Inner container structure of double-fan oven and oven thereof

Abstract

The present invention relates to an inner tank structure for a double-fan oven and the oven thereof, comprising an inner tank, a hot air baffle plate is arranged in the inner tank, a top air outlet hole is opened on one side of the top wall of the hot air baffle plate, and a bottom air outlet hole is opened on one side of the bottom wall of the hot air baffle plate, and the top air outlet hole and the bottom air outlet hole are staggered in the left and right directions, and the hole area of ​​the top air outlet hole is larger than that of the bottom air outlet hole. The air outlet of the top air outlet hole can guide the heat at the upper heating tube in the inner tank to the food, so that the coloring effect of the heat at the upper end of the baking tray on the food is more obvious, and the cooking effect is improved, especially the baking tray placed on the third layer of the side bracket in the single-layer baking and the baking tray placed on the fourth layer of the side bracket in the double-layer baking. The bottom air outlet hole can balance the air outlet of the top air outlet hole and can color the bottom of the food, especially the baking tray placed on the third layer of the side bracket in the single-layer baking and the baking tray placed on the second layer of the side bracket in the double-layer baking.

Description

Technical Field

[0001] The invention relates to the field of double-fan ovens, and in particular to an inner tank structure of a double-fan oven and the oven. Background Art

[0002] In the hot air blower system of the oven, the hot air blower mainly blows out the air heated by the heating tube from the hot air baffle outlet. After the hot air forms an internal circulation in the oven liner, it returns to the back of the oven from the hot air baffle inlet. At present, the ovens on the market are mainly single-fan ovens. The hot air blower is installed on the back plate of the liner. The annular back heating tube is installed on the outer periphery of the hot air blower with the motor shaft of the hot air blower as the center of the circle. The hot air baffle is fixed on the inner side of the back plate of the liner, covering the circulation fan and the back heating tube, forming a hot air chamber in the hot air baffle. When the hot air blower and the back heating tube are working, the pressure at the center of the circulation fan is low and the pressure around is high. The circulation fan inhales cold air at the air inlet in the center area, and is heated by the back heating tube to become hot air and flows from the air outlet to the liner. The hot air chamber inhales cold air from the center and blows hot air to the surrounding areas, forming circulating hot air in the oven liner, and performing forced convection heat exchange on the food on the baking tray in the liner.

[0003] Single-fan ovens have insufficient air volume at the air outlet, and the hot air cannot reach the door, resulting in uneven coloring of baked food. To solve this problem, ovens with dual fans are now on the market. In this type of oven, two hot air blowers are arranged up and down, and a partition is set on the back of the hot air baffle, so that each hot air blower is in an independent hot air chamber. Compared with single-fan ovens, the circulating air volume of the air outlet of the dual-fan oven is large enough, and the hot air can reach the door and then return from the center to cover all food surfaces. For example, the oven dual-fan system disclosed in the Chinese utility model patent No. ZL201721918690.4 (authorization announcement No. CN207662174U).

[0004] However, the air outlets of existing oven fan systems are generally symmetrically opened, but after the hot air blower rotates, the air volume on one side will be greater than the air volume on the other side, making it impossible for the hot air flow to be evenly distributed in the inner pot, thereby causing one side of the baked food to be darker than the other side, affecting the baking effect of the oven. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to provide an inner tank structure of a double-fan oven with good temperature field uniformity in view of the prior art.

[0006] The second technical problem to be solved by the present invention is to provide an inner tank structure of a double-fan oven with good baking effect in view of the prior art.

[0007] The third technical problem to be solved by the present invention is to provide an inner tank structure of a double-fan oven suitable for both single-layer baking and double-layer baking in view of the prior art.

[0008] The fourth technical problem to be solved by the present invention is to provide a double-fan oven with good baking effect in view of the prior art.

[0009] The technical solution adopted by the present invention to solve at least one of the above technical problems is: an inner tank structure of a dual-fan oven, including an inner tank, a hot air baffle with an air inlet is arranged in the inner tank, a hot air chamber is formed between the hot air baffle and the back plate of the inner tank, the above-mentioned air inlet includes an upper air inlet and a lower air inlet, the upper and lower air inlets are arranged at intervals along the middle of the hot air baffle, the above-mentioned hot air chamber is installed with an upper hot air blower and a lower hot air blower corresponding to the above-mentioned upper and lower air inlets respectively, and a partition is horizontally installed on the back side of the above-mentioned hot air baffle in the middle of the upper and lower air inlets, characterized in that a top air outlet is opened on one side of the top wall of the hot air baffle, and at the same time, a bottom air outlet is opened on one side of the bottom wall of the hot air baffle, and the top air outlet and the bottom air outlet are staggered in the left and right directions.

