CN216716637U

CN216716637U - Finned tube evaporator system for large-scale wind power environmental control

Info

Publication number: CN216716637U
Application number: CN202220039880.3U
Authority: CN
Inventors: 李少斌
Original assignee: Onoff Electric Co ltd
Current assignee: Onoff Electric Co ltd
Priority date: 2022-01-07
Filing date: 2022-01-07
Publication date: 2022-06-10
Anticipated expiration: 2032-01-07

Abstract

The utility model provides a large-scale finned tube evaporator system for wind power environmental control, which belongs to the technical field of wind power environmental control refrigeration and comprises a finned tube evaporator body and an n-1-level gas-liquid separation reflux device, wherein the finned tube evaporator body comprises an n-level evaporation module; wherein, the first-stage evaporation module is provided with a total liquid inlet, the last-stage evaporation module is provided with a total gas outlet, and n is a natural number more than or equal to 2; the gas-liquid separation reflux devices are provided with a liquid inlet pipe, a liquid discharge pipe and an exhaust pipe, and each group of gas-liquid separation reflux devices are connected in series between the liquid outlet of the upper-stage evaporation module and the liquid inlet of the lower-stage evaporation module in a one-to-one correspondence manner. According to the large-scale wind-power ring-control fin tube type evaporator system, the gas-liquid separation reflux device is arranged between the two adjacent stages of heat exchange modules, so that the refrigerant gas generated by boiling heat exchange is timely shunted, the contact area with the refrigerant liquid on the inner wall of the subsequent heat exchange pipeline is ensured, and the heat exchange efficiency of the heat exchanger is improved.

Description

Finned tube evaporator system for large-scale wind power environmental control

Technical Field

The utility model belongs to the technical field of refrigeration, and particularly relates to a fin tube type evaporator system for large-scale wind power environmental control.

Background

At present, the equipment volume of large fin tube evaporators for most wind power projects is huge, the heat exchange area in the tubes cannot be fully utilized in the evaporation process, a gas-liquid separator is generally arranged at the outlet of the evaporator to improve the heat exchange efficiency, but refrigerant liquid separated in the gas-liquid separator does not flow back to the evaporator to cause the loss of the refrigeration capacity of the refrigerant, meanwhile, gas generated by boiling evaporation of the refrigerant on the upper part in an evaporator pipeline is reduced, the contact chance of the refrigerant liquid and the boiling heat exchange of the inner wall surface of the heat exchange tube is reduced, the heat exchange area is reduced, and the heat exchange efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a large-scale finned tube evaporator system for wind power environmental control, which aims to timely shunt gas generated by boiling heat exchange, ensure the contact area of refrigerating liquid on the inner wall of a subsequent heat exchange pipeline, improve the overall effective heat exchange area of a heat exchanger and improve the heat exchange efficiency.

In order to achieve the purpose, the utility model adopts the technical scheme that: there is provided a large scale finned tube evaporator system for wind power environmental control, comprising: the finned tube type evaporator comprises a finned tube type evaporator body and an n-1 level gas-liquid separation reflux device, wherein the finned tube type evaporator body comprises n levels of evaporation modules; wherein, the first-stage evaporation module is provided with a total liquid inlet, the last-stage evaporation module is provided with a total gas outlet, and n is a natural number more than or equal to 2; the gas-liquid separation reflux device is provided with a liquid inlet pipe, a liquid discharge pipe and an exhaust pipe, wherein each stage of the gas-liquid separation reflux device is connected in series between the liquid outlet of the last stage evaporation module and the liquid inlet of the next stage evaporation module in a one-to-one correspondence manner, so that liquid separated by the gas-liquid separation reflux device flows back through the liquid inlet of the next stage evaporation module, and separated gas is discharged through the exhaust pipe.

In one possible implementation, each stage of the gas-liquid separation reflux device comprises: the liquid inlet pipe is arranged on the side surface of the separation shell, the liquid discharge pipe is arranged at the bottom of the separation shell, and the exhaust pipe is arranged at the top of the separation shell; the muffler is arranged in the separation shell and is in seamless butt joint with the exhaust pipe.

In a possible implementation manner, the air return pipe is of a U-shaped structure, the first end of the air return pipe is an air inlet, and the second end of the air return pipe is connected with the exhaust pipe.

