Waterproof and oil-proof process for sensor

Abstract

The application discloses a waterproof and oil-proof process of a sensor, which comprises the following steps: providing a sensor, the sensor being provided with a plurality of welding points, and the outer edge of the sensor being provided with a groove gap; welding welding wires on the welding points, wherein the welding points and the welding wires form welding areas; providing a glue spraying device, the glue spraying device comprising a glue pipe and a glue spraying needle, the glue pipe being provided with waterproof and oil-proof glue; and the glue spraying needle spraying the waterproof and oil-proof glue to the welding points and the groove gap in sequence, so as to cover the glue on the welding points, the welding areas and the groove gap, and seal the groove gap. The waterproof and oil-proof glue is used to cover the welding points, the welding areas and the groove gap, so as to realize the insulation function, realize the function of the sensor being electrified in water or brine, avoid the water and oil entering the welding wires and causing the short circuit between the sensor and the welding wires, and prolong the service life of the sensor, and improve the safety and reliability of the sensor.

Description

Technical Field

[0001] This invention relates to the field of sensors, and more specifically to a waterproof and oil-proof process for sensors. Background Technology

[0002] Currently, with the gradual improvement of living standards, sensors are widely used due to their small size, simple structure, good performance, and low price. Therefore, the stability and reliability of their performance are particularly important. Sensors on the market (especially ECM sensors) typically function through the linkage of components such as air inlets and diaphragms on their PCBs. If liquids such as oil or water enter the sensor, it can easily cause short circuits or malfunctions. Summary of the Invention

[0003] The main objective of this invention is to provide a waterproof and oil-proof process for sensors to solve the problem that liquids such as oil and water entering the sensor can easily cause short circuits in the product.

[0004] To achieve the above objectives, the waterproof and oil-proof process for the sensor proposed in this invention includes the following steps:

[0005] A sensor is provided, wherein the sensor has multiple solder points and the outer edge of the sensor has a recessed edge gap;

[0006] Welding wires are welded to each of the said solder joints, wherein the solder joints and the corresponding welding wires form a welding area;

[0007] A glue spraying device is provided, the glue spraying device includes a glue tube and a glue spraying nozzle, and the glue tube stores waterproof and oil-proof glue;

[0008] The glue-spraying needle sequentially sprays glue onto multiple weld points and the gaps around the weld, thereby covering each weld point, each welding area, and sealing the gaps around the weld.

[0009] Preferably, the step of spraying adhesive into the plurality of weld points and the edge gaps sequentially by the adhesive spraying needle, so as to cover each of the weld points, each of the welding areas and seal the edge gaps by the adhesive, includes:

[0010] The adhesive spraying trajectory is obtained based on the distribution positions of the multiple weld points and the grooves at the edges;

[0011] The glue-spraying needle continuously sprays glue along the glue-spraying trajectory to cover each of the weld points and each of the welded areas and seal the gaps at the edges of the weld.

[0012] Preferably, the outline of the groove is a closed annular line, and the line connecting the multiple welding points is an arc.

[0013] The step of obtaining the adhesive spraying trajectory based on the distribution positions of the multiple weld points and the groove edge includes:

[0014] The arc is used as the first trajectory, the closed loop is used as the second trajectory, and the first trajectory and the second trajectory are connected to obtain the adhesive spraying trajectory.

[0015] Preferably, the number of the first trajectories is at least two;

[0016] At least two of the first tracks are sequentially connected to form a continuous curved track, and the curved track smoothly transitions and connects with the second track to form the adhesive spraying track; or,

[0017] The second trajectory includes a first arc-shaped trajectory and a second arc-shaped trajectory. The first arc-shaped trajectory is positioned close to the first trajectory. One of the first trajectories is connected to the first arc-shaped trajectory to form a continuous curved trajectory. The curved trajectory is smoothly connected to the remaining first trajectories and the second arc-shaped trajectory to form the adhesive spraying trajectory.

[0018] Preferably, after the step of obtaining the adhesive spraying trajectory based on the positional relationship of the plurality of weld points and the edge gap, the method further includes:

[0019] Detect the temperature of the adhesive at the spray nozzle;

[0020] When the temperature of the glue at the glue spray nozzle reaches the first preset temperature, the glue spray nozzle sprays out the glue.

