Anti-condensation structure and method and vehicle

Abstract

The invention provides an anti-condensation structure and method and a vehicle, and belongs to the technical field of vehicle-mounted electric appliance protection. The anti-condensation structure comprises a ventilation device arranged on an electric device and a detection device arranged in the electric device. The ventilation device is provided with a first channel and a second channel which are arranged respectively, the first channel and the second channel communicate the interior of the electric device with the outside, a first control part and a detection part are arranged in the first channel, and a second control part and a drying part are arranged in the second channel. The first control part is used for controlling on-off of the first channel, the detection part is used for detecting air entering the electric device through the first channel, the second control part is used for controlling on-off of the second channel, the drying part is used for drying air flowing through the second channel, and the detection device is used for detecting air in the electric device. The anti-condensation structure can effectively reduce the possibility that condensation is generated in the electric device, and effectively protect the electric device from being damaged by condensation.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle electrical appliance protection, and particularly to an anti-condensation structure, an anti-condensation method based on the anti-condensation structure, and a vehicle provided with the anti-condensation structure. Background Art

[0002] For vehicle electrical components, such as a motor controller mounted on a vehicle, during the operation of the motor controller, the internal temperature will rise and fall with the working conditions. When there is a temperature difference with the external environment, a pressure difference will be formed inside and outside. When the pressure difference is too large, the controller may not be able to withstand the pressure and cracks may occur, and it is necessary to interact with the outside air through a breather valve. However, once the humidity inside the controller is too high, condensation is very likely to occur during operation. These water droplets generated by condensation will not only corrode the PCB board circuit, thus causing a short-circuit fault, but also reduce the electrical clearance of high-voltage components, increasing the risk of sparking failure and the like.

[0003] Currently, the industry has adopted various methods for preventing condensation in motor controllers, but there are certain limitations in all of them:

[0004] Firstly, the method of placing a moisture-absorbing material inside the controller is adopted, aiming to adsorb the moisture in the air to prevent the formation of condensation. Due to the saturation characteristic of the moisture-absorbing material, after reaching the moisture-absorbing limit, it is necessary to regularly open the controller cover for replacement, which greatly increases the difficulty and workload of maintenance and has poor operability.

[0005] Secondly, an anti-condensation channel is constructed outside the controller, and a moisture-absorbing material is placed in the channel, hoping to ensure that the air entering the controller is dry enough to suppress the condensation phenomenon. This design, on the one hand, will significantly increase the lateral size of the controller, resulting in an increase in the overall weight, which brings inconvenience to installation and layout. On the other hand, the complex channel design will increase the design difficulty and manufacturing cost of the entire system.

[0006] Thirdly, a heat dissipation material is applied or pasted inside the controller housing, and by dissipating heat to reduce the internal temperature difference, the purpose of suppressing the generation of condensation is achieved. However, the heat dissipation material is not only expensive, but also the application and pasting processes are complex and cumbersome.

[0007] Fourthly, by collecting the humidity data outside and inside the motor controller, and accurately calculating the actual dew point temperature according to relevant algorithms, once the set threshold is reached, the vehicle's on-board air conditioner is immediately controlled to introduce dry air flow into the motor controller to achieve the dehumidification function. This design increases the design complexity of the controller. At the same time, the device involved has a complex structure and high maintenance difficulty in the later stage.

[0008] Fifthly, a heating resistor is arranged inside the controller to make it heat up synchronously with the electrical components, thereby reducing the temperature difference between different regions inside the box and blocking the formation of condensation in principle. However, this design not only makes the internal structure of the controller more complex, but may also have a negative impact on the overall performance of the controller due to the additional power consumption and heat dissipation requirements of the heating resistor. Summary of the Invention

[0009] In view of this, the present invention aims to provide an anti-condensation structure that is conducive to controlling the upper limit of air humidity in electrical components and can effectively prevent the generation of condensation.

[0010] To achieve the above object, the technical solution of the present invention is realized as follows:

[0011] An anti-condensation structure is applied to an electrical component. The anti-condensation structure includes a ventilation device provided on the electrical component and a detection device provided inside the electrical component.

[0012] The ventilation device has a first channel and a second channel provided separately. Both the first channel and the second channel communicate the inside of the electrical component with the outside. The first channel is provided with a first control part and a detection part, and the second channel is provided with a second control part and a drying part.

[0013] The first control part is used to control the on-off of the first channel, the detection part is used to detect the air entering the electrical component through the first channel, the second control part is used to control the on-off of the second channel, and the drying part is used to dry the gas flowing through the second channel.

[0014] The detection device is used to detect the air inside the electrical component.

[0015] Further, a first waterproof and breathable structure is provided in the first channel between the detection part and the first control part; and / or

[0016] A second waterproof and breathable structure and a third waterproof and breathable structure are provided in the second channel, and the drying part and the second control part are located between the second waterproof and breathable structure and the third waterproof and breathable structure.

[0017] Further, one end of the first channel and / or the second channel communicating with the outside is provided with a cover plate, and a plurality of communication ports are provided on the side of the cover plate facing the electrical component.

[0018] The plurality of communication ports are arranged in sequence along the circumferential direction of the cover plate, and the first channel and the second channel communicate with the outside through the corresponding communication ports.

[0019] Furthermore, the ventilation device includes a first ventilation device and a second ventilation device respectively arranged on the electrical component. The first channel is formed in the first ventilation device, and the second channel is formed in the second ventilation device.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] For the anti-condensation structure of the present invention, by providing a first channel and a second channel on the ventilation device, and a first control part and a detection part are arranged in the first channel, and a second control part and a drying part are arranged in the second channel. The first channel can be used to detect the air state entering the electrical component. The external air conditions are monitored in real time through the detection part, providing data support for subsequent control. The second channel is used to actively adjust the air humidity entering the electrical component. The air is dried through the drying part to ensure that the air humidity entering the electrical component is lower than the dew point. The presence of the drying part enables the second channel to dry the flowing air, reducing the air humidity, thereby avoiding excessive humidity inside the electrical component.

