Cooking equipment

Abstract

The invention provides cooking equipment, the cooking equipment comprises a heat gathering unit and a discharge unit, the heat gathering unit comprises a discharge connecting piece and is provided with a cooking cavity formed at the inner side of the discharge connecting piece, the discharge unit comprises a flow guide piece, the flow guide piece is connected to the discharge connecting piece and is provided with a discharge channel, and the discharge 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 present invention relates to the technical field of kitchenware, and in particular to a cooking device. Background Art

[0002] Baking cooking equipment such as ovens and steam ovens heat and cook food by generating circulating hot air flow through the hot air unit. The hot air flow first flows out of the hot air unit, then passes through the hot air baffle and enters the cooking chamber, then the hot air flow turns around and flows back 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. The above cycle process is repeated several times until the food is cooked.

[0003] It is usually hoped that the hot air flow will remain in the baking and cooking equipment for as long as possible so that the hot air flow can circulate multiple times to fully utilize the heat carried by the hot air flow and avoid the hot air unit frequently heating the air and increasing power consumption. However, the current difficulty lies in the inability to take into account both safety and multiple cycles of the hot air flow. Although limiting the hot air flow from being discharged outward can increase the retention time and number of cycles of the hot air flow in the baking and cooking equipment, a large amount of hot air flow cannot be discharged and accumulates in the cooking cavity, and the air pressure in the cooking cavity increases sharply. When the user opens the cooking cavity and takes out food, he is very likely to be scalded by the hot air flow. Summary of the invention

[0004] In view of this, the present invention provides a cooking device that allows hot air to be discharged outwardly while limiting the rate at which the hot air is discharged outwardly, aiming to take into account both safety when taking food and increasing the number of circulations and retention time of the hot air in the cooking device.

[0005] The cooking device of the present invention includes a heat collection unit and an external discharge unit. The heat collection unit includes an external discharge connection piece and has a cooking cavity formed on the inner side of the external discharge connection piece. The external discharge unit includes a flow guide piece, which is connected to the external discharge connection piece and has an external discharge channel. The external discharge connection piece and the flow guide piece form an exhaust path. The external discharge unit also includes an obstruction piece arranged on the exhaust path. The obstruction piece has an external discharge gap, which connects the cooking cavity and the external discharge channel; and / or the external discharge gap connects the external discharge channel and the outside of the cooking device.

[0006] Compared with the prior art, the cooking device of the present invention has the following beneficial effects:

[0007] 1) The cooking cavity is connected to the outside of the cooking device through the external exhaust channel and the external exhaust gap, allowing the hot air flow to be discharged from the cooking device along the exhaust path, thereby preventing the air pressure in the cooking cavity from increasing sharply, and reducing the risk of the user being scalded by the hot air flow when opening the cooking cavity and taking out food;

[0008] 2) The obstruction member arranged on the exhaust path has an obstructive and interfering effect on the hot air flow, slowing down the speed at which the hot air flow is discharged from the cooking device along the exhaust path, and at the same time increasing the number of circulations of the hot air flow between the hot air unit and the cooking cavity, thereby avoiding the waste caused by the hot air flow being discharged from the cooking device too quickly and too early, and improving the utilization rate of the heat carried by the hot air flow;

[0009] 3) It increases the retention time of the hot air flow in the cooking equipment, prevents temperature and heat fluctuations in the cooking chamber caused by the hot air flow being discharged too quickly, helps reduce the frequency of the hot air unit starting up and heating the air, and reduces the total power consumption required to generate the hot air flow.

[0010] In some embodiments, the external discharge connector is provided with an air outlet hole connected to the external discharge channel, 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 external discharge connector, and the external discharge gap includes a first gap opened on the obstruction side wall, and the first gap connects the cooking cavity and the air outlet hole.

[0011] Such a configuration allows the hot air flow attached to the inner side of the external discharge connecting piece to enter the first gap and thus flow into the external discharge channel until being discharged from the cooking equipment. The blocking side wall has an obstructing 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 to the air outlet is more tortuous and complicated. Therefore, it is relatively difficult for the hot air flow on the blowing path to enter the external discharge channel, which significantly slows down the rate at which the hot air flow in the cooking cavity is discharged to the outside.

[0012] In some embodiments, a hot air unit is further included, a side of the obstruction side wall relatively close to the hot air unit forms a rear side, and another side of the obstruction side wall relatively far from the hot air unit forms a front side, wherein

[0013] The first gaps are all opened on the front side; or, the first gaps include a rear gap and a front gap opened on the rear side and the front side respectively, and the opening of the front gap is larger than the opening of the rear gap.

[0014] With such arrangement, the opening of the first gap is generally facing away from the hot air unit. When the hot air flow is blown into the cooking cavity from the hot air unit, the hot air flow on the blowing path in the cooking cavity is difficult to directly enter the first gap. After the hot air flow on the blowing path reaches the rear side, it bypasses the ventilation cover and continues to flow in the direction away from the hot air unit to prevent the newly generated hot air flow from being discharged outward too quickly. After the hot air flow accumulated in the cooking cavity reaches a certain amount, the air pressure inside the cooking cavity increases, and a part of the hot air flow is squeezed to the front side. At this time, the hot air flow is able to pass through the first gap into the external discharge channel.

[0015] In some embodiments, the external row connector includes a front end and a rear end, the front end is one end of the external row connector relatively far away from the hot air unit, and the rear end is the other end of the external row connector relatively close to the hot air unit, and the distance from the air outlet to the front end is greater than the distance from the air outlet to the rear end.

[0016] With such arrangement, the air outlet is basically located in a dead angle position away 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 and the ventilation cover, ensuring that the newly generated hot air flow can flow along the blowing path until the air pressure inside the cooking cavity increases and a part of the hot air flow is squeezed to the vicinity of the air outlet, and a part of the hot air flow is able to enter the first leakage.

[0017] In some embodiments, the heat collecting unit further includes a first side plate and a second side plate, the first side plate, the outer row connection member and the second side plate are sequentially connected to enclose a cooking cavity, and the distance from the first side plate to the air outlet is a. 1 , the distance from the second side panel to the air outlet is a 2 , a 1 ≠a 2 .

[0018] With such an arrangement, the air outlet is basically located in a dead angle position away 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, thereby further ensuring that the newly generated hot air flow flows along the blowing path without flowing into the first leakage too early.

[0019] In some embodiments, the ventilation cover also includes a sunken bottom wall arranged opposite to the air outlet, and the blocking side wall extends along the outer peripheral edge of the sunken bottom wall and is surrounded by the sunken bottom wall to form a purification chamber, the purification chamber connects the air outlet and the first gap, and a purification module is arranged in the purification chamber.

