Laundry treatment apparatus

Abstract

A laundry treatment apparatus, comprising: a drum assembly (1), the drum assembly (1) comprising a first drum (11) and a second drum (12), wherein the first drum (11) is arranged above the second drum (12); and a drying assembly (2), which is configured to provide hot air for the drum assembly (1), the drying assembly (2) comprising a heat pump system, wherein the heat pump system is configured to heat air, and the heat pump system is arranged above the first drum (11). By means of arranging the heat pump system above the first drum (11) at the top, the heat pump system can be correspondingly configured with a relatively large volume, thereby fully heating and drying moist air, and thus improving the drying efficiency; the assembly, disassembly and maintenance of the heat pump system is also facilitated; moreover, the space behind the first drum (11) is freed up, thereby facilitating the arrangement of components related to the heat pump system, and providing more room for setting the depth of the first drum (11).

Description

Laundry treating apparatus

[0001] The present application claims priority to Chinese Patent Application No. 202411109812.X, filed on August 13, 2024, entitled “Laundry treating apparatus”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of laundry treating apparatuses, and specifically provides a laundry treating apparatus. BACKGROUND

[0003] With the progress of the times and the improvement of living standards, people have new demands for laundry washing. Many users will classify the laundry when washing, such as washing underwear and outerwear separately, washing baby and adult clothes separately, washing clothes with different degrees of dirtiness separately, and washing clothes with different colors separately. Using a single-cylinder washing machine has the problem of small amount of laundry per washing, which cannot fully utilize the capacity of the washing machine, thereby causing waste of water and energy consumption, which does not meet the requirements of environmental protection and energy saving. Therefore, double-cylinder and multi-cylinder washing machines are increasingly entering people's lives.

[0004] Double-cylinder and multi-cylinder washing machines with drying function usually install a heat pump system at the rear side of the top cylinder. Due to the limited space at the rear side of the top cylinder, the volume of the heat pump system is limited, which affects the heating and drying efficiency of the heat pump system. In addition, due to the complexity of the components related to the heat pump system in double-cylinder and multi-cylinder washing machines, the limited space at the rear side of the top cylinder makes it difficult to arrange the components related to the heat pump system.

[0005] Accordingly, there is a need in the art for a new laundry treating apparatus to solve the above problems. SUMMARY

[0006] The present application aims to solve the above technical problems, i.e., to solve the problem of difficulty in arranging the heat pump system of a double-cylinder and multi-cylinder washing machine in the prior art and affecting the drying efficiency.

[0007] The present application provides a laundry treating apparatus, comprising: a cylinder assembly, the cylinder assembly comprising a first cylinder and a second cylinder, the first cylinder being arranged above the second cylinder; a drying assembly, the drying assembly being configured to provide hot air to the cylinder assembly, the drying assembly comprising a heat pump system, the heat pump system being configured to heat air, the heat pump system being arranged above the first cylinder.

[0008] In the technical scheme, the heat pump system is arranged above the first cylinder at the top, so that the heat pump system can be arranged in a larger volume, thereby sufficiently heating and drying the wet air and improving the drying efficiency, and the space behind the first cylinder is released, facilitating the arrangement of components related to the heat pump system and providing more space for the depth of the first cylinder.

[0009] In the specific embodiment of the laundry treating apparatus, the drying assembly further comprises an air exchange pipeline, the heat pump system heats air in the air exchange pipeline, the air exchange pipeline is arranged above the first cylinder; an air supply pipeline for guiding the air in the air exchange pipeline to the cylinder assembly; and an air return pipeline for guiding air of the cylinder assembly to the air exchange pipeline, the air return pipeline is arranged behind the first cylinder.

[0010] In the technical scheme, the air in the air exchange pipeline is heated by the heat pump system, then enters the cylinder assembly through the air supply pipeline, and the wet air in the cylinder assembly is heated and dried by being returned to the air exchange pipeline through the air return pipeline, thereby achieving the drying of the laundry in the cylinder assembly, and the air return pipeline is arranged behind the first cylinder, thereby fully utilizing the space behind the first cylinder, avoiding the increase of the volume of the laundry treating apparatus, and facilitating the arrangement of the air return pipeline.

