Low-vibration noise heat exchanger

Abstract

The application provides a low-vibration-noise heat exchange device, which comprises a heat exchange body, a heating cavity in the heat exchange body, a water inlet and a steam outlet on the heat exchange body, and a heating element in the heating cavity, wherein at least a part of the heating element is provided with a plurality of heating fins, and each heating fin is arranged at intervals along the circumferential side of the heating element. The low-vibration-noise heat exchange device aims to solve the problem of large operation noise of the heat exchange device in the prior art.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, and more particularly to a low-vibration-noise heat exchanger. Background Technology

[0002] Traditional heat exchangers generate strong vibration and noise during steam production, affecting the quietness of the process system. In some cases, long-term mechanical vibration can induce structural failure, leading to a decrease in system reliability. Summary of the Invention

[0003] This invention provides a low-vibration and low-noise heat exchange device, which aims to solve the problem of high operating noise in traditional heat exchange devices.

[0004] To address the problems existing in the prior art, embodiments of the present invention provide a low-vibration and low-noise heat exchange device, comprising:

[0005] A heat exchanger body, wherein the heat exchanger body has a heating chamber, and the heat exchanger body is provided with a water inlet and a steam outlet communicating with the heating chamber; and,

[0006] A heating element is disposed within the heating cavity. At least a portion of the heating element is provided with a plurality of heating ribs, and each heating rib is spaced apart along the periphery of the heating element.

[0007] According to a low-vibration and noise heat exchange device provided by the present invention, the heating element extends axially along the heat exchange body, and each of the heating ribs extends axially along the heating element; or, each of the heating ribs extends radially along the heating element.

[0008] According to a low-vibration and noise heat exchange device provided by the present invention, the heating element extends radially along the heat exchange body, and each of the heating ribs extends axially along the heating element; or, each of the heating ribs extends radially along the heating element.

[0009] According to the present invention, a low vibration and noise heat exchange device is provided, wherein the heating element includes two first heating sections and a second heating section disposed between the two first heating sections, the first heating sections extending axially along the heat exchange body and the second heating section extending radially along the heat exchange body.

[0010] According to a low vibration and noise heat exchange device provided by the present invention, a plurality of heating ribs are provided on both the first heating section and the second heating section. Each heating rib on the first heating section extends axially along the first heating section, and each heating rib on the second heating section extends radially along the second heating section.

[0011] According to the present invention, a low-vibration and noise heat exchange device is provided, wherein the first heating section includes a linear heating rod and the second heating section includes an arc-shaped heating rod.

[0012] According to the present invention, a low vibration and noise heat exchange device is provided, wherein the heating element comprises a plurality of heating elements, each heating element having a different height, and each heating element is sequentially nested and located in the same plane; or, each heating element is arranged at a radial distance along the heat exchange body.

[0013] According to the present invention, a low vibration and noise heat exchange device further includes a flow divider disposed in the heating chamber. The flow divider includes a plurality of jet holes, each of which is used to spray water / steam to flush away bubbles on the surface of the heating element.

[0014] According to the present invention, a low vibration and noise heat exchange device is provided in which a stirrer is provided on the bottom wall of the heating chamber, and the stirrer includes a mechanical stirring impeller, a magnetic stirring impeller or a high-frequency piezoelectric ceramic impeller.

[0015] According to a low-vibration and noise heat exchange device provided by the present invention, the heating chamber is further provided with a bubble divider, which includes a bubble divider grid plate or an ultrasonic generator located above the heating element.

[0016] The low-vibration and noise heat exchange device provided by the present invention, by setting heating fins on the surface of the heating element and setting each heating fin at intervals along the periphery of the heating element, can increase the surface area of ​​the heating element, reduce the heat flux density, reduce the surface temperature of the heating element while ensuring the heating power, and suppress the generation of bubbles on the surface of the heating element. Furthermore, the setting of heating fins can also prevent the agglomeration and growth of bubbles, further suppressing the dense generation of bubbles, thereby reducing the noise generated by the generation and breakage of bubbles. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the low vibration and noise heat exchange device provided by the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the heating element provided by the present invention;

[0020] Figure 3 This is a schematic diagram of the flow divider provided by the present invention;

[0021] Figure 4 This is a schematic diagram of the bubble-dispersing grid plate provided by the present invention.