[0020] With such arrangement, the hot air flow entering the purification chamber from the first gap can be purified and deodorized by the purification module, and then discharged from the cooking equipment after the hot air flow has completed purification and deodorization, so as to alleviate 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 cache tube connected to the external discharge connecting member, the external discharge channel includes a cache cavity formed in the cache tube and connected to the cooking cavity, the obstruction member includes a bent tube bent and connected to the cache tube, and the external discharge leakage includes a second leakage formed in the bent tube, and the second leakage connects the cache cavity with the outside of the cooking device.

[0022] With such arrangement, the hot air flow entering the cache cavity from the cooking cavity can eventually be discharged outwardly from the cooking equipment through the second gap. The bending arrangement of the bent tube relative to the cache tube can block and delay the hot air flow in the cache cavity from entering the second gap. Through the bent tube, the cache cavity is gradually filled with hot air flow, thereby preventing the hot air flow entering the cache cavity from being discharged outwardly too early. At the same time, the inside of the cache cavity can maintain a high-pressure state for a relatively long time, thereby delaying the rate at which the hot air flow enters the cache cavity from the cooking cavity, which helps to increase the number of cycles and residence time of the hot air flow in the cooking equipment.

[0023] In some embodiments, the guide member also includes a connecting piece that is bent and connected to the cache tube, and the end of the connecting piece away from the cache tube is connected to the external discharge connecting piece. The external discharge channel also includes a waste gas flow channel formed in the connecting piece, and the two ends of the waste gas flow channel are respectively connected to the cache cavity and the cooking cavity.

[0024] With such arrangement, the path of the hot air flow from the cooking cavity through the exhaust gas flow duct into the cache cavity is more tortuous, and the hot air flow undergoes a significant flow velocity attenuation after entering the cache cavity from the cooking cavity, which to a certain extent increases the difficulty of the hot air flow from the cooking cavity to enter the cache cavity, thereby helping to increase the number of circulations and residence time of the hot air flow in the cooking equipment.

[0025] In some embodiments, a purification module is disposed inside the exhaust gas flow passage.

[0026] With this arrangement, the hot air flow from the cooking chamber entering the exhaust air flow duct can be purified and deodorized by the purification module, and then enter the cache chamber after the hot air flow has completed purification and deodorization, ultimately alleviating the irritation of the user's mouth and nose to the outwardly discharged hot air flow and improving environmental hygiene.

[0027] In some embodiments, the cache tube includes a first connecting pipe portion and a second connecting pipe portion, and an outer connecting piece and a bending tube respectively connect the first connecting pipe portion and the second connecting pipe portion, and the distance from the cache cavity to the outer connecting piece changes in an increasing trend from the first connecting pipe portion to the second connecting pipe portion.

[0028] With such a configuration, the hot air flow entering the cache cavity can generate an upward acceleration through the heat it carries, and can thus spontaneously flow from the first connecting pipe portion to the second connecting pipe portion until it enters the second leakage, ensuring that the hot air flow entering the cache cavity maintains a trend of flowing toward the second leakage, thereby preventing the hot air flow in the cache cavity from flowing back into the cooking cavity.

[0029] In some embodiments, a climbing angle is formed between an extension direction of the cache cavity and an extension direction of the outer row connector, and the climbing angle is not less than 3° and not more than 8°.

[0030] With such arrangement, the hot air flow in the cache cavity can flow from the first connecting pipe part to the second connecting pipe part at a relatively slow and stable rate, thereby slowly and steadily entering the second leakage gap. During this process, the air pressure in the cache cavity is relatively stable, which can not only ensure that the hot air flow will not flow back into the cooking cavity, but also prevent the hot air flow from being discharged too quickly, causing the air pressure inside the cache cavity to drop rapidly.

[0031] In some embodiments, the cache tube includes a first tube wall and a second tube wall that are spaced apart, the first tube wall is connected to the outer row connector and has a side inlet to connect the cache cavity and the cooking cavity, wherein

[0032] The distance between the first tube wall and the second tube wall is smaller 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 configuration, the cache tube has an overall flat tubular structure, and the hot air flow will experience a significant decrease in flow velocity after entering the cache cavity from the cooking cavity. This is generally beneficial in preventing the hot air flow from being discharged through the second gap too early and too quickly, and the cache cavity can maintain a high-pressure state for a relatively long time.

[0034] In some embodiments, the bent tube extends in a direction away from the outer row of connectors.

[0035] With such arrangement, the bent tube can guide the hot air flow to a position away from the outer exhaust connector, thereby preventing the hot air flow from being discharged too close to the heat collecting unit and causing discomfort to the user.

[0036] In some embodiments, the second leak passes through the bent tube and forms an exhaust port, and a cross-sectional area of ​​the second leak decreases from the cache tube to the exhaust port.

[0037] With this arrangement, the hot air flow entering the second leak can be quickly discharged from the exhaust port, so that the hot air flow accumulated in the cache cavity can continue to flow to the second leak, ensuring that the process of hot air flow being discharged outward is carried out continuously and stably.

[0038] In some embodiments, the heat collection unit further includes a hot air baffle connected to the outer row connection piece, a hot air unit and a purification module are provided on one side of the hot air baffle, and a cooking cavity is formed on the other side of the hot air baffle.

[0039] With such a configuration, as the number of circulations 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 equipment, the odorous components in the hot air are fully filtered out by the purification module, which can alleviate 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A front view of a cooking device according to an embodiment of the present invention;

[0041] Figure 2 for Figure 1 The cooking device shown is a cross-sectional view cut along plane AA;

[0042] Figure 3 for Figure 2 An enlarged view of a partial structure of the cooking device shown;

[0043] Figure 4 A schematic structural diagram of an external discharge unit of a cooking device according to an embodiment of the present invention;

[0044] Figure 5 It is a three-dimensional schematic diagram of a cooking device according to an embodiment of the present invention.

