A plate heat exchanger and heat exchange system

Abstract

This invention discloses a plate heat exchanger and heat exchange system, applied in the field of plate heat exchanger technology. It includes a base plate, with a heat exchanger, heat exchange components, and a controller mounted on the top of the base plate. The heat exchanger is positioned on one side of the heat exchange components, which are connected to the heat exchanger for heat exchange with the medium. The heat exchange components include a hot inlet pipe, a hot outlet pipe, a cold inlet pipe, and a cold outlet pipe. The hot inlet pipe and hot outlet pipe are connected to the top of the heat exchanger, and the cold inlet pipe and cold outlet pipe are connected to the bottom of the heat exchanger. A flow assembly is disposed in the middle of the heat exchange components. The flow assembly includes a central ball, a first connecting pipe, and a second connecting pipe. The first connecting pipe connects the hot inlet pipe and the cold inlet pipe, and the second connecting pipe connects the hot outlet pipe and the cold outlet pipe. This invention can promptly alarm when fluid leaks in the heat exchanger and maintain heat exchange efficiency during maintenance.

Description

Technical Field

[0001] This invention relates to the field of plate heat exchanger technology, specifically to a plate heat exchanger and heat exchange system. Background Technology

[0002] Currently, the plate heat exchanger in existing technology is a heat exchange device composed of a series of metal plates with a certain corrugated shape. It has the advantages of high heat transfer efficiency, light weight, small space occupation, compact structure and easy maintenance, and is widely used in industries such as petrochemical, aerospace, and refrigeration and heating.

[0003] When the working fluid of a heat exchanger is in a two-phase state, due to the complexity and uncertainty of two-phase flow, fluid leakage may occur, leading to downtime for maintenance and affecting industrial progress.

[0004] To prevent heat exchanger fluid leakage from affecting heat exchange efficiency and industrial progress, a plate heat exchanger and heat exchange system are provided, which can promptly alarm when heat exchanger fluid leaks and ensure heat exchange efficiency during maintenance. Summary of the Invention

[0005] The purpose of this invention is to provide a plate heat exchanger and heat exchange system to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a plate heat exchanger and a heat exchange system, including a base plate, a heat exchanger, a heat exchange component and a controller are arranged on the top of the base plate, the heat exchanger is arranged on one side of the heat exchange component, and the heat exchange component is connected to the heat exchanger for heat exchange of the medium;

[0007] The heat exchange assembly includes a hot inlet pipe, a hot outlet pipe, a cold inlet pipe, and a cold outlet pipe, wherein:

[0008] The hot inlet pipe and hot outlet pipe are respectively connected to the top of the heat exchanger, and the cold inlet pipe and cold outlet pipe are respectively connected to the bottom of the heat exchanger;

[0009] A flow assembly is provided in the middle of the heat exchange assembly. The flow assembly includes a central ball, a connecting pipe one, and a connecting pipe two. The connecting pipe one is connected between the hot inlet pipe and the cold inlet pipe, and the connecting pipe two is connected between the hot outlet pipe and the cold outlet pipe. A valve three and a valve five are connected to the connecting pipe one, wherein the valve five is located above the valve three. A valve four and a valve six are connected to the connecting pipe two, wherein the valve six is ​​located above the valve four.

[0010] A first motor is fixed to one side of the central ball. The central ball is hollow, and a connecting shaft is connected to the central ball through a central bearing. The output end of the first motor is fixedly connected to the connecting shaft. A connecting ball is fixed to the outside of the connecting shaft. Connecting plates are fixed to both sides of the connecting ball. An arc-shaped baffle is fixed to one side of each set of connecting plates. Two sets of connecting holes one are opened on the arc-shaped baffle near the first connecting pipe, and two sets of connecting holes two are opened on the arc-shaped baffle near the second connecting pipe. The first motor is electrically connected to the controller.

[0011] According to the above technical solution, a central tube is connected between the central ball and the connecting tube one, and a central tube is connected between the central ball and the connecting tube two. A central hole one and a central hole two are respectively provided inside the central tube one, and a central hole three and a central hole four are respectively provided between the central tubes two.

