is scalded by the hot air flow when opening the cooking cavity to take food.

[0008] 2) The obstruction member provided in the exhaust path obstructs and interferes with the hot air flow, delaying the speed at which the hot air flow is discharged from the cooking device along the exhaust path. At the same time, it increases the number of cycles of the hot air flow between the hot air unit and the cooking cavity, avoiding waste caused by the premature and rapid discharge of the hot air flow from the cooking device, and improving the utilization rate of the heat carried in the hot air flow.

[0009] 3) It increases the residence time of the hot air flow in the cooking device, prevents temperature and heat fluctuations in the cooking cavity due to the rapid discharge of the hot air flow, helps reduce the frequency of starting and heating the air by the hot air unit, and reduces the total power consumption required to generate the hot air flow.

[0010] In some embodiments, the outer exhaust connector is provided with an air outlet hole communicating with the outer exhaust passage. The obstruction member includes a ventilation cover covering the air outlet hole. The ventilation cover includes an obstruction side wall protruding from the inner side of the outer exhaust connector. The outer exhaust leakage includes a first leakage opening formed in the obstruction side wall, and the first leakage opening communicates the cooking cavity with the air outlet hole.

[0011] With such a setting, the hot air flow attached to the inner side of the outer exhaust connector is allowed to enter the first leakage opening and then flow into the outer exhaust passage until it is discharged from the cooking device. The obstruction side wall has an obstructive and interfering effect on the hot air flow on the blowing path in the cooking cavity. Therefore, the path of the hot air flow on the blowing path flowing towards the air outlet hole is more tortuous and complex, and thus the hot air flow on the blowing path is relatively less likely to enter the outer exhaust passage, significantly delaying the rate of the hot air flow in the cooking cavity being discharged outward.

[0012] In some embodiments, it further includes a hot air unit. The side of the obstruction side wall relatively close to the hot air unit forms a rear side, and the side of the obstruction side wall relatively far from the hot air unit forms a front side, where

[0013] All of the first leakage openings are formed in the front side; alternatively, the first leakage opening includes a rear leakage opening and a front leakage opening respectively formed in the rear side and the front side, and the opening of the front leakage opening is larger than the opening of the rear leakage opening.

[0014] With such a setting, the opening of the first leakage opening generally faces away from the hot air unit. When the hot air flow is blown from the hot air unit into the cooking cavity, the hot air flow on the blowing path in the cooking cavity is difficult to directly enter the first leakage opening. The hot air flow on the blowing path reaches the rear side and then bypasses the ventilation cover and continues to flow in a direction away from the hot air unit to prevent the newly generated hot air flow from being discharged outward too quickly. Until the hot air flow accumulated in the cooking cavity reaches a certain amount, the internal pressure in the cooking cavity increases, and a part of the hot air flow is squeezed to the front side. Only at this time can the hot air flow enter the outer exhaust passage through the first leakage opening.

[0015] In some embodiments, the exhaust connection member includes a front end and a rear end. The front end is the end of the exhaust connection member relatively far from the hot air unit, and the rear end is the end of the exhaust connection member relatively close to the hot air unit. The distance from the air outlet hole to the front end is greater than the distance from the air outlet hole to the rear end.

[0016] With such a setting, the air outlet hole is basically at a dead corner position far from the blowing path in the cooking cavity, so that the hot air flow blown into the cooking cavity from the hot air unit can avoid the air outlet hole and the ventilation cover, ensuring that the newly generated hot air flow can flow along the blowing path until the internal pressure in the cooking cavity increases. Part of the hot air flow is squeezed near the air outlet hole, and then part of the hot air flow can enter the first leakage gap.

[0017] In some embodiments, the heat accumulation unit further includes a first side plate and a second side plate. The first side plate, the exhaust connection member and the second side plate are sequentially connected to enclose the cooking cavity. The distance from the first side plate to the air outlet hole is a1, and the distance from the second side plate to the air outlet hole is a2, and a1≠a2.

[0018] With such a setting, the air outlet hole is basically at a dead corner position far from the blowing path in the cooking cavity, further increasing the distance from the hot air flow blown into the cooking cavity from the hot air unit to the air outlet hole, thereby further ensuring that the newly generated hot air flow flows along the blowing path and does not flow into the first leakage gap prematurely.

[0019] In some embodiments, the ventilation cover further includes a sunken bottom wall arranged opposite to the air outlet hole. The blocking side wall extends along the outer peripheral edge of the sunken bottom wall and encloses with the sunken bottom wall to form a purification cavity. The purification cavity communicates the air outlet hole with the first leakage gap, and a purification module is arranged in the purification cavity.

[0020] With such a setting, the hot air flow entering the purification cavity from the first leakage gap can be purified and deodorized by the purification module, and after the hot air flow is purified and deodorized, it is discharged from the cooking device, so as to relieve the irritation of the hot air flow to the user's mouth and nose and reduce the impact of the hot air flow on the environment.

[0021] In some embodiments, the guide member includes a buffer tube connected to the exhaust connection member. The exhaust channel includes a buffer cavity formed in the buffer tube and communicating with the cooking cavity. The blocking member includes a bent tube bent and connected to the buffer tube. The exhaust leakage gap includes a second leakage gap formed in the bent tube, and the second leakage gap communicates the buffer cavity with the outside of the cooking device.

[0022] With such an arrangement, the hot air flow entering the buffer cavity from the cooking cavity can ultimately be discharged out of the cooking device through the second leakage gap. The bent pipe is bent relative to the buffer pipe, which can retard and delay the entry of the hot air flow in the buffer cavity into the second leakage gap. By means of the bent pipe, the buffer cavity is gradually filled with the hot air flow, preventing the hot air flow entering the buffer cavity from being discharged out prematurely, and at the same time enabling the interior of the buffer cavity to maintain a high-pressure state for a relatively long time. Thereby, the rate of the hot air flow entering the buffer cavity from the cooking cavity is retarded, which helps to increase the number of circulation times and the residence duration of the hot air flow in the cooking device.

[0023] In some embodiments, the guiding member further includes a connecting pipe bent and connected to the buffer pipe. One end of the connecting pipe away from the buffer pipe is connected to the outer discharge connecting member. The outer discharge channel further includes a waste gas flow channel formed in the connecting pipe, and both ends of the waste gas flow channel communicate with the buffer cavity and the cooking cavity respectively.

[0024] With such an arrangement, the path of the hot air flow entering the buffer cavity from the cooking cavity through the waste gas flow channel is more tortuous. The hot air flow experiences a significant velocity decay after entering the buffer cavity from the cooking cavity, increasing to a certain extent the difficulty of the hot air flow entering the buffer cavity from the cooking cavity. Thus, it helps to increase the number of circulation times and the residence duration of the hot air flow in the cooking device.

[0025] In some embodiments, a purification module is provided inside the waste gas flow channel.

[0026] With such an arrangement, the hot air flow entering the waste gas flow channel from the cooking cavity can be purified and deodorized by the purification module, and after the hot air flow is purified and deodorized, it enters the buffer cavity, ultimately alleviating the irritation of the hot air flow discharged out to the user's mouth and nose and improving the environmental hygiene.

[0027] In some embodiments, the buffer pipe includes a first connecting portion and a second connecting portion. The outer discharge connecting member and the bent pipe are respectively connected to the first connecting portion and the second connecting portion, and the distance from the buffer cavity to the outer discharge connecting member changes in an increasing trend from the first connecting portion to the second connecting portion.

