A drying device and a washing apparatus

Abstract

The application discloses a drying device and a washing equipment, and relates to the technical field of washing machines. The drying device comprises a drying drum, a negative pressure extraction unit and a circulation unit. The drying drum is provided with a drying cavity. The negative pressure extraction unit is communicated with the drying cavity. The circulation unit is communicated with the drying cavity, and the circulation unit is used for inputting heated gas into the drying cavity and discharging the gas in the drying cavity to perform gas circulation. The drying device provided by the application can realize low-temperature drying and reduce damage to clothes.

Description

Technical Field

[0001] This application relates to the technical field of washing machines, and more particularly to a drying device and washing equipment. Background Technology

[0002] Currently, washing machines have become an indispensable household appliance in people's daily lives.

[0003] However, existing washing machines typically use high-speed rotation or high-temperature heating to spin-dry clothes. High-speed rotation causes friction and stretching of the clothes, easily damaging them. High-temperature spin-drying can damage some heat-sensitive garments, causing unnecessary losses for users. Utility Model Content

[0004] This application provides a drying apparatus and washing equipment to achieve low-temperature drying of clothes and reduce damage to clothes.

[0005] This application provides a drying apparatus, comprising:

[0006] Drying drum, equipped with a drying chamber;

[0007] A negative pressure extraction unit is connected to the drying chamber;

[0008] A circulation unit, connected to the drying chamber, is used to input heated gas into the drying chamber and discharge the gas in the drying chamber for gas circulation.

[0009] In some possible implementations, the circulation unit includes a preheating chamber and a fan, the input end of the preheating chamber being connected to the drying chamber and / or the external environment, the output end of the preheating chamber being connected to the input end of the fan, and the output end of the fan being connected to the drying chamber.

[0010] In some possible implementations, the circulation unit further includes a first control valve connected between the output of the fan and the drying chamber.

[0011] In some possible implementations, the circulation unit further includes a first branch and a second branch, the input end of the first branch being connected to the drying chamber, the input end of the second branch being connected to the external environment, and the output ends of both the first branch and the second branch being connected to the input end of the preheating box.

[0012] In some possible implementations, a second control valve is provided on the first branch, and a third control valve is also provided on the second branch;

[0013] The drying device also includes a control unit, which is electrically connected to the second control valve and the third control valve respectively, and the control unit is capable of controlling at least one of the second control valve and the third control valve to be turned on.

[0014] In some possible implementations, the circulation unit further includes a first filter, the input of which is connected to the drying chamber and / or the external environment, and the output of which is connected to the input of the preheating box.

[0015] In some possible implementations, the circulation unit further includes a first connecting valve, a fan, and a preheating box, the preheating box being connected between the first connecting valve and the input end of the fan, the output end of the fan being connected to the drying chamber, and the first connecting valve being connected to the negative pressure extraction unit.

[0016] The first connecting valve is used to control the connection between the drying chamber and the input end of the preheating box, and the negative pressure unit.

[0017] In some possible implementations, the first connecting valve includes a first port, a second port, and a third port, wherein the first port is selectively connected to one of the second port and the third port;

[0018] The first port is connected to the drying chamber, the second port is connected to the input end of the preheating box, and the third port is connected to the negative pressure extraction unit.

[0019] In some possible implementations, the circulation unit further includes a second connecting valve, which is connected between the first connecting valve and the input end of the preheating box, and the second connecting valve is also in communication with the external environment;

[0020] The second connecting valve is used to control the connection between one of the input end of the preheating box, the drying chamber and the external environment and the other two.

[0021] In some possible implementations, the second connection valve includes a fourth port, a fifth port, and a sixth port, wherein one of the fourth port, the fifth port, and the sixth port is selectively connected to one of the other two.

[0022] The fourth port is connected to the input end of the preheating box, the fifth port is connected to the first connecting valve, and the sixth port is connected to the external environment.

[0023] In some possible implementations, the circulation unit further includes a second connecting valve, which is connected to the end of the first connecting valve away from the input end of the preheating box and communicates with the drying chamber and the external environment. The second connecting valve is used to control the drying chamber to selectively communicate with either the first connecting valve or the external environment.

