Centrifugal wind wheel, centrifugal air suction structure, handheld iron

Abstract

The utility model discloses a centrifugal wind wheel, centrifugal air suction structure, handheld ironing ware belongs to clothes ironing equipment, and the air suction device of existing handheld ironing ware is difficult to take into account big suction and low noise, the utility model discloses the axial extension of centrifugal wind wheel's blade and form the smooth top edge away from the circular base plate, and the distance of smooth top edge and circular base plate gradually becomes small with the extension of smooth top edge from its radial inner end to radial outer end. When the airflow flows between the blades radially, the contact surface with the blades gradually becomes small, thereby reducing the noise, and under the premise of maintaining appropriate suction, the noise is reduced, thereby taking into account appropriate suction and low noise. The utility model also makes the blade of centrifugal wind wheel face the air inlet, and the smooth top edge of centrifugal wind wheel and the inner wall of flow guide cavity keep a gap of 0.5-1mm in the radial overlapping part, which not only ensures the flexible rotation of the wind wheel, but also reduces the air leakage of the gap, is favorable for reducing the noise and ensuring the airflow pressure.

Description

Technical Field

[0001] This utility model relates to clothing ironing equipment, specifically to a centrifugal impeller, a centrifugal suction structure, and a handheld iron, which can adsorb clothing onto the work surface when in operation. Background Technology

[0002] When using a handheld iron to iron clothes that need to be hung up, the released steam can blow the clothes away, resulting in poor ironing results. To overcome this drawback, a centrifugal suction structure should be used to draw the steam into the work surface during ironing, ensuring that the steam is fully applied to the clothes and guaranteeing ironing results. However, existing suction devices in handheld irons often struggle to balance adequate suction power with low noise. Utility Model Content

[0003] This utility model addresses the shortcomings of existing handheld irons in that their suction devices cannot achieve both high suction power and low noise. It provides a centrifugal impeller, centrifugal suction structure, and handheld iron that balances appropriate suction power and low noise.

[0004] To achieve the above objectives, the centrifugal impeller of this utility model includes an integral circular base plate, a shaft mounting part, and several blades. The shaft mounting part extends axially from the center of the circular base plate to one side of the circular base plate. The several blades are located on the same side of the circular base plate as the shaft mounting part and are radially distributed with the shaft mounting part as the center. The blades extend axially and form a smooth top edge away from the circular base plate. The distance between the smooth top edge and the circular base plate gradually decreases as the smooth top edge extends from its radial inner end to its radial outer end. The head housing is also provided with a foreign matter receiving part located between the working surface and the air inlet.

[0005] This centrifugal impeller generates centrifugal force when it rotates, which discharges the airflow attracted along the impeller axis radially towards the impeller. As the distance between the smooth top edge of the blade and the circular base plate gradually decreases as the smooth top edge extends from its radial inner end to its radial outer end, the contact area between the airflow and the blade gradually decreases when the airflow flows radially between the blades, thereby reducing noise. Under the premise of maintaining appropriate suction, noise is reduced, thus achieving a balance between appropriate suction and low noise.

[0006] The centrifugal impeller has a foreign object containment section that can hold and store debris such as hair that is sucked in with the airflow.

[0007] Preferably, the radial outer edge of the blades is flush with the edge of the circular substrate, placing them on the same cylindrical surface. As the airflow flows radially between the blades, it increases the path through which the blades exert a centrifugal pushing effect on the airflow, thereby ensuring suction.

[0008] Preferably, the radial inner end of the blade is a bevel, and the distance between the bevel and the circular base plate gradually decreases as the bevel extends towards the shaft mounting portion. Accordingly, a large forward-opening suction area can be formed in the central region of the impeller, which is conducive to rapid air intake and avoids the airflow being stirred by the blades in this area, thus preventing turbulence and increased noise.

[0009] Preferably, the shaft mounting portion is a smoothly transitioned boss shape, and the diameter of the boss gradually decreases as the boss moves away from the circular base plate along the axial direction. When airflow is drawn into the impeller along the axial direction, it can be guided by the shaft mounting portion to naturally change direction radially, reducing noise.

[0010] Preferably, the radial inner end of the blade and the shaft mounting portion form a central flow-dividing region. When airflow is drawn into the impeller along the axial direction, it can be concentrated and converged in the central flow-dividing region, which facilitates uniform radial flow division and reduces noise.

[0011] Preferably, the axial height of the shaft mounting portion is less than the axial height of the blade. This prevents the shaft mounting portion from occupying airflow space, allowing for smoother airflow.

