Micro-steaming and baking all-in-one machine

Abstract

The utility model relates to the technical field of cooking utensils, and provides a micro-steaming and baking all-in-one machine. The micro-steaming and baking all-in-one machine comprises a magnetron, a frequency converter and a cooling fan, the magnetrons and the frequency converters are arranged at intervals in the first direction and are arranged at intervals in the second direction relative to the cooling fan, and the first direction and the second direction are arranged at an angle. A heat dissipation air duct is arranged between one of the magnetron and the frequency converter and the air outlet of the heat dissipation fan, and the heat dissipation air duct can guide part of airflow flowing through the air outlet to a first direction; and the other one of the magnetron and the frequency converter is arranged close to the air outlet of the cooling fan and is positioned on an airflow path of the air outlet. According to the micro-steaming and baking all-in-one machine, a single heat dissipation structure can be adopted to meet the requirement for simultaneous heat dissipation of the magnetron and the frequency converter, much assembly space does not need to be occupied, and the structure is more compact.

Description

Technical Field

[0001] The present application relates to the technical field of cooking appliances, and in particular to a microwave oven with steam and oven. Background Art

[0002] A microwave oven with steamer and oven is a kitchen appliance that integrates a microwave oven, steamer, oven and other kitchen appliances to achieve multi-purpose cooking. It not only saves kitchen space, but also makes food cooking more fun and more diverse in taste. However, due to the need to integrate the above three functions, the microwave oven with steamer and oven has many corresponding parts, and the reasonable layout of the corresponding parts needs to be considered to ensure the installation stability and safety of each part.

[0003] Taking the variable frequency microwave system as an example, the settings of the magnetron and inverter need to consider the heat dissipation requirements. If the heat dissipation is insufficient and untimely, the temperature rise of the magnetron anode and inverter components may exceed the standard, which is more likely to cause damage to the magnetron and inverter. Therefore, a heat dissipation structure needs to be installed in the microwave oven, which will inevitably lead to the need to occupy a certain assembly space. Therefore, how to set up a heat dissipation structure to ensure timely and effective heat dissipation of the magnetron and inverter while not occupying too much assembly space and ensuring a compact structure has become a technical problem that major manufacturers need to solve urgently. Utility Model Content

[0004] Based on this, it is necessary to provide a microwave oven with steamer, which can use a single heat dissipation structure to meet the simultaneous heat dissipation of the magnetron and the inverter, without taking up more assembly space and with a more compact structure.

[0005] A microwave oven, comprising a magnetron, a frequency converter and a cooling fan; the magnetron and the frequency converter are arranged at intervals along a first direction, and are arranged at intervals along a second direction relative to the cooling fan, and the first direction and the second direction are arranged at an angle; a cooling air duct is arranged between one of the magnetron and the frequency converter and the air outlet of the cooling fan, and the cooling air duct can guide part of the airflow passing through the air outlet to the first direction; the other of the magnetron and the frequency converter is arranged close to the air outlet of the cooling fan and is located on the airflow path of the air outlet.

[0006] It is understandable that the spacing arrangement of the magnetron and the inverter makes them not interfere with each other during assembly, and reduces the mutual influence of heat generated by the two during operation; and, both are arranged relative to the cooling fan, so that the assembly space along the first direction can be transferred to the second direction, improving the rationality of the spatial layout, and there is no need to occupy too much space in a single direction. On this basis, since one of the magnetron and the inverter is directly close to the air outlet of the cooling fan, the air flow flowing through the air outlet of the cooling fan can be directly used for heat dissipation, and the other is connected to the air outlet of the cooling fan through the cooling air duct, and the cooling air duct is used to change the flow direction of part of the gas flowing through the cooling fan, so that it is transferred to the first direction and avoids the other. With such a setting, there is no need to set up heat dissipation structures for the magnetron and the inverter respectively. By adjusting the spatial layout between the magnetron, the inverter and the heat dissipation structure, and coordinating with the setting of the heat dissipation air duct, multiple heat dissipation of a single heat dissipation structure can be achieved; and, such a setting reduces the assembly space of the three, and also reduces the problem of adding redundant guide structures, and the structure is more compact and small.

[0007] In some embodiments, the magnetron has heat dissipation fins, the heat dissipation fins are arranged close to the air outlet of the heat dissipation fan, and the heat dissipation fan is connected to the inverter through the heat dissipation air duct.