[0024] In some possible implementations, the second connecting valve includes a fourth port, a fifth port, and a sixth port, wherein the fourth port is selectively connected to one of the fifth port and the sixth port;

[0025] The fourth port is connected to the drying chamber, the fifth port is connected to the first connecting valve, and the sixth port is connected to the external environment.

[0026] In some possible implementations, the circulation unit further includes a first filter connected to the end of the first connecting valve away from the input end of the preheating box and in communication with the drying chamber.

[0027] In addition, this application also provides a washing device, including the drying apparatus provided in the above embodiments.

[0028] The beneficial effects of this application are as follows: The drying device provided by this application can lower the boiling point of water by drawing negative pressure into the drying chamber through a negative pressure unit. This allows for low-temperature drying of clothing without causing pulling or friction, thus protecting the clothing and preventing damage caused by high temperatures, friction, and pulling, avoiding unnecessary losses for the user. Furthermore, the circulation unit can replace the gas in the drying chamber, replacing the gas containing a large amount of water vapor with relatively dry gas, thereby accelerating the evaporation of moisture from the clothing, improving drying efficiency, and shortening the user's waiting time. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A schematic diagram of the drying device in Embodiment 2 is shown;

[0031] Figure 2 A schematic diagram of the drying device in Embodiment 3 is shown;

[0032] Figure 3 A schematic diagram of the drying device in Embodiment 4 is shown;

[0033] Figure 4 A schematic diagram showing the connection relationship of some electrical components of the drying apparatus in some embodiments is shown.

[0034] Explanation of key component symbols:

[0035] 1000-Drying device;

[0036] 100 - Drying drum; 101 - Drying chamber;

[0037] 200 - Circulation unit; 210 - First filter; 220 - Fan; 231 - First control valve; 232 - Second control valve; 233 - Third control valve; 234 - Fifth control valve; 235 - Sixth control valve; 240 - Preheating box; 251 - First branch; 252 - Second branch; 261 - Second connecting valve; 2611 - Fourth port; 2612 - Fifth port; 2613 - Sixth port; 262 - First connecting valve; 2621 - First port; 2622 - Second port; 2623 - Third port;

[0038] 300 - Negative pressure pumping unit; 310 - Vacuum pump; 320 - Second filter; 330 - Fourth control valve;

[0039] 410 - Control unit; 420 - Pressure sensor; 430 - Heating element. Detailed Implementation

[0040] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0041] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0043] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction 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.

[0044] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] Example 1

[0046] like Figures 1 to 3 As shown, the embodiment provides a drying device 1000, which can be used to dry clothes at low temperature.

[0047] In some embodiments, the drying apparatus 1000 includes a drying drum 100, a negative pressure unit 300, and a circulation unit 200.

[0048] The drying drum 100 includes a drying chamber 101 for holding clothes. A negative pressure unit 300 and a circulation unit 200 are both connected to the drying chamber 101. The negative pressure unit 300 is used to create a negative pressure in the drying chamber 101. The circulation unit 200 is used to introduce heated gas into the drying chamber 101 and exhaust the gas from the drying chamber 101 for gas circulation.

[0049] When using the drying device 1000 to dry clothes, the negative pressure unit 300 can create a negative pressure in the drying chamber 101. This negative pressure environment lowers the boiling point of water, allowing it to evaporate into water vapor at a lower temperature for low-temperature drying of clothes. This process prevents pulling and friction on the clothes, thus protecting them. Consequently, damage to clothes caused by high temperatures, friction, and pulling is avoided, preventing unnecessary losses for the user.

[0050] In addition, the circulation unit 200 can deliver the heated gas to the drying chamber 101 and discharge the gas in the drying chamber 101 to achieve gas circulation, thereby accelerating the evaporation of moisture in the clothes, improving the drying efficiency of the clothes, and shortening the user's waiting time.

