Double-air-blowing uniform-temperature inner container structure of steaming oven and steaming oven

Abstract

A double-air-blowing uniform-temperature inner container structure of a steaming oven comprises an inner container and an air blowing assembly arranged on a back plate of the inner container, an air outlet baffle is further arranged on the rear side of a cavity of the inner container, an air blowing chamber is defined by the air outlet baffle and the back plate, the air blowing assembly comprises a flow guide plate and an impeller, and the flow guide plate and the impeller are located in the air blowing chamber. An S-shaped volute with double volute tongues is defined by the flow guide plate, the air outlet baffle and the back plate, the volute comprises an impeller bin and air outlet channels located on the two sides of the impeller bin, and the impeller is located in the center of the impeller bin. Air outlet holes corresponding to the outer side position of the air outlet channel are formed in the air outlet baffle in the width direction of the air outlet channel in an array mode. Compared with the prior art, the technical scheme provided by the utility model has the advantages of large blast force, strong temperature uniformity, simple and exquisite structure and excellent baking performance.

Description

Technical Field

[0001] The utility model relates to a double-blast temperature-equalizing inner liner structure of a steam oven and the steam oven. Background Art

[0002] With the rapid development of the domestic baking industry and the increasing demand for labor-saving and efficiency-enhancing baking operations, steam ovens have become widely popular as convenient kitchen baking appliances. In practice, temperature uniformity in steam ovens has always been a key indicator and evaluation criterion for product performance. Some commercially available steam ovens produce food that is partially cooked through and partially undercooked. This is especially true when baking in multiple layers, which can lead to partial burnt and undercooked portions, significantly impacting the taste. Therefore, addressing the issues of uneven temperature and localized heat accumulation within steam ovens is a key issue that urgently needs to be researched and addressed in the steam oven industry.

[0003] For example, the Chinese invention application with application publication number CN108443225A, entitled A Premixing Chamber After a Volute-Type Fan for an Oven, discloses: including a volute air outlet portion, the shape of the volute air outlet is roughly trapezoidal. The portion connected to the air outlet 3 is called a diffusion section. The opening angles of the two diffusion sections in the fan volute are different. The volute structure is symmetrical about the center, and the volute also includes an air inlet portion. The air inlet is composed of a number of circular holes of equal diameter evenly distributed on the same surface. The air inlet ensures that the air flow evenly fills the inlet of the impeller, minimizing the air flow loss. Under the action of the centrifugal fan, the air enters the premixing chamber axially through the several circular holes in the center of the volute and is blown out radially between the impellers. The direction of rotation of the impeller is clockwise along the paper surface, rotating along the expansion direction of the volute spiral line. The volute diffusion section and the volute body are connected by a volute tongue. Due to the oven's structural limitations, the volute utilizes a single-sided air intake system, meaning air enters through a small inlet hole in the center and exits through outlets on either side of the volute. The volute's main body is constructed from a volute plate and two side panels welded or joined together. While the technical solution described in this invention partially addresses the issue of temperature uniformity within the oven, it still suffers from low airflow and poor temperature uniformity within the oven's interior.

[0004] For another example, the Chinese invention application with application publication number CN118512019A, entitled "A non-traditional heating meat automatic cooking box liner structure", discloses: comprising an inner liner shell for enclosing a reaction center, the inner liner is provided with a heating system, a rear baffle is provided on the rear side of the inner liner, a hot air guide assembly, a hot air blower assembly and a heating device are provided between the rear baffle and the hollow portion of the inner liner shell, the hot air mechanism comprises an axial flow fan and a centrifugal fan, and the impellers of the axial flow fan and the centrifugal fan are coaxially arranged, the axial flow fan is arranged on the rear side of the hot air baffle; the left side of the inner liner is provided with a A left baffle is provided, and a microwave heating system is installed between the left baffle and the hollow portion of the inner shell. The microwave heating system includes an electromagnetic wave transmission port, a high-voltage transformer, a high-voltage transformer, a high-voltage diode, a magnetron box, and a magnetron. A lower baffle is provided on the lower side of the inner shell, and an electromagnetic generation system is installed between the lower baffle and the hollow portion of the inner shell. The electromagnetic generation system includes a furnace bottom electromagnetic coil, a temperature sensor, and a control circuit. A right baffle is provided on the right side of the inner shell, and a liquid spray device and an integrated sensor monitoring system are installed between the right baffle and the hollow portion of the inner shell. A feed chute mechanism is also provided on the outer side of the inner shell. The first air inlet includes an air inlet grille and a guide rim. The air holes in the air inlet grille are evenly distributed. The guide rim connects the hot air jet system, the microwave heating system, and the electromagnetic heating system. The rim is cylindrical and has parallel guide vanes above and below. The front end is an air inlet, and the rear end is an air outlet. The cylindrical rim is concentric with the axial flow fan, centrifugal fan, and heating device, and is connected by a transmission device. The technical solution described in this invention application, although a guide plate is provided, the guide plate is cylindrical and connected with parallel guide vanes, which cannot solve the problem of temperature uniformity in the inner shell. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a steam oven with a double-blast temperature-uniform inner liner structure and a steam oven, which have strong blast force, strong temperature uniformity, simple and compact structure, and excellent baking performance.

