A tubular heat exchanger for a heater

Abstract

The application discloses a tubular heat exchange device for a heater and relates to the technical field of the heater. The tubular heat exchange device comprises a cylinder body, a heat exchange part is arranged in the cylinder body, a movable part and an electromagnet are arranged outside the cylinder body, the electromagnet is driven by a driver outside the cylinder body and slides along the cylinder body, the heat exchange part comprises a first pipe plate and a second pipe plate which are opposite to each other, a plurality of heat exchange pipes are inserted between the first pipe plate and the second pipe plate, the outer wall of the heat exchange pipe is sleeved with a temperature insulation sleeve, and the movable part comprises a movable plate. The tubular heat exchange device for the heater adjusts the distance of the cold fluid in the heat exchange of the heating pipe by covering the heating pipe, the temperature between two adjacent heat conducting rings does not interfere with each other, the technical problem that the temperature after the heat exchange cannot be controlled when the existing tubular heat exchange device is used is effectively solved, and the purpose that the heat exchange temperature is controllable is achieved.

Description

Technical Field

[0001] This invention relates to the field of heater technology, and in particular to a tubular heat exchange device for a heater. Background Technology

[0002] Tubular heat exchangers are the most typical type of indirect heat exchanger. They have a long history of industrial application and still dominate the category of all heat exchangers. Tubular heat exchangers mainly consist of a shell, tube bundle, tube sheet, and end caps. The shell is mostly circular and contains parallel tube bundles, with both ends of the tube bundles fixed to the tube sheet.

[0003] Currently, existing tubular heat exchangers mainly consist of plate bundles and end caps. The plate bundle contains several channels. Fins are placed between two flat plates in each channel layer, and the sides are sealed with seals. Depending on the fluid flow pattern, the cold and hot fluid channels are stacked, arranged, and brazed together to form the plate bundle. The two fluid flow patterns include counter-current, cross-current, and cross-counter-current. The two fluids are respectively introduced into their respective plate bundle channels through guide vanes in a distribution section from the inlet end cap, and then guided to the outlet end cap by guide vanes in another distribution section, resulting in counter-current heat exchange between the two fluids. Commonly used fins include straight, porous, serrated, and corrugated types.

[0004] However, during the implementation of the above technical solution, at least the following technical problems were discovered:

[0005] Unable to control the temperature after heat exchange: In existing tubular heat exchangers, the cold fluid flows from one end of the heat exchange tube to the other, absorbing heat from the surface of the tube during its movement until it reaches the other end (the outlet end). During this process, the cold fluid must completely pass through the heat exchange tube. This means that under the same conditions (flow rate, heat pipe temperature, cold fluid temperature, etc. remain constant), the amount of heat exchange cannot be changed. However, heat exchangers often require a specific temperature during operation, which cannot be too high or too low. This is something existing tubular heat exchangers cannot meet. For example, if the temperature of the cold fluid after absorbing heat is 100℃, but the required temperature is 80℃, the temperature of the cold fluid after heat absorption remains at 100℃, failing to reach the required 80℃. Therefore, we propose a tubular heat exchanger for heaters. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this invention provides a tubular heat exchanger for heaters, solving the technical problem that existing tubular heat exchangers cannot control the temperature after heat exchange and can only be adjusted through subsequent cooling.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A tubular heat exchanger for a heater includes a cylinder for storing heat exchange elements. The heat exchange elements inside the cylinder are used to transfer heat absorbed from a hot fluid to a cold fluid. An insulating sleeve is fitted around the heat exchange elements and is connected to a movable element, which is driven to move by a driver via magnetic attraction. Figure 3 and Figure 4 As shown:

[0011] The cylinder is cylindrical in shape and contains heat exchange components (used to transfer the heat absorbed from the hot fluid to the cold fluid). The hot and cold fluids move inside the cylinder and exchange heat.

