Vehicle-mounted microwave oven

Abstract

The utility model provides a vehicle-mounted microwave oven, which is mounted in a vehicle head cabinet and comprises a shell, a heating cavity is arranged in the shell, an electrical cavity is formed between the shell and the heating cavity, the electrical cavity is positioned on one side of the heating cavity, a filter plate is arranged at the top of the heating cavity, and the filter plate is arranged in the heating cavity. The filter plate is located on the side, away from the electrical cavity, of the heating cavity, the volume of the heating cavity is V1, the total volume of the vehicle-mounted microwave oven is V2, and V1 = (0.35-0.45) * V2. According to the vehicle-mounted microwave oven, the vehicle-mounted microwave oven is improved, EMC (Electro Magnetic Compatibility) interference does not exist among internal components, the heat dissipation requirement can also be met in a high-temperature extreme environment in summer, the operation requirement in a vehicle-mounted environment can be met, the operation reliability is good, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted equipment, in particular to a vehicle-mounted microwave oven. Background Art

[0002] As infrastructure projects are advanced, the number of heavy trucks, as an important tool in the transportation industry, continues to grow steadily; and with the continued popularity of the tourism market, the number of RVs has exploded. Microwave ovens are common household appliances that can heat food with microwaves. The entire process does not involve open flames or gas. They are safe and reliable and can significantly improve the quality of life of drivers, making them popular.

[0003] A headboard is provided on the top of the cockpit of an existing RV or truck, but the space is limited and a household microwave oven cannot be placed in the headboard. If the microwave oven is simply scaled down, all parts need to be re-molded, which greatly increases the cost and significantly reduces the volume of the heating cavity, making it extremely impractical.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] The problem solved by the utility model is that the existing vehicle-mounted microwave oven has an unreasonable structure, resulting in poor practicality.

[0006] The utility model provides a vehicle-mounted microwave oven, which is installed in a vehicle front cabinet. The vehicle-mounted microwave oven comprises a shell, a heating cavity is arranged in the shell, an electrical cavity is formed between the shell and the heating cavity, the electrical cavity is located at one side of the heating cavity, a filter plate is arranged on the top of the heating cavity, the filter plate is located at a side of the heating cavity away from the electrical cavity, the volume of the heating cavity is V1, and the total volume of the vehicle-mounted microwave oven is V2, wherein V1=(0.35-0.45)*V2.

[0007] By arranging the filter board on the side of the heating cavity away from the electrical cavity, the internal space can be fully utilized, and the high proportion of the heating cavity makes the vehicle-mounted microwave oven more practical. At the same time, the filter board will not generate EMC interference to the components in the electrical cavity, and the temperature rise rate of related electronic components meets the requirements of the vehicle-mounted environment.

[0008] Preferably, a frequency conversion board is arranged at the bottom of the electrical cavity, the heating cavity includes a cavity rear plate, and a fan assembly is arranged on the cavity rear plate for blowing air into the electrical cavity; the fan assembly includes a first fan, and the minimum distance L1 between the first fan and the frequency conversion board is 10-15 cm. This arrangement does not require other components to be arranged between the frequency conversion board and the first fan, ensuring that the heating speed of the frequency conversion board meets the requirements and ensuring stable operation in a vehicle-mounted environment.

[0009] Preferably, a waveguide box is arranged on the top of the heating chamber, one end of the waveguide box extends into the electrical chamber, a magnetron is arranged in the electrical chamber, the magnetron is located on the upper side of the frequency conversion board and is fixedly connected to the waveguide box. This arrangement has a compact structure and high space utilization.

[0010] Preferably, the fan assembly includes a second fan, the second fan is located above the first fan, and the first fan and the second fan are respectively located on the outer side and the inner side of the rear plate of the cavity.

[0011] Since the size of the electrical cavity in the vehicle-mounted microwave oven is small, a single fan is difficult to meet the heat dissipation requirements. The second fan is used to blow air directly to the magnetron and the first fan is used to blow air directly to the frequency conversion board, which can meet the heat dissipation requirements of the main components; and the first fan and the second fan are respectively arranged on both sides of the rear plate of the cavity, which can ensure that the distances between the first fan, the second fan and the head cabinet are basically the same, so that they have similar wind pressures, and ensure that the operating power of the two fans and the size of the airflow blowing into the electrical cavity are basically the same;

[0012] Preferably, the housing includes a top plate, the top plate includes a first flat plate, a relief portion is arranged on the rear side of the first flat plate, and the relief portion is generally arc-shaped or stepped. This arrangement enables the vehicle-mounted microwave oven to adapt to the shape of the vehicle head cabinet, and the space utilization rate inside the vehicle head cabinet is high.

