A low-temperature and highly efficient heat exchange drying furnace

Abstract

The present invention relates to the technical field of machining of finned heat exchangers, and specifically, to a low-temperature and high-efficiency heat exchange drying furnace. It includes a furnace body, inside which a conveying plate is provided. A purging mechanism and a flow splitting mechanism are respectively provided on the furnace body and the conveying plate, and the purging mechanism, the flow splitting mechanism and the workpiece are docked one by one; by starting the hydraulic rod, the present invention drives the connection between the air delivery pipe and the air inlet pipe, and then blows the purified air into the heat exchanger through the air delivery pipe and the flow splitting jig; since the inside of the heat exchanger is in a U-shaped structure and the air blowing branch holes are docked with part of the air inlet end of the heat exchanger, the heat exchanger has air inlet at one end and air outlet at the other end. This directional air inlet method ensures the orderly flow of air in the heat exchanger tubes, thereby taking out the oil and gas inside the heat exchanger and improving the drying effect inside the heat exchanger; at the same time, the air blowing branch holes are docked with part of the air inlet end of the heat exchanger, so that the air blowing branch holes blow air into each U-shaped tube to achieve uniform drying.

Description

Technical Field

[0001] The present invention relates to the technical field of machining of fin heat exchangers, and more specifically, to a low-temperature and high-efficiency heat exchange drying furnace. Background Art

[0002] A heat exchanger (also known as a heat exchanger or heat exchange equipment) is a device used to transfer heat from a hot fluid to a cold fluid to meet the specified process requirements, and it is an industrial application of convective heat transfer and heat conduction. During the manufacturing process of a heat exchanger, volatile processing lubricating oil is used to stamp fins and process copper tubes. After the tube expansion of the heat exchanger is completed, it is necessary to remove the attached processing lubricating oil, and the equipment used to remove the lubricating oil is a drying furnace.

[0003] When drying existing heat exchangers, a drying furnace usually uses the method of circulating hot air heated by an electric heater. After heating the workpiece to a certain temperature, a blower is aimed at the U-shaped pipe orifice of the heat exchanger, and clean air is blown into the U-shaped pipe to take away the oil and gas inside the pipe. The circulating hot air in the furnace will blow away the oil and gas on the surface of the heat exchanger and be discharged out of the furnace by an exhaust fan. However, the U-shaped pipe of the heat exchanger is a slender structure, and the effect of using a blower to purge the oil and gas inside the pipe is poor. Therefore, the heating temperature of the drying furnace cannot be too low, which increases the energy consumption of the device.

[0004] Moreover, if the oil and gas inside the pipe are not purged cleanly, it will have a greater impact on the subsequent vacuum drying process, and it is easy to pollute the vacuum system, resulting in a poor vacuum condition. In view of this, we propose a low-temperature and high-efficiency heat exchange drying furnace. Summary of the Invention

[0005] The purpose of the present invention is to provide a low-temperature and high-efficiency heat exchange drying furnace to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides a low-temperature and high-efficiency heat exchange drying furnace, including a furnace body. A conveyor plate is arranged inside the furnace body, and a purging mechanism and a flow splitting mechanism are respectively arranged on the furnace body and the conveyor plate, and the purging mechanism, the flow splitting mechanism and the workpiece are docked one by one.

[0007] Compressed gas is blown into the flow splitting mechanism through the purging mechanism. The outlet end of the flow splitting mechanism corresponds to a part of the inlet end of the workpiece, so that the compressed air enters the workpiece along a specific path, that is, one end of the workpiece intakes air and the other end discharges air, so that the air forms an orderly flow inside the workpiece, and the moisture or oil and gas inside the workpiece are taken out.

[0008] As a further improvement of this technical solution, the purging mechanism at least includes a support plate fixedly connected to the outer wall of the furnace body. An installation plate is slidably connected to the support plate, and an air delivery pipe is fixedly connected to the installation plate.

[0009] As a further improvement of this technical solution, the flow splitting mechanism at least includes a flow splitting jig fixedly connected to the conveyor plate. A plurality of air blowing branch holes are fixedly connected to the side of the flow splitting jig away from the air delivery pipe, and exhaust grooves are formed between every two of the air blowing branch holes.

[0010] As a further improvement of this technical solution, two air inlet pipes are fixedly connected to the side of the flow splitting jig away from the air blowing branch holes, and the air inlet pipes are in snap-fit connection with the air outlet end of the air delivery pipe.

