Heat exchange system capable of reducing structural vibration noise

Abstract

The present application relates to heat exchange system technical field, provide a kind of heat exchange system of reducing structural vibration noise, including heat exchange component and communication pipeline, heat exchange component includes heat exchange body and heating element, heat exchange body has heating cavity, and heat exchange body is equipped with water inlet and steam outlet with heating cavity communication;Heating element is located in heating cavity;Heating element includes telescopic part, telescopic part can move back and forth along the extension direction of itself, to remove the bubble on the surface of telescopic part;Communication pipeline includes steam pipeline and water inlet pipeline, steam pipeline is communicated with steam outlet, and water inlet pipeline is communicated with water inlet.The present application is by being provided on heating element telescopic part, bubble on the surface of telescopic part can be removed in the process of moving back and forth along the extension direction of itself, prevent bubble from growing, reduce the number of large bubble in heating cavity, to reduce the vibration noise of heat exchange system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchange systems, and particularly relates to a heat exchange system capable of reducing structural vibration noise. BACKGROUND

[0002] The heat exchange system is an industrial equipment for generating steam by heating heat exchange medium by using an electric heating rod. The traditional heat exchange system generates strong vibration noise during operation, which affects the running quietness of the process system, and even induces structural failure due to long-term mechanical vibration, thereby reducing the reliability of the system. SUMMARY

[0003] The present application provides a heat exchange system capable of reducing structural vibration noise, which is used to solve the problem of large operation noise of the heat exchange system in the prior art.

[0004] The present application provides a heat exchange system capable of reducing structural vibration noise, which comprises a heat exchange assembly, a heating element, a heating cavity, a water inlet, a steam outlet, a steam pipeline, a water inlet pipeline, a steam ejector, a water supply ejector, a plurality of telescopic parts, and a telescopic part made of a telescopic heat-sensitive material.

[0005] According to the heat exchange system capable of reducing structural vibration noise provided by the present application, the water inlet pipeline is provided with a steam ejector, the steam pipeline comprises a first outlet and a second outlet, the first outlet is used for communicating with the external environment, and the second outlet communicates with the water inlet pipeline through the steam ejector.

[0006] According to the heat exchange system capable of reducing structural vibration noise provided by the present application, the heat exchange body is provided with a water outlet, the water inlet pipeline is provided with a water supply ejector, and the water outlet communicates with the water inlet pipeline through the water supply ejector.

[0007] According to the heat exchange system capable of reducing structural vibration noise provided by the present application, the telescopic part is made of a telescopic heat-sensitive material; the telescopic heat-sensitive material is elongated when the temperature is higher than a preset temperature; and the telescopic heat-sensitive material is retracted when the temperature is lower than the preset temperature.

[0008] According to the heat exchange system capable of reducing structural vibration noise provided by the present application, the telescopic part is a plurality of telescopic parts, and the plurality of telescopic parts are arranged at intervals along the extension direction of the heating element.

[0009] According to the heat exchange system capable of reducing structural vibration noise provided by the application, the heat exchange assembly further comprises at least one sleeve, the sleeve is sleeved on the heating element, and the sleeve is provided with a through hole.

[0010] According to the heat exchange system capable of reducing structural vibration noise provided by the application, the heat exchange assembly further comprises a flow divider, the flow divider is arranged in the heating cavity and comprises a plurality of jet holes, the flow divider is communicated with the water inlet pipeline, each jet hole is used for jetting water to remove the steam bubbles on the surface of the heating element, and / or the flow divider is communicated with the steam pipeline, and each jet hole is used for jetting steam to remove the steam bubbles on the surface of the heating element.

[0011] According to the heat exchange system capable of reducing structural vibration noise provided by the application, the heat exchange assembly further comprises a bubble separator, the bubble separator is arranged in the heating cavity and located above the heating element.

[0012] And / or the heat exchange assembly further comprises an agitator, the agitator is arranged at the bottom of the heating cavity, and the agitator comprises a mechanical agitator, a magnetic agitator and a high-frequency piezoelectric ceramic paddle.

[0013] According to the heat exchange system capable of reducing structural vibration noise provided by the application, the heat exchange assembly further comprises an ultrasonic generator, and the ultrasonic generator is arranged on the inner wall surface of the heating cavity.

[0014] According to the heat exchange system capable of reducing structural vibration noise provided by the application, the heating element comprises a plurality of arc-shaped heating rods, both ends of each arc-shaped heating rod are arranged on the bottom surface of the heating cavity, the heights of the arc-shaped heating rods are different, and the arc-shaped heating rods are sequentially sleeved; and / or the arc-shaped heating rods are arranged along the radial direction of the heating cavity.

