Energy-saving plate-fin heat exchanger

Abstract

The invention relates to the technical field of heat exchangers, and particularly discloses an energy-saving plate-fin heat exchanger which comprises a box body, a first fin plate group, a second fin plate group, a partition plate and a mounting table, a first edge sealing plate and a second edge sealing plate are arranged on the partition plate, a first driving mechanism is arranged on the first edge sealing plate, a second driving mechanism is arranged on the second edge sealing plate, and the mounting table is arranged on the box body. A waste heat utilization mechanism is arranged in the mounting table; the first driving mechanism can adjust the length of the heated channel, and the second driving mechanism can adjust the length of the heating channel, so that the flow velocity of the heated liquid and the heating liquid is increased, the turbulence degree of the heated liquid can be enhanced by increasing the flow velocity, a thermal boundary layer is destroyed, the heat transfer coefficient is increased, and the heating efficiency is improved. Therefore, the heating effect on the heated liquid is improved, the liquid outlet temperature of the heated liquid can be controlled more accurately, the waste heat utilization mechanism can further utilize waste heat carried by the heating liquid output from the box body, and the energy utilization rate is increased.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchangers, and in particular to an energy-saving plate-fin heat exchanger. Background Art

[0002] Plate-fin heat exchangers are widely used in many industrial and living fields, and their use effect is remarkable. In the chemical, petroleum, electric power and other industries, plate-fin heat exchangers are key equipment for achieving heat transfer, which can effectively improve energy utilization and ensure the stability and efficiency of the production process. For example, in power plants, it helps convert the thermal energy of steam into electrical energy; in the refrigeration industry, it is used for cooling and condensation processes to provide a comfortable indoor environment. In addition, heat exchangers also play an important role in heating, ventilation and air-conditioning systems, meeting people's needs for temperature control by regulating heat transfer.

[0003] The plate-fin heat exchanger in the prior art is usually composed of baffles, fins, seals, guide vanes, etc. These components form a sandwich between two adjacent baffles, called a channel. The heat of the medium on the high temperature side is transferred to the fins on the primary heat transfer surface (baffle), and the fins then transfer the heat along the height direction of their surface and transfer the heat to the medium on the low temperature side by convection.

[0004] Regarding the above-mentioned related technologies, the channel shape of the plate-fin heat exchanger is fixed, so the achievable heat exchange effect cannot be changed according to actual conditions, so the temperature of the heated liquid cannot be accurately controlled according to actual needs, and the heated liquid output by the plate-fin heat exchanger will carry some waste heat, so there is a lot of waste in the utilization of heat, so improvements are made. Summary of the invention

[0005] In order to accurately control the output temperature of the heated liquid after heating according to actual usage conditions, and to utilize part of the waste heat carried by the heated liquid when it is discharged to improve the utilization rate of heat, the present application provides an energy-saving plate-fin heat exchanger.

[0006] The present application provides an energy-saving plate-fin heat exchanger, which adopts the following technical solution: An energy-saving plate-fin heat exchanger comprises a box body, wherein a plurality of groups of first fin plate groups and a plurality of groups of first fin plate groups are alternately arranged in the box body, the first fin plate group and the second fin plate group are arranged perpendicular to each other, a partition is arranged between the first fin plate group and the second fin plate group, the partition is provided with a plurality of groups of first edge sealing plates for sealing the first fin plate group to form a heated channel, and a plurality of groups of second edge sealing plates for sealing the second fin plate group to form a heating channel, a heating liquid inlet and a heating liquid outlet are arranged on the box body, the heating liquid inlet is connected with the heating liquid outlet through the heating channel, and a heated liquid inlet and a heated liquid outlet are also arranged on the box body, the heated liquid inlet and the heated liquid outlet are connected with each other through the heated liquid channel; The first fin plate group includes a plurality of groups of first folding plates and a plurality of groups of second folding plates, the first folding plates and the second folding plates are alternately arranged, the first edge sealing plate is provided with a first driving mechanism for changing the angle between the first folding plates and the second folding plates, the second fin plate group includes a plurality of groups of third folding plates and a plurality of groups of fourth folding plates, and the second edge sealing plate is provided with a second driving mechanism for changing the angle between the third folding plates and the fourth folding plates, and the first driving mechanism is arranged together with the second driving mechanism; A mounting platform is provided below the box body, and a waste heat utilization mechanism is provided in the mounting platform for utilizing waste heat carried by the heated liquid that has undergone heat exchange in the box body to preheat the heated liquid that is about to be input into the box body.