[0012] According to the above technical solution, pressure gauge 1 and valve 1 are connected to both the hot inlet pipe and the hot outlet pipe, and pressure gauge 2 and valve 2 are connected to both the cold inlet pipe and the cold outlet pipe. Both pressure gauge 1 and pressure gauge 2 are electrically connected to the controller.

[0013] According to the above technical solution, a switching valve is connected to the output head of both the hot and cold outlet pipes. A transmission pipe is connected to both the hot and cold outlet pipes. A three-way valve is connected to the transmission pipe. One end of the three-way valve is connected to a storage tank. The switching valve and the three-way valve are electrically connected to the controller.

[0014] According to the above technical solution, the heat exchanger includes several partitions, and a first partition and a second partition are formed between the partitions. The hot inlet pipe, hot outlet pipe, cold inlet pipe and cold outlet pipe all extend into the partitions and penetrate the partitions. The hot inlet pipe and hot outlet pipe both penetrate the first partition, and the cold inlet pipe and cold outlet pipe both penetrate the second partition.

[0015] According to the above technical solution, the pressure gauge one and pressure gauge two are located on the side closer to the heat exchanger, and the flow assembly is located on the side farther away from the heat exchanger.

[0016] The controller includes a time recording module.

[0017] According to the above technical solution, a temperature sensor 1 is installed inside the hot inlet pipe and the hot outlet pipe, and a temperature sensor 2 is installed inside the cold inlet pipe and the cold outlet pipe. The temperature sensor 1 and the temperature sensor 2 are electrically connected to the controller.

[0018] According to the above technical solution, the heat exchange system includes the following methods:

[0019] Method 1: When the cold and hot media enter the heat exchanger, pressure gauge 2 on the cold inlet pipe detects the pressure in real time and transmits it to the controller. Simultaneously, pressure gauge 1 on the hot inlet pipe detects the inlet pipe pressure in real time and transmits it to the controller, marked as... When the heat-exchanged medium flows out through the hot outlet pipe and the cold outlet pipe respectively, the pressure gauge 1 on the hot outlet pipe and the pressure gauge 2 on the cold outlet pipe detect the outlet pipe pressure and transmit it to the controller, which is then marked as... ;

[0020] Method 2: Set the normal pressure of the cold and hot media after heat exchange in the controller. When the pressures of both the cold and hot media after heat exchange are not as set... If the pressures are equal, it indicates a leak between compartment one and compartment two, suggesting a problem with the heat exchanger. In this case, a signal should be transmitted to the operator to halt the heat exchanger's operation. If only one set of media pressures matches the set pressure... If they are not equal, it indicates that there is leakage in the interval of the medium during transmission, and the degree of leakage needs to be further determined.

[0021] According to the above technical solution, method two includes the following steps:

[0022] If a leak occurs in one of the media, maintenance personnel are required. During the maintenance process, in order to ensure heat exchange efficiency at all times, the non-leaking media is diverted to ensure that the media pressure in the hot and cold outlet pipes is consistent.

[0023] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention, by setting a flow component to connect the second connecting pipe to the first connecting pipe, facilitates the hot medium in the hot inlet pipe to enter the second connecting pipe through the central ball. At the same time, valve six is ​​closed and valve three is opened, so that the diverted hot medium flows through the second connecting pipe to the cold outlet pipe, thereby reducing the medium pressure in the hot outlet pipe simultaneously. The controller monitors the pressure value on the hot outlet pipe in real time until it matches the pressure value on the cold outlet pipe, thus avoiding changes in the flow rate of the cold and hot medium due to hydraulic pressure during heat exchanger maintenance, which would affect the heat exchange efficiency. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a side view of the overall structure of the present invention;

[0027] Figure 3 This is the present invention. Figure 2 A magnified view of a portion of region A;

[0028] Figure 4 This is a cross-sectional view of the flow component of the present invention. Figure 1 ;

[0029] Figure 5 This is a cross-sectional view of the flow component of the present invention. Figure 2 ;

[0030] Figure 6 This is a schematic diagram of the heat exchanger of the present invention;

[0031] Figure 7 This is a schematic diagram of the fluid state of the heat exchanger of the present invention;

[0032] Figure 8 This is a two-dimensional schematic diagram of the front of the heat exchanger of the present invention;

