Air duct structure and drying equipment

Abstract

The invention provides an air duct structure and drying equipment. A front air duct of the air duct structure communicates with a drying space of the drying equipment. A movable mechanism for separating the first cavity and the second cavity is arranged between the first cavity and the second cavity of the condensation assembly; the outer air duct and the inner air duct are connected with the condensation assembly through the outer circulation air outlet and the inner circulation air outlet correspondingly. When the drying equipment is in an internal circulation mode, the movable mechanism is in a first state, and the front air duct, the second cavity and the inner air duct form an internal circulation air duct; when the drying equipment is in the outer circulation mode, the movable mechanism is in the second state, and the front air duct, the first cavity and the outer air duct form an outer circulation air duct. The two channels are switched through the movable mechanism arranged in the condensation assembly, then switching of the inner circulation air channel and the outer circulation air channel is achieved, the drying equipment adopts the corresponding inner circulation air channel and the corresponding outer circulation air channel in the inner circulation mode and the outer circulation mode respectively, the structure is simple, control is convenient, and the drying effect of the drying equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air duct structures, and in particular to an air duct structure and drying equipment. Background Art

[0002] The existing drying equipment has internal and external circulation air ducts that share the same air duct, and needs to be switched with two sets of damper systems when in use, which has a complex structure. For example, when a clothes dryer dries clothes, its internal and external circulation air ducts share the same air duct. For example, the Chinese invention patent with the announcement number CN114980732B discloses a drying box, wherein a first partition is provided in the drying box, and the two sides of the first partition are respectively a drying chamber and a first accommodating chamber, and the first partition and the side wall define a first accommodating chamber, and a wind wheel is provided in the first accommodating chamber, and when the wind wheel rotates, the airflow in the drying chamber is suitable for entering the wind wheel axially through the first air inlet under the action of the wind wheel, and the airflow entering the wind wheel flows along the radial direction of the wind wheel to the first accommodating chamber and is compressed in the first accommodating chamber and then flows into the drying chamber, and the airflow outside the drying box is suitable for entering the first accommodating chamber through the second air inlet under the action of the wind wheel and then flows into the drying chamber, so as to realize the internal circulation and external circulation of air through one wind wheel. Summary of the invention

[0003] The purpose of the embodiments of the present invention is to provide an air duct structure and a drying device, so as to solve the problem in the prior art that the inner and outer air ducts of the drying device share one air duct, resulting in a complex system switching structure and affecting drying.

[0004] The embodiment of the present invention adopts the following technical solution: an air duct structure is applied to a drying device, and the drying device has an internal circulation mode and an external circulation mode;

[0005] The air duct structure comprises:

[0006] A front air duct, one end of which is connected to the drying space of the drying equipment;

[0007] A condensation assembly, whose condensation air inlet is connected to the other end of the front air duct, the condensation assembly having a first cavity and a second cavity, a movable mechanism is provided between the first cavity and the second cavity, and the movable mechanism is used to separate the first cavity and the second cavity;

[0008] An external air duct, one end of which is connected to the external circulation air outlet of the first cavity, and the other end of the external air duct is connected to the outside of the drying device;

[0009] An inner air duct, one end of which is in communication with the inner circulation air outlet of the second cavity, and the other end of which is in communication with the drying space of the drying device;

[0010] When the drying device is in the internal circulation mode, the movable mechanism is in the first state, and the front air duct, the second cavity and the inner air duct constitute an inner circulation air duct; when the drying device is in the external circulation mode, the movable mechanism is in the second state, and the front air duct, the first cavity and the outer air duct constitute an outer circulation air duct.

[0011] The inner air duct and the outer air duct are respectively connected to the condensing assembly. The front air duct can be divided into two channels when passing through the condensing assembly. The two channels are switched by a movable mechanism arranged in the condensing assembly, thereby realizing the switching of the inner circulation air duct and the outer circulation air duct. The drying equipment uses the corresponding inner circulation air duct and outer circulation air duct in the inner circulation mode and the outer circulation mode respectively. The structure is simple and easy to control, which improves the drying effect of the drying equipment when drying clothes and other items.

