A condensation mechanism for a laundry treatment device and a laundry treatment device

Abstract

The present invention provides a condensation mechanism for a laundry treatment device and a laundry treatment device. The condensation mechanism is disposed in the air duct of the laundry treatment device and includes an internal heat exchanger and a spraying assembly. A cooling fluid flow path is formed inside the internal heat exchanger, which includes a plurality of sequentially connected flow path units. Each flow path unit is provided with a main flow path and a branch flow path. At the reflux port of the main flow path, the fluid in the branch flow path acts on the fluid in the main flow path to reduce the flow velocity of the fluid in the main flow path. The main flow paths of the plurality of flow path units form a wavy shape, and the branch flow paths are alternately arranged on the left and right sides of the main flow path, so that the fluid in the branch flow path can form an obstructive effect on the fluid in the main flow path from different directions. When the cooling fluid flows through the cooling fluid flow path, heat exchange is completed with the humid and hot air in the air duct, extending the heat exchange time. A flat surface and an arc transition surface are formed on the outer wall surface of the internal heat exchanger, increasing the heat exchange area with the humid and hot air. The spraying assembly can clean the lint on the outer wall of the heat exchanger, reduce the wind resistance, and improve the condensation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of laundry equipment, and particularly to a condensation mechanism for a laundry treatment device and a laundry treatment device. Background Art

[0002] With the rapid economic development, people's demand for "washing and wearing immediately" is increasing day by day. A large number of washer-dryers, heat pump washer-dryers, and dryers have emerged. At present, there are problems such as low condensation efficiency and long drying time in the drying technology, resulting in clothing wrinkles and damage. Therefore, it is necessary to invent a device that can improve the condensation effect, increase the heat exchange surface area between the humid and hot air and the cooling device, enhance the condensation effect of water vapor in the humid and hot air, and reduce the drying time.

[0003] Chinese Patent CN107815812A discloses an efficient condenser, which increases multiple rows of cylindrical spring-shaped heat exchange tubes in the washing machine air duct to improve the condensation effect; however, when using a single row or multiple rows, a huge wind resistance will be formed, which is likely to cause overload damage to the fan, and lint hanging on the wall will make the heat exchange tube ineffective, thus prolonging the drying time. Summary of the Invention

[0004] In view of this, the present invention provides a condensation mechanism for a laundry treatment device and a laundry treatment device to solve the problems of complex structure and poor condensation effect of the existing condensation device.

[0005] A condensation mechanism for a laundry treatment device of the present invention, the laundry treatment device has a laundry treatment tub, the laundry treatment tub is provided with an air outlet, the air outlet is connected with an air duct, and the condensation mechanism is arranged in the air duct for cooling and dehumidifying the humid and hot air flowing into the air duct from the air outlet; the condensation mechanism includes:

[0006] An internal heat exchange member, an internal cooling fluid flow path is formed inside the internal heat exchange member, and the cooling fluid flow path is provided with a cooling fluid inlet and a cooling fluid outlet to introduce and discharge the cooling fluid; the humid and hot air exchanges heat with the cooling fluid through the internal heat exchange member in the air duct.

[0007] The cooling fluid flow path includes a plurality of sequentially connected flow path units, and each flow path unit is provided with a main flow path and a branch flow path; the main flow paths of the plurality of flow path units form a continuous flow path of the cooling fluid.

[0008] The main flow path is provided with a bifurcation port and a return port along the cooling fluid flow direction, the branch flow path bifurcates from the main flow path at the bifurcation port, converges into the main flow path at the return port, and then bifurcates from the main flow path at the bifurcation port of the main flow path of the next flow path unit, and so on, continuously circulating.

[0009] When the shunt flow path branches out from the main flow path, it forms an angle β with the main flow path, where 90° < β < 180°; when the shunt flow path converges into the main flow path from the return port, it forms an angle α with the main flow path, where 0° < α < 90°.

[0010] Further optionally, in the same flow path unit, the shunt flow path includes a straight segment and an arc segment; the upper end of the straight segment is connected to the main flow path through the bifurcation port, the lower end of the straight segment is connected to the upper end of the arc segment, and the lower end of the arc segment is connected to the main flow path through the return port.

