Stock bin, 3D printing feeding device and 3D printing equipment

Abstract

The utility model discloses a stock bin, a 3D printing feeding device and 3D printing equipment. The stock bin comprises a shell, a base and a heating assembly. The housing encloses the accommodating cavity; the base is accommodated in the accommodating cavity; the base is provided with a containing groove, a heating cavity and an exhaust part, the containing groove is formed in the upper side of the base and used for containing parts of the multiple trays, the bottom wall of at least part of the containing groove is matched with the trays in shape, and the heating cavity and the exhaust part are arranged on the lower side of the base; the heating cavity is further provided with a hot air channel facing the containing groove, and the hot air channel communicates with an air outlet. The exhaust part is arranged on the side deviating from the air supply direction of the air outlet or on the side deviating from the air supply direction of the air outlet, and the exhaust part communicates with the air channel between the containing groove and the heating cavity and / or communicates with the air channel between the containing groove and the exterior of the shell; the heating assembly is contained in the heating cavity and comprises a fan and a heating piece. According to the stock bin, the problem that the gas circulation path in a stock bin of existing 3D printing equipment is short can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of 3D printing, and particularly relates to a material bin, a 3D printing feeding device, and a 3D printing device. Background Art

[0002] A 3D printing device (also known as a three-dimensional printer or a stereolithography printer) constructs a three-dimensional object by layer-by-layer printing. The 3D printing device includes a print head for extruding printing material and a printing platform for depositing the printing material to form a three-dimensional object. The print head is configured to be movable relative to the printing platform and to extrude the printing material onto the surface of the printing platform while moving. The printing material is deposited and fused layer by layer on the surface of the printing platform to print out a three-dimensional object.

[0003] With the development of 3D printing technology, people's demand for the color or variety of materials of printed objects is also getting higher and higher. How to meet the diverse needs of printed objects has gradually become a research hotspot. Summary of the Utility Model

[0004] The purpose of the present application is to provide a material bin, a 3D printing feeding device, and a 3D printing device, so as to solve the problem that the gas circulation path in the material bin of the existing 3D printing device is short.

[0005] To achieve the purpose of the present application, the following technical solutions are provided in the present application:

[0006] In a first aspect, the present application provides a material bin for a 3D printing feeding device, including a housing, a base, and a heating component; the housing encloses a receiving cavity; the base is received in the receiving cavity; the base is provided with a receiving groove, a wire routing groove, and a heating cavity, the receiving groove is formed on the upper side of the base and is used for receiving a part of a plurality of trays, at least a part of the bottom wall of the receiving groove is adapted to the shape of the tray, the heating cavity is arranged on the lower side of the base; at least a part of the wire routing groove is recessed relative to the bottom wall of the receiving groove, and an air outlet is formed on the side wall of the wire routing groove, and the air outlet communicates the heating cavity and the wire routing groove; the heating component is received in the heating cavity, and the heating component includes a blower and a heating element.

[0007] In an embodiment, the base includes a first side and a second side opposite to each other in a first direction, and the wire routing groove extends in a direction of contracting and approaching from the first side to the second side; along the first direction, the air outlet is located at a central position on the side wall of the wire routing groove.

[0008] In an embodiment, one end of the wire routing groove is at a central position in a second direction near the second side, the first direction intersects with the second direction, wherein the tray is disc-shaped, and the second direction is the axial direction of the tray.

[0009] In one embodiment, the base includes at least one boss, the boss is received in the wire groove, the boss extends from the first side to the second side, the boss divides the wire groove into at least two wire sub-grooves spaced apart in the second direction, and the at least two wire sub-grooves are spaced apart near the first side and converge or approach near the second side, and the air outlet is located on the side wall of the outermost wire sub-groove along the second direction.

[0010] In one embodiment, the air outlet includes a first edge and a second edge that are relatively spaced apart, the first edge and the second edge are located at the connection between the air outlet and the side wall of the wire groove, and the included angle α1 between the line A connecting the first edge and the second edge and the projection of the second direction on the bottom wall of the housing ranges from 40° to 70°.

[0011] In one embodiment, the base further includes a deflector, the deflector is disposed at the air outlet, and the included angle α2 between the deflector and the projection of the second direction on the bottom wall of the housing ranges from 40° to 70°.

[0012] In one embodiment, the wire groove includes opposite first side wall and second side wall, one of the first side wall and the second side wall has a first depression, the air outlet is opened at the first depression, the first depression is centrally disposed relative to the bottom wall of the housing, the projection point of the center point of the line A connecting the first edge and the second edge on the bottom wall of the housing is O, the line segment AB of the bottom wall of the housing passing through point O along the first direction, and the line segment CD of the bottom wall of the housing passing through point O along the second direction, OA / AB is between 0.35 - 0.65, and / or, OC / CD is between 0.35 - 0.65.

[0013] In one embodiment, the other of the first side wall and the second side wall has a second depression, the silo further includes a multi-pass member, the multi-pass member is disposed at the intersection of the plurality of wire sub-grooves, each wire sub-groove is used to receive an internal guide tube, and the internal guide tube extends into the multi-pass member, wherein, along the first direction, the first depression and the second depression are closer to the intersection of the wire sub-grooves.

[0014] The present application provides a receiving groove and a heating chamber on the base, and provides a wiring groove on the bottom wall of the receiving groove, and uses the wiring groove to guide the linear material on the material tray accommodated in the receiving groove out of the material silo, making full use of the space at the bottom of the receiving groove for material transportation, thereby realizing the feeding function of the material silo; and, by providing an air outlet on the side wall of the wiring groove to connect to the heating chamber, the airflow provided by the heating chamber can enter the wiring groove, and the airflow diffuses in the wiring groove to heat and dry the linear material in the wiring groove, thereby expanding the distance between the air outlet and the material tray, and facilitating the diffusion of airflow; in addition, since the wiring groove is located at the bottom of the base, the hot air flow will diffuse upward, so that the upward diffused heat flow can cover all the material trays, thereby further achieving the heating and drying effect on the material trays.

[0015] In the second aspect, the present application provides a material silo for a 3D printing feeding device, comprising a shell, a base and a heating component; the shell encloses a receiving cavity; the base is received in the receiving cavity; the base is provided with a receiving groove, a heating cavity and an exhaust portion, the receiving groove is formed on the upper side of the base and is used to receive a plurality of material trays, at least part of the bottom wall of the receiving groove is adapted to the shape of the material tray, the heating cavity and the exhaust portion are arranged on the lower side of the base; the heating cavity is also provided with a hot air channel facing the receiving groove, and the hot air channel is connected to an air outlet; the exhaust portion is provided on a side away from the air supply direction of the air outlet, or on a side deviating from the air supply direction of the air outlet, the exhaust portion connects the air duct between the receiving groove and the heating cavity, and / or the exhaust portion connects the air duct between the receiving groove and the outside of the shell; the heating component is received in the heating cavity, and the heating component includes a fan and a heating element.

[0016] In one embodiment, the base is further provided with a wiring groove, and the base includes a first side and a second side opposite to each other in a first direction, and the wiring groove shrinks and extends from the first side toward the second side.

[0017] In one embodiment, the heating chamber and the exhaust portion are arranged closer to the second side than to the first side, and the wiring groove is located between the heating chamber and the exhaust portion.

[0018] In one embodiment, the air supply direction of the hot air channel is toward the top of the bottom wall of the receiving groove, and the exhaust part includes a connecting cavity and an exhaust port. The connecting cavity is recessed relative to the bottom wall of the receiving groove so that the gas in the receiving groove flows to the connecting cavity. The exhaust port is at least partially toward the bottom of the receiving groove, and the exhaust port connects the connecting cavity and the gap between the base and the shell.

[0019] In one embodiment, the silo also includes an air valve, an air outlet is opened on the outer shell, an air flow channel is formed between the air outlet and the receiving groove, the air valve is arranged on the air flow channel, and is used to control the conduction or closing of the air flow channel, the receiving groove is located on the upper side of the base, and the air flow channel is located on the lower side of the base.

[0020] In one embodiment, the outer shell is a hexahedral structure, and the outer shell includes a shell bottom plate and a shell side plate connected to each other, the shell side plate is annular and surrounds the outer periphery of the base, and the air outlet is opened on the shell side plate; the air valve is arranged on the side wall of the connecting cavity, or the air valve is arranged in the side wall of the shell side plate facing the connecting cavity; along the direction of the line connecting the exhaust port and the air outlet, the distance between the side wall of the connecting cavity and the shell side plate is 30mm to 50mm.

[0021] In one embodiment, the air inlet surface of the fan faces away from the bottom wall of the receiving groove; the line B connecting the center point of the fan blade and the center point of the air outlet, and the line C connecting the center point of the fan blade and the center point of the exhaust outlet have an angle β1 on the shell bottom plate, and the angle β1 is 20°~50°.

[0022] In one embodiment, the air inlet surface of the fan faces away from the bottom wall of the receiving groove; the line B connecting the center point of the fan blade and the center point of the air outlet, and the line K connecting the center point of the fan blade and the center point of the air outlet have an angle β2 on the shell bottom plate, and the angle β2 is 25°~55°.

[0023] In one embodiment, the heating chamber is further provided with a hot air channel facing the receiving groove, the hot air channel is connected to the air outlet, and the air supply direction of the hot air channel is toward the top of the bottom wall of the receiving groove.

[0024] The present application forms a hot air channel on the base, and the exhaust part is arranged on the side away from the air supply direction of the hot air channel, or on the side deviated from the air supply direction of the hot air channel, that is, the exhaust part is arranged at a position away from the hot air channel, and the (hot) air flow discharged from the hot air channel will not pass directly through the exhaust part, but will first heat the drying tray in the receiving tank. When the air pressure in the receiving tank is too high, part of the air flow will be released through the exhaust part under the action of the pressure difference, thereby realizing gas circulation. The air flow path in this process is larger, so the material on the tray can be dried more perfectly.

[0025] In a third aspect, the present application provides a silo for a 3D printing feeding device, which includes a housing, a base, and a heating assembly; the housing encloses a receiving cavity; the base is received in the receiving cavity; the base is provided with a receiving groove and a heating cavity, the receiving groove is formed on the upper side of the base and is used for receiving parts of a plurality of trays, at least part of the bottom wall of the receiving groove is adapted to the shape of the tray, and the heating cavity is arranged on the lower side of the base; the heating assembly is received in the heating cavity, and the heating assembly includes a blower and a heating element; a return air port is further provided on a surface of the base facing away from the tray, and the return air port communicates with the heating cavity; there is a gap between the base and the housing, and / or, the base is provided with pores, and the pores are used for guiding the air flow between the return air port and the receiving groove.

[0026] In one embodiment, the heating cavity is further communicated with an air outlet, and the area of the air outlet is larger than the opening area of any one of the pores, and / or, the area of the return air port is larger than the opening area of any one of the pores.

[0027] In one embodiment, an air outlet hole is provided on the housing, and an exhaust port is provided on the base, and a space between the air outlet hole and the exhaust port forms an air flow channel, and the return air port communicates with the heating cavity and the air flow channel; the blower enters the air through the return air port from the pores through the air flow channel.

[0028] In one embodiment, the distance between the blower and the air outlet is less than the distance between the return air port and the exhaust port.

[0029] In one embodiment, an air inlet hole is further provided on the housing, and a space between the air inlet hole and the return air port forms an air inlet channel, and the air inlet channel is used for the blower to intake air from outside the silo, and an air inlet valve for controlling the opening or closing of the air inlet channel is further provided on the air inlet channel; the distance between the center point of the air inlet hole and the center point of the return air port is 30 mm to 50 mm, and the air inlet valve is arranged on the side wall of the heating cavity, or, the air inlet valve is arranged on the bottom plate of the housing or the inner wall of the side plate of the housing facing the heating cavity.

[0030] In one embodiment, a connecting line C between the center point of the air inlet hole and the center point of the air outlet, and a connecting line L between the center point of the air inlet hole and the center point of the air outlet hole have an included angle γ in the orthographic projection on the bottom plate of the housing, and the included angle γ is 20° to 55°.

[0031] In one embodiment, the base further includes a partition cover, the partition cover is arranged at the return air port, the partition cover and the base jointly enclose the heating cavity, and the partition cover is provided with air permeable holes, and the air permeable holes are oppositely arranged with the blades of the blower.

[0032] In one embodiment, the outer shell has a hexahedron structure. The outer shell includes a shell bottom plate and shell side plates connected to each other. The shell side plates are annular and surround the outer periphery of the base. The base includes opposite first and second sides in a first direction. The distance from the middle of the receiving groove to the shell bottom plate is less than the distances from the first side and the second side to the shell bottom plate.

[0033] In this application, the air return opening communicating with the heating cavity is arranged below the base, that is, below the bottom wall of the receiving groove. On the one hand, a low-pressure environment is created at the bottom of the base by the air return opening, so that the gas located above and on the side flows downward, thereby further improving the large air circulation in the silo. On the other hand, most of the gas at the bottom of the base is low-temperature gas. By pumping the low-temperature gas into the heating cavity for heating, the heating efficiency of the heating cavity is improved, and heat waste is avoided. On the third hand, the moisture content of the gas at the bottom of the base is relatively high, so that the gas with a high moisture content can enter the heating cavity through the air return opening at the bottom, reducing the retention of the air with a high moisture content below the partition plate, thereby reducing or avoiding condensation.

[0034] Fourthly, this application provides a silo for a 3D printing feeding device, including an outer shell, a base, and a heating assembly; the outer shell encloses a receiving cavity; the base is received in the receiving cavity; the base is provided with a receiving groove, a heating cavity, and an exhaust part. The receiving groove is formed on the upper side of the base and is used for receiving parts of a plurality of trays. At least part of the bottom wall of the receiving groove is adapted to the shape of the tray. The heating cavity and the exhaust part are arranged on the lower side of the base; the exhaust part includes a communicating cavity and an exhaust port. The communicating cavity is recessed relative to the bottom wall of the receiving groove so that the gas in the receiving groove flows to the communicating cavity. At least part of the exhaust port faces downward the bottom wall of the receiving groove. There is an air duct between the heating cavity and the communicating cavity. The air duct communicates the heating cavity and the communicating cavity. The base separates the air duct and the receiving groove; the heating assembly is received in the heating cavity, and the heating assembly includes a fan and a heating element.

[0035] In one embodiment, the base includes a first wall plate, and the two opposite sides of the first wall plate are the heating cavity and the communicating cavity respectively.

[0036] In one embodiment, the base includes a second wall plate, and the second wall plate is arranged opposite to the first wall plate. The side of the first wall plate facing away from the second wall plate is the heating cavity, and the side of the second wall plate facing away from the first wall plate is the communicating cavity. A second hole is opened on the second wall plate, and the second hole communicates with the air duct.

[0037] In one embodiment, the base includes a connecting portion that encloses the air duct, and two opposite ends of the connecting portion are respectively connected to the first wall plate and the second wall plate.

[0038] In one embodiment, the silo includes a first air duct that encloses to form the air duct, and two opposite ends of the first air duct are respectively connected to the first wall plate and the second wall plate.

[0039] In one embodiment, a control valve is provided on the air duct path, and the control valve controls the gas in the air duct to flow from the heating chamber to the communication chamber.

