Plate heat exchanger with circulating cleaning function and working method thereof

Abstract

This invention relates to the field of heat exchanger technology, specifically to a plate heat exchanger with a circulating cleaning function and its operating method. The plate heat exchanger with the circulating cleaning function includes a base and a heat exchanger body mounted on the base, and further includes: a lifting plate, movably disposed on one side of the heat exchanger body and connected to a lifting drive mechanism mounted on the base, the lifting drive mechanism being connected to a Maltese cross mechanism mounted on the base; and a transverse plate, movably disposed on the side of the lifting plate facing the heat exchanger body and connected to a reciprocating transverse mechanism mounted on the lifting plate, the reciprocating transverse mechanism being connected to the Maltese cross mechanism via a transmission mechanism. In actual use, this heat exchanger can effectively ensure heat exchange performance and eliminates the need for manual periodic disassembly and plate-by-plate cleaning, greatly reducing the burden on workers and making it suitable for widespread use.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, specifically a plate heat exchanger with a circulating cleaning function and its working method. Background Technology

[0002] A plate heat exchanger is a high-efficiency heat exchanger composed of a series of corrugated metal plates stacked together. Thin rectangular channels are formed between the plates, through which heat exchange occurs. Plate heat exchangers are ideal for liquid-liquid and liquid-vapor heat exchange. They feature high heat exchange efficiency, low heat loss, compact and lightweight structure, small footprint, wide application, and long service life. Under the same pressure loss conditions, their heat transfer coefficient is 3-5 times higher than that of a tubular heat exchanger, their footprint is one-third that of a tubular heat exchanger, and their heat recovery rate can reach over 90%.

[0003] The flow channel spacing of this type of heat exchanger is relatively large, and the medium in the flow channel often contains fibrous impurities, sludge or solid particles. As the heat exchanger operates for a longer period of time, impurities will scale or accumulate and block the flow channel, increasing the thermal resistance of the plates, reducing the heat exchange effect, or even blocking the flow channel, making it impossible to achieve heat exchange between hot and cold fluids. In this case, the plate heat exchanger needs to be disassembled and cleaned in plates periodically.

[0004] Currently, when most plate heat exchangers need cleaning, workers usually disassemble the heat exchanger and then rinse the disassembled parts. This cleaning method greatly increases the workload of the workers and also leads to low work efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a plate heat exchanger with a circulating cleaning function and its operating method, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A plate heat exchanger with a circulating cleaning function includes a base and a heat exchanger body mounted on the base, and further includes:

[0008] A lifting plate is movably disposed on one side of the heat exchanger body and connected to a lifting drive mechanism mounted on the base. The lifting drive mechanism is connected to a Maltese cross mechanism mounted on the base.

[0009] A transverse plate is movably disposed on the side of the lifting plate facing the heat exchanger body and is connected to a reciprocating transverse mechanism mounted on the lifting plate. The reciprocating transverse mechanism is connected to the Maltese cross mechanism via a transmission mechanism.

[0010] The nozzle is movably mounted on the transverse plate via an elastic driven mechanism and connected to an external pumping mechanism. The Maltese cross mechanism can drive the lifting drive mechanism and the transmission mechanism to move alternately, so that the lifting drive mechanism drives the lifting plate to rise or fall, changing the height of the nozzle. The reciprocating transverse mechanism can drive the transverse plate to move along the length direction of the lifting plate, changing the horizontal position of the nozzle. The elastic driven mechanism is triggered during the movement of the transverse plate along the length direction of the lifting plate, causing the nozzle to perform a swinging motion.

[0011] As a further aspect of the present invention: the Maltese cross movement mechanism includes a drive motor mounted on the base, a drive wheel fixed on the output shaft of the drive motor, and a first driven wheel and a second driven wheel rotatably mounted on the base. The rotation shaft of the first driven wheel is connected to the lifting drive mechanism, and the rotation shaft of the second driven wheel is connected to the transmission mechanism.

[0012] As a further embodiment of the present invention: the lifting drive mechanism includes a threaded rod rotatably mounted on the base and a threaded sleeve fixed to the side of the lifting plate away from the heat exchanger body. The threaded rod passes through the threaded sleeve and is threadedly connected to it, and the threaded rod is connected to the rotating shaft of the first driven wheel through a first transmission belt.

