A bread production oven

Abstract

The utility model discloses a kind of oven for bread production, and multiple upper radiation heating elements are arranged on the top of upper heating cavity, multiple upper convection elements are installed below it, the upper convection element is arranged obliquely along the conveying direction of baking tray, and the oblique direction of adjacent upper convection element is opposite;Multiple lower radiation heating elements are arranged on the bottom of lower heating cavity, multiple lower convection elements are installed above it, and the lower convection element is arranged in parallel along the conveying direction of baking tray;Upper convection element, lower convection element are all connected with air supply device and independently control flow by valve;The oblique direction of adjacent upper convection pipe is opposite, forms airflow vortex to enhance heat exchange;Mixed airflow is formed in oven by convection unit, recycle utilization oven heat, reduce energy consumption;Convection unit adjusts blowing area by valve, adapt to the baking demand of multiple specifications of bread.

Description

Technical Field

[0001] This utility model relates to the field of oven technology, specifically an oven for bread production. Background Technology

[0002] Traditional bread ovens commonly suffer from uneven internal temperature distribution during baking, affecting the quality of the finished product. Due to the large volume of the oven, the rate of heat diffusion varies significantly in different areas. Bread surfaces near high-temperature areas develop charred spots due to overheating, while some areas are undercooked, resulting in uneven texture and color. Utility Model Content

[0003] The purpose of this invention is to solve the problem of uneven temperature distribution inside existing ovens.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A bread-making oven includes an oven, a baking tray conveying device, radiant heating elements, and a convection unit. The convection unit includes convection elements, an air supply device, and valves. The oven is characterized by being divided into an upper heating chamber and a lower heating chamber. Multiple upper radiant heating elements are installed at the top of the upper heating chamber, with multiple upper convection elements installed below them. The upper convection elements are arranged obliquely along the baking tray conveying direction, and adjacent upper convection elements have opposite oblique directions. Multiple lower radiant heating elements are installed at the bottom of the lower heating chamber, with multiple lower convection elements installed above them. The lower convection elements are arranged parallel along the baking tray conveying direction. Both the upper and lower convection elements are connected to an air supply device, and their flow rates are independently controlled by valves.

[0006] Furthermore, an insulation layer is provided on the inside of the furnace door, and an elastic buffer layer is covered on the side of the furnace door insulation layer closest to the furnace cavity.

[0007] Furthermore, the convection element is a convection tube, with an upper air-blowing hole on the surface of the upper convection tube and a lower air-blowing hole on the surface of the lower convection tube. The upper air-blowing holes of adjacent upper convection tubes are arranged alternately, and the lower air-blowing holes of adjacent lower convection tubes are arranged alternately.

[0008] Furthermore, the diameter of the upper air blowing hole is 4mm to 6mm, and the diameter of the lower air blowing hole is 5mm to 8mm.

[0009] Furthermore, the airflow velocity of the upper air outlet is 8 m / s to 12 m / s, and the airflow velocity of the lower air outlet is 5 m / s to 8 m / s.

[0010] Furthermore, each of the convection elements is provided with an air supply device on both sides, and the air supply device is connected to the convection element through an air duct.

[0011] Furthermore, the radiant heating element is an infrared quartz tube.

[0012] Furthermore, the baking tray conveying device is a roller conveyor, and the roller conveyor is a high-temperature resistant ceramic roller conveyor.

[0013] Furthermore, the elastic buffer layer is an aluminum silicate buffer layer, which is located between the insulation layer and the furnace door steel plate.

[0014] Furthermore, the air supply device is a high-temperature fan.

[0015] Beneficial effects

[0016] The reverse-sloping airflow from the upper convection element collides at the confluence point, breaking up the laminar flow and forming a three-dimensional turbulent flow that covers the entire baking pan area, avoiding temperature blind spots and improving heat transfer efficiency. The lower convection elements are arranged in parallel, and the parallel airflow can stably support the water vapor at the bottom, preventing moisture retention and causing the bottom to collapse. The convection unit forms a mixed airflow inside the oven, recycling the heat inside the oven and reducing energy consumption. The convection unit adjusts the blowing area through valves to adapt to the baking needs of various bread sizes. Attached Figure Description

[0017] Figure 1 This is a front view of the bread-making oven proposed in this utility model;

[0018] Figure 2 This is a side view of the bread-making oven proposed in this utility model;

[0019] Figure 3 Top view of the upper convection pipe arrangement;

[0020] Figure 4 A bottom view showing the arrangement of the lower convection pipes.