[0012] The moving parts are installed inside the cylinder, and the heat exchange components are inserted into the moving parts, such as... Figure 5 As shown; and

[0013] An electromagnet generates magnetism when energized and loses its magnetism when de-energized. It is mounted on the outside of a cylinder and driven by an external actuator, sliding back and forth along the cylinder. Figure 5 As shown;

[0014] The heat exchanger includes a first tube sheet and a second tube sheet that are opposite to each other (i.e., located at both ends of the heat exchange tubes and used to fix the ends of the heat exchange tubes), and several heat exchange tubes are inserted between the first tube sheet and the second tube sheet. Each heat exchange tube includes several heat-conducting rings (made of heat-conducting material, which is a non-ferromagnetic material, such as copper tubes) and heat-insulating rings (made of heat-insulating material, which is a non-ferromagnetic material, such as polyurethane foam board) connected between the heat-conducting rings. When the heat-conducting rings come into contact with the hot fluid, they absorb the heat of the hot fluid and release the heat into the cold fluid when the cold fluid flows through them. The heat-insulating rings can isolate two adjacent heat-conducting rings to prevent the temperature from being conducted to other heat-conducting rings along the heat-conducting rings.

[0015] The outer wall of the heat exchange tube is fitted with an insulating sleeve (made of insulating material in the shape of a corrugated pipe, such as...). Figure 7 As shown, secondly, the gap between the heat exchange tube and the insulation sleeve is small, and the insulation sleeve is used to insulate the heat exchange tube, thereby separating the hot fluid from the heat exchange tube. A small amount of hot fluid will enter the gap between the insulation ring and the insulation sleeve. The temperature and volume of these hot fluids are limited, and their impact on the heat exchange results is negligible.

[0016] The movable component includes a movable plate, which is installed outside the heat exchange tubes (the heat exchange tubes pass through the movable plate). The movable plate is connected to one end of the insulation sleeve, and the other end of the insulation sleeve is connected to the second tube sheet. Figure 3 and Figure 4 As shown, when the movable plate moves towards the first tube sheet, the insulation sleeve located between the second tube sheet and the movable plate elongates, thereby reducing the "length" of the heat exchange tubes, such as... Figures 4 to 3 As shown;

[0017] When energized, the electromagnet attracts the magnetic block outside the movable plate. Therefore, as the electromagnet moves, it can drive the movable plate to move as well. The two move together through magnetic attraction without affecting the internal components of the cylinder. Furthermore, apart from the magnetic block and the electromagnet, all other materials are made of non-magnetic materials.

[0018] In some examples, the actuator includes a lead screw mounted on the outer wall of the cylinder, and the lead screw is driven to rotate by a motor outside the cylinder, causing the electromagnet to move back and forth along the outer wall of the lifting cylinder, such as... Figure 3 and Figure 4 As shown;

[0019] The electromagnet is connected to the lead screw by a thread, so the electromagnet can move back and forth along the lead screw during the rotation of the lead screw. The electromagnet is arc-shaped and fits against the outer wall of the cylinder to prevent the electromagnet and the lead screw from rotating synchronously.

[0020] In some examples, the outer wall of the cylinder is equipped with a hot fluid inlet and a hot fluid outlet, so that the hot fluid enters the cylinder along the hot fluid inlet, circulates in the cylinder, and is absorbed by the heat exchange tube. The two ends of the cylinder are respectively equipped with a first end cap and a second end cap, which correspond to the two ends of the heat exchange tube to facilitate the flow of cold fluid in the heat exchange tube.

[0021] The first end cap has a cold fluid inlet installed below it, and the second end cap has a cold fluid outlet installed above it. The cold fluid that needs to be heated enters through the cold fluid inlet, is heated by the heat exchange tube, and is then discharged through the cold fluid outlet.

