CN105546966B - A continuous heat pump drying system for dried fruit - Google Patents

Abstract

The invention relates to the technical field of drying equipment, in particular to a dry fruit continuous type heat pump drying system which comprises a feeding device, a drying device, a discharging device and a heating device, wherein the drying device comprises a drying tower and an air chamber which surrounds the outer side of the drying tower and is communicated with the drying tower, the feeding device is connected with the top of the drying tower so as to convey materials into the drying tower, the discharging device is connected with the bottom of the drying tower, the air chamber comprises a preheating air chamber, a drying air chamber and a cold air chamber which are sequentially arranged along the moving direction of the materials, the heating device comprises a heat pump, a tower inlet hot air pipeline and an air supplementing pipeline, one end of the tower inlet hot air pipeline is connected with the drying air chamber, the other end of the tower inlet hot air pipeline is connected with the heat pump so as to continuously provide hot air required by drying for the drying device, one end of. The heat pump drying temperature has the characteristics of controllability and low-speed low-temperature drying, the drying effect of dried fruit materials is ensured, the drying efficiency is greatly improved, and the resource waste is avoided.

Description

A continuous heat pump drying system for dried fruit

technical field

The invention relates to the technical field of drying equipment, in particular to a continuous heat pump drying system for dried fruits.

Background technique

Dried fruit drying is a necessary part of dried fruit storage. For a long time, dried fruit drying is mainly carried out by natural drying and fuel combustion drying devices. These two drying methods mainly have the following problems:

(1) Natural drying is affected by the weather, which can easily cause incomplete drying and deterioration of dried fruits, low drying efficiency, long time consumption and waste of manpower.

(2) The main problems of the fuel drying system are heavy environmental pollution, inconvenient temperature control, high temperature is easy to cause burns, and the quality of dried fruit drying is reduced.

Therefore, it is necessary to design and manufacture a continuous heat pump drying system for dried fruits that is suitable for efficient drying of dried fruits and environmental protection and energy saving.

Contents of the invention

(1) Technical problems to be solved

The technical problem to be solved by the present invention is that the existing drying technology is easily affected by the external environment, the drying efficiency of dried fruit is low, the drying of equipment causes serious environmental pollution, energy saving and environmental protection cannot be realized, and the temperature control is inconvenient to make the drying of dried fruit difficult. It is difficult to guarantee the dry quality.

(2) Technical solution

In order to solve the above technical problems, the present invention provides a continuous heat pump drying system for dried fruit, including a feeding device, a drying device, a discharge device and a heating device, the drying device includes a drying tower and surrounding the The air chamber on the outside of the drying tower and communicated with the drying tower, the feeding device is connected to the top of the drying tower to transport materials into the drying tower, the discharge device is connected to the drying tower The bottom of the drying tower is connected. The air chamber includes a preheating air chamber, a drying air chamber and a cold air chamber arranged in sequence along the moving direction of the material. The heating device includes a heat pump, a hot air pipeline entering the tower and a supplementary air pipe. One end of the hot air pipeline entering the tower is connected to the drying air chamber, and the other end is connected to the heat pump to continuously provide the drying device with hot air required for drying. The supplementary air pipeline One end is connected with the cold air chamber, and the other end is connected with the heat pump, so as to supplement the air volume to the heat pump.

Wherein, the heating device also includes a tower outlet wet air pipeline, one end of the tower outlet wet air pipeline is connected to the drying air chamber, and the connection is located between the tower inlet hot air pipeline and the drying chamber. Above the connection of the dry air chamber, the other end is connected to the heat pump, so as to send the wet air formed after drying back to the heat pump.

Wherein, the cold air chamber includes an upper air replenishment chamber and a lower cold air chamber, the upper air replenishment chamber is provided with a cold air outlet, and the air replenishment pipeline is connected with the upper air replenishment chamber, and the preheating air chamber 1. The drying air chamber, the upper supplementary air chamber and the lower cold air chamber are sequentially separated by dampers, the inner side of the damper is connected to the outer wall of the drying tower, and the outer side of the damper is connected to the inner wall of the air chamber.

Wherein, a hot air fan is provided on the hot air pipeline entering the tower; a dust collector is provided on the wet air pipeline exiting the tower; Normal temperature wind for material cooling.

