Clothes drying equipment and control method thereof

Abstract

The invention relates to the technical field of household appliances, and discloses clothes drying equipment and a control method thereof, and the clothes drying equipment comprises a clothes processing cavity, a first air duct, a second air duct and a heat exchange device. The air inlet end of the first air duct communicates with the air outlet of the clothes processing cavity, and the air outlet end communicates with the external environment. The air inlet end of the second air duct communicates with the external environment, and the air outlet end communicates with the air inlet of the clothes processing cavity. The heat exchange device is provided with a first heat exchange channel and a second heat exchange channel which do not communicate with each other, the first heat exchange channel communicates with the first air duct, and the second heat exchange channel communicates with the second air duct. Air flow in the first heat exchange channel can exchange heat with air flow in the second heat exchange channel, normal-temperature air in the second air channel is preheated, energy consumed for obtaining dry hot air through heating is reduced, equipment energy consumption is reduced, and the energy utilization rate is increased. And when the heat exchange device is seriously blocked, the clothes drying equipment is controlled to stop, so that the fire hazard can be prevented, the use safety of the clothes drying equipment is improved, and low-efficiency operation is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to a clothes drying device and a control method thereof. BACKGROUND

[0002] Clothes drying devices such as clothes dryers and washer-dryers are commonly used in households. The working principle of a direct exhaust type clothes dryer is to generate hot air through an electric heater or a gas heater, and then send the hot air into a drying drum to evaporate the water in the wet clothes into hot steam, and then directly exhaust the hot steam outside.

[0003] Although the existing direct exhaust type clothes dryer can achieve high exhaust efficiency, it has the following defects: first, the heat energy is wasted seriously, because the wet hot exhaust gas is directly discharged, a large amount of heat energy is lost with the exhaust gas, and is not effectively recycled and utilized, resulting in high energy consumption; second, the energy consumption is high, during the clothes drying process, the device needs to continuously consume electric energy or gas to maintain the supply of hot air, especially in cold environments, the heat loss is intensified, the drying efficiency is reduced, and the overall energy consumption is further increased.

[0004] Therefore, there is an urgent need for a clothes drying device and a control method thereof to solve the above problems. SUMMARY

[0005] Based on the above problems, the purpose of the present application is to provide a clothes drying device and a control method thereof, which can improve the energy utilization rate of the clothes drying device, reduce the energy consumption of the clothes drying device, and improve the use safety of the clothes drying device.

[0006] To achieve the above purpose, the present application adopts the following technical scheme:

[0007] On the one hand, a clothes drying device is provided, comprising:

[0008] a clothes treatment cavity having an air inlet and an air outlet;

[0009] a first air duct, the air inlet end of the first air duct being communicated with the air outlet, and the air outlet end of the first air duct being communicated with an external environment;

[0010] a second air duct, the air inlet end of the second air duct being communicated with the external environment, and the air outlet end of the second air duct being communicated with the air inlet;

[0011] a heat exchange device provided with a first heat exchange channel and a second heat exchange channel which are not communicated with each other and intersect each other, the first heat exchange channel being communicated with the first air duct and located between the air inlet end and the air outlet end of the first air duct, the second heat exchange channel being communicated with the second air duct and located between the air inlet end and the air outlet end of the second air duct, and the airflow in the first heat exchange channel being capable of exchanging heat with the airflow in the second heat exchange channel.

[0012] As an optional solution of the clothes drying device, the clothes drying device further comprises an auxiliary air duct, the auxiliary air duct has a first end and a second end, the first end selectively communicates with the first air duct and is located upstream of the first heat exchange passage, and the second end communicates with the first air duct and is located downstream of the first heat exchange passage.

[0013] As an optional solution of the clothes drying device, the first end of the auxiliary air duct is provided with a movable baffle at the communication position with the first air duct, and the baffle can block or open the auxiliary air duct.

[0014] As an optional solution of the clothes drying device, the heat exchange device comprises a box structure, the box structure is provided with a plurality of first branch passages extending in a first direction and a plurality of second branch passages extending in a second direction, and the plurality of second branch passages are arranged in the third direction in sequence with the plurality of first branch passages.

[0015] The first heat exchange passage comprises a plurality of first branch passages, the second heat exchange passage comprises a plurality of second branch passages, the first direction intersects with the second direction, and the third direction is perpendicular to the first direction and the second direction.

[0016] As an optional solution of the clothes drying device, the first air duct is provided with a first filter between the heat exchange device and the air outlet of the clothes treatment cavity.

[0017] The second air duct is provided with a first fan between the heat exchange device and the air inlet of the clothes treatment cavity.

[0018] And / or, the second air duct is provided with a second fan between the heat exchange device and the air inlet end of the second air duct.

[0019] And / or, the air inlet end of the second air duct is provided with a second filter.

[0020] As an optional solution of the clothes drying device, when the first air duct is provided with a first filter, the clothes drying device further comprises a device box, the device box is provided with a first mounting port, the first air duct is provided with a second mounting port at a position corresponding to the first mounting port, and the first filter is detachably mounted on the first air duct through the first mounting port and the second mounting port.

[0021] As an optional solution of the clothes drying device, the clothes drying device further comprises a drying drum and a heating device, the clothes treatment cavity is formed in the drying drum, the air outlet is arranged at the front end of the drying drum, and the air inlet is arranged at the rear end of the drying drum.

[0022] The heating device comprises a heating element and a cover, the cover is arranged at the rear end of the drying cylinder and forms a heating cavity with the drying cylinder, the heating element is located in the heating cavity, and the heating cavity is in communication with the second air duct and the air inlet.