[0006] The utility model mainly adopts the following technical solutions:

[0007] A double-blast temperature-equalizing inner tank structure of a steam oven comprises an inner tank and an air blast assembly arranged on the back plate of the inner tank, an air outlet baffle is further provided on the rear side of the inner tank cavity, the air outlet baffle and the back plate form an air blast chamber, the air blast assembly comprises a guide plate and an impeller located in the air blast chamber, the guide plate, the air outlet baffle and the back plate form an S-shaped volute with double volute tongues, the volute comprises an impeller compartment and air outlet channels located on both sides of the impeller compartment, the impeller is located at the center of the impeller compartment, and air outlet holes corresponding to the outer positions of the air outlet channel are arranged in an array on the air outlet baffle along the width direction of the air outlet channel.

[0008] Wherein, the side wall of the air outlet channel on the side opposite to the volute tongue extends forward straightly or zigzagly along a direction perpendicular to the radial direction of the impeller.

[0009] Among them, concave cavities are formed on the air outlet baffle and the back plate, and the cross-sections of the concave cavity on the air outlet baffle and the concave cavity on the back plate are both isosceles trapezoidal structures. The concave cavity on the air outlet baffle and the concave cavity on the back plate are matched with each other to form the blast chamber, and an air outlet strip is also provided on the side wall corresponding to the waist of the isosceles trapezoidal structure of the cross-section of the concave cavity of the air outlet baffle.

[0010] The air outlet channel abuts vertically against the edge of the blast chamber at the end of the side wall on the side opposite to the volute tongue, the air outlet channel forms a right-angled trapezoidal structure, and the air outlet holes are arranged close to the lower bottom edge of the right-angled trapezoidal structure.

[0011] Wherein, a heating pipe is further provided in the air outlet channel, and the heating pipe is close to the outer side of the air outlet channel.

[0012] One end of the heating tube is passed through the back plate, and the other end of the heating tube is bent and extends along the width direction of the air outlet channel.

[0013] Wherein, one end of the heating tube is further provided with a mounting plate, and one end of the heating tube is fixed to the back plate through the mounting plate.

[0014] Wherein, the heating tube is a U-shaped heating tube.

[0015] Wherein, the air outlet baffle is detachably fixedly connected to the back plate.

[0016] Wherein, the air outlet baffle is further provided with an air inlet hole corresponding to the position of the impeller compartment.

[0017] A steam oven uses the double-blast temperature-equalizing inner liner structure of the steam oven.

[0018] The invention also provides a novel method for improving the ventilation effect of the air duct, and a novel method for improving the ventilation effect of the air duct, which is convenient for the user to operate the air duct and the air conditioner. The side wall of the air outlet channel extends forward in a zigzag manner, wherein the side wall extends forward in a direction perpendicular to the radial direction of the impeller, which not only avoids the energy loss and vibration caused by the turning of the gas due to the inclination of the side wall during the flow, but also the scheme of the side wall extending forward in a zigzag manner in a direction perpendicular to the radial direction of the impeller is more conducive to pressurizing the gas, further improving the wind force; the end of the side wall of the air outlet channel on the side opposite to the volute tongue is perpendicularly abutted against the edge of the blast chamber, avoiding the need to set a baffle to form an S-shaped volute, reducing the material usage, and having a simple and exquisite structure; the air outlet channel is formed with a right-angled trapezoidal structure. In the process of the gas flowing through the air outlet channel, the gas is pressurized and naturally dispersed to the entire width direction of the air outlet channel outlet due to the characteristics of the right-angled trapezoidal structure of the air outlet channel with a small inlet and a large outlet, which plays a positive role in the all-round gas circulation in the working area of ​​the inner tank cavity, and cooperates with the air outlet holes distributed in an array to improve the temperature uniformity in the working area of ​​the inner tank cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the inner tank from the front side.