In a possible implementation manner, the U-shaped structure is provided with an oil return hole.

In one possible embodiment, a plurality of liquid level glasses with different heights are arranged on the separation housing along the height direction of the separation housing.

In one possible implementation, the finned tube evaporator system further includes: an air outlet header communicated with the main air outlet and an air outlet branch pipe corresponding to the gas-liquid separation reflux device, wherein the air outlet branch pipe is communicated with the air outlet pipe; each of the exhaust branch pipes is in parallel communication with the outlet header.

In a possible implementation manner, a throttling capillary tube, an adjusting hand valve and an electromagnetic valve are connected in series on the exhaust branch pipe.

In a possible implementation manner, the lengths of the throttling capillaries connected with the gas-liquid separation and return devices at each stage are gradually reduced from one stage of the evaporation module to the last stage of the evaporation module.

In one possible implementation, the bottom of the outlet header is provided with an oil return elbow.

In a possible implementation manner, the n-stage evaporation modules include a first-stage evaporation module, a second-stage evaporation module and a last-stage evaporation module, and the lengths of the heat exchange tubes in the evaporation modules decrease from the first-stage evaporation module to the last-stage evaporation module.

Compared with the prior art, the large-scale finned tube evaporator system for wind power environmental control provided by the utility model has the beneficial effects that: firstly, an evaporator is divided into a plurality of stages of heat exchange modules, a gas-liquid separation reflux device is arranged between two adjacent stages of heat exchange modules, refrigerant gas generated by boiling heat exchange is timely shunted, the contact area of the refrigerant gas and the refrigerant liquid on the inner wall of a subsequent heat exchange pipeline is ensured, and the heat exchange efficiency of the heat exchanger is improved; secondly, the heat exchange area in the tube can be fully utilized, so that the overall volume of the heat exchanger can be reduced under the same heat exchange condition, the manufacturing cost is saved, and the occupied space volume is reduced; and thirdly, lubricating oil contained in the refrigerant liquid can be effectively separated in time, and the thermal resistance formed by attaching an oil film to the inner wall of the heat exchange tube is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a large-scale fin-tube evaporator system for wind power environmental control according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a first-stage gas-liquid separation reflux device provided in an embodiment of the present invention;

description of reference numerals:

1. an expansion valve; 2. n-stage evaporation modules; 21. a primary evaporation module; 22. a secondary evaporation module; 23. a final stage evaporation module; 31. a first-stage gas-liquid separation reflux device; 311. separating the shell; 312. a liquid inlet pipe; 313. a liquid discharge pipe; 314. a low-level oil return hole; 315. a low level liquid viewing mirror; 316. a high-level oil return hole; 317. a middle level liquid sight lens; 318. a high level liquid viewing mirror; 319. an exhaust pipe; 320. an air return pipe; 32. a second-stage gas-liquid separation reflux device; 41. a first-stage throttling capillary tube; 42. a secondary throttling capillary tube; 51. a primary regulating hand valve; 52. a secondary regulating hand valve; 61. a primary electromagnetic valve; 62. a secondary electromagnetic valve; 7. an exhaust branch pipe; 8. an outlet manifold.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit the utility model.

Referring to fig. 1 and fig. 2, a description will now be given of a fin-tube evaporator system for large-scale wind power environmental control according to the present invention. The fin tube evaporator system for large-scale wind power environmental control comprises: the finned tube evaporator comprises a finned tube evaporator body and an n-1 stage gas-liquid separation reflux device, wherein the finned tube evaporator body comprises n stages of evaporation modules 2; wherein, the first-stage evaporation module 21 is provided with a total liquid inlet, the last-stage evaporation module 23 is provided with a total gas outlet, and n is a natural number more than or equal to 2; the gas-liquid separation reflux device is provided with a liquid inlet pipe 312, a liquid discharge pipe 313 and an exhaust pipe 319, and each stage of gas-liquid separation reflux device is connected in series between the liquid outlet of the last stage evaporation module and the liquid inlet of the next stage evaporation module in a one-to-one correspondence manner, so that liquid separated by the gas-liquid separation reflux device flows back through the liquid inlet of the next stage evaporation module, and separated gas is discharged through the exhaust pipe 319.