[0011] Further optionally, the angle between the lower end of the arc segment and the main flow path is α, where 60° < α < 90°.

[0012] Further optionally, along the flow direction of the cooling fluid, the main flow paths of multiple flow path units form a wavy shape, and the left and right sides of the shunt flow paths of multiple flow path units are alternately arranged on the main flow paths of multiple flow path units.

[0013] Further optionally, in two adjacent flow path units, the main flow path on the upper side and the straight segment of the shunt flow path on the lower side are coaxial.

[0014] Further optionally, in the same flow path unit, the axes of the main flow path and the shunt flow path are located in the same plane.

[0015] Further optionally, multiple planes and arc transition surfaces are formed on the left side and / or the right side of the outer wall of the built-in heat exchanger, and flow holes are formed in the outer wall of the built-in heat exchanger for the main flow path and the shunt flow path of the same flow path unit.

[0016] Further optionally, the cooling fluid inlet is connected to an inlet fluid pipe, the cooling fluid outlet is connected to an outlet fluid pipe, the inlet fluid pipe is arranged on the upper side of the air duct and is communicated with an external inlet fluid pipeline; the outlet fluid pipe is arranged on the lower side of the air duct and is communicated with the laundry treatment tub;

[0017] When the cooling fluid enters the built-in heat exchanger from the cooling fluid inlet, the fluids in the main flow path and the shunt flow path interact at the return port, reducing the flow velocity of the fluid in the main flow path and prolonging the heat exchange time between the cooling fluid and the humid and hot air in the air duct.

[0018] Further optionally, the condensation mechanism has multiple built-in heat exchangers arranged in parallel, the upper ends of multiple built-in heat exchangers are communicated with multiple inlet fluid pipes through their respective cooling fluid inlets, and the lower ends of multiple built-in heat exchangers are respectively connected to an outlet fluid pipe through their respective cooling fluid outlets;

[0019] An over - flow space for humid - hot air is formed between multiple said built - in heat exchangers.

[0020] Further optionally, the condensation mechanism further has a spraying assembly, which is arranged in the air duct and includes a spraying water inlet pipe and a spray head; the spraying assembly can be controlled to spray water onto the built - in heat exchanger for cleaning the lint adsorbed on the outer wall of the built - in heat exchanger.

[0021] Further optionally, the condensation mechanism further has an external heat exchanger, which is arranged outside the air duct; the external heat exchanger has the same structure as the built - in heat exchanger. The difference is that one side wall of the external heat exchanger is integrally formed with one side wall of the air duct.

[0022] The present invention also provides a laundry treatment device, which has a laundry treatment tub and the condensation mechanism for the laundry treatment device according to any one of the above; the laundry treatment tub is provided with an air outlet, and the air outlet is connected to an air duct, and the condensation mechanism is arranged in the air duct.

[0023] By arranging a built - in heat exchanger in the air duct of the laundry treatment tub, a cooling fluid flow path is formed inside it. At the bifurcation, the shunt path and the main path have different flow directions. At the return port, the shunt path reduces the flow velocity of the main path, prolonging the heat exchange time between the cooling fluid and the humid - hot air in the air duct. At the same time, multiple planes and arc - transition surfaces are formed on the outer wall of the built - in heat exchanger, and an over - flow space for humid - hot air is left between multiple built - in heat exchangers, increasing the contact surface between the built - in heat exchanger and the humid - hot air in the air duct, saving space and increasing the heat exchange area. A spraying assembly is used to clean the lint on the outer wall of the built - in heat exchanger, reducing the wind resistance, increasing the heat exchange area and the over - flow space, improving the condensation effect, and facilitating the miniaturization of the laundry treatment equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0025] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have technical essence. Any modification of the structure, change of the ratio relationship or adjustment of the size, without affecting the efficacy that the present invention can produce and the purpose that can be achieved, should still fall within the scope that the technical content disclosed by the present invention can cover.

