A preheating device

Abstract

This utility model belongs to the technical field of preheating devices, specifically relating to a preheating device comprising a housing, a conveying mechanism, and a fan assembly. An upper air knife assembly is located at the bottom of the upper chamber within the housing, communicating with the inner cavity of the upper chamber and used to deliver hot air to the top of the substrate component. A lower air knife assembly is located at the top of the lower chamber within the housing, communicating with a first cavity and used to deliver hot air to the bottom of the substrate component. A return flow hole communicating with a second cavity is located on a side of the lower chamber parallel to the conveying direction of the substrate component. This device allows air to return to the second cavity via the side of the lower chamber and then be recycled by the fan assembly. The return flow process is relatively short, which helps to shorten the return flow time, improve the heat recovery rate, and reduce costs.

Description

Technical Field

[0001] This utility model belongs to the technical field of preheating devices, and specifically relates to a preheating device. Background Technology

[0002] After etching, substrate components such as PCB circuit boards, packaging substrates, and glass-based semiconductor substrates need to undergo spray cleaning to remove residual etching solution from the circuit board surface. After spray rinsing, in order to remove residual cleaning water from the circuit board surface in a timely manner, the circuit board also needs to be dried by a preheating device.

[0003] Existing preheating devices use hot air to preheat and dry substrate components, and typically recirculate the hot air to recover heat for reuse. However, the recirculation structure of the preheating device is relatively complex, and the recirculation process is relatively long, which affects the heat recovery rate and results in relatively high production and operating costs. Utility Model Content

[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a preheating device in which heat is returned to the second chamber through the side of the lower box and then recycled by the fan assembly. The return process is relatively short, which helps to shorten the return time, improve the heat recovery rate, and reduce costs.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A preheating device, comprising:

[0007] The housing has an opening and a second opening communicating with the outside. Inside the housing are an upper box and a lower box spaced apart in a vertical direction. The lower box has a first cavity and a second cavity separated by a partition.

[0008] A conveying mechanism is provided between the upper housing and the lower housing. The conveying mechanism includes a driving component and an upper conveying roller group and a lower conveying roller group arranged at intervals in the vertical direction. A space for placing a substrate component is formed between the upper conveying roller group and the lower conveying roller group. The driving component is used to drive the upper conveying roller group and the lower conveying roller group to convey the substrate component.

[0009] A fan assembly is disposed within the housing. The fan assembly has a first air inlet, a second air inlet, a first air outlet, and a second air outlet. The first air inlet is connected to the opening, the second air inlet is connected to the second cavity, the first air outlet is connected to the inner cavity of the upper housing, and the second air outlet is connected to the first cavity.

[0010] The upper housing has an upper air knife assembly at its bottom, which is connected to the inner cavity of the upper housing and is used to deliver hot air to the top of the substrate component. The lower housing has a lower air knife assembly at its top, which is connected to the first cavity and is used to deliver hot air to the bottom of the substrate component. The lower housing has a return hole on its side parallel to the conveying direction of the substrate component, which is connected to the second cavity.

[0011] In some implementations of this utility model, in conjunction with the above implementations, both the upper conveying roller group and the lower conveying roller group include a plurality of conveying rollers spaced apart along the conveying direction of the substrate component. The first gap formed between two adjacent upper conveying rollers and the second gap formed between two adjacent lower conveying rollers correspond to each other in the vertical direction. The upper air knife assembly includes a plurality of upper air knives spaced apart along the conveying direction of the substrate component, and the upper air knives are corresponding to the first gap in the vertical direction. The lower air knife assembly includes a plurality of lower air knives spaced apart along the conveying direction of the substrate component, and the lower air knives are corresponding to the second gap in the vertical direction.

[0012] In some implementations of this utility model, in conjunction with the above implementation methods, the lower housing is provided with the second cavity at both ends of the lower air knife, the second cavity extends along the conveying direction of the substrate component, and the lower housing is provided with a plurality of return holes at intervals along the length direction of the second cavity.

[0013] In some implementations of this utility model, in conjunction with the above-described implementations, the lower housing further includes a third cavity, with the first and second cavities spaced apart from the third cavity, each of the second cavities connected to the third cavity via a return pipe, and the second air inlet connected to each of the second cavities via the third cavity.

[0014] In some implementations of this utility model, in conjunction with the above-described implementations, the lower housing includes a first lower housing, a second lower housing, and a third lower housing. The first lower housing and the third lower housing are arranged side by side along the conveying direction of the substrate component. The first lower housing has a first cavity formed inside it, the third lower housing has a third cavity formed inside it, and the second lower housing has a second cavity formed inside it. The second lower housing is mounted on both sides of the first lower housing that are parallel to the conveying direction of the substrate component. The top plate of the second lower housing is provided with the return hole.