[0033] Figure 9 This is a schematic diagram of the circulation component state of the present invention. Figure 1 ;

[0034] Figure 10 This is a schematic diagram of the circulation component state of the present invention. Figure 2 ;

[0035] In the diagram: 1. Base plate; 2. Heat exchanger; 3. Controller; 4. Hot inlet pipe; 5. Hot outlet pipe; 6. Pressure gauge one; 7. Cold outlet pipe; 8. Pressure gauge two; 9. Cold inlet pipe; 10. Connecting pipe two; 11. Connecting pipe one; 12. Central ball; 13. Compartment two; 14. Central pipe two; 15. First motor; 16. Connecting ball; 17. Connecting plate; 18. Valve six; 19. Arc-shaped baffle; 20. Connecting hole one; 21. Connecting... 21. Connecting hole 2; 22. Central hole 4; 23. Central hole 1; 24. Central hole 2; 25. Central pipe 1; 26. Cavity; 27. Connecting shaft; 28. Valve 3; 29. ​​Valve 4; 30. Central hole 3; 31. Valve 1; 32. Valve 2; 33. Partition; 34. Compartment 1; 35. Temperature sensor 1; 36. Temperature sensor 2; 37. Valve 5; 38. Transmission pipe; 39. Three-way valve; 40. Switch valve. 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] Please see Figure 1-10The present invention provides a technical solution: a plate heat exchanger and a heat exchange system, including a base plate 1, a heat exchanger 2, a heat exchange component and a controller 3 are arranged on the top of the base plate 1, the heat exchanger 2 is arranged on one side of the heat exchange component, and the heat exchange component is connected to the heat exchanger 2 for heat exchange of the medium.

[0038] A flow control component is provided in the middle of the heat exchange assembly to control the medium between the heat exchange assemblies.

[0039] The heat exchange assembly includes a hot inlet pipe 4, a hot outlet pipe 5, a cold inlet pipe 9, and a cold outlet pipe 7. The hot inlet pipe 4 and the hot outlet pipe 5 are respectively connected to the top of the heat exchanger 2, and the cold inlet pipe 9 and the cold outlet pipe 7 are respectively connected to the bottom of the heat exchanger 2.

[0040] Pressure gauge 6 and valve 31 are connected to both the hot inlet pipe 4 and the hot outlet pipe 5. Pressure gauge 8 and valve 32 are connected to both the cold inlet pipe 9 and the cold outlet pipe 7. Pressure gauge 6 and pressure gauge 8 are electrically connected to the controller 3. Temperature sensor 35 is installed inside the hot inlet pipe 4 and the hot outlet pipe 5. Temperature sensor 36 is installed inside the cold inlet pipe 9 and the cold outlet pipe 7. Temperature sensor 35 and temperature sensor 36 are electrically connected to the controller 3.

[0041] Both the hot outlet pipe 5 and the cold outlet pipe 7 are connected to a switch valve 40. The hot outlet pipe 5 and the cold outlet pipe 7 are connected to a transmission pipe 38. A three-way valve 39 is connected to the transmission pipe 38. One end of the three-way valve 39 is connected to a storage tank (not shown in the figure). The switch valve 40 and the three-way valve 39 are electrically connected to the controller 3.

[0042] Connect the hot inlet pipe 4 to an external heat source and open valve 31 on the hot inlet pipe 4 to allow the hot medium to enter the heat exchanger 2 through the hot inlet pipe 4. After heat exchange, the hot medium exits through the hot outlet pipe 5. Connect the cold inlet pipe 9 to an external cold medium source and open valve 32 to allow the external cold medium to enter the heat exchanger 2. The cold medium carries away the heat from the hot medium and flows out through the hot outlet pipe 5, thus completing the heat exchange.

[0043] The heat exchanger 2 includes several partitions 33, and a first partition 34 and a second partition 13 are formed between the partitions 33. The hot inlet pipe 4, the hot outlet pipe 5, the cold inlet pipe 9, and the cold outlet pipe 7 all extend into the partitions 33 and pass through the partitions 33. The hot inlet pipe 4 and the hot outlet pipe 5 pass through the first partition 34, and the cold inlet pipe 9 and the cold outlet pipe 7 pass through the second partition 13. The hot medium enters the first partition 34, and the cold medium enters the second partition 13. Heat is transferred through the partitions 33 to make the heat exchanger 2 exchange heat.

