TWI819903B - Return air conveying device - Google Patents

Abstract

The invention provides a return air conveying device, which comprises a conveyor, several blower fans and a return air chamber, wherein the conveyor mainly comprises a conveyor belt and a drive unit, the conveyor belt is used to carry the objects to be dried, the conveyor belt forms a plurality of channels for air to pass through. The blower fan is arranged above the conveyor belt, which is used to blow air to dry the objects, and the return air chamber is arranged below the conveyor belt. The bottom edge of the return air chamber is provided with a bottom plate, which enables the air entering the return air chamber to return upward, thereby improving the air drying efficiency. At least one air duct is laterally connected with the return air chamber, thereby discharging the water and air in the return air chamber. The object is prevented from floating due to the return air, thus helping to improve the air drying efficiency.

Description

Conveyor device with return air

The present invention relates to a conveyor device for air-drying objects; in particular, it relates to a revealer of an innovative structural type of a conveyor device capable of returning air.

Food is filled inside the packaging material, and then the packaging material is sealed to become packaged food. The packaging material includes but is not limited to soft bags. Based on the type of the food and packaging material, as well as the choice of packaging method, a certain For some packaged foods, during the process of filling the food or sealing the packaging material, the surface of the packaging material is contaminated with the food. The packaged food needs to be cleaned and then dried to remove the moisture attached to the surface of the packaging material due to cleaning.

A conventional conveyor device for air-drying objects includes a closed loop conveyor belt, a drive unit, several air blowers and a frame, wherein the conveyor belt, the drive unit and the air blowers are respectively positioned on the machine. The conveyor belt is used to carry objects to be air-dried. The drive unit drives the conveyor belt to rotate so that the conveyor belt transports the objects. The conveyor belt is distributed to form a plurality of channels for air to pass through. Each air blower is arranged along the The air blower is arranged above the conveyor belt in sequence along the conveying direction of the conveyor belt, and the air blower is used to blow air to the conveyor belt.

The cleaned packaged food is thrown onto the conveyor belt. As the drive unit drives the conveyor belt to run, the conveyor belt carries the packaged food to move. The air blower blows air to the conveyor belt to form an air flow. The relatively dry air contacts and absorbs The moist air that has absorbed the moisture on the surface of the packaged food enters the space below the conveyor belt through the channel, thereby removing the moisture attached to the surface of the packaging material during the transportation of the packaged food.

After investigation, it was found that the conventional conveying device still has the following problems and disadvantages in practical application experience: the air blower blows air from above the conveyor belt toward the packaged food passing below the air blower, and the air subsequently enters the package through the channel. In the space below the conveyor belt, the moisture attached between the bottom of the packaged food and the conveyor belt is difficult to contact with the air flowing from top to bottom, making it difficult for the bottom of the packaged food to dry. Usually, the air blower can be raised to blow The air flow rate or slowing down the running speed of the conveyor belt can improve the aforementioned problem that the bottom of the packaged food is difficult to dry. However, both of these methods increase power consumption and the drying efficiency needs to be improved.

The main purpose of the present invention is to provide a conveyor device that can return air. The technical problem it aims to solve is to think about innovative breakthroughs with the goal of developing a new conveyor device that is more ideal and practical.

Based on the aforementioned objectives, the technical features of the present invention to solve the problem mainly lie in that the air-returning conveying device includes:

A conveyor. The conveyor mainly includes a closed loop conveyor belt and a drive unit. The conveyor belt and the drive unit are respectively arranged on a frame. The conveyor belt is used to carry objects to be dried. The conveyor belt The belt is distributed to form a plurality of channels for air to pass through, the driving unit is connected to the conveyor belt, and the driving unit is used to drive the conveyor belt to run;

Several air blowers are installed on the frame, and each air blower is arranged above the conveyor belt in sequence along the conveying direction of the conveyor belt. The air blowers are used to blow air to the conveyor belt to dry the object;

