CN209978535U

CN209978535U - Hot air oven

Info

Publication number: CN209978535U
Application number: CN201920688157.6U
Authority: CN
Inventors: 王岩
Original assignee: Hefei Shuomei Melamine Products Co Ltd
Current assignee: Hefei Shuomei Melamine Products Co Ltd
Priority date: 2019-05-14
Filing date: 2019-05-14
Publication date: 2020-01-21
Anticipated expiration: 2029-05-14

Abstract

The utility model relates to the field of material drying and drying boxes, and discloses a hot air oven, which comprises a box body, a dehumidifying fan, a first fan, a second fan and a heating device, wherein the first fan is arranged at the upper left position of the top of the box body; a moisture exhaust fan is arranged at the top of the box body and positioned at the upper right part; a drying chamber is arranged at the bottom in the box body; a second fan is arranged in the box body, close to the right side of the drying chamber and positioned at the top of the drying chamber; a humidity sensor is arranged on the upper surface of the box body and close to the moisture exhaust fan; a heating device is arranged on the left side wall in the box body; the left side wall of the drying chamber is provided with air guide openings with right trapezoid cross sections at intervals, and the right side wall of the drying chamber is provided with air outlet openings with rectangular cross sections at intervals. The utility model has the advantages of it is following and effect: it can make hot-blast distribution even, and the stoving effect is better.

Description

Hot air oven

Technical Field

The utility model relates to a material drying stoving case field, in particular to hot air oven.

Background

The hot air circulation oven is suitable for heating, curing, drying and dehydrating materials in the industries of medicine, chemical industry, food, agricultural and sideline products, aquatic products, light industry and the like, and the basic principle is that steam or electricity is used as a heat energy source, a steam radiator or an electric heating element generates heat, a fan is used for carrying out heat convection, heat transfer is carried out on the materials, and fresh air and humid air are continuously supplemented and exhausted. The hot air circulation oven has two air supply modes, namely a vertical air supply mode and a horizontal air supply mode. In the vertical air supply mode, the fan is designed at an upper air duct or a lower air duct to supply air from bottom to top or from top to bottom, two baffles are arranged at two sides of the heat preservation layer and the working chamber to form the upper air duct and the lower air duct, and no air leakage exists on the baffles, so that a circulating air duct is formed between the heat preservation layer and the working chamber, and the design is used for materials which do not need baking trays. The horizontal air supply mode is characterized in that an upper air duct forms air flow, a convection wall is designed between the heat preservation layer and the working chamber, and the convection wall is provided with an air leakage opening with a slight angle, so that a horizontal air direction from left to right or from right to left is formed.

At present, the chinese utility model patent with publication number CN204757560U discloses a hot air circulation oven, which comprises a box body, an oven, a circulation system, a hot air main pipe, a hot air branch pipe, a moisture exhaust port, a moisture exhaust fan, a drying vehicle and a drying tray; the box body is internally provided with partition plates to form 4 drying ovens; a moisture exhaust port is arranged at the center of the upper part of the box body, and a moisture exhaust fan is arranged at the moisture exhaust port; the circulating system comprises a circulating pipe A, a water collecting tank, a circulating pipe B and a heater; one end of the circulating pipe A is connected with the dehumidifying fan, and the other end of the circulating pipe A is connected with an inlet of the water collecting tank; one end of the circulating pipe B is connected with an outlet of the water collecting tank, and the other end of the circulating pipe B is connected with the hot air main pipe; one end of the circulating pipe B connected with the hot air main pipe is provided with a heater.

