Wind scooper and microwave oven

Abstract

The utility model provides a wind scooper and a microwave oven, the wind scooper is assembled on the heat insulation plate, the wind scooper comprises a bottom plate and coamings, the coamings comprise a first coaming and a second coaming which are oppositely arranged, one end of the first coaming and one end of the second coaming form an air inlet, and the other end of the first coaming and one end of the second coaming form an air outlet. The other end of the first coaming and the other end of the second coaming form a first air outlet structure, and a second air outlet structure is arranged at the position, close to the air inlet, of the second coaming. According to the air guide cover, air can partially flow to the side portion of the heating cavity and partially flow to the bottom of the heating cavity at the same time, heat generated by the dry burning pipe is evenly distributed, it is guaranteed that food in the heating cavity is evenly heated, and the baking effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen cooking appliances, and particularly relates to an air guide cover and a microwave oven. Background Art

[0002] With the improvement of living standards, consumers have put forward higher requirements for cooking equipment. Microwave ovens or electric ovens with single functions can no longer meet the market demand. Therefore, a microwave oven integrating microwave heating and baking has emerged as the times require and has gradually become an essential cooking appliance for family life. Since water vapor and a small amount of flue gas are generated during cooking, it is necessary to use an air duct to allow external air to enter from one side of the heating cavity and discharge from the other side; while the air at the bottom of the heating cavity is usually not circulated, resulting in uneven temperature of the dry-burning tube and affecting the final baking effect.

[0003] In view of this, the present utility model is particularly proposed. Summary of the Utility Model

[0004] The problem solved by the present utility model is that the unreasonable structure of the existing air guide cover leads to uneven heating of the heating cavity and affects the final cooking effect.

[0005] To solve the above problems, the present utility model provides an air guide cover which is arranged on a microwave oven. The microwave oven includes a heating cavity, and a heat insulation plate is arranged on the side of the heating cavity. The air guide cover is assembled on the heat insulation plate. The air guide cover includes a bottom plate and a surrounding plate. The surrounding plate includes a first surrounding plate and a second surrounding plate which are oppositely arranged. One end of the first surrounding plate and the second surrounding plate forms an air inlet, and the other end of the first surrounding plate and the second surrounding plate forms a first air outlet structure. The second surrounding plate is provided with a second air outlet structure near the air inlet.

[0006] This setting can make part of the air conveyed by the fan assembly flow to the side of the heating cavity, and at the same time part of the air flows to the bottom of the heating cavity and makes the heat generated by the dry-burning tube evenly distributed, ensuring that the food in the heating cavity is evenly heated and the baking effect is good.

[0007] Preferably, a notch is arranged on the heat insulation plate, and the notch is communicated with the heating cavity. A guiding rib is arranged on the lower side of the notch, and the guiding rib extends vertically and abuts against the inner wall surface of the first surrounding plate or the second surrounding plate. This setting can strengthen the notch and limit the assembly of the air guide cover in the horizontal direction, further improving the assembly efficiency.

[0008] Preferably, the second air outlet structure includes a first baffle rib. The first baffle rib is arranged on the bottom plate and extends in the horizontal direction. One end of the first baffle rib abuts against the second surrounding plate, and there is a gap between the other end of the first baffle rib and the first surrounding plate.

[0009] This setting causes part of the gas in the air duct structure to be blocked and directly flow downward to the lower part of the heat insulation plate, which is beneficial to the heat dissipation of the dry-burning tube and makes the temperature distribution at the bottom of the heating cavity tend to be uniform. Preferably, the second air outlet structure is arranged below the heating cavity.

[0010] Preferably, the second air outlet structure further includes a first air guiding part, and the first air guiding part includes a groove and a rib. The groove is formed by the depression of part of the enclosing plate, and the rib is located on the side of the groove close to the heat insulation plate.

[0011] This setting changes the flow direction of the air flowing upward in the air duct structure through the first baffle and makes it flow in the horizontal direction. At the same time, the first air guiding part can make the horizontally flowing air flow to the bottom of the heating cavity, so that more air flows to the dry-burning tube, ensuring that the heat distribution at the bottom of the heating cavity is more uniform due to air flow.