[0051] Example 2

[0052] like Figure 1 As shown, the embodiment provides a drying device 1000, which, based on embodiment one, further includes:

[0053] In some embodiments, the circulation unit 200 may include a fan 220 and a first filter 210. The input end of the first filter 210 may be in communication with the drying chamber 101 and / or the external environment. The output end of the first filter 210 may be in communication with the input end of the fan 220. The first filter 210 can dry and filter the flowing gas to reduce the moisture content in the gas. The output end of the fan 220 is in communication with the drying chamber 101. The fan 220 can serve as a power source in the circulation unit 200, driving the gas flow within the circulation unit 200.

[0054] During operation, the circulation unit 200 can obtain gas from the external environment and / or the drying chamber 101, and the first filter 210 dries and filters the flowing gas to remove moisture. The dried gas can then enter the drying chamber 101 through the fan 220 to replace the gas mixed with a large amount of water vapor in the drying chamber 101, thereby increasing the evaporation of moisture from the clothes and improving drying efficiency.

[0055] In some embodiments, the circulation unit 200 further includes a preheating chamber 240. The preheating chamber 240 may be disposed between the input end of the fan 220 and the output end of the first filter 210. Correspondingly, the output end of the first filter 210 may be connected to the input end of the preheating chamber 240. The output end of the preheating chamber 240 may be connected to the input end of the fan 220.

[0056] The preheating chamber 240 can preheat the gas flowing through it, so that the temperature of the gas entering the drying chamber 101 is approximately the same as the temperature inside the drying chamber 101, reducing the temperature fluctuation inside the drying chamber 101, ensuring the evaporation efficiency of moisture in the clothes, and improving the drying efficiency.

[0057] In some embodiments, a first control valve 231 is further provided between the output end of the fan 220 and the drying chamber 101. The first control valve 231 can be used to control the on / off connection between the drying chamber 101 and the output end of the fan 220. In some embodiments, the first control valve 231 may be a two-way solenoid valve.

[0058] In other embodiments, the first control valve 231 may also be a manual valve or the like.

[0059] In some embodiments, the connection point between the end of the circulation unit 200 near the first control valve 231 and the drying drum 100 can be located near the bottom end of the drying drum 100. Thus, when the circulation unit 200 inputs drying gas into the drying chamber 101, the drying gas can pass between the clothes to remove water vapor from the surface of the clothes, further accelerating the drying rate.

[0060] In some embodiments, the circulation unit 200 may include a first branch 251 and a second branch 252. The input end of the first branch 251 may be connected to the drying chamber 101. The input end of the second branch 252 may be connected to the external environment. In addition, the output ends of the first branch 251 and the output ends of the second branch 252 are both connected to the input end of the first filter 210.

[0061] In some embodiments, the connection point between the first branch 251 and the drying barrel 100 can be located near the top end of the drying barrel 100 so that the gas mixed with a large amount of water vapor in the drying barrel 100 can smoothly enter the first branch 251.

[0062] In some embodiments, a second control valve 232 is further provided on the first branch 251, which can be used to control the on / off state of the first branch 251. A third control valve 233 is further provided on the second branch 252, which can be used to control the on / off state of the second branch 252. In some embodiments, both the second control valve 232 and the third control valve 233 can be selected as two-way solenoid valves.

[0063] In other embodiments, the second control valve 232 and the third control valve 233 may also be configured as manual valves or similar structures.

[0064] In some embodiments, the negative pressure unit 300 may include a vacuum pump 310 and a fourth control valve 330 connected to each other. The end of the fourth control valve 330 away from the vacuum pump 310 may be connected to the drying chamber 101. The end of the vacuum pump 310 away from the fourth control valve 330 may be connected to the external environment. The fourth control valve 330 can be used to control the connection between the pipeline containing the vacuum pump 310 and the drying chamber 101. In some embodiments, the fourth control valve 330 may be a two-way solenoid valve.

[0065] In other embodiments, the fourth control valve 330 may also be a manual valve or similar structure.

[0066] When it is necessary to evacuate the drying chamber 101, the vacuum pump 310 and the fourth control valve 330 can be turned on. The vacuum pump 310 can gradually extract the gas in the drying chamber 101 to create a negative pressure environment inside the drying chamber 101.