[0022] Preferably, a temperature control component is connected between the first end cap and the cold fluid outlet;

[0023] The temperature control component includes an auxiliary flow pipe, and flow controllers are installed on the outside of the auxiliary flow pipe and inside the cold fluid outlet. By mixing the cold fluid before and after heat exchange, the cold fluid discharged from the cold fluid outlet reaches the required temperature. For example, if the temperature of the cold fluid before heat exchange is 0℃ and the temperature of the cold fluid after heat exchange is 30℃, when the required temperature is between the two temperatures, such as the required temperature of 20℃, the cold fluid at 0℃ and the cold fluid at 30℃ are mixed to neutralize the heat and obtain the required 20℃ cold fluid.

[0024] In some examples, temperature sensors are installed inside both the first and second end caps to detect the temperature of the cold fluid before and after heat exchange, facilitating the control box to adjust the temperature of the cold fluid.

[0025] In some examples, an impeller and a motor that drives the impeller to rotate are installed on the inner wall of the cold fluid outlet. When the cold fluid flows through, it impacts the impeller, causing the impeller to rotate, thereby accelerating the mixing of the cold fluid before and after heat exchange.

[0026] The impeller is located above the connection between the auxiliary flow pipe and the cold fluid outlet, which facilitates the mixing of the cold fluid before and after heat exchange.

[0027] Preferably, a method of using a tubular heat exchanger for a heater includes the following steps:

[0028] Initial temperature: The temperature at which the cold fluid is discharged;

[0029] Temperature regulation: The heat exchange tube is wrapped with insulating material, and the temperature of the cold fluid is observed when it is discharged. The process is stopped when the temperature reaches the specified temperature.

[0030] Preferably, during the temperature regulation process, the insulation material is wrapped from the end of the heat exchange tube to the other end.

[0031] Preferably, the method further includes:

[0032] Temperature control: Detects the initial and discharge temperatures of the cold fluid, and mixes the cold fluid before heat exchange with the cold fluid after heat exchange to obtain a cold fluid at a specified temperature.

[0033] Preferably, in the temperature control step, after measuring the initial and discharge temperatures of the cold fluid, the volume ratio of the cold fluid before and after heat exchange is controlled according to the required temperature of the cold fluid.

[0034] The formula for the volume ratio of the cold fluid before and after heat exchange when they are mixed is shown below:

[0035] V1:V2 = (t2-T): (T-t1)

[0036] Where V1 represents the volume before heat exchange, t1 represents the temperature before heat exchange, V2 represents the volume after heat exchange, t2 represents the temperature after heat exchange, and T represents the specified temperature.

[0037] (III) Beneficial Effects

[0038] 1. By using a covered heating tube to adjust the distance of the cold fluid for heat exchange in the heating tube, and because the heat exchange tube is composed of a heat-conducting ring and a heat-insulating ring, the temperature between two adjacent heat-conducting rings does not interfere with each other. Therefore, it effectively solves the technical problem that existing tubular heat exchange devices cannot control the temperature after heat exchange during use, thereby achieving the goal of controllable heat exchange temperature. This allows for the direct acquisition of the cold fluid at the required temperature, improves the applicability of the device, avoids the need for subsequent adjustments, and saves process steps.

[0039] 2. Because the moving parts are driven by magnetic attraction, the sealing requirements of the driver can be effectively reduced.

[0040] 3. By using the mixing of cold fluids before and after heat exchange to achieve the required temperature, the technical problem of existing tubular heat exchangers being unable to control the temperature after heat exchange is effectively solved, thereby achieving the goal of controllable heat exchange temperature, facilitating the acquisition of cold fluids at the required temperature, and improving the applicability of the device. Attached Figure Description

[0041] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0042] Figure 1 This is an overall structural diagram of an embodiment of the present invention;

[0043] Figure 2 This is an exploded view of the overall structure in an embodiment of the present invention;

[0044] Figure 3 This is one of the structural diagrams of the heat exchanger in an embodiment of the present invention;

[0045] Figure 4 This is the second structural diagram of the heat exchanger in an embodiment of the present invention;

[0046] Figure 5 This is a structural diagram of the driver and moving parts in an embodiment of the present invention;

[0047] Figure 6 This is a structural diagram of the movable component in an embodiment of the present invention;

[0048] Figure 7 This is a partial cross-sectional view of the moving parts and heat exchanger in an embodiment of the present invention.

