Tumble dryer

Abstract

The present invention belongs to the technical field of drying equipment, and in particular, relates to a drum dryer, including a shell, an upper cover, a drum, a hot air blower and a driving mechanism, wherein a first installation cavity with an opening facing upward is provided in the shell, and the upper cover is used to cover the mouth of the first installation cavity; the drum is rotatably installed in the first installation cavity, a feeding port is provided on the circumferential side of the drum, and when the drum is in a stationary state, the feeding port faces the mouth of the first installation cavity, and an exhaust hole for communicating with the inside of the drum is provided on the upper cover or the shell; the hot air blower is provided on the outside of the drum, and is used to blow hot air into the drum; the driving mechanism is provided in the first installation cavity, and is used to drive the drum to perform a single pendulum motion. Through the above arrangement, the feeding port and the shell opening can always be in the same position after the drum stops while performing a single pendulum motion, so as to facilitate material removal.

Description

Technical Field

[0001] The invention belongs to the technical field of drying equipment, and in particular relates to a drum drying machine. Background Art

[0002] The dryer is a machine that, under the suction of the fan, converts the fresh cold air outside into dry hot air after heat exchange with the heater through the air inlet, and then exchanges heat with the clothes tumbling in the drum before being discharged from the machine body. The clothes in the drum are gradually evaporated and dried under the action of the dry hot air. At present, dryers are mainly divided into bedroom drum dryers and vertical pulsator washing and drying machines. In the prior art, the clothes are placed in the drum dryer and the drum of the drum dryer is tumbled to turn the clothes in the drum, thereby achieving a comprehensive drying process for the clothes. After the drying operation is completed, the motor stops rotating and the user takes out the foreign objects. However, the drum dryer in the prior art has a technical problem that when the motor stops rotating, the feeding port of the drum and the taking port of the drum dryer shell will not be aligned properly, resulting in inconvenience in taking out the objects. Summary of the invention

[0003] The object of the present invention is to provide a drum drying machine, aiming to solve the technical problem in the prior art that the drying machine is not properly placed when stopped, making it inconvenient to take out items.

[0004] To achieve the above-mentioned purpose, an embodiment of the present invention provides a drum dryer, comprising a shell, an upper cover, a drum, a hot air blower and a driving mechanism, wherein a first installation cavity with an opening facing upward is provided in the shell, and the upper cover is used to cover the mouth of the first installation cavity; the drum is rotatably installed in the first installation cavity, a feeding port is provided on the circumferential side of the drum, and when the drum is in a stationary state, the feeding port faces the mouth of the first installation cavity, and an exhaust hole for communicating with the interior of the drum is provided on the upper cover or the shell; the hot air blower is provided on the outside of the drum for blowing hot air into the drum; the driving mechanism is provided in the first installation cavity for driving the drum to swing.

[0005] Preferably, the drum is rotatably connected in the mounting cavity along a horizontal axis.

[0006] Preferably, the pushing mechanism includes a fixed bracket, an electromagnetic coil and a permanent magnet; the fixed bracket is arranged in the first installation cavity, the electromagnetic coil is arranged on the fixed bracket, and the permanent magnet is arranged on the outside of the roller, or the permanent magnet is arranged on the fixed bracket, and the electromagnetic coil is arranged on the outside of the roller; the electromagnetic coil is energized to form a force with the permanent magnet to push the roller to swing.

[0007] Preferably, mounting supports are oppositely arranged on both sides of the drum, each mounting support has a rotating shaft extending outward, and the rotating shaft is rotatably connected to the inner side of the shell, or is rotatably connected to a mounting plate arranged in the first mounting cavity.

[0008] Preferably, a cover plate covering the mouth of the first mounting cavity is also provided on the top of the shell, and a square hole is provided on the cover plate; an air guide plate in contact with the outer ring of the drum is extended downward along the edge of the square hole at the bottom of the cover plate, and each of the air guide plates forms an air duct, and the feeding port swings in the air duct.

