Air duct structure of hot air circulation type constant temperature drying oven

Abstract

The utility model provides a hot -blast circulation formula constant temperature drying oven air duct structure, including drying oven, drying oven inside has drying room, sets up drying frame in drying room, drying room outside is empty cavity, heating chamber, heating chamber is fixedly connected heater in, and heater passes through first air pipe and second air pipe and transports hot -blast to drying room, return air chamber, and circulating fan draws the air in drying room to enter into return air chamber, and return air chamber is connected with condenser pipeline through return air pipe, and condenser passes through circulating pipe and transports the circulating wind after processing to enter into heating chamber, drying room still is provided with air supply component. The utility model, through two symmetrical air supply pipes, sets up the symmetrical air supply port on each layer drying frame, carries out drying to the sample on each layer drying frame synchronously, evenly covers each layer sample, effectively shortens the whole drying length, and ensures drying evenness and thoroughness, reduces the influence to the experiment accuracy.

Description

Technical Field

[0001] This utility model relates to the field of constant temperature drying oven technology, specifically to a hot air circulation constant temperature drying oven duct structure. Background Technology

[0002] A constant-temperature drying oven is a commonly used piece of equipment in laboratories and industries. It primarily uses electric heating or other methods to maintain the internal temperature within a set range for drying items. It features a temperature control system for precise temperature regulation and typically includes an observation window for easy monitoring of the internal conditions. The oven body has excellent insulation properties to minimize heat loss. Widely used in scientific research, medical and health, chemical, and electronics fields, it is suitable for various scenarios such as drying, baking, and heat treatment. It can meet the drying needs of glassware, chemical reagents, experimental samples, and other items, providing a stable, constant-temperature drying environment for related work.

[0003] However, most constant temperature drying ovens currently use a single-sided airflow structure. This design means that hot air can only enter the drying space from one side, making it difficult for the samples to achieve a uniform heat distribution. Especially for drying ovens with multi-layer drying racks, samples closer to the airflow duct receive more heat, while samples farther away receive less heat, resulting in significant differences in the degree of drying within the same layer. At the same time, the uneven airflow distribution between the upper and lower drying racks also leads to different drying rates. Hot air accumulates in the upper layer, causing excessively rapid drying, while hot air cannot reach the lower layer sufficiently, resulting in slow drying. This not only prolongs the overall drying time but also easily causes some samples to be over-dried or under-dried, thus affecting the accuracy of experimental or production results. Utility Model Content

[0004] The purpose of this invention is to provide a hot air circulation constant temperature drying oven duct structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A hot air circulating constant temperature drying oven duct structure includes:

[0007] The drying oven has a drying chamber inside, a drying rack is installed inside the drying chamber, and the drying chamber is an empty cavity outside. The front of the drying chamber is rotatably connected to an openable door, and a person window is provided on the door. The drying oven is also equipped with a control panel for controlling various settings of the drying oven.

[0008] A heating chamber is located inside a cavity. The chamber body is composed of heat insulation panels to prevent heat exchange between the heating chamber and the cavity. A heater is fixedly connected inside the heating chamber, and the heater delivers hot air to the drying chamber through a first air duct and a second air duct.

[0009] The return air chamber is located at the top of the drying chamber. The circulating fan draws air from the drying chamber into the return air chamber. The return air chamber is connected to the condenser pipe through a return air duct. The condenser delivers the treated circulating air into the heating chamber through a circulating pipe.

[0010] The drying chamber is also equipped with an air supply component for drying the samples.

[0011] Preferably, the air supply assembly includes a connecting box, which is fixedly connected to the bottom of the drying chamber, and the connecting box is connected to the first air duct through the bottom of the drying chamber via a second air duct.

[0012] Preferably, the connecting box is hollow inside, and an air supply pipe is fixedly connected to the upper end face of the connecting box. The air supply pipe passes through the drying rack and reaches above the top first drying rack. An air supply port is opened on the air supply pipe.

[0013] Preferably, the heater is provided with an intake fan on its side for introducing fresh air from outside, and the position of the intake fan corresponds to the position of the ventilation opening on the side of the drying chamber.

[0014] Preferably, a dustproof net is fixedly connected to the ventilation opening.

[0015] Preferably, the condenser is connected to a drain pipe, which passes through the drying chamber to discharge the condensate outside the drying chamber.

[0016] Preferably, the heater is connected to the first air duct via a connecting flange on the heat insulation plate of the heating chamber.

[0017] Preferably, the return air chamber is composed of heat insulation blocks to isolate the heat exchange between the return air chamber and the cavity.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This invention uses two symmetrical air supply pipes with symmetrical air outlets on each drying rack to simultaneously dry the samples on each rack, uniformly covering each sample layer, effectively shortening the overall drying time, ensuring drying uniformity and thoroughness, and reducing the impact on experimental accuracy.

