Kitchen waste machine provided with dual drying systems

Abstract

A kitchen waste machine provided with dual drying systems, said machine comprising a main body (1), a drying cavity (11) being encircled and formed within the main body; a drying cylinder (2), which is provided in the drying cavity (11), the two being detachably connected, and the drying cylinder (2) being used for containing kitchen waste; a top cover (3), which is provided at the top of the main body (1) and is used for closing top openings of the main body (1) and the drying cylinder (2); a first gas passage (41), one end of the first gas passage being in communication with the top opening of the drying cylinder (2), and the other end being in communication with the outside so as to introduce gas from the outside into the drying cylinder (2); a first heating assembly (5), which is provided in the top cover (3) and is used for heating the gas introduced by the first gas passage (41); and a second heating assembly (6), which is provided on the side of the drying cylinder (2) away from the top cover (3) and is used for providing heat into the drying cylinder (2) so as to heat the kitchen waste.

Description

A double drying system food waste machine Technical Field

[0001] The present application relates to the technical field of kitchen waste equipment, and in particular to a kitchen waste machine with a dual drying system. Background Art

[0002] The food waste disposers currently on the market generally take about 8 hours to process food waste, and the fastest ones take 6 hours. The processing time is quite slow. At the same time, it cannot automatically shut down after the waste processing is completed, so during processing, it is necessary to always observe its processing progress, which is quite painful for users.

[0003] For example, the Chinese utility model patented food waste disposer, with publication number CN216204756U, includes a housing with a hot air duct having an air outlet; a processing bucket disposed within the housing and connected to the air outlet. The processing bucket includes a first area for processing wet waste and a second area for storing dry waste. The first area is located in the hot air flow path and near the air outlet. The first area can be moved by external force to deposit the dried wet waste into the second area. This solution cannot effectively dry food waste, and the processing time is long.

[0004] Utility Model Content

[0005] In response to the above technical problems, the purpose of the embodiments of the present application is to provide a dual-drying system food waste machine to solve the problem of low drying efficiency of current food waste machines.

[0006] The purpose of the embodiments of the present application is to provide a dual-drying system food waste machine, comprising:

[0007] The main body has a drying chamber formed therein;

[0008] A drying drum is provided in the drying chamber and the two are detachably connected, and the drying drum is used to hold kitchen waste;

[0009] a top cover, which is provided on the top of the main body and is used to close the main body and the top opening of the drying drum;

[0010] a first air duct, one end of which is connected to the top opening of the drying drum and the other end of which is connected to the outside, for introducing external air into the drying drum;

[0011] a first heating assembly, disposed in the top cover, for heating the gas introduced through the first air duct;

[0012] The second heating component is arranged on a side of the drying drum away from the top cover, and is used for providing heat into the drying drum to heat the kitchen waste.

[0013] As an optional embodiment, the dual drying system food waste machine further includes:

[0014] The second air duct has one end that passes through the main body and the other end that extends upward along the main body to the drying chamber, allowing the heated air in the drying drum to enter the second air duct through the gap between the top cover and the drying drum and be discharged. External air enters the top cover through the first air duct, is heated by the first heating element, and then enters the drying drum. Simultaneously, the second heating element provides heat to the drying drum, facilitating the heating of food waste in the drying drum. This allows the high-temperature and high-humidity air to be discharged through the second air duct, achieving effective heating and high processing efficiency.

[0015] As an optional embodiment, a mounting cavity is provided between the main body and the drying chamber, and the first and second air ducts are respectively provided on opposite sides of the mounting cavity. The layout of the first and second air ducts rationally utilizes the space in the mounting cavity, making the structure of the device compact without affecting the performance of different components.

[0016] As an optional embodiment, the dual drying system food waste machine further includes:

[0017] The crushing component is arranged in the drying drum and is used for crushing the kitchen waste entering the drying drum.

[0018] As an optional embodiment, the crushing assembly includes:

[0019] A cutting knife, which is provided on the inner wall of the drying cylinder;

[0020] a stirring paddle, which is arranged inside the drying drum and cooperates with the cutting blade to chop the kitchen waste;

[0021] The anti-sticking device is located on the side of the stirring paddle near the inner bottom of the drying drum to prevent food waste from sticking to the inner bottom of the drying drum. The cutting blade and stirring paddle work together to shred the food waste. During the shredding process, the anti-sticking device always maintains contact with the bottom of the drying drum, preventing food waste from sticking to the inner bottom of the drying drum and reducing the subsequent cleaning workload.