[0040] In one embodiment, the silo further includes a second air duct. One end of the second air duct communicates with the heating chamber, and the second air duct extends under the base and is used to transfer the gas in the heating chamber to the receiving chamber.

[0041] In one embodiment, the heating element includes a plurality of heating fins arranged at intervals in sequence. The plurality of heating fins all extend in the second direction, and the second direction is the extending direction of the air duct.

[0042] In the present application, a directly-connected air duct is provided between the communication chamber and the heating chamber, so that part of the hot air blown out of the heating chamber can directly enter the communication chamber, avoiding the situation that the dispersed air flow in the receiving groove is cooled and the desiccant cannot be activated. The hot air flow directly connected to the communication chamber can increase the temperature in the desiccant tank, thereby reactivating the desiccant, and thus ensuring the drying efficiency of the desiccant.

[0043] In a fifth aspect, the present application provides a silo for a 3D printing feeding device. The silo includes a housing, a base, and a driving unit. The base is installed in the housing. The driving unit includes a driving member and a driving driving wheel. The driving member includes a driving portion and a driving shaft. The driving portion drives the driving driving wheel to rotate through the driving shaft, so that the driving driving wheel drives the material to be conveyed or retracted. The driving member is installed between the base and the housing. Along the axial direction of the driving portion, an air flow channel is formed between the base and the housing.

[0044] Combined with the first aspect, in a possible implementation manner, the base is formed with a receiving groove and an exhaust portion. The receiving groove is formed on the upper side of the base. The exhaust portion communicates with the receiving groove. The exhaust portion includes a communication chamber and an exhaust port. The communication chamber is recessed relative to the bottom wall of the receiving groove. An air outlet hole is formed on the housing, and the space between the air outlet hole and the exhaust port forms the air flow channel.

[0045] In combination with the first aspect, in a possible implementation, the driving member further includes a shell and heat dissipation fins, the shell accommodates the driving part, and the heat dissipation fins are arranged outside the shell, or the driving member further includes a shell provided with heat dissipation fins, the shell accommodates the driving part, and the heat dissipation fins are located on the outer peripheral side of the shell.

[0046] In combination with the first aspect, in a possible implementation, there are multiple heat dissipation fins, the multiple heat dissipation fins are arranged at intervals, and two adjacent heat dissipation fins form a heat dissipation channel.

[0047] In combination with the first aspect, in a possible implementation, the silo also includes a multi-pass piece, which is installed on the base, and the base is provided with a heating chamber, and the heating chamber is arranged on the lower side of the base, and the connecting chamber and the heating chamber are located on opposite sides of the multi-pass piece; the active driving wheel is installed on the multi-pass piece, and the driving part and the heat dissipating fins are located on the side of the multi-pass piece facing the connecting chamber.

[0048] In combination with the first aspect, in one possible implementation, the driving portion is directly connected to the driving shaft, and the active driving wheel is mounted on the driving shaft; the driving unit further includes a fan blade, which is transmission-connected to the driving shaft; the fan blade is located between the driving portion and the active driving wheel; or, the fan blade is located on the side of the active driving wheel facing away from the driving portion.

[0049] In combination with the first aspect, in a possible implementation, the drive unit further includes a cleaning piece, which is transmission-connected to the drive shaft, and the cleaning piece cooperates with the outer peripheral surface of the active drive wheel to scrape off material debris on the active drive wheel under the drive of the drive unit.

[0050] In combination with the first aspect, in a possible implementation, the driving unit further includes a driven driving wheel and a pressing member, the driven driving wheel being installed in the multi-pass member, the driven driving wheel and the active driving wheel being located on opposite sides of the material, so that the material is clamped by the driven driving wheel and the active driving wheel for transport or retraction; the pressing member is connected to the driven driving wheel, the pressing member is exposed relative to the side of the base facing the outside of the silo, and the pressing member is used to drive the driven driving wheel to compress or release the material.

[0051] In combination with the first aspect, in a possible implementation, the multi-way component includes a rotating shaft, a connecting rod structure, and a return spring. The rotating shaft is hinged to the connecting rod structure, the rotating shaft penetrates through the connecting rod structure, the driven driving wheel is connected to the connecting rod structure, the connecting rod structure is configured to drive the driven driving wheel to approach or move away from the driving driving wheel, and the return spring connects the pressing member and the connecting rod structure.

[0052] In the present application, along the axial direction of the driving part, an air flow channel is formed between the base and the housing. In this way, the heat generated by the driving part can be dissipated through heat exchange with the air in the air flow channel, reducing the situation where heat is conducted to the driving driving wheel through the driving shaft, thereby reducing the influence of the heat generated by the driving part on the material and reducing or avoiding the situation of material softening or slipping.

[0053] In a sixth aspect, the present application provides a bin, which includes a housing, a base, and a wind valve. The housing encloses a receiving cavity, the base is received in the receiving cavity of the housing, there is a spaced area between the lower side of the base and at least a part of the housing, and the wind valve is installed in the spaced area to conduct or close the air flow channel between the outside of the housing and the receiving cavity.

[0054] In one implementation, the base is provided with a mounting plate opposite to at least a part of the housing, the wind valve is installed on the mounting plate, and the width range of the gap between the mounting plate and the side plate of the housing is [30 mm, 50 mm].

[0055] In one implementation, the wind valve includes a baffle, a base, and a swing arm connected and arranged. An air flow passage is formed between the base and the baffle, and the swing of the swing arm is used to drive the baffle to move relative to the base to conduct or close the air flow passage.

[0056] In one implementation, the baffle is provided with a first communication hole; the base is provided with a second communication hole, the baffle is connected to the base, the swing arm is rotatably connected to the base, and the rotation of the swing arm drives the baffle to move relative to the base, so that the first communication hole, the second communication hole, and the air flow passage are conducted.

[0057] In one implementation, the wind valve further includes a bottom plate, the bottom plate covers the base, the baffle is located between the bottom plate and the base, the bottom plate is provided with a third communication hole, and the first communication hole, the second communication hole, the third communication hole, and the air flow passage can be conducted.

[0058] In one implementation, a flange is provided on the side of the bottom plate facing away from the baffle, the flange surrounds the third communication hole, and the wind valve further includes a sealing ring, and the sealing ring is sleeved outside the flange.

[0059] In one embodiment, the flange extends radially outward along the flange to form a buckle, and the buckle is used to hold the sealing ring.

[0060] In one embodiment, the flange and the sealing ring are inserted through one of the base and the housing, and the base is installed on the other of the base and the housing.

[0061] In one embodiment, the baffle is provided with a first communication hole, and the base is provided with an exhaust port. Along the stacking direction of the baffle and the base, when the overlapping area of the projection of the baffle and the first communication hole is greater than 0, the baffle opens the exhaust port, and the air flow passage is communicated with the exhaust port. Along the stacking direction of the baffle and the base, when the overlapping area of the projection of the exhaust port on the baffle and the first communication hole is equal to 0, the baffle closes the exhaust port.

[0062] In one embodiment, the silo further includes a cover body, the cover body is rotatably connected to the housing, and the cover body is sealingly connected to the opening end face of the housing.

[0063] For the silo, 3D printing feeding device, and 3D printing equipment provided by the present application, since the air valve can conduct or close the air flow passage between the outside of the housing and the accommodation cavity, so as to discharge the moisture in the accommodation cavity to the outside of the silo. In this way, the moisture in the silo is reduced, the dryness of the material is improved, and the influence of moisture on the components or structures in the silo is reduced. In addition, since the air valve is arranged in the spaced area, that is, the air valve is arranged in the sandwich layer between the housing and the base, the space of the silo can be saved, and the condensation of moisture in the air flow passage can be avoided or reduced. Moreover, the air valve is arranged between the two layers of the base and the housing, so that the air valve is not easily collided by the material tray and damaged, which is beneficial to extending the service life and reliability of the air valve.

[0064] In a seventh aspect, the present application provides an air valve, which includes a baffle, a base, and a swing arm connected and arranged. An air flow passage is formed between the base and the baffle, and the swing of the swing arm is used to drive the baffle to move relative to the base to conduct or close the air flow passage.

[0065] In one embodiment, the baffle is provided with a first sliding groove, the swing arm is slidably connected to the first sliding groove, and the length range of the first sliding groove is [3.5 mm, 6 mm].

[0066] In one embodiment, the swing angle range of the swing arm relative to the 0° axis is [-35°, 45°], and the 0° axis is parallel to the extension direction of the first sliding groove.

[0067] In one embodiment, the rocker arm includes a connecting portion, an arm body and an anti-drop buckle, the connecting portion and the anti-drop buckle are arranged at opposite ends of the arm body to form a rocker arm, the baffle is located between the anti-drop buckle and the arm body, and the maximum width of the anti-drop buckle is greater than the maximum width of the first slide groove.

[0068] In one embodiment, the baffle is provided with a first sliding portion, and the base is provided with a second sliding portion on a side opposite to the baffle, the first sliding portion and the second sliding portion are slidably connected, one of the first sliding portion and the second sliding portion is a second slide groove, and the other of the first sliding portion and the second sliding portion is a protrusion, and the protrusion is passed through the second slide groove and can slide along the second slide groove.

[0069] In one embodiment, the baffle is provided with a first connecting hole, and the baffle also includes a first edge, a second edge, a third edge and a fourth edge connected end to end, the first edge is arranged opposite to the third edge, the second edge is arranged opposite to the fourth edge, and the first sliding portion is provided between the first edge and the first connecting hole; the first sliding portion is provided between the third edge and the first connecting hole, and the first sliding groove is provided between the first connecting hole and the second edge.

[0070] In one embodiment, the baffle is provided with a first communicating hole, and in the extending direction of the first sliding portion, the center of the first communicating hole is eccentrically arranged relative to the center of the baffle.

[0071] In one embodiment, a convex rib is provided on a side of the baffle facing the base or a side of the base facing the baffle, and an extending direction of the second chute is the same as an extending direction of the convex rib.

[0072] In one embodiment, the baffle is rotatably connected to the base, and a convex rib is provided on a side of the baffle facing the base or a side of the base facing the baffle.

[0073] In one embodiment, the height range of the rib is (0, 0.5 mm).

[0074] In one embodiment, one of the side of the baffle facing the base and the side of the base facing the baffle is provided with the rib, and the other of the side of the baffle facing the base and the side of the base facing the baffle includes a plane, and the plane is in contact with the rib.

[0075] In one embodiment, the baffle is provided with a first communication hole; the base is provided with a second communication hole, the baffle is connected to the base, the swing arm is rotatably connected to the base, and the rotation of the swing arm drives the baffle to move relative to the base, so that the first communication hole, the second communication hole, and the air flow passage are conducted.

[0076] In one embodiment, the air valve further includes a bottom plate, the bottom plate covers the base, the baffle is located between the bottom plate and the base, the bottom plate is provided with a third communication hole, and the first communication hole, the second communication hole, the third communication hole, and the air flow passage can be conducted.

[0077] In one embodiment, a flange is provided on a surface of the bottom plate facing away from the baffle, the flange surrounds the third communication hole, and the air valve further includes a sealing ring, and the sealing ring is sleeved outside the flange.

[0078] In one embodiment, the flange extends radially outward along the flange to form a buckle, and the buckle is used to hold the sealing ring.

[0079] In one embodiment, when the baffle closes the air flow passage, the shortest distance range between the edge of the second communication hole and the edge of the first communication hole is [1 mm, 10 mm].

[0080] In one embodiment, the first communication hole is a circular hole, and the aspect ratio of the baffle ranges from [1.4 - 1.9]; the shortest distance range between the edge of the first communication hole and the edge of the baffle is [1.5 mm, 5 mm].

[0081] In one embodiment, the ratio range of the area of the first communication hole to the area of the baffle is [0.06, 0.3].

[0082] In one embodiment, the air valve further includes an electromagnet and a permanent magnet, one of the electromagnet and the permanent magnet is arranged on the base, and the other of the electromagnet and the permanent magnet is arranged on the swing arm. The electromagnet is used to be energized to interact with the permanent magnet, so as to drive the swing arm to drive the baffle to move.

[0083] In one embodiment, the electromagnet includes a soft magnetic yoke structure and a coil, the soft magnetic yoke structure is fixed on the base, and the coil is wound on the soft magnetic yoke structure. One end of the swing arm is fixed to the permanent magnet to rotate relative to the base, and the other end of the swing arm is connected to the baffle.

[0084] In one embodiment, the embodiment of the present application further provides a silo, which includes a housing, a base, and a air valve according to the seventh aspect. The base is received in the housing, and the air valve is installed on at least one of the base and the housing. The air valve is used to open or close the air flow channel between the outside of the housing and the receiving cavity.

[0085] In one embodiment, the air valve further includes a bottom plate, the bottom plate covers the base, the baffle is located between the bottom plate and the base, and the bottom plate and the base are hermetically connected to the housing and the base.

[0086] For the air valve, silo, 3D printing feeding device, and 3D printing equipment provided by the present application, since the air valve can open or close the air flow channel of the silo to discharge the moisture in the silo to the outside of the silo, in this way, the moisture in the silo is reduced, the dryness of the material is improved, and the influence of moisture on the components or structures in the silo is reduced.

[0087] In an eighth aspect, the present application further provides a 3D printing feeding device, which includes a tray and the silo described in the above embodiments. The receiving groove is used to receive the tray, and the tray is used to carry the material.

[0088] In a ninth aspect, the present application further provides a 3D printing equipment, which includes a 3D printer and the 3D printing feeding device described in the eighth aspect. Description of the Drawings

[0089] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0090] Figure 1 is an external view of a silo in one embodiment;

[0091] Figure 2 is an external view of a housing in one embodiment;

[0092] Figure 3 is a front view and a top view of a base in one embodiment;

[0093] Figure 4 is an external view of a base in one embodiment;

[0094] Figure 5A is Figure 3 an enlarged view of the part indicated by the dashed circle in

[0095] Figure 5B is an enlarged view of the deflector of one embodiment;

[0096] Figure 6 is a sectional view of the silo of one embodiment;

[0097] Figure 7 is a top view of the base of another embodiment;

[0098] Figure 8 is a schematic diagram of the air duct between the heating chamber and the communication chamber of one embodiment;

[0099] Figure 9 is a rear external view of the housing of one embodiment;

[0100] Figure 10 is a rear external view of the base of one embodiment;

[0101] Figure 11 is a rear external view of the housing from another perspective;

[0102] Figure 12 is an external view of the drive unit of one embodiment;

[0103] Figure 13 is an external view of the drive unit of another embodiment;

[0104] Figure 14 is a side view of the drive unit of one embodiment;

[0105] Figure 15 is an external view of the air valve of one embodiment;

[0106] Figure 16 is an exploded view A of the air valve of one embodiment;

[0107] Figure 17 is an exploded view B of the air valve of one embodiment.

