CN221403540U - Four-tube-pass falling film evaporator - Google Patents
Four-tube-pass falling film evaporator Download PDFInfo
- Publication number
- CN221403540U CN221403540U CN202323173262.1U CN202323173262U CN221403540U CN 221403540 U CN221403540 U CN 221403540U CN 202323173262 U CN202323173262 U CN 202323173262U CN 221403540 U CN221403540 U CN 221403540U
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- Prior art keywords
- tube
- water inlet
- film evaporator
- falling film
- partition plate
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- 239000011552 falling film Substances 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- 238000005192 partition Methods 0.000 claims description 34
- 238000007789 sealing Methods 0.000 claims description 5
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- 239000003507 refrigerant Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model discloses a four-tube-process falling film evaporator, which is provided with a water inlet side tube box, a cylinder body and an end tube box; tube plates are arranged at two ends of the inside of the cylinder body, the outer side of the tube plates are divided into four areas of a cavity I, a cavity II, a cavity III and a cavity IV, tube plate holes are formed in the tube plates, and fixing of the heat exchange tubes is achieved through the tube plate holes; the water inlet side pipe box is provided with a water inlet pipe assembly and a water outlet pipe assembly. Through the cooperation of the structures, when the secondary refrigerant flows in the interior, the axial four-tube-pass circulation as shown in fig. 7 can be realized, the heat exchange effect can be effectively improved in a narrow space, the defects in the prior art are overcome, and the four-tube-pass falling film evaporator is an ideal four-tube-pass falling film evaporator.
Description
Technical Field
The utility model belongs to the technical field of water and ground source heat pump units of a central air conditioning system, and particularly relates to a four-tube-pass falling film evaporator.
Background
The refrigerating medium in the shell-and-tube falling film evaporator flows in the tube side, forms a refrigerating medium circulation channel through the tube boxes at two sides and the internal channels of the heat exchange tubes, exchanges heat with the refrigerating medium at the tube side through the heat exchange tube wall and the tube body side, and emits heat to evaporate the refrigerating medium.
In order to ensure that the resistance of the coolant flowing through the tube side channels is not excessive and the heat exchange effect is optimal, the flow rate of the coolant in the heat exchange tubes must be controlled within a reasonable range. For the common working condition, the temperature difference of the secondary refrigerant flowing through the tube pass is generally 2 tube pass design, but for the working condition of small flow and large temperature difference or when the number of heat exchange tubes is increased for improving the evaporation temperature, the design of the 2 tube pass is unreasonable, the flow velocity of the secondary refrigerant in the tubes is obviously smaller, the heat exchange effect between the secondary refrigerant and the refrigerant is obviously reduced, the evaporation temperature is reduced, and the running efficiency of the unit is lower.
Therefore, it is important to increase the number of passes of the tube side, increase the flow velocity of the secondary refrigerant in the heat exchange tube, and ensure the heat exchange effect between the secondary refrigerant and the refrigerant. However, in the prior art, because of the unique characteristic of the lower middle tube distribution of the falling film evaporator, great difficulty is brought to the four tubes Cheng Buguan, so that the design of a set of four-tube-process falling film evaporator is a technical problem to be solved for a person skilled in the art.
Disclosure of utility model
In order to overcome the defects in the prior art, the utility model provides a four-tube falling film evaporator, which can enable a secondary refrigerant to form a plurality of areas in the interior of a water inlet side tube box and an end tube box by improving the structures in the interior of the water inlet side tube box and the end tube box, and realize the flow of the secondary refrigerant in the plurality of areas through a baffle plate or a flow guiding device so as to realize full heat exchange.
In order to achieve the technical purpose, the utility model adopts the following scheme: a four-tube falling film evaporator comprises a water inlet side tube box, a cylinder body and an end tube box;
The water inlet side pipe box is provided with a water inlet pipe assembly and a water outlet pipe assembly, and a vertical central baffle plate and a bottom guide baffle plate are arranged in the water inlet side pipe box; an end horizontal partition plate is arranged on the end pipe box;
At two ends of the cylinder body, the end parts are divided into a chamber I, a chamber II, a chamber III and a chamber IV by virtue of a tube plate, a vertical central baffle, a bottom guide baffle and an end part horizontal baffle; the inside of the cylinder body is provided with a replacement heat pipe.
At least one of a water drain hole and an exhaust hole is arranged on the end pipe box.
The water inlet pipe assembly is welded on the sealing head at the lower right side of the water inlet side pipe box.
The water outlet pipe assembly is welded on the sealing head at the upper right side of the water inlet side pipe box.
The vertical central partition plate, the bottom flow guide partition plate and the end horizontal partition plate are carbon steel plates; the bottom flow guide partition plate is an inclined partition plate, and one end surface of the bottom flow guide partition plate is perpendicular to the tube plate after the middle part of the bottom flow guide partition plate is provided with radian.