[0022] Thus, when the detection device or the detection part finds that the air humidity inside or outside the electrical component is too high, the system can open the second channel through the second control part to introduce dry air and actively reduce the internal humidity. Moreover, the detection device and the detection part can monitor the air state inside and outside the electrical component in real time to judge whether there is a condensation risk. And when a condensation risk is detected, the system can dynamically adjust the on-off of the first channel and the second channel through the first control part and the second control part to control the air flow and humidity adjustment, and actively avoid the formation of condensation.

[0023] Therefore, the anti-condensation structure of the present invention can effectively reduce the possibility of condensation generated inside the electrical component and effectively protect the electrical component from the harm of condensation.

[0024] Secondly, by providing a first waterproof and breathable structure between the detection part and the first control part in the first channel, it is possible to prevent external liquid water from pouring into the interior of the electrical component. At the same time, it also allows air to pass through normally for the detection part to detect, and blocks the liquid water outside, avoiding direct damage such as short circuit and corrosion to the electrical component. By arranging the drying part and the second control part between the second waterproof and breathable structure and the third waterproof and breathable structure, it can block the direct impact of the liquid water in the external environment on the drying part and ensure that the entering gas enters the drying part in a gaseous form in an orderly manner, extending the service life of the drying part.

[0025] Furthermore, by providing a cover plate at the end of the first channel and / or the second channel that communicates with the outside, and a plurality of communication ports arranged in sequence along the circumference of the cover plate. Thus, the cover plate can effectively block large-particle dust, debris, and some splashing water droplets from the outside, preventing them from directly entering the interior of the channel, and further preventing these foreign objects from damaging components such as the detection unit, control unit, and drying unit inside the channel. In addition, the plurality of communication ports facilitate improving the uniformity and efficiency of air exchange. Moreover, the presence of the plurality of communication ports enables outside air to enter the channel from different angles and directions. Compared with a single opening, this decentralized air intake method can introduce air more evenly, reducing the problem of airflow instability caused by too fast or too slow local air intake.

[0026] In addition, by making the air permeable device include a first air permeable device and a second air permeable device respectively provided on the electrical component, the two air permeable devices are independent of each other, which is convenient for modular assembly in the production and manufacturing process, improves production efficiency, reduces costs, and also provides convenience for later maintenance and upgrading. One of the air permeable devices can be flexibly replaced or optimized according to actual needs.

[0027] In addition, the present invention also relates to an anti-condensation method applied to an electrical component, and the method includes:

[0028] Detecting the air entering the electrical component by the detection unit, and detecting the air inside the electrical component by the detection device;

[0029] According to the detection signal of the air entering the electrical component and the detection signal of the air inside the electrical component, controlling the first control unit and the second control unit to execute a preset control strategy.

[0030] Further, the detection signal of the detection unit includes at least one of the temperature, humidity, and pressure of the air flowing through the first channel;

[0031] The detection signal of the detection device includes at least one of the temperature, humidity, and pressure of the air inside the electrical component.

[0032] Further, when the humidity of the air entering the electrical component is not greater than the preset condensation humidity threshold, controlling the first control unit to open the first channel and the second control unit to close the second channel;

[0033] When the humidity of the air entering the electrical component is greater than the preset condensation humidity threshold, determining whether the difference between the pressure of the air entering the electrical component and the pressure of the air inside the electrical component is greater than the preset pressure difference threshold, and when the difference is greater than the preset pressure difference threshold, controlling the first control unit to close the first channel and the second control unit to open the second channel.

[0034] Further, when the humidity of the air entering the electrical component is greater than the preset condensation humidity threshold, before determining whether the difference between the pressure of the air entering the electrical component and the pressure of the air inside the electrical component is greater than the preset pressure difference threshold, the control strategy further includes:

[0035] Controlling the first control unit to close the first channel and the second control unit to close the second channel.

[0036] Further, when the humidity of the air inside the electrical component reaches the preset humidity threshold, a preset warning message is output.

[0037] The anti-condensation method of the present invention realizes the coordinated monitoring of the internal and external air environments by setting a detection unit at the air inlet and equipping a detection device inside the electrical component. The detection unit checks key parameters such as the temperature, humidity, and pressure of the incoming air, and can identify potential condensation risks at the beginning of the air entry, preventing condensation from the source. The internal detection device continuously tracks the internal air state during the operation of the electrical component.

[0038] In addition, based on the detected different signals, the first control unit and the second control unit are flexibly controlled to execute preset strategies, enabling the method to be adjusted in real time according to the actual working conditions. Moreover, instead of taking remedial measures only after the condensation phenomenon has occurred, the condensation risk is predicted in advance by virtue of continuous and accurate detection and active and flexible control. By means of timely blocking the inflow of high-humidity air, the generation of condensation conditions can be prevented, effectively protecting the internal circuits and components of the electrical component from condensation erosion and greatly reducing the probability of failures caused by condensation.

[0039] In addition, when the humidity of the air entering the electrical component is not greater than the preset condensation humidity threshold, at this time the external air humidity is in a relatively safe range. Opening the first channel by the first control unit allows the air to enter smoothly, maintaining the air pressure balance inside and outside the electrical component. At the same time, controlling the second control unit to close the second channel can reduce the unnecessary consumption of the drying unit and is beneficial to extending its service life.

