Contact point cooling structure and heater

Abstract

The invention discloses a contact point cooling structure and a heater. The contact point cooling structure comprises a fan, an air guide piece and a PTC support, the PTC support is provided with a PTC element, the air guide piece is arranged on the air outlet side facing the fan, and a gap is formed between the air guide piece and the PTC support. The air flow blown out by the fan is accurately guided to the contact point formed by the PTC element and the PTC support through the air guide piece, local accurate cooling of the contact point is achieved, it is ensured that the contact point is always kept within a proper temperature range in the working process, and support damage and equipment faults caused by overheating are effectively prevented; meanwhile, as the gap is formed between the air guide piece and the PTC support, the air flow can smoothly wrap and cover the whole contact point, the cooling effect is more uniform and comprehensive, the situation that the temperature of a local area is too high due to insufficient heat dissipation is avoided, and the heat resistance and the stability of the contact point are further enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heaters, in particular to a contact point cooling structure and a heater. BACKGROUND

[0002] In the field of PTC heaters, PTC elements (such as PTC ceramic sheets) serve as the core heating components, which are usually fixed in devices through injection-molded supports. PTC supports are typically made of engineering plastics (such as nylon or polycarbonate) through injection molding to reduce costs and weight. However, during the operation of PTC elements, the contact points between PTC supports and PTC elements (i.e., the bonding surfaces of PTC supports and PTC elements) are prone to scorching and melting due to the concentration of heat generated by the current. This not only leads to the damage of the support structure, causing short circuits or failures of the device, but also may cause safety hazards.

[0003] PTC heaters have been widely used in many fields such as automobiles, home appliances, and industrial equipment due to their high efficiency, energy saving, and safety. PTC elements, as the core heating components, are crucial to the performance and stability of the entire heater. In the prior art, in order to fix PTC elements, injection-molded supports are usually used to install them in devices. Such supports are generally made of engineering plastics such as nylon or polycarbonate through injection molding process. This material selection and manufacturing process to some extent reduces the cost and weight of the device, which conforms to the development trend of modern products towards lightweight and low cost.

[0004] However, this prior art has a significant defect. When PTC elements are in operation, heat is generated by the current passing through the PTC elements, especially in local areas where the heat generation is more concentrated. At this time, the contact points between the PTC support and the PTC element, i.e., the bonding surface of the support and the PTC element, will bear high temperatures. Due to the limited heat resistance of engineering plastics, these contact points are prone to scorching and melting under the action of high temperature for a long time. Once this happens, the structural integrity of the support will be damaged, which may lead to short circuits or complete failures of the device. More seriously, such damage may also cause a series of safety hazards such as fire, posing a threat to the users of the device and the surrounding environment.

[0005] Although there are some technical solutions on the market to improve PTC heaters, these solutions mostly focus on improving the performance of PTC elements themselves or optimizing the overall structure of the heater. Effective solutions to the problem of overheating of the contact points between PTC supports and PTC elements are still relatively lacking. Therefore, how to solve the problem of easy overheating and damage of the contact points between the support and the PTC element in the existing PTC heater has become a technical problem that needs to be solved by technical personnel in this field. SUMMARY

[0006] The application aims to overcome the deficiencies of the prior art and provide a contact point cooling structure and a heater.

[0007] To solve the above technical problems, the application adopts the following technical scheme: In a first aspect, the application provides a contact point cooling structure, comprising: a fan, a wind guide and a PTC support, the PTC support being provided with a PTC element, the wind guide being arranged on a side facing the air outlet of the fan, and a gap being arranged between the wind guide and the PTC support.

[0008] In a specific embodiment, a flow guide groove is arranged on the side of the wind guide facing the fan.

[0009] In a specific embodiment, the wind guide comprises a mounting seat, the mounting seat extending outwardly to provide a wind guide rod, and the flow guide groove being arranged on the wind guide rod.

[0010] In a specific embodiment, the fan is provided with a mounting support, and the mounting seat is connected to the mounting support.

[0011] In a specific embodiment, the mounting support is provided with a screw column, and the mounting seat is connected to the screw column.

[0012] In a specific embodiment, the depth of the flow guide groove is 1-8 mm.