[0015] In some implementations of this utility model, in conjunction with the above implementations, the conveying mechanism further includes two mounting brackets spaced apart along the conveying direction perpendicular to the substrate component. The mounting brackets are correspondingly installed on the outside of the second lower housing. The conveying roller is installed between the two mounting brackets. When the upper air knife and the lower air knife are projected onto the top surface of the first lower housing, both ends of the upper air knife and the lower air knife do not extend beyond the top surface of the first lower housing.

[0016] In some implementations of this utility model, in conjunction with the above-described implementations, the mounting bracket is provided with a plurality of temperature sensors, which are used to detect the air temperature between two mounting brackets.

[0017] In some implementations of this utility model, in conjunction with the above implementations, the fan assembly includes a fan and a heater. The fan is provided with a third air outlet, a first air inlet and a second air inlet. The heater is provided with a third air inlet, a first air outlet and a second air outlet. The third air outlet and the third air inlet are connected. The first cavity of the lower housing and the inner cavity of the upper housing are both provided with air filters.

[0018] In some implementations of this utility model, in conjunction with the above-described implementations, one side of the upper housing is hinged to the housing via a first hinge axis arranged parallel to the conveying direction of the substrate component, and the other side of the upper housing is hinged to the housing via a drive cylinder. The drive cylinder is used to drive the upper housing to rotate around the first hinge axis so that the upper housing moves closer to or further away from the lower housing.

[0019] In some implementations of this utility model, in conjunction with the above implementations, the housing is provided with an inlet and an outlet at intervals along the conveying direction of the substrate component, and the conveying mechanism is installed between the inlet and the outlet so that the substrate component enters between the upper conveying roller group and the lower conveying roller group through the inlet and is then conveyed to the outlet. Both the inlet and the outlet are provided with detection sensors.

[0020] One of the above technical solutions has at least one of the following advantages or beneficial effects: The preheating device of this technical solution draws in external air through a fan assembly. After the air is heated, it dries the substrate component through the upper and lower air knife assemblies, and then flows back to the second chamber through the side of the lower chamber, and is finally recycled by the fan assembly. Its recirculation process is relatively short. After the hot air reaches the surface of the substrate component, it can flow along the gap between the upper and lower air knife assemblies to the side of the lower chamber, which helps to shorten the recirculation time, improve the heat recovery rate, reduce operating costs, and the overall structure of the device is relatively simple, thus reducing production costs. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the external structure of one embodiment of the present invention;

[0023] Figure 2 yes Figure 1 The diagram shown is a structural schematic of an embodiment with the shell portion of the structure hidden.

[0024] Figure 3 yes Figure 1 The diagram shown is a top view of an embodiment where the housing and upper casing are hidden.

[0025] Figure 4 yes Figure 1 The diagram shows a structural schematic of the lower housing, lower air knife assembly, and fan in one embodiment.

[0026] Explanation of icon numbers:

[0027] Housing 1; Opening 11; Upper housing 12; Lower housing 13; Return hole 131; First lower housing 132; Second lower housing 133; Third lower housing 134; Fan assembly 2; First air inlet 21; First air outlet 23; Air inlet 24; Second air inlet 25; Fan 261; Heater 262; Conveyor roller 4; Mounting bracket 5; Temperature sensor 6; Lower air knife 7; First hinge shaft 81; Drive cylinder 82; Inlet 83; Detection sensor 84; Connecting port 9. Detailed Implementation

[0028] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0029] In this utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this utility model, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0030] In this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this utility model, if "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0031] In this utility model, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model based on the specific content of the technical solution.

[0032] See Figure 1 , Figure 2 and Figure 4 An embodiment of this utility model provides a preheating device, including a housing 1, a conveying mechanism, and a fan assembly 2. The housing 1 has an opening 11 communicating with the outside. The housing 1 has an upper box 12 and a lower box 13 arranged at intervals in the vertical direction. The lower box 13 has a first cavity and a second cavity that are separated from each other.

[0033] The conveying mechanism is located between the upper housing 12 and the lower housing 13. The conveying mechanism includes a driving component and an upper conveying roller group and a lower conveying roller group arranged at intervals in the vertical direction. A space for placing the substrate component is formed between the upper conveying roller group and the lower conveying roller group. The driving component is used to drive the upper conveying roller group and the lower conveying roller group to convey the substrate component.

