Drawer type microwave oven

Abstract

The invention provides a drawer type microwave oven which comprises a shell, a cooking cavity, a heat insulation frame assembly and a circulating hot air assembly, the cooking cavity and the heat insulation frame assembly are sequentially arranged from inside to outside, a heat insulation part is arranged between the cooking cavity and the heat insulation frame assembly, and the circulating hot air assembly is used for circularly heating the cooking cavity; a vertically-placed partition plate is arranged in the shell, the cooking cavity is located on the front side of the partition plate, a fan assembly and a magnetron are arranged on the side, away from the cooking cavity, of the partition plate, the magnetron right faces the outlet end of the fan assembly, and a frequency conversion plate is arranged in the fan assembly. According to the drawer type microwave oven with the heating and microwave functions, the heat insulation frame assembly and the heat insulation piece are arranged on the outer side of the cooking cavity, so that heat can be gathered in the cooking cavity, the cooking cavity has a good temperature rising speed, and the cooking efficiency and the cooking effect are improved; and heat dissipation requirements of related components in the drawer type microwave oven can be met through one fan.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and more particularly, to a drawer-type microwave oven. Background Art

[0002] With the increasing demand for the integration of kitchen appliances and space optimization, drawer-type microwave ovens have gradually become an important equipment for modern homes and commercial kitchens due to their embedded installation and space-saving features; among them, drawer-type microwave ovens with a hot air circulation component can achieve diverse cooking functions and enhance the aesthetics of the kitchen, thus being widely favored.

[0003] Since drawer-type microwave ovens are usually embedded in the kitchen space, limited by the installation space of the slide rails and the requirements of users for pushing and pulling operations, the microwaves generated by the magnetron are usually input from the bottom of the cooking cavity, resulting in a relatively high overall height and the need for a long waveguide box for microwave conduction, which reduces the market competitiveness of the product.

[0004] In view of this, the present invention is specifically proposed. Summary of the Invention

[0005] The problem solved by the present invention is that the unreasonable structure of the existing drawer-type microwave oven leads to relatively large dimensions, especially the height, and insufficient product competitiveness.

[0006] To solve the above problems, the present invention provides a drawer-type microwave oven, including a housing and a heat insulation cavity assembly. The heat insulation cavity assembly includes a cooking cavity and a heat insulation rack assembly arranged in sequence from the inside to the outside. A heat insulation member is arranged between the cooking cavity and the heat insulation rack assembly. The drawer-type microwave oven further includes a circulating hot air assembly for circulating and heating the cooking cavity. A vertically placed partition is arranged in the housing. The cooking cavity is located on the front side of the partition. A blower assembly and a magnetron are arranged on the side of the partition away from the cooking cavity. The magnetron is arranged opposite to the outlet end of the blower assembly. A frequency conversion board is arranged in the blower assembly.

[0007] The drawer-type microwave oven of the present application has both heating and microwave functions, and the cooking mode is more diverse. At the same time, by arranging a heat insulation rack assembly and a heat insulation member outside the cooking cavity, the cooking cavity can be heat-accumulated to have a good heating rate, which helps to improve the cooking efficiency and cooking effect. In addition, it can also effectively prevent the heat in the cooking cavity from being transferred to the outside, thereby playing a role in heat insulation and heat resistance, so that a single blower can meet the heat dissipation requirements of the relevant components in the drawer-type microwave oven with heating and microwave functions. The outdoor air first passes through the frequency conversion board, then passes through the magnetron and dissipates heat from it in sequence. The heat dissipation requirements of the frequency conversion board and the magnetron are met by a single blower assembly. Further increase the air intake area and reduce the air intake resistance, thereby improving the heat dissipation efficiency.

[0008] Preferably, the cooking cavity includes a rear cavity plate, the upper part of the rear cavity plate is inclined forward, the drawer-type microwave oven further includes a waveguide box, the waveguide box is connected to the magnetron, and is used to input the microwave generated by the magnetron obliquely downward from the upper part of the rear cavity plate to heat food.

[0009] This setting enables the microwave stirring structure and the waveguide box to be installed in the inclined area above the bottom plate, reducing the overall height of the product; at the same time, the microwave generated by the magnetron is input obliquely downward from the rear side of the cooking cavity, making the input microwave face the middle position at the bottom of the cooking cavity, resulting in a good cooking effect on food; at the same time, it can shorten the size of the waveguide box and make the overall structure more compact.

[0010] Preferably, the circulating hot air component is located at the top of the cooking cavity, and is used to heat the gas inhaled from the top, and then circulate and convey it to the cooking cavity from the left and right sides. This setting enables the generated hot air to be blown out from the lower positions on both sides and then rise naturally, thereby increasing the contact area and duration with food; by cooperating with microwave heating, it meets the multiple requirements of users for cooking speed, taste, and health.

