Micro-steaming, baking and roasting device

Abstract

The present invention relates to a micro-steaming, baking and roasting device, which comprises a box body, a door body, a cooking cavity and an electrical chamber arranged front and back along the depth direction of the box body. The electrical chamber is located behind the cooking cavity and is internally provided with two cooling fans arranged up and down. The micro-steaming, baking and roasting device further comprises a cooling air duct system, which comprises a main air duct structure for cooling the electrical chamber, a left air duct structure, a right air duct structure and a top air duct structure respectively located on both sides and the top of the cooking cavity and communicated with the main air duct structure. In the present invention, since the electrical chamber is arranged at the rear, there is enough space to assemble two cooling fans arranged up and down to provide sufficient cooling air volume; through the arrangement of multiple air duct structures, under the action of the two cooling fans, the temperature rise of the electrical components in the electrical chamber is effectively controlled, and at the same time, the left side, the right side and the top of the box body are cooled, so as to change the temperature rise of the surface of the box body shell.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and particularly to a microwave steam oven. Background Art

[0002] In the prior art, microwave steam ovens are all arranged vertically, that is, the cooking cavity and the electrical chamber integrated with electrical components are arranged in an upper-lower partition. Such a layout structure makes the bottom space relatively narrow, and only single-power heat dissipation can be arranged. The bottom air intake is restricted, and the heat dissipation effect is poor, resulting in low thermal efficiency of the device and an increase in operating temperature, so that the entire device cannot operate at high power for a long time continuously. Summary of the Invention

[0003] Therefore, it will be advantageous to provide a microwave steam oven with a reasonable layout and effective heat dissipation in the present invention.

[0004] To achieve the above object, the present invention provides a microwave steam oven, which includes a box body, a door body, a cooking cavity and an electrical chamber located in the box body. Among them, the cooking cavity and the electrical chamber are arranged front and back along the depth direction of the box body, the electrical chamber is located behind the cooking cavity, and two heat dissipation fans arranged up and down are installed in the electrical chamber. Among them, the microwave steam oven further includes a heat dissipation air duct system, and the heat dissipation air duct system includes a main air duct structure for dissipating heat from the electrical chamber, a left air duct structure, a right air duct structure and a top air duct structure respectively located on both sides and the top of the cooking cavity and communicating with the main air duct structure.

[0005] In the present invention, since the electrical chamber is arranged at the rear, there is enough space to assemble two heat dissipation fans arranged up and down to provide sufficient heat dissipation air volume; through the setting of multiple air duct structures, under the action of the two heat dissipation fans, the temperature rise of the electrical components in the electrical chamber can be effectively controlled, and at the same time, the left side, right side and top of the box body are cooled, changing the temperature rise of the box body shell surface.

[0006] Further, 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. Among them, the main heat dissipation air duct is formed by the cavity of the electrical chamber, the side air inlet and the rear air inlet are formed at one end of the electrical chamber, and the side air outlet and the rear air outlet are formed at the other end of the electrical chamber.

[0007] Through the above structural setting, under the action of the two heat dissipation fans, the air in the external environment can be drawn into the main heat dissipation air duct through the side air inlet and the rear air inlet, and after cooling and lowering the temperature of the electrical components in the electrical chamber, it is discharged to the outside of the electrical chamber through the side air outlet and the rear air outlet.

[0008] Furthermore, the left air duct structure includes a left air inlet formed on the left front side of the outer shell of the cabinet, a left heat dissipation air duct formed between the outer shell and the inner shell of the cabinet, and an upper air outlet for communicating the left heat dissipation air duct and the main heat dissipation air duct. Among them, the upper air outlet is formed on the upper left side of the rear plate of the cooking cavity and is located between the two heat dissipation fans and the side air inlet.

