CN219813869U - Cooking electric appliance - Google Patents

Abstract

The embodiment of the utility model provides a cooking appliance which comprises a box body, an air duct system, a cavity upper plate, a heating assembly and a fan assembly. The box body is provided with a cooking cavity; the air duct system comprises a heat dissipation air duct and a hot air duct, at least part of the heat dissipation air duct is arranged at the top of the box body, the hot air duct is arranged between the cooking cavity and the heat dissipation air duct positioned at the top of the box body, and the heat dissipation air duct is provided with a second air outlet; the cavity upper plate is positioned at the top of the cooking cavity, the heating pipe is arranged on the cavity upper plate, and at least the heating part of the heating pipe is positioned in the cooking cavity and below the cavity upper plate; the fan assembly comprises a first fan blade arranged in the hot air duct and a second fan blade arranged in the heat dissipation duct, air flow in the hot air duct flows to the heating part through the first air outlet, and air flow in the heat dissipation duct flows to the outside through the second air outlet. According to the cooking appliance provided by the embodiment of the utility model, the heating part is arranged in the cooking cavity and below the upper plate of the cavity, so that the heat utilization rate is improved and the cooking effect is improved.

Description

Cooking electric appliance

Technical Field

The utility model relates to the technical field of kitchen equipment, in particular to a cooking electric appliance.

Background

As a main kitchen appliance for daily cooking, a cooking appliance such as an electric oven has become an indispensable member in modern home kitchens. In the related art, the hot air duct of oven generally sets up in the back of oven, and the heat dissipation wind channel is at the top of oven, and occupation space is big, and the cost is higher for the oven volume increases, thereby has reduced user and has used experience and feel, and in addition, fan blade and heating pipe all set up in the hot air duct, and the air current of hot air duct is not direct blowing to the heating pipe, has the problem that heat utilization rate is low.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a cooking appliance capable of improving heat utilization and cooking effect.

To achieve the above object, an embodiment of the present utility model provides a cooking appliance, including:

the box body is provided with a cooking cavity;

the air duct system comprises a heat dissipation air duct and a hot air duct, at least part of the heat dissipation air duct is arranged at the top of the box body, the hot air duct is arranged between the cooking cavity and the heat dissipation air duct positioned at the top of the box body, and the heat dissipation air duct is provided with a second air outlet;

the cavity upper plate is positioned at the top of the cooking cavity, a first air outlet is formed in the cavity upper plate, and the cooking cavity is communicated with the hot air duct through the first air outlet;

the heating assembly comprises at least one heating pipe, the heating pipe is arranged on the cavity upper plate, and at least the heating part of the heating pipe is positioned in the cooking cavity and below the cavity upper plate;

the fan assembly comprises a first fan blade arranged in the hot air duct and a second fan blade arranged in the heat dissipation duct, air in the hot air duct flows through the first air outlet to the heating part under the action of the first fan blade, and air in the heat dissipation duct flows through the second air outlet to the outside under the action of the second fan blade.

In one embodiment, a partial area of the cavity upper plate is recessed downwards to form a first avoidance area, and the first fan blade is arranged in the first avoidance area.

In one embodiment, at least part of the first air outlet is formed on the side wall of the first avoidance area.

In one embodiment, the cavity upper plate includes a guiding surface located at a side of the first air outlet away from the first fan blade, and at least part of the air flow flowing out of the first air outlet can be guided to the heating portion through the guiding surface.

In one embodiment, the cavity upper plate is located at one side of the first air outlet away from the first fan blade, and is recessed downwards to form a guide groove, and a side surface of the guide groove, which is close to one side of the first air outlet, is the guide surface.

In one embodiment, the angle between the guide surface and the horizontal is 90 ° -160 °.

In one embodiment, the bottom wall of the first avoidance area is provided with an air passing port communicated with the cooking cavity, and the first fan blade is arranged above the air passing port.

In one embodiment, the number of the heating pipes is two, and at least part of the heating part of at least one heating pipe is positioned at the air passing opening.

In one embodiment, the first air outlet is annularly arranged on the peripheral side of the first fan blade.

In one embodiment, the top of the cooking cavity has a second opening, and the cavity upper plate is disposed at the second opening.

In one embodiment, the cooking appliance is one of an oven, an air fryer, a steam box, and a steam oven.

