Clothes dryer

Abstract

The application belongs to the technical field of clothes processing, and particularly relates to a clothes dryer, which aims to solve the problem that the humidity sensor of the clothes dryer in the prior art only contacts with clothes wrapped outside, resulting in inaccurate detection of humidity. The clothes dryer is characterized in that a mounting column is arranged at the bottom of the drum, the mounting column extends into the drum, and the length of the mounting column is 0.3-0.5 times the size of the drum in the axial direction, so that the second end of the mounting column can extend into the inside of clothes wrapped into a bundle; and the inner wall of the drum and the second end of the mounting column are respectively provided with a first humidity sensor and a second humidity sensor, when the moisture contents detected by the first humidity sensor and the second humidity sensor are both lower than a preset limit value, the controller determines that the clothes wrapped outside and the clothes wrapped inside are both dried, and then controls the heating device to stop heating, thereby ensuring that the clothes dryer ends the drying program only after the clothes are completely dried, so that the clothes taken out by the user are completely dried.

Description

Technical Field

[0001] This application belongs to the field of clothing processing technology, specifically relating to a clothes dryer. Background Technology

[0002] Clothes dryers are widely used because they can remove moisture from clothes after washing and spinning.

[0003] In related technologies, a clothes dryer typically includes a casing and a rotatable drum installed inside the casing. The drum is used to hold clothes, and a humidity sensor is installed on the inner wall of the drum. The humidity sensor contacts the clothes to detect the humidity of the clothes, and the clothes dryer determines whether the clothes are dry based on the humidity detected by the humidity sensor.

[0004] However, as the drum rotates, the clothes inside the drum easily get tangled together. At this time, the humidity sensor can only contact the clothes that are tangled on the outside of the clump of clothes. Since the clothes that are tangled on the outside are easy to dry, the detected humidity is inaccurate, which makes the dryer unable to accurately determine whether the clothes are dry. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, specifically the issue that the humidity sensor in existing dryers only contacts the clothes wrapped around the outside, leading to inaccurate humidity detection, this application provides a dryer comprising: a heating device, a drum, a mounting column, a first humidity sensor, a second humidity sensor, and a controller. The drum is used to hold clothes; the heating device is used to dry the clothes inside the drum; the first end of the mounting column is securely connected to the bottom of the drum, and the second end of the mounting column extends into the drum. The central axis of the mounting column is collinear with the axis of the drum, and the distance between the second end of the mounting column and the bottom of the drum is 0.3 to 0.5 times the depth of the drum; the first humidity sensor is mounted on the inner wall of the drum, and the second humidity sensor is mounted on the second end of the mounting column. The controller is electrically connected to both the first and second humidity sensors. When the humidity detected by both the first and second humidity sensors is less than a preset limit, the controller controls the heating device to stop operating.

[0006] In one possible implementation, the mounting post is conical, and the diameter of the first end of the mounting post is larger than the diameter of the second end of the mounting post.

[0007] In one possible implementation, a second humidity sensor is provided, and the second humidity sensor is disposed at the end of the second end of the mounting post.

[0008] In one possible implementation, the second humidity sensor is provided in multiple ways, and the controller controls the heating device to stop operating when the humidity detected by the first humidity sensor and all the second humidity sensors is less than a preset limit.

[0009] In one possible implementation, one of the plurality of second humidity sensors is disposed at the end of the second end of the mounting post, and the remaining second humidity sensors are disposed at intervals around the central axis of the mounting post on the outer surface of the second end of the mounting post.

[0010] In one possible implementation, the first end of the mounting column is connected to a mounting enclosure, which is fastened to the bottom of the roller.

[0011] The drum has multiple air inlets at its bottom and an air outlet at its opening. The heating device includes an air duct, a fan, and a heat exchange system. The air inlet of the air duct is connected to the air outlet of the drum, and the air outlet of the air duct is connected to the air inlet of the drum. The fan drives air to flow within the air duct and the drum, and the heat exchange system heats the air flowing through the air duct.

[0012] In one possible implementation, the mounting wall defines a cavity, within which a connecting post is provided. One end of the connecting post is connected to the mounting wall, and the other end of the connecting post is securely connected to the bottom of the roller.