[0023] As an optional solution of the drying apparatus, the first air duct comprises a first air outlet section and a second air outlet section, one end of the first air outlet section is in communication with the air outlet, and the other end is in communication with the air inlet end of the first heat exchange channel; one end of the second air outlet section is connected to the air outlet end of the first heat exchange channel, and the other end is in communication with the external environment.

[0024] And / or, the second air duct comprises a first air inlet section and a second air inlet section, one end of the first air inlet section is in communication with the external environment, and the other end is in communication with the air inlet end of the second heat exchange channel, one end of the second air inlet section is in communication with the air outlet end of the second heat exchange channel, and the other end is in communication with the air inlet.

[0025] On the other hand, a drying apparatus control method is provided, which is applied to the drying apparatus as described above, and comprises the following steps:

[0026] obtaining a drying program;

[0027] controlling the drying apparatus to operate according to the drying program;

[0028] detecting the degree of blockage at the heat exchange device;

[0029] when the degree of blockage at the heat exchange device exceeds a set threshold, controlling the drying apparatus to stop.

[0030] As an optional solution of the drying apparatus control method, the step of "detecting the degree of blockage at the heat exchange device" comprises:

[0031] detecting the air volume information of the first air duct downstream of the first heat exchange channel;

[0032] determining the degree of blockage at the heat exchange device according to the air volume information;

[0033] Or,

[0034] The drying apparatus further comprises an auxiliary air duct, the air inlet end of the auxiliary air duct is in communication with the first air duct and located upstream of the first heat exchange channel, and the air inlet end of the auxiliary air duct is provided with a movable baffle, and the baffle can block or open the auxiliary air duct.

[0035] The step of "detecting the degree of blockage at the heat exchange device" comprises:

[0036] detecting the opening of the baffle;

[0037] determining the degree of blockage of the heat exchange device according to the opening of the baffle.

[0038] The present application has the following advantages:

[0039] The drying clothes equipment provided by the present application, when executing the drying clothes program, the dry hot air is introduced from the air inlet of the clothes treatment cavity to contact with the wet clothes in the clothes treatment cavity to take away the moisture of the clothes, the wet hot air generated in the clothes treatment cavity is introduced into the first air duct through the air outlet, and the external environment air is continuously supplied from the second air duct to the air inlet of the clothes treatment cavity and heated to form dry air, so that the air flow can be circulated. Since the first heat exchange channel is communicated with the first air duct, and the second heat exchange channel is communicated with the second air duct, the wet hot air flows in the first heat exchange channel, and the normal temperature air flows in the second heat exchange channel. When the wet hot air in the first air duct flows through the first heat exchange channel, the wet hot air exchanges heat with the normal temperature air in the second heat exchange channel at the first heat exchange channel, so that the normal temperature air in the second air duct is preheated at the second heat exchange channel, and then the air reaching the air inlet is preheated in advance, which can reduce the energy consumption required for heating to obtain dry hot air, and reduce the energy consumption of the drying clothes equipment. At the same time, the heat of the wet hot air discharged from the clothes treatment cavity is recycled and utilized, so that the energy utilization rate is improved. That is, the drying clothes equipment can not only recycle the waste heat of the air flow discharged from the clothes treatment cavity and improve the energy utilization rate, but also reduce the energy required for heating to obtain dry hot air, and reduce the overall energy consumption of the drying clothes equipment.

[0040] The drying clothes equipment control method provided by the present application can detect the degree of blockage of the heat exchange device, and control the drying clothes equipment to stop when the degree of blockage exceeds the set threshold, which can prevent the drying clothes equipment from catching fire due to poor air flow circulation and delayed heat release, improve the use safety of the drying clothes equipment, avoid low efficiency operation of the drying clothes equipment, reduce the energy consumption of the drying clothes equipment, and prolong the service life of the drying clothes equipment. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the present application and the drawings.

[0042] Figure 1 is a structural schematic diagram of the drying clothes equipment provided by the present application;

[0043] Figure 2is a first exploded schematic view of the clothes drying apparatus provided in the specific embodiments of the present application;

[0044] Figure 3 is a first internal structure schematic view of the clothes drying apparatus provided in the specific embodiments of the present application

[0045] Figure 4 is a second internal structure schematic view of the clothes drying apparatus provided in the specific embodiments of the present application;

[0046] Figure 5 is a second exploded schematic view of the clothes drying apparatus provided in the specific embodiments of the present application (with the apparatus cabinet hidden);

[0047] Figure 6 is a first cross-sectional view of the clothes drying apparatus provided in the specific embodiments of the present application (with the apparatus cabinet hidden);

[0048] Figure 7 is a cross-sectional view of the clothes drying apparatus provided in the specific embodiments of the present application when the auxiliary air duct is not conducted;

[0049] Figure 8 is a cross-sectional view of the clothes drying apparatus provided in the specific embodiments of the present application when the auxiliary air duct is conducted;

[0050] Figure 9 is Figure 6 is a local enlarged view at A in FIG. 8;

[0051] Figure 10 is a second cross-sectional view of the clothes drying apparatus provided in the specific embodiments of the present application (with the apparatus cabinet hidden);

[0052] Figure 11 is a third cross-sectional view of the clothes drying apparatus provided in the specific embodiments of the present application (with the apparatus cabinet hidden);

[0053] Figure 12 is a first flow chart of the clothes drying apparatus control method provided in the specific embodiments of the present application;

[0054] Figure 13 is a second flow chart of the clothes drying apparatus control method provided in the specific embodiments of the present application;

[0055] Figure 14 is a third flow chart of the clothes drying apparatus control method provided in the specific embodiments of the present application.

