A heat dissipation structure of a cleaning machine

Abstract

The utility model relates to the technical field of cleaning machine, concretely is a kind of heat dissipation structure of cleaning machine.It solves the problem that the heat of motor and frequency converter is accumulated, heat dissipation efficiency is low, equipment stability and life are influenced due to compact structure of existing cleaning machine.The heat dissipation structure includes cleaning machine shell, the motor shell and fixed frequency converter in it, and the frequency conversion heat dissipation fin is protruded under frequency converter base, the motor shell is equipped with the motor heat dissipation fin of opposite position, and heat dissipation gap is formed between the two;Fan shell is fixed on the motor shell, its outer periphery is equipped with drainage heat dissipation fin, shell is opened with air hole in corresponding position, and drainage heat dissipation fin extends to near air hole and constitutes directional drainage channel.The utility model realizes the efficient heat dissipation of two heat sources by constructing cooperative heat dissipation channel and directional airflow discharge path, and simultaneously reduces operating noise.

Description

Technical Field

[0001] This utility model relates to the field of cleaning machine technology, specifically to a heat dissipation structure for a cleaning machine. Background Technology

[0002] Household mini cleaning machines, as portable and efficient cleaning devices, are widely used in home and vehicle washing, as well as small-scale outdoor cleaning scenarios. With increasing user demands for lightweight, portable, and easy-to-operate equipment, cleaning machines are evolving towards more compact structures and higher integration. Under this trend, the motor and frequency converter, as core power and control components, are typically integrated into a small machine body to achieve a streamlined overall structure.

[0003] However, the compact design also brings significant heat dissipation challenges. Motors generate a large amount of heat when running at high speeds, and frequency converters also experience significant energy losses during the adjustment of motor speed and power, which are released as heat. In a limited space, insufficient heat dissipation design can easily lead to heat accumulation, causing the motor and frequency converter temperatures to rise continuously. Prolonged high-temperature operation not only reduces motor efficiency and affects output stability but may also accelerate the aging of electronic components, potentially causing equipment failure or shortening the overall lifespan of the machine. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a heat dissipation structure for a cleaning machine. The technical problem this invention aims to solve is how to improve the internal heat dissipation efficiency of the cleaning machine, ensuring the stability and reliability of the equipment during extended operation.

[0005] The objective of this utility model can be achieved through the following technical solution: A heat dissipation structure for a cleaning machine includes a cleaning machine housing, a motor housing fixedly disposed inside the cleaning machine housing, and a frequency converter fixedly connected to the motor housing. The frequency converter includes a frequency converter base, and the lower end of the frequency converter base protrudes from the motor housing with several frequency converter heat sinks and two frequency converter fixing plates. The motor housing is provided with motor heat sinks opposite to the positions of the frequency converter heat sinks, and motor fixing plates for connecting to the frequency converter fixing plates. The motor fixing plates and the corresponding frequency converter fixing plates are fixedly connected by fasteners. A fan housing is also fixedly connected to the motor housing, and a fan impeller is disposed inside the fan housing. The outer periphery of the fan housing is provided with heat-draining fins corresponding to the positions of the motor heat sinks. A rotor, stator, and shaft are disposed inside the motor housing. A high-pressure pump is also fixedly connected to the motor housing, and the shaft in the motor drives the high-pressure pump. The end of the shaft opposite to the high-pressure pump extends out of the motor housing and is fixedly connected to the fan impeller, which dissipates the heat inside the cleaning machine housing to the outside. By installing a frequency converter heat sink at the bottom of the frequency converter and a motor heat sink on the motor housing, the two are positioned opposite each other to form a heat dissipation channel, which accelerates the dissipation of heat generated by the motor and the frequency converter.

[0006] Furthermore, the cleaning machine housing has several ventilation holes at positions corresponding to the fan housing, and these ventilation holes are connected to the airflow channel formed by the heat sink. The heat sink and ventilation holes of the fan housing form a directional airflow channel, drawing out internal hot air, reducing airflow turbulence, and lowering operating noise.

[0007] Furthermore, the height of the frequency converter mounting plate is higher than that of the frequency converter heat sink, and the height of the motor mounting plate is higher than that of the motor heat sink, thereby forming a heat dissipation gap between the frequency converter heat sink and the motor heat sink to allow airflow. This heat dissipation gap is connected to the airflow channel. The presence of this heat dissipation gap between the frequency converter heat sink and the motor heat sink, and its connection to the airflow channel, prevents airflow blockage and ensures that heat is continuously dissipated.

[0008] Furthermore, the fan housing has a flow-guiding slope between its outer peripheral surface and outer end surface, and the heat sink extends from the outer peripheral surface to the flow-guiding slope.

