Portable microwave oven

Abstract

The utility model provides a portable microwave oven which comprises a shell forming an outer shell of the microwave oven. The heating cavity is arranged in the shell; the door assembly is arranged on the front side of the heating cavity and used for sealing the heating cavity; the filter screen assembly is arranged at the lower part of the door assembly; the electrical cavity is arranged in the shell and located on the lower portion of the outer side of the heating cavity, a partition plate is arranged in the electrical cavity and divides the interior of the electrical cavity into a first area and a second area, a magnetron assembly is arranged in the first area, and a frequency conversion board and a circuit board are arranged in the second area. The electrical element is integrated at the lower part of the heating cavity and does not interfere with the handle at the top, so that an avoiding space is provided for the handle, and the electrical element is also prevented from transferring heat to the handle to influence the handheld moving operation. The electrical cavity is divided into two relatively independent spaces through the arrangement of the partition plate, heat and electromagnetic interference between the two spaces are reduced, it is guaranteed that the internal structure of the electrical cavity is compact, the layout is reasonable, and the operation stability of all parts is fully guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of microwave ovens, in particular to a portable microwave oven with a compact structure. Background Art

[0002] Microwave ovens are commonly used household appliances. They do not require open flames or gas when used to heat food. They are easy to use and have the advantages of fast food heating speed and convenient operation. Common microwave ovens are mostly placed in the kitchen, are heavy, and take up a large space. When users move the microwave oven as needed, it is inconvenient to carry and carry it out. Therefore, in order to adapt to different occasions, people's demand for portable microwave ovens is becoming more and more intense. In the prior art, a patent with a publication number of CN216114186U discloses a portable microwave oven. By setting a handle on the top of the microwave oven, the portability of the microwave oven can be improved. The microwave oven can be carried to different occasions using a movable handle for easy carrying. However, the handle occupies a large space at the top. If the magnetron and other electrical components are set on the upper part of the heating cavity like a traditional microwave oven, the position of the heating cavity will be affected, resulting in the heating cavity being too close to the bottom, and the internal arrangement of the electrical components is unreasonable, which affects the long-term stable operation of the microwave oven. Utility Model Content

[0003] In view of this, the utility model aims to provide a portable microwave oven to solve the problems of small internal space and unreasonable internal arrangement of electrical components in the portable microwave oven in the prior art.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A portable microwave oven comprising

[0006] A housing forming an outer shell of the microwave oven;

[0007] A heating chamber, arranged inside the housing, for containing heated food;

[0008] a door assembly, disposed at the front side of the heating chamber and used for sealing the heating chamber;

[0009] A filter assembly is arranged at the lower part of the door assembly;

[0010] An electrical cavity is arranged inside the shell and located at the lower outer side of the heating cavity. A partition is arranged inside the electrical cavity to separate the interior of the electrical cavity into a first area and a second area. A magnetron assembly is arranged in the first area, and a frequency conversion board and a circuit board are arranged in the second area.

[0011] Furthermore, the filter assembly is arranged on the front side of the electrical cavity.

[0012] Furthermore, a first fan is provided in the first zone. The first fan is arranged opposite to the magnetron assembly. The first fan is arranged on a side close to the filter assembly. The incoming air guided by the first fan blows toward the magnetron assembly to dissipate heat from the magnetron assembly.

[0013] Furthermore, a wind collecting hood is arranged between the first fan and the magnetron assembly, and the expanded side of the wind collecting hood is connected to the first fan, and the closed side of the wind collecting hood is connected to the magnetron assembly.

[0014] Furthermore, a waveguide box is also provided in the first zone, and the waveguide box is provided on a side of the magnetron assembly close to the partition.

[0015] Furthermore, a second fan and a motor are also provided in the second zone. The second fan is arranged on a side close to the filter assembly. The second fan is arranged opposite to the frequency conversion board. The circuit board is arranged on a side of the frequency conversion board away from the second fan. The incoming air guided by the second fan blows toward the frequency conversion board and the circuit board to dissipate heat from the frequency conversion board and the circuit board. The motor is arranged on a side of the frequency conversion board close to the first zone.

