A plate heat exchanger

Abstract

The present invention discloses a plate heat exchanger, which relates to the field of heat exchangers and solves the problem that the existing plate heat exchangers are prone to particle impurity accumulation. It includes: a heat exchanger body and a mounting frame fixedly installed on the outside of the heat exchanger body. A heat medium inlet pipe and a refrigerant inlet pipe are fixedly installed on the outside of the heat exchanger body, and filter nets are arranged at the ends of the heat medium inlet pipe and the refrigerant inlet pipe away from the heat exchanger body; it further includes: a cleaning mechanism for cleaning the impurities on the surface of the filter net, and the cleaning mechanism is installed on the outside of the filter net; through the cleaning mechanism of the present invention, the filter net can filter the gas entering from the heat medium inlet pipe and the refrigerant inlet pipe, prevent particle impurities from entering the heat exchanger body, clean the particle impurities on the surface of the filter net, and enable the filter net to continuously filter the gas, thereby achieving the effect of filtering and preventing blockage.

Description

Technical Field

[0001] The present invention relates to the field of heat exchangers, and specifically to a plate heat exchanger. Background Art

[0002] A heat exchanger is an energy-saving device that realizes heat transfer between materials among two or more fluids at different temperatures. It enables heat to be transferred from a fluid at a higher temperature to a fluid at a lower temperature, so that the fluid temperature reaches the specified index of the process, to meet the needs of process conditions. At the same time, it is also one of the main devices for improving energy utilization efficiency.

[0003] In the industrial field, plate heat exchangers are usually used to recover the heat energy in waste gas, thereby improving the utilization rate of consumption and reducing environmental pollution. The existing Chinese published patent document: CN118391944A discloses a plate heat exchanger. There is a first interval between adjacent two heat exchange plate groups, and a second interval between a first heat exchange plate and a second heat exchange plate. The first interval is greater than the second interval. With such a setting, the width of the first heat exchange cavity in the first direction can be made larger, so as to avoid the accumulation of impurities in the liquid medium between the first heat exchange plate and the second heat exchange plate, and further avoid blockage in the first heat exchange cavity, so as to improve the service life of the plate heat exchanger and reduce the maintenance cost of the plate heat exchanger. However, the waste gas contains a large amount of particulate impurities. If it directly enters the heat exchange cavity, it is easy to cause the situation of heat exchange cavity blockage, and with the adhesion of impurities in the heat exchange cavity, after the impurities adhere and accumulate, it will affect the heat exchange efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a plate heat exchanger to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A plate heat exchanger, comprising: a heat exchanger body and a mounting frame fixedly installed outside the heat exchanger body. A heat medium inlet pipe and a refrigerant inlet pipe are fixedly installed on the outside of the heat exchanger body. The heat medium inlet pipe is located above the refrigerant inlet pipe. A filter screen is provided at one end of the heat medium inlet pipe and the refrigerant inlet pipe away from the heat exchanger body;

[0007] It further comprises:

[0008] A cleaning mechanism for cleaning impurities on the surface of the filter screen. The cleaning mechanism is installed outside the filter screen;

[0009] A material collecting mechanism for centrally collecting the impurities cleaned out from the filter screen. The material collecting mechanism is installed outside the mounting frame;

[0010] A fixed pipe mechanism for intermittently and continuously cleaning the filter screen, and the fixed pipe mechanism is installed on the outer side of the mounting frame.

[0011] Preferably, the cleaning mechanism includes a mounting plate fixedly installed on the outer side of the mounting frame. Two symmetrically distributed circular boxes are fixedly installed on the inner side of the mounting plate. An installation disk is rotatably installed inside the circular box. Four air inlets corresponding to the size of the filter screen are formed on the surface of the installation disk. An air inlet cylinder is fixedly installed inside the air inlet. The size of the air inlet cylinder corresponds to the size of the filter screen. An air inlet connecting pipe is fixedly installed on the outer side of the circular box. The air inlet connecting pipe and the adjacent filter screen are on the same horizontal line. A positioning rod is fixedly installed on the outer side of the installation disk. A driving rod is rotatably installed on one side of the mounting plate close to the mounting frame. A synchronous belt is rotatably installed between the driving rod and the two positioning rods.