[0007] By adopting the above-mentioned technical scheme, the shapes of the heating channel and the heated channel in the prior art are fixed and cannot be adjusted, so the actual working conditions met are relatively limited. The first driving mechanism in the present application can adjust the angle between the first folding plate and the second folding plate to change the shape of the heated channel, thereby adjusting the flow path of the heated liquid. The second driving mechanism can adjust the angle between the third folding plate and the fourth folding plate to change the shape of the heating liquid channel, thereby adjusting the flow path of the heating liquid.

[0008] When it is necessary to improve the heating efficiency of the heated liquid, the angle between the first folding plate and the second folding plate is reduced by the first driving mechanism to extend the length of the heated channel, while keeping the liquid input speed at the heated liquid inlet unchanged, thereby increasing the flow rate of the heated liquid in the heated channel. Increasing the flow rate can enhance the turbulence of the heated liquid, thereby destroying the thermal boundary layer and increasing the heat transfer coefficient, thereby improving the heating effect of the heated liquid. When it is necessary to further improve the heating efficiency of the heated liquid, the angle between the third folding plate and the fourth folding plate is reduced by the second driving mechanism in the same way, thereby increasing the flow rate of the heated liquid in the heating channel, thereby further improving the heating effect of the heated liquid.

[0009] While maintaining the heating efficiency of the heated liquid unchanged, the present application improves the heat exchange effect by changing the shape of the heated channel and the heating channel, thereby improving the utilization rate of the heat carried by the heated liquid, and can more accurately control the outlet temperature of the heated liquid. The temperature of the heating liquid output from the box is always greater than or equal to the heated liquid. The waste heat utilization mechanism in the present application can further utilize the waste heat carried by the heating liquid output from the box to preheat the heated liquid to be input into the box, thereby further improving the utilization rate of energy.

[0010] Optionally, the first driving mechanism includes a first rotating shaft, a second rotating shaft, a first connecting rod, a second connecting rod and a driving assembly, the first folding plate includes a first rotating plate, a second rotating plate and a passive plate, the first rotating plate and the second rotating plate are socketed and arranged at both ends of the passive plate, the first rotating plate is rotatably connected to the first rotating shaft, the second rotating plate is rotatably connected to the second rotating shaft, the second folding plate is arranged with the first folding plate, the first connecting rod is used to connect multiple groups of the first rotating shafts into a whole, the second connecting rod is used to connect multiple groups of the second rotating shafts into a whole, and the driving assembly is used to move the first rotating shaft and the second rotating shaft in opposite directions.

[0011] By adopting the above technical solution, the driving assembly can drive the first connecting rod and the second connecting rod to move in opposite directions. Since the first rotating shaft and the second rotating shaft are respectively arranged on the first connecting rod and the second connecting rod, the angle between the first folding plate and the second folding plate can be adjusted. At this time, the first rotating plate and the second rotating plate will extend or retract from the passive plate. When the angle between the first folding plate and the second folding plate changes, the shape of the heated channel can be adjusted. Similarly, the shape of the heating channel can be adjusted.

[0012] Optionally, the driving assembly includes a first electric telescopic rod, a second electric telescopic rod, a first push plate and a second push plate, the first push plate being slidably arranged in the first edge sealing plate, the first connecting rod being arranged on the first push plate, the first electric telescopic rod being arranged on the box body, and the telescopic end passing through the box body and being connected to the first push plate, the second push plate being slidably arranged in the first edge sealing plate away from the first electric telescopic rod, and the first push plate and the second push plate being symmetrically arranged, the second connecting rod being arranged on the second push plate, the second electric telescopic rod being symmetrically arranged with the first electric telescopic rod, and the telescopic end passing through the box body and being connected to the second push plate.

[0013] By adopting the above technical solution, the first electric telescopic rod and the second electric telescopic rod are started to shorten the ends of the first electric telescopic rod and the second electric telescopic rod, so that the first pushing plate and the second pushing plate can be moved away from each other, thereby driving the first rotating shaft on the first connecting rod and the second rotating shaft on the second connecting rod to move away from each other, thereby reducing the angle between the first folding plate and the second folding plate and extending the length of the heated channel. The ends of the first electric telescopic rod and the second electric telescopic rod are extended, so that the first pushing plate and the second pushing plate can be brought closer to each other, thereby driving the first rotating shaft on the first connecting rod and the second rotating shaft on the second connecting rod to move closer to each other, thereby increasing the angle between the first folding plate and the second folding plate and shortening the length of the heated channel. Similarly, the length of the heating channel can be shortened or extended.

