Electric fan and dust collector

Abstract

The utility model discloses an electric fan and a dust collector. The electric fan comprises a motor, a movable impeller, a fixed impeller, a fan cover and a radiator. Wherein the motor comprises a rotating shaft; the movable impeller is mounted on the rotating shaft; the fixed impeller is mounted on the rotating shaft and is arranged between the movable impeller and the motor; the fan cover is fixedly installed on the fixed impeller, a containing cavity is defined between the fan cover and the fixed impeller, the movable impeller is arranged in the containing cavity, and an air inlet is formed in the fan cover of the movable impeller; the radiator is fixedly installed on the fixed impeller and is far away from the movable impeller, the radiator is in heat conduction connection with the motor, and an air outlet is formed in the radiator; wherein a first air duct communicated with the air inlet is formed in the movable impeller, a second air duct communicated with the air outlet is formed in the radiator, and a third air duct communicated with the first air duct and the second air duct is formed in the fixed impeller. According to the utility model, long-time continuous operation of the motor can be maintained, motor performance is not affected, and deformation of the dust collector housing is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of electromechanical technology, and in particular relates to an electric fan and a dust collector. Background Art

[0002] A vacuum cleaner is a cleaning appliance that uses a motor to drive the blades to rotate at high speed, creating negative air pressure in a sealed housing, thereby sucking dust and other debris into a dust bag. The vacuum cleaner includes an electric fan and a housing located outside the electric fan. The electric fan is the core component of the vacuum cleaner. To facilitate ventilation, an exhaust window is provided on the housing.

[0003] When the electric blower is running at high speed, the motor will quickly generate high temperature. If the motor cannot be cooled effectively, the electric blower cannot continue to work for a long time. If it insists on working for a long time, not only will the motor performance gradually decline, but the temperature of the outer wall of the shell will also continue to rise. The shell of existing vacuum cleaners is usually made of plastic. If the temperature of the outer wall of the shell is too high, it will easily cause the shell to deform.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0005] The utility model aims to provide an electric blower and a vacuum cleaner, which can maintain the motor to work continuously for a long time, ensure the motor performance remains unchanged, and avoid deformation damage to the vacuum cleaner shell.

[0006] In order to achieve the above purpose, the technical solution provided by a specific embodiment of the utility model is as follows:

[0007] An electric blower, comprising:

[0008] A motor, wherein the motor comprises a rotating shaft;

[0009] A moving impeller is mounted on the rotating shaft;

[0010] A fixed impeller is mounted on the rotating shaft and is disposed between the movable impeller and the motor;

[0011] An air hood is fixedly mounted on the fixed impeller, the air hood and the fixed impeller enclose a receiving cavity, the impeller is arranged in the receiving cavity, and an air inlet is formed on the impeller air hood;

[0012] A radiator is fixedly mounted on the fixed impeller and is arranged away from the movable impeller. The radiator is thermally connected to the motor and has an air outlet.

[0013] A first air duct connected to the air inlet is formed in the movable impeller, a second air duct connected to the air outlet is formed in the radiator, and a third air duct connected to the first air duct and the second air duct is formed in the stator.

[0014] In one or more embodiments of the present utility model, the heat sink includes a main body and a plurality of first blades circumferentially spaced apart on the main body, a heat conductor is provided between the inner wall of the main body and the outer wall of the motor, and two adjacent first blades and the main body form a second air duct.

[0015] In one or more embodiments of the present invention, the heat conducting member is heat conducting silica gel; and / or,

[0016] The radiator is an aluminum radiator.

[0017] In one or more embodiments of the present invention, a sealing ring is provided between the main body and the stator impeller.

[0018] In one or more embodiments of the present utility model, the fixed impeller includes a base plate arranged toward the movable impeller, a first ring body arranged on the base plate and extending away from the movable impeller, second blades distributed at intervals along the circumference of the first ring body, and a second ring body sleeved outside the second blades. Two adjacent second blades, the first ring body, and the second ring body enclose the third air duct.