[0108] Explanation of reference numerals:

[0109] 100- silo, 101- shell, 102- cover, 103- base, 104- heating component, 105- air valve, 107- multi-pass component, 108- receiving chamber, 109- fan, 110- heating element, 111- receiving slot, 112- wiring slot, 113- heating chamber, 114- air outlet, 115- boss, 116- first side, 117- second side, 118- wiring sub-slot, 119- first edge, 120- second edge, 121- connecting chamber, 122- connecting part, 124- shell bottom plate, 125- shell side Plate, 126-pore, 127-guide plate, 128-exhaust part, 129-hot air channel, 130-exhaust port, 131-air outlet, 132-return air port, 133-first slit, 134-second slit, 135-separator cover, 136-air vent, 137-air duct, 138-first wall plate, 139-first hole, 140-second wall plate, 141-second hole, 142-first air duct, 143-control valve, 144-second air duct, 145-main second air duct, 146-second second air duct, 147-air inlet;

[0110] 300 - drive unit, 301 - drive member, 302 - active drive wheel, 303 - driven drive wheel, 304 - housing, 305 - drive part, 306 - drive shaft, 307 - air flow channel, 308 - heat dissipation fins, 309 - heat dissipation channel, 310 - fan blades, 311 - driving gear, 312 - rotating shaft, 313 - acceleration gear, 314 - cleaning member, 315 - feed port, 316 - discharge port, 317 - pressing member, 318 - rotating shaft, 319 - connecting rod structure, 320 - return spring;

[0111] 511 - swing arm; 5111 - arm body; 5113 - connecting part; 5115 - anti-drop buckle; 513 - baffle; 5131 - first slide groove; 5132 - first connecting hole; 5133 - first sliding part; 5134 - first edge; 5135 - second edge; 5136 - third edge; 5137 - fourth edge; 515 - base; 5151 - second connecting hole; 5153 - second sliding part; 5155 - rib; 517 - bottom plate; 5171 - third connecting hole; 5173 - flange; 5175 - buckle; 518 - electromagnet; 519 - permanent magnet; 520 - sealing ring;

[0112] X-first direction, Y-second direction, Z-third direction. DETAILED DESCRIPTION

[0113] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0114] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time.

[0115] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the present application in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the present application includes any and all combinations of one or more of the related listed items.

[0116] The following will describe in detail some embodiments of the present application with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0117] The present application provides a silo 100. Please refer to Figure 1 , which is used for a 3D printing feeding device. The silo 100 is used to store trays. In a specific embodiment, multiple trays can be placed in the silo 100 provided in the present application, and the silo 100 can selectively output the material on one of the trays. Optionally, the tray is disk-shaped, and the tray includes a tray body and a linear material (hereinafter referred to as the material) wound around the tray body. The material is wound around the tray body in circles. When it is necessary to output the material, the silo 100 drives the tray to rotate so that the rotation of the tray body drives the material to be released from the tray body.

[0118] In one embodiment, please refer to Figures 1 to 3, the silo 100 includes a housing 101, a cover 102, a base 103, and a heating assembly 104. The housing 101 encloses a receiving cavity 108; the base 103 is received in the receiving cavity 108; the base 103 is provided with a receiving groove 111, a wire groove 112, and a heating cavity 113. The receiving groove 111 is formed on the upper side of the base and is used to receive parts of a plurality of trays. At least the bottom wall of part of the receiving groove is adapted to the shape of the tray. The heating cavity 113 is provided on the lower side of the base 103; at least part of the wire groove 112 is recessed relative to the bottom wall of the receiving groove 111, and an air outlet 114 is provided on the side wall of the wire groove 112. The air outlet 114 communicates the heating cavity 113 and the wire groove 112; the heating assembly 104 is received in the heating cavity 113, and the heating assembly 104 includes a blower 109 and a heating element 110.

[0119] In a specific embodiment, please refer to Figure 1 , as shown in the figure, the housing 101 includes a first direction X, a second direction Y, and a third direction Z. Among them, the first direction X is the length direction of the housing 101, the second direction Y is the width direction of the housing 101, and the third direction Z is the height direction of the housing 101. It should be noted that the second direction Y is also the axial direction after the tray is placed. Of course, the above three directions are also applicable to describe the base 103. The base 103 includes a front surface and a back surface. Among them, when the silo 100 is placed on a working surface, the back surface of the base 103 faces the working surface, and the front surface faces away from the working surface; optionally, the working surface of the 3D printing feeding device can be a desktop or the ground.

[0120] In one implementation, please refer to Figure 2 , the cover 102 is rotatably connected to the housing 101, and the cover 102 is sealingly connected to the opening end surface of the housing 101. The cover 102 is opened so that the opening of the housing 101 is exposed, and the tray is placed in the receiving cavity 108 through the opening, and the tray is placed on the base 103. The cover 102 is closed so that the receiving cavity 108 is closed, and the tray exports the material through the perforation on the housing 101.

[0121] In one implementation, please refer to Figure 3 , in one implementation, the base 103 is an integrally formed structure, and the manufacturing and forming methods thereof include, but are not limited to, injection molding, compression molding, 3D printing, etc. It can be understood that the base 103 is a large integrally formed part. The base 103 is composed of some horizontal / vertical ribs and partitions. Part of the horizontal / vertical ribs or partitions are connected to the inner wall of the housing 101, and part of the horizontal / vertical ribs or partitions are connected to each other. Therefore, the spaces in the base 103 are all obtained by dividing the receiving cavity 108 through the horizontal / vertical ribs or partitions.

[0122] In one implementation, the base is composed of multiple parts, and some horizontal / vertical ribs and partitions are formed by combining these multiple parts. Some of the horizontal / vertical ribs or partitions are connected to the inner wall of the housing 101, and some of the horizontal / vertical ribs or partitions are connected to each other. The base 103 divides the accommodation cavity 108 through the horizontal / vertical ribs or partitions to obtain different space partitions.

[0123] In one implementation, please refer to Figure 3 , the heating assembly 104 includes a blower 109 and a heating element 110. Among them, the blower 109 is used to create a circulating airflow environment in the accommodation cavity 108, and the heating element 110 is used to heat the gas in the accommodation cavity 108 so that the air in the accommodation cavity 108 forms a hot air flow. In a specific implementation, the blower 109 can inhale the gas at some positions in the accommodation cavity 108 and then blow it out to other positions to create an internal air circulation; in one implementation, according to needs, the blower 109 can draw external gas into the accommodation cavity 108, so as to accelerate the air circulation. In another implementation, the blower 109 can be used to discharge the high-moisture air in the accommodation cavity 108 from the bin, so that the accommodation cavity has a dry environment.

[0124] In the feeding device of the existing 3D printing equipment, the feeding device only has the function of storing the feeding tray. However, due to the high requirements of 3D printing for the dryness of the material, most of the existing feeding devices cannot provide the function of drying the material, resulting in poor quality of the products printed by the 3D printing equipment in the prior art.

[0125] In order to ensure that the feeding device has a good drying effect and remains dry for a long time, a large number of seals are often set in the feeding device to reduce the intrusion of external moist air. Setting the seals will make the structure of the feeding device complex and increase the cost. Therefore, how to make the equipment layout as compact as possible under the premise of meeting the feeding and drying functions, so as to reduce its volume has become a key technical problem. To solve the above problems, it is necessary to comprehensively consider the air flow path and the layout of each functional component, design each functional component and structural shape in the feeding device, so as to make full use of the bin space and achieve the goal of uniform air distribution and efficient dehumidification. If the air flow layout is not reasonably considered, it will result in local heating of the material all the time, and there will still be some parts of the material that are not dried.

[0126] In one implementation, please refer to Figure 3 and Figure 4, along the third direction Z, a receiving groove 111 is formed above the base 103. The receiving groove 111 is used to receive a part of the tray. The tray is placed in the receiving groove 111, specifically on the front side of the base 103, that is, in the third direction Z, the tray is located above the bottom wall of the receiving groove 111. It should be noted that the receiving groove 111 is for receiving a circular tray, so the receiving groove 111 is an arc-shaped groove formed by recessing downward from the front side of the base 103. By setting the base to have an arc-shaped part adapted to the disc shape of the tray.

[0127] In a specific embodiment, the base 103 as a whole presents a posture of being lower in the middle and higher at both sides, that is, along the first direction X, the two ends of the base 103 are higher than the middle part of the base 103. With such a setting, the base 103 can adapt to the shape of the tray and separate the material bin, thereby forming a more reasonable layout and making full use of the space in the material bin. Moreover, the arc-shaped receiving groove 111 of the base 103 is for cooperating with the cover body 102 in the above-mentioned embodiment. In one embodiment, the cover body 102 is also set to be arc-shaped. In this way, the arc-shaped receiving groove 111 of the base 103 and the arc-shaped cover body 102 can enclose a receiving space adapted to the circular tray. By setting the cover body 102 and the base 103 in a copy shape, the unnecessary volume in the material bin can be reduced, thereby reducing the air volume in the material bin, which is beneficial to quickly drying the material bin and reducing the absolute moisture content in the air in the material bin.

[0128] Please refer to Figure 3 and Figure 4 , the bottom wall of the receiving groove 111 is recessed downward (in the third direction Z) to form a wire routing groove 112, that is, the wire routing groove 112 is recessed relative to the bottom wall of the receiving groove 111. The material in the tray extends along the wire routing groove 112 under the constraint of the wire routing groove 112. When the base 103 is placed on the working surface, the bottom wall of the wire routing groove 112 and the bottom wall of the receiving groove 111 are not at the same horizontal height. In a specific embodiment, the tray includes a tray body and a linear material wound around the tray body. The tray is placed in the receiving groove 111, and the radial direction of the tray is the third direction Z. One end of the linear material extends into the wire routing groove 112, and the linear material feeds along the extending direction of the wire routing groove 112. In this way, the material pipe or wire material arranged in the wire routing groove will not interfere with the tray, and after the cover body is opened, the material pipe or multi-way part in the wire routing groove can be operated from the front, and maintenance or operation can be carried out without removing the outer shell or the base, improving the convenience of use.

[0129] In a specific embodiment, the extending direction of the wire routing groove 112 is adapted to the winding direction of the linear material on the tray body. After the tray is placed on the base 103, the radial direction of the tray is the third direction Z, and the tray rolls axially in the second direction Y to make the linear material start to feed, so the linear material can feed along the first direction X to pass out of the material bin 100. Therefore, the extending direction of the wire routing groove 112 is the first direction X.

[0130] In one embodiment, please refer to Figures 3 to 5A , the heating chamber 113 is disposed inside the base 103. The heating assembly 104 is placed in the heating chamber 113. The heating assembly 104 is used to provide hot air so that hot air can be blown out from the heating chamber 113. An air outlet 114 is formed in the side wall of the wire slot 112. The air outlet 114 communicates the heating chamber 113 and the wire slot 112. The heating chamber 113 and the wire slot 112 are separated by the side wall of the wire slot 112 to form two independent spaces; that is, the two opposite sides of the side wall of the wire slot 112 are the wire slot 112 and the heating chamber 113 respectively. Since the air outlet 114 is formed in the side wall of the wire slot 112, the air outlet 114 can communicate the heating chamber 113 and the wire slot 112, and the hot air generated in the heating chamber 113 can flow into the wire slot 112 through the air outlet 114. Specifically, the wire slot 112 can direct the hot air flow in the heating chamber to the middle area of the base. After the hot air flow blows out from the middle of the base, it diffuses upward. After encountering the cover body, it further diffuses to the periphery of the material bin. In this way, the hot air flow in the material bin can be evenly diffused and distributed in the material bin as much as possible, so that the materials in each area can be dried at approximately the same rate, thereby improving the overall drying efficiency.

[0131] It can be understood that the front surface of the base 103 is recessed downward to form a receiving groove 111, and the back surface of the base 103 is recessed toward the material tray to form a heating chamber 113. Therefore, the top wall of the heating chamber 113 is the bottom wall of the receiving groove 111. At the same time, the wire slot 112 is further recessed on the bottom wall of the receiving groove 111, so that the side wall of the wire slot 112 is also the side wall of the heating chamber 113. By injection molding the base 103 in a preset shape and obtaining the integrated receiving groove 111, heating chamber 113 and wire slot 112 on the base 103, not only the number of components can be saved, but also the base 103 is convenient for assembly.

[0132] In this application, a receiving groove 111 and a heating cavity 113 are formed in the base 103, and a wire routing groove 112 is formed in the bottom wall of the receiving groove 111. The linear material on the tray received in the receiving groove 111 is led out of the magazine 100 through the wire routing groove 112, making full use of the space at the bottom of the receiving groove 111 for material feeding, so as to realize the feeding function of the magazine 100. Moreover, by forming an air outlet 114 on the side wall of the wire routing groove 112 to communicate with the heating cavity 113, the air flow provided by the heating cavity 113 can enter the wire routing groove 112, and the air flow diffuses in the wire routing groove 112 to heat and dry the linear material in the wire routing groove 112. The distance between the air outlet 114 and the tray is enlarged to facilitate the diffusion of the air flow. In addition, when the magazine is filled with trays, the wire routing groove 112 can provide more flow paths for the hot air flow, avoiding the blockage of the hot air flow and forming local high temperature. In addition, the hot air flow flows along the wire routing groove and can directly flow to the outer periphery of the tray to contact the material along a shorter path, thereby improving the drying efficiency. Since the wire routing groove 112 is located at the bottom of the base 103 and the hot air flow will diffuse upward, the upward diffusing heat flow can cover all the trays, thereby further heating and drying the trays.

[0133] In one embodiment, please refer to Figure 3 and Figure 4 , the base 103 includes opposite first side 116 and second side 117 in the first direction X, and the wire routing groove 112 extends in a direction of contracting and approaching from the first side 116 to the second side 117; along the first direction X, the air outlet 114 is located at the central position of the side wall of the wire routing groove 112. One end of the wire routing groove 112 is at the central position in the second direction Y near the second side 117, and the first direction X intersects with the second direction Y.

[0134] In one embodiment, please refer to Figure 3 and Figure 4 , the base 103 includes at least one boss 115, the boss 115 is received in the wire routing groove 112, the boss 115 extends from the first side 116 to the second side 117, and the boss 115 divides the wire routing groove 112 into at least two wire routing sub-grooves 118 spaced in the second direction Y. The at least two wire routing sub-grooves 118 are spaced near the first side 116 and converge or approach near the second side 117, and the air outlet 114 is located on the side wall of the outermost wire routing sub-groove 118 along the second direction Y.

[0135] Specifically, the boss 115 is connected to the bottom wall of the wire groove 112, protruding from the bottom wall of the wire groove 112. The boss 115 extends along the first direction X, thereby dividing the wire groove 112 into at least two wire sub-grooves 118. It should be noted that the opposite first side 116 and second side 117 on the base 103 are the higher ends in the receiving groove 111. Since the wire groove 112 extends along the first direction X to restrict the feeding of materials, one boss 115 can divide the wire sub-groove 118 into two wire sub-grooves 118.

[0136] In a specific embodiment, the magazine 100 can accommodate four trays, and the four trays are symmetrically and evenly arranged in the receiving groove 111. The number of bosses 115 can be three. There is a spacing distance between the three bosses 115, and there is also a spacing distance between the two outermost bosses 115 and the corresponding side walls of the nearest wire groove 112. Therefore, the three bosses 115 divide the wire groove 112 into four wire sub-grooves 118, and each wire sub-groove 118 has a linear material passing through it.

