Built-in microwave oven

Abstract

The present invention relates to an embedded microwave oven, comprising a cabinet, a door, a front plate, a first partition plate and a heat dissipation fan. Under the action of the heat dissipation fan, outside air enters from the front air inlet into the air inlet mesh and enters into the interval area between the shell wall of the shell and the cavity wall of the cooking cavity, and after air cooling the electronic components (such as a variable frequency power supply and a magnetron), the hot air is discharged outward from the front air outlet and the front air outlet. The first partition plate can prevent the cold air entering the front air inlet from mixing with the hot air discharged from the front air outlet, and prevent the hot air discharged from the front air outlet from directly entering the front air inlet and then entering the cabinet, playing a good buffering role, that is, after the hot air is discharged from the front air outlet, it first dissipates heat with the outside air, and then enters the cabinet through the front air inlet; in addition, the hot air discharged from the front air outlet can be reflected to the upper front side of the cabinet through the first partition plate, so that it is not easily sucked into the front air inlet.

Description

Technical Field

[0001] The invention relates to a microwave oven, in particular to a built-in microwave oven. Background Art

[0002] The heat generated by the microwave oven itself mainly comes from the magnetron and power supply. It is necessary to focus on the heat dissipation of these two components, otherwise it will easily affect the performance of the microwave oven and reduce the service life of the microwave oven. Microwave ovens are divided into countertop microwave ovens and embedded microwave ovens. Among them, the embedded microwave oven is installed in the cabinet, which does not occupy the countertop space. Because the inside of the cabinet is not connected to the outside world on all sides like the countertop, it only has the opening in the front of the cabinet connected to the outside world, or another hole is opened inside the cabinet to connect to the outside world, which brings new challenges to the heat dissipation of the embedded microwave oven. Summary of the invention

[0003] Based on this, it is necessary to overcome the defects of the prior art and provide an embedded microwave oven which can improve the heat dissipation effect.

[0004] The technical scheme is as follows: an embedded microwave oven comprises: a box body and a door body, the box body comprises an outer shell and a cooking cavity arranged in the outer shell, the outer shell and the cooking cavity are both provided with an opening corresponding to the door body, the door body can be opened and covered on the opening, the outer shell comprises a bottom cover plate, a first side cover plate and a rear cover plate, the first side cover plate and the rear cover plate are both connected to the bottom cover plate, at least one of the bottom cover plate, the first side cover plate and the rear cover plate is provided with an air inlet mesh; a front plate, the front plate is arranged around the circumference of the opening of the cooking cavity, the bottom of the front plate is provided with a front side air outlet hole penetrating the front plate, the shell wall of the outer shell is connected to the A spacing area is formed between the cavity walls of the cooking cavity, the front air outlet is connected to the spacing area, and when the door is closed, the door body and the front plate fit together to seal the opening; a first partition, the first partition is connected to the bottom edge of the front plate or to the side of the bottom cover plate close to the opening, the first partition is located below the door body and forms a front air outlet with the bottom end of the door body, downwardly protruding supporting feet are provided on the bottom side surface of the bottom cover plate, and the first partition and the supporting surface on which the supporting feet are placed form a front air inlet; and a cooling fan, the cooling fan is arranged in the spacing area between the shell wall of the outer shell and the cavity wall of the cooking cavity.

[0005] When the above-mentioned embedded microwave oven is working, under the action of the heat dissipation fan, the outside air enters the air inlet mesh from the front air inlet and enters the interval area between the shell wall of the shell and the cavity wall of the cooking cavity, and after air cooling the electronic components (such as the variable frequency power supply and the magnetron), the hot air is discharged outward from the front air outlet and the front air outlet. The first partition can prevent the cold air entering the front air inlet and the hot air discharged from the front air outlet from mixing with each other, and prevent the hot air discharged from the front air outlet from directly entering the front air inlet and then entering the box, playing a good buffering role, that is, the hot air is first dissipated with the outside air after being discharged from the front air outlet, and then enters the box through the front air inlet; in addition, the hot air discharged from the front air outlet can be reflected to the upper front side of the box through the first partition, so that it is not easily sucked into the front air inlet.

[0006] In one of the embodiments, a bottom edge recess is provided on the bottom portion of the panel surface of the door body facing the front panel, and the bottom edge recess is arranged opposite to the front air outlet.

[0007] In one of the embodiments, side recesses are provided on two side portions of the panel surface of the door body facing the front panel, and the two side recesses are respectively connected to two ends of the bottom recess.