[0014] Optionally, the waste heat utilization mechanism includes a liquid outlet pipe and a liquid inlet pipe, the liquid inlet pipe is arranged on the heated liquid inlet, the liquid outlet pipe is arranged on the heated liquid outlet, the liquid outlet pipe is arranged in a circuitous manner in the mounting platform, the liquid inlet pipe is spirally arranged in the mounting platform, and the mounting platform is filled with phase change material.

[0015] By adopting the above technical scheme, the heating liquid with waste heat output from the heating liquid outlet enters the liquid outlet pipe, and heats the phase change material in the mounting platform. The heated phase change material can preheat the heated liquid in the liquid inlet pipe that is about to be input into the box body, thereby improving the utilization rate of energy and the heating efficiency of the heated liquid. The liquid outlet pipe is circuitously arranged in the mounting platform, and the liquid inlet pipe is spirally arranged in the mounting platform, which can increase the contact area between the liquid outlet pipe and the liquid inlet pipe and the phase change material respectively, and further improve the utilization rate of the waste heat of the heated liquid.

[0016] Optionally, the liquid outlet pipe is circuitously arranged in two layers, and the liquid inlet pipe is arranged between the two layers of the liquid outlet pipe.

[0017] By adopting the above technical solution, the liquid outlet pipe is circuitously arranged in the mounting platform, and the liquid inlet pipe is spirally arranged in the mounting platform, which can facilitate the transfer of waste heat in the liquid outlet pipe to the liquid inlet pipe, thereby improving the effect of utilizing the waste heat.

[0018] Optionally, a first temperature sensor is provided on the heated liquid outlet, and a second temperature sensor is provided on the heated liquid outlet, and the first temperature sensor and the second temperature sensor are both electrically connected to the first electric telescopic rod and the second temperature sensor.

[0019] By adopting the above technical solution, when the first temperature sensor detects that the temperature of the heated liquid is lower than the set temperature, and the second temperature sensor detects that the residual heat temperature of the heating liquid is higher than the set temperature, the telescopic ends of the first telescopic rod and the second telescopic rod can be automatically shortened through electrical connection, thereby extending the lengths of the heating channel and the heated channel. Therefore, real-time heat exchange balance can be achieved in cooperation with the residual heat utilization mechanism, thereby improving the utilization rate of heat.

[0020] Optionally, a first electric valve is provided on the heated liquid inlet, and a second electric valve is provided on the heating liquid inlet, and the first electric valve and the second electric valve are both electrically connected to the first temperature sensor and the second temperature sensor.

[0021] By adopting the above technical scheme, when the lengths of the heating channel and the heated channel are both maximum, and the first temperature sensor still detects that the temperature of the heated liquid output from the heated liquid outlet still does not meet the setting requirements, and the second temperature sensor detects that the temperature of the heated liquid output from the heating liquid outlet also does not meet the setting requirements, the first temperature sensor will reduce the amount of heated liquid input into the heated liquid inlet through the first electric valve, and the second temperature sensor will increase the amount of heated liquid input into the heating liquid inlet through the second electric valve until a real-time heat exchange balance is achieved in cooperation with the waste heat utilization mechanism. When the lengths of the heating channel and the heated channel are both minimum, and the first temperature sensor detects that the temperature of the heated liquid output from the heated liquid outlet is higher than the setting requirements, and the second temperature sensor detects that the temperature of the heated liquid output from the heating liquid outlet is also higher than the setting requirements, the first temperature sensor will increase the amount of heated liquid input into the heated liquid inlet through the first electric valve, and the second temperature sensor will reduce the amount of heated liquid input into the heating liquid inlet through the second electric valve until a real-time heat exchange balance is achieved in cooperation with the waste heat utilization mechanism.

[0022] Optionally, a mounting frame is provided on the telescopic end of the first electric telescopic rod, and a plurality of groups of mounting columns are provided on a surface of the mounting frame away from the first electric telescopic rod, and the plurality of groups of mounting columns all penetrate the first edge sealing plate and are connected to the plurality of groups of the first pushing plates, and the second electric telescopic rod is arranged together with the first electric telescopic rod.

