Volute fan and cleaning device

Abstract

The utility model discloses a volute fan and a cleaning device. The volute fan comprises a volute, a fan assembly, a mounting plate and a circuit board. Wherein the volute is provided with a first cavity and a second cavity which are sequentially arranged in the first direction, and an opening is formed in the top of the second cavity; the fan assembly is arranged in the volute and comprises an impeller and a motor, the impeller is rotatably arranged in the first cavity, and the motor is arranged in the second cavity and is in driving connection with the impeller; the mounting plate is connected to the volute and arranged close to the opening, and the motor is fixedly arranged on the mounting plate; the circuit board is arranged on the mounting plate, at least part of the circuit board covers the opening in a sealing mode, and the circuit board is electrically connected with the motor. The problems that in the prior art, a volute fan of a sweeping robot is poor in waterproof performance, and a motor in the fan is prone to being damaged can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of cleaning equipment, and in particular to a volute blower and a cleaning device. Background Art

[0002] A sweeping robot, also known as an automatic cleaning machine, smart vacuum cleaner, robot vacuum cleaner, etc., is a type of smart home appliance that can automatically complete floor cleaning in the room with a certain degree of artificial intelligence.

[0003] The cleaning mechanism of sweeping robots often uses a volute fan, which generates negative pressure through its rotation, drawing dust and impurities into the dust box. However, the volute fans in existing sweeping robots are not waterproof, which can easily damage the motor inside the fan. Furthermore, when the sweeping robot is in an environment with high humidity or on a wet surface, the volute fan draws moisture-laden air into the volute. The moisture-laden air, under the suction force of the negative pressure, flows to the motor and electronic control board, potentially causing corrosion and damage to the motor and electronic control board. Utility Model Content

[0004] The main purpose of the present application is to provide a volute fan and a cleaning device to solve the problem that the volute fan of the sweeping robot in the prior art has poor waterproof performance and is easy to cause damage to the motor inside the fan.

[0005] According to one aspect of the present application, a volute blower is provided, comprising:

[0006] a volute, the volute having a first chamber and a second chamber sequentially arranged along a first direction, wherein the top of the second chamber is provided with an opening;

[0007] a fan assembly, the fan assembly being disposed in the volute, the fan assembly comprising an impeller and a motor, the impeller being rotatably disposed in the first chamber, the motor being disposed in the second chamber and drivingly connected to the impeller;

[0008] a mounting plate connected to the volute and disposed near the opening, and the motor is fixedly mounted on the mounting plate;

[0009] A circuit board is arranged on the mounting plate, at least a portion of the circuit board sealing cover is arranged on the opening, and the circuit board is electrically connected to the motor.

[0010] Furthermore, an annular flange is provided on the outer periphery of one end of the second chamber close to the impeller, an annular gap is provided between the annular flange and the impeller, and the annular gap connects the first chamber and the second chamber.

[0011] Furthermore, an annular groove is provided on a side of the annular flange close to the impeller.

[0012] Furthermore, an annular ridge is provided at one end of the second chamber close to the opening, and at least a portion of the circuit board sealing cover is provided at the opening and abuts against the annular ridge.

[0013] Furthermore, the circuit board includes a first plate body and a second plate body, the first plate body is connected to the mounting plate and a sealing cover is provided on the opening, the second plate body is provided with a plurality of connectors, and each of the connectors is provided with an insulating layer.

[0014] Furthermore, the motor has a housing, and a ventilation hole is provided on an end surface of the housing close to the impeller, and the ventilation hole connects the interior of the housing with the first chamber.

[0015] Furthermore, the ventilation hole comprises a tapered hole.

[0016] Furthermore, the ventilation hole includes one or more ventilation holes. When there are multiple ventilation holes, the multiple ventilation holes are arranged at intervals along the circumference of the housing on the end surface of the housing close to the impeller.

[0017] Furthermore, the volute includes a first shell and a second shell, one of the first shell and the second shell is provided with a buckle, and the other is provided with a slot adapted to the buckle.

[0018] On the other hand, the present application also provides a cleaning device, which includes the above-mentioned volute blower.

