Air source heat pump baking machine

Abstract

The invention relates to the technical field of baking equipment, in particular to an air source heat pump baking machine which comprises a conveying table, a screening mechanism, a baking box and a collecting mechanism, a conveying belt is arranged on the inner side of the conveying table, and the screening mechanism is arranged on one side of the top of the conveying table and used for storing and dispersing nuts onto the conveying belt; the baking box is in an inverted U shape and is fixedly arranged on the conveying table. The collecting mechanism is arranged on the top wall of the baking box and used for collecting and absorbing dust attached to the surfaces of the nuts. According to the nut baking device, nuts are slowly conveyed at a constant speed through the conveying belt, baking is conducted in the mode that the air source heat pump blows hot air, compared with a traditional electric heating mode, the mild baking mode is beneficial to slow heating and drying, the situation that the sugar of the nuts is caramelized due to too fast temperature rising is avoided, and therefore the product quality can be improved.

Description

Technical Field

[0001] This invention relates to the field of baking equipment technology, specifically to an air source heat pump baking machine. Background Technology

[0002] In the field of agricultural and sideline product drying and processing, drying and roasting equipment is the core equipment for achieving rapid removal of moisture from materials and ensuring the stability of product storage, especially indispensable in nut processing. Nuts have a high moisture content and are rich in reducing sugars, with the sugar distribution showing a higher concentration in the center than at the outside. Traditional direct roasting methods can easily cause the center of the nut to turn dark brown due to excessively high local temperatures and caramelization of sugars, affecting its edible quality.

[0003] Existing nut roasting technologies generally suffer from poor drying uniformity. Specifically, most equipment uses a crude feeding method where nuts are directly poured into the roasting chamber. As the nuts pile up, the surface and inner layers are heated unevenly, resulting in some nuts being over-roasted and scorched, while others fail to meet the preset drying standards, leading to a lower product yield. Furthermore, traditional roasting equipment relies heavily on electric heating, leaving high residual temperatures inside the chamber after roasting. Operators cannot immediately collect the material and must wait for the equipment to cool down, extending the production cycle and reducing overall drying efficiency.

[0004] Therefore, existing equipment struggles to balance the demands for gentle roasting and uniform heating, failing to effectively address issues such as browning of nuts, uneven drying, and inconvenient subsequent collection, thus hindering the efficient and high-quality development of the nut processing industry. Consequently, developing a nut roasting machine that adapts to the characteristics of nut materials, provides uniform drying, high efficiency, and ensures product quality has become an urgent need in this field. To address this, we propose an air-source heat pump roasting machine to effectively resolve the aforementioned shortcomings. Summary of the Invention

[0005] The purpose of this invention is to provide an air source heat pump baking machine to solve the problems of uneven drying and low drying efficiency of existing baking equipment mentioned in the background art.

[0006] This invention is achieved through the following technical solution: an air source heat pump baking machine, including a transfer table, a conveyor belt on the inner side of the transfer table, and further comprising: A screening mechanism, located on one side of the top of the conveyor table, is used to store and disperse nuts onto the conveyor belt; A baking oven, which is inverted U-shaped and fixedly mounted on a conveyor table; A collection mechanism is provided on the top wall of the oven and is used to collect and absorb dust adhering to the surface of the nuts; A drying mechanism for blowing hot air onto the surface of nuts; The collection mechanism includes a collection box with a filter screen inside. One side of the collection box is connected to the inside of the baking oven through an air inlet pipe. The drying mechanism includes an air source heat pump. The input end of the air source heat pump is connected to the side of the collection box opposite to the air inlet pipe, and the output end of the air source heat pump is connected to the inside of the baking oven. The collection mechanism is also equipped with a locking mechanism, which is detachably connected to the filter screen. When the air source heat pump is in the on state, the locking mechanism holds the filter screen tightly; when the air source heat pump is in the off state, the locking mechanism separates from the filter screen.