[0008] In one of the embodiments, the outer shell also includes a top cover plate arranged on the top of the cooking cavity, and the top cover plate is respectively connected to the first side cover plate and the rear cover plate; a hot air component is provided on the top wall of the cooking cavity, and the top cover plate covers the hot air component, and at least a part of the air discharged by the cooling fan flows through the hot air component.

[0009] In one embodiment, the embedded microwave oven also includes a variable frequency power supply and a magnetron, the top wall of the cooking cavity is provided with a transverse border on the side away from the door body, the transverse border is in contact with the top cover plate, and the cooling fan, the variable frequency power supply and the magnetron are all arranged in the spacing area between the rear wall of the cooking cavity and the rear cover plate.

[0010] In one embodiment, the cooling fan includes a first fan for cooling the variable frequency power supply and a second fan for cooling the magnetron; the lateral surrounding edge includes a main body surrounding edge and an arcuate surrounding edge connected to one end of the main body surrounding edge, and the arcuate surrounding edge is used to guide wind to the spacing area between the side wall of the cooking cavity and the first side cover plate; a guide edge is also provided on the top wall of the cooking cavity, and a ventilation gap is provided between the guide edge and the other end of the main body surrounding edge, and the guide edge extends toward the middle part of the cooking cavity.

[0011] In one embodiment, the air inlet mesh includes a side air inlet mesh and a bottom air inlet mesh; the first side cover plate is close to the rear cover plate and one of the corners of the bottom cover plate and the side air inlet mesh is provided, and the bottom cover plate is close to the first side cover plate and one of the corners of the rear cover plate and the bottom air inlet mesh is provided;

[0012] The surface where the air inlet of the first fan is located is inclined relative to the bottom cover plate, the surface where the air inlet of the first fan is located faces the side air inlet mesh and the bottom air inlet mesh, the surface where the air outlet of the first fan is located faces the variable frequency power supply, the surface where the air inlet of the second fan is located faces the bottom air inlet mesh or the side air inlet mesh, and the surface where the air outlet of the second fan is located faces the magnetron.

[0013] In one of the embodiments, a first rear air inlet mesh hole is provided at a corner portion of the rear cover plate close to the first side cover plate and the bottom cover plate.

[0014] In one embodiment, the first fan is disposed above the second fan, and an angle A is formed between a central axis of the first fan and a central axis of the second fan, and A is less than 90°.

[0015] In one of the embodiments, the second fan is a vortex fan, and air inlets are provided on the upper and lower surfaces of the vortex fan. The lower surface of the vortex fan is connected to a first air guide cover, and the top plate of the first air guide cover is provided with a first vent which is connected to the air inlet on the lower surface of the vortex fan. The motor of the vortex fan is arranged in the first air guide cover, and the first air guide cover is arranged in a part of the bottom air inlet mesh. The projection of the first fan on the bottom cover along the vertical direction is located in another part of the bottom air inlet mesh.

[0016] In one embodiment, a ventilation gap is provided between the first fan and the second fan.

[0017] In one embodiment, the casing of the variable frequency power supply is provided with a first transverse ventilation duct, the air outlet of the first fan is connected to one of the ports of the first transverse ventilation duct, the outer wall of the other port of the first transverse ventilation duct is connected with a vertical partition and a transverse partition, the vertical partition and the transverse partition are arranged on the periphery of the magnetron, the vertical partition is provided with a second ventilation port, and the air outlet of the second fan is connected to the second ventilation port.

[0018] In one of the embodiments, the power connection connector of the magnetron is arranged adjacent to the transverse partition; the transverse partition is provided with a third vent corresponding to the power connection connector of the magnetron, and the third vent is located on one side of the transverse partition close to the vertical partition.

[0019] In one embodiment, the embedded microwave oven also includes a second air guide cover, the radiator shell of the magnetron is provided with a second transverse ventilation channel, the rear wall of the cooking cavity is provided with a second rear air inlet mesh, the second air guide cover is covered by the second rear air inlet mesh, and the second vent, the second transverse ventilation channel, and the air inlet of the second air guide cover are connected in sequence.

[0020] In one of the embodiments, a heat-conducting edge is provided at the air inlet of the second air guide cover, and the heat-conducting edge is in contact with the magnetron.