[0021] Figure Labels

[0022] 1. Oven, 2. Oven door lifting mechanism, 31. Oven internal insulation layer, 32. Oven door insulation layer, 4. Convection element, 41.

[0023] 42. Upper convection pipe, 5. Lower convection pipe, 6. Radiant heating element, 7. Upper heating pipe, 8. Lower heating pipe, 9. Baking tray, 10. Bread, 11. Roller conveyor, 12. Air supply device, 13. Upper air supply device, 14. Lower air supply device, 15. Valve, 16. Air duct, 17. Upper air outlet, 18. Lower air outlet, 19. Elastic buffer layer, 10. Roller conveyor drive shaft, 11. Air supply device drive shaft. Detailed Implementation

[0024] To clearly illustrate the design concept of this utility model, the following description is provided in conjunction with examples.

[0025] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the examples of the present invention. Obviously, the described examples are only a part of the examples of the present invention, and not all of them. Based on the examples of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0026] In the description of this embodiment, the orientation or positional relationship indicated by the terms is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0027] refer to Figure 1-4 This utility model provides a bread-making oven, including an oven 1, a baking tray conveying device, a radiant heating element 5, and a convection unit. The convection unit includes a convection element 4, an air supply device 9, and a valve 10. Each convection element 4 has an air supply device 9 on both sides, and the air supply device 9 is connected to the convection element 4 through an air duct 11. Figure 3 , Figure 4A valve 10 is installed on the branch of the air duct 11 to control the airflow of the convection element 4. The oven 1 is divided into an upper heating chamber and a lower heating chamber. Multiple upper radiant heating elements are installed at the top of the upper heating chamber, and multiple upper convection elements are installed below them. The upper convection elements are arranged at an angle along the conveying direction of the baking tray 6, and the angles of adjacent upper convection elements are opposite. Multiple lower radiant heating elements are installed at the bottom of the lower heating chamber, and multiple lower convection elements are installed above them. The lower convection elements are arranged parallel along the conveying direction of the baking tray 6. Both the upper and lower convection elements are connected to an air supply device 9 and their flow rates are independently controlled by the valve 10. The convection unit adjusts the blowing area according to the size of the bread in the oven 1 through the valve 10 to ensure that the blowing surface can cover the bread on the baking tray 6. For smaller breads, the blowing area is reduced to reduce energy consumption. In this embodiment, the radiant heating element 5 is an infrared quartz tube, including an upper heating tube 51 and a lower heating tube 52; the baking tray conveyor is a roller conveyor, the roller conveyor 8 is a high-temperature resistant ceramic roller conveyor, the roller conveyor drive shaft 14 extends out of the furnace insulation layer 31, and the first motor (not shown in the figure) outside the oven 1 drives the roller conveyor drive shaft 14 to rotate, thereby driving the roller conveyor 8 to rotate; the air supply device 9 is a high-temperature fan, the air supply device drive shaft 15 extends out of the furnace insulation layer 31, and the second motor (not shown in the figure) outside the oven 1 drives the air supply device drive shaft 15 to rotate, thereby driving the blades of the high-temperature fan inside the oven 1 to work; the oven cavity is provided with an furnace insulation layer 31, and the inner side of the oven door is provided with an oven door insulation layer 32, and the side of the oven door insulation layer 32 near the oven cavity is covered with an elastic buffer layer 13; the elastic buffer layer 13 between the oven door insulation layer 32 and the oven door steel plate is preferably an aluminum silicate buffer layer with a density ≥200kg / m³. 3 Its resilience is >90%, absorbing the vibration and impact during the lifting and lowering of the furnace door, preventing the insulation layer from undergoing plastic deformation due to instantaneous pressure. The convection element is a convection tube; the upper convection tube 41 has an upper air blowing hole 121 on its surface, and the lower convection tube 42 has a lower air blowing hole 122 on its surface. Figure 3 , Figure 4 As shown, the upper air holes 121 of adjacent upper convection pipes 41 are arranged in an alternating pattern, and the lower air holes 122 of adjacent lower convection pipes 42 are arranged in an alternating pattern, improving the uniformity of airflow within the oven 1. The diameter of the upper air holes 121 is 4mm to 6mm, and the diameter of the lower air holes 122 is 5mm to 8mm. The airflow velocity of the upper air holes 121 is 8m / s to 12m / s, and the airflow velocity of the lower air holes 122 is 5m / s to 8m / s. That is, the upper air holes 121 are small-diameter holes with high flow velocity, and the lower air holes 122 are large-diameter holes with low flow velocity. This can create high-speed turbulence in the upper heating cavity, effectively tearing apart the static air boundary layer on the bread surface and improving the efficiency of heat transfer. A uniform air cushion layer supporting water vapor is formed in the lower heating cavity to prevent heat accumulation at the bottom and prevent softening.