[0020] Figure 2 It is a schematic diagram of the inner tank from the back.

[0021] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure shown in AA.

[0022] Figure 4 This is a perspective view of the front structure of the inner liner in an embodiment, and the arrows in the figure indicate the direction of gas flow.

[0023] Figure 5 It is a perspective schematic diagram of the volute structure in the blast chamber in the front view of the inner tank in one embodiment.

[0024] Figure 6Schematic diagram of the back plate cavity structure.

[0025] Figure 7 This is an exploded view of the inner tank structure.

[0026] Figure 8 It is a schematic diagram of the cross-section of the inner tank from a top view.

[0027] Figure 9 for Figure 8 Enlarged view of part B in the middle.

[0028] 1 liner, 10 blast chamber, 11 back plate, 2 blast assembly, 21 guide plate, 22 impeller, 23 motor, 3 air outlet baffle, 30 air outlet hole, 300 air outlet strip, 41 impeller compartment, 42 air outlet channel, 6 heating tube, 61 mounting plate. DETAILED DESCRIPTION

[0029] According to the technical solution of the utility model, the following beneficial effects are achieved:

[0030] See also Figures 1 to 7As shown, a dual-blast temperature-uniform inner liner structure for a steam oven comprises an inner liner 1 and a blast assembly 2 disposed on a back plate 11 of the inner liner 1. An air outlet baffle 3 is also disposed on the rear side of the inner liner 1 cavity. The air outlet baffle 3 and the back plate 11 form a blast chamber 10. The blast assembly 2 comprises a guide plate 21 and an impeller 22 located within the blast chamber 10. The guide plate 21, the air outlet baffle 3, and the back plate 11 form an S-shaped volute with double volute tongues. The volute includes an impeller compartment 41 and air outlet channels 42 located on either side of the impeller compartment 41. The impeller 22 is located at the center of the impeller compartment. The air outlet baffle 3 is provided with an array of air outlet holes 30 along the width direction of the air outlet channel 42, corresponding to the outer positions of the air outlet channel 42. Preferably, the blast assembly 2 further comprises a motor 23, which is connected to the impeller 22 via a motor shaft extending through the back plate 11 and drives the impeller 22 to rotate. Preferably, the diffusion angle of the volute tongue in the present application is between 28 and 42 degrees, which is much larger than the diffusion angle range of 6 to 8 degrees in the prior art, so as to avoid the backflow of gas at the volute tongue to form an undesirable vortex, thereby avoiding the induction of vibration. Preferably, a concave cavity is formed on the air outlet baffle 3 and / or the back plate 11. More preferably, a concave cavity is formed on both the air outlet baffle 3 and the back plate 11, and the concave cavities of the air outlet baffle 3 and the back plate 11 are aligned with each other to form a blast chamber 10. In the present application, the working area in the inner tank cavity is blown by dual air outlet channels. The dual air outlet channels can reduce vibration and noise while improving ventilation efficiency, thereby optimizing the user experience of the product. In the present application, the static pressure of the gas can be accumulated when passing through the air outlet channel and reaches the maximum value when reaching the outer side of the air outlet channel and is finally converted into wind pressure. Therefore, the wind force blown out through the air outlet holes corresponding to the outer side of the air outlet channel and entering the working area of ​​the inner liner cavity is much greater than that in the prior art. In addition, the air outlet holes corresponding to the outer side of the air outlet channel are also close to the edge of the blower chamber, which makes it easier for the gas entering the working area of ​​the inner liner cavity to flow along the wall of the inner liner, and the gas circulation effect and the temperature uniformity of the inner liner are better.

[0031] See also Figure 4 、 5As shown in Figures 7 and 8, the side wall of the air outlet channel 42 on the side opposite to the volute tongue extends forward in a straight or zigzag manner in a direction perpendicular to the radial direction of the impeller 22. This structural design can prevent the gas from turning due to the inclination of the side wall of the air outlet channel opposite to the volute tongue after it flows out of the impeller chamber and enters the air outlet channel, thereby causing energy loss or vibration. Moreover, the scheme in which the side wall of the air outlet channel opposite to the volute tongue extends forward in a zigzag manner in a direction perpendicular to the radial direction of the impeller is also more conducive to pressurizing the gas through the zigzag side wall of the air outlet channel, further improving the wind force entering the inner liner cavity and the circulation effect of the gas, thereby improving the temperature uniformity of the inner liner. Preferably, the scheme in which the side wall of the air outlet channel opposite to the volute tongue extends forward in a zigzag manner in a direction perpendicular to the radial direction of the impeller includes but is not limited to the side wall itself extending forward in a zigzag manner or having fins formed on the side wall for increasing the wind pressure.