[0137] Viewed from the front of the base 103, the shape of the wire groove 112 is fan-shaped, and the wire groove 112 presents a converging structure from the first side 116 to the second side 117. Because the linear materials on multiple trays feed from the first side 116 to the second side 117 and pass through a common outlet at the second side 117 to exit the 3D printing feeding device. Therefore, it is necessary to set the overall structure of the wire groove 112 to be converging to restrict the feeding paths of multiple linear materials.

[0138] In one implementation, please refer to Figure 3 and Figure 4 , the multiple wire sub-grooves 118 are spaced apart near the first side 116, so that each wire sub-groove 118 corresponds to a tray. The adjacent two wire sub-grooves 118 are separated by the boss 115, so that there is a spacing between the two wire sub-grooves 118. The boss 115 extends along the first direction X, and the height of the boss 115 gradually decreases. It can be understood that the base 103 is in a posture with a lower middle and higher sides. Therefore, the boss 115 should have the highest height near the first side 116 when extending along the first direction X, and the lowest height in the middle of the base 103. In one implementation, the bottom plate of the housing is a plane, and the cooperation between the base and the bottom plate of the housing can form accommodation spaces on the first side and the second side. These spaces can be used to arrange components such as PCB boards, heating components, desiccants, multi-way components, and driving components, so as to make the overall layout of the machine compact, improve the space utilization rate and reduce the unnecessary volume. In order to make the multiple wire sub-grooves 118 converge near the second side 117, the two ends of the boss 115 along the first direction X should be set in a way that one end is high and the other end is low.

[0139] In this application, a boss 115 is added to the bottom wall of the wire slot 112. The boss 115 is used to divide the wire slot 112 into multiple wire sub-slots 118, enabling the magazine 100 to install multiple trays simultaneously. Each tray can feed materials through a wire sub-slot 118, and different materials will not interfere with each other, increasing the discharging efficiency and stability of the magazine 100. At the same time, the boss 115 also plays a role in guiding the flow in the wire slot 112. The outer periphery of the boss 115 can guide and diffuse the air flow to the entire wire slot 112, thereby improving the diffusion efficiency of the air flow in the wire slot 112. Moreover, when the hot air flow diffuses upward, the area is larger, which is more conducive to the hot flow covering all the trays. The wire sub-slots 118 are arranged to extend from the first side 116 towards the second side 117, and multiple wire sub-slots 118 converge near the second side 117, enabling multiple trays to share an outlet for materials. Therefore, the magazine 100 can realize the function of converting and printing multiple materials, and thus print out printed parts with rich colors and diverse materials.

[0140] In one embodiment, please refer to Figure 3 and Figure 4 , the bottom wall of the receiving slot 111 is an arc surface, and the side wall of the wire slot 112 extends in an arc. Specifically, the wire slot 112 includes opposite first side wall 116 and second side wall 117. Among them, the air outlet 114 is opened on the first side wall 116, and both the first side wall 116 and the second side wall 117 extend in an arc. Optionally, the first side wall 116 protrudes towards the second side wall 117 to form an arc surface, and the second side wall 117 protrudes towards the first side wall 116 to form an arc surface.

[0141] In this application, the bottom wall of the receiving slot 111 is set as an arc surface to adapt to the shape of the tray, so that the tray can rotate in the receiving slot 111 without interference. And setting the side wall of the wire slot 112 to extend in an arc can facilitate the guidance of the air flow in the wire slot 112, making the air flow path more stable and reducing the convection and turbulence in the magazine 100.

[0142] In one embodiment, please refer to Figure 5A , the air outlet 114 includes a first edge 119 and a second edge 120 that are relatively spaced apart. The first edge 119 and the second edge 120 are located at the connection between the air outlet and the side wall of the wire slot. The projection of the line A connecting the first edge 119 and the second edge 120 on the bottom wall of the housing and the second direction Y has an included angle α1, and the range of the included angle α1 is 40° to 70°.

[0143] Specifically, the air outlet 114 is opened on the side wall of the wire routing groove 112. The first edge 119 and the second edge 120 are arranged at a relative interval. The interval space between the first edge 119 and the second edge 120 is the air outlet 114. The connection line A between the first edge 119 and the second edge 120 is the line segment of the interval distance between the two. The connection line A intersects both the first direction X and the second direction Y, and the connection line A has an included angle α1 with the second direction Y. Optionally, the included angle α1 can be 40°, 50°, 60°, 70°. By making the air outlet have an included angle relative to the second direction Y, the hot air flow blown out of the air outlet has a velocity component towards the second direction Y and also a velocity component towards the first direction X, so that the hot air flow can diffuse in both the first direction X and the second direction Y at the same time, making the discharged air flow more uniform.

[0144] In this application, the air outlet 114 opened on the side wall of the wire routing groove 112 is set to have an included angle α1, which can make the air flow discharged from the air outlet 114 more uniform and can enlarge the diameter of the air outlet. The air flows upward from the wire routing groove 112 in the middle, making the upward diffused air flow more uniform. It can achieve the effect of a double port through a single air outlet 114, making the air flow path smoother while saving space. Moreover, when the included angle α1 satisfies the above range, it can ensure that as much hot air as possible emitted from the heating cavity 113 blows towards the wire routing groove 112, and the wind direction is as much as possible towards the material, thereby improving the efficiency of heating the material and making the air flow diffusion more uniform.

[0145] In one embodiment, please refer to Figure 5B , the base 103 further includes a deflector 127. The deflector 127 is arranged at the air outlet 114. The deflector 127 has an included angle α2 with the projection of the second direction Y on the bottom wall of the housing 101. The range of the included angle α2 is 40° to 70°.

[0146] Specifically, multiple deflectors 127 are arranged at the air outlet 114 to guide the air flow at the air outlet 114. In the third direction Z, the opposite ends of the deflector 127 are respectively connected to the bottom wall of the receiving groove 111 and the bottom wall of the wire routing groove 112. Optionally, the included angle α2 can be 40°, 50°, 60°, 70°. By making the air outlet have an included angle relative to the second direction Y, the hot air flow blown out of the air outlet has a velocity component towards the second direction Y and also a velocity component towards the first direction X, so that the hot air flow can diffuse in both the first direction X and the second direction Y at the same time, making the discharged air flow more uniform.

[0147] The present application provides a deflector 127 at the air outlet 114 to guide the airflow from the air outlet 114 toward the wiring trough 112 in a predetermined direction. This not only enhances the airflow diffusion effect, but also guides the airflow to diffuse in the desired direction. When the angle α2 is within the above range, it ensures that the hot air emitted by the heating chamber 113 is blown as much as possible toward the wiring trough 112, and diffused by the deflector 127, making the airflow diffusion more uniform.

[0148] In one embodiment, the wiring groove 112 includes a first side wall and a second side wall relative to each other, one of the first side wall and the second side wall has a first recess, the second side wall has a second recess, the first recess and the second recess are arranged opposite to each other, the air outlet 114 is opened at the first recess, the first recess is centered relative to the bottom wall of the outer shell, the projection point of the center point of the line A connecting the first edge 119 and the second edge 120 on the bottom wall is O, the line segment of the bottom wall passing through the point O along the first direction is AB, the line segment of the bottom wall passing through the point O along the second direction is CD, OA / AB is between 0.35-0.65, and / or, OC / CD is between 0.35-0.65.

[0149] In one embodiment, the other of the first side wall and the second side wall has a second recess, and the silo also includes a multi-way piece 107, which is arranged at the intersection of multiple wiring sub-grooves 118, and each wiring sub-groove 118 is used to accommodate a built-in material guide tube, which extends into the multi-way piece 107, wherein along the first direction X, the first recess and the second recess are arranged closer to the intersection of the wiring sub-grooves 118.

[0150] In one embodiment, the heating chamber 113 is further provided with a hot air channel 129 facing the receiving groove 111, and the base 103 is further provided with an exhaust portion 128, and the hot air channel 129 is connected to the air outlet 114; the exhaust portion 128 is provided on the side away from the air supply direction of the air outlet 114, or is provided on the side deviating from the air supply direction of the air outlet 114, the exhaust portion 128 is connected to the air passage between the receiving groove and the heating chamber, and / or the exhaust portion is connected to the air passage between the receiving groove and the outside of the shell.

[0151] The base 103 is also provided with an exhaust portion 128. On the one hand, the exhaust portion 128 is used to discharge the gas and moisture contained therein, thereby keeping the receiving tank 111 dry. On the other hand, the exhaust portion 128 is used to direct the airflow to other locations in the silo 100, allowing the airflow to circulate within the silo 100. It should be explained that the hot air channel 129 is a channel formed by the airflow delivered through the heating chamber 113. The airflow is blown into the receiving tank 111 in the direction of the hot air channel 129 and diffuses within the receiving tank 111, thereby enveloping the periphery of the material tray with hot air.

[0152] It can be understood that the exhaust part 128 is arranged deviating from the air supply direction of the hot air channel 129, and the air flow conveyed by the hot air channel 129 will not directly pass through the exhaust part 128. Therefore, the air flow conveyed to the receiving groove 111 through the hot air channel 129 can first circulate in the receiving groove 111, and then when the moisture content in the receiving groove 111 is relatively high, the air flow is discharged through the exhaust part 128. In this way, the drying process can achieve the effects of rapid temperature rise and moisture removal at the same time.

[0153] The arrangement of the wire trough 112 and the heating cavity 113 provides an excellent air outlet environment inside the bin 100, so that the hot air flow in the bin 100 can not only dry the materials on the tray, but also dry the corners and materials in the wire trough 112, so as to achieve the purpose of multiple drying. However, in the process of drying materials, how to guide the air flow and how to discharge the water vapor in the air flow in time have become the key points.

[0154] Therefore, in this application, a hot air channel 129 is formed on the base 103, and the exhaust part 128 is arranged on one side deviating from the air supply direction of the air outlet 114, or on one side deviating from the air supply direction of the air outlet 114, that is, the exhaust part 128 is arranged at a position far from the hot air channel 129. The (hot) air flow discharged from the hot air channel 129 will not directly pass through the exhaust part 128, but will first heat and dry the tray in the receiving groove 111. When the air pressure in the receiving groove 111 is too high or the drying effect is achieved (for example, the temperature rises to a certain range and the relative humidity is in a certain range), part of the air flow can be released through the exhaust part 128, so as to realize the gas circulation. In this process, the path of the air flow is relatively large, and the (hot) air flow will not be directly discharged from the bin, so that more moist air can be taken away and the dehumidification effect can be improved.

[0155] In one implementation, the heating cavity 113 and the exhaust part 128 are arranged closer to the second side 117 than to the first side, and the wire trough 112 is located between the heating cavity 113 and the exhaust part 128.

[0156] In one implementation, the air supply direction of the hot air channel 129 is towards the upper part of the bottom wall of the receiving groove 111. The exhaust part 128 includes a communication cavity 121 and an exhaust port 130. The communication cavity 121 is recessed relative to the bottom wall of the receiving groove 111, so that the gas in the receiving groove 111 flows to the communication cavity 121. At least part of the exhaust port 130 faces the lower part of the bottom wall of the receiving groove 111, and the exhaust port 130 communicates with the communication cavity 121 and the gap between the base 103 and the housing 101.

[0157] Specifically, the communication cavity 121 is formed by recessing from the bottom wall of the receiving groove 111, so the communication cavity 121 communicates with the receiving groove 111. The communication cavity 121 and the heating cavity 113 are arranged along the second direction Y, and both the communication cavity 121 and the heating cavity 113 are close to the second side 117 of the base 103. The multi-pass component 107 and the wiring groove 112 connecting the multi-pass component 107 in the above embodiment are located between the communication cavity 121 and the heating cavity 113.

[0158] In a specific embodiment, when viewed from the front of the base 103, the heating cavity 113 is located on the left side of the wiring groove 112, and the first side 116 wall of the wiring groove 112 separates the wiring groove 112 and the heating cavity 113; the communication cavity 121 is located on the right side of the wiring groove 112, and the second side 117 wall of the wiring groove 112 separates the wiring groove 112 and the communication cavity 121. Moreover, on the basis of the above embodiment, the wiring groove 112 further recesses on the bottom wall of the receiving groove 111, so that the side wall of the wiring groove 112 is also the side wall of the communication cavity 121.

[0159] This application also opens a communication cavity 121 in the base 103, and the communication cavity 121 is recessed relative to the bottom wall of the receiving groove 111. Therefore, in the third direction Z, the communication cavity 121 communicates with the receiving groove 111. The hot air flow rising through the wiring groove 112 continues to sink into the communication cavity 121 after heating and drying the material tray. The desiccant in the communication cavity 121 can absorb the moisture in the air flow, thereby reducing the humidity in the bin 100.

[0160] In one embodiment, please refer to Figure 2 and Figure 9 , the bin further includes a wind valve 105. An air outlet hole 131 is opened on the outer shell 101. The space between the air outlet hole 131 and the exhaust port 130 forms an air flow channel 307. The wind valve 105 is arranged on the air flow channel 307 for controlling the opening or closing of the air flow channel 307. The receiving groove 111 is located on the upper side of the base, and the air flow channel 307 is located on the lower side of the base 103.

[0161] In one embodiment, please refer to Figure 2 and Figure 9, the outer shell 101 has a hexahedron structure. The outer shell 101 includes a connected shell bottom plate 124 and shell side plates 125. The shell side plates 125 are annular and surround the outer periphery of the base 103. The air outlet holes 131 are formed on the shell side plates 125; the air valve 105 is arranged on the side wall of the communication cavity 121, or the air valve 105 is arranged on the side wall of the shell side plates 125 facing the communication cavity 121; along the direction of the connection line between the exhaust port and the air outlet, the distance between the side wall of the communication cavity 121 and the shell side plates 125 is 30 mm to 50 mm. By defining a relatively small gap between the side wall of the communication cavity 121 and the shell side plates 125, the possibility of condensation in the bin can be reduced as much as possible. This is because when the high-temperature air in the bin is discharged to the low-temperature environment outside, the high-temperature humid air is prone to condensation when it meets cold. If the gap value is large, it will prolong the intersection length of the cold and hot airflows, thereby increasing the condensation risk. At the same time, the gap value cannot be too small, otherwise it is not convenient to install and accommodate the air valve.

[0162] Specifically, the outer shell 101 has a hexahedron structure. The shell bottom plate 124 is quadrilateral, and the shell side plates 125 are formed by connecting four sub-boards in sequence. Therefore, the contour of the outer shell 101 is in the shape of a hexahedron. In this application, the outer shell 101 of the bin 100 is designed as a hexahedron structure. After the heat flow blown out from the heating cavity 113 passes through the wire groove 112, it can spread along the length direction (the first direction X) and the width direction (the second direction Y) of the outer shell 101, so as to be more conducive to the uniform distribution of hot air in the bin 100, thereby achieving the effect of heating and drying the materials. Optionally, the distance between the side wall of the communication cavity 121 and the shell side plates 125 can be 30 mm, 40 mm, or 50 mm.

[0163] The air outlet holes 131 are formed on the shell side plates 125 of the outer shell 101, and the air outlet holes 131 can be arranged opposite to the exhaust port 130; or, in other embodiments, the air outlet holes 131 are arranged opposite to the side wall of the communication cavity 121. The air outlet holes 131 communicate the exhaust port 130 and the external space. An air valve 105 is arranged at the air outlet holes 131, and the air valve 105 at the air outlet holes 131 can be used to connect the internal and external airflows of the bin, so as to adjust the humidity in the receiving cavity 108.