[0022] Figure label:

[0023] 10: Heat exchanger body; 11: Heating chamber; 12: Water inlet; 13: Steam outlet; 20: Heating element; 21: First heating section; 22: Second heating section; 23: Heating fins; 30: Flow divider; 31: Flow divider ring; 311: Spray hole; 312: Clearance hole; 32: Main inlet pipe; 33: Branch inlet pipe; 40: Stirrer; 41: High-frequency piezoelectric ceramic fin; 50: Bubble divider; 51: Bubble divider grid. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0026] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0030] The following is combined Figures 1-4 This invention describes a low-vibration, low-noise heat exchange device.

[0031] To address the problems existing in the prior art, this invention provides a low-vibration and low-noise heat exchange device, including a heat exchange body 10 and a heating element 20.

[0032] The heat exchanger body 10 has a heating chamber 11. The heat exchanger body 10 is provided with a water inlet 12 and a steam outlet 13 communicating with the heating chamber 11. The water inlet 12 is used to supply water into the heating chamber 11, and the steam outlet 13 is used to supply steam. A heating element 20 is disposed within the heating chamber 11 and is used to heat cold water, causing it to boil and generate steam. In the technical solution provided by this invention, the heating element 20 is at least partially provided with a plurality of heating ribs 23, and each heating rib 23 is spaced apart along the periphery of the heating element 20. It should be noted that during the operation of the heat exchange device, bubbles will continuously rise and burst, generating noise. This invention addresses this by providing heating fins 23 on the surface of the heating element 20, with each heating fin 23 spaced apart along the periphery of the heating element 20. This increases the surface area of ​​the heating element 20, reduces the heat flux density, and decreases the surface temperature of the heating element 20 while ensuring heating power, thus suppressing the formation of bubbles on the surface of the heating element 20 and reducing the noise generated by bubble bursting. Furthermore, the arrangement of the heating fins 23 also prevents the agglomeration and growth of bubbles, further suppressing the dense formation of bubbles on the surface of the heating element 20, thereby further reducing the noise generated by bubble formation and bursting.

[0033] There are various ways to arrange the heating element 20, and correspondingly, there are also various ways to arrange the heating fins 23. In an optional embodiment, the heating element 20 extends axially along the heat exchange body 10. For example, the heating element 20 is configured as a heating rod extending axially along the heat exchange body 10. In an optional embodiment, the heating fins 23 extend axially along the heating element 20, i.e., the heating fins 23 are elongated. In another optional embodiment, the heating fins 23 extend radially along the heating element 20, i.e., the heating fins 23 are annular. Further, in another optional embodiment, the heating element 20 extends radially along the heat exchange body 10. For example, the heating element 20 is configured as a heating rod extending radially along the heat exchange body 10. In an optional embodiment, the heating fins 23 extend axially along the heating element 20, i.e., the heating fins 23 are elongated. In another optional embodiment, the heating fins 23 extend radially along the heating element 20, i.e., the heating fins 23 are annular. It should be noted that the heating element 20 may have multiple spaced areas where heating ribs 23 are respectively provided. The arrangement of heating ribs 23 in each area may be the same or different. This invention does not limit this.