[0032] See also Figure 8 、 9 As shown, concave cavities are formed on the air outlet baffle 3 and the back plate 11. The cross-sections of the concave cavities on the air outlet baffle 3 and the concave cavities on the back plate 11 are both isosceles trapezoidal structures. The concave cavities on the air outlet baffle 3 and the concave cavities on the back plate 11 are matched with each other to form a blast chamber 10. An air outlet strip 300 is also provided on the side wall corresponding to the waist of the isosceles trapezoidal structure of the cross-section of the concave cavity of the air outlet baffle 3. In the present application, a concave cavity is provided on the air outlet baffle and the back plate to form a space for installing components such as an impeller and a guide plate. The concave cavities of the air outlet baffle and the back plate are both isosceles trapezoidal structures, which is conducive to the gas discharged through the air outlet channel to be diverted at the side wall corresponding to the waist of the isosceles trapezoidal structure of the cavity, preventing energy loss and accumulating greater static pressure energy, and ensuring that the gas discharged from the air outlet strip has a greater wind force (even if components such as a heating tube are subsequently installed, the wind force will not be affected by the obstruction of the heating tube). Moreover, the wind force of the air outlet strip is combined with the wind force of the air outlet hole, which can produce a more significant gas circulation effect in the working area of ​​the inner tank cavity and a better temperature uniformity effect. Preferably, the side wall corresponding to the waist of the isosceles trapezoidal structure of the cross-section of the concave cavity of the air outlet baffle 3 has a smaller inclination angle than the side wall corresponding to the waist of the isosceles trapezoidal structure of the cross-section of the concave cavity of the back plate 11, which makes it easier for gas to flow to the air outlet strip 300.

[0033] See also Figure 4 、 5As shown in Figures 7 and 8, the air outlet channel 42 abuts the edge of the blast chamber 10 at the end of the side wall on the side opposite to the volute tongue. The air outlet channel 42 forms a right-angled trapezoidal structure, and the air outlet holes 30 are arranged near the lower base of the right-angled trapezoidal structure. Preferably, the air outlet holes 30 form a rectangular array arranged at intervals on the air outlet baffle 3 at a position close to the lower base of the right-angled trapezoidal structure of the air outlet channel 42. In the present application, the side wall of the air outlet channel on the side opposite to the volute tongue directly abuts the edge of the blast chamber at a vertical angle, which can avoid the need to set up a baffle to form an S-shaped volute, reduce material usage, and have a simple and compact structure. In the present application, the air outlet channel is formed with a right-angled trapezoidal structure. In the process of the gas flowing through the air outlet channel with a right-angled trapezoidal structure, the gas is pressurized and naturally dispersed to the entire width direction of the air outlet channel outlet due to the characteristics of the air outlet channel with a small inlet and a large outlet. It plays a positive role in the all-round gas circulation in the working area of ​​the inner liner cavity. Combined with the air outlet holes distributed in an array, the gas circulation effect in the working area of ​​the inner liner cavity and the temperature uniformity in the inner liner are improved.

[0034] See also Figure 4 、 7 As shown, a heating pipe 6 is also provided in the air outlet channel 42, and the heating pipe 6 is located near the outside of the air outlet channel 42. This structural design not only prevents oil and dirt in the working area of ​​the inner tank cavity from contaminating the heating pipe, but also allows the heat generated by the heating pipe to be directly brought to the working area of ​​the inner tank cavity through the gas flow, resulting in rapid temperature rise and good thermal circulation effect.

[0035] See also Figure 2 、 4 As shown in Figures 7 and 8, one end of the heating tube 6 is inserted into the back plate 11, and the other end of the heating tube 6 is bent and extends along the width of the air outlet channel 42. This structural design allows the heating tube to be laid out as much as possible across the width of the air outlet channel, and the heat of the heating tube can be evenly distributed across the width of the air outlet channel, so that the gas flowing through can carry heat into the working area of ​​the inner tank cavity, thereby improving temperature uniformity and thermal circulation.

