Efficient hot air circulation drying machine

Abstract

The utility model relates to a drying device, in particular to an efficient hot air circulation dryer which comprises a drying box, the drying box comprises a box body, a plurality of drying discs are arranged in the box body, drying pipelines are arranged among the drying discs, a circulation system is arranged on the outer side of the box body, and the drying pipelines are connected with the circulation system. By arranging the air inlet pipe and the flow dividing pipe, hot air is evenly dispersed below each layer of drying disc, the drying degree and the temperature of the hot air making contact with each drying disc are guaranteed to be consistent, the air collecting cover is arranged above each drying disc, negative pressure is generated at the air collecting cover through suction force of the air outlet draught fan, humid and hot air is exhausted, water vapor accumulation is avoided, and the drying efficiency is improved. The drying effect is improved, the drying time is shortened, the heat exchange box is arranged, the fresh air is heated through wet and hot air, the temperature difference between the fresh air and the wet and hot air is utilized, water vapor in the hot air is condensed, the air inlet temperature of a fresh air fan is increased, the temperature rising time is shortened, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a drying device, in particular to a high-efficiency hot air circulation drying machine. Background Art

[0002] A dryer is a machine that uses the heat generated by an electric heating element to heat the air, and then uses a fan to drive the hot air to flow through the material, heating the material while taking away the moisture in the material, thereby drying the material. The hot air circulation dryer is based on the traditional dryer, using pipelines to circulate hot air, reduce heat loss, and control the temperature by controlling the fresh air volume and exhaust air volume.

[0003] Existing hot air circulation dryers generally adopt the form of bottom air intake and top air outlet. The materials are stacked horizontally in the drying box. The dry hot air enters the drying box from the bottom, passes through several layers of materials in sequence, and is discharged from the top and returns to the circulating fan. During the upward movement of the hot air, the humidity gradually accumulates and the heat gradually loses, making the drying degree of the upper and lower layers of materials uneven. Generally, the drying effect is ensured by extending the drying time, which affects the production efficiency. Utility Model Content

[0004] The main purpose of the utility model is to provide a high-efficiency hot air circulation dryer to solve the problems of low drying efficiency and uneven drying degree of upper and lower layers of materials in the traditional hot air circulation dryer proposed in the related art.

[0005] In order to achieve the above object, according to one aspect of the utility model, a high-efficiency hot air circulation dryer is provided, comprising:

[0006] A drying box, the drying box comprising a box body, a plurality of drying plates are arranged inside the box body, drying pipes are arranged between the drying plates, a circulation system is arranged outside the box body, and the drying pipes are connected to the circulation system;

[0007] The drying pipeline includes an air inlet pipeline and a return air pipeline. The air inlet pipeline is located below each drying tray and is used to transport dry hot air to the drying tray. The return air pipeline is located above each drying tray and is used to discharge the moist hot air.

[0008] The circulation system includes a heat exchange and dehumidification component and a heating component. The heat exchange and dehumidification component is connected to the return air pipeline, used for heat exchange between return air and fresh air and using the temperature difference to condense water vapor in the return air. The heat exchange and dehumidification component and the heating component are connected through a fresh air fan. The fresh air fan is used to transport the air at the heat exchange and dehumidification component to the heating component. The heating component is used to heat the air and then transport it to the air inlet pipeline.

[0009] Furthermore, a sealing door is provided on the front side of the box body, and the sealing door is used for sealing the box body.

[0010] Furthermore, a support column is provided at the center of the front opening of the box body, a cross bar is provided between the support column and the inner wall of the box body, and the drying plate is slidably installed above the cross bar.

[0011] Furthermore, the air inlet pipeline includes an air inlet pipe, and a plurality of diversion pipes are evenly arranged on the air inlet pipe. The diversion pipes are vertically upward, and the tail end of the air inlet pipe passes through the box body and is connected to the heating component.

[0012] Furthermore, the return air duct includes an air collecting hood, which opens downward. The top of the air collecting hood is connected to an air outlet pipe through a pipeline. The top of the air outlet pipe penetrates the box upward and is provided with an air outlet fan. The air outlet fan is connected to the heat exchange and dehumidification component through a pipeline.

[0013] Furthermore, the heat exchange and dehumidification component includes a heat exchange box, the top of which is connected to an air outlet fan via a pipeline, a drain port and an exhaust pipe are provided at the bottom of the heat exchange box, and the exhaust pipe is connected to a fresh air fan.