Compared with the prior art, the fin tube type evaporator system for large-scale wind power environmental control provided by the embodiment has the advantages that firstly, the evaporator is divided into the multi-stage heat exchange modules, the gas-liquid separation reflux device is arranged between the two adjacent stages of heat exchange modules, the refrigerant gas generated by boiling heat exchange is timely shunted, the contact area of the refrigerant gas and the refrigerant liquid on the inner wall of the subsequent heat exchange pipeline is ensured, and the heat exchange efficiency of the heat exchanger is improved; secondly, the heat exchange area in the tube can be fully utilized, so that the overall volume of the heat exchanger can be reduced under the same heat exchange condition, the manufacturing cost is saved, and the occupied space volume is reduced; and thirdly, lubricating oil contained in the refrigerant liquid can be effectively separated in time, and the thermal resistance formed by attaching an oil film to the inner wall of the heat exchange tube is reduced.

In this embodiment, the level of the evaporation module is set according to the sequence of refrigerant backflow, the n-stage evaporation module 2 includes a first-stage evaporation module 21, a second-stage evaporation module 22, a third-stage evaporation module … … and a last-stage evaporation module 23, and the number of the evaporation module is selected according to the system design requirement.

The gas-liquid separation and recovery process comprises the following steps: the high-temperature high-pressure refrigerant liquid after heat release from the condenser is throttled by the expansion valve 1 and then changed into low-temperature low-pressure liquid, the liquid enters the primary evaporation module 21, the gas-liquid mixed state obtained after evaporation and boiling of the primary evaporation module 21 enters the gas-liquid separation reflux device, so that the refrigerant gas is discharged through the exhaust pipe 319, the refrigerant liquid is discharged to the secondary evaporation module 22 through the liquid discharge pipe 313, and by analogy, the sufficient contact area between the subsequent refrigerant liquid and the inner wall of the heat exchange pipeline is ensured through gas-liquid separation and liquid recovery, and the heat exchange efficiency is improved.

As a specific implementation manner of the large-scale fin-tube evaporator system for wind power environmental control according to the embodiment of the present invention, referring to fig. 2, each stage of the gas-liquid separation and reflux device includes a separation shell 311 and an air return pipe 320, a liquid inlet pipe 312 is disposed on a side surface of the separation shell 311, a liquid discharge pipe 313 is disposed at a bottom of the separation shell 311, and an air discharge pipe 319 is disposed at a top of the separation shell 311; the muffler 320 is disposed in the separation housing 311 and is in seamless contact with the exhaust pipe 319. The gas-liquid mixed state obtained after the evaporation by the primary evaporation module 21 enters the separation shell 311, the liquid refrigerant and the lubricating oil sink to the bottom of the separation shell 311, and the gaseous refrigerant is discharged from the exhaust pipe 319 through the gas return pipe 320; the liquid refrigerant and the lubricating oil which sink to the bottom of the separation shell 311 are layered due to low temperature and density difference, the lubricating oil and the liquid refrigerant are layered, the lubricating oil is arranged on the upper layer, the liquid refrigerant on the lower layer can flow back to the secondary evaporation module 22 through the liquid discharge pipe 313 on the bottom, evaporation is carried out again, and then the liquid refrigerant enters the next group of gas-liquid separation reflux devices to be subjected to gas-liquid separation again. The full recovery and evaporation of the refrigerant are realized, and the working efficiency of the evaporator is ensured.

As a specific embodiment of the gas-liquid separation and recirculation apparatus provided in this embodiment, as shown in fig. 2, the gas return pipe 320 has a U-shaped structure, a first end of which is an inlet, and a second end of which is connected to the exhaust pipe 319. As the refrigerant gas flows upward and fills the top of the separation housing 311, the inlet opening of the return pipe 320 is directed upward. Specifically, the gas return pipe 320 and the gas exhaust pipe 319 may be connected by a pipe joint, and the gas inlet of the gas return pipe 320 is provided with an inclined surface, so that the refrigerant gas can enter the gas return pipe 320 and enter the gas exhaust pipe 319 from the gas return pipe 320.

