Mixed heat exchanger capable of adjusting temperature

Abstract

The invention relates to a mixed heat exchanger capable of adjusting temperature, which is characterized in that a temperature sensor is arranged on a hot fluid inlet pipeline, a thermometer is arranged on the downstream of a flow adjusting device of the hot fluid inlet pipeline, and the temperatures of hot fluid and fluid subjected to mixed heat exchange are respectively detected; the controller controls the opening degree of the hot fluid flow adjusting device to be increased, so that the amount of entering hot fluid is increased, and the heat exchange requirement is met. When the detected temperature of the hot fluid is increased, the controller controls the opening degree of the hot fluid flow adjusting device to be reduced, and therefore the number of the entering hot fluid is reduced. Through the adjustment, the energy-saving requirement can be met, heat waste is avoided, and meanwhile the heat exchange requirement can be met in time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchangers, in particular to a mixed heat exchanger for adjusting temperature. BACKGROUND

[0002] The mixed heat exchanger is to rely on the direct contact of cold and hot fluids to conduct heat, and this heat transfer mode avoids the heat transfer wall and the dirt resistance on both sides thereof, so that a larger heat transfer rate is obtained as long as the contact between the fluids is good, and at present, the mixed heat exchanger is mainly divided into water-water mixed type and steam-water mixed type, and the water-water mixed type is widely used due to low cost, energy saving and environmental protection and high conversion efficiency.

[0003] The fluid stability and accuracy of the mixed heat exchanger are crucial. However, the mixed heat exchanger generally has the problem of uneven flow rate in the pipe. However, the current solution focuses on improving the accuracy of measuring instruments and installing more flow uniformizing devices, and does not fundamentally solve the problem caused by uneven upstream hot fluid, and the installation of more flow uniformizing devices makes the three-dimensional pipe structure complex, increases the cost and causes a large pressure drop, thereby increasing the operating cost.

[0004] Therefore, based on the above problems, a new flow uniformizing device is needed, and the prism pipe needs to be improved for flow uniformization, so as to improve the flow field and temperature field state of the measuring device under the premise of small pressure loss, and improve the heat exchange efficiency of the heat exchanger.

[0005] The mixed heat exchanger used in the prior art adopts a spraying structure and the like to make the heat exchange uniform and improve the heat exchange efficiency during use, but the spraying structure and the like increase the cost, cannot adjust the temperature in a specific range according to actual needs, and has the disadvantages of limited use range, high cost of heat exchangers integrated with precise detection instruments, and the like, so that the heat exchangers cannot be widely used, and when the heat exchanger fails and cannot exchange heat with cold water, the user is easily scalded.

[0006] Therefore, based on the above problems, a heat exchange device is needed, which adjusts the flow of the fluid channel through the flow regulating device, so that the overall heat exchange output temperature is balanced and different requirements are met. SUMMARY

[0007] In view of the above problems, the present application aims to provide a heat exchanger for adjusting temperature, which can meet the energy saving requirement, avoid heat waste, meet the heat exchange requirement in time, and improve the heat exchange efficiency.

[0008] To achieve the above purpose, the present application adopts the following technical scheme: The application discloses a temperature-adjustable heat exchanger which comprises a hot fluid inlet pipe, a cold fluid inlet pipe and a heat exchange fluid outlet pipe, wherein the cold fluid inlet pipe is vertically arranged between the hot fluid inlet pipe and the heat exchange fluid outlet pipe, and a flow adjusting device is arranged in the hot fluid inlet pipe; a temperature sensor is arranged in the hot fluid inlet pipe, and a thermometer is arranged downstream of the flow adjusting device of the hot fluid inlet pipe to detect the temperature of the hot fluid and the mixed heat exchange fluid respectively; when the measured temperature of the hot fluid decreases, the controller controls the opening of the flow adjusting device of the hot fluid to increase, so as to increase the amount of the entering hot fluid to meet the heat exchange requirement; when the measured temperature of the hot fluid increases, the controller controls the opening of the flow adjusting device of the hot fluid to decrease, so as to decrease the amount of the entering hot fluid.