[0013] As a further embodiment of the present invention: the reciprocating transverse movement mechanism includes a movable rod disposed on a column on the side of the lifting plate facing the heat exchanger body, and the column is connected to a rolling engagement assembly mounted on the lifting plate;

[0014] The rolling engagement assembly is connected to the transmission mechanism. Two guide rods are fixedly installed on the side of the lifting plate facing the heat exchanger body. The transverse plate is slidably disposed on the two guide rods. The transverse plate is also provided with two limiting protrusions, and a gap is reserved between the two limiting protrusions. The column extends into the gap and is slidably connected to the two limiting protrusions.

[0015] As a further embodiment of the present invention: the rolling engagement assembly includes two drive wheels rotatably mounted on the lifting plate and a connector connecting the two drive wheels, the connector rollingly engaging with the two drive wheels, and the column being disposed on the connector.

[0016] As a further embodiment of the present invention: the transmission mechanism includes a rotating shaft rotatably mounted on the base and a sleeve rotatably mounted on the lifting plate. The sleeve is slidably fitted with the rotating shaft through a sliding limiting structure, and the rotating shaft is connected to the rotating shaft of the second driven wheel through a second transmission belt. The sleeve is connected to the rotating shaft of one of the driving wheels through a third transmission belt and a bevel gear set.

[0017] As a further embodiment of the present invention: the sliding limiting structure includes two strip-shaped protrusions on the outer wall of the rotating shaft and two strip-shaped grooves on the inner wall of the sleeve, the strip-shaped grooves and the strip-shaped protrusions are adapted to each other, and both coincide with the central axis of the rotating shaft.

[0018] As a further embodiment of the present invention: the elastic driven mechanism includes a swing plate rotatably mounted on the transverse plate and a transmission column movably disposed on one side of the swing plate, the nozzle is fixed on the swing plate, and the transmission column is connected to an elastic sliding member disposed on the transverse plate;

[0019] The swing plate has a groove on the side facing the transmission column, and the transmission column extends into the groove and is slidably connected to the swing plate.

[0020] As a further embodiment of the present invention: the elastic sliding member includes two columns fixed to the transverse plate by two protrusions, a driven plate slidably disposed on the two columns and fixed to the transmission column, and two cylindrical springs respectively sleeved on the outer periphery of the two columns.

[0021] The cylindrical spring is connected to the protruding block and the driven plate at both ends, and a roller is also installed on the driven plate. The roller abuts against the limiting plate fixedly installed on the lifting plate, and the limiting plate is provided with multiple recesses at equal intervals along the length direction.

[0022] A method for operating the plate heat exchanger with circulating cleaning function includes the following steps:

[0023] Step one: The Maltese cross mechanism operates, driving the transmission mechanism and the lifting drive mechanism to move;

[0024] Step two, the transmission mechanism moves, driving the reciprocating transverse mechanism to move. The reciprocating transverse mechanism drives the transverse plate to move the nozzle along the length direction of the lifting plate, and triggers the elastic driven mechanism, which drives the nozzle to reciprocate.

[0025] Step 3: The lifting drive mechanism moves, causing the lifting plate to rise or fall a certain distance, so that the lifting plate drives the nozzle to change height.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention has a novel design. During operation, the Maltese cross mechanism works, alternately driving the transmission mechanism and the lifting drive mechanism. When the transmission mechanism moves, it drives the reciprocating lateral movement mechanism, which in turn drives the lateral plate to move the nozzle along the length of the lifting plate, thereby increasing the range of the cleaning agent sprayed by the nozzle and ensuring the comprehensive cleaning of the heat exchanger body. At the same time, the elastic driven mechanism is triggered, causing the nozzle to perform a swinging motion. Therefore, the angle of the cleaning agent sprayed by the nozzle will continuously change, thereby ensuring the thorough removal of impurities and greatly improving the cleaning effect. When the lifting drive mechanism moves, it will drive the lifting plate to rise or fall a certain distance to change the height of the cleaning agent sprayed by the nozzle. This cycle repeats, realizing the effective automatic cyclic cleaning function of the heat exchanger. In actual use, it can effectively guarantee the heat exchange effect and eliminates the need for manual periodic disassembly and sheet cleaning of the heat exchanger, greatly reducing the burden on workers and making it suitable for widespread use. Attached Figure Description

[0027] Figure 1 A schematic diagram of one embodiment of a plate heat exchanger with circulating cleaning function;

[0028] Figure 2 A schematic diagram of another aspect of an embodiment of a plate heat exchanger with circulating cleaning function;

[0029] Figure 3 A schematic diagram of the structure of a plate heat exchanger with circulating cleaning function from another angle;

[0030] Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle;