[0045] Figure numerals: 10, heat collecting unit; 11, hot air baffle; 111, return air hole; 112, side air hole; 1131, first side flange; 1132, top flange; 1133, second side flange; 1134, bottom flange; 1135, first oblique flange; 1136, second oblique flange; 1137, third oblique flange; 1138, fourth oblique flange; 12, liner assembly; 121, first side plate; 122, external connection piece; 1221, air outlet; 123, second side plate; 124, bottom plate; 125, cooking cavity; 20, external unit; 21, flow guide; 211, cache tube; 2111, cache cavity; 211 2. First connecting pipe part; 2113. Second connecting pipe part; 2114. First pipe wall; 2115. Second pipe wall; 2116. Side inlet; 212. Connecting pipe; 2121. Waste gas flow channel; 221. Ventilation cover; 2211. First leakage; 2212. Obstruction side wall; 2213. Rear side; 2214. Front side; 2215. Sinking bottom wall; 2216. Purification chamber; 222. Bend pipe; 2221. Second leakage; 2222. Exhaust port; 30. Hot air unit; 31. Fan; 32. Heating element; 40. Back plate; 41. Hot air chamber; 51. First purification module; 52. Second purification module; 53. Ventilation hole. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0048] The present invention provides a cooking device, which may be a baking oven, a steam oven, etc. Figure 1-2 The cooking device of the present invention comprises a heat collecting unit 10, a back plate 40 and a hot air unit 30. The heat collecting unit 10 comprises a hot air baffle 11 and an inner tank assembly 12. The hot air baffle 11 comprises a blowing side and a leeward side arranged opposite to each other. The inner tank 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 tank assembly 12 surround a cooking cavity 125, and the cooking cavity 125 is used to place food and is used as a place where hot air flow heats the food to make the food cooked. A hot air cavity 41 is formed between the leeward side and the back plate 40. The hot air unit 30 is arranged in the hot air cavity 41, and the hot air cavity 41 is used as a place for generating hot air flow. The hot air baffle 11 is provided with a blowing hole and a return air hole 111. The blowing hole and the return air hole 111 penetrate the blowing side and the leeward side, thereby connecting the cooking cavity 125 with 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 also 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. The heating element 32 can be a heating tube surrounding the outside of the fan 31 along the circumferential direction of the rotation axis of the fan 31. The inner pot assembly 12 is a hollow prism structure with an inner pot channel. The extension direction of the inner pot channel is the same as the extension direction of the rotation axis of the fan 31. The hot air baffle 11 is located at one end of the inner pot channel, so that the inner wall surface of the inner pot channel and the blowing side of the hot air baffle 11 surround to form a cooking cavity 125, and the other end of the inner pot channel forms an inner pot opening to facilitate users to take out or put food into the cooking cavity 125.

[0050] See also Figure 1 , Figure 5The 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 liner assembly 12 includes a first side plate 121, a top plate, a second side plate 123 and a bottom plate 124 arranged in sequence along the circumferential direction of the rotation axis, and the inner wall surface of the liner channel includes a side of the first side plate 121 facing the second side plate 123, a side of the top plate facing the bottom plate 124, a side of the second side plate 123 facing the first side plate 121, and a side of the bottom plate 124 facing the top plate. It can be understood that the inner wall surface of the liner assembly 12 is the inner wall surface of the liner channel.

[0051] When using the cooking device to bake food, the hot air unit 30 is first started, the fan 31 rotates and disturbs the air in the hot air cavity 41, and the heating element 32 heats the air thrown out from the fan 31, thereby forming a hot air flow, which passes through the hot air baffle 11 through the blowing hole and enters the cooking cavity 125, and the hot air flow flows in the cooking cavity 125 for a distance and then turns around and flows back to the hot air baffle 11, and the returned hot air flow passes through the hot air baffle 11 from the return air hole 111 as the return air flow and enters the hot air cavity 41, and then the return air flow becomes a hot air flow again under the disturbance of the fan 31. The hot air flow repeats the above process and circulates multiple times between the hot air cavity 41 and the cooking cavity 125, thereby heating the food 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 chamber 41, it only needs to be disturbed again by the fan 31 to become a hot air flow again without being heated again. Only after the hot air flow circulates for many times and the return air flow returning to the hot air chamber 41 drops below a certain temperature, it is necessary to heat this part of the return air flow again to become a hot air flow.

[0052] Therefore, the operation of the hot air unit 30 is as follows: in a complete cooking process of food, the fan 31 rotates continuously to continuously provide power for the circulation of the hot air flow, the heating element 32 starts to operate intermittently, and the heating element 32 stops operating after heating the air in the hot air cavity 41 once, and the hot air flow circulates between the hot air cavity 41 and the cooking cavity 125 for many 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 the heating element 32 operates again. In this way, not only is the heat of the hot air flow fully and efficiently utilized, but the power consumption of the heating element 32 is also reduced, the heating element 32 does not need to operate continuously for a long time, and the fan 31 can be prevented from being roasted for a long time. After the food is cooked, 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 according to a preset circulation path, and the circulation path 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 airflow passing through the hot air baffle 11 through the return air hole 111 is thrown out of the fan 31 in the radial direction of 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 passes through the hot air baffle 11 through the blowing hole and flows in a direction away from the hot air baffle 11, and the return air path refers to the path where the hot air flow turns around and flows back in the cooking cavity 125, thereby flowing toward the return air hole 111 in a direction close to the hot air baffle 11. The hot air flow that contributes to the cooking of food is mainly the hot air flow on the blowing path and the return air path.

[0054] Furthermore, the cooking device of the present invention also includes an external exhaust unit 20, the heat collection unit 10 includes an external exhaust connector 122 with an air outlet 1221, the cooking cavity 125 is formed on the inner side of the external exhaust connector 122 and connected to the air outlet 1221, the external exhaust unit 20 includes a guide member 21 connected to the external exhaust connector 122, the guide member 21 has an external exhaust channel connecting the outside of the cooking device with the air outlet 1221, so that the external exhaust connector 122 and the guide 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 outward along the exhaust path in a concentrated manner after the ingredients are cooked, or it can be discharged outward along the exhaust path intermittently in multiple times during the cooking process. Specifically, part of the hot air flow circulates between the hot air chamber 41 and the cooking chamber 125 for several times and then is discharged outward along the exhaust path, and then the hot air unit 30 continues to replenish and generate the hot air flow. After the hot air flow circulates between the hot air chamber 41 and the cooking chamber 125 for several times again, part of the hot air flow is discharged along the exhaust path again.

[0055] In some embodiments, the top plate of the inner pot assembly 12 is provided with an air outlet 1221 connected to the cooking cavity 125, and the top plate serves as an outer row connection member 122 of the heat collection unit 10. Figure 1-2, the guide member 21 is connected to the outside of the top plate, the cooking cavity 125 is formed on the inside of the top plate, the outside of the top plate is used as the outside of the outer row connection member 122, specifically refers to the side of the top plate relatively far from the bottom plate 124, and the inside of the top plate is used as the inside of the outer row connection member 122, specifically refers to the side of the top plate relatively close to the bottom plate 124. It can be understood that the outer row connection member 122 of the heat collecting unit 10 can also be the first side plate 121 or the second side plate 123. When the first side plate 121 is used as the outer row connection piece 122, the first side plate 121 is provided with an air outlet hole 1221 connected to the cooking cavity 125, the inner side of the outer row connection piece 122 is the side of the first side plate 121 relatively close to the second side plate 123, the guide member 21 is connected to the outer side of the first side plate 121, and the outer side of the first side plate 121 is now the outer side of the outer row connection piece 122, specifically refers to the side of the first side plate 121 relatively far away from the second side plate 123; when the second side plate 123 is used as the outer row connection piece 122, the second side plate 123 is provided with an air outlet hole 1221 connected to the cooking cavity 125, the inner side of the outer row connection piece 122 is the side of the second side plate 123 relatively close to the first side plate 121, the guide member 21 is connected to the outer side of the second side plate 123, and the outer side of the second side plate 123 is now the outer side of the outer row connection piece 122, specifically refers to the side of the second side plate 123 relatively far away from the first side plate 121.

