CN113932258A

CN113932258A - Built-in cooking appliance

Info

Publication number: CN113932258A
Application number: CN202010604965.7A
Authority: CN
Inventors: 任孟珂; 唐相伟; 周宇; 林健; 张璧; 任志文; 裴杰
Original assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2022-01-14

Abstract

The invention discloses an embedded cooking appliance.A cooking opening, an air inlet and an air outlet are formed on the front side of a shell; the inner bag sets up in the casing and just to the culinary art mouth setting, prescribes a limit to the heat dissipation wind channel between casing and the inner bag. The electric device is at least partially arranged in the heat dissipation air duct, and the door body is arranged on the front side of the shell. The centrifugal fan is arranged in the heat dissipation air duct and is arranged close to the back of the shell. The heat dissipation air channel comprises a top air channel positioned above the inner container, the top air channel comprises a top air inlet channel and a top air outlet channel which are separated from each other, the top air inlet channel is communicated with the air inlet, the top air outlet channel is communicated with the air outlet, and the air inlet and the air outlet ends of the centrifugal fan are respectively communicated with the top air inlet channel and the top air outlet channel. According to the built-in cooking appliance disclosed by the invention, the dependence on a cabinet ventilation air channel is omitted, and the application range of the built-in cooking appliance is expanded. The position of the centrifugal fan is arranged, so that the utilization rate of airflow power generated by the centrifugal fan is improved.

Description

Built-in cooking appliance

Technical Field

The invention belongs to the technical field of household appliances, and particularly relates to an embedded cooking appliance.

Background

The embedded cooking utensil of the related art prevents that high temperature from producing danger for the inside temperature of control utensil, simultaneously in order to prevent that the utensil of taking the microwave function from leaking the microwave, the utensil generally induced drafts around the utensil through the fan at top, then from the air outlet exhaust heat. The built-in cooking appliance requires that the cabinet to be installed has a ventilation duct for heat dissipation to meet the normal working requirement, but many household cabinets do not have a heat dissipation duct which does not meet the installation condition of the built-in cooking appliance. In addition, the existing user research shows that the embedded cooking appliance is used under the condition that a cabinet heat dissipation air channel is not available, and the embedded cooking appliance is insufficient in heat dissipation in the operation process, so that the performance of the whole machine is influenced, and a fire disaster can be caused.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an embedded cooking appliance, which does not need to increase a heat dissipation air duct of a cabinet, meets the self heat dissipation requirement of the appliance and reduces the requirement on the external environment.

The built-in cooking appliance according to an embodiment of the present invention includes: the cooking device comprises a machine shell, a cooking port, an air inlet and an air outlet, wherein the front side of the machine shell is provided with the cooking port, the air inlet and the air outlet; the inner container is arranged in the shell and is opposite to the cooking opening, and a heat dissipation air channel is defined between the shell and the inner container; an electrical device mounted at least partially within the cooling air duct; the door body is arranged on the front side of the machine shell to open and close the cooking opening; the centrifugal fan is arranged in the heat dissipation air duct and is arranged close to the back of the shell; the heat dissipation air channel comprises a top air channel located above the inner container, the top air channel comprises a top air inlet channel and a top air outlet channel which are separated from each other, the top air inlet channel is communicated with the air inlet, the top air outlet channel is communicated with the air outlet, the air inlet end of the centrifugal fan is communicated with the top air inlet channel, and the air outlet end of the centrifugal fan is communicated with the top air outlet channel.

According to the embedded cooking appliance provided by the embodiment of the invention, the top air inlet channel and the top air outlet channel are arranged above the inner container, and air flow can enter from the front side of the shell and then exit from the front side of the shell by utilizing the driving of the centrifugal fan, so that the dependence on a ventilation air channel of a cabinet is omitted, an electric device positioned at the top can be fully radiated, the safety performance of the whole machine can be improved, and the application range of the embedded cooking appliance is favorably expanded. Because the top airflow has an angle of nearly 180 degrees to be adjusted from the air inlet to the air outlet, the design difficulty of angle adjustment can be reduced by driving the airflow to flow through the centrifugal fan. The centrifugal fan is arranged near the back of the shell, so that the top air inlet channel and the top air outlet channel are longer, the number of electric devices capable of flowing through is increased, the power of the centrifugal fan is distributed on the inlet side and the outlet side in a balanced manner, and the utilization rate of airflow power generated by the centrifugal fan is improved.

