Air conditioner base plate and positioning method for moisture-proof agent coating of air conditioner base plate

Abstract

The invention provides an air conditioner base plate and a positioning method for moisture-proof agent coating of the air conditioner base plate. The substrate is used for supporting a plurality of electronic components and providing electrical connection, and one or more mark points are arranged on the surface, needing to be coated with a moisture-proof agent, of the substrate; the mark points comprise feature points which can be identified and positioned by detection equipment, and accurate positioning of the substrate is realized in the process of coating the moisture-proof agent on the surface of the substrate by identifying and positioning the feature points. The invention provides an effective way for setting a reference required by the positioning substrate for the component surface of the single-sided substrate; the accuracy and the precision of the coating position of the moisture-proof agent on the substrate can be ensured, the requirement on the assembly precision of a clamp for bearing the substrate is reduced, and the working efficiency is improved; insulation and moisture resistance of the substrate of the air conditioner can be improved, normal operation of the air conditioner in a humid environment is ensured, and the service life of the air conditioner and the substrate is prolonged.

Description

Technical Field

[0001] The invention relates to substrate-related technologies, and in particular to an air conditioner substrate and a positioning method for coating an anti-moisture agent thereon. Background Art

[0002] The substrate is an important basic material for printed circuit boards. It generally refers to a copper-clad laminate, which is a board made by impregnating the reinforcing material with a resin adhesive, covering one or both sides with copper foil and hot pressing. It is selectively etched, drilled, copper-plated and other processes to make the required conductive circuit pattern. It is a carrier that can provide support for electronic components and play an electrical connection role.

[0003] Some electronic devices may be in a humid environment for a long time. For example, air conditioners may be used in areas or scenes with high indoor humidity, or condensation may occur inside the air conditioner. If moisture and liquid invade the substrate in the device, it will cause problems such as electrical performance damage, short circuit or component corrosion, affecting the operation and service life of the device. For a type of substrate with wood pulp paper as a reinforcing material (called paper substrate), it has stronger hygroscopicity and is more likely to deform in a humid environment, which reduces the strength of the substrate, degrades its performance, and shortens its effective use cycle.

[0004] Applying a desiccant to the substrate surface to form a protective layer can improve the moisture-proof and insulation properties of the substrate itself, effectively isolating moisture and liquid intrusion. There are some areas on the substrate surface where coating is prohibited, such as areas where connectors and other components are arranged, which need to be avoided from being covered by desiccant and affecting electrical connection performance. Due to the limited space on the substrate, there is often only a 3mm buffer space between the coating area and the prohibited coating area, so precise positioning is required during the coating process.

[0005] Usually, the substrate is fixed on a fixture and sent to the anti-moisture agent coating equipment through a conveyor belt for coating. However, multiple support parts that are fixed to the tooling holes at the corners of the substrate with buckles are installed on the fixtures with fasteners such as screws. When using a universal fixture, it is necessary to adjust the position of the support parts on the fixture according to the size of different substrates, the different positions of the tooling holes, etc. The support parts are reassembled and disassembled for each adjustment, and the front and back heights cannot be kept consistent. In addition, in addition to the height deviation of the support parts, factors such as fixture wear and board rebound will cause deviations in the position of the substrate in the coating equipment, resulting in reduced accuracy in anti-moisture agent coating. Summary of the invention

[0006] The purpose of the present invention is to provide a positioning method for an air conditioner substrate and its anti-moisture agent coating, to set a new reference point for the substrate surface (such as the component surface of a single-sided substrate) for precise positioning of the substrate in an anti-moisture agent coating device, which can reduce the accuracy requirements for fixture assembly and effectively improve the accuracy and work efficiency during anti-moisture agent coating.

[0007] A technical solution of the present invention is to provide a substrate, which is used to support a number of electronic components and provide electrical connections;

[0008] The substrate is provided with one or more mark points on the surface where the moisture-proofing agent is to be applied;

[0009] The mark points include characteristic points that can be identified and located by a detection device; the detection device is used to identify and locate the characteristic points, and then locate the substrate during the process of the anti-moisture agent coating device coating the surface of the substrate with the anti-moisture agent.