[0010] Furthermore, the hole area of ​​the top air outlet is larger than that of the bottom air outlet.

[0011] Furthermore, a first upper air outlet and a second upper air outlet are respectively arranged on both sides of the upper end of the hot air baffle, wherein the first upper air outlet is arranged on the same side as the above-mentioned top air outlet, and the first upper air outlet and the second upper air outlet are basically at the same height, and the movement trajectory of the outer end of the fan blade of the upper hot air blower near the height is from the first upper air outlet to the second upper air outlet, and the first upper air outlet and the second upper air outlet are respectively composed of upper air outlet holes, and the number of upper air outlet holes of the first upper air outlet is more than that of the second upper air outlet, and at the same time, the first upper air outlet can discharge air obliquely upward to its corresponding inner tank side wall, and the second upper air outlet can discharge air horizontally toward its corresponding inner tank side wall. By providing the first upper air outlet and the second upper air outlet, the upper air outlet of the hot air baffle can be guaranteed. When the upper hot air blower rotates, the hot air outlet direction is along the tangent direction of the rotation of the fan blades. The upper edge of the hot air baffle will guide the air outlet of the upper hot air blower. Therefore, the number of upper air outlet holes of the first upper air outlet in the present invention is more than that of the second upper air outlet, so that the left and right air outlets at the upper end of the hot air baffle can be further uniform. At the same time, the first upper air outlet can discharge air obliquely upward toward the corresponding side wall of the inner pot, so that the hot air blown out by the first upper air outlet is first blown onto the corresponding side wall of the inner pot, and then rebounds onto the baking tray. The second upper air outlet can discharge air horizontally toward the direction of the corresponding side wall of the inner pot, thereby ensuring the amount of hot air on the upper part of the inner pot on the side where the second upper air outlet is located.

[0012] Furthermore, the hot air baffle is provided with a first middle air outlet and a second middle air outlet at both ends of the middle part of the hot air baffle along the height direction, the second middle air outlet is provided on the same side as the bottom air outlet, the first middle air outlet and the second middle air outlet are basically at the same height, and the movement trajectory of the outer end of the fan blade of the lower hot air blower near the height is from the first middle air outlet to the second middle air outlet. By providing the first middle air outlet and the second middle air outlet, the middle part of the hot air baffle is ensured to be out of the air.

[0013] In order to make the air outlet of the hot air baffle more uniform, the left and right lower ends of the hot air baffle are respectively provided with a first lower air outlet and a second lower air outlet. The first lower air outlet and the second lower air outlet can balance the air outlets of the first upper air outlet, the second upper air outlet, the first middle air outlet and the second middle air outlet, so that the hot air blown out from the hot air chamber is more uniform.

[0014] In order to make the air outlet on the left and right sides of the lower end of the hot air baffle more uniform, the first lower air outlet and the second lower air outlet are symmetrically arranged along the vertical center line of the hot air baffle.

[0015] Furthermore, the first lower air outlet and the second lower air outlet are respectively composed of lower air outlet holes, each of which is a long strip hole extending vertically, and in each lower air outlet, the area of ​​the lower air outlet hole located on the outer side is smaller than that of the lower air outlet hole located on the inner side. Since the air outlet direction of the lower hot air blower is along the tangent direction of its fan blades, the above design can make the air outlet of each lower air outlet uniform along the left and right directions.

[0016] Furthermore, the upper end of the hot air baffle is provided with a first upper auxiliary air outlet hole and a second upper auxiliary air outlet hole, respectively. The first upper auxiliary air outlet hole and the second upper auxiliary air outlet hole are basically at the same height. The movement trajectory of the outer end of the fan blade of the upper hot air blower near the height is from the first upper auxiliary air outlet hole to the second upper auxiliary air outlet hole, and the hole area of ​​the first upper auxiliary air outlet hole is smaller than that of the second upper auxiliary air outlet hole. The first upper auxiliary air outlet hole is located on one side of the upper air inlet, and the second upper auxiliary air outlet hole is located on the other side of the upper air inlet and above the upper air inlet. The first upper auxiliary air outlet hole can realize horizontal air outlet along the air outlet direction of the upper hot air blower, while taking into account the horizontal air outlet on the side where it is located. The second upper auxiliary air outlet hole can realize horizontal air outlet along the air outlet direction of the upper hot air blower while taking into account the horizontal air outlet on the side where it is located. In this way, through the setting of the first upper auxiliary air outlet hole and the second upper auxiliary air outlet hole, the air outlet at the upper end of the hot air baffle can be made more uniform in coordination with the first upper air outlet and the second upper air outlet.