[0009] As an improvement, when the temperature of the mixed heat exchange fluid is lower than a preset value, the controller controls the opening of the flow adjusting device of the cold fluid to increase, and the opening of the flow adjusting device of the hot fluid to decrease, so as to increase the amount of the entering hot fluid and decrease the amount of the entering cold fluid.

[0010] As an improvement, when the temperature of the hot fluid is higher than a preset value, the controller controls the opening of the flow adjusting device of the cold fluid to decrease, and the opening of the flow adjusting device of the hot fluid to increase, so as to decrease the amount of the entering hot fluid and increase the amount of the entering cold fluid.

[0011] As an improvement, the flow adjusting device is a grid structure which comprises a plurality of grid pieces arranged perpendicularly to the central axis of the cold fluid inlet pipe.

[0012] As an improvement, the adjacent grid pieces are of a split adjusting structure.

[0013] As an improvement, the distribution density of the grid pieces of the flow adjusting device increases with the distance from the cold fluid inlet pipe.

[0014] As an improvement, the increasing range of the distribution density of the grid pieces of the flow adjusting device increases with the distance from the cold fluid inlet pipe.

[0015] Compared with the prior art, the application has the following advantages: 1) The application can realize energy-saving requirement, avoid heat waste and meet the heat exchange requirement in time through the above-mentioned adjustment.

[0016] 2) The application creatively proposes a mixed heat exchanger with flow adjusting, rectifying and equalizing functions on the basis of the prior art heat exchanger, the grid pieces are arranged and the angles of the grid pieces are different, so that the overall heat exchange efficiency is improved.

[0017] 3) On the basis of the existing heat exchanger, a mixed heat exchanger with flow regulating function and flow regulating and equalizing function is creatively proposed, which contains two upstream and downstream flow regulating devices that can realize double control and double equalization of flow, solves the problem from the source of uneven inlet flow velocity, has obvious equalization effect, can improve the accuracy and stability of inlet flow and temperature measurement, and further improve the economy and stability of the heat exchange system. And the device has simple structure, avoids the problem of excessive pressure drop and increased operation cost caused by additional installation of flow equalizing device in existing flow equalizing technology, and has high economic benefit. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The mixed heat exchanger is a whole structure schematic diagram of the present application. Figure 2 The partial three-dimensional structure schematic diagram of the mixed heat exchanger provided by the present application is shown. Figure 3 The grid structure schematic diagram of the present application is shown. Figure 4 The split grid structure of the present application is shown. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be further described below with reference to the drawings in the embodiments of the present application.

[0020] Figures 1-4 The mixed heat exchanger structure schematic diagram of the present application is shown. As shown in Figure 1 A mixed heat exchanger, in which hot fluid and cold fluid are directly mixed and heat exchanged, includes a hot fluid inlet pipe 1, a cold fluid inlet pipe 2 and a heat exchange fluid outlet pipe 3, as shown in Figure 1 The cold fluid inlet pipe 2 is vertically arranged with the hot fluid inlet pipe 1 and the heat exchange fluid outlet pipe 3, and the cold fluid inlet pipe 2 is arranged between the hot fluid inlet pipe 1 and the heat exchange fluid outlet pipe 3. The hot fluid inlet pipe 1 is provided with a flow regulating device 4, as shown in Figure 2 The flow regulating device is a grid structure, and the grid structure is provided with a plurality of grid pieces, which are arranged vertically to the central axis direction of the cold fluid inlet pipe.

[0021] The hot fluid inlet pipe 1 is located upstream, the heat exchange fluid outlet pipe 3 is located downstream, the cold fluid inlet pipe 2 is arranged 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 provided with an inlet flow regulating device 4 and an outlet flow regulating device 5, the cold fluid inlet pipe 2 is provided with a cold fluid flow regulating device 6, and the cold fluid inlet pipe 2 is arranged on the pipe between the inlet flow regulating device 4 and the outlet flow regulating device 5, and the inlet flow regulating device 4 and the outlet flow regulating device 5 are multi-grid structures.

