Microwave Steam Oven

Abstract

This invention relates to a microwave steam oven, comprising a housing, a door, a cooking cavity, a microwave generator, a steam generator, and a main heater assembly. The main heater assembly includes two main heating tubes arranged longitudinally above the cooking cavity with a lateral spacing between them. In this invention, because the main heating tubes are arranged longitudinally, they radiate heat laterally, avoiding direct radiation to the door. This prevents the door surface from overheating and reduces heat waste, resulting in better cooking performance.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and in particular to a microwave steam oven. Background Technology

[0002] In existing microwave-steam-grill combination appliances, the grilling heating element is installed horizontally, meaning the heating element 100 is installed horizontally with the plane of the door 200. Figure 1 or Figure 2 As shown, this installation method will cause the surface temperature of the microwave-steam-oven combination door to rise because the radiant heat from the heating element 100 will radiate towards the door 200 as indicated by the arrow perpendicular to the door 200. Furthermore, if like... Figure 2 As shown, when the fan 300 is installed on the side as a side-heating fan, the direction of the fan 300's air intake is exactly perpendicular to the direction of the radiant heat from the heating tube 100. This results in an unstable center within the cooking cavity 400, as indicated by the vertical center of the arrow, preventing the food in the center of the cooking cavity 400 from being effectively heated.

[0003] Therefore, horizontal installation of the heating element will cause the surface temperature of the door to rise. Moreover, this horizontal installation method is not suitable for use with side hot air, that is, it is not suitable to install the fan side. Summary of the Invention

[0004] Therefore, it would be advantageous for the present invention to provide a microwave steam oven that can effectively avoid door temperature rise and reduce heat waste.

[0005] To achieve the above objectives, the present invention provides a microwave steam oven, which includes a housing, a door, a cooking cavity, a microwave generator, a steam generator, and a main heater assembly, wherein the main heater assembly includes two main heating tubes, which are arranged longitudinally above the cooking cavity with a lateral spacing.

[0006] In this invention, the main heating tube is arranged longitudinally, thereby radiating heat laterally and avoiding direct radiation to the door. This avoids the phenomenon of the door surface temperature rising and reduces heat waste, resulting in better cooking effect.

[0007] Furthermore, the aforementioned housing includes a front housing located outside the cooking cavity. The front housing comprises an outer shell, an inner shell, and an inner liner from the outside in. A pair of longitudinal openings are provided on the top plate of the inner liner, and two main heating tubes are installed on the lower side of the top plate of the inner shell and are directly opposite the pair of longitudinal openings.

[0008] This structural design allows the main heating element to radiate heat into the cooking cavity.

[0009] Furthermore, it also includes a side-heating structure, which includes a side-heating motor installed on one side of the inner shell, a side-heating fan driven and connected by the side-heating motor, and an exhaust port and an air supply port located on one side of the inner liner. The exhaust port and the side-heating fan are positioned opposite each other, and the air supply port is arranged around the exhaust port.

[0010] This side-heating structure allows the side-heating fan to draw hot air out of the cooking cavity through the exhaust port and return it to the cooking cavity through the exhaust port, thus agitating the hot air in the cooking cavity and making the heating more uniform. Furthermore, since the fan's suction direction is parallel to and does not intersect with the radiation direction of the main heating tube, there will be no air pressure points in the cooking cavity, resulting in a better baking effect.

[0011] Furthermore, the side-heating structure also includes a side-heating pipe, which is positioned corresponding to the air outlet and arranged around the side-heating fan.

[0012] By using side heating elements, the hot air drawn from the cooking cavity can be heated before being sent back into the cooking cavity, thus better ensuring the heating effect.

[0013] Furthermore, the side hot air fan is located at the center of one side of the inner shell, and the side heating pipes are arranged in a square structure around the side hot air fan.

[0014] This structural design allows hot air inside the cooking cavity to be drawn out from the center and sent in from all sides, resulting in better agitation.

[0015] Furthermore, the aforementioned enclosure also includes a rear enclosure that forms the electrical compartment. The rear enclosure includes a rear panel, an outer rear panel, an outer shell, and a bottom plate. The electrical compartment is equipped with two main cooling fans, a microwave generator, and a steam generator.