[0008] In some embodiments, the microwave oven and steamer also includes an air guide cover, which is connected between the cooling fan and the inverter, and the air guide cover is arranged to form the cooling air duct; the cooling air duct has an air flow inlet and an air flow outlet, and the caliber of the air flow inlet is smaller than the caliber of the air flow outlet.

[0009] In some embodiments, the air guide cover has a first side wall and a second side wall, the first side wall and the second side wall are arranged opposite to each other along a second direction, and the distance between the two gradually increases from the magnetron toward the inverter, the second side wall is arranged close to the cooling fan, and the second side wall is inclined.

[0010] In some embodiments, the first side wall includes a straight section, a vertical section, and an inclined section connected between the straight section and the vertical section, the straight section is arranged close to the magnetron, and a warped section is connected to a side of the straight section away from the inclined section, and the warped section is inclined toward the cooling fan.

[0011] In some of the embodiments, the air guide cover also has a third side wall and a fourth side wall, the third side wall and the fourth side wall are arranged opposite to each other and spaced apart along a third direction, and the two are parallel or tending to be parallel, and the third side wall and the fourth side wall are both connected to the first side wall and the second side wall; wherein the first direction, the second direction and the third direction are arranged at angles to each other.

[0012] In some embodiments, the inverter includes a main body and a bracket supported by the main body, and one end of the air guide cover facing away from the cooling fan is connected to the bracket.

[0013] In some embodiments, the bracket is constructed with a first assembly flange on one side of the magnetron along the first direction, and the air guide cover is provided with a second assembly flange at the airflow outlet of the heat dissipation duct, and the second assembly flange is pressed on the first assembly flange and snap-fitted.

[0014] In some embodiments, the microwave oven further comprises an assembly shell having an assembly cavity; the assembly shell comprises a side plate and a back plate, the side plate and the back plate are connected and arranged at an angle, the cooling fan, the magnetron and the inverter are integrated and assembled at the intersection of the side plate and the back plate, and the cooling fan is installed on the side plate;

[0015] The side plate is configured with a plurality of air inlet holes arranged at intervals at the air inlet of the cooling fan, and the back plate is configured with a plurality of air outlet holes arranged at intervals at a position close to the magnetron and the inverter.

[0016] In some embodiments, the microwave oven and steamer further includes a waveguide, and the magnetron is installed on the waveguide; and / or the microwave oven and steamer further includes a fan bracket, and the fan bracket is snap-fitted with the cooling fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A first partial schematic diagram of a microwave oven provided by an embodiment of the present application;

[0019] Figure 2 A partial rear view of a microwave oven provided in an embodiment of the present application;

[0020] Figure 3 A second partial schematic diagram of a microwave oven provided by an embodiment of the present application;

[0021] Figure 4 A schematic diagram of an air guide cover in a microwave oven provided in an embodiment of the present application;

[0022] Figure 5for Figure 3 A partial enlarged view of the middle A;

[0023] Figure 6 A schematic diagram of a microwave oven with steamer provided in one embodiment of the present application.

[0024] Figure numerals: 10, magnetron; 11, cooling fins; 12, assembly frame; 20, inverter; 21, main body; 22, bracket; 30, cooling fan; 40, air guide cover; 41, first side wall; 42, second side wall; 43, third side wall; 45, second assembly flange; 50, assembly shell; 51, side panel; 52, back panel; 60, fan bracket; 61, clamping arm; 221, first assembly flange; 401, cooling air duct; 402, air flow inlet; 403, air flow outlet; 411, straight section; 412, vertical section; 413, inclined section; 414, warped section; 601, accommodating groove; 5101, air inlet; 5201, air outlet. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0026] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0030] In the related art, since there are many corresponding parts in the microwave oven, it is necessary to consider the overall reasonable layout of the space to ensure the installation stability and safety of each part; and for the magnetron and inverter in the variable frequency microwave system, the heat dissipation performance needs to be considered. If the heat dissipation does not meet the requirements, it is easy to cause the temperature rise of the magnetron anode and the inverter components to exceed the standard and be damaged. Therefore, the assembly of the heat dissipation structure needs to meet the heat dissipation of the magnetron and inverter while not occupying too much assembly space to ensure the rationality of the space layout.