[0013] Preferably, the avoidance portion includes a first vertical plate and a second flat plate connected to each other, the second flat plate is arranged lower than the first flat plate, the second flat plate is provided with a first inclined plate inclined downward at one end away from the first vertical plate, the first inclined plate is provided with a second inclined plate at one end close to the fan assembly, and the inclination angles of the first inclined plate and the second inclined plate are α1 and α2 respectively, wherein 0°<α1<α2<90°. This arrangement allows the power cord to pass through the first vertical plate to be assembled and connected to the filter plate, which facilitates the disassembly, assembly and maintenance of the vehicle-mounted microwave oven.

[0014] Preferably, the housing further comprises a first side plate and a second side plate, the first side plate and the second side plate are respectively located on both sides of the top plate, the magnetron is provided with a magnetron bracket on a side close to the first side plate, and the magnetron bracket is fixedly connected to the first side plate. This arrangement has a simple structure, can further improve the assembly stability and reliability of the magnetron, and meet the service life in a vehicle-mounted environment.

[0015] Preferably, the vehicle-mounted microwave oven further comprises an air guide hood connected to the heating cavity, the heating cavity comprises a cover plate located at the top, an air inlet is arranged on the side of the heating cavity close to the electrical cavity, the air guide hood is fixedly connected to the cover plate, and a filter assembly is arranged at the outlet end of the air guide hood. This arrangement can filter the moisture, oil droplets, etc. generated in the heating cavity, ensuring that the air in the cockpit will not be polluted when heating food.

[0016] Preferably, the vehicle-mounted microwave oven also includes a connecting component, which includes a first bracket and a second bracket located on both sides of the shell and is used to be fixedly connected to the front cabinet; the connecting component also includes a bottom bracket, which is fixed in the front cabinet and is used to be limited and fixed with the bottom plate.

[0017] Preferably, the heating chamber comprises a front plate, the front plate is provided with a front plate flange on a side close to the first side plate, the first bracket is provided on a side of the first side plate away from the front plate flange, and the front plate flange is provided with a fixing hole for fixing the first side plate and the first bracket at the same time. This arrangement can fix the vehicle-mounted microwave oven in the horizontal and vertical directions, with high assembly efficiency and good reliability.

[0018] Compared with the prior art, the vehicle-mounted microwave oven described in the utility model has the following beneficial effects: 1) By eliminating EMC interference between components in the vehicle-mounted microwave oven and meeting the heat dissipation requirements even in extreme high temperature environments in summer, it is highly practical; 2) By improving the structure of the microwave oven, it can meet the operating requirements in a vehicle environment and has good operating reliability; 3) The structure is simple and easy to produce and process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an overall schematic diagram of the vehicle-mounted microwave oven according to an embodiment of the utility model;

[0020] Figure 2 Another perspective view of the vehicle-mounted microwave oven according to the embodiment of the utility model;

[0021] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0022] Figure 4 This is an exploded schematic diagram of the door assembly according to an embodiment of the utility model;

[0023] Figure 5 for Figure 4 A local enlarged view of A1 in the middle;

[0024] Figure 6 This is a schematic diagram of an explosion of a vehicle-mounted microwave oven according to an embodiment of the utility model;

[0025] Figure 7 This is a schematic diagram of the structure of the connecting bracket according to an embodiment of the utility model;

[0026] Figure 8 This is a schematic diagram of the structure of the bottom bracket according to an embodiment of the utility model;

[0027] Fig. 9This is a schematic diagram of the internal structure of the vehicle-mounted microwave oven according to an embodiment of the utility model;

[0028] Fig.10 Another perspective view of the internal structure of the vehicle-mounted microwave oven according to the embodiment of the utility model;

[0029] Fig.11 for Fig.10 A partial enlarged view of point B in the middle;

[0030] Fig.12 for Figure 2 A schematic cross-sectional view of the vehicle-mounted microwave oven along the AA side;

[0031] Fig.13 for Fig.12 A partial enlarged view of point C in the middle;

[0032] Fig.14 This is a schematic diagram of the structure of the filter plate described in the embodiment of the utility model;

[0033] Fig.15 It is a schematic structural diagram of the filter plate bracket described in an embodiment of the utility model.

