CN204027278U - A kind of double-deck circulating vacuum baking box - Google Patents

Abstract

The utility model provides a kind of double-deck circulating vacuum baking box, the inner bag of baking box makes even heat be distributed in inner bag by the bilayer circulation of Inner eycle ducting system and outer circulating air duct system, make the gas temperature rate of climb in inner bag fast, shorten the heat time, reduce energy consumption, uniform heat distribution, makes product drying effect better.

Description

A double-layer circulation vacuum oven

technical field

The utility model relates to a double-layer circulating vacuum oven.

Background technique

The traditional vacuum oven does not have internal wind treatment, which can easily lead to excessive local temperature, resulting in poor baking effect of the product.

Chinese utility model patent ZL201220453674.3 discloses a vacuum oven thermal cycle device, which includes a power system and a fan connected to the power system. The fan is placed in the air duct inside the vacuum oven. A sealed space is formed, and a heating wire is arranged outside the inner tank. The air outside the inner tank is heated by the heating wire, and the air is driven by the fan to flow in the air duct to achieve the purpose of circulating heating. This kind of thermal cycle is simply to use the fan to push the gas flow, and the air flow direction is single, resulting in uneven temperature distribution, which makes the overall heating of the oven slow, takes a long time to heat up, and results in high energy consumption for baking.

Utility model content

The purpose of the utility model is to overcome the defects of the prior art and provide a double-layer circulating vacuum oven, which has the characteristics of fast heating speed, short heating time, low energy consumption, uniform heat distribution and good product drying effect.

The utility model is achieved in that a double-layer circulating vacuum oven comprises:

A closed outer box and an inner tank arranged in the outer box, the inner tank is provided with an external circulation air duct system and an internal circulation air duct system;

The internal circulation air duct system includes an inner layer board, a ventilation screen, a windshield, a wind wheel and a motor. The windshield is arranged at the rear of the inner cavity, the ventilation mesh plate is spaced from both sides of the inner cavity to form a side air channel, the ventilation mesh plate is spaced from the bottom of the inner cavity to form a lower air channel, and the windshield is spaced from the rear of the inner cavity to form a side air channel. The rear air ducts are formed at intervals, and the rear air ducts are respectively connected with the side air ducts and the lower air ducts. In the rear air duct, the wind wheel communicates with the inner cavity through the wind wheel hole provided on the windshield, the motor is arranged outside the inner tank, and the wind wheel is driven and connected to the motor through magnetic fluid.

Further, the outer circulation air duct system includes an outer layer plate, an air supply pipe, an air connection pipe and a fan, the outer layer plate and the inner layer plate are separated to form a sandwich, and the outer layer plate is provided with an air supply hole , the air supply pipe is arranged on the outer side of the outer layer, the interlayer communicates with the air supply pipe through the air supply hole, the air supply pipe communicates with the fan arranged outside the inner tank, and the fan communicates with the connecting port. The air pipe is connected, and the air connecting pipe is connected with the interlayer.

Further, the rear air passage is provided with an air induction shell, the air induction shell is wound around the outside of the wind wheel, the air induction shell includes a spiral shell and an opening, and the opening of the air induction shell faces upward.

Further, air grooves are provided on both sides and the bottom of the windshield, and the rear air passage communicates with the side air passage and the lower air passage respectively through the air grooves.

Further, the air supply hole is arranged on the top of the outer layer plate, the diameter of the air supply hole gradually expands from one end close to the fan to an end farther away from the fan, and the air supply pipe is attached to the outer layer plate top.

Further, a plurality of ribs are arranged in the interlayer, and the ribs are connected end to end to form a square ring, which is fixedly arranged on the outer surface of the inner layer plate, and fixedly arranged on the inner surface of the outer layer plate.

Further, the two sides and the bottom of the interlayer are provided with heating wires, the ribs are provided with slots, and the heating wires are fixed between the slots and the outer surface of the inner plate.

Further, the external circulation air duct system also includes an air outlet, and the air connecting pipe communicates with the air outlet.

Further, the number of inner tanks is two.

The beneficial effect of the double-layer circulating vacuum oven of the utility model is that the heat is evenly distributed in the inner container through the double-layer circulation of the inner circulation air duct system and the outer circulation air duct system, so that the temperature of the gas in the inner container can rise faster. Fast, shortening the heating time, reducing energy consumption, uniform heat distribution, and better drying effect of products.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

Fig. 1 is the perspective view of a kind of double-layer circulation vacuum oven of the utility model embodiment;

Fig. 2 is a three-dimensional exploded view of an inner container of a double-layer circulating vacuum oven according to an embodiment of the present invention;

Fig. 3 is a three-dimensional view of the inner tank of a double-layer circulating vacuum oven according to the embodiment of the present invention;

Fig. 4 is a perspective view of an inner circulation windshield of a double-layer circulation vacuum oven according to an embodiment of the present invention;

Fig. 5 is a schematic view of the internal circulation cavity of a double-layer circulation vacuum oven according to the embodiment of the present invention;

Fig. 6 is a top view schematic diagram of the inner circulation of a double-layer circulation vacuum oven according to the embodiment of the present invention;

Fig. 7 is a schematic front view of the outer circulation of a double-layer circulation vacuum oven according to the embodiment of the present invention;

Fig. 8 is a schematic top view of the outer circulation of a double-layer circulation vacuum oven according to the embodiment of the present invention.