[0010] Optionally, the mark point further includes an open area surrounding the feature point;

[0011] The characteristic points and the outline of the open area are formed on the surface to be coated with the anti-moisture agent by silk-screen printing.

[0012] Optionally, there is a contrast difference between the feature points of the mark point, the outline of the open area, and the substrate that is sufficient for the detection device to correctly identify the mark point.

[0013] Optionally, there is a color difference between the color of the feature point of the mark point, the color of the outline of the open area, and the color of the substrate, which is sufficient for the detection device to correctly identify the mark point.

[0014] Optionally, the substrate is a paper substrate.

[0015] Optionally, the color of the substrate is yellow;

[0016] The color of the feature points is white, and the color of the outline of the open area is white.

[0017] Optionally, the feature point of the mark point is a solid circular pattern.

[0018] Optionally, the diameter of the circular pattern is 1 mm.

[0019] Optionally, a square frame is formed 1.75 mm away from the center of the feature point as the outline of the open area, and the width of the frame is 0.5 mm.

[0020] Optionally, the substrate is a single-sided substrate, one side of which is a component surface without a copper foil layer, and the other side is a welding surface with a copper foil layer; the surface to be coated with the anti-moisture agent includes at least the component surface of the single-sided substrate, and the component surface is provided with one or more of the mark points.

[0021] Optionally, when the substrate is a single-sided substrate, one side is a component surface without a copper foil layer, and the other side is a welding surface with a copper foil layer; when the surface to be coated with the anti-moisture agent includes the component surface of a single-sided substrate, the component surface is provided with one or more first reference point graphics, and the first reference point graphics are mark points formed by silk screen printing.

[0022] Optionally, when the surface to be coated with the anti-moisture agent includes the welding surface of the single-sided substrate, the welding surface is provided with one or more first reference point graphics, and the first reference point graphics are mark points formed by silk screen printing; or, the welding surface is provided with one or more second reference point graphics, and the second reference point is a mark point formed by processing the copper foil layer.

[0023] Optionally, when the substrate is a double-sided substrate, both sides are welding surfaces for setting copper foil layers;

[0024] When the surface to be coated with the anti-moisture agent includes any welding surface of the double-sided substrate, the welding surface is provided with one or more first reference point graphics, and the first reference point graphics are mark points formed by silk screen printing; or, the welding surface is provided with one or more second reference point graphics, and the second reference point is a mark point formed by processing the copper foil layer.

[0025] Optionally, the substrate and the clamp supporting it are transported together to the anti-moisture agent coating device by a conveying device; the clamp is provided with a plurality of supporting members for fixing the substrate on the clamp.

[0026] Optionally, the clamp is a universal clamp whose support position can be adjusted according to the size of the substrate, or a special clamp whose support position is fixedly set to match the size of the substrate.

[0027] Optionally, the substrate is a substrate for an air conditioner.

[0028] Another technical solution of the present invention is to provide a positioning method for coating a substrate with an anti-humidity agent, which is used to position any of the above-mentioned substrates during the coating process of the anti-humidity agent;

[0029] For the substrate located in the anti-moisture agent coating device, a coordinate reference value of the center of a feature point of a mark point on the substrate is obtained by a detection device, and a template of the mark point is set;

[0030] An image acquisition device moving near the coordinate reference value photographs the surface of the substrate to be coated with the anti-moisture agent;

[0031] The detection device compares the captured image with the template to determine whether the image contains the mark point actually set on the substrate;

[0032] When the captured image contains a mark point actually set on the substrate, the detection device confirms the actual coordinate value of the center of the feature point of the mark point actually set on the substrate;

[0033] The detection device compensates according to the difference between the actual coordinate value and the reference coordinate value, adjusts the operating parameters of the nozzle of the anti-moisture agent coating device, and controls the nozzle to coat the anti-moisture agent on the surface of the substrate to be coated with the anti-moisture agent according to the adjusted operating parameters.

[0034] The substrate and the positioning method for coating the moisture-proofing agent of the present invention have at least the following beneficial effects:

[0035] The present invention forms a mark point on the surface of the substrate by silk-screen printing, and can provide a reference required for positioning the substrate for the anti-moisture agent coating process without additional steps, thereby expanding a new application scenario for the mark point.

