Self-adaptive runner plate heat exchanger capable of replacing heat exchange medium on line

Abstract

The invention belongs to the technical field of heat exchange equipment, and particularly relates to a self-adaptive runner plate heat exchanger capable of replacing a heat exchange medium on line, which comprises a plate heat exchanger main body, and the plate heat exchanger main body is provided with a heating medium inlet, a heating medium outlet, a refrigerant inlet and a refrigerant outlet. The heating medium inlet is fixedly communicated with a first heating medium inlet pipe and a second heating medium inlet pipe, the heating medium outlet is fixedly communicated with a first heating medium output pipe and a second heating medium output pipe, and the refrigerant inlet is fixedly communicated with a refrigerant inlet pipe. According to the plate type heat exchanger, the heating medium heat exchange medium of the plate type heat exchanger body can be replaced on line, shutdown is not needed for medium replacement, long-time production halt caused by operation such as disassembly, cleaning and equipment reassembly is avoided, the production process is continuous and stable, the production efficiency is greatly improved, and economic losses caused by production halt are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of heat exchange equipment, and in particular relates to an adaptive flow channel plate heat exchanger capable of replacing heat exchange medium online. Background Art

[0002] The plate heat exchanger is a high-efficiency heat exchanger made of a series of stacked metal sheets with a certain corrugated shape. Thin rectangular channels are formed between various plates, and heat is exchanged through the plates. The plate heat exchanger is an ideal equipment for liquid-liquid and liquid-steam heat exchange. It has the characteristics of high heat exchange efficiency, small heat loss, compact and light structure, small footprint, wide application and long service life.

[0003] With the development of production or adjustment of products, sometimes different heat exchange media need to be used to meet new production process requirements. For example, when switching from producing one product to producing another product with different temperature control requirements, it is necessary to replace the heat exchange medium with one that is more suitable for the new temperature range. For example, the patent announcement number CN111964490A proposes an adaptive high-efficiency heat exchanger that can replace the heat exchange medium online. When replacing different heat exchange media, the temperature difference between different heat exchange media is large. The large change in heat medium temperature will cause thermal stress in the plates, pipes and other components of the heat exchanger. When the temperature of the new heat medium is higher or lower than the temperature of the original heat medium, the heat exchanger part Components will change in size due to thermal expansion and contraction. If the connection speed is too fast, the temperature changes drastically, and the expansion or contraction of various parts of the components are inconsistent, large thermal stress will be generated. This thermal stress may cause plate deformation, weld cracking, seal failure and other problems, affecting the normal operation and service life of the heat exchanger. Temperature changes will cause changes in the volume of the heat medium, which in turn affects the system pressure. The greater the temperature difference between the new heat medium and the original heat medium, the more obvious the volume change. If the connection speed is too fast, the volume of the heat medium will expand or contract rapidly, which will cause the system pressure to suddenly increase or decrease, which may easily exceed the system's tolerance range and cause safety accidents, such as pipeline rupture and valve damage. Summary of the invention

[0004] The object of the present invention is to provide an adaptive flow channel plate heat exchanger capable of replacing heat exchange medium online in view of the above problems.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: an adaptive flow channel plate heat exchanger capable of replacing heat exchange medium online, comprising a plate heat exchanger body, the plate heat exchanger body being provided with a heat medium inlet, a heat medium outlet, a refrigerant inlet, and a refrigerant outlet, the heat medium inlet being fixedly connected with a first heat medium inlet pipe and a second heat medium inlet pipe, the heat medium outlet being fixedly connected with a first heat medium output pipe and a second heat medium output pipe, the refrigerant inlet being fixedly connected with a refrigerant inlet pipe, the refrigerant outlet being fixedly connected with a refrigerant output pipe, the first heat medium output pipe and the second heat medium output pipe being respectively provided with a first heat medium temperature sensor and a second heat medium temperature sensor, the refrigerant output pipe being provided with a refrigerant temperature sensor, and further comprising: Four pipeline on-off control mechanisms are respectively installed on the first heat medium inlet pipe, the second heat medium inlet pipe, the first heat medium outlet pipe and the second heat medium outlet pipe, and are used to control the on-off opening and closing of the pipelines; The heat exchange quality real-time feedback mechanism is installed on the outer wall of the plate heat exchanger body and is electrically connected to the PLC controller. The PLC controller powers and drives the heat exchange quality real-time feedback mechanism based on the temperature signals fed back by the first heat medium temperature sensor, the second heat medium temperature sensor and the refrigerant temperature sensor. The poor heat exchange quality prompt maintenance mechanism is installed on the outer wall of the plate heat exchanger body and is electrically connected to the PLC controller. The PLC controller controls the start-up action of the poor heat exchange quality prompt maintenance mechanism based on the heat exchange information fed back by the heat exchange quality real-time feedback mechanism; A heat exchanger usage status rectification prompting mechanism is installed on the outer wall of the plate heat exchanger body and is drivingly connected to the poor heat exchange quality prompting and repairing mechanism; The heat medium replacement speed automatic control mechanism is arranged in the heat exchange quality real-time feedback mechanism and is electrically connected to the pipeline on-off control mechanism.

