A plate heat exchanger for solar heating

Abstract

The present invention discloses a plate heat exchanger for solar heating, which relates to the technical field of plate heat exchangers, including a fixed plate body, which is divided into two, a main fixed plate and a secondary fixed plate, and a heat exchange component is further arranged between the two fixed plates of the fixed plate body, the heat exchange component includes a plate body part and a driving part, the plate body part includes a plurality of heat exchange plates, the upper and lower surfaces of the heat exchange plate body are both provided with top mounting grooves, a top mounting block is provided at the center of the top mounting groove, a limiting rod body that matches the top mounting block is provided between the two fixed plates of the fixed plate body, and the driving part includes: a top mounting frame, and the top mounting frame is arranged on the upper surface of the fixed plate body. In this solution, by providing a heat exchange component, the situation in which scale is generated during use and affects the heat exchange effect is avoided, and the cleaning scraper can be used for targeted cleaning, avoiding the overall dismantling and cleaning of the equipment, effectively improving the equipment operation efficiency and maintenance convenience.

Description

Technical Field

[0001] The present invention relates to the technical field of plate heat exchangers, in particular to a plate heat exchanger used for solar heating. Background Art

[0002] In the field of energy utilization and conversion, solar energy, as a clean and renewable energy source, is receiving more and more attention and is widely used. The solar heating system is an important equipment that uses solar energy to convert thermal energy, and the plate heat exchanger plays a key role in it. The plate heat exchanger is a high-efficiency heat exchange equipment. Its core principle is based on heat conduction and convection heat transfer. It is composed of a series of stacked metal sheets with a certain corrugated shape. Narrow flow channels are formed between these metal sheets. The cold and hot fluids flow in opposite directions in adjacent flow channels respectively, and heat is transferred through the metal sheets, thereby realizing heat exchange.

[0003] Existing plate heat exchangers still have many inconveniences. The hot liquid channel and cold liquid channel of the existing plate heat exchanger are often not fully considered in their structures. The impact of temperature differences, due to the high temperature of the fluid in the hot liquid channel, will accelerate the combination of calcium, magnesium and other ions in the water with anions to form scale, while the scale generation rate in the cold liquid channel is slower, but the existing channel structure cannot be optimized according to this difference, resulting in a flow difference in the hot liquid channel and the cold liquid channel due to the different amounts of scale accumulation after long-term use under the same input flow rate. The fluid flow rates on both sides are not matched, the heat transfer coefficient is reduced, and the existing channel structure is prone to scale accumulation at the water outlet, which makes the water flow rate at the water outlet slower. Once scale accumulates, it will not only further reduce the channel cross-sectional area and increase the water flow resistance, but also reduce the heat exchange efficiency and affect the performance of the entire solar heating system. Moreover, due to the lack of an effective cleaning structure design, it is difficult to effectively clean the scale accumulated at the water outlet, and maintenance can only be carried out by dismantling the equipment as a whole, which increases maintenance cost and difficulty. Summary of the Invention

[0004] The object of the present invention is to provide a plate heat exchanger for solar heating to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a plate heat exchanger for solar heating, comprising:

[0006] A fixed plate body, the fixed plate body is divided into two, a main fixed plate and a secondary fixed plate, and a heat exchange component is further provided between the two fixed plates of the fixed plate body, the heat exchange component including a plate body component and a driving component;

[0007] The plate body component includes a plurality of heat exchange plates, and the upper and lower surfaces of the heat exchange plates are provided with top mounting grooves, and a top mounting block is provided at the center of the top mounting groove. A limiting rod body that cooperates with the top mounting block is provided between the two fixed plates of the fixed plate body, and a hot liquid cavity and a cold liquid cavity are provided on both side surfaces of the heat exchange plate body respectively. A dividing strip is further provided on both side surfaces of the heat exchange plate body, and a side groove is further provided on one side surface of the dividing strip. A movable limiting plate body is provided inside the side groove, and a movable cleaning scraper is further provided on one side surface of the limiting plate body;

[0008] The driving component includes: a top mounting bracket, the top mounting bracket is arranged on the upper surface of the fixed plate body, the upper surface of the top mounting bracket is provided with a top box body, a movable connecting plate body is provided at the center of the top mounting bracket, the bottom surface of the connecting plate body is provided with two connecting base frames, a side surface of the connecting base frame is provided with a plurality of connecting supports, the plurality of connecting supports are respectively connected to a plurality of limiting plate bodies, and a force-bearing shaft body is provided at the connection between the limiting plate body and the connecting support bars.