[0019] In one or more embodiments of the present invention, the third air duct is connected to at least two of the second air ducts.

[0020] In one or more embodiments of the present invention, the second blade is tilted, and the second blade includes a first end close to the impeller and a second end away from the impeller, and at least one first blade is provided between two first blades located above the second ends of two adjacent second blades.

[0021] In one or more embodiments of the present invention, the first blade is in the shape of a flat plate and is disposed perpendicular to the bottom plate.

[0022] In one or more embodiments of the present invention, the number of the first blades is M*N, and the number of the second blades is N.

[0023] Another specific embodiment of the present invention provides a technical solution as follows:

[0024] A vacuum cleaner comprises the electric blower as described above.

[0025] Compared with the prior art, the utility model has the following beneficial effects:

[0026] The utility model provides an electric blower and a vacuum cleaner. The electric blower can reduce the temperature of a motor by setting a radiator, avoid the motor being in an overheated state for a long time, keep the motor running continuously at high power, and increase the service life of various parts of the electric blower; when the electric blower is used in a vacuum cleaner, it can prevent the outer shell from overheating and avoid deformation damage of the outer shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a schematic cross-sectional view of the electric fan in the first embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of the top view of the radiator in the first embodiment of the utility model;

[0030] Figure 3 for Figure 1 A magnified view of the local structure at point A in the middle;

[0031] Figure 4 This is a schematic diagram of the top view of the fixed impeller in the first embodiment of the utility model;

[0032] Figure 5 This is a schematic diagram of the top view of the radiator and the stator impeller in the first embodiment of the utility model;

[0033] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure at AA in the middle;

[0034] Figure 7 This is a schematic cross-sectional view of the vacuum cleaner in Embodiment 3 of the present utility model;

[0035] Figure 8 This is a temperature change diagram of the outer wall of the motor and the outer wall of the housing after the vacuum cleaner in the third embodiment of the present utility model has been running continuously for a long time;

[0036] Fig. 9 It is a cross-sectional structural schematic diagram of a vacuum cleaner in a comparative example of the utility model;

[0037] Fig.10 This is a temperature change diagram of the outer wall of the motor and the outer wall of the shell after the vacuum cleaner in the comparative example of the utility model has been running continuously for a long time. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0041] The technical solution of the present utility model will be described below in conjunction with the accompanying drawings.

[0042] Reference Figure 1 As shown, the electric fan in this embodiment includes a motor 1, a moving impeller 2, a fixed impeller 3, a fan cover 4, and a radiator 5.

[0043] Among them, the motor 1 in this embodiment includes a rotating shaft 11; the impeller 2 is installed on the rotating shaft 11; the stator 3 is installed on the rotating shaft 11 and is arranged between the impeller 2 and the motor 1; the fan 4 is fixedly installed on the stator 3, and the fan 4 and the stator 3 form a receiving cavity, the impeller 2 is arranged in the receiving cavity, and an air inlet 40 is formed on the fan 4 of the impeller 2; the radiator 5 is fixedly installed on the stator 3 and is arranged away from the impeller 2, the radiator 5 is thermally connected to the motor 1, and an air outlet 50 is formed on the radiator 5; wherein, a first air duct connected to the air inlet 40 is formed in the impeller 2, a second air duct connected to the air outlet 50 is formed in the radiator 5, and a third air duct connecting the first air duct and the second air duct is formed in the stator 3.

[0044] By arranging a radiator 5 on the side of the stator impeller 3 away from the impeller 2, the first air duct, the second air duct, and the third air duct in the present embodiment jointly form a heat dissipation air duct. When the electric blower is working, the impeller 2 rotates around the rotating shaft 11 under the action of the motor 1. Under the action of the impeller 2, external air flows in from the air inlet 40 and flows through the first air duct, the second air duct, and the third air duct in turn, and then flows out of the electric blower from the air outlet 50. After these gases with lower temperatures flow through the radiator 5, they can contact with the radiator 5 and exchange heat. Since the radiator 5 and the motor 1 are thermally connected, the radiator 5 after the temperature is reduced can exchange heat with the motor 1 with a higher temperature, and take away excess heat from the motor 1, so as to keep the motor 1 running continuously at high power, avoid the motor 1 being in an overheated state for a long time, and improve the service life of various components of the electric blower.

