CN105387492B - Micro-wave oven - Google Patents

Abstract

The invention provides a microwave oven. The microwave oven has a cooking chamber and an electric chamber located behind the cooking chamber. The electric chamber is provided with a magnetron, a frequency converter assembly and a cooling fan. The frequency converter assembly includes: a mounting bracket, a mounting base, and a frequency converter circuit Plate and air guide cover, the installation bracket is installed on the bottom plate of the microwave oven; the installation base is installed obliquely on the installation bracket; Above the circuit board of the inverter, it is used to guide the cold air blown by the cooling fan to the circuit board of the inverter. The microwave oven provided by the invention not only solves the problem of insufficient installation space for the frequency converter circuit board, but also effectively controls the temperature rise of the frequency converter circuit board, thereby not only ensuring the reliability of the product, but also facilitating the miniaturization of the product; The two parts of the bracket and the installation base realize the oblique installation of the inverter circuit board, the structure is simple, and the mold making and maintenance are easy.

Description

Micro-wave oven

technical field

The invention relates to the field of kitchen utensils, and more specifically, to a microwave oven.

Background technique

Existing microwave ovens used in commercial places such as restaurants and convenience stores that require rapid heating usually use two or more frequency converters, and the frequency converters are installed at the original high-voltage transformer position, so as not to change the original structure as much as possible . However, due to the small installation space of microwave oven products and the large size of the inverter, the vertical installation of the inverter requires a large installation space, resulting in insufficient installation space for the inverter, which is not conducive to the miniaturization of the product; the horizontal placement of the inverter is not conducive to The heat dissipation of the inverter cools down, and the excessive temperature rise of the inverter will cause the performance of the inverter to decline.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art.

Therefore, the object of the present invention is to provide a microwave oven that not only solves the problem of insufficient installation space for the circuit board of the frequency converter, but also effectively controls the temperature rise of the circuit board of the frequency converter.

In order to achieve the above object, an embodiment of the present invention provides a microwave oven, the microwave oven has a cooking chamber and an electrical chamber located behind the cooking chamber, the electrical chamber is provided with a magnetron, a frequency converter assembly and a cooling fan, The frequency converter assembly includes: a mounting bracket, installed on the bottom plate of the microwave oven; a mounting base, obliquely mounted on the mounting bracket; a frequency converter circuit board, mounted on the mounting base, and relative to the microwave oven The bottom plate is arranged obliquely; and the wind guide cover is arranged above the frequency converter circuit board, and is used to guide the cold air blown by the cooling fan to the frequency converter circuit board.

In the microwave oven provided by the above-mentioned embodiments of the present invention, the frequency converter circuit board is installed on the mounting base placed obliquely, that is, the frequency converter circuit board is installed obliquely on the bottom plate of the microwave oven through the mounting bracket and the mounting base. It effectively reduces the height of the inverter circuit board, solves the problem of limited installation space and insufficient installation space for the inverter circuit board due to the small installation space of the microwave oven, makes the structure of the product more compact, and the height of the inverter circuit board Reduced, which is conducive to the miniaturization of the product; compared with the horizontally placed inverter circuit board, the cooling fan located above the inverter circuit board can effectively cool the inverter circuit board through the air guide cover located above the inverter circuit board. The temperature is lowered to avoid the problem of performance degradation of the inverter circuit board due to excessive temperature rise when the inverter circuit board is placed horizontally, ensuring the reliability of the product. In other words, the microwave oven provided by the present invention not only solves the problem of insufficient installation space for the circuit board of the frequency converter, but also effectively controls the temperature rise of the circuit board of the frequency converter by installing the circuit board of the frequency converter obliquely, thus ensuring the reliability of the product. It is also conducive to the miniaturization of the product; and the technical solution of tilting the inverter circuit board is realized by using two components, the mounting bracket and the mounting base. The structure is simple, and the mold making and maintenance are easy.

In addition, the microwave oven provided by the above embodiments of the present invention also has the following additional technical features:

According to an embodiment of the present invention, the front end of the air guide cover is provided with an air guide inlet opposite to the air outlet of the cooling fan, and the end of the air guide cover is provided with a hole in communication with the air guide inlet. Air outlet.

In the above embodiment, the air guide inlet on the air guide cover is set opposite to the air outlet of the cooling fan, so that the cold air blown by the cooling fan is directly blown to the circuit board of the inverter through the air guide inlet on the air guide cover, effectively cooling the inverter. The circuit board is cooled to ensure the cooling efficiency of the inverter circuit board, and the hot air after heat exchange by the inverter circuit board is blown out through the air guide outlet on the air guide cover.