[0164] In one embodiment, please refer to Figure 3 , the air inlet surface of the fan 109 faces away from the bottom wall of the receiving groove 111; the included angle β1 between the connection line B between the center point of the fan blades of the fan 109 and the center point of the air outlet 114 and the projection of the connection line C between the center point of the fan blades of the fan 109 and the center point of the exhaust port 130 on the shell bottom plate 124 is 20° to 50°. Optionally, the included angle β1 can be 20°, 30°, 40°, or 50°.

[0165] In one embodiment, please refer to Figure 3, the air inlet surface of the fan 109 faces away from the bottom wall of the receiving groove 111; the included angle β2 between the projection of the connecting line B between the center point of the fan blades of the fan 109 and the center point of the air outlet 114 on the bottom plate 124 of the housing and the projection of the connecting line K between the center point of the fan blades of the fan 109 and the center point of the air outlet hole 131 on the bottom plate 124 of the housing is 25° to 55°. Optionally, the included angle β2 can be 25°, 35°, 45°, or 55°.

[0166] In one implementation, please refer to Figure 3 , a return air port 132 is further provided on the surface of the base 103 facing away from the material tray, and the return air port 132 communicates with the heating cavity 113 and the air flow channel 307; there is a gap 126 between the base 103 and the outer shell 101, and / or, there is a gap 126 provided on the base, and the gap 126 is used to conduct the air flow between the return air port 132 and the receiving groove 111, and the fan 109 takes in air through the return air port 132 from the gap 126 through the air flow channel.

[0167] It can be understood that the base 103 is placed into the housing through the opening of the outer shell 101 and along the side wall of the housing, so the outer contour of the base 103 should be adapted to the inner contour of the receiving cavity 108 to ensure the fit between the base 103 and the outer shell 101 and prevent the base 103 from loosening and shaking inside the outer shell 101. However, overly tight installation between the outer shell 101 and the base 103 is not conducive to the circulation of gas in the silo 100 and is also not conducive to the fan 109 extracting gas from the silo 100.

[0168] In this application, a gap 126 is reserved between a partial position of the base 103 and the outer shell 101, and / or, a gap 126 is provided on the base, and the gap 126 is communicated with the heating cavity 113. Therefore, the fan 109 in the heating cavity 113 can extract the gas in the gap 126, so that a negative pressure is formed in the gap 126, and the gas in the receiving groove 111, the wire groove 112, and the communication cavity 121 all flows into the gap 126 between the base 103 and the outer shell 101 under the action of the negative pressure, thereby extending the path of the air flow in the silo 100 and making the air flow more evenly distributed in the silo 100.

[0169] In one implementation, please refer to Figure 3 and Figure 6 , there is a gap 126 between the base 103 and the outer shell 101, and / or, there is a gap provided on the base, the area of the air outlet 114 is larger than the opening area of any gap 126, and / or, the area of the return air port 132 is larger than the opening area of any gap 126.

[0170] Optionally, the blower 109 includes two opposite air inlet surfaces, one of which faces the bottom wall of the receiving groove 111, and the other air inlet surface faces the air return opening 132. Both air inlet surfaces can be used for the blower 109 to intake air. Therefore, one of the air inlet surfaces can utilize the advantage of being close to the air return opening 132 to improve the air intake efficiency.

[0171] The arrangement of the wire trough 112, the heating cavity 113, and the communication cavity 121 (exhaust part 128) provides an excellent air return path inside the silo 100, enabling the air flow in the silo 100 to have a larger circulation path, thereby fully drying the material. However, during the air intake process of the heating cavity 113, how to further shorten the air intake path of the heating cavity 113 to improve the air intake efficiency and thus improve the efficiency of the gas circulation in the silo 100 has become the key.

[0172] Therefore, in the present application, the air return opening 132 communicating with the heating cavity 113 is arranged below the base 103, that is, below the bottom wall of the receiving groove 111. On the one hand, a low-pressure environment is created at the bottom of the base 103 by the air return opening 132, so that the gas located above (receiving groove 111) and on the side (porosity 126) flows downward, further improving the large air circulation in the silo 100; on the other hand, most of the gas at the bottom of the base 103 is low-temperature gas. By pumping the low-temperature gas into the heating cavity 113 for heating, the heating efficiency of the heating cavity 113 is improved, avoiding heat waste; on the third hand, the risk of condensation at the bottom of the base 103 is relatively high. By allowing the heated gas to flow through the bottom and then return to the air return opening 132 and enter the heating cavity 113, the condensation at the bottom can also be evaporated and the high-humidity air at the bottom can be taken away, thereby reducing or avoiding condensation.

[0173] In one embodiment, please refer to Figure 3 and Figure 6 , the base 103 is received in the receiving cavity 108, and the air return opening 132 communicates with the receiving cavity 108; there is a porosity 126 between the base 103 and at least part of the outer shell 101, and the porosity 126 is used to conduct the air flow between the air return opening 132 and the receiving groove 111.

[0174] In one embodiment, the distance between the blower 109 and the air outlet 114 is less than the distance between the air return opening 132 and the exhaust port 130.

[0175] In one embodiment, please refer to Figure 9, an air inlet hole 147 is also formed in the outer shell 101. The space between the air inlet hole 147 and the air return opening 132 forms an air inlet passage for the blower 109 to intake air from outside the bin 100. An air inlet valve for controlling the opening or closing of the air inlet passage is also provided on the air inlet passage; the distance between the center point of the air inlet hole 147 and the center point of the air return opening 132 is 30 mm to 50 mm. The air inlet valve is arranged on the side wall of the heating chamber, or on the inner wall of the bottom shell plate or the side shell plate facing the heating chamber.

[0176] In one implementation, the side shell plate 125 is further provided with an air inlet hole 147 communicating with the receiving chamber 108. The air valve further includes a second air valve installed inside the lower part of the base 103 for opening or closing the air inlet hole 147. When the second air valve opens the air inlet hole 147, the air outside the bin 100 enters the receiving chamber 108 through the air inlet hole 147.

[0177] In one implementation, the included angle γ between the projection of the line C connecting the center points of the air inlet hole 147 and the air outlet 114 on the bottom shell plate 124 and the projection of the line L connecting the center point of the air inlet hole 147 and the center point of the air outlet hole on the bottom shell plate 124 is 20° to 55°. The blower 109 intakes air through the air inlet hole 147 and discharges the heated gas through the air outlet 114. In order to improve the circulation efficiency of the blower 109, the air path between the air inlet hole 147 and the air outlet 114 is generally set as a relatively smooth air flow path. The line C connecting the center points of the air inlet hole 147 and the air outlet 114 can represent the direction of this air flow path. By setting the lines C and L to have an included angle, it can be avoided that the blower 109 directly discharges the external air inhaled from the air inlet hole through the air outlet 114. The arrangement with an included angle can effectively take away the moisture-containing air in the bin and ensure the dehumidification effect.

[0178] In one implementation, please refer to Figure 7 , the bin further includes a partition cover 135 arranged at the air return opening 132. The partition cover 135 and the base 103 jointly enclose the heating chamber 113. The partition cover 135 is provided with ventilation holes 136 opposite to the blades of the blower 109.

[0179] Specifically, the silo 100 further includes a separate partition cover 135. The partition cover 135 is disposed at the air return opening 132 of the heating chamber 113, and the partition cover 135 is connected to the side of the base 103 facing away from the silo 100. Thus, the partition cover 135 and the base 103 jointly enclose the heating chamber 113. Therefore, the partition cover 135 and the bottom plate 124 of the shell are disposed opposite to each other, and the partition cover 135 is also disposed opposite to the top wall of the heating chamber 113. Vent holes 136 are formed in the partition cover 135, and the vent holes 136 communicate the heating chamber 113 and the receiving chamber 108. The fan 109 sucks the gas in the gap into the heating chamber 113 through the vent holes 136. In addition, the fan 109 and the heating element 110 are disposed on the partition cover 135, which can also reduce the probability of human touch and avoid the risk of scalding.

[0180] Optionally, a first gap 133 is reserved between the back surface of the base 103 and the bottom plate 124 of the shell, and the gas at the bottom of the base 103 can flow in the first gap 133. A second gap 134 is formed between the outer circumferential side of the base 103 and the side plate 125 of the shell, and the gas at the side of the base 103 can flow in the second gap 134. Since the gaps are formed between the outer periphery of the base 103 and the inner wall of the outer shell 101, the first gap 133 and the second gap 134 communicate with each other.

[0181] When the fan 109 is started, the fan 109 first sucks the gas in the first gap 133 through the air return opening 132, so as to form a negative pressure in the first gap 133 and the second gap 134; the gas in the receiving groove 111 flows into the first gap and the second gap 134 under the action of the negative pressure, thereby completing the large gas circulation inside the silo 100.

[0182] In this application, the outer shell 101 of the silo 100 is designed as a hexahedron structure. After the heat flow blown out from the heating chamber 113 passes through the wire trough 112, it can diffuse along the first gap 133 and the second gap 134, which is more conducive to the uniform distribution of hot air in the silo 100, thereby achieving the effect of heating and drying the materials.

[0183] The fan 109 and the heating element 110 are disposed on the partition cover 135 or the base 103, and the air inlet of the fan 109 is opposite to the vent hole 136. A first gap 133 as described above exists between the partition cover 135 and the bottom plate 124 of the shell. It can be understood that the partition cover 135 is connected to the back surface of the base 103, that is, the partition cover 135 is close to the bottom plate 124 of the outer shell 101, and the fan 109 sucks air into the gap through the vent hole 136 on the partition cover 135. Therefore, in order to ensure that the fan 109 can have a large air intake, it is necessary to avoid the partition cover 135 and the bottom plate 124 from being too close. The first gap 133 between the partition cover 135 and the bottom plate 124 ensures the air intake and also constructs the gas circulation line inside the silo 100.

[0184] In one embodiment, there is an air duct 137 between the heating chamber 113 and the communication chamber 121. The air duct 137 connects the heating chamber 113 and the communication chamber 121, and the base separates the air duct 137 from the receiving groove 111.

[0185] The arrangement of the wire groove 112, the air outlet 114, the heating chamber 113 and the communication chamber 121 provides the conditions for gas circulation inside the bin 100. The (hot) air flow discharged from the heating chamber 113 is not restricted, resulting in the dispersion of the air flow. However, due to the shape of the bin, there will still be some corners where the (hot) air flow cannot cover or is unevenly diffused, which will reduce the drying efficiency of some areas of the bin, such as the communication chamber 121. Therefore, how to solve the problem of air flow dispersion has become the key.

[0186] In some embodiments, there is a directly-connected air duct 137 between the communication chamber 121 and the heating chamber 113, so that some of the hot air blown out from the heating chamber 113 can directly enter the communication chamber 121, avoiding the situation where the dispersed air flow in the receiving groove 111 cools down and cannot activate the desiccant. The hot air flow directly connected to the communication chamber 121 can increase the temperature in the desiccant tank, thereby reactivating the desiccant, and thus ensuring the drying efficiency of the desiccant.

[0187] In one embodiment, please refer to Figure 8 , the partition cover 135 includes a first wall plate 138. The two opposite sides of the first wall plate 138 are the heating chamber 113 and the communication chamber 121 respectively, and the air permeable holes 136 connect the air duct 137.

[0188] Specifically, the first wall plate 138 is located on the side of the base 103 facing away from the tray. The first wall plate 138 divides the heating chamber 113 and the communication chamber 121. A first hole 139 is formed on the first wall plate 138. The first hole 139 can be the inlet or outlet of the above-mentioned air duct 137. Thus, the air flow flowing out of the heating chamber 113 is transmitted to the communication chamber 121 through the first hole 139 and the air duct 137.

[0189] By separating the heating chamber 113 and the communication chamber 121 with the first wall plate 138, the combination of the two chambers is avoided, and a separate first hole 139 is opened to connect the air duct 137, so that the air flow rate flowing from the heating chamber 113 into the communication chamber 121 is affected by the aperture of the first hole 139, thereby controlling the air flow rate flowing into the communication chamber 121 and preventing the air flow rate flowing into the communication chamber 121 from being too large and affecting the air flow rate in the receiving groove 111.

[0190] In one embodiment, please refer to Figure 8, the base 103 includes a second wall panel 140. The second wall panel 140 is disposed opposite to the first wall panel 138. The side of the first wall panel 138 facing away from the second wall panel 140 is the heating chamber 113. The side of the second wall panel 140 facing away from the first wall panel 138 is the communication chamber 121. A second hole 141 is formed in the second wall panel 140, and the second hole 141 communicates with the air duct 137.

[0191] Specifically, the second wall panel 140 is located on the side of the base 103 facing away from the material tray. The first wall panel 138 and the second wall panel 140 are disposed opposite to each other, and the air duct 137 as described above is between the first wall panel 138 and the second wall panel 140. Therefore, the first hole 139 is the inlet of the air duct 137, and the second hole 141 is the outlet of the air duct 137.

[0192] By providing the first wall panel 138 and the second wall panel 140 to separate the heating chamber 113 and the communication chamber 121, there is also a space for storing other parts between the first wall panel 138 and the second wall panel 140. The driving unit 300 can be placed between the second wall panel 140 and the first wall panel 138, so as to ensure the high integration of the storage bin 100.

[0193] In one embodiment, please refer to Figure 8 , the base 103 includes a connecting portion 122. The connecting portion 122 encloses the air duct 137. The two opposite ends of the connecting portion 122 are respectively connected to the first wall panel 138 and the second wall panel 140.

[0194] Specifically, the connecting portion 122 is located between the first wall panel 138 and the second wall panel 140. The connecting portion 122 connects the first wall panel 138 and the second wall panel 140, and the connecting portion 122 encloses the air duct 137. It can be understood that the connecting portion 122 and the first wall panel 138 and the second wall panel 140 are integrally connected, that is, the connecting portion 122 is also injection molded on the base 103.

[0195] By providing the integrally formed connecting portion 122, the overall strength of the base 103 can be improved, and air leakage of the air duct 137 during ventilation can also be avoided.

[0196] In one embodiment, please refer to Figure 8 , the storage bin includes a first air duct 142. The first air duct 142 encloses to form the air duct 137. The two opposite ends of the first air duct 142 are respectively connected to the first wall panel 138 and the second wall panel 140.

[0197] Specifically, the first air duct 137 can also be obtained by enclosing the first air duct 142. The first air duct 142 is different from the connecting portion 122. The first air duct 142 can be a flexible hose, and the first air duct 142 is detachably connected to the first wall panel 138 and the second wall panel 140. The two ends of the first air duct 142 can be respectively connected to the first hole 139 and the second hole 141.

[0198] By providing the detachable first air duct 142 , the setting of the air duct 137 can be adjusted according to demand. When the air duct 137 is not needed, the first air duct 142 can be removed and the first hole 139 and the second hole 141 can be blocked.

[0199] In one embodiment, please refer to Figure 8 A control valve 143 is provided on the air duct 137 , and the control valve 143 controls the gas in the air duct 137 to flow from the heating chamber 113 to the connecting chamber 121 .