[0017] In order to enable the first upper auxiliary air outlet hole and the second upper auxiliary air outlet hole to better meet the air outlet requirements of the area between the first upper air outlet and the second upper air outlet hole, the first upper auxiliary air outlet hole and the second upper auxiliary air outlet hole are both laterally extending long strip holes, and the hole widths of the two are similar.

[0018] In order to supplement the air outflow in the area between the first middle air outlet and the second middle air outlet, the middle part of the hot air baffle is respectively provided with a first middle auxiliary air outlet and a second middle auxiliary air outlet, the first middle auxiliary air outlet and the second middle auxiliary air outlet are basically at the same height, and the movement trajectory of the outer end of the fan blade of the lower hot air blower near the height is from the first middle auxiliary air outlet to the second middle auxiliary air outlet, the first middle auxiliary air outlet and the second middle auxiliary air outlet are located between the first middle air outlet and the second middle air outlet, and the hole area of ​​the first middle auxiliary air outlet is larger than that of the second middle auxiliary air outlet. Since when the lower hot air blower rotates, the hot air outlet direction is along the tangent direction of the rotation of the fan blade, the partition will guide the air outflow of the lower hot air blower, so in order to make the air outflow of the first middle auxiliary air outlet and the second middle auxiliary air outlet uniform, the hole area of ​​the first middle auxiliary air outlet is larger than that of the second middle auxiliary air outlet. The first auxiliary air outlet hole and the second auxiliary air outlet hole are beneficial to the upper layer of food located on the second layer of the side rack in double-layer baking, and can also promote the baking of food located on the third layer of the side rack in single-layer baking, while having less impact on the bottom of the food.

[0019] Furthermore, the first auxiliary air outlet hole and the second auxiliary air outlet hole are both long strip holes extending laterally, and the widths of the two are similar, and the upper hole of each auxiliary air outlet hole extends horizontally backward along its length direction to form a hot air baffle. By providing the hot air baffle, it is possible to prevent the air from each auxiliary air outlet hole from blowing directly upward and failing to blow a large amount of air to the upper layer of the food on the corresponding baking tray. Each hot air baffle can guide the air from the corresponding auxiliary air outlet hole so that it can blow straight forward through the food in the corresponding baking tray.

[0020] In order to enable the first upper air outlet to better discharge air obliquely upward toward its corresponding inner liner side wall, and the second upper air outlet to better discharge air horizontally toward its corresponding inner liner side wall, the upper air outlet holes are all long holes, wherein the upper air outlet holes of the above-mentioned first upper air outlet are arranged along the extension direction of the side edge of the hot air baffle plate where they are located, the upper air outlet holes located at the upper part of the second upper air outlet are arranged horizontally along the upper edge of the hot air baffle plate, and the upper air outlet holes located at the lower part are arranged vertically and leave a certain gap with the side edge of the hot air baffle plate.

[0021] Furthermore, a middle upper air outlet is provided at the lower side of the first upper air outlet, and the middle upper air outlet is located above the partition, the first middle air outlet and the second middle air outlet are respectively composed of middle air outlet holes, and the number of middle air outlet holes of the first middle air outlet is less than that of the second middle air outlet, and the first and second middle air outlets can respectively discharge air to the front of the side where they are located. The middle upper air outlet can fully utilize the air outlet of the upper hot air blower, and the middle upper air outlet can supplement the air outlet in the middle of the hot air baffle.

[0022] In order to more fully direct the heat from the upper heating tube to the food, the top air outlet is a long hole extending along the length direction of the top wall of the hot air baffle, and the length of the top air outlet is 40% to 60% of the length of the top wall of the hot air baffle.

[0023] To prevent the bottom from being too dark in color, the hole area of ​​the bottom air outlet is smaller than that of the top air outlet. The bottom air outlet is a long hole extending along the length direction of the bottom wall of the hot air baffle, and the length of the bottom air outlet is 20% to 40% of the bottom length of the hot air baffle.

[0024] In order to stably install the side bracket, the hot air baffle is provided with a mounting hole for installing the side bracket.

[0025] The technical solution adopted to solve the fourth technical problem is: a double-fan oven with the inner tank structure as described above.