[0049] Legend: 11. Shell; 12. First end cap; 13. Second end cap; 14. Cold fluid inlet; 15. Cold fluid outlet; 16. Hot fluid inlet; 17. Hot fluid outlet; 2. Electromagnet; 3. Actuator; 31. Lead screw; 32. Motor; 4. Temperature control assembly; 41. Auxiliary flow pipe; 42. Flow controller; 5. Heat exchanger; 51. First tube sheet; 52. Second tube sheet; 53. Heat exchanger tube; 531. Heat conducting ring; 532. Heat insulation ring; 54. Heat insulation sleeve; 6. Moving parts; 61. Moving plate; 62. Magnet block. Detailed Implementation

[0050] This application provides a tubular heat exchanger for a heater, effectively solving the technical problem that existing tubular heat exchangers cannot control the temperature after heat exchange and can only be adjusted by subsequent cooling. By using a covered heating tube to adjust the distance of the cold fluid during heat exchange, and by ensuring that the temperature between adjacent heat-conducting rings does not interfere with each other, the heat exchange temperature can be controlled. This allows for direct access to the desired cold fluid temperature, improving the applicability of the device and avoiding subsequent adjustments, thus saving steps. Furthermore, the use of magnetic attraction to move the moving parts effectively reduces the sealing requirements of the actuator. Finally, the mixing of the cold fluid before and after heat exchange to achieve the desired temperature further enhances the controllability of the heat exchange temperature, facilitating the acquisition of the required cold fluid temperature and improving the applicability of the device.

[0051] Example 1

[0052] The technical solution in this application embodiment effectively solves the problem that existing tubular heat exchangers cannot control the temperature after heat exchange and can only be adjusted by subsequent cooling. The overall idea is as follows:

[0053] To address the problems existing in the prior art, the present invention provides a tubular heat exchanger for a heater. This tubular heat exchanger includes a cylindrical body 11 for storing heat exchange elements 5. The heat exchange elements 5 inside the cylindrical body 11 are used to conduct heat absorbed from a hot fluid to a cold fluid. An insulating sleeve 54 is fitted around the heat exchange elements 5, and the insulating sleeve 54 is connected to a movable element 6. The movable element 6 is driven to move by a driver 3 via magnetic attraction. Figure 3 and Figure 4 As shown:

[0054] The cylinder 11 is cylindrical and has a heat exchanger 5 installed inside (for transferring the heat absorbed from the hot fluid to the cold fluid). The hot and cold fluids move inside the cylinder 11 and exchange heat.

[0055] The movable part 6 is installed inside the cylinder 11, and the heat exchanger 5 is inserted into the movable part 6, such as... Figure 5As shown; and

[0056] Electromagnet 2 generates magnetism when energized and loses its magnetism when de-energized. It is installed on the outside of cylinder 11 and is driven by driver 3 outside cylinder 11, sliding back and forth along cylinder 11. Figure 5 As shown;

[0057] The heat exchanger 5 includes a first tube sheet 51 and a second tube sheet 52 that are opposite to each other (i.e., located at both ends of the heat exchange tube 53 and used to fix the two ends of the heat exchange tube 53). Several heat exchange tubes 53 are inserted between the first tube sheet 51 and the second tube sheet 52. Each heat exchange tube 53 includes several heat-conducting rings 531 (made of heat-conducting material, which is non-ferromagnetic and can be such as copper tubes) and heat-insulating rings 532 (made of heat-insulating material, which is non-ferromagnetic and can be such as polyurethane foam board) connected between the heat-conducting rings 531. When the heat-conducting rings 531 are in contact with the hot fluid, they absorb the heat of the hot fluid and release the heat into the cold fluid when the cold fluid flows through. The heat-insulating rings 532 can isolate two adjacent heat-conducting rings 531 to prevent the temperature from being conducted to other heat-conducting rings 531 along the heat-conducting rings 531.