[0009] With the above structural arrangement, under the action of the two heat dissipation fans, the air in the external environment can enter the left heat dissipation air duct through the left air inlet, and then be sucked into the main heat dissipation air duct through the upper air outlet, and be mixed with the air in the external environment that enters the main heat dissipation air duct through the side air inlet and the rear air inlet. During the process of the air in the external environment flowing through the left heat dissipation air duct, it will take away the heat on the left side inside the outer shell of the cabinet, avoiding the temperature rise on the left side of the outer shell of the cabinet.

[0010] Moreover, 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. Among them, the upper air inlet is formed on the upper right side of the rear plate of the cooking cavity and is located between the two heat dissipation fans and the side air outlet, and the upper air inlet and the upper air outlet are arranged such that the air flow in the main heat dissipation air duct enters the annular heat dissipation air duct through the upper air inlet under the action of the two heat dissipation fans and then returns to the main heat dissipation air duct through the upper air outlet.

[0011] With the above structural arrangement, the air flow can take away the heat on the inner side of the top of the outer shell of the cabinet during the process of flowing through the annular heat dissipation air duct under the action of the two heat dissipation fans, avoiding the temperature rise on the top of the outer shell of the cabinet.

[0012] Furthermore, the right air duct structure includes a right air outlet formed on the right front side of the outer shell of the cabinet, a right heat dissipation air duct formed between the outer shell and the inner shell of the cabinet, and a right air inlet for communicating the right heat dissipation air duct and the main heat dissipation air duct. Among them, the right air inlet is formed on the lower right middle side of the rear plate of the cooking cavity and is located between the two heat dissipation fans and the side air outlet.

[0013] With the above structural arrangement, under the action of the two heat dissipation fans, the air flow in the main heat dissipation air duct can enter the right heat dissipation air duct through the right air inlet, and then be discharged to the external environment through the right air outlet. During the process of the air flow flowing through the right heat dissipation air duct, it will take away the heat on the right side inside the outer shell of the cabinet, avoiding the temperature rise on the right side of the outer shell of the cabinet.

[0014] Still further, the electrical chamber includes a control heat dissipation area and an electrical component area distributed left and right. In the control heat dissipation area, a circuit board and two heat dissipation fans are arranged, and the side air inlet and the rear air inlet are located in the control heat dissipation area, and the side air outlet and the rear air outlet are located in the electrical component area.

[0015] Through the above-mentioned structural arrangement, the circuit board can be cooled by air from the external environment first under the action of the heat dissipation fan, thereby avoiding temperature rise.

[0016] Still further, the electrical components area is arranged with a steam generating module, a magnetron, a frequency converter or a transformer and a high-voltage capacitor, wherein the steam generating module and the frequency converter, or the steam generating module and the high-voltage capacitor, are arranged on the inner upper side of the electrical components area; the magnetron, or the magnetron and the transformer, are arranged on the outer lower side of the electrical components area.

[0017] Through the above-mentioned structural setting, the electrical components are arranged in a staggered manner in space, so that the main heat dissipation air duct is unobstructed, so that each electrical component can be cooled most effectively and heat blockage and inability to dissipate can be avoided.

[0018] Furthermore, a main heater assembly is also included, wherein the main heater assembly includes two main heating tubes, and the two main heating tubes are longitudinally arranged above the cooking cavity in a transversely spaced manner.

[0019] Since the main heating tube is arranged longitudinally, it radiates heat horizontally, avoiding direct radiation to the door body. This not only avoids the phenomenon of increased temperature on the door body surface, but also reduces heat waste, resulting in better cooking effects.

[0020] Furthermore, it also includes a side hot air structure, which includes a side hot air motor installed on the left side panel of the inner shell of the box body, a side hot air fan driven by the side hot air motor, and an exhaust port and an air supply port arranged on the left side panel of the inner tank of the box body, wherein the exhaust port is arranged directly opposite to the side hot air fan, and the air supply port is arranged around the exhaust port.

[0021] Through the setting of the side hot air structure, the side hot air fan can extract the hot air in the cooking cavity through the exhaust port, and send the extracted hot air back to the cooking cavity through the air supply port, thereby stirring the hot air in the cooking cavity, making the heating more uniform. In addition, since the air suction direction of the side hot air fan and the radiation direction of the main heating tube are parallel and non-intersecting, no air pressure point will appear in the cooking cavity, and the baking effect is good.

