Vacuum drying oven adopting forced hot air circulation for heating

Abstract

The utility model discloses a vacuum drying oven adopting forced hot air circulation for heating. The vacuum drying oven comprises an oven body, an inner container, an electric cabinet, a temperature control instrument, a control circuit, a motor, centrifugal fan blades and a heating pipe. The inner container with the hollow cavity shaped like the Chinese character'ri 'and composed of the top face layer, the bottom face layer, the two side face layers and the shelf layer is arranged in the box body, the air channel baffle, the centrifugal fan blades and the heating pipe are arranged in the top face layer of the inner container, and the centrifugal fan blades are driven by the motor to promote heat energy generated by the heating pipe to form forced hot air circulation in the inner container. Therefore, the temperature of the to-be-dried object area in the box body is uniform, and the optimal drying effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of drying equipment, in particular to a heating method of implementing hot air circulation in a drying box, in particular to a vacuum drying box which adopts forced hot air circulation for heating. Background Art

[0002] Currently, there are two types of electric heating methods for vacuum drying ovens. The first is that the heating tube is fixed on the inner wall of the drying oven to heat the inner wall, and the heat on the inner wall is transferred to the object to be dried in the box; the second is that the heating tube is fixed on the shelf inside the box, and the heat on the inner shelf is transferred to the object to be dried in the box; the problem is that the first heating method has the defects of slow heat transfer speed and uneven heating; the second heating method has the problem that the local temperature of the shelf bonding surface is high, while the local temperature away from the shelf bonding surface is low, resulting in a relatively large temperature difference. The above two methods both have the defects of uneven heating of the object to be dried and low thermal efficiency. Utility Model Content

[0003] The purpose of the utility model is to address the deficiencies of the existing technology and provide a vacuum drying oven that adopts forced hot air circulation for heating. The utility model adopts an inner liner with a "sun"-shaped hollow cavity composed of a top surface layer, a bottom surface layer, two side surfaces and a shelf layer, which is arranged in the box body. An air duct baffle, a centrifugal fan blade and a heating tube are arranged in the top surface layer of the inner liner. The centrifugal fan blade is driven by a motor to cause the heat energy generated by the heating tube to form a forced hot air circulation in the inner liner, so as to achieve rapid and forced circulation of heat energy in the box body, so that the heating temperature of the articles to be dried in the area is uniform, the thermal efficiency is improved and the best drying effect is obtained.

[0004] In order to ensure the rapid and forced circulation of heat energy in the box, the utility model is equipped with an air duct baffle and centrifugal fan blades in the top surface layer of the inner tank. The centrifugal fan blades are driven by a motor to cause the heat energy generated by the heating tube to form a hot air circulation route in the inner tank, forcing the heat energy to circulate rapidly and orderly in the inner tank of the "sun" shaped hollow cavity, effectively improving the temperature uniformity in the box.

[0005] The specific technical solution for achieving the purpose of this utility model is:

[0006] A vacuum drying oven that uses forced hot air circulation for heating, which features include a box body, an inner tank, an electric control box, a temperature control instrument, a control circuit, a base, a motor, a centrifugal fan blade and a heating tube;

[0007] The box body is a rectangular body with a box door on the front, and a motor seat and a first shaft hole on the top; the base is provided at the bottom of the box body;

[0008] The inner container is composed of a top layer, a bottom layer, two side layers and a shelf layer to form a hollow cavity in the shape of a Chinese character "Ri", the top layer of the inner container is provided with a second shaft hole, and the top layer of the inner container is provided with an air duct baffle;

[0009] The air duct baffle is folded from a plate into a stepped plate with a baffle lower side, a baffle plane and a baffle upper side, the baffle plane is provided with a ventilation opening, the air duct baffle is arranged in the top layer of the inner container, and the baffle lower side and the baffle upper side of the air duct baffle are welded with the lower surface and the upper surface in the top layer of the inner container respectively;

[0010] The position of the ventilation opening on the air duct baffle is coaxially arranged with the position of the second shaft hole on the top layer of the inner container;

[0011] The electric control box is arranged on the top of the box body;

[0012] The temperature control instrument and the control circuit are arranged in the electric control box and are electrically connected;

[0013] The motor is arranged on the motor seat of the box body and is electrically connected with the control circuit of the electric control box, the output shaft of the motor penetrates into the top layer of the inner container through the first shaft hole of the box body and the second shaft hole of the inner container;

[0014] The centrifugal fan blade is arranged in the top layer of the inner container and is connected with the output shaft of the motor;

[0015] The heating pipe is arranged in the top layer of the inner container and is electrically connected with the control circuit of the electric control box;

[0016] The inner container is arranged in the box body, and the top layer, the bottom layer and the two side layers of the inner container are attached to the inner wall of the box body 1.