[0034] Further, please refer to Figure 2In the technical solution provided by this invention, the heating element 20 includes two first heating sections 21 and a second heating section 22 disposed between the two first heating sections 21. The first heating sections 21 extend axially along the heat exchange body 10, and the second heating section 22 extends radially along the heat exchange body 10. By setting the heating element 20 to a composite shape, heating efficiency can be improved on the one hand, and the space occupied by the heating cavity 11 can be reduced, facilitating the arrangement of other structures. Furthermore, both the first heating section 21 and the second heating section 22 are provided with multiple heating ribs 23. Each heating rib 23 on the first heating section 21 extends axially along the first heating section 21, and each heating rib 23 on the second heating section 22 extends radially along the second heating section 22. It should be noted that the heating fins 23 on the first heating section 21 extend axially along the heat exchange body 10, which can prevent dense bubble formation on the first heating section 21. Simultaneously, the size of the bubbles generated between the heating fins 23 can be controlled by adjusting the spacing between them. It is understood that the noise generated by the breakage of small bubbles is less than that of large bubbles; therefore, setting the distance between the heating fins 23 to be smaller can suppress the size of the bubbles, thereby reducing the noise of the heat exchange device. Furthermore, the heating fins 23 on the second heating section 22 also inhibit the growth and volume of bubbles on the second heating section 22. On the other hand, bubbles detached from the first heating section 21 will float and touch the second heating section 22, where they will be cut and broken by the heating fins 23, thus dividing the bubbles into smaller bubbles and further reducing noise. In an optional embodiment, the first heating section 21 includes a linear heating rod, and the second heating section 22 includes an arc-shaped heating rod.

[0035] To improve heating efficiency, multiple heating elements 20 are included. In an optional embodiment, the heating elements 20 have different heights and are sequentially nested within the same plane; in another optional embodiment, the heating elements 20 are arranged at radial intervals along the heat exchange body 10. Those skilled in the art can select a suitable arrangement of the heating elements 20 according to the operating conditions and installation requirements; this invention does not limit this arrangement.

[0036] Further, please refer to Figure 1 and Figure 3 The low vibration and noise heat exchange device also includes a flow divider 30, which is disposed in the heating chamber 11. The flow divider 30 includes a plurality of jet holes 311, each jet hole 311 being used to spray water / steam to flush away the bubbles on the surface of the heating element 20.

[0037] It should be noted that the nozzle 311 sprays water or steam. The sprayed water or steam causes strong convection on the surface of the heating element 20, which can displace the small steam bubbles generated by heat absorption on the surface of the heating element 20, thereby preventing the small steam bubbles from continuing to grow and reducing their size. Compared to the breaking of large steam bubbles, the vibration amplitude and energy generated by the breaking of small steam bubbles are significantly reduced, thus reducing the vibration noise of the heat exchange device caused by bubble breaking. Furthermore, the diverter 30 can be configured as one or more, and can spray water or steam; this invention does not limit this.

[0038] Specifically, please refer to Figure 3 The flow divider 30 includes multiple nested flow divider rings 31. Each flow divider ring 31 has multiple spray holes 311 on one side and a flow divider hole on the other side, which is used to communicate with the water inlet 12 or the steam outlet 13. It should be noted that by setting multiple nested flow divider rings 31, multiple water spray rings / steam spray rings are formed outward along the axis of the heat exchanger body 10, making the water / steam spray more uniform. On the one hand, it is less likely to cause drastic changes in the flow field. On the other hand, regardless of the shape and structure of the heating element 20 or its position, the small bubbles generated on it can be swept away by the strong convection generated by the water / steam spray from the flow divider rings 31. Of course, gaps can also be formed between the flow divider rings 31, which can facilitate the placement of the heating element 20 without causing installation interference.

[0039] Furthermore, the diversion component 30 includes a main inlet pipe 32 and a plurality of branch inlet pipes 33 connected to the main inlet pipe 32. The main inlet pipe 32 is connected to the water inlet 12 or the steam outlet 13. Each branch inlet pipe 33 is used to connect to the diversion holes of one or more diversion rings 31.