[0011] As a further improvement of this technical solution, grooves are formed inside both of the two air inlet pipes, and the circular diameter size of the grooves is in snap-fit connection with the circular diameter size of the air delivery pipe. Sealing rings are fixedly connected inside the grooves.

[0012] As a further improvement of this technical solution, a partition plate is fixedly connected inside the flow splitting jig. A plurality of through holes are formed in the partition plate, and the through holes correspond to the air blowing branch holes one by one.

[0013] As a further improvement of this technical solution, a hydraulic rod is fixedly installed on the support plate, and the output end of the hydraulic rod is fixedly connected to one side of the mounting plate.

[0014] As a further improvement of this technical solution, a plurality of fixing plates are fixedly connected to the conveyor plate, and connecting plates are rotatably connected to one side of each of the plurality of fixing plates.

[0015] As a further improvement of this technical solution, a heat exchanger is snap-fitted inside each two adjacent connecting plates, and a part of the air inlet end of the heat exchanger corresponds to the air blowing branch holes.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. In this low-temperature and high-efficiency heat exchange drying furnace, by starting the hydraulic rod, the docking between the air delivery pipe and the air inlet pipes is driven, and then the purified air is blown into the heat exchanger through the air delivery pipe and the flow splitting jig;

[0018] Since the inside of the heat exchanger is in a U-shaped structure and the air blowing branch holes are docked with a part of the air inlet end of the heat exchanger, air enters from one end of the heat exchanger and exits from the other end. This directional air inlet method ensures that the air forms an orderly flow inside the heat exchanger pipes, thereby effectively taking out the oil and gas inside the heat exchanger, and further improving the drying effect inside the heat exchanger;

[0019] At the same time, the air blowing branch holes are docked with a part of the air inlet end of the heat exchanger, so that the air blowing branch holes blow air into each U-shaped pipe inside, which can ensure that the oil and gas inside the pipes are removed, create good conditions for vacuum drying, achieve uniform drying, ensure that the drying effect of each U-shaped pipe is consistent, and thus improve the quality stability of the product.

[0020] 2. In this low-temperature and high-efficiency heat exchanger drying furnace, air is blown into the interior of the heat exchanger through the air-blowing branch holes. While improving the drying effect inside the heat exchanger tubes, this enables good drying quality to be achieved at a relatively low furnace body temperature, eliminating the need to excessively increase the furnace body temperature to ensure the drying effect, thereby achieving energy conservation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic perspective view of the overall structure of the present invention;

[0022] Figure 2 It is a schematic view of the internal component structure of the furnace body of the present invention;

[0023] Figure 3 It is a schematic view of the structure of the purging mechanism and the flow splitting mechanism of the present invention;

[0024] Figure 4 It is a schematic cross-sectional view of the flow splitting mechanism of the present invention;

[0025] Figure 5 It is a schematic enlarged view of part A of the present invention;

[0026] Figure 6 It is a schematic view of the flow splitting mechanism of the present invention;

[0027] Figure 7 It is an exploded view of the flow splitting mechanism of the present invention;

[0028] Figure 8 It is a schematic cross-sectional view of the fixing plate of the present invention.

[0029] The meanings of the various reference numerals in the figure are as follows:

[0030] 100, furnace body; 110, conveyor plate; 120, heat exchanger; 130, fixing plate; 131, connecting plate;

[0031] 200, purging mechanism; 210, support plate; 211, mounting plate; 212, gas delivery pipe; 220, hydraulic rod;

[0032] 300, flow splitting mechanism; 310, flow splitting fixture; 311, air-blowing branch hole; 312, intake pipe; 313, partition plate; 314, sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] During the manufacturing process of heat exchangers in the refrigeration industry, volatile processing lubricating oil is used for stamping fins and processing copper tubes. However, after the tube expanding of the heat exchanger, it is necessary to remove the attached processing lubricating oil. The equipment used for removing the lubricating oil is a drying furnace. The drying furnace generally uses an electric heater to circulate hot air for heating. After heating the workpiece to a certain temperature, a blower is aimed at the U-shaped tube orifice to blow clean air into the inside of the U-shaped tube to carry away the oil and gas inside the tube. The circulating hot air in the furnace will blow away the oil and gas on the surface of the heat exchanger and be discharged outside the furnace together by the exhaust fan;

