A washing machine

Abstract

The present invention provides a washing machine, which belongs to the technical field of washing machines. It comprises a clothes processing barrel; a condensing air duct, which is connected to the rear of the clothes processing barrel; a condensing box, which has an air inlet and an exhaust port, wherein the air inlet is connected to the clothes processing barrel and the exhaust port is connected to the external environment of the condensing box. The condensing box also has a water inlet and a drain port, and the drain port is connected to the condensing air duct; wherein a pressure relief device is provided at the position of the air inlet, which can open or close the air inlet according to the air pressure change in the clothes processing barrel. The present invention adds a condensing box to the rear of the clothes processing barrel and connects it to the condensing air duct for use. During the drying process, when the air pressure in the barrel is too high, the hot and humid air in the barrel can be quickly condensed through the condensing box and discharged into the condensing air duct through the drain port. Compared with the original connection method {the exhaust of the clothes processing barrel enters the water box}, the phenomenon of high temperature and condensation in the water box is avoided, and the drying internal circulation and the pressure relief and water inlet of the clothes processing barrel can be integrated.

Description

Technical Field

[0001] The present invention relates to the technical field of washing machines, and in particular to a washing machine. Background Art

[0002] Existing washing machines use electric heating tubes or PTC heating to heat the air to replace the moisture in the load in the barrel, and then dehumidify through water condensation or direct discharge, and the cycle continues until the load is dry.

[0003] The main advantages of this technology are simple structure, low cost, and public acceptance. However, it also has drawbacks such as easy deformation of high-end materials, low condensation rate, high water and power consumption, long drying time, condensation in the water box, and lint and dirt blockage in the air duct. Summary of the Invention

[0004] To overcome the problems of low condensation rate, high water and power consumption, long drying time, condensation in the water box, and blockage of air duct by lint in washing machines in the related art during condensation, an embodiment of the present invention provides a washing machine comprising:

[0005] laundry disposal tub;

[0006] The condensation air duct is arranged at the rear of the clothes processing tub and is connected to the clothes processing tub;

[0007] The condensation box is arranged at the rear of the laundry processing tub. The condensation box has an air inlet and an exhaust port. The air inlet is connected to the laundry processing tub, and the exhaust port is connected to the external environment of the condensation box. The condensation box also has a water inlet and a drain port. The drain port is connected to the condensation duct.

[0008] A pressure relief device is provided at the air inlet position, and the pressure relief device can be controlled to open or close the air inlet according to the change of air pressure in the clothes processing tub.

[0009] In the above technical solution, the washing machine also includes:

[0010] The refrigeration device is thermally coupled to the condensation box and is used to condense the gas when the condensation box is fed with air and to cool the water when the condensation box is fed with water.

[0011] In the above technical solution, the refrigeration device includes a semiconductor refrigeration plate arranged on the condensation box, the semiconductor refrigeration plate has a cold end and a hot end, the cold end is arranged on the inner wall surface of the condensation box, and the hot end is arranged on the outer wall surface of the condensation box.

[0012] In the above technical solution, the exhaust port has an air inlet end and an air outlet end, the air inlet end of the exhaust port is connected to the interior of the condensation box, and the air outlet end is connected to the air guide;

[0013] The air guide member has an air guide port, and the air outlet direction of the air guide port is opposite to the hot end of the semiconductor refrigeration plate.

[0014] In the above technical solution, the air guide member includes an air guide pipe connected to the exhaust port, and the air outlet end of the air guide pipe forms the air guide port;

[0015] The air guide port is constructed in a bell-mouth shape.

[0016] In the above technical solution, the outer periphery of the condensation box is provided with a mounting groove, and the semiconductor refrigeration plate has an outer peripheral surface between the cold end and the hot end;

[0017] At least a portion of the outer peripheral surface of the semiconductor refrigeration plate is installed in contact with the groove surface of the installation groove.

[0018] In the above technical solution, the condensation box is a polygonal box body, and its outer periphery has a plurality of adjacent planes;

[0019] Each plane is provided with a mounting groove, and each mounting groove is provided with a semiconductor cooling plate.

[0020] In the above technical solution, the condensation box has a top and a bottom formed opposite to each other and a peripheral portion between the top and the bottom, and the bottom of the condensation box is fixedly connected to the top of the laundry treatment tub;

[0021] The air inlet is arranged at the bottom of the condensation box, the air outlet and the water inlet are arranged at the top of the condensation box, and the water outlet is arranged at the outer periphery of the condensation box.