[0013] In a specific embodiment, the width of the flow guide groove is 2-15 mm.

[0014] In a specific embodiment, the cross section of the flow guide groove is rectangular or arc-shaped.

[0015] In a specific embodiment, the gap distance between the wind guide and the PTC support is 1-10 mm.

[0016] Compared with the prior art, the contact point cooling structure of the application has the following beneficial effects: the airflow blown by the fan is precisely guided to the contact point formed by the PTC element and the PTC support through the wind guide, realizing local and precise cooling of the contact point. This design avoids the problem of uneven heat dissipation in the traditional heat dissipation mode, ensures that the contact point always remains within a suitable temperature range during operation, and effectively prevents damage to the support and equipment failure caused by overheating. At the same time, since a gap is arranged between the wind guide and the PTC support, the airflow can smoothly wrap and cover the entire contact point. This structure design makes the cooling effect more uniform and comprehensive, avoids the situation that the temperature is too high in the local area due to insufficient heat dissipation, and further enhances the heat resistance and stability of the contact point.

[0017] In a second aspect, the embodiment of the present application provides a heater comprising the contact point cooling structure as described above.

[0018] The heater of the present application has the following advantages compared with the prior art: by setting the contact point cooling structure and using the air guide member to precisely guide the airflow blown by the fan to the contact point formed by the PTC element and the PTC support, the local precise cooling of the contact point is realized, which avoids the problem of uneven heat dissipation in the traditional heat dissipation mode, ensures that the contact point always remains in the appropriate temperature range during the working process, and effectively prevents the damage of the support and the equipment failure caused by overheating. At the same time, since the gap is provided between the air guide member and the PTC support, the airflow can smoothly wrap and cover the entire contact point, and this structure design makes the cooling effect more uniform and comprehensive, avoiding the situation that the local area appears high temperature due to insufficient heat dissipation, and further enhancing the heat resistance and stability of the contact point.

[0019] The present application will be further described below in conjunction with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 Application scenario of the contact point cooling structure provided by the present application Figure 1 ; Figure 2 Application scenario of the contact point cooling structure provided by the present application Figure 1 ; Figure 3 Application scenario of the contact point cooling structure provided by the present application Figure 2 ; Figure 4 Application scenario of the contact point cooling structure provided by the present application Figure 3 ; Figure 5 Application scenario of the contact point cooling structure provided by the present application Figure 3 ; Figure 6 Front view of the air guide member provided by the present application Figure 7 Back view of the air guide member provided by the present application Figure 8 Schematic view of the air guide member provided by the present application

[0022] Reference signs: The fan 10, the mounting bracket 11, the air guide 20, the mounting seat 21, the air guide rod 22, the air guide groove 221, and the PTC bracket 30. DETAILED DESCRIPTION

[0023] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0026] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0027] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example: it can be connected, or detachable, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature is "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher in horizontal height than the second feature. The first feature is "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the first feature is lower in horizontal height than the second feature.

[0029] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application.

[0030] Referring to Figures 1 to 8 As shown, the present application discloses a specific embodiment of a contact point cooling structure, which comprises a fan 10, a wind guide 20 and a PTC support 30, the PTC support 30 is installed with a PTC element, the wind guide 20 is arranged on the side facing the air outlet of the fan 10, and a gap is provided between the wind guide 20 and the PTC support 30.

[0031] Specifically, the fan 10 is the power source of the cooling structure, which is used to provide cooling air flow. The fan 10 is installed at a suitable position of the PTC heater to ensure that its air outlet is directly opposite to the wind guide 20. The air volume and air speed of the fan 10 can be adjusted according to the actual heat generation of the PTC element to ensure sufficient cooling effect. For example, in a high-power PTC heater, a fan 10 with larger air volume can be used; while in a low-power device, a fan 10 with smaller air volume can be selected to save energy consumption.

[0032] The main function of the wind guide 20 is to accurately guide the air flow blown by the fan 10 to the contact point of the PTC element and the PTC support 30. The wind guide 20 is usually made of materials with good heat resistance and certain strength, such as engineering plastics. The shape and size of the wind guide 20 should be optimized according to the specific structure of the PTC element and the support to ensure that the air flow can uniformly cover the entire contact point.