[0028] With such an arrangement, the hot air flow entering the buffer cavity can generate a floating acceleration through the heat it carries, and thus can spontaneously flow from the first connecting portion towards the second connecting portion and approach until it enters the second leakage gap, ensuring that the hot air flow entering the buffer cavity maintains the trend of flowing towards the second leakage gap. In this way, it can prevent the hot air flow in the buffer cavity from flowing back into the cooking cavity.

[0029] In some embodiments, a climbing angle is formed between the extending direction of the buffer cavity and the extending direction of the outer discharge connecting member, and the climbing angle is not less than 3° and not greater than 8°.

[0030] With such a setting, the hot air flow in the buffer cavity can flow from the first connection part to the second connection part at a relatively slow and stable rate, and thus slowly and steadily enter the second leakage gap. During this process, the air pressure in the buffer cavity is relatively stable, which can not only ensure that the hot air flow will not flow back into the cooking cavity, but also avoid the rapid decrease of the internal air pressure in the buffer cavity caused by the too-fast discharge of the hot air flow.

[0031] In some embodiments, the buffer tube includes a first tube wall and a second tube wall arranged at intervals. The first tube wall is connected to the outer discharge connector and is provided with a side inlet to communicate the buffer cavity with the cooking cavity, wherein

[0032] the distance between the first tube wall and the second tube wall is less than the width of the first tube wall and the second tube wall; and / or, the width of the first tube wall and the second tube wall is not less than twice the diameter of the side inlet.

[0033] With such a setting, the buffer tube generally has a flat tubular structure, and the flow rate of the hot air flow will be significantly reduced after entering the buffer cavity from the cooking cavity. Generally, it is beneficial to avoid the premature and too-fast discharge of the hot air flow through the second leakage gap, and a high-pressure state can be maintained in the buffer cavity for a long time.

[0034] In some embodiments, the bent tube extends in a direction away from the outer discharge connector.

[0035] With such a setting, the bent tube can guide the hot air flow to a position away from the outer discharge connector, avoiding the discharge position of the hot air flow being too close to the heat accumulation unit and causing discomfort to the user.

[0036] In some embodiments, the second leakage gap penetrates through the bent tube and forms an exhaust port, and the cross-sectional area of the second leakage gap decreases from the buffer tube to the exhaust port.

[0037] With such a setting, the hot air flow entering the second leakage gap can be quickly discharged from the exhaust port, so that the hot air flow accumulated in the buffer cavity can continuously flow to the second leakage gap, ensuring that the process of discharging the hot air flow outward proceeds continuously and stably.

[0038] In some embodiments, the heat accumulation unit further includes a hot air baffle connected to the outer discharge connector. A hot air unit and a purification module are arranged on one side of the hot air baffle, and the cooking cavity is formed on the other side of the hot air baffle.

[0039] With such a setting, as the number of cycles of the hot air flow between the hot air unit and the cooking cavity increases, the number of times the hot air flow passes through the purification module increases. Therefore, before the hot air flow is discharged from the cooking device, the odor-carrying components in the hot air are fully filtered by the purification module, which can relieve the irritation to the user's mouth and nose after the hot air flow is discharged and reduce the impact of the hot air flow on the environment. Description of the Drawings

[0040] Figure 1 Front view of a cooking device according to an embodiment of the present utility model;

[0041] Figure 2 is Figure 1 Cross-sectional view of the cooking device shown in FIG. cut along plane A-A;

[0042] Figure 3 is Figure 2 Enlarged view of a partial structure of the cooking device shown in FIG. ;

[0043] Figure 4 Schematic structural view of an outer exhaust unit of a cooking device according to an embodiment of the present utility model;

[0044] Figure 5 Schematic perspective view of a cooking device according to an embodiment of the present utility model.

[0045] Reference numerals: 10, heat accumulation unit; 11, hot air baffle; 111, return air hole; 112, side blowing hole; 1131, first side convex edge; 1132, top convex edge; 1133, second side convex edge; 1134, bottom convex edge; 1135, first inclined convex edge; 1136, second inclined convex edge; 1137, third inclined convex edge; 1138, fourth inclined convex edge; 12, inner container assembly; 121, first side plate; 122, outer exhaust connecting piece; 1221, air outlet hole; 123, second side plate; 124, bottom plate; 125, cooking cavity; 20, outer exhaust unit; 21, flow guiding member; 211, buffer pipe; 2111, buffer cavity; 2112, first connecting pipe part; 2113, second connecting pipe part; 2114, first pipe wall; 2115, second pipe wall; 2116, side inlet; 212, connecting pipe piece; 2121, waste gas flow channel; 221, ventilation cover; 2211, first leakage gap; 2212, obstructive side wall; 2213, rear side; 2214, front side; 2215, sunken bottom wall; 2216, purification cavity; 222, bent pipe; 2221, second leakage gap; 2222, exhaust port; 30, hot air unit; 31, fan; 32, heating element; 40, back plate; 41, hot air cavity; 51, first purification module; 52, second purification module; 53, ventilation hole. Detailed implementation manners

[0046] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are for the purpose of describing specific embodiments only and are not intended to limit this utility model. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0048] This utility model provides a cooking device, which may specifically be an oven, a steam oven, etc. Referring to Figures 1 to 2 , the cooking device of this utility model includes a heat accumulation unit 10, a back plate 40, and a hot air unit 30. The heat accumulation unit 10 includes a hot air baffle 11 and an inner container assembly 12. The hot air baffle 11 includes a blowing side and a leeward side arranged opposite to each other. The inner container assembly 12 and the back plate 40 are respectively located on the blowing side and the leeward side of the hot air baffle 11. The blowing side and the inner container assembly 12 enclose to form a cooking cavity 125, which is used to place food materials and serves as a place for hot air flow to heat the food materials to make them cooked; a hot air cavity 41 is formed between the leeward side and the back plate 40, and the hot air unit 30 is arranged in the hot air cavity 41, and the hot air cavity 41 serves as a place for generating hot air flow. The hot air baffle 11 is provided with blowing holes and a return air hole 111, and the blowing holes and the return air hole 111 penetrate through the blowing side and the leeward side, thereby connecting the cooking cavity 125 and the hot air cavity 41.

[0049] Specifically, the hot air unit 30 includes a fan 31 rotatably arranged in the hot air cavity 41, and further includes a heating element 32 arranged in the hot air cavity 41. The rotation axis of the fan 31 passes through the hot air baffle 11, and the heating element 32 may be a heating tube circumferentially surrounding the outside of the fan 31 along the rotation axis of the fan 31. The inner container assembly 12 is a hollow prismatic structure with an inner container channel, and the extending direction of the inner container channel is the same as the extending direction of the rotation axis of the fan 31. The hot air baffle 11 is located at one end of the inner container channel. Thus, the inner wall surface of the inner container channel and the blowing side of the hot air baffle 11 enclose to form the cooking cavity 125, and the other end of the inner container channel forms an inner container opening to facilitate the user to take out or put food materials into the cooking cavity 125.

[0050] Referring to Figure 1 , Figure 5, the hot air baffle 11 includes a return air portion and a baffle portion. The return air portion is provided with a return air hole 111. The baffle portion is connected to the outer peripheral edge of the return air portion. The return air portion and the baffle portion are parallel or coplanar. The rotation axis of the fan 31 vertically passes through the return air portion of the hot air baffle 11. The inner container assembly 12 includes a first side plate 121, a top plate, a second side plate 123, and a bottom plate 124 sequentially arranged in the circumferential direction along the rotation axis. The inner wall surface of the inner container channel includes the side of the first side plate 121 facing the second side plate 123, the side of the top plate facing the bottom plate 124, the side of the second side plate 123 facing the first side plate 121, and the side of the bottom plate 124 facing the top plate. It can be understood that the inner wall surface of the inner container assembly 12 is the inner wall surface of the inner container channel.