[0012] Preferably, the number of blades is odd. This avoids resonance caused by the blades exerting centrifugal force on the airflow, which would increase noise.

[0013] The centrifugal suction structure of this utility model includes: A flow guide cavity equipped with an air inlet and an air outlet; This invention relates to a centrifugal impeller. The centrifugal impeller is located in a guide cavity and connected to a motor drive. The centrifugal impeller is coaxially arranged with the air inlet, the diameter of which is smaller than the diameter of the centrifugal impeller. The blades of the centrifugal impeller face the air inlet, and the smooth top edge of the centrifugal impeller maintains a 0.5-1mm gap with the inner wall of the guide cavity at the radial overlap point. This gap ensures that the impeller does not contact the inner wall of the guide cavity during rotation, allowing for flexible rotation, and also reduces air leakage, thus reducing noise and ensuring airflow pressure.

[0014] In one embodiment, the air outlet is located in the guide cavity at a position corresponding to the radial direction of the centrifugal impeller. This allows air to exit directly radially from the guide cavity, shortening the air outlet path and reducing air outlet noise.

[0015] Preferably, the inner wall of the guide cavity forms a guide surface located on the radial periphery of the centrifugal impeller, which guides the airflow from the air inlet axially away from the air inlet. Accordingly, the position of the air outlet can be arranged as needed. For example, the air outlet can be axially offset from the centrifugal impeller.

[0016] Preferably, the flow guide cavity includes a housing located on the back side of the centrifugal impeller, and a portion of the motor is located in the housing. This allows the airflow passing through the motor to cool it.

[0017] Preferably, the portion of the motor located in the housing is equipped with a heat dissipation structure to enhance heat dissipation.

[0018] Preferably, the radially inner end of the smooth top edge protrudes towards the air inlet, and the inner wall of the air inlet smoothly transitions with the inner wall of the guide cavity to form a transition surface that matches the smooth top edge of the blade. This allows the airflow to be smoothly guided at this location, reducing noise.

[0019] Preferably, the cross-sectional area of ​​the air inlet is 600-1200 square millimeters, and the cross-sectional area of ​​the air outlet is 300-600 square millimeters. This is suitable for forming a large air volume and uniform suction.

[0020] This handheld iron includes a head shell with an exhaust vent. The front end of the head shell has a working surface with steam release holes and suction holes. Inside the head shell is a centrifugal suction structure, the air inlet of which is connected to the suction holes on the working surface, and the air outlet of which is connected to the exhaust vent of the head shell. Thus, when releasing steam for ironing, the centrifugal suction structure draws air to adhere the clothing to the working surface, achieving both appropriate suction power and low noise.

[0021] This invention first extends the blades of the centrifugal impeller axially to form a smooth top edge away from the circular base plate. The distance between the smooth top edge and the circular base plate gradually decreases as the smooth top edge extends from its radial inner end to its radial outer end. When the centrifugal impeller rotates, it generates centrifugal force, which discharges the airflow attracted along the impeller axial direction radially towards the impeller. As the airflow flows radially between the blades, the contact area with the blades gradually decreases, thereby reducing noise. By reducing noise while maintaining appropriate suction, this invention achieves a balance between suitable suction and low noise.

[0022] This invention also ensures that the blades of the centrifugal impeller face the air inlet, and that the smooth top edge of the centrifugal impeller maintains a gap of 0.5-1mm with the inner wall of the guide cavity at the radial overlap. This gap ensures that the impeller does not contact the inner wall of the guide cavity when rotating, allowing for flexible impeller rotation, and also reduces air leakage, which helps to reduce noise and ensure airflow pressure. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the centrifugal impeller of this utility model from one perspective; Figure 2 for Figure 2 A schematic diagram showing another perspective of the centrifugal fan. Figure 3 for Figure 1-2 A schematic diagram of the orthographic projection of the centrifugal impeller from a front-to-back perspective. Figure 4 for Figure 3 Sectional view along axis AA; Figure 5 This is a schematic diagram of the orthographic projection of one structure of the centrifugal suction structure of this utility model; Figure 6 for Figure 5 BB-direction sectional view; Figure 7 This is a schematic diagram of an alternative structure of the centrifugal suction structure of this utility model. Figure 8 for Figure 7 CC-direction sectional view; Figure 9 This is a cross-sectional view of the handheld iron of this utility model. Explanation of the labels in the diagram: 100 Head shell, 101 Foreign object receiving part; 200 working face, 201 steam release hole, 202 air suction hole; 300 steam generator; 400 centrifugal suction structure, 410 Centrifugal impeller, 411 Circular base plate, 4111 Edge of the circular base plate, 412 Shaft mounting part, 413 Blade, 4131 Smooth top edge, 4132 Radial outer edge, 4133 Bevel, H1 Distance between the smooth top edge and the circular base plate, H2 Distance between the bevel and the circular base plate, H3 Axial height of the shaft mounting part, H4 Axial height of the blade, D1 Diameter of the centrifugal impeller. 420 air guide cavity, 421 air inlet, 422 air outlet, 423 air guide surface, 424 receiving part, 425 transition surface, D2 diameter of air inlet. 430 motor, 440 gap, 450 Central distribution area, 451 First circle, 452 Second circle; 500 handles; 600 water pump; 700 water tank. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this utility model are intended to cover non-exclusive inclusion, such as a method or product that includes a series of technical features, not limited to those technical features explicitly listed, but also including other technical features that may be included in the method or product but not explicitly listed.