[0033] The air guide 20 is installed on the air outlet side of the fan 10, and its position and angle are accurately calculated to ensure that the airflow can be directly blown to the contact point. A certain gap is provided between the air guide 20 and the PTC support 30. The provision of this gap not only ensures that the airflow can smoothly enter the contact point area, but also enables the airflow to form a certain vortex around the contact point, further enhancing the heat dissipation effect.

[0034] The PTC support 30 is used to fix the PTC element, and is usually made of engineering plastic (such as nylon or polycarbonate) by injection molding. The PTC element is fixed on the support by mechanical or chemical means to ensure its stability and reliability during operation. In this cooling structure, the design of the PTC support 30 needs to consider the flow-through property of the airflow to avoid excessive obstruction to the airflow, thereby affecting the heat dissipation effect.

[0035] When the fan 10 starts, the airflow is blown out from the air outlet of the fan 10 and guided by the air guide 20 to directly blow to the contact point between the PTC element and the PTC support 30. Because a gap is provided between the air guide 20 and the PTC support 30, the airflow can smoothly enter the contact point area and form a certain vortex around the contact point. This vortex effect enables the airflow to uniformly cover the entire contact point, carrying away the heat generated by the contact point, thereby achieving local precise cooling.

[0036] That is, by using the air guide 20 to precisely guide the airflow blown by the fan 10 to the contact point formed by the PTC element and the PTC support 30, local precise cooling of the contact point is achieved. This design avoids the problem of uneven heat dissipation in traditional heat dissipation methods, ensuring that the contact point always remains within the appropriate temperature range during operation, effectively preventing damage to the support and equipment failure due to overheating. At the same time, because a gap is provided between the air guide 20 and the PTC support 30, the airflow can smoothly wrap and cover the entire contact point. This structural design makes the cooling effect more uniform and comprehensive, avoiding the situation where the local area has a temperature that is too high due to insufficient heat dissipation, further enhancing the heat resistance and stability of the contact point. In addition, by effectively reducing the temperature of the contact point, the risk of aging, deformation or damage of the PTC support 30 material due to high temperature is reduced, which not only prolongs the service life of the PTC support 30, but also indirectly improves the service life and reliability of the entire PTC heater, reducing the maintenance cost and replacement frequency of the equipment. In addition, by ensuring that the contact point operates within a safe temperature range, the risk of safety accidents during equipment operation is significantly reduced, providing users with a safer and more reliable product experience. In addition, the introduction of this cooling structure optimizes the overall heat dissipation efficiency of the PTC heater, making the heat dissipation process more efficient through precise airflow guidance and comprehensive contact point coverage, improving the stability and performance of the equipment during high-load operation, and providing a strong guarantee for the reliable operation of the PTC heater in various application scenarios.

[0037] See Figures 6 to 8 As shown, in one embodiment, the air guide 20 is provided with a flow guide groove 221 on the side facing the fan 10.

[0038] Specifically, the airflow guide 221 is a key structure on the side of the air guide 20 facing the fan 10, used to further optimize the airflow guidance effect. The design of the airflow guide 221 includes its shape, size, and distribution, parameters of which need to be optimized based on the specific location and shape of the contact point between the PTC element and the PTC bracket 30. The airflow guide 221 is typically designed as V-shaped, U-shaped, or rectangular, with the specific shape depending on the airflow guidance requirements and the geometry of the contact point. For example, a V-shaped airflow guide 221 can guide airflow more concentratedly, suitable for scenarios requiring high-precision cooling; while a U-shaped or rectangular airflow guide 221 can provide a more uniform airflow distribution, suitable for situations with a larger contact area. Simultaneously, the depth and width of the airflow guide 221 should be adjusted according to the airflow volume and velocity of the fan 10. Generally, the depth of the airflow guide 221 is between 1-10 mm, and the width is between 2-20 mm. Deeper guide channels 221 can better concentrate airflow, but may increase airflow resistance; shallower guide channels 221 can reduce resistance, but the guiding effect is relatively weaker. Furthermore, guide channels 221 can be single or multiple, and their specific distribution depends on the layout of the contact points. In the case of a single contact point, a single main guide channel 221 can be designed to directly align with the contact point; in the case of multiple contact points, multiple guide channels 221 can be designed, each aligned with a different contact point, to achieve a comprehensive cooling effect.

