Air duct system and stove steaming and baking integrated machine

Abstract

The utility model discloses a kind of air duct system and stove steaming and baking integrated machine, air duct system is set on the stove of stove steaming and baking integrated machine bottom plate;Air duct system includes fan assembly, heat dissipation channel and air blowing channel, fan assembly includes shell and the fan being set in shell, shell includes first air inlet and second air inlet, the airflow entering from first air inlet enters heat dissipation channel via fan rotation, the airflow entering from second air inlet enters air blowing channel via fan rotation;Stove bottom plate has third air inlet, third air inlet is communicated with second air inlet, to make external airflow enter from third air inlet, and flow to second air inlet.Using the present scheme, it can effectively avoid the pollution of heat, particle etc. emitted by electronic components during the entering process of external airflow, improve the cleanliness of airflow used for air blowing and moisture removal. It is also beneficial to improve the uniformity of temperature field in the cavity of steaming and baking liner, and can also heat the steaming and baking liner to a certain extent.

Description

Technical Field

[0001] This utility model relates to an air duct system and a stove-steam-bake integrated machine. Background Technology

[0002] The air duct system of a combination cooktop, steam oven, and grill includes a heat dissipation channel and a blower channel. The heat dissipation channel dissipates heat from the electronic components, while the blower channel ventilates and dehumidifies the cavity of the steam oven. In existing technology, a dual-channel system for heat dissipation and air pressure boosting is installed at the centrifugal fan outlet of the blower cooling system in the cooktop chassis. This ensures the heat dissipation needs of the electronic components while achieving good dehumidification performance and temperature stability within the steam oven cavity, thus reducing energy waste, while also lowering costs.

[0003] Specifically, a layered, dual-channel structure is constructed at the fan outlet of the original blower cooling module. The upper channel handles the heat dissipation of the electronic components in the cooktop chassis, while the lower channel is used for the blower ventilation and dehumidification of the inner cavity of the steam oven. When the fan is working, airflow enters the cooktop chassis through openings, first cooling the critical components such as electronic components, before entering the centrifugal fan inlet for both heat dissipation and dehumidification. However, this airflow may absorb dust, particles, and other impurities as it flows through the electronic components, significantly reducing its cleanliness. Given that the inner cavity is the core area for food cooking, the cleanliness of the airflow directly affects the hygiene of the cooking environment and thus has a significant impact on human health. Therefore, it is essential to address the problem of insufficient cleanliness of the blower airflow. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defect in the existing air duct system that the cleanliness of the blower air is affected by the contamination of electronic components and other factors when achieving heat dissipation and dehumidification, and to provide an air duct system and a stove-steam-grill integrated machine.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] An air duct system is applicable to a stove-steam-grill combination appliance and is installed on the stove chassis of the appliance.

[0007] The air duct system includes a fan assembly, a heat dissipation channel, and a blower channel. The air inlet end of the heat dissipation channel and the air inlet end of the blower channel are respectively connected to the fan assembly. The air outlet end of the heat dissipation channel is connected to the outside. The air outlet end of the blower channel is connected to the steam oven inner cavity of the stove-steam oven.

[0008] The fan assembly includes a housing and a fan disposed within the housing. The housing includes a first air inlet and a second air inlet. Airflow entering from the first air inlet is rotated by the fan and enters the heat dissipation channel. Airflow entering from the second air inlet is rotated by the fan and enters the blower channel.

[0009] The stove chassis has a third air inlet, which is connected to the second air inlet so that external airflow enters through the third air inlet and flows to the second air inlet.

[0010] In this design, a fan simultaneously provides airflow to both the heat dissipation channel and the blower channel, thereby cooling the electronic components and dehumidifying the cavity of the steam oven. The fan assembly housing is equipped with a first air inlet for the heat dissipation channel and a second air inlet for the blower channel. Furthermore, a third air inlet is located on the cooktop chassis, providing an independent air intake channel for the second inlet. This allows for the introduction of external airflow, effectively preventing contamination from heat and particles emitted by the electronic components during entry, thus improving the cleanliness of the airflow used for dehumidification. In addition, since the cooktop chassis and the steam oven cavity experience temperature increases during operation, the airflow in the blower channel is preheated, which helps improve the temperature uniformity within the steam oven cavity and also provides some degree of heat dissipation.

