EP4606945A1

EP4606945A1 - Drying air duct assembly and laundry treatment device comprising same

Info

Publication number: EP4606945A1
Application number: EP23879066.1A
Authority: EP
Inventors: Zhiqiang Zhao; Sheng Xu; Peishi Lv
Original assignee: Qingdao Haier Washing Machine Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Washing Machine Co Ltd; Haier Smart Home Co Ltd
Priority date: 2022-10-21
Filing date: 2023-10-16
Publication date: 2025-08-27
Also published as: JP2025534793A; AU2023363913A1; EP4606945A4; CN117917495B; CN117917495A; WO2024083077A1

Abstract

The present invention relates to the technical field of laundry treatment devices, and particularly, provides a drying air duct assembly and a laundry treatment device including the same, aiming at solving the problem that the existing drying air duct assembly cannot accurately acquire the temperature in the air duct and thus affects the use experience. Therefore, the drying air duct assembly of the present invention includes a housing, a blower, a heating member and a temperature control member. The housing is provided with an air inlet and an air outlet, the blower is configured to be able to introduce an airflow outside the housing into the housing, the heating member is disposed inside the housing and is provided with a heating air duct, the temperature control member is disposed inside the heating air duct and is used to detect temperature within the heating air duct, and the temperature control member is connected in series with a heating body to form a loop, and opens the loop in a case where the temperature within the heating air duct is greater than a set temperature. The present invention can accurately monitor the temperature within the heating air duct, achieve a more accurate high-temperature hot air, and meanwhile, can prevent the drying air duct component from being burned out due to over-high temperature within the heating air duct.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application claims the priority to the China patent application CN202211295427.X titled "DRYING AIR DUCT ASSEMBLY AND LAUNDRY TREATMENT DEVICE INCLUDING THE SAME" filed on Oct. 21, 2022 , the entirety of which is incorporated into the present application by reference.

TECHNICAL FIELD

The present invention relates to the technical field of laundry treatment devices, and in particular, provides a drying air duct assembly and a laundry treatment device including the same.

BACKGROUND

As common household appliances in daily life, laundry treatment devices have brought tremendous convenience to people's lives. The laundry treatment devices mainly include washing machines, laundry care machines, laundry dryers and so on. The laundry treatment device usually has a drying function, for heating an airflow flowing through a heating air duct through a heating member to generate hot air, thereby accelerating the drying of laundry.
A drying air duct assembly of the existing laundry treatment device generally features a temperature sensor installed on an outer shell of the heating air duct, to control temperature within the heating air duct. However, since the temperature sensor disposed on the outer shell of the heating air duct indirectly reflects the temperature within the heating air duct by measuring the temperature of the outer shell, it is impossible to accurately acquire the temperature within the heating air duct. As a result, an accurate high-temperature hot air cannot be achieved, leading to an unsatisfactory user experience.
Therefore, there is a need in this field for a new technical solution to solve the above problem.

