Electrothermal blowing drying box

Abstract

The utility model discloses an electrothermal blowing drying box which comprises a box body with an openable and closable box door, an inner box arranged in the box body, an electrothermal tube used for supplying heat and a circulating fan used for air circulation, an air channel is formed between the two sides and the bottom of the inner box and the inner wall of the outer box, the electric heating pipe is installed on the lower portion in the air channel, the circulating fan is installed in the air channel, and an air outlet of the circulating fan faces the electric heating pipe. A plurality of ventilation holes are formed in the two sides of the inner box; an air inlet of the circulating fan is connected with an air return pipe, a plurality of air inducing covers which are vertically arranged side by side are arranged on the air return side of the inner box, one ends of the air inducing covers are fixedly connected with the wall face of the inner box, and the other ends of the air inducing covers are communicated with the air return pipe through branch pipes. The drying box has the advantages that backflow air can be effectively and uniformly circulated, so that the uniformity of the flow velocity of the air in the inner box is effectively ensured, and materials are more uniformly dehydrated and dried.

Description

Technical Field

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

[0002] As a widely used experimental equipment, electric heating blast drying oven is widely used in many fields such as chemical industry, medicine, food, electronics, etc. It is mainly used for sample drying, heat treatment, constant temperature test, etc. Its working principle is mainly to generate heat through electric heating elements, and distribute the heat evenly throughout the working room with the help of built-in fans, so as to achieve fast and uniform drying of the samples placed in it.

[0003] However, in the existing electric blast drying oven design, air distribution uniformity is a key technical challenge. Uneven air duct design or fan position setting may cause heat concentration in some areas of the oven, while insufficient heat in other areas, thus affecting the efficiency and consistency of sample drying, and may even damage the sample due to overheating. In addition, due to uneven air flow, the temperature field distribution in the oven may also be uneven, affecting the precise control of the drying process, which is especially important for high-precision experiments that require strict control of temperature conditions.

[0004] Therefore, how to achieve highly uniform heat distribution and airflow distribution inside the studio has become an important direction for the technical research and development of electric blast drying ovens. In response to this problem, this application proposes a new technical solution for uniform air distribution in electric blast drying ovens, aiming to effectively improve the working performance of the drying oven and the sample processing effect. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an electric heating blast drying box.

[0006] In order to solve the above technical problems, the technical solution of the utility model is:

[0007] An electric hot air drying box comprises a box body with an openable and closable box door, an inner box arranged in the box body, an electric heating pipe for heating, and a circulating fan for air circulation; an air passage is formed between the two sides and the bottom of the inner box and the inner wall of the outer box, the electric heating pipe is installed at the lower part of the air passage, and the circulating fan is installed in the air passage with the air outlet facing the electric heating pipe; a plurality of ventilation holes are arranged on both sides of the inner box; the air inlet of the circulating fan is connected to a return air duct, and a plurality of vertically parallel air induced hoods are arranged on one side of the return air of the inner box, one end of the plurality of air induced hoods is fixedly connected to the wall of the inner box, and the other end is connected to the return air duct through branch pipes.

[0008] Preferably, a heat insulation board is provided between the electric heating tube and the bottom of the inner box.

[0009] Preferably, a baffle is provided at the air inlet side of the inner box of the air passage, and the baffle is arranged obliquely so that the air passage forms a structure with a larger lower end and a smaller upper end.

[0010] Preferably, the end of the hood connected to the inner box is rectangular.