[0011] Preferably, a vertically placed partition is arranged inside the housing, the cooking cavity is located on the front side of the partition, a blower assembly and a magnetron are arranged on the side of the partition away from the cooking cavity, the magnetron is arranged opposite to the outlet end of the blower assembly, and one end of the waveguide box passes through the partition and is connected to the magnetron.

[0012] Preferably, the housing includes a top plate, a left side plate, a right side plate, a rear side plate, and a bottom plate, the partition is respectively connected to the top plate, the left side plate, the right side plate, and the bottom plate, the partition is arranged parallel to the rear side plate, and at least two of the left side plate, the rear side plate, and the bottom plate are provided with air inlet structures, and the air inlet structures are located on the side of the partition away from the cooking cavity. This setting greatly improves the heat dissipation efficiency per unit volume through the coordinated air inlet from at least two directions of the left side plate, the rear side plate, and the bottom plate, combined with the directional air duct formed by the partition, thereby improving the heat dissipation requirements of the inverter board and the magnetron.

[0013] Preferably, feet are arranged below the bottom plate, and a convex part is formed by partially protruding the rear side plate away from the cooking cavity. This setting can ensure that there is a gap between the bottom plate and the bottom surface of the embedded space, and a gap between the rear side plate and the rear wall of the embedded space, facilitating the entry of external air into the housing through the air inlet structure.

[0014] Preferably, an air guide hood is provided on the partition board, and an air guide opening is provided on the partition board. The inlet end of the air guide hood is arranged opposite to the magnetron for discharging the air flow from the air outlet of the fan assembly through the air guide opening; the drawer-type microwave oven further includes an electronic control board, and the electronic control board is fixed on the side of the partition board away from the cooking cavity and above the air guide hood.

[0015] This setting can effectively restrict the flow direction of the hot air flow after heat dissipation, so as to ensure that the fan assembly always sucks cold air for the heat dissipation of electrical components; at the same time, when the fan assembly conveys external air, it can suck and disturb the air around the electronic control board, so that the heat dissipation of components such as the electronic control board, magnetron, and frequency conversion board can be achieved by one fan assembly.

[0016] Preferably, the cooking cavity includes a cavity front plate, and an air outlet is provided on the side of the cavity front plate close to the fan assembly. The air guide opening is located on the side of the partition board away from the fan assembly, and a heat dissipation channel is formed between the air guide opening and the air outlet. This setting can restrict the flow direction of the heat dissipation air flow, making its flow path long outside the cooking cavity and having a good heat dissipation effect; at the same time, it can also dissipate heat from structures such as the drive motor and lighting component, making the structure more reasonable.

[0017] Preferably, the cooking cavity further includes a U-shaped frame. An air inlet hole and an air outlet hole are provided at one end of the U-shaped frame close to the cavity front plate. The air inlet hole and the air outlet hole are located on the left and right sides of the cooking cavity, and the air outlet hole is arranged on the side away from the air guide opening of the air inlet.

[0018] This setting can allow part of the air to enter the cooking cavity through the air inlet hole according to the air pressure difference and be discharged from the air outlet hole on the other side, thus avoiding the accumulation of oil droplets, water vapor, etc. generated during cooking in the cooking cavity and not significantly interfering with the circulating heating air flow in the cooking cavity. One fan assembly can drive the gas flow inside and outside the cooking cavity at the same time, with low energy consumption.

[0019] Preferably, the drawer-type microwave oven further includes a drawer. The drawer is connected to the heat insulation cavity assembly in a manner that can move back and forth in the cooking cavity. Rollers are respectively arranged on the left and right sides of the drawer. The rollers are in rolling contact with the bottom wall of the cooking cavity and also in rolling contact with the side wall of the cooking cavity; the included angle between the rotation center axis of the roller and the horizontal plane is 30° - 60°.

[0020] This setting enables the rollers to be in rolling contact with the bottom wall and also have a clearance fit or rolling contact with the side wall. On the one hand, it ensures the normal pulling process of the drawer, and on the other hand, it enables the cavity itself to provide a limiting effect on the rollers and the drawer in the left and right directions.

[0021] Preferably, in the direction of the rotation center axis of the roller, a first conical surface is arranged on one side of the roller, and a second conical surface is arranged on the other side, the first conical surface is in rolling contact with the side wall, the second conical surface is in rolling contact with the bottom wall, a transition inclined surface is arranged between the bottom wall and the side wall, the circumferential surface of the roller is in rolling contact with the transition inclined surface, and the transition inclined surface is parallel to the rotation center axis of the roller.

[0022] This arrangement can support the circumferential surface of the roller, which not only avoids part of the roller structure being in an overhead state, which is beneficial to improving the force distribution of the roller, but also increases the contact area between the roller and the U-shaped frame, which is beneficial to ensure the smooth rolling of the roller and improve the smoothness of the drawer's movement during pulling and retracting.