[0012] Preferably, the air guiding cover is provided with a third air outlet structure, and the third air outlet structure and the first air outlet structure are respectively located on both sides of the air guiding cover. This setting enables part of the air to flow to the bottom of the heating cavity and makes the heat generated by the dry-burning tube evenly distributed to ensure that the food in the heating cavity is evenly heated, with good baking effect. At the same time, it can dissipate heat from components such as the furnace lamp and thermal cut-off located on both sides of the air guiding cover.

[0013] Preferably, the third air outlet structure includes a first notch with an opening inclined upward. A first air guiding part one is arranged downstream of the first notch. The first air guiding part one includes a first baffle plate, and the first baffle plate is arranged on the bottom plate and extends obliquely downward. One end of the first baffle plate abuts against the first enclosing plate, and there is a gap between the other end of the first baffle plate and the second enclosing plate. This setting uses the first baffle plate to block part of the gas in the air duct structure and flow out through the first notch, which is beneficial to the heat dissipation of components such as the thermal cut-off on the other side of the air guiding cover.

[0014] Preferably, the first air guiding part one further includes a second baffle plate. The second baffle plate and the first baffle plate are respectively located on both sides of the first enclosing plate. An included angle α is formed between the planes where the first baffle plate and the second baffle plate are located, and the value of α is 5 - 30°. This setting can restrict the direction of the air flow out of the first notch so that it is directly opposite to components such as the thermal cut-off, which is beneficial to the heat dissipation of important devices on the microwave oven.

[0015] Preferably, the air guide cover further includes a flow guide member disposed on one side of the bottom plate close to the heat insulation plate. The flow guide member is located between the first enclosing plate and the second enclosing plate. The flow guide member includes a vertically disposed first flow guide plate, and the extension line of the first flow guide plate passes through the first baffle. This setting can divide the air flow in the air guide structure into two paths. One path mainly flows into the heating cavity and the first air outlet structure, and the other path mainly flows into the third air outlet structure. At the same time, part of the air flows through to the second air outlet structure, realizing multi-directional air outlet through one air guide cover, which is beneficial to the stable operation of the microwave oven.

[0016] Preferably, a second air guide part two is provided at a position corresponding to the notch on the air guide cover. The second air guide part two is formed by the protrusion of a part of the bottom plate toward the heat insulation plate side, and both ends are respectively connected to the flow guide member and the second enclosing plate, and are used for guiding air into the heating cavity. This setting can help change the air flow direction and guide the air into the notch.

[0017] The present invention also provides a microwave oven, including the above-mentioned air guide cover. The microwave oven has the same beneficial effects as the air guide cover, which will not be elaborated here.

[0018] Compared with the prior art, the microwave oven according to the embodiment of the present invention has the following beneficial effects: 1) The air guide cover can dissipate heat from the components on the heat insulation plate, and at the same time, part of the air circulates at the position of the dry burning tube at the bottom of the heating cavity, making the temperature distribution at the bottom of the heating cavity uniform and the cooking effect good; 2) Through the structural improvement of the air guide cover, heat can be dissipated at multiple positions at the same time, ensuring the stable performance of the components of the microwave oven, which is beneficial to the accurate detection and control of the cooking process; 3) The structural layout is reasonable, which can effectively improve the heat dissipation performance of the microwave oven. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the whole microwave oven according to Embodiment 1 of the present invention;

[0020] Figure 2 It is an assembly schematic diagram of the air guide cover, heat insulation plate and heat preservation cotton in Embodiment 1 of the present invention;

[0021] Figure 3 is Figure 2 an exploded schematic diagram of the related structure;

[0022] Figure 4 It is a schematic diagram of the structure of the air guide cover according to Embodiment 2 of the present invention;

[0023] Figure 5 It is another perspective view of the air guide cover according to Embodiment 2 of the present invention;

[0024] Figure 6Schematic structural diagram of the air guide cover described in Embodiment 3 of the present utility model;

[0025] Figure 7 Another perspective view of the air guide cover described in Embodiment 3 of the present utility model;

[0026] Figure 8 Schematic structural diagram of the air guide cover described in Embodiment 4 of the present utility model;

[0027] Figure 9 Another perspective view of the air guide cover described in Embodiment 4 of the present utility model;

[0028] Figure 10 Front view of the air guide cover described in Embodiment 4 of the present utility model.

