A cleaning machine

Abstract

This utility model provides a cleaning machine, belonging to the field of mechanical technology. It solves the problem of how to improve the heat dissipation performance of the control module. The cleaning machine includes a housing with an air inlet and an air outlet. A motor, a pump body, and a control module are fixed inside the housing. One end of the motor is connected and fixed to the pump body, and the other end is rotatably connected to a fan. A cylindrical air guide shroud is fixed inside the housing and outside the motor. The air guide shroud extends through both ends, with its air outlet facing the pump body and communicating with the air outlet. A cover-shaped air shroud is also fixed inside the housing, covering the air inlet end of the air guide shroud. An air passage gap is formed between the inner wall of the air shroud cover and the outer wall of the air guide shroud, connecting the air inlet and the air inlet end of the air guide shroud. The control module is fixed to the inner wall of the air shroud cover and is positioned opposite the air inlet end of the air guide shroud. This cleaning machine can improve the heat dissipation performance of the control module.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a cleaning machine. Background Technology

[0002] Cleaning machines are very common cleaning equipment in existing technology. For example, a permanent magnet brushless cleaning machine and heat dissipation structure disclosed in Chinese Patent (Authorization Announcement No.: CN215835263U) has a pump body connected to a motor. A circuit board heat sink is provided on one side of the motor. The circuit board heat sink is equipped with a heat-generating electronic component and a heat sink. A cooling fan is provided between the circuit board heat sink and the motor. The cooling fan is connected to the main shaft of the motor. When the cooling fan rotates, it will cause the airflow inside the cleaning machine to flow from top to bottom and outward. The cold air outside the cleaning machine casing will be drawn into the cleaning machine casing by the cooling fan and will pass through the circuit board heat sink and the motor in sequence and be discharged from the bottom of the cleaning machine casing, thereby dissipating heat from the motor and heat-generating components inside the cleaning machine.

[0003] As can be seen from the above structure, heat dissipation performance is a crucial aspect in the current cleaning machine industry, and air cooling is one of the more mature heat dissipation methods. The heat dissipation method is also specifically described in paragraph 0032 of the prior art. However, this structure still has significant shortcomings. Specifically, referring to the appendix of the prior art… Figure 3 Even though the casing integrates a cooling fan driven by a DC motor, in actual operation, the cool airflow flows directly down the inner wall of the casing after passing through the first ventilation hole due to the action of the cooling fan. The heat trapped inside the casing needs to be drawn out by creating a negative pressure at the second ventilation hole through the cooperation of the cooling fan and the baffle.

[0004] But from Figure 4 As can be seen, there are no additional through holes on the cover that connect to its internal cavity. The internal pressure and external pressure are balanced only by the gap between the cover and the controller. Therefore, even though the cooling fan blades rotate and airflow is formed at the two ventilation holes, the heat inside the cover cannot be effectively absorbed, resulting in poor heat dissipation performance. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a cleaning machine. The technical problem this invention aims to solve is: how to improve the heat dissipation performance of the control module.

[0006] The objective of this utility model can be achieved through the following technical solution: A cleaning machine includes a housing with an air inlet and an air outlet. A motor, a pump body, and a control module are fixed inside the housing. One end of the motor is connected and fixed to the pump body, and the other end is rotatably connected to a fan. The characteristic is that a cylindrical air guide shroud is fixed inside the housing and outside the motor. The air guide shroud extends through both ends, with the air outlet facing the pump body and communicating with the air outlet. A cover-shaped air cover is also fixed inside the housing and covers the air inlet end of the air guide shroud. An air passage gap is formed between the inner wall of the air cover and the outer wall of the air guide shroud, communicating with the air inlet and the air inlet end of the air guide shroud. The control module is fixed on the inner wall of the air cover and is arranged opposite to the air inlet end of the air guide shroud.

[0007] The working principle of this application is as follows: An electric motor is used as the drive source to rotate the fan, creating a negative pressure inside the casing. Cold air is drawn into the casing through the air inlet. During this process, due to the cooperation of the air guide shroud and the shroud cover, the cold air, in its circulating flow, can enter through the opening of the shroud cover and into the air gap formed between the shroud cover and the outer wall of the air guide shroud. Then, guided by the fan, the cold airflow enters from one end of the air guide shroud and exits from the other end. During this process, because the control module is installed on the inner wall of the shroud cover and faces the air inlet end of the air guide shroud, the cold airflow can brush against the air guide shroud and the shroud cover. On the surface of the control module, the airflow is used to fully exchange the heat generated by the control module during operation, thereby ensuring the heat dissipation performance of the control module. Secondly, when the cold airflow is output from the air outlet of the air guide shroud, since the pump body is directly facing the air outlet of the air guide shroud, the airflow can blow onto the surface of the pump body, thereby achieving the effect of cooling the pump body. Furthermore, with the continuous input of cold airflow, the airflow output from the air outlet of the air guide shroud can be smoothly discharged to the outside through the air outlet holes opened on the outer shell, thereby ensuring the smooth flow of cold air and thus ensuring the heat dissipation effect of the control module and the pump body.

