A glass washing machine

Abstract

The utility model provides a kind of glass cleaning machine, including suction nozzle assembly, water tank and suction host machine connected in turn, the center portion of the impeller cover of suction host machine is designed to be adapted with the outer contour of mixed flow impeller, form equal-interval's wrapped suction air duct, to avoid airflow "escape", form turbulent flow;The outer edge of center portion is arched to form annular arch portion towards axial direction, annular arch portion connects annular wall, annular arch portion corresponds the trailing edge of impeller, provide enough space for high-speed rotating flow, help to maintain airflow pressure stability in air duct, avoid the radiation noise generated by the pressure change caused by airflow uneven distribution in air duct, further, set up sound-absorbing cotton at air outlet, can effectively absorb vibration noise generated when impeller high-speed rotates;Play the effect of effective noise reduction.

Description

Technical Field

[0001] This utility model relates to the field of cleaning equipment, specifically to a glass cleaning machine. Background Technology

[0002] When cleaning glass surfaces, a cleaning liquid is typically sprayed onto the surface first, followed by cleaning with a cleaning device. Currently, a new type of glass cleaning machine has emerged to simultaneously remove the liquid from the glass surface during cleaning; however, existing glass cleaning machines suffer from significant noise levels.

[0003] The noise generated by a glass washing machine during operation mainly stems from the following factors: 1. Motor operating noise; 2. Radiated noise caused by pressure changes due to uneven airflow distribution in the duct during impeller rotation. Regarding the first point, designers can prioritize selecting low-noise motors, as this is the most economical and effective method for noise reduction. However, existing technologies have not yet effectively addressed the noise generated by the second point. Utility Model Content

[0004] Therefore, this utility model addresses the problem of radiated noise caused by pressure changes due to uneven airflow distribution in the air duct, as mentioned in the second point above. It provides a glass washing machine that achieves effective noise reduction through structural improvements to the impeller and its air duct.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows: A glass washing machine includes a suction nozzle assembly, a water tank, and a suction main unit connected in sequence. The suction nozzle assembly is connected to the water tank, and the negative pressure inlet of the suction main unit is connected to the water tank. The suction main unit includes a drive motor, an impeller assembly, and sound-absorbing cotton. The impeller assembly includes a bottom shell, a mixed-flow impeller, and an impeller cover. The impeller cover is fitted onto the bottom shell to form a receiving cavity. The mixed-flow impeller is assembled in the receiving cavity and connected to the drive shaft of the drive motor. The impeller cover includes a central portion, an annular arched portion that arches axially from the outer edge of the central portion, and an annular wall connecting the annular arched portion. The central portion corresponds to the blade assembly of the mixed-flow impeller and is adapted to the outer contour of the mixed-flow impeller. A negative pressure inlet is provided at the top center of the central portion. The annular wall is located on the radial outer periphery of the mixed-flow impeller and has an air outlet. The sound-absorbing cotton is disposed at the air outlet.

[0006] Furthermore, the cross-section of the annular arched portion is an arc-shaped arch.

[0007] Furthermore, the annular arched portion forms an arc-shaped transition with the central portion.

[0008] Furthermore, it also includes sound-absorbing cotton, which is installed at the air outlet.

[0009] Furthermore, the central part, the annular arched part, and the annular wall of the impeller cover are integrally connected structures.

[0010] Furthermore, the mixed-flow impeller is a nine-bladed mixed-flow impeller with nine blades.

[0011] Furthermore, the central portion is conical or trumpet-shaped.

[0012] Furthermore, the drive motor is fixed to the bottom shell.

[0013] Furthermore, the suction unit also has a handheld housing, and the drive motor and impeller assembly are assembled inside the handheld housing; the handheld housing is connected to the water tank.