[0015] The heat exchange system capable of reducing structural vibration noise provided by the application can remove the steam bubbles on the surface of the telescopic part during the movement of the telescopic part along the extension direction of the telescopic part, prevent the steam bubbles from growing, reduce the number of large steam bubbles in the heating cavity, and thus reduce the vibration noise of the heat exchange system. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0017] Figure 1is one of structural schematic diagrams of the heat exchange system capable of reducing structural vibration noise provided by the present application;

[0018] Figure 2 is one of structural schematic diagrams of the heat exchange system capable of reducing structural vibration noise provided by the present application;

[0019] Figure 3 is one of structural schematic diagrams of the heat exchange system capable of reducing structural vibration noise provided by the present application;

[0020] Figure 4 is one of structural schematic diagrams of the heat exchange system capable of reducing structural vibration noise provided by the present application;

[0021] Figure 5 is one of structural schematic diagrams of the heat exchange system capable of reducing structural vibration noise provided by the present application;

[0022] Figure 6 is one of structural schematic diagrams of the heat exchange system capable of reducing structural vibration noise provided by the present application;

[0023] Figure 7 is one of structural schematic diagrams of the heat exchange system capable of reducing structural vibration noise provided by the present application;

[0024] Reference signs:

[0025] 1, heat exchange body; 11, heating cavity; 12, water inlet; 13, steam outlet; 14, water outlet; 2, heating member; 21, telescopic part; 3, sleeve; 31, through hole; 4, bubble separator; 5, stirrer; 51, magnetic stirrer; 52, high-frequency piezoelectric ceramic paddle; 6, ultrasonic generator; 7, flow divider; 71, flow dividing ring; 711, jet hole; 712, avoiding hole; 72, main inflow pipe; 73, sub inflow pipe; 81, steam pipeline; 811, first outlet; 812, second outlet; 813, control valve; 814, check valve; 815, booster pump; 82, water inlet pipeline; 821, steam ejector; 822, water supply ejector; 823, water supply pump. DETAILED DESCRIPTION

[0026] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0027] In the description of the embodiments of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "connected", "connected to", "connection" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0028] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0029] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0030] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation on the present application.

[0031] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numerals and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and in itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the applicability of other processes and / or the use of other materials.

[0032] The following will be described in detail Figures 1-7 A heat exchange system capable of reducing structural vibration noise is described.

[0033] The heat exchange system provided by the embodiment of the present application can reduce structural vibration noise, and comprises a heat exchange assembly and a communication pipeline.

[0034] Further, the heating element 2 comprises an expansion part 21, which can move back and forth along the extension direction of the expansion part 21 to remove the bubbles on the surface of the expansion part 21. In one embodiment, the expansion part 21 can be an elastic element, which can perform expansion and contraction along the extension direction of the expansion part 21 under the action of an external force. In another embodiment, the expansion part 21 can perform expansion and contraction along the extension direction of the expansion part 21 based on the change of temperature. During the cyclic expansion and contraction of the expansion part, the bubbles on the surface of the expansion part 21 can be scraped off, so that the bubbles are separated from the expansion part 21, and at this time, the bubbles are just generated and have a small size. With the expansion and contraction of the expansion part 21, the small bubbles are continuously scraped off, and the growth of the bubbles is prevented. Compared with large bubbles, the vibration energy and amplitude generated by the breaking of small bubbles are low, so that the vibration noise caused by the breaking of bubbles of the heat exchange system is reduced, and the stability of the structure is improved.

[0035] The heat exchange system provided by the embodiment of the present application can reduce structural vibration noise, and comprises a heat exchange assembly and a communication pipeline.

[0036] In the conventional technology, the heat exchange assembly also has the problems of local supercooling and uneven heating temperature, which will affect the heating efficiency and additionally cause noise. Based on this, in one embodiment provided by the present application, as shown in Figure 1 Fig. 2, the water inlet pipeline 82 is provided with a steam ejector 821, and the steam pipeline 81 comprises a first outlet 811 and a second outlet 812. The first outlet 811 is used to communicate with the external environment, and the second outlet 812 communicates with the water inlet pipeline 82 through the steam ejector 821.

[0037] Specifically, the steam ejector 821 comprises a jet pipe and a flow pipe, the jet pipe is a high-temperature and high-pressure steam passage, and the flow pipe is a feed water passage; the second outlet 812 is in communication with the jet pipe, the flow pipe is in communication with a water source, the high-temperature steam is mixed with the feed water in the steam ejector 821 to be heated, and then the heated feed water is pumped into the heating cavity 11 through the feed water pump 823 on the feed water pipeline 82 and the water inlet 12. In this way, the feed water is injected by steam jet, the steam and the feed water are strongly sheared and mixed in the steam ejector 821, the feed water can be heated, the temperature of the feed water is increased, the uniformity of the water temperature is improved, local overcooling is avoided, and noise is reduced.