[0051] When using the cooking device to bake food materials, the hot air unit 30 is first started and operated. The fan 31 rotates and disturbs the air in the hot air cavity 41. At the same time, the heating element 32 heats the air thrown out from the fan 31, thereby forming a hot air flow. The hot air flow enters the cooking cavity 125 through the blowing holes and passes through the hot air baffle 11. After flowing a certain distance in the cooking cavity 125, the hot air flow turns around and returns to the hot air baffle 11. The returned hot air flow enters the hot air cavity 41 as a return air flow through the return air hole 111 of the hot air baffle 11. Then, under the disturbing action of the fan 31, the return air flow becomes a hot air flow again. The hot air flow repeats the above process and circulates multiple rounds between the hot air cavity 41 and the cooking cavity 125 to heat the food materials multiple times. Usually, the return air flow still carries a lot of heat, which means that in most cases, after the return air flow enters the hot air cavity 41, it only needs to be disturbed by the fan 31 again to become a hot air flow again, without being reheated. Only after the hot air flow circulates multiple times and the return air flow returning to the hot air cavity 41 drops below a certain temperature, does this part of the return air flow need to be reheated to become a hot air flow again.

[0052] Therefore, the operation of the hot air unit 30 is as follows: during a complete food material cooking process, the fan 31 continuously rotates to continuously provide power for the circulation of the hot air flow. The heating element 32 is intermittently started and operated. After heating the air in the hot air cavity 41 once, the heating element 32 stops operating. The hot air flow circulates between the hot air cavity 41 and the cooking cavity 125 multiple times during the period when the heating element 32 stops operating until the temperature of the air in the hot air cavity 41 and the return air flow entering the hot air cavity 41 drops below a certain temperature, and then the heating element 32 operates again. In this way, not only the heat of the hot air flow is fully and efficiently utilized, but also the power consumption of the heating element 32 is reduced. The heating element 32 does not need to operate continuously for a long time, and it can prevent the fan 31 from being roasted for a long time. After the food material cooking is completed, the remaining hot air in the cooking cavity 125 and the hot air cavity 41 will be discharged from the cooking device.

[0053] Specifically, the hot air flow circulates between the hot air cavity 41 and the cooking cavity 125 along a preset circulation path, which includes a centrifugal path located in the hot air cavity 41, a blowing path located in the cooking cavity 125, and a return air path located in the cooking cavity 125. The centrifugal path refers to the path where the return air flow passing through the return air hole 111 and the hot air baffle 11 is thrown out radially along the fan 31 under the disturbance of the fan 31. The blowing path refers to the path where the hot air flow thrown out by the fan 31 flows along the direction away from the hot air baffle 11 after passing through the blowing hole and the hot air baffle 11. The return air path refers to the path where the hot air flow turns around and returns in the cooking cavity 125 and then flows towards the return air hole 111 along the direction close to the hot air baffle 11. The hot air flow that contributes to the ripening of the ingredients is mainly the hot air flow on the blowing path and the return air path.

[0054] Furthermore, the cooking device of the present utility model further includes an exhaust unit 20. The heat accumulation unit 10 includes an exhaust connection member 122 provided with an air outlet hole 1221. The cooking cavity 125 is formed inside the exhaust connection member 122 and communicates with the air outlet hole 1221. The exhaust unit 20 includes a diversion member 21 connected to the exhaust connection member 122. The diversion member 21 has an exhaust passage communicating the outside of the cooking device with the air outlet hole 1221. Therefore, the exhaust connection member 122 and the diversion member 21 form an exhaust path, and the exhaust path allows the hot air flow to be discharged from the cooking cavity 125 to the outside of the cooking device. The hot air flow can be discharged outwards along the exhaust path intensively after the ingredient cooking is completed, or can be discharged outwards intermittently in multiple times during the ingredient cooking process. Specifically, part of the hot air flow is discharged outwards along the exhaust path after circulating between the hot air cavity 41 and the cooking cavity 125 for several times. Then, the hot air unit 30 continues to supplement and generate the hot air flow. After the hot air flow circulates between the hot air cavity 41 and the cooking cavity 125 again for several times, part of the hot air flow is discharged along the exhaust path again.

[0055] In some embodiments, the top plate of the inner container assembly 12 is provided with an air outlet hole 1221 communicating with the cooking cavity 125, and the top plate serves as the exhaust connection member 122 of the heat accumulation unit 10. Refer to Figures 1 to 2, the flow guide member 21 is connected to the outer side of the top plate, the cooking cavity 125 is formed on the inner side of the top plate. The outer side of the top plate serves as the outer side of the outer exhaust connection member 122, specifically referring to the side of the top plate relatively far from the bottom plate 124. The inner side of the top plate serves as the inner side of the outer exhaust connection member 122, specifically referring to the side of the top plate relatively close to the bottom plate 124. It can be understood that the outer exhaust connection member 122 of the heat accumulation unit 10 can also be the first side plate 121 or the second side plate 123. When the first side plate 121 serves as the outer exhaust connection member 122, the first side plate 121 is provided with an air outlet hole 1221 communicating with the cooking cavity 125. The inner side of the outer exhaust connection member 122 is the side of the first side plate 121 relatively close to the second side plate 123. The flow guide member 21 is connected to the outer side of the first side plate 121. The outer side of the first side plate 121 at this time serves as the outer side of the outer exhaust connection member 122, specifically referring to the side of the first side plate 121 relatively far from the second side plate 123. When the second side plate 123 serves as the outer exhaust connection member 122, the second side plate 123 is provided with an air outlet hole 1221 communicating with the cooking cavity 125. The inner side of the outer exhaust connection member 122 is the side of the second side plate 123 relatively close to the first side plate 121. The flow guide member 21 is connected to the outer side of the second side plate 123. The outer side of the second side plate 123 at this time serves as the outer side of the outer exhaust connection member 122, specifically referring to the side of the second side plate 123 relatively far from the first side plate 121.

[0056] Obviously, it is necessary to let the hot air flow out of the cooking cavity 125. Otherwise, the hot air flow will stay in the cooking device for a long time and continuously absorb heat, resulting in a large amount of extremely high-temperature hot air accumulating in the cooking cavity 125, and the air pressure in the cooking cavity 125 will increase significantly. When the user opens the cooking cavity 125 and tries to take out the food, the user is easily burned by the high-temperature and high-pressure hot air in the cooking cavity 125. However, due to the existence of the air outlet hole 1221 and the outer exhaust channel, the hot air flow is difficult to stay in the cooking device for a long time. In most cases, the hot air flow only circulates a small number of times between the hot air cavity 41 and the cooking cavity 125 and then prematurely discharges outward through the flow guide member 21. The heat carried by the hot air flow is not efficiently utilized, and the temperature and the amount of hot air in the cooking cavity 125 fluctuate violently. In order not to affect the ripening efficiency of the food materials, the heating element 32 has to start frequently or even operate continuously, so as to continuously heat the air flow discharged from the self-fan 31 to continuously supplement the hot air flow into the cooking cavity 125. Therefore, the power consumption of the existing cooking device is relatively high, and a large amount of power consumption is used for the hot air unit 30 to generate the hot air flow.