[0026] Figure 1a Schematic structural diagram of an embodiment of the flow path unit provided by the present invention;

[0027] Figure 1b 、 Figure 1c and Figure 1d are schematic structural diagrams of an embodiment of the condensation mechanism provided by the present invention;

[0028] Figure 2a and Figure 2b are schematic structural diagrams of an embodiment of the external heat exchanger provided by the present invention;

[0029] Figure 3 are schematic structural diagrams of an embodiment of the laundry treatment device provided by the present invention;

[0030] In the figure:

[0031] 1 - built-in heat exchanger; 11 - flow path unit; 12 - main flow path; 13 - branch flow path; 131 - straight section; 132 - arc section; 141 - bifurcation port; 142 - return port; 15 - flow-through hole;

[0032] 21 - fluid inlet pipe; 22 - fluid outlet pipe;

[0033] 31 - spray water inlet pipe; 32 - spray head;

[0034] 4 - external heat exchanger;

[0035] 51 - air duct; 52 - fan; 53 - electric heating device; 54 - front air duct. Detailed implementation manners

[0036] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "the" and "said" used in the embodiments of the present invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. "Plural" generally includes at least two, but does not exclude the case of including at least one.

[0038] It should be understood that the term "and / or" used herein is merely a description of the associated relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this text generally indicates that the associated objects before and after are in an "or" relationship.

[0039] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a commodity or system comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such commodity or system. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the commodity or system comprising said element.

[0040] In the existing drying technologies, due to low condensation efficiency and long drying time, clothes wrinkles and damages are caused. In order to ensure the drying effect, in some technologies, a condensation mechanism is arranged in the air duct of the washing machine to improve the condensation effect. However, due to its complex structure, a large air resistance is formed, causing the fan to be overloaded. The present invention provides a condensation mechanism arranged in the air duct, which includes an internal heat exchange member with a cooling fluid flow channel formed therein. The cooling fluid flow channel includes a plurality of sequentially connected flow path units. Each flow path unit is provided with a main flow path and a branch flow path. At the bifurcation of the main flow path, the branch flow path and the main flow path have different flow directions. At the return port of the main flow path, the fluid in the branch flow path reduces the flow velocity of the fluid in the main flow path, prolongs the heat exchange time between the cooling fluid and the humid and hot air in the air duct, improves the condensation effect, and the internal heat exchange member occupies a small space, with a small air resistance while increasing the heat exchange area.

[0041] <Internal heat exchange member>

[0042] As Figure 1a 、 Figure 1b 、 Figure 1c And Figure 1d As shown in, etc., this embodiment provides an internal heat exchange member 1 arranged in the air duct 51 of the laundry treatment device. A cooling fluid flow channel is formed inside the internal heat exchange member 1. The cooling fluid flow channel is provided with a cooling fluid inlet and a cooling fluid outlet, which are respectively used for the cooling fluid to enter the internal heat exchange member 1 and the cooling fluid to be discharged from the internal heat exchange member 1. The cooling fluid flows through the cooling fluid flow channel, and the humid and hot air in the air duct 51 contacts the outer wall of the internal heat exchange member 1. Then, the cooling fluid and the humid and hot air complete heat exchange through the wall surface of the internal heat exchange member 1, so that the water vapor in the humid and hot air is cooled and moves downward under the action of gravity to be separated from the air, achieving the effect of dehumidification.

[0043] The cooling fluid flow path includes a plurality of flow path units 11 connected in sequence. Each flow path unit 11 is provided with a main flow path 12 and a branch flow path 13. The main flow paths 12 of the plurality of flow path units 11 form a continuous flow path for the cooling fluid. Along the flow direction of the cooling fluid, the main flow path 12 is provided with a bifurcation port 141 and a return port 142. At the bifurcation port 141, the branch flow path 13 bifurcates and flows out from the main flow path 12. At the return port 142, the branch flow path 13 converges into the main flow path 12, and then at the bifurcation port 141 of the main flow path 12 of the next flow path unit 11, the flow path continues to bifurcate and flow out from the main flow path 12, thus continuously circulating to form the cooling fluid flow path. When the cooling fluid flows through the cooling fluid flow path, at the bifurcation port 141, it is divided into the main flow path fluid and the branch flow path fluid, and the two have different flow directions. At the return port 142, the branch flow path fluid converges with the main flow path fluid again and acts on the main flow path fluid, reducing the flow velocity of the main flow path fluid. Furthermore, the heat exchange time between the cooling fluid and the humid and hot air in the air duct 51 is extended, improving the cooling effect of the water vapor in the humid and hot air. The external space occupied by the condensation mechanism is small, which is beneficial to the miniaturization of the clothing treatment device;