The cooking appliance comprises a box body, an air duct system, a cavity upper plate, a heating assembly and a fan assembly, wherein the box body is provided with a cooking cavity, the air duct system comprising a heat dissipation air duct and a hot air duct is arranged at the top of the box body, at least part of the heat dissipation air duct is arranged between the heat dissipation air duct at the top of the box body and the cooking cavity, namely, the hot air duct and at least part of the scattered hot air duct are arranged at the top of the box body to form an integrated air duct system, that is, the hot air duct and the at least part of the scattered hot air duct are arranged at the top of the box body, so that the structure of the cooking appliance is more compact, the volume of the cooking appliance is reduced (namely, the size of the cooking appliance along the front-back direction is reduced), the experience of a user is improved, meanwhile, parts are reduced, the cost is lowered, and the assembly efficiency is improved. Moreover, the air flow in the heat dissipation air duct flows to the outside through the second air outlet, so that heat transferred to the top of the box body in the cooking cavity can be dissipated, and heat dissipation and cooling of the box body, the main board and other parts located at the top of the box body are realized. In addition, through setting up the heating portion of heating pipe in the below of cavity upper plate to set up first air outlet on the cavity upper plate, heating portion sets up promptly in the culinary art intracavity directly, that is to say, the heating portion of heating pipe heats the heat that produces can directly transfer to the food in the culinary art intracavity, compare in the heating portion setting of heating pipe on the cavity upper plate through the heat radiation heat transfer, heat loss has been reduced, the heat utilization ratio has been improved, simultaneously, the cavity upper plate sets up in the top of heating portion, can also improve the problem that the heat transfer of culinary art intracavity reaches the box top to a certain extent, can reduce the heat of the spare parts such as mainboard that transmits to the box top and be located the box top, thereby effectively reduce the box top and be located the temperature of spare parts such as mainboard at the box top, cooking appliance's life has been improved.

In addition, through setting up the heating element including at least one heating pipe, the heating pipe sets up in the cavity upper plate, the heating portion of heating pipe is located the culinary art intracavity at least, and be located the below of cavity upper plate, be provided with first air outlet on the cavity upper plate, the culinary art chamber communicates through first air outlet with hot-blast wind channel, the heating portion of heating pipe is not located hot-blast wind channel promptly, under the effect of first fan blade, the air current in the hot-blast wind channel flows through the first air outlet flow direction heating portion of cavity upper plate, on the one hand, the heat that the direct flow direction heating portion of air current can carry heating portion better blows to food, improve heat utilization ratio and improve the culinary art effect, on the other hand, the air current that carries heat can blow perpendicularly to food, cooking efficiency and culinary art effect have been improved further.

Drawings

Fig. 1 is a schematic structural view of a cooking appliance with a door omitted according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an enlarged view at B in FIG. 2;

fig. 4 is a schematic structural view of a cooking appliance according to another embodiment of the present utility model, wherein a dotted arrow indicates a flow direction of an air flow;

FIG. 5 is an exploded view of a portion of the air duct system and fan assembly connection of the present utility model;

FIG. 6 is a schematic view of a top plate of a chamber according to an embodiment of the utility model;

FIG. 7 is a schematic view showing a connection structure between a chamber upper plate and a heating assembly according to an embodiment of the present utility model;

FIG. 8 is a cross-sectional view of FIG. 7;

FIG. 9 is an enlarged view at C in FIG. 8, wherein the dashed arrows indicate the direction of airflow;

fig. 10 is a schematic diagram of a connection structure between a mounting plate and a wind scooper according to an embodiment of the present utility model.

Description of the reference numerals

A case 10; a cooking chamber 10a; an inner container 11; a first opening 11a; a second opening 11b; a door body 12; a third air outlet 12a; a third air inlet 12b; a cavity front plate 13; an air duct system 20; a heat radiation air duct 21; a second air outlet 21a; a first sub-duct 21b; a second sub-duct 21c; a hot air duct 22; a fan assembly 30; a first fan blade 31; a second fan blade 32; a motor 33; a main body 331; a rotating shaft 332; a mounting bracket 34; a heating assembly 40; a heating pipe 41; a heating section 411; a connection end 412; a cavity upper plate 50; a first air outlet 50a; a first avoidance region 50b; a guide surface 50c; an air outlet 50d; a guide groove 50e; a cover plate 60; a second avoidance zone 60a; a mounting plate 70; a third avoidance zone 70a; a wind scooper 80; a fourth avoidance zone 80a; a second air inlet 80b; cooking appliance 100.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments of the present utility model and the technical features of the embodiments may be combined with each other, and the detailed description in the specific embodiments should be interpreted as an explanation of the gist of the present utility model and should not be construed as unduly limiting the present utility model.

In the description of the present utility model, the terms "top," bottom, "" upper, "" lower, "" front, "" rear, "and" positional relationships are based on the orientations or positional relationships shown in fig. 1 and 4, where the "height direction" is based on the top-bottom direction shown in fig. 1 and the "back" is based on the rear side shown in fig. 4, it should be understood that these positional terms are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. The utility model will be described in further detail with reference to the accompanying drawings and specific examples. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

An embodiment of the present utility model provides a cooking appliance, please refer to fig. 1 to 5, including a case 10, a cavity upper plate 50, an air duct system 20, a cavity upper plate 50, a heating assembly 40 and a fan assembly 30.

It should be noted that the specific type of the cooking appliance 100 is not limited herein, and in an exemplary embodiment, the cooking appliance 100 is one of an oven, an air fryer, a steam box, and a steam oven. The embodiment of the present utility model will be described by taking the cooking appliance 100 as an oven.

In other embodiments, the microwave heating function can be integrated on the cooking appliances 100 with different functions according to the user's needs, so as to separate the microwave from the oven, the steam box or the steam oven, and improve the kitchen use convenience. For example, a microwave oven all-in-one machine.