[0013] In one possible implementation, the mounting enclosure is in the shape of a hollow frustum, and the cross-sectional area of ​​the mounting enclosure along the central axis of the mounting column gradually decreases from the end furthest from the mounting column to the end closest to the mounting column.

[0014] In one possible implementation, a plurality of reinforcing ribs are protruding from the side wall of the connecting column, the reinforcing ribs extending along the length of the connecting column, and one end of the reinforcing ribs being connected to the mounting enclosure.

[0015] In one possible implementation, the distance between the second end of the mounting post and the bottom of the cylinder is greater than or equal to 10 cm and less than or equal to 15 cm.

[0016] Those skilled in the art will understand that the dryer of this application embodiment, by setting an installation post at the bottom of the drum, with the installation post extending into the drum and the length of the installation post being 0.3 to 0.5 times the dimension of the drum in its axial direction, allows the second end of the installation post to extend into the inside of the tangled clothes; and a first humidity sensor and a second humidity sensor are respectively set on the inner wall of the drum and the second end of the installation post. When the moisture content detected by the first humidity sensor and the second humidity sensor is lower than a preset limit, the controller determines that the clothes tangled on the outside and the clothes tangled inside are both dry, and then controls the heating device to stop heating, thereby ensuring that the dryer ends the drying program only after the clothes are completely dry, which helps to ensure that the clothes taken out by the user are completely dry. Attached Figure Description

[0017] A preferred embodiment of the clothes dryer according to the present application will now be described with reference to the accompanying drawings. The drawings are as follows:

[0018] Figure 1 This is a schematic diagram of the structure of a clothes dryer according to an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the structure of the drum in the dryer according to an embodiment of this application;

[0020] Figure 3 This is a cross-sectional view of the drum in the dryer according to an embodiment of this application;

[0021] Figure 4 This is a cross-sectional view of the drum in the dryer according to an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the dryer according to an embodiment of this application;

[0023] Figure 6 This is a schematic diagram of the mounting column in the dryer according to an embodiment of this application;

[0024] Figure 7 This is an exploded view of the roller and mounting column in the dryer according to an embodiment of this application.

[0025] In the attached image:

[0026] 100: Clothes dryer;

[0027] 10: Chassis;

[0028] 20: Drum; 21: Air inlet;

[0029] 30: Mounting column; 31: Mounting enclosure; 32: Connecting column; 33: Reinforcing rib; 34: Second humidity sensor;

[0030] 40: Heating device; 41: Air duct; 410: First part; 411: Second part; 42: Heat exchange system; 420: Condenser; 421: Evaporator; 422: Compressor; 43: Fan;

[0031] 50: Screw. Detailed Implementation

[0032] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0033] Secondly, it should be noted that in the description of this application, the terms "inner" and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is merely for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0034] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] As described in the background section, some existing dryers have humidity sensors located on the inner wall of the drum. The dryer determines whether the clothes are dry based on the humidity detected by this sensor. If the clothes are dry, the drying program stops; if not, it continues. A problem with existing dryers is that clothes easily tangle inside the drum. Clothes tangled on the outside dry easily, while those tangled inside remain damp and difficult to dry, resulting in different humidity levels and drying conditions between the inside and outside of the tangled clothes. Furthermore, the humidity sensor can only contact the clothes tangled on the outside. When the sensor detects low moisture content and the dryer concludes the drying program, the clothes tangled inside are often not completely dry, resulting in the user removing clothes that are not fully dried.

[0036] To address the aforementioned issues, researchers conceived of incorporating a humidity sensor to detect the moisture content of the clothes tangled in the middle. The dryer would only determine that the clothes are completely dry and end the drying process when the sensor detects low moisture content in both the outer and inner garments. Based on this, the researchers ultimately devised a solution: adding a mounting post to the center of the drum's bottom. One end of the post could extend roughly into the center of the drum. The humidity sensor was mounted on one end of this post. When the clothes were tangled, the post could reach into the middle of the tangled garments, allowing the humidity sensor to detect the moisture content of the clothes tangled inside.