[0026] Compared with the prior art, the advantages of the present invention are: a partition is provided between the upper and lower hot air blowers, thereby preventing the air from interfering with each other, and the air outlet through the top air outlet in the present invention can direct the heat from the upper heating tube in the inner pot to the food, so that the heat from the upper end of the baking tray has a more obvious coloring effect on the food, thereby improving the cooking effect, especially for the baking tray placed on the third layer of the side bracket in single-layer baking and the baking tray placed on the fourth layer of the side bracket in double-layer baking. The bottom air outlet can balance the air outlet of the top air outlet and can color the bottom of the food, especially for the baking tray placed on the third layer of the side bracket in single-layer baking and the baking tray placed on the second layer of the side bracket in double-layer baking. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the hot air baffle in Example 1 of the present invention;

[0028] Figure 2 for Figure 1 A schematic diagram of the structure in another direction;

[0029] Figure 3 This is a schematic diagram of the structure of the inner tank of a double-fan oven in a single-layer baking mode in Example 1 of the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the inner tank of a double-fan oven in double-layer baking mode in Example 1 of the present invention;

[0031] Figure 5 It is a schematic diagram of the partial structure of the inner liner structure in Example 1 of the present invention;

[0032] Figure 6 is a cross-sectional view of the inner liner structure in Example 1 of the present invention;

[0033] Figure 7This is a schematic diagram of the structure of the hot air baffle in Example 2 of the present invention;

[0034] Figure 8 This is a schematic diagram of the structure of the hot air baffle in Example 3 of the present invention;

[0035] Fig. 9 Schematic diagram of the structure of the hot air baffle in Example 4 of the present invention. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below with reference to the accompanying drawings.

[0037] Embodiment 1:

[0038] like Figures 1 to 6 As shown, a dual-fan oven includes an inner tank structure, the inner tank structure includes an inner tank 1, an upper heating tube 11 is installed on the top surface of the inner tank 1, a lower heating tube 16 is provided on the bottom surface of the inner tank 1, and side brackets 14 are respectively installed on the left and right inner walls of the inner tank 1. In addition, a hot air baffle 2 with an air inlet is provided in the inner tank 1, and a hot air chamber 20 is formed between the hot air baffle 2 and the back plate of the inner tank 1. The above-mentioned air inlet includes an upper air inlet 31 and a lower air inlet 32. The upper and lower air inlets 31, 32 are arranged at intervals along the middle of the hot air baffle 2. The upper hot air blower 121 and the lower hot air blower 122 corresponding to the upper and lower air inlets 31, 32, respectively, are installed in the above-mentioned hot air chamber 20. The outer periphery of the lower hot air blowers 121, 122 is respectively surrounded by an annular back heating tube 15. A partition 13 is fixed horizontally on the back of the hot air baffle 2 in the middle of the upper and lower air inlets 31, 32. When installed, the front end of the partition 13 is fixed to the rear surface of the hot air baffle 2, and the rear end is fixed to the front surface of the back plate of the inner tank 1, thereby separating the hot air chamber 20 up and down to avoid mutual interference between the air outlets of the upper and lower hot air blowers 121, 122. The rotation direction of the fan blades of the upper and lower hot air blowers 121, 122 can be combined in a variety of ways. In this embodiment, the rotation direction of the fan blades of the upper and lower hot air blowers 121, 122 is clockwise. In this embodiment, the placement layers of each side bracket 14 are five layers. In this embodiment, the baking tray 10 is placed on the third layer of the side bracket 14 by default for single-layer baking. Figure 3 As shown, when double-layer baking is performed, two baking trays 10 are placed on the second and fourth layers of the side bracket 14, respectively. Figure 4 In this embodiment, the left and right sides of the hot air baffle 2 are respectively provided with mounting holes 87, and the connecting rods at the upper and lower ends of the rear side of each side bracket 14 are respectively inserted into the corresponding mounting holes 87, so as to achieve a stable fixation of the rear end of each side bracket 14.

[0039] Further, in this embodiment, if Figure 1As shown, the left and right upper ends of the hot air baffle 2 are respectively provided with a first upper air outlet 41 and a second upper air outlet 42, which are respectively composed of upper air outlet holes 40, and the number of upper air outlet holes 40 of the first upper air outlet 41 is greater than that of the second upper air outlet 42. At the same time, the first upper air outlet 41 can discharge air obliquely upward to the corresponding side wall of the inner liner 1, while the second upper air outlet 42 can discharge air horizontally to the corresponding side wall of the inner liner 1. The left and right ends of the middle part of the hot air baffle 2 along its height direction are respectively provided with a first middle air outlet 81 and a second middle air outlet 82. In addition, a top air outlet 6 is provided on the left side of the top wall of the hot air baffle 2, and a bottom air outlet 86 is provided on the right side of the bottom wall of the hot air baffle 2.

