Heating system of curing oven

Abstract

The utility model discloses a heating system of a curing oven, which comprises an air cavity cover, a fan and a heating component, a wind wheel and the heating component are positioned in an air duct, the wind wheel and the heating component are positioned in the middle of the air duct, the air duct with a large middle and two small ends is formed in the air cavity cover, and two ends of the air duct discharge air downwards to form two air flows. The two conveying lines are arranged under the two air flows, the two hot air flows are just blown to the two conveying lines respectively, heat is sprayed to the conveying lines in a concentrated mode, and the baking efficiency is high.

Description

Technical Field

[0001] The utility model relates to the field of curing furnaces, in particular to a heating system of a curing furnace. Background Art

[0002] Curing ovens are devices used in the electronics industry and other industries to heat parts, cure resins, and dry them in order to enhance the stress of material bonding. The curing oven has a conveyor line for conveying products, and a heating system is provided above the conveyor line. The heating system provides hot air in the curing oven to bake the products. Common curing ovens have only one product conveyor line, and their heating system has only one fan. When the curing oven is equipped with two parallel conveyor lines, the hot air of the heating system cannot be accurately blown on the products of the two conveyor lines, and the baking efficiency is low, resulting in heat waste. Utility Model Content

[0003] In view of the deficiencies of the prior art, the utility model provides a heating system for a curing furnace, which outputs two hot air flows, which can be blown respectively onto two parallel conveying lines configured in the curing furnace, thereby achieving high baking efficiency for the double conveying lines.

[0004] In order to achieve the above object, the utility model is realized by the following technical solutions:

[0005] A heating system of a curing furnace, comprising an air chamber cover, a fan and a heating component, wherein the air chamber cover is in a square shape and comprises a top plate, a bottom plate, a first side plate, a second side plate, a third side plate and a fourth side plate, wherein the first side plate is opposite to the second side plate, the third side plate is opposite to the fourth side plate, the top plate is opposite to the bottom plate, and the bottom plate is a mesh plate;

[0006] Two side wind shields and a horizontal wind shield are provided inside the wind cavity cover, a gap is provided between the horizontal wind shield and the bottom plate, the two side wind shields are located between the horizontal wind shield and the top plate, an air duct with a large middle and small ends is formed between the two side wind shields, the horizontal wind shield and the top plate, two ends of the horizontal wind shield are respectively connected to the first side plate and the second side plate, and the other two ends of the horizontal wind shield are respectively connected to the third side plate and the fourth side plate with gaps for air outlet;

[0007] The fan and the heating component are located in the air duct, the fan is located in the middle of the air duct, and the motor is installed on the top of the top plate and connected to the fan;

[0008] The heating components have two groups, one group of heating components is located between the fan and the third side plate, and the other group of heating components is located between the fan and the fourth side plate;

[0009] The horizontal wind shield and the bottom plate are provided with through holes at positions corresponding to the fans, and an air inlet pipe is installed in the through holes. The air inlet pipe is connected with the fans and the space below the bottom plate.

[0010] In one embodiment, the bottom plate is in contact with the first side plate, the second side plate, the third side plate, and the fourth side plate on all sides to close the bottom of the air cavity cover.

[0011] In one embodiment, the third side panel and the fourth side panel extend to the bottom of the bottom panel, and there is a gap between the bottom panel and the third side panel and the fourth side panel for hot air to flow downward. Two opposing side mesh panels are also provided under the air cavity cover, and the two side mesh panels are located between the third side panel and the fourth side panel, one of the side mesh panels is opposite to the third side panel and there is a gap between the two, and the other side mesh panel is opposite to the fourth side panel and there is a gap between the two.

[0012] Furthermore, the heating component is a heating fin.

[0013] The utility model has the following beneficial effects:

[0014] The heating system forms two hot air flows, and through the restriction of the horizontal wind shield, the two hot air flows are output from the two ends of the bottom of the wind cavity cover. The two conveying lines are respectively arranged directly below the gap between the horizontal wind shield and the third side plate, and directly below the gap between the horizontal wind shield and the fourth side plate. The two hot air flows are blown onto the two conveying lines respectively, so that one fan can accurately supply air to the two conveying lines, so that the heat is concentrated and sprayed on the conveying lines, and the baking efficiency is high.