[0036] The silk-screen mark points of the present invention provide an effective way to set the reference required for positioning the substrate, especially for the component surface without a copper foil layer on the single-sided substrate, thereby locating the position of the substrate during the anti-moisture agent coating process, and maximally ensuring the accuracy and precision of the coating position.

[0037] The welding surface of a single-sided substrate or a double-sided substrate can, as needed, use the existing copper marks on the welding surface, which were originally identified by the placement machine, to position the substrate during the anti-moisture agent coating process; or, add silk-screen marks on the welding surface to position the substrate during the anti-moisture agent coating process.

[0038] By identifying and locating the characteristic points of the mark points, it can be ensured that the substrate has correctly entered the working position in the coating equipment, and the situation that the nozzle of the coating equipment moves and hits the parts due to the substrate not being in place can be prevented; moreover, by reasonably setting the movement path of the nozzle, the nozzle can quickly and efficiently reach the coatable area on the surface of the substrate for coating, and it can also avoid applying the anti-moisture agent to the prohibited coating area.

[0039] For component surfaces with a small buffer space between the coating area and the prohibited coating area, the above-mentioned method of identifying and locating mark points and then locating the substrate of the present invention can meet the high-precision requirements when coating the anti-moisture agent on the component surface.

[0040] The present invention can reduce the accuracy requirements for the fixture that carries the substrate, and will not be overly dependent on the assembly accuracy of the fixture. For example, the influence of slight deviations when the support fixes the substrate, slight deviations of fasteners such as screws of the support, and slight wear of the fixture are minimized. There is no need to repeatedly adjust or calibrate the fixture and its support, nor is there any need to frequently adjust the program for calibrating the substrate position in the coating equipment, thereby improving work efficiency.

[0041] The surface of the substrate (including but not limited to the paper substrate) with the silk screen mark point is precisely coated with the anti-humidity agent to form a protective layer on the substrate surface that can block the intrusion of moisture and liquid, thereby improving the insulation and moisture-proof performance of the substrate and effectively preventing the substrate from being deformed or reduced in strength due to moisture. The substrate can be applied to the air conditioner, so that even if the internal or external environment of the air conditioner is relatively humid, the normal operation of the air conditioner can be ensured, thereby extending the service life of the air conditioner and the substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of the mark points arranged on the substrate according to the embodiment of the present invention.

[0043] Figure 2 It is a schematic diagram of example dimensions of mark points arranged on the substrate according to the embodiment of the present invention.

[0044] Figure 3 It is a schematic diagram of the structure of traditional mark points set on a substrate in the prior art.

[0045] Figure 4 It is a structural schematic diagram of the component surface of the substrate described in an embodiment of the present invention.

[0046] Figure 5 It is a schematic diagram of the structure of fixing the substrate to the clamp according to an embodiment of the present invention.

[0047] Figure 6 It is a schematic diagram of the enlarged structure of one of the supporting members of the substrate described in the embodiment of the present invention.

[0048] Figure 7 It is a schematic diagram of conveying the substrate and the clamp to the anti-moisture agent coating device according to an embodiment of the present invention.

[0049] Figure 8 It is a schematic flow chart of a method for positioning a substrate according to an embodiment of the present invention.

[0050] Fig. 9 It is a schematic diagram of a process of identifying mark points on a substrate in an embodiment of the present invention.

[0051] Fig.10 , Fig.11 is a schematic diagram of a system display interface when a mark point on a substrate is identified in an embodiment of the present invention. Fig.10 , Fig.11 The cases where the reference value of the mark point coordinates is the same as or different from the actual value are shown respectively. DETAILED DESCRIPTION

[0052] According to one classification method of substrates, a substrate with copper foil on both sides is a double-sided substrate, and a substrate with copper foil only on one side is a single-sided substrate.

