Temperature-regulated hybrid heat exchanger

Abstract

The application relates to a temperature-adjusted mixed heat exchanger, wherein a temperature sensor is arranged on a hot fluid inlet pipeline, a thermometer is arranged downstream of a hot fluid inlet pipeline flow adjusting device, the temperatures of the hot fluid and the mixed heat exchanged fluid are respectively detected, when the measured hot fluid temperature decreases, the controller controls the opening of the hot fluid flow adjusting device to increase, so as to increase the quantity of the entered hot fluid, and the heat exchange quantity requirement is met; when the detected hot fluid temperature increases, the controller controls the opening of the hot fluid flow adjusting device to decrease, so as to decrease the quantity of the entered hot fluid. The application can realize the energy-saving requirement through the above adjustment, avoids heat waste, and can meet the heat exchange requirement in time.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, and more specifically to a temperature-regulating mixing heat exchanger. Background Technology

[0002] Hybrid heat exchangers rely on direct contact between cold and hot fluids for heat transfer. This method avoids the thermal resistance of fouling on the heat transfer walls and both sides. As long as the contact between the fluids is good, there is a large heat transfer rate. Currently, they are mainly divided into water-water hybrid heat exchangers and steam-water hybrid heat exchangers. Water-water hybrid heat exchangers are widely used because they are inexpensive, energy-saving, environmentally friendly, and have high conversion efficiency.

[0003] Fluid stability and accuracy are crucial in hybrid heat exchangers. However, uneven flow velocity within the pipes is a common problem. Current solutions focus on improving the accuracy of measuring instruments and installing additional flow equalization devices, but they do not fundamentally solve the problem caused by uneven upstream heat flow. Furthermore, installing additional flow equalization devices complicates the three-dimensional piping structure, increases costs, and introduces significant pressure drops, further increasing operating costs.

[0004] Therefore, based on the above problems, a new type of flow equalization device is needed. The flow equalization of the prism pipe needs to be improved to improve the flow field and temperature field at the measuring device under the premise of smaller pressure loss, thereby improving the heat exchange efficiency of the heat exchanger.

[0005] The hybrid heat exchangers used in the prior art employ methods such as spraying to ensure uniform heat exchange and improve heat exchange efficiency. However, the spraying structure increases costs and has the main drawback of not being able to adjust the temperature to a specific range according to actual needs, thus limiting the scope of application. Some heat exchangers that integrate precision detection instruments such as sensors are too expensive to be widely used. In addition, when the heat exchanger malfunctions and cannot exchange heat with cold water, it can easily lead to burns to users.

[0006] Therefore, based on the above problems, a heat exchange device is needed that can regulate the flow rate of the fluid channels to ensure a uniform overall heat exchange output temperature and meet different needs. Summary of the Invention

[0007] To address the aforementioned problems, the purpose of this invention is to provide a heat exchanger that regulates temperature, achieves energy-saving requirements, avoids heat waste, and simultaneously meets heat exchange requirements in a timely manner, thereby improving heat exchange efficiency.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A temperature-regulating heat exchanger includes a hot fluid inlet pipe, a cold fluid inlet pipe, and a heat exchange fluid outlet pipe. The cold fluid inlet pipe is perpendicular to both the hot fluid inlet pipe and the heat exchange fluid outlet pipe, positioned between them. A flow regulating device is installed in the hot fluid inlet pipe. A temperature sensor is installed in the hot fluid inlet pipe, and a thermometer is installed downstream of the flow regulating device to detect the temperatures of the hot fluid and the mixed heat exchange fluid. When the measured hot fluid temperature decreases, the controller increases the opening of the flow regulating device, thereby increasing the amount of hot fluid entering to meet the heat exchange requirements. Conversely, when the measured hot fluid temperature increases, the controller decreases the opening of the flow regulating device, thereby reducing the amount of hot fluid entering.