[0011] Preferably, the fan is divided into a main air intake area and a secondary air intake area along its axial direction, the heat dissipation channel is located above the blower channel, the air outlet of the main air intake area enters the heat dissipation channel, and the air outlet of the secondary air intake area enters the blower channel.

[0012] In this design, the fan is configured with a main side air intake area and a secondary side air intake area, so that the fan rotation can simultaneously provide airflow to the heat dissipation channel and the blower channel.

[0013] Preferably, the diameter ratio of the first air inlet and the second air inlet is consistent with the mass flow rate ratio of the airflow in the heat dissipation channel and the blower channel.

[0014] In this solution, this configuration method can provide sufficient airflow for the heat dissipation channel and the blower channel, so as to ensure the heat dissipation and dehumidification effects.

[0015] Preferably, the diameter ratio of the first air inlet to the second air inlet is 7:3.

[0016] Preferably, the area of ​​the third air inlet is not less than the area of ​​the second air inlet.

[0017] In this solution, this configuration can prevent the airflow supply to the second air inlet from being affected by the small diameter of the third air inlet.

[0018] Preferably, the first air inlet and the second air inlet are respectively away from and facing the bottom wall of the stove base, and the third air inlet is disposed on the bottom wall of the stove base and is directly opposite to the second air inlet; the second air inlet and the third air inlet are connected by a first connecting pipe.

[0019] In this design, the second air inlet faces the bottom wall of the stove chassis, and the third air inlet is located on the bottom wall of the stove chassis. The two are arranged directly opposite each other, and the air inlet channel is short, which effectively reduces the channel resistance, reduces the momentum loss of airflow during transmission, and improves the dehumidification efficiency.

[0020] Preferably, the third air inlet is formed by a plurality of first through holes penetrating the bottom wall of the stove base, and both the first air inlet and the second air inlet are circular openings.

[0021] Preferably, the area at the connection between the first connecting pipe and the second air inlet is the same as the area of ​​the second air inlet, and the first connecting pipe is funnel-shaped.

[0022] Preferably, the air outlet of the blower channel passes through the bottom or side wall of the stove base and communicates with the steam oven inner liner.

[0023] In this design, the air intake channel between the third air inlet and the second air inlet, which are located on the bottom wall of the stove chassis, is short and has little momentum loss. As a result, the air outlet of the blower channel can be effectively supplied to either the bottom wall or the side wall.

[0024] Preferably, the first air inlet and the second air inlet are respectively away from and facing the bottom wall of the stove chassis, and the third air inlet is disposed on the side wall of the stove chassis. The third air inlet and the second air inlet are connected by a second connecting pipe, and the second connecting pipe is staggered from the blower channel.

[0025] In this solution, airflow can be introduced into the second air inlet through the third air inlet on the side wall of the stove chassis, thus adapting to more usage scenarios.

[0026] Preferably, the second connecting pipe includes an air inlet channel and an air inlet shroud. The air inlet channel is connected to the third air inlet, and the air inlet shroud is located below the fan assembly and is connected to both the air inlet channel and the second air inlet.

[0027] Preferably, the area at the connection between the air inlet shroud and the air inlet channel is not less than the area of ​​the second air inlet.

[0028] In this solution, the above configuration allows airflow to enter the fan with minimal resistance.

[0029] Preferably, the cross-sectional area of ​​the air inlet channel tends to decrease along the direction in which the airflow enters.

[0030] In this design, the air can gradually transition between the second air inlet and the bottom wall of the stove base, which also facilitates the guidance of airflow.

[0031] Preferably, the air inlet channel includes a first air inlet channel section and a second air inlet channel section. Along the direction of airflow entry, the first air inlet channel section and the second air inlet channel section are arranged sequentially, and the aspect ratio of the first air inlet channel section and the second air inlet channel section gradually decreases.

[0032] Preferably, the third air inlet is formed by a plurality of second through holes penetrating the side wall of the stove base, and both the first air inlet and the second air inlet are circular openings.

[0033] Preferably, the air outlet of the blower channel passes through the bottom wall of the stove base and communicates with the steam oven inner liner.