[0056] Obviously, it is necessary to discharge the hot air flow from the cooking cavity 125 to the outside, otherwise the hot air flow will remain 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 significantly increasing. When the user opens the cooking cavity 125 and tries to take out the food, the user can easily be burned by the high-temperature and high-pressure hot air in the cooking cavity 125. However, due to the existence of the air outlet 1221 and the external exhaust channel, it is difficult for the hot air flow to remain in the cooking device for a long time. In most cases, the hot air flow circulates between the hot air chamber 41 and the cooking chamber 125 for only a small number of times and is then prematurely discharged through the guide member 21. The heat carried in the hot air flow is not efficiently utilized, and the temperature and amount of hot air in the cooking chamber 125 fluctuate violently. In order not to affect the cooking efficiency of the food, the heating element 32 has to be started frequently or even run continuously, so as to continuously heat the air flow thrown out from the fan 31 to continuously replenish the hot air flow in the cooking chamber 125. Therefore, the power consumption of the existing cooking equipment 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 improvement of the cooking device of the present invention includes: the external exhaust unit 20 also includes an obstruction member, which is arranged on the exhaust path formed by the external exhaust connection member 122 and the flow guide member 21 and has an external exhaust gap, wherein the external exhaust gap connects the cooking cavity 125 with the external exhaust channel; and / or the external exhaust gap connects the external exhaust channel with the outside of the cooking device. In this way, the cooking cavity 125 connects to the outside of the cooking device through the external exhaust channel and the external exhaust gap, thereby allowing the hot air flow to be discharged from the cooking device along the exhaust path. The obstruction member arranged on the exhaust path can hinder and interfere with the hot air flow, delay the speed of the hot air flow being discharged along the exhaust path, reduce the amount of hot air flow discharged to the outside in the same time, prolong the retention time of the hot air flow in the cooking device, increase the number of cycles of the hot air flow between the hot air cavity 41 and the cooking cavity 125, improve the utilization rate of the heat carried by the hot air flow, avoid the hot air flow being discharged too quickly and too early, reduce the temperature fluctuation amplitude in the cooking cavity 125, and the heating unit does not need to be started frequently, thereby 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 1221. Figure 2-Figure 3 The ventilation cover 221 is installed on the outer row connection piece 122 formed by the top plate. The ventilation cover 221 includes a blocking side wall 2212 and a sinking bottom wall 2215. The blocking side wall 2212 is protruding from the inner side of the outer row connection piece 122. The sinking bottom wall 2215 is connected to an end of the blocking side wall 2212 relatively far from the top plate and is arranged opposite to the air outlet 1221 opened on the top plate. The blocking side wall 2212 and the sinking bottom wall 2215 are surrounded together to form a purification chamber 2216. The outer row leakage includes a first leakage 2211 opened on the blocking side wall 2212. The cooking chamber 125, the first leakage 2211, the purification chamber 2216, the air outlet 1221 and the outer row channel are sequentially connected. The ventilation cover 221 forms a boss structure protruding from the top plate near the bottom plate 124. For the hot air flow flowing along the blowing path, the boss structure makes the flow path of the hot air flow entering the air outlet 1221 and then flowing into the external discharge channel more tortuous and complicated. In other words, the hot air flow flowing along the blowing path is not easy to be discharged outward, which slows down the external discharge 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, and a part of the hot air flow is squeezed to the inside of the external discharge connector 122. At this time, the hot air flow attached to the inside of the external discharge connector 122 will pass through the first leak 2211 into the purification cavity 2216, and then enter the air outlet 1221 and the external discharge channel.

[0059] See also Figure 3 and Figure 4In some embodiments, the obstructing side wall 2212 includes a front side 2214 and a rear side 2213, the front side 2214 is a side of the obstructing side wall 2212 relatively far away from the hot air unit 30 and the hot air baffle 11, and the rear side 2213 is a side of the obstructing side wall 2212 relatively close to the hot air unit 30 and the hot air baffle 11, and the first gaps 2211 are all opened on the front side 2214. Therefore, the hot air flow flowing 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 distance in the direction away from the hot air unit 30 and the hot air baffle 11, that is, the hot air flow flowing along the blowing path will not immediately enter the first gap 2211 even if it reaches the surface of the obstructing side wall 2212, and 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 enter the first gap 2211. Such an arrangement enables the hot air flow to intermittently flow into the external exhaust channel through the first leakage 2211, that is, only after the hot air flow circulates between the hot air chamber 41 and the cooking chamber 125 several times, a part of the hot air flow will be discharged, and when the air pressure in the cooking chamber 125 drops slightly, the external exhaust of the hot air flow is suspended until the hot air flow circulates between the hot air chamber 41 and the cooking chamber 125 several times again, and only then will a part of the hot air flow continue to be discharged.

[0060] In other embodiments, the first leak 2211 includes a rear leak opened at the rear side 2213 and a front leak opened at the front side 2214, and the opening of the front leak is larger than the opening of the rear leak. With such a configuration, most of the hot air flow that enters the first leak 2211 and then enters the external exhaust channel is squeezed into the front leak as the air pressure in the cooking cavity 125 increases, and only a small amount of hot air flow that flows along the blowing path enters the rear leak, thereby preventing the newly generated hot air flow from being discharged outward too early and excessively.

[0061] Optionally, see Figure 2-Figure 3 , the purification component also includes a second purification module 52, at least part of which is disposed in the purification chamber 2216. The part of the second purification module 52 located in the purification chamber 2216 cooperates with the inner wall of the purification chamber 2216, and is provided with a ventilation hole 53 connecting the purification chamber 2216 with the external exhaust channel. In this way, the hot air flow entering the purification chamber 2216 from the first leak 2211 can be purified and deodorized by the second purification module 52. Before the hot air flow enters the external exhaust channel and becomes the exhaust air flow, the hot air flow is again filtered out of the odor components by the second purification module 52, and the odor concentration of the exhaust air flow finally discharged to the outside of the cooking device is further reduced to alleviate the irritation to the user's mouth and nose, and further reduce the impact of the exhaust air 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 row connection member 122 can enter the first 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 row connection member 122 is relatively easier to enter the first gap 2211. Taking the top plate as the outer row connection member 122 as an example, the opening of the first gap 2211 is away from the hot air baffle 11 and the hot air unit 30, and the opening of the air outlet 1221 is set toward the bottom plate 124, that is, the opening direction of the first gap 2211 is perpendicular to the opening direction of the air outlet 1221. Therefore, after the hot air flow enters the first gap 2211, it needs to turn before it can enter the air outlet 1221. Of course, not only the obstruction side wall 2212 has an obstruction effect on the hot air flow, but the second purification module 52 also has an obstruction and deceleration effect on the hot air flow.