According to an embodiment of the present invention, an air inlet passage is formed between the outer cover of the microwave oven and the side wall of the cooking cavity, and an air inlet connected to the air inlet passage is opened on the bottom plate of the microwave oven. The air suction port of the cooling fan faces the air inlet channel.

In the above-mentioned embodiment, the air inlet of the cooling fan is set towards the air inlet channel, so that the external low-temperature air is sucked into the air inlet channel formed between the outer cover and the side wall of the cooking cavity from the air inlet, and then passes through the cooling fan, and then flows from the air inlet of the cooling fan. The air outlet blows to the inverter circuit board. Since the air guide inlet on the air guide cover is facing the air outlet of the cooling fan, low-temperature air enters the air guide cover to cool the inverter circuit board under the air guide cover. The hot air after the heat exchange of the inverter circuit board is blown out through the air guide outlet on the air guide cover to effectively cool down the inverter circuit board.

According to an embodiment of the present invention, the wind guide cover includes two opposite side plates and a cover plate connected to the two side plates, the front end of the cover plate is provided with the air guide inlet, and the The plate surface of the cover plate is gradually inclined upwards from the back to the front.

In the above embodiment, the surface of the cover plate of the air guide hood is gradually inclined upwards from the back to the front, that is, the air guide inlet on the cover plate gradually expands outwards, expanding the area of the air guide inlet, thereby increasing the air guide inlet. The air volume of the inlet entering the air guide hood, and along the flow direction of the wind in the air guide hood, the surface of the cover plate is gradually inclined downward, which is conducive to improving the flow direction of the wind, so that the wind directly blows to the air below the air guide hood. Inverter circuit board, thus improving the cooling effect on the inverter circuit board.

According to an embodiment of the present invention, the rear panel of the microwave oven is provided with an air outlet connected to the air guide outlet, so that the hot air after heat exchange on the circuit board of the frequency converter is blown out of the air guide cover through the air guide outlet. After that, it is exhausted to the outside of the microwave oven through the exhaust port on the rear panel of the microwave oven.

According to an embodiment of the present invention, the installation bracket is provided with a guide slope that gradually slopes downward from front to back, and the installation base is supported on the guide slope.

According to an embodiment of the present invention, the end of the guide slope is provided with an upwardly extending undercut, the end of the installation base is against the undercut, and the end of the installation base is provided with a Lugs that move the base left and right.

In the above-mentioned embodiment, the installation base is supported on the guide slope of the installation bracket, and through the undercut on the guide slope and the bump on the installation base, the position limiting effect on the installation base is realized to ensure that the installation base is on the installation bracket The firmness of the installation; and the installation bracket and the installation base are used to realize the technical solution of the inclined installation of the inverter circuit board. The structure is simple, and the mold making and maintenance are easy.

According to an embodiment of the present invention, the installation base is formed with an installation groove with an open upper end, the frequency converter circuit board is located in the installation groove, the wind guide cover is installed above the installation base, and The installation base is clamped.

In the above embodiments, the inverter circuit board is installed in the installation groove formed on the installation base to ensure the firmness of the installation of the inverter circuit board; the air guide cover is installed above the installation base by clamping, which has a simple structure and is firmly fixed .

According to an embodiment of the present invention, the electrical chamber is provided with a plurality of magnetrons, a plurality of frequency converter components, and a device for cooling the temperature of the plurality of magnetrons and the frequency converter components. multiple cooling fans.

According to an embodiment of the present invention, the upper and lower parts of the electrical chamber are respectively provided with a magnetron, the two sides of the magnetron located in the upper part are respectively provided with a cooling fan, and the magnetron located in the lower part The two sides of the control tube are respectively provided with a frequency converter assembly.

Additional aspects and advantages of the invention will become apparent in the description which follows, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic diagram of a partial three-dimensional structure of a microwave oven according to an embodiment of the present invention;

Fig. 2 is a front structural schematic view of the inverter assembly in the microwave oven shown in Fig. 1;

FIG. 3 is a schematic diagram of an exploded structure of the inverter assembly in the microwave oven shown in FIG. 1 .