[0015] For the double-layer conveyor line, by extending the third side plate and the fourth side plate and adding two side mesh plates, when the fan is working, part of the hot air passes through the holes on the bottom plate and flows downward to bake the upper layer products, and another part of the hot air is transported from the outside of the side mesh plate to between the two side mesh plates, forming a lateral airflow to bake the lower layer products. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a heating system of a curing furnace in Example 1;

[0017] Figure 2 yes Figure 1 A three-dimensional cross-sectional view of a heating system of a curing oven;

[0018] Figure 3 yes Figure 2 A front view of the heating system showing the circulation path of the wind in the heating system;

[0019] Figure 4 is an assembly diagram of two side wind shields and a wind cavity cover of the first embodiment;

[0020] Figure 5 Schematic diagram of the heating system of the curing oven of the second embodiment, wherein the first side plate, the second side plate, the third side plate and the fourth side plate are not shown. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0023] Embodiment 1

[0024] like Figures 1 to 4 As shown, this embodiment discloses a heating system of a curing furnace, which is used to bake the products input into the curing furnace by the conveyor line. The heating system includes an air chamber cover 1, a fan 2, a motor 12 and a heating component 3. The air chamber cover 1 is square, and includes a top plate 4, a bottom plate 5, a first side plate 6, a second side plate 7, a third side plate 8, and a fourth side plate 9. The first side plate 6 and the second side plate 7 are opposite to each other, and the third side plate 8 and the fourth side plate 9 are opposite to each other. The top plate 4 and the bottom plate 5 are opposite to each other. The bottom plate 5 is a mesh plate (that is, an air outlet plate) and its four sides are in contact with the first side plate 6, the second side plate 7, the third side plate 8, and the fourth side plate 9 to close the bottom of the air chamber cover 1; two side windshields 10 and a horizontal windshield 11 are arranged inside the air chamber cover 1, and there is a gap between the horizontal windshield 11 and the bottom plate 5. The two side windshields 10 are located between the horizontal windshield 11 and the top plate 4. The two side windshields 10, the horizontal windshield 11 and the top plate 4 are located between the horizontal windshield 11 and the bottom plate 5. An air duct with a large middle and small two ends (similar to an hourglass) is formed between the plate 11 and the top plate 4, and two ends of the horizontal wind shield plate 11 are respectively connected to the first side plate 6 and the second side plate 7, and the other two ends of the horizontal wind shield plate 11 are respectively provided with gaps for air outlet between the third side plate 8 and the fourth side plate 9; the fan and the heating component 3 are located in the air duct, the fan 2 is located in the middle of the air duct, and the motor 12 is installed on the top of the top plate 4 and connected to the fan 2; the heating component 3 has two groups, one group of heating components 3 is located between the fan and the third side plate 8, and the other group of heating components 3 is located between the fan and the fourth side plate 9; the horizontal wind shield plate 11 and the bottom plate 5 are provided with through holes at positions corresponding to the fans, and an air inlet pipe 13 is installed in the through holes, and the air inlet pipe 13 is connected to the fan 2 and the space below the bottom plate 5.

[0025] The heating system is installed in the curing furnace and the fan 2 is started. The cold air under the air chamber cover 1 passes through the air inlet pipe 13 and the fan 2 and is divided into two paths and moves toward the third side plate 8 and the fourth side plate 9. The cold air is heated to form hot air when passing through the heating component 3. There are gaps between the horizontal wind shield plate 11 and the third side plate 8 and the fourth side plate 9. The hot air flows from the two gaps between the horizontal wind shield plate 11 and the mesh plate, and finally enters under the mesh plate to heat and bake the products under the mesh plate.

[0026] The heating system forms two hot air flows, and through the restriction of the horizontal wind shield 11, the two hot air flows are output from the two ends of the bottom of the wind cavity cover 1, and the two conveying lines are respectively arranged directly below the gap between the horizontal wind shield 11 and the third side plate 8, and directly below the gap between the horizontal wind shield 11 and the fourth side plate 9. The two hot air flows are blown onto the two conveying lines respectively, so that one fan 2 can accurately supply air to the two conveying lines, so that the heat is concentrated and sprayed on the conveying lines.

[0027] In order to avoid heat loss, the outside of the air cavity cover 1 is packaged with sheet metal, at least the top of the air cavity cover 1 and the outside of the first side plate 6 and the second side plate 7 are provided with sheet metal, and the inside of the sheet metal is provided with thermal insulation cotton.

[0028] The heating component 3 in this embodiment is a heating fin, but is not limited thereto in other embodiments, and may be, for example, a stainless steel heating tube, etc. Some parts of the air chamber cover 1, such as the top plate 4 and the four side plates, may be replaced by the furnace wall of the curing furnace. The top plate 4, the bottom plate 5, the horizontal wind shield plate 11 and the two side wind shield plates 10 may be fixed on the frame of the curing furnace, and in this case, the first side plate 6 and the second side plate 7 may be omitted.