[0038] In another embodiment provided by the application, as shown in Figure 2 The heat exchange body 1 is provided with a water outlet 14, the feed water pipeline 82 is provided with a feed water ejector 822, and the water outlet 14 is in communication with the feed water pipeline 82 through the feed water ejector 822.

[0039] Specifically, the feed water ejector 822 comprises a jet pipe and a flow pipe, the jet pipe is a feed water passage, and the flow pipe is a water passage; the water outlet 14 is in communication with the flow pipe, the jet pipe is in communication with a water source, and the jet pipe and the water source are further provided with a feed water pump 823. In this way, the water is injected by feed water jet, the feed water and the water are strongly sheared and mixed in the feed water ejector 822, the feed water can be heated, the temperature of the feed water is increased, the uniformity of the water temperature is improved, local overcooling is avoided, and noise is reduced.

[0040] The steam pipeline 81 of the embodiment of the application is further provided with a control valve 813, and the control valve 813 is used for controlling the on-off of the steam pipeline 81. As shown in Figure 1 The control valve 813 can control the communication and disconnection of the steam pipeline 81 and the steam ejector 821.

[0041] In a preferred embodiment, the telescopic part 21 is made of telescopic heat-sensitive material; in the case that the temperature is higher than a preset temperature, the telescopic heat-sensitive material is elongated by heat; and in the case that the temperature is lower than the preset temperature, the telescopic heat-sensitive material is retracted.

[0042] As shown in Figure 4As shown, the heating element 2 is provided with a telescopic heat-sensitive material piece. When no bubbles are generated on the surface of the heating element 2, the natural convection of the surface of the heating element 2 is low, and the heat exchange coefficient is poor. The temperature of the surface of the heating element 2 is high, and the telescopic heat-sensitive material piece is elongated under the action of high temperature. After water heat absorption starts to generate bubbles, the boiling phase change will absorb a large amount of heat, and the generation of bubbles will also increase the disturbance on the surface of the heating element 2, improve the natural convection heat exchange coefficient, and the temperature of the surface of the heating element 2 decreases, and the telescopic heat-sensitive material piece retracts to a certain extent with the decrease of the temperature. The bubbles on the surface of the heating element 2 are scraped off, and the bubbles are separated from the heating element 2 (the telescopic heat-sensitive material piece), and at this time, the size of the bubbles is small. After the bubbles fall off, the natural convection heat exchange coefficient of the surface of the heating element 2 is also reduced, the temperature of the surface of the heating element 2 rises, and the telescopic heat-sensitive material piece is elongated again with the increase of the temperature. At this time, the bubbles continue to generate, the temperature of the surface of the heating element 2 decreases, the telescopic heat-sensitive material piece retracts, and the bubbles are scraped off. In this way, the telescopic heat-sensitive material piece is in the telescopic motion all the time, and the small bubbles on the surface of the telescopic heat-sensitive material piece are scraped off, preventing the bubbles from growing into large bubbles. Compared with large bubbles, the vibration energy and amplitude generated by the breaking of small bubbles are low, thereby reducing the bubble breaking vibration noise of the heat exchange system and improving the stability of the structure.

[0043] In the case that the telescopic part 21 is a telescopic heat-sensitive material piece, the telescopic part 21 is located at the bottom of the heating element, as shown in the figure, that is, close to the water inlet 12. The temperature change here is obvious, which helps the telescopic heat-sensitive material piece to generate the telescopic motion in a cycle. Figures 1 to 3

[0044] Further, the telescopic part 21 is a plurality of telescopic parts 21, and the plurality of telescopic parts 21 are arranged at intervals along the extension direction of the heating element 2. It should be noted that the plurality of telescopic parts 21 are located at different positions in the heating cavity 11 and can generate the telescopic motion at the same time. The plurality of telescopic parts 21 can also generate the telescopic motion in sequence, such as generating the telescopic motion from the bottom to the top, thereby preventing the bubbles on the surface of the heating element 2 from growing.

[0045] The heat exchange assembly provided by the embodiment of the present application further comprises at least one sleeve 3, the sleeve 3 is sleeved on the heating element 2, and the sleeve 3 is provided with a through hole 31. It should be noted that there is a gap between the inner wall surface of the sleeve 3 and the outer wall surface of the heating element 2, that is, there is a containing cavity for containing the bubbles generated on the surface of the heating element 2. The sleeve 3 is provided with a through hole 31, that is, the through hole 31 can be arranged at the top, the bottom and the outer wall surface of the containing cavity.