[0022] As an optional embodiment, the dual-drying system food waste machine further includes a driver, which is disposed in the lower portion of the mounting cavity and connected to the stirring paddle via a connector to provide power. This application rationally utilizes the structure of the mounting cavity to rationally arrange the various components within the mounting cavity, eliminating the need for additional space and facilitating assembly.

[0023] As an optional embodiment, the stirring paddle includes:

[0024] A mounting portion, which is sleeved on a positioning sleeve in the drying drum;

[0025] A stirring portion is arranged in multiple layers from top to bottom along the outer wall of the mounting portion so that the blade of the cutting knife is located between the multiple layers of the stirring portion;

[0026] A paddle shaft is inserted into the positioning sleeve, with a bearing disposed between the paddle shaft and the positioning sleeve. The lower end of the paddle shaft is connected to the connector to retain the mounting portion on the positioning sleeve. A driver and the connector rotate the paddle shaft, thereby rotating the stirring portion to stir and chop the food waste while enhancing effective contact between the food waste and the hot gas.

[0027] As an optional embodiment, the first heating component includes a first heating element and a first fan. A mounting position is provided on one side of the top cover. The first fan and the first heating element are arranged in sequence along the gas flow direction in the mounting position. An air outlet is provided at one end of the mounting position and the end extends into the drying cylinder so that the heated gas can directly enter the drying cylinder through the air outlet.

[0028] As an optional embodiment, the second heating component includes:

[0029] a bracket, connected to the cavity wall of the installation cavity and the driver respectively;

[0030] a second heating element, which is provided on the bracket and contacts the bottom surface of the drying drum to provide heat to the drying drum;

[0031] The heat insulation pad is respectively arranged between the second heating element and the bracket and between the bracket and the driver to prevent heat transfer. The second heating component is arranged in the installation cavity, and the layout of each component is reasonable, so that the second heating component can provide heat to the drying drum.

[0032] As an optional embodiment, the dual-drying system food waste machine further includes an exhaust component and a controller, and the exhaust component includes:

[0033] a fan, disposed in the second air duct, for introducing the gas in the drying drum into the second air duct;

[0034] a second blower connected to the fan and disposed in the mounting cavity, for providing power to the fan;

[0035] a temperature and humidity sensor, which is provided in the second air duct and upstream of the second air duct along the gas flow direction, and is used to detect temperature and humidity information in the drying drum;

[0036] a filter disposed in the second air duct and downstream of the second air duct along the gas flow direction, for filtering the heated gas in the drying drum;

[0037] A controller is provided on the top cover, and the controller is respectively connected to the first fan, the second fan, the driver, the first heating element, the second heating element and the temperature and humidity sensor. The controller is used to receive the temperature and humidity information and control the start and stop of the first fan, the second fan, the driver, the first heating element and the second heating element, making it more convenient and intelligent to use.

[0038] The beneficial effects of the embodiments of the present application are:

[0039] The present invention has a rational structural design. The first and second heating components heat the food waste in the drying drum, and the pulverizing component is combined to pulverize the food waste, which is beneficial to improving the drying effect and saving drying time. In addition, the present invention is easy to use. The temperature and humidity sensors control the start and stop of the food waste machine, making it more intelligent and automated, and solving the problem of high energy consumption of the food waste machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] FIG1 is a schematic structural diagram of an embodiment of the present application;

[0041] FIG2 is a schematic structural diagram of the main body and the top cover of an embodiment of the present application;

[0042] FIG3 is a schematic structural diagram of a drying drum according to an embodiment of the present application;

[0043] FIG4 is a schematic diagram of food waste treatment in an embodiment of the present application;

[0044] FIG5 is a schematic diagram of the kitchen waste after processing according to an embodiment of the present application.

