JPS5946490A - Heat transmitting tube for heat exchanger of boiling type - Google Patents

Abstract

PURPOSE:To uniformly display high heat-transmitting performance by boiling over the length of a heat transmitting tube, by providing the primary cavity part, having the primary openings arranged regularly, in the lower layer, on which the upper layer, consisting of the secondary cavity part, having the secondary openings arranged crosswise in the state of a net, is provided. CONSTITUTION:In a heat transmitting tube 1 to which the primary cavity part 9 and the primary opening part 10 are provided, the secondary cavity part 15 which is communicated crosswise with each other is formed by depressing the tops of the fins F by some suitable depressing means. The heat transmitting tube 1 is constituted by uniformly laminating the upper layer on the lower layer over the length of a tube, to form a uniform and three-dimensional structure. The lower layer consists of the primary cavity part 9 having the primary opening part 10 in the axial direction of the tube. The upper layer is the secondary cavity part 15, consisting of cavities arranged in the axial and circumferential directions of the tube, having the secondary opening part 14 arranged in the axial and the circumferential directions in the state of a net. In such a structure, a heat transmitting tube of boiling type 1' has a lot of boil producing points for liquid, and part of air bubbles getting off the points are easy to be held in the layers, in addition, feeding of boiling liquid can effectively be performed, passing through the secondary cavity part in the upper layer, as well as the primary cavity part in the lower layer.

Description

[Detailed Description of the Invention] Does the present invention apply to the outer surface of the tube? - Used in heat exchangers to boil liquids11. High t14: Noh's sB II Den 7
17 Regarding heat exchanger tubes for heat exchangers (hereinafter referred to as "boiling heat exchanger tubes"), especially three-dimensional J tubes consisting of a cavity and an opening.
It is an efficient and economical boiling heat transfer material in which the iA structure is uniformly formed on the surface of four tubes.

・For example, a liquid that comes into contact with this from the surface of the body, such as a structure element s 7, is used to efficiently transfer heat to oxygen, alcohol, water, etc.? /& Responsibility, Inokuru Boru 1.
...In order to increase the heat transfer efficiency of Joshinetsu %t', especially low l
It is necessary to improve the heat transfer characteristics of 'X-'-'-R-11 due to the difference in temperature. From the point of view of the general public, Figure 1 (longitudinal cross-sectional diagram of main parts)
As shown in Figure 3, there are a large number of minute openings (holes) or gaps〉3 that spread out between the outer surface of the skin and the outer surface.
1. Form a cavity (or tunnel) b that connects them to the housing in the circumferential direction of t'T, In the case of ltl, the evaporation of the liquid is promoted by making it easier for some of the generated bubbles to remain in the cavity. Note that C in the figure represents the bubbles that escaped from 41L. Figure 2.3 (4:J, schematic cross-sectional diagram of main parts) shows such a heat exchanger tube.
The following are known. That is, after forming the heat transfer fins 01 and 4-shaped helical fins e on the outer surface of the sound P by using a cutting tool, each fin is cut into the shape 1iI of Fig. 2. ■
It is formed by tilting in the direction of the tube axis to form a tunnel hollow having an opening a, and rl! 3 iZ
I of I B jl,:ldenM('1.'f is fin eI
By compressing the shoulders at the top of each fin e1 into a rectangular shape and providing a lateral protrusion, a tunnel-like cavity with a slit-like opening 5:H is created in the upper part. Then, by partially deforming the protruding parts f and f on the mold, the slit-like openings are made into a wide opening 1 and a narrow opening 11 to 4. , +7. It's not happening.

By the way, IJI, 1.1 boil tji! Ndenda A'i
li'? In this case, the opening 3 is an annular or cicada-shaped cavity in the + and lj directions and is one-dimensional because it has a communicating rib 1. ::When 'j becomes active, the supply of liquid becomes insufficient, so there is a limit to the effect of promoting IJI' and IN heat transfer. Furthermore, in manufacturing such heat exchanger tubes, as mentioned above, the fins e are formed by plowing with a cutting tool (for example, a cutting tool), which reduces productivity, and moreover, the micro-cracks that occur during plowing are There is a risk that 11 will explode due to the following. One-way/Person J l
p; 9den t<ノH79'S,-Imo drunk I Toma no lli
As with the heat exchanger, there is a limit to heat transfer, ≧ Promotion of heat transfer. +
It is necessary to do it within the range where zt≦ does not bend, and it is difficult to perform such an operation 6 times well on the J81E. There is one term, i don't do it.

H, If1 for such a long time in history!・1 game, especially 'I
) 1; & thin l, (goldttj%
By sintering the A stand to form a porous hole WJψ9, a large number of holes 5 are three-dimensionally distributed within the hole WJψ9.
rJ look4. t-1, Me.