[0012] In some embodiments, the condensation assembly includes a condenser and a shell, the condenser is arranged in the shell, the shell includes an upper cover and a lower cover, the upper cover and the lower cover enclose the first cavity and the second cavity, the condenser is arranged in the second cavity, and the condensation air inlet, the external circulation air outlet and the internal circulation air outlet are arranged on the upper cover.

[0013] The upper cover and the lower cover enclose a first cavity and a second cavity, and a condenser is arranged in the second cavity to condense the internally circulated gas, thereby removing moisture from the gas and improving the drying effect.

[0014] In some embodiments, the movable mechanism includes a movable baffle and a motor, the output shaft of the motor is connected to one end of the movable baffle, and the movable baffle is arranged between the first cavity and the second cavity; when the drying equipment switches from the internal circulation state to the external circulation state, the motor drives the movable baffle to rotate so that the internal circulation air duct switches to the external circulation air duct.

[0015] The movable baffle is driven to rotate by a motor to change the position of the movable baffle so as to separate the first cavity and the second cavity at different positions, thereby realizing the switching between the inner circulation air duct and the outer circulation air duct.

[0016] In some embodiments, a through hole is provided on the lower cover, one end of the movable baffle extends out from the through hole and is connected to the output shaft of the motor; the other end of the movable baffle is a free end.

[0017] One end of the movable baffle is hinged on the lower cover and rotates under the drive of the motor. The other end of the movable baffle can be attached to the inner wall of the shell as a free end, so that the gas can enter the second cavity and enter the inner air duct after condensation by the condenser; the movable baffle can also be attached to the side wall of the condenser when the motor is reversed, so that the gas can enter the first cavity and enter the outer air duct through the outer circulation outlet for discharge, thereby realizing the switching of the inner circulation air duct and the outer circulation air duct.

[0018] In some embodiments, the air duct structure further includes an air duct cover, which is disposed on the outer shell of the drying device, and the air duct cover and the outer shell are enclosed to form the outer air duct and the inner air duct. The inner air duct and the outer air duct are enclosed by the air duct cover and the outer shell of the drying device, so that the gas can flow along the inner air duct and the outer air duct, thereby realizing the inner circulation flow or the outer circulation discharge of the gas.

[0019] In some embodiments, an external circulation air inlet is provided on the air duct cover, the external circulation air inlet is provided with an air outlet cover, and the damper cover is hinged at the external circulation air inlet; when the drying device is in the internal circulation mode, the damper cover blocks the external circulation air inlet; when the drying device is in the external circulation mode, the damper cover is opened.

[0020] The damper cover is used to control the air inlet so that only air can enter but not exit; when the drying equipment is in external circulation mode, the gas outside the drying equipment pushes open the damper cover, and air is taken in from the external circulation air inlet to form an external circulation; when the drying equipment is in internal circulation mode, the gas flows back to the drying space of the drying equipment through the second cavity and the internal air duct. The internal pressure of the internal circulation air duct is greater than the external pressure, and the damper cover is sealed at the external circulation air inlet to realize the internal circulation of the gas.

[0021] In some embodiments, the drying equipment is provided with an air inlet, one end of which is connected to the drying space, and the air inlet is respectively connected to the inner air duct and the outer circulation air inlet, and a heating element is provided at the air inlet, and the gas enters the drying space of the drying equipment after being heated by the heating element.

[0022] Regardless of whether the drying equipment is in the internal circulation mode or the external circulation mode, the gas entering the drying space can be heated by the heating element to improve the drying efficiency of the drying equipment.

[0023] In some embodiments, an exhaust port is also provided on the air duct cover, and the exhaust port is connected to the other end of the external air duct. The exhaust port is opened in a direction away from the drying device so that the gas in the external air duct can be discharged through the exhaust port in a direction away from the drying device.