[0034] It is understood that the drive assembly can use a motor, cylinder, or other drive components to drive a transmission structure such as gears or pulleys to rotate, and then drive the upper and lower conveyor roller groups to rotate through the gears or pulleys. The substrate components include packaging substrates, semiconductor carriers, PCB boards, etc., and are not limited here.

[0035] The fan assembly 2 is housed within the casing 1. The fan assembly 2 has a first air inlet 21, a second air inlet 25, a first air outlet 23, and a second air outlet. The first air inlet 21 communicates with the opening 11, and the second air inlet 25 communicates with the second cavity. The first air outlet 23 communicates with the inner cavity of the upper casing 12, and the second air outlet communicates with the air inlet 24 of the first cavity. (See also...) Figure 2 and Figure 4After the fan assembly 2 draws in outside air through the opening 11, it heats the air and then blows the hot air into the inner cavity of the upper housing 12 and the first cavity of the lower housing 13 respectively.

[0036] The upper housing 12 has an upper air knife assembly at its bottom, which is connected to the inner cavity of the upper housing 12 and is used to deliver hot air to the top of the substrate component. The lower housing 13 has a lower air knife assembly at its top, which is connected to the first cavity and is used to deliver hot air to the bottom of the substrate component, thereby preheating the top and bottom of the substrate component and making the substrate component dry.

[0037] The lower housing 13 has a reflux hole 131 on the side parallel to the conveying direction of the substrate component, which communicates with the second cavity. After the hot air output by the upper air knife assembly and the lower air knife assembly dries the substrate component, it flows into the second cavity through the reflux hole 131 on the side of the lower housing 13, and finally enters the fan assembly 2 through the second air inlet 25 that communicates with the second cavity, so as to realize the recycling of hot air.

[0038] The preheating device in this technical solution draws in external air through the fan assembly 2. After the air is heated, it passes through the upper and lower air knife assemblies to dry the substrate component, and then flows back to the second chamber through the side of the lower chamber 13, and is finally recycled by the fan assembly 2. The recirculation process is relatively short. After the hot air reaches the surface of the substrate component, it can flow along the gap between the upper and lower air knife assemblies to the side of the lower chamber 13, which helps to shorten the recirculation time, improve the heat recovery rate, reduce the operating cost, and the overall structure of the device is relatively simple, thus reducing the production cost.

[0039] Further, see Figure 2 and Figure 3 Both the upper and lower conveyor roller groups include multiple conveyor rollers 4 spaced apart along the conveying direction of the substrate component. The first gap formed between two adjacent upper conveyor rollers 4 and the second gap formed between two adjacent lower conveyor rollers 4 correspond to each other in the vertical direction.

[0040] The upper air knife assembly includes multiple upper air knives spaced apart along the substrate component conveying direction. The upper air knives and the first gap are correspondingly arranged vertically. The lower air knife assembly includes multiple lower air knives 7 spaced apart along the substrate component conveying direction. The lower air knives 7 and the second gap are correspondingly arranged vertically. In other words, the upper air knives and lower air knives 7 are arranged in parallel, and the upper air knives, lower air knives 7, the first gap, and the second gap correspond vertically. This ensures that the upper air knives can blow hot air onto the top surface of the substrate component through the first gap, and the lower air knives 7 can blow hot air onto the bottom surface of the substrate component through the second gap. Direct hot air blowing for preheating results in better drying effect.

[0041] It is understood that the reflux hole 131 can be located on one side of the upper housing 12 or on both sides of the upper housing 12, and there is no limitation thereto. In some embodiments, see Figure 3 and Figure 4 The lower housing 13 has a second cavity at both ends of the lower air knife 7. The second cavity extends along the conveying direction of the substrate component. The lower housing 13 has a plurality of return holes 131 spaced along the length of the second cavity to ensure that the hot air flowing out between the upper air knife and the lower air knife 7 can quickly flow into the second cavity through the return holes 131, reducing the return stroke and improving the heat recovery rate.

[0042] Further, see Figure 4 The lower housing 13 also has a third cavity. The first and second cavities are spaced apart from the third cavity, and each second cavity is connected to the third cavity through a return pipe. The second air inlet 25 is connected to each second cavity through the third cavity. By circulating the hot air from each second cavity to the third cavity and then into the second air inlet 25, it is easy to uniformly return the air to the fan assembly 2, thus meeting the connection requirements of the air inlet of the fan assembly 2.