Wherein, the corresponding relationship between reference numerals and component names in Fig. 1 to Fig. 3 is:

10 Cooking cavity, 11 Electric chamber, 12 Magnetron, 13 Inverter component, 131 Mounting bracket, 1311 Guide slope, 1312 Undercut, 132 Mounting base, 1321 Bulge, 1322 Mounting groove, 1323 Buckle, 133 Inverter circuit Plate, 134 Air guide cover, 1341 Air guide inlet, 1342 Air guide outlet, 1343 Side plate, 1344 Cover plate, 1345 Card hole, 14 Cooling fan, 15 Bottom plate, 151 Air inlet, 16 Air inlet channel, Figure 1 and Figure 2 The thick arrows in indicate the direction of air flow.

detailed description

In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways than described here. Therefore, the protection scope of the present invention is not limited by the specific implementation disclosed below. Example limitations.

Hereinafter, microwave ovens according to some embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in Fig. 1 , a microwave oven provided according to some embodiments of the present invention has a cooking chamber 10 and an electrical chamber 11 located behind the cooking chamber 10, and the electrical chamber 11 is provided with a magnetron 12 and a frequency converter assembly. 13 and cooling fan 14.

Wherein, the frequency converter assembly 13 includes: a mounting bracket 131 , a mounting base 132 , a frequency converter circuit board 133 and a windshield 134 .

Specifically, the mounting bracket 131 is installed on the bottom plate 15 of the microwave oven;

The installation base 132 is obliquely installed on the installation bracket 131;

The inverter circuit board 133 is installed on the installation base 132, and is inclined relative to the bottom plate 15 of the microwave oven;

The air guide cover 134 is disposed above the inverter circuit board 133 and is used to guide the cold air blown out by the cooling fan 14 to the inverter circuit board 133 .

In the microwave oven provided by the above-mentioned embodiments of the present invention, the frequency converter circuit board 133 is installed on the installation base 132 placed obliquely, that is, the frequency converter circuit board 133 is installed obliquely on the microwave oven bottom plate 15 through the installation bracket 131 and the installation base 132, and is vertically aligned with the microwave oven. Compared with placing the frequency converter circuit board 133, the height of the frequency converter circuit board 133 is effectively reduced, and the problem of limited installation space and insufficient installation space of the frequency converter circuit board 133 due to the small installation space of the microwave oven is solved, making the structure of the product more compact. Compact, and the reduction of the height of the frequency converter circuit board 133 is beneficial to the miniaturization of the product; compared with the horizontally placed frequency converter circuit board 133, the cooling fan 14 located above the frequency converter circuit board 133 can pass through the frequency converter circuit board 133 The air guide cover 134 above 133 is used to effectively cool down the frequency converter circuit board 133, avoiding the problem of performance degradation of the frequency converter circuit board 133 caused by excessive temperature rise when the frequency converter circuit board 133 is placed horizontally, and ensuring the work of the product reliability. In other words, the microwave oven provided by the present invention not only solves the problem of insufficient installation space for the frequency converter circuit board 133, but also effectively controls the temperature rise of the frequency converter circuit board 133 by installing the frequency converter circuit board obliquely, thereby ensuring that the product works The reliability is high, and it is beneficial to the miniaturization of the product; and the installation bracket 131 and the installation base 132 are used to realize the technical solution of the oblique installation of the inverter circuit board 133, the structure is simple, and the mold making and maintenance are easy.

In some embodiments of the present invention, as shown in FIG. 1 and FIG. 3 , the front end of the air guide cover 134 is provided with an air guide inlet 1341 opposite to the air outlet of the cooling fan 14, and the end of the air guide cover 134 is provided with a The air inlet 1341 is connected with the air guiding outlet 1342 .

In the above embodiment, the air guide inlet 1341 on the air guide cover 134 is set opposite to the air outlet of the cooling fan 14, so that the cold air blown by the cooling fan 14 is directly blown to the frequency converter through the air guide inlet 1341 on the air guide cover 134 The circuit board 133 effectively cools the frequency converter circuit board 133, ensuring the efficiency of cooling the frequency converter circuit board 133. The hot air after the heat exchange of the frequency converter circuit board 133 is blown out through the air guide outlet 1342 on the air guide cover 134, As shown by the thick line arrow in Fig. 2, it indicates the flow direction of the air.

Further, as shown in Figure 1, an air inlet channel 16 is formed between the outer cover (not shown) of the microwave oven and the side wall of the cooking cavity 10, and a hole communicating with the air inlet channel 16 is provided on the bottom plate 15 of the microwave oven. The air inlet 151 , the air suction port of the cooling fan 14 faces the air inlet channel 16 .