[0037] Figure 1 This is a schematic diagram of the structure of a clothes dryer 100 according to an embodiment of this application. Please refer to... Figure 1 This application provides a clothes dryer 100, which specifically includes a housing 10, a drum 20, and a heating device 40. The housing 10 protects the drum 20 and the heating device 40. The heating device 40 is used to dry the clothes inside the drum 20. The drum 20 is rotatably disposed inside the housing 10 and is used to hold clothes. The drum 20 also has a drum opening for clothes to be put in or taken out.

[0038] A first humidity sensor is installed on the inner wall of the drum 20. This sensor detects the moisture content of the clothing to determine its humidity and drying condition. The first humidity sensor can be located on the inner wall at the bottom of the drum 20 or at the opening of the drum 20; this embodiment does not impose any limitation on this. It should be noted that because the first humidity sensor is located on the inner wall of the drum 20, when the clothing inside the drum 20 becomes tangled, the sensor can come into contact with the clothing tangled on the outside, primarily for detecting the moisture content of this tangled clothing.

[0039] Figure 2 This is a schematic diagram of the structure of the drum 20 in the dryer 100 according to an embodiment of this application. Figure 3 This is a cross-sectional view of the drum 20 in the dryer 100 according to an embodiment of this application. Figure 4 This is a cross-sectional view of the drum 20 in the dryer 100 according to an embodiment of this application. Please refer to... Figures 2 to 4The dryer 100 also includes a mounting post 30. The first end of the mounting post 30 is securely connected to the bottom of the drum 20, and the second end of the mounting post 30 extends into the drum 20. The central axis of the mounting post 30 is collinear with the axis of the drum 20. That is, the extension direction of the mounting post 30 is parallel to the axial direction of the drum 20, and the mounting post 30 is fixed at the center of the bottom of the drum 20. A second humidity sensor 34 is also mounted on the second end of the mounting post 30. Furthermore, along the axial direction of the drum 20, the distance L1 between the second end of the mounting post 30 and the bottom of the drum 20 is 0.3 to 0.5 times the depth L2 of the drum 20, so that the second humidity sensor 34 can be located at the center of the drum 20.

[0040] Thus, when the clothes inside the roller 20 become tangled, they will wrap around the mounting post 30, allowing the second end of the mounting post 30 to extend into the tangled clothes, thereby enabling the second humidity sensor 34 to detect the moisture content of the clothes inside.

[0041] Here, the depth L2 of the drum 20 refers to the distance between the bottom of the drum 20 and the opening of the drum 20 along the axial direction. It should be noted that if the distance L1 between the second end of the mounting post 30 and the bottom of the drum 20 is 0.5 times the depth of the drum 20, then the length L1 of the mounting post 30 is half the dimension L2 of the drum 20 along its axial direction. In this case, the second end of the mounting post 30 extends to the center of the entire drum 20. Therefore, even with a small amount of clothing to be dried, it is beneficial to ensure that the second end of the mounting post 30 can reach inside tangled clothing.

[0042] Furthermore, regardless of whether the distance L1 between the second end of the mounting post 30 and the bottom of the roller 20 is 0.3 times or 0.5 times the depth L2 of the roller 20, the length L1 of the mounting post 30 will not exceed half the dimension of the roller 20 in the axial direction. Therefore, the second end of the mounting post 30 will not extend between the center of the roller 20 and the opening of the roller 20, preventing the mounting post 30 from being too long and affecting the rotation of the clothes inside the roller 20. It should also be noted that the numerical ranges involved in the embodiments of this application are approximate values, and due to the influence of the manufacturing process, there may be a certain range of errors. These errors can be considered negligible by those skilled in the art.

[0043] The material of the mounting post 30 can be the same as that of the roller 20. For example, the mounting post 30 can be made of plastics such as polypropylene (PP), or it can be made of aluminum alloy or stainless steel.

[0044] The dryer 100 also includes a controller, which is electrically connected to the heating device 40, the first humidity sensor, and the second humidity sensor 34. When the moisture content detected by both the first and second humidity sensors 34 is less than a preset limit, the controller controls the heating device 40 to stop operating. Here, when the moisture content detected by both the first and second humidity sensors 34 is less than the preset limit, it indicates that the moisture content of both the clothes wrapped on the outside and the clothes wrapped inside is less than the preset limit. At this time, the controller determines that both the clothes wrapped on the outside and the clothes wrapped inside are dry, and then controls the heating device 40 to stop heating to end the drying process.