A return air chamber is provided below the conveyor belt. The bottom edge of the return air chamber is provided with a bottom plate. The bottom plate and the conveyor belt are opposite to each other, so that the air entering the return air chamber flows upward, thereby drying the object facing the conveyor belt. The direction side of the return air chamber improves air drying efficiency;

The lateral periphery of the return air chamber is surrounded by two side plates and two end plates, defining a first direction passing through the conveyor belt and the bottom plate, defining a second direction parallel to the conveying direction of the conveyor belt, and each end plate is along the conveyor belt. The second direction is opposite, a third direction is defined to be orthogonal to the first direction and the second direction, and the side panels are opposite along the third direction;

At least one exhaust duct is laterally connected to the return air chamber along the third direction. The return air chamber is connected to the external environment through the exhaust duct, whereby moisture in the return air chamber is discharged and the object is prevented from being affected by return air. It floats due to its action, assisting in improving air-drying efficiency.

The main effect and advantage of the present invention is that the air flowing from top to bottom through the channel can be turned from bottom to top through the channel to form a return air phenomenon, making the bottom of the object easy to dry and improving drying efficiency.

Please refer to the drawings, which are embodiments of the air return conveying device of the present invention. However, these embodiments are for illustration only and are not limited by this structure in patent applications.

As shown in FIGS. 1 to 4 , the first embodiment of the conveyor device with return air includes a conveyor 10 , several air blowers 20 and a return air chamber 30 . The conveyor 10 mainly includes a closed return air chamber 30 . A circular conveyor belt 12 and a driving unit 14, wherein the conveyor belt 12 and the driving unit 14 are respectively arranged on a frame 16, the conveyor belt 12 is used to carry the objects 90 to be dried, and the conveyor belt 12 is distributed to form There are a plurality of channels 13 for air to pass through. The drive unit 14 is connected to the conveyor belt 12. The drive unit 14 is used to drive the conveyor belt 12 to run. The conveyor 10 is an existing equipment familiar to those in the field to which the present invention belongs. The specific structure of the conveyor 10 will not be fully described in detail.

The air blowers 20 are arranged on the frame 16 . Each of the air blowers 20 is sequentially arranged above the conveyor belt 12 along the conveying direction of the conveyor belt 12 . The air blowers 20 are used to blow air to the conveyor belt 12 . Object 90 is dry.

The return air chamber 30 is disposed below the conveyor belt 12 . The bottom edge of the return air chamber 30 is provided with a bottom plate 42 . The bottom plate 42 and the conveyor belt 12 face each other up and down, so that the air return chamber 30 enters the return air chamber 30 through the channel 13 . The air backflows upward, so that the direction side of the air-dried object 90 faces the return air chamber 30, thereby improving the air-drying efficiency.

The return air chamber 30 is surrounded by two side plates 44 and two end plates 46 , defining a first direction 52 passing through the conveyor belt 12 and the bottom plate 42 , and defining a second direction 54 parallel to the conveying direction of the conveyor belt 12 , each of the end plates 46 faces each other along the second direction 54 , a third direction 56 is defined that is orthogonal to the first direction 52 and the second direction 54 , and each of the side plates 44 faces along the third direction 56 .

In this example, the return air chamber 30 is formed inside a box-like structure 40 which is mainly composed of the bottom plate 42 , the side plates 44 and the end plates 46 . The return air chamber 30 passes through the box-like structure 40 The top edge opens to the bottom edge of the conveyor belt 12 .

At least one exhaust duct 32 is laterally connected to the return air chamber 30 along the third direction 56 . The return air chamber 30 is connected to the external environment through the exhaust duct 32 , whereby the moisture in the return air chamber 30 is discharged, and This prevents the object 90 from floating due to the return air, thereby helping to improve the air-drying efficiency.

The number of the exhaust ducts 32 can be increased or decreased as needed. In this example, there are two exhaust ducts 32 . The return air chamber 30 is connected to the external environment through each of the exhaust ducts 32 , and each of the exhaust ducts 32 is connected to the external environment respectively. The top edges of the side plates 44 are adjacent to each other.