[0016] The above structural design allows for front-to-back partitioning of the cooking cavity and electrical chamber, resulting in a more rational layout of the microwave-steam-grill device, more time-saving and labor-saving assembly, and ample space for dual cooling fans to provide sufficient airflow for better heat dissipation.

[0017] Furthermore, it also includes a heat dissipation duct system, which includes a main duct structure for heat dissipation of the electrical room, a side duct structure for heat dissipation of the side hot air motor, and a top duct structure for heat dissipation of the main heater assembly, wherein the side duct structure and the top duct structure are respectively connected to the main duct structure.

[0018] The aforementioned air duct structure enables sufficient heat dissipation for the electrical room, the main heater assembly, and the side air duct structure.

[0019] Furthermore, the main air duct structure includes a main heat dissipation air duct, side air inlets and rear air inlets, side air outlets and rear air outlets. The main heat dissipation air duct is formed by the cavity of the electrical compartment. The side air inlets and rear air inlets are formed on one end of the rear housing and are connected to the main heat dissipation air duct. The side air outlets and rear air outlets are formed on the other end of the rear housing and are connected to the main heat dissipation air duct.

[0020] Two main cooling fans draw outside air into the electrical chamber through the side and rear air inlets on the rear housing. The air mixes with the air entering the electrical chamber through the side air duct structure via the top air outlet. After cooling the electrical components in the electrical chamber, part of the air is discharged from the electrical chamber through the side and rear air outlets, while the other part enters the top air duct structure through the top air inlet and then returns to the electrical chamber through the top air outlet, thus repeating the cycle.

[0021] Furthermore, the side air duct structure includes a side air inlet formed on one side of the outer shell, a side heat dissipation air duct formed between one side of the outer shell and one side of the inner shell, and an upper air outlet connecting the side heat dissipation air duct and the main heat dissipation air duct, wherein the upper air outlet is formed on the upper left side of the rear panel and is located between the two main cooling fans and the side air inlet.

[0022] Through the side air inlet, outside air enters the side cooling duct to cool the side hot air motor, and the cooled air is then drawn into the electrical room through the upper air outlet.

[0023] Furthermore, the top air duct structure includes an upper air inlet, an annular heat dissipation air duct formed between the top plate of the outer shell and the top plate of the inner shell, and an upper air outlet. The upper air inlet is formed on the upper right side of the rear plate and is located between the two main cooling fans and the side air outlet. The air from the main air duct structure enters the annular heat dissipation air duct through the upper air inlet under the action of the two main cooling fans and then returns to the main air duct structure from the upper air outlet.

[0024] The above structural design enables effective heat dissipation from the main heater assembly.

[0025] These and other aspects of the present invention will be more clearly illustrated by referring to the embodiments described below. Attached Figure Description

[0026] The structure of the invention, as well as further objects and advantages, will be better understood from the following description taken in conjunction with the accompanying drawings, wherein like reference numerals identify like elements:

[0027] Figure 1 This is a schematic diagram of one arrangement of the heating element and fan for grilling in an existing microwave-steam-grill combination appliance, in which the fan is located at the rear.

[0028] Figure 2This is a schematic diagram of another arrangement of the heating element and fan for grilling in an existing microwave-steam-grill combination appliance, in which the fan is placed on the side;

[0029] Figure 3 This is a schematic diagram of the arrangement of the main heating tube and the side hot air fan of the microwave steam oven according to a specific embodiment of the present invention;

[0030] Figure 4 This is a three-dimensional schematic diagram of a microwave steam oven according to a specific embodiment of the present invention;

[0031] Figure 5 yes Figure 4 An exploded perspective view of the microwave steam oven shown.

[0032] Figure 6 yes Figure 4 A cross-sectional view of the microwave steam oven shown;

[0033] Figure 7 yes Figure 4 The diagram shown is a three-dimensional representation of the microwave steam oven as seen from the left rear after most of the outer shell and rear panel have been removed.

[0034] Figure 8 yes Figure 4 The diagram shown is a three-dimensional representation of the microwave steam oven as seen from the front right after the outer shell and door have been removed.

