Natural convection drying box without fan

Abstract

The utility model discloses a natural convection drying box without a fan, which comprises a box body, a wind collecting cover, a heater and a storage rack, the storage rack is arranged in the box body, the wind collecting cover can be transversely arranged in the box body and is positioned above the storage rack, an exhaust pipe joint is arranged at the top of the box body, a flexible air pipe is arranged between the exhaust pipe joint and the wind collecting cover, and the flexible air pipe is connected with the heater. A first partition plate and a second partition plate located above the first partition plate are arranged at the bottom of the box body, an air inlet chamber is defined by the bottom face of the first partition plate and the inner wall, below the first partition plate, of the box body, a heating chamber is formed between the first partition plate and the second partition plate, and the heater is arranged in the heating chamber. Through reciprocating transverse movement of the air collecting cover, the path of air flow can be changed, S-shaped ascending air flow is formed, the air collecting cover can make contact with more materials, the uniformity of heating and drying of the materials is improved, and the drying time is shortened.

Description

Technical Field

[0001] This utility model relates to the field of natural convection drying ovens, and more particularly to a fanless natural convection drying oven. Background Technology

[0002] Natural convection drying ovens are commonly used equipment for drying materials. In a natural convection drying oven, air is heated to a set temperature and then exchanges heat with the material through natural convection, removing moisture from the material and thus drying it. This eliminates the need for a fan, avoiding the adverse effects of a fan's strong airflow on the material.

[0003] In existing natural convection drying ovens, the positions of the exhaust port and the air inlet are fixed. Natural air convection occurs between the air inlet and the exhaust port. The airflow path is unique and narrow, which is good for materials located in the airflow path. However, for other materials not in the airflow path, the drying speed is relatively slow, resulting in inconsistent drying effects. This requires extending the drying time, which increases energy consumption and reduces production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a fanless natural convection drying oven to improve the uniformity and efficiency of material drying.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A fanless natural convection drying oven includes: a box body, an air collecting hood, a heater, and a shelf. The shelf is disposed in the box body, and the air collecting hood is horizontally disposed in the box body and located above the shelf. An exhaust pipe connector is provided at the top of the box body, and a flexible air pipe is provided between the exhaust pipe connector and the air collecting hood. A first partition and a second partition located above the first partition are provided at the bottom of the box body. An air inlet chamber is formed between the bottom surface of the first partition and the inner wall of the box body below it. A heating chamber is formed between the first partition and the second partition. The heater is disposed in the heating chamber. First air holes are spaced apart on the first partition, and second air holes are spaced apart on the second partition.

[0007] The front of the box is provided with a door panel.

[0008] The housing is equipped with an electric lead screw slide that drives the air collecting hood to move laterally.

[0009] The cross-section of the air collecting hood has a C-shaped structure with the opening pointing downwards.

[0010] The box body has a sealing plate located on the bottom opening path of the air collection hood.

[0011] The housing has an air inlet on one side that communicates with the air intake chamber.

[0012] The enclosure is equipped with a temperature and humidity sensor.

[0013] The heater is an electric heating element.

[0014] The beneficial effects of this utility model are as follows: A fanless natural convection drying box, based on natural convection, can change the airflow path by reciprocating and moving the air collecting hood, forming an S-shaped upward airflow, which can come into contact with more materials, improve the uniformity of material heating and drying, help shorten the drying time, thereby reducing energy consumption, and without the need for a fan, improves production efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 yes Figure 1 A schematic diagram of the structure of the wind collection hood after it has been moved laterally. Detailed Implementation

[0017] The following is combined Figures 1 to 2 The technical solution of this utility model will be further illustrated through specific embodiments.

[0018] like Figure 1 The fanless natural convection drying oven shown includes: a chamber body 1, an air collection hood 2, a heater 10, and a shelf 16. The shelf 16 is disposed inside the chamber body 1. The front of the chamber body 1 is provided with a door panel 6. By opening the door panel 6, materials can be placed on the shelf 16. After closing the door panel 6, natural convection drying is carried out. A sealing ring is provided on the inner side of the door panel 6 to improve airtightness.

[0019] The air collecting hood 2 is slidably disposed within the housing 1 and positioned above the shelf 16. In this embodiment, the housing 1 is equipped with an electric lead screw slide 4 that drives the air collecting hood 2 to move laterally. The electric lead screw slide 4 can be controlled by a PLC controller. Figure 2 As shown, the automatic reciprocating horizontal movement of the air collection hood 2 is achieved.