[0031] In this regard, Figures 1 to 6 As shown, a microwave oven, steamer and oven provided in one embodiment of the present application can integrate a microwave oven, a steamer and an oven into one, so as to realize multiple uses of one machine; moreover, it can meet the simultaneous heat dissipation of the magnetron 10 and the inverter 20, does not need to occupy much assembly space, and has a more compact and small structure.

[0032] See also Figures 1 to 3 Specifically, the microwave oven includes a magnetron 10, a frequency converter 20 and a cooling fan 30. The magnetron 10 and the frequency converter 20 are arranged at intervals along a first direction, and are arranged at intervals relative to the cooling fan 30 along a second direction. The first direction and the second direction form an angle. A cooling air duct 401 is provided between one of the magnetron 10 and the frequency converter 20 and the air outlet of the cooling fan 30. The cooling air duct 401 can guide part of the airflow passing through the air outlet to the first direction; and the other of the magnetron 10 and the frequency converter 20 is provided close to the air outlet of the cooling fan 30 and is located on the airflow path of the air outlet.

[0033] The first direction is the Z-axis direction, the second direction is the X-axis direction, and the third direction is the Y-axis direction.

[0034] It is understandable that the spacing arrangement of the magnetron 10 and the inverter 20 prevents the two from interfering with each other during assembly and reduces the mutual influence of heat generated by the two during operation; and both are spaced relative to the cooling fan 30, which can transfer the assembly space along the first direction to the second direction, improve the rationality of the spatial layout, and do not need to occupy too much space in a single direction. Since the cooling fan 30 is spaced relative to the magnetron 10 or the inverter 20 along the second direction, the gas flowing through the cooling fan 30 flows along the second direction. Therefore, when one of the magnetron 10 and the inverter 20 is directly arranged near the air outlet of the cooling fan 30, it is equivalent to setting it on the air flow path flowing through the air outlet. The gas flowing out through the air outlet under the action of the cooling fan 30 can directly act on the nearby magnetron 10 or the inverter 20 to achieve heat dissipation and improve the timeliness and effectiveness of heat dissipation. At the same time, the other of the magnetron 10 and the inverter 20 is connected through the heat dissipation duct 401 and the air outlet of the heat dissipation fan 30. The setting of the heat dissipation duct 401 can ensure that the magnetron 10 and the inverter 20 have a sufficient assembly distance in the first direction, and the gas flowing through the heat dissipation fan 30 can change its flow direction through the heat dissipation duct 401 and transfer it to the first direction to achieve heat dissipation of the inverter 20 or the magnetron 10; and the heat dissipation duct 401 has a converging effect on the gas, avoiding the dispersion of excess heat dissipation airflow, ensuring that it fully and timely acts on the inverter 20 or the magnetron 10.

[0035] With such a setting, there is no need to set up heat dissipation structures for the magnetron 10 and the frequency converter 20 respectively. By adjusting the spatial layout between the magnetron 10, the frequency converter 20 and the heat dissipation structure and cooperating with the setting of the heat dissipation duct 401, heat dissipation in multiple places of a single heat dissipation structure can be achieved. Moreover, precisely because one of them can be set close to the heat dissipation fan 30, the assembly space of the three is reduced, and the problem of occupying more space due to adding multiple guide structures is reduced. The structure is also more compact and small, and is less constrained by space. Therefore, the microwave oven and steamer of this embodiment can meet the simultaneous heat dissipation of the magnetron 10 and the frequency converter 20 by using a single heat dissipation structure, which not only realizes multiple uses of one thing, improves the timeliness and effectiveness of heat dissipation, but also reduces the occupied assembly space and meets the reasonable space layout.

[0036] Please continue reading Figures 1 to 3, exemplarily, the magnetron 10 has a heat dissipation fin 11, which is arranged near the air outlet of the heat dissipation fan 30, and the heat dissipation fan 30 is connected to the inverter 20 through the heat dissipation duct 401. The heat dissipation fin 11 is used to dissipate heat from the magnetron 10, increasing the contact area with the airflow and improving the heat dissipation effect. The magnetron 10 is located above the inverter 20 along the Z axis, and the inverter 20 uses the heat dissipation duct 401 to guide part of the airflow flowing through the heat dissipation fan 30 for heat dissipation, and the other part of the airflow will directly flow to the heat dissipation fin 11 of the magnetron 10 to achieve heat dissipation.