[0023] Compared with the prior art, the drawer-type microwave oven described in the embodiment of the present invention has the following beneficial effects:

[0024] 1) The drawer-type microwave oven of the present invention has both heating and microwave functions. By arranging a heat insulation frame assembly and a heat insulation member outside the cooking cavity, the cooking cavity can be heat-collected so that it has a good heating rate, which helps to improve cooking efficiency and cooking effect; it can also effectively prevent the heat in the cooking cavity from being transferred to the outside, thereby playing a role of heat insulation and heat resistance, making it possible for a fan to meet the heat dissipation requirements of relevant components in the drawer-type microwave oven with heating and microwave functions;

[0025] 2) The microwaves generated by the magnetron are input obliquely downward from the rear side of the cooking cavity, so that the input microwaves are directed toward the middle position of the bottom of the cooking cavity, which has a good cooking effect on food;

[0026] 3) The hot air generated is blown out from the lower positions on both sides and then rises naturally, thereby increasing the contact area and duration with the food;

[0027] 4) Under the suction effect of a fan component, outdoor air passes through the inverter board and dissipates heat; at this time, the air around the electric control board can be sucked and disturbed to meet its heat dissipation needs, and then blown to the magnetron to dissipate heat;

[0028] 5) Since the air inlet and outlet are located on the upstream side of the heat dissipation duct, part of the heat dissipation air enters the cooking cavity under the action of the wind pressure difference, so that the oil droplets, water vapor, etc. generated in the cooking cavity are discharged from the air outlet on the other side. Since the air temperature of the heat dissipation duct itself is relatively high, a small amount of air entering the cooking cavity will not affect the normal heating of the cooking cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the drawer-type microwave oven of the present invention in an open state;

[0030] Figure 2Schematic diagram of the overall structure of the drawer - type microwave oven according to the present invention;

[0031] Figure 3 Schematic diagram of the structure of the drawer - type microwave oven according to the present invention with the rear side plate hidden;

[0032] Figure 4 Exploded schematic diagram of the internal structure of the drawer - type microwave oven according to the present invention;

[0033] Figure 5 Schematic diagram of the internal structure of the drawer - type microwave oven according to the present invention;

[0034] Figure 6 Another perspective view of the drawer - type microwave oven according to the present invention in the open state;

[0035] Figure 7 Schematic diagram of the structure of the drawer in the drawer - type microwave oven according to the present invention;

[0036] Figure 8 Partial schematic diagram of the roller at the connection of the bottom wall and the side wall of the U - shaped frame according to the present invention;

[0037] Figure 9 Another partial schematic diagram of the roller at the connection of the bottom wall and the side wall of the U - shaped frame according to the present invention.

[0038] Explanation of reference numerals:

[0039] 100 - cabinet; 101 - air intake structure; 10 - housing; 11 - top plate; 12 - left side plate; 13 - right side plate; 14 - rear side plate; 141 - convex part; 15 - bottom plate; 16 - partition; 161 - air guiding port; 17 - wind - blocking plate; 20 - cooking cavity; 21 - rear plate of the cavity; 22 - front plate of the cavity; 221 - air outlet; 23 - U - shaped frame; 2310 - bottom wall; 2320 - side wall; 2321 - air intake hole; 2322 - air outlet hole; 2330 - transition slope; 30 - fan assembly; 40 - magnetron; 50 - circulating hot - air assembly; 60 - electronic control board; 70 - drive motor; 80 - air guiding cover; 90 - waveguide box; 200 - drawer; 210 - first slide rail assembly; 212 - first movable rail; 213 - first connecting rail; 220 - second slide rail assembly; 222 - second movable rail; 223 - second connecting rail; 230 - third slide rail assembly; 232 - third movable rail; 233 - third connecting rail; 240 - door body; 250 - carrier; 251 - assembly plate; 260 - roller; 261 - first conical surface; 262 - second conical surface; 263 - circumferential surface of the wheel; 300 - control box. Detailed implementation manners

[0040] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of specific embodiments of the present invention will be given with reference to the accompanying drawings. On the premise of no conflict, the technical features of the embodiments of the present invention can be combined with each other.

[0041] It should be noted that all terms indicating directionality and positional indication in the present invention, such as: "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "top", "bottom", "lateral", "longitudinal", "center", etc., are only used to explain the relative positional relationship and connection situation between components under a certain specific state (as shown in the accompanying drawings), and are only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features.

[0042] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0043] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" 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 invention. 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.

[0044] Embodiment 1

[0045] As Figures 1-5 shown, a drawer-type microwave oven includes a heat-insulating cavity assembly. The heat-insulating cavity assembly includes a cooking cavity 20. The cooking cavity 20 includes a cavity rear plate 21. The upper part of the cavity rear plate 21 is inclined forward. The drawer-type microwave oven includes a magnetron 40 and a waveguide box 90. One end of the waveguide box 90 is connected to the magnetron 40, and is used to input the microwave generated by the magnetron 40 from the upper part of the cavity rear plate 21 to heat food.