[0006] In the above-mentioned adaptive flow channel plate heat exchanger with online replaceable heat exchange medium, the pipeline on-off control mechanism includes an on-off cylinder, and the on-off cylinder is connected with the first heat medium inlet pipe, the second heat medium inlet pipe, the first heat medium output pipe and the second heat medium output pipe. The internal sealing rotating sleeve of the on-off cylinder is connected with a rotating cylinder, and a through hole is opened on the side wall of the rotating cylinder. A rotating shaft is fixedly connected at the center of the upper end of the rotating cylinder, and a servo motor for driving the rotating shaft to rotate is fixedly installed on the upper end of the on-off cylinder.

[0007] In the above-mentioned adaptive flow channel plate heat exchanger capable of online replacing heat exchange medium, the heat exchange quality real-time feedback mechanism includes a feedback shell, and the inner wall of the feedback shell is respectively fixedly installed with a plurality of first guide slide bars and second guide slide bars arranged side by side, and the plurality of first guide slide bars are externally slidably sleeved with the same refrigerant temperature feedback seat, and the plurality of second guide slide bars are externally slidably sleeved with the same heat medium temperature feedback seat, and the upper ends of the refrigerant temperature feedback seat and the heat medium temperature feedback seat are respectively fixedly connected to the top of the inner wall of the feedback shell with a plurality of sleeves on the first guide slide bars and the second guide slide bars. A compensation spring outside the guide slide rod, a first thrust permanent magnet plate is fixedly installed at the lower end of the refrigerant temperature feedback seat, a first thrust electromagnetic plate arranged opposite to the first thrust permanent magnet plate is fixedly installed at the bottom of the inner wall of the feedback shell, a second thrust permanent magnet plate is fixedly installed at the lower end of the heat medium temperature feedback seat, a second thrust electromagnetic plate arranged opposite to the second thrust permanent magnet plate is fixedly installed at the bottom of the inner wall of the feedback shell, a conductive block is fixedly installed at one end of the refrigerant temperature feedback seat, and an electric connection strip arranged corresponding to the position of the conductive block is fixedly installed at one end of the heat medium temperature feedback seat.

[0008] In the above-mentioned adaptive flow channel plate heat exchanger with online replaceable heat exchange medium, the poor heat exchange quality prompt maintenance mechanism includes a fixed circular shell, an intermediate shaft is rotatably connected at the center of the inner wall of the fixed circular shell, a rotating motor for driving the intermediate shaft to rotate is fixedly installed on the outer wall of the fixed circular shell, a maintenance switch is fixedly installed on one side of the inner wall of the fixed circular shell, an arc-shaped pressing block arranged corresponding to the position of the maintenance switch is fixedly connected to the shaft wall of the intermediate shaft, and the conductive block and the electrical connection strip are connected in series to the power supply circuit of the rotating motor.

[0009] In the above-mentioned adaptive flow channel plate heat exchanger with online replaceable heat exchange medium, the heat exchanger usage status rectification prompt mechanism includes a prompt shell, the inner wall of the prompt shell is rotatably connected with a linkage screw, one end of the linkage screw and one end of the intermediate shaft are transmission connected through a bevel gear assembly, a warning switch is fixedly installed on one side of the inner wall of the prompt shell, and the rod wall of the linkage screw is threadedly sleeved with a trigger plate arranged opposite to the warning switch.

[0010] In the above-mentioned self-adaptive flow channel plate heat exchanger capable of online replacement of heat exchange medium, the automatic control mechanism for the replacement speed of the heat medium includes a potentiometer fixedly installed at one end of the heat medium temperature feedback seat. The rotating end of the potentiometer is fixedly connected with a deflection plate. A torsion spring sleeved outside the rotating end of the potentiometer is fixedly connected to the side of the deflection plate opposite to the potentiometer. The center of the side of the deflection plate away from the potentiometer is fixedly connected with an extension shaft. Two one-way ratchet components are installed on the outer wall of the extension shaft. A transmission gear is fixedly sleeved on the outer wall of the one-way ratchet component. Two electric telescopic rods are symmetrically and fixedly inserted on the front and rear side walls of the feedback shell. The moving ends of multiple electric telescopic rods on the same side are fixedly connected with the same transmission rack meshing with the transmission gear.