[0009] Preferably, baffle plates extend downward from both side edges of the square hole opening.

[0010] Preferably, an ultraviolet disinfection lamp is also provided on the inner side of the upper cover for disinfecting the objects in the drum.

[0011] Preferably, the upper cover comprises a face cover, a bottom cover and an air guide cover; the face cover and the bottom cover are assembled into a closed second installation cavity, the face cover is provided with an air outlet, the bottom cover is provided with a vent and an air avoidance port for avoiding the ultraviolet disinfection lamp, and the air outlet and the vent are staggered; the air guide cover and the ultraviolet disinfection lamp are arranged in the second installation cavity; the bottom and upper ends of the air guide cover are provided with air guide ports that are interconnected; the opening at the lower end of the air guide cover covers the vent, and the opening at the upper end of the air guide cover covers the air outlet.

[0012] Preferably, the hot air blower includes a constant temperature heater and a fan, the constant temperature heater is fixedly installed on the outside of the roller, and one end of the constant temperature heater extends through the cylinder wall into the drum, and the fan is fixedly installed on the outside of the constant temperature heater, and is used to blow the air heated around the constant temperature heater into the drum.

[0013] Preferably, a deflector is provided on the inner wall of the drum to disperse the hot air into the drum, the deflector wraps the portion of the constant temperature heater located in the drum, and a plurality of heat dissipation holes are provided on the circumferential side of the deflector.

[0014] The above one or more technical solutions in the drum dryer provided by the embodiment of the present invention have at least one of the following technical effects:

[0015] The drum drying machine of the present invention is composed of a shell, an upper cover, a drum, a hot air blower and a driving mechanism. During assembly, a first installation cavity with an opening facing upward is opened in the shell, and then the upper cover is installed on the upper surface of the shell to cover the opening of the first installation cavity, thereby completing the covering of the opening of the first installation cavity. The drum is rotatably installed in the first installation cavity so that the drum can rotate in the first installation cavity. At the same time, a feeding port is opened on the drum. When the drum stops rotating, the feeding port coincides with the opening of the first installation cavity to realize the mutual communication of the two openings. Clothes are put into the drum through the opening of the first installation body and the feeding port, and the hot air blower arranged on the outer wall of the drum blows the clothes in the drum. The pushing mechanism is fixedly mounted on the bottom surface of the first installation cavity, and the drum is driven to perform a simple pendulum motion by the pushing mechanism. The clothes placed in the drum can be moved by the pendulum motion, and the stacked parts can also be heated and dried to avoid the phenomenon that some parts are not dried sufficiently and are still wet. When the drying is completed, the pushing mechanism stops operating, and the drum gradually stops under the action of gravity, and the feeding port gradually overlaps with the opening of the first installation cavity, and the user picks up the clothes. Through the above arrangement, the feeding port and the shell opening can always be in the same position after the drum stops while performing the single pendulum motion, so it is convenient to take out the clothes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 This is a rendering of the drum drying machine provided in an embodiment of the present invention.

[0018] Figure 2 A top view of a drum drying machine provided in an embodiment of the present invention.

[0019] Figure 3 For along Figure 2 Sectional view along line AA.

[0020] Figure 4 A bottom view of an upper cover of a drum drying machine provided in an embodiment of the present invention.

[0021] Figure 5 This is a rendering of the air guide cover of the drum dryer provided in an embodiment of the present invention.

[0022] Figure 6 This is a view of the internal structure of a drum dryer provided in an embodiment of the present invention.