[0009] Furthermore, a hot liquid channel and a cold liquid channel are respectively opened at the center of the heat exchange plate body, the hot liquid channel includes a hot liquid outlet and a hot liquid inlet, the hot liquid outlet and the hot liquid inlet are both connected to the hot liquid cavity, and the cold liquid channel includes a cold liquid inlet and a cold liquid outlet, the cold liquid inlet and the cold liquid outlet are both connected to the cold liquid cavity.

[0010] Furthermore, a small motor is provided inside the limiting plate body, an engaging screw is provided on the output end of the small motor, and an engaging plate body that cooperates with the engaging screw is provided on one side surface of the cleaning scraper.

[0011] Furthermore, a central installation groove is provided at the center of the connecting plate body, a signal processor is provided inside the central installation groove, and force-bearing support bars are provided on both side surfaces of the connecting plate body.

[0012] Furthermore, the upper surface of the top mounting frame is further provided with a telescopic motor that cooperates with the force-bearing support bar, and the upper surface of the top mounting frame is further provided with a fixing mounting piece for fixing the telescopic motor.

[0013] Furthermore, one side surface of the hot liquid outlet and the cold liquid outlet are both provided with a limiting slope, the structures inside the hot liquid cavity and the cold liquid cavity are only different in direction, one side surface of the dividing strip is provided with a connecting block, and the other side surface of the dividing strip is provided with a connecting groove, and the connecting block and the connecting groove are both for facilitating the connection between multiple heat exchange plates.

[0014] Furthermore, a bottom limiting rod is provided between the two fixed plates, and four water outlets are opened on one side surface of the fixed plate body. The surfaces of the four water outlets are provided with detection components, and the detection components include: a detection tube body, one side surface of the detection tube body is connected to the one side surface of the fixed plate body, and a detection annular seat is provided at the center of the detection tube body.

[0015] Furthermore, a central movable ring is provided at the center of the detection ring seat, and a shrinkage ring tube is also provided at the center of the detection ring seat, one end of the shrinkage ring tube is connected to one side surface of the central movable ring, a pressure detector is provided inside the shrinkage ring tube, and a flow rate detector is provided at the center of the central movable ring.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In this solution, a plate component is provided, and precise installation and positioning are achieved through the cooperation of the top mounting block and the limiting rod. A hot liquid cavity and a cold liquid cavity are respectively provided on both sides of the heat exchange plate, which are strictly divided by a separator to ensure that the hot liquid and the cold liquid do not mix with each other, effectively ensuring the efficiency of heat exchange. At the same time, the limiting slopes provided at the hot liquid outlet and the cold liquid outlet narrow the outlet channel, and the water flow velocity is significantly increased under the action of pressure, solving the problem of scale easily left at the outlet. In addition, the connecting blocks and connecting grooves on the separator facilitate close connection between multiple heat exchange plates, further enhancing the stability of the overall structure. The design of the movable limiting plate and the cleaning scraper can carry out targeted cleaning of the scale in the hot liquid cavity after detecting scale, avoiding the trouble of frequently dismantling the entire equipment for cleaning, thereby improving the use efficiency and life of the equipment.

[0018] 2. In this solution, by providing a driving component, the force-bearing support bars on both sides of the connecting plate body cooperate with the telescopic motor, and the connection between the connecting base frame and the connecting support bar and the limiting plate body can accurately control the position adjustment of the limiting plate body. When scale accumulates, the signal processor issues a command to control the telescopic motor to extend and retract, driving the entire force-bearing support bar and the connecting plate body to move, thereby causing the limiting plate body to rotate around the connecting axis, thereby achieving flexible adjustment of the position of the limiting plate body, so as to better perform the limiting work. During the cleaning process, by repeatedly driving the connecting plate body to move, the scale inside the equipment is completely scraped off in cooperation with the cleaning scraper, thereby reducing the disassembly and damage of the equipment and reducing maintenance costs.