[0016] Furthermore, the partition is configured as an inverted basin-shaped structure, and the partition includes a top plate and a baffle plate, wherein the top plate is connected in parallel to the lower side of the bottom surface of the heating chamber, the frequency conversion board and the circuit board are installed at the lower part of the top plate, and the baffle plate is configured as a structure perpendicular to the top plate, the baffle plate is arranged along the edge of the top plate and extends downward, and the second area is a accommodating space formed by the partition.

[0017] Furthermore, the heating chamber includes a frame, a top cover and a back plate, and the frame, the top cover and the back plate surround the internal space of the heating chamber. A front fixing plate is also arranged on the front side of the heating chamber, the upper end of the front fixing plate exceeds the top cover of the heating chamber and extends upward, and the lower end of the front fixing plate exceeds the bottom surface of the heating chamber and extends downward, and the door assembly and the filter assembly are both arranged on the front side of the front fixing plate and connected to the front fixing plate.

[0018] Furthermore, the shell includes a rear shell, a side plate, a bottom plate and a top plate, the rear shell is arranged at the rear side of the rear plate, the rear shell is arranged parallel to the rear plate, the side plate is arranged in two, namely a left plate and a right plate, the left plate and the right plate are arranged opposite to each other and are respectively located on the outside of the two side surfaces of the frame, the left plate and the right plate are respectively parallel to the two side surfaces of the frame, the bottom plate is arranged at the lower part of the bottom surface of the frame, the top plate is arranged at the upper part of the top cover, the bottom surface of the heating cavity forms the top surface of the electrical cavity, the rear plate of the heating cavity extends downward to form the rear side surface of the electrical cavity, the left and right sides of the electrical cavity are formed by the side plates of the shell near the lower part, the filter assembly forms the front side surface of the electrical cavity, and the bottom plate of the shell forms the bottom surface of the electrical cavity.

[0019] Furthermore, the filter assembly includes a support, a filter layer and a grille, wherein the filter layer and the grille are both installed in the support, wherein the grille is located on the outside, the filter layer is arranged between the support and the grille, and the support is connected to the front fixing plate by snap fasteners and / or screw connectors.

[0020] Compared with the prior art, the portable microwave oven described in the utility model has the following advantages:

[0021] The electrical components are integrated in the lower part of the heating chamber, so as not to interfere with the handle at the top, and provide a space for the handle to avoid interference. Compared with the electrical components arranged at the top, it also avoids the electrical components transferring heat to the handle and affecting the hand-held movement operation. In addition, the utility model divides the electrical chamber into two relatively independent spaces by setting a partition, reduces the heat and electromagnetic interference between each other, ensures the compact structure and reasonable layout of the internal structure of the electrical chamber, and fully guarantees the operation stability of each component. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a portable microwave oven according to an embodiment of the utility model;

[0023] Figure 2 This is a schematic structural diagram of the portable microwave oven according to an embodiment of the utility model from another viewing angle;

[0024] Figure 3 This is an exploded view of the portable microwave oven according to the embodiment of the utility model with the bottom plate removed;

[0025] Figure 4 This is an exploded view of the portable microwave oven according to the embodiment of the utility model with the bottom plate removed;

[0026] Figure 5 This is a schematic structural diagram of the portable microwave oven according to an embodiment of the utility model with the bottom plate removed;

[0027] Figure 5a for Figure 5 A partial enlarged view of the part selected by the dashed line;

[0028] Figure 6 This is a schematic structural diagram of the portable microwave oven according to an embodiment of the utility model after the left side panel and the door assembly are removed;

[0029] Figure 7 This is a schematic structural diagram of the portable microwave oven according to an embodiment of the utility model after the left and right side panels and the door assembly are removed;

[0030] Figure 8 This is a schematic structural diagram of the portable microwave oven according to an embodiment of the utility model with the housing removed;

[0031] Fig. 9 This is a schematic diagram of the structure of the air collecting cover of the portable microwave oven according to an embodiment of the utility model;

[0032] Fig.10 This is a schematic diagram of the structure of the filter assembly according to an embodiment of the utility model;

[0033] Fig.11 This is an exploded view of the filter assembly described in an embodiment of the utility model;

[0034] Fig.12 An exploded view of the filter assembly according to an embodiment of the utility model from another perspective;

[0035] Fig.13 The anode temperature detection result of the magnetron after the wind collecting cover and dustproof cotton are set as described in the embodiment of the utility model;

[0036] Fig.14 This is the magnetron anode temperature detection result without the wind condenser and dustproof cotton.