And when the pipe plate is provided with a plurality of pipe distribution holes and the pipe hole spacing of four adjacent areas of the cavity I, the cavity II, the cavity III and the cavity IV is processed, the minimum spacing is the sum of the pipe hole diameter and the thickness of the partition plate and is further processed by more than 8 mm.
The four-tube-process falling film evaporator effectively solves the design problem of the falling film evaporator when the temperature difference is small and large or the number of the heat exchange tubes is increased for improving the evaporation temperature, and ensures the heat exchange efficiency of a unit.
The utility model has the beneficial effects that: the utility model is provided with the structure, and is provided with the water inlet side pipe box, the cylinder body and the end pipe box; tube plates are arranged at two ends of the inside of the cylinder body, the outer side of the tube plates are divided into four areas of a cavity I, a cavity II, a cavity III and a cavity IV, tube plate holes are formed in the tube plates, and fixing of the heat exchange tubes is achieved through the tube plate holes; the water inlet side pipe box is provided with a water inlet pipe assembly and a water outlet pipe assembly. Through the cooperation of the structures, when the secondary refrigerant flows in the interior, the axial four-tube-pass circulation as shown in fig. 7 can be realized, the heat exchange effect can be effectively improved in a narrow space, the defects in the prior art are overcome, and the four-tube-pass falling film evaporator is an ideal four-tube-pass falling film evaporator.
Drawings
FIG. 1 is a schematic diagram of a front view structure of the present utility model;
FIG. 2 is a schematic view of a tube sheet structure;
FIG. 3 is a schematic side view of the water inlet side pipe box;
FIG. 4 is a schematic view of a front view structure of a water inlet side pipe box;
FIG. 5 is a schematic side view of an end tube box;
FIG. 6 is a schematic diagram of the front view of the end tube box;
FIG. 7 is a schematic diagram of a four-pass flow principle of the present utility model;
In the figure: 1. barrel 11, chamber I, 12, chamber II, 13, chamber III, 14, chamber IV; 2. the water inlet side pipe box, 21, a water inlet pipe assembly, 22, a water outlet pipe assembly, 23, a bottom flow guide baffle, 24, a vertical center baffle, 25 and a side water mixing area; 3. an end pipe box 31, a water drain hole 32, an air exhaust hole 33, an end horizontal partition plate 34, a bottom water mixing area 35 and an upper water mixing area; 4. and 5, tube plates and tube hole distribution.
Detailed Description
The utility model is further described below with reference to examples, the specific structure and the forming mode of the utility model are shown in the drawings, and a person skilled in the art can perform technical extension on the basis of the following technology, so that the technical perfection or expansion of the technical scheme can be realized, and the protection scope of the utility model is limited only by the claims.
A four-tube falling film evaporator, as shown in figure 1, comprises a water inlet side tube box 2, a cylinder body 1, an end tube box 3 and a tube plate 4; the three are connected together through bolts, gaskets and nuts to form the whole four-tube-side falling film evaporator.
The tube plates 4 are arranged at two ends of the interior of the cylinder body 1, and the end parts are divided into a chamber I, a chamber II, a chamber III and a chamber IV by the tube plates 4, the vertical central baffle 24, the bottom flow guide baffle 23 and the end part horizontal baffle 33; the inside of the cylinder body 1 is provided with replacement heat pipes, the tube plate 4 is provided with a plurality of tube plate holes 5, the fixing of a plurality of heat exchange pipes is realized through the tube plate holes, and the heat exchange pipes penetrate through the cylinder body 1 and each cavity at the end part of the cylinder body to form a pipeline for guiding the secondary refrigerant.
As shown in fig. 3 and 4, the water inlet side pipe box 2 is provided with a water inlet pipe assembly 21 and a water outlet pipe assembly 22, and a vertical center baffle 24 and a bottom guide baffle 23 are arranged inside the water inlet side pipe box 2; the water inlet pipe assembly 21 is welded on a seal head at the lower right side of the water inlet side pipe box 2; the water outlet pipe assembly 22 is welded on the sealing head at the upper right side of the water inlet side pipe box 2.
As shown in fig. 5 and 6, the end pipe box 3 is provided with an end horizontal partition 33. After the water inlet side pipe box 2, the cylinder body 1, the end pipe box 3 and the pipe plate 4 are connected, the water inlet side pipe box 2 and the pipe plate on the cylinder body 1 form a side water mixing area 25; the end tube box 3 forms a bottom mixing zone 34 and an upper mixing zone 35 with the tube sheet on the bowl 1.
The vertical central partition plate 24, the bottom guide partition plate 23 and the end horizontal partition plate 33 are all made of carbon steel plates, the bottom guide partition plate 23 is an inclined partition plate, and one end surface of the bottom guide partition plate 23 is perpendicular to the tube plate 4 after the middle of the inclined partition plate is provided with radian.