[0034] Description of reference numerals:

[0035] 1-housing; 11-top plate; 111-first flat plate; 112-avoidance portion; 1121-first vertical plate; 1122-second flat plate; 1123-first inclined plate; 1124-second inclined plate; 12-first side plate; 13-second side plate; 14-bottom plate; 141-furnace foot; 142-first raised portion; 143-second raised portion; 144-bending portion; 145-side flange; 146-avoidance groove; 2- Door assembly; 21-door and window plate; 22-door frame; 23-door body; 231-U-shaped folding edge; 232-ear plate; 233-reinforced concave platform; 24-shutter; 3-filter assembly; 4-connection assembly; 41-first bracket; 42-second bracket; 43-bottom bracket; 431-guide groove; 432-notch; 433-limiting member; 434-recessed part; 435-folding edge; 44-connection bracket; 441-first bracket A folded edge; 442-recessed portion; 443-fixing plate; 444-support plate; 445-weight-reducing hole; 446-installation hole; 5-control panel; 51-first air outlet; 6-heating chamber; 61-chamber rear plate; 62-cover plate; 63-front plate; 631-front plate flange; 632-front plate air outlet; 64-wave-transmitting plate; 641-clamping column; 642-stud; 643-clamping groove; 644-rubber pad; 7 - fan assembly; 71 - first fan; 72 - second fan; 8 - electrical cavity; 81 - magnetron; 82 - frequency conversion board; 83 - waveguide box; 84 - magnetron bracket; 85 - frequency conversion board bracket; 86 - filter board; 87 - filter bracket; 871 - assembly hole; 872 - assembly column; 873 - card slot; 874 - contraction mouth; 875 - second flange; 876 - boss; 877 - support column; 88 - wind guide cover. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below with reference to the accompanying drawings. Under the premise of no conflict, the technical features in each embodiment of the utility model can be combined with each other.

[0037] In-car microwave ovens allow drivers and passengers to easily heat food in the car without having to get out of the car to find a restaurant or convenience store. This is especially useful when traveling long distances, camping outdoors, or waiting, and can improve the driver's quality of life. They are usually installed in the front cabinet. In order to adapt to the shape of the front of the car, the rear of the front cabinet is generally curved and the internal space is limited. It is obviously very important to improve the structure of the in-car microwave oven so that the heating cavity accounts for a higher proportion.

[0038] like Figure 1-15As shown, a vehicle-mounted microwave oven comprises a housing 1 and a heating cavity 6, wherein an electrical cavity 8 is formed between the housing 1 and the heating cavity 6, wherein the electrical cavity 8 is located on one side of the heating cavity 6, and a filter plate is arranged on the top of the heating cavity, wherein the filter plate is located on the side of the heating cavity away from the electrical cavity, and the volume of the heating cavity is V1, and the total volume of the vehicle-mounted microwave oven is V2, wherein V1 = (0.35-0.45)*V2. By arranging the filter plate on the side of the heating cavity away from the electrical cavity, the internal space can be fully utilized, and the high proportion of the heating cavity makes the vehicle-mounted microwave oven highly practical, and at the same time, the filter plate will not generate EMC interference to the components in the electrical cavity, and the temperature rise rate of the related electronic components meets the requirements of the vehicle-mounted environment.

[0039] Preferably, a waveguide box 83 is arranged on the top of the heating chamber 6, one end of the waveguide box 83 extends into the electrical chamber 8, a magnetron 81 and a frequency conversion board 82 are arranged in the electrical chamber 8, and a fan assembly 7 is arranged on the rear side of the electrical chamber 8 for driving the airflow; the magnetron 81 is located on the upper side of the frequency conversion board 82 and is fixedly connected to the waveguide box 83, a filter plate 86 is arranged on the top of the heating chamber 6, and the filter plate 86 is located on the side of the heating chamber 6 away from the electrical chamber 8.