[0037] Description of reference numerals:

[0038] Shell 1, rear shell 11, upper air outlet 111, lower air outlet 112, side plate 12, left plate 12a, right plate 12b, bottom plate 13, top plate 14, heating chamber 2, frame 21, side air inlet 211, side air outlet 212, top cover 22, top air outlet 221, rear plate 23, air hole 231, heat dissipation hole 232, front fixing plate 24, electrical chamber 3, first zone 3b, second zone 3 a, partition 30, baffle 301, left baffle 301a, right baffle 301b, step 302, magnetron assembly 31, wind condenser 32, flared end 321, connecting ear 3211, closed end 322, first fan 33, waveguide box 34, second fan 35, frequency conversion board 36, circuit board 37, motor 38, door assembly 4, filter assembly 5, support 51, filter layer 52, grille 53 DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0040] It should be noted that all terms used in the present invention for directional and positional indications, such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "top", "lower", "lateral", "longitudinal", "center", etc., are only used to explain the relative positional relationship and connection conditions between the components in a certain 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, and therefore cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0041] 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, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The term "on..." means supported by... elements or indirectly.

[0042] like Figures 1 to 12 As shown, the portable microwave oven includes a shell 1, a heating cavity 2, an electrical cavity 3 and a door assembly. The shell 1 forms the outer shell of the microwave oven. The heating cavity 2 is arranged inside the shell 1. The interior of the heating cavity 2 is used to hold food to be heated. The heating cavity 2 includes a frame 21, a top cover 22 and a back plate 23. The frame 21, the top cover 22 and the back plate 23 form an internal space of the heating cavity 2. The electrical cavity 3 is arranged at the lower outer side of the heating cavity 2. The electrical cavity 3 is located inside the shell 1. Due to the arrangement of the frame 21, the top cover 22 and the back plate 23, the electrical cavity 3 is located inside the shell 1 and separated from the heating cavity 2, so as to prevent the heat inside the heating cavity from affecting the normal operation of the electrical components in the electrical cavity when heating food.

[0043] Specifically, the frame 21 of the heating chamber 2 is set as a U-shaped frame, the middle plate of the U-shaped frame forms the bottom surface of the heating chamber 2, the two sides of the U-shaped frame respectively form the left and right sides of the heating chamber 2, the top cover 22 connects the tops of the left and right sides of the U-shaped frame to form the top surface of the heating chamber 2, the top cover 22 and the U-shaped frame form a square structure, the top cover 22 and the rear side of the U-shaped frame are both sealed and connected to the rear plate 23, thereby forming the rear side of the heating chamber 2 by the rear plate 23. The door assembly 4 is set at the front side of the top cover 22 and the U-shaped frame, the front side of the heating chamber 2 is sealed by the door assembly 4, and the user opens the heating chamber 2 through the door assembly 4 to take in and put in food.

[0044] The housing 1 includes a rear housing 11, a side panel 12, a bottom panel 13 and a top panel 14. The rear housing 11 is arranged at the rear side of the rear panel 23 of the heating chamber 2, and the rear housing 11 is arranged parallel to the rear panel 23. The side panels 12 are arranged in two, namely, a left panel 12a and a right panel 12b. The left panel 12a and the right panel 12b are arranged opposite to each other and are respectively located outside the two side surfaces of the frame 21. The left panel 12a and the right panel 12b are respectively parallel to the two side surfaces of the frame 21. The bottom panel 13 is arranged at the lower part of the bottom surface of the frame 21, and the top panel 14 is arranged at the upper part of the top cover 22. A handle structure is arranged on the top panel 14 to facilitate the portable movement of the microwave oven. The rear housing 11, the side panels 12, the bottom panel 13 and the top panel 14 form a three-dimensional structure with an opening at the front end, thereby forming a flat structure of the shell of the microwave oven.

[0045] The portable microwave oven further comprises a filter assembly 5, which is substantially flush with the door assembly 4 and is arranged at the lower part of the door assembly 4. The filter assembly 5 and the door assembly 4 cooperate with the housing 1 to form a microwave oven structure with a smooth appearance, ensuring a beautiful appearance.

