Energy-saving plate-fin heat exchanger

Abstract

The application 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, the partition plate is provided with a first sealing edge plate and a second sealing edge plate, the first sealing edge plate is provided with a first driving mechanism, the second sealing edge plate is provided with a second driving mechanism, and the mounting table is provided with a waste heat utilization mechanism; the first driving mechanism can adjust the length of a heated channel, and the second driving mechanism can adjust the length of a heating channel, so that the flow rates of the heated liquid and the heating liquid are improved, the turbulence degree of the heated liquid is enhanced, the thermal boundary layer is destroyed, the heat transfer coefficient is improved, the heating effect on the heated liquid is improved, the outlet temperature of the heated liquid can be more accurately controlled, and the waste heat utilization mechanism can further utilize the waste heat carried by the heating liquid output from the box body, so that the utilization rate of energy is improved.

Description

TECHNICAL FIELD

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

[0002] Plate-fin heat exchangers are widely used in various industrial and domestic fields, and their use effect is remarkable. In the chemical, petroleum, power and other industries, plate-fin heat exchangers are key equipment for 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 to convert the heat 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, and meet people's demand for temperature control by adjusting heat transfer.

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

[0004] For the related technology in the above, the channel shape of the plate-fin heat exchanger is fixed, so the heat exchange effect that can be achieved cannot be changed according to the actual situation, so the temperature of the heated liquid cannot be accurately controlled according to the actual demand, and the heated liquid output by the plate-fin heat exchanger carries part of the residual heat, so there is a lot of waste in the use of heat, so it needs to be improved. SUMMARY

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

[0006] The energy-saving plate-fin heat exchanger provided by the present application adopts the following technical scheme:

[0007] The energy-saving plate-fin heat exchanger comprises a box body, a plurality of first fin plate groups and a plurality of second fin plate groups are alternately arranged in the box body, the first fin plate group and the second fin plate group are arranged perpendicularly to each other, a plurality of first edge sealing plates for sealing edges of the first fin plate group to form heated channels and a plurality of second edge sealing plates for sealing edges of the second fin plate group to form heated channels are arranged on a partition plate between the first fin plate group and the second fin plate group, a heating liquid inlet and a heating liquid outlet are arranged on the box body, the heating liquid inlet is communicated with the heating liquid outlet through the heated channel, and a heated liquid inlet and a heated liquid outlet are further arranged on the box body and communicated through a heated liquid channel.

[0008] The first fin plate group comprises a plurality of first folded plates and a plurality of second folded plates, the first folded plate and the second folded plate are alternately arranged, the first edge sealing plate is provided with a first driving mechanism for changing the angle between the first folded plate and the second folded plate, the second fin plate group comprises a plurality of third folded plates and a plurality of fourth folded plates, and the second edge sealing plate is provided with a second driving mechanism for changing the angle between the third folded plate and the fourth folded plate, and the first driving mechanism is arranged with the second driving mechanism.

[0009] A mounting table is arranged below the box body, and a waste heat utilization mechanism for preheating the heated liquid to be input into the box body by using the waste heat carried by the heating liquid which has been heat-exchanged in the box body.

[0010] By adopting the above technical scheme, the shape of the heated channel and the heated channel in the prior art is fixed and cannot be adjusted, so that the actual working conditions are limited, and the first driving mechanism in the present application can adjust the angle between the first folded plate and the second folded plate to change the shape of the heated channel, so as to adjust the flow path of the heated liquid, and the second driving mechanism can adjust the angle between the third folded plate and the fourth folded plate to change the shape of the heated liquid channel, so as to adjust the flow path of the heated liquid.

[0011] When it is needed 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, the length of the heated channel is extended, and the liquid input speed of the heated liquid inlet is kept unchanged, so as to improve the flow rate of the heated liquid in the heated channel, and the flow rate can enhance the turbulence degree of the heated liquid, so as to destroy the thermal boundary layer and improve the heat transfer coefficient, so as to improve the heating effect of the heated liquid. When it is needed 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, the flow rate of the heated liquid in the heated channel is improved, and the heating effect of the heated liquid is further improved.