[0011] In the above-mentioned self-adaptive flow channel plate heat exchanger capable of online replacement of heat exchange medium, the end of the trigger plate is fixedly connected with a limit slider, and a limit sliding groove matched with the limit slider is opened on the inner wall of the prompt shell.

[0012] In the above-mentioned self-adaptive flow channel plate heat exchanger capable of online replacement of heat exchange medium, an extension cylinder for placing the electric connection strip is integrally connected to the lower end of the feedback shell.

[0013] Compared with the existing technology, the beneficial effects of the present invention are as follows: 1. By setting the plate heat exchanger body, heat medium inlet, heat medium outlet, refrigerant inlet, refrigerant outlet, first heat medium inlet pipe, second heat medium inlet pipe, first heat medium outlet pipe, second heat medium outlet pipe, refrigerant inlet pipe, refrigerant outlet pipe, and pipeline on-off control mechanism, it is possible to realize the online replacement of the heat exchange medium of the heat medium of the plate heat exchanger body without stopping the machine for medium replacement, avoiding long-term production suspension caused by operations such as disassembly, cleaning, and reassembly of the equipment, making the production process continuous and stable, greatly improving production efficiency, and reducing economic losses caused by production suspension.

[0014] 2. Through the provided real-time heat transfer quality feedback mechanism, first heat medium temperature sensor, second heat medium temperature sensor, refrigerant temperature sensor, heat transfer quality poor prompt maintenance mechanism, and heat exchanger usage status rectification prompt mechanism, it is possible to calculate and judge the heat transfer effect of the plate heat exchanger based on the input temperature of the heat medium and the output temperature of the refrigerant medium used by the plate heat exchanger body. When the heat exchanger fails to reach the preset heat transfer value after a period of time, relevant personnel can be timely reminded to check the heat exchanger, and the operator is reminded to pay attention to parameters such as the flow rate, pressure, and temperature of the fluid to ensure that they meet the operating requirements of the heat exchanger. If there are abnormalities, timely adjustments can be made to avoid continuous non-compliance of the heat transfer effect. When the heat transfer effect of the heat exchanger fails to meet the standard for a longer period of time and still fails to meet the standard after multiple inspections and adjustments, the staff can be timely reminded that there are problems with the current heat exchanger, and further in-depth processing can be carried out to avoid the problem that the poor use effect of the heat exchanger affects actual production.

[0015] 3. Through the provided automatic regulation mechanism for the replacement speed of the heat medium, pipeline on-off control mechanism, and real-time heat transfer quality feedback mechanism, when the heat medium needs to be replaced, the access speed of the new heat medium can be automatically regulated based on the temperature difference between the new heat medium temperature and the original heat medium temperature. The larger the temperature difference, the slower the access speed. This can avoid obvious dimensional changes of the heat exchanger components due to thermal expansion and contraction when the temperature difference is large. If the access speed is too fast and the temperature changes rapidly, the expansion or contraction of each part of the component is inconsistent, resulting in large thermal stress and further damaging the heat exchanger components. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a front structural schematic diagram of the present invention; Figure 3 is a three-dimensional sectional structural schematic diagram of the pipeline on-off control mechanism of the present invention; Figure 4 is a sectional structural schematic diagram of the real-time heat transfer quality feedback mechanism of the present invention; Figure 5 is a three-dimensional sectional structural schematic diagram of the heat transfer quality poor prompt maintenance mechanism and the heat exchanger usage status rectification prompt mechanism of the present invention; Figure 6 is a structural schematic diagram of the automatic regulation mechanism for the replacement speed of the heat medium of the present invention; Figure 7 is Figure 6 a three-dimensional structural schematic diagram of the potentiometer installation in Figure 8 is Figure 6 a three-dimensional structural schematic diagram of the installation of the electric telescopic rod and the transmission rack in