[0046] Furthermore, since both the door assembly 4 and the filter assembly 5 are relatively thick, in order to ensure that the two are firmly installed, a front fixing plate 24 is also provided on the front side of the heating chamber 2. The upper end of the front fixing plate 24 exceeds the top cover 22 of the heating chamber 2 and extends upward, and the lower end of the front fixing plate 24 exceeds the bottom surface of the heating chamber 2 and extends downward. The front fixing plate 24 is preferably set to a metal material to increase the mechanical strength. The door assembly 4 and the filter assembly 5 are both set on the front side of the front fixing plate 24 and connected to the front fixing plate 24 to increase the connection strength between the two, wherein the door assembly 4 is set on the front side of the front fixing plate 24 and close to the upper position, and the filter assembly 5 is set on the front side of the front fixing plate 24 and close to the lower position.

[0047] As part of the embodiment of the utility model, the rear plate 23 is set to be flush with the front fixing plate 24, and the lower end of the rear plate 23 also exceeds the bottom surface of the heating chamber 2 and extends downward, and the rear plate 23 is also set to a metal material. The front fixing plate 24 and the rear plate 23 together form a supporting and fixing function for the heating chamber 2 and other components.

[0048] The electrical cavity 3 is arranged at the lower part of the bottom surface of the heating cavity 2, and the bottom surface of the heating cavity 2 forms the top surface of the electrical cavity 3. The rear plate 23 of the heating cavity 2 extends downward to form the rear side surface of the electrical cavity 3. The left and right sides of the electrical cavity 3 are formed by the side plate 12 of the shell 1 near the lower part. The filter assembly 5 is arranged on the front side of the electrical cavity to form the front side surface of the electrical cavity 3. The bottom plate 13 of the shell 1 forms the bottom surface of the electrical cavity 3, thereby isolating the electrical cavity 3 from the heating cavity 2 and the outside world, preventing the internal temperature of the heating cavity 2 from affecting the operation of the electrical components in the electrical cavity 3, and at the same time preventing the electrical cavity 3 from being exposed to the outside, thereby ensuring the stable operation of the electrical components.

[0049] A partition 30 is arranged inside the electrical cavity 3, and the partition 30 divides the electrical cavity 3 into a first area 3b and a second area 3a, and the first area 3b and the second area 3a are respectively located near the two side panels 12. The first area 3b is arranged on a side close to the right side panel 12b, and a magnetron assembly 31 is arranged in the first area 3b; the second area 3a is arranged on a side close to the left side panel 12a, and a frequency conversion board 36 and a circuit board 37 are arranged in the second area 3a, thereby separating the magnetron assembly 31 from the frequency conversion board 36 and the circuit board 37. Even if the magnetron assembly 31 is close to the frequency conversion board 36 and the circuit board 37, the partition reduces the heat and electromagnetic interference between them, and fully ensures the operation stability of each component on the basis of ensuring a compact structure and reasonable layout inside the electrical cavity.

[0050] Furthermore, a first fan 33 is also provided in the first zone 3b, and the first fan 33 is arranged opposite to the magnetron assembly 31, and the incoming air guided by the first fan 33 is blown toward the magnetron assembly 31 to dissipate heat for the magnetron assembly 31. The first fan 33 is arranged on a side close to the filter assembly 5, and the first fan 33 is connected to the front fixing plate 24. After the external wind is filtered by the filter assembly 5, it is guided by the first fan 33 into the first zone 3b to dissipate heat and cool the magnetron assembly 31, and the wind after passing through the magnetron assembly 31 is discharged to the outside of the microwave oven through the rear plate 23 and the rear shell 11. Correspondingly, a heat dissipation hole 232 is provided at a position opposite to the first fan 33 on the rear plate 23, and a lower air outlet 112 is provided on the rear shell 11, so that the wind passing through the first zone is discharged to the outside of the microwave oven through the heat dissipation hole 232 and the lower air outlet 112.