Wherein, the outer surface of the drying tower is provided with evenly staggered hollow-shaped angular boxes for circulation and exchange of drying air with the air chamber.

Wherein, the discharge device includes a discharge cone connected to the bottom discharge port of the drying tower, a feed transmission mechanism and a discharge port, a plurality of the discharge cones are arranged side by side, and the feed The transmission mechanism includes a scraper and a sprocket drive assembly corresponding to each of the discharge cones, the scraper is arranged below the discharge cone, and the side of the scraper is close to the discharge cone The side of the wall plate of the bucket forms a discharge gap, the sprocket drive assembly is connected with the scraper to drive the scraper to rotate, and the discharge port is arranged below the scraper to pass through the scraper. The scraper rotates to make the material fall into the discharge opening.

Wherein, the discharge opening includes a lead screw, a discharge fixed plate and a slide plate, the lead screw and the slide plate are connected by nuts and screws, the side of the slide plate is close to the discharge fix plate, and the lead screw It is connected with the discharge fixed plate, and one end is connected with the rotating handwheel through a lock nut, and the other end is provided with a screw support.

Wherein, the sprocket drive assembly includes a discharge feed sprocket, a drive sprocket and a drive motor, one end of the scraper is connected to the discharge feed sprocket through a locking support, and the other end is connected to the discharge feed sprocket through a bearing. The drying tower is supported and connected, the driving sprocket is connected with the discharge feeding sprocket through a chain, and the driving motor is connected with the driving sprocket to drive the driving sprocket to rotate.

Wherein, the sprocket drive assembly also includes a tensioning sprocket and a sprocket slide bar, the tensioning sprocket is arranged inside the chain and below the discharge feeding sprocket, and the tensioning chain The sprocket slides on the sprocket sliding rod through the sprocket support rod to change the position of the tensioning sprocket to adjust the tension force. The sprocket support rod and the sprocket sliding rod pass through the locking bolt connect.

Wherein, the feeding device includes a lifter and a tower feeding pipe, one end of the tower feeding pipe is connected to the elevator, and the other end is connected to the top of the drying tower.

(3) Beneficial effects

The above-mentioned technical solution of the present invention has the following advantages: the dried fruit continuous heat pump drying system of the present invention realizes continuous supply to the drying device through the joint cooperation of the heat pump of the heating device, the hot air pipeline entering the tower and the supplementary air pipeline. Heat, the dried fruit material enters the drying tower through the feeding device, and is dried under the action of the flow wind field formed in the drying tower under the action of the heating device and the air chamber, and the drying tower is connected by the outer air chamber. The preheating section, drying section and cooling section are also formed accordingly. After the material passes through the preheating section, it enters the drying section for gradual drying. The drying speed is controlled by the gravity of the material and the slow operation of the discharge system. The entire drying process It can be adjusted in time according to the moisture and quality of the dried material. After the material is dried in the drying section, it enters the cold air section for cooling, usually using normal temperature air to cool to room temperature, so as to meet the technical requirements of the drying material, and finally through the discharge The device is discharged. Compared with traditional fuel drying, the heat pump drying temperature has the characteristics of controllability and slow low-temperature drying, thus ensuring the high-quality drying effect of dried fruit materials, and the production process is energy-saving and environmentally friendly. At the same time, the formation of the flowing wind field The continuous heating mode also greatly improves the drying efficiency of dried fruit materials, saves manpower and material resources, and avoids waste of resources.

In addition to the above-described technical problems solved by the present invention, the technical features of the formed technical solutions and the advantages brought by the technical features of these technical solutions, other technical features of the present invention and the advantages brought by these technical features, Further description will be made in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a schematic structural view of a dried fruit continuous heat pump drying system according to an embodiment of the present invention;

Fig. 2 is a schematic structural view of a dried fruit continuous heat pump drying system according to an embodiment of the present invention;

Fig. 3 is a schematic structural view of a discharge device of a dried fruit continuous heat pump drying system according to an embodiment of the present invention;

Fig. 4 is a top view of part A in Fig. 3;

Fig. 5 is a schematic structural view of the discharge port of the dried fruit continuous heat pump drying system according to the embodiment of the present invention.