SUMMARY

The present invention aims to solve the above technical problem, that is, to solve the problem that the existing drying air duct assembly is unable to accurately acquire the temperature within the heating air duct, resulting in failing to achieve accurate high-temperature hot air and consequently affecting the user experience.
The present invention provides a drying air duct assembly. The drying air duct assembly of the present invention includes: a housing, provided with an air inlet and an air outlet; a blower, configured to be able to introduce an airflow outside the housing into the housing through the air inlet; a heating member, disposed inside the housing and positioned between the air inlet and the air outlet, the heating member having a heating air duct, an inlet end of the heating air duct communicating with the air inlet such that the airflow entering into the housing through the air inlet flows into the heating air duct, the heating member including a heating body which is capable of heating the airflow flowing through the heating air duct, and an outlet end of the heating air duct communicating with the air outlet such that hot airflow inside the heating air duct flows out of the air outlet; and a temperature control member, disposed inside the heating air duct, the temperature control member being connected in series with the heating body of the heating member to form a closed loop, and the temperature control member being used to detect temperature within the heating air duct, and open the loop in a case where the temperature within the heating air duct is greater than a set temperature.
In a preferred technical solution of the above drying air duct assembly, the temperature control member includes a first over-temperature protection switch. The first over-temperature protection switch is connected in series with the heating body and is configured to open the loop in a case where the temperature within the heating air duct exceeds a first set temperature. The first over-temperature protection switch is further configured to close the loop in a case where the temperature within the heating air duct is lower than the first set temperature.
In a preferred technical solution of the above drying air duct assembly, the temperature control member further includes a second over-temperature protection switch. The second over-temperature protection switch is connected in series with both of the first over-temperature protection switch and the heating body, and the second over-temperature protection switch is configured to open the loop in a case where the temperature within the heating air duct exceeds a second set temperature, and not to close the loop in a case where the temperature within the heating air duct is lower than the second set temperature, where the first set temperature is lower than the second set temperature.
In a preferred technical solution of the above drying air duct assembly, the heating member further includes a supporting skeleton and an insulating shell, the supporting skeleton and the heating body both are disposed inside the insulating shell, the heating air duct is formed inside the insulating shell, and the heating body is a superconducting heating wire which is wound around the exterior of the supporting skeleton.
In a preferred technical solution of the above drying air duct assembly, the drying air duct assembly further includes a sliding plate and a driving mechanism. The temperature control member is installed on the sliding plate, and the driving mechanism is configured to be able to drive the sliding plate to move relative to the supporting skeleton, so as to move the sliding plate out of the heating air duct.
In a preferred technical solution of the above drying air duct assembly, the driving mechanism includes an electromagnetic member. The sliding plate is magnetic. When energized, the electromagnetic member can generate a magnetic attraction force on the sliding plate so as to force the sliding plate to move out of the heating air duct. The driving mechanism further includes an elastic reset member, which enables the sliding plate to move back into the heating air duct after the electromagnetic member is deenergized.
In a preferred technical solution of the above drying air duct assembly, the drying air duct assembly further includes a first cord take-up member and a second cord take-up member which are respectively positioned at two ends of the temperature control member. When the sliding plate moves out of the heating air duct, a power cord inside the first cord take-up member is released, enabling the sliding plate to move towards the second cord take-up member, and a power cord between the sliding plate and the second cord take-up member to be retracted into the second cord take-up member. When the sliding plate is moved back into the heating air duct, a power cord inside the second cord take-up member is released, enabling the sliding plate to move towards the first cord take-up member, and a power cord between the sliding plate and the first cord take-up member to be retracted into the first cord take-up member.
In a preferred technical solution of the above drying air duct assembly, the drying air duct assembly further includes a backdraft prevention member disposed at the air outlet. The backdraft prevention member is configured to be able to open the air outlet, to allow the airflow inside the heating air duct to flow out of the air outlet. The backdraft prevention member is further configured to be able to close the air outlet, to prevent foreign matters outside the housing from entering the housing through the air outlet.
In a preferred technical solution of the above drying air duct assembly, the backdraft prevention member includes a plurality of sealing substrates and a plurality of valve plates. The plurality of the sealing substrates and the plurality of the valve plates are sequentially distributed at intervals. The sealing substrates are installed on the housing to divide the air outlet into a plurality of air outlet channels. The valve plates are pivotally connected with the housing. The valve plates are configured to be able to abut against the sealing substrates to close the air outlet channels when they are in a first working state, and move away from the sealing substrates to open the air outlet channels when they are in a second working state.
In a second aspect, the present invention provides a laundry treatment device. The laundry treatment device of the present invention includes the drying air duct assembly as described above.
In a case where the above technical solution condition is employed, by disposing the temperature control member in the heating air duct, on the one hand, the temperature within the heating air duct can be accurately monitored, thereby achieving a more accurate high-temperature hot air, improving the drying efficiency and shortening the time for the drying; and on the other hand, the loop can be opened when the temperature within the heating air duct exceeds the set temperature, thereby avoiding the drying air duct assembly from being burned out due to over-high temperature of the hot air inside the heating air duct, and further avoiding potential safety hazards.
Further, by disposing the first over-temperature protection switch, the temperature of the hot air inside the heating air duct can be detected more accurately, and the loop can be opened when the temperature of the hot air inside the heating air duct is over high, thereby preventing the superconducting heating wire from being continuously heated and causing the temperature within the heating air duct to continuously raise and deviate from the set temperature. At the same time, the loop can be closed when the temperature of the hot air inside the heating air duct is lower than the set temperature, enabling the superconducting heating wire to be continuously heated and raise the temperature within the heating air duct rise to reach the set temperature, thereby more accurately controlling the temperature of the hot air inside the heating air duct. By disposing the second over-temperature protection switch, in a case where the first over-temperature protection switch fails and when it is detected that the temperature within the heating air duct continuously rises and exceeds the second set temperature, the loop can be opened, preventing the superconducting heating wire from being continuously heated and burning up the housing, thereby avoiding scald or fire, achieving a double over-temperature protection for the drying air duct, and enhancing the use safety of the laundry treatment device.
Furthermore, compared with a configuration where the heating member is arranged in the form of a heating tube or a heating ring, the configuration where the heating member is wound around the supporting skeleton as the superconducting heating wire, on the one hand, avoid the phenomenon that the surface of the heating tube in the prior art is burned red, thereby preventing potential safety hazards such as scald and fire, and greatly improving the safety for the drying air duct; and on the other hand, can raise the temperature quickly and improve the heating efficiency, due to the advantages of the superconducting heating wire such as low thermal resistance and high heat exchange efficiency, thereby greatly improving the drying efficiency of the laundry treatment device. Meanwhile, the superconducting heating wire has the characteristics of rapid heat dissipation and cooling upon power failure, which can reduce the heat loss, improve the heat utilization rate and reduce the energy waste.
Furthermore, by disposing the sliding plate and the driving mechanism, and installing the temperature control member on the sliding plate, on the one hand, compared with a configuration where the temperature control member is directly placed inside the heating air duct, the temperature control member can be prevented from shaking inside the heating air duct to affect the accuracy of the temperature control member, thereby enabling the hot air inside the heating air duct to be detected more accurately; and on the other hand, when in normal use, the temperature control member is installed on the sliding plate and moves into the heating air duct with the sliding plate, which facilitates the detection of the temperature within the heating air duct, and when the temperature control member needs to be repaired or replaced, the sliding plate can be driven to move relative to the supporting skeleton by the driving mechanism, thereby enabling the sliding plate to move out of the heating air duct, further facilitating the repair of the temperature control member, and improving the repairing efficiency.
Furthermore, compared with a configuration where the driving mechanism is arranged in the form of a motor, disposing the driving mechanism as an electromagnetic member can avoid using the motor, thereby reducing the cost of the driving mechanism, and further reducing the cost of the drying air duct assembly. At the same time, the structure of the driving mechanism can be simplified, improving the simplicity of the drying air duct assembly.
Furthermore, by disposing the first cord take-up member and the second cord take-up member, the power cord can be retracted into the first cord take-up member or the second cord take-up member when the sliding plate moves out of the heating air duct or moves back into the heating air duct, preventing the power cord from being accumulated and entangled, and further facilitating the repair of the temperature control member.
Furthermore, by disposing the backdraft prevention member, on the one hand, the laundry foams or clothes flocks in the laundry treatment device can be prevented from entering the drying air duct assembly through the air outlet when the drying air duct assembly is not in operation, thereby avoiding the blockage of the drying air duct assembly; and on the other hand, the air outlet can be opened to allow the airflow inside the heating air duct to flow out of the air outlet when the drying air duct assembly is in operation, facilitating the delivery of the hot air, thereby avoiding affecting the normal use of the drying air duct assembly.
Furthermore, on the one hand, compared with a configuration where the backdraft prevention member is arranged in the form of motors and valve plates, disposing the backdraft prevention member in the form of sealing substrates and valve plates can avoid using the motor, thereby reducing the cost of the backdraft prevention member, and further reducing the cost of the drying air duct assembly. At the same time, the structure of the drying air duct assembly can be simpler and lighter. On the other hand, by disposing a plurality of sealing substrates and a plurality of valve plates, the hot air blown out of the air outlet can be divided into a plurality of airflows, enabling the hot air to be blown into a drying chamber of the laundry treatment device more evenly, thereby improving the drying effect.
In addition, the laundry treatment device further provided by the present invention on the basis of the above technical solution has the beneficial effects of the above drying air duct assembly due to the employment of the above-introduced drying air duct assembly. Compared with the laundry treatment device before improvement, the temperature of the hot air of the laundry treatment device of the present invention is more accurate, the drying efficiency is higher, the safety for the device is higher, the structure is simpler, the cost is lower, the repair of the laundry treatment device is more convenient, and the user experience is better.