[0014] The technical solution provided by this utility model has the following beneficial effects: A mixed-flow impeller is selected, and the center of the impeller cover is designed to match the outer contour of the mixed-flow impeller, forming an evenly spaced, enveloping intake air duct to prevent airflow "escape" and turbulence. The outer edge of the center arches axially to form an annular arch, which connects to the annular wall and corresponds to the tail edge of the impeller. This provides sufficient space for high-speed rotating airflow, helping to maintain stable airflow pressure within the duct and preventing radiated noise caused by pressure changes due to uneven airflow distribution. Furthermore, sound-absorbing cotton is installed at the air outlet to effectively absorb vibration noise generated by the impeller during high-speed rotation, achieving effective noise reduction. Attached Figure Description

[0015] Figure 1 The image shown is a schematic diagram of the glass washing machine in the embodiment. Figure 2 The image shown is a cross-sectional view of the glass washing machine in the embodiment. Figure 3 As shown Figure 2 Enlarged view of region A in the middle; Figure 4 The diagram shown is a partial exploded view of the suction unit in the embodiment. Figure 5 The diagram shown is an exploded view of the suction unit in the embodiment. Detailed Implementation

[0016] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0017] In the description of this utility model, terms such as "upper", "lower", "left", "right", "front", and "rear" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0019] Reference Figures 1 to 5 As shown, this embodiment provides a glass cleaning machine, including a suction nozzle assembly 11, a water tank 12, and a suction host 20 connected in sequence. The suction nozzle assembly 11 has a T-shaped structure and a horizontally elongated suction port. The suction nozzle assembly 11 is connected to the water tank 12, and the negative pressure inlet 201 of the suction host 20 is connected to the water tank 12. The suction host 20 extracts air from the water tank 12, creating a negative pressure in the water tank 12, thereby drawing in external water stains and air from the suction port of the suction nozzle assembly 11. Water stains and other dirt remain in the water tank 12, while air is drawn in and discharged from the negative pressure inlet 201 of the suction host 20.

[0020] Specifically, the suction unit 20 includes a drive motor 24 and an impeller assembly. The impeller assembly includes a bottom shell 23, a mixed-flow impeller 22, and an impeller cover 21. The impeller cover 21 covers the bottom shell 23 to form a receiving cavity. The mixed-flow impeller 22 is preferably a nine-blade mixed-flow impeller with nine blades. The mixed-flow impeller 22 is assembled in the receiving cavity and connected to the drive shaft of the drive motor 24. Further, the impeller cover 21 includes a central portion 211, an annular arched portion 212 arched axially from the outer edge of the central portion 211, and an annular wall 23 connecting the annular arched portion 212. The central portion 211 corresponds to the blade assembly of the mixed-flow impeller 22 and is adapted to the outer contour of the mixed-flow impeller 22. In this embodiment, the outer contour of the mixed-flow impeller 22 is conical or trumpet-shaped, and the central portion 211 is also conical or trumpet-shaped. The central portion 211 covers one side of the blades of the mixed-flow impeller 22, thereby forming a wrap-around intake duct 202. This wrap-around intake duct 202 refers to the formation of an equally spaced annular intake duct 202 between the mixed-flow impeller 22 and the central portion 211 in the radial cross-section to prevent airflow "escape" and turbulence. A negative pressure inlet 201 is provided at the top center of the central portion 211, and the annular arched portion 212 corresponds to the trailing edge of the blades of the mixed-flow impeller 22. The annular wall 23 is located on the outer periphery of the mixed-flow impeller 22 in the radial direction and has an outlet 204.

[0021] The working process of the suction unit is as follows: The drive motor 24 drives the mixed-flow impeller 22 to rotate. The rotation of the mixed-flow impeller 22 draws airflow in from the negative pressure inlet 201 and throws it out from the trailing edge of the blades of the mixed-flow impeller 22. That is, it flows through the suction duct 202 into the outer annular cavity 203 formed by the annular wall 213 and the annular arched part 212. The design of the mixed-flow impeller 22 and its enveloping suction duct 202 allows the airflow to flow more closely to the surface of the impeller (i.e., the mixed-flow impeller 22), improving the impeller's ability to cut and guide the airflow, making the flow smoother, and reducing airflow turbulence and energy loss. At the same time, when the drawn-in airflow flows into the outer annular cavity 203, the arched annular arched part 212 provides sufficient space for the high-speed rotating flow to converge and finally flow out from the outlet 204; this helps to maintain the stability of the airflow pressure in the duct; thus, it avoids the radiation noise caused by pressure changes due to uneven airflow distribution in the duct, achieving an effective noise reduction effect.