[0043] Furthermore, see Figure 2 and Figure 4 The lower housing 13 includes a first lower housing 132, a second lower housing 133, and a third lower housing 134. The first lower housing 132 and the third lower housing 134 are arranged side by side along the conveying direction of the substrate component. A first cavity is formed inside the first lower housing 132, and a third cavity is formed inside the third lower housing 134. A second cavity is formed inside the second lower housing 133. The second lower housing 133 is installed on both sides of the first lower housing 132 parallel to the conveying direction of the substrate component. The top plate of each second lower housing 133 is provided with a return hole 131. The lower housing 13 is formed by assembling the various housings, which facilitates production and installation and reduces costs.

[0044] Furthermore, see Figure 2 and Figure 3 The conveying mechanism also includes two mounting brackets 5 spaced apart along the conveying direction perpendicular to the substrate component. The mounting brackets 5 are correspondingly installed on the outer side of the second lower housing 133. The conveying roller 4 is installed between the two mounting brackets 5. When the upper air knife and the lower air knife 7 are projected onto the top surface of the first lower housing 132, both ends of the upper air knife and the lower air knife 7 do not extend beyond the top surface of the first lower housing 132, thus avoiding occupying the position of the return hole 131 at the top of the second lower housing 133. This ensures that the hot air flowing out between the upper air knife and the lower air knife 7 can return to the second lower housing 133 through the return hole 131 at the top of the second lower housing 133, thereby improving the return efficiency and heat recovery rate.

[0045] Furthermore, see Figure 2 and Figure 3The mounting bracket 5 is equipped with several temperature sensors 6. The temperature sensors 6 are used to detect the air temperature between the two mounting brackets 5, so as to facilitate real-time monitoring of the temperature of the hot air flowing to the substrate components, ensure that the preheating process can meet the preset temperature requirements, and ensure the safety and operability of the drying process.

[0046] In some embodiments, see Figures 2 to 4 The fan assembly 2 includes a fan 261 and a heater 262. The fan 261 has a third air outlet, a first air inlet 21, and a second air inlet 25. The heater 262 has a third air inlet, a first air outlet 23, and a second air outlet. The third air outlet and the third air inlet are connected. The fan 261 draws in outside air and then delivers it to the heater 262 through the third air outlet for heating to achieve the preset temperature requirement. It is understood that the fan 261 may include a blower 261, a ventilator 261, or a supply fan 261, etc., and no limitation is made here.

[0047] Both the first cavity of the lower housing 13 and the inner cavity of the upper housing 12 are equipped with air filters to filter the hot air flowing into the first cavity of the lower housing 13 and the inner cavity of the upper housing 12, reducing dust and other contaminants on the substrate components and ensuring that the drying process is not affected. The air filters can be dust collection drawers or filter chips, etc., and there are no restrictions on their use.

[0048] In some embodiments, see Figure 2 One side of the upper housing 12 is hinged to the housing 1 via a first hinge shaft 81 arranged parallel to the conveying direction of the substrate component, and the other side of the upper housing 12 is hinged to the housing 1 via a drive cylinder 82. The drive cylinder 82 is used to drive the upper housing 12 to rotate around the first hinge shaft 81, so that the upper housing 12 moves closer to or away from the lower housing 13. It is understood that the drive cylinder 82 can be a hydraulic cylinder or a pneumatic cylinder, etc., and there is no limitation here.

[0049] When the substrate component needs to be dried, the drive cylinder 82 drives the upper housing 12 to rotate around the first hinge axis 81 and move closer to the lower housing 13, so that the upper air knife and the lower air knife 7 are parallel. The hot air blown out by the upper air knife and the lower air knife 7 can then preheat and dry the substrate component. When the drying work is completed, the drive cylinder 82 can drive the upper housing 12 to rotate around the first hinge axis 81 and move away from the lower housing 13, so that the conveying mechanism can be inspected or maintained.

[0050] Further, see Figure 1The housing 1 has an inlet 83 and an outlet spaced apart along the conveying direction of the substrate components. A conveying mechanism is installed between the inlet 83 and the outlet to allow the substrate components to enter between the upper and lower conveying roller groups through the inlet 83 and then be conveyed to the outlet. Both the inlet 83 and the outlet are equipped with detection sensors 84 to monitor in real time whether a substrate component is entering at the inlet 83 and whether a substrate component is exiting at the outlet, ensuring the smooth and orderly progress of the drying process. It is understood that the detection sensors 84 include photoelectric sensors, infrared sensors, etc., and are not limited here.

[0051] In some embodiments, the top of the housing 1 is further provided with a communication port 9, which is connected to the outside. To ensure that the air pressure inside and outside the housing 1 reaches a balanced or preset state, some of the hot air inside the housing 1 rises and is left to the outside through the communication port 9, thus meeting the working requirements when drying the substrate components.