[0046] ​It should be noted that the surface temperature of the heating element 2 is high, and the heat absorption rate of the bubbles generated by boiling on the surface of the heating element 2 is large, so that the bubbles grow and converge quickly to form large bubbles, and the large bubbles are discharged outward through the through hole 31 on the sleeve 3. In this process, the large bubbles (bubbles with a size larger than the size of the through hole 31) are broken to form small bubbles with a size comparable to the size of the through hole 31, thereby greatly reducing the number of large bubbles in the heating cavity 11. It can be understood that, compared with large bubbles, the vibration energy and amplitude generated by the breaking of small bubbles are low, thereby reducing the bubble breaking vibration noise of the heat exchange system and improving the stability of the structure.

[0047] As shown in Figures 1 to 3 , the sleeve 3 is located above the telescopic part 21. In the case of multiple telescopic parts 21, one sleeve 3 can be arranged between adjacent two telescopic parts 21, or multiple sleeves 3 can be arranged at intervals.

[0048] In an optional embodiment, the sleeve 3 is multiple, and there is a spacing between adjacent two sleeves 3. In the process of floating up of the bubbles generated between the adjacent two sleeves 3, the large bubbles (with a size larger than the spacing between the inner wall surface of the sleeve 3 and the outer wall surface of the heating element 2) enter the accommodating cavity formed by the sleeve 3 and the heating element 2, and can be broken for the first time in the process of entering; the broken bubbles are discharged outward through the through hole 31 on the sleeve 3, and in this process, the bubbles are broken by the through hole 31 to form small bubbles with a size comparable to the size of the through hole 31. Compared with directly breaking large bubbles, in the embodiment of the present application, the bubbles generated between the adjacent two sleeves 3 are broken twice to form small bubbles, and the vibration energy and amplitude generated by the breaking are low, thereby reducing the vibration noise of the heat exchange assembly.

[0049] In an embodiment, the through hole 31 on the sleeve 3 is multiple, and the multiple through holes 31 are arranged at intervals along the circumference of the sleeve 3. In the process of floating up of the bubbles, any through hole 31 can be broken and discharged; multiple large bubbles can also be broken at the same time, thereby improving the breaking efficiency and accelerating the reduction of the number of large bubbles in the heating cavity 11.

[0050] In another embodiment, the through hole 31 on the sleeve 3 is multiple, and the multiple through holes 31 are arranged at intervals along the radial direction of the sleeve 3. Since the movement of the bubbles is irregular, the embodiment of the present application arranges multiple through holes 31 on the same plane of the sleeve 3, so that multiple large bubbles in the heating cavity 11 can be broken at the same time.

[0051] In an optional embodiment, as shown in Figure 6 , the multiple through holes 31 are arranged at intervals along the radial direction of the sleeve 3 to form a through hole group. The sleeve 3 is provided with multiple through hole groups, and the multiple through hole groups are arranged at intervals along the axial direction of the sleeve 3. In the process of floating up of the large bubbles in the accommodating cavity, any through hole 31 can be broken and discharged.

[0052] In yet another embodiment, the through hole 31 on the sleeve 3 is multiple, and the multiple through holes 31 are distributed along the axis of the sleeve 3 in a spiral manner, and adjacent two through holes 31 are staggered.

[0053] In the embodiment of the present application, the through hole 31 on the sleeve 3 can be of the same size or different sizes.

[0054] In the embodiment of the present application, the expansion part 21 is arranged on the heating element 2, and in the process of expansion and contraction, the expansion part 21 can effectively prevent the large bubbles on the surface of the expansion part 21 from growing, thereby reducing the number of large bubbles in the heating cavity 11. At least one sleeve 3 is arranged on the heating element 2, and the large bubbles generated on the surface of the heating element 2 are broken into small bubbles through the through hole 31 on the sleeve 3, thereby reducing the number of large bubbles in the heating cavity 11. In the embodiment of the present application, the combination of preventing the small bubbles from growing and breaking the large bubbles is adopted to reduce the number of large bubbles in the heating cavity 11, thereby reducing the vibration noise of the heat exchange system.

[0055] The heat exchange assembly provided by the embodiment of the present application further comprises a flow distribution element 7, the flow distribution element 7 is arranged in the heating cavity 11, the flow distribution element 7 comprises multiple jet flow holes 711; the flow distribution element 7 is in communication with the water inlet pipeline 82, and each jet flow hole 711 is used for spraying water to remove the bubbles on the surface of the heating element 2; and / or the flow distribution element 7 is in communication with the steam pipeline 81, and each jet flow hole 711 is used for spraying steam to remove the bubbles on the surface of the heating element 2.