[0058] The outer wall of the heat exchange tube 53 is fitted with an insulation sleeve 54 (made of insulation material in the shape of a corrugated pipe, such as...). Figure 7 As shown, secondly, the gap between the heat exchange tube 53 and the insulation sleeve 54 is small, and the insulation sleeve 54 is used to insulate the heat exchange tube 53, thereby separating the hot fluid from the heat exchange tube 53. A small amount of hot fluid will enter the gap between the heat exchange tube 53 and the insulation sleeve 54. The temperature and volume of these hot fluids are limited, and their impact on the heat exchange result is negligible.

[0059] The movable component 6 includes a movable plate 61, which is installed outside the heat exchange tube 53 (the heat exchange tube 53 passes through the movable plate 61). The movable plate 61 is connected to one end of the insulation sleeve 54, and the other end of the insulation sleeve 54 is connected to the second tube sheet 52. Figure 3 and Figure 4 As shown, when the movable plate 61 moves toward the first tube sheet 51, the insulation sleeve 54 located between the second tube sheet 52 and the movable plate 61 is elongated, thereby reducing the "length" of the heat exchange tube 53, as shown. Figures 4 to 3 As shown;

[0060] When the electromagnet 2 is energized, it attracts the magnet 62 on the outside of the movable plate 61. Therefore, when the electromagnet 2 moves, it can drive the movable plate 61 to move together. The two are linked by magnetic attraction, without affecting the internal components of the cylinder 11. In addition, apart from the magnet 62 and the electromagnet 2, all other materials are made of non-magnetic materials.

[0061] In some examples, the actuator 3 includes a lead screw 31 mounted on the outer wall of the cylinder 11, and the lead screw 31 is driven to rotate by a motor 32 outside the cylinder 11, causing the electromagnet 2 to move back and forth along the outer wall of the lifting cylinder 11, such as... Figure 3 and Figure 4 As shown;

[0062] The electromagnet 2 and the lead screw 31 are connected by a thread, so the electromagnet 2 can move back and forth along the lead screw 31 during the rotation of the lead screw 31. The electromagnet 2 is arc-shaped and fits against the outer wall of the cylinder 11 to prevent the electromagnet 2 and the lead screw 31 from rotating synchronously.

[0063] In some examples, the outer wall of the cylinder 11 is equipped with a hot fluid inlet 16 and a hot fluid outlet 17, so that the hot fluid enters the cylinder 11 along the hot fluid inlet 16, circulates in the cylinder 11, and is absorbed by the heat exchange tube 53. The two ends of the cylinder 11 are respectively equipped with a first end cap 12 and a second end cap 13, which are used to correspond to the two ends of the heat exchange tube 53 to facilitate the flow of cold fluid in the heat exchange tube 53.

[0064] The first end cap 12 has a cold fluid inlet 14 installed below it, and the second end cap 13 has a cold fluid outlet 15 installed above it. The cold fluid that needs to be heated enters from the cold fluid inlet 14, is heated by the heat exchange tube 53, and is then discharged from the cold fluid outlet 15.

[0065] In the specific implementation process, the hot fluid enters the cylinder 11 along the hot fluid inlet 16, circulates in the cylinder 11, and comes into contact with the heat exchange tube 53. The heat is absorbed by the heat exchange tube 53. Then, the cold fluid that needs to exchange heat is introduced from the cold fluid inlet 14 into the heat exchange tube 53 on the first tube sheet 51. When the cold fluid flows in the heat exchange tube 53, the cold fluid comes into contact with the inner wall of the heat exchange tube 53 and absorbs the temperature on the heat exchange tube 53. After heat exchange through the heat exchange tube 53, it is discharged from the cold fluid outlet 15, thus forming the heat exchange of the cold fluid.