Referring to fig. 2 and 3, the cooking appliance 100 includes a heating assembly 40 having at least one heating tube 41, and at least a heating portion 411 of the heating tube 41 is positioned in the cooking cavity 10a, i.e., generates heat by heating the heating tube 41 for heating food in the cooking cavity 10a.

The heating assembly 40 has at least one heating tube 41, and in some embodiments, the heating assembly 40 includes 1 heating tube 41. In other embodiments, the heating assembly 40 includes a plurality of heating tubes 41. The number of heating pipes 41 is 2 in the embodiment of the present utility model.

Wherein, the plurality refers to a number of 2 or more than 2.

In an embodiment, the cooking appliance 100 includes an electric control box, which is used for being electrically connected with the connection end 412 of the heating tube 41, and the electric control box includes a main board, etc., so as to control the operation and disconnection of the heating tube 41.

The specific arrangement position of the electronic control box is not limited herein, and the electronic control box is illustratively arranged at the top of the case 10.

The main board of the electric control box is provided with components such as a CPU chip and a relay with high power consumption, and when in work, the components can generate large heat, so that the components such as the chip and the like have certain requirements on temperature rise in order to avoid performance reduction caused by overheating, and therefore the components need to be radiated.

For example, referring to fig. 2, 7 and 8, the heating tube 41 includes a heating portion 411 and a connection end 412, the heating portion 411 of the heating tube 41 is located in the cooking cavity 10a, and the connection end 412 of the heating tube 41 may be disposed outside the cooking cavity 10a so as to be electrically connected with the electronic control box. In addition, the heating part 411 of the heating pipe 41 is located in the cooking cavity 10a, so that heat transferred to the top of the box 10 is reduced, and further, the temperature of the electric control box can be reduced, and the service life of the box 10 and the user experience are improved.

It should be noted that "at least part of the heat dissipation air duct 21 is disposed at the top of the case 10" means that part of the heat dissipation air duct 21 may be disposed at the top of the case 10, or all of the heat dissipation air duct 21 may be disposed at the top of the case 10.

Referring to fig. 2 and 3, the hot air duct 22 is disposed between the cooking cavity 10a and the heat dissipation duct 21 at the top of the case 10, i.e. the hot air duct 22 is disposed above the cooking cavity 10a, and at least part of the heat dissipation duct 21 is disposed above the hot air duct 22, i.e. the hot air duct 22 and at least part of the heat dissipation duct 21 are integrally disposed at the top of the case 10 to form the integrated air duct system 20.

Referring to fig. 2 and 3, the fan assembly 30 includes a first fan blade 31 disposed in the hot air duct 22, and under the action of the first fan blade 31, air in the hot air duct 22 flows to the cooking cavity 10a through the first air outlet 50a, so that a temperature field inside the cooking cavity 10a is more uniform, and a cooking effect is improved.

Referring to fig. 2 to 5, the heat dissipation air duct 21 has a second air outlet 21a, the fan assembly 30 includes a second fan blade 32 disposed in the heat dissipation air duct 21, and under the action of the second fan blade 32, the air flow in the heat dissipation air duct 21 flows to the outside through the second air outlet 21a, so that the air flow rate can be increased under the action of the second fan blade 32, the scattered air flow is more concentrated and smooth, the heat at the top of the box 10 is smoothly introduced into the heat dissipation air duct 21, and flows to the outside through the second air outlet 21a, so that the purpose of reducing the temperature is achieved, the temperatures of the top of the box 10 and parts such as a main board located at the top of the box 10 are effectively reduced, the temperatures of the top of the box 10 and parts such as the main board located at the top of the box 10 are effectively reduced, and the service life of the cooking appliance 100 is prolonged.

Referring to fig. 2, 3 and 7, the upper cavity plate 50 is located at the top of the cooking cavity 10a, the upper cavity plate 50 is provided with a first air outlet 50a, the cooking cavity 10a is communicated with the hot air duct 22 through the first air outlet 50a, namely, the heating pipe 41 is disposed on the upper cavity plate 50, the heating part 411 is located in the cooking cavity 10a and is located below the upper cavity plate 50, that is, the heating part 411 of the heating pipe 41 is directly disposed in the cooking cavity 10a, the heat generated by heating the heating pipe 41 can be directly transferred to the food in the cooking cavity 10a, so that the cooking efficiency and the cooking effect can be improved, and meanwhile, the upper cavity plate 50 is disposed above the heating part 411, so that the problem that the heat in the cooking cavity 10a is transferred to the top of the box 10 can be improved to a certain extent.

In the related art, when the oven works, the heating pipe in the cooking cavity heats and generates heat, part of heat is used for heating food in the cooking cavity, part of heat can be transferred to the outside of the cooking cavity, such as the top of the oven body and parts such as an electric control box arranged at the top of the oven body, in addition, components such as a CPU chip and a relay with high power consumption are arranged on a main board of the electric control box, larger heat can be generated when the components on the main board run in the environment with the temperature specification critical value and above for a long time, the service life can be reduced, even the fire risk exists, and the personal safety of a crisis user is improved. In addition, the heating pipe sets up in the top of cavity upper plate, can cause heat loss to a certain extent, reduces the heat utilization ratio, simultaneously, the heat of heating pipe transmits to parts such as the top of box or the mainboard that is located the box top more easily to there is the box top and is located parts such as mainboard at box top and problem that the temperature is high.