[0019] 3. In this solution, a detection component is provided, and the movement of the central movable ring in the detection ring seat drives the contraction ring tube to expand and contract, thereby realizing real-time monitoring of fluid pressure changes. At the same time, the flow rate detector in the center of the central movable ring is used to accurately measure the fluid flow rate. This design can simultaneously obtain fluid pressure and flow rate data, and through the coordinated work of multiple groups of detection components at the inlets and outlets of the hot liquid channel and the cold liquid channel, the water flow state is comprehensively monitored, and the channel narrowing caused by scale accumulation can be more keenly captured. When an abnormal increase in the outlet flow rate and an abnormal decrease in the water pressure are detected, the scale problem can be accurately determined, providing timely and accurate basis for subsequent scale cleaning and equipment maintenance, greatly improving the stability and reliability of equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 Schematic diagram of the internal structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the front structure of the heat exchange plate body of the present invention;

[0023] Figure 4 This is a schematic diagram of the negative structure of the heat exchange plate of the present invention;

[0024] Figure 5 This is a schematic diagram of the arrangement structure of the plate components of the present invention;

[0025] Figure 6 It is a schematic structural diagram of the driving component of the present invention;

[0026] Figure 7 Schematic diagram of the limiting plate structure of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of the cleaning scraper of the present invention;

[0028] Figure 9 Schematic diagram of the detection component structure of the present invention.

[0029] In the figure: 1. Fixed plate; 2. Detection tube; 3. Flow rate detector; 4. Top box; 5. Heat exchange plate; 6. Top mounting bracket; 7. Signal processor; 8. Telescopic motor; 9. Connecting plate; 10. Connecting base; 11. Cold liquid inlet; 12. Cold liquid outlet; 13. Hot liquid outlet; 14. Hot liquid inlet; 15. Separator; 16. Hot liquid cavity; 17. Connecting groove; 18. Connecting block; 19. Limiting slope; 20. Limiting plate 21. Side groove; 22. Top mounting groove; 23. Cooling liquid cavity; 24. Connecting support bar; 25. Center mounting groove; 26. Force support bar; 27. Fixed mounting plate; 28. Cleaning scraper; 29. ​​Connecting shaft; 30. Force shaft; 31. Engaging plate; 32. Small motor; 33. Engaging screw; 34. Bottom limiting rod; 35. Top mounting block; 36. Limiting rod body; 37. Center movable ring; 38. Detection ring seat; 39. Shrink ring tube. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figures 1 to 9 , a plate heat exchanger for solar heating, comprising:

[0032] The fixed plate body 1 plays a vital supporting and positioning role in the overall equipment. The fixed plate body 1 is divided into two, namely the main fixed plate and the auxiliary fixed plate. They cooperate with each other to provide a basic framework for the stable operation of the entire heat exchanger. A bottom limiting rod 34 is provided between the two fixed plates. The bottom limiting rod 34 can effectively limit the relative position between the two fixed plates to prevent unnecessary displacement during use. Four water outlets are provided on one side surface of the fixed plate body 1. The surfaces of the four water outlets are provided with detection components. The detection components include: a detection tube body 2. One side surface of the detection tube body 2 is connected to one side surface of the fixed plate body 1. A detection annular seat 38 is provided at the center of the detection tube body 2. The detection annular seat 38 is made of high-strength, corrosion-resistant material and can withstand the impact force and pressure generated by the fluid during the flow. The detection annular seat 38 A central movable ring 37 is provided at the center, and a shrinkage ring tube 39 is further provided at the center of the detection annular seat 38. The shrinkage ring tube 39 is made of a material with good elasticity and flexibility. It can accurately reflect the movement of the central movable ring 37 while ensuring the stability of its own structure. One end of the shrinkage ring tube 39 is connected to the surface of one side of the central movable ring 37. When the fluid enters or flows out from the water inlet, it will generate a force on the central movable ring 37, causing it to move in the detection annular seat 38, thereby driving the shrinkage ring tube 39 to expand and contract. A pressure detector is provided inside the shrinkage ring tube 39. The expansion and contraction of the shrinkage ring tube 39 will cause its internal pressure to change. The pressure detector can accurately capture these pressure changes and transmit the data to the subsequent signal processing system, providing an important basis for analyzing the fluid state. A flow rate detector 3 is provided at the center of the central movable ring 37;