[0014] Furthermore, a condensation plate and a fresh air duct are provided in the heat exchange box. The fresh air duct enters the heat exchange box from the lower left, penetrates the condensation plate in an S shape, and then passes through the upper right side of the heat exchange box and is connected to the fresh air fan.

[0015] Furthermore, the heating component includes a heating device, which is connected to an air outlet of a fresh air fan through a pipeline. The air outlet of the heating device is provided with an air supply pipe, and the air supply pipe is connected to an air inlet pipe.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model evenly disperses the hot air under each drying plate by arranging an air inlet pipe and a diverter pipe, so as to ensure that the drying degree and temperature of the hot air contacted by each drying plate are the same; an air collecting hood is arranged above each drying plate, and the suction force of the air outlet fan is utilized to generate negative pressure at the air collecting hood, so as to discharge the humid hot air, avoid the accumulation of water vapor, improve the drying effect and reduce the drying time; a heat exchange box is arranged, and the humid hot air is utilized to heat the fresh air, and the temperature difference between the fresh air and the humid hot air is utilized to condense the water vapor in the hot air, so as to increase the air inlet temperature of the fresh air fan, reduce the heating time and improve the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the drying box structure of the utility model;

[0020] Figure 3This is a schematic diagram of the drying pipeline structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the circulation system structure of the utility model;

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the heat exchange box of the utility model.

[0023] Illustration Description:

[0024] 1. Drying box; 11. Box body; 12. Support column; 13. Sealed door; 14. Cross bar; 15. Drying tray;

[0025] 2. Drying pipeline; 21. Air inlet pipe; 22. Diverter pipe; 23. Air collecting hood; 24. Air outlet pipe; 25. Air outlet fan;

[0026] 3. Circulation system; 31. Heat exchange box; 32. Condensation plate; 33. Fresh air duct; 34. Drain outlet; 35. Exhaust duct; 36. Fresh air fan; 37. Heating device; 38. Air supply duct. DETAILED DESCRIPTION

[0027] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0028] See also Figures 1 to 5 , this embodiment provides a high-efficiency hot air circulation dryer, comprising:

[0029] The drying box 1 comprises a box body 11, a plurality of drying trays 15 are arranged in the box body 11, drying pipes 2 are arranged between the drying trays 15, a circulation system 3 is arranged outside the box body 11, and the drying pipes 2 and the circulation system 3 are connected.

[0030] The bottom of the drying plate 15 is a metal mesh, and hot air can pass through the drying plate 15. The edge of the drying plate 15 is made of angle steel welded to play a supporting role.

[0031] A sealing door 13 is provided at the front side of the box body 11 , and the sealing door 13 is used to seal the box body 11 .

[0032] The sealed door 13 adopts a double-door design, and the sealed door 13 and the box body 11 are connected by a hinge, and the sealed door 13 can rotate around the hinge.

[0033] A support column 12 is provided at the center of the front opening of the box body 11 , a cross bar 14 is provided between the support column 12 and the inner wall of the box body 11 , and a drying plate 15 is slidably installed above the cross bar 14 .

[0034] The upper and lower ends of the support column 12 are welded to the box body 11 , the cross bar 14 is fixedly connected to the support column 12 and the box body 11 by bolts, and the bottom edge of the drying plate 15 contacts the top surface of the cross bar 14 .

[0035] The drying pipeline 2 includes an air inlet pipeline and a return air pipeline. The air inlet pipeline is located below each drying tray 15 and is used to transport dry hot air to the drying tray 15. The return air pipeline is located above each drying tray 15 and is used to discharge moist hot air. The air inlet pipeline includes an air inlet pipe 21. A plurality of shunt pipes 22 are evenly arranged on the air inlet pipe 21. The shunt pipes 22 are vertically upward. The tail end of the air inlet pipe 21 passes through the box 11 and is connected to the heating component.

[0036] The diameter of the air inlet pipe 21 is larger than that of the shunt pipe 22 , and the shunt pipe 22 is threadedly connected to the air inlet pipe 21 . Hot air enters the shunt pipe 22 from the air inlet pipe 21 , and then enters the housing 11 from the shunt pipe 22 . The hot air flows upward through the drying plate 15 to dry the material in the drying plate 15 .

[0037] The return air duct includes an air collecting hood 23, which opens downward. The top of the air collecting hood 23 is connected to an air outlet pipe 24 through a pipeline. The top of the air outlet pipe 24 passes through the box body 11 upward and is provided with an air outlet fan 25. The air outlet fan 25 is connected to the heat exchange and dehumidification component through a pipeline.