[0056] in the drawings:

[0057] 1, drying cylinder; 2, first air duct; 3, second air duct; 4, heat exchange device; 5, auxiliary air duct; 6, first filter; 7, first air fan; 8, second air fan; 9, second filter; 10, heating device; 20, apparatus cabinet; 30, door body;

[0058] 11, clothes processing cavity; 12, air inlet; 121, through hole; 13, air outlet; 14, clothes feeding port;

[0059] 21, first air outlet section; 22, second air outlet section;

[0060] 211, second mounting port; 212, clamping groove;

[0061] 31, first air inlet section; 32, second air inlet section;

[0062] 321, straight section; 322, curved section;

[0063] 41, first heat exchange channel; 42, second heat exchange channel;

[0064] 411, first branch channel; 421, second branch channel;

[0065] 51, baffle;

[0066] 61, frame structure; 611, operation part; 62, filter screen;

[0067] 101, heating piece; 102, cover shell; 103, heating cavity;

[0068] 201, first mounting port; 202, third mounting port; 203, fourth mounting port. DETAILED DESCRIPTION

[0069] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects reached more clear, the technical solutions of the embodiments of the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0070] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0071] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention.

[0072] Example 1

[0073] like Figure 1 and Figure 2 As shown, this embodiment provides a clothes drying device that can improve the safety of the clothes drying device and reduce the energy consumption of the clothes drying device. The clothes drying device includes a clothes processing chamber 11, a first air duct 2, a second air duct 3 and a heat exchange device 4.

[0074] Among them, see Figure 3 、 Figure 4 and Figure 5 The clothing processing chamber 11 has an air inlet 12 and an air outlet 13. The air inlet end of the first air duct 2 is connected to the air outlet 13, and the air outlet end of the first air duct 2 is connected to the external environment. The air inlet end of the second air duct 3 is connected to the external environment, and the air outlet end of the second air duct 3 is connected to the air inlet 12. The heat exchange device 4 is provided with a first heat exchange channel 41 and a second heat exchange channel 42 that are not connected to each other but intersect with each other. The first heat exchange channel 41 is connected to the first air duct 2 and is located between the air inlet and the air outlet of the first air duct 2. The second heat exchange channel 42 is connected to the second air duct 3 and is located between the air inlet and the air outlet of the second air duct 3. The airflow in the first heat exchange channel 41 can exchange heat with the airflow in the second heat exchange channel 42.

[0075] In the clothes drying apparatus provided in this embodiment, during the drying cycle, hot, dry air enters through air inlet 12 of clothing processing chamber 11, where it comes into contact with the wet clothes inside and removes moisture from them. The hot, moist air generated within clothing processing chamber 11 enters first air duct 2 through air outlet 13 and is discharged to the outside environment. Normal-temperature air from the outside environment is continuously supplied to air inlet 12 of clothing processing chamber 11 through second air duct 3, where it is heated and converted into dry air, enabling air circulation.

[0076] Since the first heat exchange passage 41 is in communication with the first air duct 2 and the second heat exchange passage 42 is in communication with the second air duct 3, the first heat exchange passage 41 is in communication with the humid hot air and the second heat exchange passage 42 is in communication with the normal temperature air. When the humid hot air in the first air duct 2 flows through the first heat exchange passage 41, the humid hot air exchanges heat with the normal temperature air in the second heat exchange passage 42, so that the normal temperature air in the second air duct 3 is preheated at the second heat exchange passage 42, and the air reaching the air inlet 12 is preheated in advance, which can reduce the energy consumption for heating to obtain dry hot air and reduce the energy consumption of the clothes drying apparatus. At the same time, the heat of the humid hot air discharged from the clothes treatment cavity 11 is recycled, the heat is fully utilized, the energy utilization rate is improved, the heat of the discharged gas is reduced, and the use safety is improved.

[0077] That is, the clothes drying apparatus can recycle the residual heat of the air flow discharged from the clothes treatment cavity 11, improve the energy utilization rate, reduce the energy required for heating to obtain dry hot air, and reduce the overall energy consumption of the clothes drying apparatus.

[0078] The clothes drying apparatus described above can be a clothes dryer (such as a direct discharge type clothes dryer), a washer-dryer, a clothes care machine, or the like.

[0079] Referring to Figure 5 , Figure 6 and Figure 7 , the clothes drying apparatus further comprises an auxiliary air duct 5, the auxiliary air duct 5 has a first end and a second end, the first end is in selective communication with the first air duct 2 and is located upstream of the first heat exchange passage 41, and the second end is in communication with the first air duct 2 and is located downstream of the first heat exchange passage 41. When the first air duct 2 is blocked at the heat exchange device 4 due to lint and the like, the auxiliary air duct 5 is conducted (as shown in Figure 8 ), part of the air flow in the first air duct 2 can flow through the auxiliary air duct 5, which prevents the first air duct 2 from accumulating heat at the heat exchange device 4 due to blockage to produce high temperature, thereby avoiding the risk of fire and improving the use safety of the clothes drying apparatus. In the case that the first heat exchange passage 41 of the heat exchange device 4 is in good communication, the auxiliary air duct 5 can not be conducted, so that all the humid hot air in the first air duct 2 can flow through the first heat exchange passage 41, ensuring the residual heat recycling efficiency.