[0037] In some specific embodiments, the microwave oven further includes a waveguide, and the magnetron 10 is installed on the waveguide. At the same time, there is an assembly frame 12 on the outside of the magnetron 10 for easy assembly. The distance between the magnetron 10 and the air outlet of the cooling fan 30 along the second direction should not be too small. If it is too small, it may affect the operation of the cooling fan 30, and the vibration of the cooling fan 30 during operation is more likely to be transmitted to the magnetron 10, resulting in stability problems; of course, the distance between the two should not be too large. If it is too large, it will increase the flow path of the gas, indicating that part of the gas cannot be directly blown to the cooling fins 11, weakening the heat dissipation effect, and the heat dissipation is not timely enough. In actual use, the distance between the magnetron 10 and the cooling fan 30 along the second direction accounts for 3%-7% of the width of the magnetron 10 along the second direction, for example, it can be 3%, 5% or 7%.

[0038] In an optional embodiment, the distance between the magnetron 10 and the cooling fan 30 along the second direction is between 4 mm and 15 mm, for example, may be 4 mm, 8 mm, 12 mm or 15 mm.

[0039] Please combine Figures 1 to 4 In an optional embodiment, the microwave oven further includes an air guide cover 40, which is connected between the heat dissipation fan 30 and the frequency converter 20. The air guide cover 40 is arranged to form a heat dissipation duct 401 to achieve the diversion and drainage of gas. The heat dissipation duct 401 has an airflow inlet 402 and an airflow outlet 403. The airflow inlet 402 faces the heat dissipation fan 30, and the airflow outlet 403 faces the frequency converter 20. The diameter of the airflow inlet 402 is smaller than the diameter of the airflow outlet 403. The small-diameter airflow inlet 402 reduces the size of the heat dissipation duct 401 toward the heat dissipation fan 30, which is convenient for being installed at the air outlet of the heat dissipation fan 30 at the same time as the magnetron 10; and the large-diameter airflow outlet 403 increases the airflow volume flowing to the frequency converter 20, thereby improving the heat dissipation effect.

[0040] like Figure 4As shown, specifically, the air guide cover 40 is arranged in a trumpet shape. The air guide cover 40 has a first side wall 41 and a second side wall 42, which are arranged opposite to each other along the second direction, and the distance between the two along the second direction gradually increases from the magnetron 10 toward the inverter 20 to increase the cross-section of the air guide cover 40, thereby increasing the air flow. The second side wall 42 is arranged close to the cooling fan 30, and the second side wall 42 is inclined relative to the Z axis to avoid the lower part of the cooling fan 30. Such a setting not only utilizes the gas flow, but also is more conducive to the spatial layout.

[0041] Further, the first side wall 41 includes a straight section 411, a vertical section 412, and an inclined section 413 connected between the straight section 411 and the vertical section 412. The straight section 411 is arranged close to the magnetron 10, and the side of the vertical section 412 away from the inclined section 413 is connected to the inverter 20. The straight section 411 is along the horizontal direction, and the vertical section 412 is along the vertical direction (i.e., the Z-axis direction). The connection between the straight section 411 and the inclined section 413, and the connection between the vertical section 412 and the inclined section 413 are all rounded transitions, which is conducive to the flow of air. The setting of the inclined section 413 is used to change the gas flow direction, adjust the airflow along the X-axis direction to flow along the Z-axis direction, and the straight section 411 and the vertical section 412 are both diverted in the corresponding X-axis direction and Z-axis direction. Among them, the straight section 411 is connected to the side away from the inclined section 413 with a warped section 414, and the warped section 414 is tilted upward toward the cooling fan 30 to increase the flow cross-section of the cooling air duct 401 at the airflow inlet 402 to divert more airflow and improve the cooling effect.

[0042] Furthermore, the air guide cover 40 also has a third side wall 43 and a fourth side wall (not shown in the figure), and the third side wall 43 and the fourth side wall are arranged opposite to each other and spaced apart along the third direction, and the two are parallel or tend to be parallel. The third side wall 43 and the fourth side wall are both connected to the first side wall 41 and the second side wall 42 to jointly enclose the heat dissipation duct 401. The third direction is the Y-axis direction, which is arranged at an angle to the first direction and the second direction.