[0012] Preferably, the material receiving mechanism includes a positioning plate fixedly installed on the top of the mounting frame. A piston air cylinder is fixedly installed on the top of the positioning plate. A pressing plate is arranged above the piston air cylinder. The bottom of the pressing plate is fixedly connected to the piston rod of the piston air cylinder. A driving motor is fixedly installed on the outer side of the mounting plate. A turntable is fixedly installed at the output end of the driving motor. A connecting rod is hinged and assembled on the outer side of the turntable. The hinged part of the connecting rod and the turntable is far from the center of the turntable. A pulling plate is hinged and assembled at one end of the connecting rod far from the turntable. Two symmetrically distributed pull rods are fixedly installed between the two ends of the pulling plate and the two ends of the pressing plate respectively. A slag removal port is formed on the outer side of the circular box. An exhaust hopper is fixedly installed on the outer side of the slag removal port. The exhaust hopper is connected to the positioning plate and the piston air cylinder through a trachea. A discharge pipe is fixedly installed on one side of the circular box far from the exhaust hopper.

[0013] Preferably, the fixed pipe mechanism includes a driven rod rotatably installed on one side of the mounting plate close to the driving rod. A tooth disc is fixedly installed on the outer side of the driven rod. A first gear matched with the tooth disc is fixedly installed at the output end of the driving motor. A driven disc is fixedly installed on the outer side of the driven rod. Two centrally symmetrically distributed racks are fixedly installed on the outer side of the driven disc. A second gear matched with the rack is fixedly installed on the outer side of the driving rod. And the rack can make the second gear rotate by 90 degrees. Two symmetrically distributed insertion blocks are slidably installed on the inner side of the mounting plate. One end of the insertion block close to the installation disk is of an arc structure. Four slots for the insertion block to be limited and inserted are formed on the outer side of the installation disk. A sliding block is fixedly installed on the outer side of the insertion block. The sliding block is slidably installed on the outer side of the mounting plate. A positioning spring is fixedly installed between the two sliding blocks.

[0014] Preferably, the inner side of the air inlet cylinder is of an annular inclined surface structure, and the outer side of the filter net is made of rubber material.

[0015] Preferably, support sleeve plates are fixedly installed on both sides of the positioning plate, and the pull rod is slidably installed inside the support sleeve plates.

[0016] Preferably, support bottom plates are fixedly installed on the tops of the mounting frame and the mounting plate, and the top of the support bottom plate is fixedly connected to the bottom of the positioning plate.

[0017] Preferably, a sealing plate is fixedly installed at one end of the exhaust hopper close to the circular box, and a plurality of exhaust holes symmetrically distributed about the center are formed on the surface of the sealing plate.

[0018] Preferably, a storage box is fixedly installed between the two discharge pipes, and a breathable filter bag is fixedly installed at the bottom of the storage box.

[0019] Preferably, a guiding sleeve frame is fixedly installed on one side of the mounting plate close to the slider, and the slider is slidably installed outside the guiding sleeve frame.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] Through the cleaning mechanism of the present invention, the filter net can filter the gas entering from the heat medium inlet pipe and the refrigerant inlet pipe, prevent particulate impurities from entering the heat exchange body, clean the particulate impurities on the surface of the filter net, and enable the filter net to continuously filter the gas, thereby achieving the effect of filtering and preventing blockage.