Reference signs: outer box 1;

Inner tank 2; inner layer plate 21; outer layer plate 22; air supply hole 221; inner cavity 23; Groove 281; wind wheel hole 282; rear air channel 29;

motor 3; wind wheel 31;

fan 4; air duct 41; air outlet 42;

Air supply pipe 5;

Air induction shell 6; Spiral shell 61; Opening 62;

Heating wire 7;

Ribs 8.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figure 1, an embodiment of a double-layer circulating vacuum oven of the present invention includes:

A closed outer box 1 and an inner tank 2 arranged in the outer box 1, the inner tank 2 is provided with an outer circulation air duct system and an inner circulation air duct system.

As shown in Fig. 2, Fig. 5 and Fig. 6, the internal circulating air duct system includes an inner plate 21, a ventilation screen 25, a windshield 28, a wind wheel 31 and a motor 3, and the inner plate 21 constitutes an inner cavity 23, the ventilation screens 25 are respectively arranged on both sides and the bottom of the inner cavity 23, the windshield 28 is arranged at the rear of the inner cavity 23, and the ventilation screens 25 are separated from the two sides of the inner cavity 23 to form side wind Road 26, the ventilation screen 25 is spaced from the bottom of the inner cavity 23 to form a lower air channel 27, the windshield 28 is spaced from the rear of the inner cavity 23 to form a rear airway 29, and the windshield 28 is provided with an air groove 281 , the rear air passage 29 communicates with the side air passage 26 and the lower air passage 27 respectively through the air groove 281, and the side air passage 26 and the lower air passage 27 communicate with the inner cavity 23 through the mesh holes 251 arranged on the ventilation mesh plate 25 The wind wheel 31 is arranged in the rear air channel 29, the wind wheel 31 communicates with the inner chamber 23 through the wind wheel hole 282 arranged on the windshield 28, the motor 3 is arranged outside the inner tank 2, and the The wind wheel 31 is drivingly connected with the motor 3 through magnetic fluid. The rear air duct 29 is provided with an air induction shell 6, which is wound around the outside of the wind wheel 31, and the air induction shell 6 includes a spiral housing 61 and an opening 62, and the opening of the air induction shell 6 62 face up.

As shown in Fig. 2, Fig. 3, Fig. 7 and Fig. 8, the outer circulation air duct system includes an outer layer plate 22, an air supply pipe 5, an air connection pipe 41, a fan 4 and an air outlet 42, and the outer layer The board 22 and the inner board 21 are separated to form an interlayer 24. The top of the outer board 22 is provided with an air supply hole 221. The diameter of the air supply hole 221 gradually expands from one end of the fan 4 from near to far. The air duct 5 is attached to the top of the outer plate 22, the interlayer 24 communicates with the air duct 5 through the air supply hole 221, the air duct 5 communicates with the fan 4, and the fan 4 communicates with the air receiving unit. The pipe 41 is in communication with the interlayer 24 , and the air connection pipe 41 is in communication with the air outlet 42 .

As shown in Figure 2, the air supply hole 221 is arranged on the top of the outer layer plate 22, and the diameter of the air supply hole 221 gradually expands from the end close to the fan 4 to the end far away from the fan 4. The air duct 5 is attached to the top of the outer plate 22 .

The interlayer 24 is provided with a plurality of ribs 8, and the ribs 8 are connected end to end to form a square ring fixedly arranged on the outer surface of the inner layer plate 21, and fixedly arranged on the inner surface of the outer layer plate 22, specifically , the plane where the square ring of the rib 8 is parallel to the plane where the rear wall of the liner 2 is located.

The two sides and the bottom of the interlayer 24 are provided with heating wires 7 , and the ribs 7 are provided with slots, and the heating wires 7 are fixed between the slots and the outer surface of the inner plate 21 .

During use, after the oven is energized and starts to work, the heating wire 7 starts to heat, so that the temperature of the gas in the interlayer 24 increases. The support is fixed, and the heating wire 7 is fixed on the outer side of the inner plate 21 at the same time.

As shown in Figures 6 and 7, the blower fan 4 rotates to suck the gas in the interlayer 24 from both sides to the top, and enters the air supply pipe 5 through the air supply hole 221. The gas is less affected by the fan 4, so the diameter of the air supply hole 221 gradually expands from one end of the fan 4 from near to far, which is beneficial for the gas at the far end to enter the air supply pipe 5, so that the gas in the interlayer 24 can evenly flow into the air supply Pipe 5, after the gas enters the fan 4 through the air supply pipe 5, the fan 4 sends the gas from the air connection pipe 41 to the interlayer 24 again, flows from the back of the interlayer 24 to both sides and the bottom of the interlayer 24, and flows back to the air delivery through the top again. The air duct 5 forms an external circulation, so that the heat of the gas in the interlayer 24 can be evenly distributed.