Based on the above structural configuration and technical features, the first embodiment of the air return conveying device of the present invention is used as shown in Figure 4. The air blower 20 passes from the top of the conveyor belt 12 to the bottom of the air blower 20. The object 90 blows air, and the air enters the return air chamber 30 through the channel 13. The air flowing from top to bottom is blocked by the bottom plate 42, and then flows back from bottom to top toward the conveyor belt 12 and passes through the channel. 13 forms a return air phenomenon, and part of the air flowing upward through the channel 13 contacts the bottom edge of the object 90 and the part of the conveyor belt 12 that contacts the object 90, so that the bottom edge of the object 90 and the conveyor belt 12 contact The part of the object 90 can be air-dried, and the bottom of the object 90 can be easily dried without using means such as increasing the flow rate of the air blown by the air blower 20 or slowing down the running speed of the conveyor belt 12, thereby improving the drying efficiency.

In addition to the air that enters the return air chamber 30 flowing back from bottom to top, a part of the air flows to the external environment through the exhaust duct 32 to prevent the air pressure in the return air chamber 30 from excessively rising and hindering the air from continuing to pass through the conveyor belt. 12 enters the return air chamber 30, and allows the part of the air that has absorbed moisture and increased humidity to flow out through the exhaust duct 32 to prevent the air humidity inside the return air chamber 30 from being too high and affecting the upward return air to absorb water. The ability to dry the bottom of the object 90 is thus ensured.

Furthermore, the formation of the exhaust duct 32 can prevent the return air chamber 30 from flowing upward and exerting an excessive return air force on the object 90 through the channel 13, and the object 90 will not be damaged due to the return air force. Floating displacement or flipping prevents multiple objects 90 arranged on the conveyor belt 12 from overlapping each other due to the return air force, which is beneficial to maintaining drying efficiency.

The air entering the return air chamber 30 can choose to flow to the external environment along the second direction 54 or the third direction 56 , and the third direction 56 is orthogonal to the conveying direction of the conveyor belt 12 , and the third direction 56 is orthogonal to the conveying direction of the conveyor belt 12 . Depending on the conveying direction of the conveyor belt 12, the exhaust duct 32 discharges part of the air entering the return air chamber 30 to the side of the conveying direction. The conveying length of the conveyor belt 12, through the exhaust duct 32 will not affect the outward flowing air. The air blown by the air blowers 20 arranged along the conveying direction of the conveyor belt 12 will not easily interfere with each other to form turbulent flow when flowing outward through the exhaust duct 32. On the premise of preventing the object 90 from floating due to the return air flowing from the bottom up, the return air effect can be stably maintained in a better state and the effectiveness of the air return flow from the bottom up is improved.

The frame 16 is provided with several adjustment structures 17. Each of the adjustment structures 17 is connected to the box-shaped structure 40, thereby raising and lowering the return air chamber 30 and changing the size of the exhaust duct 32 in the first direction 52. Depending on the size of the object 90, the density of the objects 90 distributed on the conveyor belt 12, the flow rate of the air blown by the blower 20, etc., the size of the exhaust duct 32 in the first direction 52 can be changed. The flow rate and flow rate of air flowing outward through the exhaust duct 32 .

As shown in FIGS. 5 and 6 , the second embodiment is mainly different from the first embodiment in that each side plate 44 penetrates along the third direction 56 to form a plurality of exhaust ducts 32 , and each exhaust duct is 32 approaches the conveyor belt 12 in the first direction 52 .

As shown in FIG. 7 , the third embodiment is mainly different from the first embodiment in that the box-shaped structure 40 is installed on a support frame 60 , and the support frame 60 is provided with a plurality of adjustment parts 62 , and each adjustment part 62 is connected to the The box-shaped structure 40 lifts and lowers the return air chamber 30 accordingly, thereby changing the size of the exhaust duct 32 in the first direction 52 .