[0017] In the figure: 1 plate heat exchanger body, 2 pipeline on-off control mechanism, 21 on-off cylinder, 22 rotating cylinder, 23 through hole, 24 rotating shaft, 25 servo motor, 3 real-time heat transfer quality feedback mechanism, 31 feedback housing, 32 first guiding slide bar, 33 second guiding slide bar, 34 refrigerant temperature feedback seat, 35 heat medium temperature feedback seat, 36 compensation spring, 37 first thrust permanent magnet plate, 38 first thrust electromagnetic plate, 39 second thrust permanent magnet plate, 310 second thrust electromagnetic plate, 311 conductive block, 312 electrical connection strip, 313 extension cylinder, 4 heat transfer quality poor prompt maintenance mechanism, 41 fixed circular housing, 42 intermediate shaft, 43 rotating motor, 44 maintenance switch, 45 arc pressing block, 5 heat exchanger usage condition rectification prompt mechanism, 51 prompt housing, 52 linkage screw rod, 53 bevel gear assembly, 54 warning switch, 55 trigger plate, 6 heat medium medium replacement speed automatic regulation mechanism, 61 potentiometer, 62 deflecting plate, 63 torsion spring, 64 extension shaft, 65 one-way ratchet assembly, 66 transmission gear, 67 electric telescopic rod, 68 transmission rack, 7 heat medium inlet, 8 heat medium outlet, 9 refrigerant inlet, 10 refrigerant outlet, 11 first heat medium inlet pipe, 12 second heat medium inlet pipe, 13 first heat medium outlet pipe, 14 second heat medium outlet pipe, 15 refrigerant inlet pipe, 16 refrigerant outlet pipe, 17 first heat medium temperature sensor, 18 second heat medium temperature sensor, 19 refrigerant temperature sensor. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0019] As Figures 1 - 8 shown, an adaptive flow channel plate heat exchanger capable of online replacement of heat exchange media includes a plate heat exchanger body 1. A heat medium inlet 7, a heat medium outlet 8, a refrigerant inlet 9, and a refrigerant outlet 10 are arranged on the plate heat exchanger body 1. A first heat medium inlet pipe 11 and a second heat medium inlet pipe 12 are fixedly connected and communicated at the heat medium inlet 7. A first heat medium outlet pipe 13 and a second heat medium outlet pipe 14 are fixedly connected and communicated at the heat medium outlet 8. A refrigerant inlet pipe 15 is fixedly connected and communicated at the refrigerant inlet 9. A refrigerant outlet pipe 16 is fixedly connected and communicated at the refrigerant outlet 10. A first heat medium temperature sensor 17 and a second heat medium temperature sensor 18 are respectively arranged on the first heat medium outlet pipe 13 and the second heat medium outlet pipe 14. A refrigerant temperature sensor 19 is arranged on the refrigerant outlet pipe 16. It further includes: Four pipeline on-off control mechanisms 2 are respectively installed on the first heat medium inlet pipe 11, the second heat medium inlet pipe 12, the first heat medium outlet pipe 13 and the second heat medium outlet pipe 14 to control the on-off of the pipelines. The pipeline on-off control mechanism 2 includes an on-off cylinder 21. The on-off cylinder 21 is communicated with the first heat medium inlet pipe 11, the second heat medium inlet pipe 12, the first heat medium outlet pipe 13 and the second heat medium outlet pipe 14. A rotating cylinder 22 is hermetically sleeved and rotated inside the on-off cylinder 21. A through hole 23 is formed through the side wall of the rotating cylinder 22. A rotating shaft 24 is fixedly connected to the center of the upper end of the rotating cylinder 22. A servo motor 25 for driving the rotating shaft 24 to rotate is fixedly installed at the upper end of the on-off cylinder 21.

[0020] The heat exchange quality real-time feedback mechanism 3 is installed on the outer wall of the plate heat exchanger body 1 and is electrically connected to the PLC controller. And the PLC controller supplies power to drive the heat exchange quality real-time feedback mechanism 3 based on the temperature signals fed back by the first heat medium temperature sensor 17, the second heat medium temperature sensor 18 and the refrigerant temperature sensor 19. The heat exchange quality real-time feedback mechanism 3 includes a feedback shell 31. A plurality of first guiding slide rods 32 and second guiding slide rods 33 arranged side by side are fixedly installed on the inner wall of the feedback shell 31. The same refrigerant temperature feedback seat 34 is slidably sleeved outside the plurality of first guiding slide rods 32. The same heat medium temperature feedback seat 35 is slidably sleeved outside the plurality of second guiding slide rods 33. A plurality of compensation springs 36 sleeved outside the first guiding slide rods 32 and the second guiding slide rods 33 are fixedly connected between the upper ends of the refrigerant temperature feedback seat 34 and the heat medium temperature feedback seat 35 and the top of the inner wall of the feedback shell 31. A first thrust permanent magnet plate 37 is fixedly installed at the lower end of the refrigerant temperature feedback seat 34. A first thrust electromagnetic plate 38 arranged opposite to the first thrust permanent magnet plate 37 is fixedly installed at the bottom of the inner wall of the feedback shell 31. A second thrust permanent magnet plate 39 is fixedly installed at the lower end of the heat medium temperature feedback seat 35. A second thrust electromagnetic plate 310 arranged opposite to the second thrust permanent magnet plate 39 is fixedly installed at the bottom of the inner wall of the feedback shell 31. A conductive block 311 is fixedly installed at one end of the refrigerant temperature feedback seat 34. An electric contact strip 312 arranged corresponding to the position of the conductive block 311 is fixedly installed at one end of the heat medium temperature feedback seat 35. An extension cylinder 313 for placing the electric contact strip 312 is integrally connected to the lower end of the feedback shell 31.