In some embodiments, the number of the top air inlet ducts is two, the two top air inlet ducts are located on two horizontal sides of the top air outlet duct, the axes of the centrifugal fans are arranged along the horizontal direction, the air inlet ends corresponding to the two top air inlet ducts are arranged at two axial ends of the centrifugal fans, and the air outlet end is arranged on one side of the centrifugal fans, which faces the door body, in the circumferential direction.

Specifically, the centrifugal fan includes: the two centrifugal volutes are arranged along the horizontal direction, one ends, far away from each other, of the two centrifugal volutes are respectively communicated with the two top air inlet ducts, and the two centrifugal volutes are communicated with the top air outlet duct on one side, facing the door body, of the two centrifugal volutes in the circumferential direction; the two centrifugal wind wheels are respectively arranged in the two centrifugal volutes; and the cooling motor is arranged between the two centrifugal volutes and is respectively connected with the two centrifugal wind wheels.

Furthermore, the number of the top air outlets is two, the two top air outlets are respectively communicated with the two centrifugal volutes, and the two top air outlets are combined to be communicated with one end of the door body.

In some embodiments, the two centrifugal volutes are respectively and fixedly connected to the inner container, and each centrifugal volute is provided with a fastener matched with the casing.

In some embodiments, the heat dissipation air duct includes a back air duct located at the back of the inner container, the casing is provided with a lower air opening communicated with the back air duct, and one ends of the two centrifugal volutes facing each other are respectively communicated with the back air duct.

Further, the downdraft openings are arranged at the bottom of the machine shell in rows.

In some embodiments, a portion of the electrical device is located on a back portion of the inner container, and the back air duct has an air suction opening facing the electrical device on the back portion.

In some embodiments, the door body is provided with at least one front air opening, and the front air opening is arranged corresponding to at least one of the air inlet and the air outlet.

In some embodiments, the electrical device comprises a transformer and a magnetron disposed within the top air duct.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a partial structure view of a built-in cooking appliance according to an embodiment of the present invention;

fig. 2 is a side view schematically illustrating a built-in cooking appliance according to an embodiment of the present invention;

fig. 3 is a schematic view of a wind direction in a top view of the built-in cooking appliance according to the embodiment of the present invention;

fig. 4 is a schematic diagram of a wind direction in a rear view direction of the built-in cooking appliance according to the embodiment of the present invention.

Reference numerals:

1. an embedded cooking appliance;

10. a housing; 11. a cooking port; 12. an air inlet; 13. an air outlet;

20. an inner container;

30. an electrical device; 31. a transformer; 32. a magnetron; 33. a back electronic board; 34. a temperature controller;

40. a door body; 41. a front tuyere;

50. a heat dissipation air duct; 51. a top air duct; 510. a top air inlet duct; 511. a top air outlet channel; 52. a back air duct; 520. an air suction opening; 53. a hollow heat insulation layer; 54. a baffle; 55. an upper duct pipe; 56. a rear duct pipe;

60. a centrifugal fan; 61. an air inlet end; 62. an air outlet end; 63. a centrifugal volute; 630. a fastener; 64. a centrifugal wind wheel; 65. the motor is cooled.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial.

In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The built-in cooking appliance 1 of the embodiment of the present invention is described below with reference to the accompanying drawings.

As shown in fig. 1 to 4, a built-in cooking appliance 1 according to an embodiment of the present invention includes: the refrigerator comprises a shell 10, an inner container 20, an electric device 30, a door body 40, a centrifugal fan 60 and a heat dissipation air duct 50.

As shown in fig. 1, the cabinet 10 is formed at a front side with a cooking opening 11, an intake opening 12, and an outlet opening 13. The inner container 20 is disposed in the casing 10 and opposite to the cooking opening 11, and a heat dissipation air duct 50 is defined between the casing 10 and the inner container 20. The casing 10 can provide protection for internal devices, and forms the appearance of the appliance, and the inner container 20 is used for placing articles to be heated.