[0022] On the basis of the existing heat exchanger, an inlet flow regulating system with flow regulating, rectifying and equalizing functions is creatively proposed, which includes two split regulating devices upstream and downstream to realize double control and double equalization, solves the problem from the source of uneven inlet fluid flow rate, has obvious equalization effect, can improve the accuracy and stability of inlet flow and temperature measurement, and further improves the economy and stability of the heat exchange system. Moreover, the device has simple structure, avoids the problems of excessive pressure drop and increased operation cost caused by additional installation of equalization devices in the existing equalization technology, and has high economic benefits.

[0023] The adjacent grid pieces of the flow regulating device 4 have different inclination angles, and the angle between the grid piece and the center axis direction of the cold fluid inlet pipe and the cold fluid flow direction becomes larger and larger as the distance from the cold fluid inlet pipe becomes farther.

[0024] The cold fluid flow is the largest near the cold fluid inlet, the heat exchange temperature difference is the largest at this time, and the heat exchange is the best, which will lead to uneven heat exchange as a whole, and the heat exchange at the cold fluid outlet is the best, and the heat exchange becomes worse as the distance from the outlet becomes farther, which leads to poor overall heat exchange effect, forming a similar counterflow heat exchanger. As the distance from the cold fluid inlet becomes farther, the cold fluid flow becomes smaller and smaller. The present application improves the grid angle to make the hot fluid flow larger and larger along the direction of the cold fluid entering the fluid channel, the heat exchange of the whole heat exchange area is balanced, and the technical effect of a similar counterflow heat exchanger is formed, and the overall heat exchange efficiency is improved.

[0025] Preferably, the angle between the grid piece and the center axis direction of the cold fluid inlet pipe and the cold fluid flow direction becomes larger and larger as the distance from the cold fluid inlet pipe becomes farther. By changing the angle, the heat exchange effect can be better improved, and the overall heat exchange uniformity can be better realized.

[0026] Preferably, the heat exchange fluid outlet pipe is provided with an outlet flow regulating device 5, which is a grid structure provided with a plurality of grid pieces arranged parallel to the central axis of the cold fluid inlet pipe. When the flow regulating device is partially opened, each pair of opposite grid pieces can guide the flow to both sides. The flow regulating device 4 can diffuse the flow in the horizontal direction, and the flow regulating device 5 can diffuse the flow in the vertical direction. When the two sets of flow regulating devices are combined, the flow can be diffused in four directions, i.e. horizontally and vertically, and the uniformity is higher.

[0027] As a preferred embodiment, the main pipe is provided for conveying the hot fluid, and a plurality of hot fluid inlet pipes 1 are connected to the main pipe in parallel. Along the flow direction of the hot fluid in the main pipe, the angle between the flow regulating device 4 in the hot fluid inlet pipe 1 and the grid in the flow regulating device 5 becomes larger and larger. Because the flow resistance becomes smaller as the angle between the grid becomes larger, the flow into the hot fluid inlet pipe 1 can be kept uniform along the flow direction of the hot fluid in the main pipe, and the flow in the upstream hot fluid inlet pipe 1 can be prevented from being too large and the flow in the downstream hot fluid inlet pipe 1 from being too small.

[0028] As a preferred embodiment, the angle between the flow regulating device 4 in the hot fluid inlet pipe and the grid in the flow regulating device 5 becomes larger and larger along the flow direction of the hot fluid in the main pipe. By changing the angle, the uniformity of the flow can be further ensured.

[0029] As a preferred embodiment, a plurality of hot fluid inlet pipes 1 are connected to the main pipe in parallel. Along the flow direction of the hot fluid in the main pipe, the distribution density of the grid in the flow regulating device 5 in the hot fluid inlet pipe becomes smaller and smaller. Because the flow resistance becomes smaller as the distribution density of the grid becomes smaller, the flow into the hot fluid inlet pipe 1 can be kept uniform along the flow direction of the hot fluid in the main pipe, and the flow in the upstream hot fluid inlet pipe 1 can be prevented from being too large and the flow in the downstream hot fluid inlet pipe 1 from being too small.