[0039] When the fan 10 starts, airflow is blown out from the outlet of the fan 10 and first enters the guide channel 221. The design of the guide channel 221 allows the airflow to be further concentrated and guided, forming a well-directed and uniformly oriented airflow. This airflow then passes through the gap between the air guide 20 and the PTC bracket 30, precisely blowing towards the contact point between the PTC element and the PTC bracket 30. Due to the function of the guide channel 221, the airflow has a higher speed and a more concentrated direction when it reaches the contact point, which can more effectively remove the heat generated at the contact point. At the same time, the design of the guide channel 221 can also reduce energy loss of the airflow during transmission and improve heat dissipation efficiency.

[0040] That is, the design of the flow guide groove 221 enables the airflow to be more precisely blown to the contact points of the PTC element and the PTC support 30. Compared to the structure without the flow guide groove 221, the flow guide groove 221 can significantly improve the concentration and directionality of the airflow, ensuring that the cooling effect is concentrated in the area that needs cooling the most. This high-precision cooling method can effectively prevent the contact points from being damaged due to local overheating, prolonging the service life of the equipment. At the same time, through the optimized design of the flow guide groove 221, the airflow has a higher speed and more concentrated directionality when it reaches the contact points. This enables the airflow to more effectively carry away the heat generated by the contact points, thereby significantly improving the heat dissipation efficiency. Under the same fan 10 wind volume and wind speed conditions, the air guide piece 20 with the flow guide groove 221 can achieve better cooling effect, further reducing the temperature of the contact points. In addition, the shape and size of the flow guide groove 221 are optimized, which can reduce the resistance of the airflow during transmission. Compared with a simple flat air guide piece 20, the air guide piece 20 with the flow guide groove 221 can more smoothly guide the airflow, reducing energy loss. This not only improves the heat dissipation efficiency, but also reduces the energy consumption of the fan 10, making the entire cooling system more energy-efficient and efficient.

[0041] Referring to Figures 6 to 8 As shown in the drawings, in an embodiment, the air guide piece 20 includes a mounting seat 21, the mounting seat 21 extends outwardly with an air guide rod 22, and the air guide rod 22 is provided with the flow guide groove 221.

[0042] Specifically, the air guide piece 20 is composed of a mounting seat 21 and an air guide rod 22, wherein the mounting seat 21 is the base part of the air guide piece 20, used to fix the air guide piece 20 in the appropriate position of the PTC heater. The mounting seat 21 can be connected with the shell or other components of the heater through screws, buckles or other mechanical fixing methods, ensuring the stability and reliability of the air guide piece 20 during work. The air guide rod 22 extends outwardly from the mounting seat 21, and its number and layout are designed according to the number and position of the contact points of the PTC element and the PTC support 30. Each contact point corresponds to an air guide rod 22, ensuring that each contact point can be effectively cooled. The length and shape of the air guide rod 22 are optimized according to the specific position of the contact point, to ensure that the airflow can smoothly reach each contact point. Each air guide rod 22 is provided with a flow guide groove 221, and the shape and size of the flow guide groove 221 are designed according to the guiding requirements of the airflow.

[0043] When the fan 10 is started, the air flow is blown out of the fan 10, first entering the guide groove 221 on the air guide rod 22, and forming a clear direction and uniform speed air flow. This air flow then passes through the gap between the air guide rod 22 and the PTC support 30, precisely blowing to the contact point of the PTC element and the PTC support 30. Since each contact point corresponds to an air guide rod 22 and a guide groove 221, the air flow can be evenly distributed to each contact point, ensuring that each contact point can be effectively cooled. This design not only improves the accuracy and efficiency of cooling, but also reduces the risk of damage caused by local overheating.

[0044] That is, by designing independent air guide rods 22 and guide grooves 221 for each contact point, the air flow can be more precisely blown to each contact point. Compared with the design of a single air guide 20, this multi-air guide rod 22 structure can significantly improve the accuracy and uniformity of cooling, ensuring that each contact point can be effectively cooled and effectively preventing damage caused by local overheating. At the same time, the guide grooves 221 on each air guide rod 22 further optimize the guiding effect of the air flow, so that the air flow can reach the contact point with higher speed and more concentrated direction. This design not only improves the heat dissipation efficiency, but also reduces the energy loss of the air flow during transmission, further reducing the temperature of the contact point.

