Heat exchanger with controllable heat transfer coefficient and use method thereof

Abstract

The present invention discloses a heat exchanger with controllable heat transfer coefficient and a method of use, belonging to the technical field of heat exchangers. The heat exchanger includes a flexible inner core hose, a twisting fixture, an external nozzle, an external hose, and a metal outer shell. The flexible inner core hose can be twisted at different angles by the twisting fixture to change the flow channel spirality, control the strength of liquid collision, change the turbulence of the heat exchange medium, and simultaneously change the flow channel wall thickness to change the wall temperature gradient and thermal resistance, thereby changing the heat transfer coefficient inside and outside the flexible inner core hose, achieving the purpose of controlling the total heat transfer coefficient of the heat exchanger flow channel. During use, the twist angle is increased when a larger heat transfer coefficient is required, and the twist angle is reduced when a smaller heat transfer coefficient is required. The heat transfer coefficient of the heat exchanger flow channel is actively adjusted according to the actual heat exchange rate required by the material in production, thereby meeting the needs of different production conditions in production.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat exchangers, and in particular relates to a heat exchanger with a controllable heat transfer coefficient and a method of using the same. Background Art

[0002] In many fields such as modern agriculture, chemical industry, petroleum, food and drug synthesis, whether the temperature can be accurately controlled often affects the accuracy of production, product quality and energy consumption. Heat exchangers play an important role in achieving accurate temperature control in various fields. Heat exchangers are roughly divided into partition type, hybrid type and heat storage type. Tubular heat exchangers belong to the partition type heat exchanger. The calculation formula for the heat transfer rate of the pipe heat exchanger is:

[0003]

[0004] Among them, Q represents the heat transfer rate, K represents the total heat transfer coefficient of the heat exchanger, and A represents the heat transfer area. Represents the average temperature difference due to heat transfer.

[0005] For heat transfer within the pipe, the overall heat transfer coefficient K can be calculated using the following formula:

[0006]

[0007] Among them, h i and h0 are the convection heat transfer coefficients inside and outside the pipe, is the thickness of the pipe wall, k m is the thermal conductivity of the pipe wall. i and h0 are related to the shape of the flow channel wall and the fluid parameters.

[0008] It is often difficult to precisely control the temperature of existing heat exchangers through adjustments of the heat exchanger itself. It is usually achieved through the flow of external working fluids, auxiliary heating systems, etc. However, these often have inaccurate temperature control or affect the subsequent quality of the process. Based on this, the present invention aims to prepare a heat exchanger with controllable heat transfer coefficient, which can realize the change of the heat transfer coefficient to achieve the effect of precise temperature control. Summary of the Invention

[0009] The present invention provides a heat exchanger with a controllable heat transfer coefficient, and a method for using the controller. The heat controller adjusts and improves the heat conduction of the tube wall and the tube bundle structure to achieve the purpose of precise temperature control. Specifically, the helicity and the thickness of the flow channel wall are changed according to production needs, thereby changing the heat transfer coefficient of the flexible flow channel, solving the technical problem in the prior art that the heat transfer coefficient of the heat exchanger cannot be adjusted at any time without replacing the heat exchanger flow channel and changing the flow medium parameters.

[0010] Another concept of the present invention is to provide a heat exchanger with a controllable heat transfer coefficient. The heat exchanger includes a flexible flow channel and a heating system. On the one hand, the heat exchanger can regulate the helicity and wall thickness of the flexible flow channel, thereby controlling the strength of the collision between the liquids in the flow channel, changing the turbulence of the heat exchange medium, and changing the wall thickness of the flow channel to change the wall temperature gradient and thermal resistance, thereby changing the heat transfer coefficient inside and outside the flexible flow channel; on the other hand, the heat exchanger provided by the present invention can also include a heating system, which controls the temperature of the working fluid outside the flow channel through the heating system to further control the heat exchange effect. The two together achieve precise control of temperature.

[0011] Specifically, the present invention provides a heat exchanger with a controllable heat transfer coefficient, which includes a tubular shell, a flexible inner core hose, and a torsion fixing device. The flexible inner core hose is arranged in the tubular shell, and the torsion fixing device fixes the flexible inner core hose to the tubular shell.