[0029] Description of reference numerals:

[0030] 1 - Air guide cover; 11 - Bottom plate; 111 - Avoidance part; 112 - Reinforcing rib; 12 - Enclosure; 121 - First enclosure; 122 - Second enclosure; 13 - Flange; 131 - First flange; 132 - Second flange; 133 - Wire fixing part; 134 - Assembly hole; 135 - Positioning post; 14 - First baffle rib; 15 - First air guiding part; 151 - Groove; 152 - Rib; 16 - Flow guiding member; 161 - First flow guiding plate; 162 - Second flow guiding plate; 163 - Third flow guiding plate; 17 - First notch; 18 - First second air guiding part; 181 - First baffle; 182 - Second baffle; 19 - Second second air guiding part; 191 - First surface; 192 - Second surface; 2 - Heat insulation plate; 21 - Notch; 22 - Guide rib; 23 - Fixing hole; 24 - Positioning hole; 3 - Heating cavity; 31 - Support part; 32 - Convex bump; 4 - Heat preservation cotton; 5 - Dry burning tube; 6 - Thermal cut-off; 7 - Temperature sensing component; 71 - First sensor; 72 - Second sensor; 8 - Heating tube; 9 - Furnace lamp; 10 - Fan assembly. Detailed implementation manners

[0031] To make the above objects, features and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model is made with reference to the accompanying drawings. On the premise of no conflict, the technical features of each embodiment of the present utility model can be combined with each other.

[0032] It should be noted that in the present utility model, the descriptions involving "first", "second", etc. are only for descriptive purposes, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0034] Embodiment 1

[0035] As Figures 1-3 shown, a microwave oven includes a heating cavity 3, a blower assembly 10 is disposed below the heating cavity 3, a heat insulation plate 2 is disposed on the side of the heating cavity 3, a wind guide cover 1 and a furnace lamp 9 are fixedly assembled on the heat insulation plate 2, the furnace lamp 9 is located on one side of the wind guide cover 1, a wind duct structure is formed by enclosing between the wind guide cover 1 and the heat insulation plate 2, an inlet end of the wind duct structure is connected to the blower assembly 10, and the wind duct structure is communicated with the heating cavity 3 for delivering air into the heating cavity 3; the wind duct structure further includes a first air outlet structure, and the furnace lamp 9 is disposed adjacent to the first air outlet structure and is in the air outlet direction of the first air outlet structure.

[0036] This setting can not only drive the air flow in the heating cavity 3 through the wind duct structure formed between the wind guide cover 1 and the heat insulation plate 2, but also make part of the air flow to the furnace lamp 9 located on the side of the heating cavity 3, ensuring the stable and reliable operation of the furnace lamp 9 and a long service life.

[0037] As an example of the present utility model, the air guide cover 1 includes a bottom plate 11. There is a gap between the bottom plate 11 and the heat insulation plate 2, and a relief portion 111 is formed by protruding at one end close to the furnace lamp 9. A first sensor 71 is arranged at a position corresponding to the relief portion 111 on the heat insulation plate 2. This setting can effectively discharge the water vapor generated in the heating chamber 3 in time, and at the same time cool the first sensor 71 and the furnace lamp 9 synchronously, so that the first sensor 71 is at a lower temperature, ensuring that the temperature rise speed meets the requirements and greatly improving the service life. It has important practical significance for accurately controlling the cooking firepower, time and progress to ensure the cooking effect. As an example of the present utility model, the bottom plate 11 is provided with a reinforcing rib 112 on the side away from the heat insulation plate 2. This setting can further improve the mechanical strength of the air guide cover 1 and has a long service life.

[0038] Preferably, a dry-burning tube 5 is arranged at the bottom of the heating chamber 3, and a heating tube 8 is arranged at the top of the heating chamber 3. Part of the heating tube 8 is located inside the heating chamber 3. This setting can heat from the upper and lower sides of the heating chamber 3, and the heat radiation generated by the heating tube 8 directly acts on the food, with a fast heating speed and good heat uniformity of the food.

[0039] Preferably, preferably, support portions 31 that protrude inward and extend in the horizontal direction are arranged on both sides of the heating chamber 3. A convex bump 32 is arranged above the support portions 31. There is a gap between the convex bump 32 and the support portions 31 for limiting and assembling the baking tray assembly. This setting can limit the baking tray assembly by using the support portions 31 and the convex bump 32 when the user partially pulls out the baking tray assembly, preventing the baking tray assembly from falling out and being damaged, and has strong practicability. Preferably, the width of the convex bump 32 is smaller than the width of the support portions 31 and is located at the front end of the support portions 31. This setting can reduce the pulling resistance of the baking tray assembly and is convenient to set.