[0012] The application can improve the heat exchange effect by changing the shape of the heated channel and the heating channel while keeping the heating efficiency of the heated liquid unchanged, improve the utilization rate of the heat carried by the heated liquid, and more accurately control the outlet temperature of the heated liquid. The temperature of the heated liquid in the output tank is always greater than or equal to the heated liquid. The waste heat utilization mechanism in the application can further utilize the waste heat carried by the heated liquid in the output tank to preheat the heated liquid about to be input into the tank, thereby further improving the utilization rate of energy.

[0013] Optionally, the first driving mechanism comprises a first rotating shaft, a second rotating shaft, a first connecting rod, a second connecting rod and a driving assembly. The first folding plate comprises a first rotating plate, a second rotating plate and a passive plate. The first rotating plate and the second rotating plate are inserted into the two ends of the passive plate. The first rotating plate is rotationally connected with the first rotating shaft, and the second rotating plate is rotationally connected with the second rotating shaft. The second folding plate is arranged with the first folding plate. The first connecting rod is used to connect a plurality of first rotating shafts into one whole. The second connecting rod is used to connect a plurality of second rotating shafts into one whole. The driving assembly is used to move the first rotating shaft and the second rotating shaft in opposite directions.

[0014] By adopting the above technical scheme, 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 arranged on the first connecting rod and the second connecting rod respectively, 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 stretch out 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.

[0015] Optionally, the driving assembly comprises a first electric telescopic rod, a second electric telescopic rod, a first push plate and a second push plate, the first push plate is slidingly arranged in the first edge plate, the first connecting rod is arranged on the first push plate, the first electric telescopic rod is arranged on the box body and connected with the first push plate through the telescopic end penetrating the box body, the second push plate is slidingly arranged in the first edge plate away from the first electric telescopic rod, and the first push plate and the second push plate are symmetrically arranged, the second connecting rod is arranged on the second push plate, and the second electric telescopic rod is symmetrically arranged with the first electric telescopic rod and connected with the second push plate through the telescopic end penetrating the box body.

[0016] By adopting the above technical scheme, the first electric telescopic rod and the second electric telescopic rod are started, the ends of the first electric telescopic rod and the second electric telescopic rod are shortened, the first push plate and the second push plate are moved away from each other, the first shaft on the first connecting rod and the second shaft on the second connecting rod are moved away from each other, the angle between the first folding plate and the second folding plate is reduced, the length of the heated channel is extended, the ends of the first electric telescopic rod and the second electric telescopic rod are lengthened, the first push plate and the second push plate are moved close to each other, the first shaft on the first connecting rod and the second shaft on the second connecting rod are moved close to each other, the angle between the first folding plate and the second folding plate is increased, and the length of the heated channel is shortened. The length of the heated channel can be shortened or lengthened in the same way.

[0017] Optionally, the waste heat utilization mechanism comprises an outlet pipe and an inlet pipe, the inlet pipe is arranged on the heated liquid inlet, the outlet pipe is arranged on the heated liquid outlet, the outlet pipe is arranged in the installation table in a meandering manner, the inlet pipe is arranged in the installation table in a spiral manner, and the installation table is filled with a phase change material.

[0018] By adopting the above technical scheme, the heated liquid with waste heat output by the heated liquid outlet enters the outlet pipe, the phase change material in the installation table is heated, the phase change material after heating can preheat the heated liquid about to be input into the box body in the inlet pipe, thereby improving the utilization rate of energy and the heating efficiency of the heated liquid. The outlet pipe is arranged in the installation table in a meandering manner, and the inlet pipe is arranged in the installation table in a spiral manner, which can increase the contact area of the outlet pipe and the inlet pipe with the phase change material, and further improve the waste heat utilization rate of the heated liquid.