[0020] This invention accelerates the heating rate of the drying oven during startup and increases the flow rate of hot air through a circulating air duct, effectively improving drying efficiency. Furthermore, it recovers and reheats the dried hot air, reducing heat loss and making it more energy-efficient. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0022] Figure 2This is a three-dimensional schematic diagram of the drying oven door of this utility model when it is open;

[0023] Figure 3 This is a three-dimensional schematic diagram of the circulating air duct assembly of this utility model;

[0024] Figure 4 This is a three-dimensional schematic diagram of the internal structure of this utility model;

[0025] Figure 5 This is a three-dimensional schematic diagram of the connection between the air supply duct and the first air duct of this utility model;

[0026] Figure 6 This is an internal front view of the present invention.

[0027] In the diagram: 1. Drying oven; 101. Drying chamber; 102. Circulating fan; 103. Insulation plate; 104. Heating chamber; 105. Return air chamber; 106. Insulation block; 107. Cavity; 2. Door; 3. Manhole; 4. Control panel; 5. Ventilation opening; 501. Dustproof net; 6. Drying rack; 7. Connecting box; 701. Air supply duct; 702. Air outlet; 8. Heater; 801. Inlet fan; 802. Connecting flange; 803. First air duct; 804. Second air duct; 9. Condenser; 901. Return air duct; 902. Circulation pipe; 903. Drain pipe. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example:

[0030] Please see Figures 1 to 3 This utility model provides a technical solution:

[0031] A hot air circulating constant temperature drying oven duct structure includes:

[0032] The drying oven 1 has a drying chamber 101 inside, a drying rack 6 is installed inside the drying chamber 101, and a cavity 107 is outside the drying chamber 101. The front of the drying chamber 101 is rotatably connected to an openable door 2, and a manhole 3 is provided on the door 2. The drying oven 1 is also equipped with a control panel 4 for controlling various settings of the drying oven 1.

[0033] Heating chamber 104 is disposed in cavity 107. The chamber body of heating chamber 104 is composed of heat insulation plate 103 to isolate the heat exchange between heating chamber 104 and cavity 107. Heater 8 is fixedly connected in heating chamber 104. Heater 8 delivers hot air to drying chamber 101 through first air duct 803 and second air duct 804.

[0034] Return air chamber 105 is located at the top of drying chamber 101. The circulating fan 102 draws air from drying chamber 101 into return air chamber 105. Return air chamber 105 is connected to condenser 9 via return air pipe 901. Condenser 9 delivers processed circulating air into heating chamber 104 via circulating pipe 902.

[0035] The drying chamber 101 is also equipped with an air supply assembly for drying the sample by air supply.

[0036] Specifically, the air supply assembly includes a connecting box 7, which is fixedly connected to the bottom of the drying chamber 101. The connecting box 7 is connected to the first air duct 803 through the bottom of the drying chamber 101 via a second air duct 804.

[0037] Specifically, the interior of the connecting box 7 is hollow, and an air supply pipe 701 is fixedly connected to the upper end face of the connecting box 7. The air supply pipe 701 passes through the drying rack 6 and reaches above the top first layer of the drying rack 6. An air supply port 702 is provided on the air supply pipe 701.

[0038] Specifically, the heater 8 is provided with an intake fan 801 on its side for introducing fresh air from outside. The position of the intake fan 801 corresponds to the position of the ventilation opening 5 on the side of the drying chamber 1.

[0039] In this embodiment, the heater 8 draws in fresh air from the outside through the vent 5 on the side of the drying chamber 1 via the inlet fan 801. The fresh air is then sent into the drying chamber 101 through the first air duct 803 and the second air duct 804. At the same time, the circulating fan 102 in the drying chamber 101 is activated, drawing the cold air in the drying chamber 101 into the return air chamber 105. The cold air enters the condenser 9 from the outlet of the return air chamber 105, i.e., the return air duct 901, and undergoes dehumidification treatment. The condensate is discharged outside the chamber through the drain pipe 903. The treated cold air then enters the heating chamber 104 through the circulation pipe 902 and is sent to the heater 8 for heating. By simultaneously sending out hot air and drawing out cold air, the temperature inside the drying chamber 1 can be rapidly raised to the temperature set on the control panel 4.

[0040] In this embodiment, the heater 8 is connected to the first air duct 803 via a connecting flange 802, allowing hot air from the heater 8 to enter the first air duct 803. Both ends of the first air duct 803 are connected to second air ducts 804 via pipes. The second air ducts 804 pass through the bottom of the drying chamber 101 and connect to the connecting box 7 inside the drying chamber 101. Hot air passes through the first air duct 803, enters the second air ducts 804 on both sides, and then enters the connecting boxes 7 on both sides. The hot air is blown onto the samples on each layer of the drying rack 6 through the air supply pipe 701 connected to the top of the connecting box 7 and the air outlet 702 inside the air supply pipe 701. Air is simultaneously supplied to the samples on each layer for drying, ensuring uniform coverage of each layer of samples, effectively shortening the overall drying time, ensuring drying uniformity and thoroughness, and reducing the impact on experimental accuracy.

[0041] The dried hot air, along with the moisture on the sample surface, is drawn up by the circulating fan 102 at the top of the drying chamber 101 and gradually enters the return air chamber 105. It then enters the condenser 9 through the return air duct 901. The condenser 9 condenses and dehumidifies the hot air and moisture. The treated circulating air returns to the heating chamber 104 through the circulating duct 902 for reheating, forming a circulating air duct. This circulating air duct effectively improves the drying efficiency and recovers and reheats the dried hot air, reducing heat loss and saving energy.