[0051] In order to further improve the heat dissipation strength of the first fan 33 to the magnetron assembly, a wind collecting cover 32 is arranged between the first fan 33 and the magnetron assembly 31. Fig. 9As shown, the flared side of the wind condenser 32 is connected to the first fan 33, and the closed side of the wind condenser 32 is connected to the magnetron assembly 31. Specifically, the wind condenser 32 includes a flared end 321 and a closed end 322, wherein the outer circumferential side of the edge of the flared end 321 is provided with a connecting ear 3211 extending radially outward, the wind condenser 32 is connected and fixed to the first fan 33 through the connecting ear 3211, and the closed end 322 is arranged in a direction away from the connecting ear 3211, and the inner diameter of the wind condenser 32 gradually and smoothly shrinks and transitions from the flared end 321 to the closed end 322. Thus, the wind generated by the first fan 33 is gathered within a smaller air outlet range by the setting of the wind condenser, preventing the wind from excessively diffusing to the surroundings, thereby making the wind more concentrated and increasing the wind speed, and the setting of the wind condenser can reduce the occurrence of turbulence, so that the wind can be better spread and maintain a higher efficiency, thereby improving its heat dissipation effect on the magnetron assembly 31. In addition, the setting of the wind condenser can also reduce the noise generated by the first fan. The arrangement of the wind collecting hood enables efficient heat dissipation of the magnetron assembly to be achieved in the narrow space of the portable microwave oven.

[0052] A waveguide box 34 is also provided in the first zone 3b. The waveguide box 34 is provided on a side of the magnetron assembly 31 close to the partition 30. The side of the waveguide box 34 away from the magnetron assembly 31 is in contact with the partition 30 or maintains a gap. The top of the waveguide box 34 is connected to the interior of the heating cavity 2. The waveguide box 34 is used to effectively transmit the microwaves generated by the magnetron assembly 31 to the interior of the heating cavity 2, so as to effectively heat the food in the heating cavity 2.

[0053] A second fan 35 is also provided in the second zone 3a. The second fan 35 is arranged opposite to the frequency conversion board 36. The circuit board 37 is arranged on the side of the frequency conversion board 36 away from the second fan 35. The air intake guided by the second fan 35 blows toward the frequency conversion board 36 and the circuit board 37 to dissipate heat from the frequency conversion board 36 and the circuit board 37. The second fan 35 is arranged on the side close to the filter assembly 5. The second fan 35 is connected to the front fixing plate 24. After being filtered by the filter assembly 5, the external air is guided by the second fan 35 into the second zone 3a to dissipate heat and cool the frequency conversion board 36 and the circuit board 37. The air after passing through the frequency conversion board 36 and the circuit board 37 is discharged to the outside of the microwave oven through the rear plate 23 and the rear shell 11. Correspondingly, a heat dissipation hole 232 is provided on the rear plate 23 at a position opposite to the first fan 33, and a lower air outlet 112 is provided on the rear shell 11, so that the wind after passing through the frequency conversion board 36 and the circuit board 37 and other components in the second zone is discharged to the outside of the microwave oven through the heat dissipation hole 232 and the lower air outlet 112.

[0054] A motor 38 is also provided in the second zone 3a. The motor 38 is provided on a side of the frequency conversion board 36 close to the first zone 3b. The motor 38 is connected to a stirrer (not shown in the figure).

[0055] Specifically, the partition 30 is configured as an inverted basin-shaped structure. The partition 30 includes a top plate (which is blocked by the frequency conversion board and the circuit board and is not shown in the figure) and a baffle plate 301, wherein the top plate is connected in parallel to the lower side of the bottom surface of the heating chamber 2, and the frequency conversion board 36, the circuit board 37 and the motor 38 are installed at the lower part of the top plate. The baffle plate 301 is configured as a structure perpendicular to the top plate, and the baffle plate 301 is arranged along the edge of the top plate and extends downward, so that the second area 3a is a accommodating space formed by the partition 30. As an embodiment of the utility model, a step 302 structure parallel to the top plate can also be provided in the partition 30, and the motor 38 is installed on the step 302, so that the shaft of the motor 38 extends out to connect with the agitator, and the step 302 is arranged to provide avoidance space for the agitator and the motor shaft.