[0023] Among them, the reference numerals in the figure are:

[0024] 10—housing 11—wind guide plate 20—upper cover

[0025] 21—face cover 22—air guide cover 23—ultraviolet disinfection lamp

[0026] 24—bottom cover 30—drum 31—feeding port

[0027] 32—Installation support 40—Hot air blower 41—Constant temperature heater

[0028] 42—Fan 50—Propelling mechanism 51—Electromagnetic coil

[0029] 52—permanent magnet 53—fixed bracket. DETAILED DESCRIPTION

[0030] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the attached Figures 1 to 6 , wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0031] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0034] In one embodiment of the present invention, Figures 1 to 6 As shown, a drum drying machine is provided, including a shell 10, an upper cover 20, a drum 30, a hot air blower 40 and a pushing mechanism 50. A first installation cavity with an opening facing upward is provided in the shell 10, and the upper cover 20 is used to cover the mouth of the first installation cavity; and the bottom edge of the upper cover 20 is rotatably connected to the upper surface edge of the shell 10, and the reversal operation of the upper cover 20 is realized by the rotational connection, which is convenient for opening and closing the upper cover 20, and the drum 30 is rotatably installed in the first installation cavity, so that the drum 30 rotates in the first installation cavity, and the clothes are moved by the rotation. A feeding port 31 is provided on the circumferential side of the drum 30, and the feeding port 31 is provided to facilitate the user to put the clothes into the drum 30 for heating and drying, and when the drum 30 is in a stationary state, the feeding port 31 faces the mouth of the first installation cavity, and the feeding port 31 is located at the highest point of the drum 30 when the drum 30 is in a stationary state. At the same time, the feeding port 31 coincides with the mouth opening of the first installation cavity, so that the mouth of the first installation cavity and the feeding port 31 are communicated with each other. , the user can put the clothes from the mouth of the first installation cavity through the feeding port 31 into the drum 30 to dry and heat the clothes, avoiding the deviation or even misalignment between the position of the mouth of the first installation cavity and the feeding port 31, which makes it inconvenient or impossible to put the clothes. The upper cover 20 or the shell 10 is provided with an exhaust hole for communicating with the inside of the drum 30; by providing the exhaust hole on the upper cover 20 or the shell 10, it is not connected with the inside of the drum 30, so as to realize the flow replacement of the gas in the drum 30 when the drum 30 is not heated and dried. The hot air blower 40 is arranged on the outside of the drum 30 to blow hot air into the drum 30; the hot air blower 40 blows to make the hot air diffuse faster, thereby improving the efficiency of heating and drying. The pushing mechanism 50 is arranged in the first installation cavity, and is used to drive the drum 30 to do a simple pendulum motion. Under the action of the pushing mechanism 50, the drum 30 is made to do a simple pendulum motion, and the clothes placed in the drum 30 are turned over, so as to avoid the poor drying effect and the phenomenon that the middle part of the clothes stacked together is still wet.

[0035] The drum drying machine of the present invention is composed of a shell 10, an upper cover 20, a drum 30, a hot air blower 40 and a pushing mechanism 50. During assembly, a first installation cavity with an opening facing upward is opened in the shell 10, and then the upper cover 20 is installed on the upper surface of the shell 10, so that the upper cover 20 covers the opening of the first installation cavity, and the covering of the opening of the first installation cavity is completed. The drum 30 is rotatably installed in the first installation cavity, so that the drum 30 can rotate in the first installation cavity. At the same time, a feeding port 31 is opened on the drum 30. When the drum 30 stops rotating, the feeding port 31 coincides with the opening of the first installation cavity, so that the two openings are connected to each other. Clothes are put into the drum 30 through the opening of the first installation body and the feeding port 31, and the hot air blower 40 is arranged on the outer wall of the drum 30. The machine 40 blows hot air into the drum 30 to heat and dry the clothes placed in the drum 30. The pushing mechanism 50 is fixedly installed on the bottom surface of the first installation cavity. The pushing mechanism 50 is used to drive the drum 30 to perform a simple pendulum motion. The clothes placed in the drum 30 can be moved through the pendulum motion, and the stacked parts can also be heated and dried to avoid the phenomenon that some parts are not dried sufficiently and are still wet. When the drying is completed, the pushing mechanism 50 stops operating, and the drum 30 gradually stops under the action of gravity, and the feeding port 31 gradually overlaps with the opening of the first installation cavity, and the user picks up the clothes. Through the above arrangement, the drum 30 can make the feeding port 31 and the opening of the shell 10 always in the same position after stopping while performing the pendulum motion, so that it is convenient to take out the clothes.

