Drying oven with circulating air duct

Abstract

The utility model relates to the technical field of drying ovens, and discloses a drying oven with a circulating air duct, which comprises a drying oven bracket internally provided with a plurality of fans, a ventilation hood is arranged on the first side of the drying oven bracket, a heating hood is arranged at the air outlet end of the ventilation hood, and a first circulating inner hood is arranged at the air outlet end of the heating hood; the two first circulation inner covers are symmetrical about the drying oven support and are divided into a plurality of transverse section flow channels and longitudinal section flow channels which are alternately communicated end to end through partition plates, a second circulation inner cover is arranged at the air outlet end of each first circulation inner cover, and air is introduced through the bottom of the drying oven and is heated through an electric heating pipe; and then the fan is used for guiding the flow direction of the airflow, so that the hot air flows back to the area where the bottom electric heating pipe is located through the return channel on one side after reaching the top and is heated again, and the heating pipe for temperature compensation is arranged on the inner side of the oven door, so that the passing air can be heated all the time, and temperature reduction is compensated.

Description

Technical Field

[0001] This application belongs to the field of oven technology and relates to an oven with a circulating air duct. Background Technology

[0002] Circulating air duct drying ovens are widely used in food processing, chemical material drying, and electronic component curing due to their high thermal efficiency and uniform temperature distribution. Traditional drying ovens typically use an axial flow fan combined with a simple U-shaped air duct circulation system, with air heating achieved through a single-stage electric heating element. However, existing technology still has shortcomings in practical applications. For example, the single hot air flow path easily creates uneven temperature areas within the oven, especially in multi-layer structures where the temperature difference between the upper and lower layers is significant, leading to inconsistent drying effects. Similarly, when hot air flows through the material during circulation, its temperature drops due to heat absorption, affecting the drying effect.

[0003] Therefore, how to provide an oven with a circulating air duct that reduces heat loss and maintains a stable temperature inside the oven through closed-loop circulation of hot air has become an urgent technical problem to be solved. Utility Model Content

[0004] To overcome the problems existing in the related technologies, this application aims to provide an oven with a circulating air duct, which can reduce heat loss while maintaining a stable temperature inside the oven.

[0005] This application is achieved through the following technical solution.

[0006] This technical solution provides an oven with a circulating air duct, comprising: an oven support frame with multiple fans inside; a ventilation hood on a first side of the oven support frame; a heating hood at the air outlet end of the ventilation hood; a first circulating inner hood at the air outlet end of the heating hood; two first circulating inner hoods symmetrical about the oven support frame; the two first circulating inner hoods are separated by a partition into multiple transverse and longitudinal flow channels that are alternately connected end to end; and a second circulating inner hood at the air outlet end of the first circulating inner hood, which is connected to the ventilation hood to form a circulating flow channel.

[0007] The heating cover is equipped with an electric heating element;

[0008] The oven support is provided with an oven door at the front and a back baffle at the back.

[0009] Heating tubes are located on the back of the oven door.

[0010] This technical solution guides the airflow with a fan and uses electric heating tubes for heating. After the hot air flows to the top, it flows back to the area where the electric heating tubes are located at the bottom through a return channel on one side for reheating. The oven door is equipped with a supplementary heating tube that can heat the air passing through it to compensate for the temperature drop.

[0011] The present invention is further configured such that a reflector is provided on the back of the oven door to improve the heating efficiency of the heating tube.

[0012] The present invention is further configured such that a thermocouple is provided inside the heating cover for detecting the internal temperature of the heating cover.

[0013] The present invention is further configured such that a thermocouple is provided inside the first circulation inner cover for detecting the internal temperature of the transverse flow channel.

[0014] The present invention is further configured such that a ventilation pipe is provided at the top of the second circulating inner cover, and a butterfly valve is installed inside the ventilation pipe, and the ventilation pipe is used for air exchange.

[0015] The present invention is further provided with heat insulation cotton on the outside of the second circulating inner cover and the outside of the first circulating inner cover near the second side of the oven support.

[0016] The present invention is further configured to include a heat insulation board, which is used to cooperate with the oven door and the back baffle to form the outer shell of the oven.