[0040] This arrangement can make full use of the internal space of the vehicle-mounted microwave oven, while preventing the filter board 86 from causing EMC signal interference to the frequency conversion board 82. No other electronic components are arranged between the fan assembly 7 and the frequency conversion board 82, ensuring that the vehicle-mounted microwave oven meets the temperature rise requirements under the extreme high temperature environment in summer, making it possible to further reduce the size of the vehicle-mounted microwave oven. As an example of the present utility model, a frequency conversion board bracket 85 is arranged at the bottom of the electrical cavity 8 for fixing and assembling the frequency conversion board 82.

[0041] like Figure 2-3 As shown, the housing 1 includes a top plate 11, and the top plate 11 includes a first flat plate 111. A relief portion 112 is arranged at the rear side of the first flat plate 111. The relief portion 112 is generally arc-shaped or stepped. This arrangement enables the vehicle-mounted microwave oven to adapt to the shape of the vehicle head cabinet, and the space utilization rate inside the vehicle head cabinet is high.

[0042] Preferably, the avoidance portion 112 includes a first vertical plate 1121 and a second flat plate 1122 connected to each other, the second flat plate 1122 is arranged lower than the first flat plate 111, the second flat plate 1122 is provided with a first inclined plate 1123 inclined downward at one end away from the first vertical plate 1121, the first inclined plate 1123 is provided with a second inclined plate 1124 at one end close to the fan assembly 7, and the inclination angles of the first inclined plate 1123 and the second inclined plate 1124 are α1 and α2 respectively, wherein 0<α1<α2<90° is set. This setting allows the power cord to pass through the first vertical plate 1121 that is first assembled to connect with the filter plate 86, which facilitates the disassembly, assembly and maintenance of the vehicle-mounted microwave oven.

[0043] Preferably, the housing 1 further comprises a first side plate 12 and a second side plate 13, wherein the first side plate 12 and the second side plate 13 are respectively located on both sides of the top plate 11, and the magnetron 81 is provided with a magnetron bracket 84 on a side close to the first side plate 12, and the magnetron bracket 84 is fixedly connected to the first side plate 12. This arrangement has a simple structure, and can further improve the assembly stability and reliability of the magnetron 81, and meet the service life in a vehicle-mounted environment. As an example of the present utility model, flanges are provided on both sides of the top plate 11, which are used to be fixedly connected to the first side plate 12 and the second side plate 13, respectively.

[0044] Preferably, the housing 1 further comprises a bottom plate 14, the heating chamber 6 is arranged on the bottom plate 14, the bottom plate 14 is partially raised on a side away from the heating chamber 6 to form a first raised portion 142, a furnace foot 141 is arranged in the first raised portion 142, and is used to be detachably connected to the bottom bracket 43. This arrangement can not only increase the mechanical strength of the bottom plate 14, but also make the furnace foot 141 have a certain height to ensure that it is connected and fastened to the bottom plate 14, and the height of the furnace foot 141 protruding from the bottom plate 14 is very limited, and the space utilization rate is high.

[0045] Preferably, the bottom plate 14 is provided with a second protruding portion 143 and a bent portion 144, the bent portion 144 is located on a side of the second protruding portion 143 away from the fan assembly 7, and an avoidance groove 146 is formed between the bent portion 144 and the second protruding portion 143 for limiting the retaining rib at the opening of the front cabinet. Preferably, side flanges 145 are provided on both sides of the bottom plate 14 for fixed assembly with the first side plate 12 and the second side plate 13.

[0046] like Figure 4-5As shown, the vehicle-mounted microwave oven also includes a door assembly 2, an opening is arranged on one side of the heating cavity 6, one side of the door assembly 2 is hingedly connected to the outer shell 1 for selectively blocking the opening, the door assembly 2 includes a connected door frame 22 and a door body 23, a U-shaped folded edge 231 and an ear plate 232 are arranged on the edge of the door body 23, there are multiple U-shaped folded edges 231 and they are arranged at intervals, the ear plate 232 is arranged between adjacent U-shaped folded edges 231 for fixed connection with the door frame 22, the maximum distance between the ear plate 232 and the U-shaped folded edge 231 and the door and window plate 21 is L1, L2, wherein L1<L2 is set.