[0024] An exhaust port is arranged on the air duct cover so that when the drying equipment is in the external circulation mode, the gas in the external circulation air duct can be discharged from the drying equipment through the exhaust port in a set direction, thereby reducing the influence of the exhausted gas on the drying equipment.

[0025] In some embodiments, a fan is disposed in the front air duct, and the fan draws the gas in the drying space of the drying equipment to the condensation air inlet through the front air duct.

[0026] The fan can increase the speed of gas flow in the inner circulation air duct and the outer circulation air duct, and improve the drying efficiency of the drying equipment. The fan can also cool the bottom of the condensation component to improve the condensation efficiency of the condensation component.

[0027] The embodiment of the present application also provides a drying device, including the air duct structure as described in any of the above embodiments. The drying device using the above air duct structure uses the inner circulation air duct and the outer circulation air duct to realize gas circulation in the inner circulation mode and the outer circulation mode respectively, thereby reducing the mutual influence between different circulation air ducts and improving the drying effect of the drying device.

[0028] The beneficial effects of the embodiments of the present invention are:

[0029] The inner air duct and the outer air duct are respectively connected to the condensing assembly. The front air duct can be divided into two channels when passing through the condensing assembly. The two channels are switched by a movable mechanism arranged in the condensing assembly, thereby realizing the switching of the inner circulation air duct and the outer circulation air duct. The drying equipment uses the corresponding inner circulation air duct and outer circulation air duct in the inner circulation mode and the outer circulation mode respectively. The structure is simple and easy to control, which improves the drying effect of the drying equipment when drying clothes and other items. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 It is a schematic diagram of the drying equipment and air duct structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the drying equipment and air duct structure of the present invention after the air duct cover and the air door cover are disassembled;

[0033] Figure 3 It is a structural exploded diagram of the condensation component of the present invention;

[0034] Figure 4It is a schematic diagram of the cross-sectional structure of the condensation component of the present invention;

[0035] Figure 5 This is a simplified schematic diagram of the external circulation air duct of the present invention;

[0036] Figure 6 It is a simplified schematic diagram of the internal circulation air duct of the present invention.

[0037] Figure numerals: 1. drying equipment; 101. drying space; 102. drum; 103. bottom plate; 2. front air duct; 3. condensation assembly; 301. condenser; 302. upper cover; 3021. condensation air inlet, 3022. external circulation air outlet; 3023. internal circulation air outlet; 3024. first cavity; 3025. second cavity; 303. lower cover; 3031. through hole; 304. sealing ring; 4. movable mechanism; 401. movable baffle; 4011. rotating shaft; 402. motor; 4021. output shaft; 5. external air duct; 6. internal air duct; 7. air duct cover; 701. external circulation air inlet; 702. air outlet cover; 703. exhaust outlet; 8. air inlet; 9. heating element; 10. fan. DETAILED DESCRIPTION

[0038] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0039] 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 only 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.

[0040] 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.

[0041] 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.

[0042] It should also be understood that although the present application has been described with reference to some specific examples, those skilled in the art will be able to readily implement many other equivalent forms of the present application.

[0043] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0044] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that obscure the present application. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0045] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0046] When drying items, the drying device can adopt an internal circulation mode and an external circulation mode. According to the needs of the drying device and convenient considerations such as energy saving, the user can select the drying mode of the drying device. If the internal circulation mode and the external circulation mode of the drying device share an air duct structure, when the internal circulation mode and the external circulation mode are switched, the residual moisture in the air duct may affect the other drying mode. Therefore, the present application discloses an air duct structure, which has an internal circulation air duct and an external circulation air duct. Corresponding circulation air ducts can be used corresponding to different drying modes of the drying device, and the switching mechanism of the internal circulation air duct and the external circulation air duct is simple, which is convenient for switching.

[0047] The air duct structure can be applied to a drying device, and the drying device can be, but is not limited to, a clothes dryer. For ease of understanding, the present application will be described below by taking the drying device as a clothes dryer as an example.