[0026] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings.

[0027] Figure 1-4 A centrifugal impeller is shown. The centrifugal impeller 410 includes a circular base plate 411 of integral structure, a shaft mounting portion 412, and a plurality of blades 413, i.e., the circular base plate 411, shaft mounting portion 412, and plurality of blades 413 are integrally formed, such as by injection molding. The shaft mounting portion 412 extends axially from the center of the circular base plate 411 towards one side of the circular base plate. The plurality of blades 413 are located on the same side of the circular base plate 411 as the shaft mounting portion 412 and are radially distributed with respect to the shaft mounting portion. Each blade is curved, and the blades 413 extend axially to form a smooth top edge 4131 away from the circular base plate 411. The distance between the smooth top edge 4131 and the circular base plate 411 gradually decreases as the smooth top edge extends from its radially inner end to its radially outer end. This distance between the smooth top edge 4131 and the circular base plate 411 reflects the height of the blade.

[0028] This centrifugal impeller generates centrifugal force when it rotates, which discharges the airflow attracted along the impeller axis radially towards the impeller. As the distance between the smooth top edge of the blade and the circular base plate gradually decreases as the smooth top edge extends from its radial inner end to its radial outer end, the contact area between the airflow and the blade gradually decreases when the airflow flows radially between the blades, thereby reducing noise. Under the premise of maintaining appropriate suction, noise is reduced, thus achieving a balance between appropriate suction and low noise.

[0029] The above structure embodies the basic concept of this utility model, enabling the realization of its technical solution. To further improve this technical solution, based on the above structure, the following preferred technical means can be selected to obtain better embodiments.

[0030] like Figure 1-2 As shown, the radial outer edge 4132 of the blade 413 is flush with the edge 4111 of the circular substrate, placing them on the same cylindrical surface. When the airflow flows radially between the blades, it increases the path through which the blades exert centrifugal pushing force on the airflow, thereby ensuring suction.

[0031] like Figure 1 , Figure 4As shown, the radially inner end of the blade 413 is a bevel 4133, and the distance between the bevel 4133 and the circular base plate 411 gradually decreases as the bevel extends towards the shaft mounting portion 412. The distance between the bevel 4133 and the circular base plate 411 reflects the height of the bevel. Accordingly, a large forward-opening suction area can be formed in the central region of the impeller, which is conducive to rapid air intake and avoids the airflow being stirred by the blades in this area, thus preventing turbulence and increased noise.

[0032] like Figure 1 , Figure 4 As shown, the shaft mounting portion 412 is a smoothly transitioned boss shape, and the diameter of the boss gradually decreases as the boss moves away from the circular base plate along the axial direction. When airflow is drawn into the impeller along the axial direction, it can be guided by the shaft mounting portion to naturally change direction radially, reducing noise.

[0033] like Figure 3 As shown, the radial inner end of the blade and the shaft mounting portion form a central flow-diverting region 450, which in turn... Figure 3 The center is defined within the first circle 451, indicated by the dotted line. Furthermore, the inclined edge 4133, which serves as the radial inner end of the blade, lies between the first circle 451 and the second circle 452. When the airflow is drawn into the impeller along the axial direction, it can be concentrated and converged in the central splitting region, facilitating uniform radial splitting and reducing noise.

[0034] like Figure 4 As shown, the axial height H3 of the shaft mounting section is less than the axial height H4 of the blade. This prevents the shaft mounting section from occupying the airflow space, allowing for smoother airflow.

[0035] like Figure 3 As shown, the number of blades 413 is an odd number. This is to avoid resonance and increased noise caused by the blades exerting centrifugal force on the airflow.

