Laundry care machine and its plenum duct

Abstract

The application provides a clothes care machine and a pressurized air duct thereof. The pressurized air duct comprises an air inlet section and a pressurized section connected with each other. A first inner cavity of the air inlet section and a second inner cavity of the pressurized section are communicated to form an annular air duct. The pressurized section comprises a first wall plate, a first flow guide plate, a second wall plate and a second flow guide plate. A first end of the first wall plate is connected with a first end of the second wall plate. A fixed end of the first flow guide plate is connected with a second end of the first wall plate. A free end of the first flow guide plate is located on an outer side of the second end of the second wall plate away from the first wall plate. The first flow guide plate is curved outwardly towards the second inner cavity in an arc shape. A fixed end of the second flow guide plate is connected with the second end of the second wall plate. The second flow guide plate is curved in an arc shape, and the curved direction of the second flow guide plate is the same as that of the first flow guide plate. A gap for air supply is formed between the second flow guide plate and the free end of the first flow guide plate, and the gap is communicated with the second inner cavity. The pressurized air duct can ensure smooth air supply, and increase air supply speed and air supply amount.

Description

Technical Field

[0001] This invention relates to the field of garment care technology, and in particular to a garment care machine and its pressurized air duct. Background Technology

[0002] A garment care machine is a new generation of household appliances that uses steam, high temperature, ventilation, shaking, and drying to care for, sterilize, and deodorize clothes. A garment care machine includes one or more air circulation systems. Steam and hot air are blown out from the air outlets of the air circulation system, thereby caring for, ironing, sterilizing, and drying the clothes inside the drum.

[0003] To increase the airflow velocity from the outlet, a pressurized air supply duct is installed at the outlet of the air circulation system. One type of pressurized air supply duct includes an inlet section and a pressurized section connected to each other. The pressurized section includes an outer cover plate and an inner wall plate arranged radially along the air supply duct. The outer cover plate and the inner wall plate form an annular air duct with an airfoil-shaped axial cross-section. The outer cover plate has an air intake port communicating with the annular air duct. The inner wall plate includes an inlet ring and an outlet ring arranged axially along the air supply duct. An inlet gap is formed between the free ends of the inlet ring and the free ends of the outlet ring, and the airflow direction of the outlet gap is substantially perpendicular to the airflow direction of the inlet port. However, both the free ends of the air inlet ring and the air outlet ring are straight sections. That is, the side of the existing pressurized air supply duct that forms the pressurized air inlet slit is a straight surface. Since the airflow direction of the air outlet slit is basically perpendicular to the airflow direction of the air inlet, it is difficult to change the airflow direction of the air inlet so that the airflow can rotate 180° and blow out of the air inlet slit. This also obstructs the airflow that is about to be blown out of the air inlet slit, thereby weakening the speed and flow rate of the airflow, and thus affecting the speed, flow rate and smoothness of the airflow blown out of the air inlet slit. Summary of the Invention

[0004] To achieve the first objective of this invention, this invention provides a pressurized air duct that can ensure smooth air delivery, increase air delivery speed and air volume.

[0005] To achieve the second objective of the present invention, the present invention provides a garment care machine having the above-mentioned pressurized air duct.

[0006] To achieve the first objective of this invention, a pressurized air duct is provided, comprising an air inlet section and a pressurized section connected to each other. A first inner cavity of the air inlet section and a second inner cavity of the pressurized section are connected to form an annular air duct. The air inlet section has an air inlet communicating with the first inner cavity. The pressurized section includes a first wall plate, a first guide plate, a second wall plate, and a second guide plate. The first wall plate, the first guide plate, and the second wall plate form a second inner cavity, and the first wall plate and the second wall plate are arranged opposite each other radially in the annular air duct. The first end of the first wall plate... The first guide plate is connected to the first end of the second wall panel, the fixed end of the first guide plate is connected to the second end of the first wall panel, the free end of the first guide plate is located on the outer side of the second end of the second wall panel away from the first wall panel, and the first guide plate is curved outward in an arc towards the second inner cavity. The fixed end of the second guide plate is connected to the second end of the second wall panel, and the direction of the arc curvature of the second guide plate is the same as the direction of the arc curvature of the first guide plate. An air supply gap communicating with the second inner cavity is formed between the free ends of the second guide plate and the first guide plate.