[0034] A combination cooktop, steam oven, and grill, comprising the air duct system described above.

[0035] The significant advantages of this invention are as follows: the fan can simultaneously provide airflow to both the heat dissipation channel and the blower channel, thereby dissipating heat from the electronic components and dehumidifying the cavity of the steam oven. The fan assembly housing is equipped with a first air inlet for the heat dissipation channel and a second air inlet for the blower channel. Furthermore, a third air inlet is located on the cooktop chassis, providing an independent air intake channel for the second air inlet. This allows for the introduction of external airflow, effectively preventing contamination from heat and particles emitted by the electronic components during entry, thus improving the cleanliness of the airflow used for dehumidification. Since the cooktop chassis and the steam oven cavity experience temperature increases during operation, the airflow in the blower channel is preheated, which helps improve the temperature uniformity within the steam oven cavity and also provides some degree of heat dissipation. Attached Figure Description

[0036] Figure 1 This is a front view of the basic structure of a stove-steam-bake combo provided in Embodiment 1 of this utility model;

[0037] Figure 2 This is a rear view of the basic structure of a stove-steam-bake combo provided in Embodiment 1 of this utility model;

[0038] Figure 3 This is a schematic diagram of the top structure of an air duct system provided in Embodiment 1 of this utility model;

[0039] Figure 4 This is a schematic diagram of the bottom structure of an air duct system provided in Embodiment 1 of this utility model;

[0040] Figure 5 This is a cross-sectional schematic diagram of an air duct system provided in Embodiment 1 of the present utility model. The cross-section is located in the middle of the heat dissipation channel and the air blowing channel.

[0041] Figure 6 This is a partially enlarged cross-sectional view of a duct system provided in Embodiment 1 of the present invention, with the cross-section located in the middle of the fan.

[0042] Figure 7 This is a schematic diagram of the stove chassis provided in Embodiment 1 of this utility model;

[0043] Figure 8 This is a cross-sectional schematic diagram of an air duct system provided in Embodiment 2 of the present utility model. The cross-section is located in the middle of the heat dissipation channel and the air blowing channel.

[0044] Figure 9 This is a three-dimensional structural diagram of the top of a stove-steam-oven combo provided in Embodiment 3 of this utility model;

[0045] Figure 10 This is a schematic diagram of the top structure of a stove-steam-oven combo provided in Embodiment 3 of this utility model;

[0046] Figure 11 This is a cross-sectional schematic diagram of an air duct system provided in Embodiment 3 of the present utility model. The cross-section is located in the middle of the heat dissipation channel and the air blowing channel.

[0047] Figure 12 This is a cross-sectional view of a duct system provided in Embodiment 3 of the present invention, with the cut-off position located in the middle of the second connecting pipe.

[0048] Explanation of reference numerals in the attached figures

[0049] A combination cooktop, steam oven, and grill 1, cooktop section 01, steam oven section 02, air duct system 03, fan assembly 100, housing 110, first air inlet 111, second air inlet 112, fan 120, main side air inlet area 121, secondary side air inlet area 122, heat dissipation channel 200, blower channel 300, blower pipe 310, cooktop chassis 400, third air inlet 410, first through hole 411, second through hole 412, bottom wall 420, side wall 430, steam oven inner liner 500, first connecting pipe 600, second connecting pipe 700, air inlet flow section 710, first air inlet flow section 711, second air inlet flow section 712, air inlet cover 720. Detailed Implementation

[0050] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0051] Example 1

[0052] like Figures 1-7 As shown, this embodiment provides an air duct system 03, which is suitable for the stove-steam-grill combo 1, such as... Figure 1 and Figure 2 As shown, the integrated stove-steam-grill oven 1 has a stove part 01 and a steaming and grilling part 02. The stove part 01 is located directly above the steaming and grilling part 02. The air duct system 03 is installed on the stove chassis 400 of the integrated stove-steam-grill oven 1 and is connected to the steaming and grilling inner liner 500 through the blower pipe 310.