[0053] Single-sided substrates use one side with a copper foil layer as the soldering surface; SMD configuration can be performed on the soldering surface (surface mount components are installed at set positions on the soldering surface and fixed by soldering). At the same time, the main body of most electronic components is located on the other side of the single-sided substrate without a copper foil layer (called the component side), and the pins of these components pass through the through holes to the soldering side and are fixed by soldering; there is no copper foil layer on the component side, so there is no SMD configuration. In contrast, double-sided substrates have copper foil layers on both surfaces, so both can be used as soldering surfaces for SMD configuration, and the main body and / or pins of electronic components can be arranged as needed.

[0054] Generally, multiple mark points, also called reference points, are set on the soldering surfaces with patch configuration (the two soldering surfaces of double-sided substrates and one soldering surface of single-sided substrates) (to distinguish from a new type of mark point described below, the reference point set on the soldering surface in the prior art is called a traditional mark point). The automatic placement machine can locate the substrate by identifying the traditional mark points to ensure the accuracy of the patch. According to the role of traditional mark points on the substrate, they can be divided into three types: single-board mark points are used to locate the positions of all circuit features on a single substrate; local mark points are used to assist in locating the position of a single component (for example, a device with many pins and small pin spacing); if it is a puzzle board, puzzle board mark points can also be set to assist in locating the positions of all circuit features on the puzzle board.

[0055] like Figure 3 As shown, the central feature point 61 of the traditional mark point 60 is a solid circular pattern; there is an open area at a certain distance outside (this example shows an area surrounded by a square outline 62), which cannot have any circuit features, characters or marks, etc.; the base material of the central feature point 61 is bare copper, so it needs to be processed and formed on the basis of the copper foil layer on the surface of the substrate. However, for the component surface of the single-sided substrate, there is no need for patch configuration on the component surface, and there is no need to position the component surface side for consideration of factors such as patch accuracy; and there is no copper foil layer on the component surface, so it is impossible to form a copper feature point in the center of the traditional mark point, and no unnecessary processes will be deliberately added to set this traditional mark point or other mark points for the component surface of the single-sided substrate.

[0056] The embodiments of the present invention are designed to enable the anti-wetting agent coating device to accurately position the substrate and improve the accuracy and precision of coating the anti-wetting agent on the substrate surface. Figure 1 As shown, a new mark point is set on the surface of the substrate, which is formed by silk screen printing. For example, the mark point can be formed when silk screen printing various characters and marks on the surface of the substrate, without adding additional processes.

[0057] like Figure 1 As shown, a mark point 10 of an embodiment of the present invention has a solid circular feature point 11; there is an open area outside the feature point 11, and there are no circuit features, characters or marks in the open area; the outline 12 of the open area in this example is a square, and the circular feature point 11 is at the center of the square. The feature point 11 is a reference for positioning the substrate 20; the setting of the open area can prevent irrelevant factors from interfering with the detection equipment's recognition of the feature point 11; the open area and its outline 12 can cooperate with the feature point 11 to make the entire mark point 10 more eye-catching on the substrate and easier to be recognized by the detection equipment.

[0058] Figure 2 In an example, the feature point is a circular pattern with a diameter of 1 mm; a square frame is set 1.75 mm away from the center of the circle, and the width of the frame is 0.5 mm; the area surrounding the feature point in the frame constitutes the open area.

[0059] The color of the mark point described in the embodiment of the present invention needs to have a strong enough contrast with the color of the substrate itself, so that the color difference between the mark point and the substrate is obvious enough, so as to facilitate the detection equipment to accurately identify it. The open area is composed of the substrate surface, and thus has the same color as the substrate itself; the color of the outline of the open area is the same as the color of the mark point. When there are multiple mark points on the substrate surface, their colors are the same.

[0060] Figure 4 The example substrate is a paper substrate, FR-1 type material, with wood pulp paper as a reinforcing material, phenolic resin as a binder, and is made by high temperature hot pressing (the substrate product used in this example is Changxing ETL-SPC-204 (T) model). In this example, the color of the substrate 20 itself is yellow, so in order to make the color difference between the mark point 10 and the substrate obvious enough, the color of the outline of the mark point and the open area is set to white to improve the contrast.