[0012] It should be noted that the size specifications of the tubular shell can be customized according to production requirements. Generally speaking, the larger the size of the tubular shell, the more working fluid can be accommodated in the shell, the smaller the temperature fluctuation range of the working fluid is, and the temperature control is more precise. In addition, the length of the tubular shell generally corresponds to the length of the flexible inner core hose. The longer the length, the longer the distance the medium (generally reaction raw materials) in the flexible inner core hose flows in the heat exchanger, and the more precise the heat exchange effect will be.

[0013] Furthermore, the medium filled in the tubular shell is a heat exchange medium;

[0014] The heat exchange medium filled in the tubular shell mainly plays the role of ensuring that the heat exchanger is at the required operating temperature. The heat exchange medium in the tubular shell can be circulated internally and externally, or the temperature of the heat exchange medium in the tubular shell can be controlled by auxiliary heat through a temperature control system.

[0015] Furthermore, the flexible inner core hose contains the working medium to be heat exchanged, which is generally a reaction raw material, or an intermediate material, or a finished material.

[0016] Furthermore, the flexible inner core hose is made of a flexible material with elasticity, and the flexible material includes one or more of PVC, PE-XA, and polyurethane.

[0017] The flexible inner core hose is made of an elastic flexible material. When an external force is applied, the flexible material can change its shape inside the flexible hose, thereby controlling the strength of the collision between the liquids in the flow channel, changing the turbulence of the heat exchange medium, and achieving the effect of regulating the heat transfer coefficient.

[0018] In addition, theoretically, any material that meets the requirements of flexibility and changeability can be used as a flexible inner core hose, but it needs to meet other requirements required by various industries, such as food safety, acid and alkali resistance, lifespan, high temperature resistance, etc. These technical problems can be solved in the field of materials.

[0019] Furthermore, the cross-sectional shape of the flexible inner core hose is a rosette, which is composed of a plurality of inferior arcs;

[0020] Furthermore, the arc of the inferior arc is less than 120°, preferably less than 110°, and more preferably less than 100°;

[0021] Further, the thickness of the flexible inner core hose is less than 0.3cm, more preferably less than 0.2cm;

[0022] Further, the flexible inner core hose tube radius is less than 5cm, preferably less than 4cm;

[0023] The flexible inner core hose transverse section of the rosette circumscribed diameter is less than 8cm, preferably less than 7cm;

[0024] The flexible inner core hose of the present invention uses a special-shaped structure, and the cross-section of the flexible inner core hose is in the shape of a rosette. The cross-sectional area of ​​the flexible inner core hose is the largest when it is not twisted, the liquid flows at the fastest speed therein, and the heat exchange rate is low. When twisting occurs, the rosettes at both ends of the flexible inner core hose are staggered, and the flow channel changes. The flow state of the liquid in the twisted flexible inner core hose changes, and the collision intensity of the liquid changes, causing the turbulence degree of the heat exchange medium to change. In addition, after the flexible inner core material is twisted, the thickness of the flow channel wall changes, causing the wall temperature gradient and thermal resistance to change, thereby changing the heat transfer coefficient inside and outside the flexible flow channel.

[0025] In some embodiments, the twisting and fixing device uses a turntable wheel to achieve the twisting function;

[0026] The torsion fixing device includes a torsion turntable wheel, a waterproof sealing gasket, a torsion turntable wheel, and a fixing pin;

[0027] The torsion turntable wheel is connected to the material inlet end, or the torsion turntable wheel is connected to the material outlet end;

[0028] A material inlet end or a material outlet end is provided inside the twisting and fixing device.

[0029] The waterproof sealing gasket is arranged in the torsion fixing device, and the material inlet end or the material outlet end is connected to the shell through the waterproof sealing gasket to prevent leakage of the heat exchange medium;

[0030] The torsion turntable is connected to the material inlet end or the material outlet end, and the adjustment of the torsion turntable drives the material inlet end or the material outlet end to rotate.

[0031] In some embodiments, the flexible inner core hose is connected to the material inlet end and the material outlet end, specifically using a hose clamp to achieve the connection. The hose clamp can be a screw-driven hose clamp, which is used to enable the material to enter the flexible inner core hose through the material inlet end and be output from the material outlet end.

[0032] The material inlet end or the material outlet end is connected to another hose, specifically using a screw-driven hose to achieve the connection, so as to realize continuous transmission of the material.