BRIEF DESCRIPTION OF THE DRAWINGS

Preferred implementations of the present invention will be described with reference to the accompanying drawings, in which:

Fig. 1 is a first structural schematic diagram of a drying air duct assembly of the present invention;
Fig. 2 is a second structural schematic diagram of a drying air duct assembly of the present invention;
Fig. 3 is a structural schematic diagram of a section view taken along line A-A in Fig. 2;
Fig. 4 is a structural schematic diagram of a section view taken along line B-B in Fig. 3;
Fig. 5 is a structural schematic diagram with a first upper housing hidden, in Fig. 1 hidden;
Fig. 6 is a structural schematic diagram with an insulating shell partially hidden, in Fig. 5;
Fig. 7 is a partially enlarged schematic diagram at C in Fig. 3;
Fig. 8 is a structural schematic diagram of a heating member of the present invention;
Fig. 9 is a structural schematic diagram of a heating member, a temperature control member, a sliding plate and a driving mechanism of the present invention; and
Fig. 10 is a structural schematic diagram of a first cord take-up member of the present invention.

List of reference numerals:

1: Housing; 101: Air Inlet; 102: Air Outlet; 11: Upper Housing; 1101: First Upper Housing; 1102: Second Upper Housing; 12: Lower Housing; 13: Clip-on Limiting Rib; 14: Sealing Element; 15: Fastening Hole; 16: Fixing Post; 161: Bolt Hole; 2: Blower; 30: Heating Air Duct; 301: Inlet End; 302: Outlet End; 31: Superconducting Heating Wire; 32: Supporting Skeleton; 321: Sliding Slot; 322: Groove; 33: Insulating Shell; 41: Sliding Plate; 411: Sliding Block; 42: Driving Mechanism; 421: Electromagnetic Member; 422: Elastic Reset Member; 431: First Cord Take-Up Member; 4311: Cord Take-Up body; 4312: Cord Take-Up Spool; 43121: First Limiting Portion; 43122: Second Limiting Portion; 4313: Torsion Spring; 432: Second Cord Take-Up Member; 5: Backdraft prevention Member; 51: Sealing Substrate; 52: Valve Plate; 53: Rotating Shaft; 6: Power Cord; 7: Temperature Control Member; 71:First Over-Temperature Protection Switch; 72: Second Over-Temperature Protection Switch.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Preferred implementations of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that such implementations are merely used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.
It should be noted that in the description of the present invention, terms indicating directions or positional relationships such as "upper," "lower," "inner," "outer," and "top" are based on the directions or positional relationships shown in the accompanying drawings, which is merely for the convenience of description, and does not indicate or imply that the stated apparatus or element must have a particular orientation, or be constructed and operated in a particular orientation. Therefore, such terms cannot be understood as a limitation of the present invention. In addition, terms such as "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.
In addition, it should also be noted that in the description of the present invention, unless otherwise expressively dictated and defined, terms such as "installation," "disposition" and "connection" should be understood in a broad sense, for example, may be a fixed connection, or a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
Referring to Figs. 1 to 3, Fig. 1 is a first structural schematic diagram of a drying air duct assembly of the present invention; Fig. 2 is a second structural schematic diagram of a drying air duct assembly of the present invention; and Fig. 3 is a structural schematic diagram of a section view taken along line A-A in Fig. 2.
Referring to Figs. 1 to 3, the drying air duct assembly of the present invention includes a housing 1, a blower 2, a heating member and a temperature control member. The housing 1 is provided with an air inlet 101 and an air outlet 102, an accommodating cavity 103 (as shown in Figs. 6 and 6) is disposed inside the housing 1, and both the air outlet 102 and the air inlet 101 communicate with the accommodating cavity 103. The blower 2 is configured to be able to introduce an airflow outside the housing 1 into the housing 1 through the air inlet 101, and the air outlet 102 is communicated with a drying chamber of the laundry treatment device, so as to deliver hot air into the drying chamber.
As shown in Figs. 1 to 3, the heating member is disposed inside the accommodating cavity 103 of the housing 1 and is positioned between the air inlet 101 and the air outlet 102. The heating member is provided with a heating air duct 30. An inlet end 301 of the heating air duct 30 is communicated with the air inlet 101, allowing the airflow which enters the housing 1 through the air inlet 101 to flow into the heating air duct 30. The heating member includes a heating body which is capable of heating the airflow flowing through the heating air duct 30. An outlet end 302 of the heating air duct 30 is communicated with the air outlet 102, allowing the hot airflow inside the heating air duct 30 to flow out of the air outlet 102. The temperature control member 7 is disposed inside the heating air duct 30, and is connected in series with the heating body of the heating member to form a closed loop. The temperature control member 7 is used to detect temperature within the heating air duct 30, and open the loop in a case where the temperature within the heating air duct 30 is greater than a set temperature.
With such a configuration, that is, by disposing the temperature control member 7 in the heating air duct 30, on the one hand, the temperature within the heating air duct 30 can be accurately monitored, thereby achieving a more accurate high-temperature hot air, improving the drying efficiency and shortening the time for the drying; and on the other hand, the loop can be opened when the temperature within the heating air duct 30 exceeds the set temperature, thereby preventing the drying air duct assembly from being burned out due to over-high temperature of the hot air inside the heating air duct 30, and further avoiding potential safety hazards.
It should be noted that in practical applications, the housing 1 may be configured integrally, or may be constructed from an upper housing and a lower housing, and so on by those skilled in the art. Such adjustments and modifications to the specific configuration of the housing 1 do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Preferably, as shown in Figs. 1 to 3, the housing 1 of the present invention is formed by connecting an upper housing 11 and a lower housing 12. The air inlet 101 is disposed on the lower housing 12, and the air outlet 102 is formed between the upper housing 11 and the lower housing 12.
With such a configuration, it is more convenient to install and disassemble the drying air duct assembly compared with a configuration where the housing 1 is arranged integrally, thereby facilitating the repair of the drying air duct assembly.
It should be noted that in practical applications, the upper housing 11 and the lower housing 12 may be fixedly connected by fasteners such as bolts, or are clamped with each other to form the housing 1, and so on by those skilled in the art. Such adjustments and modifications to the specific fixation between the upper housing 11 and the lower housing 12 do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Continuing to refer to Figs. 1 to 3, and further referring to Fig. 4, Fig. 4 is a structural schematic diagram of a section view taken along line B-B in Fig. 3.
Preferably, as shown in Figs. 1 to 4, fastening holes 15 are formed in both of the upper housing 11 and the lower housing 12 of the present invention, and the upper housing 11 and the lower housing 12 are fixedly connected by bolts. A sealing element 14 is disposed between the upper housing 11 and the lower housing 12 to seal the housing 1.
It should be noted that in practical applications, the upper housing 11 may be configured integrally, or constructed from two parts, or constructed from a plurality of parts, and so on by those skilled in the part. Such adjustments and modifications to the specific configuration of the upper housing 11 do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Preferably, as shown in Figs. 1 to 3, the upper housing 11 of the present invention includes a first upper housing 1101 and a second upper housing 1102. The first upper housing 1101 is disposed at the top of the heating member, and the first upper housing 1101 and the second upper housing 1102 both are fixedly connected with the lower housing 12 by bolts.
With such a configuration, the heating member can be overhauled by disassembling the first upper housing 1101 from the lower housing 12 (as shown in Figs. 5 and 6), eliminating the need to disassemble the entire upper housing 11 from the lower housing 12, thereby improving the overhauling efficiency.