[0010] As an improvement, when the detected temperature of the heat-exchange fluid is lower than the preset value, the controller increases the opening of the cold fluid flow regulating device and decreases the opening of the hot fluid flow regulating device, thereby increasing the amount of hot fluid entering and reducing the amount of cold fluid.

[0011] As an improvement, when the detected hot fluid temperature is higher than a predetermined value, the controller controls the opening of the cold fluid flow regulating device to decrease and the opening of the hot fluid flow regulating device to increase, thereby reducing the amount of hot fluid entering and increasing the amount of cold fluid.

[0012] As an improvement, the flow regulating device is a grid structure, which is provided with multiple grid plates, and the grid plates are arranged perpendicular to the central axis of the cold fluid inlet pipe.

[0013] As an improvement, the adjacent grilles are configured as a split-opening adjustable structure.

[0014] As an improvement, the distribution density of the flow regulating device's grid increases with increasing distance from the cold fluid inlet.

[0015] As an improvement, the distribution density of the flow regulating device grid increases significantly as the distance to the cold fluid inlet increases.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1) The present invention can achieve energy-saving requirements and avoid heat waste through the above-mentioned adjustment, while meeting heat exchange requirements in a timely manner.

[0018] 2) Based on existing heat exchangers, a hybrid heat exchanger with flow regulation, rectification and flow equalization functions is creatively proposed. By setting grid plates and setting different angles of the grid plates, the overall heat exchange efficiency is improved.

[0019] 3) Based on existing heat exchangers, a hybrid heat exchanger with flow regulation, rectification, and flow equalization functions is creatively proposed. It includes two opposing flow regulation devices at the upstream and downstream ends, enabling dual control and dual flow equalization. This addresses the problem at its source: uneven inlet flow velocity. The flow equalization effect is significant, improving the accuracy and stability of inlet flow and temperature measurements, thereby enhancing the economy and stability of the heat exchange system. Furthermore, this device has a simple structure, avoiding the excessive pressure drop and increased operating costs associated with the additional flow equalization devices in existing technologies, thus offering high economic benefits. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the hybrid heat exchanger of the present invention;

[0021] Figure 2 A partial three-dimensional structural schematic diagram of the hybrid heat exchanger provided by the present invention is shown;

[0022] Figure 3 A schematic diagram of the grid structure of the present invention is shown;

[0023] Figure 4 The bi-slit grid structure of the present invention is shown. Detailed Implementation

[0024] The technical solutions in the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1-4 A schematic diagram of the hybrid heat exchanger structure of the present invention is shown. Figure 1 As shown, a mixing heat exchanger is used for direct mixing and heat exchange of hot and cold fluids. It includes a hot fluid inlet pipe 1, a cold fluid inlet pipe 2, and a heat exchange fluid outlet pipe 3. Figure 1 As shown, the cold fluid inlet pipe 2 is perpendicular to the hot fluid inlet pipe 1 and the heat exchange fluid outlet pipe 3. The cold fluid inlet pipe 2 is located between the hot fluid inlet pipe 1 and the heat exchange fluid outlet pipe 3. A flow regulating device 4 is installed in the hot fluid inlet pipe 1. Figure 2 As shown, the flow regulating device is a grid structure, which is provided with multiple grid plates, which are arranged perpendicular to the central axis of the cold fluid inlet pipe.

[0026] The hot fluid inlet pipe 1 is located upstream, the heat exchange fluid outlet pipe 3 is located downstream, and the cold fluid inlet pipe 2 is set in the intermediate pipe between the hot fluid inlet pipe 1 and the heat exchange fluid outlet pipe 3 and extends outward from the intermediate pipe. The hot fluid inlet pipe 1 and the heat exchange fluid outlet pipe 3 are respectively equipped with an inlet flow regulating device 4 and an outlet flow regulating device 5. The cold fluid inlet pipe 2 is equipped with a cold fluid flow regulating device 6. The cold fluid inlet pipe 2 is set in the pipe between the inlet flow regulating device 4 and the outlet flow regulating device 5. The inlet flow regulating device 4 and the outlet flow regulating device 5 are multi-grid structures.