[0022] Furthermore, the side hot air structure also includes a side heating pipe, which is arranged corresponding to the air supply port and is arranged around the side hot air fan.

[0023] By providing the side heating tube, the hot air drawn from the cooking cavity can be heated and then sent back to the cooking cavity, thereby better ensuring the heating effect.

[0024] These and other aspects of the invention will be more clearly elucidated with reference to the embodiments described hereinafter. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The structure of the present invention, as well as further objectives and advantages, will be better understood from the following description in conjunction with the accompanying drawings, in which the same reference numerals identify the same elements:

[0026] Figure 1 is a perspective view of a micro steam oven according to a specific embodiment of the present invention;

[0027] Figure 2 is Figure 1 a perspective exploded view of the shown micro steam oven;

[0028] Figure 3 is Figure 2 a perspective view of the shown micro steam oven as seen from the left rear after removing the outer shell and the rear outer panel;

[0029] Figure 4 is Figure 3 a perspective view of the shown micro steam oven as seen from the right front after removing the door body;

[0030] Figure 5 is Figure 2 a perspective view of the shown micro steam oven with the door body open and the outer shell removed;

[0031] Figure 6 is Figure 1 a top view of the shown micro steam oven after removing the outer shell, but in this figure, the frequency converter in the electrical chamber is replaced with a transformer and a high-voltage capacitor;

[0032] Figure 7 is Figure 1 a cross-sectional view of the shown micro steam oven, which shows the main heating tube and the side hot air structure;

[0033] Figure 8 schematically shows Figure 7 the layout of the side hot air fan of the main heating tube and the side hot air structure in the entire micro steam oven in Specific Embodiment

[0034] The specific embodiment of the present invention will be described below in conjunction with the accompanying drawings.

[0035] As Figures 1 to 5 shown, a micro steam oven according to a specific embodiment of the present invention includes a box body 1, a door body 3, a cooking cavity 2 located inside the box body 1, and an electrical chamber 4. Among them, the cooking cavity 2 and the electrical chamber 4 are arranged front and back along the depth direction of the box body 1; the electrical chamber 4 is located behind the cooking cavity 2, and two heat dissipation fans 47 arranged up and down are installed therein.

[0036] As Figure 6As shown, the micro-steaming, baking and roasting device further includes a heat dissipation air duct system, which includes a main air duct structure 400 for dissipating heat from the electrical chamber 4, a top air duct structure 500, a left air duct structure 700 and a right air duct structure 800 that are respectively located on both sides and the top of the cooking cavity 2 and are connected to the main air duct structure 400.

[0037] As Figures 1 to 3 shown, and referring to Figure 6 , the main air duct structure 400 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. Among them, the main heat dissipation air duct 40 is formed by the cavity of the electrical chamber 4. The side air inlet 83 and the rear air inlet 84 are formed at one end of the electrical chamber 4 (the left end when looking from the front to the back of the micro-steaming, baking and roasting device), and the side air outlet 83 and the rear air outlet 84 are formed at the other end of the electrical chamber (i.e., the right end).

[0038] Specifically, in this embodiment, as Figures 1 to 3 shown, the part of the box body 1 outside the electrical chamber 4 includes an inner bottom plate 48, a rear plate 132, an outer rear plate 130 and a U-shaped outer shell 10 with an opening facing downwards. The inner cavity formed between the inner bottom plate 48, the rear plate 132, the outer rear plate 130 and the U-shaped outer shell 10 constitutes the electrical chamber 4. As Figures 1 to 3 shown, the outer rear plate 130 is provided with a rear air inlet 82 and a rear air outlet 84; the side air inlets 81 and the side air outlets 83 are respectively provided on the two side plates of the U-shaped outer shell 10, that is, the left side plate 102 and the right side plate 103.