[0057] In view of this, the improvements of the cooking device of the present utility model include: the external exhaust unit 20 further includes an obstruction member disposed on the exhaust path formed by the external exhaust connection member 122 and the guiding member 21 and having an external exhaust leakage gap, wherein the external exhaust leakage gap communicates the cooking cavity 125 with the external exhaust passage; and / or, the external exhaust leakage gap communicates the external exhaust passage with the outside of the cooking device. With such a setting, the cooking cavity 125 communicates with the outside of the cooking device through the external exhaust passage and the external exhaust leakage gap, thereby allowing the hot air flow to be discharged from the cooking device along the exhaust path. The obstruction member disposed on the exhaust path can obstruct and interfere with the hot air flow, delaying the speed of the hot air flow discharged along the exhaust path. The amount of hot air flow discharged outward within the same time is reduced, the residence time of the hot air flow in the cooking device is prolonged, the number of cycles of the hot air flow between the hot air cavity 41 and the cooking cavity 125 is increased, the utilization rate of the heat carried by the hot air flow is improved, the premature and excessive discharge of the hot air flow is avoided, the temperature fluctuation range in the cooking cavity 125 is reduced, and thus the heating unit does not need to be frequently started, reducing the power consumption of the hot air unit 30.

[0058] In some embodiments, the obstruction member includes a ventilation cover 221 covering the air outlet hole 1221. Refer to Figures 2 to 3 , the ventilation cover 221 is installed on the external exhaust connection member 122 formed by the top plate. The ventilation cover 221 includes an obstructive side wall 2212 and a sunken bottom wall 2215. The obstructive side wall 2212 protrudes from the inner side of the external exhaust connection member 122, and the sunken bottom wall 2215 is connected to one end of the obstructive side wall 2212 relatively far from the top plate and is arranged facing the air outlet hole 1221 opened on the top plate. The obstructive side wall 2212 and the sunken bottom wall 2215 jointly enclose a purification cavity 2216. The external exhaust leakage gap includes a first leakage gap 2211 opened on the obstructive side wall 2212. The cooking cavity 125, the first leakage gap 2211, the purification cavity 2216, the air outlet hole 1221, and the external exhaust passage are sequentially communicated. The ventilation cover 221 forms a convex platform structure protruding from the side of the top plate close to the bottom plate 124. For the hot air flow flowing along the blowing path, this convex platform structure makes the flow path of the hot air flow entering the air outlet hole 1221 and then flowing into the external exhaust passage more tortuous and complex. In other words, the hot air flow flowing along the blowing path is not easily discharged outward, delaying the external exhaust rate of the hot air flow. As the number of cycles of the hot air flow in the cooking device increases, the temperature and air pressure in the cooking cavity 125 gradually increase. A part of the hot air flow is squeezed to the inner side of the external exhaust connection member 122. At this time, the hot air flow attached to the inner side of the external exhaust connection member 122 will pass through the first leakage gap 2211 and enter the purification cavity 2216, and then enter the air outlet hole 1221 and the external exhaust passage.

[0059] Refer to Figure 3 and Figure 4, in some embodiments, the obstructive sidewall 2212 includes a front side 2214 and a rear side 2213. The front side 2214 is the side of the obstructive sidewall 2212 relatively far from the hot air unit 30 and the hot air baffle 11, and the rear side 2213 is the side of the obstructive sidewall 2212 relatively close to the hot air unit 30 and the hot air baffle 11. The first leakage gap 2211 is entirely formed on the front side 2214. Therefore, the hot air flow along the blowing path will first reach the rear side 2213, and then the hot air flow will bypass the ventilation cover 221 and continue to flow forward for a certain distance in a direction away from the hot air unit 30 and the hot air baffle 11. That is to say, the hot air flow along the blowing path will not immediately enter the first leakage gap 2211 even when it reaches the surface of the obstructive sidewall 2212. Only when the air pressure in the cooking cavity 125 rises to a certain level, a part of the hot air flow will be squeezed to the front side 2214 and thus enter the first leakage gap 2211. With this arrangement, it is achieved that the hot air flow intermittently flows into the exhaust passage through the first leakage gap 2211, that is, after the hot air flow circulates several times between the hot air cavity 41 and the cooking cavity 125, a part of the hot air flow will be discharged. When the air pressure in the cooking cavity 125 drops slightly, the exhaust of the hot air flow pauses until the hot air flow circulates several times again between the hot air cavity 41 and the cooking cavity 125, and then a part of the hot air flow will continue to be discharged.

[0060] In other embodiments, the first leakage gap 2211 includes a rear leakage gap formed on the rear side 2213 and a front leakage gap formed on the front side 2214, and the opening of the front leakage gap is larger than the opening of the rear leakage gap. With this arrangement, among the hot air flow entering the first leakage gap 2211 and then entering the exhaust passage, the vast majority is squeezed into the front leakage gap as the air pressure in the cooking cavity 125 rises, and only a small amount of the hot air flow along the blowing path enters the rear leakage gap. Therefore, it is also possible to suppress the premature and excessive outward discharge of the newly generated hot air flow.

[0061] Optionally, referring to Figures 2 to 3 , the purification assembly further includes a second purification module 52, and at least a part of the second purification module 52 is disposed in the purification cavity 2216. The part of the second purification module 52 located in the purification cavity 2216 cooperates with the inner wall of the purification cavity 2216 and is provided with ventilation holes 53 communicating the purification cavity 2216 with the exhaust passage. With this arrangement, the hot air flow entering the purification cavity 2216 from the first leakage gap 2211 can be purified and deodorized by the second purification module 52. Before the hot air flow enters the exhaust passage and becomes the exhaust gas flow, the odor components in the hot air flow are filtered out by the second purification module 52 again, and the odor concentration of the exhaust gas flow finally discharged to the outside of the cooking device is further reduced, so as to relieve the irritation to the user's mouth and nose, and further reduce the impact of the exhaust gas flow on the environment.

[0062] Specifically, the hot air flow located at the rear side 2213 and attached to the inner side of the outer exhaust connector 122 can enter the first leakage gap 2211 only after bypassing the ventilation cover 221 and reaching the front side 2214. In contrast, the hot air flow located at the front side 2214 and attached to the inner side of the outer exhaust connector 122 is relatively easier to enter the first leakage gap 2211. Taking the top plate as the outer exhaust connector 122 as an example, the opening of the first leakage gap 2211 faces away from the hot air baffle 11 and the hot air unit 30, and the opening of the air outlet hole 1221 faces the bottom plate 124. That is, the opening direction of the first leakage gap 2211 is perpendicular to the opening direction of the air outlet hole 1221. Therefore, the hot air flow needs to turn after entering the first leakage gap 2211 to enter the air outlet hole 1221. Of course, not only does the blocking side wall 2212 impede the hot air flow, but the second purification module 52 also has an effect of impeding and reducing the speed of the hot air flow.

[0063] Further, referring to Figure 2 and Figure 5 , whether the first side plate 121, the top plate or the second side plate 123 is provided with the air outlet hole 1221 and used as the outer exhaust connector 122, the outer exhaust connector 122 includes a front end and a rear end arranged opposite to each other. The front end is the end of the outer exhaust connector 122 relatively far from the hot air baffle 11 and the hot air unit 30, and the rear end is the end of the outer exhaust connector 122 relatively close to the hot air baffle 11 and the hot air unit 30. The front end is used to form the edge of the inner liner opening, and the distance from the air outlet hole 1221 to the front end is greater than the distance from the air outlet hole 1221 to the rear end. With such a setting, the air outlet hole 1221 is in a dead corner position far from the blowing path in the cooking cavity 125. After the hot air flow passes through the hot air baffle 11 and enters the cooking cavity 125, it can avoid the air outlet hole 1221 and the ventilation cover 221, and immediately flow along the blowing path, ensuring that the newly generated hot air flow does not enter the outer exhaust channel prematurely. When the top plate is provided with the air outlet hole 1221 and used as the outer exhaust connector 122, as Figure 5 shown, the distance from the first side plate 121 to the air outlet hole 1221 / ventilation cover 221 is a1, and the distance from the second side plate 123 to the air outlet hole 1221 / ventilation cover 221 is a2, and a1≠a2. With such a setting, the hot air flow flowing along the blowing path is farther away from the air outlet hole 1221 / ventilation cover 221, and the newly generated hot air flow can smoothly avoid the first leakage gap 2211 and the air outlet hole 1221 to prevent premature and excessive discharge.