[0036] In another embodiment of the present invention, Figure 3 and Figure 6 As shown, the drum 30 is rotatably connected in the installation cavity along a horizontal axis, and the central axis of the drum 30 is arranged horizontally, so that the drum 30 can rotate along the horizontal axis. This can ensure that the clothes placed in the drum 30 cannot remain in one position during the rotation of the drum 30, and must be turned over, thereby realizing the movement of the clothes, heating and drying the clothes in all directions, avoiding the phenomenon of partial moisture, and improving the efficiency of heating and drying.

[0037] In another embodiment of the present invention, Figure 3 and Figure 6As shown, the pushing mechanism 50 includes a fixed bracket 53, an electromagnetic coil 51 and a permanent magnet 52; the fixed bracket 53 is arranged in the first installation cavity, and the fixed bracket 53 is fixedly installed at the bottom of the first installation cavity, located below the drum 30, the electromagnetic coil 51 is arranged on the fixed bracket 53, and the permanent magnet 52 is arranged on the outside of the drum 30, or the permanent magnet 52 is arranged on the fixed bracket 53, and the electromagnetic coil 51 is arranged on the outside of the drum 30; the electromagnetic coil 51 and the permanent magnet 52 are relatively installed without fixing the position, which is convenient for the installation work of the installer and improves the assembly efficiency of the drum dryer. The electromagnetic coil 51 is energized, and forms a force with the permanent magnet 52 to push the drum 30 to swing. Because the electromagnetic coil 51 pushes the permanent magnet 52 to move, the permanent magnet 52 drives the drum 30 to rotate, and the permanent magnet 52 falls back after leaving the electromagnetic coil 51 for a certain distance, and moves in the same direction under the action of inertia. The cycle is repeated repeatedly when powered on, so as to achieve the effect of the single pendulum motion of the drum 30.

[0038] In another embodiment of the present invention, Figure 3 and Figure 6 As shown, mounting supports 32 are arranged on both sides of the drum 30, and a mounting support 32 coinciding with the circular diameter is arranged on both sides of the drum 30, so as to avoid directly punching holes on the far side to assemble components, thereby avoiding damage to the cavity or affecting the service life. Both ends of the mounting support 32 are fixedly installed at the edge of the side of the drum 30, so that the connection is more tight, and there will be no breakage or drop of the drum 30 during use. Each mounting support 32 extends outward with a rotating shaft, and the rotating shaft is rotatably connected to the inner side of the shell 10, or is rotatably connected to the mounting plate arranged in the first mounting cavity. Through the setting of the rotating shaft, the drum 30 can be rotated around the central axis, thereby ensuring that the drum 30 will not move in the entire rotation process. The drum 30 is mounted in the shell 10 through the rotating shaft to realize rotation. On the one hand, the drum 30 is more stable, and on the other hand, the position of the drum 30 remains unchanged, which minimizes the internal space requirement of the shell 10, and reduces the volume of the drum dryer as a whole, which is convenient for placement and installation.

[0039] The circumferential side surface of the drum 30 is formed by connecting a plurality of curved surfaces end to end through connecting ribs. The size of the drum 30 can be simply controlled by controlling the number of connected curved surfaces.

[0040] In another embodiment of the present invention, Figure 3As shown, a cover plate covering the mouth of the first installation cavity is also provided at the top of the shell 10, and a square hole is provided on the cover plate; the square hole of the cover plate is further provided to clarify the position for placing the clothes, and at the same time avoid placing the clothes outside the feeding port 31, and an air guide plate 11 in contact with the outer ring of the drum 30 is extended downward along the edge of the square hole at the bottom of the cover plate, and the air guide plate 11 surrounds the circumferential side surface of the top of the drum 30 to prevent the clothes from falling into the first installation cavity when the clothes are placed, and each of the air guide plates 11 forms an air duct, and the feeding port 31 swings in the air duct. The air duct formed by the air guide plate 11 is used to guide the direction of the hot air blown out by the hot air blower 40 on the one hand, and on the other hand, it is used to prevent the clothes in the drum 30 from falling out when the drum 30 is doing a single pendulum motion by controlling the swing amplitude of the drum 30.