[0040] As an example of the present utility model, a heat preservation cotton 4 is arranged on the side of the heat insulation plate 2 close to the heating chamber 3. This setting can effectively prevent the heat dissipation of the heating chamber 3, and the cooking efficiency of the food is high; at the same time, it ensures that the ambient temperature of the components located on the side of the heating chamber 3 will not be too high, and the operation stability is good. Preferably, heat preservation cotton is arranged on both sides of the heating chamber 3 respectively. The microwave oven further includes a magnetron, and the magnetron is located on the side of the heating chamber away from the air guide cover 1. This setting can use microwaves to heat food and meet the diverse needs of users for cooking food.

[0041] As an example of the present utility model, a thermal cut-off 6 is provided on the heat insulation plate 2. The thermal cut-off 6 is located on the side of the air guide cover 1 away from the furnace lamp 9 and is electrically connected to the controller. When the temperature in the heating cavity 3 of the microwave oven exceeds a preset safety limit value, the thermal cut-off 6 will automatically cut off the power supply, causing the microwave oven to stop working, thereby avoiding damage to the equipment due to high temperature; at the same time, it helps to maintain the stability of the temperature inside the heating cavity 3, thus ensuring uniform heating of the food and avoiding local overheating or burning.

[0042] Preferably, the microwave oven further includes a temperature sensing component 7 electrically connected to the controller. The temperature sensing component 7 includes a first sensor 71 and a second sensor 72. The second sensor 72 is disposed at the top of the heating cavity 3 for detecting the internal temperature of the heating cavity 3. This setting enables the temperature sensing component 7 to accurately detect the internal temperature of the heating cavity 3, resulting in good cooking effects.

[0043] Embodiment 2

[0044] As Figures 4-5 , an air guide cover 1 includes a bottom plate 11 and a surrounding plate 12. A flanging 13 is provided at the edge of the surrounding plate 12. The flanging 13 extends towards the side of the surrounding plate 12 away from the bottom plate 11. The flanging 13 is provided with a mounting structure for fixedly connecting with the heat insulation plate 2. This setting utilizes the surrounding plate 12 to guide air to flow into the heating cavity 3 and towards the position of the furnace lamp 9. The structure is simple and can dissipate heat from the components on the side of the heating cavity 3, with good operating stability.

[0045] As an example of the present utility model, the surrounding plate 12 includes a first surrounding plate 121 and a second surrounding plate 122 which are oppositely arranged. One end of the first surrounding plate 121 and the second surrounding plate 122 forms an air inlet, and the other end forms a first air outlet structure. The flow direction of the air flow at the air inlet is perpendicular to the flow direction of the air flow at the air outlet structure. This setting enables a part of the air conveyed by the fan assembly 10 to flow into the heating cavity 3 through the air guide cover 1, and a part to flow forward from the first air outlet structure of the air guide cover 1. The contact area with the heat insulation plate 2 is large. On the basis of the heat insulation cotton 4, air isolation is formed to further prevent the heat inside the heating cavity 3 from dissipating outward, with good heat preservation and insulation effects.

[0046] As an example of the present utility model, the flanging 13 includes a first flanging 131 and a second flanging 132. The first flanging 131 is connected to the first surrounding plate 121, and the second flanging 132 is connected to the second surrounding plate 122. The first flanging 131 and the second flanging 132 are in the same plane and are provided with a mounting structure. This setting can quickly fix the air guide cover 1 on the heat insulation plate 2, with high assembly efficiency.

[0047] As an example of the present utility model, the installation structure includes an assembly hole 134 and a fixing hole 23. One of the assembly hole 134 and the fixing hole 23 is located on the air guide cover 1, and the other one of the assembly hole 134 and the fixing hole 23 is located on the heat insulation plate 2. The assembly hole 134 and the fixing hole 23 are connected by screws. This setting structure is simple and convenient for production and processing.

[0048] Preferably, the installation structure further includes a positioning post 135 and a positioning hole 24. One of the positioning post 135 and the positioning hole 24 is located on the air guide cover 1, and the other one of the positioning post 135 and the positioning hole 24 is located on the heat insulation plate 2. The positioning post 135 can be inserted and assembled into the positioning hole 24. This setting can realize the pre-positioning of the air guide cover 1 and the heat insulation plate 2, and at the same time limit the air guide cover 1 in the vertical plane, with high assembly efficiency and not easy to shake.