[0040] By respectively opening the first upper air outlet 41, the second upper air outlet 42, the first middle air outlet 81, the second middle air outlet 82, the top air outlet 6 and the bottom air outlet 86 on the hot air baffle 2, the air flow in the hot air chamber 20 can be evenly blown out through the hot air baffle 2, thereby making the temperature field inside the inner pot 1 evenly distributed, and the first upper air outlet 41, the second upper air outlet 42, the first middle air outlet 81, the second middle air outlet 82, the top air outlet 6 and the bottom air outlet 86 are respectively opened along the air outlet direction of the corresponding hot air blower, thereby effectively ensuring the hot air outlet volume of each air outlet, and effectively ensuring the baking and heating of the food in the inner pot 1. Furthermore, when the upper hot air blower 121 rotates, the direction of its hot air outlet is along the tangential direction of the rotation of the fan blades, and the upper edge of the hot air baffle 2 will guide the air outlet of the upper hot air blower 121. Therefore, the number of upper air outlet holes 40 of the first upper air outlet 41 in the present invention is greater than that of the second upper air outlet 42, so that the left and right air outlets at the upper end of the hot air baffle 2 can be further uniform, and at the same time, the first upper air outlet 41 can discharge air obliquely upward toward the corresponding side wall of the inner pot 1, so that the hot air blown out by the first upper air outlet 41 first blows onto the corresponding side wall of the inner pot 1, and then rebounds onto the baking tray 10, and the second upper air outlet 42 can discharge air horizontally toward the direction of the corresponding side wall of the inner pot 1, thereby ensuring the amount of hot air on the upper part of the inner pot 1 on the side where the second upper air outlet 42 is located. The air outlet through the top air outlet 6 can direct the heat from the upper heating tube 11 in the inner pot 1 to the food, so that the heat from the upper end of the baking tray 10 can color the food more obviously, thereby improving the cooking effect, especially the baking tray 10 placed on the third layer of the side rack 14 in single-layer baking and the baking tray 10 placed on the fourth layer of the side rack 14 in double-layer baking. The bottom air outlet 86 can balance the air outlet of the top air outlet 6 and color the bottom of the food, especially the baking tray 10 placed on the third layer of the side rack 14 in single-layer baking and the baking tray 10 placed on the second layer of the side rack 14 in double-layer baking.

[0041] In order to make the first upper air outlet 41 better to discharge air obliquely upward to the left side wall of the inner liner 1, and the second upper air outlet 42 better to discharge air horizontally to the right side wall of the inner liner 1, the upper air outlet holes 40 are all long holes, wherein the upper air outlet holes 40 of the first upper air outlet 41 are arranged along the extension direction of the upper left side edge of the hot air baffle 2, the upper air outlet holes 40 of the second upper air outlet 42 are arranged horizontally along the upper edge of the hot air baffle 2, and the upper air outlet holes 40 at the bottom are arranged vertically and leave a certain gap with the side edge of the hot air baffle 2. Specifically, in this embodiment, the first upper air outlet 41 has four upper air outlet holes 40, and the second upper air outlet 42 has three upper air outlet holes 40.

[0042] Furthermore, a middle upper air outlet 7 is provided at the lower side of the first upper air outlet 41, and the middle upper air outlet 7 is located above the partition 13, and the first middle air outlet 81 and the second middle air outlet 82 are respectively composed of middle air outlet holes 80, and the number of middle air outlet holes 80 of the first middle air outlet 81 is less than that of the second middle air outlet 82, and the first and second middle air outlets 81, 82 can respectively discharge air to the front of the side where they are located. The opening of the middle upper air outlet 7 can make full use of the air outlet of the upper hot air blower 121, and the middle upper air outlet 7 can supplement the air outlet of the middle part of the hot air baffle 2. Specifically, in the present embodiment, the above-mentioned middle-upper air outlet 7 is composed of two middle-upper air outlet holes 70, each of which is a long hole extending vertically, and each middle air outlet hole 80 is a long hole extending vertically, wherein the number of the middle air outlet hole 80 of the first middle air outlet 81 is one, and the number of the middle air outlet holes 80 of the second middle air outlet 82 is two.

[0043] In order to make the air outlet of the hot air baffle 2 more uniform, the left and right lower ends of the hot air baffle 2 are respectively provided with a first lower air outlet 91 and a second lower air outlet 92. By providing the first lower air outlet 91 and the second lower air outlet 92, the air outlet of the first upper air outlet 41, the second upper air outlet 42, the first middle air outlet 81 and the second middle air outlet 82 can be balanced, so that the hot air blown out from the hot air chamber 20 is more uniform. Preferably, the first lower air outlet 91 and the second lower air outlet 92 are symmetrically arranged along the vertical center line of the hot air baffle 2, so that the air outlet on the left and right sides of the lower end of the hot air baffle 2 can be more uniform. In this embodiment, the first lower air outlet 91 and the second lower air outlet 92 are respectively composed of lower air outlet holes 90, each of which is a long strip hole extending vertically, and in each lower air outlet, the area of ​​the lower air outlet hole 90 located on the outside is smaller than that of the lower air outlet hole 90 located on the inside. Since the air outlet direction of the lower hot air blower 122 is along the tangent direction of its fan blades, the above design can make the air outlet of each lower air outlet uniform along the left and right directions.