[0044] When the branch flow path 13 bifurcates and flows out from the main flow path 12 at the bifurcation port 141, it has a different flow direction from the main flow path 12 and forms an angle β, where 90° < β < 180°. When β approaches 90°, the splitting effect of the branch flow path fluid and the main flow path fluid is strong, and the weakening effect on the flow velocity of the main flow path fluid is better. When β approaches 180°, the splitting effect of the branch flow path fluid and the main flow path fluid is weak, and the weakening effect on the flow velocity of the main flow path fluid is worse. When the branch flow path 13 converges into the main flow path 12 at the return port 142, it forms an angle α with the main flow path 12, where 0° < α < 90°. When α approaches 0°, the acting effect of the branch flow path fluid on the main flow path fluid is obvious, and the deceleration of the flow velocity of the main flow path fluid is greater. When α approaches 90°, the acting effect of the branch flow path fluid on the main flow path fluid is weak, and the deceleration of the flow velocity of the main flow path fluid is smaller.

[0045] As Figure 1c shown, a plurality of flow path units 11 are connected through the main flow path 12. When the cooling fluid enters the built-in heat exchanger 1, it flows through each flow path unit 11 via the main flow path 12. Since the main flow path 12 and the branch flow path 13 have different flow directions at the bifurcation port 141, at the return port 142, the main flow path fluid and the branch flow path fluid interact with each other, reducing the flow velocity of the main flow path fluid and extending the heat exchange time between the cooling fluid in the built-in heat exchanger 1 and the humid and hot air in the air duct 51, improving the heat exchange effect.

[0046] Preferably, the shunt path 13 includes a straight segment 131 and an arc segment 132; the upper end of the straight segment 131 communicates with the main path 12 through a bifurcation port 141, the lower end of the straight segment 131 communicates with the upper end of the arc segment 132, and the lower end of the arc segment 132 communicates with the main path 12 through a return port 142; at the bifurcation port 141, the angle between the straight segment 131 of the shunt path 13 and the main path 12 is β, where 90° < β < 180°, so that the main path fluid and the shunt path fluid have different flow directions; at the return port 142, the angle between the lower end of the arc segment 132 and the main path 12 is α, where 0° < α < 90°, so that the shunt path fluid and the main path fluid have different flow directions and form an obstructive effect on the main path fluid, reducing the flow velocity of the main path fluid; thus, when the cooling fluid passes through multiple flow path units 11, the flow velocity of the main path fluid is significantly reduced, prolonging the heat exchange time between the cooling fluid in the built-in heat exchanger 1 and the humid and hot air in the air duct 51 and improving the condensation effect.

[0047] In some embodiments, the angle between the lower end of the arc segment 132 and the main path 12 is α, where 60° < α < 90°; when the angle between the lower end of the arc segment 132 and the main path 12 is closer to 90°, at the return port 142, the obstructive effect of the shunt path fluid on the main path fluid is smaller, the flow velocity of the cooling fluid in the built-in heat exchanger 1 is faster, and the heat exchange time is shorter; when the angle between the lower end of the arc segment 132 and the main path 12 is closer to 60°, at the return port 142, the obstructive effect of the shunt path fluid on the main path fluid is greater, the flow velocity of the fluid in the built-in heat exchanger 1 is slower, and the heat exchange time is longer; the angle between the lower end of the arc segment 132 and the main path 12 can be set according to actual needs.

[0048] As Figure 1b and Figure 1c As shown, along the flow direction of the cooling fluid, the main paths 12 of multiple flow path units 11 form a wavy shape, and the shunt paths 13 of multiple flow path units 11 are arranged on the main paths 12 of multiple flow path units 11 in an alternating manner on the left and right; the shunt paths 13 on the left and right have different flow directions, and both are shunted from the main path 12 through the straight segment 131, so that the shunt path fluid has a weakening effect on the flow velocity of the main path fluid in different directions, and both converge with the main path 12 through the arc segment 132. The shunt path fluid converges with the main path fluid from different directions and has an obstructive effect in different directions, further reducing the flow velocity of the main path fluid; in this embodiment, the built-in heat exchanger 1 has 5 flow path units, but the number of flow path units 11 is not limited, and multiple flow path units 11 can be set according to actual needs.