[0035] Since the U-shaped tube of the heat exchanger is a slender structure, the effect of using a blower to purge the oil and gas inside the tube is poor. Therefore, the heating temperature of the drying furnace cannot be too low. In terms of quality, incomplete purging of the oil and gas inside the tube has a great impact on the subsequent vacuum drying process, and it is easy to contaminate the vacuum system and cause poor vacuum. Therefore, please refer to Figures 1 - 8 As shown, this embodiment provides a low-temperature and high-efficiency heat exchanger drying furnace, including a furnace body 100. A transfer plate 110 is arranged inside the furnace body 100. A purging mechanism 200 and a flow splitting mechanism 300 are respectively arranged on the furnace body 100 and the transfer plate 110. The purging mechanism 200, the flow splitting mechanism 300 and the workpiece are docked one by one. The purging mechanism 200 blows the purified air into the inside of the flow splitting mechanism 300, and then the flow splitting mechanism 300 blows it into the workpiece;

[0036] By blowing compressed gas into the flow splitting mechanism 300 through the purging mechanism 200, the air outlet end of the flow splitting mechanism 300 corresponds to a part of the air inlet end of the workpiece, so that the compressed air enters the workpiece along a specific path, that is, one end of the workpiece intakes air and the other end discharges air, so that the air forms an orderly flow inside the workpiece, taking out the moisture or oil and gas inside the workpiece. Not only the moisture or oil and gas inside the workpiece are taken out, improving the drying effect inside the workpiece and ensuring the same drying effect for each U-shaped tube, but also the heating temperature of the furnace body 100 can be reduced, thus achieving an energy-saving effect.

[0037] In this invention, considering that when the existing heat exchanger is dried, a blower is usually aimed at the U-shaped tube orifice of the heat exchanger to blow clean air into the inside of the U-shaped tube to carry away the oil and gas inside the tube. However, the U-shaped tube of the heat exchanger is a slender structure, and the effect of using a blower to purge the oil and gas inside the tube is poor. Therefore, a purging mechanism 200 and a flow splitting mechanism 300 are set. The purified air is blown into the inside of the flow splitting mechanism 300 through the purging mechanism 200, so that the air inside the flow splitting mechanism 300 can be blown into the workpiece. The inside of the workpiece is U-shaped. Since the flow splitting mechanism 300 is docked with a part of the air inlet end of the workpiece, one end of the workpiece intakes air and the other end discharges air. This directional air intake method ensures that the air forms an orderly flow inside the workpiece tube, thus effectively taking out the moisture or oil and gas inside the workpiece and greatly improving the drying effect inside the workpiece;

[0038] Considering that the blower has a poor effect in sweeping the oil and gas inside the pipe, the heating temperature of the drying furnace cannot be too low, which increases the energy consumption of the device; therefore, when drying the inside of the workpiece, the circulating hot air in the furnace body 100 continues to play a role, blowing away the oil and gas on the surface of the workpiece, and blowing the air into the workpiece through the diversion mechanism 300, so that the drying effect inside the workpiece is improved. Since the drying inside the workpiece pipe is strengthened, better drying quality can be achieved at a lower temperature of the furnace body 100, and there is no need to increase the temperature of the furnace body 100 too much to ensure the drying effect, thereby achieving energy saving;

[0039] In addition, if the oil and gas in the tube are not completely purged, it will have a great impact on the subsequent vacuum drying process, and it is easy to contaminate the vacuum system and cause a poor vacuum condition; therefore, when the diverter mechanism 300 corresponds to the air inlet end of the workpiece part respectively, the diverter mechanism 300 blows the purging air into each U-shaped tube, which can ensure that the oil and gas in the tube are removed, create good conditions for vacuum drying, achieve uniform drying, and ensure that the drying effect of each U-shaped tube is consistent, thereby improving the quality stability of the product.

[0040] The purified gas is transmitted, such as Figures 2 - 3 As shown, the specific structure of the purge mechanism 200 is further disclosed. The purge mechanism 200 at least includes a support plate 210 fixedly connected to the outer wall of the furnace body 100, and a mounting plate 211 is slidably connected to the support plate 210. A gas pipe 212 is fixedly connected to the mounting plate 211, and the purified air is input into the gas pipe 212. Subsequently, the gas is blown into the channel through the gas pipe 212 to ensure stable gas delivery.