[0061] In a preferred embodiment, the silk-screen mark points are set on the component surface of the single-sided substrate. Figure 4The figure shows the component side of a single-sided substrate. No copper foil layer is provided on this surface, and copper characteristic points of traditional mark points cannot be set. The main bodies of numerous electronic components are located on this component side (the devices and their arrangements currently shown are only examples). The pins of these components pass through through holes to reach the back side of the substrate not shown in the figure. The back side is a welding surface provided with a copper foil layer, and the pins of the electronic components can be fixed by welding on the welding surface. It is also possible to configure patches on the welding surface and form traditional mark points required for patch positioning.

[0062] In an embodiment of the present invention, one or more silk-screen mark points are provided on at least the component surface of a single-sided substrate for positioning the substrate during the coating process of the anti-moisture agent. By accurately identifying and positioning the mark points, it can be ensured that the substrate has correctly entered the working position in the coating equipment, thereby preventing the nozzle of the coating equipment from colliding with the component when moving due to the substrate not being in place. It can also maximize the accuracy and precision of the coating and avoid coating the anti-moisture agent in the prohibited coating area.

[0063] In some embodiments, if the welding surface (the back side not shown) of a single-sided substrate is to be coated with a desiccant, then in some examples, the detection device of the coating device can directly identify the traditional copper mark points on the welding surface to position the substrate; or, in other examples, one or more silk-screen mark points can be set on the welding surface of the single-sided substrate to position the substrate during the desiccant coating process. That is, whether the welding surface of the single-sided substrate needs to set the silk-screen mark points for desiccant coating is optional. Similarly, the welding surfaces on both sides of the double-sided substrate can also directly identify the traditional copper mark points, or set and identify the silk-screen mark points in addition, in order to position the substrate when the desiccant is coated.

[0064] In this example, if Figure 4 As shown, a pair of silk-screened mark points 10 are arranged asymmetrically in a diagonal form on the component surface of the single-sided substrate; one of the mark points 10 is located at a corner, and the other mark point 10 is located in the middle of the long side of the opposite side, close to the edge of the substrate 20. The above-mentioned specific positions and diagonal distribution forms are only examples, and the silk-screened mark points can be set at any corner of the component surface and / or near any side edge; in theory, the silk-screened mark points can be set at any position in the middle of the component surface where there are no electronic components and meet the requirements of an open area.

[0065] The position of the silk screen mark point can be selected, for example, according to the range of the coating area, taking into account the arrangement of electronic components on the surface of the component, but it is not limited to this, as long as it can meet the requirements of the detection equipment for correct identification. As an example, the rectangular range formed by the diagonal line connecting the two silk screen mark points can cover as much coating area as possible on the surface of the component. The closest distance between the outline of the empty area of ​​the silk screen mark point and the edge, corner, etc. of the substrate cannot affect the operations of picking up, placing or fixing the substrate.

[0066] Larger silk-screen mark points make it easier for the detection equipment to identify them more quickly; three or more silk-screen mark points can make positioning more accurate, but these designs limit the available range of electronic components on the component surface to a certain extent. Setting a silk-screen mark point occupies a smaller area on the substrate surface, and can also simplify the complexity of data processing when the detection equipment identifies and locates, and improve recognition efficiency. Therefore, the appropriate layout form can be selected according to the actual situation.

[0067] It should be noted that the shape, size, color, quantity, distribution position, etc. of the mark point only need to meet the requirement that the detection equipment can clearly identify it. Therefore, the content described above is only a preferred example and is not a specific limitation on the setting of the mark point.

[0068] like Figure 5 to Figure 7 structure, and with Figure 8 As shown in the flow chart, in order to apply the anti-moisture agent, an embodiment of the present invention fixes the substrate 20 on the clamp 30, and sends the substrate 20 and the clamp 30 into the anti-moisture agent coating equipment 50 through a conveying device to perform mark point recognition and positioning of the substrate 20, and then apply the anti-moisture agent to the coatable area on the surface of the substrate 20.