[0022] Through the material collection mechanism of the present invention, when the mounting disc drives the four air inlet cylinders to rotate, the air inlet cylinder filled with impurities can be aligned with the exhaust hopper, and the exhaust hopper can push the impurities in the air inlet cylinder into the discharge pipe through the exhaust holes on the sealing plate. By using the reciprocating movement of the pressing plate, the piston air cylinder can repeatedly convey air into the exhaust hopper, facilitating the comprehensive cleaning of the impurities on the surface of the air inlet cylinder, thereby achieving the effect of facilitating the cleaning and storage of impurities.

[0023] Through the pipe fixing mechanism of the present invention, when the driving motor operates, the two racks on the turntable can intermittently drive the second gear to rotate, and the second gear can drive the intermittent rotation of the two mounting discs through the driving rod, thereby realizing the continuous cleaning of the filter net, ensuring the normal filtering of the gas by the filter net. When the mounting disc rotates, the cooperation of the insertion block and the positioning spring is used to provide positioning for the mounting disc, thereby achieving the effect of continuous cleaning and ensuring the continuous heat exchange of the gas. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 Schematic diagram of the mounting frame and mounting plate in the present invention;

[0026] Figure 3 Schematic diagram of the turntable and pull plate in the present invention;

[0027] Figure 4 Schematic diagram of the intake connection pipe and intake cylinder in the present invention;

[0028] Figure 5 Schematic diagram of the gear disk and circular box in the present invention;

[0029] Figure 6 Schematic diagram of the sealing plate and exhaust hopper in the present invention;

[0030] Figure 7 Schematic diagram of the driven disk and rack in the present invention;

[0031] Figure 8 Schematic diagram of the insertion block and guide sleeve frame in the present invention.

[0032] In the figure: 1. Heat exchanger body; 2. Mounting frame; 3. Heat medium inlet pipe; 4. Refrigerant inlet pipe; 5. Filter net; 6. Mounting plate; 7. Circular box; 8. Mounting disk; 9. Intake cylinder; 10. Intake connection pipe; 11. Storage box; 12. Positioning rod; 13. Driving rod; 14. Synchronous belt; 15. Positioning plate; 16. Piston air cylinder; 17. Pressing plate; 18. Guide sleeve frame; 19. Driving motor; 20. Turntable; 21. Connecting rod; 22. Pull plate; 23. Pull rod; 24. Exhaust hopper; 25. Breathable filter bag; 26. Discharge pipe; 27. Driven rod; 28. Gear disk; 29. First gear; 30. Driven disk; 31. Rack; 32. Second gear; 33. Insertion block; 34. Slide block; 35. Positioning spring; 36. Support sleeve plate; 37. Support bottom plate; 38. Sealing plate. Detailed implementation manners

[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 embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of 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] Embodiment 1: Please refer to Figures 1 - 8, A plate heat exchanger shown in the figure includes a heat exchanger body 1 and a mounting frame 2 fixedly installed outside the heat exchanger body 1. A plurality of strip-shaped holes are provided on the outside of the mounting frame 2, so that the mounting frame 2 can be fixed to the outside of the heat exchanger body 1 by bolts. A hot medium inlet pipe 3 and a refrigerant inlet pipe 4 are fixedly installed on the outside of the heat exchanger body 1. The hot medium inlet pipe 3 is used to inject a gas with a higher temperature. The cold air entering through the refrigerant inlet pipe 4 then undergoes heat exchange through the heat exchanger body 1. The hot medium inlet pipe 3 is located above the refrigerant inlet pipe 4. Filter nets 5 are provided at the ends of the hot medium inlet pipe 3 and the refrigerant inlet pipe 4 away from the heat exchanger body 1. The impurities in the gas are filtered through the filter nets 5 to solve the problem of impurity accumulation inside the heat exchanger body 1 and ensure continuous heat exchange of the gas. It further includes: a cleaning mechanism for cleaning the impurities on the surface of the filter nets 5, and the cleaning mechanism is installed outside the filter nets 5;