In the above-described embodiment, the air inlet of the cooling fan 14 is set toward the air inlet channel 16, so that the external low-temperature air is sucked from the air inlet 151 into the air inlet channel 16 formed between the outer cover and the side wall of the cooking cavity 10, and then passed through the cooling fan 14 Finally, it blows to the frequency converter circuit board 133 from the air outlet of the cooling fan 14, because the air guide inlet 1341 on the air guide cover 134 is facing the air outlet of the cooling fan 14, the low-temperature air enters in the air guide cover 134, and is positioned at the wind guide. The frequency converter circuit board 133 below the cover 134 is cooled down, and the hot air after the heat exchange of the frequency converter circuit board 133 is blown out through the air guide outlet 1342 on the air guide cover 134, as shown by the thick line arrow in Fig. The flow direction of the inverter circuit board 133 can be effectively cooled.

In a specific embodiment of the present invention, as shown in Fig. 2 and Fig. 3, the wind deflector 134 includes two opposite side plates 1343 and a cover plate 1344 connected to the two side plates 1343, and the front end of the cover plate 1344 is provided with The air guide inlet 1341, and the surface of the cover plate 1344 is gradually inclined upward from the rear to the front.

In the above-mentioned embodiment, the plate surface of the cover plate 1344 of the air guide cover 134 is gradually inclined upwards from the rear to the front, that is, the air guide inlet 1341 on the cover plate 1344 gradually expands outward, expanding the area of the air guide inlet 1341, thereby increasing The air volume that enters the air guide hood 134 by the air guide inlet 1341 is increased, and along the flow direction of the wind in the air guide cover 134, the plate surface of the cover plate 1344 is gradually inclined downward, which is conducive to improving the flow direction of the wind, so that the wind Directly blow on the frequency converter circuit board 133 located under the wind guide cover 134 , thereby improving the cooling effect on the frequency converter circuit board 133 .

Further, the rear panel (not shown in the figure) of the microwave oven is provided with an air outlet connected to the air guide outlet 1342, so that the hot air after heat exchange by the frequency converter circuit board 133 is blown out through the air guide outlet 1342. After the cover 134, it is discharged to the outside of the microwave oven by the air outlet on the back panel of the microwave oven.

In some embodiments of the present invention, as shown in FIG. 2 and FIG. 3 , the installation bracket 131 is provided with a guide slope 1311 that gradually slopes downward from front to back, and the installation base 132 is supported on the guide slope 1311 .

Further, as shown in FIG. 1 and FIG. 3 , the end of the guide slope 1311 is provided with an upwardly extending undercut 1312 , the end of the installation base 132 is against the undercut 1312 , and the end of the installation base 132 is provided for limiting the installation base. 132 bump 1321 that moves left and right.

In the above-mentioned embodiment, the installation base 132 is supported on the guide slope 1311 of the installation bracket 131, and through the undercut 1312 provided on the guide slope 1311 and the bump 1321 on the installation base 132, the position-limiting effect on the installation base 132 is realized. , to ensure the firmness of the mounting base 132 installed on the mounting bracket 131; and the technical solution of using the mounting bracket 131 and the mounting base 132 to realize the oblique installation of the frequency converter circuit board 133 has a simple structure and is easy to make and maintain.

In one embodiment of the present invention, as shown in FIG. 3 , an installation groove 1322 with an open upper end is formed on the installation base 132 , the frequency converter circuit board 133 is located in the installation groove 1322 , and the wind guide cover 134 is installed above the installation base 132 . And clamped with the installation base 132 .

Specifically, as shown in FIG. 3 , buckles 1323 are provided on the side wall of the installation slot 1322 of the installation base 132 , and a buckle 1345 is provided on the side plate 1343 of the air guide cover 134 , and the buckle 1323 is buckled in the buckle 1345 Inside.

In the above embodiment, the inverter circuit board 133 is installed in the installation groove 1322 formed on the installation base 132 to ensure the firmness of the installation of the inverter circuit board 133; , simple in structure and firmly fixed.

In some embodiments of the present invention, the electrical room 11 is provided with multiple magnetrons 12, multiple frequency converter components 13 and multiple cooling fans for cooling the multiple magnetrons 12 and multiple frequency converter components 13 14.

In a specific embodiment of the present invention, as shown in Figure 1, a magnetron 12 is respectively provided on the upper and lower parts of the electrical chamber 11, and a cooling fan 14 is respectively provided on both sides of the magnetron 12 located at the upper part, and a cooling fan 14 is provided at the lower part. The two sides of the magnetron 12 are respectively provided with a frequency converter assembly 13 .