[0027] Based on existing heat exchangers, a novel inlet flow regulation system with flow control, rectification, and flow equalization functions is proposed. This system comprises two opposing regulating devices, upstream and downstream, enabling dual control and dual flow equalization. It addresses the root cause of uneven inlet fluid velocity, resulting in significant flow equalization and improved accuracy and stability of inlet flow and temperature measurements. This, in turn, enhances the economy and stability of the heat exchange system. Furthermore, the device's simple structure avoids the excessive pressure drop and increased operating costs associated with additional flow equalization devices in existing technologies, offering high economic benefits.

[0028] The adjacent grid plates of the flow regulating device 4 have different tilt angles. As the distance from the cold fluid inlet pipe increases, the angle between the grid plate and the direction of cold fluid flow in the direction of the central axis of the cold fluid inlet pipe becomes larger and larger.

[0029] Near the cold fluid inlet, the cold fluid flow rate is at its maximum, resulting in the largest heat exchange temperature difference and optimal heat exchange. However, this leads to uneven heat exchange overall. Heat exchange is best at the cold fluid outlet, decreasing with distance from the outlet, resulting in poor overall heat exchange performance, similar to a co-current heat exchanger. Furthermore, the cold fluid flow rate decreases with distance from the inlet. This invention addresses this by improving the grid angle, ensuring that the hot fluid flow rate increases along the direction of the cold fluid inlet channel, resulting in more balanced heat exchange across the entire heat exchange area. This achieves a technical effect similar to counter-current heat exchange, thus improving overall heat exchange efficiency.

[0030] Preferably, as the distance from the cold fluid inlet pipe increases, the angle between the grid plates and the direction of cold fluid flow along the central axis of the cold fluid inlet pipe gradually increases. This variation in angle can improve heat exchange efficiency and achieve more uniform overall heat exchange.

[0031] Preferably, the heat exchange fluid outlet pipe is equipped with an outlet flow regulating device 5. This flow regulating device is a grid structure with multiple grid plates arranged parallel to the central axis of the cold fluid inlet pipe. When the flow regulating device is partially open, each set of two opposing grid plates can guide the flow to both sides. Flow regulating device 4 allows the flow velocity to diffuse horizontally, while flow regulating device 5 allows it to diffuse vertically. When flow regulating devices 4 and 5 are combined, because the two sets of fluid gates are perpendicular to each other, the flow can diffuse in all four directions (horizontal and vertical), resulting in a higher degree of homogenization.

[0032] Preferably, the system also includes a main pipeline that carries hot fluid. Multiple hot fluid inlet pipes 1 are connected in parallel to the main pipeline. Along the flow direction of the hot fluid within the main pipeline, the angle between the hot fluid flow regulating device 4 and the grid in the fluid flow regulating device 5 within the hot fluid inlet pipe 1 increases. Because the increasing angle of the grid reduces flow resistance, it ensures that the flow rate entering the hot fluid inlet pipe 1 remains uniform along the flow direction of the hot fluid within the main pipeline, preventing excessive flow in the upstream hot fluid inlet pipe 1 and insufficient flow at the downstream end.

[0033] Preferably, along the flow direction of the hot fluid in the main pipeline, the angle between the hot fluid flow regulating device 4 and the grid in the fluid flow regulating device 5 in the hot fluid inlet pipe gradually increases. By changing the angle, the uniformity of the flow distribution can be further ensured.

[0034] Preferably, multiple hot fluid inlet pipes 1 are connected in parallel to the main pipeline. Along the flow direction of the hot fluid in the main pipeline, the distribution density of the grids in the hot fluid flow regulating device 4 and the fluid flow regulating device 5 in the hot fluid inlet pipes gradually decreases. Because the flow resistance decreases due to the decreasing grid distribution density, it ensures that the flow rate entering the hot fluid inlet pipe 1 along the flow direction of the hot fluid in the main pipeline remains uniform, avoiding excessive flow in the upstream hot fluid inlet pipe 1 and insufficient flow at the downstream end.