[0021] The poor heat exchange quality prompt maintenance mechanism 4 is installed on the outer wall of the plate heat exchanger body 1 and is electrically connected to the PLC controller. The PLC controller controls the start-up action of the poor heat exchange quality prompt maintenance mechanism 4 based on the heat exchange information fed back by the heat exchange quality real-time feedback mechanism 3. The poor heat exchange quality prompt maintenance mechanism 4 includes a fixed circular shell 41, and an intermediate shaft 42 is rotatably connected at the center of the inner wall of the fixed circular shell 41. A rotating motor 43 for driving the intermediate shaft 42 to rotate is fixedly installed on the outer wall of the fixed circular shell 41, and a maintenance switch 44 is fixedly installed on one side of the inner wall of the fixed circular shell 41. The shaft wall of the intermediate shaft 42 is fixedly connected to an arc-shaped pressing block 45 arranged corresponding to the position of the maintenance switch 44, and the conductive block 311 and the electrical connection bar 312 are connected in series to the power supply circuit of the rotating motor 43.

[0022] The heat exchanger usage status rectification prompt mechanism 5 is installed on the outer wall of the plate heat exchanger body 1 and is transmission connected to the poor heat exchange quality prompt and maintenance mechanism 4. The heat exchanger usage status rectification prompt mechanism 5 includes a prompt shell 51. The inner wall of the prompt shell 51 is rotatably connected with a linkage screw 52. One end of the linkage screw 52 and one end of the intermediate shaft 42 are transmission connected through a bevel gear assembly 53. A warning switch 54 is fixedly installed on one side of the inner wall of the prompt shell 51. The rod wall of the linkage screw 52 is threadedly sleeved with a trigger plate 55 arranged opposite to the warning switch 54. The end of the trigger plate 55 is fixedly connected to a limit slider. The inner wall of the prompt shell 51 is provided with a limit slide groove that matches and slides with the limit slider.

[0023] The heat medium replacement speed automatic control mechanism 6 is installed in the heat exchange quality real-time feedback mechanism 3 and is electrically connected to the pipeline on-off control mechanism 2. The heat medium replacement speed automatic control mechanism 6 includes a potentiometer 61 fixedly installed at one end of the heat medium temperature feedback seat 35. The rotating end of the potentiometer 61 is fixedly connected with a deflection plate 62. The deflection plate 62 and the opposite side of the potentiometer 61 are fixedly connected with a torsion spring 63 sleeved outside the rotating end of the potentiometer 61. The center of the deflection plate 62 away from the potentiometer 61 is fixedly connected with an extension shaft 64. Two one-way ratchet assemblies 65 are installed outside the shaft wall of the extension shaft 64. The outer wall of the one-way ratchet assembly 65 is fixedly sleeved with a transmission gear 66. The front and rear side walls of the feedback shell 31 are symmetrically fixed with two electric telescopic rods 67. The moving ends of the multiple electric telescopic rods 67 on the same side are fixedly connected with a transmission rack 68 meshing with the transmission gear 66.

