CN105873260A - Embedded cooking device - Google Patents

Abstract

The invention provides a built-in cooking utensil comprising: a box body, a microwave generating device, an electrical device, and a vortex fan; the vortex fan drives air to flow in a cooling air duct in the box body; An air duct, an electrical appliance air duct, a microwave air duct and a circulating air duct; the electrical device is located in the electrical air duct; the microwave generating device is located in the electrical air duct; the circulating air duct is arranged at the rear side of the cabinet and passes through the cooking cavity. The embedded cooking utensil provided by the present invention uses a vortex fan to drive air to flow in the cooling air passage in the box body, so that the cooling air passage can have a relatively large wind pressure, so that the cooling air passage can have a relatively large air flow, and the cooling air The air duct is divided into three air ducts to cool the electrical components and improve the cooking effect of the food in the cooking cavity. In addition, the vortex fan has the advantages of low noise, low energy consumption, stable performance, and convenient maintenance, which improves the comfort of the product. , thereby increasing the market competitiveness of the product.

Description

built-in cooking appliances

technical field

The invention relates to the technical field of kitchens, in particular to a built-in cooking appliance.

Background technique

At present, in the existing drawer-type microwave ovens, the air intake at the cold air inlet is not sufficient, so that the cold air cannot be well used for cooling, which easily leads to a decrease in the service life of the microwave generator. In addition, due to defects in the cold air circuit design of the existing drawer-type microwave ovens, the cooling fan can only cool a single high-heating component or a few high-heating components, which cannot meet the overall cooling air circulation requirements of the entire drawer-type microwave oven.

Contents of the invention

In order to solve at least one of the above-mentioned technical problems, the object of the present invention is to provide a built-in cooking appliance, comprising: a box body, a cooking cavity is arranged on the box body, and a An air outlet, the lower part of the front plate is provided with an air inlet; a microwave generating device, the microwave generator is arranged in the box; an electrical device, the electrical device is arranged in the box; and a vortex fan, the vortex The fan is arranged in the box and is used to drive air to flow in the cooling air channel in the box; the cooling air channel includes: an air inlet channel, and the air inlet channel is arranged on the right side of the box body , and communicated with the air inlet; the air outlet air duct, the air outlet air duct is set on the top of the box, and communicates with the air outlet; the electrical air duct, the electrical air duct is set on the The rear side of the box body extends to the left side of the box body, and communicates with the air inlet air duct and the air outlet air duct respectively, and the electrical device is located in the electrical appliance air duct; the microwave air duct, the The microwave air duct is arranged on the rear side of the box body, and communicates with the air inlet duct and the air outlet duct respectively, the microwave generating device is located in the microwave air duct; and the circulating air duct, the The circulation air duct is arranged on the rear side of the box body and passes through the cooking cavity and out of the cooking cavity to communicate with the air outlet duct, and the circulation air duct is also communicated with the air intake duct .

The embedded cooking utensil provided by the present invention uses a vortex fan to drive air to flow in the cooling air passage in the box body, so that the cooling air passage can have a larger wind pressure and a larger air flow in the cooling air passage. On the one hand, , can fully cool the electrical components in the microwave air duct and electrical air duct, on the other hand, can improve the cooking effect of the food in the cooking cavity through the circulating air duct, in addition, the vortex fan also has low noise, low energy consumption, stable performance, The advantages of convenient maintenance and so on, thereby improving the use comfort of the product, and then increasing the market competitiveness of the product.

Specifically, the air intake at the cold air inlet of the built-in cooking appliance is not sufficient, so that the cold air cannot be well used to cool down, so as to protect the microwave generator. This will easily lead to the decline of the service life of the microwave generator, and the embedded cooking appliance provided by the present invention uses a vortex fan to drive air to flow in the cooling air duct in the box body, which can make the cooling air duct have a larger wind pressure and make the cooling The air duct can have a relatively large flow of air, and at the same time, the cooling air duct is divided into three air ducts to cool the electrical components and improve the cooking effect of the food in the cooking cavity. Specifically, the electrical air duct cools the electrical components, and the microwave wind The air duct is connected to the microwave generating device, and the circulating air duct improves the cooking effect of the food in the cooking chamber. In addition, the vortex fan also has the advantages of low noise, low energy consumption, stable performance, and convenient maintenance, which improves the comfort of the product and increases market competitiveness of products.