[0200] Specifically, the control valve 143 can be used to control the opening or closing of the air duct 137, that is, after the control valve 143 is opened, the air duct 137 is connected, and the air flow in the heating chamber 113 is transmitted to the connecting chamber 121 through the air duct 137; after the control valve 143 is closed, the air duct 137 is blocked, and the air flow in the heating chamber 113 cannot be transmitted through the air duct 137.

[0201] In other embodiments, the control valve 143 may also have a regulating function, and the control valve 143 may control the area of the air duct 137 to control the flow rate of the air through the air duct 137. In addition, the control valve 143 is a one-way control valve 143, which only allows air to flow into the communication cavity 121, thereby increasing the air pressure in the communication cavity 121 and achieving a higher temperature.

[0202] In one embodiment, please refer to Figure 7 The silo also includes a second air duct 144 , one end of which is connected to the heating chamber 113 . The second air duct 144 extends under the base 103 . The second air duct 144 is used to transfer the gas in the heating chamber 113 to the receiving chamber 108 .

[0203] Specifically, a second air duct is disposed on the back of the base 103. One end of the second air duct is connected to the heating chamber 113, thereby directing the airflow in the heating chamber 113 out of the heating chamber 113. The other end of the second branch pipe extends to a location in the receiving chamber 108 away from the heating chamber 113. In this way, the air in the heating chamber 113 can be directed to other locations in the receiving chamber 108 through the second air duct.

[0204] In one embodiment, please refer to Figure 7 The second air duct includes a main second air duct 145 and a secondary second air duct 146. The cross-sectional area of the main second air duct 145 is larger than the cross-sectional area of the secondary second air duct 146. The secondary second air duct 146 is arranged on the side away from the air supply direction of the main second air duct 145, or the secondary second air duct 146 is arranged on the side deviating from the air supply direction of the main second air duct 145.

[0205] Specifically, the number of the second air ducts is at least two, namely a main second air duct 145 and a secondary second air duct 146. One ends of the main second air duct 145 and the secondary second air duct 146 are both communicated with the heating cavity 113, while the other ends of the main second air duct 145 and the secondary second air duct 146 extend to different positions of the receiving cavity 108.

[0206] Optionally, the cross-sectional area of the main second air duct 145 is larger than that of the secondary second air duct 146, so that the main second air duct 145 has a greater air flow rate. In a specific embodiment, the heating cavity 113 is arranged at a corner of the outer shell 101. A section of the main second air duct 145 far from the heater extends to the corner farthest from the heating cavity 113, that is, the main second air duct 145 is in a diagonal position in the receiving cavity 108. The secondary second air duct 146 extends along the first direction X or the second direction, that is, the secondary second air duct 146 is in a position parallel to the wide side or the long side in the receiving cavity 108. By arranging the main second air duct 145 and the secondary second air duct 146 in this way, the (hot) air flow can be guided to the corners where the air flow in the bin is difficult to reach, so as to make the (hot) air flow distribution in the bin more uniform.

[0207] In one embodiment, the cross-sectional area of the air duct 137 is smaller than that of the main second air duct 145. By setting the cross-sectional area of the air duct 137 to be smaller than that of the main second air duct 145, it can be ensured that most of the air flow is first transmitted to other positions in the receiving cavity 108 through the main second air duct 145 to meet the priority requirement of the air flow circulation in the receiving cavity 108.

[0208] In one embodiment, the heating element 110 includes a plurality of heating fins arranged at intervals in sequence. The plurality of heating fins all extend along the second direction Y, and the second direction Y is the extending direction of the air duct 137.

[0209] Specifically, along the second direction Y, the fan 109 is located at one end of the heating cavity 113 far from the air outlet 114, and the heating element 110 is located between the fan 109 and the air outlet 114, so that the air flow blown out by the fan 109 can be heated by the heating element 110 to form a heat flow. The heating element 110 is composed of a plurality of heating fins. The plurality of heating fins are arranged at intervals in sequence along the first direction X and extend along the second direction Y. Therefore, the air flow blown out by the fan 109 can directly pass through the gaps between the heating fins and then flow through the air duct 137 to the communication cavity 121.

[0210] In a 3D printing device, a driving motor is usually required to drive a friction wheel to convey or retract materials. During the movement of the driving motor, a large amount of heat is generated, and the heat generated is easily transferred to the materials through the friction wheel, resulting in softening or slipping of the materials. Generally, the glass transition temperature of 3D printing consumables such as PLA is about 60°C, and the glass transition temperature of PETG is about 88°C. When the motor works in a high-load scenario, its heating temperature is sufficient to soften or slip the materials. Especially when the motor directly drives the friction wheel, since there is no intermediate transmission component, the heat of the motor will be directly conducted to the driving friction wheel, so optimization is needed.

[0211] In one embodiment, the distance from the middle of the receiving groove 111 to the bottom plate 124 of the housing is less than the distances from the first side 116 and the second side 117 to the bottom plate 124 of the housing.

[0212] In one embodiment, please refer to Figure 2 , the driving unit 300 is used to drive the material line on the material tray. The driving unit 300 is arranged between the heating cavity 113 and the communication cavity 121, so that the driving unit 300 will not affect the placement of the material tray and can maximize the use of the space of the base 103. And the distance from the driving unit 300 to the communication cavity 121 is less than the distance from the driving unit 300 to the heating cavity 113, that is, the driving unit 300 is relatively closer to the communication cavity 121 than the heating cavity 113. In this way, the temperature near the driving unit 300 is lower, which is beneficial to improving the heat dissipation conditions of the driving unit 300.

[0213] Specifically, at least a part of the driving unit 300 is installed on the multi-pass part 107. The driving unit 300 is used to drive the material in the multi-pass part 107 to discharge from the discharge port and be conveyed outside the housing 304. The driving unit 300 is installed on the back of the base 103 and close to one side of the second side 117. In a specific embodiment, the driving unit 300 is arranged on the side of the base 103 facing away from the bottom wall of the receiving groove 111. In this way, the purpose of saving space can be achieved, and the influence of the driving unit 300 on the rotation of the material tray can be reduced.

[0214] Please refer to Figure 10 and Figure 11 , the driving unit 300 includes a driving part 301, a driving driving wheel 302 and a driven driving wheel 303. The driving part 301 is installed between the base 103 and the outer shell 101. The driving part 301 is used to drive the driving driving wheel 302 to rotate, so that the driving driving wheel 302 drives the material to convey or retract. The driving driving wheel 302 and the driven driving wheel 303 are installed in the multi-pass part 107. The driven driving wheel 303 and the driving driving wheel 302 are located on opposite sides of the material, so that the material is clamped by the driven driving wheel 303 and the driving driving wheel 302 and conveyed or retracted.

[0215] Specifically, please refer to Figure 10, an air flow channel 307 is formed between the base 103 and the outer shell 101. The receiving groove 111 and the air flow channel 307 are located on two opposite sides of the base 103. The heating cavity 113 is located on the side of the base 103 facing away from the receiving groove 111, and the heating cavity 113 communicates with the air flow channel 307 and the receiving groove 111. The communication cavity 121 is located on the side of the base 103 facing away from the heating cavity 113, and the heating cavity 113 and the communication cavity 121 are located in the multi-pass component

[0216] At least a part of the side of the base 103 facing away from the receiving groove 111 is recessed to form an air flow channel 307 with the outer shell 101. The air flow channel 307 communicates with the heating cavity 113 and the outside of the outer shell 101. Among them, at least a part of the driving unit 300 is located in the air flow channel 307, and air flow channels 307 are formed on both opposite sides of the driving unit 300, so that the air in the air flow channel 307 forms wind in the air flow channel 307 under the action of the fan 109. The formed wind can take away the heat generated by the driving unit 300 between the two air flow channels 307, thereby realizing heat dissipation of the driving unit 300. Among them, the air flow channel 307 communicates with the outside of the outer shell 101.

[0217] Specifically, when the fan 109 operates, the fan 109 can pump the air in the air flow channel 307 into the heating cavity 113 to form wind. The fan 109 blows the formed wind to the heating element 110 and heats it through the heating element 110, and then the hot wind blows to the receiving groove 111 under the action of the fan 109, thereby delivering hot wind into the receiving groove 111.

[0218] Please refer to Figure 11 , a return air opening 132 is formed on the side wall of the heating cavity 113 facing away from the receiving groove 111. The return air opening 132 communicates with the air flow channel 307 and the heating cavity 113, that is, a return air opening 132 is formed on the side of the fan 109 facing away from the receiving groove 111, and the return air opening 132 communicates with the air flow channel 307. When the fan 109 rotates, the air in the air flow channel 307 enters the heating cavity 113 through the return air opening 132 and is heated by the heating element 110 in the heating cavity 113, thereby realizing the supply of hot wind to the receiving groove 111.

[0219] The desiccant in the communication cavity 121 absorbs the water vapor in the receiving groove 111 to keep the environment in the receiving groove 111 dry and provide a suitable working environment for the 3D printing feeding device.

[0220] Please refer to Figure 12 , the driving member 301 includes a housing 304, a driving portion 305 and a driving shaft 306. The housing 304 houses the driving portion 305. The driving portion 305 drives the driving wheel 302 to rotate through the driving shaft 306, so that the driving wheel 302 drives the material to be conveyed or retracted.

[0221] In this application, an air flow channel 307 is formed between the base 103 and the housing 101 along the axial direction of the driving part 305. In this way, the heat generated by the driving part 305 can be dissipated by heat exchange with the air in the air flow channel 307, reducing the situation where heat is conducted to the driving wheel 302 through the driving shaft 306, thereby reducing the influence of the heat generated by the driving part 305 on the material and reducing or avoiding the softening or slipping of the material.

[0222] Exemplarily, air flow channels 307 are formed on both opposite sides of the driving unit 300 along the arrangement direction of the driving part 305 and the driving wheel 302. With such a setting, the heat generated by the driving part 305 can be dissipated by heat exchange with the air in the air flow channels 307 on both sides, effectively improving the heat dissipation effect.

[0223] Specifically, a blower 109 can be used to accelerate the fluidity of the air in the air flow channel 307 and form wind in the air flow channel 307. The air flow in the air flow channel 307 flows through the driving member 301 to take away the heat generated by the driving member 301, realizing the heat dissipation of the driving member 301.

[0224] The driving part 305 is specifically a motor, which provides power for the rotation of the driving shaft 306. The driving part 305 is located on the side of the multi-pass part 107 facing the communication cavity 121. Generally, the temperature in the heating cavity 113 is relatively higher than that at the communication cavity 121. Setting the driving part 305 on the side of the multi-pass part 107 facing the communication cavity 121 can reduce the influence of the temperature at the heating cavity 113 on the driving part 305 and can effectively reduce the inlet air temperature, which is beneficial to improving the heat dissipation efficiency of the driving part 305.

[0225] The driving part 305 drives the driving wheel 302 to rotate, and the driving wheel 302 drives the material at the multi-pass part 107 to be conveyed or retracted.

[0226] Specifically, please refer to Figure 2 , the multi-pass part 107 is installed on the second side 117. The multi-pass part 107 includes at least two feed ports and one discharge port, and a plurality of wire routing sub-grooves 118 are in one-to-one correspondence and communication with the plurality of feed ports.

[0227] Specifically, the multi-pass part 107 is installed on the second side 117, and it is located at the lowest point of the second side 117 in the third direction Z. The multi-pass part 107 is used to collect multiple materials and selectively output one material. Therefore, the multi-pass part 107 includes a plurality of feed ports and one discharge port, where the feed ports face the wire routing groove 112 and the discharge port faces away from the wire routing groove 112. Therefore, the linear materials passing through the wire routing sub-grooves 118 enter the multi-pass part 107 through the corresponding one feed port and can be selectively output from the discharge port.

[0228] In this application, by installing the multi-way component 107 at the second side 117 of the base 103, materials passing through multiple wire routing sub-grooves 118 can enter the multi-way component 107, and one of the materials can be selectively sent out of the material bin 100 through the multi-way component 107. In addition, the multi-way component 107 is located at the lowest point of the base 103 in the third direction Z. The wire routing sub-grooves 118 can avoid mutation areas of the materials, resulting in less resistance during the material feeding process and facilitating the user to operate the multi-way component 107 through the wire routing groove 112.

[0229] The multi-way component 107 includes a feed inlet 315 and a discharge outlet 316. The number of feed inlets 315 is multiple, and each feed inlet 315 corresponds to a material tray. Specifically, the driving part 305 drives the driving wheel 302 to rotate, so that the material of one of the material trays is conveyed from the feed inlet 315 to the discharge outlet 316; alternatively, the driving part 305 drives the driving wheel 302 to rotate, so that the material retreats from the discharge outlet 316 to the feed inlet 315.

[0230] In the prior art, a driving motor and a reduction gear are generally connected to a friction wheel for driving, but this will cause an increase in the size occupied by the driving mechanism. When using a reduction gear for driving, due to the high rotational speed of the driving motor, a large gear meshing noise will be generated under working conditions such as rapid material retreat. When the 3D printing device is placed in a bedroom scenario or needs to work across day and night for a long time, the gear meshing noise will affect the user and reduce the use experience of the 3D printing device.

[0231] In this application, the driving part 305 is directly connected to the driving shaft 306, and the driving wheel 302 is installed on the driving shaft 306. By directly driving the driving wheel 302 to rotate through the driving shaft 306, the gear meshing noise caused by using a reduction gear for driving can be avoided, which is beneficial to reducing the overall noise of the material bin 100 and improving the use experience of the 3D printing device.

[0232] In this application, the driving part 305 and the heating chamber 113 are located on opposite sides of the multi-way component 107. In this way, when the fan 109 operates, the air in the air flow channel 307 exchanges heat with the driving part 305 and then flows to the return air inlet 132 and thus enters the heating chamber 113, so that the air entering the heating chamber 113 has a higher temperature, which is beneficial to reducing the power consumption of the heating element 110.

[0233] In one implementation, please refer to Figure 12, the driving member 301 further includes heat dissipation fins 308, and the heat dissipation fins 308 are arranged outside the housing 304. The heat dissipation fins 308 can be of a flat plate structure. The heat dissipation fins 308 effectively increase the heat exchange surface area of the driving part 305, improve the heat exchange efficiency, and thus improve the heat dissipation efficiency. Since the driving part 305 directly drives the driving wheel 302 through the driving shaft 306, the heat generated by the driving part 305 is more likely to be conducted to the driving wheel 302 through the driving shaft 306, resulting in the heat on the driving wheel 302 softening the material and causing slippage. In this application, by setting the heat dissipation fins 308, the heat dissipation effect of the driving part 305 is further accelerated, and the influence of the heat generation of the driving part 305 on the material is reduced.

[0234] Exemplarily, the housing 304 is the housing 304 provided with heat dissipation fins 308, and the heat dissipation fins 308 are located on the outer peripheral side of the housing 304. The housing 304 and the heat dissipation fins 308 can be of an integrally formed structure, which simplifies the installation process of the driving member 301 and is beneficial to shortening the heat dissipation path between the housing 304 and the heat dissipation fins 308, thereby improving the heat dissipation effect on the driving member 301.