[0017] The present invention is further configured such that the bottom of the heating cover is provided with multiple sets of support wheels and support feet.

[0018] The present invention is further configured such that the oven support includes multiple wall panels and several support plates disposed on the wall panels for placing items.

[0019] The present invention is further configured such that the heating element is a carbon fiber heating element.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0021] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0022] Figure 1 This is a schematic diagram of the structure shown in one embodiment of this application;

[0023] Figure 2This is a cross-sectional front view shown in one embodiment of this application;

[0024] Figure 3 This is a cross-sectional view shown in one embodiment of this application;

[0025] Figure 4 This is a diagram showing the position of the first circumferential inner cover in one embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the heating cover structure shown in one embodiment of this application;

[0027] Figure 6 This is a schematic diagram of the heating tube installation shown in one embodiment of this application.

[0028] Reference numerals: 1. Oven support; 11. Insulation board; 12. Support wheel; 13. Support foot; 14. Ventilation pipe; 15. Butterfly valve; 16. Insulation cotton; 2. Ventilation hood; 3. Heating hood; 31. Electric heating tube; 4. First circulation inner cover; 41. Partition; 42. Transverse flow channel; 43. Longitudinal flow channel; 5. Second circulation inner cover; 6. Oven door; 61. Reflector; 62. Heating tube; 7. Back baffle; 8. Fan; 9. Thermocouple. Detailed Implementation

[0029] The technical solutions of some embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0031] This embodiment discloses an oven with a circulating air duct, such as... Figures 1-6 As shown, it includes: an oven support 1 with multiple fans 8 inside; a ventilation hood 2 on the first side of the oven support 1; a heating hood 3 at the air outlet of the ventilation hood 2; a first circulation inner cover 4 at the air outlet of the heating hood 3; two first circulation inner covers 4 symmetrical about the oven support 1; the two first circulation inner covers 4 are separated by a partition 41 into multiple transverse flow channels 42 and longitudinal flow channels 43 that are connected end to end; a second circulation inner cover 5 at the air outlet of the first circulation inner cover 4 is provided; the second circulation inner cover 5 is connected to the ventilation hood 2 to form a circulation channel.

[0032] The heating cover 3 is equipped with an electric heating element 31 inside;

[0033] The oven support 1 has an oven door 6 at the front and a back baffle 7 at the back.

[0034] Heating tubes 62 are provided on the back of the oven door 6.

[0035] It should be noted that the air inlet of the ventilation hood 2 is equipped with an air inlet size adjustment plate to adjust the air intake. The air outlet refers to the end where the air outlet is located. The air is driven by the fan and enters from the air inlet of the ventilation hood 2, flows into the interior of the heating hood 3, is heated by the electric heating tube 31, and then enters the set transverse flow channel 42 and longitudinal flow channel 43. When passing through the transverse flow channel 42, the items placed on the drying rack here can be dried. During the heat exchange process, the thermocouple 9 detects the air temperature of the monitoring area in real time, so that when the temperature is lower than the preset, heat compensation is performed through the heating tube 62 set on the back of the oven door 6.

[0036] like Figure 6 As shown, a reflector 61 is provided on the back of the oven door 6 to improve the heating efficiency of the heating tube 62.

[0037] like Figure 1 and Figure 6 As shown, a thermocouple 9 is provided inside the heating cover 3 to detect the internal temperature of the heating cover 3.

[0038] like Figure 1 and Figure 6 As shown, the first circulation inner cover 4 is equipped with a thermocouple 9 for detecting the internal temperature of the transverse flow channel 42.

[0039] It should be noted that when the thermocouple 9 detects that the internal temperature of the first cycle inner cover 4 is lower than the preset minimum temperature, the heating tube 62 on the back of the oven door is activated to heat the air in order to complete the air temperature compensation.

[0040] like Figures 1-3 As shown, the top of the second circulation inner cover 5 is provided with a ventilation pipe 14, and a butterfly valve 15 is installed inside the ventilation pipe 14. The ventilation pipe 14 is used for ventilation.