[0011] In the specific embodiment of the laundry treating apparatus, the cylinder assembly further comprises a third cylinder, the third cylinder is arranged below the second cylinder, the volume of the first cylinder is smaller than that of the second cylinder, and the volume of the second cylinder is equal to or smaller than that of the third cylinder.

[0012] In the technical scheme, the upper cylinder has a smaller volume and the lower cylinder has a larger volume, which helps to improve the stability of the laundry treating apparatus, and the first cylinder at the top has the smallest volume, so that the space behind the first cylinder can be larger, facilitating the arrangement of the pipelines, joints and other components related to the heat pump system above the first cylinder.

[0013] In the specific embodiment of the laundry treating apparatus, the cylinder assembly further comprises a fourth cylinder, the fourth cylinder and the first cylinder are arranged transversely, the second cylinder is arranged directly below the first cylinder and the fourth cylinder, and the volume of the fourth cylinder is equal to that of the first cylinder.

[0014] In the technical scheme, the cylinders with a smaller volume at the top can be arranged transversely in two or more, to meet different use requirements.

[0015] In the specific embodiment of the laundry treating apparatus, the return air pipeline comprises a first pipeline, a second pipeline and a third pipeline, the first pipeline is in communication with the air exchange pipeline, the second pipeline is in communication with the second drum, and the third pipeline is in communication with the third drum; the drying assembly further comprises a first return air switching structure, the first pipeline, the second pipeline and the third pipeline are connected with the first return air switching structure respectively, and the first return air switching structure is used for controlling the opening and closing of the first pipeline and the second pipeline and / or the third pipeline.

[0016] In the case of adopting the technical solution, the opening and closing of the first pipeline and the second pipeline and / or the third pipeline is controlled by the first return air switching structure, so that when the first pipeline is in communication with the second pipeline and the first pipeline is disconnected with the third pipeline, only the air in the second drum can return to the air exchange pipeline, thereby realizing drying treatment of only the second drum; when the first pipeline is in communication with the third pipeline and the first pipeline is disconnected with the second pipeline, only the air in the third drum can return to the air exchange pipeline, thereby realizing drying treatment of only the third drum; when the first pipeline is in communication with the second pipeline and the third pipeline, the air in the second drum and the third drum can both return to the air exchange pipeline, thereby realizing drying treatment of the second drum and the third drum.

[0017] In the specific embodiment of the laundry treating apparatus, the first return air switching structure is arranged behind the first drum.

[0018] In the case of adopting the technical solution, the first return air switching structure is arranged behind the first drum, the space behind the first drum is fully utilized, and the increase in the volume of the laundry treating apparatus is avoided, thereby facilitating the arrangement of the first return air switching structure.

[0019] In the specific embodiment of the laundry treating apparatus, the first return air switching structure comprises a spherical valve body, the spherical valve body is provided with a first valve port, a second valve port and a third valve port in communication with each other, and the spherical valve body is arranged to be rotatable to control the opening and closing of the first valve port, the second valve port and the third valve port and the first pipeline, the second pipeline and the third pipeline.

[0020] In the case of adopting the technical solution, the opening and closing of the first pipeline and the second pipeline and / or the third pipeline is controlled by controlling the opening and closing of the first valve port, the second valve port, the third valve port and the first pipeline, the second pipeline and the third pipeline.

[0021] In the specific embodiment of the clothes treatment device, the ball-shaped valve body is further provided with a blocking part, which is not communicated with the first valve port, the second valve port and the third valve port; when the ball-shaped valve body is rotated to the first valve port being communicated with the first pipeline, the second valve port is communicated with the second pipeline and the third valve port is communicated with the third pipeline; when the ball-shaped valve body is rotated to the third valve port being communicated with the first pipeline, the second valve port is communicated with the third pipeline and the blocking part is connected with the second pipeline; when the ball-shaped valve body is rotated to the second valve port being communicated with the first pipeline, the first valve port is communicated with the second pipeline and the blocking part is connected with the third pipeline.