[0053] like Figures 3-6 As shown, the air duct system 03 includes a fan assembly 100, a heat dissipation channel 200, and a blower channel 300. The air inlet end of the heat dissipation channel 200 and the air inlet end of the blower channel 300 are respectively connected to the fan assembly 100. The air outlet end of the heat dissipation channel 200 is connected to the outside. The air outlet end of the blower channel 300 is connected to the steam oven inner cavity 500 of the stove-steam-oven combination appliance 1. The fan assembly 100 includes a housing 110 and a fan 120 disposed within the housing 110. The housing 110 includes a first air inlet 111 and a second air inlet 112. Airflow entering through the first air inlet 111 is rotated by the fan 120 into the heat dissipation channel 200, and airflow entering through the second air inlet 112 is rotated by the fan 120 into the blower channel 300. The stove chassis 400 has a third air inlet 410, which communicates with the second air inlet 112, allowing external airflow to enter through the third air inlet 410 and flow towards the second air inlet 112. Figure 5As shown, the dashed arrows indicate the path of the cooling airflow entering from the first air inlet 111, being redirected by the fan 120, and flowing into the cooling channel 200; the dotted arrows indicate the path of the blower airflow entering from the third air inlet 410 and flowing to the second air inlet 112, being redirected by the fan 120, and flowing into the blower channel 300.

[0054] Therefore, the fan 120 can simultaneously provide airflow to the heat dissipation channel 200 and the blower channel 300, thereby dissipating heat from the electronic components and blowing air to dehumidify the cavity of the steam oven liner 500. The housing 110 of the fan assembly 100 is equipped with a first air inlet 111 for providing airflow to the heat dissipation channel 200 and a second air inlet 112 for providing airflow to the blower channel 300. Furthermore, a third air inlet 410 is provided on the cooktop chassis 400. This third air inlet 410 provides an independent air intake channel for the second air inlet 112, allowing the introduction of external airflow. This effectively prevents the external airflow from being contaminated by heat, particles, etc. emitted by the electronic components during its entry, thus improving the cleanliness of the airflow used for dehumidification. In addition, since the temperature of the cooktop chassis 400 and the steam oven liner 500 will rise during operation, the airflow in the blower channel 300 can be preheated in advance, which helps to improve the uniformity of the temperature field in the cavity of the steam oven liner 500, and can also dissipate heat from the steam oven liner 500 to a certain extent.

[0055] In specific implementation, such as Figure 1 , Figure 2 and Figure 5 As shown, the fan assembly 100 is located on one side of the cooktop chassis 400 in the width direction. The heat dissipation channel 200 extends along the width direction of the cooktop chassis 400 to the other side of the cooktop chassis 400 and can be connected to the outside through the condenser box. The blower channel 300 extends along the width direction of the cooktop chassis 400 to the other side of the cooktop chassis 400 and is connected to the steam oven inner cavity 500 below through the blower pipe 310.

[0056] like Figure 5 and Figure 6 As shown, the fan 120 is divided into a main air intake area 121 and a secondary air intake area 122 along its axial direction. The heat dissipation channel 200 is located above the blower channel 300. The air outlet of the main air intake area 121 enters the heat dissipation channel 200, and the air outlet of the secondary air intake area 122 enters the blower channel 300. The fan 120 is configured as a centrifugal fan with upper and lower air inlets, having a main air intake area 121 and a secondary air intake area 122, so that the rotation of the fan 120 can simultaneously provide airflow to both the heat dissipation channel 200 and the blower channel 300.

[0057] Specifically, such as Figure 5 and Figure 6 As shown, the fan 120 includes a motor and an impeller, and the housing 110 is a volute structure. The fan 120 is offsetly disposed within the housing 110. The main air intake area 121 and the secondary air intake area 122 are divided by the motor mounting base. The heat dissipation channel 200 is located directly above the blower channel 300, and the two are stacked together. The partition plate between the heat dissipation channel 200 and the blower channel 300 is basically aligned with the position of the motor mounting base, thereby enabling the heat dissipation channel 200 and the blower channel 300 to communicate with the main air intake area 121 and the secondary air intake area 122, respectively. Figure 3 and Figure 4 As shown, both the heat dissipation channel 200 and the air blowing channel 300 are long, roughly rectangular pipes. Specifically, as... Figure 3 As shown, the width of the heat dissipation channel 200 is basically uniform in its extending direction, such as... Figure 4 As shown, the width of the blower duct 300 is basically uniform in the area near the blower assembly 100, and then gradually narrows in its extension direction, thus gradually transitioning to docking with the blower pipe 310.