[0035] The cleaning mechanism includes a mounting plate 6 fixedly installed on the outside of the mounting frame 2. The mounting frame 2 is in a U-shaped structure, which is convenient for the installation of the mounting plate 6. Two symmetrically distributed circular boxes 7 are fixedly installed on the inner side of the mounting plate 6. The filter net 5 is fixedly installed on the outside of the circular box 7. A mounting disk 8 is rotatably installed inside the circular box 7. Four air inlets corresponding to the size of the filter net 5 are provided on the surface of the mounting disk 8, so that the gas can enter the hot medium inlet pipe 3 or the refrigerant inlet pipe 4 through the air inlets on the surface of the mounting disk 8 corresponding to the position of the filter net 5. An air inlet cylinder 9 is fixedly installed inside the air inlet. The inner side of the air inlet cylinder 9 is in a ring-shaped inclined surface structure. When the mounting disk 8 rotates, the impurities on the surface of the filter net 5 can be scraped out through the air inlet cylinder 9. The design of the ring-shaped inclined surface inside the air inlet cylinder 9 improves the cleaning efficiency of the impurities. The outside of the filter net 5 is made of rubber material to improve the sealing performance between the filter net 5 and the mounting disk 8. The size of the air inlet cylinder 9 corresponds to the size of the filter net 5, which is convenient for the air inlet cylinder 9 to scrape out the impurities on the surface of the filter net 5 comprehensively and provide guidance for the gas. An air inlet connecting pipe 10 is fixedly installed on the outside of the circular box 7. The air inlet connecting pipe 10 and the adjacent filter net 5 are on the same horizontal line. The inner diameter of the air inlet connecting pipe 10 is the same as the inner diameter of the air inlet cylinder 9, so that the pipeline for transporting the gas is connected to the circular box 7 through the air inlet connecting pipe 10. A positioning rod 12 is fixedly installed on the outside of the mounting disk 8. A driving rod 13 is rotatably installed on the side of the mounting plate 6 close to the mounting frame 2. A synchronous belt 14 is rotatably installed between the driving rod 13 and the two positioning rods 12, so that the driving rod 13 can drive the two positioning rods 12 to rotate synchronously through the synchronous belt 14, and the positioning rod 12 can drive the mounting disk 8 to rotate, which is convenient for the four air inlet cylinders 9 to scrape out the impurities on the surface of the filter net 5.