[0047] This arrangement can hide the screws for fixing the door frame 22 and the door body 23 between adjacent U-shaped folds 231, thereby helping to reduce the thickness of the door assembly 2; at the same time, the ear plate 232 can further improve the shielding effect of the U-shaped fold 231 on microwaves.

[0048] Preferably, the door assembly 2 further includes a door and window plate 21 and a baffle 24, wherein the door and window plate 21 is located on a side of the door frame 22 away from the door body 23, and the baffle 24 is located on a side of the door body 23 away from the door frame 22, and the baffle 24 is detachably connected to the door body 23.

[0049] Preferably, the door body 23 further includes a reinforcing recess 233, which is located on a side of the ear plate 232 away from the U-shaped fold 231. This arrangement can provide additional support and connection points, increase the connection strength between the side wall of the door body 23 and the ear plate 232, and prevent the ear plate 232 from being damaged or falling off.

[0050] The vehicle-mounted microwave oven further includes an air guide cover 88 in communication with the heating cavity 6, the heating cavity 6 includes a cover plate 62 at the top, the air guide cover 88 is fixedly connected to the cover plate 62, and a filter assembly 3 is arranged at the outlet end of the air guide cover 88. This arrangement can filter the moisture, oil droplets, etc. generated in the heating cavity 6, ensuring that the air in the cockpit will not be polluted when heating food. The specific structure of the filter assembly 3 is prior art and will not be described in detail here.

[0051] like Figure 6-9 As shown, the vehicle-mounted microwave oven further comprises a connecting assembly 4, which comprises a first bracket 41 and a second bracket 42 located on both sides of the housing 1, and is used for being fixedly connected to the front cabinet of the vehicle; the connecting assembly 4 further comprises a bottom bracket 43, and the bottom bracket 43 is fixed in the front cabinet of the vehicle, and is used for being limitedly fixed with the bottom plate 14. This arrangement can fix the vehicle-mounted microwave oven in the horizontal and vertical directions, and has high assembly efficiency and good reliability.

[0052] like Figure 10-11As shown, the heating chamber 6 includes a front plate 63, and the front plate 63 is provided with a front plate flange 631 on a side close to the first side plate 12, and the first bracket 41 is provided on a side of the first side plate 12 away from the front plate flange 631, and the front plate flange 631 is provided with a fixing hole for simultaneously fixing the first side plate 12 and the first bracket 41. This setting uses one screw to simultaneously assemble the first side plate 12 and the first bracket 41, and the first side plate 12 can strengthen the front plate flange 631, and the first bracket 41 directly abuts against the side wall of the first side plate 12, so that the force of the vehicle-mounted microwave oven is more uniform.

[0053] As an example of the present invention, the bottom bracket 43 is partially recessed downward to form a guide groove 431, a notch 432 is provided at the end of the guide groove 431, a stopper 433 is provided on the side of the notch 432 close to the furnace foot 141, the projection of the stopper 433 on the horizontal plane is semicircular, and the stopper 433 includes a contraction part and an extension part, which are used to limit and fix the furnace foot 141. During assembly, the furnace foot 141 slides forward along the guide groove 431 to the notch 432, and is limited and fixed by the stopper 433 in the front side, left rear, and up and down directions.

[0054] Preferably, the bottom bracket 43 also includes a lower concave portion 434, in which a connection hole is provided, and the lowest point of the connection hole is in the same plane as the guide groove 431, for fixing and assembling with the front cabinet. This arrangement can increase the contact points between the bottom bracket 43 and the front cabinet, and the overall force is uniform and reliable, which can meet the installation requirements of the vehicle scene; at the same time, the bottom bracket 43 has a certain deformation space, and even if some bolts are loose, it can fit closely with the front cabinet to avoid abnormal noise.

[0055] Preferably, there are multiple lower concave portions 434 and they are symmetrically distributed on the left and right sides of the guide groove 431. This arrangement makes the force on both sides of the bottom bracket 43 uniform and prolongs the service life. Preferably, folding edges 435 are provided on both sides of the bottom bracket 43, and the folding edges 435 extend upward. This arrangement makes the two sides of the bottom bracket 43 have a certain height to facilitate gripping, and further increases its structural strength.