[0045] The preset limit can be designed based on actual experience. For example, the preset limit can be 3%, that is, when both the clothes wrapped on the outside and the clothes wrapped inside are less than 3%, the dryer 100 judges that the clothes are completely dried.

[0046] In summary, the clothes dryer 100 provided in this embodiment, by setting an installation post 30 at the bottom of the drum 20, with the installation post 30 extending into the drum 20 and the length of the installation post 30 being 0.3 to 0.5 times the dimension of the drum 20 in its axial direction, allows the second end of the installation post 30 to extend into the interior of the tangled clothes; and by setting a first humidity sensor and a second humidity sensor 34 on the inner wall of the drum 20 and the second end of the installation post 30, respectively, when the moisture content detected by the first humidity sensor and the second humidity sensor 34 is lower than a preset limit, the controller determines that both the clothes tangled on the outside and the clothes tangled inside are dry, and then controls the heating device 40 to stop heating, thereby ensuring that the clothes dryer 100 ends the drying program only after the clothes are completely dry, thus helping to ensure that the clothes taken out by the user are completely dry.

[0047] It can be seen that in related technologies, when determining whether clothes are dry based solely on the humidity detected by the humidity sensor on the inner wall of the drum 20, there are measurement errors. However, this embodiment improves the accuracy of the measurement by adding a second humidity sensor 34 that can detect the moisture content of the clothes wrapped inside, thus avoiding misjudgment.

[0048] It is worth noting that when the clothes are not tangled, the first humidity sensor and the second humidity sensor 34 can also be used to detect the moisture content of the clothes, so that the dryer 100 can operate normally when the clothes are not tangled.

[0049] Based on the description above that the distance L1 between the second end of the mounting post 30 and the bottom of the roller 20 is 0.3 to 0.5 times the depth L2 of the roller 20, it can be understood that the distance L1 between the second end of the mounting post 30 and the bottom of the roller 20 is related to the dimension of the roller 20 along its axial direction. For example, the distance L1 between the second end of the mounting post 30 and the bottom of the roller 20 is greater than or equal to 10cm and less than or equal to 15cm. That is to say, the length of the mounting post 30 can be 10cm, 11cm, 12cm, or 15cm, etc.

[0050] The mounting post 30 can be cylindrical, or the cross-section of the mounting post 30 along its central axis can be square or rectangular. Figure 2 and Figure 3 In the example shown, the mounting post 30 can also be conical, and the diameter of the mounting post 30 gradually decreases from the first end to the second end. In other words, the diameter of the first end of the mounting post 30 is larger than the diameter of the second end of the mounting post 30. This design has two advantages: firstly, compared to a cylindrical mounting post 30, the conical mounting post 30 occupies less space within the roller 20 while still providing space for the second humidity sensor 34, thus preventing a reduction in the amount of clothing that the roller 20 can hold; secondly, compared to a rectangular mounting post 30, if clothing gets tangled on the mounting post 30, the conical mounting post 30 causes less friction on the clothing, making it easier to remove the clothing from the mounting post 30.

[0051] The mounting post 30 can also be a hollow structure, and the bottom of the roller 20 has a wire-passing hole that communicates with the interior of the mounting post 30. The second humidity sensor 34 is connected to the controller via a wire, and the controller is located outside the roller 20. Here, the wires extend from the interior of the mounting post 30 and through the wire-passing hole to the outside of the roller 20 to connect with the controller. This arrangement hides the wires inside the mounting post 30, thus helping to prevent the wires from getting tangled with clothing.