[0042] Specifically, the number of connecting flange 802, first air duct 803, second air duct 804 and air supply assembly can be increased as a set to accelerate drying efficiency.

[0043] Specifically, the air supply ducts 701 on both sides are symmetrically arranged (e.g. Figure 5 Simultaneously dry the sample on drying rack 6.

[0044] Specifically, the condenser 9 and heater 8 are preferably commercially available condensers 9 and electric heaters 8, which can complete the heating and condensation work.

[0045] Specifically, a dustproof net 501 is fixedly connected to the ventilation opening 5.

[0046] Specifically, the condenser 9 is connected to a drain pipe 903, which passes through the drying chamber 1 to discharge the condensate outside the drying chamber 1.

[0047] Specifically, the heater 8 is connected to the first air duct 803 via the connecting flange 802 on the heat insulation plate 103 of the heating chamber 104.

[0048] Specifically, the return air chamber 105 is composed of heat insulation blocks 106, which isolate the heat exchange between the return air chamber 105 and the cavity 107.

[0049] In use, the inlet fan 801 introduces fresh air from the side vent 5 of the drying chamber 1. After being filtered by the dust filter 501, the fresh air enters the heating chamber 104. The heater 8 heats the air, and the hot air is sent into the drying chamber 101 through the first air duct 803 and the second air duct 804, the connecting box 7, the air supply pipe 701 and the air supply port 702, to dry the samples on the drying rack 6. The hot and humid air in the drying chamber 101 is drawn into the return air chamber 105 at the top by the circulating fan 102, and then enters the condenser 9 through the return air pipe 901. The condenser 9 condenses and dehumidifies the air, and the condensate is discharged out of the chamber through the drain pipe 903. The treated circulating air returns to the heating chamber 104 through the circulation pipe 902 for reheating.

[0050] All other parts of this utility model not described herein are the same as existing technologies, or are known technologies, or can be implemented using existing technologies, and will not be described in detail here.

[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hot air circulating constant temperature drying oven duct structure, characterized in that, include: A drying oven (1) has a drying chamber (101) inside, a drying rack (6) is installed inside the drying chamber (101), and a cavity (107) is outside the drying chamber (101). The front of the drying chamber (101) is rotatably connected to an openable door (2), and a manhole (3) is provided on the door (2). The drying oven (1) is also equipped with a control panel (4) for controlling various settings of the drying oven (1). A heating chamber (104) is located inside a cavity (107). The chamber body of the heating chamber (104) is composed of a heat insulation plate (103) that separates the heating chamber (104) from the cavity (107). A heater (8) is fixedly connected inside the heating chamber (104). The heater (8) delivers hot air to the drying chamber (101) through a first air duct (803) and a second air duct (804). Return air chamber (105) is located at the top of drying chamber (101). A circulating fan (102) located at the top of drying chamber (101) draws air from drying chamber (101) into return air chamber (105). Return air chamber (105) is connected to condenser (9) via return air pipe (901). Condenser (9) delivers processed circulating air into heating chamber (104) via circulating pipe (902). The drying chamber (101) is also equipped with an air supply assembly for drying the sample by air supply.

2. The air duct structure of a hot air circulating constant temperature drying oven according to claim 1, characterized in that: The air supply assembly includes a connecting box (7), which is fixedly connected to the bottom of the drying chamber (101). The connecting box (7) is connected to the first air duct (803) through the bottom of the drying chamber (101) via a second air duct (804).

3. The air duct structure of a hot air circulating constant temperature drying oven according to claim 2, characterized in that: The interior of the connecting box (7) is hollow, and an air supply pipe (701) is fixedly connected to the upper end of the connecting box (7). The air supply pipe (701) passes through the drying rack (6) and reaches the top of the first drying rack (6). An air supply port (702) is opened on the air supply pipe (701).

4. The air duct structure of a hot air circulating constant temperature drying oven according to claim 1, characterized in that: The heater (8) is provided with an intake fan (801) on its side for introducing fresh air from outside. The position of the intake fan (801) corresponds to the position of the ventilation opening (5) on the side of the drying box (1).

5. The air duct structure of a hot air circulating constant temperature drying oven according to claim 4, characterized in that: A dustproof net (501) is fixedly connected to the ventilation opening (5).

6. The air duct structure of a hot air circulating constant temperature drying oven according to claim 1, characterized in that: The condenser (9) is connected to a drain pipe (903), which passes through the drying box (1) to discharge the condensate outside the drying box (1).

7. The air duct structure of a hot air circulating constant temperature drying oven according to claim 1, characterized in that: The heater (8) is connected to the first air duct (803) via a connecting flange (802) on the heat insulation plate (103) of the heating chamber (104).

8. The air duct structure of a hot air circulating constant temperature drying oven according to claim 1, characterized in that: The return air chamber (105) is composed of heat insulation blocks (106) that separate the return air chamber (105) from the cavity (107).

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