[0040] When the humidity of the air entering the electrical component is greater than the preset condensation humidity threshold, once the high-humidity situation is detected, it is immediately determined whether the difference between the pressure of the incoming air and the pressure of the air inside the electrical component is greater than the preset pressure difference threshold. When the difference is greater than the preset pressure difference threshold, it means that the pressure difference inside and outside the electrical component is unbalanced. Therefore, by controlling the first control unit to close, the high-humidity and high-pressure risk air from the outside can be blocked. At the same time, the second control unit is opened, and the drying unit of the second channel is used to dry the air, introducing relatively stable dry air to balance the internal humidity, relieve the condensation pressure caused by high humidity, ensure the pressure difference balance inside and outside the electrical component, and effectively resist the condensation risk.

[0041] Secondly, when the air humidity entering the electrical component reaches greater than the preset condensation humidity threshold, before judging the air pressure difference, the first control unit is controlled to close the first channel, and the second control unit is controlled to close the second channel, which can avoid a large amount of high-humidity air from surging into the interior of the electrical component in a short time to the greatest extent, and can effectively avoid the risk of condensation.

[0042] When the air humidity inside the electrical component meets the preset humidity requirement, corresponding warning information is output. At this time, it not only means the risk of condensation, but also reflects that the current working state of the desiccant is worrying. It is very likely that it has approached or exceeded its effective moisture absorption capacity range and can no longer fully play the ideal drying role, which has the function of prompting to replace the desiccant.

[0043] In addition, the present invention also relates to a vehicle, and the electrical component in the vehicle is applied with the anti-condensation structure as described above.

[0044] For the vehicle of the present invention, by setting the anti-condensation structure as described above on the electrical component, it can remind the driver and passengers or maintenance personnel to pay attention to the state of the electrical component, and even prompt to replace the desiccant, and prevent the failure caused by condensation in advance. Thus, the maintenance frequency caused by electrical failures can be effectively reduced, and the overall performance and service life of the vehicle can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0046] Figure 1 is the application state diagram of the anti-condensation structure according to the embodiment of the present invention;

[0047] Figure 2 is the schematic structural diagram of the first ventilation device according to the embodiment of the present invention;

[0048] Figure 3 is the schematic structural diagram of the first ventilation device from another perspective according to the embodiment of the present invention;

[0049] Figure 4 is Figure 3 the cross-sectional view taken along line A-A in ;

[0050] Figure 5 is the schematic structural diagram of the first substrate according to the embodiment of the present invention;

[0051] Figure 6 is the cross-sectional view of the first substrate according to the embodiment of the present invention;

[0052] Figure 7 is the schematic structural diagram of the second ventilation device according to the embodiment of the present invention;

[0053] Figure 8 Schematic diagram of the second ventilation device according to an embodiment of the present invention from another perspective;

[0054] Figure 9 Cross-sectional view of the second ventilation device according to an embodiment of the present invention;

[0055] Figure 10 Control logic diagram of the anti-condensation method according to an embodiment of the present invention;

[0056] Figure 11 Exemplary flowchart of the anti-condensation method according to an embodiment of the present invention.

[0057] Description of reference numerals:

[0058] 1. Motor controller; 2. First ventilation device; 3. Second ventilation device; 4. Sealing ring; 5. First filter screen; 6. First waterproof and breathable structure; 7. First solenoid valve; 8. Detection unit; 9. Second solenoid valve; 10. Desiccant; 11. Third waterproof and breathable structure; 12. Second filter screen; 13. Second waterproof and breathable structure;

[0059] 200. First channel; 201. First base; 202. First cover plate;

[0060] 2011. First protrusion; 2012. First convex ring; 2013. First step; 2014. Second step;

[0061] 300. Second channel; 301. Second base; 302. Second cover plate;

[0062] 3011. First sunken platform; 3012. Second sunken platform; 3013. Third sunken platform. Detailed implementation manners

[0063] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0064] In the following description, for the purpose of illustration rather than limitation, specific details such as specific system architectures and technologies are presented in order to provide a thorough understanding of the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0065] In the description of the present invention, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0066] In addition, in the description of the present invention, unless otherwise clearly defined, the cooperating device parts can be connected by conventional connection structures in the art. Moreover, the terms "installation", "connection", "connection", "connection parts" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication of the devices within two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific situations.

[0067] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connection parts" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication of the devices within two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific situations.

[0068] The present invention will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0069] Embodiment 1

[0070] In the related art, for in-vehicle electrical appliances, taking the motor controller 1 in a vehicle as an example, usually the motor controller 1 exchanges air with the outside through a breather valve. When the internal humidity is too high, condensation is likely to occur during the working process. The water droplets generated by the condensation will not only corrode the PCB circuit and cause a short circuit, but also reduce the electrical clearance of the high-voltage components, leading to serious problems such as sparking failure. At present, although there are several methods to prevent condensation inside the controller, there are usually disadvantages such as difficult maintenance, complex design, high cost, and mostly passive prevention.

[0071] Therefore, this embodiment particularly proposes an anti-condensation structure, which is applied to electrical components such as the motor controller 1, etc., so as to facilitate real-time detection of the condensation risk inside the electrical components and actively control the upper limit of the internal air humidity, effectively preventing the generation of condensation.

[0072] In terms of the overall structure, the anti-condensation structure of this embodiment includes a ventilation device provided on the electrical component and a detection device provided inside the electrical component. Among them, the ventilation device has a first channel 200 and a second channel 300 which are separately arranged. Both the first channel 200 and the second channel 300 communicate the inside of the electrical component with the outside. And a first control part and a detection part 8 are provided in the first channel 200, and a second control part and a drying part are provided in the second channel 300. The first control part is used to control the on-off of the first channel 200, the detection part 8 is used to detect the air entering the electrical component through the first channel 200, the second control part is used to control the on-off of the second channel 300, and the drying part is used to dry the gas flowing through the second channel 300. The detection device is used to detect the air inside the electrical component.