[0052] Figure 5 This is a schematic diagram illustrating the principle of a clothes dryer 100 according to an embodiment of this application. (Refer to...) Figure 5The drum 20 has multiple air inlets 21 at its bottom and an air outlet at its opening. The heating device 40 includes an air duct 41, a fan 43, and a heat exchange system 42. The air inlet of the air duct 41 is connected to the air outlet of the drum 20, and the air outlet of the air duct 41 is connected to the air inlet 21 of the drum 20. The fan 43 drives air to flow through the air duct 41 and the drum 20. The heat exchange system 42 heats the air flowing through the air duct 41, so that the heated air is blown into the drum 20 from the air inlets 21, thereby drying the clothes inside the drum 20. In this example, because the hot air is blown into the drum 20 from the air inlets 21 at the bottom of the drum 20, and the mounting post 30 is inserted into the clothes wrapped inside, the mounting post 30 acts as a guide, allowing the hot air blown in from the air inlets 21 to flow along the mounting post 30 into the clothes wrapped inside, thus ensuring that the clothes wrapped inside can be dried quickly.

[0053] For example, the heat exchange system 42 can be a heat pump system, in which case the dryer 100 is a heat pump dryer 100. Specifically, the heat exchange system 42 may include a condenser 420, an evaporator 421, and a compressor 422. Both the condenser 420 and the evaporator 421 include gas flow channels for gas flow and pipes for refrigerant flow. The gas flow channels and pipes are arranged in a crisscross pattern to achieve heat exchange between the gas and the refrigerant. The air duct 41 includes a first part 410 and a second part 411. The air outlet of the drum 20 and the air inlet of the evaporator 421 are connected through the first part 410. The air outlet of the evaporator 421 is connected to the air inlet of the condenser 420. The air outlet of the condenser 420 and the air inlet 21 of the drum 20 are connected through the second part 411. The compressor 422 is installed independently of the air duct 41. The compressor 422 is located between the outlet of the evaporator 421 and the inlet of the condenser 420. The evaporator 421, compressor 422, and condenser 420 are connected to form a heat pump circuit for supplying refrigerant circulation. The evaporator 421 is used to cool the humid air in the first section 410 to remove moisture. The condenser 420 is used to heat the dry, cool air after moisture removal and cooling in the evaporator 421. The compressor 422 is used to compress the refrigerant and is the power supply unit for the refrigerant circulation along the heat pump circuit.

[0054] An exemplary working principle of the dryer 100 in this embodiment is as follows:

[0055] The hot and humid air entering the first part 410 from the air outlet of the drum 20 enters the evaporator 421 from the air inlet of the evaporator 421 and exchanges heat with the refrigerant in the pipes of the evaporator 421. The heat of the hot and humid air is exchanged with the refrigerant in the pipes of the evaporator 421, causing the refrigerant to heat up and vaporize. The water vapor in the hot and humid air condenses into water droplets due to the decrease in temperature and separates from the air under the action of gravity. The dry and cold air that has lost a large amount of water vapor is discharged from the air outlet of the evaporator 421 and then enters the condenser 420 from the air inlet of the condenser 420.

[0056] The refrigerant, after being heated and vaporized in the evaporator 421, becomes a high-temperature and high-pressure gas under the action of the compressor 422. It then flows into the pipe of the condenser 420 and exchanges heat with the dry and cold air entering the condenser 420 from the air inlet. After absorbing a large amount of heat from the high-temperature and high-pressure gaseous refrigerant, the dry and cold air becomes dry and hot air. The dry and hot air flows from the air outlet of the condenser 420 into the second part 411 of the air duct 41, and then flows into the drum 20 through the air inlet 21 of the drum 20 to dry the clothes inside the drum 20.

[0057] After the dry, hot air vaporizes the water in the wet clothes, it becomes humid, hot air, which then re-enters the first section 410 through the air outlet of the drum 20, thus starting the next cycle. The refrigerant that has lost heat in the condenser 420 pipes flows back into the evaporator 421 pipes to start the next cycle. In this way, the clothes can be dried.

[0058] Of course, the dryer 100 is not limited to a heat pump dryer 100, but can also be a condenser dryer 100 or other types of dryers 100 in related technologies.

[0059] It should be noted that when the mounting column 30 is a hollow structure, the air inlet 21 is not connected to the interior of the mounting column 30, so as to prevent hot air from blowing into the interior of the mounting column 30 and causing the wire to overheat and break.

[0060] In the above embodiments, there may be one or more second humidity sensors 34. If there is one second humidity sensor 34, it is mounted on the end of the second end of the mounting post 30. Furthermore, when the mounting post 30 is conical, the second humidity sensor 34 is positioned at the tip of the cone. This ensures that the second humidity sensor 34 can come into contact with the clothing wrapped inside.