[0056] It should be noted that the jet flow hole 711 can spray water or steam, and the sprayed water or steam can cause strong convection movement on the surface of the heating element 2, and can remove the small bubbles generated by heat absorption on the surface of the heating element 2, thereby preventing the small bubbles from continuing to grow, and playing a role in reducing the size of the bubbles. Compared with the breaking of large bubbles, the breaking of small bubbles can greatly reduce the vibration amplitude and energy, thereby reducing the vibration noise of the heat exchange system caused by the breaking of bubbles. Further, the flow distribution element 7 can be one or multiple, and can spray water or steam, which is not limited by the present application.

[0057] It should be noted that if the flow distribution element 7 is in communication with the water inlet pipeline 82, the flow distribution element 7 can be in communication with the water inlet pipeline 82 through the water inlet 12, or can be directly in communication with the water inlet pipeline 82 through other pipelines. If the flow distribution element 7 is in communication with the steam pipeline 81, the steam pipeline 81 can further comprise a third outlet, and the third outlet is in communication with the flow distribution element 7 to provide steam to the flow distribution element 7.

[0058] It should be noted that in the above embodiment, the outlet end of the water feed ejector 822 is in communication with the water inlet 12. If the flow distribution member 7 is in communication with the water inlet pipe 82, the flow distribution member 7 can be in communication with the water feed ejector 822 through the water inlet 12 or through other pipes directly. If the flow distribution member 7 is in communication with the steam pipe 81, the steam pipe 81 includes a first outlet 811 and a second outlet 812. The first outlet 811 is in communication with the external environment, and the second outlet 812 is in communication with the flow distribution member 7 to provide steam to the flow distribution member 7.

[0059] In one embodiment provided by the present application, as shown in Figure 3 The steam pipe 81 includes a first outlet 811 and a second outlet 812. The second outlet 812 is in communication with each jet hole 711. A check valve 814 and a booster pump 815 are further arranged between the second outlet 812 and the jet hole 711. In this way, the pressure of the steam can be increased, and the steam ejected from the jet hole 711 has a greater pressure, thereby improving the effect of the steam on the bubble.

[0060] As shown in Figure 5 The flow distribution member 7 includes a plurality of flow distribution rings 71 arranged one inside another. Each flow distribution ring 71 is provided with a plurality of jet holes 711 on one side and a plurality of flow distribution holes on the other side. The flow distribution holes are in communication with the water inlet 12 or the steam outlet 13. It should be noted that the plurality of flow distribution rings 71 arranged one inside another are equivalent to a plurality of water / steam jet rings arranged outward along the axis of the heat exchange body 1. The water / steam jet is more uniform. On the one hand, it is not easy to cause a dramatic change in the flow field. On the other hand, no matter what shape and structure the heating element 2 has and where it is arranged, the small steam bubbles generated thereon can be removed by the strong convection of the water / steam jet of the flow distribution ring 71. Of course, gaps can be formed between the flow distribution rings 71. The gaps can facilitate the arrangement of the heating element 2, and the two will not interfere with each other during installation.

[0061] Further, the flow distribution member 7 includes a main flow inlet pipe 72 and a plurality of sub-flow inlet pipes 73 in communication with the main flow inlet pipe 72. The main flow inlet pipe 72 is in communication with the water inlet 12 or the steam outlet 13. Each sub-flow inlet pipe 73 is in communication with the flow distribution holes of one or more flow distribution rings 71. In an optional embodiment, when the flow distribution member 7 is used for water jet, the main flow inlet pipe 72 can be directly in communication with the water inlet 12, that is, all the water is jetted out through the flow distribution member 7. In another optional embodiment, a pipe is arranged at the water inlet 12. One pipe is used to normally deliver water into the heating cavity 11, and the other pipe is in communication with the main flow inlet pipe 72 and used to jet water. When the flow distribution member 7 is used for steam jet, the steam pipe 81 can include a plurality of outlets. One of the outlets can be in communication with the main flow inlet pipe 72. Further, each sub-flow inlet pipe 73 can be in communication with the flow distribution holes of one flow distribution ring 71 or a plurality of flow distribution rings 71. The present application does not limit the number of the flow distribution rings 71.

