CN219531267U - Dry evaporator with heat return device and refrigerating system - Google Patents
Dry evaporator with heat return device and refrigerating system Download PDFInfo
- Publication number
- CN219531267U CN219531267U CN202223577792.8U CN202223577792U CN219531267U CN 219531267 U CN219531267 U CN 219531267U CN 202223577792 U CN202223577792 U CN 202223577792U CN 219531267 U CN219531267 U CN 219531267U
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- liquid
- regenerator
- dry evaporator
- heat
- pipe box
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- 239000007788 liquid Substances 0.000 claims abstract description 68
- 239000003507 refrigerant Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000005057 refrigeration Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 abstract description 5
- 238000001704 evaporation Methods 0.000 abstract description 5
- 238000002309 gasification Methods 0.000 abstract description 3
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011552 falling film Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Abstract
The utility model provides a dry evaporator with a heat return device and a refrigerating system, which comprise a cylinder, wherein end plates are arranged at two ends of the cylinder, a heat exchange tube bundle is fixed between the end plates, baffle plates are arranged on the heat exchange tube bundle, a water inlet and a water outlet are arranged on the cylinder, a liquid distribution tube box is arranged at the bottom of the cylinder, a gas collecting tube box is arranged at the top of the cylinder, a heat regenerator is arranged in the gas collecting tube box, and a gas outlet is arranged at the upper part of the gas collecting tube box; the liquid outlet end of the heat regenerator is communicated with the liquid distribution pipe box, liquid refrigerant is introduced into the liquid distribution pipe box, the pressure drop of the gas side of the heat regenerator is low, the heat regenerator is lower than that of the existing external heat regenerator system, the evaporation temperature of the heat regenerator can be increased by 1-2 ℃ and the energy efficiency of the heat regenerator can be improved by about 5% relative to that of a dry evaporator without the heat regenerator, and the liquid refrigerant which is not evaporated can be returned to the evaporator by adopting an injection system, so that the gasification load of the heat regenerator is reduced.
Description
Technical Field
The utility model relates to the field of heat exchangers, in particular to a dry evaporator with a heat regenerator and a refrigeration system.
Background
The refrigeration system comprises a condenser and an evaporator, wherein the evaporator is difficult to design, and not only needs to consider adopting a heat exchange tube form, but also needs to design a flow path of the heat exchanger and adopt proper refrigerant distribution. Common heat exchangers are dry evaporators, plate heat exchangers, flooded evaporators and falling film evaporators.
The dry evaporator adopts a round cylinder body, a replacement heat pipe is arranged in the cylinder body, refrigerant flows and evaporates in the heat exchange pipe, in order to avoid the suction of the compressor and carry liquid, the superheat degree of an outlet of the dry evaporator needs to be ensured, and the deviation of the local heat exchange effect of a heat exchange area in the dry evaporator is caused, so that the evaporation temperature is low, the energy efficiency of a unit is low, and a heat regenerator is also called a gas-liquid heat exchanger. In a freon refrigerating system, refrigerant vapor from an evaporator is utilized to cool high-pressure liquid before entering the evaporator, so that the refrigerant liquid is supercooled and the vapor is overheated, and the problem of poor heat exchange in an overheating area exists in an external regenerator.
Disclosure of Invention
The utility model provides a dry evaporator with a heat recovery device, which aims to solve the technical problems of uneven distribution and poor heat exchange in a superheat area of the dry evaporator;
a liquid outlet pipe is arranged on the side wall of the gas collecting pipe box between the heat regenerator and the end plate, and is communicated with the liquid distribution pipe box, so that liquid refrigerant which is not evaporated is introduced into the liquid distribution pipe box;
the liquid outlet end of the heat regenerator is communicated with the liquid distribution pipe box, and liquid refrigerant is introduced into the liquid distribution pipe box.
Preferably, an ejector is arranged at the inlet of the liquid distribution pipe box, and a drainage port of the ejector is communicated with the liquid outlet pipe.
Preferably, the liquid outlet end of the heat regenerator is communicated with the inlet of the ejector and is connected with an expansion valve.
Preferably, the regenerator comprises a first header and a second header, wherein a liquid inlet end is arranged on the first header, a plurality of fine tube bundles are communicated between the first header and the second header, and the liquid outlet end is connected to the second header.
Preferably, the thin tube bundle is provided with a plurality of fins.
Preferably, the cylinder is square, and the regenerator is square.
Preferably, the water inlet is positioned on the cylinder body close to one side of the gas collecting tube box, and the water outlet is positioned on the cylinder body close to one side of the liquid distribution tube box.
Preferably, the expansion valve is controlled by the superheat degree, the superheat degree is the superheat degree of the air outlet of the dry-type evaporator, and the superheat degree is 5-10 ℃.
Preferably, the superheat degree of the expansion valve is controlled by PI, the P value is 20-60, and the I value is 1000-2000.