In the figure: 1: feeding device; 2: drying device; 3: discharging device; 4: heating device; 11: elevator; 12: feeding pipe into the tower; 21: drying tower; 22: preheating Air chamber; 23: drying air chamber; 24: upper supply air chamber; 25: lower cold air chamber; 26: damper; 31: discharge cone; 32: feed transmission mechanism; 33: discharge port; Material gap; 41: heat pump; 42: hot air pipeline entering the tower; 43: supply air pipeline; 44: wet air pipeline exiting the tower; 45: cold air pipeline; 211: corner box; 241: cold air outlet; 321 : scraper; 322: discharge feed sprocket; 323: driving sprocket; 324: driving motor; 325: tensioning sprocket; 326: chain; 327: locking support; 328: sprocket slide bar; 329 : sprocket support rod; 320: locking bolt; 331: lead screw; 332: discharge fixing plate; 333: slide plate; 334: nut; 335: screw; 336: locking nut; 337: rotating handwheel; 338: Lead screw support; 421: hot air blower; 441: dust collector; 451: cold air blower.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In addition, in the description of the present invention, unless otherwise specified, the meanings of "multiple", "multiple roots" and "multiple groups" are two or more, "several", "several roots", "several "Group" means one or more than one.

As shown in Figure 1 and Figure 2, the dried fruit continuous heat pump drying system provided by the embodiment of the present invention includes a feeding device 1, a drying device 2, a discharge device 3 and a heating device 4, and the drying device 2 includes a drying device The drying tower 21 and the air chamber surrounding the outside of the drying tower 21 and communicating with the drying tower 21, the feeding device 1 is connected with the top of the drying tower 21 to transport materials to the drying tower 21, and the discharge device 3 is connected with the drying tower 21. The bottom of the dry tower 21 is connected. The air chamber includes a preheating air chamber 22, a drying air chamber 23 and a cold air chamber arranged in sequence along the moving direction of the material. The heating device 4 includes a heat pump 41, a hot air pipeline 42 entering the tower and a supplementary air Pipeline 43, one end of the hot air pipeline 42 entering the tower is connected to the drying air chamber 23, and the other end of the hot air pipeline 42 entering the tower is connected to the heat pump 41 to continuously provide the drying device 2 with the hot air required for drying. One end of the air pipeline 43 is connected to the cold air chamber, and the other end of the supply air pipeline 43 is connected to the heat pump 41 to supplement the air volume to the heat pump 41 .

The dried fruit continuous heat pump drying system of the present invention realizes continuous heat supply to the drying device through the joint cooperation of the heat pump of the heating device, the hot air pipeline entering the tower and the supplementary air pipeline, and the dried fruit material enters the drying device through the feeding device. Drying tower, and under the action of the heating device and the air chamber, drying is carried out under the action of the flowing wind field formed in the drying tower, and the drying tower also forms a preheating section and a drying section under the connection of the outer air chamber. Section and cooling section, the material enters the drying section after the preheating section for gradual drying. The drying speed is controlled by the gravity of the material and the slow operation of the discharge system. The entire drying process can be carried out according to the moisture and quality of the dried material. Timely adjustment, after the material is dried in the drying section, it enters the cold air section for cooling, usually using normal temperature air to cool to room temperature, so as to meet the technical requirements for drying the material, and finally discharged through the discharge device. Compared with traditional fuel drying, the heat pump drying temperature has the characteristics of controllability and slow low-temperature drying, thus ensuring the high-quality drying effect of dried fruit materials, and the production process is energy-saving and environmentally friendly. At the same time, the formation of the flowing wind field The continuous heating mode also greatly improves the drying efficiency of dried fruit materials, saves manpower and material resources, and avoids waste of resources.

Specifically, the heating device 4 also includes a tower outlet wet air pipeline 44, one end of the tower outlet wet air pipeline 44 is connected to the drying air chamber 23, and the connection is located between the tower inlet hot air pipeline 42 and the drying air chamber 23. Above the connection, the other end of the tower outlet wet air pipeline 44 is connected to the heat pump 41 to send the dried wet air back to the heat pump 41 . The drying hot air enters the drying chamber through the hot air pipeline into the tower, and then reaches the drying section of the drying tower. As the hot air continues to rise, the temperature gradually drops. The cold and wet wind with moisture, the cold and wet wind re-enters the heat pump through the wet air pipeline out of the tower for dehumidification, forming a circulation flow of the drying air in turn, making the drying air more fully utilized and avoiding unnecessary waste of resources , also further improved the drying effect.