[0033] In the detection component, the central movable ring 37 can move in the detection ring seat 38. When the equipment is in use, when the fluid enters or flows out from the water inlet, the fluid will generate a force on the central movable ring 37 when passing through, causing it to move in the detection ring seat 38 and drive the shrink ring tube 39 to expand and contract. The pressure detector detects the pressure changes in the shrink ring tube 39 in real time. The flow rate detector 3 detects the flow rate of the fluid when it flows through the central movable ring 37, and transmits the detected pressure and flow rate data to the signal processor 7 for processing in order to monitor and analyze the fluid state. The flow rate and water pressure of the water flow are detected at the inlet and outlet of the hot liquid channel and the cold liquid channel through multiple detection components. This is used to detect whether there is a large change in the flow rate and water pressure of the water flow before and after entering the equipment. When scale is deposited on the surface of the heat exchange plate 5, the channel between the plates will become narrower. According to the principles of fluid mechanics, when the flow rate is constant, the cross-sectional area of ​​the channel decreases and the flow rate of the fluid increases. Under normal circumstances, the inlet and outlet water flow rates should be within a certain reasonable range, and as As scale gradually deposits, channel resistance increases, and the water pressure detected at the water outlet also changes. Due to the different water temperatures in the hot liquid channel and the cold liquid channel, the scale accumulation situation is also different. The fluid temperature in the hot liquid channel is higher, and the high temperature will accelerate the combination of calcium, magnesium ions in the water with anions such as carbonate and sulfate to form insoluble scale components such as calcium carbonate and calcium sulfate. The fluid temperature in the cold liquid channel is relatively low, the ion reaction activity is weak, and the scale formation rate is slow. Under the condition of the same input flow rate, after long-term use of the equipment, it is easy to have flow rate differences due to different scale accumulation amounts. The flow rate difference will cause the fluid flow rates on both sides to mismatch and the heat transfer coefficient to decrease. For example, when the flow rate difference reaches 20%, the heat transfer efficiency may drop by 10% to 15%. When it is detected that the outlet flow rate increases abnormally relative to the inlet flow rate and the water pressure decreases abnormally, it can be determined that the channel is narrowed due to scale accumulation in the equipment. Then, a signal is sent through the signal processor 7 to drive the heat exchange component to start and solve this problem.