[0038] The air collecting hood 23 is connected to the same air outlet pipe 24 through a pipe at the top, and the diameter of the air outlet pipe 24 is larger than the diameter of the top opening of the air collecting hood 23 .

[0039] The air outlet fan 25 is fixedly mounted on the top surface of the box body 11 by means of bolts. When the air outlet fan 25 is working, it can draw out the air in the air outlet pipe 24, thereby generating negative pressure at the air collecting hood 23, and sucking in the air below the air collecting hood 23. At this time, the hot air passes through the drying plate 15, carries the water vapor in the material into the air collecting hood 23, and is then drawn out by the air outlet fan 25.

[0040] The circulation system 3 includes a heat exchange and dehumidification component and a heating component. The heat exchange and dehumidification component is connected to the return air pipeline, and is used for heat exchange between return air and fresh air and condensing water vapor in the return air by using the temperature difference. The heat exchange and dehumidification component and the heating component are connected through a fresh air fan 36. The heating component is used to heat the air and then transport it to the air inlet pipeline.

[0041] The fresh air fan 36 is used to transport the air at the heat exchange and dehumidification component to the heating component.

[0042] The heat exchange and dehumidification assembly includes a heat exchange box 31, the top of which is connected to the air outlet fan 25 through a pipeline, and the bottom of the heat exchange box 31 is provided with a drain port 34 and an exhaust pipe 35, and the exhaust pipe 35 is threadedly connected to the air inlet of the fresh air fan 36.

[0043] The hot and humid air enters the heat exchange box 31 driven by the air outlet fan 25 , is then discharged from the exhaust pipe 35 , and then enters the fresh air fan 36 through the exhaust pipe 35 .

[0044] A condensation plate 32 and a fresh air duct 33 are provided in the heat exchange box 31. The fresh air duct 33 enters the heat exchange box 31 from the lower left, penetrates the condensation plate 32 in an S shape, then passes through the upper right side of the heat exchange box 31 and is threadedly connected to the air inlet of the fresh air fan 36.

[0045] The negative pressure generated by the fresh air blower 36 when working will suck the normal temperature air from the left end of the fresh air pipe 33. After the humid hot air enters the heat exchange box 31, it will pass through the gap between the condensation plates 32. Since the air temperature in the fresh air pipe 33 is relatively low, the temperature of the condensation plates 32 is relatively low. The humid hot air exchanges heat with the condensation plates 32, the temperature is reduced, the internal water vapor condenses, the humid hot air becomes dry, and the air temperature in the fresh air pipe 33 increases.

[0046] The condensed water and part of the air are discharged from the drain port 34. The dried hot air and the heated fresh air are mixed at the air inlet of the fresh air blower 36, further increasing the fresh air temperature.

[0047] The heating assembly includes a heating device 37 , which is connected to the air outlet of the fresh air fan 36 through a pipeline. The air outlet of the heating device 37 is threadedly connected with an air supply pipe 38 , and the air supply pipe 38 is connected to the air inlet pipe 21 .

[0048] The heating device 37 uses a known electric heating element. The mixed fresh air enters the heating device 37 driven by the fresh air blower 36, rises to a set latitude after passing through the heating device 37, and then is discharged from the air outlet of the heating device 37, enters the air supply pipe 38, and is distributed to the air inlet pipe 21 through the air supply pipe 38.

[0049] When using the device, the drying plate 15 is first taken out, and after the drying plate 15 is evenly filled with materials, it is placed on the cross bar 14 and the sealing door 13 is closed.

[0050] Start the fresh air fan 36 and the heating device 37. After the fresh air fan 36 is started, the ambient temperature air is sucked in from the fresh air duct 33 and then transported to the heating device 37. After the heating device 37 heats the ambient temperature air to the temperature required for drying, it is transported to the air inlet duct 21 through the air supply duct 38 and then discharged through the diversion duct 22.

[0051] The hot air discharged from the shunt pipe 22 moves upward, passes through the material, heats the material and takes away the water in the material. The air temperature and dryness of each drying plate 15 are the same, so the drying time can be shortened.