[0029] Heating principle: The heating fins can heat themselves after being energized, thereby heating the surrounding air. Fan 2 draws the cold air from below and blows it toward the heating fins to form hot air. The hot air is blocked by the wind shield and blown toward the air outlet plate, and then blows toward the product surface through the small holes evenly distributed on the air outlet plate. This cycle heats the air in the equipment and realizes the heating function.

[0030] Insulation principle: The outside of the air cavity cover 1 is encapsulated by a sheet metal door panel, and heat insulation cotton is pasted in the middle of the sheet metal door panel to achieve the insulation function.

[0031] Temperature control principle: Each heating cavity is equipped with a thermocouple to monitor the temperature in the cavity in real time, and feed the temperature back to the PLC. The PLC controls the inverter of the heating fin to control the working voltage of the heating fin, thereby achieving temperature control.

[0032] Embodiment 2

[0033] In order to improve production efficiency, some curing furnaces use an upper double-layer conveyor line. When the heating system of the first embodiment is used for baking, the lower conveyor line is blocked by the upper conveyor line, and it is difficult for hot air to blow to the lower conveyor line. Figure 5 The heating system of the curing furnace of this embodiment is different from that of the first embodiment in that:

[0034] The third side plate 8 and the fourth side plate 9 extend below the bottom plate 5, and there is a gap between the bottom plate 5 and the third side plate 8 and the fourth side plate 9 for the hot air flow to flow downward. Two opposite side mesh plates 14 are also provided below the air chamber cover 1, and the two side mesh plates 14 are located between the third side plate 8 and the fourth side plate 9, one of the side mesh plates 14 is opposite to the third side plate 8 with a gap therebetween, and the other side mesh plate 14 is opposite to the fourth side plate 9 with a gap therebetween, and a conveying channel for the double-layer conveying assembly to pass through is formed between the two side mesh plates 14.

[0035] The heating system of this embodiment is suitable for supplying air to a double-layer conveyor line. Since the third side plate 8 and the fourth side plate 9 are extended and two side mesh plates 14 are added, when the fan is working, a part of the hot air passes through the holes on the bottom plate 5 and flows downward to bake the upper layer products, and another part of the hot air is transported from the outside of the side mesh plate 14 to between the two side mesh plates 14, forming a lateral airflow to bake the lower layer products. The first side plate 6, the second side plate 7, the third side plate 8 and the fourth side plate 9 are not shown in the figure, and these side plates can be replaced by the furnace wall of the curing furnace.

[0036] As described above, the embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. These modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model. Therefore, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the protection scope of the utility model.

Claims

1. A heating system for a curing furnace, characterized in that: The wind chamber cover comprises a wind chamber cover, a fan and a heating component. The wind chamber cover is square and comprises a top plate, a bottom plate, a first side plate, a second side plate, a third side plate and a fourth side plate. The first side plate is opposite to the second side plate, the third side plate is opposite to the fourth side plate, the top plate is opposite to the bottom plate, and the bottom plate is a mesh plate. Two side wind shields and a horizontal wind shield are provided inside the wind cavity cover, a gap is provided between the horizontal wind shield and the bottom plate, the two side wind shields are located between the horizontal wind shield and the top plate, an air duct with a large middle and small ends is formed between the two side wind shields, the horizontal wind shield and the top plate, two ends of the horizontal wind shield are respectively connected to the first side plate and the second side plate, and the other two ends of the horizontal wind shield are respectively connected to the third side plate and the fourth side plate with gaps for air outlet; The fan and the heating component are located in the air duct, the fan is located in the middle of the air duct, and the motor is installed on the top of the top plate and connected to the fan; The heating components have two groups, one group of heating components is located between the fan and the third side plate, and the other group of heating components is located between the fan and the fourth side plate; The horizontal wind shield and the bottom plate are provided with through holes at positions corresponding to the fans, and an air inlet pipe is installed in the through holes. The air inlet pipe is connected with the fans and the space below the bottom plate.

2. The heating system of the curing furnace according to claim 1, characterized in that: The bottom plate is in contact with the first side plate, the second side plate, the third side plate and the fourth side plate around to close the bottom of the air cavity cover.

3. The heating system of the curing furnace according to claim 1, characterized in that: The third side panel and the fourth side panel extend to the bottom of the bottom panel, and there is a gap between the bottom panel and the third side panel and the fourth side panel for hot air to flow downward. Two opposing side mesh panels are also provided under the air cavity cover, and the two side mesh panels are located between the third side panel and the fourth side panel, one of the side mesh panels is opposite to the third side panel and there is a gap between the two, and the other side mesh panel is opposite to the fourth side panel and there is a gap between the two.

4. The heating system of the curing furnace according to claim 1, characterized in that: The heating element is a heating fin.

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