[0007] Optionally, the screening mechanism includes a screening hopper, with a screening cylinder rotatably positioned at the center of the hopper. The outer surface of the screening cylinder has screening grooves. The bottom of the screening hopper has a screening chamber, the lower surface of which is inclined downwards and communicates with the outside. A dual-shaft motor is mounted on the outer surface of the screening hopper, with one end of its output shaft coaxially connected to the screening cylinder. A plurality of screening strips are spaced apart on the lower surface of the screening chamber. The lower surfaces of the screening strips are rotatably engaged with the screening chamber via rotating shafts. A movable strip is shared on the upper surfaces of the screening strips, and the upper surface of each screening strip is also rotatably engaged with the movable strip via a rotating shaft.

[0008] Optionally, the outer surface of the screening hopper is further provided with a linkage component, which is used to transmit the output shaft torque of the dual-shaft motor as a driving force for the movable bars to reciprocate along their own length, so as to make several screening bars oscillate back and forth. The top wall of the collection box is provided with an insertion port for the filter screen to pass through, and the inner bottom surface of the collection box is also provided with a stabilizing groove for the filter screen to be embedded. The surface of the filter screen and the inside of the insertion port and the stabilizing groove are provided with a locking slot. The top and bottom walls of the collection box are provided with a contraction cavity at the position opposite to the locking slot. The locking mechanism includes a first piston plate movably disposed in the contraction cavity. The side of the first piston plate facing the locking slot is provided with a locking block, and the side of the first piston plate facing away from the locking slot is connected to the inner wall of the contraction cavity through a first spring. In the natural state, the locking block is not embedded in the locking slot.

[0009] Optionally, the end of the collection mechanism facing away from the air inlet pipe is provided with a communication port connected to the input end of the air source heat pump. The locking mechanism includes two sealing plates that can rotate and open relative to each other. The two sealing plates are disposed in the communication port. The sealing plates and the inner wall of the communication port are connected by a second spring. In the natural state, the free ends of the two sealing plates abut against each other to close the communication port. A crossbar is hinged to the side of the sealing plate facing the filter screen. A pressure plate is provided at the end of the crossbar. An air bladder is provided between the pressure plate and the inner wall of the collection box. The air bladder and the contraction chamber are connected by an air pipe. When the sealing plate unfolds and compresses the air bladder, the first piston plate can push the locking block to embed into the locking slot.

[0010] Optionally, the air source heat pump has an outlet pipe at its output end, the end of which extends into the inside of the baking oven and is equipped with an outlet hood. A sliding groove is formed on the side wall of the baking oven, and a sliding block slides within the groove. One end of the sliding block is fixedly connected to the outlet hood, and the sliding block and the inner end of the sliding groove are connected by a third spring. A drive gear is rotatably mounted on the inner side wall of the baking oven, and toothed grooves are evenly formed on the outer surface of the conveyor belt. The drive gear meshes with the toothed grooves. A driven rod is provided at one end of the outlet hood, and a fixed block is provided on the surface of the drive gear. When the drive gear rotates under the drive of the conveyor belt, the fixed block can repeatedly push the driven rod.

[0011] Optionally, both ends of the bottom surface of the transmission platform are provided with elastic support components. The elastic support components include a storage base and a lifting base elastically connected inside the storage base. The bottom surface of the storage base has rollers, and the top of the lifting base is fixedly connected to the bottom surface of the transmission platform.

[0012] Compared with the prior art, the present invention provides an air source heat pump baking machine, which has the following beneficial effects: 1. This invention uses a conveyor belt to slowly and evenly transport nuts and an air source heat pump to blow hot air for roasting. Compared with traditional electric heating methods, this invention uses a gentle roasting method that helps to slowly heat up and dry the nuts, avoiding the caramelization of sugars in the nuts due to excessively rapid temperature rise, thus helping to improve product quality. 2. The present invention conveys nuts through a screening mechanism, which has screening bars that swing left and right. The screening bars help to evenly distribute the nuts on the conveyor belt, thereby improving the uniformity of drying. 3. The present invention also has a collection mechanism, which allows hot air to circulate back to save energy, while filtering out impurities mixed in with the nuts, further reducing subsequent cleaning work; 4. The collection mechanism in this invention includes a filter screen, and the installation method of the filter screen is linked to the start and stop of the drying mechanism. Specifically, when the drying mechanism is started, the filter screen is fixedly installed, and when the drying mechanism is turned off, the filter screen can be freely pulled out, which facilitates the staff to clean and maintain the filter screen. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the screening mechanism of the present invention; Figure 3 This is a schematic diagram of the linkage component of the present invention; Figure 4 This is a schematic diagram of the first air pressure box structure of the present invention; Figure 5This is a schematic diagram of the second air pressure box structure of the present invention; Figure 6 This is a schematic diagram of the structure of the collection mechanism of the present invention; Figure 7 This is a schematic diagram of the internal structure of the baking oven of the present invention; Figure 8 This is a schematic diagram of the elastic support component structure of the present invention; Figure 9 This is a magnified view of point A in section 6.