[0041] like Figure 2 As shown, the exterior of the second circulating inner cover 5 and the exterior of the first circulating inner cover 4, which is close to the second side of the oven support 1, are both provided with heat insulation cotton 16.

[0042] like Figure 1 and Figure 3 As shown, it also includes an insulation board 11, which is used to cooperate with the oven door 6 and the back baffle 7 to form the outer shell of the oven.

[0043] It should be noted that the installation of heat insulation cotton 16 and heat insulation board 11 can reduce the rate of temperature loss inside the oven and improve thermal efficiency.

[0044] like Figure 1As shown, the bottom of the heating cover 3 is provided with multiple sets of support wheels 12 and support feet 13.

[0045] like Figure 2 and Figure 3 As shown, the oven support 1 includes multiple wall panels and several support plates disposed on the wall panels for placing items.

[0046] like Figures 1-6 As shown, heating element 31 is a carbon fiber heating element.

[0047] Working principle: Air is drawn in through the air inlet of the ventilation hood 2 by a fan, flows into the heating hood 3, is heated by the electric heating tube 31, and then enters the set transverse flow channel 42 and longitudinal flow channel 43. When passing through the transverse flow channel 42, the items placed on the drying rack can be dried. During the heat exchange process, the thermocouple 9 detects the air temperature of the monitoring area in real time. When the temperature is lower than the preset value, the heating tube 62 set on the back of the oven door 6 is activated to compensate for the heat and maintain the temperature inside the circulating air channel, thereby improving the drying quality.

[0048] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An oven with a circulating air duct, characterized in that, include: An oven support (1) with multiple fans (8) inside is provided. A ventilation hood (2) is provided on the first side of the oven support (1). A heating hood (3) is provided at the air outlet end of the ventilation hood (2). A first circulation inner hood (4) is provided at the air outlet end of the heating hood (3). The first circulation inner hood (4) has two symmetrical ones about the oven support (1). The two first circulation inner hoods (4) are separated by a partition (41) into multiple transverse flow channels (42) and longitudinal flow channels (43) that are connected end to end. A second circulation inner hood (5) is provided at the air outlet end of the first circulation inner hood (4). The second circulation inner hood (5) is connected to the ventilation hood (2) to form a circulation channel. The heating cover (3) is equipped with an electric heating tube (31); The oven support (1) is provided with an oven door (6) at the front and a back baffle (7) at the back. The oven door (6) is equipped with a heating tube (62) on the back.

2. The drying oven with a circulating air duct according to claim 1, characterized in that, The oven door (6) is provided with a reflector (61) on the back to improve the heating efficiency of the heating tube (62).

3. The drying oven with a circulating air duct according to claim 1, characterized in that, The heating cover (3) is equipped with a thermocouple (9) inside, which is used to detect the internal temperature of the heating cover (3).

4. The drying oven with a circulating air duct according to claim 1, characterized in that, The first circulation inner cover (4) is equipped with a thermocouple (9) for detecting the internal temperature of the transverse flow channel (42).

5. The drying oven with a circulating air duct according to claim 1, characterized in that, The top of the second circulation inner cover (5) is provided with a ventilation pipe (14), and a butterfly valve (15) is installed inside the ventilation pipe (14). The ventilation pipe (14) is used for ventilation.

6. The drying oven with a circulating air duct according to claim 1, characterized in that, The exterior of the second circulating inner cover (5) and the exterior of the first circulating inner cover (4) which is close to the second side of the oven support (1) are both provided with heat insulation cotton (16).

7. The drying oven with a circulating air duct according to claim 1, characterized in that, It also includes an insulation board (11), which is used to cooperate with the oven door (6) and the back baffle (7) to form the outer shell of the oven.

8. The drying oven with a circulating air duct according to claim 1, characterized in that, The bottom of the heating cover (3) is provided with multiple sets of support wheels (12) and support feet (13).

9. The drying oven with a circulating air duct according to claim 1, characterized in that, The oven rack (1) includes multiple wall panels and several support plates on the wall panels for placing items.

10. The drying oven with a circulating air duct according to claim 1, characterized in that, The heating element (31) is a carbon fiber heating element.

Images