In addition, the cooking utensils in the above embodiments provided by the present invention may also have the following additional technical features:

In the above technical solution, the vortex fan includes a motor, fan blades and a casing, and the casing has two outlets for driving the air in the air inlet channel to flow to the electrical appliance air channel, the microwave air channel and In the circulating air duct, one of the outlets communicates with the microwave air duct and the circulating air duct, and the other outlet communicates with the electrical appliance air duct.

In this technical solution, the vortex fan has two outlets, so that the wind blown from the vortex fan is directly divided into two paths, so that the different air volumes of the two outlets can be set according to the air volume required in different air ducts, avoiding the three-wind The unreasonable distribution of air volume in the tunnel leads to poor cooling effect of electrical components or affects the cooking effect of food in the cooking cavity, which improves the comfort of the product and thus increases the market competitiveness of the product.

In any one of the above technical solutions, the microwave generating device includes a magnetron and a wind guide, the magnetron is arranged in the wind guide, the wind guide surrounds the air guide channel, and the The air guide channel is a part of the circulating air channel and the microwave air channel.

In this technical solution, the setting of the air guide cover can guide the cooling air, so that the cooling air can fully cool the magnetron, thereby improving the cooling efficiency of the magnetron and prolonging the life of the magnetron. service life, thereby prolonging the service life of cooking utensils, increasing the market competitiveness of products.

In any one of the above technical solutions, a ventilation hole is provided on the top plate of the cooking cavity, and the air guiding channel passes through the ventilation hole and the air outlet channel.

In this technical solution, the setting of the air hole increases the residence time of the cooling air in the microwave air duct, so that the cooling air can further fully cool the magnetron, thereby further improving the cooling efficiency of the magnetron and prolonging the magnetron. The service life of the tube, thereby prolonging the service life of the cooking utensils, increases the market competitiveness of the product.

In any one of the above technical solutions, air holes are provided on the rear panel of the cooking cavity, and a lower air guide shell is provided on the right panel of the cavity, and the lower air guide shell encloses a first channel, and the The first channel communicates with the cooking cavity and the air outlet channel respectively, the air guide channel communicates with the cooking cavity through the air hole, the air guide channel, the cooking cavity and the first channel Constitute the circulating air duct.

In this technical solution, the circulating air enters the cooking cavity through the air guide channel, and the circulating air enters the cooking cavity and circulates in the cooking cavity, so that the heat in the cooking cavity is evenly distributed in the cooking cavity, and then carries the water in the cooking cavity The steam enters the air outlet duct from the first channel, so that the cooking effect of the food in the cooking chamber can be improved through the circulating air duct, thereby improving the comfort of the product and increasing the market competitiveness of the product.

In any one of the above technical solutions, the built-in cooking appliance further includes: an upper air guide shell, the upper air guide shell is arranged in the air outlet channel, and divides the air outlet air channel into the second channel and the third channel. The upper air guiding shell encloses the third channel, the second channel communicates with the microwave air channel and the electrical appliance air channel, and the third channel communicates with the circulating air channel.

In this technical solution, the hot air blown from the cooking cavity flows in the sealed upper air guiding shell, which eliminates the leakage of high-temperature water vapor in the air outlet duct, thereby avoiding the damage of water vapor and electrical components, and prolonging the The service life of the product is extended, and the market competitiveness of the product is increased. At the same time, it can also prevent water vapor from entering the door of the cooking appliance, forming fog on the door and window, thereby increasing the comfort of the product.

In any one of the above technical solutions, the built-in cooking appliance further includes: a vertical partition plate, the vertical partition plate is arranged in the box, and is used to separate the air inlet duct from the electrical appliance air duct. channel, the microwave air channel and the circulating air channel are separated, and the vortex fan is arranged on the vertical partition plate.

In this technical solution, the setting of vertical partition boards is increased, which can further increase the wind pressure in the microwave air duct, circulating air duct and electrical appliance air duct. The electrical component cooling, on the other hand, can improve the cooking effect of the food in the cooking cavity by circulating the air in the duct.

In any one of the above technical solutions, a side air channel is provided on the left side of the box, a rear air channel is provided on the rear side of the box, and the side air channel and the rear air channel constitute the electric appliance. air duct.

In this technical solution, due to the different degrees of heat generation of the electrical components, the electrical components with higher heat generation can be placed in the rear air duct, and the electrical components with lower heat generation can be placed in the side air duct, so that the cooling wind can fully cool the electrical components. Cool down.

In any one of the above technical solutions, the built-in cooking appliance further includes: an air duct partition, the air duct partition is connected to the rear panel of the cooking cavity, and is used to connect the side air duct to the rear air duct. The air passages are separated, and conduct holes are arranged on the air passage partitions.