[0022] In the above technical solution, the air inlet has an air inlet end and an air outlet end, the air inlet end is connected to the clothes processing tub, and the air outlet end is connected to the interior of the condensation box, wherein the air outlet end is arranged inside the condensation box and is spaced apart from the bottom of the condensation box;

[0023] The drain outlet has a water inlet end and a drain end, the water inlet end is connected to the inside of the condensation box, the drain end is connected to the condensation air duct, and the water inlet end has the lowest water inlet position;

[0024] The air outlet end of the air inlet is located higher than the lowest water inlet position of the water inlet in the height direction of the clothes processing tub.

[0025] In the above technical solution, the washing machine also includes:

[0026] The water inlet valve is connected to the water inlet through the water inlet pipe, and the flow cross-sectional area of ​​the water inlet is larger than the flow cross-sectional area of ​​the drain outlet;

[0027] Water level sensor: The water level sensor is located inside the condensation box and is used to monitor the water level in the condensation box;

[0028] The controller is used to control the opening and closing of the water inlet valve according to the water level data monitored by the water level sensor.

[0029] In the above technical solution, the laundry treatment tub comprises an outer tub and an inner tub, wherein the outer tub is provided with an air outlet and the inner tub is provided with an air inlet;

[0030] The washing machine is connected to an external drying duct between the air outlet and the air inlet, and the external drying duct, the outer drum and the inner drum form a drying duct for circulating drying airflow;

[0031] The outer drying air duct includes the condensing air duct and the heating air duct, the inlet end of the condensing air duct is connected to the clothes processing tub, the outlet end of the condensing air duct is connected to the inlet end of the heating air duct, and the heating air duct is connected to the air inlet of the inner tub;

[0032] The washing machine further comprises a fresh air duct, one end of which is connected to the external drying duct or the outer tub, and the other end of which is connected to the external air of the clothes processing tub;

[0033] When the fresh air duct is connected to the external drying air duct, the connection position between the fresh air duct and the external drying air duct is close to the air inlet side of the inner barrel.

[0034] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0035] In the embodiment of the present invention, a condensation box is added to the rear of the clothes treatment barrel, and is used after being connected to the condensation air duct. By arranging an air inlet, an exhaust port, a water inlet, and a drain port on the condensation box, and adding a pressure relief device at the air inlet position, the air pressure in the barrel is balanced {the intake air is discharged through the exhaust port, thereby balancing the air pressure in the barrel}, and the hot and humid air in the barrel can also be brought into the condensation box. During the drying process, when the barrel pressure is too high, the hot and humid air in the barrel can be quickly condensed through the condensation box and discharged into the condensation air duct through the drain port. Compared with the original connection method {the exhaust of the clothes treatment barrel enters the water box}, the phenomenon of high temperature and condensation in the water box is avoided, and the drying internal circulation and the pressure relief and water inlet of the clothes treatment barrel can be integrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0037] Figure 1 This is a schematic diagram of the condensation principle of a washing machine embodiment of the present invention, where the arrows in the figure indicate the flow direction of the hot and humid air flow;

[0038] Figure 2 Schematic diagram of the overall structure of the clothes processing tub in the embodiment of the washing machine of the present invention;

[0039] Figure 3 A schematic diagram of a partial structure of a clothes processing tub in an embodiment of a washing machine of the present invention;

[0040] Figure 4 Schematic diagram of the three-dimensional structure of the condensation box in the washing machine embodiment of the present invention;

[0041] Figure 5 It is a schematic diagram of the three-dimensional structure of the semiconductor refrigeration plate in the washing machine embodiment of the present invention.

[0042] Among them: 1-clothing treatment barrel; 2-condensation air duct; 3-condensation box; 31-air inlet; 32-exhaust outlet; 33-water inlet; 34-drain outlet; 4-semiconductor refrigeration plate; 41-cold end; 42-hot end; 5-pressure relief device; 6-water inlet valve; 7-water inlet pipe. DETAILED DESCRIPTION

[0043] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, like numbers in different figures represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present invention as detailed in the appended claims.

[0044] Currently, existing washing machines use electric heating tubes or PTC heating to heat the air to replace the moisture in the load in the barrel, and then dehumidify through water condensation or direct discharge, and the cycle continues until the load is dry.