[0036] See also Figure 4 、 7 As shown, one end of the heating tube 6 is further provided with a mounting piece 61, and one end of the heating tube 6 is fixed to the back plate 11 through the mounting piece 61. In the present application, the heating tube is fixed to the back plate through the mounting piece, so that the installation of the heating tube is more stable.

[0037] See also Figure 4 、 7 As shown, the heating tube 6 is a U-shaped heating tube.

[0038] See also Figure 1 、 2As shown in Figures 3, 6 and 7, the air baffle 3 is detachably fixedly connected to the back plate 11. Preferably, the air baffle 3 is detachably and tightly connected to the back plate 11 by screws without leaving any gaps.

[0039] See also Figure 1 、 3 As shown in Figures 4 and 7, the air outlet baffle 3 is further provided with an air inlet hole corresponding to the position of the impeller compartment 41.

[0040] Furthermore, a steam oven is provided, which uses the above-mentioned double-blast temperature-equalizing inner tank structure of the steam oven.

[0041] Although the specific embodiments of the present invention have been described above, those skilled in the art may modify them without departing from the spirit and principles of the present invention. The scope of protection of the present invention is defined by the claims and their equivalents.

Claims

1. A dual-blast temperature-equalizing inner liner structure for a steam oven, comprising an inner liner and an air blast assembly disposed on a back plate of the inner liner, an air outlet baffle disposed on the rear side of the inner liner cavity, the air outlet baffle and the back plate forming a blast chamber, characterized in that: The blower assembly includes a guide plate and an impeller located in the blower chamber. The guide plate, the air outlet baffle and the back plate form an S-shaped volute with double volute tongues. The volute includes an impeller compartment and air outlet channels located on both sides of the impeller compartment. The impeller is located at the center of the impeller compartment. The air outlet baffle is provided with air outlet holes corresponding to the outer positions of the air outlet channels in an array along the width direction of the air outlet channel.

2. The double-blast temperature-equalizing inner liner structure of the steam oven according to claim 1, characterized in that: The side wall of the air outlet channel on the side opposite to the volute tongue extends forward straightly or zigzagly along a direction perpendicular to the radial direction of the impeller.

3. The double-blast temperature-equalizing inner liner structure of the steam oven according to claim 1, characterized in that: Both the air outlet baffle and the back plate are formed with a concave cavity, and the cross-sections of the concave cavity on the air outlet baffle and the concave cavity on the back plate are both isosceles trapezoidal structures. The concave cavity on the air outlet baffle and the concave cavity on the back plate are matched with each other to form the blast chamber, and an air outlet strip is also provided on the side wall corresponding to the waist of the isosceles trapezoidal structure of the cross-section of the concave cavity of the air outlet baffle.

4. The double-blast temperature-equalizing inner liner structure of the steam oven according to claim 2, characterized in that: The air outlet channel abuts vertically against the edge of the blast chamber at the end of the side wall on the side opposite to the volute tongue. The air outlet channel forms a right-angled trapezoidal structure, and the air outlet holes are arranged close to the lower bottom edge of the right-angled trapezoidal structure.

5. The double-blast temperature-uniform inner liner structure of the steam oven according to claim 1, characterized in that: A heating pipe is further provided in the air outlet channel, and the heating pipe is close to the outer side of the air outlet channel.

6. The double-blast temperature-equalizing inner container structure of the steam oven according to claim 5, characterized in that: One end of the heating tube is passed through the back plate, and the other end of the heating tube is bent and extends along the width direction of the air outlet channel.

7. The double-blast temperature-uniform inner liner structure of the steam oven according to claim 6, characterized in that: One end of the heating tube is further provided with a mounting piece, and one end of the heating tube is fixed to the back plate through the mounting piece.

8. The double-blast temperature-uniform inner container structure of the steam oven according to any one of claims 5 to 7, characterized in that: The heating tube is a U-shaped heating tube.

9. The double-blast temperature-uniform inner container structure of the steam oven according to claim 1, characterized in that: The air outlet baffle is detachably fixedly connected to the back plate.

10. The double-blast temperature-uniform inner container structure of the steam oven according to claim 1, characterized in that: The air outlet baffle is also provided with an air inlet hole corresponding to the position of the impeller compartment.

11. A steam oven, characterized in that: A double-blast temperature-equalizing inner pot structure of a steam oven as described in any one of claims 1 to 10 is used.

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