[0017] The handle, the observation window and the sealing rubber strip are arranged on the box door, and the box door is hingedly connected with the box body.

[0018] The shelf layer of the inner container is arranged in the middle of the inner container and is parallel to the top layer and penetrates through the two side layers.

[0019] The heat preservation layer is arranged on each surface of the rectangular body of the box body and on the box door.

[0020] The utility model discloses a hollow cavity in the shape of a Chinese character "Ri" is arranged in the box body, an air duct baffle, a centrifugal fan blade and a heating pipe are arranged in the top layer of the inner container, the centrifugal fan blade is driven by the motor to make the heat energy generated by the heating pipe form a forced hot air circulation in the inner container, the heat energy in the box body is rapidly and forcedly circulated, the heating temperature of the drying objects in the region is uniform, the heat efficiency is improved and the best drying effect is obtained.

[0021] In order to ensure the rapid and forced circulation of heat energy in the box, the utility model is equipped with an air duct baffle and centrifugal fan blades in the top surface layer of the inner tank. The centrifugal fan blades are driven by a motor to cause the heat energy generated by the heating tube to form a hot air circulation route in the inner tank, forcing the heat energy to circulate rapidly and orderly in the inner tank of the "sun" shaped hollow cavity, effectively improving the temperature uniformity in the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the utility model;

[0023] Figure 2 for Figure 1 A side view schematic diagram of

[0024] Figure 3 for Figure 1 A local enlarged schematic diagram of point A. DETAILED DESCRIPTION

[0025] See Figure 1 、 Figure 2 The utility model is completed by modifying the vacuum drying box of the prior art. When working, the box body 1 and the inner tank 2 are both in a vacuum state.

[0026] See Figure 1 、 Figure 2 The utility model includes a box body 1, an inner tank 2, an electric control box 3, a temperature control instrument 4, a control circuit 5, a motor 7, a centrifugal fan blade 8 and a heating tube 9.

[0027] See Figure 1 、 Figure 2 、 Figure 3 The box body 1 is a rectangular body with a box door 11 on the front, a motor seat and a first shaft hole 14 on the top, and a base 6 on the bottom.

[0028] See Figure 1 、 Figure 2 、 Figure 3 The inner liner 2 is composed of a top surface layer 23, a bottom surface layer 24, two side surface layers 25 and a shelf layer 26 to form a "sun" shaped hollow cavity. A second axial hole 21 is provided on the top surface layer 23 of the inner liner 2, and an air duct baffle 22 is provided in the top surface layer 23 of the inner liner 2;

[0029] The air duct baffle 22 is folded by a plate into a lower side of the partition, a partition plane and a stepped plate on the upper side of the partition. A vent 221 is provided on the partition plane. The air duct baffle 22 is arranged in the top surface layer 23 of the inner liner 2, and the lower side of the partition and the upper side of the partition of the air duct baffle 22 are respectively welded to the lower side and the upper side of the top surface layer 23 of the inner liner 2.

[0030] The position of the ventilation opening 221 on the air duct baffle 22 is coaxially arranged with the position of the second axial hole 21 on the top surface layer 23 of the inner container 2 .

[0031] See Figure 1 、 Figure 2 、 Figure 3 The electric control box 3 is arranged at the top of the box body 1; the temperature control instrument 4 and the control circuit 5 are arranged in the electric control box 3, and the temperature control instrument 4 is electrically connected to the control circuit 5; the motor 7 is arranged on the motor seat of the box body 1 and is electrically connected to the control circuit 5 of the electric control box 3, and the output shaft of the motor 7 passes through the first axial hole 14 of the box body 1 and the second axial hole 21 of the inner tank 2 into the top surface layer 23 of the inner tank 2; the centrifugal fan blade 8 is arranged in the top surface layer 23 of the inner tank 2 and is connected to the output shaft of the motor 7; the heating tube 9 is arranged in the top surface layer 23 of the inner tank 2 and is electrically connected to the control circuit 5 of the electric control box 3; the inner tank 2 is arranged in the box body 1, and the top surface layer 23, the bottom surface layer 24 and the two side surface layers 25 of the inner tank 2 are in contact with the inner wall of the box body 1.

[0032] See Figure 1 The door 11 is provided with a handle 12 , an observation window 15 and a door sealing strip 16 , and the door 11 is hinged to the box body 1 via a hinge 13 .

[0033] See Figure 1 、 Figure 2 、 Figure 3 The shelf layer 26 of the inner liner 2 is arranged in the middle of the inner liner 2 and is parallel to the top layer 23 and penetrates the two side layers 25.

[0034] See Figure 1 A heat-insulating layer 10 is provided on each surface of the rectangular body of the box 1 and on the door 11.

