Drying system of twin washing machine

By using a single fan and heater in a twin washing machine, combined with an air guide shell and heat exchange tube, the problem of high cost of independent drying systems in twin washing machines is solved, achieving independent drying and reduced energy consumption.

CN223646795UActive Publication Date: 2025-12-09ANHUI MOYU TECH CO LTD
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Patent Information

Application Number
CN202423086373.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-13
Publication Date
2025-12-09
Estimated Expiration
2034-12-13

AI Technical Summary

Technical Problem

Existing twin washing machines use two independent drying systems, resulting in higher costs.

Method used

Using a single fan and a heater, along with an air guide shell, heat exchange pipes, and exhaust gas treatment device, the two washing tubs can be dried independently, reducing heat loss and costs.

Benefits of technology

It enables independent drying of the two washing tubs, reducing costs, and reduces energy consumption through heat recovery.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model is suitable for the technical field of laundry equipment, and provides a drying system of a twin washing machine. The air guide shell is provided with an air guide cavity, the air guide cavity communicates with a first air inlet end, a first air outlet end and a second air outlet end, and the first air inlet end communicates with the output end of the fan; the first heater is arranged in the air guide shell; the heat exchange pipe comprises an inner-layer pipe and an outer-layer pipe arranged on the outer side of the inner-layer pipe in a sleeving mode, one end of the outer-layer pipe is communicated with the input end of the fan, the other end of the outer-layer pipe is communicated with the atmosphere, an air inlet channel is formed between the inner-layer pipe and the outer-layer pipe, one end of the inner-layer pipe is communicated with the tail gas treatment device, the other end of the inner-layer pipe is communicated with the washing barrel through a side pipe, and a pipe body of the inner-layer pipe is made of heat conduction materials. Air in the washing barrels is directly exhausted out of the atmosphere, the draught fan sucks fresh air again through the air inlet channel, the air between the two washing barrels cannot flow mutually, hot air in the inner-layer pipe can exchange heat with the air in the air inlet channel, heat is recycled, and heat loss is reduced.
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Description

Technical Field

[0001] This utility model belongs to the field of laundry equipment technology, and in particular relates to a drying system for a twin washing machine. Background Technology

[0002] The twin washing machine features a "one machine, two drums" design, allowing for separate operation of the two washing tubs. The two tubs can wash clothes of different materials separately, solving the long-standing problems of healthy separate washing and high-end garment care for users, and has been welcomed by the general public.

[0003] Existing twin washing machines employ two independent circulating drying systems to prevent interference between the two washing tubs. Each system includes a drying heater and a fan. The fan drives airflow through the heater into the washing tub, where the rotating drum tumbles the clothes, allowing the hot air to evaporate moisture. The airflow then returns to the fan's input through pipes, completing the cycle. However, while these independent drying systems ensure the independence of the two tubs, they are also costly. Utility Model Content

[0004] The purpose of this application is to provide a drying system for a twin washing machine, which aims to solve the problem that existing twin washing machines use two independent drying systems to ensure the independence of the two washing tubs, resulting in high costs.

[0005] This application embodiment is implemented as follows: a drying system for a twin washing machine, the twin washing machine including two washing tubs, each washing tub being provided with an air inlet and an air outlet for hot air to flow in and out; the drying system includes:

[0006] Fan;

[0007] An air guide shell has an air guide cavity, which is connected to a first air inlet, a first air outlet, and a second air outlet. The first air inlet is connected to the output end of the fan, and the first air outlet and the second air outlet are respectively used to connect to the air inlet of a washing tub.

[0008] The first heater is disposed inside the air guide shell and located at the first air inlet end;

[0009] The heat exchange tube includes an inner tube and an outer tube sleeved outside the inner tube. One end of the outer tube is connected to the input end of the fan, and the other end is connected to the atmosphere. An air inlet channel is formed between the inner tube and the outer tube. One end of the inner tube extends to the outside of the outer tube and is connected to the exhaust gas treatment device. The other end of the inner tube is located inside the outer tube and is connected to two side tubes. The two side tubes extend to the outside of the outer tube and are respectively used to connect to the air outlet of a washing tub. The tube body of the inner tube is made of thermally conductive material.