[0080] Optionally, referring to Figure 7 and Figure 8The first end of the auxiliary air duct 5 is provided with a movable baffle 51 at the communication position of the first air duct 2, and the baffle 51 can block or open the auxiliary air duct 5. Normally, the baffle 51 is in a state of blocking the auxiliary air duct 5. When the first air duct 2 is seriously blocked at the heat exchange device 4, the air pressure at the upstream of the first heat exchange channel 41 increases, and under the action of the air pressure, the baffle 51 is pushed upward to open the auxiliary air duct 5. The baffle 51 can block the auxiliary air duct 5 when the heat exchange device 4 is not blocked (or not seriously blocked), so as to ensure that all the wet hot air flows through the first heat exchange channel 41, and the heat recovery is ensured to be sufficient. Referring to the orientation in Figure 7 , the right end of the auxiliary air duct 5 is the first end, and the left end of the auxiliary air duct 5 is the second end.

[0081] Optionally, one end (the right end in Figure 8 ) of the baffle 51 can be rotatably connected to the inner wall of the auxiliary air duct 5 through a rotating shaft, and the other end (the left end in Figure 8 ) of the baffle 51 is a free end. When the air pressure is large, the left end of the baffle 51 rotates upward to open the auxiliary air duct 5.

[0082] In other embodiments, a driving member can be drivingly connected with the baffle 51, and the baffle 51 is driven to rotate by the driving member to open or block the auxiliary air duct 5. Alternatively, the baffle 51 can be designed in a translation manner, and the baffle 51 is driven to move left and right by the driving member (referring to the orientation in Figure 8 ) to block or open the auxiliary air duct 5. For example, when it is detected that the heat exchange device 4 is seriously blocked, the baffle 51 is controlled to be opened by the driving member.

[0083] Referring to Figure 5 , Figure 6 and Figure 7 , the heat exchange device 4 includes a box structure, and a plurality of first branch channels 411 extending in a first direction and a plurality of second branch channels 421 extending in a second direction are arranged on the box structure, and the plurality of second branch channels 421 and the plurality of first branch channels 411 are arranged in sequence and staggered in a third direction. The first heat exchange channel 41 includes a plurality of first branch channels 411, and the second heat exchange channel 42 includes a plurality of second branch channels 421. The first direction intersects the second direction, and the third direction is perpendicular to the first direction and the second direction.

[0084] The plurality of first branch channels 411 and the plurality of second branch channels 421 are arranged in sequence and staggered, so that each second branch channel 421 has a first branch channel 411 on both sides, and the normal-temperature air in a single second branch channel 421 can simultaneously exchange heat with the wet hot air of two second branch channels 421, the heat exchange contact area is increased, and thus the heat exchange efficiency can be improved, the waste heat of the wet hot air can be fully recovered, and the energy utilization rate is improved.

[0085] In the embodiment, the first direction, the second direction and the third direction are perpendicular to each other, the length of the first heat exchange channel 41 is the same as the width of the second heat exchange channel 42, and the width of the first heat exchange channel 41 is the same as the length of the second heat exchange channel 42, so as to maximize the heat exchange area of the first heat exchange channel 41 and the second heat exchange channel 42. In other embodiments, the first direction and the second direction can also intersect at an acute angle, as long as the air flow in the first heat exchange channel 41 and the air flow in the second heat exchange channel 42 can exchange heat.

[0086] Referring to Figure 4 , Figure 5 and Figure 6 , the clothes drying device further comprises a drying drum 1 and a heating device 10. The drying drum 1 forms a clothes processing cavity 11 therein. The front end of the drying drum 1 is provided with an air outlet 13, and the rear end of the drying drum 1 is provided with an air inlet 12. The heating device 10 comprises a heating element 101 and a shell 102. The shell 102 is arranged at the rear end of the drying drum 1 and forms a heating cavity 103 with the drying drum 1. The heating element 101 is located in the heating cavity 103. The heating cavity 103 is in communication with the second air duct 3 and the air inlet 12. The second air duct 3 introduces normal temperature air into the heating cavity 103 of the heating device 10. The normal temperature air is heated by the heating element 101 to form dry hot air. The dry hot air is introduced into the drying drum 1 through the air inlet 12 to contact the wet clothes. Arranging the heating device 10 at the rear side of the drying drum 1 can make full use of the space at the rear of the drying drum 1, and at the same time, does not affect the rotation of the drying drum 1.

[0087] In the embodiment, the shell 102 is fixed and connected with the second air duct 3. The drying drum 1 can rotate relative to the shell 102. During the rotation of the drying drum 1, the lifting ribs of the drying drum 1 can lift the clothes, so that the clothes are turned over and fully contact with the dry hot air, thereby improving the drying efficiency.

[0088] Optionally, a plurality of through holes 121 are arranged on the rear end wall of the drying drum 1, and the plurality of through holes 121 form the air inlet 12 of the drying drum 1. The shell 102 is in the shape of a cylinder. The heating cavity 103 formed between the shell 102 and the drying drum 1 can cover the entire rear end surface of the drying drum 1. The dry hot air after heating can enter the drying drum 1 from the plurality of through holes 121 on the rear end surface of the drying drum 1, thereby improving the uniformity of the drying air flow, so that the dry hot air can uniformly contact the wet clothes, thereby improving the drying efficiency.