[0048] The drying equipment has an internal circulation mode and an external circulation mode. For example, energy conservation and humidity control can be achieved in the internal circulation mode. Specifically, the internal circulation mode reuses the hot air and recycles the moisture in the drying space after dehumidification. The hot air is recycled, reducing energy waste. The hot air continuously circulates in the drying space, which helps to evenly dry the clothes in the dryer, and the humidity can be well controlled, making the drying effect more stable. In the external circulation mode, it is suitable for drying more clothes. The external circulation mode discharges the hot air out of the dryer in exchange for fresh air to discharge moisture. The external circulation mode is more suitable for drying large and complex-shaped items. Sufficient air flow can be maintained in the drying room, moisture can be quickly removed, and the drying effect is better.

[0049] Based on the above basic introduction of drying equipment 1 and drying mode, combined with Figure 1 and Figure 2 , the air duct structure includes the following specific structures:

[0050] One end of the front air duct 2 is communicated with the drying space 101 of the drying device 1 , and the gas in the drying space 101 can enter the front air duct 2 .

[0051] The condensation assembly 3 has a condensation air inlet, which is connected to the other end of the front air duct 2, and the gas in the front air duct 2 can enter the condensation assembly 3 through the condensation air inlet. The condensation assembly 3 has a first cavity 3024 and a second cavity 3025, and a movable mechanism 4 is arranged between the first cavity 3024 and the second cavity 3025, and the movable mechanism 4 is used to separate the first cavity 3024 and the second cavity 3025. The movable mechanism 4 can be operated according to the drying mode of the drying device 1, and the position angle of the movable mechanism 4 is adjustable. Regardless of whether the drying device 1 is in the internal circulation mode or the external circulation mode, the movable mechanism 4 can separate the first cavity 3024 and the second cavity 3025 into two relatively independent cavities, and the first cavity 3024 is not connected to the second cavity 3025.

[0052] Among them, the first cavity 3024 has an external circulation air outlet, and the second cavity 3025 has an internal circulation air outlet 3023. The gas entering the condensation component 3 through the condensation air inlet can be discharged from the condensation component 3 through the external circulation air outlet of the first cavity 3024, and can also be discharged from the condensation component 3 through the internal circulation air outlet 3023 of the second cavity 3025.

[0053] One end of the external air duct 5 is connected to the external circulation air outlet of the first cavity 3024, and the connection can be sealed, for example, the external air duct 5 and the external circulation air outlet of the first cavity 3024 are sealed by a sealing ring. The other end of the external air duct 5 is connected to the outside of the drying device 1, so that the gas with high humidity in the external air duct 5 can be discharged through the external air duct 5.

[0054] One end of the inner air duct 6 is connected to the inner circulation air outlet 3023 of the second cavity 3025, and the connection can be sealed, for example, the inner air duct 6 and the inner circulation air outlet 3023 of the second cavity 3025 are sealed by a sealing ring. The other end of the inner air duct 6 is connected to the drying space 101 of the drying device 1 to send the gas in the inner air duct 6 back to the drying space 101, so that the gas is reused, the utilization rate of the heated gas is improved, and the waste of energy is reduced.

[0055] Combination Figure 5 and Figure 6When the drying device 1 is in the internal circulation mode, the movable mechanism 4 is in the first state, and the front air duct 2, the second cavity 3025 and the internal air duct 6 form an internal circulation air duct. For example, the gas after drying the clothes in the drying space 101 contains a certain amount of moisture. After this part of the gas passes through the condenser 301 in the second cavity 3025 and is condensed into dry gas, it is then passed into the internal air duct 6 and returns to the drying space 101 to dry the clothes in the drying space. That is, at this time, when the gas in the front air duct 2 flows through the condensation component 3, it is blocked by the movable mechanism 4, and the gas will enter the second cavity 3025, enter the internal air duct 6 through the internal circulation air outlet 3023 of the second cavity 3025, and then return to the drying space 101 to dry the clothes, thereby reducing the noise of the drying device when in use and improving the drying efficiency.