[0043] Since the third side wall 43 and the fourth side wall are parallel, that is, the distance between the two from top to bottom along the Z-axis direction is the same. Such a setting can constrain the size and shape of the air guide cover 40 along the third direction, avoid occupying too much assembly space, and reduce assembly interference with other structures. Among them, the second side wall 42 is configured with a notch on the side away from the inverter 20 to define the airflow inlet 402 of the heat dissipation air duct 401.

[0044] like Figure 6As shown, in actual use, the microwave oven further includes an assembly housing 50 having an assembly cavity. The assembly housing 50 has a side plate 51 and a back plate 52, which are connected and arranged at an angle. The heat dissipation fan 30, the magnetron 10 and the inverter 20 are all integrated and assembled at the intersection of the side plate 51 and the back plate 52, and the heat dissipation fan 30 is installed on the side plate 51. Among them, the side plate 51 is configured with a plurality of air inlet holes 5101 arranged at intervals at the air inlet of the heat dissipation fan 30, and the back plate 52 is configured with a plurality of air outlet holes 5201 arranged at intervals at the position close to the magnetron 10 and the inverter 20. The air inlet holes 5101 are used to allow external gas to pass into the assembly cavity, and under the action of the heat dissipation fan 30, the gas is diverted to the magnetron 10 and the inverter 20, and then flows out through the corresponding air outlet holes 5201 to achieve heat dissipation. At the same time, such an arrangement is equivalent to installing the cooling fan 30, the magnetron 10 and the inverter 20 on the rear side of the microwave oven / steamer combination machine, so as to avoid occupying the assembly space on the top, bottom or front side; and, since for the microwave oven / steamer combination machine, a certain assembly space is reserved between the rear side of its inner pot and the back plate 52 of the assembly shell 50, such an arrangement can make full use of this space and is more conducive to a reasonable spatial layout.

[0045] The following is a detailed description of the cooperation between the air guide cover 40 and the inverter 20 and the assembly of the heat dissipation fan 30.

[0046] See also Figures 1 to 3 , exemplarily, the inverter 20 includes a main body 21 and a bracket 22 supported on the main body 21, and one end of the air duct 40 away from the heat dissipation fan 30 is connected to the bracket 22. The bracket 22 is used to connect with the assembly housing 50 to realize the assembly of the inverter 20. The air duct 40 is connected to the bracket 22 for easy disassembly and assembly. Among them, the bracket 22 is configured with a first assembly flange 221 on one side facing the magnetron 10 along the first direction, and the air duct 40 is provided with a second assembly flange 45 at the air flow outlet 403 of the heat dissipation duct 401, and the second assembly flange 45 is pressed on the first assembly flange 221. At this time, screws can be used for fastening; at the same time, one of the first assembly flange 221 and the second assembly flange 45 is configured with a card hole, and the other is configured with a card hook, and the card hook is engaged with the card hole to constrain the assembly of the bracket 22 and the air duct 40. Such a setting improves the connection reliability.

[0047] For example, the first assembly flange 221 may be configured with a hook, the first assembly flange 221 may be configured with a hole, the hook passes through the hole and is clamped on the edge of the hole to achieve a clamping fit. Alternatively, the first assembly flange 221 may be configured with a hole, the first assembly flange 221 may be configured with a hook.

[0048] The bracket 22 is arranged in a U shape to enclose a cavity to accommodate the main body 21 of the inverter 20. The assembly housing 50 also has a bottom plate, the bottoms of the side plates 51 and the back plate 52 are connected to the bottom plate, the bottom of the bracket 22 can be screwed to the bottom plate, and one of the horizontal sides of the U-shaped bracket 22 is fixed to the side plate 51 to achieve support.

[0049] like Figure 1 , Figure 3 and Figure 5 As shown, in some embodiments, the microwave oven further includes a fan bracket 60, which is engaged with the heat dissipation fan 30. The fan bracket 60 is connected to the side plate 51 of the assembly housing 50. The fan bracket 60 is configured with a receiving groove 601, in which at least part of the heat dissipation fan 30 is received, and a receiving arm 61 is provided on the groove wall of the receiving groove 601, and the receiving arm 61 has a triangular convexity to engage with the heat dissipation fan 30.