[0045] However, washing machines using this drying method have drawbacks such as high-end clothing being easily deformed, having a low condensation rate, high water and power consumption, long drying times, condensation in the water box, and blockage of the air duct by hair and dirt. In an embodiment of the present invention, a condensation box is added to the rear of the clothing processing barrel and connected to the condensation duct for use. By providing an air inlet, an exhaust port, a water inlet, and a drain port on the condensation box, and adding a pressure relief device at the air inlet position, the air pressure in the barrel is balanced (the air inlet is discharged through the exhaust port, thereby balancing the air pressure in the barrel) while also bringing the hot and humid air in the barrel into the condensation box. During the drying process, if the barrel pressure is too high, the hot and humid air in the barrel can be quickly condensed through the condensation box and discharged into the condensation duct through the drain port. Compared to the original connection method (exhaust from the clothing processing barrel into the water box), this avoids the phenomenon of high temperature and condensation in the water box, and can integrate the drying internal circulation and the pressure relief and water inlet of the clothing processing barrel.

[0046] The following is combined with Figure 1-5 The technical solution of this embodiment is described in detail. The following implementation methods and embodiments can be combined with each other unless there is any conflict.

[0047] Example

[0048] like Figure 1As shown, this embodiment provides a washing machine, comprising:

[0049] Clothes processing tub 1;

[0050] The condensing air duct 2 is provided at the rear of the laundry processing tub 1 and is in communication with the laundry processing tub 1;

[0051] The condensation box 3 is arranged at the rear of the laundry treatment tub 1. The condensation box 3 has an air inlet 31 and an exhaust port 32. The air inlet 31 is connected to the laundry treatment tub 1, and the exhaust port 32 is connected to the external environment of the condensation box. The condensation box 3 also has a water inlet 33 and a drain port 34. The drain port 34 is connected to the condensation duct 2.

[0052] Among them Figure 5 As shown, a pressure relief device 5 is further provided at the position of the air inlet 31, and the pressure relief device 5 can be controlled to open or close the air inlet 31 according to the air pressure change in the laundry treatment tub 1. Preferably, the pressure relief device is a pneumatic rod pressure relief device.

[0053] In this embodiment of the present invention, a condenser box 3 is added to the rear of the laundry tub 1 and connected to the condensation duct 2. By providing an air inlet 31, an exhaust port 32, a water inlet 33, and a drain port 34 on the condenser box 3, and adding a pressure relief device 5 at the air inlet, the air pressure in the tub is balanced (the intake air is discharged through the exhaust port 32, thereby balancing the air pressure in the tub) while also bringing the hot and humid air in the tub into the condenser box 3. During the drying process, if the tub pressure is too high, the hot and humid air in the tub can be condensed through the condenser box 3 and discharged into the condensation duct 2 through the drain port 34. Compared to the original connection method (where the laundry tub exhaust enters the water box), this avoids the generation of high temperatures and condensation in the water box, and can integrate the drying internal circulation and the pressure relief and water inlet of the laundry tub.

[0054] Further, such as Figure 4 and Figure 5 As shown, the washing machine also includes:

[0055] The refrigeration device is thermally coupled to the condensation box 3 and is used to condense the gas to generate condensed water when the condensation box 3 takes in air, and to cool the water when the condensation box 3 takes in water.

[0056] Since a refrigeration device is provided in the embodiment of the present invention, the hot and humid air entering the condensation box 3 through the air inlet 31 can be quickly condensed, and the water entering the condensation box 3 through the water inlet 33 can be quickly cooled, and the cooled water can be discharged into the condensation duct 2 through the drain outlet to condense with the hot and humid air flow in the barrel, thereby improving the condensation efficiency.

[0057] Specifically, such as Figure 4As shown, the refrigeration device includes a semiconductor refrigeration plate 4 arranged on the condensation box 3, and the semiconductor refrigeration plate 4 has a cold end 41 and a hot end 42. The cold end 41 is arranged on the inner wall surface of the condensation box, and the hot end 42 is arranged on the outer wall surface of the condensation box 3. Specifically, the cold end 41 serves as at least part of the inner wall surface of the condensation box 3, and the hot end 42 serves as at least part of the outer wall surface of the condensation box 3.