Above-mentioned technical scheme can carry out reasonable circulation with the damp and hot air in the box, and energy-conserving and reduce cost, nevertheless have following defect: when the hot air is circulated for drying, the drying effect is not good due to uneven air flow.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a hot-blast oven, it can make hot-blast distribution even, and the stoving effect is better.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a hot air oven comprises a box body, a moisture removing fan, a first fan and a heating device, wherein the first fan is arranged at the upper left position of the top of the box body; a moisture exhaust fan is arranged at the upper right position of the top of the box body; a drying chamber is arranged at the bottom in the box body; a second fan is arranged in the box body, close to the right side of the drying chamber and positioned at the top of the drying chamber; a left air duct and a right air duct are respectively arranged on two sides of the drying chamber; the interior of the box body and the top of the drying chamber are separated to form an upper air duct; a humidity sensor is arranged on the upper surface of the upper air channel of the box body and close to the moisture exhaust fan; the first fan, the second fan and the moisture exhausting fan are all communicated with the upper air duct; a heating device is arranged on the left side wall in the box body and close to the drying chamber; the side wall of the drying chamber close to the left air duct is provided with air guide openings with right trapezoid cross sections at intervals, the side wall of the drying chamber close to the right air duct is provided with air outlets with rectangular cross sections at intervals, and air openings of the air outlets are larger than those of the air guide openings.

By adopting the technical scheme, under the same wind power inlet speed, the uniformity diffusion of the airflow is different due to different inlet airflow air inlet angles. The pressure at the center of the tuyere is minimum, the speed of the air flow is maximum, the pressure around the tuyere is gradually increased, the speed is gradually reduced, and the uniformity of the air flow is greatly influenced. The air inlet airflow of the airflow is very small by adopting the gradually-changed opening, and the airflow far away from the center is larger than the airflow of the air inlet with the rectangular cross section, so that the non-uniformity of the airflow can be better compensated by the gradually-changed holes with the right-angle trapezoidal cross sections under the condition of the same inlet airflow. Obvious vortex is generated below the inlets with the rectangular cross sections and the conical cross sections, and the vortex phenomenon does not exist for the right trapezoid, so that the air flow achieves the best effect. The first fan sends external air into the box body, the air heated by the heating device enters the drying chamber through the air guide opening with the right trapezoid cross section, due to the shape of the cross section of the air guide opening, the hot air uniformly dries materials on the drying rack, the hot air enters the air inlet of the second fan through the air outlet, the air outlet of the second fan performs secondary circulation on the hot air coming out of the drying chamber, the hot air in the upper air channel passes through the humidity sensor, and if the humidity in the hot air reaches a high humidity set value of the humidity sensor, the humidity sensor responds to enable the dehumidifying fan to work, the hot air is dehumidified, and the dryness of the hot air is ensured; when the humidity in the hot air is reduced to the low humidity set value of the humidity sensor, the humidity sensor responds to stop the work of the moisture exhaust fan. Because the air current when flowing in the drying chamber, the resistance that influences the air current and flows is inversely proportional with the size in wind gap, sets up the wind gap size of air exit for being greater than the wind gap size of wind-guiding mouth, is favorable to reducing the wind-force resistance in the drying chamber for hot-blast flow is more smooth and easy even.

The utility model is further arranged that the air inlet of the dehumidifying fan extends into the upper air passage position in the box body through the first dehumidifying pipeline; and the air outlet of the dehumidifying fan is communicated with the outside of the box body through a second dehumidifying pipeline.

Through adopting above-mentioned technical scheme, stretch into the box through first hydrofuge pipeline in, with last wind channel intercommunication, the realization can be to through last wind channel and too moist circulating hot-blast hydrofuge of taking out, arrange the box outside with second hydrofuge pipeline in, the hot-blast discharge that will be too moist.

The utility model is further arranged that the air inlet of the first fan is communicated with the outside of the box body through a first pipeline; the air outlet of the first fan is communicated with the upper air duct through a second pipeline, and the pipe orifice of the second pipeline faces the left air duct; an air inlet of the second fan is communicated with the right air duct through a third pipeline; and the air outlet of the second fan is communicated with the upper air duct through a fourth pipeline.

Through adopting above-mentioned technical scheme, stretch out the box outside with the extraction air admission box with first pipeline in, the mouth of pipe of second pipeline is towards left wind channel, and the first fan of rethread is with wind direct blowing in left wind channel, makes its distance that gets into the drying chamber short, and drying efficiency is higher. The third pipeline of the second fan is communicated with the right air channel, so that hot air at the air outlet can be discharged, and then the hot air is fed into the upper air channel through the fourth pipeline, and hot air circulation is realized.

The utility model is further provided with that the box body comprises an outer shell and an inner shell which has a gap with the outer shell; and a heat insulation material is filled between the outer shell and the inner shell.

