Electric heating internal circulation air blast drying box

Abstract

The utility model relates to the technical field of drying equipment, in particular to an electric heating internal circulation air blast drying box which comprises an upper box body and a lower box body, an air outlet barrel is vertically installed in the center of the inner bottom face of the upper box body, a containing cavity used for filling a purification part is formed in the inner side wall of the upper box body, and a kidney-shaped hole is formed in the side wall of the containing cavity. The heating mechanism is connected with the air outlet barrel so as to heat airflow generated by the air blower and then send the airflow into the air outlet barrel, hot airflow flows into the upper box body through air outlet holes densely formed in the surface of the air outlet barrel to dry objects to be dried, and the air blower is connected with a ventilation opening formed in the lower box body through an air inlet pipe so as to absorb external air. The containing cavity is connected with the air inlet pipe through an air return pipe. Hot air flow internal circulation is formed in the drying box, the hot air flow circulation efficiency and the heat utilization rate in the drying box are improved, energy consumption is reduced, and hot air flow is diffused from the center to the periphery through the air outlet barrel so that objects to be dried can be heated evenly.

Description

Technical Field

[0001] The utility model relates to the technical field of drying equipment, in particular to an electric heating internal circulation blast drying box. Background Art

[0002] A drying oven is a device that dries the product to be dried by heating and blowing air. Air can be exchanged inside and outside the drying oven. Through the continuous exchange of air inside and outside the box, moisture is also taken out of the box, thereby achieving the purpose of drying. In the prior art, the product to be dried is generally blown on one side, which is easy to cause uneven heating of the product to be dried in the box, resulting in reduced uniformity of heating and drying of the product to be dried by the drying oven; the exchange of air inside and outside requires continuous heating of the external air entering the drying oven before the object to be dried can be dried, which will result in higher energy consumption, poor heat utilization, and poor drying effect. In addition, the humidity of the external air is different due to environmental reasons, which affects the drying time and drying efficiency of the object to be dried. Utility Model Content

[0003] The utility model aims to solve the above defects and provides an electric heating internal circulation blast drying box.

[0004] In order to overcome the defects existing in the background technology, the technical solution adopted by the utility model to solve its technical problems is: an electric heating internal circulation blast drying box, comprising an upper box body and a lower box body arranged below the upper box body, an air outlet is vertically installed on the center of the bottom surface of the upper box body, and a accommodating cavity for filling the purification part is opened on the inner wall, and a waist hole which is connected with the upper box body and directly facing the air outlet is opened on the side wall of the accommodating cavity, a heating mechanism and a blower connected to the heating mechanism are arranged in the lower box body, the heating mechanism is connected to the air outlet so as to heat the airflow generated by the blower and send it into the air outlet, the hot air flow flows into the upper box body through the air outlet holes densely opened on the surface of the air outlet to dry the object to be dried, the blower is connected to the vent provided on the lower box body through the air inlet pipe to absorb external air, and the accommodating cavity is connected to the air inlet pipe through the return air pipe.

[0005] A further improvement includes that a plurality of accommodating cavities are provided in the circumferential direction of the upper box body, and the accommodating cavities are distributed around the air outlet tube.

[0006] A further improvement includes that the purification unit is composed of a non-woven fiber membrane, an activated carbon layer, a honeycomb sponge photocatalyst filter, and a HEPA filter layer.

[0007] A further improvement includes providing a side door on the outer wall of the upper box body for opening and closing the accommodating chamber.

[0008] A further improvement includes a detachable upper end of the upper box body for opening an upper cover of the upper box body.

[0009] A further improvement includes placing a sample placement mechanism in the upper box, the sample placement mechanism including a plurality of trays in an annular structure and connecting pipes connecting the trays in series.

[0010] A further improvement includes providing a pipe bracket in the lower box body for supporting and fixing the air inlet pipe.

[0011] A further improvement includes that the heating mechanism includes a heating box and an electric heating tube arranged in the heating box, and the heating box is connected to the air outlet pipe and the blower respectively.