It should be noted that in practical applications, it is not limited to configurations where the air inlet 101 is disposed on the lower housing 12 and the air outlet 102 is formed between the upper housing 11 and the lower housing 12. For example, the air inlet 101 and the air outlet 102 may be both disposed on the lower housing 12, or disposed on the upper housing 11, or disposed between the upper housing 11 and the lower housing 12, and so on. Such adjustments and modifications to the specific placement of the air inlet 101 and the air outlet 102 do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
It should also be noted that in practical applications, it is not limited to configurations where the air inlet 101 is disposed on the lower housing 12. For example, the air inlet 101 may also be disposed on the upper housing 11, and so on. Such flexible adjustments and modifications do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Definitely and preferably, the air inlet 101 is disposed on the lower housing 12, and the air outlet 102 is formed between the upper housing 11 and the lower housing 12.
It should be noted that in practical applications, the blower 2 may be disposed outside the housing 1 by those skilled in the art, where an exhaust port of the blower 2 is communicated with the air inlet 101. Alternatively, the blower 2 may be disposed inside the housing 1, where a suction port of the blower 2 is communicated with the air inlet 101 and the exhaust port of the blower 2 is communicated with the inlet end 301 of the heating channel. There may also be other possible configurations. Such adjustments and modifications to the specific placement of the blower 2 do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Preferably, as shown in Figs. 1 to 4, the blower 2 of the present invention is disposed inside the housing 1 and is positioned between the air inlet 101 and the air outlet 102, the suction port of the blower 2 is communicated with the air inlet 101, and the exhaust port of the blower 2 is communicated with the inlet end 301 of the heating air duct 30.
With such a configuration, that is, disposing the blower 2 inside the housing 1 can greatly reduce the volume of the drying air duct assembly, thereby reducing the installation space for the drying air duct assembly.
It should be noted that in practical applications, those skilled in the art may use a heating tube as the heating member, where the heating air duct 30 is formed inside the heating tube; or use a heating ring as the heating member, where the heating air duct 30 is formed inside the heating ring; or provide the heating member in the form of a heating body, a supporting skeleton or an air duct shell, where a superconducting heating wire or an electromagnetic heating coil is wound around the supporting skeleton and the heating air duct 30 is formed inside the air duct shell, and so on. Such adjustments and modifications to the specific placement of the heating member do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Continuing to refer to Figs. 3 and 4, and further referring to Figs. 5 and 6, Fig. 5 is a structural schematic diagram with the first upper housing hidden, in Fig. 1; and Fig. 6 is a structural schematic diagram with an insulating shell partially hidden, in Fig. 5.
Preferably, as shown in Figs. 3 to 6, the heating member of the present invention further includes a supporting skeleton 32 and an insulating shell 33. The supporting skeleton 32 and the heating body both are disposed inside the insulating shell 33, the heating air duct 30 is formed inside the insulating shell 33, and the heating body is a superconducting heating wire 31 which is wound around the exterior of the supporting skeleton 32.
With such a configuration, compared with the configuration where the heating member is disposed in the form of the heating tube or the heating ring, the configuration where the heating member is disposed in the form of the superconducting heating wire 31 wound around the supporting skeleton 32, on the one hand, can prevent the phenomenon that the surface of the heating tube in the prior art is burned red, thereby avoiding potential safety hazards such as scald and fire, and greatly improving the safety of the drying air duct; and on the other hand, can raise the temperature quickly and improve the heating efficiency, due to the advantages of the superconducting heating wire 31 such as low thermal resistance and high heat exchange efficiency, thereby greatly improving the drying efficiency of the laundry treatment device. At the same time, the superconducting heating wire 31 has the characteristics of rapid heat dissipation and cooling upon power failure, which can reduce the heat loss, improve the heat utilization rate and reduce the energy waste.
It should be noted that in practical applications, the heating body is not limited to the superconducting heating wire 31. For example, the heating body may also be provided as a superconducting heating sheet, and so on. Such adjustments and modifications to the specific configuration of the superconducting heating body do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention. Definitely and preferably, the heating body is provided as the superconducting heating wire 31.
It should also be noted that in practical applications, the cross section of the supporting skeleton 32 may be designed as a rectangular, circular, or X shape, and so on by those skilled in the art. Such adjustments and modifications to the specific configuration of the supporting skeleton 32 do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Preferably, as shown in Figs. 3 to 6, the supporting skeleton 32 of the present invention includes supporting plates. Four supporting plates are provided and connected with each other to form the supporting skeleton 32 with an X-shaped cross section. A plurality of grooves 322 are disposed at the edge positions of the supporting skeleton 32. The superconducting heating wire 31 is spirally wound around the X-shaped supporting skeleton 32, and is positioned inside the grooves 322 on the supporting skeleton 32.
With such a configuration, disposing the cross section of the supporting skeleton 32 as the X shape can reduce, the contact area between the superconducting heating wire 31 and the supporting skeleton 32, thereby improving the heat dissipation efficiency of the superconducting heating wire 31, and further improving the drying efficiency of the drying air duct. Disposing the plurality of grooves 322 at the edge positions of the supporting skeleton 32 and embedding the superconducting heating wire 31 into the grooves 322 can prevent the superconducting heating wire 31 from being mispositioned, and avoiding the superconducting heating wire 31 from falling off the supporting skeleton 32, thereby improving the stability of the drying air duct assembly.
It should be noted that in practical applications, the four supporting plates may be disposed integrally, or may be adhered to each other, and so on by those skilled in the art. Such flexible adjustments and modifications do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Preferably, the four supporting plates are disposed integrally.
It should be noted that in practical applications, the supporting skeleton 32 may be made of a mica material, such as a mica sheet, or may be made of a ceramic material, or may be made of a glass fiber ceramic composite material, and so on by those skilled in the art. Such adjustments and modifications to the specific materials of the supporting skeleton 32 do not deviate from the principle and scope of the present invention, and shall consequentially fall within the protection scope of the present invention.
Preferably, the supporting skeleton 32 is configured to be made of a mica sheet.
It should be noted that in practical applications, the insulating shell 33 may be made a mica material, such as a mica sheet, or may be made of a ceramic material, or may be made of a glass fiber ceramic composite material, and so on by those skilled in the art. Such adjustments and modifications to the specific materials of the insulating shell 33 do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Preferably, the insulating shell is made of the mica material.
It should be noted that in practical applications, the insulating shell 33 may be fixed inside the housing 1 by fasteners, or may be clamped into the housing 1, and so on by those skilled in the art. Such adjustments and modifications to the specific fixation of the insulating shell 33 inside the housing 1 do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Preferably, as shown in Figs. 4 to 6, a plurality of clip-on limiting ribs 13 are disposed inside the housing 1 of the present invention, to clamp the insulating shell 33 into the housing 1.