[0044] The upper end of the above-mentioned hot air baffle 2 is respectively provided with a first upper auxiliary air outlet hole 51 and a second upper auxiliary air outlet hole 52 between the above-mentioned first upper air outlet 41 and the second upper air outlet 42, wherein the first upper auxiliary air outlet hole 51 is located on the left side of the upper air inlet 31, and the second upper auxiliary air outlet hole 52 is located on the upper right side of the upper air inlet 31, and the hole area of ​​the first upper auxiliary air outlet hole 51 is smaller than that of the second upper auxiliary air outlet hole 52. In this embodiment, the first upper auxiliary air outlet hole 51 and the second upper auxiliary air outlet hole 52 are long strip holes extending laterally, and the widths of the two are close, so that the first upper auxiliary air outlet hole 51 and the second upper auxiliary air outlet hole 52 can better meet the air outlet of the area between the first upper air outlet 41 and the second upper air outlet 42. The first upper auxiliary air outlet hole 51 can realize horizontal air outlet along the air outlet direction of the upper hot air blower 121, while taking into account the horizontal air outlet on its side; the second upper auxiliary air outlet hole 52 can realize horizontal air outlet along the air outlet direction of the upper hot air blower 121, while taking into account the horizontal air outlet on its side. In this way, through the setting of the first upper auxiliary air outlet hole 51 and the second upper auxiliary air outlet hole 52, in coordination with the first upper air outlet 41 and the second upper air outlet 42, the air outlet at the upper end of the hot air baffle 2 can be made more uniform.

[0045] Furthermore, in order to supplement the air flow in the area between the first middle air outlet 81 and the second middle air outlet 82, the middle part of the hot air baffle 2 is provided with a first middle auxiliary air outlet 83 and a second middle auxiliary air outlet 84 along the air flow direction of the lower hot air blower 122, respectively. The first middle auxiliary air outlet 83 and the second middle auxiliary air outlet 84 are located between the first middle air outlet 81 and the second middle air outlet 82, the first middle auxiliary air outlet 83 is located on the left side of the second middle auxiliary air outlet 84, and the hole area of ​​the first middle auxiliary air outlet 83 is larger than the second middle auxiliary air outlet 84. Since the hot air outlet direction of the lower hot air blower 122 is along the tangential direction of the rotation of the fan blades when the lower hot air blower 122 rotates, the partition 13 will guide the air flow of the lower hot air blower 122. Therefore, in order to make the air flow of the first middle auxiliary air outlet 83 and the second middle auxiliary air outlet 84 uniform, the hole area of ​​the first middle auxiliary air outlet 83 is larger than that of the second middle auxiliary air outlet 84. The first auxiliary air outlet hole 83 and the second auxiliary air outlet hole 84 are advantageous for coloring the food on the second layer of the side rack 14 in a double-layer grill, and can also promote the baking of the food on the third layer of the side rack 14 in a single-layer grill, and have little effect on the bottom of the food. In this embodiment, the first auxiliary air outlet hole 83 and the second auxiliary air outlet hole 84 are both long strip holes extending laterally, and the widths of the two are similar, and the upper holes of each auxiliary air outlet hole extend horizontally backward along the length direction thereof to form a hot air baffle 85. The hot air baffle 85 can be provided to prevent the air from each auxiliary air outlet from blowing directly upward and failing to blow a large amount of air to the upper layer of the food on the corresponding grill pan 10, and each hot air baffle 85 can guide the air from the corresponding auxiliary air outlet hole so that it can blow straight forward through the food on the corresponding grill pan 10.

[0046] In the present embodiment, the top air outlet hole 6 and the bottom air outlet hole 86 are both long holes extending in the width direction of the hot air baffle 2, and the widths of the two are close. The hole area of ​​the top air outlet hole 6 is larger than that of the bottom air outlet hole 86, wherein the length of the top air outlet hole 6 is 40% to 60% of the length of the top wall of the hot air baffle 2, which can more fully direct the heat from the upper heating tube 11 to the food, and the length of the bottom air outlet hole 86 is 20% to 40% of the length of the bottom of the hot air baffle 2, thereby preventing the bottom from being too dark in color.