[0089] Of course, in other embodiments, the shell 102 can also have other shapes, such as a rectangular strip-shaped shell. The shell 102 can also be arranged on the side of the drying drum 1, as long as the air flow circulation requirement can be met.

[0090] Optionally, the heating element 101 can be a heating coil pipe, such as Figure 5As shown, the heating coil is located outside the area where the plurality of through holes 121 are located, so that the dry hot air can enter the drying cylinder 1 more smoothly. In other embodiments, the heating element 101 can also be a heating plate, a heating wire, etc., but is not limited to the types listed above.

[0091] Referring to Figure 2 , Figure 6 and Figure 9 , the first air duct 2 is provided with a first filter 6 located between the heat exchange device 4 and the air outlet 13 of the clothes treatment cavity 11. The first filter 6 is used to filter the lint, fluff and other impurities carried in the hot and humid air, reduce the plugging speed of the first air duct 2 at the heat exchange device 4, and ensure the drying efficiency.

[0092] Optionally, the first filter 6 is detachably arranged on the first air duct 2, facilitating the disassembly and cleaning of the first filter 6. As shown in Figure 2 , the clothes drying device further comprises a device box 20, and the device box 20 is provided with a first mounting port 201. The first air duct 2 is provided with a second mounting port 211 at a position corresponding to the first mounting port 201, and the first filter 6 is detachably mounted on the first air duct 2 through the first mounting port 201 and the second mounting port 211. The user can take out the first filter 6 through the first mounting port 201 to clean or replace the first filter 6.

[0093] Further, referring to Figure 9 , the first air duct 2 is provided with a clamping groove 212 at a position opposite to the second mounting port 211. One end of the first filter 6 inserted into the first air duct 2 can be clamped into the clamping groove 212 to fix the first filter 6, ensuring that the first filter 6 is firmly installed.

[0094] Optionally, referring to Figure 9 , the first filter 6 comprises a frame structure 61 and a filter screen 62 arranged on the frame structure 61. The frame structure 61 is provided with an operating portion 611 exposed outside the device box 20, facilitating the user to grasp and plug the first filter 6. Exemplarily, the operating portion 611 is a knob slot recessed on the frame structure 61, so that the outer end surface of the frame structure 61 does not protrude from the outer surface of the device box 20, ensuring that the outside of the device box 20 is more neat and beautiful.

[0095] In some embodiments, the filter screen 62 can be provided in one layer. In some embodiments, multiple filter screens 62 can also be provided to more effectively remove lint, fluff and other impurities in the hot and humid air through multi-stage filtration.

[0096] As shown in Figure 2 ​As shown, the front end of the drying cylinder 1 has a clothes feeding port 14, and the equipment cabinet 20 of the clothes drying device is provided with a third mounting port 202 at a position corresponding to the clothes feeding port 14, and the outer side of the third mounting port 202 is provided with a door body 30, which is used to block or open the clothes feeding port 14.

[0097] Referring to Figure 1 , Figure 2 and Figure 10 and Figure 11 , the first air duct 3 is provided with a first fan 7, which is located between the heat exchange device 4 and the air inlet 12 of the clothes treatment cavity 11. Under the action of the first fan 7, the normal temperature air of the external environment continuously enters the second air duct 3, so that the normal temperature air is continuously supplied to the air inlet 12 of the clothes treatment cavity 11 and heated. By arranging the first fan 7 between the heat exchange device 4 and the air inlet 12 of the clothes treatment cavity 11, a greater negative pressure can be generated in the second air duct 3, which is more conducive to the entry of air from the external environment into the second air duct 3, and ensures that the hot air efficiently enters the clothes treatment cavity 11. At the same time, the first fan 7 is at a low temperature side, and the working environment is more stable, which can reduce the risk of failure caused by high temperature.

[0098] Optionally, referring to Figure 2 and Figure 3 , the second air duct 3 is provided with a second fan 8, which is located between the heat exchange device 4 and the air inlet end of the second air duct 3. By arranging the second fan 8, the negative pressure strength in the second air duct 3 can be further enhanced, and the air flow in the second air duct 3 can be further enhanced, so as to ensure that the dry hot air entering the clothes treatment cavity 11 is sufficient and the drying efficiency is improved.

[0099] In this embodiment, the second fan 8 is located at the air inlet end of the second air duct 3, which can more stably suck in external air, reduce airflow fluctuation, and provide a relatively stable air inlet pressure.

[0100] Referring to Figure 3 , the air inlet end of the second air duct 3 is provided with a second filter 9, which can filter out impurities carried in the ambient air, prevent larger impurities from entering the second air duct 3 and causing blockage, and prevent the second heat exchange channel 42 of the heat exchange device 4 from being blocked, so as to ensure the heat exchange efficiency of the heat exchange device 4.

[0101] Optionally, the second filter 9 can be a grid structure arranged at the air inlet end of the second air duct 3. Alternatively, the second filter 9 can also be a mesh structure, etc., as long as it can meet the filtering requirements.

[0102] As Figure 2As shown, the equipment cabinet 20 is provided with a fourth installation opening 203, and the second filter 9 on the second air duct 3 can be exposed through the fourth installation opening 203, so that the air inlet end of the second air duct 3 is in communication with the external environment. In addition, the fourth installation opening 203 can also be used for maintenance and repair of the second fan 8, which is convenient for later maintenance.

[0103] In some embodiments, only the first fan 7 or only the second fan 8 can be arranged in the second air duct 3. The number of fans arranged can be increased or decreased according to actual needs, and is not limited to the number and distribution mode listed above.