[0235] Furthermore, the number of the heat dissipation fins 308 is multiple, and the multiple heat dissipation fins 308 are arranged at intervals. An adjacent two heat dissipation fins 308 form a heat dissipation channel 309, and the heat dissipation channel 309 is communicated with the air flow channel 307. The opposite ends of the heat dissipation channel 309 along the axial direction of the driving part 305 are respectively opened towards the air flow channels 307 on both sides of the driving unit 300.

[0236] Specifically, please refer to Figure 12 , the multiple heat dissipation fins 308 are uniformly arranged at intervals on the circumferential surface of the housing 304. The opposite ends of the heat dissipation channel 309 along the axial direction of the driving part 305 are respectively opened towards the air flow channels 307 on both sides of the driving unit 300. In this way, the air in one air flow channel 307 can flow along the axial direction of the driving part 305 through the heat dissipation channel 309 and reach the air flow channel 307 on the other side, accelerating the air circulation around the driving part 305. The air in the heat dissipation channel 309 exchanges heat with the surfaces of the heat dissipation fins 308 on both sides of the heat dissipation channel 309, thereby improving the heat dissipation efficiency of the driving part 305.

[0237] In addition, when the driving part 305 operates continuously, the heat dissipation fins 308 on the housing 304 can assist the driving part 305 to dissipate heat sufficiently, reduce or avoid the situation that heat is conducted to the driving wheel 302 through the driving shaft 306, and can effectively reduce or avoid the situation of material softening or slippage.

[0238] The drive unit 305 and the heat sink fins 308 are both located on the side of the multi-pass member 107 facing the communication cavity 121. Placing the drive unit 305 and the heat sink fins 308 on the side away from the heater 110 provides a cooler environment for the drive unit 305, facilitating stable operation of the drive unit 305. Furthermore, the low-temperature environment surrounding the drive unit 305 lowers the temperature of the airflow passing through the heat sink fins 308, improving the heat exchange efficiency between the heat sink fins 308 and the airflow, thereby enhancing the heat dissipation effect on the drive unit 305.

[0239] In another embodiment, please refer to Figure 13 The drive unit 300 further includes a fan blade 310, which is in driving connection with the drive shaft 306. The fan blade 310 is located in the air flow channel 307. Thus, the fan blade 310 can rotate under the drive shaft 306, thereby pushing the air around the air flow channel 307 to form a wind, which is beneficial to improving the air flow around the drive unit 300 and thus improving the heat exchange efficiency.

[0240] Specifically, when the driving unit 300 is working, the driving shaft 306 rotates to drive the fan blades 310 to rotate, so the airflow generated by the rotation of the fan blades 310 can be used to blow off the remaining material debris on the active driving wheel 302.

[0241] Furthermore, along the axial direction of the drive shaft 306, the fan blade 310 is closer to the side of the connecting cavity 121 relative to the heating cavity 113, that is, the fan blade 310 is away from the heating element 110 in the heating cavity 113, wherein the drive shaft 306 and the drive part 305 are coaxially arranged, thereby reducing the impact of the airflow heated by the heating element 110 on the drive unit 300, thereby reducing the inlet air temperature at the drive unit 300, avoiding heat accumulation, and accelerating heat dissipation.

[0242] In the present application, the rotation of the drive shaft 306 is used to drive the fan blades 310 to rotate, so that the fan blades 310 form an airflow for heat dissipation at the drive unit 300, which not only achieves the cooling effect, but also blows away the residual material debris on the active drive wheel 302; in addition, the fan blades 310 are away from the heating chamber 113 to avoid the hot air flow discharged from the heating chamber 113 from being introduced into the drive unit 300, thereby avoiding the influence of the hot air flow on the drive unit 300.

[0243] In one embodiment, the fan blades 310 are located between the driving portion 305 and the active driving wheel 302. Thus, the fan blades 310 rotate under the drive shaft 306 and promote the air flow in the air flow channel 307.

[0244] In another embodiment, please combine Figure 13 and Figure 14, the wind blade 310 is located on the side of the active drive wheel 302 away from the drive part 305. The wind formed by the rotation of the wind blade 310 can accelerate the blowing away of the heat conducted to the wind blade 310, which is beneficial to improving the heat dissipation efficiency of the drive part 305. Similarly, the wind formed by the rotation of the wind blade 310 can also blow away the residual material debris on the active drive wheel 302.

[0245] It can be understood that in other embodiments, heat dissipation fins 308 and wind blades 310 can be simultaneously arranged in the drive unit 300. Through the action of the heat dissipation fins 308 and the wind blades 310, the heat dissipation effect on the drive part 305 is strengthened, the influence of the heat generated by the drive part 305 on the active drive wheel 302 is reduced or avoided, and thus the phenomenon of material softening and slipping is reduced or avoided.

[0246] In this embodiment, the drive shaft 306 can pass through the multi-pass part 107, and one end of the drive shaft 306 away from the drive part 305 is connected to the wind blade 310. Alternatively, the drive unit 300 may further include an active gear 311, a rotating shaft 312, and an accelerating gear 313. Among them, the active gear 311 is fixedly connected to the drive shaft 306, the active gear 311 meshes with the accelerating gear 313, and the accelerating gear 313 is connected to the wind blade 310 through the rotating shaft 312. The drive part 305 drives the active gear 311 and the accelerating gear 313 to rotate through the drive shaft 306, so as to drive the wind blade 310 to rotate through the rotating shaft 312. It can be understood that through the meshing of the active gear 311 and the accelerating gear 313, the wind blade 310 can have a higher rotation speed than the active drive wheel 302.

[0247] Exemplarily, please refer to Figure 13 , the drive unit 300 may further include a cleaning part 314. The cleaning part 314 cooperates with the active drive wheel 302, and the cleaning part 314 is in transmission connection with the drive shaft 306. The cleaning part 314 cooperates with the outer peripheral surface of the active drive wheel 302 to rotate under the drive of the drive part 305 so as to scrape off the material debris on the active drive wheel 302 and reduce the residual material debris at the active drive wheel 302.

[0248] Specifically, the cleaning part 314 is located on the side of the active drive wheel 302 away from the driven drive wheel 303. The cleaning part 314 can be a wheel provided with scraping teeth. The scraping teeth on the cleaning part 314 cooperate with the outer peripheral surface of the active drive wheel 302, so as to scrape off the residual material debris on the active drive wheel 302 when rotating.

[0249] Please refer to Figure 13 and Figure 14, when the driving unit 300 includes a driving gear 311, a rotating shaft 312 and an accelerating gear 313, the cleaning member 314 can be installed on the rotating shaft 312. The driving part 305 drives the driving gear 311 and the accelerating gear 313 to rotate through the driving shaft 306, so as to drive the cleaning member 314 to rotate through the rotating shaft 312.

[0250] When the driving unit 300 includes a fan blade 310, the fan blade 310 can also blow away the material debris between the cleaning member 314 and the driving wheel 302 when rotating, reducing the material debris at the driving wheel 302.

[0251] Please refer to Figure 4 and Figure 6 , the silo 100 further includes a pressing member 317, and the pressing member 317 is installed on the multi-pass member 107. Specifically, the pressing member 317 is connected to the driven driving wheel 303, and the pressing member 317 is used to drive the driven driving wheel 303 to press or release the material. Specifically, the pressing member 317 penetrates through the housing 101 and extends into the multi-pass member 107 to be connected to the driven driving wheel 303, and the pressing member 317 is exposed on the side of the base 103 facing the outside of the silo 100 to facilitate applying pressure to the pressing member 317. The pressing member 317 being exposed on the side of the base 103 facing the outside of the silo 100 means that the pressing member 317 is arranged on the surface of the multi-pass member 107 facing away from the housing bottom plate 124.

[0252] Among them, the pressing member 317 can drive the driven driving wheel 303 to press the material under the action of pressure, so that the driving wheel 302 conveys the material pressed between the driving wheel 302 and the driven driving wheel 303 to the discharge port 316 under the driving action of the driving part 305. When the pressure on the pressing member 317 disappears, the acting force of the pressing member 317 on the driven driving wheel 303 disappears, and the driven driving wheel 303 releases the material.

[0253] Specifically, the multi-pass member 107 includes a rotating shaft 318, a connecting rod structure 319 and a return spring 320. The rotating shaft 318 and the connecting rod structure 319 are hinged, and the rotating shaft 318 penetrates through the connecting rod structure 319. The connecting rod structure 319 is connected to the driven driving wheel 303, and the connecting rod structure 319 is used to drive the driven driving wheel 303 to approach or move away from the driving wheel 302. The return spring 320 connects the pressing member 317 and the connecting rod structure 319.

[0254] It should be noted that the driven driving wheel 303 can rotate relative to the connecting rod structure 319. When the connecting rod structure 319 moves, the connecting rod structure 319 drives the driven driving wheel 303 to move to change the gap size between the driven driving wheel 303 and the driving wheel 302, so as to press or release the material.

[0255] The axial direction of the rotating shaft 318 is the same as that of the driven driving wheel 303. The rotating shaft 318 and the driven driving wheel 303 are arranged at intervals, and the rotating shaft 318 is located between the driven driving wheel 303 and the return spring 320. When the pressing member 317 is pressed to compress the return spring 320, the return spring 320 drives the link structure 319 to rotate relative to the rotating shaft 318, and the link structure 319 drives the driven driving wheel 303 to move to increase the gap between the driven driving wheel 303 and the driving driving wheel 302, thereby releasing the material. If the pressing member 317 is released, the return spring 320 naturally elongates due to the compression elastic force, the link structure 319 rotates relative to the rotating shaft 318, and the link structure 319 drives the driven driving wheel 303 to move to reduce the gap between the driven driving wheel 303 and the driving driving wheel 302, thereby pressing the material tightly.

[0256] In one embodiment, please refer to Figures 15 to 17 , the air valve 105 includes a swing arm 511, a baffle 513 and a base 515 which are connected and arranged. An air flow passage is formed between the base 515 and the baffle 513. The swing of the swing arm 511 is used to drive the baffle 513 to move relative to the base 515 to open or close the air flow passage.

[0257] The base 515 is used to carry other structures and components of the baffle 513, the swing arm 511 and other air valves 105. The baffle 513 is connected to the base 515, the swing arm 511 is rotatably connected to the base 515, and the rotation of the swing arm 511 drives the baffle 513 to move relative to the base 515.

[0258] There is a spaced area between the lower side of the base 103 and at least part of the outer shell 101. The air valve 105 is installed in the spaced area to open or close the air flow passage between the outside of the outer shell 101 and the receiving cavity 108 of the silo 100. The air valve 105 is installed on the base 103 or the outer shell 101. It can be understood that the air valve 105 can be connected to at least one of the base 103 and the outer shell 101. For example, the air valve 105 can be installed on the outer wall or the inner wall of the outer shell 101 or the outer wall of the base 103. In one embodiment, the base 103 is provided with a mounting plate opposite to at least part of the outer shell 101, and the air valve 105 is installed on the mounting plate. The gap width range of the spaced area formed between the mounting plate and the shell side plate 125 is [30 mm, 50 mm].

[0259] In one embodiment, please refer to Figures 15 to 17, the baffle 513 is provided with a first chute 5131, and the swing arm 511 is slidably connected to the first chute 5131. The first chute 5131 is used to guide the movement of the baffle 513. The length range of the first chute 5131 can be but is not limited to [3.5 mm, 6 mm] to define the movement stroke of the baffle 513 relative to the base 515. The movement of the swing arm 511 along the first chute 5131 can drive the baffle 513 to move relative to the base 103 to open the exhaust port 130 and discharge the moisture in the bin 100. Since the swing arm 511 moves along the first chute 5131 during swinging to drive the baffle 513 to move relative to the base 103, the first chute 5131 guides the movement of the baffle 513, which is beneficial to improving the smoothness of the movement of the baffle 513 relative to the base 103. In one embodiment, the baffle 513 can be slidably connected to the base 515. The baffle 513 is provided with a first sliding portion 5133, and the surface of the base 515 opposite to the baffle 513 is provided with a second sliding portion 5153. The first sliding portion 5133 is slidably connected to the second sliding portion 5153. One of the first sliding portion 5133 and the second sliding portion 5153 is a second chute, and the other of the first sliding portion 5133 and the second sliding portion 5153 is a protrusion. The protrusion passes through the second chute and can slide along the second chute. Through the sliding fit between the protrusion and the second chute, the sliding connection between the base 515 and the baffle 513 is realized, the structure is simple, and the convenience of assembling between the base 515 and the baffle 513 is improved. It can be understood that in some embodiments, the baffle 513 can be rotatably connected to the base 515.

[0260] The internal circulation air flow environment of the bin 100 is realized by closing the exhaust port 130 through the air valve 105, so that the inside of the bin 100 is isolated from the outside of the bin 100, and the inside of the bin 100 becomes a closed space. This requires that there is good sealing between the air valve 105 and the installation location (such as the housing 101). However, when the air valve 105 closes the exhaust port 130, although the air valve 105 is in a sealed state, an air gap is inevitably formed between the air valve 105 and the installation location.

[0261] In one embodiment, please refer to Figures 15 to 17 , the baffle 513 is further provided with a first communication hole 5132, the base 515 is provided with a second communication hole 5151, and the rotation of the swing arm 511 drives the baffle 513 to move relative to the base 515 so that the first communication hole 5132, the second communication hole 5151, and the air flow passage are conducted. When the first communication hole 5132, the second communication hole 5151, and the air flow passage are conducted, the first communication hole 5132, the second communication hole 5151, and the air flow passage are communicated with the exhaust port 130.

[0262] In the stacking direction of the baffle 513 and the base 103, when the overlapping area of the projection of the exhaust port 130 on the baffle 513 and the first communication hole 5132 is greater than 0, the air valve 105 opens the exhaust port 130, and when the overlapping area of the projection of the exhaust port 130 on the baffle 513 and the first communication hole 5132 is equal to 0, the air valve 105 closes the exhaust port 130. By providing the first communication hole 5132 on the baffle 513 to connect the exhaust port 130 and the receiving cavity 108, when the air valve 105 closes the exhaust port 130, it is beneficial to extend the air gap length and increase the sealing performance of the air valve 105.

[0263] It can be understood that the baffle 513 can omit the first communication hole 5132. When the baffle 513 covers the exhaust port 130, the air valve 105 closes the exhaust port 130, and when the baffle 513 does not cover the exhaust port 130, the air valve 105 opens the exhaust port 130.

[0264] In one embodiment, please refer Figures 15 to 17 , in the extending direction of the first sliding portion 5133, the center of the first communication hole 5132 is eccentrically arranged relative to the center of the baffle 513. In this way, it is beneficial to extend the air gap length when the air valve 105 is in the sealed state, thereby improving the sealing performance of the air valve 105.

[0265] By reasonably arranging the position of the first communication hole 5132, on the one hand, the air valve 105 can be miniaturized. In this way, when installing the air valve 105, the external exhaust air path can be shortened, the possibility of condensation can be reduced, and the miniaturized air valve 105 is easy to drive; in addition, it is also necessary to extend the air gap length when the air valve 105 is in the sealed state as much as possible within the limited size, thereby improving the sealing performance of the air valve 105.