[0034] A heat exchange component is also provided between the two fixed plates of the fixed plate body 1. The heat exchange component is carefully arranged between the two fixed plates of the fixed plate body 1. It is the core part of the entire plate heat exchanger to realize the heat exchange function. The heat exchange component is mainly composed of a plate body component and a driving component. The two cooperate with each other to jointly ensure the efficient and stable progress of the heat exchange process. The plate body component includes a plurality of heat exchange plates 5. These heat exchange plates 5 are made of high-quality materials with high thermal conductivity, such as stainless steel or titanium alloy, to ensure that heat can be transferred quickly and effectively during the heat exchange process. Top mounting grooves 22 are provided on the upper and lower surfaces of the heat exchange plate body 5. A top mounting block 35 is provided at the center of the top mounting groove 22. A heat exchange component is provided between the two fixed plates of the fixed plate body 1. A limiting rod 36 cooperates with the top mounting block 35, and multiple heat exchange plates 5 are arranged in an array in the order of positive-negative-positive-negative. This arrangement enables adjacent heat exchange plates 5 to be intertwined with each other to form efficient heat exchange channels, increase the heat exchange area, and improve the heat exchange efficiency. Hot liquid cavities 16 and cold liquid cavities 23 are respectively provided on both side surfaces of the heat exchange plate 5. These two cavities are the main places for heat exchange between hot liquid and cold liquid. In order to ensure that the hot liquid and cold liquid flow independently in their respective cavities without mixing, partition strips 15 are also provided on both side surfaces of the heat exchange plate 5 to divide the hot liquid cavity 16 and the cold liquid cavity 23. A hot liquid channel and a cold liquid channel are respectively opened at the center of the heat exchange plate 5. The hot liquid channel includes a hot liquid outlet 13 and a hot liquid outlet 14. The liquid inlet 14, the hot liquid outlet 13 and the hot liquid inlet 14 are all connected to the hot liquid cavity 16, and the cold liquid cavity 23 cannot be connected to the hot liquid outlet 13 and the hot liquid inlet 14 due to the sealing effect of the partition bar 15. The cold liquid channel includes a cold liquid inlet 11 and a cold liquid outlet 12. The cold liquid inlet 11 and the cold liquid outlet 12 are all connected to the cold liquid cavity 23, and the hot liquid cavity 16 cannot be connected to the cold liquid inlet 11 and the cold liquid outlet 12 due to the sealing effect of the partition bar 15. A limiting slope 19 is provided on one side surface of the hot liquid outlet 13 and the cold liquid outlet 12. The design of the limiting slope 19 can narrow the channel of the water outlet. According to the principle of fluid mechanics, when the fluid passes through the narrowed channel, the water flow rate will be significantly improved. This design not only helps The heat exchange effect is enhanced and the accumulation of scale at the water outlet is reduced to a certain extent, because the higher water flow rate can wash away some of the scale particles that may be attached to the channel wall, thereby extending the service life of the equipment. The structures in the hot liquid cavity 16 and the cold liquid cavity 23 are only different in direction. A connecting block 18 is provided on one side surface of the dividing strip 15, and a connecting groove 17 is provided on the other side surface of the dividing strip 15. The connecting block 18 and the connecting groove 17 are both for the convenience of connecting multiple heat exchange plates 5. When assembling the heat exchange assembly, the connecting block 18 of one heat exchange plate 5 is inserted into the connecting groove 17 of the adjacent heat exchange plate 5. In this way, the multiple heat exchange plates 5 can be tightly and stably connected together to form an integral heat exchange structure.To ensure the structural strength and stability of the entire heat exchange assembly, a side groove 21 is further provided on one side surface of the partition bar 15. A movable limiting plate 20 is provided inside the side groove 21. One end of the limiting plate 20 is connected to the inner side surface of the side groove 21. A connecting shaft 29 is provided at the connection between the limiting plate 20 and the side groove 21. A movable cleaning strip 28 is further provided on one side surface of the limiting plate 20. A small motor 32 is provided inside the limiting plate 20. An engaging screw 33 is provided on the output end of the small motor 32. An engaging plate 31 that cooperates with the engaging screw 33 is provided on one side surface of the cleaning strip 28.

[0035] In this device, a plurality of heat exchange plates 5 are arranged in an array in the order of positive-negative-positive-negative between two fixed plates 1, and are installed and positioned by cooperating with the top mounting block 35 and the limiting rod 36. A hot liquid cavity 16 and a cold liquid cavity 23 are respectively provided on both sides of the heat exchange plate 5. The dividing strip 15 divides them to ensure that the hot liquid and the cold liquid do not mix with each other. When in use, the hot liquid enters the hot liquid cavity 16 from the hot liquid inlet 14, flows through the hot liquid channel, and finally flows out from the hot liquid outlet 13. The cold liquid enters the cold liquid cavity 23 from the cold liquid inlet 11, flows through the cold liquid channel, and finally flows out from the cold liquid outlet 12. During the flow process, the hot liquid and the cold liquid exchange heat through the plate wall of the heat exchange plate 5 to realize heat transfer. By limiting the inclined The slope 19 can narrow the channel of the water outlet. The flow rate of the water will be significantly improved due to the water pressure when it leaves. By increasing the flow rate, the problem of scale being easily left at the water outlet in the prior art is solved. The connecting block 18 and the connecting groove 17 facilitate the connection between multiple heat exchange plates 5 to ensure the stability of the overall structure. When the signal processor 7 receives the signal transmitted by the detection component, it determines which of the two channels has excessive scale accumulation. When it is determined that scale exists, the signal processor 7 sends a signal to start the operation of the driving component. Here, taking the case where there is excessive scale accumulation in the hot liquid channel as an example, the limiting plate 20 in the hot liquid cavity 16 is controlled by the driving component to move toward the inside thereof. Under normal conditions, the limiting plate 20 is not located inside the hot liquid cavity 16. One side surface of the cleaning scraper 28 on one side is combined with the side groove 21 on the inner side surface of the hot liquid cavity 16 to form a plane, and cooperates with the dividing strip 15 to prevent leakage from occurring inside the hot liquid cavity 16. When the limiting plate 20 moves, its surface will also cooperate with the side groove 21 to block the gap in the side groove 21 to prevent leakage. When the limiting plate 20 penetrates into the hot liquid cavity 16, the capacity of the hot liquid cavity 16 will be significantly reduced, and the water flow will also be restricted by the limiting plate 20 when flowing. The water flow distance in the channel is longer. Because the width of the channel is reduced, the speed of the water flow will increase under the action of pressure. Faster, and the flow trajectory of water at this time will be closer to the cold liquid inlet 11 and the cold liquid outlet 12 on the other side, further enhancing the heat exchange effect. After the signal generated by scale is detected, after the work is completed, the signal processor 7 sends a signal to drive the small motor 32, so that the cleaning scraper 28 is extended through the action of the meshing plate 31 and the meshing screw 33. At this time, the limiting plate 20 is repeatedly driven to move by the driving component, and the hot liquid inlet 14 where scale accumulation in the hot liquid cavity 16 is relatively large can be scraped and cleaned by the cleaning scraper 28, and then the water flow is connected to make the scraped scale flush out of the interior of the equipment with the water flow, so as to avoid the need to frequently dismantle the equipment as a whole for cleaning.