[0045] Specifically, in order to guide the gas entering the electric fan through the air inlet 40 under the action of the impeller 2, and then passing through the fixed impeller 3 and then being guided out of the electric fan through the radiator 5, refer to Figure 2 , Figure 3 As shown, the heat sink 5 in this embodiment includes a main body 51 and a plurality of first blades 52 distributed on the main body 51 at intervals along the circumferential direction, a heat conducting member 6 is provided between the main body 51 and the outer wall of the motor 1, and two adjacent first blades 52 and the main body 51 are enclosed to form a second air duct. Among them, the first blade 52 can be a flat blade or a curved blade, which can be understood and accepted by those skilled in the art.

[0046] Preferably, in order to enhance the heat exchange between the radiator 5 and the motor 1, the heat conducting member 6 in this embodiment is a heat conducting silica gel. Further, the heat conducting silica gel can be selected from Kraft K-5203K heat conducting silica gel, which has a thermal conductivity of 1.2 and has strong thermal conductivity, which is conducive to reducing the temperature of the motor 1 through the radiator 5 with a lower temperature. Of course, the present application is not limited to this, and the heat conducting member 6 in other embodiments can also be heat dissipation paste, or thermal conductive silicone grease, or silicone sheet, etc.

[0047] Preferably, the radiator 5 in this embodiment is an aluminum radiator 5 . Aluminum has strong thermal conductivity and low cost, which is conducive to heat exchange between cold air and the motor 1 through the radiator 5 .

[0048] Preferably, refer to Figure 3 As shown, a sealing ring 7 is provided between the main body 51 and the stator impeller 3 in this embodiment. The sealing ring 7 may be an O-shaped sealing ring or a Y-shaped sealing ring or other sealing rings with a non-circular cross section. By providing the sealing ring 7, it is possible to prevent the heat conducting member 6 from leaking out of the gap between the main body 51 and the stator impeller 3 when the electric fan is in operation, which is conducive to keeping the heat conducting member 6 between the inner wall of the main body 51 and the outer wall of the motor 1.

[0049] For example, in order to install the sealing ring 7, refer to Figure 3 As shown, in this embodiment, an annular groove 311 is provided on the surface of the stator impeller 3 facing the main body 51, and the sealing ring 7 is embedded in the annular groove 311 and is sealed and connected with the surface of the main body 51 facing the stator impeller 3, thereby blocking the gap between the main body 51 and the stator impeller 3. Of course, the present application is not limited to this, and the annular groove 311 can also be provided on the surface of the main body 51 facing the stator impeller 3.

[0050] Specifically, in order to guide the gas entering the electric fan through the air inlet 40 under the action of the impeller 2 to the radiator 5 through the stator 3, refer to Figure 4 As shown, the fixed impeller 3 in this embodiment includes a bottom plate 31 disposed toward the impeller 2, a first ring body 32 disposed on the bottom plate 31 and extending away from the impeller 2, second blades 33 spaced apart along the circumferential direction of the first ring body 32, and a second ring body 34 sleeved outside the second blades 33. Two adjacent second blades 33, the first ring body 32, and the second ring body 34 enclose a third air duct. Among them, the second blade 33 can be a flat blade or a curved blade, which can be understood and accepted by those skilled in the art.

[0051] In order to facilitate the gas flowing through the stator impeller 3 to contact with the radiator 5 and exchange heat, Figure 5 As shown, the third air duct in this embodiment is connected with at least two second air ducts. When the gas enters the electric blower from the air inlet 40, it can pass through the first air duct, the third air duct, and the second air duct in sequence. When the gas in the third air duct enters the second air duct, the airflow will be divided into at least two winds, and both winds can have a cooling effect on the first blade 52 that plays a role in separating the airflow.