[0056] As an example of the present invention, the connection assembly 4 further includes a connection bracket 44, which is welded and fixed to the bottom of the heating chamber 6, and one side of the connection bracket 44 abuts against the front plate 63, and is used to be screwed and fixed to the bottom plate 14. This arrangement can avoid opening a hole in the heating chamber 6, and improve the assembly tightness and stability of the heating chamber 6 and the bottom plate 14.

[0057] Preferably, the connecting bracket 44 is in the shape of an elongated strip and has fixing plates 443 at both ends, which are used to be welded and fixed to the bottom surface of the heating chamber 6. A first folded edge 441 is provided on one side of the connecting bracket 44, and the first folded edge 441 is partially recessed upward to form a recessed portion 442; a weight-reducing hole 445 is provided on the connecting bracket 44, and a support plate 444 is provided in the weight-reducing hole 445, and the support plate 444 abuts against the bottom of the heating chamber 6. This arrangement can ensure that the connecting bracket 44 and the heating chamber 6 have multiple contact points to disperse the force, and at the same time, there is a gap or height difference between the connecting bracket 44 and the heating chamber 6, and space is reserved for the bolts used to assemble the bottom plate 14, so as to prevent the screws from directly contacting the heating chamber 6 and achieve good heat dissipation.

[0058] As an example of the present invention, the connecting bracket 44 is provided with a mounting hole 446 for screwing and assembling with the bottom plate 14. Preferably, the front plate 63 is provided with a front plate flange 631, and the front plate flange 631 part is on the same plane as the connecting bracket 44, and is used to cooperate with the connecting bracket 44 to fix the bottom plate 14 together.

[0059] The vehicle-mounted microwave oven further includes a control panel 5, which is located at one side of the door assembly 2, and a first air outlet 51 is provided at the side, top or bottom of the control panel 5, and the first air outlet 51 is communicated with the electrical cavity 8. This arrangement can discharge the heat in the electrical cavity 8 through the first air outlet 51, ensuring good heat dissipation in the electrical cavity 8.

[0060] As an example of the present invention, the heating chamber 6 includes a cavity rear plate 61, and a fan assembly 7 is arranged at a position corresponding to the cavity rear plate 61 and the electrical chamber 8. The fan assembly 7 includes a second fan 72 and a first fan 71 arranged in an upper and lower manner. The first fan 71 is located on the outer side of the cavity rear plate 61, and the second fan 72 is located on the inner side of the cavity rear plate 61.

[0061] Since the size of the electrical cavity 8 in the vehicle-mounted microwave oven is relatively small, a single fan is difficult to meet the heat dissipation requirements. The second fan 72 is used to blow air directly toward the magnetron 81, and the first fan 71 is used to blow air directly toward the frequency conversion board 82, so as to meet the heat dissipation requirements of the main components. The first fan 71 and the second fan 72 are respectively arranged on both sides of the cavity rear plate 61, so as to ensure that the distances between the first fan 71, the second fan 72 and the vehicle head cabinet are basically the same, so that they have similar wind pressures, and ensure that the operating power of the two and the size of the airflow blowing into the electrical cavity 8 are basically the same. At this time, the distance between the first fan 71 and the frequency conversion board 82 is relatively large, which can meet the temperature rise detection requirements in the microwave oven experimental verification.

[0062] like Figure 12-15As shown, the heating chamber 6 includes a cover plate 62, and a wave-transmitting plate 64 is bonded and fixed to the lower side of the cover plate 62. A filter bracket 87 and a filter plate 86 are arranged in sequence above the cover plate 62. The wave-transmitting plate 64 is connected to the cover plate 62 by fasteners, and is connected to the filter bracket 87 by snap-fitting.

[0063] By arranging the filter bracket 87 and the wave-transmitting plate 64 on the upper and lower sides of the cover plate 62 and performing specific connection and fixing, on the one hand, the relevant parts in the vehicle-mounted microwave oven are arranged more compactly, improving the space utilization rate of the vehicle-mounted microwave oven itself, and on the other hand, it is conducive to improving the connection strength of the relevant parts to avoid the separation or falling of the parts due to the bumps or vibrations of the vehicle. The wave-transmitting plate 64 can be made of PP. This arrangement allows the wave-transmitting plate 64 to be fixed by bonding, clamping, or screwing, making full use of the existing structure to ensure reliable connection and fastening.