A refrigerating system of a dry evaporator comprises a compressor, a condenser and the dry evaporator, wherein an outlet of the condenser is connected with a liquid inlet end of a heat regenerator of the dry evaporator, and an air outlet on a gas collecting tube box is connected with an air suction port of the compressor.
The dry evaporator with the heat return device and the refrigerating system provided by the utility model have the following beneficial effects: the pressure drop of the gas side is low, which is lower than that of the existing external heat regenerator system, and compared with a dry evaporator without a heat regenerator, the evaporation temperature can be increased by 1-2 ℃, and the energy efficiency can be improved by about 5%; compared with a system with an external heat regenerator, the air suction pressure drop is reduced by about 25kPa, and the energy efficiency is improved by 2%. By adopting the injection system, the liquid refrigerant which is not evaporated can be returned to the evaporator, so that the gasification load of the heat regenerator is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below.
FIG. 1 is a front interior schematic view of the present utility model;
FIG. 2 is a schematic side view of the present utility model;
FIG. 3 is a schematic view of a regenerator of the present utility model;
wherein, 1, a cylinder; 2. an end plate; 3. an air outlet; 4. a heat exchange tube bundle; 5. a baffle plate; 6. a water inlet; 7. a water outlet; 8. a liquid distribution pipe box; 9. a gas collecting tube box; 10. a regenerator; 11. a liquid outlet pipe; 12. an ejector; 13. a liquid outlet end; 14. an expansion valve; 15. a liquid inlet end; 16. a first header; 17. a second header; 18. a bundle of thin tubes; 19. and (3) a fin.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
As shown in fig. 1, the utility model provides a dry evaporator with a heat return device, which comprises a cylinder body 1, wherein end plates 2 are arranged at two ends of the cylinder body 1, in the embodiment, the cylinder body 1 is square and comprises four side plates, namely front, back, left and right, the square structure reduces the manufacturing difficulty and reduces the cost, a heat exchange tube bundle 4 is fixed between the end plates 2, the heat exchange tube bundle 4 is communicated with a gas collecting tube box 9 and a liquid distributing tube box 8 at two sides of the end plates 2, baffle plates 5 are arranged on the heat exchange tube bundle 4, a water inlet 6 and a water outlet 7 are arranged on the cylinder body 1, the liquid distributing tube box 8 is arranged at the bottom of the cylinder body 1, the gas collecting tube box 9 is arranged at the top of the cylinder body, a heat regenerator 10 is arranged in the gas collecting tube box 9, and a gas outlet 3 is arranged at the upper part of the gas collecting tube box 9.
The regenerator 10 is square to adapt to the structure of the cylinder 1, a liquid outlet pipe 11 is arranged on the side wall of the gas collecting pipe box 9 between the regenerator 10 and the end plate 2, the liquid outlet pipe 11 is communicated with the liquid distribution pipe box 8, and in the embodiment, in order to increase the power of liquid refrigerant entering the liquid distribution pipe box 8, an ejector 12 is arranged at the inlet of the liquid distribution pipe box 8; the liquid outlet end 13 of the heat regenerator 10 is communicated with the inlet of the ejector 12, and for better control, an expansion valve 114 is arranged between the liquid outlet end 13 of the heat regenerator 10 and the inlet of the ejector, the expansion valve 14 is controlled by adopting the degree of superheat, the degree of superheat is the degree of superheat of the air outlet 3 of the dry evaporator, and the degree of superheat is 5-10 ℃, preferably 6 ℃. The superheat degree of the expansion valve 14 can be controlled by PI, the P value is 20-60, and the I value is 1000-2000. The drainage port of the ejector 12 is communicated with the liquid outlet pipe 11, and the ejector 12 can enable the liquid refrigerant which is not evaporated to return to the evaporator, so that the gasification load of the heat regenerator is reduced.
When the evaporator is used, the water inlet 6 on the cylinder body 1 is positioned at the lower part, the water outlet 7 is positioned at the upper part, the water inlet 6 is filled with water, the water outlet 7 is filled with water, meanwhile, the liquid inlet 15 of the heat regenerator 10 is filled with refrigerant, the thin tube bundle 18 is filled with liquid refrigerant, the thin tube bundle 18 is filled with gas refrigerant generated by heat exchange, the heat exchange between gas and liquid is realized, the refrigerant uniformly enters the heat exchange tube through liquid distribution, flows into the gas collecting tube box 9 after evaporation from bottom to top, the heat regenerator 10 arranged in the gas collecting tube box 9 flows out from the air port after the evaporated air flow passes through the heat regenerator 10, the lower end of the gas collecting tube box 9 is provided with a liquid outlet, the non-evaporated refrigerant flows down to the evaporator inlet along the liquid outlet and the pipeline, and is injected into the liquid distribution tube box 8 of the evaporator by high-speed air flow. Through having set up regenerator 10 inside the evaporimeter, the gaseous direct backheating of refrigerant, the pressure drop of gas side is lower than the pressure drop of external regenerator, can improve the utilization ratio of refrigerant, can directly draw into cloth liquid pipe case 8 with unevaporated refrigerant simultaneously, increase efficiency, the system evaporation temperature can improve 1 ~ 2 ℃, has improved refrigerating output 5% simultaneously, has greatly reduced the manufacturing cost of regenerator simultaneously.