[0019] Optionally, the outlet pipe is arranged in two layers, and the inlet pipe is arranged between the two layers of the outlet pipe.

[0020] By adopting the technical scheme, the liquid outlet pipe is arranged in the mounting table in a meandering manner, and the liquid inlet pipe is arranged in the mounting table in a spiral manner, so that the waste heat in the liquid outlet pipe can be transferred to the liquid inlet pipe, and the utilization effect of the waste heat is improved.

[0021] Optionally, the heated liquid outlet is provided with a first temperature sensor, and the heating liquid outlet is provided with a second temperature sensor, and the first temperature sensor and the second temperature sensor are electrically connected with the first electric telescopic rod and the second temperature sensor.

[0022] By adopting the technical scheme, 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 waste 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 the electrical connection, and the lengths of the heating channel and the heated channel are extended, so that the real-time heat exchange balance can be achieved by cooperating with the waste heat utilization mechanism, and the utilization rate of heat is improved.

[0023] Optionally, the heated liquid inlet is provided with a first electric valve, and the heating liquid inlet is provided with a second electric valve, and the first electric valve and the second electric valve are electrically connected with the first temperature sensor and the second temperature sensor.

[0024] By adopting the technical scheme, when the lengths of the heating channel and the heated channel are maximum, the first temperature sensor still detects that the temperature of the heated liquid output by the heated liquid outlet does not meet the set requirement, and the second temperature sensor detects that the temperature of the heating liquid output by the heating liquid outlet also does not meet the set requirement, the first temperature sensor will reduce the amount of the heated liquid input by the heated liquid inlet through the first electric valve, and the second temperature sensor will increase the amount of the heating liquid input by the heating liquid inlet through the second electric valve, until the real-time heat exchange balance is achieved by cooperating with the waste heat utilization mechanism, when the lengths of the heating channel and the heated channel are minimum, the first temperature sensor detects that the temperature of the heated liquid output by the heated liquid outlet is higher than the set requirement, and the second temperature sensor detects that the temperature of the heating liquid output by the heating liquid outlet is also higher than the set requirement, the first temperature sensor will increase the amount of the heated liquid input by the heated liquid inlet through the first electric valve, and the second temperature sensor will reduce the amount of the heating liquid input by the heating liquid inlet through the second electric valve, until the real-time heat exchange balance is achieved by cooperating with the waste heat utilization mechanism.

[0025] Optionally, the telescopic end of the first electric telescopic rod is provided with a mounting frame, one side of the mounting frame away from the first electric telescopic rod is provided with a plurality of mounting columns, and the plurality of mounting columns are connected with the plurality of first push plates through the first edge plate.

[0026] By adopting the technical scheme, the plurality of mounting columns mount the plurality of first pushing plates on the mounting frame, so that only one electric telescopic rod is needed to adjust the positions of the plurality of first pushing plates, and the cost required by the device production is reduced.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. 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, the length of the heated channel is extended, and the liquid input speed of the heated liquid inlet is kept unchanged, so as to improve the flow rate of the heated liquid in the heated channel, and the increase of the flow rate can enhance the turbulent degree of the heated liquid, so as to destroy the thermal boundary layer and improve 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, the flow rate of the heated liquid in the heated channel is improved, and the heating effect of the heated liquid is further improved;

[0029] 2. The present application improves the heat exchange effect by changing the shape of the heated channel and the heated channel while keeping the heating efficiency of the heated liquid unchanged, improves 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 in the output box is always greater than or equal to the heated liquid, and the waste heat utilization mechanism in the present application can further utilize the waste heat carried by the heated liquid in the output box to preheat the heated liquid about to be input into the box, thereby further improving the utilization rate of energy;

[0030] 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 waste 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 by electric connection, the length of the heated channel and the heated channel is extended, 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 waste 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 by electric connection, the length of the heated channel and the heated channel is shortened, so that the temperature of the heated liquid meets the demand;

[0031] 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, 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

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. 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 any creative work.

