A blower structure for guiding air into an air inlet and dissipating heat from an IPM module

Abstract

The utility model discloses a kind of hair dryer structures of air inlet drainage to IPM module heat dissipation, including the functional assembly of being arranged in hair dryer, the functional assembly includes motor casing, the motor casing is enclosed and is used for installing the containing cavity of motor, the motor casing rear end is equipped with the air inlet of being communicated with containing cavity, front end has the air outlet of being communicated with containing cavity, the motor casing is equipped with and is communicated with containing cavity hollow window, the motor casing is connected with the IPM module for being electrically connected with motor, the IPM module is embedded in hollow window and covers hollow window, the utility model aims at overcoming the deficiency of prior art, provide a kind of hair dryer structure of air inlet drainage to IPM module heat dissipation for improving compactness and heat dissipation performance.

Description

Technical Field

[0001] This utility model specifically relates to a blower structure for heat dissipation of IPM modules by diverting airflow through the air inlet. Background Technology

[0002] As home appliances evolve towards higher power, miniaturization, and intelligence, handheld appliances such as hair dryers place higher demands on the integration and heat dissipation performance of their internal electronic components. The IPM module (Intelligent Power Module), as the core control unit for the drive motor, integrates high-power semiconductor devices such as IGBTs and MOSFETs, as well as drive and protection circuits, generating a significant amount of heat during operation. Poor heat dissipation can easily lead to excessively high module temperatures, affecting performance stability and even triggering overheat protection or component damage, severely restricting the overall reliability and lifespan of the appliance.

[0003] Furthermore, in space-constrained devices like hair dryers, the motor air duct only provides cooling for the motor itself, and its airflow path is usually separate from the control module, failing to effectively utilize the existing high-speed airflow resources. In existing structures, the IPM module is often installed independently outside the air duct, in a relatively enclosed or stagnant air environment, resulting in poor heat dissipation and the formation of "heat accumulation" areas, further exacerbating the thermal management problem.

[0004] This utility model was developed precisely because of the aforementioned shortcomings. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a blower structure for cooling IPM modules by guiding airflow through the air inlet, which improves compactness and heat dissipation performance.

[0006] This utility model is achieved through the following technical solution:

[0007] This utility model provides a hair dryer structure for heat dissipation of an IPM module by air inlet diversion, including functional components disposed inside the hair dryer. The functional components include a motor housing, which forms a cavity for mounting the motor. The rear end of the motor housing has an air inlet communicating with the cavity, and the front end has an air outlet communicating with the cavity. The motor housing has a perforated window communicating with the cavity. An IPM module for electrical connection with the motor is connected to the motor housing. The IPM module is embedded in the perforated window and the perforated window is sealed.

[0008] The air inlet-guided heat dissipation blower structure for the IPM module described above includes an IPM module substrate and functional devices arranged on the substrate. The substrate is covered with a perforated window, and the functional devices are located within a receiving cavity.

[0009] As described above, the air inlet guides the airflow to heat the IPM module. The motor housing is provided with a partition structure located in the receiving cavity. The partition structure divides the receiving cavity into a main channel for placing the motor and an auxiliary channel located on one side of the main channel. The partition structure extends in the front-back direction and divides the air inlet into several main air inlets and auxiliary air inlets.

[0010] As described above, the air inlet guides the airflow to heat the IPM module. The motor housing consists of an upper housing and a lower housing, which together form a receiving cavity. The upper housing has a V-shaped upper partition, and the lower housing has a lower partition that is symmetrical in shape to the upper partition. When the upper housing and the lower housing are closed, the upper partition and the lower partition are connected to form the partition structure. The partition structure divides the receiving cavity into two auxiliary channels distributed vertically and two main channels distributed horizontally.

[0011] As described above, the air inlet guides the airflow to the heat dissipation of the IPM module. The hollow window is opened at the corresponding position of the auxiliary channel, and the hollow window is connected to the auxiliary channel, so that the partition structure and the module substrate together enclose the auxiliary channel.

[0012] As described above, in the air inlet-guided heat dissipation blower structure for IPM module, the motor housing has an installation step at the opening of the hollow window, the module substrate is attached to the installation step, and the module substrate is flush with the end face of the hollow window opening.

[0013] As described above, the air inlet guides the airflow to heat the IPM module. The motor housing and the module substrate are provided with a connection structure for fixing the IPM module.

[0014] The air inlet-guided heat dissipation blower structure for IPM module heat dissipation, as described above, includes a mounting hole on the module substrate and a threaded hole on the mounting step for fasteners to be tightened.

[0015] As described above, the air inlet guides the airflow to the heat dissipation of the IPM module via a blower structure, wherein the upper and lower housings are connected by a detachable connection structure.