[0021] Preferably, after the step of spraying adhesive into the plurality of weld points and the edge gaps sequentially to cover each weld point, each welding area, and the edge gaps with adhesive, and sealing the edge gaps, the method further includes:

[0022] The adhesive on the sensor is cured for a first preset time.

[0023] Preferably, the sensor has an air inlet.

[0024] Prior to the step of welding wires to each of the said solder joints, the method further includes:

[0025] A waterproof mesh is attached to the air inlet.

[0026] Preferably, the step of welding wires to each of the solder joints includes:

[0027] Dip the welding wire in flux;

[0028] Place the bonding wire at the position corresponding to the bonding point;

[0029] Molten solder balls are sprayed onto the locations of each solder joint to solder the solder wire to the solder joint.

[0030] Preferably, the flux is a water-based flux.

[0031] Preferably, after the step of dipping the solder wire in flux, the method further includes:

[0032] The water-based flux on the welding wire is heated at a second preset temperature for a second preset duration.

[0033] The waterproof and oil-proof sensor technology of this invention involves sequentially welding wires to each solder joint, through which the sensor achieves electrical connection with other components. By using a glue tube and a glue spraying needle, the needle sprays waterproof and oil-proof glue onto multiple solder joints and the gaps around the solder joints, covering each solder joint and welding area. This provides insulation, enabling the sensor to conduct electricity in water or salt water, and preventing water or oil from entering the solder wires and causing a short circuit between the sensor and the wires. Furthermore, the glue covers and seals the gaps around the solder joints, preventing water or oil from entering the sensor and causing a short circuit, thus extending the sensor's lifespan and improving its safety and reliability. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0035] Figure 1 This is a flowchart illustrating the first embodiment of the waterproof and oil-proof process for a sensor according to an embodiment of the present invention;

[0036] Figure 2 This is a flowchart illustrating the second embodiment of the waterproof and oil-proof process for a sensor according to one embodiment of the present invention.

[0037] Figure 3 This is a flowchart illustrating the third embodiment of the waterproof and oil-proof process for a sensor according to an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of the structure of a sensor according to an embodiment of the present invention;

[0039] Figure 5 This is a schematic diagram of the adhesive spraying trajectory according to an embodiment of the present invention;

[0040] Figure 6This is a schematic diagram of the adhesive spraying trajectory according to another embodiment of the present invention.

[0041] Explanation of icon numbers:

[0042] 100 sensor 161 Second trajectory 11 Gaps around the edge 1611 First arc-shaped trajectory 12 solder joint 1612 Second arc trajectory 13 wire bonding 162 First Trajectory 14 air intake 1621 First solder joint trajectory 15 Waterproof mesh 1622 Second solder joint trajectory 16 Adhesive spray trajectory

[0043] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0045] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0046] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0049] This invention provides a waterproof and oil-proof process for a sensor.

[0050] Reference Figure 1 The diagram below illustrates the first embodiment of the waterproof and oil-proof process for the sensor of the present invention. The method includes the following steps:

[0051] Step S10: Provide a sensor, the sensor having multiple solder joints and the outer edge of the sensor having a recessed edge gap;

[0052] The sensor 100 has multiple solder points 12 spaced apart. The sensor 100 achieves electrical connection with other components of the product by soldering wires 13 onto the solder points 12 to transmit signals. The outer edge of the sensor 100 has a recessed edge gap 11, which is formed between the PCB and the housing to achieve the connection between the PCB and the housing.

[0053] Step S20: Welding wires onto each of the solder joints, wherein the solder joints and the corresponding welding wires form a welding area;

[0054] Solder wires 13 are sequentially soldered onto each solder point 12, enabling the sensor 100 to be electrically connected to other components via the solder wires 13. After the solder wire 13 is soldered onto the corresponding solder point 12, a soldering area is formed at the soldering point 12 and the corresponding solder wire 13. Specifically, if a soldering iron is used, the melting solder wire will form a soldering area at the soldering point 12 and the corresponding solder wire 13; if a laser soldering machine is used, the molten solder ball will form a soldering area at the soldering point 12 and the corresponding solder wire 13.