[0058] In the embodiment of the present invention, the semiconductor refrigeration sheet 4 is used as the cooling source in the condensation box 3, so that the overall design size of the condensation box can be reduced {since there is no traditional compressor and other structures, the overall structural size is controlled within a smaller range}. At the same time, due to the refrigeration characteristics of the semiconductor refrigeration sheet 4 {one side cools and the opposite side heats}, in this embodiment, the cold end 41 of the semiconductor refrigeration sheet 4 is set inside the condensation box 3, and the hot end 42 of the semiconductor refrigeration sheet 4 is set outside the condensation box 3. In this way, it can be ensured that the cold end 41 can cool the inside of the condensation box 3, and the hot end 42 can be prevented from affecting the internal temperature of the condensation box 3.

[0059] Furthermore, the exhaust port 32 has an air inlet end and an air outlet end. In some embodiments not shown in the figures, the air inlet end of the exhaust port 32 is connected to the interior of the condensation box 3 and the air outlet end is connected to an air guide.

[0060] The air guide member has an air guide port, and the air outlet direction of the air guide port is opposite to the hot end 42 of the semiconductor cooling plate 4.

[0061] In the embodiment of the present invention, an air guide is provided at the exhaust port 32, and the air outlet direction of the air guide is set to be opposite to the hot end 42 of the semiconductor refrigeration plate 4. The condensed dry hot air can be fully utilized to dissipate the heat from the hot end of the semiconductor refrigeration plate 4, thereby preventing the hot end 42 of the semiconductor refrigeration plate 4 from overheating and affecting the surrounding electrical components.

[0062] That is, in the embodiment of the present invention, on the one hand, by providing the semiconductor refrigeration plate 4, the size of the entire refrigeration device can be reduced while ensuring the refrigeration effect, avoiding occupying a large space. On the other hand, the dry cold gas discharged through the exhaust port 33 {relative to the gas in the barrel} can also fully dissipate the heat of the hot end of the semiconductor refrigeration plate 4.

[0063] That is, the exhaust port 33 in the embodiment of the present invention can not only balance the air pressure in the barrel by exhausting the gas, but also use the exhausted gas to fully dissipate heat from the hot end of the semiconductor refrigeration plate 4.

[0064] Specifically, the air guide member includes an air guide pipe connected to the exhaust port 32, and the air outlet end of the air guide pipe forms the air guide port;

[0065] The air guide port is constructed in a bell-mouth shape.

[0066] In the embodiment of the present invention, by setting the shape of the air guide port to a trumpet shape, the heat dissipation effect on the hot end 42 of the semiconductor cooling plate 4 can be further improved.

[0067] In any of the above embodiments, Figure 4 As shown, the outer periphery of the condensation box 3 is provided with a mounting groove, and the semiconductor refrigeration plate 4 has an outer peripheral surface between the cold end 41 and the hot end 42;

[0068] At least a portion of the outer peripheral surface of the semiconductor cooling plate 4 is installed in contact with the groove surface of the installation groove.

[0069] Specifically, the condensation box 3 is a polygonal box body, and its outer periphery has a plurality of adjacent planes;

[0070] Each plane is provided with a mounting groove, and each mounting groove is provided with a semiconductor refrigeration plate 4. Preferably, the condensation box 3 is a square box body.

[0071] In the embodiment of the present invention, by configuring the condensation box 3 as a polygonal box body, the number of semiconductor refrigeration sheets 4 that can be installed can be increased, thereby improving the refrigeration capacity.

[0072] In any of the above embodiments, Figure 2 and Figure 3 As shown, the condensation box 3 has a top and a bottom formed opposite to each other and a peripheral portion between the top and the bottom. The bottom of the condensation box 3 is fixedly connected to the top of the laundry treatment tub 1.

[0073] The air inlet 31 is provided at the bottom of the condensation box 3 , the air outlet 32 ​​and the water inlet 33 are provided at the top of the condensation box 3 , and the water outlet 34 is provided at the outer periphery of the condensation box 3 .

[0074] In the embodiment of the present invention, the condensation box 3 is arranged at the top of the clothing treatment tub 1 and the air inlet 31 is arranged at the bottom of the condensation box 3. In this way, when the air pressure in the tub is too high, the air pressure in the tub can be quickly balanced {because the hot and humid air in the tub floats upward, the condensation box 3 is arranged at the top of the clothing treatment tub 1, so that the air in the tub can quickly enter the condensation box 3 through the air inlet 31}.