Through adopting above-mentioned technical scheme, set up the box into bilayer structure to fill in the centre and be full of insulation material, make the inside heat of box be difficult for effluvium, make heated air circulation's effect better.

The utility model discloses further set up to, the box door is provided with the rubber pad with the part of box contact.

Through adopting above-mentioned technical scheme, spill from the crack in order to prevent hot-blast, guarantee the leakproofness in the box, play heat retaining effect.

The utility model is further provided with an alarm device arranged on the outer side wall of the box body and positioned at the upper right part of the box body; and a temperature sensor electrically connected with the alarm device is arranged in the drying chamber.

Through adopting above-mentioned technical scheme, set up temperature sensor in the drying chamber inside, monitor the temperature in the drying chamber, through electric connection alarm device, play safety protection's effect.

The utility model is further arranged that a drying rack is arranged on the bottom wall in the drying chamber; the bottom of the drying rack is provided with a pulley; and a groove matched with the pulley of the drying rack is formed in the bottom wall in the drying chamber.

By adopting the technical scheme, the groove matched with the pulley of the drying rack is arranged, and the position of the drying rack is limited for better placing the drying rack.

The utility model discloses further set up to, the air intake department of first fan is equipped with the filter.

Through adopting above-mentioned technical scheme, set up the filter in the air intake department of first fan, prevent effectively that the intake air from getting into the box and mixing there is impurity.

To sum up, the utility model discloses a beneficial technological effect does:

1. under the same wind power inlet speed, because the inlet airflow inlet angles are different, the uniformity diffusion of the airflow is different, the pressure at the center of the air port is minimum, the speed of the airflow is highest, the pressure at the periphery of the air port is gradually increased, the speed is gradually reduced, and the uniformity of the airflow is greatly influenced. The air inlet airflow of the airflow is very small by adopting the air opening with the gradually-changed holes, and the airflow far away from the center is larger than the airflow of the air opening with the rectangular cross section, so that the gradually-changed holes with the right-angle trapezoidal cross section can better compensate the nonuniformity of the airflow under the condition of the same inlet airflow, obvious vortex is generated below the inlets with the rectangular cross section and the conical cross section, and the vortex phenomenon does not exist in the right-angle trapezoidal shape, so that the airflow achieves the best effect;

2. the first fan sends external air into the box body, the air heated by the heating device enters the drying chamber through the air guide opening with the right trapezoid cross section, due to the shape of the cross section of the air guide opening, the hot air uniformly dries materials on the drying rack, the hot air enters the air inlet of the second fan through the air outlet, the air outlet of the second fan performs secondary circulation on the hot air coming out of the drying chamber, the hot air in the upper air channel passes through the humidity sensor, and if the humidity in the hot air reaches a high humidity set value of the humidity sensor, the humidity sensor responds to enable the dehumidifying fan to work, the hot air is dehumidified, and the dryness of the hot air is ensured; when the humidity in the hot air is reduced to the low humidity set value of the humidity sensor, the humidity sensor responds to stop the work of the moisture exhaust fan. Because the resistance influencing the flow of the air flow is inversely proportional to the size of the air opening when the air flow flows in the drying chamber, the size of the air opening of the air outlet is larger than that of the air guide opening, which is beneficial to reducing the wind resistance in the drying chamber and ensuring that the flow of the hot air is smoother and more uniform;

3. a temperature sensor is arranged in the drying chamber to monitor the temperature in the drying chamber, and the temperature sensor is electrically connected with an alarm device to play a role in safety protection;

4. in stretching into the box through the first hydrofuge pipeline with hydrofuge fan, with last wind channel intercommunication, the realization can be to through last wind channel and too moist circulating hot-blast take out the hydrofuge, arrange the box outside with second hydrofuge pipeline in, will too moist hot-blast discharge.

Drawings

FIG. 1 is a schematic view of the overall structure of the embodiment;

FIG. 2 is a schematic view of the internal structure of the embodiment;

FIG. 3 is a schematic view of an air guiding opening according to an embodiment;

FIG. 4 is a schematic view of the structure of the exhaust outlet according to the embodiment.