[0041] In another embodiment of the present invention, Figure 3 As shown, material baffles extend downward from both side edges of the square hole mouth, and material baffles extend downward from two opposite side edges of the square hole mouth parallel to the central axis of the drum 30, for limiting the position of the clothes to prevent the clothes from falling into the air guide plate 11 area outside the drum 30 when they are placed in the drum 30 and cannot be accurately put into the feeding port 31.

[0042] In another embodiment of the present invention, Figure 3 As shown, an ultraviolet disinfection lamp 23 is also provided on the inner side of the upper cover 20 for disinfecting the objects in the drum 30, and after the upper cover 20 is closed, the ultraviolet disinfection lamp 23 is located within the square hole, and the ultraviolet disinfection lamp 23 is used to disinfect the clothes in the stopped drum 30, thereby achieving a certain sterilization effect on the clothes in the drum 30.

[0043] In another embodiment of the present invention, Figures 1 to 5As shown, the upper cover 20 includes a face cover 21, a bottom cover 24 and an air guide cover 22; the face cover 21 and the bottom cover 24 are assembled to form a complete upper cover 20 shell 10, the face cover 21 and the bottom cover 24 are assembled into a closed second installation cavity, the face cover 21 is provided with an air outlet, the bottom cover 24 is provided with a vent and an air avoidance hole for avoiding the ultraviolet disinfection lamp 23, the air outlet and the vent are arranged to cooperate with the air guide cover 22 to lead out the airflow in the first installation cavity, to ensure the airflow in the first installation cavity, after the upper cover 20 is closed, the air avoidance hole is located above the square hole, so that the ultraviolet rays can achieve maximum power, the air outlet and the vent are staggered; the air outlet and the vent are staggered, when The air outlet is away from the operator's side to prevent the operator from being harmed by the hot air flow coming out of the air outlet, and the air guide cover 22 and the ultraviolet disinfection lamp 23 are arranged in the second installation cavity; the air guide cover 22 and the ultraviolet disinfection lamp 23 are arranged in the second installation cavity, which can effectively make the outer surface of the upper cover 20 neat and flat, and is more convenient for the user to keep the outer surface of the upper cover 20 clean and tidy, and the bottom and upper ends of the air guide cover 22 are provided with air guide ports that are interconnected; the mouth of the lower end of the air guide cover 22 covers the vent, and the mouth of the upper end of the air guide cover 22 covers the air outlet, and the openings on both sides of the air guide cover 22 are respectively connected to the air outlet and the vent, and the airflow entering the vent is guided to the air outlet through the air guide cover 22.

[0044] In another embodiment of the present invention, Figure 3 and Figure 6 As shown, the hot air blower 40 includes a constant temperature heater 41 and a fan 42. The constant temperature heater 41 is fixedly installed on the outside of the roller, and one end of the constant temperature heater 41 extends through the drum wall to the drum 30. The fan 42 is fixedly installed on the outside of the constant temperature heater 41, and is used to blow the air heated around the constant temperature heater 41 into the drum 30. By extending one end of the constant temperature heater 41 through the drum wall into the drum 30, and providing a power for the flow of air through the fan 42 fixedly installed at the other end of the constant temperature heater 41, the airflow heated by the constant temperature heater 41 is blown into the drum 30 at one end of the constant temperature heater 41, so as to achieve heating and drying of the clothes placed in the drum 30.