[0040] In one embodiment of the present invention, the branch inlet pipes 33 are radially distributed, and each branch inlet pipe 33 has multiple inlet holes, each inlet hole communicating sequentially with the branch holes of each branch ring 31. In an optional embodiment, a sleeve can be provided in either the inlet hole or the branch hole, so that the branch inlet pipe 33 and the branch ring 31 can be both installed and connected while maintaining communication. With this configuration, each branch ring 31 has multiple branch holes, and each branch ring 31 can be supplied with water / steam through multiple branch inlet pipes 33. On the one hand, this ensures sufficient water / steam supply, thereby ensuring the water / steam spray pressure to improve the flushing effect on the steam bubbles. On the other hand, it also makes the structure of the branch component 30 more regular, eliminating the need for many dispersed pipes in the heating chamber 11. The entire branch component 30 forms a regular umbrella-shaped structure, which is convenient for installation and the arrangement of other structures. Further, in an optional embodiment, the inlet pipes 33 are radially distributed in the horizontal direction, and the diversion rings 31 are distributed on the same plane, that is, the entire diversion component 30 is planar, and in an optional embodiment, it is circular. In another optional embodiment, the inlet pipes 33 are radially distributed in the vertical direction, and the diversion rings 31 are distributed on different planes, that is, the entire diversion component 30 is three-dimensional, and in an optional embodiment, it is conical. It should be noted that, in order to ensure the water / steam spraying effect and to allow the water / steam spraying to dislodge the small bubbles on the surface of the heating element 20, the water / steam spraying path can be set towards the heating element 20, and the extension direction of the water / steam spraying path of each spray hole 311 is different. In other embodiments, the water / steam spraying path can also be set to be the same as the extension direction of the heating element 20, and the water spraying path of each spray hole 311 is arranged parallel. Assuming that the heating element 20 extends along the axial direction of the heat exchange body 10, and the water / steam spray path also extends along the axial direction of the heat exchange body 10, the water / steam spray can form a flow field along the axial direction of the heat exchange body 10, which can efficiently flush away small bubbles on the heating element 20 and improve the efficiency of bubble flushing.

[0041] Furthermore, in order to facilitate the installation of the heating element 20, a clearance hole 312 is formed between the flow inlet pipe 33 and the flow ring 31, and the heating element 20 passes through the clearance hole 312.

[0042] Furthermore, a stirrer 40 is also provided on the bottom wall of the heating chamber 11. The stirrer 40 can be a mechanical stirrer, a magnetic stirring impeller, or a high-frequency piezoelectric ceramic impeller 41. The magnetic stirring impeller consists of a magnetic actuator and an impeller. The impeller rotates continuously under the drive of the magnetic field. After the impeller rotates, it generates an upward and centrifugal force on the water, forcing convective heat transfer between the water and the heating element 20. Please refer to [link / reference]. Figure 1The high-frequency piezoelectric ceramic stirrer 41 is an array of strips made from piezoelectric ceramic as the base material. When an external power source is connected, each strip of the high-frequency piezoelectric ceramic stirrer 41 oscillates at high frequency under the piezoelectric effect, driving the water to move rapidly and enhancing the convective heat transfer coefficient between the water and the heating element 20. In summary, the stirrer 40 can reduce the surface temperature of the heating element 20, decreasing bubble formation. It can also further flush away bubbles on the surface of the heating element 20 by driving water movement, and finally, it can drive water flow for heat transfer, resulting in a more uniform water temperature. Therefore, the stirrer 40 can both help reduce the noise of the heat exchange device and improve its heating efficiency.