[0039] As Figures 1 to 3 shown, and referring to Figure 6 , the left air duct structure 700 includes a left air inlet 72 formed on the left front side of the outer shell 10 of the box body 1, a left heat dissipation air duct 17 formed between the outer shell 10 and the inner shell 12 of the box body 1, and an upper air outlet 85 for connecting the left heat dissipation air duct 17 and the main heat dissipation air duct 40. Among them, the upper air outlet 85 is formed on the upper left side of the rear plate 132 of the cooking cavity 2 and is located between the two heat dissipation fans 47 and the side air inlet 81.

[0040] As Figures 1 to 3 shown, and referring to Figure 6 , the top air duct structure 500 includes an upper air inlet 86, an annular heat dissipation air duct 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. Among them, the upper air inlet 86 is formed on the upper right side of the rear plate 132 of the cooking cavity 2 and is located between the two heat dissipation fans 47 and the side air outlet 83. And the upper air inlet 86 and the upper air outlet 85 are arranged such that the air flow in the main heat dissipation air duct 40, under the action of the two heat dissipation fans 47, enters the annular heat dissipation air duct 87 through the upper air inlet 86 and then returns to the main heat dissipation air duct 40 through the upper air outlet 85.

[0041] As Figures 1 to 4 shown, and referring to Figure 6 , the right air duct structure 800 includes a right air outlet 74 formed on the right front side of the outer shell 10 of the cabinet 1, a right heat dissipation air duct 89 formed between the outer shell 10 and the inner shell 12 of the cabinet 1, and a right air inlet 88 for connecting the right heat dissipation air duct 89 and the main heat dissipation air duct 40. Among them, as Figure 4 shown, the right air inlet 88 is formed at the right middle and lower side of the rear plate 132 of the cooking cavity 2 and is located between the two heat dissipation fans 47 and the side air outlet 83.

[0042] As Figure 3 , Figure 5 shown, and referring to Figure 6 , the electrical chamber 4 includes a control heat dissipation area 44 and an electrical component area 46 distributed left and right. Two heat dissipation fans 47 and a circuit board 49 are arranged in the control heat dissipation area 44. In this embodiment, as Figure 3 shown, a magnetron 41, a steam generation module 42, and a frequency converter 45 are arranged in the electrical component area 46. Among them, the steam generation module 42 and the frequency converter 45 are arranged on the inner upper side of the electrical component area 46 and are installed on the rear plate 132 of the cooking cavity 2; the magnetron 41 is arranged on the outer lower side of the electrical component area 46 and is installed on the inner bottom plate 48 of the electrical chamber 4. As Figure 1 , Figure 2 and Figure 5 shown, the side air inlet 81 and the rear air inlet 82 are located in the control heat dissipation area, and the side air outlet 83 and the rear air outlet 84 are located in the electrical component area. It should be noted that in another embodiment, the frequency converter 45 can be replaced by a transformer 450 and a high-voltage capacitor 451. As Figure 6 shown, in this embodiment, the steam generation module 42 and the high-voltage capacitor 451 are arranged on the inner upper side of the electrical component area 46; the magnetron 41 and the transformer 450 are arranged on the outer lower side of the electrical component area 46.

[0043] In addition, as Figure 7 shown, the micro steam convection oven of this embodiment further includes a main heater assembly. The main heater assembly includes two main heating tubes 5, and the two main heating tubes 5 are longitudinally arranged above the cooking cavity 2 at a horizontal interval.

[0044] As Figure 7 shown, and referring to Figure 3 and Figure 4 shown, in this embodiment, the micro steam convection oven further includes a side hot air structure 7. The side hot air structure 7 includes a side hot air motor 71 installed on the left side of the inner shell 12 of the cabinet 1, a side hot air fan 73 driven and connected by the side hot air motor 71, an air extraction port 141 and an air supply port 143 provided on the left side of the inner container 14 of the cabinet 1. As Figure 4As shown. Preferably, in the present embodiment, the air extraction port 141 is disposed directly opposite to the side hot air fan 73, and the air supply port 143 is arranged around the air extraction port 141. As Figure 7 shown, in the present embodiment, the side hot air structure 7 further includes a side heating pipe 75, which is disposed corresponding to the air supply port 143 and arranged around the side hot air fan 73.