Wherein, the cold air chamber includes an upper section air supply chamber 24 and a lower section cold air chamber 25, the upper section air supply chamber 24 is provided with a cold air outlet 241, and the supply air pipeline 43 is connected with the upper section air supply chamber 24, the preheating air chamber 22, drying The air chamber 23 , the upper section supplementary air chamber 24 and the lower section cold air chamber 25 are successively separated by the damper 26 , the inner side of the damper 26 is connected with the outer wall of the drying tower 21 , and the outer side of the damper 26 is connected with the inner wall of the air chamber. In order to make up for the loss of air volume of the entire drying system and take into account the efficient use of heat energy, the cooling return air of the drying material is used to supplement the air of the heat pump. The setting of the supplementary air chamber in the upper section allows the outside normal temperature air to enter the cooling section of the drying tower through the cold air outlet, and at the same time connect the supplementary air pipeline, which can not only cool the dried fruit materials in the cooling section, but also increase the air volume for the heat pump. Supplement after loss.

Further, a hot air blower 421 is provided on the hot air pipeline 42 entering the tower; a dust collector 441 is provided on the wet air pipeline 44 exiting the tower; 21 provides the normal temperature wind that makes material cool down. The hot air for drying is provided by the dehumidification of the heat pump. The hot air enters the hot air chamber of the drying tower by means of the hot air blower. After the hot air dries the materials in the drying tower, it forms a dehumidifying air with dried fruit waste. It enters the dust collector to remove waste residue, and then enters the heat pump for dehumidification. The dehumidified air after dust removal enters the heat pump system for dehumidification, thus forming a circulating air process of hot air-drying-wet air-dust removal-dehumidification-hot air, achieving the efficiency of drying materials. Low energy consumption, high efficiency, no emission and no pollution. The outside room temperature air is drawn into the cold air duct through the cooling fan, and enters the cold air chamber through the cold air outlet to cool the crucible material in the cooling section of the drying tower.

Wherein, as shown in FIG. 2 , the outer surface of the drying tower 21 is provided with hollow-shaped angular boxes 211 evenly and staggeredly distributed to communicate and exchange drying air with the air chamber. The angular box is responsible for the flow guidance and distribution of the air field in the drying tower, as well as the drying air circulation between the drying tower and the air chamber, which not only optimizes the structure of the drying device, but also promotes the heat exchange of dried fruit materials, so that Dried fruit materials can be heated evenly in each stage of the drying process, ensuring the drying quality and improving the drying efficiency.

Specifically, as shown in Figure 3 and Figure 4, the discharge device 3 includes a discharge cone 31 connected to the bottom discharge port of the drying tower 21, a feed transmission mechanism 32 and a discharge port 33, a plurality of discharge The cone buckets 31 are arranged side by side, and the feed transmission mechanism 32 includes a scraper 321 and a sprocket drive assembly corresponding to each discharge cone 31. The scraper 321 is arranged below the discharge cone 31, and the side of the scraper 321 A discharge gap 34 is formed on the side of the wall plate close to the discharge cone 31. The sprocket drive assembly is connected with the scraper 321 to drive the scraper 321 to rotate. The discharge port 33 is arranged below the scraper 321 to pass through the scraper. 321 rotation makes the material fall into the discharge port 33. The gap between the discharge cone and the scraper has the structural characteristics of being able to adjust and adapt to the discharge of materials of different sizes. The dried fruit material enters the discharge cone after drying and cooling. The discharge cone is equipped with a fixed discharge cone wall plate The support plate, the scraper rotates under the drive of the sprocket drive assembly, and the material is brought into the discharge port and discharged, thus forming the adaptive discharge of the material by the discharge device.