[0007] As can be seen from the above scheme, the pressurization section of the pressurization duct of the present invention forms an air supply gap communicating with the second inner cavity between the free ends of the second guide plate and the first guide plate. The first wall plate, the first guide plate, and the second wall plate of the pressurization section form the second inner cavity. The airflow is blown out from the air supply gap from the second inner cavity of the pressurization section, causing the airflow to become thinner and the air pressure to increase, thereby increasing the air supply speed and air supply volume. At the same time, the first guide plate is curved outward in an arc shape toward the second inner cavity, and the direction of the arc curvature of the second guide plate is the same as the direction of the arc curvature of the first guide plate, so that the inner peripheral wall of the first guide plate... An arc-shaped, curved negative pressure suction area is formed between the outer peripheral wall of the first guide plate and the air supply gap near the air supply gap. Under the action of pressure difference, the arc-shaped, curved negative pressure suction area adsorbs the airflow in the second inner cavity and pressurizes and accelerates its ejection from the air supply gap. Simultaneously, the inner peripheral wall of the arc-shaped first guide plate and the outer peripheral wall of the second guide plate allow the airflow to flow tightly against the arc-shaped wall surface, which can guide and deflect the airflow without obstructing it. This allows the airflow to be smoothly pressurized and accelerated from the air supply gap without weakening its speed or flow rate, thus effectively increasing the air supply speed and volume. Therefore, the pressurized air duct of this invention can effectively increase the air supply speed and volume without increasing the centrifugal fan speed and power consumption of the drying device, or the electric heater power consumption of the drying device, thereby shortening the drying time and improving drying efficiency. Thus, the pressurized air duct of this invention can ensure smooth air supply, effectively increase the air supply speed and volume, and improve drying efficiency without increasing equipment operating costs.

[0008] A further option is to have the free end of the second guide plate located inside the second inner cavity.

[0009] A further design involves having a guiding tangent on the outer peripheral wall of the second guide plate in the radial direction of the annular duct, corresponding to the free end of the first guide plate, with the angle between the guiding tangent and the axial direction of the annular duct being between 0° and 45°.

[0010] A further approach is to set the angle between the guide tangent and the axis of the annular duct between 5° and 20°.

[0011] A further option is that the second wall panel is axially inclined relative to the annular air duct, and in the radial direction of the annular air duct, the distance between the first end of the second wall panel and the free end of the first guide plate is greater than the distance between the second end of the second wall panel and the free end of the first guide plate.

[0012] A further option is to have the angle of inclination between the second wall panel and the axial direction of the annular air duct be between 5° and 15°.

[0013] A further option is to position the second wall panel radially in the annular duct on the side of the first wall panel closest to the air inlet section.

[0014] A further embodiment is that the pressurization section also includes a third guide plate. The first end of the first wall plate is connected to the first end of the second wall plate through the third guide plate. The third guide plate includes an inclined section, which is inclined relative to the axial direction of the annular air duct. In the radial direction of the annular air duct, there is a first distance between the first end of the inclined section adjacent to the first wall plate and the free end of the first guide plate, and a second distance between the second end of the inclined section adjacent to the second wall plate and the free end of the first guide plate. The first distance is greater than the second distance in the radial direction of the annular air duct.

[0015] A further embodiment is that the third guide plate also includes an arc-shaped section, the two ends of which are connected to the first end of the first wall plate and the first end of the inclined section, respectively, and the arc-shaped section convexes outward toward the second inner cavity in an arc shape.

[0016] A further option is to have a minimum width of 0.5 mm to 5 mm for the air supply gap in the radial direction of the annular duct.

[0017] A further option is to have a minimum width of 0.8 mm to 1.4 mm for the air supply gap in the radial direction of the annular duct.

[0018] A further option is that the air inlet section has an air inlet at the first end of the annular air duct in the axial direction, and the first inner cavity gradually narrows from the first end of the air inlet section to the second end of the air inlet section in the axial direction of the annular air duct.

[0019] A further option is that the pressurized air duct also includes a connecting section, which is located at the first end of the air inlet section in the axial direction of the annular air duct, and the third inner cavity of the connecting section is connected to the first inner cavity. An air inlet connected to the third inner cavity is opened at the end of the connecting section away from the air inlet section.

[0020] A further proposed solution is to extend the third inner cavity in an arc shape toward the pressurization section.