[0021] In one of the embodiments, the embedded microwave oven further comprises a container connected to the door body for placing cooking objects, and the door body is connected to the side wall of the cooking cavity via a slide rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of a state where a built-in microwave oven according to an embodiment of the present invention is placed inside a cabinet;

[0023] Figure 2 This is a perspective view of a built-in microwave oven according to an embodiment of the present invention;

[0024] Figure 3 for Figure 2 A magnified schematic diagram at M;

[0025] Figure 4 It is a structural schematic diagram of one viewing angle of the embedded microwave oven according to one embodiment of the present invention after the first side cover plate is removed;

[0026] Figure 5 for Figure 4 Enlarged schematic diagram at N;

[0027] Figure 6 It is a schematic side view of the structure of a built-in microwave oven according to an embodiment of the present invention;

[0028] Figure 7 A schematic diagram of the internal structure of an embedded microwave oven according to an embodiment of the present invention;

[0029] Figure 8 A schematic structural diagram of an embedded microwave oven according to an embodiment of the present invention with the outer shell removed from one viewing angle;

[0030] Fig. 9It is a schematic structural diagram of another viewing angle of the embedded microwave oven according to one embodiment of the present invention after the outer shell is removed;

[0031] Fig.10 It is a structural schematic diagram of the embedded microwave oven according to one embodiment of the present invention without the rear cover plate;

[0032] Fig.11 It is a structural schematic diagram of an embedded microwave oven according to an embodiment of the present invention with the rear cover plate and the first side cover plate removed from one viewing angle;

[0033] Fig.12 This is a schematic structural diagram from another perspective of the embedded microwave oven according to an embodiment of the present invention without the rear cover plate and the first side cover plate.

[0034] Reference numerals:

[0035] 10. Box body; 11. Shell; 111. Bottom cover; 1111. Bottom air inlet mesh; 1112. Support foot; 112. First side cover; 1121. Side air inlet mesh; 113. Rear cover; 1131. First rear air inlet mesh; 114. Top cover; 115. Second side cover; 12. Cooking cavity; 121. Second rear air inlet mesh; 13. Front air outlet; 14. Front air inlet; 20. Door; 21. Bottom notch; 211. Oblique wall; 22. Side notch; 30. Front plate; 31. Front air outlet; 40. First partition; 51. First fan; 511. Central axis; 52. Second fan; 521. Central axis; 522. Fan motor machine; 53, ventilation gap; 60, variable frequency power supply; 61, housing; 70, magnetron; 71, power connection joint; 72, radiator housing; 80, hot air assembly; 81, heating pipe; 82, heat stirring fan; 83, hot air motor; 91, control box; 92, horizontal edge; 921, main body edge; 922, arc edge; 93, guide edge; 94, ventilation interval; 95, barrier; 96, first air guide cover; 961, baffle; 962, mounting plate; 97, vertical partition; 971, second vent; 98, horizontal partition; 981, third vent; 99, second air guide cover; 991, heat conduction edge; 200, cabinet; 210, support surface. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0037] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In the description of the present invention, it is to be understood that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be intermediate elements at the same time. On the contrary, when an element is said to be "directly" connected to another element, there are no intermediate elements.

[0039] In one embodiment, see Figures 1 to 7 . An embedded microwave oven comprises a housing 10, a door body 20, a front plate 30, a first partition plate 40 and a cooling fan. The housing 10 comprises an outer shell 11 and a cooking cavity 12 arranged in the outer shell 11. The outer shell 11 and the cooking cavity 12 are both provided with an opening corresponding to the door body 20, and the door body 20 can be opened and covered on the opening. The outer shell 11 comprises a bottom cover plate 111, a first side cover plate 112 and a rear cover plate 113. The first side cover plate 112 and the rear cover plate 113 are both connected to the bottom cover plate 111, and at least one of the bottom cover plate 111, the first side cover plate 112 and the rear cover plate 113 is provided with an air inlet mesh.

[0040] The front plate 30 is arranged around the circumference of the opening of the cooking cavity 12, and a front air outlet 31 penetrating the front plate 30 is arranged at the bottom of the front plate 30. A spacing area is formed between the shell wall of the housing 11 and the cavity wall of the cooking cavity 12, and the front air outlet 31 is connected to the spacing area. When the door is closed, the door body 20 and the front plate 30 are in contact with each other to seal the opening. Specifically, a spacing area is formed between the first side cover plate 112 and the shell wall of the cooking cavity 12 and is connected to the front air outlet 31.

[0041] The first partition plate 40 is connected to the bottom edge of the front plate 30 or to the side edge of the bottom cover plate 111 close to the opening. The first partition plate 40 is located below the door body 20 and forms a front air outlet 13 with the bottom end of the door body 20. The bottom side surface of the bottom cover plate 111 is provided with a support foot 1112 protruding downward. The first partition plate 40 and the support surface 210 (that is, the bottom wall of the cabinet 200) on which the support foot 1112 is placed form a front air inlet 14. The heat dissipation fan is arranged in the interval area between the shell wall of the shell 11 and the cavity wall of the cooking cavity 12.