[0073] For the anti-condensation structure of this embodiment, by providing the first channel 200 and the second channel 300 in the ventilation device, the first channel 200 can be used to detect the air state entering the electrical component. The detection part 8 monitors the external air conditions in real time, providing data support for subsequent control. The second channel 300 is used to actively adjust the air humidity entering the electrical component. The drying part dries the air to ensure that the air humidity entering the electrical component is lower than the dew point. In addition, the presence of the drying part enables the second channel 300 to dry the air flowing through it, reducing the air humidity, thereby avoiding too high humidity inside the electrical component.

[0074] Thus, when the detection device or the detection part 8 finds that the air humidity inside or outside the electrical component is too high, the system can open the second channel 300 through the second control part, introduce dry air, actively reduce the internal humidity, and maintain the air pressure balance inside and outside the electrical component. The detection device and the detection part 8 can monitor the air states inside and outside the electrical component in real time, and judge whether there is a condensation risk. And when a condensation risk is detected, the system can dynamically adjust the on-off of the first channel 200 and the second channel 300 through the first control part and the second control part, control the air flow and humidity adjustment, and actively avoid the formation of condensation. Therefore, the anti-condensation structure of this embodiment can not only actively reduce the humidity through the drying part, but also monitor the internal environment in real time through the detection device, realizing the dual functions of prevention and intervention, effectively reducing the possibility of condensation generation inside the electrical component, and effectively protecting the electrical component from the harm of condensation.

[0075] Based on the above overall design concept, an exemplary structure of the anti-condensation structure of this embodiment is referred to Figure 1 as shown in, and it is still described by taking the electrical component as the motor controller 1 as an example.

[0076] It can be understood that this anti-condensation structure can be used not only on the motor controller 1, but also on other electrical components with a condensation risk. In this embodiment, as a preferred implementation manner, such asFigure 1 As shown in , the air permeable device includes a first air permeable device 2 and a second air permeable device 3 respectively arranged on the electrical device, a first channel 200 is formed in the first air permeable device 2 , and a second channel 300 is formed in the second air permeable device 3 .

[0077] Among them, the first ventilation device 2 mainly controls the outside air to enter the electrical device. The internal first channel 200 cooperates with the first control unit, the detection unit 8 and the waterproof and breathable structure to accurately monitor and filter the air according to temperature, humidity and pressure. Only the air with low condensation risk can enter the subsequent process. Once the detection unit 8 or the first channel 200 fails, it can be quickly located and repaired without interfering with the core operation of the anti-condensation system. The second ventilation device 3 mainly plays the role of drying and secondary protection. Its built-in drying unit dehumidifies the humid air entering or circulating inside, and cooperates with the second control unit to maintain the dry environment inside the electrical device. When the humidity of the outside air is high, the second ventilation device 3 can be used to intake air to maintain the balance of air pressure inside and outside the electrical device. Therefore, the two ventilation devices are independent of each other, which is convenient for modular assembly during production and manufacturing, which can not only improve efficiency and reduce costs, but also bring convenience to later maintenance and upgrading, and can flexibly replace and optimize one of them as needed. In addition, the detection parameters of the above-mentioned detection unit 8 include at least one of the temperature, humidity and pressure of the air flowing through the first channel 200. Moreover, as a preferred embodiment, the detection unit 8 of this embodiment can simultaneously detect the temperature, humidity and pressure of the air in the first channel 200. Moreover, a temperature sensor, a humidity sensor and a pressure sensor arranged separately can be provided in the first channel 200. Alternatively, a sensor integrating a temperature sensor, a humidity sensor and a pressure sensor in the first channel 200 is generally referred to as a temperature, humidity and pressure three-in-one sensor.

[0078] Similarly, the detection parameters of the above-mentioned detection device include at least one of the temperature, humidity and pressure of the air inside the electrical device. And, in order to improve the use effect, as a preferred embodiment, the detection device of this embodiment can also detect the temperature, humidity and pressure inside the motor controller 1 at the same time. And, specifically, a temperature sensor, a humidity sensor and a pressure sensor arranged separately can be set in the motor controller 1. Alternatively, a temperature, humidity and pressure three-in-one sensor integrating a temperature sensor, a humidity sensor and a pressure sensor is set in the motor controller 1.

[0079] In addition, similar to the prior art, the first control unit and the second control unit are integrally connected through a communication control line and a detection device inside the motor controller 1 for information acquisition and calculation and for controlling the on / off of the first control unit and the second control unit. The first control unit in this embodiment is specifically a first solenoid valve 7 provided in the first channel 200, and a mature and conventional structure on the market can meet the requirements for this solenoid valve. The second control unit is a second solenoid valve 9 provided in the second channel 300, and a conventional structure can also be used for it. Since the solenoid valve mainly controls the opening and closing by the current passing through the excitation coil to cause suction, specifically in terms of the structure, wire grooves can be respectively provided on the inner walls of the first channel 200 and the second channel 300 for the wire harnesses connected to the first solenoid valve 7 and the second solenoid valve 9 to pass through, and sealant is applied for sealing.

[0080] Among them, the first air-permeable device 2 and the second air-permeable device 2 can be installed on the casing of the motor controller 1, and the above-mentioned detection device and solenoid valve controller are integrated on the control board. The detection device is used to collect the temperature, humidity and air pressure inside the motor controller 1, and can transmit the data to the MCU on the control board to calculate and analyze the condensation threshold of the internal environment of the motor controller 1 in real time. The motor controller 1, the solenoid valve controller, the first solenoid valve 7 and the second solenoid valve 9 on the control board are connected through wire harnesses to achieve the purpose of controlling the opening and closing of the first solenoid valve 7 and the second solenoid valve 9, and using the detection unit 8 to collect the temperature, humidity and air pressure outside the controller and feed back the collected data to the control board MCU.