[0058] The diameter ratio of the first air inlet 111 and the second air inlet 112 is consistent with the mass flow rate ratio of the airflow in the heat dissipation channel 200 and the blower channel 300. Therefore, the airflow into the first air inlet 111 and the second air inlet 112 can match the mass flow rate of the airflow in the heat dissipation channel 200 and the blower channel 300, providing sufficient airflow to ensure effective heat dissipation and dehumidification. Figure 5 and Figure 6 As shown, the first air inlet 111 and the second air inlet 112 are respectively located on both sides of the housing 110 along the axial direction, and both are circular openings. Preferably, the diameter ratio of the first air inlet 111 and the second air inlet 112 is 7:3.

[0059] The area of ​​the third air inlet 410 is not less than the area of ​​the second air inlet 112. This can prevent the airflow supply to the second air inlet 112 from being affected due to the small diameter of the third air inlet 410.

[0060] like Figure 5 , Figure 6 and Figure 7As shown, the first air inlet 111 and the second air inlet 112 are respectively facing away from and away from the bottom wall 420 of the stove base 400. The third air inlet 410 is located on the bottom wall 420 of the stove base 400 and is directly opposite to the second air inlet 112. The second air inlet 112 and the third air inlet 410 are connected by a first connecting pipe 600. The second air inlet 112 faces the bottom wall 420 of the stove base 400, and the third air inlet 410 is located on the bottom wall 420 of the stove base 400, and the two are arranged directly opposite each other. Their air intake channels are short, effectively reducing channel resistance, minimizing momentum loss during airflow transmission, and improving the efficiency of blower dehumidification. Figure 5 and Figure 6 As shown, there is a certain gap between the housing 110 and the bottom wall 420 of the fan 120, which is effectively connected by the third air inlet 410. In other embodiments, there may be no gap between the housing 110 and the bottom wall 420 of the fan 120, in which case the housing 110 and the bottom wall 420 can fit together.

[0061] like Figure 7 As shown, the third air inlet 410 is formed by a plurality of first through holes 411 penetrating the bottom wall 420 of the stove base 400. The first through holes 411 have a thin strip structure and are evenly spaced on the bottom wall 420. At this time, the area of ​​the third air inlet 410 is not less than the area of ​​the second air inlet 112, which means that the total area of ​​the opening formed by the plurality of first through holes 411 is not less than the area of ​​the opening of the second air inlet 112.

[0062] like Figure 5 and Figure 6 As shown, the area of ​​the connection between the first connecting pipe 600 and the second air inlet 112 is the same as the area of ​​the second air inlet 112, and the first connecting pipe 600 is funnel-shaped.

[0063] like Figure 2 and Figure 5 As shown, the air outlet of the blower duct 300 passes through the side wall 430 of the cooktop chassis 400 and connects to the steam oven inner liner 500. Because the air intake channel between the third air inlet 410 and the second air inlet 112, located on the bottom wall 420 of the cooktop chassis 400, is short and has minimal momentum loss, effective air supply can be provided to the air outlet of the blower duct 300 at the side wall 430. Specifically, as... Figure 2 As shown, the side wall 430 through which the air outlet of the blower channel 300 passes is preferably selected from the back side wall 430 of the stove chassis 400 that is away from the user.

[0064] Example 2

[0065] This embodiment provides an air duct system 03, such as Figure 8As shown, the structure of the air duct system 03 in this embodiment is basically the same as that of the air duct system 03 in embodiment 1. The difference is that the air outlet of the blower channel 300 passes through the bottom wall 420 of the stove base 400 and is connected to the steam oven inner liner 500.

[0066] like Figure 8 As shown, compared to the case in Embodiment 1 where the air outlet of the blower channel 300 passes through the side wall 430 of the stove base 400, in this embodiment, when it passes through the bottom wall 420 of the stove base 400, the friction resistance of the blower channel 300 is smaller. Therefore, the structural form of the air duct system 03 in Embodiment 1 is also applicable to the case where the air outlet of the blower channel 300 passes through the bottom wall 420 of the stove base 400.