[0045] Referring to Figures 1 to 5 As shown in the embodiment, the fan 10 is provided with a mounting bracket 11, and the mounting seat 21 is connected to the mounting bracket 11.

[0046] Specifically, the mounting bracket 11 is a key component for fixing the fan 10 and providing a mounting interface. Its design needs to consider the cooperation with the air guide 20 to ensure that the air guide 20 can be stably mounted on the mounting bracket 11. The mounting bracket 11 is usually made of metal or high-strength engineering plastic to ensure sufficient mechanical strength and stability. The shape and size of the mounting bracket 11 are designed according to the specifications and installation requirements of the fan 10. The mounting bracket 11 is provided with mounting holes or clamping grooves for fixing the fan 10 and providing a connection interface with the mounting seat 21.

[0047] The mounting seat 21 of the air guide 20 is designed to match the connection interface of the mounting bracket 11. The shape and size of the mounting seat 21 are optimized according to the specific design of the mounting bracket 11 to ensure that the two can be closely matched. The mounting seat 21 can be connected in the following ways: Embedded connection: the mounting seat 21 is designed to be directly embedded in the clamping groove or groove of the mounting bracket 11. This design does not require additional fixing parts, and the mounting seat 21 only needs to be aligned with the clamping groove of the mounting bracket 11 during installation, and can be installed by pressing gently. This connection method is simple and quick, and is convenient for disassembly and maintenance.

[0048] Screw fixation: The mounting seat 21 is provided with threaded holes, which are fixed on the mounting bracket 11 by screws. This connection method is suitable for scenes with high installation strength requirements, and can ensure the stability and reliability of the air guide piece 20 during work. Screw fixation can also provide certain adjustment space, which is convenient for fine adjustment of the position of the air guide piece 20 during installation.

[0049] Snap connection: The mounting seat 21 and the mounting bracket 11 are provided with snap structures that cooperate with each other. During installation, the mounting seat 21 is only needed to be aligned with the snap position of the mounting bracket 11, and then pressed down to complete the connection. The snap connection method is simple to install, and can provide sufficient fixing force, and is suitable for most application scenarios.

[0050] That is, by designing the direct connection of the mounting seat 21 and the mounting bracket 11, without the need for additional modification of the equipment structure, the installation process is simple and fast. This design greatly reduces the installation time and labor intensity, and improves the production efficiency. Especially in large-scale production or on-site installation process, the simple installation method can significantly reduce the labor cost and installation time. At the same time, due to the simple installation process, the rework and maintenance cost caused by improper installation is reduced, further reducing the overall use cost.

[0051] Referring to Figure 5 the mounting bracket 11 is provided with a screw column, and the mounting seat 21 is connected to the screw column.

[0052] Specifically, the screw column is designed to be irregular in shape, which has a foolproof effect and can ensure that the air guide piece 20 can only be installed in the correct way during assembly. For example, the screw column can be designed to have a specific groove or protrusion shape, which matches the corresponding structure on the mounting seat 21 of the air guide piece 20. At the same time, the size of the screw column is designed according to the threaded hole or fixing hole on the mounting seat 21, to ensure that they can fit tightly. The height of the screw column should be sufficient to support the air guide piece 20 and provide enough space for the installation of the screw.

[0053] That is, the irregular shape and foolproof structure of the screw column ensure that the air guide piece 20 can only be installed in the correct way during assembly. This design effectively prevents assembly errors and reduces equipment failure and rework costs caused by improper assembly. In large-scale production and on-site installation, the foolproof design can significantly improve the assembly efficiency and quality. At the same time, by fixing the air guide piece 20 on the mounting bracket 11 through the screw, it ensures that the air guide piece 20 is stable and reliable during work, and will not loosen due to vibration or airflow impact. This stable installation method is crucial for ensuring the precise guidance of airflow and the continuous and effective cooling effect, further improving the operation reliability and service life of the equipment.