[0045] In another embodiment of the present invention, Figure 3As shown, a deflector is provided on the inner wall of the drum 30 for dispersing hot air into the drum. The deflector has a circular covering surface and is convexly truncated inside to form a cone shape. The deflector wraps the portion of the constant temperature heater 41 located inside the drum 30, and a plurality of heat dissipation holes are provided on the circumferential side of the deflector. The heat dissipation holes are evenly distributed on the circumferential side of the deflector. The hot air blown from the fan 42 is evenly diffused around the deflector through the heat dissipation holes, thereby improving the diffusion efficiency of the hot air flow, preventing unidirectional diffusion, and further improving the drying efficiency of the drum dryer for the clothes in the drum 30.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A drum drying machine, characterized in that: The invention comprises a shell, an upper cover, a drum, a hot air blower and a driving mechanism, wherein a first installation cavity with an opening facing upward is arranged in the shell, and the upper cover is used to cover the mouth of the first installation cavity; the drum is rotatably installed in the first installation cavity, a feeding port is arranged on the circumferential side surface of the drum, and when the drum is in a stationary state, the feeding port faces the mouth of the first installation cavity, and the feeding port is arranged to overlap with the mouth of the first installation cavity under the action of the gravity of the drum, and an exhaust hole for communicating with the inside of the drum is arranged on the upper cover or the shell; the hot air blower is arranged on the outside of the drum, and is used to blow hot air into the drum; the driving mechanism is arranged in the first installation cavity, and is used to drive the drum to move in a single pendulum motion; The pushing mechanism comprises a fixed bracket, an electromagnetic coil and a permanent magnet; the fixed bracket is arranged in the first installation cavity, the electromagnetic coil is arranged on the fixed bracket, and the permanent magnet is arranged on the outside of the roller, or the permanent magnet is arranged on the fixed bracket, and the electromagnetic coil is arranged on the outside of the roller; the electromagnetic coil is energized to form a force with the permanent magnet to push the roller to swing; An ultraviolet disinfection lamp is also arranged on the inner side of the upper cover for disinfecting the objects in the drum.

2. The drum drying machine according to claim 1, characterized in that: The roller is rotatably connected in the installation cavity along a horizontal axis.

3. The drum drying machine according to any one of claims 1 to 2, characterized in that: Mounting supports are disposed oppositely on both sides of the drum, and each mounting support has a rotating shaft extending outwardly, and the rotating shaft is rotatably connected to the inner side of the shell, or is rotatably connected to a mounting plate disposed in the first mounting cavity.

4. The drum dryer according to claim 1 is characterized in that: a cover plate covering the mouth of the first mounting cavity is also provided on the top of the shell, and a square hole is provided on the cover plate; an air guide plate in contact with the outer ring of the drum is extended downward along the edge of the square hole at the bottom of the cover plate, each of the air guide plates forms an air duct, and the feeding port swings in the air duct.

5. The drum drying machine according to claim 4, characterized in that: baffle plates extend downward from both side edges of the square hole.

6. A drum dryer according to claim 1, and characterized in that: the upper cover comprises a face cover, a bottom cover and an air guide cover; the face cover and the bottom cover are assembled into a closed second installation cavity, the face cover is provided with an air outlet, the bottom cover is provided with a vent and an air avoidance hole for avoiding the ultraviolet disinfection lamp, and the air outlet and the vent are staggered; the air guide cover and the ultraviolet disinfection lamp are arranged in the second installation cavity; the bottom and upper ends of the air guide cover are provided with air guide ports that are interconnected; the opening of the lower end of the air guide cover covers the vent, and the opening of the upper end of the air guide cover covers the air outlet.

7. A drum dryer according to claim 1, characterized in that: the hot air blower includes a constant temperature heater and a fan, the constant temperature heater is fixedly installed on the outside of the drum, and one end of the constant temperature heater extends through the drum wall into the drum, and the fan is fixedly installed on the outside of the constant temperature heater to blow the air heated by the constant temperature heater into the drum.

8. The drum drying machine according to claim 7, characterized in that: The inner wall of the drum is provided with a deflector for dispersing hot air into the drum. The deflector wraps the portion of the constant temperature heater located in the drum, and a plurality of heat dissipation holes are provided on the circumferential side of the deflector.

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