Wherein, as shown in Figure 5, the discharge port 33 includes a lead screw 331, a discharge fixed plate 332 and a slide plate 333, the lead screw 331 and the slide plate 333 are connected by a nut 334 and a screw 335, and the side of the slide plate 333 is close to the discharge fixed plate 332, the lead screw 331 is connected with the discharge fixing plate 332, and one end of the lead screw 331 is connected with the rotating handwheel 337 through a lock nut 336, and the other end of the lead screw 331 is provided with a lead screw support 338. Turning the rotating hand wheel can make the screw drive the nut to rotate, and the slide plate fastened by the nut also rotates accordingly, so as to adjust the opening and closing size between the side of the slide plate and the discharge fixed plate, and realize the control of the discharge volume Flexible connection to the entire discharge opening.

Wherein, as shown in Fig. 3 and Fig. 4, the sprocket drive assembly includes a discharge feed sprocket 322, a drive sprocket 323 and a drive motor 324, and one end of the scraper 321 is connected to the discharge feed sprocket through a locking support 327. 322 connection, the other end of the scraper 321 is supported and connected with the drying tower 21 through a bearing, the drive sprocket 323 is connected with the discharge feed sprocket 322 through a chain 326, and the drive motor 324 is connected with the drive sprocket 323 to drive the drive sprocket 323 turns. The drive motor controls the rotation of the drive sprocket to provide driving force for the entire sprocket drive assembly. The discharge feed sprocket drives the scraper to rotate the discharge, which can realize the adjustment of the material discharge speed, and then realize the rationality of the material baking speed. Control, which is conducive to enhancing the controllability of the entire drying system for the drying process of dried fruit materials.

Wherein, the sprocket transmission assembly also includes a tensioning sprocket 325 and a sprocket sliding bar 328, the tensioning sprocket 325 is arranged on the inner side of the chain 326, and the tensioning sprocket 325 is located below the discharge feeding sprocket 322, and the tensioning chain The wheel 325 slides on the sprocket slide bar 326 through the sprocket support bar 329 to change the position of the tension sprocket 325 to adjust the tension force. . One end of the sprocket support rod is fixedly connected to the tensioning sprocket, and the other end moves on the sprocket sliding rod, and is fastened to the sprocket sliding rod by locking bolts, thereby changing the position of the tensioning sprocket and adjusting The tension of the chain enables the sprocket drive assembly to achieve the best transmission effect, ensuring the continuity and smoothness of the scraper rotation.

In addition, as shown in Figure 1, the feeding device 1 includes an elevator 11 and a tower feeding pipe 12, one end of the tower feeding pipe 12 is connected to the elevator 11, and the other end of the feeding pipe 12 is connected to the drying tower 21 top connection. The dried fruit material is sent to the top of the drying tower through the elevator, and then enters the inside of the drying tower through the tower feeding pipe, first passes through the preheating section, then passes through the drying section, and finally enters the cooling section and is discharged, thus ending the entire drying process process.

To sum up, the dried fruit continuous heat pump drying system of the present invention realizes continuous heat supply to the drying device through the cooperation of the heat pump of the heating device, the hot air pipeline entering the tower and the supplementary air pipeline, and the dried fruit material passes through The feeding device enters the drying tower, and is dried under the action of the flow wind field formed in the drying tower under the action of the heating device and the air chamber. The heating section, drying section and cooling section, the material enters the drying section after the preheating section for gradual drying, the drying speed is controlled by the gravity of the material and the slow operation of the discharge system, the whole drying process can be controlled according to the drying material The moisture and quality of the raw materials are adjusted in a timely manner. After the materials are dried in the drying section, they enter the cold air section for cooling. Usually, normal temperature air is used to cool them to room temperature, so as to meet the technical requirements of drying materials, and finally discharged through the discharge device. Compared with traditional fuel drying, the heat pump drying temperature has the characteristics of controllability and slow low-temperature drying, thus ensuring the high-quality drying effect of dried fruit materials, and the production process is energy-saving and environmentally friendly. At the same time, the formation of the flowing wind field The continuous heating mode also greatly improves the drying efficiency of dried fruit materials, saves manpower and material resources, and avoids waste of resources.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (9)