As a possible implementation manner, in this embodiment, referring to fig. 2, the U-shaped structure is provided with an oil return hole. After the refrigerant in a gas-liquid mixed state enters the separation shell 311, the liquid refrigerant and the lubricating oil sink and are layered, and the existence of the lubricating oil can affect the evaporation effect of the refrigerant, so that the lubricating oil enters the air return pipe 320 through the oil return hole through the arranged oil return hole, the separated refrigerant gas and the separated lubricating oil smoothly return to the refrigerant air return pipe 320, the lubricating oil is discharged from the air exhaust pipe 319 along with the airflow of the refrigerant gas, and the high-efficiency heat exchange effect of the evaporator is ensured while the operation safety of the compressor is ensured.

Since the liquid refrigerant cooled in the gas-liquid mixed refrigerant flows back to the next-stage evaporation module 21 from the liquid discharge pipe 313 and an oil-rich layer is formed on the upper layer of the refrigerant and the lubricating oil liquid in the separation housing 311, in this embodiment, micro oil return holes are respectively formed at different heights at the curved bottom of the U-shaped air return pipe 320, so as to facilitate the return of the lubricating oil. The two oil return holes with different heights are respectively a low-level oil return hole 314 and a high-level oil return hole 316.

Referring to fig. 2, in order to conveniently observe the heights of the refrigerant liquid and the lubricant inside the separation housing 311 and ensure the height of the lubricant at the oil return hole, a plurality of liquid level mirrors with different heights are arranged on the separation housing 311 along the height direction. In the present embodiment, three level-different liquid mirrors, that is, a low level liquid mirror 315, a middle level liquid mirror 317, and a high level liquid mirror 318 are provided, wherein the liquid level in the separation housing 311 is controlled between the low level liquid mirror 315 and the middle level liquid mirror 317.

Referring to fig. 1, a specific implementation of a large-scale finned tube evaporator system for wind power environmental control according to an embodiment of the present invention is further illustrated, and the finned tube evaporator system further includes: an air outlet header 8 communicated with the main air outlet and an air outlet branch pipe 7 corresponding to the gas-liquid separation reflux device, wherein the air outlet branch pipe 7 is communicated with an air outlet pipe 319; each exhaust branch pipe 7 communicates in parallel with the outlet header 8. The gas and the lubricating oil collected by each gas-liquid separation and return device pass through the respective exhaust branch pipes 7, and are finally converged with the gas discharged by the final evaporation module 23 to be discharged on the gas outlet header 8. In this embodiment, the gas-liquid separation/recirculation apparatuses have the same structure, and the exhaust branch pipe 7, the exhaust pipe 319, the drain pipe 313, and the liquid inlet pipe 312, which are correspondingly connected to each other, are not labeled separately.

In some possible embodiments, referring to fig. 1, the exhaust branch pipe 7 is provided with a throttling capillary tube, a regulating hand valve and an electromagnetic valve in series. By adjusting the adjusting hand valve, the liquid level of the liquid refrigerant in the gas-liquid separation and return device is ensured to be positioned between the low level liquid viewing mirror 315 and the middle level liquid viewing mirror 317, so that the pressure of the refrigerant behind the electromagnetic valve is ensured to be consistent with the pressure of the gas refrigerant at the outlet of the last evaporation module 23, the gas backflow is avoided, and the gas is ensured to be discharged from the gas outlet header 8. The throttle capillary tube functions to throttle down the pressure and regulate the flow of the gas and the lubricant oil entering the discharge pipe 319 to smoothly discharge the refrigerant gas to converge on the outlet header 8.

In a possible implementation manner, referring to fig. 1, the lengths of the throttling capillaries connected with the gas-liquid separation reflux devices are gradually decreased from the first stage to the last stage of the evaporation module. After the first-stage evaporation and the gas-liquid separation, the flow rates of the lubricating oil and the gas in the liquid refrigerant are reduced, so that the throttling capillary tube connected to the gas-liquid separation reflux device corresponding to the second-stage evaporation module 22 can be correspondingly shorter, the effects of stabilizing the pressure and the flow can be achieved, and the reduction of the manufacturing cost is facilitated.

In some possible embodiments, see fig. 1, the bottom of the outlet header 8 is provided with an oil return bend.