[0033] The twist fixing device is connected to the flexible inner core hose and the material outlet end or the material inlet end through a hose clamp;

[0034] Specifically, by twisting the turntable wheel, the material inlet end and / or the material inlet end drive the flexible inner core hose to achieve a twist angle and channel helicity corresponding to the required heat transfer coefficient range. When a higher heat transfer coefficient is required, the twist angle is increased, and the flexible wall surface is pulled thinner by the greater torque, and the flow channel helicity is also higher. At this time, the shape of the heat exchanger flow channel tends to be more spiral, causing the direction of liquid flow in the middle to be slightly tilted, but the overall direction remains unchanged. The collision between the two increases the turbulence of the heat exchange medium. The thinning of the flexible wall surface reduces the temperature gradient, greatly reducing the thermal resistance of the tube wall and improving the heat transfer coefficient inside and outside the tube. According to the calculation formula of the total heat transfer coefficient:

[0035]

[0036] It can be seen that the heat transfer coefficient inside and outside the tube is and As the pressure increases, the thickness of the pipe wall decreases, thereby increasing the overall heat transfer coefficient of the heat exchanger flow channel.

[0037] Furthermore, when a lower heat transfer coefficient is required, the torsion angle is reduced. This weakens the torsional pull on the flexible wall, reducing the flow channel's helicity. This results in a smoother flow channel, less collisions between liquids, and less turbulence. Simultaneously, the thickening of the wall increases the temperature gradient, increasing the thermal resistance of the tube wall and reducing the heat transfer coefficient inside and outside the tube, thereby reducing the overall heat transfer coefficient of the heat exchanger's flow channel. After the torsion is completed, the torsion turntable of the torsion fixing device is secured with a fixing pin.

[0038] In some embodiments, the present invention provides a heat exchanger with a controllable heat transfer coefficient, wherein the tubular shell of the heat exchanger includes a heat exchange medium outlet end and a heat exchange medium inlet end.

[0039] In this embodiment, the heat exchange medium outlet and inlet are arranged to achieve circulation of the external heat exchange medium and the heat exchange medium inside the tubular shell, thereby achieving control of the temperature inside the tubular shell of the heat exchanger.

[0040] In other embodiments, the present invention provides a heat exchanger with a controllable heat transfer coefficient, wherein a heating system is provided on the tubular shell of the heat exchanger. The heating system is an electric heating element provided on the tubular shell, and the heating element can be a resistance wire. The electric heating element controls the temperature of the heat exchange medium in the tubular shell by controlling the start and stop of the electric heating element.

[0041] In some embodiments, the present invention provides a heat exchanger with a controllable heat transfer coefficient, wherein the heat exchanger further comprises a material inlet and a material outlet, wherein the material inlet and the material outlet are connected to a flexible inner core hose to realize the transfer of the material.

[0042] The heat exchanger with controllable heat transfer coefficient provided by the present invention has the following beneficial effects:

[0043] (1) The present invention provides a heat exchanger with controllable heat transfer coefficient. The heat exchanger can adjust the heat transfer coefficient at any time according to the temperature requirement of the reactor, change the actual heat transfer rate of the heat exchanger, and thus better control the temperature of the reaction process.

[0044] (2) The heat exchanger with controllable heat transfer coefficient provided by the present invention can adjust the heat exchange rate according to actual production conditions, thereby avoiding low production efficiency due to insufficient heat exchange or energy waste due to excessive heat exchange.

[0045] (3) The heat exchanger with controllable heat transfer coefficient provided by the present invention may include a plurality of flexible inner core hoses, each of which can independently adjust the torsion angle, so that each flexible inner core hose has a different heat transfer coefficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 : A schematic structural diagram of a heat exchanger of the present invention;

[0047] Figure 2 : Left side view of the heat exchanger of the present invention;

[0048] Figure 3 : A schematic diagram of a partially enlarged structure of the torsion fixing device at the material inlet end of the heat exchanger of the present invention;

[0049] Figure 4 : Schematic diagram of another heat exchanger of the present invention

[0050] Figure 5 : A three-dimensional diagram of the flexible inner core hose of the heat exchanger of the present invention;

[0051] Figure 6 : Cross-sectional view of the flexible inner core hose of the heat exchanger of the present invention;

[0052] Figure 7 : Temperature distribution cloud diagram of the flexible inner core hose and the control round tube under different torsion angles of the heat exchanger of the present invention;