[0056] When the drying device 1 is in the external circulation mode, the movable mechanism 4 is in the second state, and the front air duct 2, the first cavity 3024 and the external air duct 5 form an external circulation air duct. For example, the gas can enter the front air duct 2 from the drying space 101, and then when passing through the condensation air inlet, the movable mechanism 4 has switched from the first state to the second state. Under the blocking effect of the movable mechanism 4, the gas will enter the first cavity 3024, and then enter the external air duct 5 through the external circulation air outlet of the first cavity 3024, and then be discharged outside the dryer. Of course, when the dryer is in the external circulation mode, the external gas can enter the drying space 101 to provide fresh gas for the dryer in the external circulation mode.

[0057] The switching between the first cavity 3024 and the second cavity 3025 can be achieved by simply adjusting one movable mechanism 4, thereby achieving the switching between the inner circulation air duct and the outer circulation air duct.

[0058] In the embodiment of the present application, the inner air duct 6 and the outer air duct 5 are respectively connected to the condensation component 3. The front air duct 2 can be divided into two channels when passing through the condensation component 3. The two channels are switched by the movable mechanism 4 arranged in the condensation component 3, thereby realizing the switching of the inner circulation air duct and the outer circulation air duct, so that the drying device 1 adopts the corresponding inner circulation air duct and outer circulation air duct in the inner circulation mode and the outer circulation mode respectively. The structure is simple and easy to control, which improves the drying effect of the drying device 1 when drying clothes and other items.

[0059] In some embodiments, in combination Figure 3 and Figure 4The condensation assembly 3 includes a condenser 301 and a shell, and the condenser 301 is arranged in the shell. The shell includes an upper cover 302 and a lower cover 303, and the upper cover 302 and the lower cover 303 enclose a first cavity 3024 and a second cavity 3025, wherein the condenser 301 is arranged in the second cavity 3025, and is used to condense the gas flowing through the condenser 301 in the internal circulation mode, condense the moisture in the gas to form water droplets, and obtain dry gas. The dry gas enters the inner air duct 6 through the inner circulation air outlet 3023 of the second cavity 3025, and then returns to the drying space 101 through the inner air duct 6.

[0060] The upper cover 302 and the lower cover 303 may be detachably connected, for example, the upper cover 302 and the lower cover 303 may be detachably connected by means of a buckle, or may be detachably connected by means of bolts and nuts. This is only used as an example and does not constitute a limitation on the scope of protection of the claims.

[0061] A sealing ring 304 may be provided between the upper cover 302 and the lower cover 303 to prevent gas leakage from the connection between the two and affect the drying effect.

[0062] The condensation air inlet, the external circulation air outlet and the internal circulation air outlet 3023 can all be arranged on the upper cover 302. Figure 3 The external circulation air outlet and the internal circulation air outlet 3023 can be located on the same side of the upper cover 302 , and the condensation air inlet can be located on the other side of the upper cover 302 .

[0063] The upper cover 302 and the lower cover 303 enclose a first cavity 3024 and a second cavity 3025, and the condenser 301 is disposed in the second cavity 3025 to condense the internally circulated gas, thereby removing moisture from the gas and improving the drying effect.

[0064] In some embodiments, the movable mechanism 4 includes a movable baffle 401 and a motor 402, wherein an output shaft 4021 of the motor 402 is connected to one end of the movable baffle 401, and a rotating shaft 4011 is provided at one end of the movable baffle 401, and the rotating shaft 4011 is connected to the output shaft 4021 of the motor 402. The movable baffle 401 is arranged between the first cavity 3024 and the second cavity 3025, and is used to separate the first cavity 3024 and the second cavity 3025 into two relatively independent cavities. When the drying device 1 switches from the internal circulation state to the external circulation state, the motor 402 drives the movable baffle 401 to rotate so that the internal circulation air duct switches to the external circulation air duct. The internal circulation air duct and the external circulation air duct are two air ducts, and the two can be switched according to the drying mode of the drying device 1, and the switched internal circulation air duct and the external circulation air duct do not interfere with each other.