[0044] The circulation assembly includes a central ball 12, a first connecting pipe 11, and a second connecting pipe 10. The first connecting pipe 11 is connected between the hot inlet pipe 4 and the cold inlet pipe 9, and the second connecting pipe 10 is connected between the hot outlet pipe 5 and the cold outlet pipe 7. The first connecting pipe 11 is connected to a third valve 28 and a fifth valve 37, with the fifth valve 37 located above the third valve 28. The second connecting pipe 10 is connected to a fourth valve 29 and a sixth valve 18, with the sixth valve 18 located above the fourth valve 29. The hot inlet pipe 4 and the cold inlet pipe 9 can be connected through the third valve 28 and the fifth valve 37, and the hot outlet pipe 5 and the cold outlet pipe 7 can be connected through the fourth valve 29 and the sixth valve 18. The central ball 12 has a cavity 26 inside.

[0045] Valve 3.28 and valve 5.37 are one-way valves to prevent backflow of the medium.

[0046] It should be added that pressure gauge 6 and pressure gauge 8 are located on the side closer to heat exchanger 2, while the flow assembly is located on the side farther away from heat exchanger 2, to avoid affecting the medium pressure on the hot outlet pipe 5 and cold outlet pipe 7 when the flow assembly is working.

[0047] A central tube 25 is connected between the central ball 12 and the connecting tube 11, and a central tube 24 is connected between the central ball 12 and the connecting tube 2 10. The central tube 25 is provided with a central hole 23 and a central hole 24, respectively. The central tube 24 is provided with a central hole 30 and a central hole 4 22, respectively.

[0048] A first motor 15 is fixed to one side of the central ball 12. The central ball 12 is hollow. A connecting shaft 27 is connected to the intermediate bearing inside the central ball 12. The output end of the first motor 15 is fixedly connected to the connecting shaft 27. A connecting ball 16 is fixed to the outside of the connecting shaft 27. Connecting plates 17 are fixed to both sides of the connecting ball 16. An arc-shaped baffle 19 is fixed to one side of each connecting plate 17. Two sets of connecting holes 20 are opened on the arc-shaped baffle 19 near the first connecting pipe 11. Two sets of connecting holes 21 are opened on the arc-shaped baffle 19 near the second connecting pipe 10. The first motor 15 is electrically connected to the controller 3.

[0049] The first motor 15 is started to drive the connecting shaft 27 to rotate, which in turn drives the connecting ball 16 to rotate. The connecting plates 17 on both sides of the connecting ball 16 follow the rotation, so that the connecting hole 1 20 and the central hole 1 23 cooperate with the central hole 2 24. At the same time, the connecting hole 2 21 is controlled to cooperate with the central hole 30 and the central hole 4 22, thereby connecting the connecting pipe 2 10 and the connecting pipe 1 11, which can improve the heat exchange quality of the heat exchanger.

[0050] Example 1:

[0051] In this embodiment, it is possible to determine whether there is a leak in the heat exchanger 2 during heat exchange, and the heat exchange efficiency of the heat exchanger 2 can be guaranteed by switching the flow components.

[0052] Specifically, during heat exchange, the hot inlet pipe 4 transfers the hot medium to compartment 34, while the cold medium enters compartment 13 through the cold inlet pipe 9. Heat is transferred through the partition 33, resulting in temperature exchange between the hot and cold media. After heat exchange, the media flow out through the hot outlet pipe 5 and the cold outlet pipe 7, respectively. When the cold and hot media enter the heat exchanger 2, the pressure gauge 8 on the cold inlet pipe 9 detects the pressure in real time and transmits it to the controller 3. Simultaneously, the pressure gauge 6 on the hot inlet pipe 4 detects the pressure in the inlet pipe in real time and transmits it to the controller 3, marked as... When the heat-exchanged medium flows out through the hot outlet pipe 5 and the cold outlet pipe 7 respectively, the pressure gauge 6 on the hot outlet pipe 5 and the pressure gauge 8 on the cold outlet pipe 7 detect the outlet pressure and transmit it to the controller 3, which is then marked as... .