[0022] In the specific embodiment of the clothes treatment device, the ball-shaped valve body is further provided with a blocking part, which is not communicated with the first valve port, the second valve port and the third valve port; when the ball-shaped valve body is rotated to the first valve port being communicated with the first pipeline, the second valve port is communicated with the second pipeline and the third valve port is communicated with the third pipeline; when the ball-shaped valve body is rotated to the third valve port being communicated with the first pipeline, the second valve port is communicated with the third pipeline and the blocking part is connected with the second pipeline; when the ball-shaped valve body is rotated to the second valve port being communicated with the first pipeline, the first valve port is communicated with the second pipeline and the blocking part is connected with the third pipeline.

[0023] In the specific embodiment of the clothes treatment device, the first valve port, the second valve port and the third valve port are arranged on a first cross section of the ball-shaped valve body, the first cross section is perpendicular to the rotation axis of the ball-shaped valve body, the first valve port and the second valve port are arranged at two ends of a first diameter of the first cross section, and the third valve port is arranged on a second diameter of the first cross section, the second diameter being perpendicular to the first diameter.

[0024] In the specific embodiment of the clothes treatment device, the first valve port, the second valve port and the third valve port are arranged on a first cross section of the ball-shaped valve body, the first cross section is perpendicular to the rotation axis of the ball-shaped valve body, the first valve port and the second valve port are arranged at two ends of a first diameter of the first cross section, and the third valve port is arranged on a second diameter of the first cross section, the second diameter being perpendicular to the first diameter.

[0025] In the specific embodiment of the clothes treatment device, the first return air switching structure further comprises a sealing box, the ball-shaped valve body is arranged in the sealing box, and the first pipeline, the second pipeline and the third pipeline are all communicated with the sealing box.

[0026] In the technical scheme, the sealing box is used to improve the sealing performance between the first pipeline, the second pipeline, the third pipeline and the first return air switching structure, and to avoid air leakage during rotation of the spherical valve.

[0027] Compared with the prior art, the laundry treating apparatus provided by the application has the beneficial effects that: in the technical scheme, the heat pump system is arranged above the first cylinder at the top, so that the heat pump system can be arranged in a larger volume, can sufficiently heat and dry the wet air, improves the drying efficiency, releases the space behind the first cylinder, facilitates arrangement of components related to the heat pump system, and provides more space for setting the depth value of the first cylinder, in addition, the heat pump system is arranged at the uppermost position, which facilitates disassembly and maintenance of the heat pump system. BRIEF DESCRIPTION OF DRAWINGS

[0028] The preferred embodiments of the application will be described below with reference to the accompanying drawings, in which:

[0029] Fig. 1 is a schematic view of the overall structure of the laundry treating apparatus according to the application;

[0030] Fig. 2 is a schematic view of the structure of the laundry treating apparatus according to the application from another angle;

[0031] Fig. 3 is a schematic view of the structure of the first return air switching structure according to the application;

[0032] Fig. 4 is a schematic view of one use state of the first return air switching structure according to the application;

[0033] Fig. 5 is a schematic view of another use state of the first return air switching structure according to the application.

[0034] Reference Signs:

[0035] 1 - cylinder assembly, 2 - drying assembly, 11 - first cylinder, 12 - second cylinder, 13 - third cylinder, 14 - fourth cylinder, 21 - air supply pipeline, 22 - air supply pipeline, 23 - return air pipeline, 24 - first return air switching structure, 231 - first pipeline, 232 - second pipeline, 233 - third pipeline, 241 - spherical valve body, 242 - sealing box, 2411 - first valve port, 2412 - second valve port, 2413 - third valve port, 2414 - blocking part. DETAILED DESCRIPTION

[0036] Some embodiments of the application will be described below with reference to the accompanying drawings. Those skilled in the art will understand that these embodiments are only used to explain the technical principles of the application, and are not used to limit the protection scope of the application. Those skilled in the art can make adjustments as needed to adapt to specific application occasions.