[0042] When the above-mentioned embedded microwave oven is working, under the action of the cooling fan, the outside air enters the air inlet mesh from the front air inlet 14 and enters the spacing area between the shell wall of the outer shell 11 and the cavity wall of the cooking cavity 12, and after air cooling the electronic components (such as the variable frequency power supply 60 and the magnetron 70), the hot air is discharged outward from the front air outlet 31 and the front air outlet 13 in turn. The first partition 40 can prevent the cold air entering from the front air inlet 14 and the hot air discharged from the front air outlet 13 from mixing with each other, and prevent the hot air discharged from the front air outlet 13 from directly entering the front air inlet 14 and then entering the box body 10, thereby playing a good buffering role, that is, after the hot air is discharged from the front air outlet 13, it first dissipates heat with the outside air, and then enters the box body 10 through the front air inlet 14; in addition, the hot air discharged from the front air outlet 13 can be reflected to the upper front side of the box body 10 through the first partition 40, so that it is not easily inhaled by the front air inlet 14.

[0043] For further information, see Figures 4 to 7 , a bottom edge notch 21 is provided on the bottom portion of the panel surface of the door body 20 facing the front panel 30, and the bottom edge notch 21 is arranged opposite to the front air outlet 31. In this way, the hot air discharged outward from the front air outlet 31 can be buffered at the bottom edge notch 21, and then discharged into the outside air of the box body 10, that is, the air outlet area at the final end can be increased, and the air outlet speed can be improved. Specifically, in order to achieve a better buffering and diversion effect of the bottom edge notch 21, the mouth wall of the bottom edge notch 21 is an inclined wall 211 arranged obliquely relative to the air outlet direction of the front air outlet 31.

[0044] Specifically, there may be a plurality of front air outlet holes 31 , and the front air outlet holes 31 are located at the bottom of the front plate 30 .

[0045] For further information, see Figures 4 to 7 , the two side portions of the door body 20 facing the front plate 30 are provided with side notches 22, and the two side notches 22 are respectively connected to the two ends of the bottom notch 21. In this way, the hot air discharged outward from the front air outlet 31 can be buffered at the bottom notch 21, and further buffered at the side notches 22, and then discharged into the outside air of the box body 10, that is, the air outlet area at the final end can be increased, and the air outlet speed can be improved. In addition, the interval between the bottom wall of the side notch 22 and the front plate 30 is not only used to form a buffer channel for hot air, but also can be used as a handle for opening the door of the embedded microwave oven.

[0046] For further information, see Figures 4 to 7The housing 11 further comprises a top cover plate 114 disposed on the top of the cooking cavity 12, and the top cover plate 114 is connected to the first side cover plate 112 and the rear cover plate 113 respectively. A hot air assembly 80 is disposed on the top wall of the cooking cavity 12, and the top cover plate 114 covers the hot air assembly 80. At least a portion of the air discharged by the heat dissipation fan flows through the hot air assembly 80. In this way, the cold air from the outside of the box 10 sucked by the heat dissipation fan flows through some electronic components (the variable frequency power supply 60 and the magnetron 70), then flows through the hot air assembly 80 on the top of the cooking cavity 12, then flows into the interval area between the side wall of the cooking cavity 12 and the first side cover plate 112, and finally is discharged into the external environment of the box 10 through the front side air outlet 31 of the front plate 30 and the front side air outlet 13. In this way, the cold air entering the box 10 not only dissipates heat for the variable frequency power supply 60 and the magnetron 70, but also dissipates heat for the hot air motor 83, which can prevent heat from accumulating on the top of the box 10 and affecting the control box 91 located next to the hot air assembly 80. Specifically, the control box 91 is arranged on a side of the top cover plate 114 close to the door body 20 to facilitate the operation of the control box 91. Of course, the control box 91 can also be arranged at other positions on the top cover plate 114.

[0047] Please note that Figure 7 and Figure 8 The hot air assembly 80 includes a heating pipe 81 , a hot air stirring fan 82 with metal fan blades, and a hot air motor 83 for driving the hot air stirring fan 82 .

[0048] For further information, see Figures 10 to 12 The embedded microwave oven further includes a variable frequency power supply 60 and a magnetron 70. A transverse border 92 is provided on the top wall of the cooking cavity 12 away from the door body 20, and the transverse border 92 is in contact with the top cover plate 114. The cooling fan, the variable frequency power supply 60 and the magnetron 70 are all arranged in the interval area between the rear wall of the cooking cavity 12 and the rear cover plate 113. In this way, the transverse border 92 isolates the hot air component 80 from the variable frequency power supply 60 and the magnetron 70, and can prevent the heat generated by the hot air component 80 from jumping to the variable frequency power supply 60 and the magnetron 70 behind the transverse border 92, thereby affecting the normal operation of the variable frequency power supply 60 and the magnetron 70.