As shown in Figure 4, Figure 5 and Figure 6, driven by the temperature of the gas in the interlayer 24 and the continuous heating of the heating wire 7, the temperature of the inner plate 21 rises rapidly, so that the temperature of the gas in the inner cavity 23 continues to rise, and the motor 3 works The wind wheel 31 is driven to rotate, and the wind wheel 31 sucks the gas in the inner cavity 23, and then the wind wheel 31 throws the gas out from the side of the wind wheel 31, guided by the wind-inducing shell 6, and collected into the air-inducing shell 6 by the spiral shell 61. The air is blown out from the opening 62, and the gas enters the side air passage 26 and the lower air passage 27 through the air groove 281 in the rear air passage 29, and then is evenly blown into the inner cavity 23 by the mesh holes 251 of the ventilation screen 25, so that the product is evenly heated , and finally the gas is inhaled again by the wind wheel 31 in the inner cavity 23 to form an inner circulation.

After drying, the heating wire 7 stops heating, and the blower fan 4 continues to work, and the high-temperature gas in the interlayer 24 is removed through the air outlet 42, so that the temperature in the oven can be dropped rapidly.

The function of double-layer circulation makes the heat evenly distributed in the inner tank 2, so that the gas temperature in the inner tank 2 rises quickly, shortens the heating time, reduces the energy consumption, and the heat distribution is uniform, so that the drying effect of the product is better. After further improvement , as shown in Figure 1, the oven is equipped with two inner tanks 2, and more products can be dried at the same time during work, and the work efficiency is higher.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (9)

1. A double-layer circulating vacuum oven, characterized in that, comprising: A closed outer box and an inner tank arranged in the outer box, the inner tank is provided with an external circulation air duct system and an internal circulation air duct system; The internal circulation air duct system includes an inner layer board, a ventilation screen, a windshield, a wind wheel and a motor. The windshield is arranged at the rear of the inner cavity, the ventilation mesh plate is spaced from both sides of the inner cavity to form a side air channel, the ventilation mesh plate is spaced from the bottom of the inner cavity to form a lower air channel, and the windshield is spaced from the rear of the inner cavity to form a side air channel. The rear air ducts are formed at intervals, and the rear air ducts are respectively connected with the side air ducts and the lower air ducts. In the rear air duct, the wind wheel communicates with the inner cavity through the wind wheel hole provided on the windshield, the motor is arranged outside the inner tank, and the wind wheel is driven and connected to the motor through magnetic fluid. 2. A double-layer circulating vacuum oven as claimed in claim 1, characterized in that: the outer circulation air duct system includes an outer plate, an air supply pipe, an air connection pipe and a fan, and the outer plate and the The inner boards form interlayers at intervals, the outer boards are provided with air supply holes, the air supply pipes are arranged outside the outer layer boards, the interlayer communicates with the air supply pipes through the air supply holes, and the air supply pipes The pipe is in communication with the fan arranged outside the liner, the fan is in communication with the air connection pipe, and the air connection pipe is in communication with the interlayer. 3. A double-layer circulating vacuum oven as claimed in claim 1, characterized in that: said rear air passage is provided with an air-introducing shell, said air-inducing shell is wound around the outside of the wind wheel, said air-inducing shell includes A spiral shell and an opening, the opening of the air-inducing shell faces upward. 4. A double-layer circulating vacuum oven as claimed in claim 3, characterized in that: the two sides and the bottom of the windshield are provided with air grooves, and the rear air passage is respectively connected with the side air passage and the downwind through the air grooves. The road is connected. 5. A double-layer circulating vacuum oven as claimed in claim 2, characterized in that: the air supply hole is arranged on the top of the outer plate, and the diameter of the air supply hole is from one end close to the fan to one end far away from the fan. One end of the fan is gradually expanded, and the air supply pipe is attached to the top of the outer plate. 6. A double-layer circulating vacuum oven as claimed in claim 2, characterized in that: the interlayer is provided with a plurality of ribs, and the ribs are connected end to end to form a square ring and are fixed outside the inner plate surface, and fixedly arranged on the inner surface of the outer layer board. 7. A double-layer circulating vacuum oven as claimed in claim 6, characterized in that: heating wires are provided on both sides and the bottom of the interlayer, the ribs are provided with slots, and the heating wires are fixed on the Between the slot and the outer surface of the inner board. 8. A double-layer circulation vacuum oven as claimed in claim 2, characterized in that: the external circulation air duct system further includes an air exhaust port, and the air connecting pipe communicates with the air exhaust port. 9. A double-layer circulating vacuum oven as claimed in claim 1, characterized in that: the number of said inner tanks is two.