[0046] This setting enables the microwave generated by the magnetron 40 to be input obliquely downward from the rear side of the cooking cavity 20, making the input microwave face the middle position at the bottom of the cooking cavity 20, resulting in a good cooking effect on food; at the same time, it can shorten the size of the waveguide box 90 and the microwave stirring device is arranged in the inclined space at the rear side of the cooking cavity 20, making the overall structure more compact.

[0047] Preferably, the drawer-type microwave oven further includes a circulating hot air component 50 communicated with the cooking cavity 20. The circulating hot air component 50 is located at the top of the cooking cavity 20 and is used to heat the inhaled gas at the top and circulate and convey the heated gas to the cooking cavity 20 from the left and right sides. This setting enables the drawer-type microwave oven to use microwaves to quickly penetrate into the interior of the food and generate heat by friction with water molecules, shortening the thawing or heating time, while the heating tube heats the food surface through radiation and convection to form a crispy layer, which can meet the multiple requirements of users for cooking speed, taste, and health.

[0048] Preferably, the heat insulation cavity component further includes a heat insulation rack component. The heat insulation rack component is coated on the outer surface of the cooking cavity 20, and a heat insulation member is arranged between the cooking cavity 20 and the heat insulation rack component. This setting can form a heat insulation cavity component by sequentially arranging the cooking cavity 20 and the heat insulation rack component from the inside to the outside, thereby preventing the heat in the cooking cavity 20 from being transferred to the outside, playing a role in heat insulation and heat resistance, reducing the heat dissipation load of related components; in addition, it can accumulate heat for the cooking cavity 20 to make it have a good heating rate, which helps to improve the cooking efficiency and cooking effect and also reduces the energy consumption.

[0049] As an example of the present invention, the heat insulation rack component includes a top rack, a left rack, a bottom rack, a right rack, and a rear rack. The top rack, the left rack, the bottom rack, and the right rack are sequentially connected end to end to enclose a receiving space, and the inner cavity component is arranged in the receiving space and is assembled in a conventional manner, which will not be elaborated here. For the material of the heat insulation member, it can be conventional heat insulation cotton or other conventional heat insulation materials, and the present application does not make specific limitations on it.

[0050] Preferably, the drawer-type microwave oven further includes a housing 10. A vertically placed partition 16 is arranged in the housing 10. The cooking cavity 20 is located on the front side of the partition 16. A blower assembly 30 and a magnetron 40 are arranged on the side of the partition 16 away from the cooking cavity 20. The magnetron 40 is arranged opposite to the outlet end of the blower assembly 30, and one end of the waveguide box 90 passes through the partition 16 and is connected to the magnetron 40.

[0051] This setting can physically isolate the magnetron 40 from the cooking cavity 20, preventing the thermal radiation of the cavity from affecting the operating stability of the magnetron 40; the outlet end of the fan assembly 30 faces the magnetron 40 to form directional forced air cooling, and the heat dissipation efficiency is increased by 35% compared with the traditional lateral air supply; the waveguide box 90 vertically penetrates the partition 16 and adopts a short and straight waveguide design, which can effectively reduce the length, further reduce the microwave transmission loss and also reduce the risk of electromagnetic leakage; in addition, as a load-bearing structure, the partition 16 can be pre-integrated with a fan installation part and waveguide positioning holes, and the assembly efficiency of the production line is increased by 40%. As an example of the present invention, the fan assembly 30 includes a bottom case, an upper cover and a fan connected to each other, and its specific structure and assembly relationship are prior art.

[0052] Preferably, there is a gap between the partition 16 and the cooking cavity 20. This setting can form an air isolation layer between the cooking cavity 20 and the electrical cavity, avoiding the heat of the cooking cavity 20 from being directly conducted to the electrical cavity through physical contact; at the same time, the gap between the two provides an installation space for the assembly of the waveguide box 90.

[0053] Preferably, the housing 10 includes a top plate 11, a left side plate 12, a right side plate 13, a rear side plate 14, and a bottom plate 15. The partition 16 is respectively connected to the top plate 11, the left side plate 12, the right side plate 13, and the bottom plate 15. The partition 16 is arranged in parallel with the rear side plate 14. At least one of the left side plate 12, the rear side plate 14, and the bottom plate 15 is provided with an air inlet structure 101. The air inlet structure 101 is located on the side of the partition 16 away from the cooking cavity 20, and a frequency conversion board is arranged between the air inlet structure 101 and the outlet end of the fan assembly 30.

[0054] This setting enables the outdoor air to pass through the frequency conversion board and the magnetron 40 in sequence and dissipate heat from them. The heat dissipation requirements of the frequency conversion board and the magnetron 40 are simultaneously met by one fan assembly 30; the air inlet area is further increased and the air inlet resistance is reduced, thereby improving the heat dissipation efficiency.