[0064] In some embodiments, the flow guide member 21 includes a buffer tube 211 connected to the outside of the outer discharge connection member 122. The outer discharge channel includes a buffer cavity 2111 formed inside the buffer tube 211. The blocking member further includes a bent tube 222 bent and connected to the buffer tube 211. The outer discharge leakage gap further includes a second leakage gap 2221 formed inside the bent tube 222. The cooking cavity 125, the air outlet hole 1221, the buffer cavity 2111, and the second leakage gap 2221 are communicated in sequence. With such a setting, the hot air flow entering the buffer cavity 2111 from the cooking cavity 125 can finally be discharged out of the cooking device through the second leakage gap 2221. For the convenience of description, the hot air flow entering the buffer tube 211 is called the exhaust gas flow. The bent tube 222 as the blocking member is at the end of the exhaust path. When the exhaust gas flow flows along the buffer cavity 2111 towards the second leakage gap 2221, it will be blocked by the inner wall surface of the bent tube 222 and turn. Therefore, the bent tube 222 can inhibit the exhaust gas flow from entering the second leakage gap 2221 too quickly and being discharged outwards. By means of the bent tube 222, the exhaust gas flow gradually fills the buffer cavity 2111 and stays in the buffer cavity 2111 for a longer time, and also makes the air pressure in the buffer cavity 2111 gradually increase. The increase in the internal air pressure of the buffer cavity 2111 can delay the rate of the hot air flow entering the buffer cavity 2111 from the cooking cavity 125, thereby increasing the number of cycles of the hot air flow between the hot air cavity 41 and the cooking cavity 125 and prolonging the residence time of the hot air flow in the cooking device.

[0065] Specifically, the flow guide member 21 further includes a connecting tube 212 bent and connected to the buffer tube 211. The outer discharge channel further includes an exhaust gas flow path 2121 formed inside the connecting tube 212. Refer to Figures 2 to 4, the buffer pipe 211 includes a first connection part 2112 and a second connection part 2113. One end of the connection piece 212 is connected to the first connection part 2112, and the other end of the connection piece 212 is connected to the outside of the external exhaust connection piece 122. One end of the bent pipe 222 is connected to the second connection part 2113, and the other end of the bent pipe 222 extends in a direction away from the external exhaust connection piece 122. The second leakage gap 2221 penetrates through the end of the connection piece 212 relatively far from the second connection part 2113 to form an exhaust port 2222. The two ends of the waste gas flow channel 2121 are respectively communicated with the buffer cavity 2111 and the air outlet hole 1221. With such a setting, a more tortuous exhaust path is formed inside the external exhaust connection piece 122, the connection piece 212 and the buffer pipe 211. The hot air flow flows along the inside of the external exhaust connection piece 122, the air outlet hole 1221, the waste gas flow channel 2121, the buffer cavity 2111, and the second leakage gap 2221 and finally discharges from the exhaust port 2222. During this process, the hot air flow turns at least three times. The first turn occurs when entering the air outlet hole 1221, the middle turn occurs when entering the buffer cavity 2111 from the waste gas flow channel 2121, and the last turn occurs when entering the second leakage gap 2221 from the buffer cavity 2111. The flow rate of the hot air flow decays significantly, increasing the difficulty for the hot air flow to enter the buffer cavity 2111 from the cooking cavity 125. Therefore, it helps to increase the number of cycles and the retention time of the hot air flow in the cooking device.

[0066] Refer to Figures 3 to 4 , the top plate of the inner container assembly 12 serves as the external exhaust connection piece. The buffer pipe 211 has a flat tubular structure, including a first pipe wall 2114 and a second pipe wall 2115 arranged at intervals. The buffer cavity 2111 is formed between the first pipe wall 2114 and the second pipe wall 2115. The first pipe wall 2114 is provided with a side inlet 2116, and the second pipe wall 2115 is located on the side of the first pipe wall 2114 relatively far from the external exhaust connection piece 122. The end of the connection piece 212 relatively far from the external exhaust connection piece 122 is hermetically connected to the opening edge of the side inlet 2116, so that the side inlet 2116 communicates the buffer cavity 2111 with the waste gas flow channel 2121. Therefore, the opening edge of the side inlet 2116 forms the first connection part 2112. The distance from the buffer cavity 2111 to the external exhaust connection piece 122 changes in an increasing trend from the first connection part 2112 to the second connection part 2113. The distance from the buffer cavity 2111 to the external exhaust connection piece 122 is the distance from the side of the first pipe wall 2114 facing the second pipe wall 2115 to the external exhaust connection piece 122. Therefore, a climbing angle is formed between the extending direction of the buffer cavity 2111 and the extending direction of the external exhaust connection piece 122. The minimum value of the climbing angle is 3°, and the maximum value of the climbing angle is 8°.

[0067] With such an arrangement, the exhaust gas flow entering the buffer chamber 2111 has a tendency to spontaneously flow from the first connection part 2112 to the second connection part 2113 and thus approach the second leakage gap 2221. This is because the exhaust gas flow carries heat, so the exhaust gas flow has an upward acceleration at room temperature. While the exhaust gas flow flows from the first connection part 2112 to the second connection part 2113, it just floats upward. Therefore, the buffer pipe 211 can effectively prevent the exhaust gas flow from flowing back into the cooking chamber 125 from the buffer chamber 2111. The climbing angle between 3° and 8° ensures that the exhaust gas flow flows toward the second leakage gap 2221 at a slow and stable rate, which helps to maintain the stability of the internal air pressure in the buffer chamber 2111. It will neither cause the exhaust gas flow to flow back into the cooking chamber 125 due to the increase in the internal air pressure in the buffer chamber 2111, nor cause the hot air flow in the cooking chamber 125 to enter the buffer chamber 2111 prematurely and too quickly due to the decrease in the internal air pressure in the buffer chamber 2111.

[0068] Optionally, referring to Figure 3 , the purification assembly further includes a second purification module 52, and at least a part of the second purification module 52 is arranged inside the exhaust gas flow channel 2121. The part of the second purification module 52 located inside the exhaust gas flow channel 2121 cooperates with the inner wall of the exhaust gas flow channel 2121 and is provided with ventilation holes 53 communicating the cooking chamber 125 and the buffer chamber 2111. While the exhaust gas flow passes through the ventilation holes 53, the odor components in the exhaust gas flow are filtered and adsorbed by the second purification module 52. With such an arrangement, the exhaust gas flow can be purified and deodorized by the second purification module 52 before entering the buffer chamber 2111, and the odor concentration of the exhaust gas flow finally discharged to the outside of the cooking device is further reduced, which can relieve the irritation of the exhaust gas flow to the user's mouth and nose and reduce the pollution of the exhaust gas flow to the environment.

[0069] In some embodiments, the second purification module 52 can chemically react with the odor components, and the hot air flow passing through the second purification module 52 can increase the chemical reaction rate between the second purification module 52 and the odor components and catalyze the reaction. In other embodiments, the second purification module 52 can physically adsorb and intercept the odor components, and the temperature of the hot air flow can increase the activity of the second purification module 52, thereby improving the interception and adsorption ability of the second purification module 52 for the odor components.