[0014] In the diagram: 100, conveyor table; 200, conveyor belt; 201, toothed groove; 300, screening mechanism; 301, screening hopper; 302, screening cylinder; 303, screening trough; 304, screening chamber; 305, dual-shaft motor; 306, screening bar; 307, moving bar; 400, baking oven; 401, sliding groove; 402, sliding block; 403, drive gear; 404, fixed block; 405, driven rod; 500, drying mechanism; 501, air source heat pump; 502, exhaust pipe; 503, exhaust hood; 600, linkage assembly; 601, ... 602. First air pressure box; 603. Second air pressure box; 604. Cam; 605. Vertical rod; 606. Connecting column; 607. Push rod; 700. Collection mechanism; 701. Collection box; 702. Filter screen; 703. Air inlet pipe; 704. Air inlet cover; 705. Contraction chamber; 706. Bayonet; 707. Connecting port; 800. Locking mechanism; 801. First piston plate; 802. Locking block; 803. Sealing plate; 804. Horizontal rod; 805. Pressure plate; 806. Airbag; 900. Elastic support component; 901. Storage seat; 902. Lifting seat. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Example 1: Please refer to Figure 1 - Figure 9This application proposes an air source heat pump baking machine, including a conveyor platform 100, a conveyor belt 200 on the inner side of the conveyor platform 100, a sieving mechanism 300, a baking oven 400, a collecting mechanism 700, and a drying mechanism 500. The sieving mechanism 300 is located on the top side of the conveyor platform 100 and is used to store and disperse nuts onto the conveyor belt 200. Specifically, the sieving mechanism 300 includes a sieving hopper 301, a sieving cylinder 302 rotatably located in the middle of the sieving hopper 301, a sieving groove 303 on the outer surface of the sieving cylinder 302, and a sieving cavity 304 at the bottom of the sieving hopper 301. The lower surface of the sieving cavity 304 is inclined downward and communicates with the outside. Therefore, when the screening cylinder 302 continues to rotate, the screening trough 303 can accommodate some nuts and discharge the nuts into the screening chamber 304. The nuts that enter the screening chamber 304 can roll down under the action of gravity and finally fall onto the upper surface of the conveyor belt 200.

[0017] Furthermore, a dual-shaft motor 305 is provided on the outer surface of the screening hopper 301, and one end of the output shaft of the dual-shaft motor 305 is coaxially connected to the screening cylinder 302. A plurality of screening bars 306 are spaced apart on the lower surface of the screening chamber 304. The lower surface of the screening bars 306 is rotatably engaged with the screening chamber 304 via a rotating shaft. A movable bar 307 is provided on the upper surface of the screening bars 306, and the upper surface of the screening bars 306 is also rotatably engaged with the movable bar 307 via a rotating shaft. The middle position of the lower surface of the screening bars 306 is rotatably connected to the bottom wall of the screening trough 303 via a rotating shaft, and one end of the upper surface of the screening bars 306 is rotatably connected to the movable bar 307 via a rotating shaft. Therefore, when the movable bar 307 moves along its own length, it can drive the screening bars 306 to swing, thereby changing the output direction of the nuts. It should be noted that the height of the screening bars 306 is greater than the diameter of the nuts, and the distance between two adjacent screening bars 306 is approximately the diameter of two nuts.