[0036] The driving component is a key part for realizing automatic operation and precise control in the heat exchange component of the plate heat exchanger. The driving component includes: a top mounting frame 6, which is arranged on the upper surface of the fixed plate body 1. The upper surface of the top mounting frame 6 is provided with a top box body 4. The top box body 4 has good sealing and protective performance. Its shell is made of waterproof and dustproof materials, which can effectively protect the internal components from interference and damage from the external environment. A movable connecting plate body 9 is provided at the center of the top mounting frame 6. A central mounting groove 25 is provided at the center of the connecting plate body 9. A signal processor 7 is provided inside the central mounting groove 25. The signal processor 7 is one of the core control components of the driving component. It adopts advanced microprocessor technology and signal processing algorithms, and can receive real-time signals transmitted from the detection component. Various signals are received and analyzed, processed and judged. According to the preset program and algorithm, the signal processor 7 can generate corresponding control instructions to control the various actuators in the drive component to perform corresponding actions, thereby realizing the automatic control of the heat exchange component. The surfaces of both sides of the connecting plate body 9 are provided with force-bearing support bars 26. The upper surface of the top mounting frame 6 is also provided with a telescopic motor 8 that cooperates with the force-bearing support bars 26. The upper surface of the top mounting frame 6 is also provided with a fixed mounting piece 27 for fixing the telescopic motor 8. Two connecting base frames 10 are provided on the bottom surface of the connecting plate body 9. A plurality of connecting support bars 24 are provided on one side surface of the connecting base frame 10. The plurality of connecting support bars 24 are respectively connected to the plurality of limiting plate bodies 20. A force-bearing shaft body 30 is provided at the connection between the limiting plate body 20 and the connecting support bar 24.

[0037] The top mounting frame 6 is arranged on the upper surface of the fixed plate body 1, the top box body 4 is located on the upper surface of the top mounting frame 6, the connecting plate body 9 is located at the center of the top mounting frame 6, and a signal processor 7 is provided in the central mounting groove 25 thereof for receiving and processing various signals. The force-bearing struts 26 on both sides of the connecting plate body 9 cooperate with the telescopic motor 8, and the telescopic motor 8 is fixed to the upper surface of the top mounting frame 6 through the fixed mounting piece 27. A plurality of connecting struts 24 are provided on the two connecting base frames 10 on the bottom surface of the connecting plate body 9. The connecting struts 24 are respectively connected to a plurality of limiting plate bodies 20 through force-bearing shaft bodies 30. When the position of the limiting plate 20 needs to be adjusted, an instruction is issued through the signal processor 7 to control the telescopic motor 8 on one side to retract and retract, and the telescopic motor 8 on the other side to extend, thereby driving the entire force-bearing support bar 26 and the connecting plate body 9 to move to one side, and then driving the limiting plate body 20 to rotate around the connecting shaft 29 through the connecting base 10 and the connecting support bar 24 to adjust the position of the limiting plate body 20 so as to better perform the limiting work. During the cleaning work, the connecting plate body 9 is repeatedly driven to move, thereby cooperating with the cleaning scraper 28 to scrape off the scale inside the equipment.