[0070] Optionally, referring to Figures 3 to 4, the cross-sectional area of the second leakage gap 2221 decreases from the second connection part 2113 to the exhaust port 2222. The second connection part 2113 includes a pipe section with an arc-shaped tubular structure. The buffer cavity 2111 and the second leakage gap 2221 are connected through the inner cavity of the second connection part 2113 and achieve an arc transition. With such a setting, after the waste gas airflow enters the second leakage gap 2221 from the inner cavity of the second connection part 2113, it can flow out quickly with a smaller flow rate and a higher flow velocity, so as to ensure that the waste gas airflow is smoothly discharged outward, avoid blockage when the waste gas airflow flows out, and prevent the sudden increase in air pressure in the buffer cavity 2111 from causing the reverse flow of the waste gas airflow. When the top plate is used as the external exhaust connector 122, the bent pipe 222 extending upward in the direction away from the external exhaust connector 122 can guide the waste gas airflow upward so that the waste gas airflow can be absorbed by the range hood located above the cooking device.

[0071] Optionally, referring to Figure 4 , the distance between the first pipe wall 2114 and the second pipe wall 2115 is less than the widths of the first pipe wall 2114 and the second pipe wall 2115. The widths of the first pipe wall 2114 and the second pipe wall 2115 are not less than twice the diameter of the side inlet 2116. With such a setting, the buffer pipe 211 as a whole is closer to a flat tubular structure, the buffer cavity 2111 is a flat cavity, and after the waste gas airflow enters the buffer cavity 2111 through the waste gas flow channel 2121, it immediately hits the second pipe wall 2115 head-on, greatly reducing the flow velocity of the waste gas airflow. Then the waste gas airflow diffuses and overflows laterally along the first pipe wall 2114 to gradually fill the buffer cavity 2111. In this way, it can be avoided that the waste gas airflow enters the second leakage gap 2221 prematurely and too quickly, and the buffer cavity 2111 can maintain a high-pressure state for a long time. Generally, the air pressure in the buffer cavity 2111 is approximately equal to or slightly less than the air pressure in the cooking cavity 125, but greater than the ambient air pressure outside the cooking device. In other words, from the cooking cavity 125 to the buffer cavity 2111, and then to the external environment of the cooking device, a gradually decreasing air pressure distribution is generally established.

[0072] Furthermore, in view of the fact that the odor components in the food ingredients will diffuse into the hot air airflow, and the diffusion amount will increase with the increase of the number of cycles of the hot air airflow in the cooking device, resulting in a pungent smell of the hot air airflow, the purification component further includes a first purification module 51 provided in the hot air cavity 41. In this way, the return airflow entering the hot air cavity 41 and the air accumulated in the hot air cavity 41 can be filtered by the first purification module 51 to remove the odor components, so that the concentration of the odor components in the newly generated hot air airflow in the hot air cavity 41 decreases. Through the purification and deodorization of the hot air airflow by the first purification module 51, finally, when the hot air is discharged from the cooking device, it is not easy to bring a strong pungent feeling to the user, reducing the impact of the externally discharged hot air on the environment.

[0073] Referring to Figure 2, in some embodiments, the first purification module 51 is disposed on the outer peripheral side of the fan 31. The fan 31 includes a main body portion and fan blades connected to the main body portion. The main body portion is disposed opposite to the air return portion. The hot air unit 30 further includes a driving member connected to the main body portion of the fan 31. The driving member can drive the fan 31 to rotate around a preset rotation center, and the preset rotation center serves as the rotation axis of the fan 31. The outer peripheral side of the fan 31 includes the end of the fan blades relatively far from the preset rotation center. When the fan 31 rotates, it sucks in air so that the air flows back along the extension direction of the preset rotation center and approaches the main body portion. Subsequently, the sucked air is pushed by the fan blades and accelerated. Finally, these airflows are thrown out of the end of the fan 31 under the action of centrifugal force. Therefore, the outer peripheral side of the fan 31 composed of the ends of the fan blades is the air outlet portion of the fan 31. After the airflow leaves the fan 31, it will flow to the first purification module 51 and the odor components are filtered out by the first purification module 51. Then, these airflows are blown towards the cooking cavity 125 as hot airflows.

[0074] Specifically, referring to Figure 2 , the heating element 32 is located on the outer peripheral side of the fan 31, and the first purification module 51 is located on the side relatively far from the fan 31 with respect to the heating element 32. With such an arrangement, after the airflow is thrown out of the fan 31, it first flows through the heating element 32 and is heated by the heating element 32 to rise in temperature and thus becomes a hot air flow. Then, the hot air flow flows through the first purification module 51 and the odor components are filtered out by the first purification module 51. That is to say, the first purification module 51 purifies the airflow carrying heat, and a higher temperature can improve the efficiency of the first purification module 51 in filtering out odor components.

[0075] In some embodiments, the first purification module 51 can chemically react with odor components. The hot air flow flowing through the first purification module 51 can increase the chemical reaction rate between the first purification module 51 and the odor components and catalyze the reaction. In other embodiments, the first purification module 51 can physically adsorb and intercept odor components. The temperature of the hot air flow can increase the activity of the first purification module 51, thereby improving the interception and adsorption ability of the first purification module 51 for odor components.

[0076] Optionally, referring to Figure 2, the heating element 32 is a heating tube, which includes a closed-loop tube section that circumferentially surrounds the fan 31 along the rotation axis of the fan 31. The first purification module 51 has a closed-loop structure, and the first purification module 51 circumferentially surrounds the outer peripheral side of the closed-loop tube section along the rotation axis of the fan 31. That is, the first purification module 51 itself has a hollow area, and both the fan 31 and the closed-loop tube section are accommodated in the hollow area of the first purification module 51. Preferably, both the closed-loop tube section and the first purification module 51 are circular ring structures, and the closed-loop tube section, the first purification module 51, and the fan 31 are coaxially arranged. The rotation axis of the fan 31 coincides with the axis of the closed-loop tube section and also coincides with the axis of the first purification module 51. In this way, the air ejected from each radial direction of the fan 31 can be heated by the heating element 32, and the air ejected from each radial direction of the fan 31 can have the odor components filtered out by the first purification module 51, improving the purification and deodorization effect and preventing some hot air flows from missing the first purification module 51.

[0077] Optionally, referring to Figure 2 , both ends of the first purification module 51 respectively abut against the leeward side of the hot air baffle 11 and the side of the back plate 40 facing the hot air baffle 11. Therefore, one end of the hollow area of the first purification module 51 is covered by the hot air baffle 11, and the other end of the hollow area of the first purification module 51 is covered by the back plate 40. Correspondingly, the first purification module 51 is provided with ventilation holes 53, and the ventilation holes 53 penetrate through the side of the first purification module 51 relatively close to the fan 31 and also penetrate through the side of the first purification module 51 relatively far from the fan 31.

[0078] In this way, the first purification module 51, the hot air baffle 11, and the back plate 40 jointly enclose a closed space area. The closed space area is only connected to the cooking cavity 125 through the return air holes 111, and the closed space area is only connected to the hot air cavity 41 located outside the first purification module 51 through the ventilation holes 53 of the first purification module 51. This means that the recirculation air flow entering the closed space area and the air accumulated in the closed space area can only diffuse to the hot air cavity 41 area outside the first purification module 51 through the ventilation holes 53 of the first purification module 51, ensuring that all the hot air flows ejected from the fan 31 can flow through the first purification module 51 and thus have the odor components fully filtered out by the first purification module 51, significantly improving the deodorization and purification effect.