[0055] Specifically, the temperature rise sensitivity of the frequency conversion board is strong but the total heat generation is low. First, use fresh cold air to cool it to ensure that the chip junction temperature ≤ 65°C; and the magnetron 40 is a high-power heat source, and the air preheated by the frequency conversion board can still effectively cool the magnetron 40, making the structure more compact. The frequency conversion board can be arranged on the ventilation path between the inlet end of the fan assembly 30 and the first air inlet structure 101, such as on the partition 16 or the housing 10, or can be arranged inside the fan assembly 30.

[0056] As an example of the present invention, feet are provided below the bottom plate 15, and a convex portion 141 is formed by partially protruding the rear side plate 14 toward the side away from the cooking cavity 20. This setting can ensure that there is a gap between the bottom plate 15 and the bottom wall of the embedding space, and there is a gap between the rear side plate 14 and the rear wall of the embedding space, facilitating the entry of external air into the housing 10 through the air intake structure 101.

[0057] Preferably, an air guide cover 80 is provided on the partition plate 16, and an air guide port 161 is provided on the partition plate 16. The inlet end of the air guide cover 80 is disposed opposite to the magnetron 40, and is used for guiding the air flow discharged from the fan assembly 30 to the air guide port 161 and discharging it forward; the drawer-type microwave oven further includes an electronic control board 60, and the electronic control board 60 is fixed on the side of the partition plate 16 away from the cooking cavity 20 and above the air guide cover 80.

[0058] This setting can effectively prevent the flow direction of the hot air flow after heat dissipation from being restricted, so as to ensure that the fan assembly 30 always sucks cold air for the heat dissipation of electrical components; at the same time, when the fan assembly 30 conveys external air, it can suck and disturb the air around the electronic control board 60, so that the heat dissipation of components such as the electronic control board 60, the magnetron 40, and the frequency conversion board can be realized by one fan assembly 30.

[0059] Preferably, the cooking cavity 20 further includes a cavity front plate 22, and an air outlet 221 is provided on the side of the cavity front plate 22 close to the fan assembly 30. The air guide port 161 is located on the side of the partition plate 16 away from the fan assembly 30, and a heat dissipation channel is formed between the air guide port 161 and the air outlet 221.

[0060] This setting can restrict the flow direction of the heat dissipation air flow, making its flow path long outside the cooking cavity 20 and having a good heat dissipation effect; at the same time, it can also dissipate heat from structures such as the drive motor 70 and the lighting assembly, making the structure more reasonable.

[0061] Preferably, the drawer-type microwave oven further includes a wind deflector 17, and the wind deflector 17 is located below the air outlet 221 and extends horizontally forward. By providing the wind deflector 17, the gap between the lower part of the drawer-type microwave oven and the embedding space can be blocked, improving the aesthetics; at the same time, the wind deflector 17 can prevent the air flow from flowing back from the bottom and entering the housing 10 again, ensuring good heat dissipation performance.

[0062] Preferably, the cooking chamber 20 further includes a U-shaped frame 23. An air inlet hole 2321 and an air outlet hole 2322 are provided at one end of the U-shaped frame 23 close to the front plate 22 of the chamber. The air inlet hole 2321 and the air outlet hole 2322 are located on the left and right sides of the cooking chamber 20, and the air outlet hole 2322 is provided on the side of the air inlet hole 2321 away from the air guiding opening 161.

[0063] This setting can allow some air to enter the cooking chamber 20 through the air inlet hole 2321 according to the air pressure difference and be discharged from the air outlet hole 2322 on the other side, thus preventing oil droplets, water vapor, etc. generated during cooking from accumulating in the cooking chamber 20 and not significantly interfering with the circulating heating air flow in the cooking chamber 20. A single blower assembly 30 can simultaneously drive the gas flow outside the cooking chamber 20 to dissipate heat from the components, and at the same time achieve the operation of exhausting oil fumes in the cooking chamber 20 with low energy consumption. Since the circulating hot air assembly 50 forms an air flow circulation at the rear position of the cooking chamber 20, and the air inlet hole 2321 and the air outlet hole 2322 are located at the front side position of the cooking chamber 20, it will not affect the normal heating in the chamber.

[0064] Embodiment 2

[0065] In the existing drawer-type microwave oven, the drawer 200 is driven to open or close by setting a single driving motor 70 on one side. Due to the long stroke, the drawer 200 is prone to skew after being opened, resulting in poor running stability, especially after long-term use. Therefore, in the prior art, rollers 260 are usually provided at the bottom and side of the guide rail for limiting, but there is a problem of relatively large assembly difficulty. Therefore, the applicant proposes the following solution on the basis of Embodiment 1:

[0066] As Figures 6-9 shown, a drawer-type microwave oven includes a heat-insulating chamber assembly and a drawer 200. The heat-insulating chamber assembly includes a cooking chamber 20. The drawer 200 is connected to the heat-insulating chamber assembly in a manner that it can move back and forth in the cooking chamber 20. Rollers 260 are respectively provided on the left and right sides of the drawer 200. The rollers 260 are in rolling contact with the bottom wall 2310 of the cooking chamber 20 and at the same time in rolling contact with the side wall 2320 of the cooking chamber 20. The included angle between the rotation center axis (i.e., the rolling axis) of the roller 260 and the horizontal plane is 30° - 60°.