[0063] Further, see Figure 2 and Figure 5 Regardless of whether the first side panel 121, the top panel or the second side panel 123 has an air outlet 1221 and is used as an external connection member 122, the external connection member 122 includes a front end and a rear end that are arranged opposite to each other. The front end is an end of the external connection member 122 that is relatively far away from the hot air baffle 11 and the hot air unit 30, and the rear end is an end of the external connection member 122 that is 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 pot opening, and the distance from the air outlet 1221 to the front end is greater than the distance from the air outlet 1221 to the rear end. In this way, the air outlet 1221 is located in a dead angle position away 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 1221 and the ventilation cover 221, and immediately flow along the blowing path, ensuring that the newly generated hot air flow will not enter the external discharge channel too early. When the top panel has an air outlet 1221 and is used as an external connection member 122, as Figure 5 As shown, the distance from the first side plate 121 to the air outlet 1221 / ventilation cover 221 is a 1 , the distance from the second side plate 123 to the air outlet 1221 / ventilation cover 221 is a 2 , a 1 ≠a 2 With such arrangement, the distance between the hot air flow flowing along the blowing path and the air outlet 1221 / ventilation cover 221 is further, and the newly generated hot air flow can smoothly avoid the first leak 2211 and the air outlet 1221 to prevent it from being discharged too early or too quickly.

[0064] In some embodiments, the flow guide 21 includes a buffer tube 211 connected to the outside of the outer connection member 122, the outer channel includes a buffer cavity 2111 formed in the buffer tube 211, the obstruction member also includes a bent tube 222 bent and connected to the buffer tube 211, the outer leakage also includes a second leakage 2221 formed in the bent tube 222, and the cooking cavity 125, the air outlet 1221, the buffer cavity 2111, and the second leakage 2221 are connected in sequence. In this arrangement, the hot air flow entering the buffer cavity 2111 from the cooking cavity 125 can eventually be discharged from the cooking device through the second leakage 2221. For the convenience of description, the hot air flow entering the buffer tube 211 is called the exhaust air flow. The bending tube 222 as an obstruction piece is at the very end of the exhaust path. When the exhaust gas flows along the buffer cavity 2111 to the second leak 2221, it will be blocked by the inner wall of the bending tube 222 and turned. Therefore, the bending tube 222 can suppress the exhaust gas from entering the second leak 2221 too quickly and being discharged outward. Through the bending tube 222, the exhaust gas gradually fills the buffer cavity 2111 and stays in the buffer cavity 2111 longer, and the air pressure in the buffer cavity 2111 gradually increases. The increase in the air pressure inside the buffer cavity 2111 can slow down the rate at which the hot air flow enters 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 extending the residence time of the hot air flow in the cooking equipment.

[0065] Specifically, the flow guide 21 further includes a connecting pipe 212 bent and connected to the buffer pipe 211, and the external discharge channel further includes an exhaust gas flow channel 2121 formed inside the connecting pipe 212. Figure 2 to Figure 4The cache pipe 211 includes a first connecting pipe portion 2112 and a second connecting pipe portion 2113. One end of the connecting pipe 212 is connected to the first connecting pipe portion 2112, and the other end of the connecting pipe 212 is connected to the outside of the outer connection member 122. One end of the bending pipe 222 is connected to the second connecting pipe portion 2113, and the other end of the bending pipe 222 extends in a direction away from the outer connection member 122. The second gap 2221 penetrates the end of the connecting pipe 212 that is relatively far away from the second connecting pipe portion 2113 to form an exhaust port 2222. The two ends of the exhaust flow channel 2121 are respectively connected to the cache cavity 2111 and the air outlet 1221. With such arrangement, the inner side of the outer connection piece 122, the connecting piece 212 and the cache tube 211 form a more tortuous exhaust path, and the hot air flows along the inner side of the outer connection piece 122, the air outlet hole 1221, the waste gas flow channel 2121, the cache cavity 2111, the second gap 2221 and is finally discharged 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 cache cavity 2111 from the waste gas flow channel 2121, and the last turn occurs when entering the second gap 2221 from the cache cavity 2111. The flow velocity of the hot air flow decays significantly, which increases the difficulty of the hot air flow entering the cache cavity 2111 from the cooking cavity 125, thereby helping to increase the number of circulations and residence time of the hot air flow in the cooking equipment.

[0066] See also Figure 3-4 The top plate of the liner assembly 12 serves as an external connection piece, and the cache tube 211 is a flat tubular structure, including a first tube wall 2114 and a second tube wall 2115 that are spaced apart. The cache cavity 2111 is formed between the first tube wall 2114 and the second tube wall 2115. The first tube wall 2114 is provided with a side inlet 2116, and the second tube wall 2115 is located on a side of the first tube wall 2114 that is relatively far from the external connection piece 122. One end of the pipe connection piece 212 that is relatively far from the external connection piece 122 is sealedly connected to the opening edge of the side inlet 2116, so that the side inlet 2116 connects the cache cavity 2111 and the exhaust gas flow channel 2121, and the opening edge of the side inlet 2116 forms a first pipe connection portion 2112. The distance from the cache cavity 2111 to the outer row connection member 122 changes in an increasing trend from the first connecting pipe portion 2112 to the second connecting pipe portion 2113. The distance from the cache cavity 2111 to the outer row connection member 122 is the distance from the side of the first tube wall 2114 toward the second tube wall 2115 to the outer row connection member 122. Therefore, a climbing angle is formed between the extension direction of the cache cavity 2111 and the extension direction of the outer row connection member 122. The minimum value of the climbing angle is 3°, and the maximum value of the climbing angle is 8°.

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

[0068] Optionally, see Figure 3 The purification component also includes a second purification module 52, at least part of which is arranged inside the waste gas flow channel 2121. The part of the second purification module 52 located inside the waste gas flow channel 2121 cooperates with the inner wall of the waste gas flow channel 2121, and is provided with a ventilation hole 53 connecting the cooking cavity 125 and the cache cavity 2111. When the waste gas flows through the ventilation hole 53, the odor components in the waste gas flow are filtered and adsorbed by the second purification module 52. In this way, the waste gas flow can be purified and deodorized by the second purification module 52 before entering the cache cavity 2111, and the odor concentration of the waste gas flow finally discharged to the outside of the cooking device is further reduced, which can alleviate the irritation of the waste gas flow to the user's mouth and nose, and reduce the pollution of the waste gas flow to the environment.