[0104] Referring to Figure 2 , the first air duct 2 includes a first air outlet section 21 and a second air outlet section 22. One end of the first air outlet section 21 is in communication with the air outlet 13, and the other end is in communication with the air inlet end of the first heat exchange channel 41. One end of the second air outlet section 22 is connected to the air outlet end of the first heat exchange channel 41, and the other end is in communication with the external environment. The second air duct 3 includes a first air inlet section 31 and a second air inlet section 32. One end of the first air inlet section 31 is in communication with the external environment, and the other end is in communication with the air inlet end of the second heat exchange channel 42. One end of the second air inlet section 32 is in communication with the air outlet end of the second heat exchange channel 42, and the other end is in communication with the air inlet 12.

[0105] That is, the first heat exchange channel 41 is connected to the middle region of the first air duct 2, and the second heat exchange channel 42 is connected to the middle region of the second air duct 3, so that the intersection position of the second air duct 3 and the first air duct 2 is in the middle region, which can realize large-area heat exchange in a small space, avoid long air ducts, and reasonably utilize the internal space of the clothes drying device.

[0106] In this embodiment, the air inlet 12 is located at the front end of the drying drum 1, and the heat exchange device 4 is located below the drying drum 1. The first air outlet section 21 includes a vertical portion and a horizontal portion connected in series. The vertical portion extends to the front side of the drying drum 1 to be connected to the air outlet 13 of the drying drum 1, and the horizontal portion extends to the lower side of the drying drum 1 to be connected to the heat exchange device 4.

[0107] Optionally, the cross-sectional area of the second air outlet section 22 gradually decreases along the airflow direction, which can accelerate the outward discharge of the hot and humid air and reduce the risk of backflow of the hot and humid air. At the same time, the design of the tapered opening can maintain the airflow velocity and reduce the probability of condensation of the hot and humid air.

[0108] Referring to Figure 3 and Figure 5 , in this embodiment, the first air inlet section 31 extends away from the one end of the second heat exchange channel 42 towards the front side of the clothes drying device, so that the air inlet 12 of the second air duct 3 faces the front side of the clothes drying device, and the external space is larger, which is more smooth when inhaling the normal-temperature air from the external environment.

[0109] Optionally, referring toFigure 4 、 Figure 5 and Figure 10 The second air inlet section 32 comprises a detachable flat section 321 and a curved section 322. The flat section 321 extends to one side of the drying drum 1 away from one end of the second heat exchange channel 42. The curved section 322 extends upwards first and then extends to the rear side of the drying drum 1 (see the orientation in Figure 10 and Figure 11 ). The curved section 322 is connected to the cover 102 of the heating device 10, so that the second air duct 3 communicates with the air inlet 12 of the drying drum 1 through the heating cavity 103.

[0110] Referring to Figure 10 and Figure 11 , the first air blower 7 is installed between the flat section 321 and the curved section 322, which facilitates the maintenance of the first air blower 7.

[0111] Embodiment Two

[0112] As shown in Figure 12 , the embodiment provides a clothes drying device control method applied to the clothes drying device as described above. The clothes drying device control method comprises the following steps:

[0113] S1, obtaining a clothes drying program;

[0114] S2, controlling the clothes drying device to operate according to the clothes drying program;

[0115] S3, detecting the degree of blockage at the heat exchange device 4;

[0116] S4, when the degree of blockage at the heat exchange device 4 exceeds a set threshold, controlling the clothes drying device to stop.

[0117] The clothes drying device control method provided by the embodiment can prevent the clothes drying device from catching fire due to poor air circulation and delayed heat release, improve the use safety of the clothes drying device, avoid low-efficiency operation of the clothes drying device, reduce the energy consumption of the clothes drying device, and prolong the service life of the clothes drying device.

[0118] Optionally, when the degree of blockage at the heat exchange device 4 exceeds the set threshold, the clothes drying device can also be controlled to send a prompt message to remind the user to remove the blockage (lint, fluff, etc.) at the heat exchange device 4 in time.

[0119] Exemplarily, the form of the prompting information can include one or more of a sound prompt, a visual prompt, a light prompt, a voice assistant prompt, etc. For example, a user is prompted by a beep sound through a buzzer; or, a user is prompted by using pre-recorded voice information; or, a user is prompted by an LED lamp of different colors and flashing modes, displaying graphical or textual information on a display panel, etc., as long as the prompting effect can be achieved.

[0120] In this embodiment, referring to Figure 6 , Figure 7 and Figure 8 , the clothes drying device further comprises an auxiliary air duct 5, the air inlet end of the auxiliary air duct 5 is in communication with the first air duct 2 and is located upstream of the first heat exchange channel 41, and the air inlet end of the auxiliary air duct 5 is provided with a movable baffle 51 capable of blocking or opening the auxiliary air duct 5. In the case that the airflow of the first heat exchange channel 41 of the heat exchange device 4 is unobstructed, the baffle 51 is in a closed state, and the auxiliary air duct 5 is not conducted, so that all the hot and humid air in the first air duct 2 can flow through the first heat exchange channel 41, ensuring the heat recovery effect. When the first air duct 2 is blocked at the heat exchange device 4 due to lint and the like, the baffle 51 is opened to make the auxiliary air duct 5 conductive, and part of the airflow in the first air duct 2 can flow through the auxiliary air duct 5, preventing the first air duct 2 from accumulating heat at the heat exchange device 4 due to blockage to generate high temperature, thereby avoiding the occurrence of fire hazards and improving the use safety of the clothes drying device.