The electrical device 30 is at least partially mounted within the cooling air duct 50 to address the problem of cooling of the electrical device 30. The door 40 is installed at the front side of the cabinet 10 to open and close the cooking port 11, and the centrifugal fan 60 is disposed in the heat dissipation duct 50, and the centrifugal fan 60 is disposed adjacent to the back of the cabinet 10.

The heat dissipation air duct 50 includes a top air duct 51 located above the inner container 20, the top air duct 51 includes a top air inlet duct 510 and a top air outlet duct 511 which are spaced apart from each other, the top air inlet duct 510 is communicated with the air inlet 12, the top air outlet duct 511 is communicated with the air outlet 13, the air inlet end 61 of the centrifugal fan 60 is communicated with the top air inlet duct 510, and the air outlet end 62 of the centrifugal fan 60 is communicated with the top air outlet duct 511.

In the embodiment of the present invention, the air inlet 12 is disposed at the top, external air enters the top air inlet duct 510 from the air inlet 12, and is then sucked into the centrifugal fan 60 from the air inlet end 61, the centrifugal fan 60 blows out air flow from the air outlet end 62, and the air flow blows out from the air outlet 13 after flowing through the top air outlet duct 511. When the airflow flows through the electric device 30, the heat at the electric device 30 can be taken away for heat dissipation, so that the problem that the electric device 30 is easy to damage due to overheating is solved.

It can be understood that, in order to meet the temperature rise requirement of the whole components, the heat dissipation scheme of the existing embedded cooking appliance is that the airflow is completely absorbed from the back or the bottom for heat dissipation, and some of the airflow can blow out the airflow after heat absorption from the back. This requires the embedded product to be installed, which must ensure that the installed cabinet has a ventilation duct with a certain width. The arrangement of the ventilation air duct on the cabinet increases the installation and use cost, which limits the use of the embedded cooking appliance to a certain extent.

In the scheme of the application, when the embedded cooking appliance 1 is installed, a ventilation air duct does not need to be arranged on the back of the cabinet, so that the installation cost is reduced. By designing the path of the self heat dissipation air duct 50, the requirements of overall heat dissipation and local heat dissipation can be met. As shown in fig. 3, a top air inlet duct 510 and a top air outlet duct 511 are disposed above the inner container 20, so that air flow for dissipating heat of the electric device 30 mainly enters and exits from the top, and the air inlet 12 and the air outlet 13 are both located at the front side of the casing 10. The airflow can dissipate heat from the electrical devices 30 in the top air inlet duct 510 and the top air outlet duct 511, so that the embedded cooking appliance 1 can perform heat dissipation circulation through its own air duct without air intake and heat dissipation through the cabinet external air duct. Therefore, the performance of the whole machine can be ensured, and potential safety hazards are reduced. Thus being beneficial to expanding the application range of the appliance and leading the appliance to be used in both embedded environment and non-embedded environment.

It should be noted that, the back pressure and the flow rate of the fan have a corresponding relationship, the resistance needs to be overcome when the fan sucks air, and when the resistance is larger, the efficiency of the fan is lower, and the flow rate is smaller. The contrast is original from the heat dissipation design that induced drafts in back, and the route of induced drafting of this application design is shorter, and the resistance when induced drafting is littleer, and the amount of wind just has certain promotion.

Here, the centrifugal fan 60 is used to drive the flow of the heat dissipating air flow because the centrifugal fan 60 has features of small size, light weight, low noise and high efficiency, and is a fan suitable for a high resistance system. In such a narrow space above the inner container 20, the difference between the air flow in and out directions is approximately 180 degrees, and the centrifugal fan 60 can conveniently adjust the air flow direction.

In the solution of the present application, the centrifugal fan 60 is disposed adjacent to the back of the casing 10, so that the distances from the air inlet 12 to the centrifugal fan 60 and from the centrifugal fan 60 to the air outlet 13 are both far, so that the top air inlet duct 510 and the top air outlet duct 511 are both long, the airflow path is long, and the number of the electric devices 30 capable of flowing heat can be increased. And the lengths of the inlet and outlet sides are not different, and the air resistance of the airflow flowing through the top air inlet duct 510 and the airflow flowing out of the top air outlet duct 511 are not different, so that the power of the centrifugal fan 60 is distributed more evenly on the inlet and outlet sides, and the utilization rate of the airflow power generated by the centrifugal fan 60 is improved.