[0069] The fixture 30 is provided with a plurality of support members 40, each of which is mounted on the frame structure of the fixture 30 by means of fasteners such as screws; when the fixture 30 is a universal fixture, the size of the fixture can be adjusted as needed, for example, the position of the support member 40 on the frame structure can be adjusted, so that substrates of different sizes can be loaded. Each support member 40 is provided with a buckle, which can be inserted into the tooling hole at the corner of the substrate 20, thereby fixing the substrate 20 on the fixture 30. The fixture 30 placed on both sides on the guide rail can move along the guide rail under the action of the conveyor belt (not shown) below it, and carry the substrate 20 fixed on the fixture 30 into the coating device 50. It can be understood that, for example, the fixture 30, the support member 40 and its components for fixing the substrate 20, the structure of the conveying device, etc., are only illustrated as examples. In other examples, it is also possible not to use a universal fixture with adjustable support member positions, but to configure a corresponding special fixture for each substrate for loading.

[0070] After the substrate enters the coating equipment with the fixture, the image acquisition device (such as a camera) captures the mark point within its field of view, and the detection equipment identifies and locates the mark point, thereby realizing the positioning of the substrate; wherein, the movement trajectory of the nozzle is set based on the center coordinates of the circular feature point of the mark point, so that the nozzle can reach the coatable area of ​​the component surface without omission for coating operation, and will not collide with various components on the substrate when moving.

[0071] like Fig. 9 As shown, when the detection device identifies and locates the mark point, it will first confirm the reference value of the center coordinate of the feature point of the mark point (hereinafter referred to as the coordinate reference value). The coordinate reference value will be imported into the detection device together with other parameters related to the mark point (such as shape, size, color, quantity, distribution position, etc.) to form a template about the mark point.

[0072] The detection device, for example, drives the image acquisition device to start detection from the position corresponding to the coordinate reference value, so as to capture the actual position of the mark point on the substrate more quickly. The captured image within the real-time field of view of the image acquisition device will be synchronously displayed on the system display interface, and a corresponding template mark will be formed according to the template of the mark point and superimposed on the captured image for display. The captured image will change with the movement of the image acquisition device; when the image acquisition device gradually approaches the actual position of the mark point on the substrate, the mark point in the field of view will appear on the system display interface as gradually approaching and entering the range defined by the template mark.

[0073] The coordinate position of the center point of the template mark will change with the movement of the image acquisition device, and the current coordinate position will be displayed in real time on the system display interface; until the center point of the template mark coincides with the center point of the feature point of the actual mark point on the substrate, at which time the coordinate position of the center point of the template mark is the actual value of the center coordinate of the feature point of the mark point (hereinafter referred to as the actual coordinate value). The detection system will convert the coordinate reference value of the center of the feature point, the actual value of the coordinate, the coordinate position of the center point of the template mark, the coordinate of the image acquisition device when it moves, the coordinate of the captured image, etc. to the same coordinate system for corresponding data processing.

[0074] The detection device compares the actual coordinate value of the center of the feature point with the coordinate reference value, and compensates according to the difference between the two, thereby accurately positioning the substrate during the anti-moisture agent coating process. For example, the detection device fine-tunes the operating parameters of the nozzle coating according to the difference between the actual coordinate value and the coordinate reference value to ensure its accuracy during coating and movement. The operating parameters, such as the nozzle's moving starting position, end position, moving path, coating start time, end time, etc., can be fine-tuned for one or more of them, but the above is used as an example and is not a limitation on the operating parameters.

[0075] by Fig.10 , Fig.11 For example, in an example system display interface, the coordinate reference value recorded by the detection device will be displayed, corresponding to the xyz axis coordinates of the template 1 position represented by the frame line 71 in the figure, taking (281.584, 94.1875, 16) as an example. The system display interface will also display the template image of the mark point recorded by the detection device (the figure is a picture of template 1).

[0076] The template mark 73 is displayed in a circle and a box with eye-catching colors, corresponding to the feature points of the mark point and the outer boundary of the open area, and is enlarged and superimposed on the currently displayed captured image to facilitate observation by the operator. The center point coordinates of the template mark 73, that is, the xyz axis coordinates of the current position represented by the frame line 72 in the figure, will change in real time with the movement of the image acquisition device.

[0077] Fig.10 In the figure, the actual mark point 74 on the substrate has entered the shooting field of view, but has not yet completely entered the delimited range of the template mark 73 (the circle range of the template mark 73 in this example is only an example and not a limitation on the delimited range). The center point of the template mark 73 does not coincide with the center point of the feature point of the actual mark point 74 on the substrate. The coordinates of the center point of the template mark 73 currently shown are (281.584, 94.188, 15).