[0053] In controller 3, the normal pressures of the cold and hot media after heat exchange are set to... When the pressures of both the cold and hot media after heat exchange are not as set... If the pressures are equal, it indicates a leak between compartment 34 (first compartment) and compartment 13 (second compartment), suggesting a problem with heat exchanger 2 during heat exchange. In this case, a signal is transmitted to the operator to suspend the operation of heat exchanger 2. If only the pressure of one set of media is equal to the set pressure... If the values ​​are unequal, it indicates that there is leakage in the interval of the medium during transmission, and further assessment of the degree of leakage is needed.

[0054] Specifically, a time recording module is set in controller 3, and the time is set to t. Within the time t, it is determined whether the pressure of the transmitted medium changes. If the monitored pressure is constant, it indicates that the medium leakage is stable. If the monitored pressure gradually decreases, it indicates that the medium leakage is more serious.

[0055] If a leak occurs in one of the media, maintenance is required. During maintenance, to ensure heat exchange efficiency, the flow of the non-leaking media is controlled to maintain consistent media pressure between the hot outlet pipe 5 and the cold outlet pipe 7. For example, when the pressure of the cold medium in the cold outlet pipe 7 decreases, valve 37 on connecting pipe 11 is opened, valve 28 is kept closed, and the first motor 15 is started, rotating the connecting plate 17 so that connecting hole 20 aligns with central hole 24, and connecting hole 21 aligns with central hole 30 (e.g., ...). Figure 9As shown, connecting pipe 2 10 is connected to connecting pipe 1 11, so that the hot medium in the hot inlet pipe 4 can enter the connecting pipe 2 10 through the central ball 12. At the same time, valve 6 18 is closed and valve 3 28 is opened, so that the diverted hot medium flows through connecting pipe 2 10 to the cold outlet pipe 7, thereby reducing the medium pressure in the hot outlet pipe 5. The controller 3 monitors the pressure value on the hot outlet pipe 5 in real time until it matches the pressure value on the cold outlet pipe 7, so as to avoid the flow rate change of the cold medium and hot medium due to hydraulic pressure when maintaining heat exchanger 2, which would affect the heat exchange efficiency.

[0056] It should be added that when the medium leakage is severe, the first motor 15 is activated to control the connecting plate 17 to rotate at a larger angle, so that the two arc-shaped baffles 19 no longer block the central hole 1 23 and central hole 24, and no longer block the central hole 4 22 and central hole 30 (e.g. Figure 10 As shown in the figure, this controls the amount of outflowing medium. In the event of severe medium leakage, the pressure value of the hot outlet pipe 5 can be adjusted to match that of the cold outlet pipe 7 as soon as possible, thereby further ensuring heat exchange efficiency.

[0057] Example 2:

[0058] In this embodiment, based on the case of Embodiment 1, it is necessary to further ensure the temperature of the cold medium and the hot medium after heat exchange.

[0059] Specifically, temperature sensor 35 inside the heat inlet pipe 4 detects the temperature of the heat medium entering the heat exchanger 2 and transmits it to the controller 3, which records it as follows: The temperature sensor 35 inside the heat outlet pipe 5 detects the temperature of the medium in the heat exchanger 2 and transmits it to the controller 3, which records it as follows. ;

[0060] Temperature sensor 26 inside the cold inlet pipe 9 detects the temperature of the cold medium entering the heat exchanger 2 and transmits it to the controller 3, which records it as follows: Temperature sensor 36 inside the cold outlet pipe 7 detects the temperature of the cold medium in heat exchanger 2 and transmits it to controller 3, which records it as follows. ;

[0061] The temperature of the heat transfer medium after heat transfer is compared. Since the normal temperature of the heat transfer medium in the heat outlet pipe 5 is set in controller 3, ,when When this occurs, it indicates that the temperature of the heat medium after heat exchange in heat exchanger 2 is still too high. When the temperature of the heat medium after heat exchange in heat exchanger 2 is within the normal range, it indicates that the temperature of the heat medium after heat exchange is within the normal range.