[0065] The movable baffle 401 is driven to rotate by the motor 402 to change the position of the movable baffle 401 so as to separate the first cavity 3024 and the second cavity 3025 at different positions, thereby realizing the switching between the inner circulation air duct and the outer circulation air duct.

[0066] In some embodiments, a through hole 3031 is provided on the lower cover 303 , one end of the movable baffle 401 extends out from the through hole 3031 and is connected to the output shaft 4021 of the motor 402 ; the other end of the movable baffle 401 is a free end.

[0067] One end of the movable baffle 401 is hinged on the lower cover 303 and rotates under the driving action of the motor 402. The other end of the movable baffle 401 can be attached to the inner wall of the shell as a free end, so that the gas can enter the second cavity 3025 and enter the inner air duct 6 after condensation by the condenser 301; the free end of the movable baffle 401 can also move toward the condenser 301 when the motor 402 is reversed until the movable baffle 401 is reset, so that the gas can enter the first cavity 3024 and enter the outer air duct 5 through the outer circulation outlet for discharge, thereby realizing the switching between the inner circulation air duct and the outer circulation air duct.

[0068] In some embodiments, the air duct structure further includes an air duct cover 7, which is disposed on the housing of the drying device 1. The housing of the drying device 1 includes a door for opening and closing the drying device 1, and also includes a bottom plate 103 disposed away from the door. The air duct cover 7 and the housing are enclosed to form an outer air duct 5 and an inner air duct 6. Figure 2 The air duct cover 7 and the bottom plate 103 of the drying device 1 form an inner air duct 6 and an outer air duct 5, and the outer air duct 5 is arranged vertically, and the gas discharged into the outer air duct 5 through the air outlet of the outer air duct 5 is discharged upward from the drying device 1. The inner air duct 6 is also an air duct structure extending upward, so that the gas discharged into the inner air duct 6 through the air outlet of the inner air duct 6 is discharged upward back to the drying space 101. Through the above-mentioned structural form of the outer air duct 5 and the inner air duct 6, the gas can flow along the direction of the inner air duct 6 and the outer air duct 5, and the gas can be internally circulated or discharged externally.

[0069] In some embodiments, the air duct cover 7 is provided with an external circulation air inlet 701, and fresh air from the outside can enter the drying space 101 through the external circulation air inlet 701. The external circulation air inlet 701 is provided with an air inlet cover 702, and the air door cover is located on the inner side of the air duct cover 7 and is hinged to the external circulation air inlet 701. Specifically, the upper part of the air door cover is hinged to the air duct cover 7.

[0070] When the drying device 1 is in the internal circulation mode, the damper cover blocks the external circulation air inlet 701; when the drying device 1 is in the external circulation mode, the damper cover is opened. Specifically, the damper cover is used to control the air inlet so that air can only enter but not exit; when the drying device 1 is in the external circulation mode, the pressure outside the drying device 1 is greater than the pressure inside the air duct structure, and the gas outside the drying device 1 can push the damper cover open, and the gas outside the drying device 1 can enter through the external circulation air inlet 701 to form an external circulation. When the drying device 1 is in the internal circulation mode, the gas flows back to the drying space 101 of the drying device 1 through the second cavity 3025 and the internal air duct 6. The internal pressure of the internal circulation air duct is greater than the external pressure, and the damper cover is blocked at the external circulation air inlet 701 to realize the internal circulation of the gas.