The cooking appliance according to the embodiment of the utility model includes a case 10, an air duct system 20, a cavity upper plate 50, a heating assembly 40 and a fan assembly 30, wherein the case 10 has a cooking cavity 10a, by providing the air duct system 20 including a heat dissipation air duct 21 and a hot air duct 22, at least a part of the heat dissipation air duct 21 is disposed at the top of the case 10, and the hot air duct 22 is disposed between the heat dissipation air duct 21 at the top of the case 10 and the cooking cavity 10a, i.e., the hot air duct 22 and at least the heat dissipation air duct 21 are disposed at the top of the case 10 to form the integrated air duct system 20, that is, by disposing the hot air duct 22 and at least the heat dissipation air duct 21 at the top of the case 10, the structure of the cooking appliance 100 can be made more compact, the volume of the cooking appliance 100 (i.e., the size of the cooking appliance 100 in the front-rear direction can be reduced), thereby improving the user experience, and at the same time, reducing the cost and improving the assembly efficiency. Furthermore, the heat dissipation air duct 21 has a second air outlet 21a, and the air flow in the heat dissipation air duct 21 flows to the outside through the second air outlet 21a, so that the heat transferred to the top of the box 10 in the cooking cavity 10a can be dissipated, so as to realize heat dissipation and temperature reduction of the box 10 and the main board and other parts located at the top of the box 10. In addition, by arranging the heating portion 411 of the heating tube 41 below the cavity upper plate 50, that is, the heating portion 411 is directly arranged in the cooking cavity 10a, that is, the heat generated by heating the heating portion 411 of the heating tube 41 can be directly transferred to the food in the cooking cavity 10a, compared with the heating portion 411 of the heating tube 41 arranged above the cavity upper plate 50, the heat loss is reduced, the heat utilization rate is improved, and meanwhile, the cavity upper plate 50 is arranged above the heating portion 411, the problem that the heat in the cooking cavity 10a is transferred to the top of the box 10 can be improved to a certain extent, that is, the heat transferred to the top of the box 10 and the parts such as the main board positioned at the top of the box 10 can be reduced, so that the temperature of the top of the box 10 and the parts such as the main board positioned at the top of the box 10 can be effectively reduced, and the service life of the cooking appliance 100 is prolonged.

In the related art, the hot air duct is arranged at the back of the box body, the first fan blades and the heating pipes are arranged in the hot air duct, the air flow of the hot air duct is not directly blown to the heating pipes, and the air flow carrying heat of the hot air duct is parallel to the food, so that the cooking efficiency and the cooking effect are poor.

In the cooking appliance according to the embodiment of the present utility model, by providing the heating assembly 40 including at least one heating pipe 41, the heating pipe 41 is disposed on the cavity upper plate 50, at least the heating portion 411 of the heating pipe 41 is located in the cooking cavity 10a and below the cavity upper plate 50, the cavity upper plate 50 is provided with the first air outlet 50a, the cooking cavity 10a is communicated with the hot air duct 22 through the first air outlet 50a, that is, the heating portion 411 of the heating pipe 41 is not located in the hot air duct 22, under the action of the first fan blade 31, the air flow in the hot air duct 22 flows to the heating portion 411 through the first air outlet 50a of the cavity upper plate 50, and the air flow carries the heat of the heating portion 411 to blow to the food in the cooking cavity 10a.

As an example, referring to fig. 2 to 5, the cooking appliance 100 includes a cover plate 60 covering the cavity upper plate 50, the cover plate 60 and the cavity upper plate 50 enclose a hot air duct 22, at least a heating portion 411 of the heating tube 41 is located below the cavity upper plate 50, and at least the heating portion 411 of the heating tube 41 is located below the cavity upper plate 50, i.e. the hot air duct 22 is disposed above the cooking cavity 10a, because at least the heating portion 411 of the heating tube 41 is located in the cooking cavity 10a.

In an embodiment, referring to fig. 2, 3 and 6, a partial area of the cavity upper plate 50 is recessed downward and forms a first avoidance area 50b, and the first fan blade 31 is disposed in the first avoidance area 50b. On the one hand, the cavity upper plate 50 forms the first avoiding area 50b, namely provides an installation position for the first fan blade 31, in addition, the space of the hot air duct 22 can be increased, the air quantity is improved, the temperature field in the cooking cavity 10a is further more uniform, and the cooking effect is improved. On the other hand, the cavity upper plate 50 only needs to be partially recessed to form an avoidance area, and other areas can be made as small as possible, so that the structure can be more compact.

In an embodiment, referring to fig. 2 to 5, an area of the cover plate 60 corresponding to the first avoidance area 50b is recessed upward to form a second avoidance area 60a, and the first avoidance area 50b and the second avoidance area 60a enclose to form the hot air duct 22. That is, the first fan blade 31 is disposed between the first avoidance region 50b and the second avoidance region 60 a. So, on the one hand, cavity upper plate 50 forms first district 50b of dodging, and apron 60 forms second district 60a of dodging, can dodging first fan blade 31, provides the mounted position for first fan blade 31 promptly, in addition, can also increase the space in hot-blast wind channel 22, improves the amount of wind, further makes the temperature field in the culinary art chamber 10a more even, improves the culinary art effect. On the other hand, the cavity upper plate 50 and the cover plate 60 only need to be partially recessed to form an avoidance area, and other areas can be made as small as possible, so that the structure can be more compact.