[0024] The operating principle of the present invention is described as follows: When the plate heat exchanger body 1 is used, the first heat medium inlet pipe 11 and the first heat medium outlet pipe 13 are first connected to the heat medium inlet 7 and the heat medium outlet 8, so that the heat medium enters the plate heat exchanger body 1, and the refrigerant medium is sent into the plate heat exchanger body 1 through the refrigerant inlet pipe 15 and the refrigerant outlet pipe 16 connected to the refrigerant inlet 9 and the refrigerant outlet 10 to perform heat exchange; The PLC controller first monitors the temperature of the heat medium fed in based on the first heat medium temperature sensor 17 installed on the first heat medium inlet pipe 11 connected, and monitors the temperature of the refrigerant medium after heat exchange based on the refrigerant temperature sensor 19 on the refrigerant output pipe 16. The PLC controller controls the power supply device to supply power to the second thrust electromagnetic plate 310 and the first thrust electromagnetic plate 38 respectively based on the temperature signals fed back by the first heat medium temperature sensor 17 and the refrigerant temperature sensor 19. Specifically, the larger the temperature value fed back by the first heat medium temperature sensor 17, the PLC controller controls the power supply device to supply a larger current to the second thrust electromagnetic plate 310, thereby making the second thrust electromagnetic plate 310 generate the same and larger magnetic force as the second thrust permanent magnet plate 39, and then providing a larger magnetic thrust to the heat medium temperature feedback seat 35, making the heat medium temperature feedback seat 35 drive the electrical contact strip 312 to move upward by a larger distance, indicating that the refrigerant medium should reach a larger heat exchange temperature after heat exchange. And when the temperature value fed back by the refrigerant temperature sensor 19 is larger, the PLC controller synchronously controls the power supply device to supply a larger current to the first thrust electromagnetic plate 38, thereby making the first thrust electromagnetic plate 38 generate the same and larger magnetic force as the first thrust permanent magnet plate 37, and then making the refrigerant temperature feedback seat 34 move upward by a larger distance, synchronously driving the conductive block 311 to move upward. Under normal heat exchange effect, the upward movement distance of the refrigerant temperature feedback seat 34 should be greater than that of the heat medium temperature feedback seat 35. At this time, the conductive block 311 and the electrical contact strip 312 do not contact. And when the heat exchange effect is not good, at this time the temperature of the refrigerant medium after heat exchange does not reach the preset value, thereby making the upward movement distance of the refrigerant temperature feedback seat 34 relatively small, and then making the conductive block 311 contact with the electrical contact strip 312, connecting the power supply circuit of the rotary motor 43. The rotary motor 43 drives the arc-shaped pressing block 45 to move in the fixed circular shell 41 through the intermediate shaft 42 until the arc-shaped pressing block 45 presses on the maintenance switch 44, and then the PLC controller sends a wireless signal to the receiving terminal of the staff to remind the staff to pay attention to parameters such as the flow rate, pressure, and temperature of the fluid, ensure that they meet the operation requirements of the heat exchanger, and adjust in time if there is any abnormality to avoid the continuous non-compliance of the heat exchange effect; And when the heat exchange effect of the heat exchanger fails to meet the standard for a longer time, specifically, the intermediate shaft 42 drives the linkage screw 52 to rotate synchronously through the bevel gear assembly 53. Through the threaded socket connection between the linkage screw 52 and the trigger plate 55, the trigger plate 55 moves in the prompt shell 51 until the trigger plate 55 presses on the warning switch 54, indicating that it still fails to meet the standard after multiple inspections and adjustments. At this time, the PLC controller also sends a wireless signal to the receiving terminal of the staff, timely reminding the staff that there is a problem with the current heat exchanger, and performing further in-depth processing to avoid the problem that the use effect of the heat exchanger affects the actual production; When it is necessary to replace the heat medium, the PLC controller first controls the pipeline on-off control mechanism 2 on the first heat medium inlet pipe 11 and the first heat medium outlet pipe 13 to act. The servo motor 25 drives the rotating cylinder 22 to rotate within the on-off cylinder 21 through the rotating shaft 24, and then aligns the closed part of the side wall of the rotating cylinder 22 with the first heat medium inlet pipe 11 and the first heat medium outlet pipe 13 to close the first heat medium inlet pipe 11 and the first heat medium outlet pipe 13. Then, it controls the pipeline on-off control mechanism 2 on the second heat medium inlet pipe 12 and the second heat medium outlet pipe 14 to act and open to connect the new heat medium. Before this, the PLC controller adjusts the supply current of the second thrust electromagnetic plate 310 based on the second heat medium temperature sensor 18 on the second heat medium inlet pipe 12, and synchronously controls the electric telescopic rod 67 to push the transmission rack 68 to move, so that the two transmission racks 68 are respectively meshed with the two transmission gears 66. When the temperature of the new heat medium is higher than that of the original heat medium, at this time, the current supplied to the second thrust electromagnetic plate 310 is larger, so that the heat medium temperature feedback seat 35 moves upward relatively. Through the transmission gear 66 outside one of the one-way ratchet assemblies 65 on the extension shaft 64, it meshes with the rear transmission rack 68 for transmission, and then the extension shaft 64 drives the deflection plate 62 to drive the rotating end of the potentiometer 61 to rotate clockwise against the elastic force of the torsion spring 63. Affected by the one-way rotation, the transmission gear 66 outside the other one-way ratchet assembly 65 does not mesh with the front transmission rack 68 for transmission. When the rotating end of the potentiometer 61 rotates clockwise, the resistance value of the potentiometer 61 will increase. Specifically, the greater the temperature difference between the new heat medium and the original heat medium, the greater the distance that the heat medium temperature feedback seat 35 moves upward relatively, the greater the rotation angle of the deflection plate 62 driving the rotating end of the potentiometer 61, and the more the resistance value of the potentiometer 61 increases. And the potentiometer 61 controls the servo motor 25 in the pipeline on-off control mechanism 2 connected in series on the second heat medium inlet pipe 12 and the second heat medium outlet pipe 14 at this time. As a result, the supply current of the servo motor 25 becomes smaller, the rotation speed of the servo motor 25 decreases, and the connection speed of the new heat medium becomes slower. This avoids that when the temperature difference value is large, the dimensional change of the heat exchanger component due to thermal expansion and contraction is more obvious. If the connection speed is too fast and the temperature changes rapidly, the expansion or contraction of each part of the component is inconsistent, which will generate a large thermal stress and then damage the heat exchanger component; Conversely, when the temperature of the new heat medium is lower than that of the original heat medium, the heat medium temperature feedback seat 35 will move downward relatively at this time, so that the transmission gear 66 outside the other one-way ratchet assembly 65 meshes with the front transmission rack 68 for transmission, which also causes the rotating end of the potentiometer 61 to deflect clockwise, also increases the resistance value of the potentiometer 61, and then realizes the automatic regulation of the access speed of the new heat medium to ensure the replacement quality of the heat medium. After the new heat medium is completely accessed, when the pipeline on-off control mechanism 2 on the second heat medium inlet pipe 12 and the second heat medium outlet pipe 14 works in place, the PLC controller controls the electric telescopic rod 67 to drive the transmission rack 68 to move back, so that the transmission rack 68 is disengaged from the transmission gear 66, and under the reset action of the torsion spring 63, the access resistance value of the potentiometer 61 is reset to the initial value, waiting for the next replacement work of the heat medium.