[0036] Example 2: Please refer to Figures 1 - 6, this embodiment further illustrates Embodiment 1. The material receiving mechanism in the figure includes a positioning plate 15 fixedly installed at the top of the mounting frame 2. Support bottom plates 37 are fixedly installed at the tops of both the mounting frame 2 and the mounting plate 6. The top of the support bottom plate 37 is fixedly connected to the bottom of the positioning plate 15, enabling the two support bottom plates 37 to support the bottom of the positioning plate 15 and improving the stability of the positioning plate 15. A piston air cylinder 16 is fixedly installed at the top of the positioning plate 15. Above the piston air cylinder 16 is provided a pressing plate 17. The bottom of the pressing plate 17 is fixedly connected to the piston rod of the piston air cylinder 16. When the pressing plate 17 moves, it can cause the piston air cylinder 16 to discharge air. A driving motor 19 is fixedly installed on the outside of the mounting plate 6. The driving motor 19 is located on the side of the mounting plate 6 away from the mounting frame 2. The output end of the driving motor 19 is fixedly installed with a turntable 20. The turntable 20 is located between the mounting frame 2 and the mounting plate 6. A connecting rod 21 is hingedly assembled on the outside of the turntable 20. The hinged point of the connecting rod 21 and the turntable 20 is far from the center of the turntable 20. When the driving motor 19 drives the turntable 20 to rotate, it can drive the connecting rod 21 to perform a circular motion around the center of the turntable 20. One end of the connecting rod 21 away from the turntable 20 is hingedly assembled with a pulling plate 22. Two symmetrically distributed pull rods 23 are fixedly installed between the two ends of the pulling plate 22 and the two ends of the pressing plate 17. Support sleeve plates 36 are fixedly installed on both sides of the positioning plate 15. The pull rods 23 are slidably installed inside the support sleeve plates 36. When the connecting rod 21 rotates, it drives the pull rods 23 to perform reciprocating up and down movements along the inside of the support sleeve plates 36 through the pulling plate 22, causing the pull rods 23 to drive the pressing plate 17 to move synchronously. The pressing plate 17 can then repeatedly press the piston air cylinder 16. A slag removal port is opened on the outside of the circular box 7. An exhaust hopper 24 is fixedly installed outside the slag removal port. Air enters through the one-way intake valve on the piston air cylinder 16. The exhaust hopper 24 is connected to the positioning plate 15 and the piston air cylinder 16 through a trachea, enabling the piston air cylinder 16 to input air into the exhaust hopper 24. The exhaust hopper 24 can blow impurities in the intake cylinder 9 through the slag removal port. A discharge pipe 26 is fixedly installed on the side of the circular box 7 away from the exhaust hopper 24. The discharge pipe 26 is of an inclined surface structure, enabling impurities in the intake cylinder 9 to enter the discharge pipe 26 through the blowing of the exhaust hopper 24. A sealing plate 38 is fixedly installed at one end of the exhaust hopper 24 close to the circular box 7. A plurality of exhaust holes are arranged in a centrally symmetric distribution on the surface of the sealing plate 38. Air is sprayed towards the inside of the intake cylinder 9 through the exhaust holes to provide guidance for the air. A storage box 11 is fixedly installed between the two discharge pipes 26. The storage box 11 is fixedly installed on the outside of the mounting frame 2. A breathable filter bag 25 is fixedly installed at the bottom of the storage box 11, enabling the air in the storage box 11 to be discharged from the breathable filter bag 25, and the breathable filter bag 25 cooperates with the storage box 11 to collect impurities.

[0037] Embodiment 3: Please refer to Figures 5 - 8, this embodiment further elaborates on other embodiments. The fixed pipe mechanism in the figure includes a driven rod 27 rotatably installed on the side of the mounting plate 6 close to the drive rod 13. A toothed disc 28 is fixedly installed on the outer side of the driven rod 27. The output end of the drive motor 19 is fixedly installed with a first gear 29 that cooperates with the toothed disc 28. When the output end of the drive motor 19 rotates, it can drive the toothed disc 28 to rotate through the first gear 29. The toothed disc 28 can then drive the driven rod 27 to rotate. A driven disc 30 is fixedly installed on the outer side of the driven rod 27, and the driven rod 27 can drive the driven disc 30 to rotate synchronously. Two racks 31 distributed symmetrically about the center are fixedly installed on the outer side of the driven disc 30. A second gear 32 that cooperates with the racks 31 is fixedly installed on the outer side of the drive rod 13, and the racks 31 can cause the second gear 32 to rotate 90 degrees. When the racks 31 come into contact with the second gear 32, they can drive the second gear 32 to rotate 90 degrees. Thus, the second gear 32 drives the drive rod 13 to rotate synchronously, causing the drive rod 13 to rotate synchronously through the synchronous belt 14, so that the four air intake cylinders 9 on the mounting disc 8 are replaced in position. Two symmetrically distributed insertion blocks 33 are slidably installed inside the mounting plate 6. As the driven disc 30 rotates, intermittent rotation of the mounting disc 8 is achieved, and the four air intake cylinders 9 can continuously clean the impurities on the surface of the filter net 5. One end of the insertion block 33 close to the mounting disc 8 is an arc-shaped structure. Four slots for the insertion blocks 33 to be limited and inserted are opened on the outer side of the mounting disc 8. An opening for the insertion blocks 33 to be limited and slid is opened on the outer side of the circular box 7. When the mounting disc 8 rotates, it can push the arc surface of the insertion block 33 through the slot, causing the insertion block 33 to move. A slider 34 is fixedly installed on the outer side of the insertion block 33. The slider 34 is slidably installed on the outer side of the mounting plate 6. A long slot for the slider 34 to move is opened on the outer side of the mounting plate 6. A positioning spring 35 is fixedly installed between the two sliders 34, facilitating the movement and reset of the slider 34. When the insertion block 33 is inserted into the slot, it provides positioning for the mounting disc 8. A guiding sleeve frame 18 is fixedly installed on the side of the mounting plate 6 close to the slider 34. The slider 34 is slidably installed on the outer side of the guiding sleeve frame 18, providing guidance for the movement of the slider 34 and ensuring the smoothness of the movement of the slider 34.