By disposing the plurality of clip-on limiting ribs 13 inside the housing 1, on the one hand, it is convenient to clamp the insulating shell 33 into the housing 1. Compared with the configuration where the insulating shell 33 is fixed inside the housing 1 by fasteners, clamping the insulating shell 33 into the housing 1 can reduce using the fasteners, thereby reducing components of the drying air duct assembly, and meanwhile, improving the installation efficiency of the insulating shell 33. On the other hand, by disposing the plurality of clip-on limiting ribs 13, more airflow introduced into the housing 1 through the blower 2 can enter the heating air duct 30, thereby increasing the amount of the hot air output from the air outlet 102, and further improving the drying efficiency.
It should be noted that in practical applications, the number of the clip-on limiting ribs 13 is not limited to being a plurality. For example, two clip-on limiting ribs 13 may also be disposed, and so on. Such adjustments and modifications to the specific number of the clip-on limiting ribs 13 do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention. Definitely and preferably, the plurality of clip-on limiting ribs 13 are provided.
It should also be noted that in practical applications, the temperature control member 7 may be provided as an over-temperature protection switch by those skilled in the art, where the over-temperature protection switch is connected in series with the heating body. The over-temperature protection switch 7 is configured to open the loop in a case where the temperature within the heating air duct 30 exceeds a first set temperature, and further configured to close the loop in a case where the temperature within the heating air duct 30 is lower than the first set temperature. Alternatively, the temperature control member 7 may be disposed only as an over-temperature fuse switch, where the over-temperature fuse switch is configured to open the loop in a case where the temperature within the heating air duct 30 exceeds a second set temperature. Alternatively, the temperature control member 7 may be provided as both an over-temperature protection switch 71 and an over-temperature fuse switch 72, where the over-temperature protection switch 71 and the over-temperature fuse switch 72 both are connected in series with the heating body, and so on. Such adjustments and modifications to the specific configuration of the temperature control member 7 do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Preferably, as shown in Fig. 3, the temperature control member 7 of the present invention includes the first over-temperature protection switch 71 and the second over-temperature protection switch 72. The first over-temperature protection switch 71 and the second over-temperature protection switch 72 both are connected in series with the heating body. The first over-temperature protection switch 71 is configured to open the loop in a case where the temperature within the heating air duct 30 exceeds the first set temperature, and further configured to close the loop in a case where the temperature within the heating air duct 30 is lower than the first set temperature. The second over-temperature protection switch 72 is configured to open the loop in a case where the temperature within the heating air duct 30 exceeds the second set temperature, and further configured to close the loop in a case where the temperature within the heating air duct 30 is lower than the second set temperature. The first set temperature is lower than the second set temperature.
With such a configuration, on the one hand, by disposing the first over-temperature protection switch 71, the temperature of the hot air inside the heating air duct 30 can be detected more accurately, the loop can be opened when the temperature of the hot air inside the heating air duct 30 is over high, preventing the superconducting heating wire 31 from being continuously heated, thereby avoiding continuous temperature rise in the heating air duct and deviation from the set temperature. At the same time, the loop can be closed when the temperature of the hot air inside the heating air duct 30 is lower than the set temperature, enabling the superconducting heating wire 31 to be continuously heated and raising the temperature within the heating air duct 30 rise to reach the set temperature, thereby more accurately controlling the temperature of the hot air inside the heating air duct 30. On the other hand, by disposing the second over-temperature protection switch 72, in a case where the first over-temperature protection switch 71 fails, and when it is detected that the temperature within the heating air duct 30 continuously rises and exceeds the second set temperature, the loop can be opened by melting, preventing the superconducting heating wire 31 from being continuously heated and burning up the housing 1, thereby avoiding scald or fire, achieving a double over-temperature protection for the drying air duct, and improving the use safety of the laundry treatment device.
It should be noted that in practical applications, the temperature control member 7 may be disposed at the inlet end 301 of the hot air channel 30, or may be disposed at the middle of the hot air channel 30, or may be disposed at the outlet end 302 of the hot air channel 30, and so on by those skilled in the art. Such adjustments and modifications to the specific placement of the temperature control member 7 do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Preferably, the temperature control member 7 is disposed at the middle of the hot air channel 30.
It should be noted that one end of the superconducting heating wire 31 is connected with a power cord 6, and the other end of the superconducting heating wire 31 is wound around the supporting skeleton 32 and then connected in series with the first over-temperature protection switch 71 and the second over-temperature protection switch 72 via the power cord 6. The power cord 6 passes through the housing 1 and is then connected with anode and cathode of an external power supply to form a closed loop. The superconducting heating wire 31 generates heat upon energization and heats the airflow inside the heating air duct 30. The first over-temperature protection switch 71 and the second over-temperature protection switch 72 detect temperatures inside the heating air duct 30 independently.
It should also be noted that in practical applications, the first over-temperature protection switch 71 and the second over-temperature protection switch 72 may be directly disposed inside the heating air duct 30 via the power cord 6, or may be disposed on the supporting skeleton 32, and so on by those skilled in the art. Such adjustments and modifications to the specific placement of the first over-temperature protection switch 71 and the second over-temperature protection switch 72 do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
It should also be noted that in practical applications, the temperature control member 7 may be disposed fixedly relative to the supporting skeleton 32, or may be slidably connected with the supporting skeleton 32 so as to move the temperature control member 7 out of the heating air duct 30 while repairing the temperature control member 7, and so on by those skilled in the art. Such adjustments and modifications to the specific installation of the temperature control member 7 on the supporting skeleton 32 do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Next, referring to Figs. 8 and 9, Fig. 8 is a structural schematic diagram of the heating member of the present invention; and Fig. 9 is a structural schematic diagram of the heating member, the temperature control member, a sliding plate and a driving mechanism of the present invention.
Preferably, as shown in Figs. 8 and 9, the drying air duct assembly of the present invention further includes a sliding plate 41 and a driving mechanism 42. The temperature control member 7 is installed on the sliding plate 41. The driving mechanism 42 is configured to be able to drive the sliding plate 41 to move relative to the supporting skeleton 32, so as to move the sliding plate 41 out of the heating air duct 30.
With such a configuration, on the one hand, the temperature control member 7 can be prevented from moving in the heating air duct 30 to affect the accuracy of the temperature control member 7, so that the hot air inside the heating air duct 30 can be detected more accurately; and on the other hand, when in normal use, the temperature control member 7 is installed on the sliding plate 41 and moves into the heating air duct 30 with the sliding plate 41, which facilitates the detection of the temperature within the heating air duct 30. When the temperature control member 7 needs to be repaired or replaced, the sliding plate can be driven to move relative to the supporting skeleton 32 by the driving mechanism 42, so as to move the sliding plate 41 out of the heating air duct 30, thereby facilitating the repair of the temperature control member 7, and improving the repairing efficiency.