[0031] Figure 5 for Figure 3 Enlarged view of the structure at point B;

[0032] Figure 6 A schematic diagram of the Maltese cross mechanism in one embodiment of a plate heat exchanger with circulating cleaning function;

[0033] Figure 7 A schematic diagram of the reciprocating transverse movement mechanism in one embodiment of a plate heat exchanger with circulating cleaning function;

[0034] Figure 8 A schematic diagram of the elastic driven mechanism in one embodiment of a plate heat exchanger with circulating cleaning function;

[0035] In the diagram: 1. Base; 2. Heat exchanger body; 3. Lifting plate; 4. Horizontal plate; 401. Limiting protrusion; 5. Nozzle; 6. Swing plate; 601. Slide groove; 7. Protrusion block; 8. Column; 9. Driven plate; 901. Transmission column; 10. Cylindrical spring; 11. Roller; 12. Limiting plate; 1201. Recess; 13. Drive motor; 14. First driven wheel; 15. Second driven wheel; 16. First transmission belt; 17. Second transmission belt; 18. Drive wheel; 19. Threaded rod; 20. Threaded sleeve; 21. Rotating shaft; 2101. Strip protrusion; 22. Sleeve; 2201. Strip groove; 23. Third transmission belt; 24. Bevel gear set; 25. Drive wheel; 26. Connector; 27. Column; 28. Guide rod. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0038] Please see Figures 1-8 In this embodiment of the invention, a plate heat exchanger with a circulating cleaning function includes a base 1 and a heat exchanger body 2 mounted on the base 1, and further includes:

[0039] The lifting plate 3 is movably disposed on one side of the heat exchanger body 2 and connected to the lifting drive mechanism installed on the base 1. The lifting drive mechanism is connected to the Maltese cross mechanism installed on the base 1.

[0040] A transverse plate 4 is movably disposed on the side of the lifting plate 3 facing the heat exchanger body 2, and is connected to a reciprocating transverse mechanism mounted on the lifting plate 3. The reciprocating transverse mechanism is connected to the Maltese cross mechanism through a transmission mechanism.

[0041] The nozzle 5 is movably mounted on the transverse plate 4 via an elastic driven mechanism and is connected to an external pumping mechanism. The Maltese cross mechanism can drive the lifting drive mechanism and the transmission mechanism to move alternately, so that the lifting drive mechanism drives the lifting plate 3 to rise or fall, changing the height of the nozzle 5. The reciprocating transverse mechanism can drive the transverse plate 4 to move along the length direction of the lifting plate 3, so that the horizontal position of the nozzle 5 changes. The elastic driven mechanism is triggered during the movement of the transverse plate 4 along the length direction of the lifting plate 3, causing the nozzle 5 to perform a swinging action.

[0042] It should be noted that the pump mechanism includes an external liquid pump. The inlet of the liquid pump is connected to the cleaning agent storage tank, and the outlet is connected to the nozzle 5. During operation, the liquid pump operates to spray cleaning agent onto the heat exchanger body 2 through the nozzle 5 to achieve a cleaning effect.

[0043] During operation, the Maltese cross mechanism works, alternately driving the transmission mechanism and the lifting drive mechanism. When the transmission mechanism moves, it drives the reciprocating lateral movement mechanism, which in turn drives the lateral plate 4 to move the nozzle 5 along the length of the lifting plate 3, thereby increasing the range of the cleaning agent sprayed by the nozzle 5 and ensuring the comprehensive cleaning of the heat exchanger body 2. At the same time, the elastic driven mechanism is triggered, causing the nozzle 5 to perform a swinging motion. Therefore, the angle at which the nozzle 5 sprays the cleaning agent will continuously change, thereby ensuring the thorough removal of impurities and greatly improving the cleaning effect.

[0044] When the lifting drive mechanism moves, it will drive the lifting plate 3 to rise or fall a certain distance to change the height at which the nozzle 5 sprays the cleaning agent.

[0045] This cycle repeats continuously, achieving an effective automatic cleaning function for the heat exchanger. In actual use, it can effectively ensure the heat exchange effect and eliminates the need for manual disassembly and cleaning of the heat exchanger periodically, greatly reducing the burden on staff and making it suitable for widespread use.

[0046] Please refer to it again. Figure 4 and Figure 6 The Maltese cross movement mechanism includes a drive motor 13 mounted on the base 1, a drive wheel 18 fixed on the output shaft of the drive motor 13, and a first driven wheel 14 and a second driven wheel 15 rotatably mounted on the base 1. The rotation shaft of the first driven wheel 14 is connected to the lifting drive mechanism, and the rotation shaft of the second driven wheel 15 is connected to the transmission mechanism.