[0078] Fig.11In the figure, as the image acquisition device continues to move, until the mark point 74 actually set on the substrate completely enters the demarcated range of the template mark 73 (the circle range of the template mark 73), the center point of the displayed template mark 73 completely coincides with the center point of the characteristic point of the mark point 74 actually set on the substrate. The coordinates of the center point of the template mark 73 currently shown are (280.956, 94.83, 15), which correspond to the center coordinates of the characteristic point of the actual mark point 74 on the substrate (i.e., the actual coordinate value). At the same time, the coordinates of the position of the template 1 shown in the frame line 71 (i.e., the coordinate reference value) are (281.584, 94.1875, 16), which are different from the current actual coordinate values ​​(280.956, 94.83, 15).

[0079] Therefore, the detection equipment compensates for the difference between the actual coordinate value of the center of the feature point and the coordinate reference value, adjusts the operating parameters of the nozzle and other devices, and controls the movement of the nozzle above the substrate surface according to the adjusted operating parameters to perform the anti-moisture agent coating operation.

[0080] In the above positioning method for coating the anti-humidifying agent, the preferred substrate is a single-sided substrate, and the anti-humidifying agent needs to be coated on the component surface with the silk-screen mark point, and at least some electronic components may have been installed on the component surface; when the single-sided substrate is fixed on the fixture, the component surface is facing upward, so that the component surface can be opposite to the image acquisition device in the coating equipment and the nozzle for coating the anti-humidifying agent (if the direction of the image acquisition device or the nozzle is changed, the direction of the component surface on the fixture can be adjusted according to the actual situation). Then, the detection equipment will read the template data and coordinate information related to the silk-screen mark point on the component surface of the current single-sided substrate to identify and locate the silk-screen mark point.

[0081] It can be understood that if the anti-moisture agent needs to be coated on the welding surface of the other side of the single-sided substrate, or the welding surface of one side of the double-sided substrate, the substrate can be fixed to the fixture and the orientation of the surface to be coated can be determined in a similar manner as described above, so that the surface to be coated is opposite to the image acquisition device and the nozzle; and the mark point on the surface to be coated can also be identified and located by a similar positioning method as described above. In some examples, the welding surface of the single-sided substrate or the welding surface of the double-sided substrate has been set with a traditional copper mark point for patch configuration. The detection equipment can read the template data and coordinate information related to the traditional mark point on the current welding surface (of the single-sided substrate or the double-sided substrate), and identify and locate the traditional mark point, and the image acquisition device also captures the traditional mark point.

[0082] Or, in other examples, for the purpose of positioning the substrate when applying the anti-moisture agent, the silk screen mark points described in the embodiments of the present invention are formed specifically on the welding surface of the single-sided substrate or the welding surface of the double-sided substrate. The detection device will read the template data and coordinate information related to the silk screen mark points on the current welding surface (of the single-sided substrate or the double-sided substrate), and identify and locate the corresponding silk screen mark points. The image acquisition device also captures the corresponding silk screen mark points. The method of identifying and locating silk screen mark points or traditional mark points on the welding surface is similar to the method of identifying and locating silk screen mark points on the component surface, and will not be described in detail.

[0083] The embodiment of the present invention does not require additional processes. Mark points are formed on the surface of the substrate by silk screen printing, and the silk screen mark points are identified and located by the above method, so that the substrate can be accurately positioned during the anti-moisture agent coating process, thereby accurately coating the anti-moisture agent on the coatable area of ​​the substrate surface. The substrate treated as above (with a protective layer of anti-moisture agent formed on the surface with silk screen mark points) can be installed in the air conditioner, so that even if the internal or external environment of the air conditioner is relatively humid, moisture and liquid can be isolated from invading the substrate, thereby maintaining the performance of the substrate, ensuring the normal operation of the air conditioner, and extending the service life of the air conditioner and the substrate.