[0008] In the aforementioned cleaning machine, the fan cover is eccentrically positioned relative to the drive shaft of the motor. It is worth noting that the control module proposed in this application is prior art, specifically comprising a circuit board and numerous components integrated on the circuit board. This application achieves this by eccentrically positioning the fan cover, thereby ensuring that the width of the resulting excessive gap remains inconsistent in the circumferential direction. Specifically, in the circumferential direction, one region of the excessive gap has a larger width, while another region has a smaller width, thus ensuring that the control module can be effectively accommodated without affecting airflow.

[0009] In the aforementioned cleaning machine, the inner wall of the air hood cover has a connecting post along the axial direction of the motor's drive shaft, and the free end of the connecting post has a slot. The outer wall of the air inlet end of the air guide cover has a plug-in post along the axial direction of the motor's drive shaft, and the plug-in post is snapped into the slot. This design allows the air hood cover, along with the control module fixed to the inner wall of the air hood cover, to quickly and easily position itself with the air guide cover, thus ensuring convenient installation.

[0010] In the aforementioned cleaning machine, a stepped hole is provided on the outer wall of the air hood cover, extending axially through the bottom wall of the slot along the connecting column. A screw, which is threaded into the connecting column, is provided in the stepped hole. This further enhances the secure connection between the air hood cover and the air guide cover.

[0011] In the aforementioned cleaning machine, the outer casing includes a front cover and a rear cover. Several air inlets and outlets are located on the rear cover. Several air inlets are positioned near the air hood cover, and several air outlets are positioned near the air outlet end of the air guide hood. A modular, assembled casing structure is adopted, with both air inlets and outlets located on the side wall of the rear cover. This eliminates the need for openings at the front and rear ends of the formed outer casing, ensuring that external cold airflow can smoothly enter the casing, while ensuring that the airflow after heat exchange can smoothly exit the casing through the outlets.

[0012] Compared with existing technologies, this cleaning machine has the following advantages:

[0013] By combining the outer casing, air guide shroud, and air cover, a flow channel for cold air to circulate is formed inside the cleaning machine. In this case, by integrating the motor connected to the fan into the air cover and installing the control module in the air cover, the cold airflow can pass through the air gap before entering from the air inlet of the air guide shroud and then blow over the control module, thereby achieving sufficient cooling of the control module. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the cleaning machine.

[0015] Figure 2 This is a structural schematic diagram of the cleaning machine from another perspective.

[0016] Figure 3 This is a schematic diagram of the structure of this cleaning machine after the front cover is removed.

[0017] Figure 4 This is a sectional view of the air cover, air guide cover, motor, and pump body.

[0018] Figure 5 This is a schematic diagram of the air guide cover.

[0019] Figure 6 This is a schematic diagram of the windshield cover.

[0020] Figure 7 This is a structural schematic diagram of the windshield cover from another perspective, along with a magnified view of its portion.

[0021] In the diagram, 1. Outer shell; 11. Air inlet; 12. Air outlet; 13. Motor; 131. Fan; 14. Pump body; 15. Control module; 16. Front cover; 17. Rear cover; 2. Air guide cover; 21. Plug-in post; 3. Air cover; 31. Connecting post; 311. Slot; 32. Step hole; 4. Air passage gap. Detailed Implementation

[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] like Figure 1-4 As shown, this cleaning machine includes a housing 1, specifically comprising a front cover 16 and a rear cover 17. These two parts are joined together by snap-fit ​​mechanisms to form a complete housing 1, and are subsequently secured with screws, creating a cavity within the housing 1 for installing various components. In addition, the cleaning machine includes a pump body 14, a motor 13, and a control module 15. The pump body 14 is fixed to one end of the motor 13, and the other end of the motor 13 is equipped with a fan 131 fixedly connected to the motor 13's shaft. Figure 5 and Figure 6 The outer casing 1 is also provided with a wind cover 3 and a cylindrical air guide 2. The two ends of the air guide 2 are through-hole. The motor 13 and the fan are fixed inside the air guide 2. The pump body 14 is set directly opposite the air outlet of the air guide 2. The wind cover 3 is fixed to the air inlet of the air guide 2, and an air passage gap 4 is formed between the inner circumferential wall of the wind cover 3 and the outer circumferential wall of the air guide 2.

[0024] like Figure 6 As shown, the control module 15 is screwed and locked onto the inner wall of the fan cover 3, so that after the fan cover 3 is fixed to the air guide cover 2, the control module 15 is located in the air inlet gap and the control module 15 is facing the air inlet end of the air guide cover 2.