[0012] The beneficial effects of the utility model are as follows: the design improves the hot air flow circulation efficiency and heat utilization rate inside the drying box and reduces energy consumption by allowing the hot air flow in the upper box and the lower box to form an internal circulation, and an air outlet is arranged in the center of the bottom surface of the upper box so that the hot air flow diffuses from the center to the surroundings, so that the objects to be dried are heated evenly, and the purification part can remove moisture and dust; the multiple accommodating cavities can greatly increase the air flow velocity and accelerate the drying speed; the side door can replace the purification part in time; the upper cover can load and unload the objects to be dried. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is the front view of the utility model;

[0015] Figure 2 yes Figure 1 Middle DD section view;

[0016] Figure 3 It is a cross-sectional view of the heating mechanism in the utility model;

[0017] In the figure, 1-lower box body, 2-side door, 3-upper cover, 4-upper box body, 5-ventilation port, 6-air inlet pipe, 7-connecting pipe, 8-tray, 9-purification part, 10-waist hole, 11-air outlet tube, 12-air outlet hole, 13-heating mechanism, 14-blower, 15-return air duct, 16-pipe bracket, 17-accommodating chamber, 18-heating box, 19-electric heating tube. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The embodiments in the basic utility model and all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] according to Figure 1 and Figure 2 As shown, an electric heating internal circulation blast drying oven comprises an upper box body 4 and a lower box body 1 arranged below the upper box body 4. An air outlet 11 is vertically installed on the center of the inner bottom surface of the upper box body 4, and a receiving cavity 17 for filling the purification part 9 is provided on the inner side wall. A waist hole 10 communicating with the upper box body 4 and facing the air outlet 11 is provided on the side wall of the receiving cavity 17. A heating mechanism 13 and a blower 14 connected to the heating mechanism 13 are arranged in the lower box body 1. The heating mechanism 13 is connected to the air outlet 11 so as to heat the airflow generated by the blower 14 and send it into the air outlet 11. The hot airflow flows into the upper box body 4 through the air outlet holes 12 densely provided on the surface of the air outlet 11 to dry the object to be dried. The blower 14 is connected to the vent 5 provided on the lower box body 1 through the air inlet pipe 6 to absorb external air. The accommodating chamber 17 is connected to the air inlet pipe 6 through the return air pipe 15. The return air pipe 15 can make the hot air flow in the upper box body 4 flow back into the blower 14 to realize internal circulation. In this way, the hot air flow circulation efficiency inside the drying box is improved, and the heat utilization rate is improved. The purification part 9 can filter the moisture and dust in the drying box, and replacing the purification part 9 can ensure the drying effect in the drying box. The hot air flow is blown from the center to the surroundings through the air outlet 12 on the central air outlet 11 on the inner bottom surface of the upper box body 4 to dry the object to be dried, so that the object to be dried is heated evenly.

[0020] A plurality of accommodating chambers 17 are provided in the circumferential direction of the upper box body 4, and the accommodating chambers 17 are distributed around the air outlet tube 11. This design greatly improves the air flow velocity and accelerates the drying speed.

[0021] The purification part 9 is composed of a non-woven fiber membrane, an activated carbon layer, a honeycomb sponge photocatalyst filter, and a HEPA filter layer. This design can absorb the moisture evaporated from the surface of the dry object in the hot air flow, thereby improving the quality of the dry material.

[0022] A side door 2 for opening and closing the accommodating chamber 17 is arranged on the outer wall of the upper box body 4. The purification part 9 can be replaced in time through the side door 2 to ensure the drying effect in the drying box.

[0023] The upper end of the upper box body 4 is detachably provided with an upper cover 3 for opening the upper box body 4. The upper cover 3 can be opened to load or unload the objects to be dried.

[0024] A sample placement mechanism is placed in the upper box body 4, and the sample placement mechanism includes a plurality of trays 8 of annular structure and connecting pipes 7 that connect the trays 8 in series. This design enables the air outlet 11 to be located at the center of the tray 8, and the hot air flow ejected from the air outlet 12 evenly dries the objects to be dried placed on the tray 8, which is beneficial to improving the uniformity of heating and drying.