[0062] The temperature of the cold medium after heat exchange is compared, and the normal temperature of the cold medium in the cold outlet pipe 7 is set in controller 3. ,when When the temperature of the cold medium after heat exchange in heat exchanger 2 is too low, it indicates that the cold medium has absorbed less heat. When the temperature of the cold medium after heat exchange in heat exchanger 2 is within the normal range, it indicates that a significant amount of heat has been absorbed.

[0063] Furthermore, in the event of leakage in one of the media, such as the case where the pressure of the cold medium in the cold outlet pipe 7 decreases as illustrated in Example 1, although the flow assembly is adjusted to maintain pressure synchronization between the cold outlet pipe 7 and the hot outlet pipe 5, the medium temperatures in the hot outlet pipe 5 and the cold outlet pipe 7 will become unbalanced before pressure synchronization is achieved. Therefore, during the use of the flow assembly, if both a high temperature of the hot medium and a low temperature of the cold medium in the heat exchanger 2 are detected simultaneously, a signal is transmitted to the switching valve 40 to control the heat exchanger. When the switching valves 40 on outlet pipe 5 and cold outlet pipe 7 are closed, the three-way valve 39 is opened, allowing the medium from hot outlet pipe 5 and cold outlet pipe 7 to be transferred to the storage tank through the transmission pipe 38. At this time, the flow components are being regulated until the pressures of cold outlet pipe 7 and hot outlet pipe 5 are synchronized and the medium temperatures are within the normal range. Then, the three-way valve 39 is closed and the switching valve 40 is opened to continue outputting the heat-exchanged medium. However, when the pressures of cold outlet pipe 7 and hot outlet pipe 5 are synchronized, the medium temperature is still not within the normal range, indicating that the temperature difference between the hot and cold media is large, and the heat exchanger 2 needs to be readjusted.

[0064] During the use of the circulation components, if it is detected in real time that the temperature of only one heat exchange medium is outside the normal range, such as when the heat medium in the heat inlet pipe 4 is outside the normal range, then only the switch valve 40 on the heat outlet pipe 5 is closed, and then the three-way valve 39 is opened, so that the heat exchanged medium is transferred to the storage tank through the transfer pipe 38, thus avoiding the heat medium being out of the normal range and affecting subsequent work.

[0065] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0066] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A plate heat exchanger, comprising a base plate (1), characterized in that: The top of the base plate (1) is provided with a heat exchanger (2), a heat exchange component and a controller (3). The heat exchanger (2) is located on one side of the heat exchange component, and the heat exchange component is connected to the heat exchanger (2) for heat exchange of the medium. The heat exchange assembly includes a heat inlet pipe (4), a heat outlet pipe (5), a cold inlet pipe (9), and a cold outlet pipe (7), wherein: The hot inlet pipe (4) and hot outlet pipe (5) are respectively connected to the top of the heat exchanger (2), and the cold inlet pipe (9) and cold outlet pipe (7) are respectively connected to the bottom of the heat exchanger (2); The heat exchange assembly is provided with a flow assembly in the middle. The flow assembly includes a central ball (12), a connecting pipe one (11) and a connecting pipe two (10). The connecting pipe one (11) is connected between the hot inlet pipe (4) and the cold inlet pipe (9). The connecting pipe two (10) is connected between the hot outlet pipe (5) and the cold outlet pipe (7). The connecting pipe one (11) is connected with valve three (28) and valve five (37), wherein the valve five (37) is located above the valve three (28). The connecting pipe two (10) is connected with valve four (29) and valve six (18), wherein the valve six (18) is located above the valve four (29). A first motor (15) is fixed on one side of the central ball (12). The central ball (12) is hollow. A connecting shaft (27) is connected to the middle bearing inside the central ball (12). The output end of the first motor (15) is fixedly connected to the connecting shaft (27). A connecting ball (16) is fixed to the outside of the connecting shaft (27). A connecting plate (17) is fixed on both sides of the connecting ball (16). An arc-shaped baffle (19) is fixed on one side of each connecting plate (17). Two sets of connecting holes (20) are opened on the arc-shaped baffle (19) near the first connecting pipe (11). Two sets of connecting holes (21) are opened on the arc-shaped baffle (19) near the second connecting pipe (10). The first motor (15) is electrically connected to the controller (3). The central ball (12) is connected to the connecting tube one (11) by a central tube one (25), and the central ball (12) is connected to the connecting tube two (10) by a central tube two (14). The central tube one (25) is provided with a central hole one (23) and a central hole two (24) respectively. The central tube two (14) is provided with a central hole three (30) and a central hole four (22) respectively. Pressure gauge 1 (6) and valve 1 (31) are connected to both the hot inlet pipe (4) and the hot outlet pipe (5). Pressure gauge 2 (8) and valve 2 (32) are connected to both the cold inlet pipe (9) and the cold outlet pipe (7). Pressure gauge 1 (6) and pressure gauge 2 (8) are electrically connected to the controller (3).