[0066] When it is necessary to control the temperature of the cold fluid at the outlet, electromagnet 2 is energized, which controls the motor 32 on the outer wall of cylinder 11 to rotate the lead screw 31. Electromagnet 2 is connected to the outside of lead screw 31 and is in close contact with the outer wall of cylinder 11. Therefore, when lead screw 31 rotates, it can drive electromagnet 2 to move along cylinder 11 towards the first tube sheet 51. Figures 4 to 3 As shown, since the electromagnet 2 generates magnetism after being energized, it can attract the magnet block 62 inside the cylinder 11. The magnet block 62 is installed outside the movable plate 61. Therefore, during the movement of the electromagnet 2, the magnet block 62 moves together towards the first tube plate 51 under the attraction of the electromagnet 2. This process does not need to be completed inside the cold fluid, so there is no need to consider the sealing problem.

[0067] Secondly, as the movable plate 61 moves, the heat insulation sleeve 54 connecting the movable plate 61 and the second tube sheet 52 continuously expands, thereby blocking the heat exchange tube 53, such as Figures 4 to 3 As shown, the "effective length" of the heat exchange tube 53 decreases at this time, and the amount of heat that can be exchanged decreases. Therefore, the temperature of the cold fluid drops after heat exchange. When the temperature of the cold fluid after heat exchange reaches a specified value, the control motor 32 stops driving the lead screw 31 to rotate, thereby maintaining the covering position of the insulation sleeve 54. Figure 7 As shown, at this time, with the cold fluid temperature and flow rate remaining constant, the temperature after heat exchange remains constant and is kept at the required temperature, thereby meeting the temperature requirements of different heaters.

[0068] Example 2

[0069] This application effectively solves the technical problem of existing tubular heat exchangers being unable to control the temperature after heat exchange and having to rely on subsequent cooling adjustments. The overall approach is as follows:

[0070] A temperature control assembly 4 is connected between the first end cap 12 and the cold fluid outlet 15;

[0071] The temperature control component 4 includes an auxiliary flow pipe 41, and a flow controller 42 is installed on the outside of the auxiliary flow pipe 41 and inside the cold fluid outlet 15. By mixing the cold fluid before and after heat exchange, the cold fluid discharged from the cold fluid outlet 15 reaches the required temperature. For example, if the temperature of the cold fluid before heat exchange is 0°C and the temperature of the cold fluid after heat exchange is 30°C, when the required temperature is between the two temperatures, such as the required temperature of 20°C, the cold fluid at 0°C and the cold fluid at 30°C are mixed to neutralize the heat and obtain the required 20°C cold fluid.

[0072] In some examples, temperature sensors are installed inside both the first end cap 12 and the second end cap 13 to detect the temperature of the cold fluid before and after heat exchange, so as to facilitate the adjustment of the temperature of the cold fluid.

[0073] In some examples, an impeller and a motor that drives the impeller to rotate are installed on the inner wall of the cold fluid outlet 15. When the cold fluid flows through, it impacts the impeller, causing the impeller to rotate, thereby accelerating the mixing of the cold fluid before and after heat exchange.

[0074] The impeller is located above the connection between the auxiliary flow pipe 41 and the cold fluid outlet 15, which facilitates the mixing of the cold fluid before and after heat exchange.

[0075] In the specific implementation process, the temperature sensors inside the first end cap 12 and the second end cap 13 first detect the temperature of the cold fluid before and after heat exchange. When the required temperature is between the two temperature ranges, the cold fluid before heat exchange (low temperature) and the cold fluid after heat exchange (high temperature) are mixed to neutralize the heat and obtain the cold fluid at the required temperature. For example, the temperature of the cold fluid before heat exchange is 0°C and the temperature of the cold fluid after heat exchange is 30°C. When the required temperature is between the two temperature ranges, such as the required temperature being 20°C, the cold fluid at 0°C and the cold fluid at 30°C are mixed to neutralize the heat and obtain the cold fluid at the required 20°C.