[0037] It should be noted that in the description of the present application, the terms "center", "upper", "lower", "left", "right", "front", "back", "top", "bottom", "vertical", "horizontal", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the related devices or elements 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 ordinal numbers "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0038] In addition, it should be noted that in the description of the present application, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] Based on the background art, the arrangement of the double-cylinder and multi-cylinder washing machine heat pump system in the prior art is difficult and affects the drying efficiency. The heat pump system is arranged above the first cylinder at the top, so that the heat pump system can be correspondingly arranged in a larger volume, which can fully heat and dry the wet air, improve the drying efficiency, and at the same time release the space behind the first cylinder, facilitate the arrangement of the parts related to the heat pump system and provide more space for the depth value of the first cylinder. In addition, the heat pump system is arranged at the top, which facilitates the disassembly and maintenance of the heat pump system.

[0040] First, refer to FIG. 1 and FIG. 2, FIG. 1 is a schematic diagram of the overall structure of the clothes processing equipment of the present application, and FIG. 2 is a schematic diagram of the structure of the clothes processing equipment of the present application from another angle. As shown in FIG. 1 and FIG. 2, the clothes processing equipment of the present application comprises a cylinder assembly 1 and a drying assembly 2, the cylinder assembly 1 comprises a first cylinder 11, a second cylinder 12, a third cylinder 13 and a fourth cylinder 14, the first cylinder 11 and the fourth cylinder 14 are arranged transversely, the second cylinder 12 is arranged directly below the middle of the first cylinder 11 and the fourth cylinder 14, and the third cylinder 13 is arranged below the second cylinder 12. The volume of each cylinder satisfies the condition that the first cylinder 11 = the fourth cylinder 14 < the second cylinder 12 ≤ the third cylinder 13; the drying assembly 2 is used to provide hot air for the cylinder assembly 1.

[0041] The drying assembly 2 comprises a heat pump system, an air exchange pipeline 21, an air supply pipeline 22, an air return pipeline 23, and a first air return switching structure 24. The heat pump system is used to heat the air in the air exchange pipeline 21. The heat pump system and the air exchange pipeline 21 are arranged above the first drum 11 and the fourth drum 14. The air supply pipeline 22 is in communication with the air exchange pipeline 21, the second drum 12, and the third drum 13, respectively, and is used to guide the air in the air exchange pipeline 21 into the second drum 12 and the third drum 13. The air return pipeline 23 comprises a first pipeline 231, a second pipeline 232, and a third pipeline 233. The first pipeline 231 is in communication with the air exchange pipeline 21. The second pipeline 232 is in communication with the second drum 12. The third pipeline 233 is in communication with the third drum 13. The air return pipeline 23 is arranged behind the first drum 11, fully utilizes the space behind the first drum 11, avoids increasing the size of the clothes treatment device, and facilitates the arrangement of the air return pipeline 23. After the air in the air exchange pipeline 21 is heated by the heat pump system, the air enters the second drum 12 and the third drum 13 through the air supply pipeline 22. The humid air in the second drum 12 and the third drum 13 returns to the air exchange pipeline 21 through the air return pipeline 23 for heating and drying, thereby realizing the drying of the clothes in the drum assembly 1. The first air return switching structure 24 is connected with the first pipeline 231, the second pipeline 232, and the third pipeline 233, respectively. The first air return switching structure 24 is used to control the on-off of the first pipeline 231 and the second pipeline 232 and / or the third pipeline 233. When the first pipeline 231 is in communication with the second pipeline 232 and the first pipeline 231 is disconnected with the third pipeline 233, only the air in the second drum 12 can return to the air exchange pipeline 21, thereby realizing the drying of only the second drum 12. When the first pipeline 231 is in communication with the third pipeline 233 and the first pipeline 231 is disconnected with the second pipeline 232, only the air in the third drum 13 can return to the air exchange pipeline 21, thereby realizing the drying of only the third drum 13. When the first pipeline 231 is in communication with the second pipeline 232 and the third pipeline 233, the air in the second drum 12 and the third drum 13 can both return to the air exchange pipeline 21, thereby realizing the drying of the second drum 12 and the third drum 13. The first air return switching structure 24 is arranged behind the first drum 11, fully utilizes the space behind the first drum 11, avoids increasing the size of the clothes treatment device, and facilitates the arrangement of the first air return switching structure 24.