[0071] In some embodiments, the drying device 1 is provided with an air inlet 8, one end of the air inlet 8 is connected to the drying space 101, and the other end of the air inlet 8 is respectively connected to the inner air duct 6 and the outer circulation air inlet 701. Of course, it can be understood that the inner air duct 6 can also be directly connected to the drying space 101 of the drying device 1, and the gas outside the drying device 1 can flow through the inner air duct 6 through the outer circulation air inlet 701, and then enter the drying space 101 through the inner air duct 6. A heating element 9 is provided at the air inlet 8, and the heating element 9 can be but not limited to a PTC heating element 9. After the gas is heated by the heating element 9, it enters the drying space 101 of the drying device 1, and is used to dry the clothes in the drying space 101.

[0072] Regardless of whether the drying device 1 is in the internal circulation mode or the external circulation mode, the gas entering the drying space 101 can be heated by the heating element 9 to improve the drying efficiency of the drying device 1 .

[0073] In some embodiments, the air duct cover 7 is further provided with an air outlet 703, and the air outlet 703 is connected to the other end of the external air duct 5. Figure 1 The exhaust port 703 is opened in a direction away from the drying device 1, so that the gas in the external air duct 5 can be discharged in a direction away from the drying device 1 through the exhaust port 703. The exhaust port 703 is arranged on the air duct cover 7, so that when the drying device 1 is in the external circulation mode, the gas in the external circulation air duct can be discharged from the drying device 1 through the exhaust port 703 in a set direction, thereby reducing the influence of the discharged gas on the drying device 1.

[0074] In some embodiments, a fan 10 is provided in the front air duct 2, and the fan 10 pumps the gas in the drying space 101 of the drying device 1 to the condensation air inlet through the front air duct 2. The fan 10 can be provided near the condensation assembly 3, and the fan 10 can increase the speed of the gas flow in the inner circulation air duct and the outer circulation air duct, thereby improving the drying efficiency of the drying device 1. The fan 10 can also cool the bottom of the condensation assembly 3 to improve the condensation efficiency of the condensation assembly 3.

[0075] The present application also provides a drying device 1, such as Figure 1 and Figure 2 As shown, it includes the air duct structure as described in any of the above embodiments. The drying device 1 using the above air duct structure uses the inner circulation air duct and the outer circulation air duct to realize the circulation of gas in the inner circulation mode and the outer circulation mode respectively, thereby reducing the mutual influence between different circulation air ducts and improving the drying effect of the drying device 1.

[0076] The drying device 1 has a drum 102. For a clothes dryer, clothes to be dried can be placed in the drum 102, and a drying space 101 is formed in the drum.

[0077] like Figure 5 When the drying device 1 starts the external circulation mode, the motor 402 rotates the movable baffle 401 to Figure 5 In the position shown, the first cavity 3024 and the second cavity 3025 are separated, and the first cavity 3024 is connected to the external circulation air outlet. At this time, the gas is discharged from the exhaust port through the external circulation air duct, and the air in the drum 102 becomes less to form a negative pressure. The air outside the drum pushes open the damper cover of the air duct structure, and air is taken in from the external circulation air inlet 701 to form an external circulation.

[0078] like Figure 6 As shown, when the drying device 1 starts the internal circulation mode, the motor 402 rotates the movable baffle 401 to Figure 6 At the position shown, the gas passes through the condenser 301 of the second cavity 3025 from the internal circulation outlet 3023, and then flows back into the drum 102 through the internal air duct 6. The pressure on the inner side of the damper cover is greater than the external pressure, and the damper cover is pushed against the external circulation air inlet 701 by the internal pressure, thereby sealing the external circulation air inlet 701.

[0079] A number of embodiments of the present invention have been described in detail above, but the present invention is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications to the embodiments based on the concept of the present invention, and these variations and modifications should all fall within the scope of protection claimed by the present invention.