Reference numerals: 1. a box body; 11. a housing; 12. an inner shell; 13. a thermal insulation material; 14. an alarm device; 15. an upper air duct; 16. a left air duct; 17. a right air duct; 18. a humidity sensor; 19. a box door; 2. a moisture removal fan; 21. a first moisture removal conduit; 22. a second moisture removal conduit; 3. a first fan; 31. a first conduit; 32. a second conduit; 33. a filter; 4. a second fan; 41. a third pipeline; 42. a fourth conduit; 5. a heating device; 6. a drying chamber; 61. a wind guide opening; 62. an air outlet; 63. a temperature sensor; 64. a groove; 7. a drying rack; 71. a pulley.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the hot air oven comprises an oven body 1, a double-open type oven door 19 hinged in front of the oven body 1, a first fan 3 and a dehumidifying fan 2 installed at the top of the oven body 1, a drying chamber 6 installed in the oven body 1, and an alarm device 14 fixedly installed at the right side outside the oven body 1 and close to the upper side of the oven body. The contact part of the door of the box body 1 and the box body 1 is provided with a rubber pad.

As shown in fig. 2, the case 1 includes an outer case 11 made of a metal material and an inner case 12 having a gap with the outer case 11. And a heat insulation material 13 is filled between the outer shell 11 and the inner shell 12, and the heat insulation material 13 is high-density aluminum silicate cotton. The bottom of the inner shell 12 of the box body 1 is fixedly provided with a drying chamber 6. The heating device 5 is fixedly installed at the left side wall of the inner casing 12 and near the drying chamber 6.

The drying chamber 6 is rectangular, a space is reserved between the top of the drying chamber and the inner shell 12, and a space is reserved between the two sides of the drying chamber 6 and the two sides of the inner shell 12. The space between the drying chamber 6 and the top of the inner shell 12 forms an upper air duct 15, and the space between the two sides of the drying chamber 6 and the two sides of the inner shell 12 forms a left air duct 16 and a right air duct 17 respectively. The side wall of the drying chamber 6 located on the left air duct 16 is provided with air guiding ports 61 (shown in fig. 3) with right trapezoid cross sections at intervals from top to bottom, the side wall of the drying chamber 6 located on the right air duct 17 is provided with air discharging ports 62 (shown in fig. 4) with rectangular cross sections at intervals from top to bottom, and the air ports of the air discharging ports 62 are larger than the air ports of the air guiding ports 61. A temperature sensor 63 electrically connected with the alarm device 14 is arranged at the top of the drying chamber 6 and close to the middle.

As shown in fig. 1, a drying rack 7 is placed in the drying chamber 6, and a pulley 71 is attached to a lower end of the drying rack 7. The inner bottom wall of the drying chamber 6 is provided with a groove 64 matched with the pulley 71, and the length direction of the groove 64 penetrates through the front and the back of the box body 1.

As shown in fig. 2, the first fan 3 is fixedly installed at the top of the inner casing 12 and near the left side of the box 1. The air inlet of the first fan 3 is communicated with the outside of the box body 1 through a first pipeline 31, a filter 33 is installed at the air inlet of the first fan 3, the air outlet of the first fan 3 is communicated with the upper air duct 15 through a second pipeline 32, and the pipe orifice of the second pipeline 32 faces the left side of the drying chamber 6.

The second fan 4 is fixedly installed at the right side wall of the inner casing 12 and near the top of the drying chamber 6. The air inlet of the second fan 4 is communicated with the right air duct 17 through a third pipeline 41, and the air outlet of the second fan 4 is communicated with the upper air duct 15 through a fourth pipeline 42.

The dehumidifying fan 2 is fixedly arranged at the top of the inner shell 12 and close to the right side of the box body 1. An air inlet of the dehumidifying fan 2 extends into the box body 1 through a first dehumidifying pipeline 21, and an air outlet of the dehumidifying fan 2 is communicated with the outside of the box body 1 through a second dehumidifying pipeline 22.