[0030] As a preferred embodiment, the angle between the flow regulating device 4 in the hot fluid inlet pipe and the grid in the flow regulating device 5 becomes smaller and smaller along the flow direction of the hot fluid in the main pipe. By changing the angle, the uniformity of the flow can be further ensured.

[0031] The hot fluid pipe is provided with a temperature sensor, and a thermometer is arranged downstream of the flow regulating device 5 of the hot fluid inlet pipe 1 to detect the temperature of the hot fluid and the mixed fluid after heat exchange, respectively.

[0032] As preferred, a hot fluid flow meter is arranged 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 arranged on the cold fluid pipe to measure the flow of cold fluid.

[0033] As preferred, when the measured hot fluid flow is lower than a preset value, the controller controls the hot fluid flow regulating device 4 to increase the opening degree, thereby increasing the amount of entering hot fluid. When the detected hot fluid flow is higher than a preset value, the controller controls the hot fluid flow regulating device 4 to decrease the opening degree, thereby decreasing the amount of entering hot fluid.

[0034] As preferred, when the measured hot fluid temperature decreases, the controller controls the hot fluid flow regulating device 4 to increase the opening degree, thereby increasing the amount of entering hot fluid to meet the heat exchange requirement. When the detected hot fluid temperature increases, the controller controls the hot fluid flow regulating device 4 to decrease the opening degree, thereby decreasing the amount of entering hot fluid. Through the above regulation, the energy saving requirement can be achieved, the heat waste can be avoided, and the heat exchange requirement can be met in time.

[0035] As preferred, when the detected temperature of the fluid after heat exchange is lower than a preset value, the controller controls the cold fluid flow regulating device 5 to increase the opening degree, and the controller controls the hot fluid flow regulating device 4 to decrease the opening degree, thereby increasing the amount of entering hot fluid and decreasing the amount of entering cold fluid. When the detected temperature of the fluid after heat exchange is higher than a preset value, the controller controls the cold fluid flow regulating device 5 to decrease the opening degree, and the controller controls the hot fluid flow regulating device 4 to increase the opening degree, thereby decreasing the amount of entering hot fluid and increasing the amount of entering cold fluid. Through the above regulation, the energy saving requirement can be achieved, the heat waste can be avoided, and the heat exchange requirement can be met in time.

[0036] As preferred, when the detected temperature of the fluid after heat exchange is higher than a preset value, the controller controls the cold fluid flow regulating device 5 to increase the opening degree, thereby increasing the amount of entering cold fluid to meet the heat exchange requirement. When the detected temperature of the fluid after heat exchange is lower than a preset value, the controller controls the cold fluid flow regulating device 5 to decrease the opening degree, thereby decreasing the amount of entering cold fluid to meet the heat exchange requirement. Through the above regulation, the energy saving requirement can be achieved, the heat waste can be avoided, and the heat exchange requirement can be met in time.

[0037] The flow regulating device of the grid split structure adjusts the fluid flow by adjusting the angle change between the grid and the center axis of the cold fluid inlet pipe.

[0038] Preferably, a mixing device 7 is arranged downstream of the outlet flow regulating device, and the mixing device is a grid structure, which includes a plurality of grids, and adjacent grids are split regulating structures.

[0039] Preferably, multiple mixing devices are provided, and the mixing mechanism grid comprises parallel structures arranged in parallel with the central axis direction of the cold fluid inlet pipe and vertical structures arranged perpendicular to the central axis direction of the cold fluid inlet pipe, and the parallel structures and the vertical structures are arranged alternately. After the combination of the mixing devices, since the two groups of fluid gates are perpendicular to each other, the flow can be diffused in four directions of horizontal and vertical, and the uniformization degree is higher.

[0040] When the adjacent grid pieces are not arranged in a split-open manner, the included angle between the grid and the central axis of the cold fluid inlet pipe is selected to be the included angle between the cold fluid flow direction and the downstream extension of the grid piece, for example Figure 3 .