[0010] As a preferred embodiment of this application, the exhaust gas treatment device includes a condenser box, in which a plurality of condenser plates are disposed, and a curved air guide passage is formed between the plurality of condenser plates. One end of the air guide passage is connected to the air outlet of the inner tube, and the other end is connected to an air outlet.

[0011] In a preferred embodiment of this application, the condenser box is further provided with a water outlet for condensate to flow out. The water outlet is connected to a Tesla valve, which is used to prevent gas in the condenser box from being ejected from the water outlet.

[0012] In a preferred embodiment of this application, a partition plate extending along the length of the inner tube is provided inside the inner tube, the partition plate dividing the inner tube into a first cavity and a second cavity, the first cavity and the second cavity respectively connecting to a side tube.

[0013] In a preferred embodiment of this application, a first baffle plate for shielding the first cavity is rotatably provided at the outlet of the first cavity, and a second baffle plate for shielding the second cavity is rotatably provided at the outlet of the second cavity.

[0014] In a preferred embodiment of this application, the first air outlet is provided with a third baffle plate, which is rotatably connected to the air guide shell. A torsion spring is provided between the third baffle plate and the air guide shell to drive the third baffle plate to close the first air outlet. The third baffle plate is connected to a driving device for driving the third baffle plate to open the first air outlet.

[0015] In a preferred embodiment of this application, the driving device includes a centrifugal assembly and a transmission assembly. The centrifugal assembly includes a first sliding rod, a first slider, a first connecting rod, a second connecting rod, and a sliding sleeve. The first sliding rod is coaxially fixed to the drum of the twin washing machine and rotates with the drum. The first slider is slidably disposed on the first sliding rod. The middle part of the second connecting rod is rotatably connected to the first sliding rod. One end of the second connecting rod is rotatably connected to one end of the first connecting rod. A gravity ball is provided at the other end of the second connecting rod. The other end of the first connecting rod is rotatably connected to the first slider. A crank-slider structure is formed between the first slider, the first connecting rod, the second connecting rod, and the first sliding rod. The sliding sleeve is rotatably sleeved on the first sliding rod and can slide along the first sliding rod. An annular groove is provided on the outer periphery of the sliding sleeve. A connecting part that engages with the annular groove is provided on the second slider. When the sliding sleeve slides along the first connecting rod, it drives the third baffle to rotate through the transmission assembly.

[0016] In a preferred embodiment of this application, the transmission assembly includes a mounting bracket, a drive column, a second sliding rod, a second slider, and a rotating rod. The mounting bracket is fixedly connected to the washing tub. The drive column is coaxially fixedly connected to the rotating shaft of the third baffle. A guide groove is provided on the outer periphery of the drive column. The second sliding rod is fixedly mounted on the mounting bracket. A second slider is slidably mounted on the second sliding rod. The second slider is provided with a drive rod that cooperates with the guide groove. When the second slider slides, the drive rod abuts against the side wall of the guide groove to drive the drive column to rotate. The middle part of the rotating rod is rotatably connected to the mounting bracket. The two ends of the rotating rod are respectively connected to the second slider and the sliding sleeve. When the sliding sleeve slides, it drives the rotating rod to rotate, thereby driving the second slider to slide.

[0017] In a preferred embodiment of this application, heat-conducting fins are provided between the inner tube and the outer tube.

[0018] In a preferred embodiment of this application, a second heater and a third heater are respectively provided at the first air outlet and the second air outlet.