[0016] The air inlet-guided heat dissipation blower structure for the IPM module described above includes a buckle on the upper housing and a slot on the lower housing for the buckle to engage.

[0017] Compared with the prior art, the hair dryer structure provided by this utility model has the following advantages:

[0018] 1. High-efficiency active heat dissipation improves device reliability. By embedding the IPM module in the air duct structure of the motor housing, it is directly exposed to the high-speed airflow path generated during motor operation. The main airflow and its induced auxiliary airflow directly cool the functional components of the IPM module, significantly improving heat dissipation efficiency, effectively reducing the module's operating temperature, and improving the long-term stability and reliability of the system.

[0019] 2. Highly integrated structure, saving space and cost. The IPM module is integrated into the motor housing, serving as both an electrical connection and a structural cover. This eliminates the need for traditional independent mounting brackets and additional heat dissipation structures, significantly reducing the overall volume and achieving a high degree of integration of functional components. This is beneficial for product miniaturization design and reduces the number of parts and assembly costs.

[0020] 3. Based on fluid principles, the air duct is optimized to achieve passive ejector cooling. The main and auxiliary channels are separated by a partition structure. The Bernoulli effect (high velocity and low pressure) generated by the high-speed airflow in the main channel is used to create a negative pressure suction effect in the auxiliary channel, which induces external air to flow in and cools the area where the IPM module is located. Local ventilation can be enhanced without additional power, achieving energy-saving and efficient passive airflow management. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of a utility model hair dryer;

[0022] Figure 2 This is a cross-sectional sectional view of the functional component of the utility model;

[0023] Figure 3 This is a longitudinal cross-sectional schematic diagram of the functional component of the utility model;

[0024] Figure 4 This is an exploded view of the functional components of the utility model. Figure 1 ;

[0025] Figure 5 This is an exploded view of the functional components of the utility model. Figure 2 . Detailed Implementation

[0026] The utility model will be further described below with reference to the accompanying drawings:

[0027] The orientations described in this utility model specification, such as "up," "down," "left," "right," "front," and "back," are based on the orientations in the accompanying drawings and are intended to facilitate the description of the relationships between the various components. They do not indicate the unique or absolute positional relationships between the various components, but are merely one embodiment of the utility model and are not a limitation on its implementation.

[0028] This embodiment describes a blower structure for heat dissipation of the IPM module by diverting airflow through the air inlet, such as... Figures 1 to 5 As shown, a functional component 1 is included inside a hair dryer A. The functional component 1 includes a motor housing 11, which forms a cavity 10 for mounting a motor B. The rear end of the motor housing 11 has an air inlet 12 communicating with the cavity 10, and the front end has an air outlet 13 communicating with the cavity 10. A perforated window 14 communicating with the cavity 10 is provided on the motor housing 11. An IPM module 15 for electrical connection with the motor B is connected to the motor housing 11. The IPM module (Intelligent Power Module)... A power module (IPM) is a modular component that integrates power semiconductor devices (such as IGBTs, MOSFETs, diodes, etc.) and drive and protection circuits. An IPM module 15 typically includes a module substrate 151, i.e., a circuit board substrate, and functional devices 152, such as power semiconductor devices, mounted on it. The IPM module 15 is embedded in a cutout window 14, which is then sealed. By embedding the IPM module 15 in the cutout window 14, it forms part of the housing 11, thereby significantly reducing the structural volume and improving the structural compactness. More importantly, the motor-driven high-speed airflow in the housing cavity 10 dissipates heat from the IPM module 15, greatly improving the structure's heat dissipation performance. This structure cleverly utilizes the existing airflow channels inside the blower as the active heat dissipation path for the IPM module. When the motor B operates, it drives the fan to draw in external air through the air inlet 12, forming a main airflow that flows from back to front through the housing cavity 10. This airflow not only cools the motor itself but also flows through the area where the IPM module 15 is located, achieving efficient cooling. By directly embedding the IPM module 15 into the hollow window 14 of the motor housing 11, making it one of the "walls" of the airflow channel, the functional device 152 is exposed to the high-speed airflow, significantly enhancing the convective heat transfer efficiency and avoiding the space waste and increased energy consumption caused by traditional external heat sinks or additional fans. Highly integrated structure: Integrating the IPM module as part of the housing structure eliminates the need for independent mounting brackets and outer shells, significantly reducing the overall size; Superior heat dissipation performance: Utilizing the high-speed airflow naturally generated during motor operation to directly cool the high-heat IPM module, achieving "zero-energy" active heat dissipation; High reliability: No additional heat dissipation device is required, reducing failure points and improving system stability; Low cost and easy assembly: The integrated design reduces the number of parts, lowering manufacturing and assembly costs.