[0045] Figure markings: 1. Main body; 11. Drying chamber; 12. Installation chamber; 2. Drying cylinder; 21. Positioning sleeve; 3. Top cover; 31. Installation position; 32. Air outlet; 41. First air duct; 42. Second air duct; 5. First heating component; 51. First heating element; 52. First fan; 6. Second heating component; 61. Bracket; 62. Second heating element; 63. Insulation pad; 7. Crushing component; 71. Cutting knife; 72. Stirring paddle; 721. Installation part; 722. Stirring part; 723. Paddle shaft; 73. Anti-sticking device; 8. Drive; 81. Connector; 9. Exhaust component; 91. Fan; 92. Second fan; 93. Temperature and humidity sensor; 94. Filter; 10. Controller. DETAILED DESCRIPTION

[0046] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0047] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but merely as an example of an embodiment. Other modifications within the scope and spirit of the present application will occur to those skilled in the art.

[0048] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0049] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0050] It should also be understood that although the present application has been described with reference to certain specific examples, those skilled in the art will readily be able to implement many other equivalent forms of the present application.

[0051] The above and other aspects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0052] Specific embodiments of the present application will be described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments described are merely examples of the present application and may be implemented in a variety of ways. Familiar and / or repetitive functions and structures are not described in detail to avoid obscuring the present application with unnecessary or redundant details. Therefore, the specific structural and functional details described herein are not intended to be limiting, but rather serve merely as a basis and representative basis for the claims to teach those skilled in the art to variously utilize the present application with substantially any suitable detailed structure.

[0053] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may all refer to one or more of the same or different embodiments according to the present application.

[0054] The purpose of the embodiment of the present application is to provide a dual-drying system food waste machine, as shown in Figure 1, including a main body 1, a drying drum 2, a top cover 3, a first air duct 41, a first heating component 5, a second heating component 6 and a second air duct 42.

[0055] As shown in Figure 1, the main body 1 defines a drying chamber 11. The drying drum 2 is removably mounted within the drying chamber 11 and is used to store food waste. A top cover 3 is mounted on the top of the main body 1 to seal the top openings of the main body 1 and the drying drum 2. The top cover 3 is rotatably mounted on the main body 1 via a rotating shaft. A sealing gasket is provided at the connection between the top cover 3 and the main body 1 to ensure a tight seal during use.

[0056] One end of the first air duct 41 is connected to the top opening of the drying drum 2, and the other end is connected to the outside world, for introducing external air into the drying drum 2. Specifically, one end of the first air duct 41 passes through the main body 1, and the other end extends upward along the main body 1 to the side of the top cover 3, for introducing external air into the top cover 3. In other words, the first air duct 41 consists of two sections: one section is located in the main body 1, and the other section is located in the top cover 3, and the two sections are interconnected.

[0057] The first heating component 5 is provided in the top cover 3 for heating the air introduced by the first air duct 41. The first heating component is provided above the drying drum 2 to solve the problem that cold air affects the drying efficiency of the drying drum 2.

[0058] The second heating component 6 is disposed on a side of the drying drum 2 away from the top cover 3 and is used to provide heat into the drying drum 2 to heat the kitchen waste.

[0059] As an optional embodiment, the dual-drying system food waste machine further includes a second air duct 42. One end of the second air duct 42 passes through the main body 1, and the other end extends upward along the main body 1 to the drying chamber 11. This allows the heated gas in the drying drum 2 to enter the second air duct 42 through the gap between the top cover 3 and the drying drum 2 and be discharged. The second air duct 42 is an outlet duct and may also adopt other structures that can achieve the desired air outlet effect.

[0060] The present application provides a first heating component above the drying drum 2 to ensure that the air entering the drying drum 2 is hot air. A second heating component is provided at the bottom of the drying drum 2 so that the second heating component is in direct contact with the bottom of the drying drum 2 to transfer heat to heat the food waste in the drying drum 2.

[0061] During use, the external cold air enters the top cover 3 through the first air duct 41, and then is heated by the first heating component 5 to become hot gas to enter the drying drum 2. At the same time, the second heating component 6 provides heat to the drying drum 2, which is convenient for heating the kitchen waste in the drying drum 2, and then the high-temperature and high-humidity gas is discharged through the second air duct 42, with good heating effect and high processing efficiency.