[0009] Furthermore, the outer end face of the fan housing is provided with several air vents, and the lower end of the heat sink is infinitely close to the air vents.

[0010] Furthermore, the heat sink extends toward the ventilation hole to form a heat dissipation protrusion, and the end of the heat dissipation protrusion is close to the ventilation hole.

[0011] Compared with existing technologies, the technical effects of this utility model are as follows: First, by aligning and spacing the inverter heat sink at the bottom of the inverter with the motor heat sink on the motor housing, a low-resistance airflow channel is formed. When the fan is running, the airflow can smoothly pass through this channel, simultaneously carrying away heat from the motor and inverter heat sinks, thereby achieving efficient and coordinated heat dissipation of the two core heat sources and preventing heat accumulation in the compact space. Second, by extending the heat sink of the fan housing and aligning it with the ventilation holes of the housing, a directional airflow channel is constructed from the internal heat dissipation gap and drainage channel directly to the outside, allowing heat to be carried away quickly and orderly from the heat-generating area. This not only effectively reduces the internal ambient temperature but also reduces fan operating noise by reducing airflow eddies and turbulence, achieving a combined improvement in heat dissipation efficiency and noise reduction. Attached Figure Description

[0012] Figure 1 This is a perspective view of the cleaning machine housing of this utility model.

[0013] Figure 2 This is a front view of the casing of the cleaning machine of this utility model.

[0014] Figure 3 This is a three-dimensional view of the inverter base of this utility model.

[0015] Figure 4 This is a perspective view of the fan housing of this utility model.

[0016] Figure 5 This is a perspective view of the utility model.

[0017] Figure 6 This is a cross-sectional view of the present invention.

[0018] Drawing number markings: 1. Cleaning machine housing; 11. Ventilation hole; 2. Motor housing; 21. Motor heat sink; 22. Motor mounting plate; 3. Inverter; 31. Inverter base; 32. Inverter heat sink; 33. Inverter mounting plate; 4. Fan housing; 41. Fan impeller; 42. Outer peripheral surface; 43. Outer end face; 44. Guide slope; 45. Airflow fin; 46. Heat dissipation protrusion; 47. Air outlet; 5. Fixing component; 6. Heat dissipation gap. Detailed Implementation

[0019] 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.

[0020] It should be noted that the descriptions of "up", "down", "left", "right", "top", "bottom", etc. in this utility model are defined based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] according to Figures 1 to 6 As shown, the present invention provides a heat dissipation structure for a cleaning machine. Its core lies in optimizing the heat sink layout of the heat-generating components—the motor and the frequency converter—and coordinating it with the fan and air duct design to form a highly efficient, low-noise directional heat dissipation airflow path. The heat dissipation structure mainly includes a cleaning machine housing 1, a motor housing 2, a frequency converter 3, and a fan housing 4.

[0022] The cleaning machine housing 1 forms the overall outer casing of the equipment. Several ventilation holes 11 are provided on the cleaning machine housing 1 at the location corresponding to the fan housing 4. These ventilation holes 11 are the final outlets for the exhaust of internal hot air. An air inlet is provided at the opposite end of the cleaning machine housing 1 opposite to the ventilation holes 11.

[0023] The motor housing 2 is fixedly disposed inside the cleaning machine housing 1, and houses the motor stator, rotor, and shaft. One end of the motor shaft is connected to a high-pressure pump to provide power, while the other end extends out of the motor housing 2. Several outwardly protruding motor heat sinks 21 are provided on the outer surface of the motor housing 2. Simultaneously, at least two motor mounting plates 22 are fixedly disposed on the motor housing 2 for connection and fixation to the frequency converter 3. Preferably, the height of the motor mounting plates 22 is designed to be higher than the upper surface of the motor heat sinks 21.

[0024] The frequency converter 3, serving as the control core of the motor, includes a frequency converter base 31. The lower end face of the frequency converter base 31, facing the motor housing 2, protrudes with several frequency converter heat sinks 32 and at least two frequency converter fixing plates 33. The positions of the frequency converter heat sinks 32 are opposite to the positions of the motor heat sinks 21 on the motor housing 2. The frequency converter fixing plates 33 correspond to the positions of the motor fixing plates 22. During installation, screws or other fasteners 5 are used to pass through the mounting holes on the frequency converter fixing plates 33 and the motor fixing plates 22 to securely connect the frequency converter 3 to the motor housing 2. Importantly, the height of the frequency converter fixing plates 33 is set higher than the lower surface of the frequency converter heat sinks 32. Therefore, after the frequency converter 3 is installed, the frequency converter heat sinks 32 and the motor heat sinks 21 on the motor housing 2 are not tightly fitted, but rather a heat dissipation gap 6 is maintained for airflow. The width of this gap is determined by the combined height difference between the frequency converter fixing plates 33 and the motor fixing plates 22.