[0049] Preferably, a notch 21 is provided on the heat insulation plate 2, and a guiding rib 22 is provided at the bottom of the notch 21. The guiding rib 22 extends vertically and abuts against the inner wall surface of the first enclosing plate 121 or the second enclosing plate 122. The air guiding structure can communicate with the heating cavity 3 through the notch 21, and at the same time, the provided guiding rib 22 can strengthen the notch 21 and limit the assembly of the air guide cover 1 in the horizontal direction, further improving the assembly efficiency. Preferably, there are two guiding ribs 22 which are arranged at intervals, and the two guiding ribs 22 respectively abut against the inner wall surfaces of the first enclosing plate 121 and the second enclosing plate 122.

[0050] As an example of the present utility model, a wire fixing part 133 is provided on the first flanging 131 or the second flanging 132. This setting can limit and restrain the connecting wire of the microwave oven to ensure stable and reliable connection.

[0051] Embodiment 3

[0052] In order to further improve the heat dissipation performance of the microwave oven, the applicant further improves on the basis of Embodiments 1-2:

[0053] Such as Figures 6-7As shown in the figure, an air guide cover 1 is provided on a microwave oven. The microwave oven includes a heating cavity 3. A heat insulation plate 2 is provided on the side of the heating cavity 3. The air guide cover 1 and a furnace lamp 9 are fixedly assembled on the heat insulation plate 2. The furnace lamp 9 is located on one side of the air guide cover 1. A dry burning tube 5 is provided at the bottom of the heating cavity 3. A duct structure is formed by enclosing between the heat insulation plate 2 and the air guide cover 1. The inlet end of the duct structure is connected to a fan assembly 10. The duct structure is communicated with the heating cavity 3 and is used to drive the air flow in the heating cavity 3. A first air outlet structure is provided at the upper part of the duct structure. The furnace lamp 9 is adjacent to the first air outlet structure and is located in the air outlet direction of the first air outlet structure. A second air outlet structure is provided at the lower part of the duct structure and is used to drive the air flow at the dry burning tube 5. This setting can make part of the air transported by the fan assembly 10 flow into the heating cavity 3 and the side of the heating cavity 3, and at the same time part of it flows to the bottom of the heating cavity 3 to make the heat generated by the dry burning tube 5 evenly distributed, ensuring that the food in the heating cavity 3 is evenly heated and the baking effect is good.

[0054] As an example of the present utility model, the second air outlet structure includes a first baffle rib 14. The first baffle rib 14 is provided on the bottom plate 11 and extends in the horizontal direction. One end of the first baffle rib 14 abuts against the second enclosing plate 122, and there is a gap between the other end of the first baffle rib 14 and the first enclosing plate 121. This setting makes part of the gas in the duct structure blocked and directly flow to the lower part of the heat insulation plate 2, which is beneficial to the heat dissipation of the dry burning tube 5 and makes the temperature distribution at the bottom of the heating cavity 3 tend to be uniform. Preferably, the second air outlet structure is arranged lower than the heating cavity 3.

[0055] Preferably, the second air outlet structure further includes a first air guiding part 15. The first air guiding part 15 includes a groove 151 and a rib 152. The groove 151 is formed by the depression of part of the enclosing plate 12 and the flanging 13. The rib 152 is located on the side of the groove 151 close to the heat insulation plate 2 and is used to guide the air in the duct structure to the dry burning tube 5. This setting changes the flow direction of the upward flowing air in the duct structure through the first baffle rib 14 and makes it flow in the horizontal direction. At the same time, the first air guiding part 15 can make the horizontally flowing air flow to the bottom of the heating cavity 3, so that more air flows to the dry burning tube 5, ensuring that the heat distribution at the bottom of the heating cavity 3 is more uniform due to the air flow.