It should be noted that in practical applications, the sliding plate 41 may be disposed on one of the supporting plates and is slidably connected with the supporting plates, or may be disposed between two of the supporting plates and is slidably connected with the two supporting plates, and so on by those skilled in the art. Such adjustments and modifications to the specific placement of the sliding plate 41 on the supporting skeleton 32 do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Preferably, as shown in Fig. 8, the sliding plate 41 of the present invention is disposed between two of the supporting plates. Sliding blocks 411 are disposed at both sides of the sliding plate 41 respectively. Sliding slots 321 are formed in positions, corresponding to the sliding blocks 411, on the two supporting plates. The sliding blocks 411 slide along the sliding slots 321 so as to achieve a slidable connection between the sliding plate 41 and the supporting plate.
With such a configuration, the sliding plate 41 can smoothly slide on the supporting skeleton 32, which improves the installation stability of the sliding plate 41 on the supporting skeleton 32.
It should be noted that in practical applications, it is not limited to the configuration where the sliding blocks 411 is disposed on the sliding plate 41 and the sliding slots 321 are formed in the supporting skeleton 32 to achieve the slidable connection between the sliding plate 41 and the supporting skeleton 32. For example, the sliding blocks 411may be disposed on the supporting skeleton 32 and the sliding slots 321 may be formed in the sliding plate 41 to achieve the slidable connection between the sliding plate 41 and the supporting skeleton 32 by sliding the sliding blocks 411 inside the sliding slots 321, and so on. Such flexible adjustments and modifications do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention. Definitely and preferably, the sliding blocks 411 is disposed on the sliding plate 41 and the sliding slots 321 are formed in the supporting skeleton 32 to achieve the slidable connection between the sliding plate 41 and the supporting skeleton 32.
It should also be noted that in practical applications, the driving mechanism 42 may be provided as a motor, or may be provided as an electromagnetic member by those skilled in the art, where the sliding plate 41 is magnetic, and when energized, the electromagnetic member can generate a magnetic attraction force on the sliding plate 41 so as to force the sliding plate 41 to move out of the heating air duct 30, and so on. Such adjustments and modifications to the specific configuration of the driving mechanism 42 do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Preferably, as shown in Fig. 9, the driving mechanism 42 of the present invention includes an electromagnetic member 421. The sliding plate 41 is magnetic. When energized, the electromagnetic member 421 can generate a magnetic attraction force on the sliding plate 41 so as to force the sliding plate 41 to move out of the heating air duct 30. The driving mechanism 42 further includes an elastic reset member 422, which enables the sliding plate 41 to move back into the heating air duct 30 after the electromagnetic member 421 is deenergized.
With such a configuration, compared with the configuration where the driving mechanism 42 is provided as the motor, disposing the driving mechanism 42 as the electromagnetic member 421 can avoid using the motor, thereby reducing the cost of the driving mechanism 42, and further reducing the cost of the drying air duct assembly. At the same time, the structure of the driving mechanism 42 can be simpler, and the simplicity of the drying air duct assembly 7 is improved.
It should be noted that in practical applications, the elastic reset member 422 may be provided as a spring, or may be provided as an elastic rope, and so on by those skilled in the art. Such adjustments and modifications to the specific configuration of the elastic reset member 422 do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Preferably, the elastic reset member 422 is provided as a spring.
It should be noted that in practical applications, the sliding plate 41 may be made of a magnetic material, or a magnetic element may also be disposed on one side, corresponding to the electromagnetic member 421, of the sliding plate 41, and so on by those skilled in the art. Such flexible adjustments and modifications do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Preferably, a magnetic element is disposed on one side, corresponding to the electromagnetic member 421, of the sliding plate 41.
Preferably, as shown in Fig. 9, the drying air duct assembly of the present invention further includes a first cord take-up member 431 and a second cord take-up member 432. The first cord take-up member 431 and the second cord take-up member 432 are positioned at two ends of the temperature control member 7 respectively. In a case where the sliding plate 41 moves out of the heating air duct 30, the power cord 6 inside the first cord take-up member 431 is released, so that the sliding plate 41 moves towards the second cord take-up member 432, and the power cord 6 between the sliding plate 41 and the second cord take-up member 432 is retracted into the first cord take-up member 431. In a case where the sliding plate 41 moves back into the heating air duct 30, the power cord 6 inside the second cord take-up member 432 is released, so that the sliding plate 41 moves towards the first cord take-up member 431, and the power cord 6 between the sliding plate 41 and the first cord take-up member 431 is retracted into the first cord take-up member 431.
With such a configuration, the power cord 6 can be retracted into the first cord take-up member 431 or the second cord take-up member 432 when the sliding plate 41 moves out of or back into the heating air duct 30, preventing the power cord 6 from being accumulated and entangled, and further facilitating the repair of the temperature control member 7.
It should be noted that in practical applications, the first cord take-up member 431 and the second cord take-up member 432 may be provided as automatic cord take-up reels, or may be provided as automatic cord take-up units, and so on by those skilled in the art. Such adjustments and modifications to the specific configuration of the first cord take-up member 431 and the second cord take-up member 432 do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Preferably, the first cord take-up member 431 and the second cord take-up member 432 both are provided as automatic cord take-up units.
The specific structure of the automatic cord take-up unit of the present invention will be described by taking the first cord take-up member 431 as an example below in connection with Fig. 10.
Preferably, as shown in Fig. 10, the first cord take-up member 431 includes a cord take-up body 4311, a cord take-up spool 4312 and a torsion spring 4313. The cord take-up spool 4312 is installed on the cord take-up body 4311 and rotatably connected with the cord take-up body 4311. The torsion spring 4313 is sleeved outside the cord take-up spool 4312. One end of the torsion spring 4313 is fixed on the cord take-up spool 4312, and the other end of the torsion spring 4313 is fixed on the cord take-up body 4311. A first limiting portion 43121 and a second limiting portion 43122 are disposed on the cord take-up spool 4312. The power cord 6 is wound between the first limiting portion 43121 and the second limiting portion 43122 of the cord take-up spool 4312.
When the drying air duct assembly is in normal use, the sliding plate 41 is positioned inside the heating air duct 30. In this case, the torsion spring on the first cord take-up member 431 is in a loosened state, and the torsion spring on the second cord take-up member 432 is in a tensioned state. When the temperature detection member 7 needs to be repaired, as the driving mechanism 42 drives the sliding plate 41 to move towards the second cord take-up member 432, the power cord 6 on the first cord take-up member 431 is released. Accordingly, the torsion spring of the first cord take-up member 431 gradually changes from the loosened state to the tensioned state, the torsion spring of the second cord take-up member 432 gradually changes from the tensioned state to the loosened state, and the power cord 6 between the sliding plate 41 and the second cord take-up member 432 is retracted into the second cord take-up member 432.
When the repair of the temperature detecting member 7 is completed, the driving mechanism 42 drives the sliding plate 41 to move towards the first cord take-up member 431, and the power cord 6 on the second cord take-up member 432 is released. Accordingly, the torsion spring of the second cord take-up member 432 changes from the loosened state to the tensioned state. With the movement of the sliding plate 41, the power cord 6 between the first cord take-up member 431 and the sliding plate 41 is retracted into the first cord take-up member 431. Accordingly, the torsion spring of the first cord take-up member 432 changes from the tensioned state to the loosened state. During the whole process, the power cord 6 does not loosen, preventing from entanglement, and improving the maintenance efficiency.