In this technical solution, the setting of the air duct partition increases the residence time of the cooling air in the rear air duct, so that the cooling air can further cool the electrical components in the rear air duct, thereby further improving the cooling efficiency of the electrical components and prolonging the cooling time. The service life of electrical components is extended, thereby prolonging the service life of cooking utensils and increasing the market competitiveness of products.

In any one of the above technical solutions, the air duct partition and the rear panel are of an integrated structure.

In this technical solution, the air duct partition and the rear plate are of an integrated structure. On the one hand, the connection strength between the air duct partition and the rear plate is increased, thereby reducing the occurrence of fractures between the air duct partition and the rear plate. probability, which increases the market competitiveness of the product. On the other hand, the air duct partition and the rear plate can be made in one piece, thereby improving the production efficiency of the product, thereby reducing the manufacturing cost of the product and increasing the market for the product. Competitiveness.

Additional aspects and advantages of the invention will become apparent in the description which follows, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a three-dimensional schematic diagram of the built-in cooking utensil of the present invention;

Fig. 2 is a partial structural schematic diagram of the first viewing angle of the built-in cooking appliance of the present invention;

Fig. 3 is a partial structural schematic diagram of a second viewing angle of the built-in cooking appliance of the present invention;

Fig. 4 is a schematic cross-sectional structural view of the built-in cooking appliance of the present invention.

Wherein, the corresponding relationship between reference numerals and component names in Fig. 1 to Fig. 4 is:

10 Cabinet, 11 Cooking cavity, 111 Vent hole, 12 Back panel, 121 Air hole, 13 Air inlet, 14 Air outlet, 20 Microwave generator, 21 Magnetron, 22 Air guide cover, 23 Air guide channel, 30 Electrical components , 40 vortex fan, 41 motor, 42 fan blade, 43 shell, 51 air inlet duct, 52 air outlet duct, 53 electrical duct, 531 side air duct, 532 rear air duct, 54 microwave air duct, 55 circulating air Road, 60 lower air guide shells, 61 first passages, 70 upper air guide shells, 80 vertical partitions, 90 air duct partitions, and 91 conduction holes.

detailed description

In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

The built-in cooking appliance according to some embodiments of the present invention will be described below with reference to FIGS. 1 to 4 .

As shown in FIGS. 1 to 4 , the built-in cooking appliance provided by the present invention includes: a box body 10 , a microwave generating device 20 , an electrical device 30 and a vortex fan 40 .

Specifically, the box body 10 is provided with a cooking cavity 11, and the top of the front plate of the box body 10 is provided with an air outlet 14, and the bottom of the front plate is provided with an air inlet 13; the microwave generator is arranged in the box body 10; the electrical device 30 It is arranged in the box body 10; the vortex fan 40 is arranged in the box body 10, and is used to drive air to flow in the cooling air channel in the box body 10; the cooling air channel includes: the air inlet air channel 51, the air outlet air channel 52, electrical appliances Air duct 53, microwave air duct 54 and circulation air duct 55. The air inlet duct 51 is arranged on the right side of the box body 10 and communicates with the air inlet 13; the air outlet duct 52 is arranged on the top of the box body 10 and communicates with the air outlet 14; and extend to the left side of the box body 10, and communicate with the air inlet duct 51 and the air outlet duct 52 respectively, the electrical device 30 is located in the electrical appliance air duct 53; side, and communicate with the air inlet duct 51 and the air outlet duct 52 respectively, the microwave generating device 20 is located in the electrical appliance air duct 53; The cooking chamber 11 communicates with the outlet air channel 52 , and the circulation air channel 55 also communicates with the air inlet channel 51 .

The embedded cooking appliance provided by the present invention adopts the vortex fan 40 to drive the air to flow in the cooling air passage in the box body 10, so that the cooling air passage can have a larger wind pressure and a larger air flow in the cooling air passage. At the same time, the cooling air duct is divided into three air ducts to cool the electrical components respectively to improve the cooking effect of the food in the cooking chamber 11. Specifically, the electrical air duct 53 cools the electrical device 30, and the microwave air duct 54 cools the microwave generating device 20. , the circulating air duct 55 improves the cooking effect of the food in the cooking cavity 11. In addition, the vortex fan 40 also has the advantages of low noise, low energy consumption, stable performance, and convenient maintenance, thereby improving the comfort of the product and increasing the product quality. market competitiveness.