[0055] Step S30: Provide a glue spraying device, which includes a glue tube and a glue spraying nozzle, wherein the glue tube stores waterproof and oil-proof glue.

[0056] The glue spraying device includes a glue tube and a glue spraying needle. The glue tube has a storage space to store waterproof and oil-proof glue. The storage space is connected to the glue spraying needle, and the glue in the glue tube can be sprayed onto the sensor 100 through the glue spraying needle.

[0057] In step S40, the glue spraying needle sequentially sprays glue onto the plurality of welding points and the edge gaps, so as to cover each of the welding points and each of the welding areas and seal the edge gaps with the glue.

[0058] The adhesive spray nozzle sprays adhesive, which moves the sensor 100 via the device. This causes the nozzle to sequentially spray adhesive onto multiple solder joints 12 and the edge gaps 11, covering each solder joint 12 and the welding area. This provides insulation, enabling the sensor 100 to conduct electricity in water or salt water, and preventing water or oil from entering the bonding wire 13 and causing a short circuit between the sensor 100 and the bonding wire 13. Furthermore, the adhesive covers the edge gaps 11, sealing them and preventing water or oil from entering the sensor 100 and causing a short circuit.

[0059] The waterproof and oil-proof process of the sensor 100 in this invention involves sequentially welding welding wires 13 to each solder joint 12. The sensor 100 achieves electrical connection with other components through the welding wires 13. By setting up a glue tube and a glue spraying needle, the glue spraying needle sprays waterproof and oil-proof glue onto multiple solder joints 12 and the edge gaps 11, covering each solder joint 12 and each welding area with glue, which serves as insulation. This allows the sensor 100 to conduct electricity in water or salt water, and also prevents water or oil from entering the welding wires 13 and causing a short circuit between the sensor 100 and the welding wires 13. Furthermore, the glue covers the edge gaps 11 to seal them, preventing water or oil from entering the sensor 100 through the edge gaps 11 and causing a short circuit. This extends the service life of the sensor 100 and improves its safety and reliability.

[0060] Reference Figure 2 This is a flowchart illustrating the second embodiment of the waterproof and oil-proof process for the sensor of the present invention. Based on the first embodiment described above, step S40 includes:

[0061] Step S41: Obtain the adhesive spraying trajectory based on the distribution positions of the multiple welding points and the edge gaps;

[0062] The edge gap 11 is located on the outer edge of the sensor 100, and multiple solder points 12 are distributed on the outer surface of the sensor 100. Specifically, the multiple solder points 12 are spaced apart on the outer surface of the sensor 100, that is, there is a certain distance between two adjacent solder points 12 to avoid interference or obstruction caused by the distance between two adjacent solder points 12 being too close. At the same time, it also facilitates the soldering of the bonding wire 13 to each solder point 12. According to the positional relationship between the edge gap 11 and the multiple solder points 12, a glue spraying trajectory 16 is obtained. Specifically, according to the number of solder points 12 and the distance between each solder point 12 and the edge gap 11, the starting point, ending point, and order of passing through each solder point 12 of the glue spraying trajectory 16 are determined to ensure that the edge gap 11 and the solder points 12 can be sealed after glue spraying without interfering with surrounding components, and that the glue does not overflow from the sensor 100.

[0063] In step S42, the glue-spraying needle continuously sprays glue along the glue-spraying trajectory to cover each of the weld points and each of the welding areas and seal the gaps at the edges of the weld.

[0064] The adhesive spraying needle continuously sprays adhesive along the spraying trajectory 16, ensuring a continuous and uninterrupted flow of adhesive. This enhances the adhesive's waterproof and oil-proof properties and allows for a one-time sealing of the edge gaps 11 and weld points 12, improving work efficiency. Continuous adhesive spraying covers each weld point 12, each welding area, and the edge gaps 11, sealing the edge gaps 11. This prevents water and oil from entering the sensor 100 through the weld points 12, causing a short circuit, and also prevents water and oil from entering the bonding wire 13, causing a short circuit between the sensor 100 and the bonding wire 13. Furthermore, the adhesive covers and seals the edge gaps 11, preventing water and oil from entering the sensor 100 through these gaps and causing a short circuit, thus extending the sensor 100's lifespan and improving its safety and reliability.