[0033] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0034] Figure 2 yes Figure 1 Schematic diagram of partial structural section;

[0035] Figure 3 yes Figure 2 Schematic diagram of the structure of part A;

[0036] Figure 4 yes Figure 1 Schematic diagram of part of the structure;

[0037] Fig. 1, 11, first fin plate group; 12, first rotating plate; 121, second rotating plate; 122, passive plate; 13, first edge sealing plate; 131, heated channel; 14, second edge sealing plate; 141, heating channel; 15, heating liquid inlet; 16, heating liquid outlet; 17, heated liquid inlet; 18, heated liquid outlet; 19, mounting table; 2, first driving mechanism; 21, first rotating shaft; 22, second rotating shaft; 23, first connecting rod; 24, second connecting rod; 25, driving assembly; 251, first electric telescopic rod; 252, second electric telescopic rod; 253, first push plate; 254, second push plate; 3, waste heat utilization mechanism; 31, liquid outlet pipe; 32, liquid inlet pipe; 4, first temperature sensor; 5, second temperature sensor; 6, first electric valve; 7, second electric valve; 8, mounting frame; 81, mounting column. DETAILED DESCRIPTION

[0038] The following will be described in detail in combination with the accompanying drawings. Figures 1-4 The present application will be further described in detail.

[0039] The embodiment of the present application discloses an energy-saving plate-fin heat exchanger, which refers to Figure 1 , Figure 2 , Figure 3 and Figure 4 An energy-saving plate-fin heat exchanger comprises a box body 1, a plurality of first fin plate groups 11 and a plurality of first fin plate groups 11 are alternately arranged in the box body 1, the first fin plate group 11 and the second fin plate group are arranged perpendicularly to each other, a partition plate is arranged between the first fin plate group 11 and the second fin plate group, a plurality of first edge sealing plates 13 for sealing the edges of the first fin plate group 11 to form heated channels 131 are arranged on the partition plate, and a plurality of second edge sealing plates 14 for sealing the edges of the second fin plate group to form heating channels 141 are arranged on the partition plate, a heating liquid inlet 15 and a heating liquid outlet 16 are arranged on the box body 1, the heating liquid inlet 15 is communicated with the heating liquid outlet 16 through the heating channel 141, and a heated liquid inlet 17 and a heated liquid outlet 18 are further arranged on the box body 1 and communicated through a heated liquid channel.

[0040] The first fin plate group 11 comprises a plurality of first folded plates and a plurality of second folded plates, the first folded plates and the second folded plates are alternately arranged, the first driving mechanism 2 is arranged on the first edge sealing plate 13, the second fin plate group comprises a plurality of third folded plates and a plurality of fourth folded 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, and the mounting table 19 is arranged below the box body 1, and the waste heat utilization mechanism 3 is arranged in the mounting table 19.

[0041] The shape of the heating channel 141 and the heated channel 131 in the prior art is fixed and cannot be adjusted, so the actual working conditions that can be met are limited. The first driving mechanism 2 in the embodiment can adjust the angle between the first folding plate and the second folding plate, change the shape of the heated channel 131, and thus adjust 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, change the shape of the heating liquid channel, and thus adjust the flow path of the heating liquid.

[0042] When it is necessary to improve the heating efficiency of the heated liquid, the first driving mechanism 2 is used to reduce the angle between the first folding plate and the second folding plate, thereby prolonging the length of the heated channel 131 while keeping the liquid input speed of the heated liquid inlet 17 unchanged, so as to increase the flow rate of the heated liquid in the heated channel 131. Increasing the flow rate can enhance the degree of turbulent flow of the heated liquid, thereby destroying the thermal boundary layer and improving the heat transfer coefficient, so as to improve the heating effect of the heated liquid. When it is necessary to further improve the heating efficiency of the heated liquid, the second driving mechanism is used to reduce the angle between the third folding plate and the fourth folding plate, thereby increasing the flow rate of the heating liquid in the heating channel 141, so as to further improve the heating effect of the heated liquid.