[0035] Preferably, along the flow direction of the hot fluid in the main pipeline, the distribution density angle of the grid in the hot fluid inlet pipe of the hot fluid flow regulating device 4 and the fluid flow regulating device 5 gradually decreases. By changing the amplitude, the uniformity of the flow distribution can be further ensured.

[0036] Temperature sensors are installed in the hot fluid pipeline, and thermometers are installed downstream of the flow regulating device 5 in the hot fluid inlet pipeline 1 to detect the temperature of the hot fluid and the mixed heat-exchange fluid, respectively.

[0037] Preferably, a hot fluid flow meter is installed upstream of the flow regulating device 4 of the hot fluid inlet pipe 1 to measure the amount of hot fluid entering the hot fluid inlet pipe 1, and a cold fluid flow meter is installed on the cold fluid pipe to measure the flow rate of the cold fluid.

[0038] Preferably, when the measured hot fluid flow rate is lower than a preset value, the controller increases the opening of the hot fluid flow rate regulating device 4, thereby increasing the amount of hot fluid entering. When the detected hot fluid flow rate is higher than a preset value, the controller decreases the opening of the hot fluid flow rate regulating device 4, thereby reducing the amount of hot fluid entering.

[0039] Preferably, when the measured temperature of the hot fluid decreases, the controller increases the opening of the hot fluid flow regulating device 4, thereby increasing the amount of hot fluid entering to meet the heat exchange requirements. When the detected temperature of the hot fluid increases, the controller decreases the opening of the hot fluid flow regulating device 4, thereby reducing the amount of hot fluid entering. This adjustment achieves energy savings, avoids heat waste, and ensures timely fulfillment of heat exchange requirements.

[0040] Preferably, when the detected temperature of the heat-exchanged fluid is lower than a preset value, the controller increases the opening of the cold fluid flow regulating device 5 and decreases the opening of the hot fluid flow regulating device 4, thereby increasing the amount of hot fluid entering and decreasing the amount of cold fluid. When the detected temperature of the hot fluid is higher than a preset value, the controller decreases the opening of the cold fluid flow regulating device 5 and increases the opening of the hot fluid flow regulating device 4, thereby decreasing the amount of hot fluid entering and increasing the amount of cold fluid. Through these adjustments, energy-saving requirements can be achieved, heat waste can be avoided, and heat exchange requirements can be met in a timely manner.

[0041] Preferably, when the detected temperature of the heat-exchanged fluid is higher than a preset value, the controller increases the opening of the cold fluid flow regulating device 5, thereby increasing the amount of cold fluid entering to meet the heat exchange requirements. When the detected temperature of the heat-exchanged fluid is lower than the preset value, the controller decreases the opening of the cold fluid flow regulating device 5, thereby reducing the amount of cold fluid entering to meet the heat exchange requirements. This adjustment achieves energy savings, avoids heat waste, and ensures timely fulfillment of heat exchange requirements.

[0042] The flow regulating device with a split grille structure adjusts the fluid flow rate by changing the angle between the grille and the central axis of the cold fluid inlet pipe.

[0043] Preferably, a mixing device 7 is provided downstream of the outlet flow regulating device. The mixing device is a grid structure, which includes multiple grids, and adjacent grids are a split-opening regulating structure.

[0044] Preferably, multiple mixing devices are provided. The mixing mechanism grid includes parallel structures arranged parallel to the central axis of the cold fluid inlet pipe and vertical structures arranged perpendicular to the central axis of the cold fluid inlet pipe, with the parallel and vertical structures alternating. After the mixing devices are combined, because the two sets of fluid gates are perpendicular to each other, the flow can be diffused in all four directions, both horizontally and vertically, resulting in a higher degree of homogenization.