[0021] To achieve the second objective of the present invention, the present invention provides a garment care machine, including a pressurized air duct, wherein the pressurized air duct is as described above. Attached Figure Description

[0022] Figure 1 This is a structural diagram of the garment care machine embodiment of the present invention after the outer shell is hidden.

[0023] Figure 2 This is a cross-sectional view of the garment care machine embodiment of the present invention after the outer shell is hidden.

[0024] Figure 3 This is a structural diagram showing the cooperation between the pressurized air duct and the door seal in an embodiment of the garment care machine of the present invention.

[0025] Figure 4 This is a cross-sectional view of the cooperation between the pressurized air duct and the door seal in an embodiment of the garment care machine of the present invention.

[0026] Figure 5 yes Figure 4 Enlarged view at point A.

[0027] Figure 6 This is a first-view structural diagram of the pressurized air duct in an embodiment of the garment care machine of the present invention.

[0028] Figure 7 This is a second-view structural diagram of the pressurized air duct in an embodiment of the garment care machine of the present invention.

[0029] Figure 8 This is a cross-sectional view of the pressurized air duct in an embodiment of the garment care machine of the present invention.

[0030] Figure 9 yes Figure 8 Enlarged view at point B.

[0031] Figure 10 This is a cross-sectional view of the pressurized air duct in an embodiment of the garment care machine of the present invention.

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0033] See Figure 1 and Figure 2In this embodiment, the garment care machine 1 is a washer-dryer combo. The garment care machine 1 includes a controller, a housing, an inner drum 11, a door seal 15, a drying device, and a pressurized air duct 16. The inner drum 11 is rotatably installed inside the housing. The door seal 15 is located at the front opening of the inner drum 11. The inner drum 11 has a storage cavity for accommodating the garments to be treated. The drying device includes a drying air duct, a centrifugal fan 14, and an electric heater 17. The drying air duct includes a front air duct 12 and a rear air duct 13 that are interconnected. The front air duct 12 is located at the top of the inner drum 11, and the rear air duct 13 is located at the rear of the inner drum 11. The centrifugal fan 14 is located between the front air duct 12 and the rear air duct 13. The pressurized air duct 16 is connected between the front air duct 12 and the door seal 15. An electric heater 17 is installed inside the front air duct 12 to heat the airflow within the drying duct. A front air duct temperature sensor 18 is also installed inside the front air duct 12 to detect the drying temperature inside the duct. This allows the controller to determine whether drying is complete based on the temperature difference within the front air duct 12, ensuring accurate drying and stopping the process as soon as the clothes are dry. A rear air duct temperature sensor 19 is also installed inside the rear air duct 13 to detect the airflow temperature inside the duct, thereby determining whether the centrifugal fan 14 and the electric heater 17 are operating normally.

[0034] During the drying process, the air from the inner drum 11 is introduced into the drying duct by the centrifugal fan 14. After being heated by the electric heater 17, the air is blown into the inner drum 11 through the front air duct 12 and the pressurized air duct 16. As the inner drum 11 rotates, it disperses the clothes. During this process, the dry hot air turns into humid hot water vapor, which is discharged from the air outlet of the inner drum 11 and enters the rear air duct 13. Some of the humid hot water vapor condenses into water and is discharged through the rear air duct 13. The humid hot air that does not condense into water is guided by the rear air duct 13 toward the centrifugal fan 14 and continues to circulate until the clothes are dry.

[0035] See Figures 3 to 10 In this embodiment, the pressurized air duct 16 includes a connecting section 161, an air inlet section 163, and a pressurized section 162. The air inlet section 163 and the pressurized section 162 are interconnected, and the first inner cavity 1631 of the air inlet section 163 and the second inner cavity 1621 of the pressurized section 162 are connected to form an annular air duct. The connecting section 161 is located at the first end of the air inlet section 163 along the axial direction 110 of the annular air duct, and the third inner cavity 1612 of the connecting section 161 is connected to the first inner cavity 1631 of the air inlet section 163. An air inlet 1611 connected to the third inner cavity 1612 is opened at the end of the connecting section 161 away from the air inlet section 163. The air inlet 1611 of the connecting section 161 is connected to the front air duct 12 of the drying air duct. The air inlet section 163 and the pressurized section 162 are embedded and pass through the door seal 15. To ensure the stability of the connection between the pressurized air duct 16 and the door seal 15, and to prevent hot air from leaking from the connection point, the pressurized air duct 16 and the door seal 15 are integrally formed in this embodiment.