[0054] In an embodiment, the depth of the guide groove 221 is 1mm-8mm.

[0055] Specifically, if the air volume of the fan 10 is large and the air speed is high, a deeper guide groove 221 (e.g., 6mm-8mm) can be selected to better concentrate airflow and reduce airflow diffusion. Conversely, if the air volume of the fan 10 is small and the air speed is low, a shallower guide groove 221 (e.g., 1mm-3mm) can be selected to reduce airflow resistance and ensure smooth airflow to the contact point. In addition, for contact points with high heat generation, more efficient heat dissipation is required, so a deeper guide groove 221 can be selected to enhance the guiding effect of airflow. For contact points with low heat generation, a shallower guide groove 221 may be sufficient. In addition, the depth of the guide groove 221 also needs to match the overall size and structure of the air guide rod 22. If the air guide rod 22 is thin, the depth of the guide groove 221 should not be too large to affect the structural strength of the air guide rod 22; if the air guide rod 22 is thick, a deeper guide groove 221 can be designed to improve heat dissipation efficiency.

[0056] That is, the depth of the guide groove 221 is between 1mm and 8mm, which can effectively concentrate airflow and guide it to the contact point. A deeper guide groove 221 can better concentrate airflow and reduce airflow diffusion, thereby increasing airflow speed and heat dissipation efficiency. Even in the case of small air volume, a deeper guide groove 221 can ensure that the airflow can efficiently carry away the heat generated by the contact point, significantly reducing the temperature of the contact point. At the same time, selecting the appropriate depth can effectively reduce airflow resistance. A shallower guide groove 221 (e.g., 1mm-3mm) can reduce energy loss of airflow in the guide groove 221 under low air volume and low air speed conditions, ensuring smooth airflow to the contact point. This design not only improves heat dissipation efficiency, but also reduces the energy consumption of the fan 10, making the entire cooling system more energy-efficient. In addition, the depth of the guide groove 221 ranges from 1mm to 8mm, which can adapt to different heat dissipation needs. For contact points with high heat generation, a deeper guide groove 221 can be selected to enhance heat dissipation; for contact points with low heat generation, a shallower guide groove 221 can be selected to meet basic heat dissipation needs. This flexibility makes the air guide 20 applicable to PTC heaters of various power and size, with wide applicability.

[0057] In an embodiment, the width of the guide groove 221 is 2mm-15mm.

[0058] Specifically, if a larger airflow volume is required to meet high heat dissipation demands, a wider flow guide groove 221 (e.g., 10-15 mm) can be chosen. The wider flow guide groove 221 can accommodate more airflow, thereby improving heat dissipation efficiency. Conversely, if the heat dissipation demand is lower, a narrower flow guide groove 221 (e.g., 2-5 mm) can be chosen to reduce material usage and optimize structural design. At the same time, the groove width of the flow guide groove 221 should match the size and layout of the contact points. For larger contact points or multiple contact points, a wider flow guide groove 221 is needed to ensure that the airflow can uniformly cover all contact points. For smaller or single contact points, a narrower flow guide groove 221 can be sufficient. In addition, the groove width of the flow guide groove 221 needs to be balanced with the overall structural strength of the air guide rod 22. If the flow guide groove 221 is too wide, it may weaken the structural strength of the air guide rod 22, affecting its stability and durability. Therefore, in the design, it is necessary to ensure that the width of the flow guide groove 221 does not negatively affect the structural integrity of the air guide rod 22.

[0059] That is, the groove width of the flow guide groove 221 is between 2 mm and 15 mm, which can effectively regulate the airflow volume to meet different heat dissipation demands. The wider flow guide groove 221 can accommodate more airflow, thereby improving heat dissipation efficiency and ensuring that the contact points remain within a safe temperature range even under high heat generation conditions. Even under low wind conditions, the wider flow guide groove 221 can ensure that sufficient airflow reaches the contact points, improving heat dissipation effectiveness. At the same time, choosing the appropriate groove width can effectively reduce airflow resistance. The narrower flow guide groove 221 (e.g., 2-5 mm) can reduce energy loss of airflow within the flow guide groove 221 under low heat dissipation demand conditions, ensuring smooth airflow to the contact points. This design not only improves heat dissipation efficiency but also reduces the energy consumption of the fan 10, making the entire cooling system more energy-efficient and efficient. In addition, the groove width range of the flow guide groove 221 is 2-15 mm, which can adapt to different heat dissipation demands. For contact points with high heat generation, a wider flow guide groove 221 can be chosen to enhance heat dissipation effectiveness; for contact points with low heat generation, a narrower flow guide groove 221 can be chosen to meet basic heat dissipation demands. This flexibility makes the air guide 20 applicable to PTC heaters of various power and size, with wide applicability.