[0038] Working principle: First, the staff docks the pipeline for conveying hot air with the intake connection pipe 10 near the heat medium intake pipe 3, and docks the pipeline for conveying cold air with the intake connection pipe 10 near the refrigerant intake pipe 4. The hot air and cold air enter the mounting plate 8 through the intake connection pipe 10. Both the hot air and cold air enter the heat medium intake pipe 3 and the refrigerant intake pipe 4 respectively through the intake cylinder 9 aligned with the filter screen 5, enabling the filter screen 5 to filter impurities in the gas. The clean gas can then enter the heat exchanger body 1, causing the heat exchanger body 1 to conduct heat exchange. Then, the staff starts the drive motor 19. The drive motor 19 drives the gear disk 28 to rotate through the first gear 29, causing the gear disk 28 to drive the driven rod 27 to rotate. The driven rod 27 drives the driven disk 30 to rotate synchronously. When the rack 31 on the driven disk 30 contacts the second gear 32, as the driven disk 30 rotates, the rack 31 can drive the second gear 32 to rotate by 90 degrees. At this time, the second gear 32 drives the drive rod 13 to rotate synchronously, causing the drive rod 13 to drive the two positioning rods 12 to rotate synchronously through the synchronous belt 14. The positioning rods 12 can then drive the mounting plate 8 to rotate by 90 degrees, replacing the positions of the four intake cylinders 9 on the mounting plate 8. And while the intake cylinder 9 moves, the intake cylinder 9 aligned with the filter screen 5 scrapes the impurities on the surface of the filter screen 5, enabling another intake cylinder 9 to align with the filter screen 5, ensuring the normal filtration of the gas by the filter screen 5. Thus, as the driven disk 30 rotates, the rack 31 can drive the second gear 32 to rotate intermittently, and the intake cylinders 9 on the mounting plate 8 can continuously clean the impurities on the surface of the filter screen 5. At the same time, the drive motor 19 drives the turntable 20 to rotate synchronously. The turntable 20 pulls the pull plate 22 to move through the connecting rod 21, causing the pull plate 22 to drive the pull rod 23 to move along the outside of the support sleeve plate 36. The pull rod 23 presses the piston rod on the piston air cylinder 16 through the pressure plate 17. The air in the piston air cylinder 16 enters the exhaust hopper 24 through the air pipe. And as the turntable 20 rotates, the connecting rod 21 can repeatedly pull the pull plate 22 to move up and down, enabling the piston air cylinder 16 to repeatedly inject air into the exhaust hopper 24. And the outside air can enter the piston air cylinder 16 through the one-way intake valve on the piston air cylinder 16. The air in the exhaust hopper 24 can be ejected through the exhaust holes on the sealing plate 38, enabling the ejected air to blow the impurities inside the intake cylinder 9 aligned with the exhaust hopper 24 into the discharge pipe 26. The impurities enter the storage box 11 along the discharge pipe 26, and the excess air can be discharged from the breathable filter bag 25. And as the piston air cylinder 16 continuously supplies air, the impurities in the intake cylinder 9 can be comprehensively cleaned. Thus, as the drive motor 19 operates, the four intake cylinders 9 can continuously clean the impurities on the filter screen 5 and collect them centrally, ensuring the normal operation of the heat exchanger body 1, solving the problem of impurity accumulation and blockage inside the heat exchanger body 1, thereby achieving the effect of continuous cleaning, ensuring continuous heat exchange of the gas, improving the convenience of later maintenance of the heat exchanger body 1, and further enhancing the durability of the heat exchanger body 1.