[0067] In some embodiments, the negative pressure unit 300 further includes a second filter 320. The second filter 320 may be connected between the vacuum pump 310 and the fourth control valve 330. In this embodiment, the second filter 320 can filter out moisture in the flowing gas, preventing airflow containing excessive moisture from passing through the vacuum pump 310 and causing corrosion damage to the vacuum pump 310, thereby extending the service life of the vacuum pump 310 and the drying device 1000.

[0068] like Figure 1 and Figure 4 As shown, in some embodiments, the drying apparatus 1000 may further include a control unit 410, which is electrically connected to other electrical components in the drying apparatus 1000. Thus, the control unit 410 can control the operation of the other electrical components.

[0069] In some embodiments, the drying apparatus 1000 further includes a heating element 430, which may be disposed on one side of the drying drum 100. The heating element 430 can heat the drying chamber 101 to accelerate the evaporation of moisture from the clothes and improve drying efficiency.

[0070] In some embodiments, the heating element 430 may be a structure such as an electric heating wire, an electric heating plate, an electric heating rod, an electric heating tube, or an electric heating mesh.

[0071] In some embodiments, a pressure sensor 420 is also provided in the drying chamber 101, which can be used to detect the pressure in the drying chamber 101.

[0072] During the use of the drying device 1000, the vacuum unit 300 can be turned on first to draw negative pressure into the drying chamber 101, thereby lowering the boiling point of water and achieving low-temperature drying. Additionally, the heating element 430 can be turned on to heat the drying chamber 101, accelerating the evaporation of moisture from the clothes. Afterwards, the vacuum pump 310 can be turned off, and the circulation unit 200 can be turned on to replace the gas mixed with water vapor in the drying chamber 101.

[0073] During the operation of the circulation unit 200, the first control valve 231 can be in the open state, and the first branch 251 and the second branch 252 can be connected either one or both.

[0074] When the first branch 251 is connected and the second branch 252 is closed, the gas mixed with a large amount of water vapor in the drying chamber 101 can enter the first branch 251 under the action of the fan 220, and then pass through the first filter 210, the preheating box 240, and the fan 220 in sequence. The first filter 210 absorbs the water vapor in the flowing gas, thereby drying it. The preheating box 240 heats the flowing gas to ensure that the temperature of the gas entering the drying chamber 101 is essentially the same as the temperature inside the drying chamber 101. This increases the evaporation rate of moisture from the clothes in the drying chamber 101, accelerating the drying efficiency. During this process, the pressure in the drying chamber 101 remains essentially constant, meaning that the drying chamber 101 is essentially maintained in a negative pressure environment. If the pressure in the drying chamber 101 is greater than the required negative pressure by a preset pressure difference, the circulation unit 200 can be stopped, and the vacuum unit 300 can be started to draw the drying chamber 101 to the required negative pressure environment. Then, the vacuum unit 300 is turned off, and the circulation unit 200 is started. That is, during the drying process, the vacuum unit 300 and the circulation unit 200 can be operated alternately as needed.

[0075] When the second branch 252 is connected and the first branch 251 is closed, air from the external environment can enter the second branch 252 under the action of the fan 220, and then enter the circulation unit 200. The air entering the circulation unit 200 passes sequentially through the first filter 210, the preheating box 240, and the fan 220 before entering the drying chamber 101. The first filter 210 absorbs water vapor in the flowing air, thus drying it. The preheating box 240 heats the flowing air to ensure that the temperature of the air entering the drying chamber 101 is essentially consistent with the temperature inside the drying chamber 101, reducing temperature fluctuations and ensuring the evaporation rate of moisture from the clothes, thereby ensuring the drying speed. After the circulation unit 200 has been running for a period of time, the pressure inside the drying chamber 101 will gradually increase due to the continuous input of external gas. When the pressure inside the drying chamber 101 is greater than the required negative pressure and the preset pressure difference, the circulation unit 200 can be stopped and the negative pressure extraction unit 300 can be started to extract the negative pressure in the drying chamber 101 to the required negative pressure environment. Then, the negative pressure extraction unit 300 can be turned off and the circulation unit 200 can be started. This allows the negative pressure extraction unit 300 and the circulation unit 200 to be operated alternately to accelerate the evaporation of moisture from the clothes in the drying chamber 101 and improve drying efficiency.