[0025] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An adaptive flow channel plate heat exchanger capable of replacing a heat exchange medium online, comprising a plate heat exchanger body (1), the plate heat exchanger body (1) being provided with a heat medium inlet (7), a heat medium outlet (8), a refrigerant inlet (9), and a refrigerant outlet (10), the heat medium inlet (7) being fixedly connected with a first heat medium inlet pipe (11) and a second heat medium inlet pipe (12), the heat medium outlet (8) being fixedly connected with a first heat medium outlet pipe (13) and a second heat medium outlet pipe (14), the refrigerant inlet (9) being fixedly connected with a refrigerant inlet pipe (15), the refrigerant outlet (10) being fixedly connected with a refrigerant outlet pipe (16), the first heat medium outlet pipe (13) and the second heat medium outlet pipe (14) being respectively provided with a first heat medium temperature sensor (17) and a second heat medium temperature sensor (18), the refrigerant outlet pipe (16) being provided with a refrigerant temperature sensor (19), characterized in that: Also includes: Four pipeline on-off control mechanisms (2), respectively mounted on the first heat medium inlet pipe (11), the second heat medium inlet pipe (12), the first heat medium outlet pipe (13) and the second heat medium outlet pipe (14), for controlling the on-off opening and closing of the pipelines; A heat exchange quality real-time feedback mechanism (3) is mounted on the outer wall of the plate heat exchanger body (1) and is electrically connected to a PLC controller, and the PLC controller supplies power to drive the heat exchange quality real-time feedback mechanism (3) based on temperature signals fed back by the first heat medium temperature sensor (17), the second heat medium temperature sensor (18) and the refrigerant temperature sensor (19); A poor heat exchange quality prompt maintenance mechanism (4) is installed on the outer wall of the plate heat exchanger body (1) and is electrically connected to the PLC controller. The PLC controller controls the start-up action of the poor heat exchange quality prompt maintenance mechanism (4) based on the heat exchange information fed back by the heat exchange quality real-time feedback mechanism (3); A heat exchanger usage status rectification prompting mechanism (5) is mounted on the outer wall of the plate heat exchanger body (1) and is drivingly connected to the poor heat exchange quality prompting and repairing mechanism (4); The heat medium replacement speed automatic control mechanism (6) is installed in the heat exchange quality real-time feedback mechanism (3) and is electrically connected to the pipeline on-off control mechanism (2).

2. The adaptive flow channel plate heat exchanger capable of online replacement of heat exchange medium according to claim 1, characterized in that: The pipeline on-off control mechanism (2) comprises an on-off cylinder (21), the on-off cylinder (21) being connected to a first heat medium inlet pipe (11), a second heat medium inlet pipe (12), a first heat medium outlet pipe (13) and a second heat medium outlet pipe (14); a rotating cylinder (22) is sealed and rotatably sleeved inside the on-off cylinder (21); a through hole (23) is formed on the side wall of the rotating cylinder (22); a rotating shaft (24) is fixedly connected to the center of the upper end of the rotating cylinder (22); and a servo motor (25) for driving the rotating shaft (24) to rotate is fixedly mounted on the upper end of the on-off cylinder (21).