[0045] When adjacent grilles are not arranged in a split configuration, the angle between the grille and the central axis of the cold fluid inlet pipe is chosen to be the angle formed by the direction of cold fluid flow and the downstream extension of the grille. For example... Figure 3 .

[0046] Preferably, the adjacent grilles are a split-opening adjustable structure. Unless otherwise specified, the following description refers to grilles with a split-opening structure for adjacent grilles.

[0047] Fluid flow needs to be controlled. The split-type regulating fluid gate of this invention has both flow equalization and flow regulation functions. Previously, ordinary fluid gates (fluid gates facing one direction) were generally used to control flow, with orifice plates used for flow equalization. However, ordinary fluid gates divert hot fluid from one side to the other, exacerbating flow turbulence within the pipe. Orifice plates, on the other hand, significantly reduce the flow area, resulting in higher resistance.

[0048] As long as the double-leaf fluid gate is not nearly closed, it has little impact on the flow area. The grille of the double-leaf fluid gate causes the fluid to flow around the sides of the grille, rather than being guided to one side as in ordinary fluid gates. This process applies some resistance to the flow, reducing the flow velocity in areas of higher velocity and inducing the fluid to flow through areas of lower velocity. In particular, using two sets of mutually perpendicular double-leaf fluid gates provides better flow equalization. Furthermore, changing the angle of the double-leaf fluid gate grille (the angle between the grille and the axis of the cold fluid pipe) can also regulate the flow rate.

[0049] Preferably, the cold fluid flow regulating device has a multi-grid structure, with adjacent grids having a split-open regulating structure. By setting the split-open regulating structure, the input cold fluid can be made more uniform.

[0050] Preferably, the inlet flow rate regulating device 4, the cold fluid flow rate regulating device 6, and the outlet flow rate regulating device 5 are adjusted independently of each other. When the fluid gate opening is different, the flow resistance is different, and the flow equalization effect is also different. When the equipment can withstand a larger flow resistance, a smaller fluid gate opening can be used to achieve a better flow equalization effect.

[0051] Preferably, in the multi-leaf split-opening adjustment, each grille can have its angle independently controlled, preferably by a servo motor, making its opening angle independently adjustable. When the local flow velocity is too high, nearby grilles can adopt a smaller angle, thereby increasing local resistance and causing the gas to move in the direction of lower flow velocity, further improving the uniformity of the flow field. Each grille's opening angle is controlled by a servo motor.

[0052] Preferably, the width of each grid in the multi-leaf split-flow regulating device can be determined according to the actual fluid distribution in the pipeline. Preferably, the pipeline diameter is 9-11 times the grid spacing, more preferably 10 times. These dimensions result in a significant flow equalization effect, improving the accuracy and stability of inlet flow and temperature measurements, thereby enhancing the economy and stability of the combustion system. Furthermore, the device has a simple structure, avoiding the excessive pressure drop and increased operating costs associated with the additional installation of flow equalization devices in existing flow equalization technologies, thus offering high economic benefits.

[0053] Furthermore, the flow regulation system, due to its split configuration, not only has flow regulation function but also rectification and flow equalization functions.

[0054] Furthermore, the flow regulation system can achieve dual control and dual flow equalization to achieve better flow equalization. The hot fluid from the hot fluid inlet pipe first passes through the inlet flow regulation device. After passing through the flow regulation device, its rectification effect makes the velocity distribution of the hot fluid more uniform. Then the cold fluid is introduced. Due to the difference in temperature and velocity of the cold fluid, the velocity and temperature of the mixed fluid are uneven. The mixed fluid passes through the second multi-leaf split flow regulation device again. After passing through the second flow regulation device, better velocity and temperature uniformity distribution can be achieved.

[0055] Furthermore, in the multi-leaf split-flow regulating device, the angle of each grille is independently adjustable. Preferably, the opening angle of each grille is controlled by a servo motor. Since the pressure loss caused by the grilles at different opening angles is different, the rectification and flow equalization effects are different. Since the hot fluid main pipe and the hot fluid inlet pipe form a T-shaped structure, the inflowing hot fluid itself has uneven velocity. Therefore, the grille angle can be finely adjusted according to the velocity distribution of the incoming hot fluid.