[0029] Preferably, the IPM module 15 includes a module substrate 151 and functional devices 152 disposed on the module substrate 151. The module substrate 151 is covered by a perforated window 14, and the functional devices 152 are located within the receiving cavity 10, thereby improving heat dissipation efficiency. By placing the functional devices 152 inside the receiving cavity 10, directly exposing them to the main airflow path, the efficiency of heat conduction and convection heat transfer is greatly improved. Simultaneously, the module substrate 151, as a structural sealing element, also provides electrical insulation and mechanical support, further optimizing space utilization and thermal management performance.

[0030] In detail, such as Figure 4 and Figure 5 As shown, the motor housing 11 is provided with a partition structure 16 located in the receiving cavity 10. The partition structure 16 divides the receiving cavity 10 into a main channel 101 for placing the motor B and an auxiliary channel 102 located on one side of the main channel 101. The partition structure 16 extends in the front-back direction and divides the air inlet 12 into several main air inlets 121 and auxiliary air inlets 122. When airflow P1 is formed in the main air inlet 121, due to the high airflow velocity in the main channel, according to Bernoulli's principle, the greater the fluid velocity, the lower its static pressure. Therefore, a low-pressure area is formed in the main channel 101, thereby generating a pressure difference at the adjacent auxiliary air inlets 122, driving external air to flow in and forming a unidirectional induced airflow P2. This phenomenon is called the ejector effect or airflow induction effect. Bernoulli's principle states that in the steady flow of an ideal incompressible fluid, an increase in velocity leads to a decrease in static pressure. When the high-speed airflow P1 in the main channel 101 flows through the baffle structure 16, its high-speed flow creates a local negative pressure, thereby "drawing" air from the auxiliary air inlet 122 into the auxiliary channel 102, forming an auxiliary airflow P2. This phenomenon of enhancing local ventilation without additional power is widely used in ejectors, passive cooling systems, and high-efficiency air duct designs, and has advantages such as energy saving, reliability, and simple structure.

[0031] The motor housing 11 is composed of an upper housing 111 and a lower housing 112, which together form a receiving cavity 10. The upper housing 111 is provided with a V-shaped upper partition 161, and the lower housing 112 is provided with a lower partition 162 that is symmetrical in shape to the upper partition 161. When the upper housing 111 and the lower housing 112 are closed, the upper partition 161 and the lower partition 162 are connected to form the partition structure 16. The partition structure 16 divides the receiving cavity 10 into two vertically distributed auxiliary channels 102 and two horizontally distributed main channels 101. The two main channels 101 are used to arrange the motor B, forming a dual air duct. At the same time, the two auxiliary channels 102 are located between the two main channels 101, which improves the reliability of airflow generated in the auxiliary channels 102 by the ejection effect generated by Bernoulli's principle.

[0032] Advantages: The dual main channel design can be adapted to dual-motor or high-power single-motor layouts to improve airflow output; while the auxiliary channel is centrally located to ensure that the IPM module is in a stable negative pressure zone induced by the main airflow, effectively avoiding airflow dead zones and improving heat dissipation uniformity and stability.

[0033] Preferably, the perforated window 14 is located at the corresponding position of the auxiliary channel 102, and the perforated window 14 is connected to the auxiliary channel 102, so that the partition structure 16 and the module substrate 151 together enclose the auxiliary channel 102. This layout allows the IPM module 15 to directly participate in the construction of the auxiliary channel 102, with its module substrate 151 becoming the sidewall of the airflow channel, and the functional device 152 facing the induced airflow in the auxiliary channel, achieving precise directional heat dissipation and maximizing the use of the low-pressure suction effect generated by the Bernoulli effect of the main airflow for cooling.

[0034] Preferably, in order to make the structure of functional component 1 more compact, such as Figures 3 to 5 As shown, the motor housing 11 has a mounting step 141 at the opening of the cutout window 14. The module substrate 151 is set against the mounting step 141, and the end face of the module substrate 151 is flush with the opening of the cutout window 14. The mounting step 141 not only provides a precise positioning reference, but also enhances the support strength of the module substrate 151, preventing deformation or loosening caused by vibration or thermal expansion and contraction. The flush end face design facilitates smooth airflow, reduces local turbulence and pressure loss, and improves the overall air duct efficiency.

[0035] Preferably, to facilitate stable installation, a connection structure for fixing the IPM module 15 is provided between the motor housing 11 and the module base plate 151. This connection structure includes mounting holes on the module base plate 151 and threaded holes 153 on the mounting step 141 for fasteners to be tightened. The IPM module 15 is fixedly mounted on the motor housing 11 using screws or other fasteners. This connection method balances structural strength and electrical connection reliability, while also facilitating later maintenance and replacement. The threaded holes 153 are pre-drilled on the housing, avoiding the need for excessive drilling on the module base plate, which could affect circuit wiring and insulation performance.