There is also a heat exchanger tube called C. This kind of 41′η built i! tB l1l) In the heat transfer '11, a large number of 1°C bubbles are generated (pig), and since the surface holes are vertically and horizontally t,'i-[iff, 1) It ri direction. The liquid is continuously supplied to the pores where boiling is actively occurring through the communication portion from the pores where boiling is inactive. Therefore, although the effect of promoting boiling heat transfer can be expected, it is difficult to ensure a uniform metal particle diameter, and it is
Since it is the inner cone that obtains the inner cone, such an effect is uniformly distributed over the length of the pipe, and even f- is not primary. On the other hand,
Since the manufacturing process includes a sintering operation, there is a problem that the productivity is not very good and the cost is higher than that of the d15 heat exchanger tube shown in FIG. 2.3.

The present invention was made after intensive study to solve all the problems associated with conventional 7JlB I ((lj heat transfer tubes), and has been developed to uniformly develop excellent heat transfer performance over the entire length of the pipe. The first object is to provide an economical boiling heat tube that can be used for boiling.

However, the present invention has achieved this purpose.
The heat transfer award is the first cavity provided on the surface side of the tube,
Further, on the outer surface side of the first cavity part, a second cavity part communicating with each other vertically and horizontally is formed in the form of a city, and a pipe is further formed in the part where the vertical and horizontal cavities intersect in the second twin cavity part described in 111J. has a second opening that communicates the outer surface of the fajJ with the second cavity, and
The gist is that there is approximately one opening communicating with the first cavity 1ii] between the recording intersection parts.

The following is an explanation of the structure and operation and effects of Example 1''A and ``4'', but for the convenience of J!11 solution, J.
The explanation will be given in chronological order. Therefore, the technical scope of the present invention is not to be construed in a negative manner based on the following explanation, and the design deception that does not contradict the spirit of Moe et al. Including 1st.

Figures S4 to S9 are explanations showing the manufacturing procedure;
Figure 12 shows a cutaway view of the main parts of the finished moving part, 1g+. First of all, Figure 4 shows a partial view of the raw pipe 3, which is the product material, and is made of metal materials such as Cu, 8T (including the company), QF', and the outer periphery of the raw Cr2. On the sides, a large number of linear or semicircular protrusions 4 and open grooves 3 extending in the tube axis direction are alternately formed. Akira Kitsuko's ~1z Tenden tube uses such a bare bone, and as explained below, by applying a rotation with a rotation disk, the convex 4 and m1tiR2 are made into 11□ib. minute + I in direction
The convex ridge 441 that was hollowed out by this minute 1 new
] This part is extended in the circumferential direction to close the vertical groove 2 in the same direction, thereby forming a large number of independent protruding fins, and at the same time forming the vertical groove into a tunnel-like cavity as the first cavity and creating a new one. form a tube surface.

To be more specific, Fig. 5 shows an example of the rolling forming situation (a view seen from the left side of Fig. 6), and Fig. 6 shows a cross-sectional view of the C-shaped part. Figure 7 is v of Figure 506
-V line 1 cross-sectional equivalent view. In these wards 1, 3 is new and 5 is inner IN! 1. A mandrel for forming 1 V, 6 is a rolling tool (generally shown in Fig. 5), and 6 is a rolling tool.
The rolling tool 6 is composed of disks of m number whose diameter becomes +1l11 order larger toward the right side in FIG. 6, and each disk is attached to a spindle 7. It is fixed to and rotates in direction B. As a result, the raw pipe 3
moves one step in the inlet direction while rotating, and the protrusions 4 and vertical grooves 2 of the outer IM of the blank tube 3 move in the axial direction by a minute tl#? as shown in FIG. As a result, independent protruding fins F are formed.

By the way, in the first rolling process, the disk is pushed in to a depth shallower than the depth of the vertical groove 2 on the surface of the raw pipe 3, so the convex portion 4 divided in the axial direction due to this pushing extends out in the circumferential direction. It will be done. In other words, the meat is pushed and spread out. Since such processing deformation is performed simultaneously on all the protrusions 4 extending in the circumferential direction, the overhanging portions that match 1:210 are pressed against each other, and when a new pipe surface is formed, four , the original vertical groove 2t1 tunnel-like cavity, ie, the 1st hole 1th hole J:+<t ψ. Its terminology: For each protruding fin +/, ) arranged in the circumferential direction! 11.1 The area near the center between L communicates the first part of the lower layer with the outside of the cavity 111.
The first opening becomes (・λ″S8 Figure 14 ((I.

Finally, in Section 8 1 (example of the outer surface shape of the pipe after rolling/IIJ work is completed), the acceptance section 11 is
On the surface of the tube 1, which is arranged in a large number in the circumferential direction below the surface 8, in the axial direction (extending: r41 empty part Mi)
A large number of independent li-shaped fins F are formed in the circumferential direction, and the fin F phase J1 is connected to the IpJ1 cavity 9 between them, i[
The 111'r1 mouth part 111 that fl has a shape of IJM has one large, one river. In this one peg, 11.11' represents a protruding portion, and 12.12' represents an end surface root overhanging portion.