[0045] As Figure 8 shown, in the present embodiment, the main heating pipe 5 is longitudinally arranged, so as to radiate heat horizontally (as shown by the arrows in the figure), avoiding direct radiation to the door body 3. In this way, on the one hand, the phenomenon of high temperature on the surface of the door body is avoided, and on the other hand, the waste of heat is reduced, making the cooking effect better; the side hot air fan 73 extracts the hot air in the cooking cavity 2 through the air extraction port 141, and sends the extracted hot air back to the cooking cavity 2 through the air supply port 143, thereby stirring up the air flow in the cooking cavity 2 and making the heating more uniform. Since the direction of the air suction of the side hot air fan 73 is parallel and non-intersecting with the direction of the radiant heat of the main heating pipe 5, there will be no air pressure points in the cooking cavity 2, thus ensuring a good baking effect.

[0046] It should be noted that, as Figure 3 shown, since the side hot air motor 71 is located in the left heat dissipation air duct 17, when the air in the external environment enters the left heat dissipation air duct 17 through the left air inlet 72, the side hot air motor 71 will naturally be cooled and dissipated; as Figure 2 shown, since heating components such as the lighting 80 are installed on the right side of the inner shell 12 of the box body 1, when the air flow enters the right heat dissipation air duct 89 from the main heat dissipation air duct 40 through the upper air inlet 86 (see Figure 3 ), these heating components will also be cooled, thus effectively avoiding the heating of the surface of the box body shell caused by these heating components.

[0047] In addition, as Figure 1 and Figure 2 shown, a water tank 21 and a waste water collection box 23 are installed at the bottom of the cooking cavity 2. Since there is no longer an electrical chamber at the bottom of the cooking cavity 2, there is enough space to set up a water tank 21 with sufficient capacity. Moreover, the condensed water from the cooking cavity 2 can directly flow into the waste water collection box 23 for collection, without the risk of flowing into the electrical chamber 4.

[0048] Next, with reference to Figure 6 , and in combination with Figures 1 to 5 and Figure 7 , introduce how the heat dissipation air duct system works:

[0049] Please refer to the direction indicated by the arrows in Figure 6 , which is the direction of the air flow;

[0050] Under the action of two cooling fans 47, the air in the external environment enters the main cooling air duct 40 through the side air inlet 81 and the rear air inlet 82, and sequentially cools and lowers the temperature of the circuit board 49 in the control cooling area 44 and electrical components such as the magnetron 41 in the electrical component area 46;

[0051] At the same time, the air in the external environment enters the left cooling air duct 17 through the left air inlet 72, cools the side hot air motor 71 and the surface of the inner shell 12, and then is sucked into the main cooling air duct 40 of the electrical chamber 4 through the upper air outlet 85, and is mixed with the air in the external environment that enters the main cooling air duct 40 through the side air inlet 81 and the rear air inlet 82;

[0052] After the mixed air cools the electrical components in the electrical chamber 4 along the main cooling air duct 40 together, a part of it is directly discharged into the external environment through the side air outlet 83 and the rear air outlet 84;

[0053] Another part of the air enters the annular cooling air duct 87 through the upper air outlet 86, cools the top 120 of the inner shell 12 of the box body 1, and then returns to the main cooling air duct 40 through the upper air inlet 85;

[0054] Still another part of the air enters the right cooling air duct 89 through the right air inlet 88, cools the heating devices such as the lighting lamp 80 installed on the right side of the micro-steaming and baking device, and is discharged into the external environment through the right air outlet 74.

[0055] The technical content and technical features of the present invention have been disclosed above. However, it can be understood that under the creative concept of the present 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 here alone, and other combinations that obviously include these features. These deformations and / or combinations all fall within the technical field involved in the present invention and within the protection scope of the claims of the present invention.