[0047] The lifting drive mechanism includes a threaded rod 19 rotatably mounted on the base 1 and a threaded sleeve 20 fixed to the side of the lifting plate 3 away from the heat exchanger body 2. The threaded rod 19 passes through the threaded sleeve 20 and is threadedly connected to it. The threaded rod 19 is connected to the rotating shaft of the first driven wheel 14 through the first transmission belt 16.

[0048] During the cleaning process, the drive motor 13 works, which causes the drive wheel 18 to drive the first driven wheel 14 and the second driven wheel 15 to rotate in sequence. When the first driven wheel 14 rotates, its rotating shaft will drive the threaded rod 19 to rotate through the first transmission belt 16. Then, the threaded sleeve 20 will engage with the threaded rod 19 to drive the lifting plate 3 to rise or fall, changing the height of the spray nozzle 5 spraying the cleaning agent.

[0049] It should be emphasized that, in order to ensure that the cleaning can be carried out in an up-and-down cycle, the drive motor 13 is selected as a servo motor with bidirectional drive at the output end. This application does not make specific limitations on its specific model, and it can be selected according to actual needs.

[0050] Please refer to it again. Figure 6 and Figure 7 The reciprocating lateral movement mechanism includes a movable rod on a column 27 located on the side of the lifting plate 3 facing the heat exchanger body 2, and the column 27 is connected to a rolling engagement assembly mounted on the lifting plate 3.

[0051] The rolling engagement assembly is connected to the transmission mechanism. Two guide rods 28 are fixedly installed on the side of the lifting plate 3 facing the heat exchanger body 2. The transverse plate 4 is slidably disposed on the two guide rods 28. The transverse plate 4 is also provided with two limiting protrusions 401, and a gap is reserved between the two limiting protrusions 401. The column 27 extends into the gap and is slidably connected to the two limiting protrusions 401.

[0052] The rolling engagement assembly includes two drive wheels 25 rotatably mounted on the lifting plate 3 and a connector 26 connecting the two drive wheels 25. The connector 26 rolls with the two drive wheels 25, and the column 27 is disposed on the connector 26.

[0053] The transmission mechanism includes a rotating shaft 21 rotatably mounted on the base 1 and a sleeve 22 rotatably mounted on the lifting plate 3. The sleeve 22 is slidably fitted with the rotating shaft 21 through a sliding limiting structure. The rotating shaft 21 is connected to the rotating shaft of the second driven wheel 15 through a second transmission belt 17. The sleeve 22 is connected to the rotating shaft of one of the driving wheels 25 through a third transmission belt 23 and a bevel gear set 24.

[0054] In detail, the bevel gear set 24 includes a first bevel gear rotatably mounted on the lifting plate 3 and a second bevel gear fixedly mounted coaxially with one of the drive wheels 25, and the second bevel gear meshes with the first bevel gear. The third transmission belt 23 is used to connect the rotating shaft of the first bevel gear to the sleeve 22.

[0055] The sliding limiting structure includes two strip-shaped protrusions 2101 on the outer wall of the rotating shaft 21 and two strip-shaped grooves 2201 on the inner wall of the sleeve 22. The strip-shaped grooves 2201 are adapted to the strip-shaped protrusions 2101, and both coincide with the central axis of the rotating shaft 21.

[0056] When the threaded rod 19 rotates, the sleeve 22 slides and engages with the rotating shaft 21, thus guiding the threaded sleeve 20 and allowing the threaded sleeve 20 to smoothly engage with the threaded rod 19. Correspondingly, when the lifting plate 3 is raised and lowered, the sleeve 22 slides up and down on the rotating shaft 21.

[0057] When the shaft 21 rotates, it will drive the sleeve 22 to rotate through the strip protrusion 2101 and the strip groove 2201. Then, the sleeve 22 can drive the drive wheel 25 to rotate through the third transmission belt 23 and the bevel gear set 24. Correspondingly, the connector 26 will drive the column 27 to move. The movement trajectory of the column 27 is consistent with the shape of the connector 26 (i.e., a closed trajectory formed by two opposite semi-circular segments and two opposite straight segments). The column 27 can slide with the two limiting protrusions 401 and drive the transverse plate 4 to slide back and forth on the two guide rods 28 through the limiting protrusions 401. Therefore, the position of the nozzle 5 spraying cleaning agent is changed, ensuring the comprehensiveness of cleaning the heat exchanger.