As shown in fig. 3, in some embodiments, there are two top air inlet ducts 510, and the two top air inlet ducts 510 are located on both horizontal sides of the top air outlet duct 511. Compared with the design of a single outlet air duct in the prior art, the arrangement of the two top air inlet ducts 510 can greatly reduce the backpressure of the fan and increase the air quantity of the fan to a certain extent, thereby realizing better heat dissipation effect. It should be noted that, the back pressure and the flow rate of the fan have a corresponding relationship, the resistance needs to be overcome when the fan sucks air, and when the resistance is larger, the efficiency of the fan is lower, and the flow rate is smaller. The design of two top air inlet ducts 510 can make the path wider when induced draft, and the resistance of induced draft reduces, therefore the amount of wind can promote.

And the two top air inlet ducts 510 are located at two horizontal sides of the top air outlet duct 511, and correspondingly, the air inlets 12 are also located at the left and right sides of the air outlet 13 at the front side of the casing 10. The air inlets 12 on both sides are adjacent to the left and right sides of the casing 10, and help to suck more fresh cold air for heat dissipation.

Specifically, as shown in fig. 2 and 3, the axes of the centrifugal fan 60 are arranged along the horizontal direction, the two axial ends of the centrifugal fan 60 are provided with air inlet ends 61 corresponding to the two top air inlet ducts 510, and the centrifugal fan 60 is provided with an air outlet end 62 facing one side of the door 40 in the circumferential direction. Thus, the position arrangement of the centrifugal fan 60 can be adapted to the position relationship between the two top air inlet ducts 510 and the top air outlet duct 511, and the air duct structure is simplified.

It is understood that, in order to increase the air intake, the heat dissipation effect is improved, including but not limited to, the air inlet 12, the air outlet 13, the top air inlet duct 510, and the top air outlet duct 511 are all provided in plurality.

In some embodiments, the centrifugal fan 60 includes: the centrifugal fan comprises a centrifugal volute 63, a centrifugal wind wheel 64 and a cooling motor 65, wherein the two axial ends of the centrifugal volute 63 are provided with air inlet ends 61, and an air outlet end 62 is arranged between the two air inlet ends 61 on the peripheral wall of the centrifugal volute 63. The centrifugal wind wheel 64 is located within the centrifugal volute 63 and the cooling motor 65 may be either within the centrifugal volute 63 or outside the centrifugal volute 63. This structure is low in cost.

In other embodiments, as shown in FIG. 1, the centrifugal fan 60 includes: two centrifugal volutes 63, two centrifugal wind wheels 64 and a cooling motor 65. The two centrifugal volutes 63 are arranged along the horizontal direction, one ends of the two centrifugal volutes 63 far away from each other are respectively communicated with the two top air inlet ducts 510, and the two centrifugal volutes 63 are communicated with the top air outlet duct 511 towards one side of the door body 40 in the circumferential direction. The two centrifugal wind wheels 64 are respectively arranged in the two centrifugal volutes 63, and the cooling motor 65 is arranged between the two centrifugal volutes 63 and is respectively connected with the two centrifugal wind wheels 64. With this arrangement, the two centrifugal wind wheels 64 are used for respectively sucking air from the two top air inlet ducts 510, and it is ensured that sufficient suction force is generated to the two top air inlet ducts 510. And after the centrifugal wind wheel 64 is arranged corresponding to each top air inlet duct 510, the position of the wind wheel can be adjusted according to the position of the air duct, so that the wind wheel can play a better role. Connecting the cooling motor 65 to the two centrifugal wind wheels 64 can reduce the cost.

Of course, in other embodiments, a cooling motor 65 may be separately provided for each centrifugal wind wheel 64, so that each top air inlet duct 510 corresponds to a centrifugal fan 60.