[0041] As a preference, the adjacent grids are split-open adjustment structures. Without special instructions, the following description is for the grids with the adjacent grids being split-open structures.

[0042] Fluid flow needs to be controlled, and the split-open adjustment fluid gate of the present application has both flow uniformization effect and flow adjustment effect. In the past, ordinary fluid gates (fluid gates facing one direction) are generally used to control flow, and orifice plates are used for flow uniformization. However, the ordinary fluid gate will guide the hot fluid from one side to the other side, which will increase the degree of flow turbulence in the pipeline. And the orifice plate will significantly reduce the flow area, resulting in a large resistance.

[0043] The split-open fluid gate has little effect on the flow area as long as it is not close to the closed state. The grid of the split-open fluid gate will make the fluid bypass from both sides of the grid, rather than the one-side guiding flow of the ordinary fluid gate. During this process, a certain resistance is applied to the flow, which reduces the flow rate in the area with high flow rate and induces the fluid to pass through the area with low flow rate. Especially when two groups of split-open fluid gates are perpendicular to each other, the flow uniformization effect is better. At the same time, the grid angle (the included angle between the grid and the central axis of the cold fluid pipe) of the split-open fluid gate can also adjust the flow.

[0044] As a preference, the cold fluid flow adjustment device is a multi-grid structure, and the adjacent grids are split-open adjustment structures. By arranging the split-open adjustment structure, the input cold fluid can be made uniform.

[0045] As a preference, the inlet flow adjustment device 4, the cold fluid flow adjustment device 6, and the outlet flow adjustment device 5 are independently adjusted. When the fluid gate opening degree is different, the flow resistance is different, and the flow uniformization effect is also different. When the equipment can withstand a large flow resistance, a smaller fluid gate opening degree can be used to achieve a better flow uniformization effect.

[0046] As preferred, the multi-leaf opposed opening flow regulating device can be controlled independently in terms of the angle of each grid, preferably by a servo motor to control the opening angle of each grid. When the local flow rate is too large, the nearby grid can be controlled to have a smaller angle, thereby increasing the local resistance and making the gas move to the direction with lower flow rate, further improving the uniformity of the flow field. The opening angle of each grid is controlled by a servo motor.

[0047] As preferred, the width of each grid of the multi-leaf opposed opening flow regulating device can be determined according to the actual fluid distribution in the pipeline. As preferred, the diameter of the pipeline is 9-11 times, preferably 10 times, the distance between the grid pieces. By the above-mentioned size, the flow uniformity effect can be obvious, the accuracy and stability of the inlet flow and temperature measurement can be improved, and the economy and stability of the combustion system can be improved. Moreover, the device has a simple structure, and the problem of excessive pressure drop and increased operation cost caused by the additional installation of the flow uniformity device in the prior art can be avoided, and the device has high economic benefits.

[0048] Further, the flow regulating system has the effects of flow regulation, flow straightening and flow uniformity due to the opposed opening form.

[0049] Further, the flow regulating system can realize double control and double flow uniformity to achieve better flow uniformity effect. The hot fluid from the hot fluid inlet pipeline first passes through the inlet flow regulating device, and the flow straightening effect of the flow regulating device makes the hot fluid velocity distribution more uniform. Then, the cold fluid is introduced, and the mixed velocity and temperature are not uniform due to the different temperature and velocity of the cold fluid. The mixed fluid passes through the second multi-leaf opposed opening flow regulating device, and the velocity and temperature of the mixed fluid are more uniformly distributed after passing through the second flow regulating device.

[0050] Further, the angle of each grid of the multi-leaf opposed opening flow regulating device is independently adjustable, preferably by a servo motor to control the opening angle of each grid. Since the pressure loss caused by the grid at different opening angles is different, the flow straightening and flow uniformity effects are different. Since the hot fluid main pipeline and the hot fluid inlet pipeline form a T-shaped structure, the incoming hot fluid itself has a non-uniform velocity, so the angle of the grid can be finely adjusted according to the velocity distribution of the incoming hot fluid.