[0019] Since at least part of the circuit board sealing cover in the present application is arranged at the opening, the gap between the circuit board and the volute is smaller. When there is water vapor on the periphery of the volute fan, the arrangement of the circuit board can seal the second chamber, so that the second chamber constitutes a sealed space, which can prevent water vapor from entering the interior of the volute from the opening, thereby improving the waterproof performance of the volute fan to a certain extent, effectively ensuring the normal operation of the motor inside the volute, and extending the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 A cross-sectional view of a volute blower disclosed in an embodiment of the present application;

[0022] Figure 2 This is a schematic structural diagram of a volute blower disclosed in an embodiment of the present application;

[0023] Figure 3 A top view of the volute blower disclosed in an embodiment of the present application;

[0024] Figure 4 This is a bottom view of the volute blower disclosed in an embodiment of the present application.

[0025] The above drawings include the following reference numerals:

[0026] 10. Volute; 101. First chamber; 102. Second chamber; 103. Opening; 104. Air inlet; 105. Air outlet; 11. First shell; 111. Buckle; 12. Second shell; 121. Slot; 20. Fan assembly; 21. Impeller; 22. Motor; 221. Housing; 222. Ventilation hole; 30. Mounting plate; 40. Circuit board; 41. First plate; 42. Second plate; 50. Annular flange; 501. Annular gap; 60. Annular groove; 70. Connector; 80. Annular ridge. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as being merely exemplary, not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0030] As mentioned in the background technology, the cleaning mechanism of existing sweeping robots mostly uses a volute fan, and the rotation of the volute fan generates negative pressure to suck dust and impurities into the dust box. However, due to the poor waterproof performance of the fan of the sweeping robot, it is easy to damage the electrodes inside the fan. To this end, the inventors of this application have designed a new type of volute fan, which can solve the problem of poor waterproof performance of the volute fan of the sweeping robot in the prior art, which is easy to damage the motor inside the fan. The volute fan of this application will be described in detail below with reference to the accompanying drawings.

[0031] It should be noted that the “first direction” in this application refers to the Figure 1 The direction indicated by the letter X.

[0032] See also Figures 1 to 4 As shown, according to an embodiment of the present application, a volute blower is provided, which includes a volute 10 , a blower assembly 20 , a mounting plate 30 and a circuit board 40 .

[0033] Specifically, the volute 10 has a first chamber 101 and a second chamber 102 arranged in sequence along a first direction, and an opening 103 is provided at the top of the second chamber 102; the fan assembly 20 is arranged in the volute 10, and the fan assembly 20 includes an impeller 21 and a motor 22, the impeller 21 is rotatably arranged in the first chamber 101, and the motor 22 is arranged in the second chamber 102 and is drivingly connected to the impeller 21; the mounting plate 30 is connected to the volute 10 and is arranged near the opening 103, and the motor 22 is fixed on the mounting plate 30; the circuit board 40 is arranged on the mounting plate 30, at least part of the circuit board 40 sealing cover is arranged in the opening 103, and the circuit board 40 is electrically connected to the motor 22.

[0034] When the volute blower of this embodiment is installed on a cleaning device, such as a sweeping robot, the circuit board 40 is connected to the motor 22 and the motor 22 is driven to rotate, thereby driving the impeller 21 to rotate. When the impeller 21 rotates, a negative pressure is formed in the first chamber 101 of the volute 10, thereby generating a suction force to draw the air outside the volute 10 into the first chamber 101 of the volute 10. The air sucked into the first chamber 101 flows in the volute 10 under the centrifugal effect of the rotation of the impeller 21. In this process, since the volute blower of this embodiment is installed in the sweeping robot and connected to the dust box, the negative pressure formed by the rotation of the volute blower can draw dust and impurities on the ground into the dust box, ultimately achieving cleaning of the ground.