Illustratively, the first fan blade 31 is a centrifugal fan blade, and the centrifugal fan blade is used for providing a wind source for the hot air duct 22, so that compared with the existing through-flow fan blade, the noise is smaller, the fan blade is not easy to fail, the service life is long, the user experience is improved, in addition, the air inlet quantity is large, the temperature field in the cooking cavity 10a is more uniform, and the cooking effect is improved.

For example, referring to fig. 2 to 9, at least a portion of the first air outlet 50a is formed on a sidewall of the first avoidance region 50b. The opening direction of the first air outlet 50a can play a role in guiding the airflow direction of the hot air duct 22, and when the first fan blade 31 rotates, the airflow of the hot air duct 22 is blown out through the first air outlet 50a on the side wall of the first avoidance area 50b. By forming at least part of the first air outlet 50a on the side wall of the first avoidance area 50b, the air flow of the hot air duct 22 flows to the cooking cavity 10a at a certain angle, and is blown to the heating part 411 of the heating pipe 41.

Note that, at least a part of the first air outlets 50a are formed on the side wall of the first avoidance area 50b means that a part of the first air outlets 50a may be formed on the side wall of the first avoidance area 50b, or all of the first air outlets 50a may be formed on the side wall of the first avoidance area 50b. When a part of the first air outlet 50a is formed on the sidewall of the first avoidance area 50b, another part of the first air outlet 50a may be formed on the bottom wall of the first avoidance area 50b, or another part of the first air outlet 50a may be formed in the non-recessed area of the cavity upper plate 50.

In the related art, the hot air duct is arranged at the back of the box body, the first fan blades and the heating pipes are arranged in the hot air duct, and the hot air cover and the cavity upper plate are required to be arranged to guide the air flow of the hot air duct, so that the quantity of parts is large, and the production assembly efficiency is influenced.

In the embodiment of the present utility model, referring to fig. 7 to 9, the cavity upper plate 50 includes a guiding surface 50c located at a side of the first air outlet 50a away from the first fan blade 31, that is, the guiding surface 50c is disposed at an outer side of the cavity upper plate 50 located at the first air outlet 50a, at least a portion of the air flow flowing out of the first air outlet 50a can be guided to the heating portion 411 through the guiding surface 50c, so that the air flow blown to the guiding surface 50c is guided to the heating portion 411 of the heating tube 41 under the action of the guiding surface 50c through the arrangement of the guiding surface 50c. That is, compared with the prior art that the air flow of the hot air duct 22 is guided by arranging the hot air cover, the utility model directly guides the air flow by arranging the guide surface 50c on the cavity upper plate 50, thereby reducing the number of parts, lowering the cost and improving the assembly efficiency.

In an embodiment, referring to fig. 7 to 9, the cavity upper plate 50 is located at a side of the first air outlet 50a away from the first fan blade 31 and is recessed downward to form a guiding groove 50e, and a side surface of the guiding groove 50e, which is close to the side of the first air outlet 50a, is a guiding surface 50c, i.e. after the air flow of the hot air duct 22 flows out through the first air outlet 50a, part of the air flow will flow to the guiding surface 50c of the guiding groove 50e, and under the guiding action of the guiding surface 50c, the air flow flows to the heating portion 411. The structure is simple and easy to form.

In other embodiments, the edge of the upper plate 50 of the cavity may be turned down to form a flange, and the side of the flange near the first air outlet 50a is a guiding surface 50c.

In one embodiment, referring to FIG. 9, the angle A between the guide surface 50c and the horizontal is 90-160. For example, 90 °, 95 °, 100 °, 105 °, 110 °, 115 °, 120 °, 125 °, 130 °, 135 °, 140 °, 145 °, 150 °, 155 °, 160 °, etc.

When the angle between the guide surface 50c and the horizontal surface is smaller than 90 °, the flow rate of the air flow may be reduced, which is disadvantageous to the flow of the air flow to the cooking chamber 10a, and thus to the uniformity of the temperature field in the cooking chamber 10a.

When the angle between the guide surface 50c and the horizontal plane is greater than 160 °, the guide effect of the guide surface 50c may be poor, and a portion of the air flow may flow away from the gap between the guide surface 50c and the heating portion 411, that is, the portion of the air flow may not blow toward the heating portion 411, thereby disadvantageously making the temperature field in the cooking cavity 10a uniform.

The included angle between the guiding surface 50c and the horizontal plane is 90 ° -160 °, so that the air flow entering the cooking cavity 10a flows to the heating portion 411 as much as possible while the air volume of the hot air duct 22 blowing to the cooking cavity 10a is not affected, which is beneficial to making the temperature field in the cooking cavity 10a more uniform.