[0076] When both the first branch 251 and the second branch 252 are connected, the gas mixed with a large amount of water vapor in the drying chamber 101, along with the gas from the external environment, can be simultaneously input into the circulation unit 200. The gas entering the circulation unit 200 passes sequentially through the first filter 210, the preheating chamber 240, and the fan 220 before entering the drying chamber 101. The first filter 210 absorbs the water vapor in the flowing gas, thus drying it. The preheating chamber 240 heats the flowing gas to ensure that the temperature of the gas entering the drying chamber 101 is essentially consistent with the temperature inside the drying chamber 101, preventing large temperature fluctuations and ensuring the evaporation rate of moisture from the clothes, thereby ensuring the drying rate. After the circulation unit 200 has been running for a period of time, the pressure inside the drying chamber 101 will gradually increase. When the pressure inside the drying chamber 101 is greater than the required negative pressure of the drying chamber 101 by a preset pressure difference, the circulation unit 200 can be stopped and the negative pressure extraction unit 300 can be started to extract the negative pressure of the drying chamber 101 to the required negative pressure environment. Then, the negative pressure extraction unit 300 is turned off and the circulation unit 200 is started. This allows the negative pressure extraction unit 300 and the circulation unit 200 to be operated alternately to accelerate the evaporation of moisture from the clothes inside the drying chamber 101 and improve drying efficiency.

[0077] After drying is complete, the second control valve 232 and the third control valve 233 can be opened to connect the drying chamber 101 with the external environment, thereby depressurizing the dryer and making the pressure in the drying chamber 101 consistent with atmospheric pressure, so that the user can open the drying drum 100 and take out the clothes.

[0078] Example 3

[0079] like Figure 2 As shown, the embodiment provides a drying device 1000, which, based on embodiment one, further includes:

[0080] In some embodiments, the circulation unit 200 includes a second connecting valve 261, a fan 220, and a preheating box 240. The preheating box 240 can be connected between the second connecting valve 261 and the input end of the fan 220. The output end of the fan 220 can communicate with the drying chamber 101. The fan 220 can serve as a power source in the circulation unit 200. The second connecting valve 261 includes a fourth port 2611, a fifth port 2612, and a sixth port 2613. One of the fourth port 2611, the fifth port 2612, and the sixth port 2613 can be selectively connected to the other two. The fourth port 2611 can be connected to the input end of the preheating box 240, the fifth port 2612 can communicate with the drying chamber 101, and the sixth port 2613 can communicate with the external environment. In some embodiments, the second connecting valve 261 can be a three-way solenoid valve.

[0081] In some embodiments, the circulation unit 200 further includes a first connecting valve 262 and a first filter 210. The first connecting valve 262 may be connected between the fifth port 2612 of the second connecting valve 261 and the drying drum 100. The first filter 210 may be located between the first connecting valve 262 and the drying drum 100, and the input end of the first filter 210 may communicate with the drying chamber 101 of the drying drum 100.

[0082] In this embodiment, the first connecting valve 262 may include a first port 2621, a second port 2622, and a third port 2623. One of the first port 2621, the second port 2622, and the third port 2623 may be connected to one of the other two. In some embodiments, the first port 2621 is connected to the drying chamber 101, the second port 2622 may be connected to the fifth port 2612 of the second connecting valve 261, and the third port 2623 may be connected to the input terminal of the negative pressure unit 300. Additionally, the output terminal of the negative pressure unit 300 may be connected to the external environment. In some embodiments, the second connecting valve 261 may be a three-way solenoid valve.

[0083] In some embodiments, the circulation unit 200 further includes a fifth control valve 234 and a sixth control valve 235. The fifth control valve 234 can be connected between the first filter 210 and the drying chamber 100, and can be used to control the on / off connection between the drying chamber 101 and the first filter 210. The sixth control valve 235 can be connected between the output end of the fan 220 and the drying chamber 100, and can be used to control the on / off connection between the drying chamber 101 and the fan 220. In some embodiments, the fifth control valve 234 and the sixth control valve 235 can be selected as two-way solenoid valves.