[0058] Please refer to it again. Figure 5 and Figure 8 The elastic driven mechanism includes a swing plate 6 rotatably mounted on the transverse plate 4 and a transmission column 901 movably disposed on one side of the swing plate 6. The nozzle 5 is fixed on the swing plate 6, and the transmission column 901 is connected to an elastic sliding member disposed on the transverse plate 4.

[0059] The swing plate 6 is provided with a groove 601 on the side facing the transmission column 901, and the transmission column 901 extends into the groove 601 and is slidably connected to the swing plate 6.

[0060] The elastic sliding member includes two columns 8 fixed to the transverse plate 4 by two protrusions 7, a driven plate 9 slidably disposed on the two columns 8 and fixed to the transmission column 901, and two columnar springs 10 respectively sleeved on the outer periphery of the two columns 8.

[0061] The cylindrical spring 10 is connected to the protruding block 7 and the driven plate 9 at its two ends respectively. The driven plate 9 is also equipped with a roller 11. The roller 11 abuts against the limiting plate 12 fixedly installed on the lifting plate 3. The limiting plate 12 is provided with a plurality of recesses 1201 at equal intervals along the length direction.

[0062] When the transverse plate 4 moves along the length of the lifting plate 3, when the roller 11 rolls to the recess 1201, the cylindrical spring 10 rebounds, causing the driven plate 9 to drive the transmission column 901 to rise. When the roller 11 rolls out of the recess 1201, the driven plate 9 drives the transmission column 901 to fall, and the cylindrical spring 10 is compressed again. This cycle causes the transmission column 901 to move up and down repeatedly as the transverse plate 4 moves along the length of the lifting plate 3. The transmission column 901 slides with the swing plate 6 through the slide groove 601, causing the swing plate 6 to swing back and forth in the vertical direction. This allows the nozzle 5 to spray cleaning agent onto the heat exchanger body 2 from different angles, thereby ensuring the thorough removal of impurities and greatly improving the cleaning effect.

[0063] As another embodiment of the present invention, a method for operating the plate heat exchanger with circulating cleaning function is also proposed, comprising the following steps:

[0064] Step one: The Maltese cross mechanism operates, driving the transmission mechanism and the lifting drive mechanism to move;

[0065] Step 2: The transmission mechanism moves, driving the reciprocating transverse mechanism to move. The reciprocating transverse mechanism drives the transverse plate 4 to move the nozzle 5 along the length direction of the lifting plate 3, and triggers the elastic driven mechanism. The elastic driven mechanism drives the nozzle 5 to reciprocate.

[0066] Step 3: The lifting drive mechanism moves, causing the lifting plate 3 to rise or fall a certain distance, so that the lifting plate 3 drives the nozzle 5 to change height.

[0067] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0068] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A plate heat exchanger with a circulating cleaning function, comprising a base (1) and a heat exchanger body (2) mounted on the base (1), characterized in that, Also includes: The lifting plate (3) is movably disposed on one side of the heat exchanger body (2) and connected to the lifting drive mechanism installed on the base (1). The lifting drive mechanism is connected to the Maltese cross mechanism installed on the base (1). A transverse plate (4) is movably disposed on the side of the lifting plate (3) facing the heat exchanger body (2) and is connected to a reciprocating transverse mechanism mounted on the lifting plate (3), and the reciprocating transverse mechanism is connected to the Maltese cross mechanism through a transmission mechanism. The nozzle (5) is movably mounted on the transverse plate (4) via an elastic driven mechanism and connected to an external pump mechanism. The Maltese cross mechanism can drive the lifting drive mechanism and the transmission mechanism to move alternately, so that the lifting drive mechanism drives the lifting plate (3) to rise or fall, and the height of the nozzle (5) changes. The reciprocating transverse mechanism can drive the transverse plate (4) to move along the length direction of the lifting plate (3), so that the horizontal position of the nozzle (5) changes. The elastic driven mechanism is triggered during the movement of the transverse plate (4) along the length direction of the lifting plate (3), and causes the nozzle (5) to perform a swinging action. The Maltese cross movement mechanism includes a drive motor (13) mounted on the base (1), a drive wheel (18) fixed on the output shaft of the drive motor (13), and a first driven wheel (14) and a second driven wheel (15) rotatably mounted on the base (1). The rotation shaft of the first driven wheel (14) is connected to the lifting drive mechanism, and the rotation shaft of the second driven wheel (15) is connected to the transmission mechanism.