[0062] In an embodiment provided by the application, each sub-inflow pipe 73 is radially distributed, and a plurality of inflow holes are formed in each sub-inflow pipe 73, each of which is in communication with a sub-outflow hole of each sub-flow ring 71. In an alternative embodiment, a sleeve 3 can be arranged in one of the inflow holes or the sub-outflow holes, so that the sub-inflow pipe 73 and the sub-flow ring 71 can be connected and kept in communication. In this way, each sub-flow ring 71 has a plurality of sub-outflow holes, and each sub-flow ring 71 can be supplied with water / steam through a plurality of sub-inflow pipes 73, which can ensure sufficient water / steam supply and thus ensure the water / gas pressure to improve the separation effect of the steam bubbles, and also make the structure of the sub-flow device 7 more regular, without the need to arrange more dispersed pipelines in the heating cavity 11. The entire sub-flow device 7 forms a regular umbrella-shaped structure, which is convenient for installation and arrangement of other structures.

[0063] Further, in an alternative embodiment, each sub-inflow pipe 73 is radially distributed in the horizontal direction, and each sub-flow ring 71 is distributed in the same plane, i.e., the entire sub-flow device 7 is planar, and in an alternative embodiment, it is circular. In another alternative embodiment, the sub-inflow pipes 73 are radially distributed in the vertical direction, and each sub-flow ring 71 is distributed in different planes, i.e., the entire sub-flow device 7 is three-dimensional, and in an alternative embodiment, it is conical.

[0064] It should be noted that, in order to ensure the water / gas spraying effect and make the water / gas spraying capable of separating the small steam bubbles on the surface of the heating element 2, the water / gas spraying path can be arranged to be directed towards the heating element 2, and the extension direction of the water / gas spraying path of each spray hole 711 is different. In other embodiments, the water / gas spraying path can be arranged to be the same as the extension direction of the heating element 2, and each water / gas spraying path is arranged in parallel. Assuming that the heating element 2 extends in the axial direction of the heat exchange body 1, the water / gas spraying path also extends in the axial direction of the heat exchange body 1, and the water / gas spraying can form a flow field in the axial direction of the heat exchange body 1, which can efficiently flush the small steam bubbles on the heating element 2 upwards, thereby improving the efficiency of the steam bubble flushing.

[0065] Further, in order to facilitate the arrangement of the heating element 2, an avoiding hole 712 is formed between the sub-inflow pipe 73 and the sub-flow ring 71, and the heating element 2 extends in the axial direction of the heat exchange body 1 and passes through the avoiding hole 712.

[0066] In another embodiment of the present application, the flow distributor 7 comprises a spiral flow distributor extending along the axial direction of the heat exchange body 1, and a plurality of spray holes 711 are arranged on the spiral flow distributor at intervals. Compared with the flow distributor ring 71, the spiral flow distributor ascends spirally, which can, on the one hand, spray water / gas to flush the bubbles on the surface of the heating element 2, and on the other hand, if the spiral flow distributor sprays water, the water can be heated while ascending spirally, which can further prevent the problem of uneven water temperature in the heat exchange body 1, and the problem of excessive cooling of water leading to a large noise. If the spiral flow distributor sprays gas, the temperature of the water can be further increased, and the heating effect can be improved.

[0067] It should be noted that the flow field formed by the spiral flow distributor is not very uniform, but the effect of flushing the bubbles is more ideal than that of the flow distributor ring 71. The spiral flow distributor can heat the water or prevent the water from being excessively cooled, and can further assist in reducing the noise. The first end of the spiral flow distributor can be in communication with the water inlet 12 or the gas outlet 13. Further, the heating element 2 extends along the axial direction of the heat exchange body 1, and the spiral flow distributor is sleeved outside the heating element 2, and the two are installed without interfering with each other.

[0068] Further, in order to further reduce the noise of bubble breaking, the heat exchange assembly provided by the embodiment of the present application further comprises a bubble separator 4, which is arranged in the heating cavity 11 and located above the heating element 2. In an optional embodiment, the bubble separator 4 comprises a bubble separation plate, and the bubble separation plate is provided with a fine grid structure. Figure 7 As shown in FIG. 6, the large bubbles generated by the water boiling are cut into a large number of small bubbles by the fine grid structure due to the buoyancy of the large bubbles, and the small bubbles continue to float to the water surface and break, thereby releasing the steam.

[0069] The bubble separator 4 in the embodiment of the present application can be multiple, and the multiple bubble separators 4 are arranged at intervals above the heating element 2 along the height direction of the heating cavity 11. In order to reduce the volume of the bubbles and further reduce the noise, the division densities of the multiple bubble separators 4 are different, and the division density (such as the density of the grid) gradually increases from the bottom to the top of the heating cavity 11. The bubbles are cut by multiple times, and the volume of the bubbles gradually decreases, and the breaking noise of the bubbles on the water surface is small.