[0019] This application provides a drying system for a twin washing machine. A fan blows air into the air chamber from the first air inlet, heats it with a first heater, and then enters the two washing tubs of the twin washing machine through the first and second air outlets. The air in the washing tubs evaporates the moisture from the clothes and then enters the inner tube, which leads to the exhaust gas treatment device. Meanwhile, the fan draws in fresh air again through the air inlet channel between the inner and outer tubes. This prevents air from flowing between the two washing tubs. Furthermore, when the air in the washing tubs flows to the outdoor environment through the inner tube, it exchanges heat with the air in the air inlet channel, recovering heat and reducing heat loss. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the drying system of a twin washing machine provided in an embodiment of this application;

[0021] Figure 2 for Figure 1 A cross-sectional view of the heat exchange tube in the embodiment;

[0022] Figure 3 for Figure 2 A partial view at point A in the embodiment;

[0023] Figure 4 A partial view of a drying system for a twin washing machine provided in an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the centrifuge assembly in an embodiment of this application;

[0025] Figure 6 for Figure 1 A schematic diagram of the structure of the fan and air guide shell in the middle;

[0026] Figure 7 for Figure 1 A cross-sectional view of the air guide shell in the embodiment;

[0027] Figure 8 for Figure 6 A schematic diagram of the third wind deflector in the embodiment.

[0028] In the picture:

[0029] 10. Washing tub; 100. Fan; 200. Air guide shell; 201. First air inlet; 202. First air outlet; 203. Second air outlet; 210. First cover; 220. Second cover; 211. Air distribution plate; 212. Air guide arc surface;

[0030] 300, Heat exchange tube; 301, First cavity; 302, Second cavity; 303, Air inlet channel; 310, Outer tube; 320, Inner tube; 330, Partition plate; 340, Condensation box; 341, Condensation fins; 342, Air outlet; 343, Water outlet; 350, Tesla valve; 361, First baffle plate; 362, Second baffle plate; 370, Side tube;

[0031] 400, Drive unit; 401, Mounting bracket; 410, Drive column; 411, Guide groove; 420, Second sliding rod; 430, Second slider; 431, Drive rod; 440, Rotating rod; 441, Waist-shaped hole; 450, First sliding rod; 460, Sliding sleeve; 461, Annular groove; 470, First slider; 471, Connecting part; 480, First connecting rod; 490, Second connecting rod; 491, Gravity ball;

[0032] 510. First heater; 520. Second heater; 530. Third heater;

[0033] 610. Third wind deflector; 611. Main body; 612. Sealing element; 613. Fixing plate. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0035] The specific implementation of this application will be described in detail below with reference to specific embodiments.

[0036] like Figure 1 The diagram shown is a structural schematic of a drying system for a twin washing machine provided in an embodiment of this application. The twin washing machine includes two washing tubs 10, each with an air inlet and an air outlet for hot air inflow and outflow. A drum is rotatably installed inside each washing tub 10. The drying system includes a fan 100, an air guide shell 200, a first heater 510, and a heat exchange tube 300.

[0037] like Figure 6 and Figure 7 As shown, the air guide shell 200 has an air guide cavity, which is connected to a first air inlet 201, a first air outlet 202 and a second air outlet 203. The first air inlet 201 is connected to the output end of the fan 100, and the first air outlet 202 and the second air outlet 203 are respectively used to connect to the air inlet of one washing tub 10 of the twin washing machine.

[0038] like Figure 6 As shown, the first heater 510 is disposed in the air guide shell 200 and located at the first air inlet 201.

[0039] like Figure 1 and Figure 2As shown, the heat exchange tube 300 includes an inner tube 320 and an outer tube 310 sleeved outside the inner tube 320. One end of the outer tube 310 is connected to the input end of the fan 100, and the other end is connected to the atmosphere. An air inlet channel 303 is formed between the inner tube 320 and the outer tube 310. One end of the inner tube 320 extends to the outside of the outer tube 310 and is connected to the exhaust gas treatment device. The other end of the inner tube 320 is located inside the outer tube 310 and is connected to two side tubes 370. The two side tubes 370 extend to the outside of the outer tube 310 and are respectively used to connect to the air outlet of one washing tub 10 of the twin washing machine. The tube body of the inner tube 320 is made of a thermally conductive material. It should be noted that the end of the inner tube 320 located inside the outer tube 310 is not connected to the outer tube 310.