[0038] The working principle of the present invention is:

[0039] During the operation of the equipment, the detection component is always in working condition. It is precisely installed at the inlet and outlet of the hot liquid channel and the cold liquid channel. The central movable ring in the detection component can move flexibly in the detection ring seat. When the fluid enters or flows out of the water inlet, it will generate a force on the central movable ring, prompting it to move in the detection ring seat and drive the shrink ring tube connected to it to expand and contract. At this time, the pressure detector inside the shrink ring tube will monitor the pressure changes in real time, and the flow rate detector at the center of the central movable ring is responsible for detecting the flow rate of the fluid when it flows through. These detection data will be transmitted to the signal processor for analysis and processing in a timely manner;

[0040] Since the fluid temperature in the hot liquid channel is relatively high, it will accelerate the combination of calcium, magnesium and other ions in the water with anions such as carbonate and sulfate, forming insoluble scale components such as calcium carbonate and calcium sulfate. The fluid temperature in the cold liquid channel is relatively low, the ion reaction activity is weak, and the scale generation rate is slow. Therefore, as the equipment is used for a long time, the scale accumulation in the hot liquid channel and the cold liquid channel will gradually become different. Under the condition of the same input flow rate, scale accumulation will narrow the channel between the plates. According to the principles of fluid mechanics, the channel cross-sectional area will decrease, the fluid flow rate will increase, and the channel resistance will increase, and the outlet pressure will decrease. When the detection component detects that the outlet flow rate has increased abnormally relative to the water inlet and the water pressure has decreased abnormally, the signal processor will determine that the channel has narrowed due to scale accumulation in the equipment.

[0041] The heat exchange assembly is the core part of achieving heat exchange. Multiple heat exchange plates are arranged in an array between two fixed plates in the order of positive-negative-positive-negative. The top mounting block and the limiting rod are used to achieve precise installation and positioning. The hot liquid cavity and the cold liquid cavity are respectively set on both sides of each heat exchange plate. The separator strip strictly separates them to ensure that the hot and cold liquids do not mix with each other.

[0042] When the signal processor determines that there is a scale problem, it will send a command to the driving component, and the driving component will start to operate immediately. The top mounting frame of the driving component is set on the upper surface of the fixed plate body, the top box body is located on the upper surface of the top mounting frame, and the connecting plate body is located at the center of the top mounting frame. The signal processor is provided in the central mounting groove. The force-bearing support bars on both sides of the connecting plate body cooperate with the telescopic motor. The telescopic motor is fixed to the upper surface of the top mounting frame through the fixed mounting piece. A plurality of connecting support bars are provided on the two connecting bases on the bottom surface of the connecting plate body. The connecting support bars are respectively connected to the plurality of limiting plates through force-bearing shafts.

[0043] When it is determined that there is excessive scale accumulation in the hot liquid channel, the driving component will control the restriction plate in the hot liquid cavity to move inward. Under normal conditions, the cleaning scraper on one side of the restriction plate is tightly combined with the side groove on the inner side surface of the hot liquid cavity to form a plane, and cooperates with the separation bar to prevent leakage from inside the hot liquid cavity. When the restriction plate moves, its surface will cooperate with the side groove to block the gap to prevent leakage. After the restriction plate penetrates into the hot liquid cavity, the capacity of the hot liquid cavity will be significantly reduced. The water flow will be restricted by the restriction plate during flow, the flow distance will be longer, the channel width will be reduced, the water flow will be faster under the action of pressure, and the flow trajectory will be closer to the cold liquid inlet and outlet, further enhancing the heat exchange effect.

[0044] After the work is completed, the signal processor will drive the small motor to operate, so that the cleaning scraper is extended through the action of the meshing plate and the meshing screw. Then, the driving component repeatedly drives the limiting plate to move, and the cleaning scraper will scrape off the scale at the hot liquid inlet. Finally, the water flow is connected to flush the scraped scale out of the equipment with the water flow, thereby effectively avoiding the situation of frequent dismantling of the equipment for cleaning, and improving the equipment's utilization efficiency and life.