[0036] like Figure 5-6 , Figure 7-8 As shown, the centrifugal impeller 410 is assembled in the guide cavity 420 to form a centrifugal suction structure 400. Specifically, the centrifugal suction structure 400 includes a guide cavity 420 with an air inlet 421 and an air outlet 422, and a centrifugal impeller 410. The centrifugal impeller 410 is located in the guide cavity 420 and is driven by a motor 430. Typically, the shaft connection part 412 is connected to the motor shaft. The centrifugal impeller 410 is coaxially arranged with the air inlet 421. The diameter D2 of the air inlet is smaller than the diameter D1 of the centrifugal impeller. The blades 413 of the centrifugal impeller face the air inlet 421, and the smooth top edge 4131 of the centrifugal impeller and the inner wall of the guide cavity 420 maintain a gap 440 of 0.5-1mm at the radial overlap. This gap ensures that the impeller does not contact the inner wall of the guide cavity when rotating, allowing the impeller to rotate flexibly, and also reduces air leakage, which helps to reduce noise and ensure airflow pressure.

[0037] exist Figure 5-6 In this configuration, the air outlet 422 is located in the guide cavity 420 at a position corresponding to the radial direction of the centrifugal impeller 410. This allows air to exit directly radially from the guide cavity, shortening the air outlet path and reducing air outlet noise.

[0038] exist Figure 7-8 In the middle, the inner wall of the guide cavity 420 forms a guide surface 423 located on the radial periphery of the centrifugal impeller 410. The guide surface 423 directs the airflow from the air inlet 421 axially away from the air inlet. Figure 8 (As shown, pointing to the right). Based on this, the location of the air vents can be arranged as needed. For example... Figure 8 As shown, the air outlet 422 is offset axially from the centrifugal impeller 410.

[0039] like Figure 8 As shown, the flow guide cavity 420 includes a receiving portion 424 located on the back side of the centrifugal impeller 410, and a portion of the motor 430 is located in the receiving portion 424. Accordingly, the airflow passing through the motor cools the motor. The portion of the motor located in the receiving portion is equipped with a heat dissipation structure to enhance the heat dissipation effect.

[0040] like Figure 5-6 , Figure 7-8 As shown, the radially inner end of the smooth top edge 4131 protrudes towards the air inlet 421, and the inner wall of the air inlet 421 smoothly transitions with the inner wall of the guide cavity 420 to form a transition surface 425 that matches the smooth top edge 4131 of the blade. This allows the airflow to be smoothly guided at this location, reducing noise.

[0041] Furthermore, the cross-sectional area of ​​the air inlet 421 is 600-1200 square millimeters, and the cross-sectional area of ​​the air outlet 422 is 300-600 square millimeters. This is suitable for creating a large air volume and uniform suction.

[0042] like Figure 9 The handheld iron shown includes a head housing 100 with an exhaust vent, which is not shown in the figure, but is typically located on the left and right sides of the head housing. The front end of the head housing 100 has a working surface 200 with steam release holes 201 and suction holes 202 distributed thereon. A steam generator 300 is disposed inside the head housing 100. Figure 5-6 or Figure 7-8The centrifugal suction structure 400 shown has an air intake 421 in the guide cavity 420 connected to an air intake hole 202 on the working surface 200, and an air outlet 422 in the guide cavity 420 connected to an exhaust port on the head housing 100. The head housing 100 is connected to a handle 500, allowing the handheld iron to be operated. Water is pumped from the water tank 700 to the steam generator 300 via a water pump 600. The steam generator 300 heats and vaporizes the water into steam, which is released from the steam release hole 201 for ironing. Furthermore, when releasing steam for ironing, the motor 430 is activated, and the centrifugal suction structure 400 draws air to adhere the clothing to the working surface, ensuring the steam is fully applied to the clothing, guaranteeing ironing effectiveness, and balancing appropriate suction power with low noise.

[0043] Furthermore, the head housing 100 is also equipped with a foreign object receiving section 101 located between the working surface 200 and the air inlet 421, for accommodating and storing debris such as hair drawn in with the airflow. In particular, the foreign object receiving section 101 is detachable for cleaning the debris therein. Since the airflow needs to pass through the foreign object receiving section 101, and the foreign object receiving section 101 is used to accommodate and store debris drawn in with the airflow, the front end of the foreign object receiving section 101 can be open, and the rear end of the foreign object receiving section 101 can be provided with a channel for airflow, such as evenly distributed small holes or a mesh screen, to prevent foreign objects from entering the guide cavity.