[0025] The fan housing 4 is fixedly connected to the motor housing 2, and houses the fan impeller 41 inside. The extended end of the motor shaft is fixedly connected to the fan impeller 41, so that the motor can synchronously drive the fan impeller 41 to rotate during operation. The fan housing 4 has a generally cylindrical outer peripheral surface 42 and an outer end surface 43 facing the ventilation hole 11 of the cleaning machine housing 1. The outer peripheral surface 42 and the outer end surface 43 are smoothly transitioned by a guide slope 44. Several heat sink fins 45 are integrally formed on the outer peripheral surface 42 and the guide slope 44 of the fan housing 4. These heat sink fins 45 extend along the expected direction of airflow. Several air passages 47 are also provided on the outer end surface 43 of the fan housing 4 to assist airflow passage. The lower ends of the heat sink fins 45 are very close to these air passages 47 to ensure that the airflow can be effectively guided. The heat sink fins 45 have heat dissipation protrusions 46, the ends of which are very close to or directly opposite the ventilation hole 11.

[0026] Thus, the airflow is first drawn in and flows through the heat dissipation gap 6 formed by the opposing frequency converter heat sink 32 and motor heat sink 21. During this process, the airflow undergoes sufficient heat exchange with the two sets of heat sinks, quickly carrying away the heat generated by the motor and frequency converter. Subsequently, this heated airflow is propelled by the rotational force of the fan impeller 41 and enters the flow channel guided by the flow-guiding heat sink 45. The flow-guiding heat sink 45 regulates and guides the airflow, causing it to flow smoothly along the guide slope 44 towards the ventilation hole 11 on the cleaning machine casing 1, and finally expelling the heat outside the machine. Since the heat dissipation gap 6 is directly connected to the flow channel, and the extension direction of the flow-guiding heat sink 45 is precisely aligned with the ventilation hole 11, a low-resistance, directional airflow path is formed. This greatly reduces the turbulence and eddies of the internal airflow, not only improving the heat dissipation efficiency and ensuring that heat is continuously and quickly discharged, but also effectively reducing the fan operating noise caused by turbulence.

[0027] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection defined by the claims of the present utility model.

Claims

1. A heat dissipation structure for a cleaning machine, comprising a cleaning machine housing (1), wherein a motor housing (2) is fixedly disposed inside the cleaning machine housing (1), and a frequency converter (3) is fixedly connected to the motor housing (2), characterized in that: The inverter (3) includes an inverter base (31), the lower end of which protrudes from the motor housing (2) and is provided with a plurality of inverter heat sinks (32) and two inverter fixing plates (33); the motor housing (2) is provided with a motor heat sink (21) opposite to the inverter heat sink (32) and a motor fixing plate (22) for connecting with the inverter fixing plate (33); the motor fixing plate (22) and the corresponding inverter fixing plate (33) are fixedly connected by a fixing member (5); a fan housing (4) is also fixedly connected to the motor housing (2), a fan impeller (41) is provided inside the fan housing (4), and a flow-guiding heat sink (45) corresponding to the position of the motor heat sink (21) is provided on the outer periphery of the fan housing (4).

2. The heat dissipation structure of a cleaning machine according to claim 1, characterized in that: The cleaning machine housing (1) has several ventilation holes (11) at a position corresponding to the fan housing (4), and the ventilation holes (11) are connected to the flow channel formed between the flow-guiding heat sink (45).

3. The heat dissipation structure of a cleaning machine according to claim 2, characterized in that: The height of the variable frequency fixing plate (33) is higher than that of the variable frequency heat sink (32), and the height of the motor fixing plate (22) is higher than that of the motor heat sink (21), thereby forming a heat dissipation gap (6) between the variable frequency heat sink (32) and the motor heat sink (21) for airflow to pass through. The heat dissipation gap (6) is connected to the drainage channel.

4. The heat dissipation structure of a cleaning machine according to claim 2 or 3, characterized in that: The fan housing (4) has a flow guiding slope (44) between its outer peripheral surface (42) and outer end surface (43), and the heat sink (45) extends from the outer peripheral surface (42) to the flow guiding slope (44).

5. The heat dissipation structure of a cleaning machine according to claim 4, characterized in that: The outer end face (43) of the fan housing (4) is provided with a plurality of air passages (47), and the lower end of the heat sink (45) is infinitely close to the air passages (47).

6. The heat dissipation structure of a cleaning machine according to claim 5, characterized in that: The heat sink (45) extends toward the ventilation hole (11) to form a heat dissipation protrusion (46), and the end of the heat dissipation protrusion (46) is close to the ventilation hole (11).

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