[0084] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A substrate, which is used to support a number of electronic components and provide electrical connections, characterized in that: The substrate is provided with one or more mark points on the surface where the moisture-proofing agent is to be applied; The mark points include characteristic points that can be identified and located by a detection device; the detection device is used to identify and locate the characteristic points, and then locate the substrate during the process of the anti-moisture agent coating device coating the surface of the substrate with the anti-moisture agent.

2. The substrate according to claim 1, wherein The mark point also includes an open area surrounding the feature point; The characteristic points and the outline of the empty area are formed on the surface to be coated with the anti-moisture agent by silk screen printing; the characteristic points of the mark point and the outline of the empty area have a contrast difference with the substrate sufficient to allow the detection device to correctly identify the mark point.

3. The substrate according to claim 2, characterized in that There is a color difference between the color of the feature point of the mark point, the color of the outline of the empty area, and the color of the substrate that is sufficient to allow the detection device to correctly identify the mark point.

4. The substrate according to claim 3, characterized in that The substrate is a paper substrate; The color of the substrate is yellow; The color of the feature points is white, and the color of the outline of the open area is white.

5. The substrate according to claim 2, characterized in that The characteristic point of the mark point is a solid circular pattern with a diameter of 1 mm; A square frame is formed 1.75 mm away from the center of the feature point as the outline of the open area, and the width of the frame is 0.5 mm.

6. The substrate according to any one of claims 1 to 5, characterized in that The substrate is a single-sided substrate, one side of which is a component surface without a copper foil layer, and the other side is a welding surface with a copper foil layer; the surface to be coated with the anti-moisture agent at least includes the component surface of the single-sided substrate, and the component surface is provided with one or more mark points.

7. The substrate according to claim 1, wherein When the substrate is a single-sided substrate, one side is a component side without a copper foil layer, and the other side is a soldering side with a copper foil layer; When the surface to be coated with the anti-moisture agent includes a component surface of a single-sided substrate, the component surface is provided with one or more first reference point patterns, and the first reference point patterns are mark points formed by silk-screen printing; When the surface to be coated with the moisture-proof agent includes the welding surface of the single-sided substrate, the welding surface is provided with one or more first reference point patterns, and the first reference point patterns are mark points formed by silk screen printing; or the welding surface is provided with one or more second reference point patterns, and the second reference points are mark points formed by processing the copper foil layer; Alternatively, when the substrate is a double-sided substrate, both sides are soldering surfaces where copper foil layers are provided; When the surface to be coated with the anti-moisture agent includes any welding surface of the double-sided substrate, the welding surface is provided with one or more first reference point graphics, and the first reference point graphics are mark points formed by silk screen printing; or, the welding surface is provided with one or more second reference point graphics, and the second reference point is a mark point formed by processing the copper foil layer.

8. The substrate according to claim 1, wherein The substrate and the fixture supporting the substrate are transported together to the anti-moisture agent coating device by a conveying device; The clamp is provided with a plurality of supporting members for fixing the substrate on the clamp; The clamp is a universal clamp whose support position can be adjusted according to the size of the substrate, or a special clamp whose support position is fixedly set to match the size of the substrate.

9. The substrate according to claim 1, wherein The substrate is a substrate for an air conditioner.

10. A method for positioning a substrate anti-moisture agent coating, characterized in that: The positioning method is used to position the substrate according to any one of claims 1 to 9 during the anti-moisture agent coating process; for the substrate located in the anti-moisture agent coating device, the coordinate reference value of the center of the feature point of the mark point on the substrate is obtained by the detection device, and the template of the mark point is set; An image acquisition device moving near the coordinate reference value photographs the surface of the substrate to be coated with the anti-moisture agent; The detection device compares the captured image with the template to determine whether the image contains the mark point actually set on the substrate; When the captured image contains a mark point actually set on the substrate, the detection device confirms the actual coordinate value of the center of the feature point of the mark point actually set on the substrate; The detection device compensates according to the difference between the actual coordinate value and the reference coordinate value, adjusts the operating parameters of the nozzle of the anti-moisture agent coating device, and controls the nozzle to coat the anti-moisture agent on the surface of the substrate to be coated with the anti-moisture agent according to the adjusted operating parameters.

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