[0049] For further information, see Fig.11 and Fig.12The heat dissipation fan includes a first fan 51 for dissipating heat for the variable frequency power supply 60 and a second fan 52 for dissipating heat for the magnetron 70. The transverse surrounding edge 92 includes a main body surrounding edge 921 and an arc-shaped surrounding edge 922 connected to one end of the main body surrounding edge 921. The arc-shaped surrounding edge 922 is used to guide the wind to the interval area between the side wall of the cooking cavity 12 and the first side cover plate 112. A guide edge 93 is also provided on the top wall of the cooking cavity 12, and a ventilation interval 94 is provided between the guide edge 93 and the other end of the main body surrounding edge 921. The guide edge 93 extends toward the middle part of the cooking cavity 12. In this way, the wind blown by the first fan 51 dissipates heat for the variable frequency power supply 60, and the wind blown by the second fan 52 dissipates heat for the magnetron 70, which has a good heat dissipation effect. In addition, part of the wind exhausted by the cooling fan flows along the horizontal edge 92 and enters the spacing area between the side wall of the cooking cavity 12 and the first side cover plate 112, and then is discharged outward from the front air outlet 31 and the front air outlet 13 of the front plate 30; another part of the wind exhausted by the cooling fan enters the top of the cooking cavity 12 from the ventilation gap 94, then flows through the hot air assembly 80 and enters the spacing area between the side wall of the cooking cavity 12 and the first side cover plate 112, and is also discharged outward from the front air outlet 31 and the front air outlet 13 of the front plate 30 in turn.

[0050] For further information, see Figures 9 to 12The air inlet mesh includes a side air inlet mesh 1121 and a bottom air inlet mesh 1111. The first side cover 112 is provided with the side air inlet mesh 1121 at one of the corners close to the rear cover 113 and the bottom cover 111, and the bottom cover 111 is provided with the bottom air inlet mesh 1111 at one of the corners close to the first side cover 112 and the rear cover 113. The surface where the air inlet of the first fan 51 is located is tilted relative to the bottom cover 111, the surface where the air inlet of the first fan 51 is located faces the side air inlet mesh 1121 and the bottom air inlet mesh 1111, the surface where the air outlet of the first fan 51 is located faces the variable frequency power supply 60, the surface where the air inlet of the second fan 52 is located faces the bottom air inlet mesh 1111 or the side air inlet mesh 1121, and the surface where the air outlet of the second fan 52 is located faces the magnetron 70. In this way, on the one hand, the first fan 51 draws air from the outside of the box 10 through the side air inlet mesh 1121 and the bottom air inlet mesh 1111, and blows it onto the variable frequency power supply 60 to dissipate heat for the variable frequency power supply 60. The large amount of air entering has a good heat dissipation effect on the variable frequency power supply 60. The second fan 52 draws air from the outside of the box 10 through the bottom air inlet mesh 1111 or the side air inlet mesh 1121, and blows it onto the magnetron 70 to dissipate heat, thereby achieving a good heat dissipation effect for the magnetron 70. On the other hand, since the first fan 51 is tilted relative to the bottom cover plate 111 with the surface where its air inlet is located, the horizontal space occupied by the first fan 51 can be reduced to a certain extent relative to the horizontal setting, thereby increasing the volume of the cooking cavity 12 while reducing the heat dissipation effect.

[0051] Specifically, in order to prevent the hot air entering the spacing area between the side wall of the cooking cavity 12 and the first side cover plate 112 from being sucked into the cooling fan, a barrier 95 is provided in the spacing area between the side wall of the cooking cavity 12 and the first side cover plate 112 and close to the rear wall of the cooking cavity 12.

[0052] For further information, see Figures 9 to 12 The rear cover plate 113 is provided with a first rear air inlet mesh 1131 at one of the corners close to the first side cover plate 112 and the bottom cover plate 111. Thus, when the first fan 51 and the second fan 52 are working, the outside air of the box body 10 can also enter the box body 10 through the first rear air inlet mesh 1131, so as to increase the air volume and ensure a better heat dissipation effect.

[0053] For further information, see Figures 9 to 12, the first fan 51 is arranged above the second fan 52, and the angle A between the central axis 511 of the first fan 51 and the central axis 521 of the second fan 52 is less than 90°. It should be explained that the central axis 511 of the first fan 51 refers to the axis line of the surface perpendicular to the air inlet of the first fan 51, and the central axis 521 of the second fan 52 refers to the axis line of the surface perpendicular to the air inlet of the second fan 52. Specifically, the angle A between the central axis 511 of the first fan 51 and the central axis 521 of the second fan 52 is 30° to 40°, and preferably, A is 36°.