[0060] In an embodiment, the cross-section of the flow guide groove 221 is rectangular or arc-shaped.

[0061] Specifically, the cross-section of the flow guide groove 221 can be designed as a rectangle or an arc. These two shapes have their own characteristics and applicable scenarios, and the specific choice depends on heat dissipation demands, airflow characteristics, and optimization goals of structural design.

[0062] Rectangular flow guide groove 221: The rectangular-shaped flow guide groove 221 has clear boundaries and right-angled edges, and its width and depth can be precisely adjusted according to heat dissipation requirements. The size design of the rectangular-shaped flow guide groove 221 needs to consider the flow rate and speed of the air flow to ensure that the air flow can efficiently pass through the flow guide groove 221 and reach the contact point. The rectangular-shaped flow guide groove 221 can be manufactured by injection molding, mechanical milling or wire cutting process. Injection molding is suitable for mass production and can achieve high-precision cavity molding; mechanical milling is suitable for medium-precision requirements and can flexibly adjust the size of the groove; wire cutting is suitable for high-precision requirements and can manufacture very fine rectangular-shaped flow guide grooves 221.

[0063] The arc-shaped flow guide groove 221: The arc-shaped flow guide groove 221 has smooth curved edges, which can reduce the resistance of the air flow when passing through, making the air flow more smooth. The design of the arc-shaped flow guide groove 221 needs to consider the dynamic characteristics of the air flow to optimize the guiding effect of the air flow. The radius and depth of the arc-shaped flow guide groove 221 can be adjusted according to specific requirements to achieve the best heat dissipation effect. The manufacturing of the arc-shaped flow guide groove 221 needs to use processing technology that can handle complex surfaces. Injection molding can achieve the molding of the arc-shaped flow guide groove 221 by precisely designing the cavity of the mold; mechanical processing (such as milling or turning) is suitable for medium-precision requirements and can manufacture arc-shaped flow guide grooves 221 with certain curvature; 3D printing technology is particularly suitable for manufacturing complex arc-shaped structures and can quickly realize the design prototype.

[0064] If the heat dissipation requirement is high and the air flow needs to be concentrated to improve the heat dissipation efficiency, the rectangular-shaped flow guide groove 221 is a better choice because it can provide a more definite air flow channel. If the heat dissipation requirement is relatively low and the air flow resistance needs to be reduced to improve the smoothness of the air flow, the arc-shaped flow guide groove 221 may be more suitable. In addition, the speed and flow rate of the air flow are also important factors in selecting the shape of the flow guide groove 221. For high-speed air flow, the arc-shaped flow guide groove 221 can reduce resistance and improve the guiding efficiency of the air flow; for low-speed air flow, the rectangular-shaped flow guide groove 221 can provide a more stable air flow channel.

[0065] In an embodiment, the gap distance between the air guide 20 and the PTC support 30 is 1-10 mm.

[0066] Specifically, the gap distance needs to be large enough to ensure that the airflow can pass through smoothly and reach the contact point. If the gap is too small (e.g., less than 1 mm), it may cause airflow obstruction, affecting the heat dissipation effect; if the gap is too large (e.g., greater than 10 mm), it may cause the airflow to be too dispersed, reducing the concentration of airflow and the heat dissipation efficiency. For high heat dissipation demand scenarios, a larger gap distance (e.g., 8-10 mm) can be selected to ensure that sufficient airflow can reach the contact point and carry away more heat. For low heat dissipation demand scenarios, a smaller gap distance (e.g., 1-3 mm) may be sufficient, while reducing material usage and optimizing structural design.