[0023] By adopting the above technical solution, multiple mounting columns mount multiple first push plates on the mounting frame, so only one electric telescopic rod is needed to adjust the positions of the multiple first push plates, thereby reducing the cost required for device production.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. When it is necessary to improve the heating efficiency of the heated liquid, the angle between the first folded plate and the second folded plate is reduced by the first driving mechanism to extend the length of the heated channel, and at the same time, the liquid input speed of the heated liquid inlet is kept unchanged, thereby increasing the flow rate of the heated liquid in the heated channel. Increasing the flow rate can enhance the turbulence of the heated liquid, thereby destroying the thermal boundary layer and improving the heat transfer coefficient, thereby improving the heating effect of the heated liquid. When it is necessary to further improve the heating efficiency of the heated liquid, similarly, the angle between the third folded plate and the fourth folded plate is reduced by the second driving mechanism to increase the flow rate of the heated liquid in the heating channel, thereby further improving the heating effect of the heated liquid; 2. While maintaining the heating efficiency of the heated liquid unchanged, the present application improves the heat exchange effect by changing the shapes of the heated channel and the heating channel, thereby improving the utilization rate of the heat carried by the heated liquid, and can more accurately control the outlet temperature of the heated liquid. The temperature of the heated liquid output from the box is always greater than or equal to that of the heated liquid. The waste heat utilization mechanism in the present application can further utilize the waste heat carried by the heated liquid output from the box to preheat the heated liquid to be input into the box, thereby further improving the utilization rate of energy. 3. When the first temperature sensor detects that the temperature of the heated liquid is lower than the set temperature, and the second temperature sensor detects that the residual heat temperature of the heated liquid is higher than the set temperature, the telescopic ends of the first telescopic rod and the second telescopic rod can be automatically shortened through electrical connection to extend the length of the heating channel and the heated channel, thereby improving the utilization rate of heat. When the first sensor detects that the temperature of the heated liquid is much higher than the set temperature, and the second temperature sensor detects that the residual heat temperature of the heated liquid is much higher than the set temperature, the telescopic ends of the first telescopic rod and the second telescopic rod can be automatically extended through electrical connection to shorten the length of the heating channel and the heated channel, thereby making the temperature of the heated liquid meet the requirements; 4. When the lengths of the heating channel and the heated channel are both maximum, and the first temperature sensor still detects that the temperature of the heated liquid output from the heated liquid outlet still does not meet the set requirements, and the second temperature sensor detects that the temperature of the heated liquid output from the heating liquid outlet also does not meet the set requirements, the first temperature sensor will reduce the amount of heated liquid input into the heated liquid inlet through the first electric valve, and the second temperature sensor will increase the amount of heated liquid input into the heating liquid inlet through the second electric valve until heat exchange balance is reached in real time. When the lengths of the heating channel and the heated channel are both minimum, and the first temperature sensor detects that the temperature of the heated liquid output from the heated liquid outlet is higher than the set requirements, and the second temperature sensor detects that the temperature of the heated liquid output from the heating liquid outlet is also higher than the set requirements, the first temperature sensor will increase the amount of heated liquid input into the heated liquid inlet through the first electric valve, and the second temperature sensor will reduce the amount of heated liquid input into the heating liquid inlet through the second electric valve until heat exchange balance is reached in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 yes Figure 1 A schematic diagram of a partial structural cross section; Figure 3 yes Figure 2 Schematic diagram of the structure of part A; Figure 4 yes Figure 1 Schematic diagram of some structures; 1. The fin plate assembly includes: 1. a first fin plate assembly; 12. a first rotating plate; 121. a second rotating plate; 122. a passive plate; 13. a first edge plate; 131. a heated channel; 14. a second edge plate; 141. a heating channel; 15. a heating liquid inlet; 16. a heating liquid outlet; 17. a heated liquid inlet; 18. a heated liquid outlet; 19. a mounting table; 2. a first driving mechanism; 21. a first rotating shaft; 22. a second rotating shaft; 23. a first connecting rod; 24. a second connecting rod; 25. a driving assembly; 251. a first electric telescopic rod; 252. a second electric telescopic rod; 253. a first pushing plate; 254. a second pushing plate; 3. a waste heat utilization mechanism; 31. a liquid outlet pipe; 32. a liquid inlet pipe; 4. a first temperature sensor; 5. a second temperature sensor; 6. a first electric valve; 7. a second electric valve; 8. a mounting bracket; 81. a mounting column. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-4 This application is described in further detail.