[0036] In this embodiment, the air inlet section 163 of the pressurized air duct 16 has an air inlet 1632 that communicates with the first inner cavity 1631. The third inner cavity 1612 of the connecting section 161 is connected to the first inner cavity 1631 of the air inlet section 163 through the air inlet 1632. In this embodiment, the pressurized section 162 includes a first wall plate 1622, a first guide plate 1624, a second wall plate 1623, and a second guide plate 1625. The first wall plate 1622, the first guide plate 1624, and the second wall plate 1623 form a second inner cavity 1621. The first wall plate 1622 and the second wall plate 1623 are arranged opposite each other in the radial direction of the annular air duct, wherein the radial direction of the annular air duct is perpendicular to the axial direction 110 of the annular air duct. The first end of the first wall plate 1622 is connected to the first end of the second wall plate 1623. In this embodiment, the fixed end of the first guide plate 1624 is connected to the second end of the first wall plate 1622, and the free end of the first guide plate 1624 is located on the outer side of the second end of the second wall plate 1623 away from the first wall plate 1622. The first guide plate 1624 is curved outwards towards the second inner cavity 1621 in an arc shape. Furthermore, the fixed end of the second guide plate 1625 is connected to the second end of the second wall plate 1623, and the direction of the arc curvature of the second guide plate 1625 is the same as that of the first guide plate 1624. An air supply gap 1626 communicating with the second inner cavity 1621 is formed between the free ends of the second guide plate 1625 and the first guide plate 1624. Preferably, the minimum width of the air supply gap 1626 in the radial direction of the annular air duct is between 0.5 mm and 5 mm. More preferably, the minimum width of the air supply gap 1626 in the radial direction of the annular air duct is between 0.8 mm and 1.4 mm.

[0037] In this embodiment, the pressurizing section 162 of the pressurizing duct 16 forms an air supply gap 1626 communicating with the second inner cavity 1621 between the free ends of the second guide plate 1625 and the first guide plate 1624. The first wall plate 1622, the first guide plate 1624, and the second wall plate 1623 of the pressurizing section 162 form the second inner cavity 1621. The airflow is blown out from the second inner cavity 1621 of the pressurizing section 162 through the air supply gap 1626 and sent to the inner cylinder 11 of the garment care machine 1, causing the airflow to become thinner and the air pressure to increase, thereby increasing the air supply speed and air supply volume. At the same time, the first guide plate 1624 is curved outward toward the second inner cavity 1621 in an arc shape, and the direction of the arc curvature of the second guide plate 1625 is perpendicular to that of the first guide plate 1624. The arc-shaped bends are in the same direction, forming an arc-shaped negative pressure suction area between the inner peripheral wall of the first guide plate 1624 and the outer peripheral wall of the second guide plate 1625 near the air supply gap 1626. Under the action of pressure difference, the arc-shaped negative pressure suction area adsorbs the airflow in the second inner cavity 1621 and pressurizes and accelerates it out of the air supply gap 1626. At the same time, the arc-shaped inner peripheral wall of the first guide plate 1624 and the outer peripheral wall of the second guide plate 1625 allow the airflow to flow closely along the arc-shaped wall surface, which can guide the airflow and does not obstruct the airflow. This allows the airflow to be smoothly pressurized and accelerated out of the air supply gap 1626 without weakening the airflow speed and flow rate, thereby effectively increasing the air supply speed and air volume. Therefore, in this embodiment, the pressurized air duct 16 can effectively increase the air supply speed and volume without increasing the speed and power consumption of the centrifugal fan 14 of the drying device, or the power consumption of the electric heater 17 of the drying device, thereby shortening the drying time and improving the drying efficiency. Thus, in this embodiment, the pressurized air duct 16 can ensure smooth air supply and effectively increase the air supply speed and volume without increasing equipment operating costs, thereby improving drying efficiency.