[0053] Wherein: 1. Flexible inner core hose; 2. Outer shell; 3. Heat exchange medium outlet; 4. Heat exchange medium inlet; 5. Material inlet; 6. Material outlet; 7. External nozzle; 8. Hose; 9. Screw-driven hose clamp; 10. Waterproof sealing gasket; 11. Fixing pin; 12. Twist-turn wheel; 13. Scale; 14. Resistance wire DETAILED DESCRIPTION

[0054] In order to better understand the present invention, the content of the present invention will be further illustrated below in conjunction with the embodiments so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted that the following are only preferred embodiments of the present invention, but the content of the present invention is not limited to the following embodiments. In fact, various modifications and variations can be made in the present invention without departing from the scope or spirit of the present invention, which will be apparent to those skilled in the art. For example, the features shown or described as part of one embodiment can be used together with another embodiment to produce another embodiment. Therefore, it is intended that the present invention include such modifications and variations within the scope of the appended claims and their equivalents.

[0055] See attached Figure 1 The present invention provides a heat exchanger with controllable heat transfer coefficient, which includes an outer shell 2, a flexible inner core hose 1, a torsion fixing device, an external nozzle 7, and an external pipe 8;

[0056] The flexible inner core hose is arranged in the metal outer shell, and the twisting and fixing device fixes the flexible inner core hose on the tubular shell.

[0057] The outer shell can be a plastic part or a metal part. The setting of the outer shell can be adjusted according to the working conditions, such as the type of heat exchange medium, heat exchange conditions, working external pipe diameter and other factors. This selection and adjustment can be achieved by those skilled in the art, and the effect achieved by selecting different materials for the shell can be expected.

[0058] The shape of the outer shell is mainly a columnar structure, which is used to store heat exchange medium and can be installed with a flexible inner core hose;

[0059] Specifically, this embodiment uses a tubular shell and is made of metal material.

[0060] Furthermore, the outer shell 2 is also provided with a heat exchange medium inlet port 4 and a heat exchange medium outlet port 3.

[0061] Among them, the heat exchange medium inlet port 4 and the heat exchange medium outlet port 3 are used to realize the circulation of the heat exchange medium in the outer shell 2, so that the temperature of the heat exchange medium in the heat exchanger is accurately controlled to meet production requirements.

[0062] Furthermore, according to the needs, the heat exchange medium inlet end 4 is generally set below the heat exchange medium outlet end 3. Through a certain staggered position setting, a better temperature control effect of the heat exchange medium and a more sufficient heat exchange with the flexible inner core hose 1 can be achieved.

[0063] Furthermore, the heat exchange medium inlet end is composed of an external nozzle 7 and an external hose to realize the transportation of the medium.

[0064] The torsion fixing device is fixed to the outer shell 2 , and at the same time, the torsion fixing device is connected to the flexible inner core hose 1 to achieve spiral adjustment of the flexible inner core hose 1 .

[0065] The flexible inner core hose 1 is connected to the material inlet end 5 and the material outlet end 6 respectively. The material inlet end 5 and the material outlet end 6 can enable the material to pass through the flexible inner core hose 1 smoothly, realize heat exchange of the material, and accurately adjust the temperature of the material.

[0066] See also Figure 2 , which is a side view of the heat exchanger of the present invention. The heat exchanger disclosed in this embodiment has seven groups of flexible inner core hoses 1. The torsion fixing device includes a screw-driven hose clamp 9. The screw-driven hose clamp 9 on the torsion fixing device is used to adjust the helicity of the hose inner core hose to achieve the purpose of adjusting the heat transfer coefficient.

[0067] Further, the structure of the torsion fixing device of the present invention is shown in Figure 3 The torsion fixing device includes a dial 13, a waterproof sealing gasket 10, and a torsion turntable wheel 12; wherein the torsion turntable wheel 12 is connected to the material inlet end 5, and the material inlet end 5 is fixed to the outer shell 2, and a waterproof sealing gasket 10 is provided between the material inlet end 5 and the outer shell 2 to prevent the heat exchange medium from overflowing from the shell; furthermore, the flexible inner core hose 1 is connected to the material inlet end 5, specifically using a hose clamp, which can be a screw-driven hose clamp 9. The material inlet end 5 is connected to another hose 8, specifically using a screw-driven hose clamp 9.

[0068] Furthermore, the twisting turntable wheel 12 can drive the rotation of the material inlet end 5, and the flexible inner core hose 1 is relatively fixedly connected to the material inlet end 5, and then the flexible inner core hose 1 is twisted by the twisting turntable wheel 12 to achieve the function of regulating the heat transfer coefficient.