[0067] Example 3

[0068] like Figures 9-12 As shown, this embodiment provides a duct system 03. The structure of the duct system 03 in this embodiment is basically the same as that of the duct system 03 in embodiment 1, except that, as Figure 9 and Figure 12 As shown, in this embodiment, the third air inlet 410 is disposed on the side wall 430 of the stove base 400; and, as Figure 11 As shown, the air duct system 03 in this embodiment is the same as the air duct system 03 in embodiment 2. The air outlet of its blower channel 300 passes through the bottom wall 420 of the stove base 400 and is connected to the steam oven inner liner 500.

[0069] like Figure 10 , Figure 11 and Figure 12 As shown, the first air inlet 111 and the second air inlet 112 are respectively located away from and facing the bottom wall 420 of the cooktop chassis 400. The third air inlet 410 is disposed on the side wall 430 of the cooktop chassis 400. The third air inlet 410 and the second air inlet 112 are connected by a second connecting pipe 700, which is staggered from the blower channel 300. Through the third air inlet 410 on the side wall 430 of the cooktop chassis 400, airflow can be introduced into the second air inlet 112, thus adapting to more usage scenarios. Figure 10 and Figure 12 As shown, the second connecting pipe 700 is staggered with the blower channel 300, and the side wall 430 of the third air inlet 410 is one of the two side walls 430 along the length of the cooktop chassis 400, thereby preventing the air outlet of the blower channel 300 from passing through the bottom wall 420 of the cooktop chassis 400. Preferably, the second connecting pipe 700 extends along the length of the cooktop chassis 400 and is arranged perpendicularly to the blower channel 300. And, as... Figure 11As shown, there is a certain gap between the housing 110 of the fan assembly 100 and the bottom wall 420 of the stove chassis 400. The second connecting pipe 700 extends to the bottom of the housing 110 of the fan assembly 100 and connects with the location of the second air inlet 112.

[0070] like Figure 11 and Figure 12 As shown, the second connecting pipe 700 includes an air inlet channel 710 and an air inlet hood 720. The air inlet channel 710 is connected to the third air inlet 410, and the air inlet hood 720 is located below the fan assembly 100 and is connected to the air inlet channel 710 and the second air inlet 112 respectively.

[0071] The area at the connection between the air inlet shroud 720 and the air inlet channel 710 is not less than the area of ​​the second air inlet 112. This allows airflow to enter the fan 120 with less resistance. In this case, "the area of ​​the third air inlet 410 is not less than the area of ​​the second air inlet 112" means that the total area of ​​the openings formed by the plurality of second through holes 412 is not less than the area of ​​the opening of the second air inlet 112.

[0072] like Figure 12 As shown, the cross-sectional area of ​​the air inlet channel 710 decreases along the direction of airflow. This allows for a gradual transition between the second air inlet 112 and the bottom wall 420 of the cooktop chassis 400, and also facilitates airflow guidance.

[0073] like Figure 12 As shown, the air intake channel 710 includes a first air intake channel section 711 and a second air intake channel section 712. Along the direction of airflow entry, the first air intake channel section 711 and the second air intake channel section 712 are arranged sequentially, and the width-to-height ratio of both the first air intake channel section 711 and the second air intake channel section 712 gradually decreases. The width-to-height ratio of the first air intake channel section 711 refers to the ratio of its lateral width to its longitudinal height in the cross-section corresponding to the airflow. Taking the first air intake channel section 711 extending along the length of the cooktop chassis 400 as an example, it is the ratio of the width of the first air intake channel section 711 in the cooktop chassis 400 to its height in the cooktop chassis 400. Correspondingly, the width ratio of the second air intake channel section 712 is also the same.

[0074] like Figure 9 and Figure 12 As shown, the third air inlet 410 is formed by a plurality of second through holes 412 penetrating the side wall 430 of the stove base 400, and both the first air inlet 111 and the second air inlet 112 are circular openings. The second through holes 412 are evenly spaced on the side wall 430 and extend in the vertical direction.

[0075] In this embodiment, although setting the third air inlet 410 on the side wall 430 of the stove chassis 400 increases the airflow path, the airflow resistance is small when the air outlet of the blower channel 300 passes through the bottom wall 420 of the stove chassis 400, so it can also meet the dehumidification requirements of the steam oven inner cavity 500.