[0028] During operation, bread 7 is fed into oven 1 via roller conveyor 8. The upper heating pipe 51 of the upper heating chamber is activated, and the upper convection pipes 41 are arranged at an angle with adjacent upper convection pipes 41 tilting in opposite directions. The ejected airflow mixes with radiant heat and impacts the upper surface of the bread. The lower heating pipes 52 of the lower heating chamber heat simultaneously, and the parallel lower convection pipes 42 eject air upwards to ensure that the bottom of the bread is heated evenly. The opening of valve 10 is adjusted based on the size and specifications of the bread to optimize the airflow coverage, ensuring that the blowing area completely covers the bread on the baking tray 6 and avoiding unloaded airflow.

[0029] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this application.

[0030] Finally, it is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the principles and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A bread-making oven, comprising an oven, a baking tray conveying device, a radiant heating element, and a convection unit, wherein the convection unit includes a convection element, an air supply device, and valves; characterized in that: The oven is divided into an upper heating chamber and a lower heating chamber. The upper heating chamber is equipped with multiple upper radiant heating elements at the top and multiple upper convection elements below them. The upper convection elements are arranged at an angle along the baking tray conveying direction, and the angles of adjacent upper convection elements are opposite. The lower heating chamber is equipped with multiple lower radiant heating elements at the bottom and multiple lower convection elements are installed above them. The lower convection elements are arranged parallel along the baking tray conveying direction. Both the upper and lower convection elements are connected to an air supply device, and the flow rate is independently controlled by a valve.

2. The bread-making oven according to claim 1, characterized in that: The inside of the furnace door is equipped with a furnace door insulation layer, and the side of the furnace door insulation layer closest to the furnace cavity is covered with an elastic buffer layer.

3. The bread-making oven according to claim 1, characterized in that: The convection element is a convection tube. The upper convection tube has an upper air blowing hole on its surface, and the lower convection tube has a lower air blowing hole on its surface. The upper air blowing holes of adjacent upper convection tubes are arranged alternately, and the lower air blowing holes of adjacent lower convection tubes are arranged alternately.

4. The bread-making oven according to claim 3, characterized in that: The diameter of the upper air blowing hole is 4mm to 6mm, and the diameter of the lower air blowing hole is 5mm to 8mm.

5. The bread-making oven according to claim 4, characterized in that: The airflow velocity of the upper air outlet is 8 m / s to 12 m / s, and the airflow velocity of the lower air outlet is 5 m / s to 8 m / s.

6. The bread-making oven according to claim 3, characterized in that: Each of the convection elements is provided with an air supply device on both sides, and the air supply device is connected to the convection element through an air duct.

7. The bread-making oven according to claim 1, characterized in that: The radiant heating element is an infrared quartz tube.

8. The bread-making oven according to claim 1, characterized in that: The baking tray conveyor is a roller conveyor, and the roller conveyor is a high-temperature resistant ceramic roller conveyor.

9. The bread-making oven according to claim 2, characterized in that: The elastic buffer layer is an aluminum silicate buffer layer, which is located between the insulation layer and the furnace door steel plate.

10. The bread-making oven according to claim 1, characterized in that: The air supply device is a high-temperature fan.

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