Claims

1. A micro-steaming, baking and roasting device, comprising a box body, a door body, a cooking cavity located inside the box body and an electrical chamber, characterized in that, The cooking cavity and the electrical chamber are arranged front and back along the depth direction of the cabinet body. The electrical chamber is located behind the cooking cavity, and two cooling fans arranged vertically are installed in the electrical chamber. Among them, the micro-steaming, baking and grilling device further includes a cooling air duct system, and the cooling air duct system includes a main air duct structure for cooling the electrical chamber, a left air duct structure, a right air duct structure and a top air duct structure which are respectively located on both sides and the top of the cooking cavity and are communicated with the main air duct structure; The main air duct structure includes a main cooling air duct, a side air inlet, a rear air inlet, a side air outlet and a rear air outlet. Among them, the main cooling air duct is formed by the cavity of the electrical chamber, the side air inlet and the rear air inlet are formed at one end of the electrical chamber, and the side air outlet and the rear air outlet are formed at the other end of the electrical chamber; The left air duct structure includes a left air inlet formed on the left front side of the outer shell of the cabinet body, a left cooling air duct formed between the outer shell and the inner shell of the cabinet body, and an upper air outlet for communicating the left cooling air duct and the main cooling air duct; The top air duct structure includes an upper air inlet, an annular cooling air duct formed between the top plate of the outer shell and the top plate of the inner shell, and the upper air outlet; The upper air outlet is formed on the upper left side of the rear plate of the cooking cavity and is located between the two cooling fans and the side air inlet; The upper air inlet is formed on the upper right side of the rear plate and is located between the two cooling fans and the side air outlet. The upper air inlet and the upper air outlet are arranged such that the air flow in the main cooling air duct enters the annular cooling air duct through the upper air inlet under the action of the two cooling fans and then returns to the main cooling air duct through the upper air outlet.

2. The micro-steaming, baking and grilling device according to claim 1, characterized in that, The right air duct structure includes a right air outlet formed on the right front side of the outer shell, a right cooling air duct formed between the outer shell and the inner shell, and a right air inlet for communicating the right cooling air duct and the main cooling air duct. Among them, the right air inlet is formed on the lower middle right side of the rear plate and is located between the two cooling fans and the side air outlet.

3. The micro-steaming, baking and grilling device according to any one of claims 1 to 2, characterized in that, The electrical chamber includes a control cooling area and an electrical component area distributed left and right. A circuit board and the two cooling fans are arranged in the control cooling area. And the side air inlet and the rear air inlet are located in the control cooling area, and the side air outlet and the rear air outlet are located in the electrical component area.

4. The micro-steaming, baking and grilling device according to claim 3, characterized in that, Steam generation modules, magnetrons, inverters or transformers and high-voltage capacitors are arranged in the electrical component area. Among them, the steam generation module and the inverter, or the steam generation module and the high-voltage capacitor, are arranged on the upper inner side of the electrical component area; the magnetron, or the magnetron and the transformer, are arranged on the outer lower side of the electrical component area.

5. The micro-steaming, baking and roasting device according to claim 1, characterized in that It further includes a main heater assembly. Among them, the main heater assembly includes two main heating tubes, and the two main heating tubes are longitudinally arranged above the cooking cavity at a lateral interval.

6. The micro-steaming, baking and roasting device according to claim 1, wherein, It further includes a side hot air structure, which includes a side hot air motor installed on the left side plate of the inner shell of the box body, a side hot air fan driven and connected by the side hot air motor, an air extraction port and an air supply port arranged on the left side plate of the inner tank of the box body. Among them, the air extraction port is arranged opposite to the side hot air fan, and the air supply port is arranged around the air extraction port.

7. The micro-steaming, baking and roasting device according to claim 6, characterized in that, The side hot air structure further includes a side heating pipe, which is arranged corresponding to the air supply port and arranged around the side hot air fan.

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