[0056] Embodiment 4

[0057] In order to further improve the heat dissipation performance of the microwave oven, the applicant further proposes the following solution on the basis of Embodiments 1-3:

[0058] As Figures 8-10As shown in the figure, there is an air guide cover 1 installed on a microwave oven. The microwave oven includes a heating cavity 3, and a heat insulation plate 2 is arranged on the side of the heating cavity 3. The air guide cover 1, a furnace lamp 9, and a thermal cut-off 6 are fixedly assembled on the heat insulation plate 2. The furnace lamp 9 and the thermal cut-off 6 are respectively located on both sides of the air guide cover 1. A dry-burning tube 5 is arranged at the bottom of the heating cavity 3. A duct structure is formed by enclosing between the heat insulation plate 2 and the air guide cover 1. The inlet end of the duct structure is connected to a fan assembly 10, and the duct structure communicates with the heating cavity 3 to drive the air flow in the heating cavity 3. A first air outlet structure is arranged at the upper part of the duct structure, and the furnace lamp 9 is located in the air outlet direction of the first air outlet structure. A second air outlet structure is arranged at the lower part of the duct structure to drive the air flow at the dry-burning tube 5. The air guide cover 1 is provided with a third air outlet structure, and the thermal cut-off 6 is located in the air outlet direction of the third air outlet structure. This setting enables part of the air conveyed by the fan assembly 10 to flow into the heating cavity 3, and at the same time part of it flows to the bottom of the heating cavity 3 to make the heat generated by the dry-burning tube 5 evenly distributed, ensuring that the food in the heating cavity 3 is evenly heated and the baking effect is good. At the same time, it can dissipate heat from components such as the furnace lamp 9 and the thermal cut-off 6 on both sides of the air guide cover 1.

[0059] As an example of the present invention, the third air outlet structure includes a first notch 17 with an opening inclined upward. A first air guiding part 18 is arranged downstream of the first notch 17. The first air guiding part 18 includes a first baffle 181. The first baffle 181 is arranged on the bottom plate 11 and extends obliquely downward. One end of the first baffle 181 abuts against the first enclosing plate 121, and there is a gap between the other end of the first baffle 181 and the second enclosing plate 122. This setting enables part of the gas in the duct structure to be blocked by the first baffle 181 and flow out through the first notch 17, which is beneficial to the heat dissipation of components such as the thermal cut-off 6 on the other side of the air guide cover 1.

[0060] Preferably, the first air guiding part 18 further includes a second baffle 182. The second baffle 182 and the first baffle 181 are respectively located on both sides of the first enclosing plate 121. An included angle α is formed between the planes where the first baffle 181 and the second baffle 182 are located, and the value of α is 5 - 30°. This setting can restrict the direction of the air flow out of the first notch 17 to make it directly face components such as the thermal cut-off 6, which is beneficial to the heat dissipation of important devices on the microwave oven.

[0061] Preferably, the air guide cover 1 further includes a flow guide member 16. The flow guide member 16 is disposed on the side of the bottom plate 11 close to the heat insulation plate 2, and the flow guide member 16 is located between the first enclosing plate 121 and the second enclosing plate 122. This setting can divide the air flow in the air guide structure into two paths. One path mainly flows into the heating cavity 3 and the first air outlet structure, and the other path mainly flows into the third air outlet structure. At the same time, part of the air flows through to the second air outlet structure, realizing multi-directional air outlet through one air guide cover 1, which is beneficial to the stable operation of the microwave oven.

[0062] As an example of the present invention, the flow guide member 16 includes a first flow guide plate 161 vertically disposed. The extension line of the first flow guide plate 161 passes through the first baffle 181. The horizontal distances between the first flow guide plate 161 and the first enclosing plate 121 and the second enclosing plate 122 are L1 and L2 respectively, where L1 < L2. This setting can enable the air between the first flow guide plate 161 and the first enclosing plate 121 to flow out smoothly through the third air outlet structure, while part of the air between the first flow guide plate 161 and the second enclosing plate 122 enters the heating cavity 3, and part of the air flows out through the first air outlet structure. Preferably, L1 = (0.3 - 0.5) * L2.

[0063] Preferably, the flow guide member 16 further includes a second flow guide plate 162 and a third flow guide plate 163 which are connected end to end. The end of the second flow guide plate 162 far from the third flow guide plate 163 is connected to the end of the first flow guide plate 161, and the end of the third flow guide plate 163 far from the second flow guide plate 162 is connected to the first flow guide plate 161. The second flow guide plate 162 and the third flow guide plate 163 are respectively inclined towards the first air outlet structure with inclination angles of β1 and β2, where β1 > β2. This setting is beneficial to form a flared portion downstream of the first notch 17, which is beneficial to guiding the air to the first notch 17.