3. The adaptive flow channel plate heat exchanger capable of online replacement of heat exchange medium according to claim 1, characterized in that: The heat exchange quality real-time feedback mechanism (3) comprises a feedback shell (31), the inner wall of the feedback shell (31) is respectively fixedly provided with a plurality of first guide slide bars (32) and second guide slide bars (33) arranged in parallel, the plurality of first guide slide bars (32) are externally slidably sleeved with a same refrigerant temperature feedback seat (34), the plurality of second guide slide bars (33) are externally slidably sleeved with a same heat medium temperature feedback seat (35), the upper ends of the refrigerant temperature feedback seat (34) and the heat medium temperature feedback seat (35) are respectively fixedly connected to the top of the inner wall of the feedback shell (31) with a plurality of compensation springs (36) sleeved outside the first guide slide bars (32) and the second guide slide bars (33), the refrigerant temperature feedback seat (34) and the heat medium temperature feedback seat (35) are respectively fixedly connected to the top of the inner wall of the feedback shell (31), the refrigerant temperature feedback seat (34) and the heat medium temperature feedback seat (35) are respectively sleeved outside the first guide slide bars (32) and the second guide slide bars (33), A first thrust permanent magnet plate (37) is fixedly mounted on the lower end of the refrigerant temperature feedback seat (34); a first thrust electromagnetic plate (38) arranged opposite to the first thrust permanent magnet plate (37) is fixedly mounted on the bottom of the inner wall of the feedback shell (31); a second thrust permanent magnet plate (39) is fixedly mounted on the lower end of the heat medium temperature feedback seat (35); a second thrust electromagnetic plate (310) arranged opposite to the second thrust permanent magnet plate (39) is fixedly mounted on the bottom of the inner wall of the feedback shell (31); a conductive block (311) is fixedly mounted on one end of the refrigerant temperature feedback seat (34); and an electric connection bar (312) arranged corresponding to the position of the conductive block (311) is fixedly mounted on one end of the heat medium temperature feedback seat (35).

4. The adaptive channel plate heat exchanger capable of online replacement of heat exchange medium according to claim 3, characterized in that: The poor heat exchange quality prompt maintenance mechanism (4) comprises a fixed round shell (41), an intermediate shaft (42) is rotatably connected to the center of the inner wall of the fixed round shell (41), a rotating motor (43) for driving the intermediate shaft (42) to rotate is fixedly mounted on the outer wall of the fixed round shell (41), a maintenance switch (44) is fixedly mounted on one side of the inner wall of the fixed round shell (41), an arc-shaped pressing block (45) arranged corresponding to the position of the maintenance switch (44) is fixedly connected to the shaft wall of the intermediate shaft (42), and the conductive block (311) and the electrical connection bar (312) are connected in series to the power supply circuit of the rotating motor (43).

5. The adaptive flow channel plate heat exchanger capable of online replacement of heat exchange medium according to claim 4, characterized in that: The heat exchanger usage status rectification prompt mechanism (5) comprises a prompt housing (51), the inner wall of the prompt housing (51) is rotatably connected to a linkage screw (52), one end of the linkage screw (52) and one end of the intermediate shaft (42) are transmission-connected via a bevel gear assembly (53), a warning switch (54) is fixedly mounted on one side of the inner wall of the prompt housing (51), and a trigger plate (55) arranged opposite to the warning switch (54) is threadedly sleeved on the rod wall of the linkage screw (52).

6. The adaptive channel plate heat exchanger capable of online replacement of heat exchange medium according to claim 3, characterized in that: The heat medium replacement speed automatic control mechanism (6) comprises a potentiometer (61) fixedly mounted on one end of the heat medium temperature feedback seat (35); a deflection plate (62) is fixedly connected to the rotation end of the potentiometer (61); a torsion spring (63) sleeved outside the rotation end of the potentiometer (61) is fixedly connected to the opposite side of the deflection plate (62) and the potentiometer (61); an extension shaft (64) is fixedly connected to the center of a side of the deflection plate (62) away from the potentiometer (61); two one-way ratchet assemblies (65) are mounted outside the shaft wall of the extension shaft (64); a transmission gear (66) is fixedly sleeved on the outer wall of the one-way ratchet assembly (65); two electric telescopic rods (67) are symmetrically fixedly sleeved on the front and rear side walls of the feedback housing (31); and the moving ends of the plurality of electric telescopic rods (67) on the same side are fixedly connected to a transmission rack (68) meshing with the transmission gear (66).

7. The adaptive flow channel plate heat exchanger capable of online replacement of heat exchange medium according to claim 5, characterized in that: The end of the trigger plate (55) is fixedly connected to a limit slider, and the inner wall of the prompt shell (51) is provided with a limit sliding groove that matches and slides with the limit slider.

8. The adaptive flow channel plate heat exchanger capable of online replacement of heat exchange medium according to claim 3, characterized in that: An extension tube (313) for placing an electrical connection strip (312) is integrally connected to the lower end of the feedback housing (31).

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