[0042] By arranging the heat pump system above the first drum 11 at the top, the heat pump system can be correspondingly arranged in a larger size, thereby sufficiently heating and drying the humid air, improving the drying efficiency, and releasing the space behind the first drum 11, facilitating the arrangement of the components related to the heat pump system. In addition, the arrangement of the heat pump system at the top facilitates the disassembly and maintenance of the heat pump system.

[0043] It should be noted that the laundry treating apparatus can be a washing machine, a washer-dryer, a dryer, etc., which is not specifically limited here; in addition, the transverse direction refers to the left-right direction shown in FIGS. 1 and 2, i.e., the left-right direction of the laundry treating apparatus, and the front-rear direction refers to the front-rear direction shown in FIGS. 1 and 2, i.e., the front-rear direction of the laundry treating apparatus.

[0044] Specifically, the heat pump system includes a refrigerant pipeline, and a compressor, an evaporator, a throttle valve and a condenser sequentially arranged on the refrigerant pipeline, the filter screen, the evaporator, the condenser and the fan are sequentially arranged in the air exchange pipeline 21 from the return air outlet to the air supply outlet, the evaporator is used to condense water in the humid air, and the condenser is used to heat the air; since the evaporator and the condenser have better drying effect when they have larger volume, the heat pump system is arranged at the uppermost position, which can provide sufficient space for placing the evaporator and the condenser, and facilitates disassembly and maintenance of the heat pump system; in addition, when the filter screen needs to be cleaned, the filter screen can be conveniently taken out.

[0045] Those skilled in the art can understand that, although the above describes that the drum assembly 1 includes the first drum 11, the second drum 12, the third drum 13 and the fourth drum 14 in combination with FIGS. 1 and 2, this is not a limitation, the drum assembly 1 can also only include the first drum 11 and the second drum 12, and the first drum 11 is arranged above the second drum 12. As to the depth of the first drum 11, it can be smaller than the depth of the second drum 12 to provide more space for conveniently arranging related components, and the depth of the fourth drum 14 can be the same as or different from that of the first drum 11, which can be adjusted according to needs by those skilled in the art, without departing from the principles of the present application, and all of them are within the protection scope of the present application.

[0046] Possibly, the air supply pipeline 22 is arranged at the right side of the drum assembly 1 and communicates with the front portions of the second drum 12 and the third drum 13, and the return air pipeline 23 is arranged at the left rear of the first drum 11, the second pipeline 232 communicates with the rear portion of the second drum 12, and the third pipeline 233 communicates with the rear portion of the third drum 13, which improves the action time of the hot air in the second drum 12 and the third drum 13, improves the drying effect, and also facilitates the arrangement of the air supply pipeline 22 and the return air pipeline 23.

[0047] Referring to FIG. 3-5, FIG. 3 is a structural schematic diagram of the first return air switching structure of the present application, FIG. 4 is a schematic diagram of one use state of the first return air switching structure of the present application, and FIG. 5 is a schematic diagram of another use state of the first return air switching structure of the present application. As shown in FIG. 3-5, the first return air switching structure 24 comprises a spherical valve body 241 and a sealing box 242. The spherical valve body 241 is provided with a first valve port 2411, a second valve port 2412 and a third valve port 2413 which are in communication with each other. The spherical valve body 241 is arranged to be rotatable along a rotation axis. The first valve port 2411, the second valve port 2412 and the third valve port 2413 are arranged on a first cross section of the spherical valve body 241. The first cross section is perpendicular to the rotation axis of the spherical valve body 241. The first valve port 2411 and the second valve port 2412 are arranged at two ends of a first diameter of the first cross section. The third valve port 2413 is arranged on a second diameter of the first cross section. The second diameter is perpendicular to the first diameter. The spherical valve body 241 is further provided with a blocking part 2414. The blocking part 2414 is not in communication with the first valve port 2411, the second valve port 2412 and the third valve port 2413. The positions of the first valve port 2411, the second valve port 2412, the third valve port 2413 and the blocking part 2414 are arranged such that the spherical valve body 241 can switch to a different communication state every 90° rotation. The spherical valve body 241 is arranged in the sealing box 242. The first pipeline 231, the second pipeline 232 and the third pipeline 233 are all in communication with the sealing box 242. The sealing box 242 is used to improve the sealing between the first pipeline 231, the second pipeline 232, the third pipeline 233 and the first return air switching structure 24, and to avoid air leakage during rotation of the spherical valve.