[0056] Preferably, a / A = ф*(VV) p ) / V p Where 'a' is the changing angle of the grid plate, and 'V' is the local velocity near the grid plate. p Let be the cross-sectional average velocity, and angle A be the current angle of the grid plate. Where ф is a parameter, using the following data:

[0057] 0 <A<=30°,0.55<ф<0.60;

[0058] 30 <A<=60°,0.45<ф<0.55;

[0059] 60 <A<90°,0.40<ф<0.45;

[0060] The maximum value of A is 90°.

[0061] As a preferred option, ф decreases as A increases.

[0062] When the angle of the grid plates is small (tending to a closed state), the flow resistance is high; conversely, when the angle of the grid plates is large (tending to open), the flow resistance is low. If the flow velocity is high in a certain area, the nearby grid plates should use a small angle (tending to a closed state) to induce the fluid to flow towards the area with a larger grid plate angle, thus achieving a flow equalization effect. If all grid plates have the same angle, although a flow equalization effect can still be achieved, the effect is less pronounced.

[0063] The formulas and parameters described above in this invention are the optimal angle adjustment parameters obtained through a large number of experiments and numerical simulations. By adjusting the angles described above, the best flow uniformity effect can be achieved with minimal resistance.

[0064] Preferably, a velocity probe, such as a Pitot tube, is placed near each grid plate. The opening angle is the angle between the grid and the axis of the cold fluid pipe. Figure 4 As shown.

[0065] When adjacent grilles are arranged in a split configuration, the angle between the grille and the central axis of the cold fluid inlet pipe (i.e., the grille angle) should be an acute angle, such as... Figure 4 As shown.

[0066] Furthermore, the width of each grid in the multi-leaf split flow regulating device can be determined according to the actual fluid distribution in the pipeline. Preferably, the width is equal to the grid spacing, and the grid spacing is equal to the pipeline diameter / 10. This is because different grid sizes will result in different pressure losses and different rectification and flow equalization effects. The width can be determined according to the velocity and temperature distribution of the incoming fluid to achieve a better flow equalization effect.

[0067] As an improvement, the angle of the grid in the flow regulating device 4 increases with increasing distance from the cold fluid inlet. Near the cold fluid inlet, the cold fluid flow rate is maximum, resulting in the largest heat exchange temperature difference and optimal heat exchange. This leads to uneven heat exchange overall, with the best heat exchange occurring at the cold fluid outlet. Heat exchange deteriorates with distance from the outlet, resulting in poor overall heat exchange performance, similar to a co-current heat exchanger. Furthermore, the cold fluid flow rate decreases with distance from the cold fluid inlet. This invention improves the grid angle so that the hot fluid flow rate increases along the direction of the cold fluid inlet channel, resulting in more balanced heat exchange across the entire heat exchange area, achieving a technical effect similar to counter-current heat exchange and improving overall heat exchange efficiency.

[0068] Preferably, the angle of the flow regulating device 4 grid increases progressively as the distance to the cold fluid inlet decreases. This variation in angle improves heat exchange efficiency and achieves more uniform overall heat exchange.

[0069] As an improvement, the size of the grid in the flow regulating device 4 increases with increasing distance from the cold fluid inlet. Near the cold fluid inlet, the cold fluid flow rate is at its maximum, resulting in the largest heat exchange temperature difference and optimal heat exchange. This leads to uneven heat exchange overall, with the best heat exchange occurring at the cold fluid outlet. Heat exchange deteriorates with distance from the outlet, resulting in poor overall heat exchange performance, similar to a co-current heat exchanger. Furthermore, the cold fluid flow rate decreases with distance from the inlet. This invention improves the grid size by varying it along the direction of the cold fluid inlet channel. The grid size is largest near the inlet, resulting in maximum resistance and reduced flow. Consequently, the flow rate increases with distance from the outlet, achieving a more balanced heat exchange across the entire heat exchange area, creating a counter-current heat exchange effect and improving overall heat exchange efficiency.