Next, referring to Fig. 7, Fig. 7 is a partially enlarged schematic diagram at C in Fig. 3.
Preferably, as shown in Fig. 7, the drying air duct assembly of the present invention further includes a backdraft prevention member 5 disposed at the air outlet 102. The backdraft prevention member 5 is configured to be able to open the air outlet 102, to allow the airflow inside the heating air duct 30 to flow out from the air outlet 102. The backdraft prevention member 5 is further configured to be able to close the air outlet 102, to prevent foreign matters outside the housing 1 from entering the housing 1 through the air outlet 102.
With such a configuration, on the one hand, the laundry foams or clothes flocks in the laundry treatment device can be prevented from entering the drying air duct assembly through the air outlet 102 when the drying air duct assembly is not in operation, thereby avoiding the blockage of the drying air duct assembly; and on the other hand, the air outlet 102 can be opened to allow the airflow inside the heating air duct 30 to flow out from the air outlet 102 when the drying air duct assembly is in operation, facilitating the delivery of the hot air, thereby avoiding affecting the normal use of the drying air duct assembly.
It should be noted that in practical applications, by those skilled in the part, the backdraft prevention member 5 may be provided as motors and valve plates, where the air outlet 102 can be closed when the drying air duct assembly is not in operation, and the motors drive the valve plates to move relative to the housing 1 so as to open the air outlet 102 when the drying air duct assembly is in operation. Alternatively, the backdraft prevention member 5 may be provided as a backdraft prevention valve, where the backdraft prevention valve is pivotally connected with the housing 1. The backdraft prevention valve abuts against the housing 1 to close the air outlet 102 when the drying air duct assembly is not in operation, and can be pushed by the airflow inside the housing 1 to rotate relative to the housing 1 and make the air outlet 102 opened when the drying air duct assembly is in operation, thereby facilitating the delivery of the hot air, and so on. Such adjustments and modifications to the specific configuration of the backdraft prevention member 5 do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Preferably, as shown in Fig. 5, the backdraft prevention member 5 of the present invention includes a plurality of sealing substrates 51 and a plurality of valve plates 52. The plurality of sealing substrates 51 and the plurality of the valve plates 52 are sequentially distributed at intervals. The sealing substrates 51 are installed on the housing 1 to divide the air outlet 102 into a plurality of air outlet channels. The valve plates 52 are pivotally connected with the housing 1 via a rotating shaft 53. The valve plates 52 are configured to abut against the sealing substrates 51 to close the air outlet channels when they are in a first working state, and move away from the sealing substrates 51 to open the air outlet channels when they are in a second working state.
With such a configuration, on the one hand, compared with the configuration where the backdraft prevention member 5 is provided as the motors and valve plates, disposing the backdraft prevention member 5 as the sealing substrates 51 and valve plates 52 can avoid using the motor, thereby reducing the cost of the backdraft prevention member 5, and further reducing the cost of the drying air duct assembly. At the same time, the structure of the drying air duct assembly can be simpler and lighter. On the other hand, by disposing the plurality of sealing substrates 51 and the plurality of valve plates 52, the hot air blown out of the air outlet 102 can be divided into a plurality of airflows, so that the hot air can be blown into the drying chamber of the laundry treatment device more evenly, improving the drying effect.
It should be noted that in practical applications, it is not limited to the configuration where the plurality of the sealing substrates 51 and the plurality of the valve plates 52 are disposed. For example, two sealing substrates 51 may be disposed, and accordingly, one valve plate 52 may be disposed, and the two sealing substrates 51 are positioned at both sides of the valve plate 52. Alternatively, three sealing substrates 51 may be disposed, and accordingly, two valve plates 52 may be disposed, and the sealing substrates 51 and the valve plates 52 are sequentially distributed at intervals, and so on. Such adjustments and modifications to the specific numbers of the sealing substrates 51 and the valve plate 52 do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention. Definitely and preferably, the plurality of the sealing substrates 51 and the plurality of the valve plates 52 are disposed.
It should also be noted that in practical applications, by those skilled in the art, the sealing substrates 51 may be made of materials with sealing effects, such as rubber materials. Alternatively, sealing gaskets may be disposed on the sealing substrates 51, so that a sealing between the valve plate 52 and the sealing substrates 51 can be realized when the valve plate 52 abuts against the sealing substrates 51, and so on. Such flexible adjustments and modifications do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Preferably, the sealing substrates 51 are made of the rubber materials.
It should be noted that in practical applications, by those skilled in the art, a fixing structure may be disposed on the drying air duct assembly, enabling the drying air duct assembly to be installed on the laundry treatment device by the fixing structure. Alternatively, a clip-on structure may be disposed on the drying air duct assembly, enabling the drying air duct assembly to be installed on the laundry treatment device through clamping the drying air duct assembly to the laundry treatment device by the clip-on structure, and so on. Such adjustments and modifications to the specific installation of the drying air duct assembly on the laundry treatment device do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Preferably, the drying air duct assembly of the present invention further includes a fixing structure disposed on the housing 1. The drying air duct assembly is installed on the laundry treatment device by the fixing structure.
With such a configuration, it is convenient to install and disassemble the drying air duct assembly on the laundry treatment device, and meanwhile, the installation firmness of the drying air duct assembly on the laundry treatment device can be improved.
It should be noted that in practical applications, by those skilled in the art, the fixing structure may be provided as a connecting lug, enabling the drying air duct assembly to be installed on the laundry treatment device by passing a bolt through a threaded hole in the connecting lug. Alternatively, the fixing structure may also be provided as a fixing post, enabling the drying air duct assembly to be installed on the laundry treatment device by passing a bolt through a threaded hole in the fixing post, and so on. Such flexible adjustments and modifications do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Exemplarily, as shown in Figs. 1 to 3, 5 and 6, the fixing structure of the present invention is a fixing post 16. A bolt hole 161 is provided inside the fixing post 16. The fixing post 16 is used to install the drying air duct assembly on the laundry treatment device.
It should be noted that in practical applications, by those skilled in the art, the laundry treatment device may be provided as a washer and dryer combo, or may be provided as a laundry dryer, or may be disposed a laundry care machine, and so on. Such adjustments and modifications to the specific configuration of the laundry treatment device do not deviate from the principle and scope of the present invention, and shall consequently fall within the protection scope of the present invention.
Exemplarily, the laundry treatment device is provided as a washer and dryer combo.
In summary, the technical solution of the present invention has been described in connection with the preferred implementations shown in the accompanying drawings, however, it is obvious for those skilled in the art that the protection scope of the present invention is not limited to these specific implementations. Without departing from the principle of the present invention, equivalent alterations or substitutions to relevant technical features can be made by those skilled in the art, and the technical solutions after such alterations or substitutions will all fall within the protection scope of the present invention.