[0049] Furthermore, the straight section 131 of the main flow path 12 on the upper side and the branch flow path 13 on the lower side in two adjacent flow path units 11 are coaxial, so that most of the main flow path fluid on the upper side can smoothly enter the branch flow path 13 on the lower side and a small part of the main flow path fluid enters the main flow path 12 at the bifurcation port 141; at the return port 142, the large-flow branch flow path fluid and the small-flow main flow path fluid converge, making the weakening effect of the branch flow path fluid on the flow velocity of the main flow path fluid greater; the axes of the main flow path 12 and the branch flow path 13 in the same flow path unit 11 are in the same plane, reducing the occupied space and simplifying the structure, enabling the built-in heat exchanger 1 to be integrally formed, ensuring the heat exchange time and reducing the processing cost at the same time.

[0050] In some preferred embodiments, a plurality of flat surfaces and arc transition surfaces are formed on the left side and / or the right side of the outer wall of the built-in heat exchanger 1, which increases the contact surface between the built-in heat exchanger 1 and the humid and hot air in the air duct 51. Furthermore, the heat exchange area between the cooling fluid in the built-in heat exchanger 1 and the humid and hot air in the air duct 51 is increased, and the heat exchange efficiency is improved; flow holes 15 are formed on the front side and the rear side of the outer wall of the built-in heat exchanger 1, and the humid and hot air in the air duct 51 can flow through the flow holes 15, further increasing the heat exchange area between the cooling fluid in the built-in heat exchanger 1 and the humid and hot air in the air duct 51; at the same time, the water vapor in the humid and hot air drips on the outer wall of the built-in heat exchanger 1 after cooling, and the outer wall of the built-in heat exchanger 1 has a drainage and convergence function, enabling the cooling fluid to quickly reach the lower side of the air duct 51 and be discharged to the outside through the laundry treatment tub. This part of the fluid can enter the built-in heat exchanger 1 as the cooling fluid and exchange heat with the humid and hot air in the air duct 51, saving fluid resources; the cooling fluid flow path of the built-in heat exchanger 1 is unidirectionally conductive, so that the cooling fluid flows from top to bottom, and the humid and hot air in the air duct 51 flows from bottom to top to complete the heat exchange. The water vapor in the humid and hot air cools and flows downward under the action of gravity, preventing the humid and hot air from flowing back into the laundry treatment tub reversely, which is beneficial to the health requirements of the laundry treatment device.

[0051] In order to enable the external fluid to smoothly enter and exit the built-in heat exchanger 1, in this embodiment, the cooling fluid inlet of the built-in heat exchanger 1 is connected to the inlet fluid pipe 21, and the cooling fluid outlet of the built-in heat exchanger 1 is connected to the outlet fluid pipe 22; the inlet fluid pipe 21 is arranged on the upper side of the air duct 51 and is communicated with the external inlet fluid pipeline, and the external fluid enters the built-in heat exchanger 1 through the external inlet fluid pipeline, the inlet fluid pipe 21 and the cooling fluid inlet; the outlet fluid pipe 22 is arranged on the lower side of the air duct 51 and is communicated with the laundry treatment tub, and the cooling fluid enters the laundry treatment tub through the cooling fluid outlet and the outlet fluid pipe; specifically, the upper side of the air duct 51 has a first mounting hole for the inlet fluid pipe 21, the inlet fluid pipe 21 passes through the first mounting hole and is communicated with the external inlet fluid pipeline, and is fixed on the upper side of the air duct 51, and the first mounting hole is sealed by a sealing ring; a buckle is provided between the outlet fluid pipe 22 and the lower side of the air duct 51, and the outlet fluid pipe 22 is fixed on the lower side of the air duct 51 through the buckle; the cooling fluid enters the built-in heat exchanger 1 from the inlet fluid pipe 21, and then enters the main flow path 12 and the branch flow path 13, and flows out of the built-in heat exchanger 1 from the outlet fluid pipe 22; specifically, the inlet fluid pipe 21 is arranged on the side back of the air duct 51.