[0067] That is, the gap distance between the air guide 20 and the PTC support 30 is 1-10 mm, which can ensure that the airflow can pass through smoothly and reach the contact point. A larger gap distance (e.g., 8-10 mm) can accommodate more airflow, increasing airflow speed and flow, thereby improving heat dissipation efficiency. Even under low wind conditions, a larger gap distance can ensure that sufficient airflow reaches the contact point and carries away more heat. In addition, a proper gap distance can optimize airflow distribution, allowing airflow to evenly cover the contact point. A smaller gap distance (e.g., 1-3 mm) can reduce airflow diffusion, increase airflow concentration, and ensure that airflow can precisely blow to the contact point. This design not only improves heat dissipation efficiency but also reduces the problem of local overheating caused by uneven airflow.

[0068] In an embodiment, the air guide 20 is made of injection molding process and is made of the same material as the PTC support 30 (e.g., heat-resistant nylon).

[0069] Specifically, the air guide 20 and the PTC support 30 are both made of heat-resistant nylon material. Heat-resistant nylon is a high-performance engineering plastic with the following characteristics: Heat resistance: It can maintain good mechanical properties and dimensional stability at high temperatures, making it suitable for use in high-temperature environments such as PTC heaters.

[0070] Mechanical strength: It has high strength and toughness, can withstand certain mechanical stress, and ensures the stability of the air guide 20 and the support during operation.

[0071] In addition, heat-resistant nylon material is relatively economical and has good processing performance, making it suitable for mass production.

[0072] The application also discloses a heater comprising the contact point cooling structure as described above.

[0073] Specifically, by setting the contact point cooling structure and using the air guide 20 to precisely guide the airflow blown by the fan 10 to the contact point formed by the PTC element and the PTC support 30, local precise cooling of the contact point is achieved. This design avoids the problem of uneven heat dissipation in traditional cooling methods, ensuring that the contact point always remains within the appropriate temperature range during operation, effectively preventing support damage and equipment failure caused by overheating. At the same time, since a gap is provided between the air guide 20 and the PTC support 30, the airflow can smoothly wrap and cover the entire contact point. This structural design makes the cooling effect more uniform and comprehensive, avoiding the situation where local areas have excessively high temperatures due to insufficient cooling, further enhancing the heat resistance and stability of the contact point. In addition, by effectively reducing the temperature of the contact point, the risk of the PTC support 30 material aging, deforming or being damaged due to high temperature is reduced, which not only prolongs the service life of the PTC support 30, but also indirectly improves the service life and reliability of the entire PTC heater, reducing the maintenance cost and replacement frequency of the equipment.

[0074] The above embodiments are the preferred implementation of the present application, in addition to this, the present application can be implemented in other ways, without departing from the technical scheme concept, any obvious replacement within the protection scope of the present application.

Claims

1. A contact point cooling structure, characterized in that, include: The fan, air guide, and PTC bracket are provided. The PTC bracket is equipped with a PTC element. The air guide is located on the air outlet side facing the fan, and there is a gap between the air guide and the PTC bracket.

2. The contact point cooling structure according to claim 1, characterized in that, The air guide component has a flow channel on the side facing the fan.

3. The contact point cooling structure according to claim 2, characterized in that, The air guide component includes a mounting base, and an air guide rod extends outward from the mounting base. The air guide rod is provided with the airflow groove.

4. The contact point cooling structure according to claim 3, characterized in that, The fan is provided with a mounting bracket, and the mounting base is connected to the mounting bracket.

5. The contact point cooling structure according to claim 4, characterized in that, The mounting bracket is provided with screw posts, and the mounting base is connected to the screw posts.

6. The contact point cooling structure according to claim 3, characterized in that, The depth of the guide channel is 1mm-8mm.

7. The contact point cooling structure according to claim 3, characterized in that, The width of the guide channel is 2mm-15mm.

8. The contact point cooling structure according to claim 3, characterized in that, The cross-section of the guide channel is rectangular or arc-shaped.

9. The contact point cooling structure according to claim 1, characterized in that, The gap between the air guide and the PTC bracket is 1mm-10mm.

10. A heater, characterized in that, Including the contact point cooling structure as described in any one of claims 1-9.

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