[0065] Specifically, the glue dispensing method of the glue spraying needle is to control the formation and frequency of the impact pin by a piezoelectric valve. The accuracy, stability and speed of glue dispensing by the piezoelectric valve are far superior to the working method of glue dispensing controlled by air pressure. The piezoelectric valve glue spraying process is stable and has precise control over the amount of glue dispensed. After the product is glued, no manual inspection is required. The final inspection of the equipment can be carried out directly after the product has cured, which improves work efficiency.

[0066] Reference Figure 4 Based on the second embodiment described above, the outline of the groove 11 is a closed annular line, and the connecting line between the plurality of welding points 12 is an arc.

[0067] Step S41 includes:

[0068] Step S411: Take the arc as the first trajectory, take the circular closed line as the second trajectory, and connect the first trajectory and the second trajectory to obtain the glue spraying trajectory.

[0069] The edge gap 11 is located on the outer edge of the sensor 100, and the outline of the edge gap 11 is a closed annular line. The width of the edge gap 11 is 0.25 mm, and the connecting lines between the plurality of solder points 12 are arc-shaped. The adhesive spraying trajectory 16 includes a second trajectory 161 and a first trajectory 162. The second trajectory 161 is connected to the first trajectory 162 so that the adhesive spraying trajectory 16 is a continuous and uninterrupted trajectory. The connecting lines between the plurality of solder points 12 are arc-shaped, and the shape of the first trajectory 162 matches the shape of the arc, so that the first trajectory 162 can cover each solder point 12 and prevent the solder points 12 from being exposed. Furthermore, the connection between the plurality of solder points 12 to form an arc makes the adhesive spraying trajectory 16 smoother, so that the adhesive spraying needle can move more stably and reliably along the adhesive spraying trajectory 16. The second trajectory 161 is an annular shape that matches the shape of the edge gap 11, so that the second trajectory 161 can cover the edge gap 11 and seal the edge gap 11.

[0070] Reference Figure 5 and Figure 6 Based on the second embodiment described above, the number of the first trajectories is at least two;

[0071] At least two of the first tracks are sequentially connected to form a continuous curved track, and the curved track smoothly transitions and connects with the second track to form the adhesive spraying track; or,

[0072] The second trajectory includes a first arc-shaped trajectory and a second arc-shaped trajectory. The first arc-shaped trajectory is positioned close to the first trajectory. One of the first trajectories is connected to the first arc-shaped trajectory to form a continuous curved trajectory. The curved trajectory is smoothly connected to the remaining first trajectories and the second arc-shaped trajectory to form the adhesive spraying trajectory.

[0073] The number of first tracks 162 is at least two, that is, the adhesive spraying track 16 passes through each solder joint 12 at least twice to ensure that the adhesive sprayed on each solder joint 12 and each connection is sufficient, to ensure that the solder joint 12 is not exposed and the solder core in the solder wire 13 is not exposed, thereby improving the waterproof and oil-proof effect, preventing water and oil from entering the sensor 100 through the solder joint 12 and causing the sensor 100 to short circuit, and also preventing water and oil from entering the solder wire 13 and causing a short circuit between the sensor 100 and the solder wire 13.

[0074] Specifically, Figure 5 and Figure 6 Taking the example of three solder joints 12 and two first trajectories 162. The two first trajectories 162 are the first solder joint trajectory 1621 and the second solder joint trajectory 1622, respectively. The second trajectory 161 includes the connected first arc trajectory 1611 and the second arc trajectory 1612.

[0075] In one embodiment, reference is made to Figure 6The first solder joint trajectory 1621 and the second solder joint trajectory 1622 are connected in sequence to form a continuous curved trajectory. The curved trajectory and the first arc trajectory 1611 and the second arc trajectory 1612 are smoothly connected in sequence to form the glue spraying trajectory 16.