[0035] Figure 9 yes Figure 4 The diagram shown is a three-dimensional representation of the microwave steam oven after the outer shell has been removed and the door has been opened.

[0036] Figure 10 yes Figure 4 The diagram shows a top view of the microwave oven after removing the outer casing. However, the inverter in the electrical compartment has been replaced with a transformer and a high-voltage capacitor, and the direction of airflow is indicated by arrows in the diagram. Detailed Implementation

[0037] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0038] like Figure 3 As shown, and refer to Figures 4 to 6 According to a specific embodiment of the present invention, a microwave steam oven includes a housing 1, a cooking cavity 2, a door 3, a steam generator 42, a main heater assembly including two main heating tubes 5, a microwave generator including a magnetron 41 and a bottom waveguide 43, a side hot air structure 7, and a heat dissipation duct system. Figure 6 As shown, in this embodiment, the two main heating tubes 5 of the main heater assembly are arranged longitudinally above the cooking cavity 2 with a lateral spacing.

[0039] like Figure 4 and Figure 5 As shown, and refer to Figures 6 to 8 The housing 1 includes a front housing 11 and a rear housing 13, which use the same outer shell 10. The portion of housing 1 that, together with the door 3, encloses the cooking cavity 2 is the front housing 11, and the portion of housing 1 that encloses the electrical compartment 4 is the rear housing 13. For example... Figure 6 As shown, the front housing 11 includes an outer shell 10, an inner shell 12, and an inner liner 14 from the outside in. The top plate 140 of the inner liner 14 is provided with a pair of longitudinal openings or a group of longitudinal openings (not shown). Two main heating pipes 5 are installed on the lower side of the top plate 120 of the inner shell 12 and are directly opposite the pair of longitudinal openings or the group of longitudinal openings. The rear housing 13 includes a rear plate 132, an outer rear plate 130, an outer shell 10, and a bottom plate (not shown).

[0040] like Figures 7 to 9 As shown, the electrical room 4 contains a steam generator 42, a magnetron 41, a frequency converter 45, two main cooling fans 47, and a computer board 49. Of course, in another embodiment, the frequency converter 45 can also be replaced with a transformer 450 and a capacitor 451 according to customer needs, such as... Figure 10 As shown. However, neither the inverter nor the transformer scheme affects the structure of the side hot air structure 7 and the heat dissipation duct system, which will be introduced next.

[0041] like Figures 6 to 8 As shown, the side heating structure 7 includes a side heating motor 71 mounted on one side of the inner shell 12, a side heating fan 73 driven and connected by the side heating motor 71, and a side heating pipe 75 (see...). Figure 6 The inner liner 14 has an exhaust vent 141 and an exhaust vent 143 located on one side. A side-mounted hot air fan 73 is positioned at the center of one side of the inner liner 12. Side heating pipes 75 are arranged in a roughly square structure around the side-mounted hot air fan 73 and are preferably positioned directly opposite the exhaust vent 143, allowing reheated hot air to be returned to the cooking cavity 2 via the exhaust vent 143. It should be noted that in this embodiment, "one side" refers to the left side when viewed from the door 3.

[0042] like Figure 8 As shown, the exhaust vent 141 is positioned directly opposite the side hot air fan 73, and the air supply vents 143 are arranged around the exhaust vent 141. It should be understood that, in this embodiment, the exhaust vent 141 is an exhaust vent group composed of multiple small exhaust vents; there are multiple air supply vents 143, which are arranged around the exhaust vent 141, and each air supply vent 143 is also an air supply vent group composed of multiple small air supply vents.