[0050] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A microwave oven with steamer and oven, characterized in that: It comprises a magnetron (10), a frequency converter (20) and a cooling fan (30); The magnetron (10) and the frequency converter (20) are arranged at intervals along a first direction, and are arranged at intervals along a second direction relative to the cooling fan (30), and the first direction and the second direction are arranged at an angle; A heat dissipation duct (401) is arranged between one of the magnetron (10) and the frequency converter (20) and the air outlet of the heat dissipation fan (30), and the heat dissipation duct (401) is capable of guiding part of the airflow flowing through the air outlet in the first direction; the other of the magnetron (10) and the frequency converter (20) is arranged close to the air outlet of the heat dissipation fan (30) and is located on the airflow path of the air outlet.

2. The microwave oven with steamer and oven according to claim 1, characterized in that: The magnetron (10) has a heat dissipation fin (11), the heat dissipation fin (11) is arranged close to the air outlet of the heat dissipation fan (30), and the heat dissipation fan (30) is connected to the frequency converter (20) through the heat dissipation air duct (401).

3. The microwave oven with steamer and oven according to claim 1 or 2, characterized in that: The microwave oven and steamer further comprises an air guide cover (40), wherein the air guide cover (40) is connected between the heat dissipation fan (30) and the frequency converter (20), and the air guide cover (40) is arranged to form the heat dissipation air duct (401); The heat dissipation air duct (401) has an airflow inlet (402) and an airflow outlet (403), and the caliber of the airflow inlet (402) is smaller than the caliber of the airflow outlet (403).

4. The microwave oven with steamer and oven according to claim 3, characterized in that: The air guide cover (40) comprises a first side wall (41) and a second side wall (42); the first side wall (41) and the second side wall (42) are arranged opposite to each other along a second direction, and a distance between the first side wall (41) and the second side wall (42) gradually increases from the magnetron (10) toward the inverter (20); the second side wall (42) is arranged close to the cooling fan (30), and the second side wall (42) is arranged at an inclination.

5. The microwave oven with steamer and oven according to claim 4, characterized in that: The first side wall (41) comprises a straight section (411), a vertical section (412), and an inclined section (413) connected between the straight section (411) and the vertical section (412); the straight section (411) is arranged close to the magnetron (10), and a warped section (414) is connected to a side of the straight section (411) facing away from the inclined section (413); the warped section (414) is arranged to be inclined toward the heat dissipation fan (30).

6. The microwave oven with steamer and oven according to claim 4, characterized in that: The wind guide cover (40) further comprises a third side wall (43) and a fourth side wall, wherein the third side wall (43) and the fourth side wall are arranged opposite to each other and spaced apart along a third direction, and are parallel or tend to be parallel, and the third side wall (43) and the fourth side wall are both connected to the first side wall (41) and the second side wall (42); Wherein, the first direction, the second direction and the third direction are arranged at an angle in pairs.

7. The microwave oven with steamer and oven according to claim 3, characterized in that: The frequency converter (20) comprises a main body (21) and a bracket (22) supported by the main body (21); one end of the air guide cover (40) facing away from the cooling fan (30) is connected to the bracket (22).

8. The microwave oven with steamer and oven according to claim 7, characterized in that: The bracket (22) is configured with a first assembly flange (221) on one side thereof facing the magnetron (10) along a first direction, and the air guide cover (40) is provided with a second assembly flange (45) at an air flow outlet (403) of the heat dissipation air duct (401), wherein the second assembly flange (45) is pressed onto the first assembly flange (221) and is snap-fitted thereto.

9. The microwave oven with steamer and oven according to claim 1, characterized in that: The microwave oven and steamer also includes an assembly shell (50) having an assembly cavity; The assembly housing (50) comprises a side plate (51) and a back plate (52), the side plate (51) and the back plate (52) are connected and arranged at an angle, the heat dissipation fan (30), the magnetron (10) and the frequency converter (20) are integrated and assembled at the intersection of the side plate (51) and the back plate (52), and the heat dissipation fan (30) is installed on the side plate (51); The side plate (51) is configured with a plurality of air inlet holes (5101) arranged at intervals at the air inlet of the cooling fan (30), and the back plate (52) is configured with a plurality of air outlet holes (5201) arranged at intervals at a position close to the magnetron (10) and the inverter (20).

10. The microwave oven with steamer and oven according to claim 1, characterized in that: The microwave oven further comprises a waveguide, and the magnetron (10) is installed in the waveguide; and / or, The microwave oven and steamer further comprises a fan bracket (60), and the fan bracket (60) is snap-fitted with the heat dissipation fan (30).

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