2. A plate heat exchanger with circulating cleaning function according to claim 1, characterized in that, The lifting drive mechanism includes a threaded rod (19) rotatably mounted on the base (1) and a threaded sleeve (20) fixed to the side of the lifting plate (3) away from the heat exchanger body (2). The threaded rod (19) passes through the threaded sleeve (20) and is threadedly connected to it. The threaded rod (19) is connected to the rotating shaft of the first driven wheel (14) through the first transmission belt (16).

3. A plate heat exchanger with circulating cleaning function according to claim 1, characterized in that, The reciprocating lateral movement mechanism includes a column (27) with a movable rod on the side of the lifting plate (3) facing the heat exchanger body (2), and the column (27) is connected to a rolling engagement assembly installed on the lifting plate (3). The rolling fit assembly is connected to the transmission mechanism. Two guide rods (28) are fixedly installed on the side of the lifting plate (3) facing the heat exchanger body (2). The transverse plate (4) is slidably disposed on the two guide rods (28). The transverse plate (4) is also provided with two limiting protrusions (401), and a gap is reserved between the two limiting protrusions (401). The column (27) extends into the gap and is slidably connected to the two limiting protrusions (401).

4. A plate heat exchanger with circulating cleaning function according to claim 3, characterized in that, The rolling engagement assembly includes two drive wheels (25) rotatably mounted on the lifting plate (3) and a connector (26) connecting the two drive wheels (25). The connector (26) rolls with the two drive wheels (25), and the column (27) is disposed on the connector (26).

5. A plate heat exchanger with circulating cleaning function according to claim 4, characterized in that, The transmission mechanism includes a rotating shaft (21) rotatably mounted on the base (1) and a sleeve (22) rotatably mounted on the lifting plate (3). The sleeve (22) is slidably fitted with the rotating shaft (21) through a sliding limiting structure. The rotating shaft (21) is connected to the rotating shaft of the second driven wheel (15) through a second transmission belt (17). The sleeve (22) is connected to the rotating shaft of one of the driving wheels (25) through a third transmission belt (23) and a bevel gear set (24).

6. A plate heat exchanger with circulating cleaning function according to claim 5, characterized in that, The sliding limiting structure includes two strip-shaped protrusions (2101) on the outer wall of the rotating shaft (21) and two strip-shaped grooves (2201) on the inner wall of the sleeve (22). The strip-shaped grooves (2201) are adapted to the strip-shaped protrusions (2101), and both coincide with the central axis of the rotating shaft (21).

7. A plate heat exchanger with circulating cleaning function according to claim 1, characterized in that, The elastic driven mechanism includes a swing plate (6) rotatably mounted on the transverse plate (4) and a transmission column (901) movably disposed on one side of the swing plate (6). The nozzle (5) is fixed on the swing plate (6), and the transmission column (901) is connected to an elastic sliding member disposed on the transverse plate (4). The swing plate (6) has a groove (601) on the side facing the transmission column (901), and the transmission column (901) extends into the groove (601) and is slidably connected to the swing plate (6).

8. A plate heat exchanger with circulating cleaning function according to claim 7, characterized in that, The elastic sliding member includes two columns (8) fixed to the transverse plate (4) by two protrusions (7), a driven plate (9) slidably disposed on the two columns (8) and fixed to the transmission column (901), and two cylindrical springs (10) respectively sleeved on the outer periphery of the two columns (8). The two ends of the cylindrical spring (10) are respectively connected to the protrusion block (7) and the driven plate (9), and the driven plate (9) is also equipped with a roller (11). The roller (11) abuts against the limiting plate (12) fixedly installed on the lifting plate (3), and the limiting plate (12) is provided with a plurality of recesses (1201) at equal intervals along the length direction.

9. A method for operating a plate heat exchanger with a circulating cleaning function as described in claim 1, characterized in that, Includes the following steps: Step one: The Maltese cross mechanism operates, driving the transmission mechanism and the lifting drive mechanism to move; Step 2, the transmission mechanism moves, driving the reciprocating transverse mechanism to move. The reciprocating transverse mechanism drives the transverse plate (4) to move the nozzle (5) along the length direction of the lifting plate (3), and triggers the elastic driven mechanism. The elastic driven mechanism drives the nozzle (5) to reciprocate. Step 3: The lifting drive mechanism moves, causing the lifting plate (3) to rise or fall a certain distance, so that the lifting plate (3) drives the nozzle (5) to change height.

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