[0038] In this embodiment, the free end of the second guide plate 1625 is located inside the second inner cavity 1621. Because the direction of the arc-shaped bend of the second guide plate 1625 is the same as that of the arc-shaped bend of the first guide plate 1624, part of the airflow in the second inner cavity 1621 of the pressurization section 162 is turned towards the first end of the first wall plate 1622 and flows back into the second inner cavity 1621 under the action of the inner peripheral wall of the second guide plate 1625. This can effectively push the airflow at the second end of the first wall plate 1622 in the second inner cavity 1621 to be pressurized and accelerated out of the air supply gap 1626 under the adsorption effect of the arc-shaped bend negative pressure suction area. Thus, the inner peripheral wall of the arc-shaped bend of the second guide plate 1625 can change the direction of part of the airflow in the second inner cavity 1621 so that it can provide thrust for the airflow at the second end of the first wall plate 1622 in the second inner cavity 1621, thereby increasing the air supply speed and air supply volume, and ensuring smooth air supply. Specifically, in this embodiment, in the radial direction of the annular air duct, the outer peripheral wall of the second guide plate 1625 has a guiding tangent at the position corresponding to the free end of the first guide plate 1624. The angle θ between this guiding tangent and the axial direction 110 of the annular air duct is between 0° and 45°, thereby ensuring smooth airflow. Preferably, in this embodiment, the angle θ between the guiding tangent of the outer peripheral wall of the second guide plate 1625 in the radial direction of the annular air duct and the position corresponding to the free end of the first guide plate 1624, and the axial direction 110 of the annular air duct, is between 5° and 20°.

[0039] Furthermore, in this embodiment, the second wall panel 1623 is inclined relative to the axial direction 110 of the annular air duct, and in the radial direction of the annular air duct, the distance between the first end of the second wall panel 1623 and the free end of the first guide plate 1624 is greater than the distance between the second end of the second wall panel 1623 and the free end of the first guide plate 1624. Specifically, in this embodiment, the inclination angle β between the second wall panel 1623 and the axial direction 110 of the annular air duct is between 5° and 15°. Preferably, in this embodiment, the second wall panel 1623 is located on the side of the first wall panel 1622 near the air inlet section 163 in the radial direction of the annular air duct. Due to the Coanda effect, the inner peripheral wall of the arc-shaped curved second guide plate 1625 changes part of the airflow direction in the second inner cavity 1621 and then flows back into the second inner cavity 1621 along the inner wall of the second wall panel 1623 towards the first end of the first wall panel 1622 to provide disturbance and boost, thereby increasing the air supply speed and air supply volume, and ensuring smooth air supply.

[0040] In addition, the pressurization section 162 in this embodiment also includes a third guide plate. The first end of the first wall plate 1622 is connected to the first end of the second wall plate 1623 through the third guide plate. The third guide plate includes an inclined section 1627 and an arc-shaped section 1628. The inclined section 1627 is inclined relative to the axial direction 110 of the annular air duct. In the radial direction of the annular air duct, there is a first distance between the first end of the inclined section 1627 adjacent to the first wall plate 1622 and the free end of the first guide plate 1624. There is a second distance between the second end of the inclined section 1627 adjacent to the second wall plate 1623 and the free end of the first guide plate 1624. The first distance is greater than the second distance in the radial direction of the annular air duct, so that the inclined section 1627 is inclined downward. The two ends of the arc-shaped section 1628 are connected to the first end of the first wall plate 1622 and the first end of the inclined section 1627, respectively. The arc-shaped section 1628 is curved outward toward the second inner cavity 1621 in an arc shape. The airflow that flows back into the second inner cavity 1621 from the first end of the first wall panel 1622 along the inner wall of the second wall panel 1623 flows to the arc-shaped section 1628 of the third guide plate along the inclined section 1627 of the third guide plate. Since the arc-shaped section 1628 is curved outward towards the second inner cavity 1621, the disturbed airflow in the second inner cavity 1621 located at the first end of the first wall panel 1622 is turned towards the second end of the first wall panel 1622 by the action of the inner peripheral wall of the arc-shaped section 1628. This further pushes the airflow located at the second end of the first wall panel 1622 in the second inner cavity 1621 to be pressurized and accelerated out of the air supply gap 1626 under the adsorption effect of the arc-shaped curved negative pressure suction area, thereby increasing the air supply speed and air supply volume, and ensuring smooth air supply.

[0041] Specifically, in this embodiment, the air inlet section 163 has an air inlet 1632 at its first end along the axial direction 110 of the annular air duct, and the first inner cavity 1631 gradually narrows from the first end to the second end of the air inlet section 163 along the axial direction 110 of the annular air duct. The airflow enters the second inner cavity 1621 from the gradually narrowing first inner cavity 1631 and then exits from the air supply gap 1626, causing the airflow to become thinner and thinner again, further increasing the airflow pressure, thereby further increasing the air supply speed and air supply volume. In addition, in this embodiment, the third inner cavity 1612 of the connecting section 161 extends in an arc shape towards the pressurization section 162, which can reduce the overall volume of the pressurization air duct 16.