[0040] In this embodiment, the fan 100 blows air into the air chamber from the first air inlet 201, heats it through the first heater 510, and then enters the two washing tubs 10 of the twin washing machine through the first air outlet 202 and the second air outlet 203 respectively. Afterwards, the air in the washing tubs 10 evaporates the moisture on the clothes and enters the inner tube 320, which then flows to the exhaust gas treatment device. Meanwhile, the fan 100 draws in fresh air again through the air inlet channel 303 between the inner tube 320 and the outer tube 310. Thus, the air between the two washing tubs 10 does not flow between them. Furthermore, when the air in the washing tubs 10 flows to the outdoor environment through the inner tube 320, it exchanges heat with the air in the air inlet channel 303, recovering heat and reducing heat loss.

[0041] like Figure 6 and Figure 7 As shown in one example of this application, the air guide shell 200 includes a first cover 210 and a second cover 220, with an air guide cavity formed between the first cover 210 and the second cover 220. Thus, by separating the first cover 210 and the second cover 220, it is convenient to repair and replace components such as the first heater 510 inside the air guide shell 200.

[0042] like Figure 6 and Figure 7 As shown, in one embodiment of this application, a second heater 520 and a third heater 530 are respectively provided at the first air outlet 202 and the second air outlet 203. The second heater 520 and the third heater 530 reheat the air in the air guide cavity, increasing the temperature of the air entering the washing tub 10. Furthermore, by controlling the heating power of the second heater 520 and the third heater 530, the temperatures of the air entering the two washing tubs 10 can be different to meet different user needs.

[0043] like Figure 6As shown in some embodiments of this application, an air distribution plate 211 is also provided inside the air guide shell 200. The air distribution plate 211 is arranged opposite to the first air inlet end 201. The end of the air distribution plate 211 away from the first air inlet end 201 is connected to two air guiding arc surfaces 212 extending to both sides of the air distribution plate 211. The air entering the air guide cavity is diverted by the air distribution plate 211, and the air after diversion changes its flow direction along the air guiding arc surfaces 212, which can reduce air flow loss.

[0044] like Figures 1 to 3 As shown, in a preferred embodiment of this application, the exhaust gas treatment device includes a condenser box 340, in which a plurality of condenser plates 341 are disposed, and a curved air guide passage is formed between the plurality of condenser plates 341. One end of the air guide passage is connected to the air outlet end of the inner tube 320, and the other end is connected to an air outlet 342.

[0045] In this embodiment, heated air enters the washing tub 10, evaporating moisture from the clothes and carrying away water vapor. The water vapor flows out from the outlet of the inner tube 320, impacting the condenser fins 341 and forming condensate. The air continues to flow through a curved air passage formed between the multiple condenser fins 341, finally exiting from the air outlet 342. This condensation of water vapor reduces the moisture content in the exhaust gas, minimizing environmental impact. Specifically, in some embodiments, multiple condenser fins 341 are alternately arranged extending in opposite directions from the top and bottom walls of the condenser box 340, and the height of the multiple condenser fins 341 exceeds half the distance between the top and bottom walls of the condenser box 340.

[0046] like Figure 3 As shown, in another preferred embodiment of this application, the condenser box 340 is further provided with a water outlet 343 for condensate to flow out. The water outlet 343 is connected to a Tesla valve 350, which is used to prevent gas in the condenser box 340 from being ejected from the water outlet 343. It is understood that when fluid enters from the inlet end of the Tesla valve 350, the resistance is small, but if the fluid wants to enter from the outlet end of the Tesla valve 350, the resistance it experiences will be large, and the faster the fluid velocity, the greater the resistance provided by the Tesla valve 350.

[0047] In this embodiment, the Tesla valve 350 is installed in reverse, and the condensate in the condensate box 340 can slowly flow out of the Tesla valve 350. Meanwhile, the faster-flowing air will encounter greater resistance in the Tesla valve 350, thus reducing its flow rate. This prevents the airflow from carrying the condensate out of the outlet hole.

[0048] like Figure 2 and Figure 3As shown in a preferred embodiment of this application, a partition plate 330 extending along the length of the inner tube 320 is provided inside the inner tube 320. The partition plate 330 divides the inner tube 320 into a first cavity 301 and a second cavity 302. The first cavity 301 and the second cavity 302 are respectively used to communicate with one of the side tubes 370. In this embodiment, the partition plate 330 can prevent air from flowing between the two washing tubs 10 of the twin washing machine, ensuring the independence of the two washing tubs 10.