[0051] As preferred, a / A=ф*(V-V p ) / V p ; wherein a is the change angle of the grid piece, V is the local velocity near the grid piece, V p is the average velocity of the cross section, and angle A is the current angle of the grid piece. ф is a parameter, and the following data is adopted: 0<A<=30°, 0.55<ф<0.60; 30<A<=60°, 0.45<phi<0.55; 60<A<90°, 0.40<phi<0.45; Wherein Amax is 90°.

[0052] As preferred, phi decreases continuously with the increase of A.

[0053] When the angle of the grid sheet is small (tending to close), the flow resistance is large; on the contrary, when the angle of the grid sheet is large (tending to open), the flow resistance is small; if the flow velocity is large at a certain place, the angle of the grid sheet near the place should be small (tending to close), so as to induce the fluid to flow to the area with large angle of the grid sheet, thereby achieving the flow equalization effect. If all the angles of the grid sheets are the same, the flow equalization effect is poor.

[0054] The above formula and parameters of the present application are the best angle adjustment parameter formula obtained through a large number of experiments and numerical simulation. Through the above angle adjustment, the best flow equalization effect under the minimum resistance can be achieved.

[0055] As preferred, one velocity probe such as a Pitot tube is arranged near each grid sheet to measure the velocity, and the opening angle is the included angle between the grid and the axis of the cold fluid pipeline, as shown in the figure. Figure 4

[0056] When the adjacent grid sheets are arranged in a pair, the included angle (i.e. the angle of the grid) between the grid sheet and the central axis of the cold fluid inlet pipe is selected to be an acute angle, as shown in the figure. Figure 4

[0057] Further, the width of each grid of the multi-leaf split flow regulating device can be determined according to the actual fluid distribution in the pipeline, and the width is preferably equal to the grid sheet spacing, and the grid sheet spacing is equal to the diameter of the pipeline / 10. This is because different grid sizes will result in different pressure losses and different flow regulating and flow equalization effects, and the flow equalization effect can be determined according to the velocity distribution and temperature distribution of the incoming fluid to achieve better flow equalization effect.

[0058] As an improvement, the included angle of the flow regulating device 4 grid becomes larger and larger as the distance from the cold fluid inlet becomes closer. Near the cold fluid inlet, the cold fluid flow is the largest, the heat exchange temperature difference is the largest, and the heat exchange is the best, which will lead to uneven heat exchange as a whole, and the heat exchange at the cold fluid outlet is the best. As the distance from the outlet becomes farther, the heat exchange becomes worse, which leads to poor overall heat exchange effect, forming a similar counterflow heat exchanger. As the distance from the cold fluid inlet becomes farther, the cold fluid flow becomes smaller and smaller. The present application improves the included angle of the grid, so that the hot fluid flow becomes larger and larger along the direction in which the cold fluid enters the fluid channel, the heat exchange of the whole heat exchange area is balanced, forming a similar counterflow heat exchange technical effect, and the overall heat exchange efficiency is improved.

[0059] ​​As a preferred, the closer the distance to the cold fluid inlet, the more the angle of the flow regulating device 4 grid increases in the amplitude. Through the change of the angle amplitude, the heat exchange effect can be better improved, and the overall heat exchange uniformity can be better realized.

[0060] As an improvement, the closer the distance to the cold fluid inlet, the larger the size of the flow regulating device 4 grid. Near the cold fluid inlet, the cold fluid flow is the largest, the heat exchange temperature difference is the largest, and the heat exchange is the best, which will lead to the overall uneven heat exchange, and the heat exchange of the cold fluid outlet is the best, and the farther the distance to the outlet, the worse the heat exchange, which leads to the overall poor heat exchange effect, and forms a similar heat exchange of the parallel flow heat exchanger. The closer the distance to the cold fluid inlet, the smaller the flow of the cold fluid. The size of the grid is improved in the present application, so that the size of the grid changes along the direction of the cold fluid entering the fluid channel, the size of the grid is the largest near the cold fluid inlet, the resistance is the largest, and the flow is reduced, so that the farther the distance to the cold fluid outlet, the larger the flow, so that the heat exchange of the whole heat exchange area is balanced, and the technical effect similar to the counterflow heat exchange is formed, and the overall heat exchange efficiency is improved.