[0052] Preferably, refer to Figure 6As shown, the second blade 33 in this embodiment is tilted, and the second blade 33 includes a first end 331 close to the impeller 2 and a second end 332 away from the impeller 2. At least one first blade 52 is provided between the two first blades 52 located above the second ends 332 of the two adjacent second blades 33. According to this design, since the two adjacent second blades 33, the first ring body 32, and the second ring body 34 enclose a third air duct, the airflow can flow in the third air duct, and the corresponding first blades 52 are provided above the second ends 332 of the two adjacent second blades 33. The two first blades 52 can guide the airflow flowing out of the third air duct, and the airflow can flow along the surface of the first blade 52 after hitting the first blade 52, so as to prevent the airflow from flowing in series. In addition, in order to better cool the radiator 5 by the cold air flowing out of the third air duct, at least one first blade 52 that can divert the airflow is arranged between the two first blades 52 located above the second ends 332 of the adjacent second blades 33. When the cold air flowing out of the third air duct is diverted, both sides of the first blade 52 with the diversion effect can contact the cold air flowing out of the third air duct to quickly reduce the temperature of the first blade 52, thereby quickly reducing the temperature of the radiator 5, and then quickly reducing the heat of the motor 1.

[0053] Further, see Figure 6 As shown, the first blade 52 in this embodiment is flat and is arranged perpendicular to the bottom plate 31. Compared with the inclined first blade 52, when the first blade 52 is arranged perpendicular to the bottom plate 31 of the stator impeller 3, the vertical first blade 52 has less noise and better user experience.

[0054] For example, in this embodiment, the number of first blades 52 is M*N, and the number of second blades 33 is N. Figure 5 As shown, illustratively, in this embodiment, the number of first blades 52 is 16, and the number of second blades 33 is 8. Of course, the present application is not limited thereto, and the number of first blades 52 and second blades 33 can be set according to specific actual conditions.

[0055] When M is equal to 2, the radial total area 500 (refer to Figure 5 , Figure 6 Shown) is A.

[0056] When M is greater than or equal to 3, the radial total area (not shown) of the air inlet ports of the plurality of second air ducts formed by the two first blades 52 located above the second ends 332 of the adjacent second blades 33, the plurality of other first blades 52 located between the two first blades 52, and the main body 51 is B. Since A is always greater than B, compared with the solution where M is greater than or equal to 3, when M is equal to 2, the maximum air volume of the electric fan can be increased, thereby improving the efficiency of the entire machine; when applied to a vacuum cleaner, the suction force of the vacuum cleaner can be improved.

[0057] Embodiment 2:

[0058] The second embodiment of the present invention discloses a vacuum cleaner, including the electric blower as described above. According to the design, the electric blower can better cool the motor, prevent the motor and the housing from overheating, avoid the motor efficiency from decreasing, and the housing from deforming. The motor has a long service life, and the motor can stably generate a large air volume for a long time, so as to meet the vacuum cleaner's requirement of long-term stable and good dust suction.

[0059] Embodiment three:

[0060] Reference Figure 7 As shown, the vacuum cleaner includes a housing 8 and an electric blower disposed in the housing 8. For ventilation purposes, an exhaust window is usually provided on the housing 8. When the electric blower in the first embodiment is used as a component of the vacuum cleaner, the impeller 2 rotates at high speed under the action of the rotating shaft 11 of the motor 1, and the cold air with a relatively low temperature is sucked into the wind cover 4 from the air inlet, and after the impeller 2 rotates at high speed, it quickly flows through the fixed impeller 3 and the radiator 5 in sequence, and then flows out of the electric blower from the air outlet 50. In this process, the heat of the motor 1 can be conducted to the radiator 5 through the heat conductor 6. Under the action of the cold air, the temperature of the radiator 5 can be rapidly reduced, thereby playing a role in reducing the temperature of the motor 1.