[0081] In addition, in some other embodiments, a first waterproof and air-permeable structure 6 is provided in the first channel 200 between the detection unit 8 and the first control unit. By providing the first waterproof and air-permeable structure 6, it is possible to prevent the possible liquid water in the outside world from directly pouring into the interior of the electrical components without being monitored by the detection unit 8. And the first waterproof and air-permeable structure 6 can, by virtue of its special microporous structure or hydrophobic material, allow air to pass through normally for the detection unit 8 to detect, but block the liquid water outside to avoid direct damage such as short circuit and corrosion to the electrical components.

[0082] In addition, a second waterproof and air-permeable structure 13 and a third waterproof and air-permeable structure 11 are provided in the second channel 300, and the drying unit and the second control unit are located between the second waterproof and air-permeable structure 13 and the third waterproof and air-permeable structure 11. Among them, the second waterproof and air-permeable structure 13 is arranged near the air inlet end of the channel, and its primary function is to block the direct impact of the liquid water in the external environment on the drying unit. The drying unit usually relies on specific moisture absorption or dehumidification materials to function. If it is soaked or overly moistened by liquid water, not only will the drying efficiency be reduced, but it may even fail. The second waterproof and air-permeable structure 13 can ensure that the incoming gas enters the drying unit in a gaseous form in an orderly manner, extending the service life of the drying unit.

[0083] The third waterproof and breathable structure 11 is located behind the drying part and the second control part, close to the inside of the electrical component. Its existence prevents liquid splashes, condensed water droplets, etc. generated accidentally inside the electrical component from flowing back into the drying part and the front section of the second channel 300, avoiding interference with the drying process and the normal opening and closing actions of the second control part. At the same time, when the second control part is closed, the third waterproof and breathable structure 11 maintains the air pressure balance between the inside of the electrical component and a small part of the space at the rear end of the second channel 300, ensuring the stability of the entire structure under different working conditions and further enhancing the comprehensive effect of anti-condensation.

[0084] Among them, the first waterproof and breathable structure 6, the second waterproof and breathable structure 13, and the third waterproof and breathable structure 11 can all adopt conventional waterproof and breathable membranes. This kind of waterproof and breathable membrane is made based on mature and widely used material science principles. It has a unique microporous structure, and the sizes of these micropores are precisely controlled within the range allowing air molecules to pass freely, thus ensuring smooth gas exchange in the first channel 200 and enabling fresh outside air to reach the detection part 8 smoothly, providing guarantee for subsequent accurate monitoring. And the drying part can adopt conventional desiccant 10, for example, silica gel desiccant 10, montmorillonite desiccant 10, or other desiccants 10. At this time, a second filter screen 12 can be further arranged on the side of the third waterproof and breathable structure 11 close to the inside of the motor controller 1.

[0085] Among them, in combination with Figures 2 to 4 As shown in, as a preferred embodiment, in this embodiment, at the end of the first channel 200 and / or the second channel 300 communicating with the outside, there is a cover plate, and a plurality of communication ports located on the side of the cover plate facing the electrical component. And the plurality of communication ports are arranged in sequence along the circumferential direction of the cover plate, and the first channel 200 and the second channel 300 communicate with the outside through the corresponding communication ports.

[0086] In this embodiment, the cover plate arranged at the end of the first channel 200 communicating with the outside can block large dust particles, sundries, and some splashing water droplets from the outside, preventing them from entering the channel and damaging or blocking precision components such as the detection part 8, the control part, and the drying part, and ensuring the stable and precise operation of each component. And the plurality of communication ports arranged circumferentially on the side of the cover plate facing the electrical component have the functions of improving the uniformity of air exchange and buffering protection. On the one hand, the multi-directional communication ports can disperse the intake air, enabling the air to enter evenly, reducing unstable air flow, and avoiding uneven intake air. On the other hand, in case of extreme situations such as strong wind carrying dust and heavy rain impact, the communication ports can disperse the pressure, preventing a large amount of foreign objects from pouring in, and together with the cover plate, enhancing the ability of the anti-condensation structure to cope with complex environments and protecting the electrical component from being damaged by condensation.

[0087] Here, for the sake of distinction, the cover plate provided on the first ventilation device 2 is called "the first cover plate 202", and the communication port communicating with the first channel 200 is called "the first communication port". Specifically, asFigures 2 to 4 As shown, the first ventilation device 2 of this embodiment is generally cylindrical, and the first channel 200 extends axially to one end. And, in combination with Figures 4 to 6 As shown, the first ventilation device 2 includes a first base body 201 formed with a first channel 200. One end of the first base body 201 is provided with a plurality of first protrusions 2011 protruding axially along the first channel 200. The cover body is disposed on the first protrusions 2011 and encloses the above-mentioned first communication port with the first base body 201. In addition, as Figure 5 As shown, at one end of the first base body 201 where the communication port is provided, a first convex ring 2012 protruding axially along it is provided. And, further, a first filter screen 5 is provided on the first convex ring 2012 to protect the sensor in the first channel 200.

[0088] Among them, as a preferred embodiment, as Figure 5 As shown, the first protrusions 2011 are three evenly distributed circumferentially along the first channel 200. Of course, the number of the first protrusions 2011 can be adjusted accordingly according to specific design requirements. In addition, as a preferred implementation manner, the first cover plate 202 of this embodiment is connected to the first base body 201 by snap connection. And as a specific embodiment, as Figure 5 and Figure 6 As shown, a clamping groove is provided on the first protrusion 2011 of the first base body 201, and a clamping buckle corresponding to the clamping groove is provided on the first cover plate 202. Among them, both the clamping groove and the clamping buckle can adopt conventional structures in the art. In this embodiment, by connecting the first cover plate 202 to the first base body 201 by snap connection, it is convenient to disassemble the cover body to repair and replace the components in the first channel 200. Of course, in addition to connecting the first cover plate 202 to the first base body 201 by snap connection, other conventional methods can also be used for connection.