[0064] As an example of the present invention, a clamping column 641 is provided on the wave-transmitting plate 64, and clamping grooves 643 are provided on both sides of the clamping column 641. A clamping groove 873 is provided on one side of the filter bracket 87. The clamping column 641 passes through the cover plate 62 and is clamped with the clamping groove 873. This arrangement can not only realize the rapid assembly of the filter bracket 87, but also realize the clamping assembly of the wave-transmitting plate 64 by using the filter bracket 87, so as to make up for the poor reliability of the conventional bonding method and meet the use requirements of the vehicle environment.

[0065] Preferably, a stud 642 is provided on the wave-transmitting plate 64, and the stud 642 is provided through the cover plate 62. A rubber pad 644 is provided on the outer edge of the stud 642, and the wave-transmitting plate 64 is fixedly connected to the cover plate 62 by screws. This arrangement enables the wave-transmitting plate 64 to be bonded and screwed to the cover plate 62 at the same time, and to be snap-connected to the filter bracket 87 at the same time, taking into account both the tightness and convenience of assembly, and the rubber pad 644 has a certain buffering effect to prevent abnormal noise from being generated after the screws are loosened.

[0066] As an example of the present utility model, the filter bracket 87 is provided with an assembly groove on the side away from the card slot 873, and the assembly groove is provided with a boss 876 on the side close to the cover plate 62. The boss 876 is provided with an assembly hole 871 for fixed connection with the edge of the cover plate 62. The filter bracket 87 is provided with an assembly column 872 and a support column 877. There are two assembly columns 872 and the connecting line between the assembly columns 872 and the support columns 877 forms a triangle for fixing the filter plate 86.

[0067] As an example of the present invention, filter brackets 87 are provided on both sides of the cover plate 62. This arrangement enables any filter bracket 87 to be provided with a filter plate 86, thereby improving the compatibility of related parts during the production and assembly process, so that one part can meet the assembly requirements of different models.

[0068] Preferably, the filter bracket 87 further includes a second flange 875 arranged to be tilted upward, and a shrinkage opening 874 is arranged on the second flange 875, and the shrinkage opening 874 is communicated with the card slot 873. This arrangement facilitates the assembly and fixation of the filter bracket 87 and the wave-transmitting plate 64, and at the same time, a gap is formed between the filter plate 86 and the cover plate 62, which is conducive to heat dissipation.

[0069] Preferably, the front plate 63 is provided with a front plate air outlet 632 at a position corresponding to the filter plate 86, and the front plate air outlet 632 is communicated with the electrical cavity 8. This arrangement enables the fan assembly 7 to drive air to flow not only to the first air outlet 51, but also to the front plate air outlet 632, thereby facilitating the heat dissipation of the filter plate 86.

[0070] The ratio of the air inlet and air outlet area of ​​the electrical cavity 8 is 1.5-3:1, the ratio of the air inlet and air outlet area of ​​the heating cavity 6 is 1.1-1.5:1, and the ratio of the air outlet area of ​​the electrical cavity to the air inlet area of ​​the heating cavity is 1.5-3:1. Preferably, the ratio of the air inlet and air outlet area of ​​the electrical cavity 8 is 1.7-2.4:1, the ratio of the air inlet and air outlet area of ​​the heating cavity 6 is 1.2-1.4:1, and the ratio of the air outlet area of ​​the electrical cavity 8 to the air inlet area of ​​the heating cavity 6 is 2.2-2.5:1. The air inlet area and air outlet area of ​​the heating cavity 6 are 1310mm2 and 972.4mm2 respectively, and the air inlet area and air outlet area of ​​the electrical cavity 8 are 6004.5mm2 and 3164.7mm2 respectively. The air inlet cover of the electrical cavity is also the total air inlet area of ​​the vehicle-mounted microwave oven. This arrangement maintains positive pressure in both the electrical cavity 8 and the heating cavity 6, ensuring good heat dissipation and anti-condensation effects of the vehicle-mounted microwave oven as a whole.