[0084] In other embodiments, the fifth control valve 234 and the sixth control valve 235 may also be manual valves.

[0085] In some embodiments, the connection point between the end of the circulation unit 200 near the fifth control valve 234 and the drying barrel 100 can be set near the top end of the drying barrel 100 so that the gas mixed with a large amount of water vapor in the drying barrel 100 can smoothly enter the circulation unit 200.

[0086] The connection point between the end of the circulation unit 200 near the sixth control valve 235 and the drying drum 100 can be located near the bottom of the drying drum 100. Therefore, when the circulation unit 200 inputs drying gas into the drying chamber 101, the drying gas can pass between the clothes to remove water vapor from the surface of the clothes, further accelerating the drying rate.

[0087] In some embodiments, the negative pressure unit 300 may include a vacuum pump 310, the input end of which may be connected to the third port 2623 of the first connecting valve 262, and the output end of the vacuum pump 310 is connected to the external environment.

[0088] like Figure 2 and Figure 4 As shown, in this embodiment, the drying device 1000 may further include a control unit 410 and a heating element 430. The control unit 410 may be electrically connected to other electrical components in the drying device 1000. Thus, the control unit 410 can control the operation of other electrical components. The heating element 430 may be disposed on one side of the drying drum 100. The heating element 430 can heat the drying chamber 101 to accelerate the evaporation of moisture from the clothing and improve drying efficiency. In some embodiments, the heating element 430 may be a structure such as an electric heating wire, an electric heating plate, an electric heating rod, an electric heating tube, or an electric heating mesh.

[0089] In addition, a pressure sensor 420 is also installed in the drying chamber 101, which can be used to detect the pressure in the drying chamber 101.

[0090] During the use of the drying device 1000, the fifth control valve 234 can be opened to connect the first port 2621 and the third port 2623 of the first connecting valve 262, and the vacuum pump 310 can be started to draw negative pressure into the drying chamber 101. Afterwards, the vacuum pump 310 can be turned off, and the preheating box 240, the fan 220, and the sixth control valve 235 in the circulation unit 200 can be opened to start the circulation unit 200. The preheating box 240 can also be opened when the vacuum pump 310 draws negative pressure into the drying chamber 101 for preheating.

[0091] During the operation of the circulation unit 200, the first port 2621 of the first connecting valve 262 and the second port 2622 can be connected, and the fourth port 2611 of the second connecting valve 261 and the fifth port 2612 can be connected, so that the circulation unit 200 and the drying chamber 101 form an internal circulation loop, and the fan 220 and the preheating box 240 are started. Under the action of the fan 220, the gas mixed with a large amount of water vapor in the drying chamber 101 can enter the circulation unit 200. When the gas passes through the first filter 210, the first filter 210 can filter and dry the gas flowing through it to remove the water vapor in the airflow. The preheating box 240 can preheat the dried gas, and then send the dried and heated gas back to the drying chamber 101 to replace the gas in the drying chamber 101. During operation, when the pressure in the drying chamber 101 is greater than the required negative pressure and the preset pressure difference, the circulation unit 200 can be stopped, the vacuum pump 310 can be started, and the first connecting valve 262 can be switched to connect the first port 2621 and the third port 2623 to draw the drying chamber 101 to the required negative pressure environment. Then, the vacuum pump 310 is turned off, the circulation unit 200 is started, and the first port 2621 and the second port 2622 of the first connecting valve 262 are adjusted to connect. During the drying process, the negative pressure unit 300 and the circulation unit 200 can be operated alternately as needed.