[0070] In a specific embodiment, a first bubble separator and a second bubble separator are arranged above the heating element 2, the first bubble separator is arranged above the second bubble separator, the density of the fine grid structure on the first bubble separator is greater than the density of the fine grid structure on the second bubble separator, the bubbles are cut by the first bubble separator and then cut by the second bubble separator, and the volume of the bubbles cut by the two times is small.

[0071] The heat exchange assembly provided by the embodiment of the present application further comprises an agitator 5 arranged at the bottom of the heating cavity 11.

[0072] In one embodiment, the stirrer 5 is a mechanical stirrer, which comprises an axial-flow or mixed-flow rotating impeller arranged at the bottom of the heating cavity 11 and a driving shaft connected with the impeller. The impeller is continuously rotated under the action of a prime mover (such as an electric motor), and the impeller generates upward and centrifugal forces on water after rotation, thereby forcing the water to exchange heat with the heating element 2 by convection, and reducing the surface temperature of the heating element 2.

[0073] In another embodiment, as shown in Figure 2 the stirrer 5 is a magnetic stirrer 51, which comprises an axial-flow or mixed-flow rotating impeller arranged at the bottom of the heating cavity 11 and a magnetic driver. The impeller is continuously rotated under the action of a magnetic field force, and the impeller generates upward and centrifugal forces on water after rotation, thereby forcing the water to exchange heat with the heating element 2 by convection, reducing the surface temperature of the heating element 2, and making the temperature of the water more uniform.

[0074] In yet another embodiment, as shown in Figure 3 the stirrer 5 is a high-frequency piezoelectric ceramic paddle 52, which is an array of strips processed based on piezoelectric ceramic as a basic material. Under the condition of connecting an external power supply, each strip of the high-frequency piezoelectric ceramic paddle 52 undergoes high-frequency reciprocating oscillation under the action of piezoelectric effect, drives the water to move rapidly, enhances the convection heat exchange coefficient between the water and the heating element 2, reduces the surface temperature of the heating element 2, and makes the temperature of the water more uniform.

[0075] The embodiment of the present application can reduce the surface temperature of the heating element 2, reduce the generation of steam bubbles, and further flush the steam bubbles on the surface of the heating element 2 by driving the water to move, thereby assisting in reducing the noise in the heat exchange assembly. In addition, the flow of water can also be driven for heat exchange, so that the temperature of the water is more uniform, and the heating efficiency of the heat exchange assembly is improved. The arrangement of the stirrer 5 can not only assist in reducing the noise of the heat exchange assembly, but also improve the heating efficiency of the heat exchange assembly.

[0076] Compared with the breaking of large steam bubbles on the water surface, at least one of the bubble separator 4 and the stirrer 5 is arranged in the embodiment of the present application to break the large steam bubbles into small steam bubbles. Since the volume of the small steam bubbles is greatly reduced, the vibration energy and vibration amplitude generated after the breaking of the small steam bubbles are also greatly reduced, and the breaking frequency moves to high frequency due to the increase in the number of small steam bubbles. The high-frequency oscillation quickly attenuates during propagation, and the energy transmitted outward after passing through the water and the inner wall of the heating cavity 11 is also greatly reduced, thereby greatly reducing the overall vibration noise of the equipment and achieving the function of vibration and noise reduction.

[0077] The heat exchange assembly provided by the embodiment of the present application further comprises an ultrasonic wave generator 6 arranged on the inner wall of the heating cavity 11. As shown in Figures 1 to 3As shown, the ultrasonic generator 6 is arranged above the heating element 2, and the steam bubbles generated by boiling water are broken into a large number of tiny bubbles by high-frequency ultrasonic vibration, and the tiny bubbles continue to float to the water surface and break to release steam. It should be noted that the ultrasonic generator 6 also generates high-frequency vibration, and its energy will also be greatly attenuated in a short distance or on the inner wall of the heating cavity 11, so it will not affect its own vibration level. The number of ultrasonic generators 6 in the embodiment of the present application is not specifically limited, and one or more rings of ultrasonic generators 6 can be arranged along the inner wall of the heating cavity 11.

[0078] The heating element 2 in the embodiment of the present application can be a heating rod, a heating wire or other heating device, and the present application does not limit this.