[0062] As an optional embodiment, as shown in FIG2 , a mounting chamber 12 is provided between the main body 1 and the drying chamber 11, and the first air duct 41 and the second air duct 42 are respectively provided on opposite sides of the mounting chamber 12. Furthermore, the cavity wall shared by the mounting chamber 12 and the drying chamber 11 is made of a heat-insulating layer to isolate heat transfer between the drying drum 2 and the main body 1.

[0063] As an optional embodiment, the dual-drying system food waste machine further includes a crushing assembly 7, which is disposed in the drying drum 2 and is used to crush the food waste entering the drying drum 2. The crushing assembly 7 includes a cutting blade 71, a stirring paddle 72, and an anti-sticking device 73.

[0064] The cutting blade 71 is located on the inner wall of the drying drum 2, and the stirring paddle 72 is located inside the drying drum 2 and cooperates with the cutting blade 71 to chop the food waste. The anti-sticking device 73 is located on the side of the stirring paddle 72 near the inner bottom surface of the drying drum 2 to prevent the food waste from sticking to the inner bottom surface of the drying drum 2. The anti-sticking device 73 uses anti-sticking ribs to prevent glue from sticking to the bottom of the drying drum 2.

[0065] As an optional embodiment, the dual-drying system food waste machine further includes a driver 8 , which is disposed in the lower portion of the installation cavity 12 and is connected to the stirring paddle 72 via a connector 81 to provide power.

[0066] As an optional embodiment, as shown in FIG3 , the stirring paddle 72 includes a mounting portion 721 , a stirring portion 722 and a paddle shaft 723 .

[0067] The mounting portion 721 is sleeved on the positioning sleeve 21 in the drying drum 2 , and the stirring portion 722 is arranged in multiple layers from top to bottom along the outer wall of the mounting portion 721 , so that the blade of the cutting knife 71 is located between the multiple layers of the stirring portion 722 .

[0068] The paddle shaft 723 is inserted into the positioning sleeve 21 , a bearing is provided between the paddle shaft 723 and the positioning sleeve 21 , and the lower end of the paddle shaft 723 is connected to the connector 81 to limit the mounting portion 721 on the positioning sleeve 21 .

[0069] During installation, fix the cutting knife 71 on the inner wall of the drying cylinder 2, loosely install the handle provided on the drying chamber 11 in the hole of the drying cylinder 2, then tightly fit the bearing into the positioning sleeve 21 of the drying cylinder 2, and fix the stirring paddle 72 to the paddle shaft 723 and insert it into the inner hole of the bearing, and finally connect the connector 81 to the paddle shaft 723.

[0070] As an optional embodiment, the first heating component 5 includes a first heating element 51 and a first fan 52. A mounting position 31 is provided on one side of the top cover 3. The first fan 52 and the first heating element 51 are arranged in sequence in the mounting position 31 along the direction of gas flow. An air outlet 32 ​​is provided at one end of the mounting position 31 and the end extends into the drying cylinder 2, so that the heated gas can directly enter the drying cylinder 2 through the air outlet 32.

[0071] As an optional embodiment, as shown in FIG2 , the second heating assembly 6 includes a bracket 61 , a second heating element 62 and a thermal insulation pad 63 .

[0072] The bracket 61 is connected to the wall of the mounting cavity 12 and the driver 8, respectively. The second heating element 62 is disposed on the bracket 61 and contacts the bottom surface of the drying drum 2 to provide heat to the drying drum 2. The thermal insulation pad 63 is disposed between the second heating element 62 and the bracket 61, and between the bracket 61 and the driver 8, respectively, to prevent heat transfer.

[0073] During installation, fix the connector 81 on the driver 8, place one of the thermal insulation pads 63 on the driver 8, place the bracket 61 on one of the thermal insulation pads 63, fix the driver 8 and the bracket 61 with screws, place the other thermal insulation pad 63 on the bracket 61, place the second heating element 62 on the other thermal insulation pad 63, and fix the third heating element to the bracket 61 with screws.

[0074] As an optional embodiment, as shown in FIG1 , the dual-drying system food waste machine further includes an exhaust component 9 and a controller 10 . The exhaust component 9 includes a fan 91 , a second fan 92 , a temperature and humidity sensor 93 , and a filter 94 .