[0043] Although the aforementioned solutions include structures to flush out or reduce the number of bubbles, in practical applications, bubbles will still continuously rise and break, generating noise. Considering that the noise from small bubbles breaking is lower than that from large bubbles, the technical solution provided by this invention also includes a bubble divider 50 within the heating chamber 11. In optional embodiments, please refer to... Figure 1 and Figure 4 The heating chamber 11 is equipped with a bubble-splitting grid 51. By arranging one or more layers of bubble-splitting grid 51 in the space above the heating element 20, the large bubbles generated by boiling water can be broken into a large number of tiny bubbles through the fine grid structure on the bubble-splitting grid 51 and the buoyancy of the bubbles themselves. In another optional embodiment, one or more rings of ultrasonic generators can be arranged on the inner wall of the heating chamber 11. High-frequency ultrasonic vibration can be used to break the large bubbles generated by boiling water into a large number of tiny bubbles. It should be noted that by setting the bubble splitter 50, large bubbles can be divided into tiny bubbles. The tiny bubbles continue to float to the water surface and break, thereby releasing steam. Compared with the breakage of large bubbles on the water surface, the vibration energy generated after the bubbles are broken is also greatly reduced due to the significant reduction in bubble volume. The breakage frequency will shift to a higher frequency due to the increase in the number of small bubbles. The high-frequency oscillation will attenuate rapidly during propagation. The energy transmitted outward after passing through the water and the wall of the heating chamber 11 will also be greatly reduced, thereby significantly reducing the overall vibration noise of the equipment and achieving the function of vibration reduction and noise reduction.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low-vibration, low-noise heat exchange device, characterized in that, include: A heat exchanger body, wherein the heat exchanger body has a heating chamber, and the heat exchanger body is provided with a water inlet and a steam outlet communicating with the heating chamber; and, A heating element is disposed within the heating cavity, and at least a portion of the heating element is provided with a plurality of heating ribs, each of the heating ribs being spaced apart along the periphery of the heating element; It also includes a flow divider, which is disposed in the heating chamber. The flow divider includes a plurality of jet holes, each of which is used to spray water / steam to flush away the bubbles on the surface of the heating element. The flow divider includes multiple flow divider rings nested together, with multiple jet holes on one side of each flow divider ring and a flow divider hole on the other side. The flow divider also includes a main inlet pipe and a plurality of branch inlet pipes connected to the main inlet pipe. The main inlet pipe is connected to the water inlet or the steam outlet. Each branch inlet pipe is used to connect to one or more of the flow divider holes of the flow divider ring. Each of the branch inlet pipes is radially distributed, and each branch inlet pipe has multiple inlet holes, each inlet hole being sequentially connected to the branch hole of each branch ring; An clearance hole is formed between the flow inlet pipe and the flow distribution ring, and the heating element passes through the clearance hole.

2. The low vibration and noise heat exchange device according to claim 1, characterized in that, The heating element extends axially along the heat exchange body, and each of the heating ribs extends axially along the heating element; or, each of the heating ribs extends radially along the heating element.

3. The low vibration and noise heat exchange device according to claim 1, characterized in that, The heating element extends radially along the heat exchange body, and each of the heating ribs extends axially along the heating element; or, each of the heating ribs extends radially along the heating element.

4. The low vibration and noise heat exchange device according to claim 1, characterized in that, The heating element includes two first heating sections and a second heating section disposed between the two first heating sections. The first heating sections extend axially along the heat exchange body, and the second heating section extends radially along the heat exchange body.

5. The low vibration and noise heat exchange device according to claim 4, characterized in that, Both the first heating section and the second heating section are provided with a plurality of heating ribs. Each heating rib on the first heating section extends along the axial direction of the first heating section, and each heating rib on the second heating section extends along the radial direction of the second heating section.

6. The low vibration and noise heat exchange device according to claim 4, characterized in that, The first heating section includes a linear heating rod, and the second heating section includes an arc-shaped heating rod.

7. The low vibration and noise heat exchange device according to claim 4, characterized in that, The heating element comprises multiple elements, each with a different height, and each element is sequentially nested within the same plane; or, the heating elements are arranged at radial intervals along the heat exchange body.

8. The low vibration and noise heat exchange device according to claim 1, characterized in that, The bottom wall of the heating chamber is also equipped with a stirrer, which includes a mechanical stirring impeller, a magnetic stirring impeller, or a high-frequency piezoelectric ceramic impeller.

9. The low vibration and noise heat exchange device according to claim 1, characterized in that, The heating chamber is also equipped with a bubble divider, which includes a bubble divider grid or an ultrasonic generator located above the heating element.

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