[0025] Regarding the fixing of the air guide shroud 2 and the air cover 3, specifically, as follows: Figure 6 and Figure 7As shown, two insertion posts 21 are formed on the outer wall of the air inlet end of the air guide hood 2. The two insertion posts 21 are arranged at intervals along the circumference of the air guide hood 2. Two connecting posts 31 are formed on the inner wall of the air cover 3. The positions of the two connecting posts 31 and the two insertion posts 21 are opposite to each other. Each insertion post 21 has a slot 311. When the air cover 3 is fastened to the air inlet end of the air guide hood 2, the two corresponding insertion posts 21 can be engaged in the slots 311, thereby achieving pre-positioning of the air cover 3 and its contents. Based on this, combined with... Figure 7 Two stepped holes 32 are provided on the outer wall of the wind cover 3. The positions of the two stepped holes 32 correspond one-to-one with the positions of the two connecting posts 31 and both are provided through the bottom wall of the corresponding slots 311. Secondly, threaded holes are provided on the free end of each plug post 21. Screws can be installed in the stepped holes 32 and screwed to the plug post 21 to achieve secondary locking of the wind cover 3, ensuring the installation stability of the control module 15. The screws used to lock the wind cover 3 and the air guide cover 2 in this application are not shown in the figure.

[0026] like Figure 2 As shown, air inlets 11 and air outlets 12 are provided on the side wall of the rear cover 17. There are several air inlets 11 and several air outlets 12. The air inlets 11 are located close to the wind cover 3, and the air outlets 12 are located close to the air outlet end of the air guide 2.

[0027] Secondly, a touch control panel and a switch module are also provided on the outer casing 1. The control panel and the switch module are both mounted on the front cover 16 of the outer casing 1. The switch module includes a circuit board, components integrated on the circuit board, and a control knob. The control panel can adopt existing technology, specifically CN215835263U. The control panel and the switch module are connected to the control module 15 through wires.

[0028] Working principle: The operator uses the switch module in conjunction with the control module 15 to run the motor 13 and the pump body 14. During this process, the motor 13 drives the fan 131 to rotate, creating a negative pressure inside the outer casing 1. Air is drawn into the outer casing 1 through the numerous air inlets 11. The cold airflow passes through the air gap 4 and enters from the air inlet end of the air guide shroud 2 after brushing past the control module 15. This ensures the flow of cold air while cooling the control module 15. With the continuous rotation of the fan 131, this part of the airflow continues to flow along the inner wall of the air guide shroud 2 and is discharged from the air outlet end. It acts on the outer surface of the pump body 14 to carry away the heat generated by the pump body 14 during operation. Under the driving force of the subsequent airflow, this part of the airflow that has completed heat exchange is discharged from the numerous air outlets 12, thereby completing the timely and sufficient cooling of the control module 15, the motor 13, and the pump body 14.

[0029] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0030] Although this document frequently uses terms such as outer casing 1, air inlet 11, air outlet 12, motor 13, fan 131, pump body 14, control module 15, front cover 16, rear cover 17, air guide shroud 2, plug-in post 21, fan cover 3, connecting post 31, slot 311, stepped hole 32, and air passage gap 4, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A cleaning machine, comprising a housing (1) having an air inlet (11) and an air outlet (12), wherein a motor (13), a pump body (14), and a control module (15) are fixed inside the housing (1), one end of the motor (13) is fixedly connected to the pump body (14), and the other end is rotatably connected to a fan (131), characterized in that, A cylindrical air guide shroud (2) is fixed inside the outer casing (1) and outside the motor (13). The air guide shroud (2) has two through ends and the air outlet is directly opposite the pump body (14) and connected to the air outlet (12). A cover-shaped air cover (3) is also fixed inside the outer casing (1) and covers the air inlet end of the air guide shroud (2). An air passage gap (4) is formed between the inner wall of the air cover (3) and the outer wall of the air guide shroud (2) to connect the air inlet (11) and the air inlet end of the air guide shroud (2). The control module (15) is fixed on the inner wall of the air cover (3) and is arranged opposite to the air inlet end of the air guide shroud (2).

2. The cleaning machine according to claim 1, characterized in that, The fan cover (3) is eccentrically positioned relative to the drive shaft of the motor (13).

3. The cleaning machine according to claim 1 or 2, characterized in that, The inner wall of the wind cover (3) has a connecting post (31) along the axial direction of the drive shaft of the motor (13). The free end of the connecting post (31) is provided with a slot (311). The outer wall of the air inlet end of the wind guide cover (2) has a plug-in post (21) along the axial direction of the drive shaft of the motor (13). The plug-in post (21) is snapped and fixed in the slot (311).

4. The cleaning machine according to claim 3, characterized in that, The outer wall of the wind cover (3) has a stepped hole (32) that extends through the bottom wall of the slot (311) along the axial direction of the connecting column (31). The stepped hole (32) is provided with a screw that is screwed into the connecting column (31).

5. The cleaning machine according to claim 4, characterized in that, The outer casing (1) includes a front cover (16) and a rear cover (17). There are several air inlets (11) and several air outlets (12) on the rear cover (17). Several air inlets (11) are located near the wind cover (3), and several air outlets (12) are located near the air outlet end of the air guide cover (2).

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