[0036] Preferably, for ease of installation and disassembly, the upper housing 111 and the lower housing 112 are connected by a detachable connection structure. The detachable connection structure includes a snap-fit ​​113 on the upper housing 111 and a slot 114 on the lower housing 112 for the snap-fit ​​113 to engage. The snap-fit ​​and slot mechanism enables rapid assembly and tool-free disassembly, greatly improving production efficiency and maintenance convenience, and is particularly suitable for high-end hair dryer products that require frequent inspection or replacement of internal components.

[0037] This technical solution innovatively integrates the IPM module into the air duct structure of the motor housing, utilizing the ejection effect induced by Bernoulli's principle to achieve efficient, compact, and low-cost heat dissipation for high-power-density electronic devices. This structure not only improves the overall performance and reliability of the hair dryer but also provides a referable technical path for the thermal management design of other miniaturized high-power electrical appliances. Compared to traditional heat dissipation methods, this solution eliminates the need for additional fans or heat sinks, truly realizing the design concept of "structure as function," and possesses significant technological advancement and market application prospects.

[0038] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A blower structure for heat dissipation of an IPM module by diverting airflow through the air inlet, characterized in that: The device includes a functional component (1) installed inside the hair dryer. The functional component (1) includes a motor housing (11), which forms a cavity (10) for installing a motor. The rear end of the motor housing (11) is provided with an air inlet (12) communicating with the cavity (10), and the front end is provided with an air outlet (13) communicating with the cavity (10). The motor housing (11) is provided with a perforated window (14) communicating with the cavity (10). An IPM module (15) for electrical connection with the motor is connected to the motor housing (11). The IPM module (15) is embedded in the perforated window (14) and covers the perforated window (14).

2. The air blower structure for heat dissipation of the IPM module by air inlet diversion according to claim 1, characterized in that: The IPM module (15) includes a module substrate (151) and functional devices (152) arranged on the module substrate (151). The module substrate (151) is covered with a cutout window (14), and the functional devices (152) are located in the receiving cavity (10).

3. The air inlet-guided heat dissipation blower structure for IPM module cooling according to any one of claims 1 or 2, characterized in that: The motor housing (11) is provided with a partition structure (16) located in the receiving cavity (10). The partition structure (16) divides the receiving cavity (10) into a main channel (101) for placing the motor and an auxiliary channel (102) located on one side of the main channel (101). The partition structure (16) extends in the front-back direction and divides the air inlet (12) into several main air inlets (121) and auxiliary air inlets (122).

4. The air blower structure for heat dissipation of the IPM module by air inlet diversion according to claim 3, characterized in that: The motor housing (11) is composed of an upper housing (111) and a lower housing (112), which together form a receiving cavity (10). The upper housing (111) is provided with a V-shaped upper partition (161), and the lower housing (112) is provided with a lower partition (162) that is symmetrical to the shape of the upper partition (161). When the upper housing (111) and the lower housing (112) are closed, the upper partition (161) and the lower partition (162) are connected to form the partition structure (16). The partition structure (16) divides the receiving cavity (10) into two auxiliary channels (102) distributed vertically and two main channels (101) distributed horizontally.

5. The air blower structure for heat dissipation of the IPM module by air inlet diversion according to claim 4, characterized in that: The cutout window (14) is opened at the position corresponding to the auxiliary channel (102), and the cutout window (14) is connected to the auxiliary channel (102), so that the partition structure (16) and the module substrate (151) together enclose the auxiliary channel (102).

6. The air blower structure for heat dissipation of the IPM module by air inlet diversion according to claim 5, characterized in that: The motor housing (11) has an installation step (141) at the opening of the hollow window (14), the module substrate (151) is set against the installation step (141), and the module substrate (151) is flush with the end face of the opening of the hollow window (14).

7. The air blower structure for heat dissipation of the IPM module by air inlet diversion according to claim 5, characterized in that: A connection structure for fixing the IPM module (15) is provided between the motor housing (11) and the module base plate (151).

8. The air inlet-guided heat dissipation blower structure for IPM module cooling according to claim 7, characterized in that: The connection structure includes mounting holes on the module base plate (151) and threaded holes (153) on the mounting step (141) for fasteners to be tightened.

9. The air blower structure for heat dissipation of the IPM module by air inlet diversion according to claim 4, characterized in that: The upper shell (111) and the lower shell (112) are connected by a detachable connection structure.

10. The air blower structure for heat dissipation of the IPM module by air inlet diversion according to claim 9, characterized in that: The detachable connection structure includes a buckle (113) on the upper housing (111) and a slot (114) on the lower housing (112) for the buckle (113) to be engaged.

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