[0092] Additionally, during the operation of the circulation unit 200, the first port 2621 and the third port 2623 of the first connecting valve 262 can be connected, and the fourth port 2611 and the sixth port 2613 of the second connecting valve 261 can be connected, forming an external circulation loop between the circulation unit 200, the drying chamber 101, and the external environment. This activates the fan 220 and the preheating box 240, and simultaneously turns on the vacuum pump 310. Gas from the external environment can enter the circulation unit 200 through the second connecting valve 261 under the action of the fan 220, and after preheating in the preheating box 240, it enters the drying chamber 101. The gas in the drying chamber 101, mixed with a large amount of water vapor, can be discharged to the external environment after passing through the first filter 210, the first connecting valve 262, and the vacuum pump 310. Thus, the gas in the drying chamber 101 mixed with a large amount of water vapor can be replaced with relatively dry hot gas, accelerating the evaporation of moisture from the clothes and improving drying efficiency. In this embodiment, the circulation unit 200 can be opened intermittently. When the circulation unit 200 stops, the vacuum pump 310 can draw negative pressure into the drying chamber 101 to achieve low-temperature drying.

[0093] After drying is complete, the fifth control valve 234 can be opened, the first port 2621 of the first connecting valve 262 and the second port 2622 are connected, and the fifth port 2612 of the second connecting valve 261 and the sixth port 2613 are connected, so that the drying chamber 101 is connected to the external environment, so as to depressurize the drying chamber 101 and make the pressure in the drying chamber 101 consistent with the atmospheric pressure, so that the user can open the drying drum 100 and take out the clothes.

[0094] In this embodiment, the first filter 210 is always located upstream of the vacuum pump 310, thereby preventing gas mixed with a large amount of water vapor from passing through the vacuum pump 310 and causing corrosion damage, thus extending the service life of the vacuum pump 310. Additionally, when the circulation unit 200 is in internal circulation, the first filter 210 can also be located upstream of the fan 220 to prevent water vapor from passing through the fan 220 and causing corrosion damage, correspondingly extending the service life of the fan 220.

[0095] Example 4

[0096] like Figure 3 As shown, this embodiment provides a drying device 1000, which differs from Embodiment 3 in the following ways:

[0097] The second connecting valve 261 can also be connected between the input end of the first filter 210 and the drying chamber 100. The fourth port 2611 of the second connecting valve 261 can be connected to the drying chamber 101, the fifth port 2612 can be connected to the input end of the first filter 210, and the sixth port 2613 can be connected to the external environment.

[0098] During the operation of the circulation unit 200, the first port 2621 of the first connecting valve 262 can be connected to the second port 2622, and the fourth port 2611 of the second connecting valve 261 can be connected to the fifth port 2612, forming a circulation loop between the circulation unit 200 and the drying chamber 101. The fan 220 and the preheating box 240 are then activated. Under the action of the fan 220, gas mixed with a large amount of water vapor in the drying chamber 101 enters the circulation unit 200. When the gas passes through the first filter 210, it is filtered and dried to remove water vapor. The preheating box 240 preheats the dried gas, and then returns the dried and heated gas to the drying chamber 101, thus replacing the gas in the drying chamber 101.

[0099] During operation, when the pressure in the drying chamber 101 is greater than the required negative pressure and the preset pressure difference, the fan 220 in the circulation unit 200 can be stopped, the vacuum pump 310 can be started, and the first connecting valve 262 can be switched to connect the first port 2621 and the third port 2623 to draw the drying chamber 101 to the required negative pressure environment. After that, the vacuum pump 310 is turned off, and the circulation unit 200 is started. During the drying process, the negative pressure unit 300 and the circulation unit 200 can be operated alternately as needed.

[0100] In addition, after drying is completed, the fourth port 2611 and the sixth port 2613 of the second connecting valve 261 can be connected. Even if the drying chamber 101 is connected to the external environment, the drying chamber 101 can be depressurized so that the user can open the drying drum 100 and take out the clothes smoothly.

[0101] The embodiment also provides a washing device, which may include the drying device 1000 provided in the embodiment.

[0102] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0103] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A drying apparatus, characterized in that, include: A drying drum (100) is equipped with a drying chamber (101); A negative pressure unit (300) is connected to the drying chamber (101); A circulation unit (200) is connected to the drying chamber (101). The circulation unit (200) is used to input the heated gas into the drying chamber (101) and discharge the gas in the drying chamber (101) for gas circulation.