10:Conveyor 12: Conveyor belt 13:Channel 14: Drive unit 16:Rack 17:Adjustment structure 20: Blower 30:Return air room 32:Exhaust duct 40:Box structure 42:Base plate 44:Side panel 46:End plate 52:First direction 54:Second direction 56:Third direction 60: Support frame 62:Adjustment Department 90:Object

Figure 1 is a schematic three-dimensional view of Embodiment 1 of the present invention. Figure 2 is a partially enlarged top view of a conveyor belt according to Embodiment 1 of the present invention. Figure 3 is a cross-sectional view of Embodiment 1 of the present invention. Figure 4 is a schematic cross-sectional view of the first embodiment of the present invention in use. Figure 5 is a schematic three-dimensional view of the second embodiment of the present invention. Figure 6 is a schematic cross-sectional view of the second embodiment of the present invention in use. Figure 7 is a schematic three-dimensional view of the third embodiment of the present invention.

10:Conveyor

12: Conveyor belt

14: Drive unit

16:Rack

17:Adjustment structure

20: Blower

30:Return air room

32:Exhaust duct

40:Box structure

44:Side panel

46:End plate

52:First direction

54:Second direction

56:Third direction

Claims (5)

A conveying device that can return air, including: A conveyor. The conveyor mainly includes a closed loop conveyor belt and a drive unit. The conveyor belt and the drive unit are respectively arranged on a frame. The conveyor belt is used to carry objects to be dried. The conveyor belt The belt is distributed to form a plurality of channels for air to pass through, the driving unit is connected to the conveyor belt, and the driving unit is used to drive the conveyor belt to run; Several air blowers are installed on the frame, and each air blower is arranged above the conveyor belt in sequence along the conveying direction of the conveyor belt. The air blowers are used to blow air to the conveyor belt to dry the object; A return air chamber is provided below the conveyor belt. The bottom edge of the return air chamber is provided with a bottom plate. The bottom plate and the conveyor belt are opposite to each other, so that the air entering the return air chamber flows upward, thereby drying the object facing the conveyor belt. The direction side of the return air chamber improves air drying efficiency; The lateral periphery of the return air chamber is surrounded by two side plates and two end plates, defining a first direction passing through the conveyor belt and the bottom plate, defining a second direction parallel to the conveying direction of the conveyor belt, and each end plate is along the conveyor belt. The second direction is opposite, a third direction is defined to be orthogonal to the first direction and the second direction, and the side panels are opposite along the third direction; At least one exhaust duct is laterally connected to the return air chamber along the third direction. The return air chamber is connected to the external environment through the exhaust duct, whereby moisture in the return air chamber is discharged and the object is prevented from being affected by return air. It floats due to its action, assisting in improving air-drying efficiency. The conveyor device capable of returning air as described in claim 1 includes two exhaust ducts, wherein each exhaust duct is adjacent to the top edge of each side panel. The conveyor device capable of return air as described in claim 1 or 2, wherein the return air chamber is formed inside a box-like structure mainly composed of the bottom plate, each side plate and each end plate, and the return air chamber The top edge of the box-like structure is open to the bottom edge of the conveyor belt. The frame is provided with several adjustment structures. Each adjustment structure is connected to the box-like structure respectively, thereby raising and lowering the return air chamber, thereby changing the exhaust air. The size of the track in the first direction. The conveyor device capable of return air as described in claim 1 or 2, wherein the return air chamber is formed inside a box-like structure mainly composed of the bottom plate, each side plate and each end plate, and the return air chamber The top edge of the box-like structure is open to the bottom edge of the conveyor belt. The box-like structure is installed on a support frame. The support frame is provided with several adjustment parts. Each adjustment part is connected to the box-like structure respectively, and can be raised and lowered accordingly. The return air chamber thereby changes the size of the exhaust duct in the first direction. The conveyor device with return air as described in claim 1 includes a plurality of the exhaust ducts, wherein each side plate penetrates through the third direction to form an exhaust duct, and each of the exhaust ducts is located in the first direction to approach the conveyor belt.

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