[0035] At the same time, since at least part of the circuit board 40 sealing cover in this embodiment is arranged at the opening 103, the gap between the circuit board 40 and the volute 10 will be smaller. When there is water vapor on the periphery of the volute fan, the setting of the circuit board 40 can seal the second chamber 102, so that the second chamber 102 constitutes a sealed space, which can prevent water vapor from entering the interior of the volute 10 from the opening 103, thereby improving the waterproof performance of the volute fan to a certain extent, effectively ensuring the normal operation of the motor 22 inside the volute 10, and extending the service life of the motor 22.

[0036] It is understandable that the volute 10 in this embodiment further has an air inlet 104 and an air outlet 105, and the first chamber 101 is connected to the air inlet 104 and the air outlet 105. When the motor 22 in this embodiment drives the impeller 21 to rotate at high speed, the air in the first chamber 101 is discharged outward through the air outlet 105, causing the air pressure in the first chamber 101 to drop, forming a negative pressure area. The air around the air inlet 104 of the volute 10 will flow into the first chamber 101 through the air inlet 104 due to the effect of pressure difference compensation, and then flow in the first chamber 101 under the centrifugal action of the rotation of the impeller 21, and flow out from the air outlet 105.

[0037] Further, see Figure 1 As shown, in this embodiment, an annular flange 50 is provided on the outer periphery of one end of the second chamber 102 close to the impeller 21 , and an annular gap 501 is provided between the annular flange 50 and the impeller 21 , and the annular gap 501 connects the first chamber 101 and the second chamber 102 .

[0038] Specifically, the setting of the annular gap 501 is not only to ensure that the impeller 21 can rotate smoothly under the drive of the motor 22, prevent the impeller 21 from colliding with the volute 10, and extend the service life of the impeller 21, but also to form an air flow channel so that the gas in the first chamber 101 enters the second chamber 102 from the annular gap 501, thereby dissipating the heat of the motor 22 in the working state.

[0039] Further, see Figure 1 As shown, an annular groove 60 is provided on the side of the annular flange 50 close to the impeller 21 in this embodiment.

[0040] Specifically, since this embodiment generates negative pressure by the rotation of the volute fan to suck dust and impurities into the dust box, when the sweeping robot is in an environment with high air humidity or on a wet ground, the volute fan sucks air containing water vapor from the air inlet 104 into the first chamber 101, and an annular gap 501 is provided between the impeller 21 and the second chamber 102 in this embodiment. At this time, the air mixed with water vapor will flow from the annular gap 501 to the second chamber 102 under the action of the suction force of the negative pressure, and then be blown onto the motor 22 and the circuit board 40, which can easily cause the motor 22 and the circuit board 40 to be corroded and damaged. To this end, this embodiment is provided with an annular groove 60 on the annular flange 50, which can play a certain blocking role on the airflow entering the annular gap 501, so as to reduce the amount of airflow entering the second chamber 102 from the annular gap 501, and extend the stroke of the airflow through the annular gap 501, and to a certain extent prevent the airflow mixed with water vapor from flowing directly to the motor 22 and the circuit board 40 located in the second chamber 102, thereby preventing the motor 22 and the circuit board 40 from being corroded and damaged, and extending the service life of the motor 22 and the circuit board 40.

[0041] Further, in order to improve the sealing effect between the circuit board 40 and the volute 10, see Figure 1 As shown, in this embodiment, an annular ridge 80 is provided at one end of the second chamber 102 near the opening 103, and at least a portion of the sealing cover of the circuit board 40 is disposed in the opening 103 and abuts against the annular ridge 80. This arrangement, in addition to the sealing cover of the circuit board 40 being disposed in the opening 103, can further reduce the gap between the circuit board 40 and the volute 10, effectively improving the sealing effect of the circuit board 40 on the second chamber 102, ensuring that the second chamber 102 is completely sealed. This prevents moisture from entering the interior of the volute 10 through the opening 103, thereby improving the waterproof performance of the volute blower to a certain extent and extending the service life of the motor 22.

[0042] Further, see Figure 1 As shown, the circuit board 40 in this embodiment includes a first board body 41 and a second board body 42. The first board body 41 is connected to the mounting plate 30 and a sealing cover is provided on the opening 103. A plurality of connectors 70 are provided on the second board body 42, and each connector 70 is provided with an insulating layer.