Referring to fig. 8, L1 is the width of the first air outlet 50a, and the dimension of L1 is related to the air volume of the hot air duct 22 entering the cooking cavity 10a, wherein the larger L1 is, the larger the air volume of the hot air duct 22 entering the cooking cavity 10a is, and the smaller L1 is, the smaller the air volume of the hot air duct 22 entering the cooking cavity 10a is.

Referring to fig. 9, H1 is the depth of the first avoidance area 50b of the upper plate 50 of the cavity, and the avoidance space is used for installing the hot air fan blades. H2 is the depth of the guiding groove 50e of the upper cavity plate 50, the angle a between the guiding surface 50c of the guiding groove 50e and the horizontal plane is 140 °, L2 is the distance between two adjacent heating tubes, D is the radiation range of the air flow in the hot air duct 22 flowing out through the first air outlet 50a of the upper cavity plate 50, and the heating portion 411 needs to be within this range. But the values of H1, H2, A, L2 and D can be set to allow the air flow in the hot air duct 22 to flow to the heating part 411 through the first air outlet 50a as much as possible.

In an embodiment, referring to fig. 2 to 6, the bottom wall of the first avoidance area 50b is provided with an air passage 50d communicating with the cooking cavity 10a, and the first fan blade 31 is disposed above the air passage 50d, that is, the hot air duct 22 communicates with the cooking cavity 10a through the air passage 50d, and the air passage 50d is further beneficial to the airflow between the hot air duct 22 and the cooking cavity 10a.

The relative position of the first fan blade 31 and the air passage 50d is not limited on a plane perpendicular to the height direction of the cooking appliance 100, and illustratively, the central axis of the first fan blade 31 coincides with the central axis of the air passage 50d, thus further facilitating the flow of the air flow between the hot air passage 22 and the cooking cavity 10a.

In an embodiment, the first air outlet 50a is disposed around the periphery of the first fan blade 31. Thus, when the first fan blade 31 rotates, the air flows along the circumferential direction of the first fan blade 31 to the circumferential side of the first fan blade 31, and the first air outlet 50a is annularly arranged on the circumferential side of the first fan blade 31, so that the air in the hot air duct 22 flows to the cooking cavity 10a through the first air outlet 50 a.

Illustratively, in one embodiment, referring to fig. 2, the cooking cavity 10a has a second opening 11b at the top thereof, and the cavity upper plate 50 is disposed at the second opening 11 b. That is, the inner container 11, the door 12 and the upper cavity plate 50 together define the cooking cavity 10a, the heating portion 411 of the heating tube 41 is disposed in the cooking cavity 10a, and by disposing the hot air duct 22 above the upper cavity plate 50, heat of the heating portion 411 is reduced from being transferred to the top of the case 10 and other parts such as the electronic control box located at the top of the case 10.

In other embodiments, the cooking cavity 10a has a second opening 11b at the top thereof, and the cover plate 60 is disposed at the second opening 11 b. That is, the inner container 11, the door 12 and the cover 60 together define the cooking cavity 10a, the cavity upper plate 50 is disposed in the cooking cavity 10a, the heating portion 411 of the heating tube 41 is disposed below the cavity upper plate 50, and by disposing the hot air duct 22 above the cavity upper plate 50, heat transfer from the heating portion 411 to the top of the case 10 and other parts such as the electronic control box located at the top of the case 10 is reduced.

Referring to fig. 1 and 2, an exemplary case 10 includes a liner 11 and a door body 12, wherein the liner 11 is provided with a cooking cavity 10a having a first opening 11a at a front side, and the door body 12 is openably and closably provided at the first opening 11a, i.e., the door body 12 is provided for opening or closing the cooking cavity 10a, so that a user can cook conveniently.

Referring to fig. 2, the heat dissipation air duct 21 includes a first sub-air duct 21b disposed at the top of the case 10 and a second sub-air duct 21c disposed in the door 12, and the second sub-air duct 21c extends along the height direction of the door 12. That is, the cooking appliance 100 may radiate heat from the top of the case 10 and other parts such as the electronic control box located at the top of the case 10 through the first sub-air duct 21b, and simultaneously, may radiate heat from the door 12 through the second sub-air duct 21c by exhausting heat from the door 12, thereby achieving multiple heat radiation and cooling effects.

For example, referring to fig. 2 to 6, the cooking appliance 100 includes a mounting plate 70 disposed above the cover plate 60 and a wind guiding cover 80 disposed on the mounting plate 70, wherein the mounting plate 70 and the wind guiding cover 80 enclose a first sub-air duct 21b and a second air outlet 21a communicating with the first sub-air duct 21b. By arranging the mounting plate 70 above the cover plate 60, the air guide cover 80 is covered on the mounting plate 70, and the mounting plate 70 and the air guide cover 80 enclose to form the first sub-air duct 21b, that is, the first sub-air duct 21b is arranged above the hot air duct 22.

It should be noted that the specific forming manner of the second air outlet 21a is not limited herein, and in some embodiments, the mounting plate 70 and the air guiding cover 80 may define the second air outlet 21a together. In other embodiments, the mounting plate 70 may further have a second air outlet 21a, that is, the second air outlet 21a is disposed on the mounting plate 70. In still other embodiments, the second air outlet 21a may be disposed on the air guiding cover 80.