[0041] The gas in the diversion fixture 310 is blown into the workpiece, such as Figures 6 - 7 As shown, the specific structure of the diverter mechanism 300 is further disclosed. The diverter mechanism 300 at least includes a diverter fixture 310 fixedly connected to the conveying plate 110. A plurality of blowing branch holes 311 are fixedly connected to the side of the diverter fixture 310 away from the gas pipe 212. Exhaust grooves are formed between the two blowing branch holes 311. During the drying process of the workpiece, when the oil and gas in the pipe are discharged, the exhaust grooves can guide the gas to flow along a specific path to avoid disorderly diffusion of the gas in the surrounding environment. The air inlet end of the workpiece is connected to the blowing branch hole 311, and the gas inside the diverter fixture 310 is input into the workpiece through the blowing branch hole 311.

[0042] The gas in the gas delivery pipe 212 needs to be input into the flow dividing fixture 310, such as Figures 4 - 5As shown, on one side of the flow divider fixture 310 away from the air blowing branch holes 311, two air inlet pipes 312 are fixedly connected, and the air inlet pipes 312 are snap-fitted with the outlet end of the air delivery pipe 212. The air inlet pipes 312 are docked with the outlet end of the air delivery pipe 212, and the gas inside the air delivery pipe 212 is input into the flow divider fixture 310 through the air inlet pipes 312.

[0043] When the gas inside the air delivery pipe 212 is input into the flow divider fixture 310 through the air inlet pipes 312, in order to reduce the possibility of gas leakage, as Figure 5 shown, grooves are formed inside both of the two air inlet pipes 312, and the circular diameter size of the grooves is snap-fitted with the circular diameter size of the air delivery pipe 212. Sealing rings 314 are fixedly connected inside the grooves. When the air delivery pipe 212 is inserted into the air inlet pipes 312, the air delivery pipe 212 abuts against the sealing rings 314, so that the sealing rings 314 can closely fit with the outer wall of the air delivery pipe 212, thereby forming an effective seal and reducing the possibility of gas leakage.

[0044] In order for the gas inside the flow divider fixture 310 to flow evenly to each air blowing branch hole 311, as Figure 5 shown, a partition plate 313 is fixedly connected inside the flow divider fixture 310. A plurality of through holes are formed on the partition plate 313, and the through holes correspond to the air blowing branch holes 311 one by one. After the gas enters the flow divider fixture 310 through the air inlet pipes 312, the partition plate 313 can play a role in evenly distributing the air flow, and the gas inside the flow divider fixture 310 can flow evenly to each air blowing branch hole 311 through the through holes on the partition plate 313.

[0045] In order to drive the docking between the air delivery pipe 212 and the air inlet pipes 312, as Figure 7 shown, a hydraulic rod 220 is fixedly installed on the support plate 210, and the output end of the hydraulic rod 220 is fixedly connected to one side of the mounting plate 211. When the hydraulic rod 220 is started, the support plate 210 is driven to move, thereby driving the air delivery pipe 212 to move and docking the air delivery pipe 212 with the air inlet pipes 312.

[0046] When drying the heat exchanger 120, it is necessary to ensure the stability of the heat exchanger 120, as Figure 8 shown, a plurality of fixing plates 130 are fixedly connected to the conveyor plate 110, and one side of each of the plurality of fixing plates 130 is rotatably connected to a connecting plate 131. The other sides of the fixing plates 130 and the connecting plate 131 are fixedly connected by bolts. When it is necessary to fix the heat exchanger 120 between the fixing plates 130 and the connecting plate 131, the bolts are removed, then the connecting plate 131 is rotated so that the connecting plate 131 does not block the upper part of the fixing plate 130, then the heat exchanger 120 is placed on the fixing plate 130, then the connecting plate 131 is rotated to make the connecting plate 131 reset, and finally the fixing plates 130 and the connecting plate 131 are connected by bolts.

[0047] Blow the gas inside the flow splitting fixture 310 into the heat exchanger 120. As Figure 4 shown, the heat exchanger 120 is snap - fitted inside each pair of adjacent connecting plates 131. A part of the air inlet end of the heat exchanger 120 corresponds to the blowing branch holes 311, and the blowing branch holes 311 are docked with a part of the air inlet end of the heat exchanger 120, so that the heat exchanger 120 intakes air at one end and discharges air at the other end. This directional air intake method ensures that the air forms an orderly flow inside the tubes of the heat exchanger 120, effectively taking out the moisture and oil - gas inside the heat exchanger 120, and thus improving the drying efficiency inside the heat exchanger 120.