[0056] Further, such as Figure 5 and 5a As shown, the enclosure baffle 301 includes a front baffle, a rear baffle, a left baffle 301a and a right baffle 301b (the front baffle and the rear baffle are not shown because they are blocked), wherein the front baffle is located on a side close to the front fixing plate 24, the lower part of the front baffle is fixedly connected to the front fixing plate 24, the rear baffle is located on a side close to the rear plate 23, the rear baffle is fixedly connected to the rear plate 23, and the front fixing plate 24 and the rear plate 23 form a supporting and fixing effect on the partition 30 and the electrical components inside it. The left baffle 301a is arranged on a side close to the left side plate 12a of the shell, and the right baffle 301b is arranged on a side close to the first area 3b, and the right baffle 301b forms a boundary between the first area 3b and the second area 3a. Preferably, the shape of the right baffle 301b can be adaptively adjusted and transformed according to the shapes of the frequency conversion board 36, the circuit board 37 and the motor 38. For example, the shape of the right baffle 301b can be a flat plate, or a bent plate or an arc plate. In this embodiment, the arrangement of the left baffle 301a and the right baffle 301b can also prevent the hot air containing water vapor discharged from the heating chamber 2 from entering the second zone 3a, thereby protecting the electrical components in the second zone 3a.

[0057] As an embodiment of the utility model, the partition 30 can also be configured to include only the baffle plate 301 structure, omitting the top plate, and directly fixing components such as the frequency conversion board 36 and the circuit board 37 on the lower side of the bottom surface of the heating chamber 2.

[0058] like Figures 10-12As shown, the filter assembly 5 includes a support 51, a filter layer 52 and a grille 53. The filter layer 52 and the grille 53 are both installed in the support 51, wherein the grille 53 is located on the outside, and the filter layer 52 is arranged between the support 51 and the grille 53, and effectively filters the wind passing through the grille. The filter layer 52 is set as a soft mesh structure, and the filter layer 52 can be fixed by the clamping effect of the grille 53 and the support 51. A buckle structure part is arranged around the grille 53, and the grille 53 is detachably connected to the support 51 through the buckle structure, which is convenient for disassembling the filter assembly to disassemble and replace or clean the filter layer.

[0059] The support 51 is connected to the front fixing plate 24 by a buckle and / or a screw connection. Preferably, the upper portion of the support 51 is connected to the front fixing plate 24 by a buckle, and the lower portion and the side of the support 51 are connected to the front fixing plate 24 by a screw connection, thereby making the filter assembly 5 firmly connected to the front fixing plate, and preventing the filter assembly from vibrating and loosening when the fan is working.

[0060] In the present embodiment, there is no specific limitation on the shape of the buckle, as long as it can achieve tight connection and facilitate disassembly.

[0061] As a preferred embodiment, the filter layer 52 can be set as a two-layer structure, specifically including a filter and dust-proof cotton. The provision of the dust-proof cotton can reduce the burden of the filter, has an electrostatic charging function, can further improve the adsorption capacity of tiny particles, and enhance the filtering effect. However, for conventional microwave ovens, when the dust-proof cotton is added, it will affect the rate at which wind passes through the filter assembly 5, thereby reducing the air intake and affecting the cooling and heat dissipation effect in the electrical cavity. In the embodiment of the present application, due to the joint provision of the wind hood and the dust-proof cotton, not only a good filtering effect is achieved, but also the wind hood supplements and strengthens the air intake of the first fan. Compared with the solution without the wind hood and dust-proof cotton, Fig.13 and 14 As shown, the cooling effect on the magnetron anode is more obvious. The specific comparison is as follows:

[0062] The applicant tested the anode temperature of the magnetron using the same type of fan for the structure with dustproof cotton and wind condenser and the structure without dustproof cotton and wind condenser. The test results when the dustproof cotton was installed are as follows: Fig.13 As shown in the figure, the test results without installing dustproof cotton are as follows Fig.14 As shown, the following conclusions can be drawn:

[0063] The portable microwave oven disclosed in the present application, by providing an air collecting hood and a microwave oven filter assembly including dust-proof cotton, can achieve air cooling performance for the magnetron assembly 31 that still meets the performance requirements of the microwave oven in normal use. In combination with the air collecting hood, the anode temperature of the magnetron is about 20°C lower than the air cooling solution of the microwave oven in the prior art that is not equipped with dust-proof cotton and air collecting hood, which significantly reduces the working environment temperature of the magnetron, optimizes the heat dissipation effect, and helps to improve the overall performance and reliability of the microwave oven and extend its service life.