[0061] When there are multiple second humidity sensors 34, one of the multiple second humidity sensors 34 is disposed at the end of the second end of the mounting post 30, and the remaining second humidity sensors 34 are disposed on the outer surface of the second end of the mounting post 30, and the remaining second humidity sensors 34 are spaced apart around the central axis of the mounting post 30. By providing multiple second humidity sensors 34, the extra second humidity sensors 34 can be used as spares, which is more conducive to improving the accuracy of detection and minimizing measurement errors.

[0062] Furthermore, if there are multiple second humidity sensors 34, the controller can stop heating the heating device 40 when the moisture content detected by the first humidity sensor is lower than a preset limit, and when the average moisture content detected by all the second humidity sensors 34 is lower than a preset limit. That is, in this example, the condition for determining that the clothes are completely dry can be that the moisture content detected by the first humidity sensor and the average moisture content detected by the second humidity sensors 34 are both lower than a preset limit.

[0063] As another feasible embodiment, the condition for determining that the clothes are completely dry can be replaced by the condition that the moisture content detected by the first humidity sensor and all the second humidity sensors 34 is lower than a preset limit. Compared with the previous embodiment, since the installation positions of the multiple second humidity sensors 34 are different, by setting the condition for determining that the clothes are completely dry to the point that the moisture content detected by all the second humidity sensors 34 is lower than the preset limit, it can be ensured that the dryer 100 only ends the drying program when all parts of the clothes wrapped inside are dry, thereby ensuring that the clothes taken out by the user are completely dry.

[0064] See also Figure 3 It is understandable that the first end of the mounting column 30 is also connected to the mounting enclosure 31, which is securely connected to the bottom of the roller 20. Thus, the mounting column 30 is connected to the roller 20 through the mounting enclosure 31, and the mounting enclosure 31 provides the possibility for the connection between the mounting column 30 and the roller 20.

[0065] Figure 6 This is a schematic diagram of the mounting column 30 in the dryer 100 according to an embodiment of this application. Please refer to... Figure 6 The mounting wall 31 defines a cavity, within which a connecting post 32 is installed. One end of the connecting post 32 is connected to the mounting wall 31, and the other end is securely connected to the bottom of the roller 20. This design not only achieves connection between the mounting post 30 and the roller 20, but also conceals the connecting post 32 within the cavity of the mounting wall 31, resulting in a neat appearance and reducing the risk of clothing getting tangled on the connecting post 32.

[0066] Furthermore, when the mounting post 30 is a hollow structure, and the bottom of the roller 20 is provided with a wire passage hole, the wire passage hole communicates with the cavity when it extends out of the roller 20. It is worth noting that when the bottom of the roller 20 has an air inlet 21, the cavity is not connected to the air inlet 21 to prevent hot air from being blown into the cavity and the interior of the mounting post 30.

[0067] The mounting wall 31 can be in the shape of a hollow cylinder or a hollow frustum; this embodiment does not limit this. For some examples, please refer to [link / reference needed]. Figure 6 As shown, the mounting wall 31 is specifically shaped like a hollow frustum, and the cross-sectional area of ​​the mounting wall 31 along the central axis of the mounting column 30 gradually decreases from the end furthest from the mounting column 30 to the end closest to the mounting column 30. In other words, the inner diameter of the end of the mounting wall 31 furthest from the mounting column 30 is larger than the inner diameter of the end of the mounting wall 31 closest to the mounting column 30. This design minimizes the installation space occupied by the mounting wall 31 within the roller 20, while ensuring that the mounting wall 31 can connect to the roller 20, thus preventing a reduction in the amount of laundry that the roller 20 can hold.

[0068] The connection method between the connecting post 32 and the bottom of the roller 20 is not limited to snap-fit; it can also be achieved by screw connection or other methods. When the connecting post 32 and the bottom of the roller 20 are snap-fit ​​connected, the end of the connecting post 32 facing away from the mounting post 30 is provided with a locking block, and the bottom of the roller 20 is provided with a locking groove that engages with the locking block. Alternatively, the end of the connecting post 32 facing away from the mounting post 30 is provided with a locking groove, and the bottom of the roller 20 is provided with a locking block that engages with the locking groove.