[0011] The above technical solution has the following advantages:

[0012] The utility model adopts a plurality of induced draft hoods in combination with branch pipes, which can effectively circulate the return air evenly, thereby effectively ensuring the uniformity of the air flow rate in the inner box, so that the dehydration and drying of the material is more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model;

[0014] Figure 2 for Figure 1 A cross-sectional view of

[0015] Figure 3 for Figure 1 A magnified three-dimensional image of the central air hood;

[0016] Figure 4 It is a cross-sectional view of a second embodiment of the utility model;

[0017] In the figure: 1-box door, 2-box body, 3-inner box, 4-electric heating pipe, 5-circulation fan, 6-air channel, 7-return air duct, 8-draft hood, 9-branch pipe, 10-heat insulation board, 11-baffle. DETAILED DESCRIPTION

[0018] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0019] Example 1

[0020] As attached Figure 1-3As shown, an electric hot air drying box comprises a box body 2 with an openable and closable box door 1, an inner box 3 arranged in the box body 2, an electric heating pipe 4 for heating, and a circulating fan 5 for air circulation; air passages 6 are formed between the two sides and the bottom of the inner box 3 and the inner wall of the outer box, the electric heating pipe 4 is installed at the lower part of the air passage 6, and the circulating fan 5 is installed in the air passage 6 with the air outlet facing the electric heating pipe 4; a plurality of ventilation holes are arranged on both sides of the inner box 3 (not shown in the figure); the air inlet of the circulating fan 5 is connected to a return air duct 7, and three vertically parallel air induced hoods 8 are arranged on one side of the return air of the inner box 3, one end of the three air induced hoods 8 is fixedly connected to the wall of the inner box 3, and the other end is connected to the return air duct 7 through branch pipes 9.

[0021] As a further improved technical solution of this embodiment, a heat insulation board 10 is arranged between the electric heating tube 4 and the bottom of the inner box 3.

[0022] As a preferred technical solution of this embodiment, one end of the induced draft hood 8 connected to the inner box 3 is rectangular to further ensure the uniformity of air circulation.

[0023] Example 2

[0024] As attached Figure 4 As shown, an electric heating blast drying box, wherein the air passage 6 is provided with a baffle 11 at the air inlet side of the inner box 3, and the baffle 11 is provided obliquely, so that the air passage 6 forms a structure with a large lower end and a small upper end. The rest is basically the same as that of embodiment 1, and by providing the baffle 11, the uniformity of the wind pressure on the air inlet side of the inner box 3 can be further improved, and the uniformity of the air circulation in the inner box 3 can be further ensured.

[0025] The utility model adopts a plurality of induced draft hoods, which can effectively circulate the return air evenly, thereby effectively ensuring the uniformity of the air flow rate in the inner box, so that the dehydration and drying of the material is more uniform.

[0026] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. An electric heating blast drying oven, comprising a box body (2) having an openable and closable box door (1), an inner box (3) arranged in the box body (2), an electric heating pipe (4) for heating, and a circulating fan (5) for air circulation; air passages (6) are formed between the two sides and the bottom of the inner box (3) and the inner wall of the outer box, the electric heating pipe (4) is installed at the lower part of the air passage (6), and the circulating fan (5) is installed in the air passage (6) with the air outlet facing the electric heating pipe (4); a plurality of ventilation holes are arranged on both sides of the inner box (3); the characteristics are as follows: The air inlet of the circulation fan (5) is connected to a return air duct (7), and a plurality of vertically parallel air induced hoods (8) are arranged on the return air side of the inner box (3). One end of the plurality of air induced hoods (8) is fixedly connected to the wall surface of the inner box (3), and the other end is connected to the return air duct (7) through branch pipes (9).

2. The electric heating blast drying oven according to claim 1, characterized in that: A heat insulation board (10) is provided between the electric heating tube (4) and the bottom of the inner box (3).

3. The electric heating blast drying oven according to claim 1 or 2, characterized in that: The air passage (6) is provided with a baffle (11) at the air inlet side of the inner box (3), and the baffle (11) is arranged at an angle so that the air passage (6) forms a structure with a larger lower end and a smaller upper end.

4. The electric heating blast drying oven according to claim 1 or 2, characterized in that: One end of the air induced hood (8) connected to the inner box (3) is rectangular.

5. The electric heating blast drying oven according to claim 3, characterized in that: One end of the air induced hood (8) connected to the inner box (3) is rectangular.

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