[0064] As part of the embodiment of the utility model, the microwave oven structure with a unique internal structure of the utility model can also play a role in heat dissipation inside the heating cavity 2. Specifically, Figure 6 and 7 As shown, a side air inlet 211 is provided on the side of the heating cavity 2, and the side air inlet 211 is provided on a side (right side) close to the first zone 3b. The air intake guided by the first fan 33 in the first zone 3b at least partially passes through the side air inlet 211 to enter the heating cavity 2 to take away the heat inside the heating cavity 2, and the rest is still discharged to the outside of the microwave oven through the rear plate 23 and the rear shell 11. Specifically, the side air inlet 211 is provided on the side of the frame 21 and close to the rear plate 23. A plurality of side air inlet 211 are arranged in an array along the height direction of the side of the frame 21 to ensure that sufficient air enters the heating cavity 2.

[0065] A side air outlet 212 is provided on the other side (left side) of the heating chamber 2. The side air outlet 212 is provided on the left side of the heating chamber 2 and near the top. The air inside the heating chamber 2 is discharged from the side air outlet 212 to the outside of the heating chamber 2. Specifically, a plurality of side air outlets 212 are provided along the front-to-back direction of the side of the frame 21 and are arranged in an array to ensure that the hot air inside the heating chamber 2 is quickly discharged from the heating chamber 2. At the same time, an air hole 231 is provided on the edge of the rear plate 23 near the left side. The air hole 231 is provided near the side air outlet 212, so that the hot air discharged from the heating chamber 2 is discharged to the outside of the microwave oven housing 1 through the air hole 231 and the rear shell 11.

[0066] In addition, in the present embodiment, the air inlet of the heating chamber 2 (formed by a plurality of side air inlet holes 211) is arranged on the right side and within a wider range up and down, and the air outlet of the heating chamber 2 is correspondingly arranged on the left side and within a wider range in the upper front and back, so that the wind entering the heating chamber 2 flows from left to right and from bottom to top, thereby fully cooling and dissipating the heat in the heating chamber 2.

[0067] Further, such as Figure 8 As shown, a top air outlet 221 is also provided on the top cover 22 of the heating chamber 2 , and part of the heat inside the heating chamber 2 is discharged to the outside of the heating chamber 2 through the top air outlet 221 .

[0068] As part of an embodiment of the utility model, the top of the rear plate 23 is at a certain distance from the top of the rear shell 11, and an upper air outlet 111 is provided near the upper part of the rear shell 11, so that the hot air discharged through the top air outlet 221 of the heating chamber 2 is discharged to the outside of the shell after passing through the top of the rear plate 23 and the upper air outlet 111 of the rear shell; the hot air discharged through the side air outlet 212 of the heating chamber 2 passes through the air holes 231 of the rear plate 23, and then is discharged to the outside of the shell through the upper air outlet 111 of the rear shell, thereby fully dissipating the heat inside the heating chamber.

[0069] Although the utility model is disclosed as above, the utility model 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 utility model. Therefore, the protection scope of the utility model shall be subject to the scope defined by the claims.

Claims

1. A portable microwave oven, characterized in that: include A housing (1) forming an outer shell of the microwave oven; A heating chamber (2), arranged inside the housing (1) and used for containing heated food; A door assembly (4) is arranged at the front side of the heating chamber (2) and is used to seal the heating chamber (2); An electrical chamber (3) is arranged inside the shell (1) and is located at the lower part of the heating chamber (2). A partition (30) is arranged inside the electrical chamber (3), and the partition (30) divides the interior of the electrical chamber (3) into a first area (3b) and a second area (3a). A magnetron assembly (31) is arranged in the first area (3b), and a frequency conversion board (36) and a circuit board (37) are arranged in the second area (3a).

2. The portable microwave oven according to claim 1, characterized in that: The microwave oven further comprises a filter assembly (5), wherein the filter assembly (5) is arranged at the front side of the electrical cavity (3).

