Brushless cleaning machine

Abstract

The utility model discloses a brushless cleaning machine, which comprises a motor, a pump in transmission connection with the motor, a motor controller electrically connected with the motor and used for controlling the motor to operate, fan blades in transmission connection with the motor, and a shell for accommodating the motor and the fan blades, the motor controller comprises a controller box connected with the shell, the controller box is provided with a first air inlet, and the controller box and the shell form an air duct structure communicating the controller box with the shell. When the motor drives the pump to execute a cleaning function, the fan blades are driven to rotate to extract external air, so that the air enters the controller box through the first air inlet to dissipate heat of the motor controller, and the motor is dissipated when the air flows through the surface of the motor through the air duct structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of cleaning appliances, in particular to a brushless cleaning machine. Background Art

[0002] The brushless motor pump cleaning machines currently sold on the market are gradually recognized by the market due to their advantages of low noise, long life and high efficiency. However, the heat dissipation structure of the controller of the cleaning machine generally has the disadvantages of poor heat dissipation effect and short service life, which not only reduces the service life of the brushless controller, but also is not conducive to the promotion and application of brushless cleaning machines in the market. Therefore, technical personnel in this field are committed to developing a brushless cleaning machine that not only has good heat dissipation but also has long-lasting use, so as to provide users with better product selection and usage experience. Utility Model Content

[0003] The utility model aims to provide a brushless cleaning machine which can overcome the shortcomings of the prior art such as complex structure, poor heat dissipation effect and short service life.

[0004] In order to achieve the above-mentioned technical objectives, the utility model provides a brushless cleaning machine, comprising a motor, a pump transmission-connected to the motor, and a motor controller electrically connected to the motor for controlling the operation of the motor, and also comprising a fan blade transmission-connected to the motor, and a shell accommodating the motor and the fan blade; the motor controller comprises a controller box connected to the shell, the controller box is provided with a first air inlet, and the controller box and the shell form an air duct structure that connects the controller box and the shell to each other; when the motor drives the pump to perform a cleaning function, it simultaneously drives the fan blade to rotate to draw external air, so that the air enters the controller box through the first air inlet to dissipate the heat of the motor controller, and dissipates the heat of the motor when flowing through the surface of the motor through the air duct structure.

[0005] Preferably, the air duct structure includes a first air duct extending in a direction parallel to the length direction of the rotating shaft of the motor, and a second air duct opposite to the opening of the first air duct.

[0006] Preferably, the shell includes an upper shell and a lower shell connected to the upper shell, the upper shell and the controller box form the first air duct, and the lower shell and the controller box form the second air duct.

[0007] Preferably, the width of the second air duct is greater than the width of the first air duct.

[0008] Preferably, a heat sink is further included which is connected between the housing and the controller box.

[0009] Preferably, the radiator has a second air inlet adjacent to the first air inlet.

[0010] Preferably, the contact area between the heat dissipation surface of the radiator and the housing is greater than half of the area of ​​the heat dissipation surface.

[0011] Preferably, the fan blade is mounted on one end of the motor close to the radiator.

[0012] Preferably, the motor controller further comprises a PCB board mounted in the controller box, and an electronic device embedded in the PCB board and electrically connected to the PCB board.

[0013] Preferably, the motor controller further comprises a bracket connected to the controller box and used for fixing the PCB board.

[0014] By adopting the above technical solution, the utility model has the following beneficial effects:

[0015] The utility model discloses a brushless cleaning machine, comprising a motor, a pump connected to the motor, and a motor controller electrically connected to the motor for controlling the operation of the motor, and also comprising a fan connected to the motor, and a shell for accommodating the motor and the fan; the motor controller comprises a controller box connected to the shell, the controller box is provided with a first air inlet, and the controller box and the shell form an air duct structure that connects the controller box and the shell. In this way, when the motor drives the pump to perform the cleaning function, the fan blade is driven to rotate to extract external air at the same time, so that the air enters the controller box through the first air inlet to dissipate the heat of the motor controller, and dissipates the heat of the motor when it flows through the surface of the motor through the air duct structure. Compared with the prior art, the utility model can effectively solve the problems of poor heat dissipation and short service life of the motor controller due to poor natural convection by arranging a heat dissipation air duct on the controller box and the shell, which is beneficial to prevent the accumulation of temperature in the controller box, and better ensure that the operating temperature, input and output power of the PCB board are within a reasonable range. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the assembly structure of a brushless cleaning machine provided by an embodiment of the utility model at a first viewing angle;

[0018] Figure 2 for Figure 1 The schematic diagram of the exploded structure of the brushless cleaning machine shown in the first perspective;

[0019] Figure 3 for Figure 1 The brushless cleaning machine shown is a schematic diagram of the exploded structure at a second viewing angle.