[0071] 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 vehicle-mounted microwave oven installed in a vehicle head cabinet, characterized in that: The vehicle-mounted microwave oven comprises a shell (1), a heating cavity (6) is arranged in the shell (1), an electrical cavity (8) is formed between the shell and the heating cavity (6), the electrical cavity (8) is located on one side of the heating cavity (6), a filter plate (86) is arranged on the top of the heating cavity (6), the filter plate (86) is located on the side of the heating cavity (6) away from the electrical cavity (8), the volume of the heating cavity (6) is V1, and the total volume of the vehicle-mounted microwave oven is V2, wherein V1=(0.35-0.45)*V2.

2. The vehicle-mounted microwave oven according to claim 1, characterized in that: A frequency conversion board (82) is arranged at the bottom of the electrical cavity (8); the heating cavity (6) comprises a cavity rear plate (61); a fan assembly (7) is arranged on the cavity rear plate (61) for blowing air into the electrical cavity (8); the fan assembly (7) comprises a first fan (71); and a minimum distance L1 between the first fan (71) and the frequency conversion board (82) is 10-15 cm.

3. The vehicle-mounted microwave oven according to claim 2, characterized in that: The fan assembly (7) comprises a second fan (72), wherein the second fan (72) is located above the first fan (71), and the first fan (71) and the second fan (72) are respectively located on the outer side and the inner side of the cavity rear plate (61).

4. The vehicle-mounted microwave oven according to claim 2, characterized in that: A waveguide box (83) is arranged on the top of the heating chamber (6), one end of the waveguide box (83) extends into the electrical chamber (8), a magnetron (81) is arranged in the electrical chamber (8), and the magnetron (81) is located on the upper side of the frequency conversion board (82) and is fixedly connected to the waveguide box (83).

5. The vehicle-mounted microwave oven according to claim 4, characterized in that: The housing (1) comprises a top plate (11), the top plate (11) comprises a first flat plate (111), a relief portion (112) is arranged on the rear side of the first flat plate (111), and the relief portion (112) is generally arc-shaped or stepped.

6. The vehicle-mounted microwave oven according to claim 5, characterized in that: The avoidance portion (112) comprises a first vertical plate (1121) and a second flat plate (1122) which are connected to each other; the second flat plate (1122) is arranged lower than the first flat plate (111); a first inclined plate (1123) inclined downward is arranged at an end of the second flat plate (1122) away from the first vertical plate (1121); a second inclined plate (1124) is arranged at an end of the first inclined plate (1123) close to the fan assembly (7); the inclination angles of the first inclined plate (1123) and the second inclined plate (1124) are α1 and α2 respectively, wherein 0°<α1<α2<90°.

7. The vehicle-mounted microwave oven according to claim 6, characterized in that: The housing (1) further comprises a first side plate (12) and a second side plate (13), wherein the first side plate (12) and the second side plate (13) are respectively located on two sides of the top plate (11), and a magnetron bracket (84) is provided on a side of the magnetron (81) close to the first side plate (12), and the magnetron bracket (84) is fixedly connected to the first side plate (12).

8. The vehicle-mounted microwave oven according to claim 1, characterized in that: The vehicle-mounted microwave oven further comprises an air guide hood (88) in communication with the heating cavity (6); the heating cavity (6) comprises a cover plate (62) located at the top; an air inlet is arranged on a side of the heating cavity (6) close to the electrical cavity (8); the air guide hood (88) is fixedly connected to the cover plate (62); and a filter assembly (3) is arranged at the outlet end of the air guide hood (88).

9. The vehicle-mounted microwave oven according to claim 1, characterized in that: The vehicle-mounted microwave oven further comprises a connection assembly (4), wherein the connection assembly (4) comprises a first bracket (41) and a second bracket (42) located on both sides of the housing (1) and used for being fixedly connected to a vehicle front cabinet; the connection assembly (4) further comprises a bottom bracket (43), wherein the bottom bracket (43) is fixed in the vehicle front cabinet and used for being fixedly positioned with the bottom plate (14).

10. The vehicle-mounted microwave oven according to claim 9, characterized in that: The heating chamber (6) comprises a front plate (63), a front plate flange (631) being arranged on a side of the front plate (63) close to the first side plate (12), the first bracket (41) being arranged on a side of the first side plate (12) away from the front plate flange (631), and a fixing hole being arranged on the front plate flange (631) for simultaneously fixing the first side plate (12) and the first bracket (41).

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