[0075] In any of the above embodiments, the air inlet has an air inlet end and an air outlet end, the air inlet end is connected to the clothes processing tub 1, and the air outlet end is connected to the interior of the condensation box 3, wherein the air outlet end is arranged inside the condensation box 3 and is spaced apart from the bottom of the condensation box 3;

[0076] The drain port 34 has a water inlet end and a drain end, the water inlet end is connected to the interior of the condensation box 3, and the drain end is connected to the condensation air duct 2, and the water inlet end has the lowest water inlet position;

[0077] The air outlet end of the air inlet 31 is located higher than the lowest water inlet position of the water inlet end in the height direction of the laundry treatment tub 1 .

[0078] In the embodiment of the present invention, the air outlet position of the air inlet 31 is set to be higher than the drainage position of the drainage port 34, so that water in the condensation box 3 can be prevented from entering the tub through the air inlet 31 and wetting the clothes.

[0079] Further, such as Figure 1 As shown, the washing machine also includes:

[0080] The water inlet valve 6 is connected to the water inlet 33 through the water inlet pipe 7. The flow cross-sectional area of ​​the water inlet 33 is larger than the flow cross-sectional area of ​​the drain outlet 34;

[0081] Water level sensor {not shown in the figure}, the water level sensor is provided inside the condenser 3 and is used to monitor the water level in the condenser box 3;

[0082] The controller is used to control the opening and closing of the water inlet valve 6 according to the water level data monitored by the water level sensor.

[0083] In the embodiment of the present invention, by setting the flow cross-sectional area of ​​the water inlet 33 to be larger than the flow cross-sectional area of ​​the water outlet 34 , the water in the condensation box 3 can be fully cooled, thereby improving the condensation efficiency.

[0084] At the same time, in order to prevent the water level in the condensation box 3 from exceeding the preset water level, a water level sensor is set in the condensation box 3 to detect the water level height. Specifically, when the water level in the condensation box 3 exceeds the preset water level, the water inlet valve 6 is controlled to be closed, and when the water level in the condensation box 3 falls back to the preset water level or below, the water inlet valve is controlled to be opened.

[0085] In any of the above embodiments, the clothing processing barrel includes an outer barrel and an inner barrel, wherein the outer barrel is provided with an air outlet and the inner barrel is provided with an air inlet; preferably, the air inlet of the inner barrel is directly realized by the clothing loading port of the inner barrel, and the external drying air duct supplies air to the clothing loading port of the inner barrel through the door seal of the washing machine.

[0086] The washing machine is connected to an external drying duct between the air outlet and the air inlet, and the external drying duct, the outer drum and the inner drum form a drying duct for the circulation of drying air flow;

[0087] The outer drying duct includes a condensing duct and a heating duct. The inlet end of the condensing duct is connected to the clothes processing tub 1, the outlet end of the condensing duct is connected to the inlet end of the heating duct, and the heating duct is connected to the air inlet of the inner tub.

[0088] The washing machine also includes a fresh air duct, one end of which is connected to the external drying duct or the outer tub, and the other end is connected to the external air of the clothes processing tub;

[0089] When the fresh air duct is connected to the external drying air duct, the connection position between the fresh air duct and the external drying air duct is close to the air inlet side of the inner barrel.

[0090] Other embodiments of the present invention will readily occur to those skilled in the art after considering the specification and practicing the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow from the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0091] It should be understood that the present invention is not limited to the exact construction described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A washing machine, characterized in that: include: Clothes treatment tub (1); a condensing air duct (2), the condensing air duct (2) being arranged at the rear of the clothes processing tub (1) and being in communication with the clothes processing tub (1); A condensation box (3), the condensation box (3) being arranged at the rear of the clothes processing tub (1), the condensation box (3) having an air inlet (31) and an air outlet (32), the air inlet (31) being in communication with the clothes processing tub (1), and the air outlet (32) being in communication with the external environment of the condensation box, the condensation box (3) also having a water inlet (33) and a water outlet (34), the water outlet (34) being in communication with the condensation air duct (2); A pressure relief device (5) is provided at the position of the air inlet (31), and the pressure relief device (5) can be controlled to open or close the air inlet (31) according to the change of air pressure in the laundry treatment tub (1).