[0018] As one embodiment and not a limitation, the outer surface of the screening hopper 301 is also provided with a linkage component 600. The linkage component 600 is used to transmit the output shaft torque of the dual-axis motor 305 as a driving force for the movable bar 307 to reciprocate along its own length, so that the screening bars 306 oscillate back and forth. Specifically, the linkage component 600 includes a first pressure box 601 and a second pressure box 602, both of which are fixedly installed on the outer surface of the screening hopper 301. The linkage component 600 also includes a cam 603, which is coaxially connected to the other end of the output shaft of the dual-axis motor 305. The surface of the cam 603 has a cam groove along its own contour direction. The first pressure box 601 has a piston plate inside, one end of which is connected to a vertical rod 604. The top end of the vertical rod 604 has a connecting post 605, which is movably embedded in the cam groove. When the dual-axis motor 305 drives the cam 603 to rotate continuously, the connecting column 605 can move continuously along the cam groove, thereby driving the vertical rod 604 to perform reciprocating lifting and lowering motion.

[0019] The second pressure box 602 also has piston plates inside. The second pressure box 602 is arranged horizontally, and its outer end is connected to the lower end of the first pressure box 601 via a flexible hose. Therefore, when the vertical rod 604 reciprocates, the piston plates inside the second pressure box 602 can be synchronously driven to reciprocate under air pressure. One end of the piston plates inside the second pressure box 602 is also equipped with a push rod 606. This push rod 606 is a flexible rod, such as a rubber rod. One end of the push rod 606 extends into the inner side of the screening hopper 301 and is connected to one end of the movable bar 307. In other words, when the dual-shaft motor 305 is working, the screening cylinder 302 can continuously rotate and continuously discharge nuts into the screening chamber 304. Under the action of the cam 603 and the two pressure boxes, the screening bar 306 can continuously swing left and right, thereby evenly dispersing the nuts on the upper surface of the conveyor belt 200, which is beneficial for subsequent drying.

[0020] In other embodiments of this application, the baking oven 400 is inverted U-shaped and fixedly mounted on the conveyor table 100; the collecting mechanism 700 is disposed on the top wall of the baking oven 400 and used to collect and absorb dust adhering to the surface of the nuts; the drying mechanism 500 is used to blow hot air onto the surface of the nuts; wherein, the collecting mechanism 700 includes a collecting box 701, the inside of the collecting box 701 is provided with a filter screen 702, and one side of the collecting box 701 communicates with the inside of the baking oven 400 through an air inlet pipe 703, and the drying mechanism 500... The oven 400 includes an air source heat pump 501. The input end of the air source heat pump 501 is connected to the side of the collection box 701 opposite to the air inlet pipe 703, and the output end of the air source heat pump 501 is connected to the inside of the oven 400. In other words, the air source heat pump 501 is used to introduce hot air into the oven 400 to dry the nuts, while the air inlet pipe 703 is used to recycle air from inside the oven 400, which is then filtered by the filter screen 702 before being introduced into the air source heat pump 501, forming a circulation. This air circulation not only helps save energy for the air source heat pump 501, allowing it to maintain the hot air temperature at a lower energy consumption level, but the filter screen 702 also prevents dust from being emitted into the external environment and causing pollution, thus helping to maintain the cleanliness of the working area.

[0021] In this embodiment, the collecting mechanism 700 is further provided with a locking mechanism 800, which is detachably connected to the filter screen 702. When the air source heat pump 501 is in the on state, the locking mechanism 800 holds the filter screen 702 tightly; when the air source heat pump 501 is in the off state, the locking mechanism 800 separates from the filter screen 702. That is, the installation state of the filter screen 702 is linked to the start and stop of the air source heat pump 501. In the non-working state, the filter screen 702 is movably installed for easy disassembly and cleaning; when the air source heat pump 501 is in the working state, the filter screen 702 is fixedly installed to maintain stability and prevent air leakage.