[0028] The present application discloses an energy-saving plate-fin heat exchanger. Figure 1 , Figure 2 , Figure 3 and Figure 4 , an energy-saving plate-fin heat exchanger, comprising a box body 1, in which a plurality of groups of first fin plate groups 11 and a plurality of groups of first fin plate groups 11 are alternately arranged, the first fin plate group 11 and the second fin plate group are arranged perpendicular to each other, a partition is arranged between the first fin plate group 11 and the second fin plate group, a plurality of groups of first edge sealing plates 13 for sealing the first fin plate group 11 to form a heated channel 131 are arranged on the partition, and a plurality of groups of second edge sealing plates 14 for sealing the second fin plate group to form a heating channel 141 are arranged, a heating liquid inlet 15 and a heating liquid outlet 16 are arranged on the box body 1, and the heating liquid inlet 15 is connected with the heating liquid outlet 16 through the heating channel 141, and a heated liquid inlet 17 and a heated liquid outlet 18 are also arranged on the box body 1, and the heated liquid inlet 17 and the heated liquid outlet 18 are connected through the heated liquid channel.

[0029] The first fin plate group 11 includes multiple groups of first folding plates and multiple groups of second folding plates, and the first folding plates and the second folding plates are alternately arranged. The first driving mechanism 2 is arranged on the first edge sealing plate 13. The second fin plate group includes multiple groups of third folding plates and multiple groups of fourth folding plates, and the second driving mechanism is arranged on the second edge sealing plate 14. The first driving mechanism 2 is arranged together with the second driving mechanism. A mounting platform 19 is arranged under the box body 1, and a waste heat utilization mechanism 3 is arranged in the mounting platform 19.

[0030] In the prior art, the shapes of the heating channel 141 and the heated channel 131 are fixed and cannot be adjusted, so the actual working conditions they meet are relatively limited. In this embodiment, the first driving mechanism 2 can adjust the angle between the first folding plate and the second folding plate to change the shape of the heated channel 131, thereby adjusting the flow path of the heated liquid. The second driving mechanism can adjust the angle between the third folding plate and the fourth folding plate to change the shape of the heating liquid channel, thereby adjusting the flow path of the heated liquid.

[0031] When it is necessary to improve the heating efficiency of the heated liquid, the angle between the first folding plate and the second folding plate is reduced by the first driving mechanism 2, the length of the heated channel 131 is extended, and at the same time the liquid input speed of the heated liquid inlet 17 is kept unchanged, thereby increasing the flow rate of the heated liquid in the heated channel 131. Increasing the flow rate can enhance the turbulence of the heated liquid, thereby destroying the thermal boundary layer and improving the heat transfer coefficient, thereby improving the heating effect of the heated liquid. When it is necessary to further improve the heating efficiency of the heated liquid, similarly, the angle between the third folding plate and the fourth folding plate is reduced by the second driving mechanism, and the flow rate of the heated liquid in the heating channel 141 is increased, thereby further improving the heating effect of the heated liquid.

[0032] While maintaining the heating efficiency of the heated liquid unchanged, this embodiment improves the heat exchange effect by changing the shapes of the heated channel 131 and the heating channel 141, thereby improving the utilization rate of the heat carried by the heated liquid and more accurately controlling the outlet temperature of the heated liquid. The temperature of the heated liquid output from the box body 1 is always greater than or equal to the heated liquid. The waste heat utilization mechanism 3 in this embodiment can further utilize the waste heat carried by the heating liquid output from the box body 1 to preheat the heated liquid to be input into the box body 1, thereby further improving the utilization rate of energy.

[0033] The first driving mechanism 2 includes a first rotating shaft 21, a second rotating shaft 22, a first connecting rod 23, a second connecting rod 24 and a driving assembly 25. The first folding plate includes a first rotating plate 12, a second rotating plate 121 and a passive plate 122. The first rotating plate 12 and the second rotating plate 121 are socketed and arranged at both ends of the passive plate 122. The first rotating plate 12 is rotatably connected to the first rotating shaft 21, the second rotating plate 121 is rotatably connected to the second rotating shaft 22, the second folding plate is arranged with the first folding plate, the first connecting rod 23 is used to connect multiple groups of first rotating shafts 21 into a whole, the second connecting rod 24 is used to connect multiple groups of second rotating shafts 22 into a whole, and the driving assembly 25 is used to move the first rotating shaft 21 and the second rotating shaft 22 in opposite directions.

[0034] The driving assembly 25 can drive the first connecting rod 23 and the second connecting rod 24 to move in opposite directions. Since the first rotating shaft 21 and the second rotating shaft 22 are respectively arranged on the first connecting rod 23 and the second connecting rod 24, the angle between the first folding plate and the second folding plate can be adjusted. At this time, the first rotating plate 12 and the second rotating plate 121 will extend or retract from the passive plate 122. When the angle between the first folding plate and the second folding plate changes, the shape of the heated channel 131 can be adjusted, and similarly, the shape of the heating channel 141 can be adjusted.