[0079] In a specific implementation, the heating element 2 includes an arc-shaped heating rod, and the two ends of the arc-shaped heating rod are arranged on the bottom surface of the heating cavity 11. Compared with a long strip-shaped heating rod, the arc-shaped heating rod can increase the contact area with water and improve the heating efficiency. Specifically, the arc-shaped heating rod includes a first vertical section, a second vertical section and an arc-shaped section, the first vertical section and the second vertical section are arranged at the bottom of the heating cavity 11, the two ends of the arc-shaped section are connected with the top of the first vertical section and the second vertical section respectively, and the opening of the arc-shaped section is downward, as shown. Figures 1 to 3

[0080] Further, in an optional embodiment, the heating element 2 includes a plurality of arc-shaped heating rods, the heights of the arc-shaped heating rods are different, and the plurality of arc-shaped heating rods are sequentially arranged, so that water at different heights can be heated at the same time, thereby improving the heating speed. In an optional embodiment, the plurality of arc-shaped heating rods are arranged at intervals along the radial direction of the heating cavity 11. The arrangement form of the arc-shaped heating rods in the embodiment of the present application is not specifically limited and can be arranged according to the actual working condition.

[0081] It should be noted that the positions of the upper telescopic parts 21 of the plurality of arc-shaped heating rods can be the same or different. The positions of the sleeves 3 can be the same or different. In an optional embodiment, the positions of the upper telescopic parts 21 of the two adjacent arc-shaped heating rods are staggered, such as being arranged at different heights of the heating cavity 11.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.​

Claims

1. A heat exchange system capable of reducing structural vibration noise, characterized in that, The application relates to a heat exchange assembly. The heat exchange assembly comprises a heat exchange body and a heating element, the heat exchange body is provided with a heating cavity, and the heat exchange body is provided with a water inlet and a steam outlet which are communicated with the heating cavity. The heating element is arranged in the heating cavity, and the heating element comprises an expansion part which can move back and forth along the extension direction of the expansion part to remove steam bubbles on the surface of the expansion part. The heat exchange assembly further comprises a communication pipeline which comprises a steam pipeline and a water inlet pipeline, the steam pipeline is communicated with the steam outlet, and the water inlet pipeline is communicated with the water inlet. The expansion part is made of an expansion heat-sensitive material, the expansion heat-sensitive material is elongated when the temperature is higher than a preset temperature, and the expansion heat-sensitive material is retracted when the temperature is lower than the preset temperature.

2. The heat exchange system capable of reducing structural vibration noise according to claim 1, characterized in that, The water inlet pipeline is provided with a steam ejector, the steam pipeline comprises a first outlet and a second outlet, the first outlet is used for being communicated with an external environment, and the second outlet is communicated with the water inlet pipeline through the steam ejector.

3. The heat exchange system capable of reducing structural vibration noise according to claim 1, characterized in that, The heat exchange body is provided with a water outlet, the water inlet pipeline is provided with a water supply ejector, and the water outlet is communicated with the water inlet pipeline through the water supply ejector.

4. The heat exchange system capable of reducing structural vibration noise according to claim 1, characterized in that, The expansion part is arranged in a plurality of modes, and the plurality of expansion parts are arranged at intervals along the extension direction of the heating element.

5. The heat exchange system capable of reducing structural vibration noise according to claim 1, characterized in that, The heat exchange assembly further comprises at least one sleeve, the sleeve is sleeved on the heating element, and the sleeve is provided with a through hole.

6. The heat exchange system capable of reducing structural vibration noise according to claim 1, wherein The heat exchange assembly further comprises a flow divider, the flow divider is arranged in the heating cavity, and the flow divider comprises a plurality of jet holes. The flow divider is communicated with the water inlet pipeline, and each jet hole is used for spraying water to remove steam bubbles on the surface of the heating element. The flow divider is communicated with the steam pipeline, and each jet hole is used for spraying steam to remove steam bubbles on the surface of the heating element.

7. The heat exchange system capable of reducing structural vibration noise according to claim 1, wherein The heat exchange assembly further comprises a bubble separator, the bubble separator is arranged in the heating cavity and located above the heating element. The heat exchange assembly further comprises a stirrer, the stirrer is arranged at the bottom of the heating cavity, and the stirrer comprises a mechanical stirrer, a magnetic stirrer and a high-frequency piezoelectric ceramic paddle.

8. The heat exchange system capable of reducing structural vibration noise according to claim 1, wherein The heat exchange assembly further comprises an ultrasonic wave generator, and the ultrasonic wave generator is arranged on the inner wall of the heating cavity.

9. The heat exchange system capable of reducing structural vibration noise according to claim 1, wherein The heating element comprises a plurality of arched heating rods, two ends of each arched heating rod are arranged on the bottom surface of the heating cavity, the heights of the arched heating rods are different, the arched heating rods are arranged in a sleeving mode, and / or the arched heating rods are arranged at intervals along the radial direction of the heating cavity.

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