[0022] In some other embodiments of this application, the top wall of the collection box 701 is provided with an insertion port for the filter screen 702 to pass through, and the inner bottom surface of the collection box 701 is also provided with a stabilizing groove for the filter screen 702 to be embedded. The surface of the filter screen 702 and the inner side of the insertion port and the stabilizing groove are provided with a locking slot 706. The top wall and bottom wall of the collection box 701 are provided with a contraction cavity 705 at the position opposite to the locking slot 706. At the same time, the top of the filter screen 702 is located above the top wall of the collection box 701 to facilitate the operator to directly insert or remove the filter screen 702.

[0023] The specific structure of the locking mechanism 800 is described in detail below: The locking mechanism 800 includes a first piston plate 801 movably disposed within the contraction cavity 705. A locking block 802 is provided on the side of the first piston plate 801 facing the latch 706, and the side of the first piston plate 801 facing away from the latch 706 is connected to the inner wall of the contraction cavity 705 via a first spring. In its natural state, the locking block 802 is not embedded in the latch 706. That is, without external force, the locking block 802 does not extend out of the contraction cavity 705, and the filter screen 702 can be freely inserted or removed. The collecting mechanism 700 has a connecting port 707 at one end opposite to the air intake pipe 703, which communicates with the input terminal of the air source heat pump 501. The locking mechanism 800 includes two sealing plates 803 that can rotate and open relative to each other. The two sealing plates 803 are disposed in the connecting port 707, and the sealing plates 803 and the inner wall of the connecting port 707 are connected by a second spring. In the natural state, the free ends of the two sealing plates 803 abut against each other to close the connecting port 707. It should be noted that one end of the sealing plate 803 is hinged to the inner wall of the connecting port 707. A horizontal bar 804 is hinged to the side of the sealing plate 803 facing the filter screen 702. A pressure plate 805 is located at the end of the horizontal bar 804. An air bladder 806 is located between the pressure plate 805 and the inner wall of the collection box 701. The air bladder 806 and the contraction chamber 705 are connected by an air pipe. When the sealing plate 803 unfolds and compresses the air bladder 806, the first piston plate 801 can push the locking block 802 into the locking slot 706. Specifically, in this embodiment, there is only one pressure plate 805, meaning the ends of the two horizontal bars 804 are connected to a single pressure plate 805. One side of the air bladder 806 is fixedly connected to the inner wall of the collection box 701, and the other side is fixedly connected to the pressure plate 805. When the sealing plate 803 unfolds outwards, under the action of the horizontal bar 804, the pressure plate 805 compresses the air bladder 806, allowing gas to enter the contraction chamber 705 to compress the locking block 802, causing it to extend and embed into the locking slot 706. In other words, when the air source heat pump 501 is turned on, the sealing plate 803 can unfold under negative pressure, thus fixing the position of the filter screen 702. Conversely, when the air source heat pump 501 is turned off, the sealing plate 803 resets under the reset action of the spring, and the locking block 802 also resets and retracts into the contraction cavity 705, at which time the filter screen 702 can be freely pulled out. Compared with traditional bolt connections or snap-fit ​​methods, in this embodiment, the filter screen 702 is securely installed when the air source heat pump 501 is on, avoiding shaking or edge leakage, while in the off state, the filter screen 702 can be freely pulled out, making it convenient for staff to clean the filter screen 702.

[0024] Meanwhile, when this device operates continuously for a long time, impurities on the filter screen 702 will clog the mesh. At this time, even if the air source heat pump 501 is turned on, the sealing plate 803 cannot be opened. Therefore, the staff can directly pull the filter screen 702 to determine whether the filter screen 702 is completely blocked. If it can be pulled out, it can be considered that the filter screen 702 is completely blocked. Otherwise, it means that there are still enough mesh openings in the filter screen 702 for use.

[0025] As one embodiment and not a limitation, the air source heat pump 501 has an outlet pipe 502 at its output end, and the end of the outlet pipe 502 extends into the inside of the baking oven 400 and is provided with an outlet hood 503. Additionally, the end of the inlet pipe 703 extending into the inside of the baking oven 400 is also provided with an inlet hood 704. The outlet hood 503 has its opening facing downwards, used to blow hot air onto the surface of the nuts and blow away impurities mixed between the nuts. The inlet hood 704 has its opening facing downwards, and the inside of the inlet hood 704 is a negative pressure environment, used to absorb the hot air and impurities into the collection box 701.