[0035] The driving assembly 25 includes a first electric telescopic rod 251, a second electric telescopic rod 252, a first push plate 253 and a second push plate 254. The first push plate 253 is slidably arranged in the first edge sealing plate 13, the first connecting rod 23 is arranged on the first push plate 253, the first electric telescopic rod 251 is arranged on the box body 1, and the telescopic end passes through the box body 1 and is connected to the first push plate 253, the second push plate 254 is slidably arranged in the first edge sealing plate 13 away from the first electric telescopic rod 251, and the first push plate 253 and the second push plate 254 are symmetrically arranged, the second connecting rod 24 is arranged on the second push plate 254, the second electric telescopic rod 252 is symmetrically arranged with the first electric telescopic rod 251, and the telescopic end passes through the box body 1 and is connected to the second push plate 254.

[0036] By starting the first electric telescopic rod 251 and the second electric telescopic rod 252, the ends of the first electric telescopic rod 251 and the second electric telescopic rod 252 are shortened, so that the first push plate 253 and the second push plate 254 can be moved away from each other, thereby driving the first rotating shaft 21 on the first connecting rod 23 and the second rotating shaft 22 on the second connecting rod 24 to move away from each other, thereby reducing the angle between the first folding plate and the second folding plate, and extending the length of the heated channel 131. By extending the ends of the first electric telescopic rod 251 and the second electric telescopic rod 252, the first push plate 253 and the second push plate 254 can be brought closer to each other, thereby driving the first rotating shaft 21 on the first connecting rod 23 and the second rotating shaft 22 on the second connecting rod 24 to move closer to each other, thereby increasing the angle between the first folding plate and the second folding plate, and shortening the length of the heated channel 131. Similarly, the length of the heating channel 141 can be shortened or extended.

[0037] The waste heat utilization mechanism 3 includes a liquid outlet pipe 31 and a liquid inlet pipe 32. The liquid inlet pipe 32 is arranged on the heated liquid inlet 17, and the liquid outlet pipe 31 is arranged on the heated liquid outlet 16. The liquid outlet pipe 31 is arranged in a circuitous manner in the mounting platform 19, and the liquid inlet pipe 32 is spirally arranged in the mounting platform 19. The mounting platform 19 is filled with phase change material. The liquid outlet pipe 31 is arranged in two layers in a circuitous manner, and the liquid inlet pipe 32 is arranged between the two layers of the liquid outlet pipe 31.

[0038] After the heated liquid with residual heat outputted from the heating liquid outlet 16 enters the liquid outlet pipe 31, the phase change material in the mounting platform 19 is heated. The heated phase change material can preheat the heated liquid in the liquid inlet pipe 32 that is about to be input into the box body 1, thereby improving the utilization rate of energy and the heating efficiency of the heated liquid. The liquid outlet pipe 31 is arranged in a circuitous manner in the mounting platform 19, and the liquid inlet pipe 32 is arranged in a spiral manner in the mounting platform 19, which can increase the contact area between the liquid outlet pipe 31 and the liquid inlet pipe 32 and the phase change material, respectively, and further improve the utilization rate of the residual heat of the heated liquid. The liquid outlet pipe 31 is arranged in a circuitous manner in the mounting platform 19, and the liquid inlet pipe 32 is arranged in a spiral manner in the mounting platform 19, which can facilitate the transfer of the residual heat in the liquid outlet pipe 31 to the liquid inlet pipe 32, thereby improving the effect of utilizing the residual heat.

[0039] A first temperature sensor 4 is provided on the heated liquid outlet 18, and a second temperature sensor 5 is provided on the heated liquid outlet 16. The first temperature sensor 4 and the second temperature sensor 5 are both electrically connected to the first electric telescopic rod 251 and the second temperature sensor 5. A first electric valve 6 is provided on the heated liquid inlet 17, and a second electric valve 7 is provided on the heated liquid inlet 15. The first electric valve 6 and the second electric valve 7 are both electrically connected to the first temperature sensor 4 and the second temperature sensor 5.

[0040] When the first temperature sensor 4 detects that the temperature of the heated liquid is lower than the set temperature, and the second temperature sensor 5 detects that the residual heat temperature of the heating liquid is higher than the set temperature, the telescopic ends of the first telescopic rod and the second telescopic rod can be automatically shortened through electrical connection, thereby extending the lengths of the heating channel 141 and the heated channel 131. Therefore, real-time heat exchange balance can be achieved in cooperation with the residual heat utilization mechanism 3, thereby improving the utilization rate of heat.