In one embodiment of the present invention, as shown in FIGS. 2 and 3 , a vortex fan 40 includes a motor 41 , fan blades 42 and a housing 43 .

Specifically, the casing 43 has two outlets, which are used to drive the air in the air inlet duct 51 to flow to the electrical appliance duct 53, the microwave duct 54 and the circulation duct 55, and one outlet communicates with the microwave duct 54 and the circulation duct 55. , and the other outlet communicates with the electrical appliance air duct 53.

In this embodiment, the vortex fan 40 has two outlets, so that the wind blown from the vortex fan 40 is directly divided into two paths, so that the different air volumes of the two outlets can be set according to the air volumes required in different air ducts, and the three outlets are avoided. Unreasonable distribution of air volume in each air duct leads to poor cooling effect on electrical components or affects the cooking effect of food in the cooking chamber 11, which improves the comfort of the product and increases the market competitiveness of the product.

In one embodiment of the present invention, as shown in FIGS. 2 to 3 , the microwave generating device 20 includes a magnetron 21 and a wind guide 22 .

Specifically, the magnetron 21 is arranged in the wind guide hood 22 , and the wind guide cover 22 encloses the air guide channel 23 , and the air guide channel 23 is a part of the circulating air channel 55 and the microwave air channel 54 .

In this embodiment, the setting of the wind guide cover 22 can guide the cooling wind, so that the cooling wind can fully cool the magnetron 21, thereby improving the cooling efficiency of the magnetron 21 and prolonging the magnetron. The service life of the control 21 is controlled, thereby prolonging the service life of the cooking utensil and increasing the market competitiveness of the product.

In one embodiment of the present invention, as shown in FIG. 2 and FIG. 3 , a vent hole 111 is provided on the top plate of the cooking chamber 11 , and the air guide channel 23 passes through the vent hole 111 and the air outlet duct 52 .

In this embodiment, the setting of the air hole 111 increases the residence time of the cooling wind in the microwave air channel 54, so that the cooling wind can further fully cool the magnetron 21, thereby further improving the cooling efficiency of the magnetron 21 , prolonging the service life of the magnetron 21, thereby prolonging the service life of the cooking utensil and increasing the market competitiveness of the product.

In one embodiment of the present invention, as shown in Fig. 2 and Fig. 3, air hole 121 is arranged on the rear plate 12 of cooking cavity 11, and lower air guide shell 60 is arranged on the right plate of cavity, and lower air guide shell 60 Surrounded by a first passage 61, the first passage 61 communicates with the cooking chamber 11 and the air outlet duct 52 respectively, the air guide passage 23 communicates with the cooking chamber 11 through the air hole 121, the air guide passage 23, the cooking chamber 11 and the first passage 61 A circulating air duct 55 is formed.

In this embodiment, the circulating air enters the cooking cavity 11 through the air guiding channel 23, and the circulating air enters the cooking cavity 11 and circulates in the cooking cavity 11, so that the heat in the cooking cavity 11 is evenly distributed in the cooking cavity 11, and then brought As the water vapor in the cooking cavity 11 enters the air outlet duct 52 from the first channel 61, the cooking effect of the food in the cooking cavity 11 can be improved through the circulating air duct 55, thereby improving the comfort of the product and increasing the market competitiveness of products.

In an embodiment of the present invention, as shown in FIG. 2 and FIG. 3 , the built-in cooking appliance further includes: an upper air guide shell 70 .

Specifically, the upper air guide shell 70 is arranged in the air outlet duct 52, and the air outlet air duct 52 is divided into a second channel and a third channel, and the upper air guide shell 70 encloses the third channel, and the second channel and the microwave air duct 54 communicates with the electrical air duct 53, and the third passage communicates with the circulating air duct 55.

In this embodiment, the hot air blown from the cooking cavity 11 flows in the sealed upper air guide shell 70, which eliminates the leakage of high-temperature water vapor in the air outlet duct 52, thereby avoiding the leakage of the water vapor electrical device 30. damage, thereby prolonging the service life of the product and increasing the market competitiveness of the product. At the same time, it can also prevent water vapor from entering the door of the cooking appliance and form fog on the door and window, thereby increasing the comfort of the product.

In an embodiment of the present invention, as shown in FIGS. 2 to 4 , the built-in cooking appliance further includes: a vertical partition plate 80 .

Specifically, the vertical partition plate 80 is arranged in the box body 10 for separating the air inlet duct 51 from the appliance air duct 53, the microwave air duct 54 and the circulation air duct 55, and the vortex fan 40 is arranged in the vertical Straight divider 80.