[0048] As shown in FIG. 3, when the second cylinder 12 and the third cylinder 13 need to be dried, the spherical valve body 241 is controlled to rotate to a state in which the first valve port 2411 is in communication with the first pipeline 231, the second valve port 2412 is in communication with the second pipeline 232, and the third valve port 2413 is in communication with the third pipeline 233, so that the first pipeline 231 is in communication with the second pipeline 232 and the third pipeline 233. As shown in FIG. 5, when only the second cylinder 12 needs to be dried, the spherical valve body 241 is controlled to rotate to a state in which the second valve port 2412 is in communication with the first pipeline 231, the first valve port 2411 is in communication with the second pipeline 232, and the blocking part 2414 is connected with the third pipeline 233, so that the first pipeline 231 is in communication with the second pipeline 232 and disconnected with the third pipeline 233. As shown in FIG. 4, when only the third cylinder 13 needs to be dried, the spherical valve body 241 is controlled to rotate to a state in which the third valve port 2413 is in communication with the first pipeline 231, the second valve port 2412 is connected with the third pipeline 233, and the blocking part 2414 is connected with the second pipeline 232, so that the first pipeline 231 is in communication with the third pipeline 233 and disconnected with the second pipeline 232.

[0049] Possibly, a seal is arranged between the spherical valve body 241 and the sealing box 242, or the sealing box 242 is filled with sealing oil, for improving the sealing effect. The first return air switching structure 24 further comprises a motor, which is in transmission connection with the rotating shaft. The motor drives the spherical valve body 241 to rotate through the rotating shaft. The motor is installed on the outer wall of the sealing box 242.

[0050] Those skilled in the art can understand that, although the air supply pipeline 22 described above in combination with FIG. 1 and FIG. 2 is in communication with the second cylinder 12 and the third cylinder 13 respectively, the return air pipeline 23 comprises a second pipeline 232 and a third pipeline 233, the second pipeline 232 is in communication with the second cylinder 12, and the third pipeline 233 is in communication with the third cylinder 13, but this is not restrictive, the air supply pipeline 22 can also be in communication with the first cylinder 11 and the fourth cylinder 14 respectively, the return air pipeline 23 can also comprise a fourth pipeline and a fifth pipeline, the fourth pipeline is in communication with the first cylinder 11, and the fifth pipeline is in communication with the fourth cylinder 14, so as to realize drying of the first cylinder 11 and the fourth cylinder 14. Correspondingly, the second return air switching structure is arranged on the second pipeline 232, the fourth pipeline is in communication with the second return air switching structure, and the second return air switching structure is used for controlling the on-off of the second pipeline 232 and the on-off of the second pipeline 232 and the fourth pipeline. The third return air switching structure is arranged on the fourth pipeline, the fifth pipeline is in communication with the third return air switching structure, and the third return air switching structure is used for controlling the on-off of the fourth pipeline and the on-off of the fourth pipeline and the fifth pipeline, so as to realize control of whether each cylinder is dried. It should be noted that the second return air switching structure and the third return air switching structure can be similar structures to the first return air switching structure 24, or can be three-position three-way valves, four-position three-way valves and the like of other structures, and the first return air switching structure 24 can also be three-position three-way valves, four-position three-way valves and the like of other structures, as long as the control of the on-off of different pipelines can be realized. Those skilled in the art can make adjustments according to needs, without departing from the principles of the present application, and all fall within the protection scope of the present application.