[0039] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0040] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plate heat exchanger, characterized in that: include: The heat exchanger body and the mounting frame fixedly mounted on the outside of the heat exchanger body, the heat medium inlet pipe and the refrigerant inlet pipe are fixedly mounted on the outside of the heat exchanger body, and the ends of the heat medium inlet pipe and the refrigerant inlet pipe away from the heat exchanger body are both provided with filter screens; Also includes: A cleaning mechanism is used to clean impurities on the surface of the filter screen. The cleaning mechanism is installed on the outside of the filter screen. The cleaning mechanism includes a mounting plate installed on the outside of the mounting frame. Two circular boxes are fixedly installed on the inner side of the mounting plate. A mounting disk is rotatably installed on the inner side of the circular box. Four air inlets corresponding to the size of the filter screen are opened on the surface of the mounting disk. An air inlet cylinder is fixedly installed on the inner side of the air inlet. An air inlet pipe is installed on the outer side of the circular box. A positioning rod is fixedly installed on the outer side of the mounting disk. A driving rod is installed on the outer side of the mounting plate. A synchronous belt is rotatably installed between the driving rod and the two positioning rods. The material receiving mechanism is used for collecting the impurities cleaned from the filter screen in a centralized manner. The material receiving mechanism is installed on the outside of the mounting frame. The material receiving mechanism includes a positioning plate installed on the top of the mounting frame. A piston cylinder is installed on the top of the positioning plate. A pressure plate is arranged above the piston cylinder. A driving motor is installed on the outside of the mounting plate. A turntable is installed on the output end of the driving motor. A connecting rod is hingedly installed on the outside of the turntable. A pull plate is hingedly installed on one end of the connecting rod. Two pull rods are fixedly installed between the two ends of the pull plate and the two ends of the pressure plate. An exhaust bucket is installed on the outside of the circular box. A discharge pipe is fixedly installed on the outside of the circular box. The fixed pipe mechanism is used for intermittent and continuous cleaning of the filter screen. The fixed pipe mechanism is installed on the outside of the mounting frame. The fixed pipe mechanism includes a driven rod installed on the outside of the mounting plate. A gear disk is fixedly installed on the outside of the driven rod. A first gear is fixedly installed on the output end of the drive motor. A driven disk is fixedly installed on the outside of the driven rod. Two racks are fixedly installed on the outside of the driven disk. A second gear is fixedly installed on the outside of the drive rod. Two plug-in blocks are slidably installed on the inner side of the mounting plate. Four slots are opened on the outside of the mounting disk. A slider is installed on the outside of the plug-in block, and a positioning spring is installed between the two sliders.

2. A plate heat exchanger according to claim 1, characterized in that: The inner side of the air inlet cylinder is a ring-shaped inclined surface structure, and the outer side of the filter screen is made of rubber material.

3. A plate heat exchanger according to claim 1, characterized in that: Support sleeves are fixedly installed on both sides of the positioning plate, and the pull rod is slidably installed on the inner side of the support sleeve.

4. A plate heat exchanger according to claim 1, characterized in that: A supporting bottom plate is fixedly mounted on the top of the mounting frame and the mounting plate.

5. The plate heat exchanger according to claim 1, characterized in that: A sealing plate is fixedly mounted on one end of the exhaust hopper, and a plurality of exhaust holes are opened on the surface of the sealing plate.

6. A plate heat exchanger according to claim 1, characterized in that: A storage box is installed between the two discharge pipes, and a breathable filter bag is installed at the bottom of the storage box.

7. A plate heat exchanger according to claim 1, characterized in that: A guide sleeve frame is fixedly mounted on the outer side of the mounting plate, and a sliding block is mounted on the outer side of the guide sleeve frame.

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