[0069] See also Figure 3 A fixing pin 11 may also be provided on the torsion fixing device to fix the torsion turntable wheel 12 of the torsion fixing device.

[0070] It should be noted that Figure 3 Only the 5 torsion fixing devices at the material inlet are shown. Figure 1 The same result can also be achieved at the middle material inlet 6, or a single fixed structure can be directly adopted. The torsion fixing device is arranged at one end or both ends of the flexible inner core hose 1 in the heat exchanger, which can be set according to actual needs.

[0071] Furthermore, in this embodiment, the torsion fixing device can also limit the degree of rotation to specific rotation angles. For example, the torsion fixing device can have multiple fixed torsion gears to achieve fast and fixed adjustment. Specifically, there are twelve torsion gears, namely 0°, 30°, 60°, 90°, 120°, 150°, 180°, 210°, 240°, 270°, 300°, and 330°. Each torsion gear has a corresponding scale mark and fixed bracket on the metal outer shell dial 13.

[0072] See attached Figure 4 In another embodiment, in order to achieve more precise control of the temperature of the heat exchange medium inside the shell, the present invention provides a resistance wire 14 inside the shell 2. The resistance wire can heat the heat exchange medium according to the detected temperature change of the heat exchange medium in the shell 2, accurately control the temperature inside the shell, and achieve precise temperature control of the entire heat exchanger.

[0073] Further, for the structure of the flexible inner core hose, see Figure 5-6 The flexible inner core hose of this embodiment is made of PVC material; the cross-sectional shape of the flexible inner core hose is a rosette, which is composed of multiple inferior arcs, and the thickness of the flexible inner core hose is 0.1 cm.

[0074] In this embodiment, the inferior arc of the flexible inner core hose is 90°, the inferior arc radius is 1.5 cm, the number of inferior arcs is 8, and the hose length is 50 cm; the circumscribed diameter of the rosette is 6 cm;

[0075] It should be noted that the specific parameters of the flexible inner core hose 1 of this embodiment are only one embodiment of the present invention and do not represent the entire content of the present invention. The number of inferior arcs, inferior arc angle, inferior arc radius, etc. can be adjusted. Similarly, the length, diameter and thickness of the flexible inner core hose can also be adjusted according to the specifications of the heat exchanger.

[0076] Generally speaking, the curvature of the inferior arc is less than 120°, preferably less than 110°, and more preferably less than 100°; the thickness of the flexible inner core hose is less than 0.3 cm, and more preferably less than 0.2 cm; the inner radius of the flexible inner core hose is less than 5 cm, and preferably less than 4 cm; the circumscribed diameter of the rosette of the transverse section of the flexible inner core hose is less than 8 cm, and preferably less than 7 cm.

[0077] In other embodiments, the working principle of the heat exchanger is disclosed, that is, by twisting the twisting turntable wheels 12 at both ends, the flexible inner core hose 1 reaches a twisting angle and channel helicity corresponding to the required heat transfer coefficient range, and after the twisting is completed, the twisting turntable wheels 12 of the twisting fixing device are fixed with a fixing pin 11.

[0078] When a higher heat transfer coefficient is required, the twist angle is increased. The flexible wall is pulled thinner by the greater torsional force, and the flow channel helicity increases. At this time, the heat exchanger flow channel shape tends to be more spiral, causing the direction of liquid flow in the middle to be slightly tilted, but the overall direction remains unchanged. The collision between the liquids increases the turbulence of the heat transfer medium. The thinning of the flexible wall reduces the temperature gradient, greatly reducing the thermal resistance of the tube wall and improving the heat transfer coefficient inside and outside the tube, thereby increasing the overall heat transfer coefficient of the heat exchanger flow channel.

[0079] When a smaller heat transfer coefficient is required, the torsion angle is reduced, the torsional pulling effect on the flexible wall is weakened, and the flow channel helicity is reduced. At this time, the flow channel is smoother, the liquid flow collision is reduced, and the turbulence is reduced. At the same time, the wall becomes thicker, which increases the temperature gradient, increases the thermal resistance of the tube wall, and reduces the heat transfer coefficient inside and outside the tube, thereby reducing the overall heat transfer coefficient of the heat exchanger flow channel.