[0054] Furthermore, the second fan 52 is a vortex fan, and both the upper and lower surfaces of the vortex fan are provided with air inlets. The lower surface of the vortex fan is connected to a first air guide cover 96, and the top plate of the first air guide cover 96 is provided with a first vent connected to the air inlet on the lower surface of the vortex fan. The motor of the vortex fan is arranged in the first air guide cover 96, and the first air guide cover 96 is arranged to cover a part of the bottom air inlet mesh 1111. The projection of the first fan 51 on the bottom cover plate 111 along the vertical direction is located at another part of the bottom air inlet mesh 1111. In this way, the first air guide cover 96 can divide the air entering into the outer casing 11 from the bottom air inlet mesh 1111 into two independent and isolated winds, one of which is sucked in by the air inlet of the first fan 51, and the other is sucked in by the air inlet of the second fan 52. The two wind flows will not be confused and partially offset, thereby improving the utilization rate of the cold air and ensuring the heat dissipation effect; in addition, the fan motor 522 of the vortex fan is arranged in the first air guide cover 96, and the wind flow entering the first air guide cover 96 has a heat dissipation effect on the fan motor 522, thereby improving the service life of the fan motor 522.

[0055] Specifically, see Figures 9 to 12 The first air guide cover 96 includes two baffles 961 arranged at intervals and a mounting plate 962 connecting the two baffles 961. The first vent is formed on the mounting plate 962. The baffles 961 are respectively connected to the rear wall of the cooking cavity 12 and the rear cover 113. The motor of the second fan 52 is arranged between the two baffles 961. The area between the two baffles 961 is opposite to the first rear air inlet mesh 1131 of the rear cover 113, and the outside air can enter between the two baffles 961 through the first rear air inlet mesh 1131. In addition, the mounting plate 962 is opposite to the bottom air inlet mesh 1111 of the bottom cover 111, and the outside air can also enter into the first air guide cover 96 through the bottom air inlet mesh 1111.

[0056] For further information, see Figures 9 to 12, a ventilation gap 53 is provided between the first fan 51 and the second fan 52. In this way, a part of the wind enters the first air guide cover 96 through the bottom air inlet mesh 1111 and enters the air inlet on the lower surface of the second fan 52, and another part of the wind enters the housing 11 through the bottom air inlet mesh 1111 and the side air inlet mesh 1121, and enters the air inlet on the upper surface of the second fan 52 from the ventilation gap 53 between the first fan 51 and the second fan 52, thereby increasing the cold air intake of the second fan 52 and achieving a better heat dissipation effect.

[0057] For further information, see Figures 9 to 12 The housing 61 of the variable frequency power supply 60 is provided with a first transverse ventilation channel, the air outlet of the first fan 51 is connected to one of the ports of the first transverse ventilation channel, and the outer wall of the other port of the first transverse ventilation channel is connected with a vertical partition 97 and a transverse partition 98. The vertical partition 97 and the transverse partition 98 are arranged on the periphery of the magnetron 70, and the vertical partition 97 is provided with a second ventilation port 971, and the air outlet of the second fan 52 is connected to the second ventilation port 971. In this way, on the one hand, the cold air sent out from the air outlet of the first fan 51 enters the first transverse ventilation channel to achieve better heat dissipation of the variable frequency power supply 60; on the other hand, under the action of the vertical partition 97 and the transverse partition 98, the two wind flows will not be chaotic and partially offset, thereby improving the utilization rate of the cold air and ensuring the heat dissipation effect.

[0058] Furthermore, the transverse partition 98 is also connected to the rear wall of the cooking cavity 12 and the rear cover 113. Similarly, the vertical partition 97 is also connected to the rear wall of the cooking cavity 12 and the rear cover 113.

[0059] For further information, see Figures 9 to 12 , the power connection connector 71 of the magnetron 70 is arranged adjacent to the transverse partition 98. The transverse partition 98 is provided with a third vent 981 corresponding to the power connection connector of the magnetron 70, and the third vent 981 is located on the transverse partition 98 on a side close to the vertical partition 97. In this way, after the cold air of the first fan 51 flows out through the first transverse ventilation channel, a part of the air flows into the space area where the magnetron 70 is located through the third vent 981, and when it flows into the area where the magnetron 70 is located from top to bottom, it fully exchanges heat with the magnetron 70, which can better reduce the temperature of the magnetron 70. In addition, it can avoid the generation of whirlwind in the area where the magnetron 70 is located.