[0076] The adhesive spraying trajectory 16 starts at the first weld point trajectory 1621, which passes through three weld points 12 in sequence; then comes the second weld point trajectory 1622, which passes through the three weld points 12 in sequence for the second time; then it connects the first arc-shaped trajectory 1611 and the second arc-shaped trajectory 1612 in sequence. This adhesive spraying trajectory 16 makes the first arc-shaped trajectory 1611 and the second arc-shaped trajectory 1612 continuous, which makes it easier to form a closed ring-shaped second trajectory 161 and improves the sealing performance of the edge gap 11.

[0077] In other embodiments, the number of first tracks 162 is three, four or other numbers, and multiple first tracks 162 are connected in sequence to form a continuous curved track. The curved track and the second track 161 are smoothly connected to form the adhesive spraying track 16.

[0078] In another embodiment, reference Figure 5 The first arc-shaped trajectory 1611 is set close to the first trajectory 162. The first solder point trajectory 1621 is connected to the first arc-shaped trajectory 1611 to form a continuous curved trajectory. The curved trajectory is smoothly connected to the second solder point trajectory 1622 and the second arc-shaped trajectory 1612 in sequence to form the glue spraying trajectory 16.

[0079] The adhesive spraying trajectory 16 starts at the first weld point trajectory 1621, which passes through three weld points 12 in sequence. Then, it follows a first arc-shaped trajectory 1611, returning to the starting weld point 12 along the edge gap 11. Next, it follows a second weld point trajectory 1622, passing through the three weld points 12 again. Finally, it connects with the first arc-shaped trajectory 1611, forming a closed loop. By first forming the first weld point trajectory 1621 and the first arc-shaped trajectory 1611, and then forming the second weld point trajectory 1622, the second weld point trajectory 1622 can better contact the first weld point trajectory 1621 and the first arc-shaped trajectory 1611, thus achieving comprehensive coverage of each weld point 12 and each welding area, resulting in better waterproofing and oil resistance.

[0080] In other embodiments, the number of first tracks 162 is three, four or other numbers, one of the first tracks 162 is connected to the first arc track 1611 to form a continuous curved track, and the curved track is smoothly connected to the remaining first tracks 162 and the second arc track 1612 in sequence to form the adhesive spraying track 16.

[0081] In other embodiments, the number of solder joints 12 can be flexibly adjusted according to actual needs, and the present invention does not limit the number of solder joints 12.

[0082] Reference Figure 2 Based on the second embodiment described above, after step S41, the method further includes:

[0083] Step S412: Detect the temperature of the adhesive at the spray nozzle;

[0084] Step S413: When the temperature of the glue at the glue spraying needle reaches the first preset temperature, the glue spraying needle sprays out the glue.

[0085] The adhesive is a UV adhesive, a single-component UV-curable modified acrylic structural adhesive. UV adhesives offer advantages such as water and oil resistance, fast curing, and high bonding strength. UV adhesives have a working temperature, which refers to the temperature range within which the adhesive achieves its optimal bonding effect. In this embodiment, a device is provided to detect the temperature of the adhesive at the spray nozzle. When the temperature of the adhesive at the spray nozzle reaches a first preset temperature, the spray nozzle dispenses adhesive to ensure that the dispensed adhesive is within the working temperature range and to maintain a stable amount of adhesive dispensed. Specifically, a temperature controller is provided at the spray nozzle to detect and control the temperature of the adhesive at the spray nozzle. The first preset temperature is located between the minimum and maximum values ​​of the adhesive's working temperature range; preferably, the first preset temperature is the midpoint of the adhesive's working temperature range.

[0086] Reference Figure 2 Based on the second embodiment described above, after step S40, the method further includes:

[0087] Step S50: The adhesive on the sensor is cured and the curing process continues for a first preset time.