[0076] Example 4

[0077] This embodiment provides a stove-steam-grill combo 1, which includes an air duct system 03 as described in any of the embodiments 1-3 above.

[0078] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. An air duct system, characterized by The air duct system is suitable for the integrated stove-steam-grill appliance and is installed on the stove base of the integrated stove-steam-grill appliance; The air duct system includes a fan assembly, a heat dissipation channel, and a blower channel. The air inlet end of the heat dissipation channel and the air inlet end of the blower channel are respectively connected to the fan assembly. The air outlet end of the heat dissipation channel is connected to the outside. The air outlet end of the blower channel is connected to the steam oven inner cavity of the stove-steam oven. The fan assembly includes a housing and a fan disposed within the housing. The housing includes a first air inlet and a second air inlet. Airflow entering from the first air inlet is rotated by the fan and enters the heat dissipation channel. Airflow entering from the second air inlet is rotated by the fan and enters the blower channel. The stove chassis has a third air inlet, which is connected to the second air inlet so that external airflow enters through the third air inlet and flows to the second air inlet.

2. The air duct system of claim 1, wherein, The fan is divided into a main air intake area and a secondary air intake area along its axial direction. The heat dissipation channel is located above the blower channel. The air outlet of the main air intake area enters the heat dissipation channel, and the air outlet of the secondary air intake area enters the blower channel.

3. The air duct system of claim 1, wherein, The ratio of the diameters of the first air inlet and the second air inlet is consistent with the ratio of the mass flow rate of the airflow in the heat dissipation channel and the blower channel.

4. The air duct system of claim 3, wherein, The diameter ratio of the first air inlet to the second air inlet is 7:

3.

5. The air duct system of claim 1, wherein, The area of ​​the third air inlet is not less than the area of ​​the second air inlet.

6. The air duct system of any one of claims 1-5, wherein, The first air inlet and the second air inlet are respectively away from and facing the bottom wall of the stove base. The third air inlet is located on the bottom wall of the stove base and is directly opposite the second air inlet. The second air inlet and the third air inlet are connected by a first connecting pipe.

7. The air duct system of claim 6, wherein, The third air inlet is formed by a plurality of first through holes penetrating the bottom wall of the stove base, and both the first air inlet and the second air inlet are circular openings; And / or, the area at the connection between the first connecting pipe and the second air inlet is the same as the area of ​​the second air inlet, and the first connecting pipe is funnel-shaped.

8. The air duct system of claim 6, wherein, The air outlet of the blower channel passes through the bottom or side wall of the stove base and communicates with the steam oven inner liner.

9. The air duct system of any one of claims 1-5, wherein, The first air inlet and the second air inlet are respectively away from and facing the bottom wall of the stove chassis. The third air inlet is located on the side wall of the stove chassis. The third air inlet and the second air inlet are connected by a second connecting pipe. The second connecting pipe is staggered from the blower channel.

10. The air duct system of claim 9, wherein, The second connecting pipe includes an air inlet channel and an air inlet shroud. The air inlet channel is connected to the third air inlet, and the air inlet shroud is located below the fan assembly and is connected to both the air inlet channel and the second air inlet.

11. The air duct system of claim 10, wherein, The area at the connection between the air inlet hood and the air inlet channel is not less than the area of ​​the second air inlet.

12. The air duct system of claim 10, wherein, The cross-sectional area of ​​the air inlet channel tends to decrease along the direction in which the airflow enters.

13. The air duct system of claim 12, wherein, The air inlet channel includes a first air inlet channel section and a second air inlet channel section. Along the direction of airflow entry, the first air inlet channel section and the second air inlet channel section are arranged sequentially, and the aspect ratio of the first air inlet channel section and the second air inlet channel section gradually decreases.

14. The air duct system of claim 9, wherein, The third air inlet is formed by a plurality of second through holes penetrating the side wall of the stove base, and both the first air inlet and the second air inlet are circular openings.

15. The air duct system of claim 9, wherein, The air outlet of the blower channel passes through the bottom wall of the stove base and connects with the steam oven inner liner.

16. A cooking and steaming oven, characterized in that, The oven-steam-grill combo includes the air duct system as described in any one of claims 1-15.

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