2. The drying apparatus according to claim 1, characterized in that, The circulation unit (200) includes a preheating box (240) and a fan (220). The input end of the preheating box (240) is connected to the drying chamber (101) and / or the external environment. The output end of the preheating box (240) is connected to the input end of the fan (220). The output end of the fan (220) is connected to the drying chamber (101).

3. The drying apparatus according to claim 2, characterized in that, The circulation unit (200) further includes a first control valve (231), which is connected between the output end of the fan (220) and the drying chamber (101).

4. The drying apparatus according to claim 2, characterized in that, The circulation unit (200) further includes a first branch (251) and a second branch (252). The input end of the first branch (251) is connected to the drying chamber (101), and the input end of the second branch (252) is connected to the external environment. The output ends of the first branch (251) and the second branch (252) are both connected to the input end of the preheating box (240).

5. The drying apparatus according to claim 4, characterized in that, A second control valve (232) is provided on the first branch (251), and a third control valve (233) is also provided on the second branch (252); The drying device further includes a control unit (410), which is electrically connected to the second control valve (232) and the third control valve (233) respectively. The control unit (410) is capable of controlling at least one of the second control valve (232) and the third control valve (233) to be turned on.

6. The drying apparatus according to any one of claims 2 to 5, characterized in that, The circulation unit (200) further includes a first filter (210), the input end of which is connected to the drying chamber (101) and / or the external environment, and the output end of which is connected to the input end of the preheating box (240).

7. The drying apparatus according to claim 1, characterized in that, The circulation unit (200) further includes a first connecting valve (262), a fan (220), and a preheating box (240). The preheating box (240) is connected between the first connecting valve (262) and the input end of the fan (220). The output end of the fan (220) is connected to the drying chamber (101). The first connecting valve (262) is also connected to the negative pressure extraction unit (300). The first connecting valve (262) is used to control the connection between the drying chamber (101) and the input end of the preheating box (240) and the negative pressure unit (300).

8. The drying apparatus according to claim 7, characterized in that, The first connecting valve (262) includes a first port (2621), a second port (2622) and a third port (2623), wherein the first port (2621) is selectively connected to one of the second port (2622) and the third port (2623); The first port (2621) is connected to the drying chamber (101), the second port (2622) is connected to the input end of the preheating box (240), and the third port (2623) is connected to the negative pressure unit (300).

9. The drying apparatus according to claim 7, characterized in that, The circulation unit (200) further includes a second connecting valve (261), which is connected between the first connecting valve (262) and the input end of the preheating box (240). The second connecting valve (261) is also connected to the external environment. The second connecting valve (261) is used to control the connection between one of the input end of the preheating box (240), the drying chamber (101) and the external environment and the other two.

10. The drying apparatus according to claim 9, characterized in that, The second connecting valve (261) includes a fourth port (2611), a fifth port (2612), and a sixth port (2613), wherein one of the fourth port (2611), the fifth port (2612), and the sixth port (2613) is connected to one of the other two. The fourth port (2611) is connected to the input end of the preheating box (240), the fifth port (2612) is connected to the first connecting valve (262), and the sixth port (2613) is connected to the external environment.

11. The drying apparatus according to claim 7, characterized in that, The circulation unit (200) further includes a second connecting valve (261), which is connected to the end of the first connecting valve (262) away from the input end of the preheating box (240) and communicates with the drying chamber (101) and the external environment. The second connecting valve (261) is used to control the drying chamber (101) to communicate with either the first connecting valve (262) or the external environment.

12. The drying apparatus according to claim 11, characterized in that, The second connecting valve (261) includes a fourth port (2611), a fifth port (2612), and a sixth port (2613), wherein the fourth port (2611) is selectively connected to one of the fifth port (2612) and the sixth port (2613); The fourth port (2611) is connected to the drying chamber (101), the fifth port (2612) is connected to the first connecting valve (262), and the sixth port (2613) is connected to the external environment.

13. The drying apparatus according to any one of claims 7 to 12, characterized in that, The circulation unit (200) further includes a first filter (210), which is connected to the end of the first connecting valve (262) away from the input end of the preheating box (240) and communicates with the drying chamber (101).

14. A washing device, characterized in that, Includes the drying apparatus as described in any one of claims 1 to 13.

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