[0043] It should be noted that, in this embodiment, the heat dissipation duct system includes a main duct structure for heat dissipation of the electrical room 4, a side duct structure for heat dissipation of the side hot air motor 71, and a top duct structure for heat dissipation of the main heater assembly. The side duct structure and the top duct structure are respectively connected to the main duct structure. Specifically, as shown... Figure 7 As shown, and refer to Figure 4 , Figure 5 and Figure 8 In this embodiment, the main air duct structure includes a main heat dissipation air duct 40, a side air inlet 81 and a rear air inlet 82, a side air outlet 83 and a rear air outlet 84, wherein the main heat dissipation air duct 40 is formed by the cavity of the electrical room 4; the side air inlet 81 (see...) Figure 4 and Figure 7 ) and rear air intake 82 (see Figure 9 The side air inlet 81 is formed on the outer shell 10, and the rear air inlet 82 is formed on the outer rear panel 130 of the rear housing 13; the side air outlet 83 (see Figure 5 ) and rear air vent 84 (see Figure 9 The former, namely the side air outlet 83, is formed on the outer shell 10, and the latter, namely the rear air outlet 84, is formed on the outer rear panel 130 of the rear box 13.

[0044] like Figure 7 and Figure 10 As shown, and refer to Figure 4 The side air duct structure includes a side air inlet 72 formed on one side (left side) of the outer shell 10, a side heat dissipation air duct 17 formed between one side (left side) of the outer shell 10 and one side (left side) of the inner shell 12, and an upper air outlet 85 connecting the side heat dissipation air duct 17 and the main heat dissipation air duct 40. The upper air outlet 85 is formed on the upper left side of the rear plate 132 and is located between the two main cooling fans 47 and the side air inlet 81. Through the side air inlet 72, outside air enters the side heat dissipation air duct 17 to dissipate heat on the side hot air motor 71. The dissipated air is then drawn into the electrical chamber 4 through the upper air outlet 85, and together with the outside air entering the electrical chamber 4 through the side air inlet 81 and the rear air inlet 82, it dissipates heat on the electrical components in the electrical chamber 4 along the main heat dissipation air duct 40.

[0045] like Figure 7 and Figure 10 As shown, and refer to Figure 5The top airflow structure includes an upper air inlet 86, an annular heat dissipation airflow 87 formed between the top plate 101 of the outer shell 10 and the top plate 120 of the inner shell 12, and an upper air outlet 85. The upper air inlet 86 is formed on the upper right side of the rear plate 132 and is located between the two main cooling fans 47 and the side air outlet 83. Thus, air from the main heat dissipation airflow 40, under the action of the two main cooling fans 47, enters the annular heat dissipation airflow 87 through the upper air inlet 86 and returns to the main heat dissipation airflow 40 from the upper air outlet 85. Through this structural arrangement, effective heat dissipation can be achieved for the top plate 120 of the inner shell 12.

[0046] Additionally, it should be noted that, as Figure 5 , Figure 7 , Figure 8 and Figure 10 As shown, in this embodiment, the heat dissipation duct system further includes a side duct structure for dissipating heat from the lighting system and other components of the microwave oven. This side duct structure includes a side air outlet 74 formed on the other side (right side) of the outer casing 10, and a side heat dissipation duct 89 formed between the other side (right side) of the outer casing 10 and the other side (right side) of the inner casing 12 for dissipating heat from lighting devices (not shown). Figure 10 The device includes a side air inlet 88 that connects the side heat dissipation duct and the main heat dissipation duct 40. With this structure, a portion of the air from the main heat dissipation duct 40 can enter the side heat dissipation duct 89 through the side air inlet 88 under the action of the main heat dissipation fan 47, and dissipate heat from the lighting devices and other heat-generating devices installed on the right side of the micro steam oven. Then the air is discharged to the outside environment through the side air outlet 74.

[0047] The following is for reference. Figure 10 and combined Figures 4 to 9 Let me explain how the heat dissipation airflow system works:

[0048] Figure 10 The arrows in the image indicate the wind direction.

[0049] External air enters the side cooling duct 17 through the side air inlet 72. After cooling the side hot air motor 71, the external air is drawn into the main cooling duct 40 of the electrical room 4 through the upper air outlet 85. It mixes with the external air entering the main cooling duct 40 through the side air inlet 81 and the rear air inlet 82. The mixed air cools the electrical components in the electrical room 4 along the main cooling duct 40. Part of the air is directly discharged to the external environment through the side air outlet 83 and the rear air outlet 84. Another part of the air enters the annular cooling duct 87 through the upper air inlet 86 and then returns to the main cooling duct 40 through the upper air outlet 85. The remaining part of the air enters the side cooling duct 89 through the side air inlet 88, cools the heating devices such as the lighting device installed on the right side of the microwave oven, and is then discharged to the external environment through the side air outlet 74.