[0025] A pipe bracket 16 for supporting and fixing the air inlet pipe 6 is provided in the lower box body 1 . The pipe bracket 16 ensures the stability of the air inlet pipe 6 and ensures the stable flow of the airflow in the air inlet pipe 6 .

[0026] according to Figure 3 As shown, the heating mechanism 13 includes a heating box 18 and an electric heating tube 19 arranged in the heating box 18. The heating box 18 is connected to the air outlet 11 and the blower 14 respectively, and the electric heating tube 19 can heat the air flowing through.

[0027] Working principle: open the upper cover 3 and place the sample placement mechanism in the upper box body 4, place the objects to be dried on the tray 8, start the blower 14 to generate airflow and send it into the heating mechanism 13, the electric heating tube 19 heats the passing airflow to form a hot airflow, the hot airflow enters the air outlet tube 11 and is ejected from the air outlet 12, the hot airflow is ejected from the center to the surroundings in the upper box body 4, and the objects to be dried on the tray 8 are dried, the hot airflow enters the accommodating cavity 17 through the waist hole 10, the hot airflow passes through the purification part 9 for dehumidification and dust removal, and the filtered hot airflow re-enters the blower 14 through the return air pipe 15 and the air inlet pipe 6 to form an internal circulation, in this process, a part of the external air is absorbed, and the objects to be dried are quickly dried through the above steps.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electric heating internal circulation blast drying oven, characterized in that: The invention comprises an upper box body (4) and a lower box body (1) arranged below the upper box body (4); an air outlet cylinder (11) is vertically mounted on the center of the inner bottom surface of the upper box body (4); a receiving chamber (17) for filling a purification unit (9) is provided on the inner side wall; a waist hole (10) is provided on the side wall of the receiving chamber (17) which is connected to the upper box body (4) and faces the air outlet cylinder (11); a heating mechanism (13) and a blower (14) connected to the heating mechanism (13) are arranged in the lower box body (1); the heating mechanism (13) and the blower (14) connected to the heating mechanism (13) are arranged in the lower box body (1); The mechanism (13) is connected to the air outlet cylinder (11) so as to heat the airflow generated by the blower (14) and then send it into the air outlet cylinder (11). The hot airflow flows into the upper box body (4) through the air outlet holes (12) densely provided on the surface of the air outlet cylinder (11) to dry the object to be dried. The blower (14) is connected to the vent (5) provided on the lower box body (1) through the air inlet pipe (6) so as to absorb external air. The accommodating chamber (17) is connected to the air inlet pipe (6) through the return air pipe (15).

2. The electric heating internal circulation blast drying oven according to claim 1, characterized in that: A plurality of accommodating chambers (17) are provided in the circumferential direction of the upper box body (4), and the accommodating chambers (17) are distributed with the air outlet cylinder (11) as the center.

3. The electric heating internal circulation blast drying oven according to claim 1, characterized in that: The purification part (9) is composed of a non-woven fiber membrane, an activated carbon layer, a honeycomb sponge photocatalyst filter, and a HEPA filter layer.

4. The electric heating internal circulation blast drying oven according to claim 3, characterized in that: A side door (2) for opening and closing the accommodating cavity (17) is provided on the outer wall of the upper box body (4).

5. The electric heating internal circulation blast drying oven according to claim 1, characterized in that: The upper end of the upper box body (4) is detachably provided for opening the upper cover (3) of the upper box body (4).

6. The electric heating internal circulation blast drying oven according to claim 1, characterized in that: A sample placement mechanism is placed in the upper box (4), and the sample placement mechanism comprises a plurality of trays (8) in an annular structure and connecting pipes (7) that connect the trays (8) in series.

7. The electric heating internal circulation blast drying oven according to claim 1, characterized in that: The lower box body (1) is provided with a pipe bracket (16) for supporting and fixing the air inlet pipe (6).

8. The electric heating internal circulation blast drying oven according to claim 1, characterized in that: The heating mechanism (13) comprises a heating box (18) and an electric heating pipe (19) arranged in the heating box (18); the heating box (18) is respectively connected to the air outlet cylinder (11) and the blower (14).

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