Further, as shown in fig. 2, there are two top air outlets 511, the two top air outlets 511 are respectively communicated with the two centrifugal volutes 63, and the two top air outlets 511 are combined at one end adjacent to the door 40 to be communicated with the air outlet 13. Two top air outlet channels 511 are arranged corresponding to the two centrifugal volutes 63, so that each top air outlet channel 511 can be set into a better streamline shape according to the distribution characteristics of the air outlet flow, and the air outlet resistance of the centrifugal fan 60 is reduced. In the near front side, the two top air outlets 511 are merged and converged, so that more space can be provided for the top air inlet duct 510, and the air suction resistance can be reduced. Therefore, the technical effects of increasing the air intake and improving the heat dissipation capacity are achieved.

In some embodiments, as shown in fig. 1 and fig. 2, the centrifugal volutes 63 are respectively and fixedly connected to the inner container 20, and each centrifugal volute 63 is provided with a locking member 630 which is matched with the casing 10. The centrifugal volute 63 is fixedly connected to the inner container 20, so that the connection firmness and the running stability of the centrifugal fan 60 can be ensured. The arrangement of the fastener 630 is equivalent to the detachable connection relationship between the centrifugal volute 63 and the casing 10, which does not affect the dismounting of the casing 10, and can increase the connection strength between the centrifugal fan 60 and other parts.

It should be noted that, the built-in cooking appliance 1 may be disassembled a part of the housing 10 during maintenance, for example, the top cover in the housing 10 may be disassembled, and the latch 630 may be connected to the top cover, so that the top cover may be directly disassembled without disassembling the centrifugal fan 60 when maintenance is required.

As shown in fig. 4, in some embodiments, the heat dissipation air duct 50 includes a back air duct 52 located at the back of the inner container 20, a lower air opening (not shown) communicating with the back air duct 52 is provided on the casing 10, and two centrifugal volutes 63 respectively communicate with the back air duct 52 at ends facing each other. The air suction effect of the middle part of the centrifugal fan 60 is utilized to suck air to the back air duct 52, and the negative pressure effect is utilized to suck cold air from the lower air inlet to dissipate heat of the back of the inner container 20, so that the heat dissipation protection capability of the whole machine is further improved. And in conjunction with the top air duct 51, the reliance on cabinet ventilation ducts is more thoroughly eliminated.

Optionally, the bottom of the casing 10 is provided with a plurality of foot pads, and the foot pads space the bearing surface from the bottom surface of the casing 10, so that a gap is left between the casing 10 and the bearing surface.

As shown in fig. 1, in particular, the lower air inlets are arranged in a row at the bottom of the casing 10, so that the air suction resistance of the back air suction can be reduced, and the air suction amount can be increased.

As shown in fig. 4, in some embodiments, a portion of the electrical device 30 is located on the back of the inner container 20, and the back air duct 52 has an air suction opening 520 facing the electrical device 30 on the back. The air suction opening 520 is provided between the back air duct 52 and the electric devices 30, and connects the negative pressure region of the back air duct 52 caused by the cooling motor 65 to a designated local high temperature region such as the region where the electric devices 30 are located for directional heat dissipation.

Specifically, the back air duct 52 connects the negative pressure region to a designated local high temperature region through the guide plates 54 disposed at both sides of the air suction opening 520. Optionally, the electric device 30 comprises: the back electronic board 33 and the temperature controller 34, the back electronic board 33 and the temperature controller 34 are both arranged on the back of the inner container 20, and the guide plate 54 can guide the negative pressure of the back air duct 52 to the back electronic board 33 and the temperature controller 34 respectively.

Optionally, a hollow heat insulation layer 53 is formed between the bottom of the inner container 20 and the bottom of the casing 10, and a down-wind opening is formed on the casing 10 to communicate the hollow heat insulation layer 53 with the external space. Because the embedded cooking utensil 1 can be embedded into a wall body and a cabinet, the lower air opening is arranged to absorb cold air through the gap below the installation allowance so as to supplement the air intake. Here, the cooling air is sucked from the outside to radiate heat directionally to the high temperature area of the back part.