[0070] Preferably, the size of the grid in the flow regulating device 4 increases progressively with increasing distance from the cold fluid inlet. This variation in size improves heat exchange efficiency and achieves more uniform overall heat exchange.

[0071] As an improvement, the distribution density of the grids in the flow regulating device 4 increases with increasing distance from the cold fluid inlet. Near the cold fluid inlet, the cold fluid flow rate is maximum, resulting in the largest heat exchange temperature difference and optimal heat exchange. This leads to uneven heat exchange overall, with the best heat exchange at the cold fluid outlet. Heat exchange deteriorates with distance from the outlet, resulting in poor overall heat exchange performance, similar to a co-current heat exchanger. Furthermore, the cold fluid flow rate decreases with distance from the inlet. This invention improves the grid distribution density by varying it along the direction of the cold fluid inlet channel. The grid distribution is largest near the cold fluid inlet, resulting in maximum resistance and reduced flow. Consequently, the flow rate increases with distance from the cold fluid outlet, achieving a more balanced heat exchange across the entire heat exchange area, creating a counter-current heat exchange effect and improving overall heat exchange efficiency.

[0072] Preferably, the distribution density of the grid in the flow regulating device 4 increases progressively with increasing distance from the cold fluid inlet. This variation in distribution density improves heat exchange efficiency and achieves more uniform overall heat exchange.

[0073] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A temperature-regulating mixing heat exchanger, comprising a hot fluid inlet pipe, a cold fluid inlet pipe, and a heat exchange fluid outlet pipe, wherein the cold fluid inlet pipe is arranged perpendicularly to the hot fluid inlet pipe and the heat exchange fluid outlet pipe, the cold fluid inlet pipe is disposed between the hot fluid inlet pipe and the heat exchange fluid outlet pipe, and a flow regulating device is disposed in the hot fluid inlet pipe; characterized in that, A temperature sensor is installed in the hot fluid inlet pipe, and a thermometer is installed downstream of the hot fluid inlet pipe flow regulating device to detect the temperature of the hot fluid and the fluid after heat exchange. When the measured hot fluid temperature decreases, the controller increases the opening of the hot fluid flow regulating device, thereby increasing the amount of hot fluid entering to meet the heat exchange requirements; when the measured hot fluid temperature increases, the controller decreases the opening of the hot fluid flow regulating device, thereby reducing the amount of hot fluid entering. The flow regulating device is a grid structure with multiple grid plates, which are arranged perpendicular to the central axis of the cold fluid inlet pipe. Adjacent grid plates are in a split-opening adjustment structure. The distribution density of the grid plates of the flow regulating device increases as the distance to the cold fluid inlet increases.

2. The temperature-regulating heat exchanger as described in claim 1, characterized in that, When the temperature of the heat-exchange fluid is lower than the preset value, the controller increases the opening of the cold fluid flow regulating device and decreases the opening of the hot fluid flow regulating device, thereby increasing the amount of hot fluid entering and decreasing the amount of cold fluid.

3. The temperature-regulating heat exchanger as described in claim 2, characterized in that, When the detected hot fluid temperature is higher than the predetermined value, the controller controls the opening of the cold fluid flow regulating device to decrease and the opening of the hot fluid flow regulating device to increase, thereby reducing the amount of hot fluid entering and increasing the amount of cold fluid.

4. The heat exchanger as described in claim 1, characterized in that, As the distance to the cold fluid inlet increases, the distribution density of the grid plates in the flow regulating device increases significantly.

5. The heat exchanger as described in claim 1, characterized in that, The heat exchange fluid outlet pipe is equipped with an outlet flow regulating device, which is a grid structure.

Images