Claims

1. An air duct structure, characterized in that: Applicable to a drying device (1), the drying device (1) having an internal circulation mode and an external circulation mode; The air duct structure comprises: A front air duct (2), one end of which is connected to the drying space (101) of the drying device (1); A condensation component (3), wherein a condensation air inlet is connected to the other end of the front air duct (2), the condensation component (3) having a first cavity (3024) and a second cavity (3025), a movable mechanism (4) being provided between the first cavity (3024) and the second cavity (3025), the movable mechanism (4) being used to separate the first cavity (3024) and the second cavity (3025); An external air duct (5), one end of which is connected to the external circulation air outlet of the first cavity (3024), and the other end of the external air duct (5) is connected to the outside of the drying device (1); An internal air duct (6), one end of which is in communication with the internal circulation air outlet (3023) of the second cavity (3025), and the other end of the internal air duct (6) is in communication with the drying space (101) of the drying device (1); When the drying device (1) is in the internal circulation mode, the movable mechanism (4) is in the first state, and the front air duct (2), the second cavity (3025) and the inner air duct (6) constitute an inner circulation air duct; when the drying device (1) is in the external circulation mode, the movable mechanism (4) is in the second state, and the front air duct (2), the first cavity (3024) and the outer air duct (5) constitute an outer circulation air duct.

2. The air duct structure according to claim 1, characterized in that: The condensation component (3) includes a condenser (301) and a shell, the condenser (301) is arranged in the shell, the shell includes an upper cover (302) and a lower cover (303), the upper cover (302) and the lower cover (303) enclose the first cavity (3024) and the second cavity (3025), the condenser (301) is arranged in the second cavity (3025), and the condensation air inlet, the external circulation air outlet and the internal circulation air outlet (3023) are arranged on the upper cover (302).

3. The air duct structure according to claim 2, characterized in that: The movable mechanism (4) comprises a movable baffle (401) and a motor (402); an output shaft (4021) of the motor (402) is connected to one end of the movable baffle (401); and the movable baffle (401) is arranged between the first cavity (3024) and the second cavity (3025); when the drying device (1) switches from the internal circulation state to the external circulation state, the motor (402) drives the movable baffle (401) to rotate, so that the internal circulation air duct switches to the external circulation air duct.

4. The air duct structure according to claim 3, characterized in that: The lower cover (303) is provided with a through hole (3031), one end of the movable baffle (401) extends out from the through hole (3031) and is connected to the output shaft (4021) of the motor (402); the other end of the movable baffle (401) is a free end.

5. The air duct structure according to claim 1, characterized in that: The air duct structure further comprises an air duct cover (7), wherein the air duct cover (7) is arranged on the outer shell of the drying device (1), and the air duct cover (7) and the outer shell are combined to form the outer air duct (5) and the inner air duct (6).

6. The air duct structure according to claim 5, characterized in that: The air duct cover (7) is provided with an external circulation air inlet (701), the external circulation air inlet (701) is provided with an air outlet cover (702), and the damper cover is hinged at the external circulation air inlet (701); when the drying device (1) is in the internal circulation mode, the damper cover blocks the external circulation air inlet (701); when the drying device (1) is in the external circulation mode, the damper cover is opened.

7. The air duct structure according to claim 6, characterized in that: The drying device (1) is provided with an air inlet (8), one end of which is connected to the drying space (101), and the air inlet (8) is connected to the inner air duct (6) and the outer circulation air inlet (701) respectively. A heating element (9) is provided at the air inlet (8), and the gas enters the drying space (101) of the drying device (1) after being heated by the heating element (9).

8. The air duct structure according to claim 5, characterized in that: The air duct cover (7) is also provided with an exhaust port (703), which is connected to the other end of the external air duct (5), and the exhaust port (703) is opened in a direction away from the drying device (1), so that the gas in the external air duct (5) can be discharged in a direction away from the drying device (1) through the exhaust port (703).

9. The air duct structure according to claim 1, characterized in that: A fan (10) is arranged in the front air duct (2), and the fan (10) draws the gas in the drying space (101) of the drying equipment (1) to the condensation air inlet through the front air duct (2).

10. A drying device (1), characterized in that: It comprises the air duct structure as claimed in any one of claims 1 to 9.

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