After the arrangement of the structure is completed, when the utility model is used, the refrigerating medium enters the water inlet side pipe box 2 from the water inlet pipe assembly 21, enters the cavity I11 under the flow guide of the bottom flow guide baffle plate 23, then enters the cavity II 12 through the bottom water mixing area 34 after being blocked by the inner end part horizontal baffle plate 33 of the end pipe box 3, enters the water inlet side pipe box 2, enters the cavity III 13 through the side water mixing area 25, enters the cavity IV 14 through the upper water mixing area 35 in the end pipe box 3, and finally is discharged from the water outlet pipe assembly 22, and the refrigerating medium enters the heat exchange pipes in the cavity I11, the cavity II 12, the cavity III 13 and the cavity IV 14 and realizes the heat exchange action through the heat exchange pipes.
Further, the end pipe box 3 is provided with a drain hole 31, and the drain hole is arranged at the bottom, so that the impurity in the secondary refrigerant can be discharged.
The end pipe box 3 is provided with the exhaust hole 32, and the exhaust hole 32 is arranged at the top, so that the air in the secondary refrigerant can be exhausted.
Still further, in the utility model, the pipe plate 4 needs to be pre-processed to realize a plurality of pipe distribution holes 41 at the upper part, but before processing, the pipe distribution holes 41 need to be considered to fall into four adjacent areas of the chamber I, the chamber II, the chamber III and the chamber IV, and liquid leakage cannot be caused by crossing the vertical central partition plate 24, the bottom guide partition plate 23 and the end horizontal partition plate 33; therefore, when the pipe holes 41 are machined, it should be noted that the peripheral pipe holes of the vertical center partition plate 24, the bottom flow guide partition plate 23 and the end horizontal partition plate 33 have a minimum distance of 8mm or more from the sum of the pipe hole diameters of the heat exchange pipes and the thickness of the partition plates.
Through the cooperation of the structures, the utility model can realize axial four-tube pass circulation as shown in fig. 7 when the secondary refrigerant flows inside, and the four-tube pass falling film evaporator effectively solves the design problem of the falling film evaporator when the temperature difference is small and large or the number of the heat exchange tubes is increased to improve the evaporation temperature, ensures the heat exchange efficiency of a unit, can effectively improve the heat exchange effect in a narrow space, and is an ideal four-tube pass falling film evaporator.
Claims (6)
1. A four-pass falling film evaporator, characterized by: the device comprises a water inlet side pipe box, a cylinder body and an end pipe box;
The water inlet side pipe box is provided with a water inlet pipe assembly and a water outlet pipe assembly, and a vertical central baffle plate and a bottom guide baffle plate are arranged in the water inlet side pipe box; an end horizontal partition plate is arranged on the end pipe box;
at two ends of the cylinder body, the end part is divided into four chambers by virtue of a tube plate, a vertical central baffle plate, a bottom flow guide baffle plate and an end part horizontal baffle plate; the inside of the cylinder body is provided with a replacement heat pipe.
2. A four-tube falling film evaporator according to claim 1, wherein: at least one of a water drain hole and an exhaust hole is arranged on the end pipe box.
3. A four-tube falling film evaporator according to claim 1, wherein: the water inlet pipe assembly is welded on the sealing head at the lower right side of the water inlet side pipe box.
4. A four-tube falling film evaporator according to claim 1, wherein: the water outlet pipe assembly is welded on the sealing head at the upper right side of the water inlet side pipe box.
5. A four-tube falling film evaporator according to claim 1, wherein: the vertical central partition plate, the bottom flow guide partition plate and the end horizontal partition plate are carbon steel plates; the bottom flow guide partition plate is an inclined partition plate, and one end surface of the bottom flow guide partition plate is perpendicular to the tube plate after the middle part of the bottom flow guide partition plate is provided with radian.
6. A four-tube falling film evaporator according to claim 1, wherein: the tube plate is provided with a plurality of cloth tube holes, and when the tube hole spacing of four adjacent areas is processed, the minimum spacing is the sum of the tube hole diameter and the thickness of the partition plate, and the minimum spacing is processed by more than 8 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323173262.1U CN221403540U (en) | 2023-11-24 | 2023-11-24 | Four-tube-pass falling film evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323173262.1U CN221403540U (en) | 2023-11-24 | 2023-11-24 | Four-tube-pass falling film evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221403540U true CN221403540U (en) | 2024-07-23 |
Family
ID=91922604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323173262.1U Active CN221403540U (en) | 2023-11-24 | 2023-11-24 | Four-tube-pass falling film evaporator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221403540U (en) |
-
2023
- 2023-11-24 CN CN202323173262.1U patent/CN221403540U/en active Active
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