[0266] In one embodiment, when the baffle 513 closes the air flow passage, the range of the shortest distance between the edge of the second communication hole 5151 and the edge of the first communication hole 5132 is [1 mm, 10 mm].

[0267] In one embodiment, the first communication hole 5132 can be a circular hole, and the aspect ratio of the baffle 513 ranges from [1.4, 1.9], which is beneficial to further extend the air gap length when the air valve 105 is in the sealed state, thereby improving the sealing performance of the silo 100. It can be understood that the shape of the first communication hole 5132 in this application is not limited. For example, the first communication hole 5132 can be a regular or irregular shaped hole such as a square.

[0268] In one embodiment, the shortest distance between the edge of the first communication hole 5132 and the edge of the baffle 513 is in the range of [1.5 mm, 5 mm], which helps to further extend the air gap length when the damper 105 is in a sealed state, thereby improving the sealing performance of the damper 105. It will be understood that this application does not limit the shortest distance range between the edge of the first communication hole 5132 and the edge of the baffle 513.

[0269] In one embodiment, the ratio of the area of the first communication hole 5132 to the area of the baffle 513 is in the range of [0.06, 0.3], which helps to further extend the air gap length when the damper 105 is in a sealed state, thereby improving the sealing performance of the damper 105. It is understood that this application does not limit the range of the ratio of the area of the first communication hole 5132 to the area of the baffle 513.

[0270] In one embodiment, see Figures 15 to 17 The baffle 513 includes a first edge 5134, a second edge 5135, a third edge 5136, and a fourth edge 5137, which are connected end to end. The first edge 5134 and the third edge 5136 are opposite each other, while the second edge 5135 and the fourth edge 5137 are opposite each other. A first sliding portion 5133 is provided between the first edge 5134 and the first connecting hole 5132, a first sliding portion 5133 is provided between the third edge 5136 and the first connecting hole 5132, and a first sliding groove 5131 is provided between the first connecting hole 5132 and the second edge 5135. The baffle 513 can be generally rectangular or square in shape, meaning that the first edge 5134 and the third edge 5136 can be parallel to each other. By arranging the first sliding groove 5131 at the edge of the baffle 513, the air gap length can be extended, thereby improving the sealing performance of the damper 105. It is understood that the baffle 513 in this application can also have other shapes, such as circular, triangular, or elliptical.

[0271] In one embodiment, see Figures 15 to 17 The swing arm 511 includes a connecting portion 5113, an arm body 5111, and an anti-detachment buckle 5115. The connecting portion 5113 and the anti-detachment buckle 5115 are disposed at opposite ends of the arm body 5111 to form a swing arm. The baffle 513 is located between the anti-detachment buckle 5115 and the arm body 5111. The maximum width of the anti-detachment buckle 5115 is greater than the maximum width of the first slide groove 5131. The anti-detachment buckle 5115 provided on the swing arm 511 prevents the swing arm 511 from detaching from the baffle 513.

[0272] In one embodiment, the swing angle range of the swing arm 511 relative to the 0° axis is [-35°, 45°], and the 0° axis is parallel to the extension direction of the first sliding groove 5131 to limit the movement range of the baffle 513.

[0273] The air valve 105 further includes a bottom plate 517, and the bottom plate 517 covers the base 515. The baffle plate 513 is located between the bottom plate 517 and the base 515. The bottom plate 517 is provided with a third communication hole 5171, and the first communication hole 5132, the second communication hole 5151, the third communication hole 5171, and the air flow path can be communicated with each other.

[0274] In one embodiment, when the base 515 or the bottom plate 517 is installed on the outer wall of the base 103 and is hermetically connected to the outer wall of the base 103, the area between the housing 101 and the air valve 105 is communicated with the external environment. The internal space of the silo 100 is communicated with the area between the housing 101 and the air valve 105 through the air valve 105. In other words, the inside of the silo 100 is only communicated with the external environment through the first communication hole 5132 on the baffle plate 513. Thus, when the baffle plate 513 moves between the bottom plate 517 and the base 515, the on-off of the air flow between the silo 100 and the external environment can be controlled.

[0275] In another embodiment, the base 515 or the bottom plate 517 is installed on the inner wall of the housing 101 and is hermetically connected to the inner wall of the housing 101. Thus, when the baffle plate 513 moves between the bottom plate 517 and the base 515, the on-off of the air flow between the silo 100 and the external environment can be controlled.

[0276] In one embodiment, the baffle plate 513 is located between the bottom plate 517 and the base 515, and the bottom plate 517 and the base 515 are hermetically connected to the housing 101 and the base 103.

[0277] In some embodiments, the base 515 or the bottom plate 517 of the air valve 105 can be an independent part from the base 103 or the housing 101, or can be an integrally formed part. In one possible implementation, the base 515 can be integrally formed with the base 103. For example, the base 515 can be a part of the outer wall of the base 103. The baffle plate 513 is movably connected to the base 515, and the bottom plate 517 is connected to the base 515. In one possible implementation, the bottom plate 517 can be integrally formed with the housing 101. For example, the bottom plate 517 can be a part of the inner wall of the housing 101. The base 515 is connected to the bottom plate 517, and the baffle plate 513 is located between the base 515 and the bottom plate 517. In one possible implementation, for example, the base 515 can be integrally formed with the base 103, the bottom plate 517 can be integrally formed with the housing 101. The base 515 can be a part of the outer wall of the base 103, the bottom plate 517 can be a part of the inner wall of the housing 101. The base 515 is connected to the bottom plate 517, and the baffle plate 513 is located between the base 515 and the bottom plate 517.

[0278] In one embodiment, please refer to Figures 15 to 17, on the side of the bottom plate 517 facing away from the baffle 513, there is a flange 5173, and the flange 5173 is arranged around the third communication hole 5171. The air valve 105 further includes a sealing ring 520, and the sealing ring 520 is sleeved outside the flange 5173. When the air valve 105 is installed between the outer wall of the base 103 and the inner wall of the housing 101, the flange 5173 is used to pass through the exhaust port 130, and the sealing ring 520 is used to be sealingly connected between the housing 101 and the flange 5173 to improve the sealing performance between the air valve 105 and the housing 101.

[0279] In one embodiment, please refer Figures 15 to 17 , the flange 5173 extends radially outward along the flange 5173 to form a buckle 5175. Both the buckle 5175 and the sealing ring 520 are located on the side of the housing 101 facing away from the base 103. The buckle 5175 is used to hold the sealing ring 520 to prevent the sealing ring 520 from detaching from the flange 5173.

[0280] In one embodiment, please refer Figures 15 to 17 , on the side of the baffle 513 facing the base 515 or on the side of the base 515 facing the baffle 513, there are convex ribs 5155. The extending direction of the second chute is the same as the extending direction of the convex ribs 5155. In this way, the convex ribs 5155 can guide the sliding of the baffle 513 relative to the base 103 to reduce the sliding friction between the baffle 513 and the base 515, and can also increase the airtightness between the baffle 513 and the base 515.

[0281] In one embodiment, the height range of the convex ribs 5155 is (0, 0.5 mm]. For example, the height of the convex ribs 5155 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm. In this way, the height of the convex ribs 5155 will not be too high to affect the movement between the baffle 513 and the base 515, nor will it be too low to affect the guiding effect on the sliding of the baffle 513. It can be understood that if the baffle 513 and the base 515 are directly in contact with each other on a large surface, it is easy to produce warping or tight fitting, which will cause serious air leakage or jamming of the air valve 105. Therefore, some convex ribs 5155 with a small height need to be set as the mating parts, and the convex ribs 5155 are arranged along the long side direction of the baffle 513, so that the air flow flows along the longer direction of the baffle 513, thereby increasing the air gap.

[0282] It can be understood that the present application does not limit that the extending direction of the second chute is the same as the extending direction of the convex ribs 5155. There are convex ribs 5155 on the side of the baffle 513 facing the base 515 or on the side of the base 515 facing the baffle 513.

[0283] It can be understood that one of the surface of the baffle 513 facing the base 515 and the surface of the base 515 facing the baffle 513 is provided with a rib 5155, and the other of the surface of the baffle 513 facing the base 515 and the surface of the base 515 facing the baffle 513 includes a flat surface, and the flat surface is in contact with the rib 5155. Since the rib 5155 cooperates with the flat surface, while ensuring the airtightness between the baffle 513 and the base 515, it is beneficial to reduce the friction of the relative movement between the baffle 513 and the base 515.

[0284] It can be understood that in some embodiments, the rib 5155 can be omitted. The surface of the baffle 513 facing away from the base 103 is a first flat surface, and the side of the base 515 facing the bottom plate 517 includes a second flat surface. The first flat surface is in contact with the second flat surface. In this way, the mating surfaces of the baffle 513 and the base 515 are both flat surfaces, which is beneficial to reducing the frictional resistance between the baffle 513 and the base 515. It can be understood that the present application does not limit the mating surfaces of the baffle 513 and the base 515 to be flat surfaces.

[0285] In one embodiment, please refer to Figures 15 to 17 , the air valve 105 further includes an electromagnet 518 and a permanent magnet 519. One of the electromagnet 518 and the permanent magnet 519 is provided on the base 515, and the other of the electromagnet 518 and the permanent magnet 519 is provided on the swing arm 511. The electromagnet 518 is used to be energized to interact with the permanent magnet 519, and then drive the swing arm 511 to drive the baffle 513 to move. Through the interaction between the electromagnet 518 and the permanent magnet 519, it can be ensured that the air valve 105 switches between the open position and the closed position, and the cost is very low and the thickness is very thin. When the air valve 105 is in the open position, the first communication hole 5132, the second communication hole 5151, the third communication hole 5171, and the air flow passage are in communication. When the air valve 105 is in the closed position, the first communication hole 5132, the second communication hole 5151, the third communication hole 5171, and the air flow passage are not in communication.

[0286] In one embodiment, the electromagnet 518 includes a soft magnetic yoke structure and a coil. The soft magnetic yoke structure is fixed to the base 515, and the coil is wound around the soft magnetic yoke structure. One end of the swing arm 511 is fixed to the permanent magnet 519 to rotate relative to the base 515, and the other end of the swing arm 511 is connected to the baffle 513. It can be understood that the present application does not limit the specific structure of the electromagnet.

[0287] In one embodiment, the present application further provides a 3D printing feeding device. The 3D printing feeding device includes a material tray and the material bin 100 in the above embodiment. The receiving groove 111 is used to receive the material tray, and the material tray is used to carry the material.

[0288] In one embodiment, the present application further provides a 3D printing device. The 3D printing device includes a 3D printer and a 3D printing feeding device.

[0289] In one implementation, the present application further provides a 3D printing device, and the 3D printing device includes a 3D printer, in which an air valve 105 is provided.

[0290] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0291] The above-disclosed is only a preferred embodiment of the present application, and of course, the scope of the rights of the present application cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A silo for a 3D printing feeding device, characterized in that, include: a shell enclosing the receiving cavity; a base, housed in the housing cavity; The base is provided with a receiving groove, a heating chamber and an exhaust portion, wherein the receiving groove is formed on the upper side of the base and is used to receive a plurality of material trays, and at least a portion of the bottom wall of the receiving groove is adapted to the shape of the material trays, and the heating chamber and the exhaust portion are provided on the lower side of the base; The heating chamber is further provided with a hot air channel facing the receiving tank, and the hot air channel is connected to an air outlet; the exhaust portion is provided on a side away from the air supply direction of the air outlet, or is provided on a side deviated from the air supply direction of the air outlet, and the exhaust portion is connected to the air passage between the receiving tank and the heating chamber, and / or the exhaust portion is connected to the air passage between the receiving tank and the outside of the shell; A heating component is housed in the heating chamber, and the heating component includes a fan and a heating element.

2. The silo according to claim 1, wherein The base is further provided with a wiring groove. The base includes a first side and a second side opposite to each other in a first direction. The wiring groove shrinks and extends from the first side toward the second side.

3. The silo according to claim 2, wherein, The heating chamber and the exhaust portion are arranged closer to the second side than to the first side, and the wiring groove is located between the heating chamber and the exhaust portion.

4. The silo according to claim 1, characterized in that, The air supply direction of the hot air channel is toward the top of the bottom wall of the receiving groove, and the exhaust part includes a connecting cavity and an exhaust port. The connecting cavity is recessed relative to the bottom wall of the receiving groove so that the gas in the receiving groove flows to the connecting cavity. The exhaust port is at least partially toward the bottom of the receiving groove, and the exhaust port connects the connecting cavity and the gap between the base and the shell.

5. The silo according to claim 4, characterized in that, The silo also includes an air valve, an air outlet is opened on the outer shell, an air flow channel is formed between the air outlet and the receiving groove, the air valve is arranged on the air flow channel, and is used to control the conduction or closing of the air flow channel, the receiving groove is located on the upper side of the base, and the air flow channel is located on the lower side of the base.

6. The silo according to claim 5, wherein The outer shell is a hexahedral structure, and the outer shell includes a shell bottom plate and a shell side plate that are connected to each other. The shell side plate is annular and surrounds the outer periphery of the base, and the air outlet is opened on the shell side plate; the air valve is arranged on the side wall of the connecting cavity, or the air valve is arranged in the side wall of the shell side plate facing the connecting cavity; along the direction of the line connecting the exhaust port and the air outlet, the distance between the side wall of the connecting cavity and the shell side plate is 30mm to 50mm.

7. The silo according to claim 6, characterized in that, The air inlet surface of the fan faces away from the bottom wall of the receiving groove; the line B connecting the center point of the fan blade and the center point of the air outlet, and the line C connecting the center point of the fan blade and the center point of the exhaust outlet have an angle β1 on the shell bottom plate, and the angle β1 is 20°~50°.

8. The silo according to claim 6, characterized in that, The air inlet surface of the fan faces away from the bottom wall of the receiving groove; the line B connecting the center point of the fan blade and the center point of the air outlet, and the line K connecting the center point of the fan blade and the center point of the air outlet have an angle β2 on the shell bottom plate, and the angle β2 is 25°~55°.

9. The silo according to claim 6, characterized in that, An air inlet hole is further formed in the outer shell, and an air return opening is formed in the base. The space between the air inlet hole and the air return opening forms an air inlet channel for the blower to intake air from outside the material bin. An air inlet valve for controlling the opening or closing of the air inlet channel is further provided on the air inlet channel; the distance between the center point of the air inlet hole and the center point of the air return opening is 30 mm to 50 mm, and the air inlet valve is arranged on the side wall of the heating cavity, or the air inlet valve is arranged on the inner wall of the shell bottom plate or the shell side plate facing the heating cavity.

10. The silo according to claim 9, characterized in that, The included angle γ between the projection on the shell bottom plate of the connection line C between the center point of the air inlet hole and the center point of the air outlet and the connection line L between the center point of the air inlet hole and the center point of the air outlet hole is 20° to 55°.

11. A 3D printing feeding device, characterized in that, The 3D printing feeding device includes a material tray and the material bin according to any one of claims 1-10. The receiving groove is used to receive the material tray, and the material tray is used to carry the material.

12. A 3D printing device, characterized in that, The 3D printing device includes a 3D printer and the 3D printing feeding device according to claim 11.

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