[0047] Embodiment 2:

[0048] like Figure 7 As shown, unlike Example 1, in this embodiment, the blades of the upper hot air blower 121 rotate clockwise, while the blades of the lower hot air blower 122 rotate counterclockwise. Therefore, in this embodiment, the upper half of the hot air baffle 2 (the upper and lower parts of the hot air baffle 2 are bounded by the setting position of the partition 13, the same below) is the same as the hot air baffle 2 in Example 1, and the lower half is a mirror image of the lower half of the hot air baffle 2 in Example 1. Specifically, in this embodiment, the first middle air outlet 81 is arranged on the left side of the hot air baffle 2, and the second middle air outlet 82 is arranged on the right side of the hot air baffle 2, the first middle auxiliary air outlet 83 is located on the right side of the second middle auxiliary air outlet 84, and the bottom air outlet 86 is opened on the left side of the bottom wall of the hot air baffle 2.

[0049] Embodiment 3:

[0050] like Figure 8 As shown, different from Example 1, in this embodiment, the blades of the upper hot air blower 121 rotate counterclockwise, while the blades of the lower hot air blower 122 rotate clockwise. Therefore, in this embodiment, the upper half of the hot air baffle 2 is a mirror image of the hot air baffle 2 in Example 1, and the lower half is the same as the hot air baffle 2 in Example 1. Specifically, in this embodiment, the first upper air outlet 41 is arranged on the left side of the hot air baffle 2, and the second upper air outlet 42 is arranged on the right side of the hot air baffle 2, the first upper auxiliary air outlet 51 is located on the right side of the second upper auxiliary air outlet 52, and the top air outlet 6 is opened on the right side of the bottom wall of the hot air baffle 2.

[0051] Embodiment 4:

[0052] like Fig. 9As shown, unlike Example 1, in this embodiment, the blades of the upper hot air blower 121 rotate counterclockwise, while the blades of the lower hot air blower 122 rotate clockwise. Therefore, in this embodiment, the hot air baffle 2 as a whole is a mirror image of the hot air baffle 2 in Example 1. Specifically, the first upper air outlet 41 is arranged on the left side of the hot air baffle 2, and the second upper air outlet 42 is arranged on the right side of the hot air baffle 2, the first upper auxiliary air outlet 51 is located on the right side of the second upper auxiliary air outlet 52, the top air outlet 6 is opened on the right side of the bottom wall of the hot air baffle 2, the first middle air outlet 81 is arranged on the left side of the hot air baffle 2, and the second middle air outlet 82 is arranged on the right side of the hot air baffle 2, the first middle auxiliary air outlet 83 is located on the right side of the second middle auxiliary air outlet 84, and the bottom air outlet 86 is opened on the left side of the bottom wall of the hot air baffle 2.

[0053] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. An inner tank structure of a double-fan oven, comprising an inner tank (1) with an upper heating tube (11) installed on the inner top surface, a hot air baffle (2) with an air inlet is arranged in the inner tank (1), a hot air chamber (20) is formed between the hot air baffle (2) and the back plate of the inner tank (1), the air inlet comprises an upper air inlet (31) and a lower air inlet (32), the upper and lower air inlets (31, 32) are arranged at intervals along the middle of the hot air baffle (2), an upper hot air blower (121) and a lower hot air blower (122) corresponding to the upper and lower air inlets (31, 32) are installed in the hot air chamber (20), a partition (13) is horizontally installed on the back of the hot air baffle (2) in the middle of the upper and lower air inlets (31, 32), and the characteristics are as follows: A top air outlet hole (6) is provided on one side of the top wall of the hot air baffle (2), and a bottom air outlet hole (86) is provided on one side of the bottom wall of the hot air baffle (2), and the top air outlet hole (6) and the bottom air outlet hole (86) are staggered in the left-right direction; The hole area of ​​the top air outlet hole (6) is larger than that of the bottom air outlet hole (86); A first upper air outlet (41) and a second upper air outlet (42) are respectively arranged on both sides of the upper end of the hot air baffle (2), wherein the first upper air outlet (41) is arranged on the same side as the top air outlet (6), the first upper air outlet (41) and the second upper air outlet (42) are substantially at the same height, and the movement trajectory of the outer end of the fan blade of the upper hot air blower (121) at the height is from the first upper air outlet (41) to the second upper air outlet (42), The first upper air outlet (41) and the second upper air outlet (42) are respectively composed of upper air outlet holes (40), and the number of the upper air outlet holes (40) of the first upper air outlet (41) is greater than that of the second upper air outlet (42); at the same time, the first upper air outlet (41) can discharge air obliquely upward toward the side wall of the inner liner (1) corresponding thereto, while the second upper air outlet (42) can discharge air horizontally toward the side wall of the inner liner (1) corresponding thereto; The upper end of the hot air baffle (2) is respectively provided with a first upper auxiliary air outlet hole (51) and a second upper auxiliary air outlet hole (52), the first upper auxiliary air outlet hole (51) and the second upper auxiliary air outlet hole (52) are basically at the same height, the movement trajectory of the outer end of the fan blade of the upper hot air blower (121) near the height is from the first upper auxiliary air outlet hole (51) to the second upper auxiliary air outlet hole (52), and the hole area of ​​the first upper auxiliary air outlet hole (51) is smaller than that of the second upper auxiliary air outlet hole (52), the first upper auxiliary air outlet hole (51) is located on one side of the upper air inlet (31), and the second upper auxiliary air outlet hole (52) is located on the other side of the upper air inlet (31) and above the upper air inlet (31); The first upper auxiliary air outlet hole (51) and the second upper auxiliary air outlet hole (52) are both long holes extending laterally, and the hole widths of the two holes are similar.