As shown in fig. 1, in some embodiments, at least one front air opening 41 is disposed on the door 40, and the front air opening 41 is disposed corresponding to at least one of the air inlet 12 and the air outlet 13. It can be understood that the door 40 needs to be disposed at the front side of the casing 10, and the space except the door 40 is small, and the space for disposing the air inlet 12 and the air outlet 13 is limited. At this time, a certain air port is arranged opposite to the door body 40, and a front air port 41 is arranged on the door body 40, so that the sum of the areas of all the air ports is increased, and the air resistance and the air inlet amount are reduced.

For the embedded cooking utensil 1 that utilizes microwave to heat, in order to prevent that the microwave of the front door body from revealing, the design that sets up the heat dissipation wind channel in the inside of the front door body has been removed in the heat dissipation design of this product. Thus, the door body is designed integrally, the air inlet 12 can only be positioned at the periphery of the door body 40, and in some schemes, the air inlets 12 can be arranged at the periphery of the door body 40, so that the centrifugal fan 60 can suck air from the periphery of the door body of the cooking utensil.

For the cooking appliance without the risk of microwave leakage, the door 40 can be designed with a front air inlet 41 corresponding to the air inlet 12 or the air outlet 13, so that the appliance can select a more proper position for air inlet or air outlet. For example, the air outlet 13 can be far away from the control area or the display area of the appliance, so as to avoid the direct blowing of hot air to the user.

In some embodiments, as shown in fig. 3, the electric device 30 includes a transformer 31 and a magnetron 32 disposed in the top air duct 51, and the transformer 31 and the magnetron 32 are fixed to the inner container 20. Thus, the stability of the transformer 31 and the magnetron 32 is ensured while the top strong wind is used for fully dissipating heat.

Specifically, the built-in cooking appliance 1 is one of various built-in high-temperature cooking appliances such as a microwave oven, a steam box, and an oven.

In some embodiments, as shown in fig. 1 and 2, the built-in cooking appliance 1 includes an upper duct pipe 55 and a rear duct pipe 56 connected to the inner container 20, the upper duct pipe 55 being disposed at the top of the inner container 20, and the rear duct pipe 56 being disposed at the rear side of the inner container 20.

The upper duct pipe 55 is substantially Y-shaped, and the upper duct pipe 55 is formed with two branches at the rear end to connect the air outlet ends 62 of the two centrifugal volutes 63, respectively, and the upper duct pipe 55 is merged and communicated at the front end. Two top air outlets 511 are defined between the upper duct pipe 55 and the inner container 20, and two top air inlets 510 are defined between two sides of the upper duct pipe 55 and the inner container 20 and the casing 10.

The rear air duct 56 extends vertically, a top nozzle of the rear air duct 56 faces the cooling motor 65, and a back air duct 52 is defined in the rear air duct 56. The area between the two branches at the rear end of the upper duct 55 is also connected to a cooling motor 65. Thus, the ends of the centrifugal wind wheels 64 facing each other can not only draw air from the rear duct tube 56, but also from the area between the two branches at the rear end of the upper duct tube 55. Thus, only two centrifugal wind wheels 64 are used, wind can be sucked from the front side and the rear side, the airflow flowing area is large, and the heat dissipation capacity is high.

A specific embodiment of the built-in cooking appliance 1 of the present invention is described below with reference to fig. 1 to 4.

An embedded cooking appliance 1 comprises a machine shell 10, an inner container 20, an electric device 30, a door body 40, an upper air duct pipe 55, a rear air duct pipe 56 and a centrifugal fan 60.

As shown in fig. 1 and 2, the casing 10 is provided with a cooking opening 11, an air inlet 12, an air outlet 13, and a lower air opening. The cooking port 11 is arranged at the front part of the machine shell 10, the door body 40 is arranged in front of the cooking port 11, and the door body 40 can rotatably seal the cooking port 11. As shown in fig. 3, the air inlet 12 is located at the upper portion of the housing 10, and one air inlet is provided at each of the left and right ends of the housing 10, and the air inlets 12 at each of the left and right ends face the front of the built-in cooking appliance 1. As shown in fig. 2 and 3, the air outlet 13 is also located at the upper portion of the housing 10 toward the front of the built-in cooking appliance 1, and the air outlet 13 is located between the left and right air inlets 12, as with the air inlets 12. The lower air inlet is located at the lower part of the casing 10 and is a row of holes.