[0051] It should be noted that the above embodiments are only used to illustrate the principles of the present application, and are not intended to limit the protection scope of the present application. Those skilled in the art can make adjustments to the above embodiments without departing from the principles of the present application, so that the present application can be applied to more specific application scenarios.

[0052] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without departing from the principles of the present application, and the technical solutions after the changes or replacements will all fall within the protection scope of the present application.

Claims

1.A laundry treating apparatus, characterized in that, the laundry treating apparatus comprises: a drum assembly comprising a first drum and a second drum, the first drum being disposed above the second drum; a drying assembly for providing hot air to the drum assembly, the drying assembly comprising a heat pump system for heating air, the heat pump system being disposed above the first drum. 2.A laundry treating apparatus according to claim 1, characterized in that, the drying assembly further comprises: an air exchange pipeline, the heat pump system heating air in the air exchange pipeline, the air exchange pipeline being disposed above the first drum; an air supply pipeline for guiding air in the air exchange pipeline to the drum assembly; an air return pipeline for guiding air of the drum assembly into the air exchange pipeline, the air return pipeline being disposed behind the first drum. 3.A laundry treating apparatus according to claim 2, characterized in that, the drum assembly further comprises a third drum, the third drum being disposed below the second drum, a volume of the first drum being less than a volume of the second drum, the volume of the second drum being less than or equal to a volume of the third drum. 4.A laundry treating apparatus according to claim 3, characterized in that, the drum assembly further comprises a fourth drum, the fourth drum and the first drum being disposed laterally, the second drum being disposed directly below a middle of the first drum and the fourth drum, a volume of the fourth drum being equal to a volume of the first drum. 5.A laundry treating apparatus according to claim 3, characterized in that, the air return pipeline comprises a first pipeline, a second pipeline and a third pipeline, the first pipeline being in communication with the air exchange pipeline, the second pipeline being in communication with the second drum, the third pipeline being in communication with the third drum; the drying assembly further comprises a first air return switching structure, the first pipeline, the second pipeline and the third pipeline being connected to the first air return switching structure respectively, the first air return switching structure being configured to control opening and closing of the first pipeline and the second pipeline and / or the third pipeline. 6.A laundry treating apparatus according to claim 5, characterized in that, the first air return switching structure is disposed behind the first drum. 7.A laundry treating apparatus according to claim 5, characterized in that, the first air return switching structure comprises a spherical valve body, the spherical valve body being provided with a first valve port, a second valve port and a third valve port in communication with each other, the spherical valve body being configured to rotate to control opening and closing of the first valve port, the second valve port and the third valve port and the first pipeline, the second pipeline and the third pipeline. 8.A laundry treating apparatus according to claim 7, characterized in that, the spherical valve body is further provided with a blocking portion, the blocking portion not being in communication with the first valve port, the second valve port and the third valve port; when the spherical valve body is rotated to a position in which the first valve port is in communication with the first pipeline, the second valve port is in communication with the second pipeline, and the third valve port is in communication with the third pipeline. When the spherical valve body rotates to the third valve port being communicated with the first pipeline, the second valve port is communicated with the third pipeline, and the blocking part is connected with the second pipeline; When the spherical valve body rotates to the second valve port being communicated with the first pipeline, the first valve port is communicated with the second pipeline, and the blocking part is connected with the third pipeline. 9.The laundry treating apparatus of claim 8, wherein The first valve port, the second valve port and the third valve port are arranged on a first cross section of the spherical valve body, the first cross section being perpendicular to an axis of rotation of the spherical valve body, the first valve port and the second valve port being arranged at two ends of a first diameter of the first cross section, and the third valve port being arranged on a second diameter of the first cross section, the second diameter being perpendicular to the first diameter. 10.The laundry treating apparatus of claim 7, wherein The first return air switching structure further comprises a sealing box, the spherical valve body being arranged in the sealing box, and the first pipeline, the second pipeline and the third pipeline all being communicated with the sealing box.

Images