[0089] In addition, as Figure 6 As shown, to facilitate the setting of the detection part 8 and the first control part in the first channel 200, a first step 2013 and a second step 2014 are provided on the first base body 201 at intervals. And the first step 2013 is for the detection part 8, and the second step 2014 is for setting the first control part (that is, the first solenoid valve 7 in this embodiment). Among them, in specific implementation, to ensure the sealing performance, sealant can be applied to the outer side and the bottom side of the first solenoid valve 7 and adhered to the first base body 201. In addition, as a preferred embodiment, as Figure 5 and Figure 6 As shown, one end of the first base body 201 is reduced in diameter and provided with an external thread. The first ventilation device 2 of this embodiment is specifically screwed onto the motor controller 1 through the external thread, and a sealing ring 4 is clamped between the two.

[0090] And as a preferred embodiment, the structure of the second air-permeable device 3 in this embodiment is combined Figure 8 and Figure 9 As shown in, its overall structure is the same as that of the first air-permeable device 2, and also includes a second base body 301 formed with a second channel 300, and a second cover plate 302 provided on the second base body 301. Moreover, the second cover plate 302 is also connected to the second base body 301 by snap connection. Additionally, as Figure 9 shown in, a first sunk platform 3011, a second sunk platform 3012, and a third sunk platform 3013 are arranged at intervals along the axial direction in the second channel 300. Among them, the second control part of the second solenoid valve 9 is arranged on the first sunk platform 3011, and the desiccant 10 is arranged between the first sunk platform 3011 and the second sunk platform 3012. And the second waterproof and breathable structure 13 is bonded to the second convex ring, and the third waterproof and breathable structure 11 is arranged on the third sunk platform 3013.

[0091] It should be noted that, in addition to arranging the first channel 200 and the second channel 300 on the first air-permeable device 2 and the second air-permeable device 3 respectively, both of them can also be formed on one air-permeable device. Additionally, in addition to screwing the first air-permeable device 2 and the second air-permeable device 3 to the housing of the motor controller 1, other conventional methods can also be used to arrange the two on the housing of the motor controller 1.

[0092] The anti-condensation structure of this embodiment, by adopting the above structure, can dynamically adjust the on-off of the first channel 200 and the second channel 300 through the first control part and the second control part, control the air flow and humidity adjustment, and actively avoid the formation of condensation. Therefore, the anti-condensation structure of this embodiment can effectively reduce the possibility of condensation generated inside the motor controller 1 and effectively protect the motor controller 1 from the harm of condensation.

[0093] In addition, this embodiment also relates to an anti-condensation method based on the above anti-condensation structure. In the overall design, this method includes:

[0094] Step S1: Detect the air entering the electrical component through the detection part 8, and detect the air inside the electrical component through the detection device;

[0095] Step S2: According to the detection signal of the air entering the electrical component and the detection signal of the air inside the electrical component, control the first control part and the second control part to execute a preset control strategy.

[0096] Specifically, the anti-condensation method of this embodiment, first, by respectively using the detection unit 8 and the detection device in step S1, can realize all-round monitoring of the air environment inside and outside the electrical device. The detection unit 8 mainly detects the intake air in the first channel 200, and can identify the condensation hazards that may be carried by the outside air in advance, and control the risk from the source. The internal detection device can track the subtle changes in the internal air during the operation of the electrical device in real time, ensuring that the internal environment is always under monitoring to prevent the risk of condensation.

[0097] Secondly, based on the comprehensive detection signal obtained in step S1, step S2 controls the first control unit and the second control unit to execute the preset strategy, showing good dynamic adaptability. When the humidity of the outside air rises suddenly and the temperature drops, the detection unit 8 detects a high condensation risk signal, and the first control unit responds immediately and decisively closes the first channel 200 to prevent the invasion of humid and cold air. This control method, which is precisely adjusted according to the real-time situation, always keeps the condensation risk to a minimum and ensures that the electrical components can adapt to complex and changeable working conditions.

[0098] The detection signal of the detection unit 8 includes at least one of the temperature, humidity and pressure of the air flowing through the first channel 200. The detection signal of the detection device includes at least one of the temperature, humidity and pressure of the air inside the electrical device. When the air temperature remains unchanged, as the air humidity increases, the temperature difference between the dew point temperature and the air temperature will decrease, and condensation is likely to occur at this time. Therefore, keeping the air humidity inside the electrical device below the dew point threshold of the current air temperature can effectively avoid condensation inside the controller.

[0099] To this end, in order to improve the anti-condensation effect, as a preferred embodiment, the detection signal of the detection unit 8 includes the temperature, humidity and pressure of the air in the first channel 200, and accordingly, the detection signal of the detection device includes the temperature, humidity and pressure of the air of the electrical device.

[0100] Among them, as a preferred embodiment, the above control strategy of this embodiment includes:

[0101] When the humidity of the air entering the electrical device is not greater than the preset condensation humidity threshold, the first control unit is controlled to open the first channel 200 and the second control unit is controlled to close the second channel 300;

[0102] When the humidity of the air entering the electrical device is greater than the preset condensation humidity threshold, it is determined whether the difference between the pressure of the air entering the electrical device and the pressure of the air inside the electrical device is greater than the preset pressure difference threshold, and when the difference is greater than the preset pressure difference threshold, the first control unit is controlled to close the first channel 200 and the second control unit to open the second channel 300.