[0043] The embodiment can improve the heat exchange effect by changing the shape of the heated channel 131 and the heating channel 141 while keeping the heating efficiency of the heated liquid unchanged, thereby improving the utilization rate of the heat carried by the heating liquid and more accurately controlling the outlet temperature of the heated liquid. The temperature of the heating liquid in the output tank 1 is always greater than or equal to the heated liquid. The waste heat utilization mechanism 3 in the embodiment can further utilize the waste heat carried by the heating liquid in the output tank 1 to preheat the heated liquid about to be input into the tank 1, thereby further improving the utilization rate of energy.

[0044] 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 inserted into the two ends of the passive plate 122. The first rotating plate 12 is rotationally connected to the first rotating shaft 21, and the second rotating plate 121 is rotationally connected to the second rotating shaft 22. The second folding plate is arranged in the same way as the first folding plate. The first connecting rod 23 is used to connect multiple first rotating shafts 21 into one whole, the second connecting rod 24 is used to connect multiple second rotating shafts 22 into one whole, and the driving assembly 25 is used to move the first rotating shaft 21 and the second rotating shaft 22 in opposite directions.

[0045] 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 arranged on the first connecting rod 23 and the second connecting rod 24 respectively, 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 can be extended from or retracted 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. Similarly, the shape of the heated channel 141 can be adjusted.

[0046] 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 slidingly arranged in the first edge 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 penetrates the box body 1 and is connected with the first push plate 253. The second push plate 254 is slidingly arranged in the first edge 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 penetrates the box body 1 and is connected with the second push plate 254.

[0047] Starting the first electric telescopic rod 251 and the second electric telescopic rod 252, shortening the end of the first electric telescopic rod 251 and the second electric telescopic rod 252, can realize the mutual moving away of the first push plate 253 and the second push plate 254, 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 realizing the reduction of the angle between the first folding plate and the second folding plate, extending the length of the heated channel 131. Lengthening the end of the first electric telescopic rod 251 and the second electric telescopic rod 252 can realize the mutual approach of the first push plate 253 and the second push plate 254, 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 close to each other, thereby realizing the increase of the angle between the first folding plate and the second folding plate, shortening the length of the heated channel 131. Similarly, the length of the heated channel 141 can be shortened or lengthened.

[0048] 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 the mounting table 19 in a meandering manner, the liquid inlet pipe 32 is arranged in the mounting table 19 in a spiral manner, the mounting table 19 is filled with a phase change material, the liquid outlet pipe 31 is arranged in two layers in a meandering manner, and the liquid inlet pipe 32 is arranged between the two layers of the liquid outlet pipe 31.

[0049] The heated liquid with residual heat output by the heated liquid outlet 16 enters the liquid outlet pipe 31, and the phase change material in the mounting table 19 is heated, and the heated phase change material preheats the heated liquid in the liquid inlet pipe 32 that is about to be input into the cabinet 1, thereby improving the utilization rate of energy and the heating efficiency of the heated liquid. The liquid outlet pipe 31 is arranged in the mounting table 19 in a meandering manner, and the liquid inlet pipe 32 is arranged in the mounting table 19 in a spiral manner, which can increase the contact area of the liquid outlet pipe 31 and the phase change material and the liquid inlet pipe 32 and the phase change material, and further improve the residual heat utilization rate of the heated liquid. The liquid outlet pipe 31 is arranged in the mounting table 19 in a meandering manner, and the liquid inlet pipe 32 is arranged in the mounting table 19 in a spiral manner, which can facilitate the transfer of residual heat in the liquid outlet pipe 31 to the liquid inlet pipe 32, and improve the effect of utilizing residual heat.