[0050] The technical content and features of this invention have been disclosed above. However, it is understood that, under the inventive concept of this invention, those skilled in the art can make various changes and improvements to the above structure, including combinations of the technical features disclosed or claimed herein, as well as other combinations that explicitly include these features. These modifications and / or combinations all fall within the technical field of this invention and are within the scope of protection of the claims of this invention.

Claims

1. A microwave steam oven, comprising a housing, a door, a cooking cavity, a microwave generator, a steam generator, and a main heater assembly, characterized in that, The main heater assembly includes two main heating tubes arranged longitudinally above the cooking cavity with a lateral spacing. The housing includes a front housing located outside the cooking cavity, which includes an outer shell, an inner shell, and an inner liner from the outside in. The microwave steam oven also includes a side hot air structure, which includes a side hot air motor mounted on one side of the inner shell, a side hot air fan driven and connected by the side hot air motor, and an exhaust vent and an air supply vent located on one side of the inner liner. The exhaust vent and the side hot air fan are directly opposite each other, and the air supply vent is arranged around the exhaust vent.

2. The microwave steam oven as described in claim 1, characterized in that, The inner liner top plate is provided with a pair of longitudinal openings, and the two main heating tubes are installed on the lower side of the inner shell top plate and are directly opposite the pair of longitudinal openings.

3. The microwave steam oven as described in claim 2, characterized in that, The side hot air structure also includes a side heating pipe, which is arranged corresponding to the air outlet and around the side hot air fan.

4. The microwave steam oven as described in claim 3, characterized in that, The side hot air fan is located at the center of one side of the inner shell, and the side heating pipe is arranged in a square structure around the side hot air fan.

5. The microwave steam oven as described in claim 1, characterized in that, The enclosure also includes a rear enclosure that forms an electrical compartment, in which two main cooling fans are arranged; The micro steam oven also includes a heat dissipation duct system, which includes a main duct structure for heat dissipation of the electrical chamber, a side duct structure for heat dissipation of the side hot air motor, and a top duct structure for heat dissipation of the main heater assembly, wherein the side duct structure and the top duct structure are respectively connected to the main duct structure. The main air duct structure includes a main heat dissipation air duct, a side air inlet and a rear air inlet, a side air outlet and a rear air outlet. The main heat dissipation air duct is formed by the cavity of the electrical room. The side air inlets and the rear air inlets are formed on one end of the rear housing, and the side air outlets and the rear air outlets are formed on the other end of the rear housing. The side air duct structure includes a side air inlet formed on one side of the outer shell, a side heat dissipation air duct formed between one side of the outer shell and one side of the inner shell, and an upper air outlet connecting the side heat dissipation air duct and the main heat dissipation air duct. The top air duct structure includes an upper air inlet, an annular heat dissipation duct formed between the top plate of the outer shell and the top plate of the inner shell, and an upper air outlet.

6. The microwave steam oven as described in claim 5, characterized in that, The rear enclosure includes a rear panel, an outer rear panel, an outer shell, and a bottom plate. The electrical compartment contains a circuit board, the two main cooling fans, the microwave generator, and the steam generator.

7. The microwave steam oven as described in claim 6, characterized in that, The side air inlets and the rear air inlets are connected to the main heat dissipation duct, and the side air outlets and the rear air outlets are also connected to the main heat dissipation duct.

8. The microwave steam oven as described in claim 7, characterized in that, The upper air outlet is formed on the upper left side of the rear panel and is located between the two main cooling fans and the side air inlet.

9. The microwave steam oven as described in claim 8, characterized in that, The upper air inlet is formed on the upper right side of the rear panel and is located between the two main cooling fans and the side air outlet. The air from the main air duct structure enters the annular cooling air duct through the upper air inlet under the action of the two main cooling fans and then returns to the main air duct structure from the upper air outlet.

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