[0041] When the lengths of the heating channel 141 and the heated channel 131 are both maximum, and the first temperature sensor 4 still detects that the heated liquid temperature output by the heated liquid outlet 18 still does not meet the setting requirements, and the second temperature sensor 5 detects that the heated liquid temperature output by the heating liquid outlet 16 also does not meet the setting requirements, the first temperature sensor 4 will reduce the amount of heated liquid input by the heated liquid inlet 17 through the first electric valve 6, and the second temperature sensor 5 will increase the amount of heated liquid input by the heating liquid inlet 15 through the second electric valve 7 until the real-time heat exchange balance is achieved in cooperation with the waste heat utilization mechanism 3. When the lengths of the heating channel 141 and the heated channel 131 are both minimum, and the first temperature sensor 4 detects that the heated liquid temperature output by the heated liquid outlet 18 is higher than the setting requirements, and the second temperature sensor 5 detects that the heated liquid temperature output by the heating liquid outlet 16 is also higher than the setting requirements, the first temperature sensor 4 will increase the amount of heated liquid input by the heated liquid inlet 17 through the first electric valve 6, and the second temperature sensor 5 will reduce the amount of heated liquid input by the heating liquid inlet 15 through the second electric valve 7 until the real-time heat exchange balance is achieved in cooperation with the waste heat utilization mechanism 3.

[0042] A mounting frame 8 is provided on the telescopic end of the first electric telescopic rod 251, and a plurality of mounting columns 81 are provided on a surface of the mounting frame 8 away from the first electric telescopic rod 251. The plurality of mounting columns 81 all penetrate the first edge sealing plate 13 and are connected to the plurality of first push plates 253. The second electric telescopic rod 252 is provided with the first electric telescopic rod 251. The plurality of mounting columns 81 mount the plurality of first push plates 253 on the mounting frame 8, so that only one electric telescopic rod is needed to adjust the positions of the plurality of first push plates 253, thereby reducing the cost required for the production of the device.

[0043] The implementation principle of an energy-saving plate-fin heat exchanger in the embodiment of the present application is: When it is necessary to precisely control the outlet temperature of the heated liquid, the first electric telescopic rod 251 and the second electric telescopic rod 252 are started to shorten the ends of the first electric telescopic rod 251 and the second electric telescopic rod 252, driving the first rotating shaft 21 on the first connecting rod 23 and the second rotating shaft 22 on the second connecting rod 24 to move away from each other, the angle between the first folding plate and the second folding plate becomes smaller, the length of the heated channel 131 increases, and the ends of the first electric telescopic rod 251 and the second electric telescopic rod 252 are extended, that is, the first rotating shaft 21 on the first connecting rod 23 and the second rotating shaft 22 on the second connecting rod 24 move toward each other, the angle between the first folding plate and the second folding plate increases, and the length of the heated channel 131 is shortened. Similarly, the length of the heating channel 141 can be shortened or extended. The lengthening of the heated channels 131 and 141 can increase the flow rate and enhance the turbulence of the heated liquid, thereby destroying the thermal boundary layer and improving the heat transfer coefficient. The outlet temperature of the heated liquid is precisely controlled by changing the heat transfer coefficient.

[0044] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate the existence of at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0045] The above are all optional embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An energy-saving plate-fin heat exchanger, comprising a housing (1), characterized in that: A plurality of groups of first fin plate groups (11) and a plurality of groups of second fin plate groups are alternately arranged in the box body (1), the first fin plate group (11) and the second fin plate group are arranged perpendicular to each other, a partition is arranged between the first fin plate group (11) and the second fin plate group, the partition is provided with a plurality of groups of first edge sealing plates (13) for sealing the first fin plate group (11) to form a heated channel (131), and a plurality of groups of second edge sealing plates (14) for sealing the second fin plate group to form a heating channel (141), a heating liquid inlet (15) and a heating liquid outlet (16) are arranged on the box body (1), the heating liquid inlet (15) is connected to the heating liquid outlet (16) through the heating channel (141), and a heated liquid inlet (17) and a heated liquid outlet (18) are also arranged on the box body (1), the heated liquid inlet (17) and the heated liquid outlet (18) are connected through the heated liquid channel; The first fin plate group (11) comprises a plurality of groups of first folding plates and a plurality of groups of second folding plates, the first folding plates and the second folding plates are alternately arranged, the first edge sealing plate (13) is provided with a first driving mechanism (2) for changing the angle between the first folding plates and the second folding plates, the second fin plate group comprises a plurality of groups of third folding plates and a plurality of groups of fourth folding plates, and the second edge sealing plate (14) is provided with a second driving mechanism for changing the angle between the third folding plates and the fourth folding plates, and the first driving mechanism (2) is arranged together with the second driving mechanism; A mounting platform (19) is provided below the box body (1), and a waste heat utilization mechanism (3) is provided in the mounting platform (19) for utilizing waste heat carried by the heated liquid that has undergone heat exchange in the box body (1) to preheat the heated liquid to be input into the box body (1).