[0020] Description of reference numerals:

[0021] 1. Motor; 2. Fan blades; 3. Pump; 4. Housing; 5. Motor controller; 6. Radiator;

[0022] 41. upper shell; 42. lower shell;

[0023] 411, first extension portion; 421, second extension portion;

[0024] 45. Air duct structure; 45a. First air duct; 45b. Second air duct;

[0025] 51. PCB board; 52. electronic components; 53. controller box; 54. bracket;

[0026] 531, first air inlet; 532, first protrusion; 533, second protrusion;

[0027] 61. Second air inlet. DETAILED DESCRIPTION

[0028] The following will describe in detail a specific embodiment of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the description of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0031] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0032] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0033] A cleaning machine, also known as a cleaning device, is usually used to provide a continuous flow of fluid at an increased pressure to a working surface or object to clean the working surface or object, remove dirt, and wash away dirt, thereby achieving the purpose of cleaning the surface of the object. Prior art pressure cleaning machines usually include a controller for controlling the operation of a motor to drive a pump to generate pressurized fluid, and a radiator for ensuring stable operation of the cleaning machine. However, when the motor is running under the control of the controller, a large amount of heat is generated, and when the output power of the cleaning machine is large, the electronic components in the controller will also generate a large amount of heat, so that the heat dissipation effect of the above-mentioned radiator cannot meet the expected requirements.

[0034] To extend the life of the cleaning machine and improve the user experience, please refer to Figure 1 , Figure 2 As shown, an embodiment of the utility model provides a brushless cleaning machine, which includes a motor 1 for providing power, a pump 3 drivingly connected to the motor 1 for pressurizing an input fluid to output a pressurized fluid, and a motor controller 5 electrically connected to the motor 1 for controlling the operation of the motor 1. It should be noted that since a brushless motor that drives a rotor to rotate by magnetic field induction has the advantages of low noise, long life, and high efficiency, specifically, the motor 1 may refer to a brushless motor or a power part without carbon brushes for commutation.

[0035] In this embodiment, in order to improve the heat dissipation of the brushless cleaning machine, the brushless cleaning machine also includes a fan blade 2 that is transmission-connected to the motor 1, and a shell 4 that accommodates the motor 1 and the fan blade 2, wherein the fan blade 2 and the pump 3 are respectively transmission-connected to the two ends of the motor 1, and the shell 4 is fixedly installed on the periphery of the motor 1 and the fan blade 2 to form a dust-proof and anti-collision protective structure, and the motor controller 5 is fixedly connected to the right end of the shell 4.

[0036] It should be noted that the motor controller 5 includes a controller box 53 connected to the housing 4. In order to improve the heat dissipation in the controller box 53, the controller box 53 is provided with a first air inlet 531, and an air duct structure 45 is formed between the controller box 53 and the housing 4 to connect the controller box 53 and the housing 4. In some embodiments, the number of the first air inlets 531 can be multiple. In this embodiment, the number of the first air inlets 531 is twelve, and the twelve first air inlets 531 are symmetrically arranged on the side walls of the controller box 53.

[0037] Please also read Figure 3 As shown, the air duct structure 45 includes a first air duct 45a and a second air duct 45b, wherein the first air duct 45a is convexly sloped, arranged at the top of the controller box 53 and the housing 4, and extends in a direction parallel to the length direction of the rotating shaft of the motor 1, and the second air duct 45b is also convexly sloped, arranged at the bottom of the controller box 53 and the housing 4, and the opening is opposite to the opening of the first air duct 45a. In some embodiments, the number of the first air duct 45a can be multiple. In this embodiment, the number of the first air duct 45a is two, and the two first air ducts 45a are both arranged at the middle of the top of the controller box 53.