[0052] At this time, the outlet fan 25 is started. After the outlet fan 25 is started, negative pressure is generated at the outlet pipe 24, and the negative pressure is transmitted to each air collecting hood 23 through the pipeline. At this time, the hot air passing through the material becomes humid, and due to the negative pressure at the air collecting hood 23, it enters the air collecting hood 23, passes through the outlet pipe 24, enters the outlet fan 25, and is transported to the heat exchange box 31 by the outlet fan 25. The humid hot air will not accumulate from bottom to top in the box body 11, thereby improving the drying efficiency.

[0053] After the humid hot air enters the heat exchange box 31, it will pass through the gaps between the condensation plates 32. Since the air temperature in the fresh air duct 33 is relatively low, the temperature of the condensation plates 32 is relatively low. The humid hot air exchanges heat with the condensation plates 32, the temperature drops, the internal water vapor condenses, the humid hot air becomes dry, and the air temperature in the fresh air duct 33 rises.

[0054] The condensed water and part of the air are discharged from the drain port 34. The dried hot air and the heated fresh air are mixed at the air inlet of the fresh air blower 36, further increasing the fresh air temperature, reducing the heating time and improving production efficiency.

[0055] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. High efficiency hot air circulation dryer, characterized by: include: A drying box (1), the drying box (1) comprising a box body (11), a plurality of drying trays (15) being arranged inside the box body (11), drying pipes (2) being arranged between the drying trays (15), a circulation system (3) being arranged outside the box body (11), and the drying pipes (2) and the circulation system (3) being connected; The drying pipeline (2) comprises an air inlet pipeline and an air return pipeline, wherein the air inlet pipeline is located below each drying tray (15) and is used to convey dry hot air toward the drying tray (15), and the air return pipeline is located above each drying tray (15) and is used to discharge moist hot air; The circulation system (3) comprises a heat exchange and dehumidification component and a heating component. The heat exchange and dehumidification component is connected to the return air pipeline and is used for heat exchange between the return air and the fresh air and condensing the water vapor in the return air by using the temperature difference. The heat exchange and dehumidification component and the heating component are connected via a fresh air fan (36). The fresh air fan (36) is used to transport the air at the heat exchange and dehumidification component to the heating component. The heating component is used to heat the air and then transport it to the air inlet pipeline.

2. The high-efficiency hot air circulation dryer according to claim 1, characterized in that: A sealing door (13) is provided on the front side of the box body (11), and the sealing door (13) is used to seal the box body (11).

3. The high-efficiency hot air circulation dryer according to claim 2, characterized in that: A support column (12) is provided at the center of the front opening of the box body (11), a cross bar (14) is provided between the support column (12) and the inner wall of the box body (11), and the drying plate (15) is slidably mounted above the cross bar (14).

4. The high-efficiency hot air circulation dryer according to claim 3, characterized in that: The air inlet pipeline comprises an air inlet pipe (21), on which a plurality of flow dividers (22) are evenly arranged, the flow dividers (22) extending vertically upwards, and the rear end of the air inlet pipe (21) passes through the box body (11) and is connected to the heating component.

5. The high-efficiency hot air circulation dryer according to claim 4, characterized in that: The return air duct comprises an air collecting hood (23), the opening of the air collecting hood (23) is downward, the top of the air collecting hood (23) is connected to an air outlet pipe (24) via a pipeline, the top of the air outlet pipe (24) passes through the box (11) upward and is provided with an air outlet fan (25), and the air outlet fan (25) is connected to the heat exchange and dehumidification component via a pipeline.

6. The high-efficiency hot air circulation dryer according to claim 5, characterized in that: The heat exchange and dehumidification assembly comprises a heat exchange box (31), the top of the heat exchange box (31) is connected to an air outlet fan (25) via a pipeline, the bottom of the heat exchange box (31) is provided with a drain port (34) and an exhaust pipe (35), and the exhaust pipe (35) is connected to a fresh air fan (36).

7. The high-efficiency hot air circulation dryer according to claim 6, characterized in that: The heat exchange box (31) is provided with a condensation plate (32) and a fresh air duct (33). The fresh air duct (33) enters the heat exchange box (31) from the lower left, passes through the condensation plate (32) in an S shape, and then passes out from the upper right of the heat exchange box (31) and is connected to the fresh air fan (36).

8. The high-efficiency hot air circulation dryer according to claim 5, characterized in that: The heating component comprises a heating device (37), the heating device (37) being connected to an air outlet of a fresh air blower (36) via a pipeline, the air outlet of the heating device (37) being provided with an air supply pipe (38), and the air supply pipe (38) being connected to an air inlet pipe (21).

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