[0026] In this embodiment, a sliding groove 401 is provided on the side wall of the baking oven 400, and a sliding block 402 is slidably provided in the sliding groove 401. One end of the sliding block 402 is fixedly connected to the exhaust hood 503, and the sliding block 402 and the inner end of the sliding groove 401 are connected by a third spring. A drive gear 403 is rotatably provided on the inner side wall of the baking oven 400, and toothed grooves 201 are evenly provided on the outer surface of the conveyor belt 200. The drive gear 403 meshes with the toothed grooves 201. One end of the exhaust hood 503 is provided with a driven rod 405, and a fixing block 404 is provided on the surface of the drive gear 403. When the drive gear 403 rotates under the drive of the conveyor belt 200, the fixing block 404 can repeatedly push the driven rod 405. Therefore, under the driving action of the conveyor belt 200, the drive gear 403 can rotate continuously. The fixed block 404 is located near the edge of the drive gear 403. The fixed block 404 repeatedly pushes the driven rod 405, which drives the air hood 503 to make linear reciprocating motion. The function is to expand the blowing range and improve the drying effect.

[0027] In another embodiment of this application, elastic support members 900 are provided at both ends of the bottom surface of the transmission platform 100. Each elastic support member 900 includes a storage base 901 and a lifting base 902 elastically connected inside the storage base 901. The bottom surface of the storage base 901 has rollers, and the top end of the lifting base 902 is fixedly connected to the bottom surface of the transmission platform 100. Therefore, this achieves a buffering and shock-absorbing effect on the transmission platform 100, helping to reduce noise generated by vibration during operation.

[0028] Example 2: This application provides an operating method for an air source heat pump baking machine, applicable to the air source heat pump baking machine described in Example 1 above, including the following steps: The nuts to be roasted are poured into the sieving mechanism 300. After sieving, the nuts gradually fall onto the upper surface of the conveyor belt 200. Specifically, as the sieving cylinder 302 continues to rotate, the nuts gradually fall into the sieving chamber 304. At the same time, the sieving bar 306 swings back and forth, which changes the direction of the nuts' fall so that the nuts can fall evenly onto the conveyor belt 200.

[0029] Once the nuts are inside the baking oven 400, the drying mechanism 500 blows hot air into the baking oven 400 to bake the nuts. Meanwhile, the collection mechanism 700 absorbs air from the baking oven 400 through the air inlet pipe 703 and passes it into the collection box 701. After being filtered by the filter screen 702, the air returns to the drying mechanism 500. This air recycling method helps to save energy consumption of the air source heat pump and keeps the inside of the baking oven 400 at a suitable drying temperature.

[0030] In the non-baking state, clean the filter 702 for future use. It should be noted that when the air source heat pump 501 is turned off, the negative pressure in the collection box 701 disappears, the sealing plate 803 resets under the action of the spring, and the locking block 802 retracts into the shrinkage chamber 705. At this time, the filter 702 can be freely pulled out, making it convenient for staff to clean and maintain it.

[0031] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0032] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air-source heat pump baking machine, comprising a transfer table, wherein a conveyor belt is provided on the inner side of the transfer table, characterized in that, Also includes: A screening mechanism, located on one side of the top of the conveyor table, is used to store and disperse nuts onto the conveyor belt; A baking oven, which is inverted U-shaped and fixedly mounted on a conveyor table; A collection mechanism is provided on the top wall of the oven and is used to collect and absorb dust adhering to the surface of the nuts; A drying mechanism for blowing hot air onto the surface of nuts; The collection mechanism includes a collection box with a filter screen inside. One side of the collection box is connected to the inside of the baking oven through an air inlet pipe. The drying mechanism includes an air source heat pump. The input end of the air source heat pump is connected to the side of the collection box opposite to the air inlet pipe, and the output end of the air source heat pump is connected to the inside of the baking oven. The collection mechanism is also equipped with a locking mechanism, which is detachably connected to the filter screen. When the air source heat pump is in the on state, the locking mechanism holds the filter screen tightly; when the air source heat pump is in the off state, the locking mechanism separates from the filter screen.