[0121] In this embodiment, when the first air duct 2 is severely blocked at the heat exchange device 4, the wind pressure at the upstream of the first heat exchange channel 41 will increase, and under the action of the wind pressure, the baffle 51 is pushed upward to open the auxiliary air duct 5. One end of the baffle 51 can be rotatably connected to the inner wall of the auxiliary air duct 5 through a rotating shaft, and when the wind pressure is large, the free end of the baffle 51 rotates upward to open the auxiliary air duct 5.

[0122] In other embodiments, a driving member can be drivingly connected with the baffle 51 to drive the baffle 51 to rotate to open or block the auxiliary air duct 5. Alternatively, the baffle 51 can be designed in a translation manner, and a driving member is used to drive the baffle 51 to translate to block or open the auxiliary air duct 5.

[0123] As shown in Figure 13 , in step S3, the step of “detecting the blocking degree at the heat exchange device 4” includes:

[0124] S31, detecting the opening degree of the baffle 51;

[0125] S32, determining the blocking degree of the heat exchange device 4 according to the opening degree of the baffle 51.

[0126] The larger the opening of the baffle 51, the greater the wind pressure there is, that is, the more serious the blockage of the first heat exchange channel 41 of the heat exchange device 4. Therefore, the blockage degree of the heat exchange device 4 can be determined by detecting the opening of the baffle 51.

[0127] Optionally, a pressure sensor can be installed on the side of the baffle 51 that can be opened. The pressure sensor detects the wind pressure at the location of the baffle 51. The larger the pressure sensor detection value, the greater the wind pressure on the baffle 51 and the wider the opening of the baffle 51. When the pressure value detected by the pressure sensor exceeds a set pressure threshold, it is determined that the blockage degree of the heat exchange device 4 has exceeded the set threshold, and the clothes drying device is controlled to shut down.

[0128] Among them, the set pressure threshold can be measured based on experiments. The wind pressure value downstream of the heat exchange device 4 is measured when there are lint on the heat exchange device 4 but it does not have much impact on the drying efficiency. The set wind pressure threshold is greater than or equal to the above-mentioned measured value.

[0129] In other embodiments, a displacement sensor may be provided on the back side of baffle 51 to detect the distance between baffle 51 and the inner wall of auxiliary air duct 5. The smaller the distance between baffle 51 and the inner wall of auxiliary air duct 5, the greater the opening of baffle 51, indicating that the wind pressure acting on baffle 51 is greater. When the displacement value detected by the displacement sensor is less than a set displacement threshold, it is determined that the blockage degree of heat exchange device 4 has exceeded the set threshold, and the clothes drying apparatus is controlled to shut down.

[0130] Example 3

[0131] This embodiment provides a method for controlling a clothes drying device, which differs from the second embodiment in that:

[0132] like Figure 14 As shown, in step S3, the step of "detecting the blockage degree at the heat exchange device 4" includes:

[0133] S33, detecting the air volume information of the first air duct 2 downstream of the first heat exchange channel 41;

[0134] S34. Determine the blockage degree of the heat exchange device 4 according to the air volume information.

[0135] When the first heat exchange channel 41 is clogged, the air volume downstream of the first heat exchange channel 41 decreases. That is, the smaller the air volume downstream of the first heat exchange channel 41, the more severe the blockage of the heat exchange device 4. Therefore, by detecting the air volume information downstream of the first heat exchange channel 41, the degree of blockage of the heat exchange device 4 can be determined.

[0136] Optionally, the air volume information can include air pressure and / or air speed, and the degree of clogging of the heat exchange device 4 can be determined by detecting the air pressure value or air speed value downstream of the first heat exchange channel 41. Specifically, when the air pressure value is detected, if the air pressure is less than a set air pressure threshold, it is determined that the degree of clogging of the heat exchange device 4 exceeds the set threshold, and the drying apparatus is controlled to stop. The air pressure value can be detected by an air pressure sensor, and the set air pressure threshold can be determined according to experiments. In the case that there are lint on the heat exchange device 4 but the drying efficiency is not greatly affected, the air pressure value downstream of the heat exchange device 4 is measured, and the set air pressure threshold is greater than or equal to the measured value.

[0137] When the air speed value is detected, if the air speed is less than a set air speed threshold, it is determined that the degree of clogging of the heat exchange device 4 exceeds the set threshold, and the drying apparatus is controlled to stop. The air speed value can be detected by an air speed sensor, and the set air speed threshold can be determined according to experiments. In the case that there are lint on the heat exchange device 4 but the drying efficiency is not greatly affected, the air speed value downstream of the heat exchange device 4 is measured, and the set air speed threshold is greater than or equal to the measured value.

[0138] In some embodiments, the air volume information (air pressure and / or air speed) upstream and downstream of the first heat exchange channel 41 can also be detected respectively, and the air pressure difference and / or air speed difference between the upstream and downstream of the first heat exchange channel 41 can be calculated. When the obtained air pressure difference and / or air speed difference exceeds a set range, it is determined that the degree of clogging of the heat exchange device 4 exceeds the set threshold, and the drying apparatus needs to be controlled to stop.