Claims

A drying air duct assembly, comprising:
a housing, provided with an air inlet and an air outlet;

a blower, configured to be able to introduce an airflow outside the housing into the housing through the air inlet;

a heating member, disposed inside the housing and positioned between the air inlet and the air outlet, wherein the heating member is provided with a heating air duct, an inlet end of the heating air duct is communicated with the air inlet such that the airflow entering the housing through the air inlet flows into the heating air duct, the heating member comprises a heating body which is capable of heating the airflow flowing through the heating air duct, and an outlet end of the heating air duct is communicated with the air outlet such that hot airflow inside the heating air duct flows out of the air outlet; and

a temperature control member, disposed inside the heating air duct, wherein the temperature control member is connected in series with the heating body of the heating member to form a closed loop, and the temperature control member is used to detect temperature within the heating air duct, and open the loop in a case where the temperature within the heating air duct is greater than a set temperature.
The drying air duct assembly according to claim 1, wherein the temperature control member comprises a first over-temperature protection switch connected in series with the heating body, the first over-temperature protection switch is configured to open the loop in a case where the temperature within the heating air duct exceeds a first set temperature, and close the loop in a case where the temperature within the heating air duct is lower than the first set temperature.
The drying air duct assembly according to claim 2, wherein the temperature control member further comprises a second over-temperature protection switch, the second over-temperature protection switch and the first over-temperature protection switch are both connected in series with the heating body, and the second over-temperature protection switch is configured to open the loop in a case where the temperature within the heating air duct exceeds a second set temperature, and not to close the loop in a case where the temperature within the heating air duct is lower than the second set temperature, wherein the first set temperature is lower than the second set temperature.
The drying air duct assembly according to claim 1, wherein the heating member further comprises a supporting skeleton and an insulating shell, the supporting skeleton and the heating body are both disposed inside the insulating shell, the heating air duct is formed inside the insulating shell, and the heating body is a superconducting heating wire which is wound around the exterior of the supporting skeleton.
The drying air duct assembly according to claim 4, further comprising a sliding plate and a driving mechanism, wherein the temperature control member is installed on the sliding plate, and the driving mechanism is configured to be able to drive the sliding plate to move relative to the supporting skeleton, so as to move the sliding plate out of the heating air duct.
The drying air duct assembly according to claim 5, wherein the driving mechanism comprises an electromagnetic member, the sliding plate is magnetic, the electromagnetic member, when energized, generates a magnetic attraction force on the sliding plate to force the sliding plate to move out of the heating air duct, and the driving mechanism further comprises an elastic reset member which enables the sliding plate to move back into the heating air duct after the electromagnetic member is deenergized.
The drying air duct assembly according to claim 5, further comprising a first cord take-up member and a second cord take-up member which are respectively positioned at two ends of the temperature control member, wherein in a case where the sliding plate moves out of the heating air duct, the power cord inside the first cord take-up member is released, enabling the sliding plate to move towards the second cord take-up member, and the power cord between the sliding plate and the second cord take-up member to be retracted into the second cord take-up member, and in a case where the sliding plate moves back into the heating air duct, the power cord inside the second cord take-up member is released, enabling the sliding plate to move towards the first cord take-up member, and the power cord between the sliding plate and the first cord take-up member to be retracted into the first cord take-up member.
The drying air duct assembly according to any of claims 1 to 7, further comprising a backdraft prevention member disposed at the air outlet, wherein the backdraft prevention member is configured to be able to open the air outlet to allow the airflow inside the heating air duct to flow out from the air outlet, and close the air outlet to prevent foreign matters outside the housing from entering the housing through the air outlet.
The drying air duct assembly according to claim 8, wherein the backdraft prevention member comprises a plurality of sealing substrates and a plurality of valve plates, the plurality of sealing substrates and the plurality of valve plates are sequentially distributed at intervals, the sealing substrates are installed on the housing to divide the air outlet into a plurality of air outlet channels, and the valve plates are pivotally connected with the housing and are configured to be able to abut against the sealing substrates to close the air outlet channels when the valve plates are in a first working state, and move away from the sealing substrates to open the air outlet channels when the valve plates are in a second working state.
A laundry treatment device, comprising the drying air duct assembly according to any one of claims 1 to 9.