[0049] like Figure 3 As shown, in a preferred embodiment of this application, a first baffle plate 361 for shielding the first cavity 301 is rotatably provided at the outlet of the first cavity 301, and a second baffle plate 362 for shielding the second cavity 302 is rotatably provided at the outlet of the second cavity 302.

[0050] In this embodiment, when only the washing tub connected to the second cavity 302 is being dried, the gas in the second cavity 302 will blow up the second baffle 361, allowing the gas in the second cavity 302 to flow out, while no gas flows out of the first cavity 301. The first baffle 361 blocks the outlet of the first cavity 301, preventing air in the condenser box 340 from flowing back into the first cavity 301. Similarly, when no gas flows out of the second cavity 302, the second baffle 362 will block the outlet of the second cavity 302.

[0051] like Figure 6 and Figure 7 As shown in a preferred embodiment of this application, the first air outlet 202 is provided with a third baffle plate 610, which is rotatably connected to the air guide shell 200. A torsion spring is provided between the third baffle plate 610 and the air guide shell 200 to drive the third baffle plate 610 to shield the first air outlet 202. The third baffle plate 610 is connected to a driving device 400 for driving the third baffle plate 610 to open the first air outlet 202. In this embodiment, when the drying function is not required or when washing clothes, the third baffle plate 610 shields the first air outlet 202 to prevent a large amount of water from entering the air guide cavity, thus protecting the drying system.

[0052] In some other embodiments, a third baffle plate 610 is also provided at the second air outlet 203, and the third baffle plate 610 at the second air outlet 203 is also connected to a torsion spring and a drive device 400. In this way, by shielding the first air outlet 202 or the second air outlet 203 by the third baffle plate 610, the individual drying function of the two washing tubs 10 of the twin washing machine can be realized.

[0053] like Figure 8As shown, in one embodiment of this application, the third wind deflector 610 includes a main body 611, a sealing element 612 is provided on the main body 611, and a fixing plate 613 is provided at the end of the sealing element 612 away from the main body 611. The fixing plate 613 and the main body 611 clamp the sealing element 612 to fix the sealing element 612. The fixing plate 613 and the main body 611 are connected by a bolt assembly.

[0054] like Figure 4 and Figure 5 As shown in a preferred embodiment of this application, the driving device 400 includes a centrifugal assembly and a transmission assembly. The centrifugal assembly includes: a first sliding rod 450, a first slider 470, a first connecting rod 480, a second connecting rod 490, and a sliding sleeve 460. The first sliding rod 450 is coaxially fixed to the drum of the twin washing machine and rotates with the drum. The first slider 470 is slidably disposed on the first sliding rod 450. The middle part of the second connecting rod 490 is rotatably connected to the first sliding rod 450. One end of the second connecting rod 490 is rotatably connected to one end of the first connecting rod 480, and the other end of the second connecting rod 490 is provided with... There is a gravity ball 491. The other end of the first connecting rod 480 is rotatably connected to the first slider 470. The first slider 470, the first connecting rod 480, the second connecting rod 490 and the first sliding rod 450 form a crank-slider structure. The sliding sleeve 460 is rotatably sleeved on the first sliding rod 450 and can slide along the first sliding rod 450. The outer periphery of the sliding sleeve 460 is provided with an annular groove 461. The second slider 430 is provided with a connecting part 471 that is fastened to the annular groove 461. When the sliding sleeve 460 slides along the first connecting rod 480, it drives the third wind deflector 610 to rotate through the transmission assembly.

[0055] In this embodiment, the air entering the washing tub 10 is heated to a high temperature. When the drum of the washing tub 10 rotates the clothes slowly, a large amount of hot air is blown into the same spot on the clothes, which can easily damage them. The crank-slider structure composed of the first slider 470, the first connecting rod 480, the second connecting rod 490, and the first sliding rod 450 in the centrifugal device rotates with the drum. When the gravity ball 491 rotates, it is driven by centrifugal force to rotate the second connecting rod 490. The second connecting rod 490 drives the first slider 470 to move through the first connecting rod 480. Since the connecting part 471 is engaged in the annular groove 461, when the first slider 470 slides, it pulls the sliding sleeve 460 to slide along the first connecting rod 480, and drives the third baffle 610 to rotate through the transmission assembly. The greater the rotation speed of the drum, the greater the centrifugal force on the gravity ball 491. The centrifugal force is transmitted to the third baffle plate 610, causing the torsion spring on the third baffle plate 610 to deform more, opening the third baffle plate 610 to a greater angle. In this way, the size of the first air outlet 202 and the second air outlet 203 can be adjusted according to the rotation speed of the drum, thus controlling the air volume.