[0069] Figure 7 This is an exploded view of the roller 20 and mounting post 30 in the dryer 100 according to an embodiment of this application. See also... Figure 7 As shown, when the connecting column 32 is screwed to the bottom of the roller 20, the connecting column 32 has a threaded hole at its center, and the bottom of the roller 20 has a through hole. The center line of the through hole and the center line of the threaded hole are collinear. The screw 50 passes through the through hole and engages with the threaded hole.

[0070] Furthermore, multiple reinforcing ribs 33 protrude from the side wall of the connecting column 32. Each reinforcing rib 33 extends along the length of the connecting column 32, and the multiple reinforcing ribs 33 are spaced apart around the center line of the connecting column 32. One end of each reinforcing rib 33 is connected to the mounting wall 31. Thus, by providing reinforcing ribs 33, the structural stability of the connecting column 32 is improved. In addition, multiple connecting columns 32 can be provided. By increasing the number of connecting columns 32, the number of connections between the mounting column 30 and the roller 20 is increased, thereby improving the connection stability between the mounting column 30 and the roller 20.

[0071] It should be understood that in the description of this specification, the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0072] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A clothes dryer, characterized in that, include: A roller, used to hold clothes; A heating device is used to dry the clothes inside the drum; The mounting column has a first end that is fastened to the bottom of the drum, and a second end that extends into the drum. The central axis of the mounting column is collinear with the axis of the drum, and the distance between the second end of the mounting column and the bottom of the drum is 0.3 to 0.5 times the depth of the drum. The first humidity sensor is installed on the inner wall of the roller; A second humidity sensor is installed at the second end of the mounting post; The controller is electrically connected to both the first humidity sensor and the second humidity sensor. When the humidity detected by both the first humidity sensor and the second humidity sensor is less than a preset limit, the controller controls the heating device to stop operating.

2. The clothes dryer according to claim 1, characterized in that, The mounting post is conical, and the diameter of the first end of the mounting post is larger than the diameter of the second end of the mounting post.

3. The clothes dryer according to claim 1, characterized in that, The second humidity sensor is provided and is disposed at the end of the second end of the mounting post.

4. The clothes dryer according to claim 1, characterized in that, The second humidity sensor is provided in multiple ways. When the humidity detected by the first humidity sensor and all the second humidity sensors is less than a preset limit, the controller controls the heating device to stop operating.

5. The clothes dryer according to claim 4, characterized in that, One of the plurality of second humidity sensors is disposed at the end of the second end of the mounting post, and the remaining second humidity sensors are disposed at intervals around the central axis of the mounting post on the outer surface of the second end of the mounting post.

6. The clothes dryer according to any one of claims 1 to 5, characterized in that, The first end of the mounting column is connected to a mounting enclosure, and the mounting enclosure is fastened to the bottom of the roller. The drum has multiple air inlets at its bottom and an air outlet at its opening. The heating device includes an air duct, a fan, and a heat exchange system. The air inlet of the air duct is connected to the air outlet of the drum, and the air outlet of the air duct is connected to the air inlet of the drum. The fan drives air to flow within the air duct and the drum, and the heat exchange system heats the air flowing through the air duct.

7. The clothes dryer according to claim 6, characterized in that, The mounting wall defines a cavity, and a connecting column is provided in the cavity. One end of the connecting column is connected to the mounting wall, and the other end of the connecting column is fastened to the bottom of the roller.

8. The clothes dryer according to claim 7, characterized in that, The mounting enclosure is in the shape of a hollow frustum, and the cross-sectional area of ​​the mounting enclosure along the central axis of the mounting column gradually decreases from the end furthest from the mounting column to the end closest to the mounting column.

9. The clothes dryer according to claim 7, characterized in that, Multiple reinforcing ribs protrude from the side wall of the connecting column, the reinforcing ribs extend along the length of the connecting column, and one end of the reinforcing ribs is connected to the mounting wall.

10. The clothes dryer according to any one of claims 1 to 5, characterized in that, The distance between the second end of the mounting column and the bottom of the cylinder is greater than or equal to 10cm and less than or equal to 15cm.

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