[0045] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A plate heat exchanger for solar heating, characterized in that: include: A fixed plate body, the fixed plate body is divided into two, a main fixed plate and a secondary fixed plate, and a heat exchange component is further provided between the two fixed plates of the fixed plate body, the heat exchange component including a plate body component and a driving component; The plate body component includes a plurality of heat exchange plates, and the upper and lower surfaces of the heat exchange plates are provided with top mounting grooves, and a top mounting block is provided at the center of the top mounting groove. A limiting rod body that cooperates with the top mounting block is provided between the two fixed plates of the fixed plate body, and a hot liquid cavity and a cold liquid cavity are provided on both side surfaces of the heat exchange plate body respectively. A dividing strip is further provided on both side surfaces of the heat exchange plate body, and a side groove is further provided on one side surface of the dividing strip. A movable limiting plate body is provided inside the side groove, and a movable cleaning scraper is further provided on one side surface of the limiting plate body; The driving component includes: a top mounting bracket, the top mounting bracket is arranged on the upper surface of the fixed plate body, the upper surface of the top mounting bracket is provided with a top box body, a movable connecting plate body is provided at the center of the top mounting bracket, the bottom surface of the connecting plate body is provided with two connecting base frames, a side surface of the connecting base frame is provided with a plurality of connecting supports, the plurality of connecting supports are respectively connected to a plurality of limiting plate bodies, and a force-bearing shaft body is provided at the connection between the limiting plate body and the connecting support bars.

2. A plate heat exchanger for solar heating according to claim 1, characterized in that: A hot liquid channel and a cold liquid channel are respectively opened at the center of the heat exchange plate body, the hot liquid channel includes a hot liquid outlet and a hot liquid inlet, and the hot liquid outlet and the hot liquid inlet are both connected to the hot liquid cavity, and the cold liquid channel includes a cold liquid inlet and a cold liquid outlet, and the cold liquid inlet and the cold liquid outlet are both connected to the cold liquid cavity.

3. A plate heat exchanger for solar heating according to claim 1, characterized in that: A small motor is arranged inside the limiting plate body, an engaging screw is arranged on the output end of the small motor, and an engaging plate body matched with the engaging screw is arranged on one side surface of the cleaning scraper.

4. A plate heat exchanger for solar heating according to claim 1, characterized in that: A central installation groove is provided at the center of the connecting plate body, a signal processor is provided inside the central installation groove, and force-bearing support bars are provided on both side surfaces of the connecting plate body.

5. The plate heat exchanger for solar heating according to claim 1, characterized in that: The upper surface of the top mounting frame is further provided with a telescopic motor that matches the force-bearing support bar, and the upper surface of the top mounting frame is further provided with a fixing mounting piece for fixing the telescopic motor.

6. The plate heat exchanger for solar heating according to claim 1, characterized in that: One side surface of the hot liquid outlet and the cold liquid outlet are both provided with a limiting slope, the structures inside the hot liquid cavity and the cold liquid cavity are different only in direction, one side surface of the dividing strip is provided with a connecting block, and the other side surface of the dividing strip is provided with a connecting groove, and the connecting block and the connecting groove are both for facilitating the connection between multiple heat exchange plates.

7. A plate heat exchanger for solar heating according to claim 2, characterized in that: A bottom limiting rod is arranged between the two fixed plates, and four water outlets are opened on one side surface of the fixed plate body. The surfaces of the four water outlets are all provided with detection components, and the detection components include: a detection tube body, one side surface of the detection tube body is connected to the one side surface of the fixed plate body, and a detection annular seat is provided at the center of the detection tube body.

8. A plate heat exchanger for solar heating according to claim 7, characterized in that: A central movable ring is provided at the center of the detection ring seat, and a shrinkage ring tube is also provided at the center of the detection ring seat. One end of the shrinkage ring tube is connected to one side surface of the central movable ring, a pressure detector is provided inside the shrinkage ring tube, and a flow rate detector is provided at the center of the central movable ring.

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