[0069] In some embodiments, the second purification module 52 can react chemically with 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 odor components, and the temperature of the hot air flow can increase the activity of the second purification module 52, thereby improving the second purification module 52's ability to intercept and adsorb odor components.

[0070] Optionally, see Figure 3-4, the cross-sectional area of ​​the second leak 2221 changes in a decreasing trend from the second connecting pipe 2113 to the exhaust port 2222, the second connecting pipe 2113 includes a pipe section with an arc-shaped tubular structure, and the buffer cavity 2111 and the second leak 2221 are connected through the inner cavity of the second connecting pipe 2113 and realize an arc transition. In this way, after the exhaust gas flow enters the second leak 2221 from the inner cavity of the second connecting pipe 2113, it can flow outward quickly with a smaller flow rate and a higher flow rate, so as to ensure that the exhaust gas flow is discharged smoothly to the outside, avoid blockage when the exhaust gas flow flows outward, and prevent the gas pressure in the buffer cavity 2111 from suddenly rising and causing the exhaust gas flow to flow back. In the case where the top plate is used as the external connection member 122, the bent pipe 222 extending upward in a direction away from the external connection member 122 can guide the exhaust gas flow upward so that the exhaust gas flow is absorbed by the range hood located above the cooking device.

[0071] Optionally, see Figure 4 The distance between the first tube wall 2114 and the second tube wall 2115 is smaller than the width of the first tube wall 2114 and the second tube wall 2115 , and the width of the first tube wall 2114 and the second tube wall 2115 is not less than twice the diameter of the side inlet 2116 . With such an arrangement, the cache tube 211 is closer to a flat tubular structure as a whole, and the cache cavity 2111 is a flat cavity. After the exhaust gas flows through the exhaust gas flow channel 2121 and enters the cache cavity 2111, it immediately collides with the second tube wall 2115, which greatly reduces the flow velocity of the exhaust gas flow. The exhaust gas flow then diffuses and overflows laterally along the first tube wall 2114 to gradually fill the cache cavity 2111. This can prevent the exhaust gas flow from entering the second leakage gap 2221 too early and too quickly, and enable the cache cavity 2111 to maintain a high-pressure state for a longer period of time. In general, the air pressure in the cache 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 cache cavity 2111, and then to the external environment of the cooking device, an overall gradually decreasing air pressure distribution is established.

[0072] Furthermore, in view of the fact that the odor components in the food will diffuse into the hot air flow, and the diffusion amount will increase as the number of cycles of the hot air flow in the cooking device increases, resulting in the hot air flow being pungent and unpleasant, the purification component also includes a first purification module 51 disposed in the hot air cavity 41. In this way, the odor components of the return air flow entering the hot air cavity 41 and the air accumulated in the hot air cavity 41 can be filtered out by the first purification module 51, so that the concentration of the odor components of the newly generated hot air flow in the hot air cavity 41 is reduced, and the first purification module 51 purifies and removes the odor of the hot air flow, so that the hot air is not likely to give the user a strong pungent feeling after being discharged from the cooking device, thereby reducing the impact of the discharged hot air on the environment.

[0073] See also Figure 2In 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 and blades connected to the main body, the main body is arranged opposite to the return air part, the hot air unit 30 also includes a driving member connected to the main body of the fan 31, the driving member can drive the fan 31 to rotate around a preset rotation center, the preset rotation center is used as the rotation axis of the fan 31, the outer peripheral side of the fan 31 includes the end of the blade relatively far away from the preset rotation center, when the fan 31 rotates, it will suck air so that the air will flow back along the extension direction of the preset rotation center close to the main body, and then the sucked air is pushed by the blades and accelerated, and finally the air is thrown out of the end of the fan 31 under the centrifugal action, therefore, the outer peripheral side of the fan 31 composed of the blade ends is the air outlet of the fan 31, after leaving the fan 31, the airflow will flow to the first purification module 51 and be filtered out of the odor components by the first purification module 51, and then the airflow will be blown to the cooking cavity 125 as hot air flow.

[0074] Specifically, see 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 of the heating element 32 relatively far from the fan 31. In this configuration, 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 become hot air flow, and 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. In other words, 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 the odor components, and the hot air flow passing 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 the odor components, and the temperature of the hot air flow can increase the activity of the first purification module 51, thereby improving the first purification module 51's ability to intercept and adsorb odor components.

[0076] Optionally, see Figure 2, the heating element 32 is a heating tube, the heating tube includes a closed-loop tube section surrounding the fan 31 along the circumferential direction of the rotation axis of the fan 31, the first purification module 51 is a closed-loop structure, and the first purification module 51 surrounds the outer peripheral side of the closed-loop tube section along the circumferential direction of the rotation axis of the fan 31, that is, the first purification module 51 itself has a hollow area, and the fan 31 and the closed-loop tube section are both accommodated in the hollow area of ​​the first purification module 51. Preferably, the closed-loop tube section and the first purification module 51 are both annular 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 thrown out from each radial direction of the fan 31 can be heated by the heating element 32, and the air thrown out from each radial direction of the fan 31 can be filtered out of odor components by the first purification module 51, the purification and deodorization effect is improved, and part of the hot air flow is prevented from missing the first purification module 51.

[0077] Optionally, see Figure 2 The two ends of the first purification module 51 are respectively in contact with the leeward side of the hot air baffle 11 and the side of the back plate 40 facing the hot air baffle 11, so that 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. Accordingly, the first purification module 51 is provided with a ventilation hole 53, which penetrates one side of the first purification module 51 relatively close to the fan 31 and also penetrates the other 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 together surround a closed space area, and the closed space area and the cooking cavity 125 are connected only through the return air hole 111, and the closed space area and the hot air cavity 41 located outside the first purification module 51 are connected only through the ventilation holes 53 of the first purification module 51. This means that the return airflow entering the closed space area and the air accumulated in the closed space area can only be diffused 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 hot air flows thrown out of the fan 31 can flow through the first purification module 51 so that the odor components are fully filtered out by the first purification module 51, thereby significantly improving the deodorization and purification effect.

[0079] The ventilation holes 53 may be mesh holes extending radially along the first purification module 51, and the mesh holes are evenly distributed along the circumference of the first purification module 51. One end of each ventilation hole 53 relatively close to the rotation axis of the fan 31 passes through the inner peripheral side of the first purification module 51, which is the side of the first purification module 51 relatively close to the fan 31 and the heating element 32. The other end of each ventilation hole 53 relatively far from the rotation axis of the fan 31 passes through the outer peripheral side of the first purification module 51, which 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 hole 53 serves as the main surface of the first purification module 51 to filter out odor components, which significantly increases the contact area between the first purification module 51 and the hot air flow.