[0103] Because when the air humidity entering the electrical component is not greater than the preset condensation humidity threshold, it indicates that the external air is relatively dry and safe. At this time, controlling the first control unit to open the first channel 200 can ensure the normal air circulation of the electrical component, meet the operation requirements such as heat dissipation and internal and external pressure difference balance. At the same time, closing the second control unit and the second channel 300 can avoid unnecessary energy consumption and complex air flow disturbances, maintain the internal stable environment, and also save the consumption of the desiccant 10 and extend its service life.

[0104] Therefore, in this control strategy, through the close cooperation of the first control unit and the second control unit, and the multi-parameter feedback linkage based on humidity and pressure, the corresponding control actions can be quickly triggered, which can greatly improve the reliability and effectiveness of anti-condensation.

[0105] Among them, the preset condensation humidity threshold can be set with different temperature and humidity combinations in an experimental chamber that simulates the actual working environment of the electrical component. For example, to simulate the hot and humid environment in the tropics, set the temperature to 35°C and gradually increase the humidity from 60% RH; to simulate the cold and dry environment, set the temperature to -5°C and start changing the humidity from 20% RH. By observing whether condensation appears on the surface of the electrical component at different humidities, record the humidity value that triggers condensation. Through a large number of experimental tests under different working conditions, statistically analyze the condensation humidity critical values under different conditions.

[0106] For the setting of the preset pressure difference threshold, multiple groups of different air pressure difference scenarios can be set in a professional experimental chamber that simulates various actual environments, and variables such as temperature and humidity can be accurately controlled at the same time to simulate working conditions such as a sudden drop in external air pressure and a sudden change in air pressure caused by the temperature difference between indoors and outdoors during a strong wind and heavy rain weather. Observe whether condensation appears on the surface of the electrical component and at key internal parts, the formation speed and severity of condensation, etc. under these different air pressure difference conditions, and record the data in detail. Through a large number of repeated experiments, statistically analyze the air pressure difference value at which the risk of condensation significantly increases under different working conditions, so as to obtain the preset pressure difference threshold.

[0107] As a further implementation method, in the anti-condensation method of this embodiment, when the humidity of the air entering the electrical component is greater than the preset condensation humidity threshold, before judging whether the difference between the pressure of the air entering the electrical component and the pressure of the air inside the electrical component is greater than the preset pressure difference threshold, the above control strategy may further include, for example, controlling the first control unit to close the first channel 200, and the second control unit to close the second channel 300.

[0108] With such a setting, when it is detected that the air humidity entering the electrical component has risen to be greater than the preset condensation humidity threshold, it means that the outside air carries a very high water vapor content and the condensation risk rises sharply. At this time, before judging the air pressure difference, control measures are taken to quickly instruct the first control unit to close the first channel 200, which can completely cut off the continuous influx of high-humidity outside air. At the same time, the second control unit is instructed to close the second channel 300 to prevent the originally relatively stable air environment inside the electrical component from being damaged due to communication with abnormal outside air.

[0109] Thus, on the one hand, the source of high-humidity air can be directly cut off, avoiding a large amount of water vapor from invading the inside of the electrical component in a short time and preventing the water vapor from accumulating to an extent sufficient to generate condensation. On the other hand, closing the first channel 200 and the second channel 300 is beneficial to maintaining the relative stability of the internal air pressure and ensuring the accuracy of subsequent air pressure difference judgment.

[0110] In addition, the anti-condensation method of this embodiment further includes outputting a preset warning message when the humidity of the air inside the electrical component reaches the preset humidity threshold. At this time, it not only means the condensation risk, but also reflects that the current working state of the desiccant 10 is worrying. It is very likely that it has approached or exceeded its effective moisture absorption capacity range and can no longer fully play the ideal drying role, which has the function of prompting to replace the desiccant 10.

[0111] Here, to further understand the anti-condensation method of this embodiment, in combination with Figure 11 as shown in, a specific embodiment is used for a more detailed description.

[0112] Among them, the electrical component can specifically be the motor controller 1 of Embodiment 1, and an alarm device is provided thereon. The alarm device can adopt a conventional structure, and its alarm signal can be presented in an eye-catching form combining sound and light, such as emitting a rapid beeping sound and a flashing red warning light, so that on-site personnel can capture the abnormality in the first time. Or push a detailed alarm notice to the remote monitoring center through a wireless transmission module to ensure that even if the operator is not at the equipment site, they can receive the information in time through terminals such as mobile phones and computers and understand the urgent situation that the desiccant 10 needs to be replaced.

[0113] Specifically, the first channel 200 of the first air permeable device 2 of the motor controller 1 in this embodiment is in an open state, while the second channel 300 of the second air permeable device 3 is in a closed state, and the detection unit 8 and the detection device collect data in real time.

[0114] Based on the data collection of the detection unit 8 and the detection device, as Figure 11 shown in, when the motor controller 1 in this embodiment is anti-condensation, its method includes the following steps:

[0115] S10. Control the first control unit to open the first channel 200 and control the second control unit to close the second channel 300;

[0116] S20. When the air humidity in the first channel 200 detected by the detection unit 8 is not greater than the preset humidity threshold, control the first control unit to keep the first channel 200 open and control the second control unit to close the second channel 300;

[0117] When the air humidity in the first channel 200 detected by the detection unit 8 is greater than the preset humidity threshold, control the first control unit to close the first channel 200, control the second control unit to close the second channel 300, and then execute step S30;

[0118] S30. Determine whether the difference between the pressure of the air entering the motor controller 1 detected by the detection unit 8 and the pressure of the air inside the electrical component detected by the detection device is greater than the preset pressure difference threshold;

[0119] When the difference is greater than the preset pressure difference threshold, control the first control unit to keep the first channel 200 closed and control the second control unit to open the second channel 300;

[0120] When the difference is not greater than the preset pressure difference threshold, control the first control unit to keep the first channel 200 closed and control the second control unit to keep the second channel 300 closed.