[0075] The fan 91 is disposed within the second air duct 42 and is used to draw air from the drying drum 2 into the second air duct 42. The second blower 92 is connected to the fan 91 and disposed within the mounting cavity 12 to provide power to the fan 91. Separating the second blower 92 from the second air duct 42 solves the problem of the second blower 92 being unable to operate for extended periods of time in high-temperature and high-humidity environments.

[0076] The temperature and humidity sensor 93 is arranged in the second air duct 42 and is located upstream of the second air duct 42 along the air flow direction, and is used to detect the temperature and humidity information in the drying drum 2. The temperature and humidity sensor 93 is arranged in the second air duct 42 to solve the problem that the machine cannot automatically stop after drying.

[0077] The filter 94 is disposed in the second air duct 42 and is located downstream of the second air duct 42 along the air flow direction, and is used to filter the heated air in the drying drum 2. A filter medium is disposed in the filter 94.

[0078] During installation, the fan 91 is rotatably mounted within the second air duct 42, and the second blower 92 is mounted outside the second air duct 42. The second blower 92 drives the fan 91, and the temperature and humidity sensor 93 is inserted and fixed to the second air duct 42. The second air duct 42 is installed in the installation cavity 12, and the exhaust assembly and filter 94 are fixed to the cavity wall shared by the installation cavity 12 and the drying cavity 11.

[0079] The controller 10 is arranged on the top cover 3, and the controller 10 is respectively connected to the first fan 52, the second fan 92, the driver 8, the first heating element 51, the second heating element 62 and the temperature and humidity sensor 93. The controller 10 is used to receive the temperature and humidity information and control the start and stop of the first fan 52, the second fan 92, the driver 8, the first heating element 51 and the second heating element 62.

[0080] As shown in Figures 2, 4 and 5, when using this device, open the top cover 3, pour the kitchen waste to be processed into the drying drum 2, close the top cover 3, start the kitchen waste machine through the controller 10, and the kitchen waste machine starts working.

[0081] The first and second heating components begin heating, and the first fan 52 starts operating, drawing cold air from the outside into the top cover 3 through the first air duct 41. The cold air is converted into hot air as it passes through the first heating element 51 and transported into the drying drum 2, where it dries the food waste from the top. Simultaneously, the second heating element 62 directly contacts the bottom of the drying drum 2, transferring heat to heat the bottom of the drying drum 2, thereby drying the food waste inside.

[0082] Moreover, the paddle shaft 723 rotates under the drive of the driver 8, so that the stirring paddle 72 and the cutting knife 71 work together to cut and crush the kitchen waste, accelerate the evaporation of water in the kitchen waste, and improve the drying efficiency.

[0083] During the drying process, the fan 91, under the action of the second blower 92, discharges the high-temperature and high-humidity air in the drying drum 2, passes through the filter 94, and filters the odor in the high-temperature and high-humidity air before discharging it.

[0084] Also, during operation, the temperature and humidity sensor 93 detects the humidity and temperature in the high-temperature and high-humidity gas at any time. When the humidity in the gas is detected to be lower than the set value of the food waste machine, it means that the food waste has been dried and the food waste machine automatically stops.

[0085] The above embodiments are merely exemplary embodiments of the present application and are not intended to limit the scope of the present application. The scope of protection of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and scope of protection of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present application.

Claims

1. A double drying system food waste machine, characterized in that: include: A main body (1) having a drying chamber (11) formed therein; A drying cylinder (2), which is arranged in the drying chamber (11) and the two are detachably connected, and the drying cylinder (2) is used to hold kitchen waste; A top cover (3) is arranged on the top of the main body (1) and is used to close the top openings of the main body (1) and the drying cylinder (2); A first air duct (41), one end of which is in communication with the top opening of the drying cylinder (2) and the other end of which is in communication with the outside, for introducing external air into the drying cylinder (2); a first heating assembly (5), which is disposed in the top cover (3) and is used to heat the gas introduced through the first air duct (41); A second heating component (6) is arranged on a side of the drying drum (2) away from the top cover (3) and is used to provide heat into the drying drum (2) to heat the kitchen waste.