[0052] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0053] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A preheating device, characterized in that, include: The housing has an opening communicating with the outside, and the housing has an upper box and a lower box spaced apart in the vertical direction. The lower box has a first cavity and a second cavity separated by a partition. A conveying mechanism is provided between the upper housing and the lower housing. The conveying mechanism includes a driving component and an upper conveying roller group and a lower conveying roller group arranged at intervals in the vertical direction. A space for placing a substrate component is formed between the upper conveying roller group and the lower conveying roller group. The driving component is used to drive the upper conveying roller group and the lower conveying roller group to convey the substrate component. A fan assembly is disposed within the housing. The fan assembly has a first air inlet, a second air inlet, a first air outlet, and a second air outlet. The first air inlet is connected to the opening, the second air inlet is connected to the second cavity, the first air outlet is connected to the inner cavity of the upper housing, and the second air outlet is connected to the first cavity. The upper housing has an upper air knife assembly at its bottom, which is connected to the inner cavity of the upper housing and is used to deliver hot air to the top of the substrate component. The lower housing has a lower air knife assembly at its top, which is connected to the first cavity and is used to deliver hot air to the bottom of the substrate component. The lower housing has a return hole on its side parallel to the conveying direction of the substrate component, which is connected to the second cavity.

2. The preheating device according to claim 1, characterized in that, Both the upper and lower conveyor roller groups include multiple conveyor rollers spaced apart along the conveying direction of the substrate component. A first gap formed between two adjacent upper conveyor rollers and a second gap formed between two adjacent lower conveyor rollers correspond to each other in the vertical direction. The upper air knife assembly includes multiple upper air knives spaced apart along the conveying direction of the substrate component, and the upper air knives are corresponding to the first gap in the vertical direction. The lower air knife assembly includes multiple lower air knives spaced apart along the conveying direction of the substrate component, and the lower air knives are corresponding to the second gap in the vertical direction.

3. The preheating device according to claim 2, characterized in that, The lower housing has a second cavity at both ends of the lower air knife. The second cavity extends along the conveying direction of the substrate component. The lower housing has a plurality of return holes spaced apart along the length of the second cavity.

4. The preheating device according to claim 3, characterized in that, The lower housing also has a third cavity. The first cavity and the second cavity are spaced apart from the third cavity. Each of the second cavities is connected to the third cavity through a return pipe. The second air inlet is connected to each of the second cavities through the third cavity.

5. The preheating device according to claim 4, characterized in that, The lower housing includes a first lower housing, a second lower housing, and a third lower housing. The first lower housing and the third lower housing are arranged side by side along the conveying direction of the substrate component. The first lower housing has a first cavity, the third lower housing has a third cavity, and the second lower housing has a second cavity. The second lower housing is mounted on both sides of the first lower housing that are parallel to the conveying direction of the substrate component. The top plate of the second lower housing is provided with the return hole.

6. The preheating device according to claim 5, characterized in that, The conveying mechanism further includes two mounting brackets spaced apart along the conveying direction perpendicular to the substrate component. The mounting brackets are correspondingly installed on the outside of the second lower housing. The conveying roller is installed between the two mounting brackets. When the upper air knife and the lower air knife are projected onto the top surface of the first lower housing, both ends of the upper air knife and the lower air knife do not extend beyond the top surface of the first lower housing.

7. The preheating device according to claim 6, characterized in that, The mounting bracket is equipped with several temperature sensors, which are used to detect the air temperature between two of the mounting brackets.

8. The preheating device according to claim 2, characterized in that, One side of the upper housing is hinged to the housing via a first hinge axis arranged parallel to the conveying direction of the substrate component, and the other side of the upper housing is hinged to the housing via a drive cylinder. The drive cylinder is used to drive the upper housing to rotate around the first hinge axis so that the upper housing moves closer to or further away from the lower housing.

9. The preheating device according to claim 1, characterized in that, The fan assembly includes a fan and a heater. The fan is provided with a third air outlet, a first air inlet and a second air inlet. The heater is provided with a third air inlet, a first air outlet and a second air outlet. The third air outlet and the third air inlet are connected. The first cavity of the lower housing and the inner cavity of the upper housing are both provided with air filters.

10. The preheating device according to claim 1, characterized in that, The housing is provided with an inlet and an outlet at intervals along the conveying direction of the substrate component. The conveying mechanism is installed between the inlet and the outlet so that the substrate component enters between the upper conveying roller group and the lower conveying roller group through the inlet and is then conveyed to the outlet. Both the inlet and the outlet are provided with detection sensors.

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