[0067] It should be noted that the cooking chamber 20 includes a U-shaped frame 23. The U-shaped frame 23 includes a bottom wall 2310 and two side walls 2320 located on the left and right sides of the bottom wall 2310. Correspondingly, rollers 260 are provided on the left and right sides of the drawer 200. In this application, the rollers 260 can contact the side wall 2320, which means that the rollers 260 can contact the adjacent side wall 2320.

[0068] Therefore, based on the existing drawer-type microwave oven, this application only sets two rollers 260, and there is no need to make any changes to the existing cavity structure. Only the setting of the rollers 260 needs to be adjusted so that while the rollers 260 are in rolling contact with the bottom wall 2310, they can also be in rolling contact with the side wall 2320. On the one hand, it ensures the normal pulling and pushing process of the drawer 200, and on the other hand, it enables the cooking cavity 20 itself to provide a limiting effect on the rollers 260 and the drawer 200 in the left-right direction. Compared with the prior art, the rollers 260 with a vertically arranged rolling axis are omitted, and the limiting of the drawer 200 in the left-right direction can still be achieved, avoiding its left-right shaking during the pulling and pushing process.

[0069] Correspondingly, on the basis of being able to solve the problem of the left-right shaking of the drawer 200, compared with the prior art, this application can effectively reduce the number of rollers 260 set, reduce the structural complexity of the moving parts on the drawer 200, and is beneficial to reducing the assembly difficulty of the drawer 200 in the cooking cavity 20.

[0070] The drawer 200 includes a door body 240, a carrier 250, and a slide rail assembly. The front part of the carrier 250 is connected to the door body 240. Rollers 260 are respectively arranged on both sides of the rear part of the carrier 250. The drawer 200 is slidably connected to the cooking cavity 20 through the slide rail assembly, so as to further improve the smoothness of the drawer during the pulling and pushing process.

[0071] An assembly plate 251 is arranged at the rear part of the carrier 250. The rollers 260 are connected to the assembly plate 251 in a rotatable manner. The assembly plate 251 can be integrally stamped and formed along with the processing of the carrier 250 without additional setting and assembly, which is beneficial to simplifying the overall structures of the carrier 250 and the drawer 200.

[0072] Preferably, in the direction of the rotation center axis of the rollers 260, a first conical surface 261 is arranged on one side of the rollers 260, and a second conical surface 262 is arranged on the other side. The first conical surface 261 is in rolling contact with the side wall 2320, and the second conical surface 262 is in rolling contact with the bottom wall 2310. The sum of the cone angles of the first conical surface 261 and the second conical surface 262 is 180°, or in other words, the sum of the oblique angles (half-cone angles) of the first conical surface 261 and the second conical surface 262 is 90°.

[0073] Among them, in order to avoid unnecessary space interference, both the first conical surface 261 and the second conical surface 262 are flat-top conical. Of course, if the space is properly arranged, they can also be conventional conical.

[0074] Preferably, the included angle between the rotation central axis (i.e., the rolling axis) of the roller 260 and the horizontal plane is 30° - 60°, preferably 45°, to prevent the roller 260 from being overly inclined, ensuring the smoothness of the roller 260 during operation and avoiding excessive component forces on itself and the corresponding assembly structures (the carrier 250 and the mounting plate 251).

[0075] On this basis, the present application improves the structure at the connection between the bottom wall 2310 and the side wall 2320, as Figure 9 shown.

[0076] A transition inclined plane 2330 is provided between the bottom wall 2310 and the side wall 2320, and the circumferential surface 263 of the roller 260 is in rolling contact with the transition inclined plane 2330. Correspondingly, the transition inclined plane 2330 is parallel to the rotation central axis of the roller 260. This setting, on the basis of the cooperation between the conical surfaces on both sides of the roller 260 and the bottom wall 2310 and the side wall 2320, further provides a transition inclined plane 2330 to support the circumferential surface 263 of the roller 260. On the one hand, it prevents some structures of the roller 260 from being in an air - supported state, which is beneficial to improving the force distribution of the roller 260. On the other hand, it increases the contact area between the roller 260 and the cooking cavity 20, which is beneficial to ensuring the smooth rolling of the roller 260 and improving the smoothness of the drawer 200 during the pulling and retracting processes.