2. The liner structure according to claim 1, characterized in that: The hot air baffle (2) is provided with a first middle air outlet (81) and a second middle air outlet (82) at both ends of the middle part along the height direction thereof, respectively; the second middle air outlet (82) is provided on the same side as the bottom air outlet (86); the first middle air outlet (81) and the second middle air outlet (82) are substantially at the same height; and the movement trajectory of the outer end of the fan blade of the lower hot air blower (122) at a position adjacent to the height is from the first middle air outlet (81) to the second middle air outlet (82).

3. The liner structure according to claim 1, characterized in that: The left and right lower ends of the hot air baffle (2) are respectively provided with a first lower air outlet (91) and a second lower air outlet (92).

4. The liner structure according to claim 3, characterized in that: The first lower air outlet (91) and the second lower air outlet (92) are arranged symmetrically along the vertical center line of the hot air baffle (2).

5. The liner structure according to claim 4, characterized in that: The first lower air outlet (91) and the second lower air outlet (92) are respectively composed of lower air outlet holes (90), each of which is a long hole extending vertically, and in each lower air outlet, the area of ​​the lower air outlet hole (90) located on the outer side is smaller than that of the lower air outlet hole (90) located on the inner side.

6. The liner structure according to claim 2, characterized in that: The middle part of the hot air baffle (2) is respectively provided with a first middle auxiliary air outlet hole (83) and a second middle auxiliary air outlet hole (84); the first middle auxiliary air outlet hole (83) and the second middle auxiliary air outlet hole (84) are basically at the same height, and the movement trajectory of the outer end of the fan blade of the lower hot air blower (122) near the height is from the first middle auxiliary air outlet hole (83) to the second middle auxiliary air outlet hole (84); the first middle auxiliary air outlet hole (83) and the second middle auxiliary air outlet hole (84) are located between the first middle air outlet (81) and the second middle air outlet (82), and the hole area of ​​the first middle auxiliary air outlet hole (83) is larger than that of the second middle auxiliary air outlet hole (84).

7. The liner structure according to claim 6, characterized in that: The first auxiliary air outlet hole (83) and the second auxiliary air outlet hole (84) are both long strip holes extending laterally, and the widths of the two are similar, and the upper hole of each auxiliary air outlet hole extends horizontally backward along its length direction to form a hot air blocking strip (85).

8. The liner structure according to claim 1, characterized in that: The upper air outlet holes (40) are all long holes, wherein the upper air outlet holes (40) of the first upper air outlet (41) are arranged along the extension direction of the side edge of the hot air baffle (2) where they are located, the upper air outlet holes (40) located at the upper part of the second upper air outlet (42) are arranged horizontally along the upper edge of the hot air baffle (2), and the upper air outlet holes (40) located at the lower part are arranged vertically and leave a certain gap with the side edge of the hot air baffle (2).

9. The liner structure according to claim 2, characterized in that: A middle upper air outlet (7) is provided at the lower side of the first upper air outlet (41), and the middle upper air outlet (7) is located above the partition (13), and the first middle air outlet (81) and the second middle air outlet (82) are respectively composed of middle air outlet holes (80), and the number of middle air outlet holes (80) of the first middle air outlet (81) is less than that of the second middle air outlet (82), and the first and second middle air outlets (81, 82) can respectively discharge air to the front of the side where they are located.

10. The liner structure according to any one of claims 1 to 9, characterized in that: The top air outlet hole (6) is a long hole extending along the length direction of the top wall of the hot air baffle (2), and the length of the top air outlet hole (6) is 40% to 60% of the length of the top wall of the hot air baffle (2).

11. The inner liner structure according to any one of claims 1 to 9, wherein the bottom air outlet hole (86) is a long hole extending along the length direction of the bottom wall of the hot air baffle (2), and the length of the bottom air outlet hole (86) is 20% to 40% of the bottom length of the hot air baffle (2).

12. The inner tank structure according to any one of claims 1 to 9, wherein the hot air baffle (2) is provided with a mounting hole (87) for inserting a connecting rod of the side bracket (14).

13. A double-fan oven having an inner tank structure as claimed in any one of claims 1 to 12.

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