[0076] Example 3

[0077] Based on Embodiments 1 and 2, the embodiments of this application effectively solve the technical problem that existing tubular heat exchangers cannot control the temperature after heat exchange and can only be adjusted by subsequent cooling. The overall idea is as follows:

[0078] Combine the above-described Examples 1 and 2.

[0079] In the specific implementation process, the position of the movable plate 61 is first adjusted by the motor 32 driving the lead screw 31, thereby adjusting the temperature after heat exchange. After completion, refer to Example 1. Then, according to the detected temperature (the temperature of the cold fluid before and after heat exchange), the cold fluid before and after heat exchange is mixed to ensure that the cold fluid flowing out from the cold fluid outlet 15 is kept at the required temperature, thereby meeting the temperature requirements of different heaters.

[0080] Example 4

[0081] Based on Example 1, the embodiments of this application effectively solve the technical problem that existing tubular heat exchangers cannot control the temperature after heat exchange and can only be adjusted by subsequent cooling. The overall idea is as follows:

[0082] A method of using a tubular heat exchanger for a heater, the method comprising the following steps:

[0083] Initial temperature: The temperature at which the cold fluid is discharged;

[0084] Temperature regulation: The heat exchange tube 53 is wrapped with heat insulation material, and the temperature of the cold fluid is observed. The process is stopped when the temperature reaches the specified temperature. The heat insulation material is wrapped from one end of the heat exchange tube 53 to the other end.

[0085] Temperature control: Detects the initial and discharge temperatures of the cold fluid, and mixes the cold fluid before heat exchange with the cold fluid after heat exchange to obtain a cold fluid at a specified temperature.

[0086] After measuring the initial and discharge temperatures of the cold fluid, the volume ratio of the cold fluid before and after heat exchange is controlled according to the required temperature of the cold fluid.

[0087] The formula for the volume ratio of the cold fluid before and after heat exchange when they are mixed is shown below:

[0088] V1:V2 = (t2-T): (T-t1)

[0089] Where V1 represents the volume before heat exchange, t1 represents the temperature before heat exchange, V2 represents the volume after heat exchange, t2 represents the temperature after heat exchange, and T represents the specified temperature.

[0090] In the specific implementation process, firstly, the range of the heat exchange tube 53 covered by the insulation material is adjusted so that the temperature of the cold fluid after heat exchange reaches the automatic value. Secondly, in order to ensure the accuracy of the cold fluid temperature, the temperature of the cold fluid before and after heat exchange is detected. Then, based on the detected temperature (the temperature of the cold fluid before and after heat exchange), the cold fluid before and after heat exchange is mixed to ensure that the cold fluid flowing out from the cold fluid outlet 15 is kept at the required temperature, thereby meeting the temperature requirements of different heaters.

[0091] For example, the temperature of the cold fluid before heat exchange is 0°C, and the temperature of the cold fluid after heat exchange is 30°C. When the required temperature is between the two temperatures, such as when the required temperature is 20°C, the cold fluid at 0°C and the cold fluid at 30°C are mixed.

[0092] V1:V2 = (t2-T): (T-t1)

[0093] Where V1 represents the volume before heat exchange, t1 represents the temperature before heat exchange, V2 represents the volume after heat exchange, t2 represents the temperature after heat exchange, and T represents the specified temperature.

[0094] t1=0℃, t2=30℃, T=20℃, substitute into the formula;

[0095] V1:V2=(30-20):(20-0);

[0096] V1:V2=1:2, so we only need to mix the cold fluids before and after heat exchange in a 1:2 ratio to neutralize the heat and obtain the required 20℃ cold fluid.