[0139] Note that the above are only preferred embodiments of the present application and the principles of technology applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. Clothes drying equipment, characterized in that, include: A clothes processing chamber (11) having an air inlet (12) and an air outlet (13); a first air duct (2), wherein an air inlet end of the first air duct (2) is connected to the air outlet (13), and an air outlet end of the first air duct (2) is connected to the external environment; a second air duct (3), wherein an air inlet end of the second air duct (3) is connected to the external environment, and an air outlet end of the second air duct (3) is connected to the air inlet (12); The heat exchange device (4) is provided with a first heat exchange channel (41) and a second heat exchange channel (42) which are not connected to each other but intersect with each other, wherein the first heat exchange channel (41) is connected to the first air duct (2) and is located between the air inlet end and the air outlet end of the first air duct (2), and the second heat exchange channel (42) is connected to the second air duct (3) and is located between the air inlet end and the air outlet end of the second air duct (3), and the air flow in the first heat exchange channel (41) can perform heat exchange with the air flow in the second heat exchange channel (42).

2. The clothes drying device according to claim 1, characterized in that The clothes drying device further comprises an auxiliary air duct (5), wherein the auxiliary air duct (5) has a first end and a second end, wherein the first end is selectively connected to the first air duct (2) and is located upstream of the first heat exchange channel (41), and the second end is connected to the first air duct (2) and is located downstream of the first heat exchange channel (41).

3. The clothes drying device according to claim 2, characterized in that: A movable baffle (51) is provided at the connection point between the first end of the auxiliary air duct (5) and the first air duct (2), and the baffle (51) can block or open the auxiliary air duct (5).

4. The clothes drying device according to claim 1, characterized in that The heat exchange device (4) comprises a box structure, on which a plurality of first branch channels (411) extending along a first direction and a plurality of second branch channels (421) extending along a second direction are provided, wherein the plurality of second branch channels (421) and the plurality of first branch channels (411) are sequentially staggered in a third direction; The first heat exchange channel (41) includes a plurality of first branch channels (411), and the second heat exchange channel (42) includes a plurality of second branch channels (421); the first direction intersects the second direction, and the third direction is perpendicular to the first direction and the second direction.

5. The clothes drying device according to claim 1, characterized in that A first filter element (6) is provided on the first air duct (2), and the first filter element (6) is located between the heat exchange device (4) and the air outlet (13) of the laundry processing chamber (11); And / or, a first fan (7) is provided in the second air duct (3), and the first fan (7) is located between the heat exchange device (4) and the air inlet (12) of the laundry processing chamber (11); And / or, a second fan (8) is provided in the second air duct (3), and the second fan (8) is located between the heat exchange device (4) and the air inlet end of the second air duct (3); And / or, a second filter element (9) is provided at the air inlet end of the second air duct (3).

6. The clothes drying device according to claim 5, characterized in that When the first air duct (2) is provided with a first filter element (6), the clothes drying device further comprises an equipment box (20), the equipment box (20) is provided with a first mounting opening (201), the first air duct (2) is provided with a second mounting opening (211) at a position corresponding to the first mounting opening (201), and the first filter element (6) is detachably mounted on the first air duct (2) through the first mounting opening (201) and the second mounting opening (211).

7. The clothes drying device according to any one of claims 1 to 6, characterized in that: The clothes drying device further comprises a drying drum (1) and a heating device (10); the clothes processing chamber (11) is formed in the drying drum (1); the front end of the drying drum (1) is provided with the air outlet (13); and the rear end of the drying drum (1) is provided with the air inlet (12); The heating device (10) comprises a heating element (101) and a cover (102); the cover (102) is arranged at the rear end of the drying drum (1) and forms a heating chamber (103) between the cover and the drying drum (1); the heating element (101) is located in the heating chamber (103); and the heating chamber (103) is communicated with the second air duct (3) and the air inlet (12).

8. The clothes drying device according to any one of claims 1 to 6, characterized in that: The first air duct (2) comprises a first air outlet section (21) and a second air outlet section (22), one end of the first air outlet section (21) is connected to the air outlet (13), and the other end is connected to the air inlet end of the first heat exchange channel (41); one end of the second air outlet section (22) is connected to the air outlet end of the first heat exchange channel (41), and the other end is connected to the external environment; And / or, the second air duct (3) comprises a first air inlet section (31) and a second air inlet section (32), one end of the first air inlet section (31) is connected to the external environment, and the other end is connected to the air inlet end of the second heat exchange channel (42), one end of the second air inlet section (32) is connected to the air outlet end of the second heat exchange channel (42), and the other end is connected to the air inlet (12).

9. A clothes drying equipment control method, characterized in that: Applied to the clothes drying device according to any one of claims 1 to 8, the clothes drying device control method comprises the following steps: Get the drying program; Controlling the operation of the drying equipment according to the drying program; detecting the degree of blockage at the heat exchange device (4); When the degree of blockage at the heat exchange device (4) exceeds a set threshold, the clothes drying device is controlled to stop.

10. The clothes drying equipment control method according to claim 9, characterized in that: The step of "detecting the degree of blockage at the heat exchange device (4)" comprises: detecting air volume information of the first air duct (2) downstream of the first heat exchange channel (41); determining a blockage degree at the heat exchange device (4) based on the air volume information; or, The clothes drying device further comprises an auxiliary air duct (5), an air inlet end of the auxiliary air duct (5) being in communication with the first air duct (2) and being located upstream of the first heat exchange channel (41), and a movable baffle (51) being provided at the air inlet end of the auxiliary air duct (5), and the baffle (51) being capable of blocking or opening the auxiliary air duct (5); The step of "detecting the degree of blockage at the heat exchange device (4)" comprises: detecting the opening of the baffle (51); The degree of blockage of the heat exchange device (4) is determined according to the opening degree of the baffle (51).

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