[0060] For further information, see Figures 9 to 12The embedded microwave oven further includes a second air guide cover 99. The heat sink housing 72 of the magnetron 70 is provided with a second transverse ventilation channel, the rear wall of the cooking cavity 12 is provided with a second rear air inlet mesh hole 121, the second air guide cover 99 is covered by the second rear air inlet mesh hole 121, and the second vent 971, the second transverse ventilation channel, and the air inlet of the second air guide cover 99 are connected in sequence. In this way, the cold air of the second fan 52 enters the second air guide cover 99 through the second vent 971 and the second transverse ventilation channel, and then enters the interior of the cooking cavity 12 through the second rear air inlet mesh hole 121.

[0061] For further information, see Figures 9 to 12 The air inlet of the second air guide cover 99 is provided with a heat conducting edge 991, and the heat conducting edge 991 is in contact with the magnetron 70. Specifically, the heat conducting edge 991 is in contact with the heat sink housing 72 of the magnetron 70, and the heat on the heat sink housing 72 of the magnetron 70 is transferred to the second air guide cover 99 by the heat conduction principle, thereby improving the heat dissipation effect of the magnetron 70.

[0062] In a specific embodiment, see Figures 9 to 12 The power connection connector 71 of the magnetron 70 is arranged adjacent to the transverse partition 98, and the transverse partition 98 is provided with a third vent 981 corresponding to the power connection connector of the magnetron 70, and the third vent 981 is located on the transverse partition 98 on a side close to the vertical partition 97. The embedded microwave oven further includes a second air guide cover 99, the heat sink housing 72 of the magnetron 70 is provided with a second transverse ventilation channel, the rear wall of the cooking cavity 12 is provided with a second rear air inlet mesh 121, the second air guide cover 99 is provided on the second rear air inlet mesh 121, and the second vent 971, the second transverse ventilation channel, and the air inlet of the second air guide cover 99 are sequentially connected. In this way, when the second air guide 99 contains only the wind blown by the second fan 52, it is easy to generate vortex wind in the second air guide 99. After the third vent 981 is provided on the transverse partition 98, the wind blown by the first fan 51 can enter the area where the magnetron 70 is located from top to bottom through the third vent 981, and enter the second air guide 99, thereby helping to avoid the generation of vortex wind and having a better heat dissipation effect on the magnetron 70.

[0063] Furthermore, the drawer-type microwave oven further comprises a container connected to the door body 20 for placing cooking objects, and the door body 20 is connected to the side wall of the cooking cavity 12 via a slide rail.

[0064] For further information, see Figures 9 to 12The housing 11 further includes a second side cover plate 115. The second side cover plate 115 is arranged opposite to the first side cover plate 112, and the second side cover plate 115 is respectively connected to the rear cover plate 113 and the bottom cover plate 111. The three sides of the top cover plate 114 are respectively connected to the first side cover plate 112, the rear cover plate 113 and the second side cover plate 115.

[0065] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A built-in microwave oven, characterized in that: include: A box body and a door body, the box body comprises an outer shell and a cooking cavity arranged in the outer shell, the outer shell and the cooking cavity are both provided with an opening corresponding to the door body, the door body can be opened and covered on the opening, the outer shell comprises a bottom cover plate, a first side cover plate, a rear cover plate and a top cover plate arranged on the top of the cooking cavity, the top cover plate is respectively connected with the first side cover plate and the rear cover plate, a hot air component is arranged on the top wall of the cooking cavity, the top cover plate covers the hot air component, the first side cover plate and the rear cover plate are both connected with the bottom cover plate, and an air inlet mesh is arranged on at least one of the bottom cover plate, the first side cover plate and the rear cover plate; A front plate, the front plate is arranged around the circumference of the mouth of the cooking cavity, the bottom of the front plate is provided with a front air outlet hole penetrating the front plate, a spacer area is formed between the shell wall of the outer shell and the cavity wall of the cooking cavity, the front air outlet hole and the spacer area are connected, and when the door is closed, the door body and the front plate are in contact with each other to seal the mouth; A first partition, the first partition is connected to the bottom edge of the front plate or to the side edge of the bottom cover plate close to the opening, the first partition is located below the door body and forms a front air outlet with the bottom end of the door body, the front air outlet is connected to the front air outlet hole, a support foot protruding downward is provided on the bottom side surface of the bottom cover plate, and the first partition and the support surface on which the support foot is placed form a front air inlet; A heat dissipation fan, the heat dissipation fan being arranged in a spacing area between a shell wall of the outer shell and a cavity wall of the cooking cavity, and at least a part of the air discharged by the heat dissipation fan flows through the hot air assembly; A variable frequency power supply and a magnetron, a top wall of the cooking cavity is provided with a transverse edge on a side away from the door body, the transverse edge is in contact with the top cover plate, and the cooling fan, the variable frequency power supply and the magnetron are all arranged in the interval area between the rear wall of the cooking cavity and the rear cover plate; Wherein, the cooling fan includes a first fan for dissipating heat for the variable frequency power supply and a second fan for dissipating heat for the magnetron; the lateral surrounding edge includes a main body surrounding edge and an arc-shaped surrounding edge connected to one end of the main body surrounding edge, and the arc-shaped surrounding edge is used to guide wind to the interval area between the side wall of the cooking cavity and the first side cover plate; a guide edge is also provided on the top wall of the cooking cavity, and a ventilation interval is provided between the guide edge and the other end of the main body surrounding edge, and the guide edge extends toward the middle part of the cooking cavity; a bottom edge recess is provided on the bottom part of the plate surface of the door body facing the front plate, and the bottom edge recess is arranged opposite to the front air outlet.