2. The air source heat pump baking machine according to claim 1, characterized in that: The screening mechanism includes a screening hopper, a screening cylinder is rotatably provided in the middle of the screening hopper, a screening groove is provided on the outer surface of the screening cylinder, and a screening cavity is provided at the bottom of the screening hopper. The lower surface of the screening cavity is inclined downward and communicates with the outside.

3. The air source heat pump baking machine according to claim 2, characterized in that: The outer surface of the screening hopper is equipped with a dual-shaft motor, one end of the output shaft of the dual-shaft motor is coaxially connected to the screening cylinder; the lower surface of the screening chamber is provided with a number of screening bars at intervals, the lower surface of the screening bars is rotatably engaged with the screening chamber through a rotating shaft, and the upper surface of the number of screening bars is provided with a movable bar, the upper surface of the screening bars is also rotatably engaged with the movable bar through a rotating shaft.

4. The air source heat pump baking machine according to claim 3, characterized in that: The outer surface of the screening hopper is also provided with a linkage component, which is used to transmit the output shaft torque of the dual-axis motor as the driving force for the movable bar to reciprocate along its own length direction, so as to make several screening bars swing back and forth.

5. An air-source heat pump baking machine according to claim 1, characterized in that: The top wall of the collection box has an insertion port for the filter screen to pass through, and the bottom surface of the collection box also has a stabilizing groove for the filter screen to be embedded. The surface of the filter screen and the inside of the insertion port and the stabilizing groove both have a locking slot. The top and bottom walls of the collection box have a contraction cavity at the position opposite the locking slot. The locking mechanism includes a first piston plate movably disposed within the contraction cavity. A locking block is provided on the side of the first piston plate facing the bayonet, and the side of the first piston plate facing away from the bayonet is connected to the inner wall of the contraction cavity via a first spring. In its natural state, the locking block is not embedded in the bayonet.

6. An air-source heat pump baking machine according to claim 5, characterized in that: The collecting mechanism has a communication port connected to the input end of the air source heat pump at one end opposite to the air inlet pipe. The locking mechanism includes two sealing plates that can rotate and open relative to each other. The two sealing plates are set in the communication port. The sealing plates and the inner wall of the communication port are connected by a second spring. In the natural state, the free ends of the two sealing plates abut against each other to close the communication port. The sealing plate is hinged to a crossbar on the side facing the filter screen. A pressure plate is provided at the end of the crossbar. An air bladder is provided between the pressure plate and the inner wall of the collection box. The air bladder and the contraction chamber are connected by an air tube. When the sealing plate unfolds and compresses the air bladder, the first piston plate can push the locking block to embed into the locking slot.

7. An air-source heat pump baking machine according to claim 1, characterized in that: The air source heat pump is equipped with an air outlet pipe at its output end, and the end of the air outlet pipe extends into the inside of the baking oven and is equipped with an air outlet cover.

8. An air-source heat pump baking machine according to claim 7, characterized in that: A sliding groove is provided on the side wall of the baking oven, and a sliding block is slidably provided in the sliding groove. The sliding block is fixedly connected to one end of the air vent, and the sliding block and one end of the sliding groove are connected by a third spring. A drive gear is rotatably mounted on the inner wall of the baking oven. The outer surface of the conveyor belt is evenly provided with toothed grooves. The drive gear meshes with the toothed grooves. One end of the vent hood is provided with a driven rod. The surface of the drive gear is provided with a fixed block. When the drive gear rotates under the drive of the conveyor belt, the fixed block can repeatedly push the driven rod.

9. An air-source heat pump baking machine according to claim 1, characterized in that: The bottom surface of the transmission station is equipped with elastic support components at both ends.

10. An air-source heat pump baking machine according to claim 9, characterized in that: The elastic support component includes a storage base and a lifting base elastically connected inside the storage base. The bottom surface of the storage base has rollers, and the top of the lifting base is fixedly connected to the bottom surface of the transmission table.

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