[0048] Working principle: First, pre - heat the heat exchanger 120 with hot air. When it is detected that the heat exchanger 120 reaches the position of the gas transmission pipe 212, the heat exchanger 120 stops moving. Then, by starting the hydraulic rod 220, the support plate 210 is driven to move, thereby driving the gas transmission pipe 212 to move, docking the gas transmission pipe 212 with the air inlet pipe 312. Then, the purified air is blown into the inside of the flow splitting fixture 310 through the gas transmission pipe 212. Thus, the gas inside the flow splitting fixture 310 is blown into the inside of the heat exchanger 120 through the blowing branch holes 311. And the inside of the heat exchanger 120 is in a U - shape. Since the blowing branch holes 311 are docked with a part of the air inlet end of the heat exchanger 120, the heat exchanger 120 intakes air at one end and discharges air at the other end. This directional air intake method ensures that the air forms an orderly flow inside the tubes of the heat exchanger 120, effectively taking out the moisture and oil - gas inside the heat exchanger 120, greatly improving the drying efficiency inside the heat exchanger 120;

[0049] By blowing the gas into the inside of the heat exchanger 120 through the flow splitting fixture 310, while greatly improving the drying effect inside the heat exchanger 120, the circulating hot air inside the furnace body 100 continues to play a role in blowing away the oil - gas on the surface of the heat exchanger 120. Since the drying inside the tubes of the heat exchanger 120 is strengthened, the drying process of the entire heat exchanger 120 is more efficient, enabling better drying quality at a lower temperature of the furnace body 100. In this way, the heat distribution during the drying process of the heat exchanger 120 is more reasonable, and there is no need to excessively increase the temperature of the furnace body 100 to ensure the drying effect, thus achieving energy conservation;

[0050] And two sets of the purging mechanism 200 and the flow splitting mechanism 300 are provided. When the heat exchanger 120 reaches the middle and the end of the furnace body 100, it can be purged from one side, thus greatly reducing the residual oil amount inside the heat exchanger 120.

[0051] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and the descriptions in the specification are only preferred examples of the present invention, and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A low-temperature and high-efficiency heat exchange drying furnace, comprising a furnace body (100), wherein a conveying plate (110) is arranged inside the furnace body (100), and is characterized in that: The furnace body (100) and the conveyor plate (110) are respectively provided with a purging mechanism (200) and a flow splitting mechanism (300), and the purging mechanism (200), the flow splitting mechanism (300) and the workpieces are docked one by one; Compressed gas is blown into the flow splitting mechanism (300) through the purging mechanism (200). The gas outlet end of the flow splitting mechanism (300) corresponds to a part of the gas inlet end of the workpiece, so that the compressed air enters the workpiece along a specific path, that is, one end of the workpiece is for air inlet and the other end is for air outlet, so that the air forms an orderly flow inside the workpiece, and the moisture or oil and gas inside the workpiece are carried out; The purging mechanism (200) at least includes a support plate (210) fixedly connected to the outer wall of the furnace body (100). An installation plate (211) is slidably connected to the support plate (210). An air delivery pipe (212) is fixedly connected to the installation plate (211). The flow splitting mechanism (300) at least includes a flow splitting fixture (310) fixedly connected to the conveyor plate (110). A plurality of air blowing branch holes (311) are fixedly connected to the side of the flow splitting fixture (310) away from the air delivery pipe (212). An exhaust groove is formed between every two of the air blowing branch holes (311). A partition plate (313) is fixedly connected inside the flow splitting fixture (310). A plurality of through holes are formed in the partition plate (313), and the through holes correspond to the air blowing branch holes (311) one by one; Two air inlet pipes (312) are fixedly connected to the side of the flow splitting fixture (310) away from the air blowing branch holes (311), and the air inlet pipes (312) are clamped and adapted to the gas outlet end of the air delivery pipe (212); A plurality of fixing plates (130) are fixedly connected to the conveyor plate (110), and a connecting plate (131) is rotatably connected to one side of each of the plurality of fixing plates (130). A heat exchanger (120) is clamped inside every two adjacent connecting plates (131), and a part of the gas inlet end of the heat exchanger (120) corresponds to the air blowing branch holes (311).

2. The low-temperature and high-efficiency heat exchange drying furnace according to claim 1, wherein: Grooves are formed inside the two air inlet pipes (312), and the circular diameter dimensions of the grooves are clamped and adapted to the circular diameter dimensions of the air delivery pipe (212). Sealing rings (314) are fixedly connected inside the grooves.

3. The low-temperature and high-efficiency heat exchange drying furnace according to claim 1, characterized in that: A hydraulic rod (220) is fixedly installed on the support plate (210), and the output end of the hydraulic rod (220) is fixedly connected to one side of the installation plate (211).

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