Specifically, the cooling fan 14 is provided with two or more air outlets, one of which is facing the air guide inlet 1341 on the air guide cover 134, and the cold air blown from the air outlet is used to cool the inverter circuit plate 133, the second air outlet communicates with the magnetron 12, and the cold air blown out from the air outlet is used to cool the magnetron 12, thus the simultaneous cooling of the magnetron 12 and the frequency converter assembly 13 can be realized Purpose.

To sum up, in the microwave oven provided by the embodiment of the present invention, the frequency converter circuit board is installed on the inclined installation base, that is, the frequency converter circuit board is installed obliquely on the bottom plate of the microwave oven through the installation bracket and the installation base. The air guide cover above the circuit board can effectively guide the wind to cool down the circuit board of the frequency converter, which not only solves the problem of insufficient installation space for the circuit board of the frequency converter, but also effectively controls the temperature rise of the circuit board of the frequency converter, thus ensuring the operation of the product The reliability is high, and it is also conducive to the miniaturization of the product; and the technical scheme of tilting the inverter circuit board is realized by using two parts, the mounting bracket and the mounting base, the structure is simple, and the mold making and maintenance are easy.

In the description of the present invention, the term "plurality" means two or more.

In the description of this specification, unless otherwise specified or explained, the terms "connection", "installation" and so on should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection , or electrical connection; it can be directly connected or indirectly connected through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the description of this specification, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right" etc. are based on the orientation shown in the drawings Or positional relationship is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or unit must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation of the present invention.

In the description of this specification, descriptions of the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in the present invention In at least one embodiment or example of . In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (8)

1. a kind of micro-wave oven, the micro-wave oven has cooking cavity and the electric panel room positioned at the cooking cavity rear, the electric panel room It is interior to be provided with magnetron, frequency converter assembly and cooling fan, it is characterised in that the frequency converter assembly includes：

Mounting bracket, on the bottom plate of the micro-wave oven；

Mounting seat, it is tiltedly mounted in the mounting bracket；

Converter circuit plate, it is obliquely installed in the mounting seat, and relative to the bottom plate of the micro-wave oven；With

Wind scooper, cover above the converter circuit plate, the cold wind for the cooling fan to be blown out is guided to described Converter circuit plate；

The front end of the wind scooper offers the wind guiding inlet being oppositely arranged with the air outlet of the cooling fan, the wind scooper End offer be connected with the wind guiding inlet wind-guiding outlet；

The wind scooper includes two side plates being oppositely arranged and the cover plate being connected with two side plates, and the front end of the cover plate is opened Provided with the wind guiding inlet, and the plate face of the cover plate is gradually inclined upwardly from the front to the back.

2. micro-wave oven according to claim 1, it is characterised in that

Formed with air intake passage between the side wall of the outer cover of the micro-wave oven and the cooking cavity, opened on the bottom plate of the micro-wave oven Provided with the air inlet being connected with the air intake passage, the inlet scoop of the cooling fan is towards the air intake passage.

3. micro-wave oven according to claim 1, it is characterised in that

The exhaust outlet being connected with wind-guiding outlet is offered in the back plate of the micro-wave oven.

4. micro-wave oven according to claim 1, it is characterised in that

The mounting bracket is provided with from the front to the back inclined guiding surface gradually downward, and the mounting seat is supported on described lead To on inclined-plane.

5. micro-wave oven according to claim 4, it is characterised in that

The end of the guiding surface is provided with the back-off upwardly extended, and the end of the mounting seat is against on the back-off, and The end of the mounting seat is provided with the projection for being used for limiting the mounting seat side-to-side movement.

6. micro-wave oven according to claim 5, it is characterised in that

Mounting groove formed with upper end open in the mounting seat, the converter circuit plate are located in the mounting groove, institute State wind scooper be arranged on the mounting seat top, and with the mounting seat clamping.

7. micro-wave oven according to any one of claim 1 to 6, it is characterised in that

Multiple magnetrons, multiple frequency converter assemblies are provided with the electric panel room and for multiple magnetrons and Multiple cooling fans of multiple frequency converter assembly coolings.

8. micro-wave oven according to claim 7, it is characterised in that

The upper and lower part of the electric panel room is respectively equipped with a magnetron, the both sides difference of the superposed magnetron Provided with a cooling fan, a frequency converter assembly is respectively equipped with positioned at the both sides of the magnetron of bottom.