[0064] Preferably, a second air guide portion 19 is disposed at a position corresponding to the notch 21 on the air guide cover 1. The second air guide portion 19 is formed by the bottom plate 11 bulging towards the heat insulation plate 2 side and is respectively connected to the flow guide member 16 and the second enclosing plate 122 at both ends. This setting can be beneficial to changing the flow direction of the air and guiding the air into the notch 21. As an example of the present invention, the second air guide portion 19 includes an inclined first surface 191 and a second surface 192. This setting has a simple structure and is convenient for production and processing.

[0065] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

1. An air guide cover arranged on a microwave oven, the microwave oven comprising a heating chamber (3), a heat insulation board (2) being arranged on the side of the heating chamber, the air guide cover (1) being assembled on the heat insulation board (2), characterized in that: The air guide cover (1) comprises a bottom plate (11) and a surrounding plate (12); the surrounding plate (12) comprises a first surrounding plate (121) and a second surrounding plate (122) which are arranged opposite to each other; one end of the first surrounding plate (121) and the second surrounding plate (122) form an air inlet; the other end of the first surrounding plate (121) and the second surrounding plate (122) form a first air outlet structure; the second surrounding plate (122) is provided with a second air outlet structure at a position close to the air inlet.

2. The air guide cover according to claim 1, characterized in that: A notch (21) is provided on the heat insulation board (2), the notch (21) being in communication with the heating chamber (3), a guide rib (22) being provided on the lower side of the notch (21), the guide rib (22) extending vertically and abutting against the inner wall surface of the first enclosure (121) or the second enclosure (122).

3. The air guide cover according to claim 1 or 2, characterized in that: The second air outlet structure comprises a first baffle (14), wherein the first baffle (14) is arranged on the bottom plate (11) and extends in a horizontal direction, one end of the first baffle (14) abuts against the second enclosure plate (122), and a gap exists between the other end of the first baffle (14) and the first enclosure plate (121).

4. The air guide cover according to claim 3, characterized in that: The second air outlet structure further comprises a first air guide portion (15), the first air guide portion (15) comprising a groove (151) and a convex rib (152), the groove (151) being formed by a depression of a portion of the enclosure (12), and the convex rib (152) being located on a side of the groove (151) close to the heat insulation board (2).

5. The air guide cover according to claim 1, characterized in that: The air guide cover (1) is provided with a third air outlet structure, and the third air outlet structure and the first air outlet structure are respectively located on two sides of the air guide cover (1).

6. The air guide cover according to claim 5, characterized in that: The third air outlet structure comprises a first notch (17) opening obliquely upward, a second air guide portion (18) is arranged downstream of the first notch (17), the second air guide portion (18) comprises a first baffle (181), the first baffle (181) is arranged on the bottom plate (11) and extends obliquely downward, one end of the first baffle (181) abuts against the first enclosure (121), and a gap exists between the other end of the first baffle (181) and the second enclosure (122).

7. The air guide cover according to claim 6, characterized in that: The second air guide portion (18) further comprises a second baffle (182), wherein the second baffle (182) and the first baffle (181) are respectively located on two sides of the first enclosure (121), and an angle α is formed between the planes where the first baffle (181) and the second baffle (182) are located, and the value of α is 5-30°.

8. The air guide cover according to claim 7, characterized in that: The air guide cover (1) further comprises a flow guide member (16), wherein the flow guide member (16) is arranged on a side of the bottom plate (11) close to the heat insulation plate (2), and the flow guide member (16) is located between the first enclosure plate (121) and the second enclosure plate (122), and the flow guide member (16) comprises a first flow guide plate (161) arranged vertically, and an extension line of the first flow guide plate (161) is arranged to pass through the first baffle plate (181).

9. The air guide cover according to claim 8, characterized in that: A second air guide portion (19) is provided at a position of the air guide cover (1) corresponding to the notch (21); the second air guide portion (19) is formed by a portion of the bottom plate (11) protruding toward one side of the heat insulation plate (2), and the two ends of the second air guide portion (19) are respectively connected to the air guide member (16) and the second enclosure plate (122), and is used for guiding air into the heating chamber (3).

10. A microwave oven, characterized in that: It comprises the air guide hood (1) as described in any one of claims 1 to 9.

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