Claims

1. A centrifugal impeller, comprising an integral circular base plate (411), a shaft mounting portion (412), and a plurality of blades (413), wherein the shaft mounting portion (412) extends axially from the center of the circular base plate (411) toward one side of the circular base plate, and the plurality of blades (413) are located on the same side of the circular base plate (411) as the shaft mounting portion (412) and are radially distributed with the shaft mounting portion as the center, characterized in that: The blade (413) extends axially and forms a smooth top edge (4131) away from the circular substrate (411). The distance (H1) between the smooth top edge (4131) and the circular substrate (411) gradually decreases as the smooth top edge extends from its radial inner end to its radial outer end.

2. The centrifugal impeller according to claim 1, characterized in that: the blades The radial outer edge (4132) is flush with the edge (4111) of the circular substrate so that they are located on the same cylindrical surface.

3. The centrifugal impeller according to claim 1, characterized in that: The inner radial end of the blade (413) is a bevel (4133), and the distance (H2) between the bevel (4133) and the circular base plate (411) gradually decreases as the bevel extends toward the shaft mounting part (412).

4. The centrifugal impeller according to claim 1, characterized in that: The shaft mounting part (412) is a boss-shaped part with a smooth transition, and the diameter of the boss gradually decreases as the boss moves away from the circular base plate (411) along the axial direction.

5. The centrifugal impeller according to claim 4, characterized in that: The radial inner end of the blade (413) and the shaft mounting part (412) form a central flow splitting area (450).

6. The centrifugal impeller according to claim 1, 4, or 5, characterized in that: The axial height (H3) of the shaft mounting part (412) is less than the axial height (H4) of the blade (413).

7. The centrifugal impeller according to claim 1, characterized in that: The number of blades (413) is odd.

8. Centrifugal suction structure, characterized by: include: A flow guide cavity (420) is configured with an air inlet (421) and an air outlet (422). The centrifugal impeller (410) according to any one of claims 1-7 is located in the flow guide cavity (420) and driven by the motor (430). The centrifugal impeller (410) is coaxially arranged with the air inlet (421). The diameter (D2) of the air inlet (421) is smaller than the diameter (D1) of the centrifugal impeller (410). The blades (413) of the centrifugal impeller face the air inlet (421), and the smooth top edge (4131) of the centrifugal impeller and the inner wall of the flow guide cavity maintain a gap of 0.5-1mm (440) at the radially overlapping part.

9. The centrifugal suction structure according to claim 8, characterized in that: The air outlet (422) is located in the radial part of the guide cavity (420) corresponding to the centrifugal impeller (410).

10. The centrifugal suction structure according to claim 8, characterized in that: The inner wall of the guide cavity (420) forms a guide surface (423) located on the radial periphery of the centrifugal impeller (410), and the guide surface (423) guides the airflow from the air inlet (421) axially away from the air inlet.

11. The centrifugal suction structure according to claim 10, characterized in that: The flow guide cavity (420) includes a receiving portion (424) located on the back side of the centrifugal impeller (410), and a portion of the motor (430) is located in the receiving portion (424).

12. The centrifugal suction structure according to claim 11, characterized in that: The portion of the motor (430) located in the housing (424) is equipped with a heat dissipation structure.

13. The centrifugal suction structure according to claim 10, characterized in that: The air outlet (422) is offset from the centrifugal impeller (410) along the axial direction.

14. The centrifugal suction structure according to any one of claims 8-13, characterized in that: The radial inner end of the smooth top edge (4131) protrudes toward the air inlet (421), and the inner wall of the air inlet (421) smoothly transitions with the inner wall of the guide cavity (420) to form a transition surface (425) that matches the smooth top edge (4131) of the blade.

15. The centrifugal suction structure according to any one of claims 8-13, characterized in that: The cross-sectional area of ​​the air inlet (421) is 600-1200 square millimeters, and the cross-sectional area of ​​the air outlet (422) is 300-600 square millimeters.

16. A handheld iron, comprising a head housing (100) with an exhaust vent, the front end of the head housing (100) having a working surface (200) with steam release holes (201) and suction holes (202) distributed thereon, characterized in that: The head housing (100) is provided with a centrifugal suction structure (400) as described in any one of claims 8-15. The air inlet (421) of the guide cavity is connected to the suction hole (202) on the working surface, and the air outlet (422) of the guide cavity is connected to the exhaust port of the head housing. The head housing (100) is also provided with a foreign matter receiving part (101) located between the working surface (200) and the air inlet (421).

Images