[0050] The first temperature sensor 4 is arranged on the heated liquid outlet 18, and the second temperature sensor 5 is arranged on the heated liquid outlet 16. The first temperature sensor 4 and the second temperature sensor 5 are electrically connected between the first electric telescopic rod 251 and the second temperature sensor 5. The first electric valve 6 is arranged on the heated liquid inlet 17, and the second electric valve 7 is arranged on the heated liquid inlet 15. The first electric valve 6 and the second electric valve 7 are electrically connected between the first temperature sensor 4 and the second temperature sensor 5.

[0051] 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 heated liquid is higher than the set temperature, the telescopic ends of the first telescopic rod and the second telescopic rod are automatically shortened through electrical connection, and the lengths of the heating channel 141 and the heated channel 131 are extended. Therefore, the real-time heat exchange balance can be achieved by cooperating with the residual heat utilization mechanism 3, thereby improving the utilization rate of heat.

[0052] When the lengths of the heating channel 141 and the heated channel 131 are both maximum, the first temperature sensor 4 still detects that the temperature of the heated liquid output by the heated liquid outlet 18 still does not meet the set requirement, and the second temperature sensor 5 detects that the temperature of the heating liquid output by the heating liquid outlet 16 also does not meet the set requirement, 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 heating 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, the first temperature sensor 4 detects that the temperature of the heated liquid output by the heated liquid outlet 18 is higher than the set requirement, and the second temperature sensor 5 detects that the temperature of the heating liquid output by the heating liquid outlet 16 is also higher than the set requirement, 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 heating 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.

[0053] The first electric telescopic rod 251 is provided with a mounting rack 8 on the telescopic end, and a plurality of mounting columns 81 are arranged on the side of the mounting rack 8 away from the first electric telescopic rod 251, and the plurality of mounting columns 81 are connected with the plurality of first push plates 253 through the first edge plate 13. The second electric telescopic rod 252 is arranged in the same way as the first electric telescopic rod 251. The plurality of mounting columns 81 mount the plurality of first push plates 253 on the mounting rack 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 production of the device.

[0054] The implementation principle of the energy-saving plate-fin heat exchanger is as follows:

[0055] When the outflow temperature of the heated liquid needs to be accurately controlled, the first electric telescopic rod 251 and the second electric telescopic rod 252 are started, the ends of the first electric telescopic rod 251 and the second electric telescopic rod 252 are shortened, the first rotating shaft 21 on the first connecting rod 23 and the second rotating shaft 22 on the second connecting rod 24 are driven 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, the ends of the first electric telescopic rod 251 and the second electric telescopic rod 252 are lengthened, 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 are driven to move close to each other, the angle between the first folding plate and the second folding plate increases, and the length of the heated channel 131 shortens. Similarly, the length of the heated channel 141 can be shortened or lengthened. The lengthening of the heated channel 131 and the heated channel 141 can increase the flow rate and enhance the turbulent flow degree of the heated liquid, thereby destroying the thermal boundary layer, improving the heat transfer coefficient, and accurately controlling the outflow temperature of the heated liquid by changing the heat transfer coefficient.

[0056] Unless otherwise defined, technical terms or scientific terms used in the present application shall have their ordinary meanings to those skilled in the art to which the present application pertains. The terms "first", "second", "third" and the like used in the specification and claims of the present application do not denote any order, quantity or importance, but are used to distinguish different components. The terms "one" or "a" and the like do not denote a quantity limitation, but mean that at least one exists. The terms "including", "containing" and the like mean that the elements or objects appearing before "including" or "containing" cover the elements or objects listed after "including" or "containing" and their equivalents, and do not exclude other elements or objects. The terms "up", "down", "left", "right" and the like are used to represent relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships may also change accordingly.