2. The built-in microwave oven according to claim 1, characterized in that: Side notches are arranged on two side portions of the plate surface of the door body facing the front plate, and the two side notches are respectively connected with two ends of the bottom notch.

3. The built-in microwave oven according to claim 1, characterized in that: The air inlet mesh includes a side air inlet mesh and a bottom air inlet mesh; the first side cover plate is provided with the side air inlet mesh at a corner portion close to the rear cover plate and the bottom cover plate, and the bottom cover plate is provided with the bottom air inlet mesh at a corner portion close to the first side cover plate and the rear cover plate; The surface where the air inlet of the first fan is located is inclined relative to the bottom cover plate, the surface where the air inlet of the first fan is located faces the side air inlet mesh and the bottom air inlet mesh, the surface where the air outlet of the first fan is located faces the variable frequency power supply, the surface where the air inlet of the second fan is located faces the bottom air inlet mesh or the side air inlet mesh, and the surface where the air outlet of the second fan is located faces the magnetron.

4. The built-in microwave oven according to claim 3, characterized in that: The rear cover plate is provided with a first rear air inlet mesh hole at one corner portion close to the first side cover plate and the bottom cover plate.

5. The built-in microwave oven according to claim 3, characterized in that: The first fan is arranged above the second fan, and an angle A is formed between a central axis of the first fan and a central axis of the second fan, and A is smaller than 90°.

6. The built-in microwave oven according to claim 5, characterized in that: The second fan is a vortex fan, and the upper surface and lower surface of the vortex fan are both provided with air inlets, and the lower surface of the vortex fan is connected to a first air guide cover, and the top plate of the first air guide cover is provided with a first vent which is connected to the air inlet on the lower surface of the vortex fan, and the motor of the vortex fan is arranged in the first air guide cover, and the first air guide cover is arranged in a part of the bottom air inlet mesh, and the projection of the first fan on the bottom cover plate along the vertical direction is located in another part of the bottom air inlet mesh.

7. The built-in microwave oven according to claim 6, characterized in that: A ventilation gap is provided between the first fan and the second fan.

8. The built-in microwave oven according to claim 6, characterized in that: The casing of the variable frequency power supply is provided with a first transverse ventilation duct, the air outlet of the first fan is connected to one of the ports of the first transverse ventilation duct, the outer wall of the other port of the first transverse ventilation duct is connected with a vertical partition and a transverse partition, the vertical partition and the transverse partition are arranged on the periphery of the magnetron, the vertical partition is provided with a second ventilation port, and the air outlet of the second fan is connected to the second ventilation port.

9. The built-in microwave oven according to claim 8, characterized in that: The power connection connector of the magnetron is arranged adjacent to the transverse partition; a third ventilation hole corresponding to the power connection connector of the magnetron is provided on the transverse partition, and the third ventilation hole is located on one side of the transverse partition close to the vertical partition.

10. The built-in microwave oven according to claim 8, characterized in that: It also includes a second air guide cover, the radiator shell of the magnetron is provided with a second transverse ventilation channel, the rear wall of the cooking cavity is provided with a second rear air inlet mesh, the second air guide cover is covered by the second rear air inlet mesh, and the second ventilation port, the second transverse ventilation channel, and the air inlet of the second air guide cover are connected in sequence.

11. The built-in microwave oven according to claim 10, characterized in that: A heat-conducting edge is provided at the air inlet of the second air guide cover, and the heat-conducting edge is in contact with the magnetron.

12. The built-in microwave oven according to any one of claims 1 to 11, characterized in that: It also includes a container connected to the door body for placing cooking objects, and the door body is connected to the side wall of the cooking cavity through a slide rail.

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