[0088] The principle of UV adhesive curing is that the photoinitiator (or photosensitizer) in the UV-curable material absorbs ultraviolet light under ultraviolet irradiation and generates active free radicals or cations, initiating monomer polymerization, cross-linking, and grafting chemical reactions, causing the adhesive to transform from a liquid to a solid state within seconds. The adhesive on sensor 100 is cured under ultraviolet light for a first preset time. The first preset time is flexibly adjusted according to parameters such as the type and quantity of adhesive and the power of the ultraviolet lamp. Curing the adhesive on sensor 100 makes the connection between the adhesive and the solder joint 12, the adhesive and the welding area, and the adhesive and the edge gap 11 more compact and reliable, improving the waterproof and oil-proof effect.

[0089] Reference Figure 2 Based on the second embodiment described above, the sensor is provided with an air inlet.

[0090] Before step S20, the following are also included:

[0091] A waterproof mesh is attached to the air inlet.

[0092] The sensor 100 has an air inlet 14 and a diaphragm inside. When the user inhales, airflow is generated inside the sensor 100 through the air inlet 14. The diaphragm vibrates under the action of the airflow, causing a change in the capacitance of the sensor. The chip detects the change and outputs a working signal to realize the corresponding function. By attaching a waterproof mesh 15 to the air inlet 14, water, oil, and other liquids are prevented from entering the interior of the sensor 100 through the air inlet 14, which could cause a short circuit and thus extend the service life of the sensor 100.

[0093] Reference Figure 3 This is a flowchart illustrating the third embodiment of the waterproof and oil-proof process for the sensor of the present invention. Based on the first embodiment described above, step S20 includes:

[0094] Step S21: Dip the solder wire in flux;

[0095] Step S22: Place the bonding wire at the position of the corresponding solder joint;

[0096] Step S23: Molten solder balls are sprayed onto the positions of each solder joint to solder the solder wire to the solder joint.

[0097] The end of the solder wire 13 to be soldered to the solder joint 12 is dipped in flux. Flux is a chemical substance that promotes soldering. It is an indispensable auxiliary material in soldering, and its role is extremely important. After the solder wire 13 is dipped in flux, it is placed at the corresponding solder joint 12, and molten solder balls are sprayed onto each solder joint 12 to connect the solder wire 13 to the solder joint 12. After soldering with a soldering iron, rosin residue remains on the surface of the sensor 100 PCB, and the equipment does not have automatic inspection and testing functions, requiring a large number of personnel to inspect the appearance and manually test the product performance. Therefore, in this embodiment, a laser soldering machine is used instead of a traditional soldering iron soldering machine. This is not only faster and leaves no rosin residue after soldering, but also enables product self-inspection and self-testing, saving inspection and testing manpower.

[0098] Based on the third embodiment described above, the flux is a water-based flux.

[0099] In existing technologies, alcohol-based fluxes are mostly used. However, water-based fluxes have a slower evaporation rate than alcohol-based fluxes, and are also safer and more environmentally friendly, with lower requirements for exhaust gas collection and treatment.

[0100] Based on the third embodiment described above, after step S21, the method further includes:

[0101] Step S24: Heat the water-based flux on the welding wire at a second preset temperature for a second preset duration.

[0102] After the solder wire 13 is dipped in water-based flux, it is not dipped in molten solder. This is because if the solder wire 13 is dipped in the high-temperature molten solder bath after being dipped in water-based flux, the water molecules on the surface of the solder wire 13 will instantly vaporize, causing the solder in the solder bath to splatter out and stick to the surface of the solder wire 13. If the splattered solder falls off during product transportation, it will pose a short circuit risk. Therefore, the solder wire 13 is not dipped in the molten solder bath after being dipped in water-based flux. However, if solder ball soldering is performed directly after the solder wire 13 is dipped in water-based flux, the water molecules can easily vaporize when the solder ball is ejected, causing voids in the solder joint 12. Therefore, the water-based flux on the solder wire 13 is heated at a second preset temperature for a second preset duration to accelerate the evaporation of water molecules and prevent the water-based flux from causing voids in the solder joint 12 when the solder ball is ejected.