In this embodiment, the setting of the vertical partition plate 80 is increased, which can further increase the wind pressure in the microwave air duct 54, the circulating air duct 55 and the electrical air duct 53. On the one hand, it can fully control the microwave air duct. 54 and the electrical components in the electrical air duct 53 are cooled, on the other hand, the cooking effect of the food in the cooking chamber 11 can be improved through the circulating air duct 55 .

In one embodiment of the present invention, as shown in FIG. 3 , a side air channel 531 is provided on the left side of the box body 10, and a rear air channel 532 is provided on the rear side of the box body 10. The side air channel 531 and the rear air channel 532 An electrical air duct 53 is formed.

In this embodiment, due to the different degrees of heat generation of the electrical components 30, the electrical components 30 with higher heat generation can be arranged in the rear air passage 532, and the electrical devices 30 with lower heat generation can be arranged in the side air passage 531, so that cooling The wind sufficiently cools the electrical device 30 .

In one embodiment of the present invention, as shown in FIG. 2 and FIG. 3 , the built-in cooking appliance further includes: an air duct partition 90 .

Specifically, the air passage partition 90 is connected to the rear panel 12 of the cooking cavity 11 for separating the side air passage 531 from the rear air passage 532 , and the air passage partition 90 is provided with a conduction hole 91 .

In this embodiment, the setting of the air channel partition 90 increases the residence time of the cooling air in the rear air channel 532, so that the cooling air can further cool the electrical components 30 in the rear air channel 532, thereby further improving the performance of the electrical appliances. The cooling efficiency of the component 30 prolongs the service life of the electrical component 30, thereby prolonging the service life of the cooking utensil and increasing the market competitiveness of the product.

In an embodiment of the present invention, as shown in FIG. 2 and FIG. 3 , the air duct partition 90 and the rear panel 12 are integrally structured.

In this embodiment, the air duct partition 90 and the rear panel 12 are of an integrated structure. On the one hand, the connection strength between the air duct partition 90 and the rear panel 12 is increased, thereby reducing the connection between the air duct partition 90 and the rear panel 12. The probability of fracture between the plates 12 increases the market competitiveness of the product. On the other hand, the air duct partition 90 and the rear plate 12 can be made integrally, thereby improving the production efficiency of the product and reducing the production cost of the product. Manufacturing costs increase the market competitiveness of products.

The air flow in the cooling air duct of the drawer microwave oven according to some embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

3 to 4, the vortex fan 40 sucks the air A from the air inlet 13, and the air A enters the air inlet duct 51, and after passing through the vortex fan 40, the two outlets of the vortex fan 40 are divided into the first A part of air a and a second part of air bc, the first part of air a passes through the rear air channel 532 and the side air channel 531 and then enters the second channel, the first part of air a cools the electrical device 30, and the second part of air bc enters the wind guide cover 22, the second part of the air bc is divided into the first sub-air b and the second sub-air c, the first sub-air b enters the second passage from the vent hole 111, and the first sub-air b cools the magnetron 21, The second sub-air c enters the cooking cavity 11 from the air hole 121 , and then enters the second channel from the first channel 61 , and the second sub-air c circulates the air in the cooking cavity 11 .

To sum up, the built-in cooking appliance provided by the present invention uses a vortex fan to drive air to flow in the cooling air passage in the box body, so that the cooling air passage can have a greater wind pressure, and the cooling air passage can have a larger air pressure. On the one hand, it can fully cool the electrical components in the microwave air duct and the electrical air duct; on the other hand, it can improve the cooking effect of the food in the cooking cavity through the circulating air duct; Low cost, stable performance, convenient maintenance and other advantages, thus improving the comfort of the product, and thus increasing the market competitiveness of the product.

Specifically, the air intake at the cold air inlet of the built-in cooking appliance is not sufficient, so that the cold air cannot be well used to cool down, so as to protect the microwave generator. This will easily lead to the decline of the service life of the microwave generator, and the embedded cooking appliance provided by the present invention uses a vortex fan to drive air to flow in the cooling air duct in the box body, which can make the cooling air duct have a larger wind pressure and make the cooling The air duct can have a relatively large flow of air, and at the same time, the cooling air duct is divided into three air ducts to cool the electrical components and improve the cooking effect of the food in the cooking cavity. Specifically, the electrical air duct cools the electrical components, and the microwave wind The air duct is connected to the microwave generating device, and the circulating air duct improves the cooking effect of the food in the cooking chamber. In addition, the vortex fan also has the advantages of low noise, low energy consumption, stable performance, and convenient maintenance, which improves the comfort of the product and increases The market competitiveness of the product