1. A dried fruit continuous heat pump drying system, characterized in that: it comprises a feeding device, a drying device, a discharge device and a heating device, and the drying device comprises a drying tower and surrounds the outside of the drying tower And the air chamber communicated with the drying tower, the feeding device is connected with the top of the drying tower to transport materials into the drying tower, the discharge device is connected with the drying tower The bottom is connected. The air chamber includes a preheating air chamber, a drying air chamber and a cold air chamber arranged in sequence along the moving direction of the material. The heating device includes a heat pump, a hot air pipeline entering the tower and a supplementary air pipeline. One end of the hot air pipeline entering the tower is connected to the drying air chamber, and the other end is connected to the heat pump to continuously provide hot air required for drying to the drying device. One end of the supplementary air pipeline is connected to the The other end is connected to the cold air chamber, and the other end is connected to the heat pump to supplement the air volume to the heat pump; the discharge device includes a discharge cone connected to the bottom discharge port of the drying tower, a feed transmission mechanism and a discharge At the discharge port, a plurality of the discharge cones are arranged side by side, and the feed transmission mechanism includes a scraper and a sprocket drive assembly corresponding to each of the discharge cones, and the scraper is arranged on the discharge cone below the bucket, and the side of the scraper is close to the wall side of the discharge cone to form a discharge gap, the sprocket drive assembly is connected with the scraper to drive the scraper to rotate, The discharge opening is arranged below the scraper, so that the material falls into the discharge opening through the rotation of the scraper. 2. The dried fruit continuous heat pump drying system according to claim 1, characterized in that: the heating device also includes a tower outlet wet air pipeline, one end of the tower outlet wet air pipeline is connected to the drying air The chamber is connected, and the connection is located above the connection between the hot air pipeline entering the tower and the drying air chamber, and the other end is connected to the heat pump, so as to send the wet air formed after drying back to the heat pump. 3. The dried fruit continuous heat pump drying system according to claim 2, characterized in that: the cold air chamber comprises an upper air supply chamber and a lower air supply chamber, the upper air supply chamber is provided with a cold air outlet, and the The supplementary air pipeline is connected with the upper supplementary air chamber, the preheating air chamber, the drying air chamber, the upper supplementary air chamber and the lower cold air chamber are separated by dampers in sequence, and the inside of the damper is separated from the The outer wall of the drying tower is connected, and the outer side of the damper is connected with the inner wall of the air chamber. 4. The dried fruit continuous heat pump drying system according to claim 3, characterized in that: a hot air blower is provided on the hot air pipeline entering the tower; a dust collector is provided on the wet air pipeline exiting the tower; The outlet is connected to the cooling fan through the cold air pipeline to provide the drying tower with normal temperature air to cool the material. 5. The dried fruit continuous heat pump drying system according to claim 4, characterized in that: the outer surface of the drying tower is provided with evenly staggered hollow-shaped angular boxes for drying with the air chamber Wind circulation and exchange. 6. The dried fruit continuous heat pump drying system according to claim 5, characterized in that: the discharge port includes a lead screw, a discharge fixing plate and a slide plate, and the lead screw and the slide plate are connected by nuts and screws , the side of the slide plate is close to the discharge fixed plate, the screw is connected to the discharge fixed plate, and one end is connected to the rotating handwheel through a lock nut, and the other end is provided with a screw support. 7. The dried fruit continuous heat pump drying system according to claim 6, characterized in that: the sprocket drive assembly includes a discharge feed sprocket, a drive sprocket and a drive motor, and one end of the scraper is locked The support member is connected with the discharge feed sprocket, and the other end is supported and connected with the drying tower through a bearing, the driving sprocket is connected with the discharge feed sprocket through a chain, and the drive motor is connected with the The drive sprocket is connected to drive the drive sprocket to rotate. 8. The dried fruit continuous heat pump drying system according to claim 7, characterized in that: the sprocket drive assembly also includes a tensioning sprocket and a sprocket sliding rod, and the tensioning sprocket is arranged on the chain Inside, and located below the discharge feed sprocket, the tensioning sprocket slides on the sprocket sliding rod through the sprocket support rod to change the position of the tensioning sprocket for tensioning Adjustment, the sprocket support rod is connected with the sprocket sliding rod through locking bolts. 9. The dried fruit continuous heat pump drying system according to claim 8, characterized in that: the feeding device includes a hoist and a feeding pipe into the tower, and one end of the feeding pipe into the tower is connected to the hoist , and the other end is connected to the top of the drying tower.