[0043] Specifically, since only a portion of the sealing cover of the circuit board 40 in this embodiment is located within the opening 103, the remaining portion of the circuit board 40 is exposed to the outside of the volute 10. If moisture is present outside the volute 10, it will affect the connectors 70 on the circuit board 40 exposed outside the volute 10. To this end, this embodiment provides an insulating layer on each connector 70, which not only insulates and protects the connector 70 but also provides a waterproofing effect, effectively preventing damage to the connector 70 from corrosion by moisture and, to a certain extent, extending the service life of the connector 70. It will be understood that the insulating layer in this embodiment comprises conformal coating, and the connector 70 is used to connect the circuit board 40 to other components within the robot vacuum cleaner.

[0044] Further, see Figure 1 As shown, the motor 22 in this embodiment has a housing 221 , and a ventilation hole 222 is provided on the end surface of the housing 221 close to the impeller 21 . The ventilation hole 222 connects the interior of the housing 221 with the first chamber 101 .

[0045] Specifically, in this embodiment, the motor 22 drives the impeller 21 to rotate, thereby generating suction wind within the first chamber 101. Since the first chamber 101 and the second chamber 102 are connected via the annular gap 501, the heat generated by the motor 22 within the second chamber 102 can be dissipated from the interior of the second chamber 102 to the first chamber 101 by the suction wind, and finally dissipated to the outside of the volute 10 through the air outlet 105 of the first chamber 101. This effectively dissipates the heat within the second chamber 102, ensuring that the temperature within the second chamber 102 is at a temperature suitable for the motor 22, thereby ensuring the power safety of the motor 22. At the same time, since the motor 22 is provided with a stator and a rotor, the rotation of the stator and the rotor will generate heat inside the housing 221 of the motor 22. Therefore, this embodiment provides a ventilation hole 222 on the end face of the housing 221 close to the impeller 21, and makes the ventilation hole 222 connect the interior of the housing 221 with the first chamber 101. In this way, the heat generated inside the housing 221 can be driven by the suction wind force to dissipate from the interior of the housing 221 to the second chamber 102, and then dissipate to the first chamber 101, thereby further improving the heat dissipation effect of the motor 22.

[0046] Furthermore, the ventilation holes 222 in this embodiment comprise tapered holes. This configuration provides a simple structure and facilitates processing. Furthermore, the gradually expanding structure of the tapered holes helps reduce resistance to gas flow, allowing gas to smoothly pass through the ventilation holes 222, thereby improving overall gas flow performance. This in turn ensures that heat within the housing 221 of the motor 22 is dissipated into the second chamber 102 through the tapered holes, thereby lowering the temperature within the motor 22 and effectively improving the heat dissipation effect of the motor 22.

[0047] Furthermore, the ventilation holes 222 in this embodiment include one or more ventilation holes 222. When there are multiple ventilation holes 222, the multiple ventilation holes 222 are spaced apart along the circumference of the housing 221 on the end surface of the housing 221 close to the impeller 21. It is understood that the ventilation hole 222 in this embodiment can be provided as one, or as two or more ventilation holes. This application does not make any specific restrictions here, and can be set according to actual processing requirements.

[0048] Specifically, the setting of the ventilation holes 222 can conduct the heat generated inside the shell 221 of the motor 22 to the second chamber 102. By setting multiple ventilation holes 222, this embodiment can significantly increase the heat flow, thereby more effectively achieving ventilation of the internal space of the shell 221 and reducing the temperature inside the shell 221.

[0049] Further, see Figures 2 to 4 As shown, the volute 10 in this embodiment includes a first shell 11 and a second shell 12. A buckle 111 is provided on one of the first shell 11 and the second shell 12, and a slot 121 that matches the buckle 111 is provided on the other of the first shell 11 and the second shell 12. Specifically, the provision of the buckle 111 and the slot 121 enables the first shell 11 and the second shell 12 to be quickly connected, improving assembly efficiency and facilitating the installation and removal of the first shell 11 and the second shell 12. At the same time, the tight connection between the buckle 111 and the slot 121 helps the volute 10 to form an effective seal, thereby protecting the fan and impeller 21 inside the volute 10 from the external environment, such as dust and moisture.