[0052] It should be noted that the number of the built-in heat exchangers 1 of the condensation mechanism is not limited, and multiple built-in heat exchangers 1 can be set according to actual needs; multiple built-in heat exchangers 1 are arranged in parallel to form the condensation mechanism, the upper ends of the multiple built-in heat exchangers 1 are communicated with the multiple inlet fluid pipes 21 through their respective cooling fluid inlets, and the lower ends of the multiple built-in heat exchangers 1 are respectively connected to an outlet fluid pipe 22 through their respective cooling fluid outlets; in this embodiment, the condensation mechanism has two built-in heat exchangers 1.

[0053] When multiple built-in heat exchangers 1 are arranged in parallel to form the condensation mechanism, an over-flow space is formed between the multiple built-in heat exchangers 1, and the air in the air duct 51 can pass through the over-flow space, further increasing the contact area between the outer wall of the built-in heat exchanger 1 and the humid and hot air in the air duct 51, and improving the heat exchange efficiency between the cooling fluid in the built-in heat exchanger 1 and the humid and hot air in the air duct 51.

[0054] In order to enable the built-in heat exchanger 1 to have good heat conduction efficiency, the material is preferably a copper pipe, an aluminum pipe, etc., but is not limited to the above two.

[0055] When the humid and hot air enters the air duct 51 and comes into contact with the built-in heat exchanger 1, the lint therein will adhere to the outer surface of the built-in heat exchanger 1. If the lint is not cleaned in time, on the one hand, the air resistance in the air duct 51 will increase, and on the other hand, the contact area between the humid and hot air and the built-in heat exchanger 1 will be reduced, resulting in a decrease in the cooling effect. This embodiment provides a spraying assembly, which includes a spray inlet pipe 31 and a spray head 32 for cleaning the lint on the outer wall of the built-in heat exchanger 1. One end of the spray inlet pipe 31 is connected to an external water pipe, and the other end is connected to the spray head 32. Preferably, the upper side of the air duct 51 has a second mounting hole. One end of the spray inlet pipe 31 passes through the second mounting hole and is connected to the external water pipe, and is fixed on the upper side of the air duct 51. The second mounting hole is sealed by a sealing ring. The external water passes through the external water pipe and the spray inlet pipe 31 and reaches the spray head 32. Subsequently, the water is sprayed onto the outer wall surface of the built-in heat exchanger 1, and the lint falls from the outer wall surface of the built-in heat exchanger 1 under the washing action of the water and is discharged through the drain outlet of the laundry treatment barrel along with the cooling fluid.

[0056] <External heat exchanger>

[0057] In the present invention, the one corresponding to the built-in heat exchanger 1 is the external heat exchanger 4, and its internal structure is the same as that of the built-in heat exchanger 1. The difference is that one side wall surface of the external heat exchanger 4 and the corresponding side wall surface of the air duct 51 are integrated. The cooling fluid enters the inside of the external heat exchanger 4 and completes heat exchange with the humid and hot air in the air duct 51, or the cooling fluid and the humid and hot air complete heat exchange through the integrated side wall of the air duct 51 and the external heat exchanger 4. As Figure 2a and Figure 2b shown, this embodiment provides an external heat exchanger 4 which is arranged outside the air duct 51. The structure of the external heat exchanger 4 is the same as that of the above-mentioned built-in heat exchanger 1. One side wall of the external heat exchanger 4 is integrally formed with one outer side wall of the air duct 51, and the materials are the same.

[0058] An inlet fluid pipe 21 is provided on the upper side of the external heat exchanger 4. The inlet fluid pipe 21 is a semi-grooved fluid pipe. The cooling fluid enters the external heat exchanger 4 through the inlet fluid pipe 21 of the external heat exchanger 4 along the external inlet fluid pipeline and comes into contact with the humid and hot air in the air duct 51 for heat exchange. The water vapor in the humid and hot air is cooled into water droplets and flows downward along the outer wall of the external heat exchanger 4, and then is carried away by the fluid flowing out of the outlet fluid pipe 22 of the external heat exchanger 4, enters the laundry treatment barrel, and is discharged through the drain outlet.