2. The washing machine according to claim 1, wherein The washing machine also includes: A refrigeration device is thermally coupled to the condensation box (3) and is used for condensing gas when air enters the condensation box (3) and cooling water when water enters the condensation box (3).

3. The washing machine according to claim 2, characterized in that The refrigeration device comprises a semiconductor refrigeration plate (4) arranged on the condensation box (3), the semiconductor refrigeration plate (4) having a cold end (41) and a hot end (42), the cold end (41) being arranged on the inner wall surface of the condensation box (3), and the hot end (42) being arranged on the outer wall surface of the condensation box (3).

4. The washing machine according to claim 3, characterized in that The exhaust port (32) has an air inlet end and an air outlet end, the air inlet end of the exhaust port (32) is connected to the interior of the condensation box (3), and the air outlet end is connected to an air guide; The air guide member has an air guide port, and the air outlet direction of the air guide port is opposite to the hot end (42) of the semiconductor refrigeration plate (4).

5. The washing machine according to claim 4, characterized in that The air guide member comprises an air guide pipe connected to the exhaust port (32), and the air outlet end of the air guide pipe forms the air guide port; The air guide port is configured in a bell-mouth shape.

6. The washing machine according to any one of claims 3 to 5, characterized in that: The outer periphery of the condensation box (3) is provided with a mounting groove, and the semiconductor refrigeration plate (4) has an outer peripheral surface between a cold end (41) and a hot end (42); At least part of the outer peripheral surface of the semiconductor refrigeration plate (4) is installed in contact with the groove surface of the installation groove.

7. The washing machine according to claim 6, characterized in that The condensation box (3) is a polygonal box body, and its outer periphery has a plurality of adjacent planes; Each of the planes is provided with the installation groove, and each of the installation grooves is provided with a semiconductor refrigeration plate (4).

8. The washing machine according to any one of claims 2 to 5, characterized in that: The condensation box (3) has a top and a bottom formed opposite to each other and a peripheral portion between the top and the bottom, and the bottom of the condensation box (3) is fixedly connected to the top of the laundry treatment tub (1); The air inlet (31) is provided at the bottom of the condensation box (3), the air outlet (32) and the water inlet (33) are provided at the top of the condensation box (3), and the water outlet (34) is provided at the outer periphery of the condensation box (3).

9. The washing machine according to claim 1, wherein The air inlet has an air inlet end and an air outlet end, the air inlet end is in communication with the clothes processing tub (1), and the air outlet end is in communication with the interior of the condensation box (3), wherein the air outlet end is arranged inside the condensation box (3) and is spaced apart from the bottom of the condensation box (3); The drain port (34) has a water inlet end and a drain end, the water inlet end is in communication with the interior of the condensation box (3), and the drain end is in communication with the condensation air duct (2), and the water inlet end has a lowest water inlet position; The air outlet end position of the air inlet (31) is higher than the lowest water inlet position of the water inlet end in the height direction of the laundry treatment tub (1).

10. The washing machine according to claim 1, wherein The washing machine also includes: a water inlet valve (6), the water inlet valve (6) being in communication with the water inlet (33) via a water inlet pipe (7), the flow cross-sectional area of ​​the water inlet (33) being larger than the flow cross-sectional area of ​​the drain outlet (34); a water level sensor, the water level sensor being arranged inside the condensation box (3) and being used to monitor the water level in the condensation box (3); A controller is used to control the opening and closing of the water inlet valve (6) according to water level data monitored by the water level sensor.

11. The washing machine according to claim 1, wherein The laundry treatment tub comprises an outer tub and an inner tub, wherein the outer tub is provided with an air outlet and the inner tub is provided with an air inlet; The washing machine is connected to an external drying duct between the air outlet and the air inlet, and the external drying duct, the outer tub and the inner tub form a drying duct for circulating drying airflow; The outer drying air duct includes the condensing air duct and the heating air duct, the inlet end of the condensing air duct is connected to the clothes processing barrel (1), the outlet end of the condensing air duct is connected to the inlet end of the heating air duct, and the heating air duct is connected to the air inlet of the inner barrel; The washing machine further comprises a fresh air duct, one end of which is connected to the external drying duct or the outer tub, and the other end of which is connected to the external air of the clothes processing tub; When the fresh air duct is connected to the external drying air duct, the connection position between the fresh air duct and the external drying air duct is close to the air inlet side of the inner barrel.

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