2. A plate heat exchanger according to claim 1, characterized in that: A switch valve (40) is connected to the output head of both the hot outlet pipe (5) and the cold outlet pipe (7). A transmission pipe (38) is connected to the hot outlet pipe (5) and the cold outlet pipe (7). A three-way valve (39) is connected to the transmission pipe (38). One end of the three-way valve (39) is connected to a storage tank. The switch valve (40) and the three-way valve (39) are electrically connected to the controller (3).

3. A plate heat exchanger according to claim 2, characterized in that: The heat exchanger (2) includes several partitions (33), and a first partition (34) and a second partition (13) are formed between the several partitions (33). The hot inlet pipe (4), the hot outlet pipe (5), the cold inlet pipe (9) and the cold outlet pipe (7) all extend into the partitions (33) and penetrate the several partitions (33). The hot inlet pipe (4) and the hot outlet pipe (5) both penetrate the first partition (34), and the cold inlet pipe (9) and the cold outlet pipe (7) both penetrate the second partition (13).

4. A plate heat exchanger according to claim 3, characterized in that: The pressure gauge 1 (6) and pressure gauge 2 (8) are located on the side closer to the heat exchanger (2), and the flow assembly is located on the side farther away from the heat exchanger (2). The controller (3) includes a time recording module.

5. A plate heat exchanger according to claim 4, characterized in that: Temperature sensor 1 (35) is installed inside the hot inlet pipe (4) and the hot outlet pipe (5), and temperature sensor 2 (36) is installed inside the cold inlet pipe (9) and the cold outlet pipe (7). Temperature sensor 1 (35) and temperature sensor 2 (36) are electrically connected to the controller (3).

6. A heat exchange system for a plate heat exchanger, using the plate heat exchanger of claim 5, wherein the heat exchange system comprises the following method: Method 1: When the cold and hot media enter the heat exchanger (2), the pressure gauge 2 (8) on the cold inlet pipe (9) detects the pressure in real time and transmits it to the controller (3). At the same time, the pressure gauge 1 (6) on the hot inlet pipe (4) detects the pressure of the inlet pipe in real time and transmits it to the controller (3), marked as... When the heat-exchanged medium flows out through the hot outlet pipe (5) and the cold outlet pipe (7) respectively, the pressure gauge 1 (6) on the hot outlet pipe (5) and the pressure gauge 2 (8) on the cold outlet pipe (7) detect the outlet pressure and transmit it to the controller (3), which is marked as... ; Method 2: Set the normal pressure of the cold and hot media after heat exchange in the controller (3) to be... When the pressures of both the cold and hot media after heat exchange are not as set... When the pressures are equal, it indicates that there is a leak between compartment 1 (34) and compartment 2 (13), indicating that there is a problem with heat exchanger (2) during heat exchange. At this time, the signal is transmitted to the staff to suspend the operation of heat exchanger (2); when only the pressure of one set of media is equal to the set pressure, the signal is transmitted to the staff to suspend the operation of heat exchanger (2). If they are not equal, it indicates that there is leakage in the interval of the medium during transmission, and the degree of leakage needs to be further determined.

7. The heat exchange system of a plate heat exchanger according to claim 6, characterized in that: The second method includes the following steps: When there is a leak in one of the media, staff need to come to repair it. In order to ensure heat exchange efficiency at all times during the repair process, the non-leaking media is controlled to divert the flow to ensure that the media pressure of the hot outlet pipe (5) and the cold outlet pipe (7) is consistent.

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