[0038] In this embodiment, for the sake of ease of assembly, the housing 4 includes an upper housing 41 and a lower housing 42 connected to the upper housing 41, wherein the upper housing 41 is in an arc-shaped cover shape and is installed on the upper half of the motor 1 and the fan blade 2, and the lower housing 42 is also in an arc-shaped cover shape and is installed on the lower half of the motor 1 and the fan blade 2. It should be noted that, for the sake of improving the convection between the gas in the controller box 53 and the natural environment, a first extension portion 411 is formed on the top of the upper housing 41, and a second extension portion 421 is formed on the bottom of the lower housing 42. Accordingly, a first protrusion 532 adapted to the first extension portion 411 is formed on the top of the controller box 53, and a second protrusion 533 adapted to the second extension portion 421 is formed on the bottom of the controller box 53. In this way, when the first extension portion 411 is connected to the first protrusion 532, the first extension portion 411 and the first protrusion 532 together enclose the above-mentioned first air duct 45a; when the second extension portion 421 is connected to the second protrusion 533, the second extension portion 421 and the second protrusion 533 together enclose the above-mentioned second air duct 45b, so that the shell 4 and the controller box 53 are interconnected to avoid the accumulation of hot air in the controller box 53.

[0039] When the motor 1 drives the pump 3 to perform the cleaning function, it also drives the fan blade 2 to rotate to extract external air, so that the air enters the controller box 53 through the first air inlet 531 under the action of negative pressure to dissipate the heat of the motor controller 5, and dissipates the heat of the motor 1 when it flows through the surface of the motor 1 through the first air duct 45a and the second air duct 45b of the air duct structure 45. After simulation analysis, when the speed of the fan blade 2 is 2700 / rpm, the gas flow speed in the controller box 53 before the improvement is 0.14m / s, and the gas flow speed after the improvement is 1.5m / s. Compared with the prior art, the utility model improves the gas convection in the controller box 53, which is beneficial to reduce the overall temperature of the motor controller 5 when it is working, thereby improving the performance and user experience of the brushless cleaning machine.

[0040] Furthermore, the brushless cleaning machine also includes a radiator 6 fixedly connected between the shell 4 and the controller box 53. The radiator 6 is in a rectangular configuration and has a plurality of relative heat dissipation surfaces on one side. The heat dissipation surfaces are adjacent to the fan blades 2 and abut against the upper shell 41 and the lower shell 42.

[0041] In order to ensure the convection effect of the gas in the shell 4 and the controller box 53, a plurality of second air inlets 61 are formed at both ends of the radiator 6. The plurality of second air inlets 61 are adjacent to the first air inlet 531 in the horizontal direction, so that the sum of the air intake areas of the first air inlet 531 and the second air inlet 61 is equivalent to the air intake area of ​​the fan blade 2, so as to ensure that a sufficient amount of air is inhaled from the outside.

[0042] In some embodiments, in order to increase the contact area between the radiator 6 and the air, the coverage area of ​​the upper shell 41 and the lower shell 42 of the shell 4 on the heat dissipation surface of the radiator 6 is greater than half of the area of ​​the heat dissipation surface to improve the heat dissipation efficiency of the radiator 6.

[0043] In this embodiment, the motor controller 5 further includes a PCB board 51 installed in a controller box 53, and an electronic device 52 embedded in the PCB board 51 and electrically connected to the PCB board 51, wherein the PCB board 51 is fixedly connected to the right side of the heat sink 6. The electronic device 52 mentioned here may refer to a power semiconductor device or a part thereof, and more specifically, the electronic device 52 includes a rectifier bridge, an IGBT (insulated gate bipolar transistor) and an IPM (intelligent power module).

[0044] In some embodiments, since the power module that generates more heat on the electronic device 52 is usually arranged below the PCB board 51, preferably, the width of the second air duct 45b is greater than the width of the first air duct 45a. In this way, the heat or hot air generated by the electronic device 52 will be sucked into the fan blade 2 through the second air duct 45b, and at the same time, the external air with the same ambient temperature enters the controller box 53 through the first air inlet 531, and the gas in the controller box 53 can flow quickly for heat exchange, thereby preventing the temperature in the controller box 53 from rising due to the accumulation of hot air.