3. The portable microwave oven according to claim 2, characterized in that: A first fan (33) is also provided in the first zone (3b). The first fan (33) is arranged opposite to the magnetron assembly (31). The first fan (33) is arranged on a side close to the filter assembly (5). Inlet air guided by the first fan (33) is blown toward the magnetron assembly (31) to dissipate heat from the magnetron assembly (31).

4. The portable microwave oven according to claim 3, characterized in that: A wind collecting hood (32) is arranged between the first fan (33) and the magnetron assembly (31); the expanded side of the wind collecting hood (32) is connected to the first fan (33), and the closed side of the wind collecting hood (32) is connected to the magnetron assembly (31).

5. The portable microwave oven according to claim 1 or 3, characterized in that: A waveguide box (34) is also arranged in the first area (3b), and the waveguide box (34) is arranged on a side of the magnetron assembly (31) close to the partition (30).

6. The portable microwave oven according to claim 2, characterized in that: A second fan (35) and a motor (38) are also provided in the second zone (3a); the second fan (35) is provided on a side close to the filter assembly (5); the second fan (35) is arranged opposite to the frequency conversion board (36); the circuit board (37) is provided on a side of the frequency conversion board (36) away from the second fan (35); the inlet air guided by the second fan (35) blows toward the frequency conversion board (36) and the circuit board (37) to dissipate heat for the frequency conversion board (36) and the circuit board (37); and the motor (38) is provided on a side of the frequency conversion board (36) close to the first zone (3b).

7. The portable microwave oven according to claim 1, characterized in that: The partition (30) is configured as an inverted basin-shaped structure, and the partition (30) includes a top plate and a baffle plate (301), wherein the top plate is connected in parallel to the lower side of the bottom surface of the heating chamber (2), the frequency conversion board (36) and the circuit board (37) are installed at the lower part of the top plate, and the baffle plate (301) is configured as a structure perpendicular to the top plate, and the baffle plate (301) is arranged along the edge of the top plate and extends downward, and the second area (3a) is a accommodating space formed by the partition (30).

8. The portable microwave oven according to claim 2, characterized in that: The heating chamber (2) comprises a frame (21), a top cover (22) and a rear plate (23); the frame (21), the top cover (22) and the rear plate (23) enclose an internal space of the heating chamber (2); a front fixing plate (24) is also arranged on the front side of the heating chamber (2); the upper end of the front fixing plate (24) exceeds the top cover (22) of the heating chamber (2) and extends upward; the lower end of the front fixing plate (24) exceeds the bottom surface of the heating chamber (2) and extends downward; the door assembly (4) and the filter assembly (5) are both arranged on the front side of the front fixing plate (24) and connected to the front fixing plate (24).

9. The portable microwave oven according to claim 8, characterized in that: The shell (1) comprises a rear shell (11), a side plate (12), a bottom plate (13) and a top plate (14); the rear shell (11) is arranged at the rear side of the rear plate (23); the rear shell (11) and the rear plate (23) are arranged in parallel; the side plate (12) comprises a left side plate (12a) and a right side plate (12b); the left side plate (12a) and the right side plate (12b) are arranged opposite to each other and are respectively located on the outside of the two side surfaces of the frame (21); the left side plate (12a) and the right side plate (12b) are respectively parallel to the two side surfaces of the frame (21); the bottom plate (13) and the top plate (14) are respectively parallel to the two side surfaces of the frame (21); The plate (13) is arranged at the lower part of the bottom surface of the frame (21), the top plate (14) is arranged at the upper part of the top cover (22), the bottom surface of the heating chamber (2) forms the top surface of the electrical chamber (3), the rear plate (23) of the heating chamber (2) extends downward to form the rear side surface of the electrical chamber (3), the left and right sides of the electrical chamber (3) are formed by the side plate (12) of the shell (1) near the lower part, the filter assembly (5) forms the front side surface of the electrical chamber (3), and the bottom plate (13) of the shell (1) forms the bottom surface of the electrical chamber (3).

10. The portable microwave oven according to claim 8, characterized in that: The filter assembly (5) comprises a support (51), a filter layer (52) and a grille (53); the filter layer (52) and the grille (53) are both installed in the support (51), wherein the grille (53) is located on the outside, the filter layer (52) is arranged between the support (51) and the grille (53), and the support (51) is connected to the front fixing plate (24) via a buckle and / or screw connection.

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