[0080] See also Figure 1 , Figure 5 In some embodiments, a portion 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 portion is located in the inner tank channel, and the hot air baffle 11 also includes a flange portion, which is bent and connected to the outer peripheral edge of the baffle portion and protrudes from the side of the baffle portion facing the back plate 40, and the end of the flange portion relatively far from the outer peripheral edge of the baffle portion is connected to the back plate 40, and the flange portion is spaced apart from the inner wall surface of the inner tank channel, and the blowing hole includes a side blowing hole 112 opened in the flange portion, and the opening of the side blowing hole 112 faces the inner wall surface of the inner tank channel. Preferably, the flange portion is a closed loop structure extending along the outer peripheral edge of the baffle portion, and the flange portion surrounds the baffle portion and surrounds the hot air unit 30 along the circumferential direction of the rotation axis of the fan 31, and the outer peripheral side of the first purification module 51 faces the inner peripheral wall of the flange portion.

[0081] Specifically, Figure 1As shown, the outer periphery of the baffle portion is approximately octagonal, including a first side, a first oblique side, a top side, a second oblique side, a second side, a third oblique side, a bottom side, and a fourth oblique side arranged in sequence along the circumferential direction of 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 oblique convex edge 1135 bent and connected to the first oblique side, a top convex edge 1132 bent and connected to the top edge, a second oblique convex edge 1136 bent and connected to the second oblique side, a second side convex edge 1133 bent and connected to the second side edge, a third oblique convex edge 1137 bent and connected to the third oblique side, a bottom convex edge 1134 bent and connected to the bottom edge, and a fourth oblique convex edge 1138 bent and connected to the fourth oblique side. The side of the first side plate 121 facing the second side plate 123 is spaced apart from the first side flange 1131, the side of the top plate facing the bottom plate 124 is spaced apart from the top flange 1132, the side of the second side plate 123 facing the first side plate 121 is spaced apart from the second side flange 1133, and the side of the bottom plate 124 facing the top plate is spaced apart from the bottom flange 1134. Two ends of the first oblique convex edge 1135 are respectively connected to the first side convex edge 1131 and the top convex edge 1132, and the side of the first oblique convex edge 1135 away from the hot air unit 30 is toward the angle between the first side plate 121 and the top plate, two ends of the second oblique convex edge 1136 are respectively connected to the top convex edge 1132 and the second side convex edge 1133, and the side of the second oblique convex edge 1136 away from the hot air unit 30 is toward the angle between the top plate and the second side plate 123, two ends of the third oblique convex edge 1137 are respectively connected to the second side convex edge 1133 and the bottom convex edge 1134, and the side of the third oblique convex edge 1137 away from the hot air unit 30 is toward the angle between the second side plate 123 and the bottom plate 124, and two ends of the fourth oblique 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 oblique convex edge 1138 away from the hot air unit 30 is toward the angle between the bottom plate 124 and the first side plate 121.

[0082] Alternatively, if Figure 1 , Figure 5As shown, the side blowing air holes 112 are opened in any one or more of the first side flange 1131, the top flange 1132, the second side flange 1133 and the bottom flange 1134; the first inclined flange 1135, the second inclined flange 1136, the third inclined flange 1137 and the fourth inclined flange 1138 are not provided with side blowing air holes 112. Such a configuration not only does not affect the hot air flow passing through the hot air baffle 11 and blowing toward the cooking cavity 125, but also can inhibit the hot air flow from flowing toward the dead corner area of ​​the inner wall surface of the inner pot channel, so that the hot air flow along the blowing path avoids the air outlet hole 1221, and the air outlet hole 1221 is usually opened in the dead corner area of ​​the inner wall surface of the inner pot channel, thereby helping to increase the number of circulations of the hot air flow. The dead corners of the inner wall surface include the angle between the first side plate 121 and the top plate, the angle between the top plate and the second side plate 123, the angle between the second side plate 123 and the bottom plate 124, and the angle between the bottom plate 124 and the first side plate 121. Especially when the air outlet holes 1221 are opened 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 suppress the hot air flow from flowing toward the air outlet holes 1221, and prevent the hot air flow from entering the external exhaust channel and being discharged from the cooking equipment too early and too quickly from the air outlet holes 1221, thereby increasing the number of circulations of the hot air flow.

[0083] It can be understood that when the top plate is used as the outer row connection member 122, and the top plate is provided with an air outlet 1221 in the area close to the hot air baffle 11 and the first side plate 121, the distance from the air outlet 1221 to the front end of the top plate is greater than the distance from the air outlet 1221 to the rear end of the top plate, and the distance from the first side plate 121 to the air outlet 1221 is a. 1 , the distance from the second side plate 123 to the air outlet 1221 is a 2 , a 1 <a 2 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 a 1 Greater than a 2 At this time, the second inclined convex edge 1136 plays a role in suppressing the hot air from flowing toward the air outlet 1221.

[0084] Optionally, in some embodiments, the blowing holes further include a positive blowing hole provided in the baffle portion, and the hot air flow passing through the positive blowing hole can be directly blown toward the cooking cavity 125 and then directly flow toward the opening of the inner pot. In contrast, due to the wall attachment effect of the fluid, the hot air flow passing through the side blowing hole 112 mainly flows along the inner wall surface of the inner pot channel. Therefore, the hot air flow passing through the positive blowing hole is responsible for directly baking the food, while the hot air flow passing through the side blowing hole 112 is more used to form a heat flow field occupying the cooking cavity 125, and the heat flow field surrounds the food. The above two hot air flows cooperate to ensure that the food is fully heated and cooked. The side blowing hole 112 provided in the convex edge portion is 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 of radial flow along the rotation axis of the fan 31. With the radial velocity vector, most of the hot air flow is directly blown toward the inner side of the convex edge portion toward the hot air unit 30, and then directly passes through the side blowing hole 112 until it reaches the inner wall surface of the inner pot channel. Of course, the positive blowing holes on the baffle portion may also be eliminated.