Based on the above embodiments, referring to fig. 1, in some possible embodiments, the n-stage evaporation module 2 includes a first-stage evaporation module 21, a second-stage evaporation module 22 and a last-stage evaporation module 23, and the length of the heat exchange tubes in each evaporation module decreases from the first-stage evaporation module 21 to the last-stage evaporation module 23. Because refrigerant liquid is behind one-level evaporation and gas-liquid separation, when getting into next-level evaporation module, the refrigerant is more and more pure, and because the separation of oil and gas, increased the area of contact of refrigerant liquid with the heat transfer pipeline inner wall in other words, improved the efficient of heat transfer, consequently, the evaporation module can be degressive step by step from the length of one-level to the last heat exchange tube, when guaranteeing evaporation heat exchange efficiency, through optimizing the structure, reduces the cost of manufacture.

In this embodiment n is 3, the embodiment corresponds to a three-stage evaporation module, and is provided with a two-stage gas-liquid separation reflux device, the two-stage gas-liquid separation reflux device has the same structure, in order to highlight the characteristics of the fractional evaporation, the one-stage gas-liquid separation reflux device 31 is connected with the one-stage evaporation module 21, and the two-stage gas-liquid separation reflux device 32 is connected between the two-stage evaporation module 22 and the last-stage evaporation module 23.

Referring to fig. 1 and 2, a first-stage throttling capillary tube 41, a first-stage regulating hand valve 51 and a first-stage electromagnetic valve 61 are arranged on the exhaust branch tube 7 corresponding to the first-stage gas-liquid separation and return device 31, and a second-stage throttling capillary tube 42, a second-stage regulating hand valve 52 and a second-stage electromagnetic valve 62 are arranged on the exhaust branch tube 7 corresponding to the second-stage gas-liquid separation and return device 32; the two-stage regulating hand valve and the electromagnetic valve can be of the same type; the two exhaust branch pipes 7 may be of the same pipe diameter, and the exhaust branch pipes 7 are not labeled separately, and the return pipes 320 in the separation housing 311 are not labeled separately.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

Based on the three-stage evaporation module, the working flow of the finned tube evaporator system provided by the embodiment is as follows:

the high-temperature high-pressure refrigerant liquid after heat release of the condenser is throttled by the expansion valve 1 and then changed into low-temperature low-pressure liquid, the low-temperature low-pressure liquid absorbs heat in the evaporator pipeline, boils and evaporates into a gas-liquid mixed state, the gas-liquid mixed state refrigerant reduces the contact area between the liquid refrigerant and the inner surface of the heat exchange pipeline due to participation of refrigerant gas in the pipeline, so that the evaporation strength is reduced, a gas-liquid separation reflux device is added in the process, the refrigerant gas generated by boiling heat exchange is timely shunted, the contact area between the refrigerant gas and the refrigerant liquid on the inner wall of the subsequent heat exchange pipeline is ensured, meanwhile, the refrigerant gas at the shunting part and lubricating oil precipitated in the shunting device smoothly return to the refrigerant gas outlet header 8, the high-efficiency heat exchange effect of the evaporator is ensured, and the running safety of the compressor is ensured.

Referring to fig. 1 and 2, the specific process is as follows: the high-temperature high-pressure refrigerant liquid after heat release of the condenser is throttled by an expansion valve 1 and then changed into low-temperature low-pressure liquid, the low-temperature low-pressure liquid enters a first-stage evaporation module 21, the low-temperature low-pressure liquid absorbs heat in a pipeline of the first-stage evaporation module and is boiled and evaporated into a gas-liquid mixed state to enter a first-stage gas-liquid separation reflux device 31, the liquid refrigerant and lubricating oil sink to the bottom of the device in the first-stage gas-liquid separation reflux device 31, the gaseous refrigerant is positioned at the top of the device, the refrigerant and the lubricating oil form a layered layer due to the low temperature of the liquid refrigerant at the moment, the upper layer is an oil-rich layer, the refrigerant gas flows out through a gas return pipe 320, 2 micro oil return holes are formed in the lower part of the gas return pipe 320 at different heights, so that the lubricating oil rich in the oil layer is discharged out of the first-stage gas-liquid separation reflux device 31 together depending on the gas flow velocity while the refrigerant gas flows out to a corresponding first-stage exhaust branch pipe 7 and passes through a first-stage throttling capillary tube 41, The first-stage regulating hand valve 51 and the first-stage electromagnetic valve 61 reach the refrigerant outlet header 8; by adjusting the first-stage adjusting hand valve 51, the liquid level of the liquid refrigerant in the first-stage gas-liquid separation reflux device 31 can be ensured to be positioned between the low-level liquid viewing mirror 315 and the middle-level liquid viewing mirror 317, so that the pressure of the refrigerant passing through the first-stage electromagnetic valve 61 is ensured to be consistent with the pressure of the gas refrigerant at the outlet of the last-stage evaporation module 23, and the refrigerant at the bottom in the first-stage gas-liquid separation reflux device 31 flows back to the second-stage evaporation module 22 through the liquid discharge pipe 313; the refrigerant circulation between the second-stage evaporation module 22 and the last-stage evaporation module 23 is consistent with the refrigerant circulation between the first-stage evaporation module 21 and the second-stage evaporation module 22 in principle; the liquid refrigerant discharged from the liquid discharge pipe 313 of the two-stage gas-liquid separation and return device 32 is completely evaporated into gas refrigerant in the last-stage evaporation module 23, and the gas refrigerant generated by the previous two-stage evaporation is totally converged to the refrigerant outlet header 8, and a refrigeration oil return bend is formed at a bent pipe at the bottom of the refrigerant outlet header 8, so that smooth oil return from the pipeline system to the compressor is ensured.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A large-scale wind-powered finned tube evaporator system for environmental control, comprising:

the finned tube evaporator body comprises n-stage evaporation modules (2); wherein, the first-stage evaporation module (21) is provided with a total liquid inlet, the last-stage evaporation module (23) is provided with a total gas outlet, and n is a natural number more than or equal to 2; and

the n-1 stage gas-liquid separation reflux device is provided with a liquid inlet pipe (312), a liquid discharge pipe (313) and an exhaust pipe (319), wherein each stage of gas-liquid separation reflux device is connected in series between a liquid outlet of a previous stage evaporation module and a liquid inlet of a next stage evaporation module in a one-to-one correspondence manner, so that liquid separated by the gas-liquid separation reflux device flows back through the liquid inlet of the next stage evaporation module, and separated gas is discharged through the exhaust pipe (319).

2. The large-scale wind power finned tube evaporator system according to claim 1, wherein each stage of the gas-liquid separation reflux unit comprises:

the separation shell (311), the liquid inlet pipe (312) is arranged on the side surface of the separation shell (311), the liquid outlet pipe (313) is arranged at the bottom of the separation shell (311), and the gas outlet pipe (319) is arranged at the top of the separation shell (311); and

and the air return pipe (320) is arranged in the separation shell (311) and is in seamless butt joint with the exhaust pipe (319).

3. The large scale wind-powered finned tube evaporator system according to claim 2, wherein the air return tube (320) is a U-shaped structure with an air inlet at a first end and an air outlet tube (319) at a second end.

4. The large scale wind power finned tube evaporator system of claim 3, wherein the U-shaped structure is provided with oil return holes.

5. The large-scale wind-powered finned tube evaporator system according to claim 2, wherein the separation shell (311) is provided with a plurality of liquid-viewing mirrors with different heights along the height direction.

6. The large scale wind power finned tube evaporator system of claim 1 further comprising:

an outlet header (8) communicating with the main exhaust port; and

the exhaust branch pipe (7) corresponds to the gas-liquid separation reflux device, and the exhaust branch pipe (7) is communicated with the exhaust pipe (319); each exhaust branch pipe (7) is communicated with the air outlet header (8) in parallel.

7. The large-scale fin-tube evaporator system for the wind power environmental control according to claim 6, wherein a throttling capillary tube, a regulating hand valve and an electromagnetic valve are arranged on the exhaust branch pipe (7) in series.

8. The large-scale wind power finned tube evaporator system according to claim 7, wherein the length of the throttling capillary tube connected with each gas-liquid separation reflux device is gradually reduced from the first stage to the last stage of the evaporation module.

9. A large fin-tube evaporator system for wind power environmental control according to claim 6, characterized in that the bottom of the outlet header (8) is provided with an oil return bend.

10. A large scale wind-powered finned tube evaporator system according to any of claims 1 to 9 in which the n stages of evaporation modules (2) comprise a primary evaporation module (21), a secondary evaporation module (22) and a final evaporation module (23), the length of the heat exchange tubes in each evaporation module decreasing from the primary evaporation module (21) to the final evaporation module (23).