2. The double drying system food waste machine according to claim 1, characterized in that: The double drying system food waste machine also includes: A second air duct (42) has one end that passes through the main body (1) and the other end that extends upward along the main body (1) to the drying chamber (11), so that the heated gas in the drying cylinder (2) enters the second air duct (42) through the gap between the top cover (3) and the drying cylinder (2) and is discharged.

3. The double drying system food waste machine according to claim 2, characterized in that: An installation cavity (12) is provided between the main body (1) and the drying cavity (11), and the first air duct (41) and the second air duct (42) are respectively provided on two opposite sides of the installation cavity (12).

4. The double drying system food waste machine according to claim 3, characterized in that: The double drying system food waste machine also includes: A crushing assembly (7) is arranged in the drying cylinder (2) and is used for crushing the kitchen waste entering the drying cylinder (2).

5. The double drying system food waste machine according to claim 4, characterized in that: The crushing assembly (7) comprises: A cutting knife (71) disposed on the inner wall of the drying cylinder (2); a stirring paddle (72), which is arranged inside the drying cylinder (2) and cooperates with the cutting knife (71) to chop the kitchen waste; The anti-sticking device (73) is arranged on the side of the stirring paddle (72) close to the inner bottom surface of the drying cylinder (2) and is used to The purpose is to prevent the kitchen waste from adhering to the inner bottom surface of the drying cylinder (2).

6. The double drying system food waste machine according to claim 5, characterized in that: The dual-drying system food waste machine also includes a driver (8), which is arranged in the lower part of the installation cavity (12) and is connected to the stirring paddle (72) through a connector (81) to provide power.

7. The double drying system food waste machine according to claim 6, characterized in that: The stirring paddle (72) comprises: A mounting portion (721) which is sleeved on a positioning sleeve (21) in the drying cylinder (2); A stirring portion (722) is arranged in multiple layers from top to bottom along the outer wall of the mounting portion (721), so that the blade of the cutting knife (71) is located between the multiple layers of the stirring portion (722); A paddle shaft (723) is inserted into the positioning sleeve (21), a bearing is arranged between the paddle shaft (723) and the positioning sleeve (21), and the lower end of the paddle shaft (723) is connected to the connector (81) to limit the mounting portion (721) on the positioning sleeve (21).

8. The double drying system food waste machine according to claim 1, characterized in that: The first heating component (5) comprises a first heating element (51) and a first fan (52); a mounting position (31) is provided on one side of the top cover (3); the first fan (52) and the first heating element (51) are arranged in sequence in the mounting position (31) along the gas flow direction; an air outlet (32) is provided at one end of the mounting position (31) and the end extends into the drying cylinder (2), so that the heated gas directly enters the drying cylinder (2) through the air outlet (32).

9. The double drying system food waste machine according to claim 6, characterized in that: The second heating component (6) comprises: A bracket (61) connected to the cavity wall of the installation cavity (12) and the driver (8) respectively; a second heating element (62) which is arranged on the support (61) and in contact with the bottom surface of the drying cylinder (2) to provide heat to the drying cylinder (2); A heat insulation pad (63) is respectively arranged between the second heating element (62) and the bracket (61) and between the bracket (61) and the driver (8) to prevent heat transfer.

10. The double drying system food waste machine according to claim 9, characterized in that: The dual drying system food waste machine further comprises an exhaust component (9) and a controller, wherein the exhaust component (9) comprises: a fan (91), which is arranged in the second air duct (42) and is used to introduce the gas in the drying cylinder (2) into the second air duct (42); a second fan (92), connected to the fan (91) and disposed in the mounting cavity (12), and used for providing power to the fan (91); A temperature and humidity sensor (93) is disposed in the second air duct (42) and is located along the gas flow direction. upstream of the second air duct (42), used to detect temperature and humidity information in the drying cylinder (2); a filter (94), which is arranged in the second air duct (42) and is located downstream of the second air duct (42) along the gas flow direction, and is used to filter the heated gas in the drying cylinder (2); A controller (10) is arranged on the top cover (3); the controller (10) is respectively connected to the first fan (52), the second fan (92), the driver (8), the first heating element (51), the second heating element (62) and the temperature and humidity sensor (93); the controller (10) is used to receive the temperature and humidity information and control the start and stop of the first fan (52), the second fan (92), the driver (8), the first heating element (51) and the second heating element (62).

Images