[0056] It should be noted that the sliding sleeve 460 is rotatably fitted onto the first sliding rod 450 and can slide along the first sliding rod 450. Thus, when the first sliding rod 450 rotates with the roller, the sliding sleeve 460 will not rotate with the first sliding rod 450. Moreover, the outer periphery of the sliding sleeve 460 is provided with an annular groove 461, and the first slider 470 is provided with a connecting part 471 that engages with the annular groove 461. Thus, when the first slider 470 rotates with the first sliding rod 450, the connecting part 471 moves along the annular groove 461 and will not drive the sliding sleeve 460 to rotate. However, when the first slider 470 slides along the first sliding rod 450, the connecting part 471 abuts against the side wall of the annular groove 461 to drive the sliding sleeve 460 to slide.

[0057] like Figure 4 and Figure 5As shown in a preferred embodiment of this application, the transmission assembly includes a mounting bracket 401, a drive column 410, a second sliding rod 420, a second slider 430, and a rotating rod 440. The mounting bracket 401 is fixedly connected to the washing tub 10. The drive column 410 is coaxially fixedly connected to the rotating shaft of the third baffle plate 610. A guide groove 411 is provided on the outer periphery of the drive column 410. The second sliding rod 420 is fixedly mounted on the mounting bracket 401, and the second slider 430 is slidably mounted on the second sliding rod 420. 0. The second slider 430 is provided with a drive rod 431 that cooperates with the guide groove 411. When the second slider 430 slides, the drive rod 431 abuts against the side wall of the guide groove 411 to drive the drive column 410 to rotate. The middle part of the rotating rod 440 is rotatably connected to the mounting bracket 401. The two ends of the rotating rod 440 are respectively connected to the second slider 430 and the sliding sleeve 460. When the sliding sleeve 460 slides, it drives the rotating rod 440 to rotate, thereby driving the second slider 430 to slide. Specifically, in some embodiments, the two ends of the rotating rod 440 are respectively provided with waist-shaped holes 441. The second slider 430 and the sliding sleeve 460 are respectively provided with connecting columns passing through one of the side tube waist-shaped holes 441. The connecting columns slide along the waist-shaped holes 441 to prevent interference.

[0058] In this embodiment, the middle of the rotating rod 440 is hinged to the mounting bracket 401. When the sliding sleeve 460 slides, it drives the rotating rod 440 to rotate. The rotating rod 440 drives the second slider 430 to slide. When the second slider 430 slides, the driving rod 431 abuts against the side wall of the guide groove 411 to drive the driving column 410 to rotate, thereby driving the third baffle plate 610 to rotate, so as to adjust the size of the first air outlet 202 or the second air outlet 203.

[0059] In some embodiments of this application, heat-conducting fins are provided between the inner tube 320 and the outer tube 310. This improves the heat exchange efficiency between the air in the inner tube 320 and the air in the air inlet channel 303, thereby enhancing the heat recovery effect.

[0060] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A drying system for a twin washing machine, the twin washing machine comprising two washing tubs, each washing tub being provided with an air inlet and an air outlet for hot air to flow in and out, characterized in that, The drying system includes: Fan; An air guide shell has an air guide cavity, which is connected to a first air inlet, a first air outlet, and a second air outlet. The first air inlet is connected to the output end of the fan, and the first air outlet and the second air outlet are respectively used to connect to the air inlet of a washing tub. The first heater is disposed inside the air guide shell and located at the first air inlet end; The heat exchange tube includes an inner tube and an outer tube sleeved outside the inner tube. One end of the outer tube is connected to the input end of the fan, and the other end is connected to the atmosphere. An air inlet channel is formed between the inner tube and the outer tube. One end of the inner tube extends to the outside of the outer tube and is connected to the exhaust gas treatment device. The other end of the inner tube is located inside the outer tube and is connected to two side tubes. The two side tubes extend to the outside of the outer tube and are respectively used to connect to the air outlet of a washing tub. The tube body of the inner tube is made of thermally conductive material.