In this way, the heat exchanger tube 1 which has undergone the processing of the first hollow part 9 and the first open lower part J151 (l) has the tip part of the fin F1 axially and circumferentially pressed by this appropriate pressing (for example, forging) means. If the fins are crushed too much, the fins F will come into contact with each other; It is shown that the distance between the upper parts of the two fins gradually narrows in the axial direction and the circumferential direction. The crushing process is completed when the upper parts of the crushed fins F are in sufficient contact with each other, and the fin shape at this time is as shown in FIG. 11.12. In other words, in Figure 10, there is one fin t.
Squeeze 1. The central part of each side of the upper fin F1 2. b
,C.

d is axial direction (arrow 1-13 direction) and circumferential direction (arrow C
-C direction) adjacent fin upper portions F2 and F4.

F3, F5 i4 Corresponding side center part S, a, d, c
It is in sufficient contact. In this terminology, a second hollow part 15 is formed on the tube surface 8 below the first hollow part 98, which communicates with the saliva one dimension laterally (in the axial direction and the circumferential direction in section 1). The outermost surface of pipe II and the second cavity 1
A second opening 14 communicating with the second opening 15 is formed]
ing. That is, the second cavity part 15 has r in the axial direction and the same direction.
i are regularly arranged in a mesh pattern and are opened to the outside through the second opening 14G. 'f3 in the song between the second opening 14? The superficial blood 8 has a second cavity f'd< t
5 and the 17th word part 9 are connected 11M jfJ 1 opening 1
0 force j is formed.

The boiler of the present invention made in this manner (1) (l: heat/
El 1 / is the first opening 1 in the tube axis direction as described above.
This with 0 1 The lower layer (Ban-kun 189) in which the void part 9 is formed and the axial and fi 1-direction with the opening part 14 are arranged in the axial direction and the circumferential direction in a fla-like pattern. The upper h・ノ(
Ge, 2) y't) is in a state where the body is stacked uniformly + Jii, a so-called uniform three-dimensional structure 1
', is constructed as one body.

In other words, the heat exchanger tube 1' has openings that widen toward the end and a tunnel-like cavity that communicates these openings with not only the upper layer (r; , there are many boiling points of the liquid, 1ljf: some of the bubbles that escape are likely to be retained in the liquid, and the boiling liquid is supplied from the second layer of the upper layer, which is uniformly spread over the entire length of the pipe. This is effectively done through the empty word part and the first empty word part in the lower layer. heat transfer 111' is across the tube long bag body (+fl
(Metei3% Jmata rJii r[l:2iiynF!'
A IVt' iit: It is possible to emit Fil+ force).

Also, the 1 self boiling j1 ken 1 yun 31 chou II is the conventional 44'f
) It is easy to roll and forge 1 (this? 1t et al. 2' Because it is L,
These problems are conveniently decided by 1q<.W. Therefore, if such a heat transfer tube II is used as a boiling type heat transfer device, the heat transfer capacity will be increased to the heat exchanger. Needless to say, the production cost can be greatly reduced by 5000 yen and 100 yen's glue.

In addition, in the above embodiment (the f41 hollow part is long and consists of a large number of empty weight parts communicating in one direction, for example, an annular or hollow hollow part is formed in a large number in the longitudinal direction). The configuration is also simple, and the same effects as in the 73rd embodiment described above can be achieved.In this case, the first openings are regularly arranged in parallel in the circumferential direction.

The boiling heat exchanger tube of the present invention has a phase structure of approximately 1n3 or more.
Or, ・Outside I is arranged regularly 11th + 11th D;
Released by jB::+S 1 'N +bi1
When placed in section 2 lower 1., r,;, II-d, M-IM 11' is placed in the lower tenth layer and lined up with +11i'j I-1 method +S 2 :j:i mouth) 11ri It was opened by , [le 2 empty 111d part is in the form j 戊 sai 1 and lj ru 11;
and 1st grade, 2nd grade, . 17J A uniform three-dimensional ridge consisting of a series 1jθ is formed on the surface of ili.
An economical 7'JB ti,g" that can uniformly improve heat transfer performance.
One thing I can do.

[Brief explanation of drawings]

Figures 1-3 Yes, J old also f〕)'-Rainon'B l11
:・den;! A 'l;
+ side schematic diagram of main parts 1, funeral 21XI and ・3'4: (ibe1
is Nt-t +υ
Figures 44 to 91 show the process of making a medium-sized product according to the present invention. In particular, Fig. 10 shows the finished product's external shape 5 - a partial sketch showing an example, g<tt
The figure shows the X-X line notch b1 in FIG. Figures 1 and αS12 are explanatory diagrams of the tube surface state when the fins are excluded.

Claims (1)

[Claims] (1) 'Is the electric surface fitll i the first sky? Same t115
At the same time, a second cavity is formed on the outer surface side of the same part, which communicates vertically and horizontally, and
Furthermore, a portion where the vertical and horizontal cavities intersect with each other is an I which communicates the outer surface of the back with the second cavity 1513.
A heat exchanger tube for a boiling-type condensing exchanger having a JS2 opening, and a first opening f% communicating with a first ψ cavity between the intersection parts. . (2. In claim 1, the first cavity is composed of a large number of 14 cavities communicating in the long hair direction. Kidney. (3) In claim 1, the IS1 cavity consists of an annular or spiral cavity.
Yiyunxian 5 pipe for type 1 outside exchanger.