[0059] It should be noted that the cooling fluid in the above-mentioned built-in heat exchanger 1 and external heat exchanger 4 can be cooling water or air. The cooling water enters the built-in heat exchanger 1 or the external heat exchanger 4 to complete heat exchange with the humid and hot air in the air duct 51, or the air enters the built-in heat exchanger 1 or the external heat exchanger 4 to complete heat exchange with the humid and hot air in the air duct 51.

[0060] <Washing machine>

[0061] When the above-mentioned condensation mechanism is arranged in the air duct of the laundry treatment device, it occupies a small space, the heat exchange time between the humid and hot air and the cooling fluid is long, and the condensation effect is improved; the contact area between the humid and hot air and the outer wall surface of the built-in heat exchanger 1 or the external heat exchanger 4 is large, and the air resistance is small, which is beneficial to the miniaturization of the laundry treatment device. As Figure 3 shown, this embodiment provides a washing machine, which has an inner drum, a blower 52 and the condensation mechanism described in any one of the above; taking the built-in heat exchanger 1 as an example of the condensation mechanism, an air duct 51 is provided between the air outlet of the inner drum and the blower 52, and the condensation mechanism is arranged in the air duct 51; a front air duct 54 is provided between the air inlet of the inner drum and the blower 52, and an electric heating device 53 is arranged in the front air duct 54; the humid and hot air entering the air duct 51 contacts the outer wall surface of the built-in heat exchanger 1 and completes heat exchange with the fluid in the built-in heat exchanger 1, and the water vapor therein is cooled into water droplets and discharged from the drain outlet of the inner drum;

[0062] During the drying process, the blower 52 is powered on to drive the air to circulate into the front air duct 54, and it becomes high-temperature air under the heating action of the electric heating device 53, and then enters the inner drum through the air inlet of the inner drum. The moisture of the clothes in the inner drum is evaporated into water vapor by the high temperature, and then enters the air duct 51 through the air outlet of the inner drum. The humid and hot air contacts the outer wall surface of the built-in heat exchanger 1 and completes heat exchange with the fluid in the built-in heat exchanger 1. The water vapor in the humid and hot air is cooled into water droplets and converges with the fluid flowing out of the fluid pipe 22 of the built-in heat exchanger 1, and is discharged out of the washing machine through the drain outlet of the inner drum. The above operations are cycled to achieve the drying effect.

[0063] In order to realize the automatic control of the drying process of the washing machine, in some preferred embodiments, the washing machine further includes a controller and a detection device. The detection device includes a first temperature sensor and a second temperature sensor, which are respectively arranged in the air duct 51 and the front air duct 54; the controller is electrically connected to the first temperature sensor and the second temperature sensor respectively, and controls the opening and closing of the blower 52 and the electric heating device.

[0064] When the drying program of the washing machine is started, the first temperature sensor detects the temperature T11 in the air duct 51 and transmits it to the controller; the controller starts timing. When the timing time reaches the preset time, the first temperature sensor detects the temperature difference T12 in the air duct 51 within the preset time and transmits it to the controller; based on T11 and T12, the temperature difference T13 is obtained, and the controller judges whether T13 is within the range of the first preset temperature difference T10; when T11 is within the range of the first preset temperature difference T10, the controller controls the washing machine to end drying; when T11 is not within the range of the first preset temperature difference T10, the controller adjusts the drying time of the washing machine according to the temperature difference T13;

[0065] The second temperature sensor detects the temperature T21 in the front air duct 54 and transmits it to the controller; the controller determines whether T21 is within the second preset temperature difference range T20; when T21 is not within the second preset temperature difference range T20, the controller makes the temperature in the front air duct 54 constant by adjusting the rotational speed of the blower 52 or the on / off state of the electric heating device 53; when the temperature in the front air duct 54 cannot be regulated, it indicates a fault in the blower 52 or the electric heating device 53.