Of course, referring to fig. 2, the case 10 may further include a cavity front plate 13, a fourth air outlet corresponding to the second air outlet 21a is disposed on the cavity front plate 13, and the mounting plate 70 and the air guiding cover 80 may be connected to the cavity front plate 13. The air flow in the first sub-air duct 21b flows out through the second air outlet 21a and flows out to the outside through the fourth air outlet.

In an embodiment, referring to fig. 2 to 6, a partial area of the mounting plate 70 is recessed downward to form a third avoidance area 70a, an area of the air guiding cover 80 corresponding to the third avoidance area 70a is recessed upward to form a fourth avoidance area 80a, and the third avoidance area 70a and the fourth avoidance area 80a enclose to form a first sub-air duct 21b. That is, the second fan blade 32 is disposed between the third avoidance region 70a and the fourth avoidance region 80 a. Thus, on the one hand, the mounting plate 70 forms the third avoidance area 70a, and the air guide cover 80 forms the fourth avoidance area 80a, so that the second fan blade 32 can be avoided, that is, the mounting position is provided for the second fan blade 32, in addition, the space of the first sub-air duct 21b can be increased, the air quantity is improved, and the heat dissipation effect on the top of the box body 10 and other parts such as the electric control box positioned on the top of the box body 10 is further improved. On the other hand, as long as the mounting plate 70 and the air guide cover 80 are partially recessed to form the avoidance area, other areas can be made as small as possible, and the structure can be further compact.

In other embodiments, a portion of the mounting plate 70 may be recessed downward and form the third avoidance area 70a, the fourth avoidance area 80a is not formed by the air guiding cover 80, and the second fan blade 32 is disposed in the third avoidance area 70 a.

In still other embodiments, the mounting plate 70 may not form the third avoidance area 70a, a partial area of the wind scooper 80 is recessed upward and forms the fourth avoidance area 80a, and the second fan blade 32 is disposed in the fourth avoidance area 80 a.

For example, referring to fig. 2 to 6, the second fan blade 32 is a centrifugal fan blade, and the centrifugal fan blade is used to provide a wind source for the heat dissipation air duct 21, so that compared with the existing through-flow fan blade, the noise is smaller, the through-flow fan blade is not easy to fail, the service life is long, the user experience is improved, in addition, the air inlet quantity is also large, and the heat dissipation effect is improved.

In an embodiment, referring to fig. 4, 5 and 10, the top of the air guiding cover 80 is provided with the second air inlet 80b, so, when the fan assembly 30 works, external air flow can enter the first sub-air duct 21b through the second air inlet 80b at the top of the air guiding cover 80, so that negative pressure is generated in the top area of the cooking appliance 100, and the external air flow of the cooking appliance 100 is driven to flow into the cooking appliance 100, and is sucked into the first sub-air duct 21b, and the air flow is discharged through the second air outlet 21a under the action of the second fan blade 32, so that heat dissipation of the top of the box 10 and other parts such as an electric control box at the top of the box 10 is realized.

For example, referring to fig. 2, the direction of the second air outlet 21a is perpendicular to the direction of the second air inlet 80 b. Of course, the direction of the second air outlet 21a and the direction of the second air inlet 80b may be disposed at a certain angle.

The second air outlet 21a faces the door body 12, and a third air outlet 12a communicated with the second sub-air duct 21c is arranged at a position, close to the second air outlet 21a, of the door body 12. At this time, because the air flow in the first sub-air duct 21b flows to the outside through the second air outlet 21a, negative pressure is formed at the second air outlet 21a, and the door body 12 is provided with a third air outlet 12a close to the second air outlet 21a and communicated with the second sub-air duct 21c, so that negative pressure is also formed at the third air outlet 12a, the air flow in the second sub-air duct 21c inside the door body 12 flows into the outside from the third air outlet 12a under the action of the negative pressure, and the heat in the door body 12 can be dissipated through the second sub-air duct 21c, so that the multiple heat dissipation and cooling effects are achieved.

The bottom of the door body 12 is provided with a third air inlet 12b communicated with the second sub-air duct 21 c. When negative pressure is formed at the third air outlet 12a, external air flow can flow into the second sub-air duct 21c inside the door body 12 from the third air inlet 12b, and under the action of negative pressure, air flow of the second sub-air duct 21c inside the door body 12 flows into the outside from the third air outlet 12a.

In an embodiment, referring to fig. 2 to 5, the fan assembly 30 includes a motor 33 located at the second air inlet 80b, the motor 33 includes a main body 331 and a rotating shaft 332 connected to the main body 331, the rotating shaft 332 sequentially penetrates through the heat dissipation air duct 21 and the hot air duct 22, the first fan blade 31 and the second fan blade 32 are disposed on the rotating shaft 332, and the motor 33 is in driving connection with the first fan blade 31 and the second fan blade 32. That is, the motor 33 is in driving connection with the first fan blade 31 and the second fan blade 32, that is, the first fan blade 31 and the second fan blade 32 are driven simultaneously by one motor 33, so that parts and cost are reduced, the structure is more compact, the assembly efficiency is improved, and an electric control program is easy to realize.