[0079] The ventilation holes 53 may be mesh holes extending radially along the first purification module 51. The mesh holes are evenly distributed circumferentially along the first purification module 51. Each ventilation hole 53 penetrates the inner peripheral side of the first purification module 51 at one end relatively close to the rotation axis of the fan 31. The inner peripheral side of the first purification module 51 is the side of the first purification module 51 relatively close to the fan 31 and the heating element 32. Each ventilation hole 53 penetrates the outer peripheral side of the first purification module 51 at the other end relatively far from the rotation axis of the fan 31. The outer peripheral side of the first purification module 51 is the other side of the first purification module 51 relatively far from the fan 31 and the heating element 32. In this way, the number of ventilation holes 53 is large and the distribution is dense. The inner wall surface of the ventilation holes 53 serves as the main surface for the first purification module 51 to filter out odor components, significantly increasing the contact area between the first purification module 51 and the hot air flow.

[0080] Refer to Figure 1 , Figure 5 , in some embodiments, a part of the hot air baffle 11 protrudes relative to the back plate 40 along the rotation axis of the fan 31 and extends into the inner tank channel, so that at least the baffle part is located in the inner tank channel. The hot air baffle 11 further includes a convex edge part. The convex edge part is bent and connected to the outer peripheral edge of the baffle part and protrudes from the side of the baffle part facing the back plate 40. The end of the convex edge part relatively far from the outer peripheral edge of the baffle part is connected to the back plate 40. There is a gap between the convex edge part and the inner wall surface of the inner tank channel. The blowing holes include side blowing holes 112 formed in the convex edge part, and the openings of the side blowing holes 112 face the inner wall surface of the inner tank channel. Preferably, the convex edge part is a closed-loop structure extending along the outer peripheral edge of the baffle part. The convex edge part surrounds the baffle part and circumferentially surrounds the hot air unit 30 along the rotation axis of the fan 31. The outer peripheral side of the first purification module 51 faces the inner peripheral wall of the convex edge part.

[0081] Specifically, as Figure 1As shown, the outer periphery of the baffle portion is approximately octagonal, including a first side edge, a first bevel edge, a top edge, a second bevel edge, a second side edge, a third bevel edge, a bottom edge, and a fourth bevel edge sequentially arranged in the circumferential direction along the rotation axis of the fan 31; the convex edge portion includes a first side convex edge 1131 bent and connected to the first side edge, a first bevel convex edge 1135 bent and connected to the first bevel edge, a top convex edge 1132 bent and connected to the top edge, a second bevel convex edge 1136 bent and connected to the second bevel edge, a second side convex edge 1133 bent and connected to the second side edge, a third bevel convex edge 1137 bent and connected to the third bevel edge, a bottom convex edge 1134 bent and connected to the bottom edge, and a fourth bevel convex edge 1138 bent and connected to the fourth bevel edge. The side of the first side plate 121 facing the second side plate 123 is spaced and opposite to the first side convex edge 1131, the side of the top plate facing the bottom plate 124 is spaced and opposite to the top convex edge 1132, the side of the second side plate 123 facing the first side plate 121 is spaced and opposite to the second side convex edge 1133, and the side of the bottom plate 124 facing the top plate is spaced and opposite to the bottom convex edge 1134. The two ends of the first bevel convex edge 1135 are respectively connected to the first side convex edge 1131 and the top convex edge 1132, the side of the first bevel convex edge 1135 away from the hot air unit 30 faces the included angle between the first side plate 121 and the top plate, the two ends of the second bevel convex edge 1136 are respectively connected to the top convex edge 1132 and the second side convex edge 1133, the side of the second bevel convex edge 1136 away from the hot air unit 30 faces the included angle between the top plate and the second side plate 123, the two ends of the third bevel convex edge 1137 are respectively connected to the second side convex edge 1133 and the bottom convex edge 1134, the side of the third bevel convex edge 1137 away from the hot air unit 30 faces the included angle between the second side plate 123 and the bottom plate 124, the two ends of the fourth bevel convex edge 1138 are respectively connected to the bottom convex edge 1134 and the first side convex edge 1131, and the side of the fourth bevel convex edge 1138 away from the hot air unit 30 faces the included angle between the bottom plate 124 and the first side plate 121.

[0082] Optionally, as Figure 1 , Figure 5As shown, the side air blowing holes 112 are formed in any one or more of the first side convex edge 1131, the top convex edge 1132, the second side convex edge 1133, and the bottom convex edge 1134; no side air blowing holes 112 are formed in the first inclined convex edge 1135, the second inclined convex edge 1136, the third inclined convex edge 1137, and the fourth inclined convex edge 1138. With such an arrangement, not only does it not affect the hot air flow passing through the hot air baffle 11 and blowing towards the cooking cavity 125, but also it can inhibit the hot air flow from flowing into the dead corner areas on the inner wall surface of the inner container channel, enabling the hot air flow along the blowing path to avoid the air outlet holes 1221, which are usually formed in the dead corner areas on the inner wall surface of the inner container channel, thereby helping to increase the number of cycles of the hot air flow. The dead corner areas on the inner wall surface include the angles between the first side plate 121 and the top plate, between the top plate and the second side plate 123, between the second side plate 123 and the bottom plate 124, and between the bottom plate 124 and the first side plate 121. Especially when the air outlet holes 1221 are formed in the area of the top plate near the hot air baffle 11 and the first side plate 121, the first inclined convex edge 1135 can inhibit the hot air flow from flowing towards the air outlet holes 1221, preventing the hot air flow from entering the outer discharge channel and being discharged from the cooking device prematurely and too quickly through the air outlet holes 1221, thereby increasing the number of cycles of the hot air flow.

[0083] It can be understood that when the top plate is used as the outer discharge connector 122 and the air outlet holes 1221 are formed in the area of the top plate near the hot air baffle 11 and the first side plate 121, the distance from the air outlet holes 1221 to the front end of the top plate is greater than the distance from the air outlet holes 1221 to the rear end of the top plate. The distance from the first side plate 121 to the air outlet holes 1221 is a1, and the distance from the second side plate 123 to the air outlet holes 1221 is a2, where a1 < a2. The front end of the top plate is the end of the top plate relatively far from the hot air unit 30 and the hot air baffle 11, and the rear end of the top plate is the end of the top plate relatively close to the hot air unit 30 and the hot air baffle 11. Of course, it can also be that a1 is greater than a2, in which case the second inclined convex edge 1136 plays a role in inhibiting the hot air flow from flowing towards the air outlet holes 1221.

[0084] Optionally, in some embodiments, the blowing holes further include direct blowing holes formed in the baffle portion. The hot air flow passing through the direct blowing holes can directly blow towards the cooking cavity 125 and then directly flow towards the inner container opening. In contrast, due to the wall attachment effect of the fluid, the hot air flow passing through the side blowing holes 112 mainly flows along the inner wall surface of the inner container channel. Therefore, the hot air flow passing through the direct blowing holes is responsible for directly baking the food ingredients, while the hot air flow passing through the side blowing holes 112 is more used to form a heat flow field that occupies the cooking cavity 125. The heat flow field surrounds the food ingredients. The above two hot air flows cooperate with each other to ensure that the food ingredients are fully heated and cooked. The side blowing holes 112 formed in the convex edge portion are more convenient for the hot air flow to pass through. After the hot air flow is thrown out of the fan 31, it has a radial velocity vector that flows radially along the rotation axis of the fan 31. By virtue of the radial velocity vector, most of the hot air flow directly blows towards the inner side of the convex edge portion facing the hot air unit 30, and then directly passes through the side blowing holes 112 until it reaches the inner wall surface of the inner container channel. Of course, the direct blowing holes on the baffle portion can also be cancelled.