[0103] Specifically, the second preset duration is at least 0.3 ms, and the second preset temperature is achieved through a molten solder bath and a hot air gun. After the solder wire 13 is dipped in water-based flux, it remains above the molten solder bath for the second preset duration. Since the melting point of tin is 231°C, the temperature near the molten solder bath is 100°C higher than the boiling point of water molecules, which can accelerate the evaporation of water molecules. At the same time, the hot air gun is aimed at the molten solder ball, and the hot air gun blows out hot air at 150°C. Under the dual action of the molten solder bath and the hot air gun, the water-based flux accelerates the evaporation of its water molecules, preventing the water-based flux from causing voids in the solder joint 12 when the solder ball is sprayed out.

[0104] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A waterproof and oil-proof process for a sensor, characterized in that, The waterproof and oil-proof process of the sensor includes the following steps: A sensor is provided, wherein the sensor has multiple solder points and the outer edge of the sensor has a recessed edge gap; Welding wires are welded to each of the said solder joints, wherein the solder joints and the corresponding welding wires form a welding area; A glue spraying device is provided, the glue spraying device includes a glue tube and a glue spraying nozzle, and the glue tube stores waterproof and oil-proof glue; The glue-spraying needle sequentially sprays glue onto the multiple weld points and the edge gaps, so as to cover each weld point and each welding area and seal the edge gaps with the glue; The step of spraying adhesive into the multiple weld points and the edge gaps sequentially by the adhesive spraying needle, so as to cover each weld point and each welding area and seal the edge gaps with the adhesive, includes: The adhesive spraying trajectory is obtained based on the distribution positions of the multiple weld points and the grooves at the edges; The glue-spraying needle continuously sprays glue along the glue-spraying trajectory to cover each of the weld points and each of the weld areas and seal the gaps at the edges of the weld. The outline of the groove is a closed loop, and the line connecting the multiple welding points is an arc. The step of obtaining the adhesive spraying trajectory based on the distribution positions of the multiple weld points and the groove edge includes: The arc is used as the first trajectory, the closed loop is used as the second trajectory, and the first trajectory and the second trajectory are connected to obtain the adhesive spraying trajectory; The number of the first trajectories is at least two; At least two of the first tracks are sequentially connected to form a continuous curved track, and the curved track smoothly transitions and connects with the second track to form the adhesive spraying track; or, The second trajectory includes a first arc-shaped trajectory and a second arc-shaped trajectory. The first arc-shaped trajectory is positioned close to the first trajectory. One of the first trajectories is connected to the first arc-shaped trajectory to form a continuous curved trajectory. The curved trajectory is smoothly connected to the remaining first trajectories and the second arc-shaped trajectory to form the adhesive spraying trajectory.

2. The waterproof and oil-proof process for the sensor as described in claim 1, characterized in that, After obtaining the adhesive spraying trajectory based on the positional relationship of the multiple weld points and the edge gap, the method further includes: Detect the temperature of the adhesive at the spray nozzle; When the temperature of the glue at the glue spray nozzle reaches the first preset temperature, the glue spray nozzle sprays out the glue.

3. The waterproof and oil-proof process for the sensor as described in any one of claims 1 to 2, characterized in that, After the step of spraying adhesive into the plurality of weld points and the edge gaps sequentially to cover each weld point, each welding area and the edge gaps with adhesive, and sealing the edge gaps, the method further includes: The adhesive on the sensor is cured for a first preset time.

4. The waterproof and oil-proof process for the sensor as described in any one of claims 1 to 2, characterized in that, The sensor has an air inlet. Prior to the step of welding wires to each of the said solder joints, the method further includes: A waterproof mesh is attached to the air inlet.

5. The waterproof and oil-proof process for the sensor as described in any one of claims 1 to 2, characterized in that, The step of welding wires to each of the said solder joints includes: Dip the welding wire in flux; Place the bonding wire at the position corresponding to the bonding point; Molten solder balls are sprayed onto the locations of each solder joint to solder the solder wire to the solder joint.

6. The waterproof and oil-proof process for the sensor as described in claim 5, characterized in that, The flux is a water-based flux.

7. The waterproof and oil-proof process for the sensor as described in claim 6, characterized in that, After the step of dipping the solder wire in flux, the method further includes: The water-based flux on the welding wire is heated at a second preset temperature for a second preset duration.

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