[0077] For the assembly among the drawer 200, the slide rail assembly, and the cooking cavity 20, the slide rail assembly includes a fixed rail and a movable rail. Both the fixed rail and the movable rail are arranged in the front - rear direction. The fixed rail is connected to the cooking cavity 20, the movable rail is connected to the door body 240 and / or the carrier 250, and the movable rail is connected to the fixed rail and can slide along the fixed rail.

[0078] The fixed rail has a chute structure, and the movable rail can slide within the chute. The slide rail assembly includes a connecting rail, which is arranged between the fixed rail and the movable rail. Among them, the width of the connecting rail does not exceed the width of the chute of the fixed rail, so that the connecting rail is located within the chute, and the movable rail is wrapped outside the connecting rail, and the connecting rail drives the movable rail to slide.

[0079] To further improve the connection stability of the fixed rail, the cooking cavity 20 includes a front cavity plate 22 at the front side. While the main body of the fixed rail is connected to the cooking cavity 20, one end of the fixed rail is connected to the front cavity plate 22, and the other end is connected to the rear cavity plate 21 of the cooking cavity 20, so that the entire fixed rail can be more firmly fixed in the microwave oven, providing a stable support for the movable rail and avoiding unnecessary deviation or loosening of the movable rail during the sliding process.

[0080] In order to improve the smoothness of the drawer during the pulling process, three slide rail assemblies are provided in this application, which are respectively denoted as the first slide rail assembly 210, the second slide rail assembly 220, and the third slide rail assembly 230. Specifically, the drawer-type microwave oven includes a cavity front plate 22 and a housing 10. The cavity front plate 22 is connected to the front sides of the housing 10 and the cooking cavity 20. The first slide rail assembly 210 is provided on the left side of the drawer 200, the second slide rail assembly 220 is provided on the right side of the drawer 200, and the third slide rail assembly 230 is provided on the bottom of the drawer 200. Any one of the slide rail assemblies can extend or retract relative to the cavity front plate 22. Thus, through the setting of three connection surfaces and three slide rails of the drawer, the pulling direction of the drawer is limited to ensure the smooth progress of the drawer pulling action and avoid unnecessary jamming during the pulling process of the drawer.

[0081] A first space, a second space, and a third space are provided between the housing 10 and the cooking cavity 20. The first space and the second space are respectively located on the left and right sides of the cooking cavity 20, and the third space is located at the bottom of the cooking cavity 20. Specifically, a first space is formed between the left side wall of the cooking cavity 20 and the left side plate 12 of the housing 10, a second space 102 is formed between the right side wall of the cooking cavity 20 and the right side plate 13 of the housing 10, and a third space is formed between the bottom wall 2310 of the cooking cavity 20 and the bottom plate 15 of the housing 10.

[0082] The first slide rail assembly 210 is arranged inside the first space, the second slide rail assembly 220 is arranged inside the second space, the third slide rail assembly 230 is arranged inside the third space, and the cavity front plate 22 covers the front sides of the first space, the second space, and the third space.

[0083] A first opening, a second opening, and a third opening are respectively provided on the cavity front plate 22. The first slide rail assembly 210 penetrates through the first opening, the second slide rail assembly 220 penetrates through the second opening, and the third slide rail assembly 230 penetrates through the third opening.

[0084] The first slide rail assembly 210 includes a first fixed rail (not shown), a first movable rail 212, and a first connecting rail 213. The first fixed rail is connected to the cooking cavity 20. The first movable rail 212 is slidably connected to the first fixed rail. The first connecting rail 213 is fixedly connected to the first movable rail 212, preferably by fasteners. Correspondingly, the first opening is provided with an avoidance notch for spatially avoiding the fasteners of the first connecting rail 213 and the first movable rail 212.

[0085] The second slide rail assembly 220 includes a second fixed rail (not shown), a second movable rail 222, and a second connecting rail 223. The second fixed rail is connected to the cooking cavity 20. The second movable rail 222 is slidably connected to the second fixed rail. The second connecting rail 223 is fixedly connected to the second movable rail 222, preferably by a fastener. Correspondingly, a relief notch is provided in the second opening for providing space for avoiding the fastener between the second connecting rail 223 and the second movable rail 222.

[0086] The third slide rail assembly 230 includes a third fixed rail (not shown), a third movable rail 232, and a third connecting rail 233. The third fixed rail is connected to the cooking cavity 20. The third movable rail 232 is slidably connected to the third fixed rail. The third connecting rail 233 is fixedly connected to the third movable rail 232, preferably by a fastener. Correspondingly, a relief notch is provided in the third opening for providing space for avoiding the fastener between the third connecting rail 233 and the third movable rail 232.

[0087] The drawer - type microwave oven further includes a cabinet 100. The cabinet 100 includes a housing 10 and a cooking cavity 20. The drawer - type microwave oven further includes a control box 300 and a connected guide rail assembly and a drive motor 70. Their specific structures and assembly relationships are prior art and will not be elaborated here.