[0050] It is understandable that in this embodiment, the buckle 111 can be provided on the first shell 11 and the slot 121 can be provided on the second shell 12, or the slot 121 can be provided on the first shell 11 and the buckle 111 can be provided on the second shell 12. Figure 2 3 shows a situation where the first shell 11 is provided with a buckle 111 and the second shell 12 is provided with a slot 121 .

[0051] In combination with the above-mentioned embodiments, it can be known that the present application sets the sealing cover of the circuit board 40 in the opening 103 and fixes the motor 22 on the mounting plate 30. In this way, it can ensure that the gap between the circuit board 40 and the volute 10 is small or there is no gap, thereby preventing water vapor from entering the interior of the volute 10 and having an adverse effect on the motor 22, thereby extending the service life of the motor.

[0052] On the other hand, embodiments of the present application further provide a cleaning device, such as a sweeping robot, which includes the aforementioned volute blower. Therefore, the cleaning device includes all the technical effects of the aforementioned volute blower. Since the technical effects of the volute blower have been described in detail above, they will not be repeated here.

[0053] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0054] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0055] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A volute fan, characterized in that: include: A volute (10), the volute (10) having a first chamber (101) and a second chamber (102) sequentially arranged along a first direction, wherein the top of the second chamber (102) is provided with an opening (103); A fan assembly (20), the fan assembly (20) being disposed in the volute (10), the fan assembly (20) comprising an impeller (21) and a motor (22), the impeller (21) being rotatably disposed in the first chamber (101), the motor (22) being disposed in the second chamber (102) and drivingly connected to the impeller (21); a mounting plate (30), the mounting plate (30) being connected to the volute (10) and disposed close to the opening (103), and the motor (22) being fixed on the mounting plate (30); A circuit board (40) is provided on the mounting plate (30), at least a portion of the circuit board (40) sealing cover is provided on the opening (103), and the circuit board (40) is electrically connected to the motor (22).

2. The volute blower according to claim 1, characterized in that: An annular flange (50) is provided on the outer periphery of one end of the second chamber (102) close to the impeller (21), and an annular gap (501) is provided between the annular flange (50) and the impeller (21), and the annular gap (501) communicates with the first chamber (101) and the second chamber (102).

3. The volute blower according to claim 2, characterized in that: An annular groove (60) is provided on one side of the annular flange (50) close to the impeller (21).

4. The volute blower according to claim 1, characterized in that: An annular ridge (80) is provided at one end of the second chamber (102) close to the opening (103), and at least a portion of the circuit board (40) sealing cover is provided at the opening (103) and abuts against the annular ridge (80).

5. The volute blower according to claim 1, characterized in that: The circuit board (40) comprises a first plate body (41) and a second plate body (42), wherein the first plate body (41) is connected to the mounting plate (30) and a sealing cover is provided on the opening (103), and a plurality of connecting members (70) are provided on the second plate body (42), and each of the connecting members (70) is provided with an insulating layer.

6. The volute blower according to claim 1, characterized in that: The motor (22) has a housing (221), and a ventilation hole (222) is provided on the end surface of the housing (221) close to the impeller (21), and the ventilation hole (222) connects the interior of the housing (221) with the first chamber (101).

7. The volute blower according to claim 6, characterized in that: The ventilation hole (222) comprises a tapered hole.

8. The volute blower according to claim 6, characterized in that: The ventilation holes (222) include one or more ventilation holes. When there are multiple ventilation holes (222), the multiple ventilation holes (222) are arranged at intervals along the circumference of the housing (221) on the end surface of the housing (221) close to the impeller (21).

9. The volute blower according to any one of claims 1 to 8, characterized in that: The volute (10) comprises a first shell (11) and a second shell (12), wherein a buckle (111) is provided on one of the first shell (11) and the second shell (12), and a slot (121) adapted to the buckle (111) is provided on the other of the first shell (11) and the second shell (12).

10. A cleaning device, characterized in that: The cleaning device comprises the volute blower according to any one of claims 1 to 9.

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