[0061] When the room temperature is about 20℃, after the electric fan has been working for a long time, refer to Figure 8 As shown, the temperature of the outer wall of the motor 1 can be increased from 18°C ​​to about 39°C and then no longer increase, and the temperature of the outer wall of the housing 8 can be increased from 18°C ​​to about 52°C and then no longer increase. In this case, the efficiency of the motor 1 will not be significantly reduced after long-term continuous operation, and the housing 8 will not be heated to the point of deformation.

[0062] Comparative Example:

[0063] Reference Fig. 9 , Fig.10As shown, when a conventional electric blower without a heat sink 5 is used as a component of a vacuum cleaner, under the same conditions such as temperature, voltage, power, and load, after the electric blower continues to work for a long time, the temperature of the outer wall of the motor 1 will rapidly increase from 18°C ​​to about 52°C, and the temperature of the outer wall of the shell 8 will rapidly increase from 18°C ​​to about 72°C. Compared with the third embodiment, the outer wall temperature of the motor 1 and the outer wall temperature of the shell 8 of the conventional vacuum cleaner are both greater than the outer wall temperature of the motor 1 and the outer wall temperature of the shell 8 of the new vacuum cleaner in the third embodiment. When the motor 1 is running under continuous high temperature conditions, the efficiency of the motor 1 will gradually decrease, and the shell 8 may also be deformed due to the high temperature.

[0064] It can be seen from the above technical solutions that the utility model has the following beneficial effects:

[0065] The utility model provides an electric blower and a vacuum cleaner. The electric blower can reduce the temperature of a motor by setting a radiator, avoid the motor being in an overheated state for a long time, keep the motor running continuously at high power, and increase the service life of various parts of the electric blower; when the electric blower is used in a vacuum cleaner, it can prevent the outer shell from overheating and avoid deformation damage of the outer shell.

[0066] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0067] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An electric fan, characterized in that: The electric fan comprises: A motor, wherein the motor comprises a rotating shaft; A moving impeller is mounted on the rotating shaft; A fixed impeller is mounted on the rotating shaft and is disposed between the movable impeller and the motor; An air hood is fixedly mounted on the fixed impeller, the air hood and the fixed impeller enclose a receiving cavity, the impeller is arranged in the receiving cavity, and an air inlet is formed on the impeller air hood; A radiator is fixedly mounted on the fixed impeller and is arranged away from the movable impeller. The radiator is thermally connected to the motor and has an air outlet. A first air duct connected to the air inlet is formed in the movable impeller, a second air duct connected to the air outlet is formed in the radiator, and a third air duct connected to the first air duct and the second air duct is formed in the stator.

2. The electric blower according to claim 1, characterized in that: The heat sink includes a main body and a plurality of first blades circumferentially spaced and distributed on the main body. A heat conducting member is disposed between the inner wall of the main body and the outer wall of the motor. Two adjacent first blades and the main body are enclosed to form a second air duct.

3. The electric blower according to claim 2, characterized in that: The heat conducting member is heat conducting silica gel; and / or, The radiator is an aluminum radiator.

4. The electric blower according to claim 2, characterized in that: A sealing ring is provided between the main body and the stator impeller.

5. The electric blower according to claim 2, characterized in that: The fixed impeller includes a base plate arranged toward the movable impeller, a first ring body arranged on the base plate and extending away from the movable impeller, second blades spaced circumferentially along the first ring body, and a second ring body sleeved outside the second blades. Two adjacent second blades, the first ring body, and the second ring body enclose the third air duct.

6. The electric blower according to claim 5, characterized in that: The third air duct is connected to at least two of the second air ducts.

7. The electric blower according to claim 5, characterized in that: The second blade is tilted and includes a first end close to the impeller and a second end away from the impeller. At least one first blade is disposed between two first blades located above the second ends of two adjacent second blades.

8. The electric blower according to claim 7, characterized in that: The first blade is in a flat plate shape and is arranged perpendicular to the bottom plate.

9. The electric blower according to claim 5, characterized in that: The number of the first blades is M*N, and the number of the second blades is N.

10. A vacuum cleaner, characterized in that: It comprises the electric blower as claimed in any one of claims 1 to 9.

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