[0035] Installation of this utility model:

[0036] See Figure 1 、 Figure 2 First, complete the assembly of the observation window 15, the handle 12, and the door sealing strip 16 to the door 11, and then complete the assembly of the door 11 to the box body 1 through the hinge 1 and the assembly of the base 6 to the box body 1.

[0037] See Figure 1 、 Figure 2 、 Figure 3 , the inner liner 2 is placed in the box body 1, and the top surface layer 23, the bottom surface layer 24 and the two side surface layers 25 of the inner liner 2 are in contact with the inner wall of the box body 1; the second axial hole 21 of the inner liner 2 is aligned with the first axial hole 14 of the box body 1;

[0038] To facilitate installation, a mounting cover is provided at the location where the air duct baffle 22 is installed on the top surface layer 23 of the inner tank 2, and the mounting cover is opened;

[0039] The motor 7 is mounted on the motor seat of the box body 1, and the output shaft of the motor 7 passes through the first shaft hole 14 of the box body 1 and the second shaft hole 21 of the inner container 2 and enters the top surface layer 23 of the inner container 2;

[0040] The centrifugal fan blade 8 is arranged in the top surface layer 23 of the inner container 2 and is connected to the output shaft of the motor 7. Since the position of the vent 221 on the air duct baffle 22 is coaxial with the position of the second axial hole 21 on the top surface layer 23 of the inner container 2, the centrifugal fan blade 8 is located just above the vent 221 of the air duct baffle 22.

[0041] Install the heating tube 9 in the top layer 23 of the inner container 2;

[0042] Close the installation cover.

[0043] See Figure 1 、 Figure 2 , place the temperature control instrument 4 and the control circuit 5 in the electric control box 3, and place the electric control box 3 on the top of the box body 1; electrically connect the temperature control instrument 4 to the control circuit 5; electrically connect the heating tube 9 to the control circuit 5 of the electric control box 3, and electrically connect the motor 7 to the control circuit 5 of the electric control box 3.

[0044] The utility model works like this:

[0045] See Figure 1 、 Figure 2 , place the items to be dried on the shelf layer 26 and the bottom layer 24 of the inner container 2; and close the door 11.

[0046] See Figure 1 、 Figure 2 、 Figure 3 The hot air in the top layer 23 can only flow from the lower right side of the duct baffle 22 through the vent 221 toward the upper left side of the duct baffle 22, forcing the hot air in the liner 2 to flow from the left side layer 25 of the liner 2 through the shelf layer 26 and the bottom layer 24, and then flow to the right side layer 25 and return to the lower right side of the duct baffle 22 of the top layer 23 to form a circulation.

[0047] See Figure 1 、 Figure 2 、 Figure 3In the present invention, an air duct baffle 22 and a centrifugal fan blade 8 are provided in the top surface layer 23 of the inner liner 2. The centrifugal fan blade 8 is driven by the motor 7 to cause the heat energy generated by the heating tube 9 to form a hot air circulation route in the inner liner, forcing the heat energy to circulate quickly and orderly in the inner liner of the "sun" shaped hollow cavity, effectively improving the temperature uniformity in the box, making the heating temperature of the items to be dried in the area uniform, improving the thermal efficiency and obtaining the best drying effect.

Claims

1. A vacuum drying oven using forced hot air circulation for heating, characterized in that: It includes a box body (1), an inner container (2), an electric control box (3), a temperature control instrument (4), a control circuit (5), feet (6), a motor (7), a centrifugal fan blade (8) and a heating pipe (9); The box body (1) is a rectangular body with a box door (11) provided on the front, and a motor base and a first shaft hole (14) are provided on its top; The feet (6) are provided at the bottom of the box body (1); The inner container (2) is composed of a top layer (23), a bottom layer (24), two side layers (25) and a shelf layer (26) to form a hollow cavity in the shape of "day". A second shaft hole (21) is provided on the top layer (23) of the inner container (2), and an air duct baffle (22) is provided inside the top layer (23) of the inner container (2); The air duct baffle (22) is a stepped plate formed by folding a plate into a lower side of the partition, a partition plane and an upper side of the partition. A ventilation port (221) is provided on the partition plane. The air duct baffle (22) is provided inside the top layer (23) of the inner container (2), and the lower side and the upper side of the partition of the air duct baffle (22) are respectively welded to the lower and upper surfaces inside the top layer (23) of the inner container (2); The position of the ventilation port (221) on the air duct baffle (22) is coaxially set with the position of the second shaft hole ( ​ ​ ​ ​ ​ ​ 2. A vacuum drying oven using forced hot air circulation for heating according to claim 1, characterized in that: ​ 3. The vacuum drying oven using forced hot air circulation for heating according to claim 1, characterized in that: ​ 4. The vacuum drying oven using forced hot air circulation for heating according to claim 1, characterized in that: ​

Images