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. The terms "installation", "connection", "connection", "fixed" and other terms should be interpreted in a broad sense, for example, "connection" can be fixed connection, detachable connection, or integral connection; "connection" can be directly or indirectly through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right" etc. is based on the orientation or positional relationship shown in the drawings, and is only for convenience The present invention is described and simplified descriptions do not indicate or imply that the referred device or unit must have a specific orientation, be constructed and operate in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of this specification, descriptions of the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in the present invention In at least one embodiment or example of . In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A built-in cooking utensil, characterized in that, comprising: A box body, the box body is provided with a cooking cavity, and the upper part of the front plate of the box body is provided with an air outlet, and the lower part of the front plate is provided with an air inlet; A microwave generating device, the microwave generator is arranged in the box; an electrical device, the electrical device being disposed within the box; and A vortex fan, the vortex fan is arranged in the box, and is used to drive air to flow in the cooling air passage in the box; The cooling air passage includes: an air inlet air passage, which is arranged on the right side of the box and communicates with the air inlet; an air outlet channel, the air outlet channel is arranged on the top of the box and communicates with the air outlet; Electric appliance air duct, the electrical air duct is arranged on the rear side of the box and extends to the left side of the box, and communicates with the air inlet air duct and the air outlet air duct respectively, the electrical appliance The components are located in the air duct of the electrical appliance; a microwave air duct, the microwave air duct is arranged on the rear side of the box body, and communicates with the air inlet air duct and the air outlet air duct respectively, and the microwave generating device is located in the microwave air duct; and A circulating air channel, the circulating air channel is arranged on the rear side of the box and passes through the cooking cavity and passes out of the cooking cavity to communicate with the outlet air channel, the circulating air channel is also connected to the The air intake duct is connected. 2. The built-in cooking appliance according to claim 1, characterized in that, The vortex fan includes a motor, fan blades and a housing, and the housing has two outlets for driving the air in the air intake channel to flow to the electrical appliance air channel, the microwave air channel and the circulation air channel, One of the outlets is in communication with the microwave air duct and the circulating air duct, and the other outlet is in communication with the electrical appliance air duct. 3. The built-in cooking appliance according to claim 1, characterized in that, The microwave generating device includes a magnetron and a wind guide, the magnetron is arranged in the wind guide, the wind guide surrounds an air guide channel, and the air guide channel is the circulating air channel Part of and the microwave duct. 4. The built-in cooking appliance according to claim 3, characterized in that, Ventilation holes are arranged on the top plate of the cooking cavity, and the air guiding channel passes through the ventilation holes and the air outlet duct. 5. The built-in cooking appliance according to claim 3, characterized in that, Air holes are arranged on the rear plate of the cooking cavity, and a lower air guiding shell is set on the right plate of the cavity, and the lower air guiding shell encloses a first channel, and the first channel is connected with the cooking cavity respectively. It communicates with the air outlet channel, the air guide channel communicates with the cooking cavity through the air hole, and the air guide channel, the cooking cavity and the first channel constitute the circulating air channel. 6. The built-in cooking appliance according to any one of claims 1 to 5, characterized in that, It also includes: an upper air guiding shell, the upper air guiding shell is arranged in the air outlet duct, and divides the air outlet air duct into a second channel and a third channel, and the upper air guiding shell encloses the first air channel. Three channels, the second channel communicates with the microwave air channel and the electrical appliance air channel, and the third channel communicates with the circulating air channel. 7. The built-in cooking appliance according to any one of claims 1 to 5, characterized in that, It also includes: a vertical partition board, the vertical partition board is arranged in the box, and is used to separate the air inlet duct from the electrical appliance duct, the microwave duct and the circulation duct. separated, and the vortex fan is arranged on the vertical partition plate. 8. The built-in cooking appliance according to any one of claims 1 to 5, characterized in that, The left side of the box body is provided with a side air duct, and the rear side of the box body is provided with a rear air duct, and the side air duct and the rear air duct constitute the electrical appliance air duct. 9. The built-in cooking appliance according to claim 8, further comprising: An air passage partition, the air passage partition is connected to the rear panel of the cooking cavity, and is used to separate the side air passage from the rear air passage, and the air passage partition is provided with a conductive hole. 10. The built-in cooking appliance according to claim 9, characterized in that, The air duct partition and the rear panel are of an integral structure.