[0085] Further, whether the blowing holes are direct blowing holes formed in the baffle portion, side blowing holes 112 formed in the convex edge portion, or both direct blowing holes and side blowing holes 112, the shortest distance from the blowing holes to the rotation axis is not less than the longest distance from the first purification module 51 to the rotation axis. Refer to Figure 2 , the distance from the side blowing holes 112 formed in the convex edge portion to the rotation axis of the fan 31 is greater than the distance from the outer peripheral side of the first purification module 51 to the rotation axis of the fan 31. If observing the blowing side of the hot air baffle 11 in the sight direction parallel to the rotation axis of the fan 31, as Figure 1 shown, then the projection of the blowing holes on the plane parallel to the hot air baffle 11 is the projection of the air outlet opening, the projection of the first purification module 51 on the plane parallel to the hot air baffle 11 is the projection of the deodorizing position, and the projection of the return air holes 111 on the plane parallel to the hot air baffle 11 is the projection of the return air opening. It is stipulated that the plane parallel to the hot air baffle 11 is parallel to the hot air baffle 11 and perpendicular to the rotation axis of the fan 31. Then, the projection of the deodorizing position is a closed-loop graph, the projection of the air outlet opening is all located outside the projection of the deodorizing position, and the projection of the return air opening is all located inside the projection of the deodorizing position. In this way, all the return air flows entering the hot air cavity 41 through the return air holes 111 pass through the first purification module 51 and then reach the outer peripheral side of the first purification module 51, and the hot air flows blowing from the blowing holes towards the cooking cavity 125 all pass through the first purification module 51.

[0086] The cooking device of the present utility model adopts the form of arranging the first purification module 51 in the hot air cavity 41. When the user takes out or puts in food materials from or into the cooking cavity 125, the user will not be interfered by the first purification module 51, and at the same time, the situation that the first purification module 51 is contaminated by food materials is avoided, so that the first purification module 51 can maintain cleanliness for a longer time without being frequently cleaned or replaced.

[0087] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0088] Those of ordinary skill in the art of the present technology should recognize that the above embodiments are only used to illustrate the present utility model, rather than to limit the present utility model. As long as appropriate changes and variations made to the above embodiments fall within the scope of the spirit of the present utility model, they fall within the scope of protection required by the present utility model.

Claims

1. A cooking device, characterized in that, It includes a heat accumulation unit (10) and an exhaust unit (20). The heat accumulation unit (10) includes an exhaust connection part (122) and has a cooking cavity (125) formed inside the exhaust connection part (122). The exhaust unit (20) includes a diversion part (21) and an obstruction part. The diversion part (21) is connected to the exhaust connection part (122) and has an exhaust channel. The exhaust connection part (122) and the diversion part (21) form an exhaust path. The obstruction part is arranged in the exhaust path and has an exhaust leakage gap. The exhaust leakage gap communicates the cooking cavity (125) with the exhaust channel; and / or, the exhaust leakage gap communicates the exhaust channel with the outside of the cooking device.

2. The cooking device according to claim 1, characterized in that, The exhaust connection part (122) is provided with an air outlet hole (1221) communicating with the exhaust channel. The obstruction part includes a ventilation cover (221) covering the air outlet hole (1221). The ventilation cover (221) includes an obstruction side wall (2212) protruding from the inner side of the exhaust connection part (122). The exhaust leakage gap includes a first leakage gap (2211) formed in the obstruction side wall (2212). The first leakage gap (2211) communicates the cooking cavity (125) with the air outlet hole (1221).

3. The cooking device according to claim 2, characterized in that, It further includes a hot air unit (30). A rear side (2213) is formed on one side of the obstruction side wall (2212) relatively close to the hot air unit (30), and a front side (2214) is formed on the other side of the obstruction side wall (2212) relatively far from the hot air unit (30). Among them all of the first leakage gap (2211) is formed in the front side (2214); or the first leakage gap (2211) includes a rear leakage gap and a front leakage gap respectively formed in the rear side (2213) and the front side (2214), and the opening of the front leakage gap is larger than that of the rear leakage gap.

4. The cooking device according to claim 3, characterized in that, The exhaust connection part (122) includes a front end and a rear end. The front end is the end of the exhaust connection part (122) relatively far from the hot air unit (30), and the rear end is the end of the exhaust connection part (122) relatively close to the hot air unit (30). The distance from the air outlet hole (1221) to the front end is greater than the distance from the air outlet hole (1221) to the rear end.

5. The cooking device according to claim 4, characterized in that, The heat accumulation unit (10) further includes a first side plate (121) and a second side plate (123). The first side plate (121), the exhaust connection part (122) and the second side plate (123) are sequentially connected to enclose the cooking cavity (125). The distance from the first side plate (121) to the air outlet hole (1221) is a1, and the distance from the second side plate (123) to the air outlet hole (1221) is a2, and a1≠a2.

6. The cooking device according to claim 2, wherein The ventilation cover (221) further includes a sunken bottom wall (2215) disposed opposite to the air outlet hole (1221). The obstructive side wall (2212) extends along the outer peripheral edge of the sunken bottom wall (2215) and encloses a purification chamber (2216) with the sunken bottom wall (2215). The purification chamber (2216) communicates the air outlet hole (1221) with the first leakage gap (2211), and a purification module is provided in the purification chamber (2216).

7. The cooking device according to claim 1, characterized in that, The flow guide member (21) includes a buffer pipe (211) connected to the outer exhaust connection member (122). The outer exhaust passage includes a buffer chamber (2111) formed in the buffer pipe (211) and communicating with the cooking chamber (125). The obstructive member includes a bent pipe (222) bent and connected to the buffer pipe (211). The outer exhaust leakage gap includes a second leakage gap (2221) formed in the bent pipe (222), and the second leakage gap (2221) communicates the buffer chamber (2111) with the outside of the cooking device.

8. The cooking device according to claim 7, wherein The flow guide member (21) further includes a connecting pipe member (212) bent and connected to the buffer pipe (211). One end of the connecting pipe member (212) away from the buffer pipe (211) is connected to the outer exhaust connection member (122). The outer exhaust passage further includes an exhaust gas flow channel (2121) formed in the connecting pipe member (212). Both ends of the exhaust gas flow channel (2121) communicate with the buffer chamber (2111) and the cooking chamber (125) respectively.

9. The cooking device according to claim 8, wherein, A purification module is provided inside the exhaust gas flow channel (2121).

10. The cooking device according to claim 7, characterized in that, The buffer pipe (211) includes a first connecting portion (2112) and a second connecting portion (2113). The outer exhaust connection member (122) and the bent pipe (222) are respectively connected to the first connecting portion (2112) and the second connecting portion (2113). The distance from the buffer chamber (2111) to the outer exhaust connection member (122) changes in an increasing trend from the first connecting portion (2112) to the second connecting portion (2113).

11. The cooking device according to claim 10, wherein, A climbing angle is formed between the extending direction of the buffer chamber (2111) and the extending direction of the outer exhaust connection member (122). The climbing angle is not less than 3° and not greater than 8°.

12. The cooking device according to claim 7, wherein, The bent pipe (222) extends in a direction away from the outer exhaust connection member (122); and / or The second leakage gap (2221) penetrates through the bent pipe (222) to form an exhaust port (2222), and the cross-sectional area of the second leakage gap (2221) decreases from the buffer pipe (211) to the exhaust port (2222).

13. The cooking device according to any one of claims 1 to 12, characterized in that, The heat accumulation unit (10) further includes a hot air baffle (11) connected to the outer exhaust connection member (122). A hot air unit (30) and a purification module are provided on one side of the hot air baffle (11), and the cooking chamber (125) is formed on the other side of the hot air baffle (11).

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