[0045] In this embodiment, the motor controller 5 also includes a bracket 54 connected to the controller box 53 for fixing the PCB board 51. The bracket 54 is frame-shaped and connected to the outer periphery of the PCB board 51 so that the PCB board 51 can be stably connected to the controller box 53 by fastening screws.

[0046] Compared with the prior art, the utility model has the following beneficial effects:

[0047] The utility model discloses a brushless cleaning machine, comprising a motor 1, a pump 3 connected to the motor 1 in a transmission manner, and a motor controller 5 electrically connected to the motor 1 for controlling the operation of the motor 1, and also comprising a fan blade 2 connected to the motor 1 in a transmission manner, and a housing 4 for accommodating the motor 1 and the fan blade 2; the motor controller 5 comprises a controller box 53 connected to the housing 4, the controller box 53 is provided with a first air inlet 531, and the controller box 53 and the housing 4 form an air duct structure 45 that interconnects the controller box 53 and the housing 4. In this way, when the motor 1 drives the pump 3 to perform a cleaning function, the fan blade 2 is driven to rotate at the same time to extract external air, so that the air enters the controller box 53 through the first air inlet 531 to dissipate heat for the motor controller 5, and dissipates heat for the motor 1 when flowing through the surface of the motor 1 through the air duct structure 45. Compared with the prior art, the utility model can effectively solve the problems of poor heat dissipation and short service life of the motor controller 5 due to poor natural convection by setting a heat dissipation duct structure 45 on the controller box 53 and the shell 4, which is beneficial to prevent the accumulation and increase of temperature in the controller box 53, and better ensure that the operating temperature, input and output power of the PCB board 51 are within a reasonable range.

[0048] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the attached claims.

Claims

1. A brushless cleaning machine, characterized in that: The invention comprises a motor (1), a pump (3) drivingly connected to the motor (1), and a motor controller (5) electrically connected to the motor (1) and used to control the operation of the motor (1), and also comprises a fan blade (2) drivingly connected to the motor (1), and a housing (4) accommodating the motor (1) and the fan blade (2); the motor controller (5) comprises a controller box (53) connected to the housing (4), the controller box (53) being provided with a first air inlet (531), the controller box (53) ) and the housing (4) form an air duct structure (45) that interconnects the controller box (53) and the housing (4); when the motor (1) drives the pump (3) to perform a cleaning function, it simultaneously drives the fan blade (2) to rotate to draw in external air, so that the air enters the controller box (53) through the first air inlet (531) to dissipate heat for the motor controller (5), and dissipates heat for the motor (1) when flowing through the surface of the motor (1) through the air duct structure (45).

2. The brushless cleaning machine according to claim 1, characterized in that: The air duct structure (45) includes a first air duct (45a) extending in a direction parallel to the length direction of the rotating shaft of the motor (1), and a second air duct (45b) opposite to the opening of the first air duct (45a).

3. The brushless cleaning machine according to claim 2, characterized in that: The shell (4) comprises an upper shell (41) and a lower shell (42) connected to the upper shell (41); the upper shell (41) and the controller box (53) form the first air duct (45a); and the lower shell (42) and the controller box (53) form the second air duct (45b).

4. The brushless cleaning machine according to claim 3, characterized in that: The width of the second air duct (45b) is greater than the width of the first air duct (45a).

5. The brushless cleaning machine according to claim 1, characterized in that: It also includes a heat sink (6) connected between the housing (4) and the controller box (53).

6. The brushless cleaning machine according to claim 5, characterized in that: The radiator (6) has a second air inlet (61) adjacent to the first air inlet (531).

7. The brushless cleaning machine according to claim 6, characterized in that: The contact area between the heat dissipation surface of the heat sink (6) and the housing (4) is greater than half the area of ​​the heat dissipation surface.

8. The brushless cleaning machine according to claim 7, characterized in that: The fan blade (2) is mounted on one end of the motor (1) close to the radiator (6).

9. The brushless cleaning machine according to claim 1, characterized in that: The motor controller (5) further comprises a PCB board (51) mounted in the controller box (53), and an electronic device (52) embedded in the PCB board (51) and electrically connected to the PCB board (51).

10. The brushless cleaning machine according to claim 9, characterized in that: The motor controller (5) further comprises a bracket (54) connected to the controller box (53) and used for fixing the PCB board (51).

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