[0121] In addition, when the humidity of the air inside the electrical component detected by the detection device reaches the preset humidity threshold, output a preset warning message to replace the desiccant 10.

[0122] The anti-condensation control method of this embodiment can adjust the humidity of the air inside the electrical component by controlling the first control unit and the second control unit, thereby preventing the generation of condensation. Moreover, through the quantitative analysis of the condensation formation conditions by the detection unit 8 and the detection device and the formation of a feedback regulation mechanism, the effect of preventing condensation can be greatly improved on the premise of maintaining the air pressure balance inside and outside the electrical component.

[0123] Embodiment Two

[0124] This embodiment relates to a vehicle, and the anti-condensation structure in Embodiment One is applied to the electrical components in the vehicle.

[0125] At this time, by setting the anti-condensation structure in Embodiment One in the electrical components on the vehicle, the structure is simple, and by controlling the opening and closing of the first ventilation device 2 and the second ventilation device 3, the internal air can always be maintained in an ideal range where condensation is not likely to occur, effectively preventing the occurrence of condensation. Moreover, when the humidity of the air inside the electrical component climbs to the key node of the preset humidity requirement, the alarm device will be triggered, immediately start and quickly output the corresponding warning message.

[0126] Therefore, the vehicle of this embodiment can remind the driver and passengers or maintenance personnel to pay attention to the status of electrical components, and even prompt to replace the desiccant 10 to prevent in advance the failures caused by condensation. Thus, the maintenance frequency caused by electrical failures can be effectively reduced, and the overall performance and service life of the vehicle can be improved.

[0127] The above-described embodiments only represent the preferred embodiments of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications, improvements and substitutions can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. An anti-condensation structure, applied to an electrical device, characterized in that: It includes a venting device disposed on the electrical device, and a detection device disposed in the electrical device; The ventilation device comprises a first channel (200) and a second channel (300) which are respectively arranged, the first channel (200) and the second channel (300) both connect the interior of the electrical device with the outside, and the first channel (200) is provided with a first control unit and a detection unit (8), and the second channel (300) is provided with a second control unit and a drying unit; The first control unit is used to control the opening and closing of the first channel (200), the detection unit (8) is used to detect the air entering the electrical device through the first channel (200), the second control unit is used to control the opening and closing of the second channel (300), and the drying unit is used to dry the gas flowing through the second channel (300); The detection device is used to detect the air inside the electrical component.

2. The anti-condensation structure according to claim 1, characterized in that: The first channel (200) is provided with a first waterproof and breathable structure (6) located between the detection unit (8) and the first control unit; and / or, A second waterproof and breathable structure (13) and a third waterproof and breathable structure (11) are provided in the second channel (300), and the drying unit and the second control unit are located between the second waterproof and breathable structure (13) and the third waterproof and breathable structure (11).

3. The anti-condensation structure according to claim 1, characterized in that: The end of one end of the first channel (200) and / or the second channel (300) communicating with the outside is provided with a cover plate, and a plurality of communication ports located on a side of the cover plate facing the electrical device; The plurality of communication ports are arranged in sequence along the circumference of the cover plate, and the first channel (200) and the second channel (300) are connected to the outside through the corresponding communication ports.

4. The anti-condensation structure according to any one of claims 1 to 3, characterized in that: The air permeable device comprises a first air permeable device (2) and a second air permeable device (3) respectively arranged on the electrical device, the first channel (200) being formed in the first air permeable device (2), and the second channel (300) being formed in the second air permeable device (3).

5. An anti-condensation method, applied to electrical devices, characterized in that: The method includes: The air entering the electrical device is detected by a detection unit (8), and the air inside the electrical device is detected by a detection device; According to the detection signal of the air entering the electrical device and the detection signal of the air inside the electrical device, the first control unit and the second control unit are controlled to execute a preset control strategy.

6. The anti-condensation method according to claim 5, characterized in that: The detection signal of the detection unit (8) includes at least one of the temperature, humidity and pressure of the air flowing through the first channel (200); The detection signal of the detection device includes at least one of the temperature, humidity and pressure of the air inside the electrical component.

7. The anti-condensation method according to claim 6, characterized in that: The control strategy includes: When the humidity of the air entering the electrical device is not greater than a preset condensation humidity threshold, controlling the first control unit to open the first channel (200) and the second control unit to close the second channel (300); When the humidity of the air entering the electrical device is greater than the preset condensation humidity threshold, it is determined whether the difference between the pressure of the air entering the electrical device and the pressure of the air inside the electrical device is greater than a preset pressure difference threshold, and when the difference is greater than the preset pressure difference threshold, the first control unit is controlled to close the first channel (200) and the second control unit is controlled to open the second channel (300).

8. The anti-condensation method according to claim 7, characterized in that: In the case where the humidity of the air entering the electrical device is greater than the preset condensation humidity threshold, before determining whether the difference between the pressure of the air entering the electrical device and the pressure of the air inside the electrical device is greater than the preset pressure difference threshold, the control strategy further includes: The first control unit is controlled to close the first channel (200), and the second control unit is controlled to close the second channel (300).

9. The anti-condensation method according to claim 6, characterized in that: The method further comprises: When the humidity of the air inside the electrical device reaches a preset humidity threshold, a preset warning message is output.

10. A vehicle, characterized in that: The electric device in the vehicle is applied with the anti-condensation structure according to any one of claims 1 to 4.

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