[0022] Specifically, in this embodiment, the cross-section of the annular arched portion 212 is an arc-shaped arch, and the annular arched portion 212 and the central portion 211 form an arc-shaped transition; this arrangement can guide the airflow more smoothly and facilitate the smooth flow of air.

[0023] The impeller cover 21 has a central part 211, annular arched part 212 and annular wall 213 as an integrally connected structure. It can be integrally formed by injection molding or other methods, which is simple to manufacture, has small dimensional error and no assembly gap.

[0024] Furthermore, since glass washing machines require high-speed impeller rotation to generate negative pressure, typically exceeding 20,000 rpm, this generates high-frequency vibration noise. Therefore, to improve noise reduction, in this embodiment, sound-absorbing cotton 25 is added at the air outlet 204. The sound-absorbing cotton 25 has a porous structure; when high-frequency noise waves enter the sound-absorbing cotton 25, it causes air vibration within the pores. Due to friction between the air and the pore walls, as well as the interaction between air molecules, sound energy is gradually converted into heat energy, thereby reducing the noise.

[0025] The drive motor 24 is fixed on the bottom shell 23, that is, the drive motor 24 is fixed at the bottom of the bottom shell 23, and its drive shaft extends upward and connects to the mixed flow impeller 22.

[0026] Furthermore, the glass washing machine is a handheld structure and also has a handheld housing 13, in which the drive motor 24 and the impeller assembly are assembled; the handheld housing 13 is connected to the water tank 12.

[0027] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A glass cleaning machine, comprising a suction nozzle assembly, a water tank, and a suction unit connected in sequence, wherein the suction nozzle assembly is connected to the water tank, and the negative pressure inlet of the suction unit is connected to the water tank; characterized in that: The suction unit includes a drive motor, an impeller assembly, and sound-absorbing cotton. The impeller assembly includes a bottom shell, a mixed-flow impeller, and an impeller cover. The impeller cover is fitted onto the bottom shell to form a receiving cavity. The mixed-flow impeller is assembled in the receiving cavity and connected to the drive shaft of the drive motor. The impeller cover includes a central portion, an annular arched portion that arches axially from the outer edge of the central portion, and an annular wall connecting the annular arched portion. The central portion corresponds to the blade assembly of the mixed-flow impeller and is adapted to the outer contour of the mixed-flow impeller. A negative pressure inlet is provided at the top center of the central portion. The annular wall is located on the radial outer periphery of the mixed-flow impeller and has an air outlet. The sound-absorbing cotton is disposed at the air outlet.

2. The glass washing machine according to claim 1, characterized in that: The cross-section of the annular arch is an arc-shaped arch.

3. The glass washing machine according to claim 1 or 2, characterized in that: The annular arched portion forms an arc-shaped transition with the central portion.

4. The glass washing machine according to claim 1, characterized in that: The central part, the annular arched part, and the annular wall of the impeller cover are integrally connected structures.

5. The glass washing machine according to claim 1, characterized in that: The mixed-flow impeller is a nine-bladed mixed-flow impeller with nine blades.

6. The glass washing machine according to claim 1, characterized in that: The central part is conical or trumpet-shaped.

7. The glass washing machine according to claim 1, characterized in that: The drive motor is fixed to the bottom shell.

8. The glass washing machine according to claim 1 or 7, characterized in that: The suction unit also has a handheld housing, and the drive motor and impeller assembly are assembled inside the handheld housing; the handheld housing is connected to the water tank.

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