[0057] The above are optional embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An energy-saving plate-fin heat exchanger comprising a box (1), characterized in that: The box (1) is alternately provided with multiple groups of first fin plate groups (11) and multiple groups of second fin plate groups, the first fin plate groups (11) and the second fin plate groups are perpendicularly arranged, a partition plate is arranged between the first fin plate groups (11) and the second fin plate groups, multiple groups of first edge sealing plates (13) for sealing edges of the first fin plate groups (11) to form heated channels (131) are arranged on the partition plate, and multiple groups of second edge sealing plates (14) for sealing edges of the second fin plate groups to form heated channels (141) are arranged on the partition plate, a heating liquid inlet (15) and a heating liquid outlet (16) are arranged on the box (1), the heating liquid inlet (15) is communicated with the heating liquid outlet (16) through the heated channels (141), and a heated liquid inlet (17) and a heated liquid outlet (18) are further arranged on the box (1), the heated liquid inlet (17) and the heated liquid outlet (18) are communicated through a heated liquid channel; The first fin plate groups (11) include multiple groups of first folded plates and multiple groups of second folded plates, the first folded plates and the second folded plates are alternately arranged, the first edge sealing plates (13) are provided with first driving mechanisms (2) for changing angles between the first folded plates and the second folded plates, the second fin plate groups include multiple groups of third folded plates and multiple groups of fourth folded plates, and the second edge sealing plates (14) are provided with second driving mechanisms for changing angles between the third folded plates and the fourth folded plates, the first driving mechanisms (2) are arranged with the second driving mechanisms; A mounting table (19) is arranged below the box (1), a waste heat utilization mechanism (3) for preheating heated liquid about to be input into the box (1) by using waste heat carried by the heating liquid which has been heat-exchanged in the box (1) is arranged in the mounting table (19); 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 folded 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 telescopically arranged at two ends of the passive plate (122), the first rotating plate (12) is rotationally connected with the first rotating shaft (21), the second rotating plate (121) is rotationally connected with the second rotating shaft (22), the second folded plate is arranged with the first folded plate, the first connecting rod (23) is used for connecting multiple groups of the first rotating shafts (21) into a whole, the second connecting rod (24) is used for connecting multiple groups of the second rotating shafts (22) into a whole, and the driving assembly (25) is used for moving the first rotating shaft (21) and the second rotating shaft (22) in opposite directions.

2. The energy-saving plate-fin heat exchanger according to claim 1, 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 slidingly arranged in the first edge 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 penetrates the box body (1) and is connected with the first push plate (253), the second push plate (254) is slidingly arranged in the first edge 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), and the second electric telescopic rod (252) is symmetrically arranged with the first electric telescopic rod (251), and the telescopic end penetrates the box body (1) and is connected with the second push plate (254).

3. 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 heating liquid outlet (16), the liquid outlet pipe (31) is arranged in the mounting table (19) in a meandering manner, the liquid inlet pipe (32) is arranged in the mounting table (19) in a spiral manner, and the mounting table (19) is filled with a phase change material.

4. The energy-saving plate-fin heat exchanger according to claim 3, characterized in that: The liquid outlet pipe (31) is arranged in a meandering manner in two layers, and the liquid inlet pipe (32) is arranged between the two layers of the liquid outlet pipe (31).

5. The energy-saving plate-fin heat exchanger according to claim 2, characterized in that: A first temperature sensor (4) is arranged on the heated liquid outlet (18), a second temperature sensor (5) is arranged on the heating liquid outlet (16), and the first temperature sensor (4) and the second temperature sensor (5) are electrically connected between the first electric telescopic rod (251) and the second temperature sensor (5).

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

7. The energy-saving plate-fin heat exchanger according to claim 2, characterized in that: An installation frame (8) is arranged on the telescopic end of the first electric telescopic rod (251), a plurality of installation columns (81) are arranged on one side of the installation frame (8) away from the first electric telescopic rod (251), the plurality of installation columns (81) penetrate the first edge plate (13) and are connected with the plurality of first push plates (253), and the second electric telescopic rod (252) is arranged in the same way as the first electric telescopic rod (251).

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