[0020] like Figure 1 As shown, the cross-section of the air collecting hood 2 is a C-shaped structure with the opening pointing downwards, which is conducive to guiding and converging airflow. By reciprocating and moving the air collecting hood 2 laterally, the path of the airflow can be changed to form an S-shaped upward airflow, which can come into contact with more materials, improve the uniformity of material heating and drying, and help shorten the drying time, thereby reducing energy consumption and improving production efficiency.

[0021] Furthermore, when there is a small amount of material, the air collecting hood 2 can be moved directly above the material and then stationary to concentrate the airflow for heating and drying the material, thereby increasing the drying rate. A sealing plate 7 is installed on the side wall of the chamber 1, located along the opening path at the bottom of the air collecting hood 2. The initial position of the air collecting hood 2 is on the sealing plate 7. At this time, the sealing plate 7 closes the bottom opening of the air collecting hood 2, which facilitates the accumulation of hot airflow inside the chamber 1 for rapid heating. Once the air temperature reaches the specified temperature, the air collecting hood 2 is then moved laterally.

[0022] An exhaust pipe connector 5 is provided on the top of the housing 1. A flexible air pipe 3 is provided between the exhaust pipe connector 5 and the air collecting hood 2. The airflow of the air collecting hood 2 is sent to the exhaust pipe connector 5 through the flexible air pipe 3, and the airflow is discharged to the outside without affecting the reciprocating lateral movement of the air collecting hood 2.

[0023] A first partition and a second partition 15 located above the first partition 9 are provided at the bottom of the box 1. The bottom surface of the first partition 9 and the inner wall of the box 1 below it form an air intake chamber 13. In this embodiment, an air inlet 8 communicating with the air intake chamber 13 is provided on one side of the box 1. External airflow enters the air intake chamber 13 through the air inlet 8.

[0024] like Figure 1 As shown, a heating chamber 12 is formed between the first partition 9 and the second partition 15. A heater 10 is installed in the heating chamber 12. In this embodiment, the heater 10 is an electric heating element, which can be controlled by a PLC controller to heat the air in the heating chamber 12. A temperature and humidity sensor 17 is installed on the housing 1 to detect the temperature and humidity inside the housing 1 and send the signals to the PLC controller via a signal line. This facilitates automated control of the heater 10 and prevents overheating.

[0025] First air holes 14 are provided at intervals on the first partition 9, and second air holes 11 are provided at intervals on the second partition 15. Air in the air inlet chamber 13 enters the heating chamber 12 through the first air holes 14, is heated by the heater 10, and then enters the space above through the second air holes 11 to heat and dry the materials placed on the shelf 16.

[0026] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A fanless natural convection drying oven, characterized in that, include: The enclosure comprises a housing, an air collector, a heater, and a shelf. The shelf is disposed within the housing. The air collector is horizontally movable within the housing and positioned above the shelf. An exhaust pipe connector is located at the top of the housing. A flexible air pipe is connected between the exhaust pipe connector and the air collector. A first partition and a second partition located above the first partition are provided at the bottom of the housing. An air inlet chamber is formed between the bottom surface of the first partition and the inner wall of the housing below it. A heating chamber is formed between the first partition and the second partition. The heater is disposed within the heating chamber. First air holes are spaced apart on the first partition, and second air holes are spaced apart on the second partition.

2. The fanless natural convection drying oven according to claim 1, characterized in that, The front of the box is equipped with a door panel.

3. The fanless natural convection drying oven according to claim 1, characterized in that, The housing is equipped with an electric lead screw slide that drives the air collecting hood to move horizontally.

4. The fanless natural convection drying oven according to claim 1, characterized in that, The cross-section of the air collecting hood is a C-shaped structure with the opening pointing downwards.

5. The fanless natural convection drying oven according to claim 4, characterized in that, A sealing plate is installed on the side wall of the box, located on the opening path at the bottom of the air collection hood.

6. The fanless natural convection drying oven according to claim 1, characterized in that, An air inlet communicating with the air intake chamber is provided on one side of the housing.

7. The fanless natural convection drying oven according to claim 1, characterized in that, The enclosure is equipped with temperature and humidity sensors.

8. The fanless natural convection drying oven according to claim 1, characterized in that, The heater uses an electric heating element.

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