[0061] As a preferred, the closer the distance to the cold fluid inlet, the more the size of the flow regulating device 4 grid increases in the amplitude. Through the change of the size amplitude, the heat exchange effect can be better improved, and the overall heat exchange uniformity can be better realized.

[0062] As an improvement, the closer the distance to the cold fluid inlet, the larger the distribution density of the flow regulating device 4 grid. Near the cold fluid inlet, the cold fluid flow is the largest, the heat exchange temperature difference is the largest, and the heat exchange is the best, which will lead to the overall uneven heat exchange, and the heat exchange of the cold fluid outlet is the best, and the farther the distance to the outlet, the worse the heat exchange, which leads to the overall poor heat exchange effect, and forms a similar heat exchange of the parallel flow heat exchanger. The closer the distance to the cold fluid inlet, the smaller the flow of the cold fluid. The distribution density of the grid is improved in the present application, so that the distribution density of the grid changes along the direction of the cold fluid entering the fluid channel, the distribution density of the grid is the largest near the cold fluid inlet, the resistance is the largest, and the flow is reduced, so that the farther the distance to the cold fluid outlet, the larger the flow, so that the heat exchange of the whole heat exchange area is balanced, and the technical effect similar to the counterflow heat exchange is formed, and the overall heat exchange efficiency is improved.

[0063] As a preferred, the closer the distance to the cold fluid inlet, the more the distribution density of the flow regulating device 4 grid increases in the amplitude. Through the change of the distribution density amplitude, the heat exchange effect can be better improved, and the overall heat exchange uniformity can be better realized.

[0064] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A temperature-adjusting hybrid heat exchanger comprising a hot fluid inlet pipe, a cold fluid inlet pipe and a heat exchange fluid outlet pipe, the cold fluid inlet pipe being arranged perpendicularly to the hot fluid inlet pipe and the heat exchange fluid outlet pipe, the cold fluid inlet pipe being arranged between the hot fluid inlet pipe and the heat exchange fluid outlet pipe, a flow regulating device being arranged 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 regulator to detect the temperature of the hot fluid and the mixed heat exchange fluid, respectively. When the measured hot fluid temperature decreases, the controller controls the opening of the hot fluid flow regulator to increase, thereby increasing the amount of hot fluid entering to meet the heat exchange requirements; when the measured hot fluid temperature increases, the controller controls the opening of the hot fluid flow regulator to decrease, thereby reducing the amount of hot fluid entering.

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 temperature-regulating heat exchanger as described in claim 1, characterized in that, 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.

5. The temperature-regulating heat exchanger as described in claim 4, characterized in that, The adjacent grilles are a split-opening adjustable structure.

6. The temperature-regulating heat exchanger as described in claim 5, characterized in that, The density of the flow regulating device's grid increases as it gets closer to the cold fluid inlet.

7. The heat exchanger as described in claim 7, characterized in that, As the distance to the cold fluid inlet increases, the distribution density of the flow regulating device's grid increases dramatically.

8. The heat exchanger as claimed 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.

9. A direct mixing heat exchanger, comprising a hot fluid inlet pipe, a cold fluid inlet pipe, and a heat exchange fluid outlet pipe, wherein a hot fluid flow rate regulating device is provided in the hot fluid inlet pipe, and an outlet flow rate regulating device is provided in the heat exchange fluid outlet pipe; characterized in that, Multiple hot fluid inlet pipes 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 in the hot fluid inlet pipe and the outlet fluid flow regulating device becomes smaller and smaller.

10. The heat exchanger as claimed in claim 9, characterized in that, Along the flow direction of the hot fluid in the main pipeline, the angle between the hot fluid flow regulating device in the hot fluid inlet pipe and the grid in the hot fluid flow regulating device in the outlet pipe increases continuously.

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