[0097] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A tube heat exchanger for a heater, characterized by, The tube heat exchange device comprises: a cylinder (11) having a heat exchange element (5) installed inside; a movable element (6) installed inside the cylinder (11); and an electromagnet (2) installed outside the cylinder (11), and the electromagnet (2) is driven by a driver (3) outside the cylinder (11) to slide back and forth along the cylinder (11); wherein the heat exchange element (5) comprises a first tube plate (51) and a second tube plate (52) opposite to each other, and a plurality of heat exchange tubes (53) are inserted between the first tube plate (51) and the second tube plate (52), the heat exchange tubes (53) comprise a plurality of heat-conducting rings (531) and a plurality of heat-insulating rings (532) connected between the heat-conducting rings (531); an outer wall of the heat exchange tube (53) is sleeved with a temperature insulation sleeve (54), and the temperature insulation sleeve (54) is used for temperature insulation of the heat exchange tube (53); the movable element (6) comprises a movable plate (61) installed outside the heat exchange tube (53), one end of the movable plate (61) is connected with the temperature insulation sleeve (54), and the other end of the temperature insulation sleeve (54) is connected with the second tube plate (52); the electromagnet (2) in the energized state is attracted to a magnet block (62) outside the movable plate (61).

2. A tube heat exchanger for a heater as claimed in claim 1, characterized in that: The driver (3) comprises a lead screw (31) installed on the outer wall of the cylinder (11), and the lead screw (31) is driven to rotate by a motor (32) outside the cylinder (11); wherein the electromagnet (2) and the lead screw (31) are connected by threads, and the electromagnet (2) is attached to the outer wall of the cylinder (11).

3. A tube heat exchanger for a heater as defined in claim 1, characterized in that: The outer wall of the cylinder (11) is installed with a hot fluid inlet (16) and a hot fluid outlet (17), and the two ends of the cylinder (11) are respectively installed with a first head (12) and a second head (13); wherein the lower part of the first head (12) is installed with a cold fluid inlet (14), and the upper part of the second head (13) is installed with a cold fluid outlet (15).

4. A tube heat exchanger for a heater as claimed in claim 3, wherein: The first head (12) and the cold fluid outlet (15) are connected with a temperature adjusting assembly (4); wherein the temperature adjusting assembly (4) comprises an auxiliary flow pipe (41), and the outer part of the auxiliary flow pipe (41) and the inner part of the cold fluid outlet (15) are both installed with a flow controller (42).

5. A tube heat exchanger for a heater as defined in claim 3, characterized in that: The inner parts of the first head (12) and the second head (13) are both installed with a temperature sensor.

6. A tube heat exchanger for a heater as defined in claim 3, characterized in that: The inner wall of the cold fluid outlet (15) is installed with an impeller and a motor driving the impeller to rotate; wherein the impeller is located above the connection between the auxiliary flow pipe (41) and the cold fluid outlet (15).

7. A method of using a tube heat exchanger for a heater as claimed in any one of claims 1 to 6, wherein, The method comprises the following steps: initial temperature: detecting the temperature when the cold fluid is discharged; temperature adjustment: wrapping the outer wall of the heat exchange tube (53) with a temperature insulation material, and observing the temperature when the cold fluid is discharged, and stopping when the temperature reaches a specified temperature.

8. A method of using a tube heat exchanger for a heater as defined in claim 7, wherein, During the temperature adjustment process, the temperature insulation material is wrapped from the end of the heat exchange tube (53) to the other end.

9. A method of using a tube heat exchanger for a heater as defined in claim 7, wherein, The method further comprises: temperature control: detecting the initial and discharge temperatures of the cold fluid, mixing the cold fluid before heat exchange with the cold fluid after heat exchange to obtain cold fluid of a specified temperature.

10. A method of using a tube heat exchanger for a heater as defined in claim 9, wherein, In the temperature control step, after measuring the temperature of the cold fluid at the initial and at the discharge, the volume ratio at the mixing of the cold fluid before heat exchange and the cold fluid after heat exchange is controlled according to the temperature of the cold fluid required; The volume ratio at the mixing of the cold fluid before heat exchange and the cold fluid after heat exchange is as follows: V1:V2=(t2-T):(T-t1) Wherein, V1 represents the volume before heat exchange, t1 represents the temperature before heat exchange, V2 represents the volume after heat exchange, t2 represents the temperature after heat exchange, and T represents the specified temperature.

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