[0085] Furthermore, no matter the blowing hole is a front blowing hole opened in the baffle part, or a side blowing hole 112 opened in the convex edge part, or both the front blowing hole and the side blowing hole 112, the shortest distance from the blowing hole to the rotation axis is not less than the longest distance from the first purification module 51 to the rotation axis. Figure 2 The distance between the side blowing holes 112 opened in the convex edge and the rotation axis of the fan 31 is greater than the distance between the outer peripheral side of the first purification module 51 and the rotation axis of the fan 31. If the blowing side of the hot air baffle 11 is observed in a line of sight parallel to the rotation axis of the fan 31, as shown in FIG. Figure 1 As shown, then, the projection of the blowing hole on the parallel surface of the hot air baffle 11 is the projection of the air outlet opening, the projection of the first purification module 51 on the parallel surface of the hot air baffle 11 is the projection of the deodorization position, and the projection of the return air hole 111 on the parallel surface of the hot air baffle 11 is the projection of the return air opening, and it is stipulated that the parallel surface of 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 deodorization position is a closed loop figure, the projection of the air outlet opening is all located outside the projection of the deodorization position, and the projection of the return air opening is all located inside the projection of the deodorization position. In this way, all the return airflows entering the hot air cavity 41 through the return air hole 111 pass through the first purification module 51 and reach the outer peripheral side of the first purification module 51, and the hot airflows blowing from the blowing hole to the cooking cavity 125 pass through the first purification module 51.

[0086] The cooking device of the present invention arranges the first purification module 51 in the hot air chamber 41. When the user takes out food from the cooking chamber 125 or puts food into the cooking chamber 125, the first purification module 51 will not interfere with it. At the same time, it also avoids the first purification module 51 from being contaminated by food, and can keep the first purification module 51 clean for a longer time without frequent cleaning or replacement.

[0087] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0088] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments are within the scope of protection claimed by the present invention.

Claims

1. A cooking device, It is characterized in that The invention comprises a heat collecting unit (10) and an external exhaust unit (20), wherein the heat collecting unit (10) comprises an external exhaust connection member (122) and has a cooking cavity (125) formed on the inner side of the external exhaust connection member (122), and the external exhaust unit (20) comprises a flow guide member (21) and an obstruction member, wherein the flow guide member (21) is connected to the external exhaust connection member (122) and has an external exhaust channel, wherein the external exhaust connection member (122) and the flow guide member (21) form an exhaust path, wherein the obstruction member is arranged on the exhaust path and has an external exhaust gap, wherein the external exhaust gap connects the cooking cavity (125) and the external exhaust channel; and / or wherein the external exhaust gap connects the external exhaust channel and the outside of the cooking device.

2. The cooking device according to claim 1, It is characterized in that The outer row connection piece (122) is provided with an air outlet (1221) connected to the outer row channel, the obstruction piece includes a ventilation cover (221) covering the air outlet (1221), the ventilation cover (221) includes an obstruction side wall (2212) protruding from the inner side of the outer row connection piece (122), and the outer row leakage includes a first leakage (2211) provided on the obstruction side wall (2212), and the first leakage (2211) connects the cooking cavity (125) and the air outlet (1221).

3. The cooking device according to claim 2, It is characterized in that It also includes a hot air unit (30), wherein the side of the obstructing side wall (2212) relatively close to the hot air unit (30) forms a rear side (2213), and the other side of the obstructing side wall (2212) relatively far from the hot air unit (30) forms a front side (2214), wherein The first gaps (2211) are all opened on the front side (2214); or, The first leakage gap (2211) includes a rear leakage gap and a front leakage gap respectively opened on the rear side (2213) and the front side (2214), and the opening of the front leakage gap is larger than the opening of the rear leakage gap.

4. The cooking device according to claim 3, It is characterized in that The outer row connection piece (122) comprises a front end and a rear end, the front end being one end of the outer row connection piece (122) relatively far away from the hot air unit (30), and the rear end being the other end of the outer row connection piece (122) relatively close to the hot air unit (30), and the distance from the air outlet (1221) to the front end is greater than the distance from the air outlet (1221) to the rear end.

5. The cooking device according to claim 4, It is characterized in that The heat collecting unit (10) further comprises a first side plate (121) and a second side plate (123), wherein the first side plate (121), the outer row connection piece (122) and the second side plate (123) are sequentially connected to enclose the cooking cavity (125), and the distance between the first side plate (121) and the air outlet (1221) is a. 1 , the distance from the second side plate (123) to the air outlet (1221) is a 2 , a 1 ≠a 2 .

6. The cooking device according to claim 2, It is characterized in that The ventilation cover (221) also includes a sunken bottom wall (2215) arranged opposite to the air outlet (1221), and the obstruction side wall (2212) extends along the outer peripheral edge of the sunken bottom wall (2215) and surrounds the sunken bottom wall (2215) to form a purification chamber (2216), and the purification chamber (2216) is connected to the air outlet (1221) and the first leakage gap (2211), and a purification module is arranged in the purification chamber (2216).

7. The cooking device according to claim 1, It is characterized in that The flow guide (21) includes a cache tube (211) connected to the external discharge connection member (122), the external discharge channel includes a cache cavity (2111) formed in the cache tube (211) and connected to the cooking cavity (125), the obstruction member includes a bent tube (222) bent and connected to the cache tube (211), and the external discharge gap includes a second gap (2221) formed in the bent tube (222), and the second gap (2221) connects the cache cavity (2111) with the outside of the cooking device.

8. The cooking device according to claim 7, It is characterized in that The guide member (21) also includes a connecting member (212) bent and connected to the cache tube (211), and one end of the connecting member (212) away from the cache tube (211) is connected to the external connection member (122), and the external channel also includes a waste gas flow channel (2121) formed in the connecting member (212), and the two ends of the waste gas flow channel (2121) are respectively connected to the cache cavity (2111) and the cooking cavity (125).

9. The cooking device according to claim 8, It is characterized in that A purification module is provided inside the exhaust gas flow passage (2121).

10. The cooking device according to claim 7, It is characterized in that The cache tube (211) includes a first connecting pipe portion (2112) and a second connecting pipe portion (2113); the outer connecting piece (122) and the bending tube (222) respectively connect the first connecting pipe portion (2112) and the second connecting pipe portion (2113); the distance from the cache cavity (2111) to the outer connecting piece (122) changes in an increasing trend from the first connecting pipe portion (2112) to the second connecting pipe portion (2113).

11. The cooking device according to claim 10, It is characterized in that A climbing angle is formed between the extension direction of the cache cavity (2111) and the extension direction of the outer row connection piece (122), and the climbing angle is not less than 3° and the climbing angle is not greater than 8°.

12. The cooking device according to claim 7, It is characterized in that The bent tube (222) extends in a direction away from the outer row of connecting pieces (122); and / or, The second leak (2221) passes through the bent tube (222) to form an exhaust port (2222), and the cross-sectional area of ​​the second leak (2221) decreases from the cache tube (211) to the exhaust port (2222).

13. The cooking device according to any one of claims 1 to 12, It is characterized in that The heat collection unit (10) further comprises a hot air baffle (11) connected to the outer row connection piece (122); a hot air unit (30) and a purification module are provided on one side of the hot air baffle (11); and the cooking cavity (125) is formed on the other side of the hot air baffle (11).

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