[0066] The exemplary embodiments of the present disclosure have been specifically illustrated and described above. It should be understood that the present disclosure is not limited to the detailed structures, arrangements or implementation methods described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A condensing mechanism for a laundry treating apparatus, the laundry treating apparatus having a laundry treating tub provided with an air discharge opening, and the air discharge opening being connected to an air duct. Characterized in that, the condensing mechanism is disposed in the air duct and is used for cooling and dehumidifying the humid and hot air flowing into the air duct from the air discharge opening; the condensing mechanism includes: a built-in heat exchanger, a cooling fluid flow passage being formed inside the built-in heat exchanger, and the cooling fluid flow passage being provided with a cooling fluid inlet and a cooling fluid outlet for introducing and discharging the cooling fluid; the humid and hot air exchanges heat with the cooling fluid through the partition wall of the built-in heat exchanger in the air duct. The cooling fluid flow passage includes a plurality of successively connected flow path units, each flow path unit being provided with a main flow path and a branch flow path; the main flow paths of the plurality of flow path units form a continuous flow passage for the cooling fluid; along the flowing direction of the cooling fluid, the main flow paths of the plurality of flow path units form a wavy shape, and the left and right sides of the branch flow paths of the plurality of flow path units are alternately disposed on the main flow paths of the plurality of flow path units. The main flow path is provided with a bifurcation port and a return port along the flowing direction of the cooling fluid, the branch flow path bifurcates from the main flow path through the bifurcation port, converges into the main flow path through the return port, and then bifurcates from the main flow path at the bifurcation port of the main flow path of the next flow path unit, and thus continuously circulates. When the branch flow path bifurcates from the main flow path, it forms an angle β with the main flow path, where 90° < β < 180°; when the branch flow path converges into the main flow path through the return port, it forms an angle α with the main flow path, where 0° < α < 90°.

2. The condensing mechanism for a laundry treating apparatus according to claim 1, Characterized in that, in the same flow path unit, the branch flow path includes a straight segment and an arc segment; the upper end of the straight segment is communicated with the main flow path through the bifurcation port, the lower end of the straight segment is communicated with the upper end of the arc segment, and the lower end of the arc segment is communicated with the main flow path through the return port.

3. The condensing mechanism for a laundry treating apparatus according to claim 2, Characterized in that, the angle between the lower end of the arc segment and the main flow path is α, where 60° < α < 90°.

4. The condensing mechanism for a laundry treating apparatus according to claim 2, Characterized in that, the main flow path on the upper side and the straight segment of the branch flow path on the lower side in two adjacent flow path units are coaxial.

5. The condensing mechanism for a laundry treating apparatus according to claim 1, Characterized in that, the axes of the main flow path and the branch flow path in the same flow path unit are located in the same plane.

6. The condensing mechanism for a laundry treating apparatus according to claim 1, Characterized in that, a plurality of flat surfaces and arc transition surfaces are formed on the left side and / or the right side of the outer wall of the built-in heat exchanger, and flow holes are formed at the outer wall of the built-in heat exchanger for the main flow path and the branch flow path in the same flow path unit.

7. The condensing mechanism for a laundry treating apparatus according to claim 1, Characterized in that, The cooling fluid inlet is connected to an inlet fluid pipe, and the cooling fluid outlet is connected to an outlet fluid pipe. The inlet fluid pipe is arranged on the upper side of the air duct and is communicated with an external inlet fluid pipeline; the outlet fluid pipe is arranged on the lower side of the air duct and is communicated with the laundry treatment tub.

8. The condensation mechanism for a laundry treatment device according to claim 7, wherein, the condensation mechanism has a plurality of the built-in heat exchangers arranged in parallel. The upper ends of the plurality of built-in heat exchangers are communicated with the plurality of inlet fluid pipes through their respective cooling fluid inlets, and the lower ends of the plurality of built-in heat exchangers are respectively connected to an outlet fluid pipe through their respective cooling fluid outlets.

9. The condensation mechanism for a laundry treatment device according to claim 1, wherein, the condensation mechanism further has a spraying assembly, which is arranged in the air duct and includes a spraying inlet water pipe and a spray head; the spraying assembly can be controlled to spray water onto the built-in heat exchanger.

10. The condensation mechanism for a laundry treatment device according to claim 1, wherein, the condensation mechanism further has an external heat exchanger, which is arranged outside the air duct; the external heat exchanger has the same structure as the built-in heat exchanger, except that one side wall of the external heat exchanger is integrally formed with one side wall of the air duct.

11. A laundry treatment device, wherein, it has a laundry treatment tub and the condensation mechanism for a laundry treatment device according to any one of claims 1-10; the laundry treatment tub is provided with an air outlet, and the air outlet is connected to an air duct, and the condensation mechanism is arranged in the air duct.

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