[0080] In order to further illustrate the heat exchange effect of the heat exchanger provided in this embodiment, a simulation experiment was conducted on the heat exchanger of the present invention. For specific results, see Figure 7; Take a single flexible inner core hose 1 as the simulation object. The flexible inner core hose 1 is 50 cm long and 0.1 cm thick. The cross-sectional shape of the tube is a wreath. The outer ring of the wreath is composed of 8 inferior arcs with an arc angle of 90°. The arc radius is 0.75 cm and the circumscribed diameter of the wreath is 6 cm. The flexible inner core hose 1 is made of a flexible material with high thermal conductivity. The three different groups of the flexible inner core hose 1 without twisting, that is, the twisting angle is 0°, twisting 120°, and twisting 210° are simulated as experimental groups; as a control, a circular pipe with a length of 50 cm, an circumscribed diameter of 6 cm, and a thickness of 0.1 cm is added, and the three groups with twisting angles of 0°, 120°, and 210° are set as the control group. The temperature distribution cloud map results of the experimental group and the comparison group can be found in . Figure 7 When the fluid inlet parameters are the same, the changes in the outlet parameters of different groups and the differences in the overall heat transfer coefficient are compared.

[0081] The temperature distribution cloud map can indirectly determine the total heat transfer coefficient of the heat exchanger flow channel. The heat transfer coefficient in the heat exchanger flow channel determines the heat transfer speed and efficiency. When the heat transfer coefficient is high, the temperature change in the flow channel will be more obvious, and a clear temperature gradient will appear on the temperature distribution cloud map. Figure 7 It can be seen that the temperature changes of the wreath-shaped flexible inner core hose 1 at each torsion angle are more obvious than those of the ordinary round tube at the same angle, and the total heat transfer coefficient of the flow channel is greater. At the same time, the total heat transfer coefficient of the wreath-shaped flexible inner core hose 1 changes faster than that of the ordinary round tube at different torsion angles, indicating that the wreath-shaped flexible inner core hose 1 has better performance than the ordinary round tube. As the torsion angle of the wreath-shaped flexible inner core hose 1 increases, the temperature gradient on the temperature distribution cloud map changes more significantly. Therefore, as the torsion angle of the wreath-shaped flexible inner core hose 1 increases, the total heat transfer coefficient of the flow channel increases.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A heat exchanger with controllable heat transfer coefficient, comprising a shell, a material inlet end, and a material outlet end, characterized in that: The heat exchanger also includes a flexible inner core hose and a torsion fixing device; The flexible inner core hose is arranged in the shell; The torsion fixing device is connected to the flexible inner core hose; The twisting and fixing device can realize the twisting of the flexible inner core hose to adjust the heat transfer coefficient; The shell is provided with a heat tracing system, wherein the heat tracing system is provided with an electric heating element on the shell, and the electric heating element controls the temperature of the heat exchange medium in the tubular shell by controlling the on and off of the electric heating element; The flexible inner core hose is made of elastic material; The cross-sectional shape of the flexible inner core hose is a rosette, which is composed of a plurality of inferior arcs; the curvature of the inferior arc is less than 120°; The thickness of the flexible inner core hose is less than 0.3cm; The outer diameter of the rosette of the transverse section of the flexible inner core hose is less than 8 cm; The torsion fixing device includes a torsion turntable wheel and a waterproof sealing gasket; The torsion turntable wheel is connected to the material inlet end, or the torsion turntable wheel is connected to the material outlet end; The twisting and fixing device is provided with a material inlet end or a material outlet end inside; The waterproof sealing gasket is arranged in the torsion fixing device, and the material inlet end or the material outlet end is connected to the shell through the waterproof sealing gasket to prevent leakage of the heat exchange medium; The torsion turntable is connected to the material inlet end or the material outlet end, and the adjustment of the torsion turntable drives the material inlet end or the material outlet end to rotate; The flexible inner core hose is connected to the material inlet and the material outlet, and the connection is achieved by using a hose clamp; The torsion fixing device further comprises a dial, and the dial is fixedly arranged on the outer shell; The torsion fixing device is provided with a fixing pin, which fixes the torsion turntable wheel of the torsion fixing device after the fixing pin rotates; A heat exchange medium outlet and a heat exchange medium inlet are provided on the shell of the heat exchanger, and the heat exchange medium outlet and the heat exchange medium inlet are staggered.

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