In the embodiment, when in use, the first fan 3 sends outside air into the box body 1 through the first pipeline 31, the air sends air into the left air duct 16 through the second pipeline 32, the air heated by the heating device 5 arranged in the left air duct 16 enters the drying chamber 6 through the air guide opening 61 with a right trapezoid cross section, due to the cross section shape of the air guide opening 61, the hot air dries the material on the drying rack 7 more uniformly, the hot air enters the air inlet of the second fan 4 through the air outlet 62, the air outlet of the second fan 4 performs secondary circulation on the hot air coming out of the drying chamber 6, the hot air in the upper air duct 15 passes through the humidity sensor 18, if the humidity in the hot air reaches the high humidity set value of the humidity sensor 18, the humidity sensor 18 responds to enable the humidity exhaust fan 2 to work to dehumidify the hot air, the dryness of the hot air is ensured; when the humidity in the hot air drops to the low humidity set value of the humidity sensor 18, the humidity sensor 18 responds to stop the operation of the dehumidifying fan 2. The high humidity set point is typically set at 50% to 80% and the low humidity set point is set at 20% to 40%. When the temperature in the drying chamber 6 reaches a set value, the temperature sensor 63 responds, and the alarm device 14 is started to play a safety protection role.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a hot-blast oven, includes box (1), hydrofuge fan (2), first fan (3), heating device (5), characterized by: a first fan (3) is arranged at the top of the box body (1) and above the left side; a moisture exhaust fan (2) is arranged at the top of the box body (1) and is positioned at the upper right part; a drying chamber (6) is arranged at the bottom in the box body (1); a second fan (4) is arranged in the box body (1) close to the right side of the drying chamber (6) and at the top of the drying chamber (6); a left air duct (16) and a right air duct (17) are respectively arranged on two sides of the drying chamber (6); the interior of the box body (1) is separated from the top of the drying chamber (6) to form an upper air duct (15); a humidity sensor (18) is arranged on the upper surface of the upper air duct (15) of the box body (1) and close to the moisture exhaust fan (2); the first fan (3), the second fan (4) and the moisture exhausting fan (2) are all communicated with the upper air duct (15); a heating device (5) is arranged on the left side wall in the box body (1) and close to the drying chamber (6); the side wall of the drying chamber (6) close to the left air duct (16) is provided with air guide openings (61) with right trapezoid cross sections at intervals, the side wall of the drying chamber (6) close to the right air duct (17) is provided with air outlets (62) with rectangular cross sections at intervals, and air openings of the air outlets (62) are larger than those of the air guide openings (61).

2. A hot air oven as claimed in claim 1, characterized in that: an air inlet of the moisture exhausting fan (2) extends into the position of an upper air duct (15) in the box body (1) through a first moisture exhausting pipeline (21); and an air outlet of the moisture exhausting fan (2) is communicated with the outside of the box body (1) through a second moisture exhausting pipeline (22).

3. A hot air oven as claimed in claim 1, characterized in that: an air inlet of the first fan (3) is communicated with the outside of the box body (1) through a first pipeline (31); an air outlet of the first fan (3) is communicated with the upper air duct (15) through a second pipeline (32), and a pipe orifice of the second pipeline (32) faces the left air duct (16); an air inlet of the second fan (4) is communicated with the right air duct (17) through a third pipeline (41); and an air outlet of the second fan (4) is communicated with the upper air duct (15) through a fourth pipeline (42).

4. A hot air oven as claimed in claim 1, characterized in that: the box body (1) comprises an outer shell (11) and an inner shell (12) which has a gap with the outer shell (11); and a heat insulation material (13) is filled between the outer shell (11) and the inner shell (12).

5. A hot air oven as claimed in claim 1, characterized in that: the contact part of the door of the box body (1) and the box body (1) is provided with a rubber pad.

6. A hot air oven as claimed in claim 1, characterized in that: an alarm device (14) is arranged on the outer side wall of the box body (1) and is positioned above the right side of the box body; and a temperature sensor (63) electrically connected with the alarm device (14) is arranged in the drying chamber (6).

7. A hot air oven as claimed in claim 1, characterized in that: a drying rack (7) is arranged on the inner bottom wall of the drying chamber (6); the bottom of the drying rack (7) is provided with a pulley (71); a groove (64) matched with the pulley (71) of the drying rack (7) is formed in the inner bottom wall of the drying chamber (6).

8. A hot air oven as claimed in claim 1, characterized in that: and a filter (33) is arranged at the air inlet of the first fan (3).