The inner container 20 is wrapped by the casing 10 inside the casing 10, the inner container 20 is a cavity structure, and the middle is a cavity for bearing the articles to be cooked. As shown in fig. 2-4, the electrical devices 30 include a transformer 31, a magnetron 32, a back electronic board 33, a thermostat 34, and the like. The transformer 31 and the magnetron 32 are fixed on the top of the inner container 20, and the back electronic board 33 and the temperature controller 34 are positioned on the back of the inner container 20.

The upper duct tube 55 is located at the top of the liner 20 and the rear duct tube 56 is located at the back of the liner 20.

Other constitutions and operations of the built-in cooking appliance 1 according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A built-in cooking appliance, comprising:

the cooking device comprises a machine shell, a cooking port, an air inlet and an air outlet, wherein the front side of the machine shell is provided with the cooking port, the air inlet and the air outlet;

the inner container is arranged in the shell and is opposite to the cooking opening, and a heat dissipation air channel is defined between the shell and the inner container;

an electrical device mounted at least partially within the cooling air duct;

the door body is arranged on the front side of the machine shell to open and close the cooking opening; and the combination of (a) and (b),

the centrifugal fan is arranged in the heat dissipation air duct and is arranged close to the back of the shell; wherein the content of the first and second substances,

the heat dissipation air channel comprises a top air channel located above the inner container, the top air channel comprises a top air inlet channel and a top air outlet channel which are spaced, the top air inlet channel is communicated with the air inlet, the top air outlet channel is communicated with the air outlet, the air inlet end of the centrifugal fan is communicated with the top air inlet channel, and the air outlet end of the centrifugal fan is communicated with the top air outlet channel.

2. The embedded cooking utensil of claim 1, wherein the number of the top air inlet ducts is two, the two top air inlet ducts are located on two horizontal sides of the top air outlet duct, the axes of the centrifugal fans are arranged along the horizontal direction, the two axial ends of each centrifugal fan are provided with the air inlet ends corresponding to the two top air inlet ducts, and the air outlet ends are arranged on one side of each centrifugal fan facing the door body in the circumferential direction.

3. The built-in cooking appliance according to claim 2, wherein the centrifugal fan comprises:

the two centrifugal volutes are arranged along the horizontal direction, one ends, far away from each other, of the two centrifugal volutes are respectively communicated with the two top air inlet ducts, and the two centrifugal volutes are communicated with the top air outlet duct on one side, facing the door body, of the two centrifugal volutes in the circumferential direction;

the two centrifugal wind wheels are respectively arranged in the two centrifugal volutes;

and the cooling motor is arranged between the two centrifugal volutes and is respectively connected with the two centrifugal wind wheels.

4. The embedded cooking appliance according to claim 3, wherein the number of the top air outlets is two, the two top air outlets are respectively communicated with the two centrifugal volutes, and the two top air outlets are combined at one end close to the door body to be communicated with the air outlet.

5. The built-in cooking appliance according to claim 3, wherein the two centrifugal volutes are respectively and fixedly connected to the inner container, and each centrifugal volute is provided with a fastener matched with the casing.

6. The embedded cooking utensil of claim 3 wherein the heat dissipation duct includes a back duct located at the back of the inner container, the casing is provided with a lower air opening communicated with the back duct, and the two centrifugal volutes are respectively communicated with the back duct at ends facing each other.

7. The built-in cooking appliance according to claim 6, wherein the downdraft opening is arranged in a row at the bottom of the cabinet.

8. The built-in cooking appliance according to claim 6, wherein a portion of the electric device is located at a back portion of the inner container, and the back air duct has an air suction opening provided toward the electric device at the back portion.

9. The built-in cooking appliance according to claim 1, wherein the door body is provided with at least one front air opening, and the front air opening is arranged corresponding to at least one of the air inlet and the air outlet.

10. The built-in cooking appliance according to any one of claims 1 to 8, wherein the electric device includes a transformer and a magnetron provided in the top duct.