The regenerator 10 comprises a first header 16 and a second header 17, a liquid inlet end 15 is arranged on the first header 16, a plurality of thin tube bundles 18 are communicated between the first header 16 and the second header 17, the liquid outlet end 13 is connected to the second header 17, a plurality of fins 19 are arranged on the thin tube bundles 18, the thin tube bundles 18 are made of stainless steel, the diameter is about 2mm, and a plurality of rows are arranged between the first header 16 and the second header 17, so that the injection amount of refrigerant can be reduced, the Reynolds coefficient outside the heat exchange tubes is high, and the heat exchange can be facilitated.
A refrigerating system of a dry evaporator comprises a compressor, a condenser and the dry evaporator, wherein an outlet of the condenser is connected with a liquid inlet end 15 of a heat regenerator 10 of the dry evaporator, and an air outlet 3 on a gas collecting tube box 9 is connected with an air suction port of the compressor.
Claims (10)
1. The dry evaporator with the heat return device comprises a cylinder body, wherein end plates are arranged at two ends of the cylinder body, a heat exchange tube bundle is fixed between the end plates, baffle plates are arranged on the heat exchange tube bundle, a water inlet and a water outlet are arranged on the cylinder body,
the bottom of the cylinder body is provided with a liquid distribution pipe box, the top of the cylinder body is provided with a gas collecting pipe box, a heat regenerator is arranged in the gas collecting pipe box, and the upper part of the gas collecting pipe box is provided with a gas outlet;
a liquid outlet pipe is arranged on the side wall of the gas collecting pipe box between the heat regenerator and the end plate, and is communicated with the liquid distribution pipe box, so that liquid refrigerant which is not evaporated is introduced into the liquid distribution pipe box;
the liquid outlet end of the heat regenerator is communicated with the liquid distribution pipe box, and liquid refrigerant is introduced into the liquid distribution pipe box.
2. The dry evaporator with a heat regenerator according to claim 1, wherein an ejector is arranged at the inlet of the liquid distribution pipe box, and a drainage port of the ejector is communicated with the liquid outlet pipe.
3. The dry evaporator with a heat regenerator according to claim 2, wherein a liquid outlet end of the heat regenerator is communicated with an inlet of the ejector and is connected with an expansion valve.
4. The dry evaporator with regenerator according to claim 1, wherein the regenerator comprises a first header and a second header, a liquid inlet end is arranged on the first header, a plurality of thin tube bundles are communicated between the first header and the second header, and the liquid outlet end is connected to the second header.
5. The dry evaporator with a heat recovery unit according to claim 4, wherein the filament bundle is provided with a plurality of fins.
6. The dry evaporator with regenerator according to claim 1, wherein the cylinder is square and the regenerator is square.
7. The regenerator-carrying dry evaporator of claim 1, wherein the water inlet is located on a cylinder near a side of the header tank and the water outlet is located on a cylinder near a side of the distribution tank.
8. A dry evaporator with a heat return device according to claim 3, wherein the expansion valve is controlled by a degree of superheat, the degree of superheat being a degree of superheat at an air outlet of the dry evaporator, the degree of superheat being 5-10 ℃.
9. The dry evaporator with regenerator according to claim 8, wherein the superheat degree of the expansion valve is PI-controlled, the P value is 20 to 60, and the i value is 1000 to 2000.
10. A refrigeration system of a dry evaporator, comprising a compressor, a condenser, and the dry evaporator according to any one of claims 1-9, wherein an outlet of the condenser is connected to a liquid inlet end of a regenerator of the dry evaporator, and an air outlet on the gas collecting tube box is connected to an air suction port of the compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223577792.8U CN219531267U (en) | 2022-12-30 | 2022-12-30 | Dry evaporator with heat return device and refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223577792.8U CN219531267U (en) | 2022-12-30 | 2022-12-30 | Dry evaporator with heat return device and refrigerating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219531267U true CN219531267U (en) | 2023-08-15 |
Family
ID=87583164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223577792.8U Active CN219531267U (en) | 2022-12-30 | 2022-12-30 | Dry evaporator with heat return device and refrigerating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219531267U (en) |
-
2022
- 2022-12-30 CN CN202223577792.8U patent/CN219531267U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Hu Kuangyu Inventor before: Hu Kuangyu Inventor before: Li Xin Inventor before: Lian Qing Inventor before: Wang Zhonghua Inventor before: Shen Jie Inventor before: Yang Jianfeng Inventor before: Zhou Lifang Inventor before: Yu Pinlin Inventor before: Ma Shufen Inventor before: Song Zhengyuan |