[0088] 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. A drawer-type microwave oven, characterized in that: The drawer-type microwave oven comprises a shell (10) and a heat-insulating cavity assembly, wherein the heat-insulating cavity assembly comprises a cooking cavity (20) and a heat-insulating frame assembly which are sequentially arranged from the inside to the outside, and a heat-insulating member is arranged between the cooking cavity (20) and the heat-insulating frame assembly. The drawer-type microwave oven further comprises a circulating hot air assembly (50) for circulating heating the cooking cavity (20); a vertically placed partition (16) is arranged in the shell (10), the cooking cavity (20) is located in front of the partition (16), a fan assembly (30) and a magnetron (40) are arranged on a side of the partition (16) away from the cooking cavity (20), the magnetron (40) is arranged directly opposite to the outlet end of the fan assembly (30), and a frequency conversion board is arranged in the fan assembly (30).

2. The drawer-type microwave oven according to claim 1, characterized in that: The cooking cavity (20) comprises a cavity rear plate (21), the upper portion of which is tilted forwards, and the drawer-type microwave oven further comprises a waveguide box (90), the waveguide box (90) being connected to the magnetron (40) and used for inputting microwave energy generated by the magnetron (40) from the upper portion of the cavity rear plate (21) tilted downwards to heat food.

3. The drawer-type microwave oven according to claim 1, characterized in that: The circulating hot air component (50) is located at the top of the cooking cavity (20) and is used to heat the gas sucked in from the top and then circulate it into the cooking cavity (20) from the left and right sides.

4. The drawer-type microwave oven according to claim 1, characterized in that: The shell (10) comprises a top plate (11), a left side plate (12), a right side plate (13), a rear side plate (14), and a bottom plate (15); the partition plate (16) is respectively connected to the top plate (11), the left side plate (12), the right side plate (13), and the bottom plate (15); the partition plate (16) is arranged in parallel with the rear side plate (14); at least two of the left side plate (12), the rear side plate (14), and the bottom plate (15) are provided with an air inlet structure (101); and the air inlet structure (101) is located on a side of the partition plate (16) away from the cooking cavity (20).

5. The drawer-type microwave oven according to claim 4, characterized in that: Support feet are arranged below the bottom plate (15), and a portion of the rear side plate (14) protrudes toward a side away from the cooking cavity (20) to form a raised portion (141).

6. The drawer-type microwave oven according to claim 1, characterized in that: An air guide cover (80) is arranged on the partition (16), and an air guide port (161) is arranged on the partition (16). The inlet end of the air guide cover (80) is arranged directly opposite to the magnetron (40) and is used to discharge the outlet air flow of the fan assembly (30) through the air guide port (161). The drawer-type microwave oven also includes an electric control board (60), which is fixed on a side of the partition (16) away from the cooking cavity (20) and is located above the air guide cover (80).

7. The drawer-type microwave oven according to claim 6, characterized in that: The cooking cavity (20) comprises a cavity front plate (22), an air outlet (221) being arranged on a side of the cavity front plate (22) close to the fan assembly (30), the air guide port (161) being located on a side of the partition plate (16) away from the fan assembly (30), and a heat dissipation channel being formed between the air guide port (161) and the air outlet (221).

8. The drawer-type microwave oven according to claim 7, characterized in that: The cooking cavity (20) further comprises a U-shaped frame (23), wherein the U-shaped frame (23) is provided with an air inlet hole (2321) and an air outlet hole (2322) at one end close to the cavity front plate (22), wherein the air inlet hole (2321) and the air outlet hole (2322) are located on the left and right sides of the cooking cavity (20), and the air outlet hole (2322) is provided on a side of the air inlet hole (2321) away from the air guide port (161).

9. The drawer-type microwave oven according to claim 1, characterized in that: The drawer-type microwave oven further comprises a drawer (200), wherein the drawer (200) is connected to the heat-insulating cavity assembly in a manner capable of moving forward and backward in the cooking cavity (20), and rollers (260) are respectively arranged on the left and right sides of the drawer (200), wherein the rollers (260) are in rolling contact with the bottom wall (2310) of the cooking cavity (20) and are simultaneously in rolling contact with the side walls (2320) of the cooking cavity (20); and the angle between the central axis of rotation of the roller (260) and the horizontal plane is 30°-60°.

10. The drawer-type microwave oven according to claim 9, characterized in that: In the direction of the rotation center axis of the roller (260), a first conical surface (261) is provided on one side of the roller (260), and a second conical surface (262) is provided on the other side, the first conical surface (261) is in rolling contact with the side wall (2320), the second conical surface (462) is in rolling contact with the bottom wall (2310), a transition inclined surface (2330) is provided between the bottom wall (2310) and the side wall (2320), the wheel circumference (263) of the roller (260) is in rolling contact with the transition inclined surface (2330), and the transition inclined surface (2330) is parallel to the rotation center axis of the roller (260).

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