2. An energy-saving plate-fin heat exchanger according to claim 1, characterized in that: The first driving mechanism (2) comprises a first rotating shaft (21), a second rotating shaft (22), a first connecting rod (23), a second connecting rod (24) and a driving assembly (25); the first folding plate comprises a first rotating plate (12), a second rotating plate (121) and a passive plate (122); the first rotating plate (12) and the second rotating plate (121) are arranged at two ends of the passive plate (122) in a socket-shaped manner; the first rotating plate (12) is rotatably connected to the first rotating shaft (21); the second rotating plate (121) is rotatably connected to the second rotating shaft (22); the second folding plate is arranged with the first folding plate; the first connecting rod (23) is used to connect multiple groups of the first rotating shafts (21) into a whole; the second connecting rod (24) is used to connect multiple groups of the second rotating shafts (22) into a whole; and the driving assembly (25) is used to move the first rotating shaft (21) and the second rotating shaft (22) in opposite directions.

3. An energy-saving plate-fin heat exchanger according to claim 2, characterized in that: The driving assembly (25) comprises a first electric telescopic rod (251), a second electric telescopic rod (252), a first push plate (253) and a second push plate (254); the first push plate (253) is slidably arranged in the first edge sealing plate (13); the first connecting rod (23) is arranged on the first push plate (253); the first electric telescopic rod (251) is arranged on the box body (1), and the telescopic end thereof passes through the box body (1) and is connected to the first push plate (253); the second push plate (254) is slidably arranged in the first edge sealing plate (13) away from the first electric telescopic rod (251), and the first push plate (253) and the second push plate (254) are symmetrically arranged; the second connecting rod (24) is arranged on the second push plate (254); the second electric telescopic rod (252) is symmetrically arranged with the first electric telescopic rod (251), and the telescopic end thereof passes through the box body (1) and is connected to the second push plate (254).

4. The energy-saving plate-fin heat exchanger according to claim 1, characterized in that: The waste heat utilization mechanism (3) comprises a liquid outlet pipe (31) and a liquid inlet pipe (32); the liquid inlet pipe (32) is arranged on the heated liquid inlet (17); the liquid outlet pipe (31) is arranged on the heated liquid outlet (16); the liquid outlet pipe (31) is arranged in a circuitous manner in the mounting platform (19); the liquid inlet pipe (32) is arranged in a spiral manner in the mounting platform (19); and the mounting platform (19) is filled with a phase change material.

5. The energy-saving plate-fin heat exchanger according to claim 4, characterized in that: The liquid outlet pipe (31) is arranged in two layers in a circuitous manner, and the liquid inlet pipe (32) is arranged between the two layers of the liquid outlet pipe (31).

6. The energy-saving plate-fin heat exchanger according to claim 3, characterized in that: The heated liquid outlet (18) is provided with a first temperature sensor (4), and the heated liquid outlet (16) is provided with a second temperature sensor (5); the first temperature sensor (4) and the second temperature sensor (5) are both electrically connected to the first electric telescopic rod (251) and the second temperature sensor (5).

7. An energy-saving plate-fin heat exchanger according to claim 6, characterized in that: The heated liquid outlet (18) is provided with a first electric valve (6), and the heated liquid outlet (16) is provided with a second electric valve (7), and the first electric valve (6) and the second electric valve (7) are both electrically connected to the first temperature sensor (4) and the second temperature sensor (5).

8. The energy-saving plate-fin heat exchanger according to claim 3, characterized in that: A mounting frame (8) is provided on the telescopic end of the first electric telescopic rod (251); a plurality of mounting columns (81) are provided on a surface of the mounting frame (8) away from the first electric telescopic rod (251); the plurality of mounting columns (81) all penetrate the first edge sealing plate (13) and are connected to the plurality of first push plates (253); and the second electric telescopic rod (252) is provided together with the first electric telescopic rod (251).

Images