2. The drying system of a twin washing machine according to claim 1, characterized in that, The exhaust gas treatment device includes a condenser box, in which multiple condenser plates are arranged. A curved air guide passage is formed between the multiple condenser plates. One end of the air guide passage is connected to the air outlet of the inner tube, and the other end is connected to an air outlet.

3. The drying system of a twin washing machine according to claim 2, characterized in that, The condenser box is also provided with a water outlet for condensate to flow out. The water outlet is connected to a Tesla valve, which is used to prevent gas in the condenser box from being ejected from the water outlet.

4. The drying system of a twin washing machine according to claim 3, characterized in that, The inner tube is provided with a partition plate extending along the length of the inner tube, the partition plate dividing the inner tube into a first cavity and a second cavity, the first cavity and the second cavity respectively connected to a side tube.

5. The drying system of a twin washing machine according to claim 4, characterized in that, A first baffle plate for shielding the first cavity is rotatably provided at the outlet of the first cavity, and a second baffle plate for shielding the second cavity is rotatably provided at the outlet of the second cavity.

6. The drying system of a twin washing machine according to claim 5, characterized in that, The first air outlet is provided with a third baffle plate, which is rotatably connected to the air guide shell. A torsion spring is provided between the third baffle plate and the air guide shell to drive the third baffle plate to close the first air outlet. The third baffle plate is connected to a driving device for driving the third baffle plate to open the first air outlet.

7. The drying system of a twin washing machine according to claim 6, characterized in that, The driving device includes a centrifugal assembly and a transmission assembly. The centrifugal assembly includes a first sliding rod, a first slider, a first connecting rod, a second connecting rod, a second slider, and a sliding sleeve. The first sliding rod is coaxially fixed to the drum of the twin washing machine and rotates with the drum. The first slider is slidably disposed on the first sliding rod. The middle part of the second connecting rod is rotatably connected to the first sliding rod. One end of the second connecting rod is rotatably connected to one end of the first connecting rod. The other end of the second connecting rod is provided with a gravity ball. The other end of the first connecting rod is rotatably connected to the first slider. A crank-slider structure is formed between the first slider, the first connecting rod, the second connecting rod, and the first sliding rod. The sliding sleeve is rotatably sleeved on the first sliding rod and can slide along the first sliding rod. The outer circumference of the sliding sleeve is provided with an annular groove. The second slider is provided with a connecting part that fastens to the annular groove. When the sliding sleeve slides along the first connecting rod, it drives the third baffle to rotate through the transmission assembly.

8. The drying system of a twin washing machine according to claim 7, characterized in that, The transmission assembly includes a mounting bracket, a drive column, a second sliding rod, a second slider, and a rotating rod. The mounting bracket is fixedly connected to the washing tub. The drive column is coaxially fixedly connected to the rotating shaft of the third baffle. A guide groove is provided on the outer periphery of the drive column. The second sliding rod is fixedly mounted on the mounting bracket. A second slider is slidably mounted on the second sliding rod. The second slider is provided with a drive rod that cooperates with the guide groove. When the second slider slides, the drive rod abuts against the side wall of the guide groove to drive the drive column to rotate. The middle part of the rotating rod is rotatably connected to the mounting bracket. The two ends of the rotating rod are respectively connected to the second slider and the sliding sleeve. When the sliding sleeve slides, it drives the rotating rod to rotate, thereby driving the second slider to slide.

9. The drying system of a twin washing machine according to claim 1, characterized in that, A heat-conducting fin is provided between the inner tube and the outer tube.

10. The drying system of a twin washing machine according to claim 1, characterized in that, A second heater and a third heater are respectively installed at the first air outlet and the second air outlet.