When the fan assembly 30 works, the motor 33 rotates through the rotating shaft 332 to drive the second fan blade 32 to rotate, so that a negative pressure area is formed in the top area of the cooking appliance 100, airflow is driven to enter the heat dissipation air duct 21, the airflow is led out from the second air outlet 21a through the rotation of the second fan blade 32, meanwhile, negative pressure is also formed by the airflow of the second sub-air duct 21c inside the door body 12 under the action of the negative pressure, the airflow of the second sub-air duct 21c inside the door body 12 flows into the outside from the third air outlet 12a, heat inside the door body 12 can be dissipated through the second sub-air duct 21c, and the effects of multiple heat dissipation and cooling are achieved. In addition, the rotating shaft 332 drives the first fan blade 31 to rotate at the same time, so that the air flow in the hot air duct 22 blows to the heating portion 411 of the heating pipe 41, which improves the heat cycle efficiency in the cooking cavity 10a, makes the temperature field in the cooking cavity 10a more uniform, and improves the cooking effect.

The motor 33 is disposed at the second air inlet 80b, when the fan assembly 30 works, external air flows into the heat dissipation air duct 21 through the second air inlet 80b, and is guided out from the second air outlet 21a through the rotation of the second fan blade 32, that is, external cold air flows into the heat dissipation air duct 21 through the motor 33, so that the heat dissipation and cooling effects on the motor 33 can be achieved.

In one embodiment, referring to fig. 2 to 5, the fan assembly 30 includes a mounting bracket 34 disposed at the second air inlet 80b, the mounting bracket 34 is connected to the air guiding cover 80, and the motor 33 is disposed on the mounting bracket 34. The fan assembly 30 is integrally fixed on the wind scooper 80 through the mounting bracket 34, so that the fan assembly is easy to assemble and disassemble, and the maintenance and production efficiency are improved.

In addition, the fan assembly 30 may be prefabricated components, that is, the motor 33, the first fan blade 31, the second fan blade 32, and the like of the fan assembly 30 may be assembled first, and when the cooking appliance 100 is assembled, the fan assembly 30 assembled in advance may be directly assembled in place, so that the assembly efficiency is improved.

It should be noted that, the mounting bracket 34 is provided with a hollow portion, and when the mounting bracket 34 is disposed at the second air inlet 80b, the external air flow can enter the heat dissipation air duct 21 from the hollow portion.

The various embodiments/implementations provided by the utility model may be combined with one another without contradiction.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model are included in the protection scope of the present utility model.

Claims (11)

1. A cooking appliance, comprising:

the box body is provided with a cooking cavity;

the air duct system comprises a heat dissipation air duct and a hot air duct, at least part of the heat dissipation air duct is arranged at the top of the box body, the hot air duct is arranged between the cooking cavity and the heat dissipation air duct positioned at the top of the box body, and the heat dissipation air duct is provided with a second air outlet;

the cavity upper plate is positioned at the top of the cooking cavity, a first air outlet is formed in the cavity upper plate, and the cooking cavity is communicated with the hot air duct through the first air outlet;

the heating assembly comprises at least one heating pipe, the heating pipe is arranged on the cavity upper plate, and at least the heating part of the heating pipe is positioned in the cooking cavity and below the cavity upper plate;

the fan assembly comprises a first fan blade arranged in the hot air duct and a second fan blade arranged in the heat dissipation duct, air in the hot air duct flows through the first air outlet to the heating part under the action of the first fan blade, and air in the heat dissipation duct flows through the second air outlet to the outside under the action of the second fan blade.

2. The cooking appliance of claim 1, wherein a partial region of the cavity upper plate is recessed downward and forms a first avoidance region, and the first fan blade is disposed in the first avoidance region.

3. The cooking appliance of claim 2, wherein at least a portion of the first air outlet is formed on a sidewall of the first avoidance zone.

4. The cooking appliance of claim 1, wherein the cavity upper plate comprises a guide surface positioned on a side of the first air outlet away from the first fan blade, and at least a portion of the air flow flowing out of the first air outlet can be guided to the heating portion through the guide surface.

5. The cooking appliance of claim 4, wherein the cavity upper plate is located at a side of the first air outlet away from the first fan blade and is recessed downwards to form a guide groove, and a side surface of the guide groove, which is close to the first air outlet, is the guide surface.

6. The cooking appliance of claim 4, wherein the angle between the guide surface and the horizontal is 90 ° -160 °.

7. The cooking appliance of claim 2, wherein the bottom wall of the first avoidance zone is provided with an air port in communication with the cooking cavity, and the first fan blade is disposed above the air port.

8. The cooking appliance of claim 7, wherein the number of heating tubes is two, at least a portion of at least one heating tube being located at the air vent.

9. The cooking appliance of claim 1, wherein the first air outlet is annularly arranged on the peripheral side of the first fan blade.

10. The cooking appliance according to any one of claims 1 to 9, wherein the top of the cooking cavity has a second opening, and the cavity upper plate is disposed at the second opening.

11. The cooking appliance of any one of claims 1-9, wherein the cooking appliance is one of an oven, an air fryer, a steam box, and a steam oven.