[0042] The above embodiments are merely preferred examples of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles of the present invention in accordance with the claims of the present invention should be included in the scope of the present invention patent application.

Claims

1. A pressurized air duct, characterized in that, This includes interconnected air intake sections and pressurization sections; The first inner cavity of the air inlet section and the second inner cavity of the pressurization section are connected to form an annular air duct, and the air inlet section is provided with an air inlet that is connected to the first inner cavity; The pressurization section includes a first wall plate, a first guide plate, a second wall plate, and a second guide plate. The first wall plate, the first guide plate, and the second wall plate form a second inner cavity. The first wall plate and the second wall plate are arranged opposite each other in the radial direction of the annular air duct. The first end of the first wall plate is connected to the first end of the second wall plate. The fixed end of the first guide plate is connected to the second end of the first wall plate, the free end of the first guide plate is located on the outer side of the second end of the second wall plate away from the first wall plate, and the first guide plate is curved outward in an arc towards the second inner cavity; The fixed end of the second guide plate is connected to the second end of the second wall panel, and the direction of the arc bending of the second guide plate is the same as the direction of the arc bending of the first guide plate. An air supply gap communicating with the second inner cavity is formed between the free ends of the second guide plate and the first guide plate. The pressurization section also includes a third guide plate, and the first end of the first wall plate is connected to the first end of the second wall plate through the third guide plate; The third guide plate includes an inclined section, which is inclined relative to the axial direction of the annular air duct. In the radial direction of the annular air duct, there is a first distance between the first end of the inclined section adjacent to the first wall plate and the free end of the first guide plate, and a second distance between the second end of the inclined section adjacent to the second wall plate and the free end of the first guide plate. The first distance is greater than the second distance in the radial direction of the annular air duct. The third guide plate also includes an arc-shaped section, the two ends of which are respectively connected to the first end of the first wall plate and the first end of the inclined section, and the arc-shaped section convexes outward toward the second inner cavity in an arc shape; The air inlet section has an air inlet at its first end in the axial direction of the annular air duct, and the first inner cavity gradually narrows from the first end of the air inlet section to the second end of the air inlet section in the axial direction of the annular air duct.

2. The pressurized air duct according to claim 1, characterized in that: The free end of the second guide plate is located inside the second inner cavity.

3. The pressurized air duct according to claim 2, characterized in that: In the radial direction of the annular air duct, the outer peripheral wall of the second guide plate has a guide tangent at the position corresponding to the free end of the first guide plate, and the angle between the guide tangent and the axial direction of the annular air duct is between 0° and 45°.

4. The pressurized air duct according to claim 3, characterized in that: The angle between the guide tangent and the axis of the annular air duct is between 5° and 20°.

5. The pressurized air duct according to claim 1, characterized in that: The second wall panel is inclined relative to the axial direction of the annular air duct, and in the radial direction of the annular air duct, the distance between the first end of the second wall panel and the free end of the first guide plate is greater than the distance between the second end of the second wall panel and the free end of the first guide plate.

6. The pressurized air duct according to claim 5, characterized in that: The angle of inclination between the second wall panel and the axis of the annular air duct is between 5° and 15°.

7. The pressurized air duct according to claim 1, characterized in that: The second wall panel is located radially in the annular air duct on the side of the first wall panel closest to the air inlet section.

8. The pressurized air duct according to claim 1, characterized in that: In the radial direction of the annular air duct, the minimum width of the air supply gap is between 0.5 mm and 5 mm.

9. The pressurized air duct according to claim 8, characterized in that: In the radial direction of the annular air duct, the minimum width of the air supply gap is between 0.8 mm and 1.4 mm.

10. The pressurized air duct according to any one of claims 1 to 9, characterized in that: The pressurized air duct also includes a connecting section, which is located at the first end of the air inlet section in the axial direction of the annular air duct, and the third inner cavity of the connecting section is connected to the first inner cavity. An air inlet connected to the third inner cavity is opened at the end of the connecting section away from the air inlet section.

11. The pressurized air duct according to claim 10, characterized in that: The third inner cavity extends in an arc shape toward the pressurization section.

12. A garment care machine, including a pressurized air duct, characterized in that: The pressurized air duct is any one of the pressurized air ducts described in claims 1 to 11.

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