Falling film return oil concentration device for flooded unit

Abstract

The utility model discloses a falling film return oil concentration device for a flooded unit. The falling film return oil concentration device comprises the flooded unit, a fluorine pump and a falling film return oil concentration device, a fluorine pump is communicated with a liquid outlet in the upper portion and a fluorine inlet of a falling film return oil concentration device in the lower portion, the fluorine inlet of the falling film return oil concentration device is communicated into the falling film return oil concentration device, and a refrigerant and oil mixture pumped in the flooded unit is subjected to heat exchange treatment in the falling film return oil concentration device. And the refrigerant gas enters the flooded unit again from the falling film return oil concentration device and flows to an inlet of the compressor through a pipeline via a fluorine outlet of the flooded unit, oil in the mixed liquid is concentrated and then discharged through an oil return port of the falling film return oil concentration device at the bottom, and the mixed liquid continues to return to the compressor for lubrication through a pipeline. Through simple and low-cost structural improvement, the accumulation phenomenon of lubricating oil in the heat exchanger is effectively reduced, the heat exchange efficiency of an evaporator and a condenser is improved, the service life of a compressor is prolonged, the lubricating oil is effectively recycled, and the effects of saving energy and improving efficiency are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to evaporator field especially full liquid unit is with falling film oil return concentration device. BACKGROUND

[0002] In general refrigeration system, contain compressor, condenser, throttling device and evaporator. Compressor needs a lot of refrigerant special lubricating oil to carry out lubricating work in the operation process. When refrigerant passes through the compression of compressor and is discharged from its outlet, carries a large amount of lubricating oil, and after the refrigerant enters the pipeline system, the lubricating oil carried by the refrigerant is accumulated in the heat exchanger, and the concentration of mixed liquid lubricating oil is higher and higher after the long-time operation of full liquid unit and the long-time work of evaporator, if not discharged in time, it can seriously affect the working efficiency of the evaporator, reduce the heat exchange efficiency of evaporator condenser, thereby causing the damage of compressor due to oil shortage.

[0003] Therefore, we need to consider the problem of lubricating oil accumulation when designing the heat exchanger, if the lubricating oil can be recycled, not only can reduce the damage of compressor, but also can effectively recycle the lubricating oil, energy saving and efficiency increasing. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a full liquid unit is with falling film oil return concentration device, reduces the accumulation phenomenon of lubricating oil in the heat exchanger, effectively improves the heat exchange efficiency of evaporator condenser, prolongs the service life of compressor, makes lubricating oil effectively recycled, energy saving and efficiency increasing.

[0005] Technical scheme: in order to achieve the above object, the utility model can adopt the following technical scheme: a full liquid unit is with falling film oil return concentration device, including full liquid unit, fluorine pump and falling film oil return concentration device;The bottom of the full liquid unit is provided with a liquid outlet hole, and the upper shell of the falling film oil return concentration device is provided with a falling film oil return concentration device fluorine inlet;The fluorine pump is connected to the liquid outlet hole above and connected to the falling film oil return concentration device fluorine inlet below;The falling film oil return concentration device fluorine inlet is communicated to the top liquid distribution device in the falling film oil return concentration device, and the top liquid distribution device is provided with a spray head below;The spray head is provided with a horizontally arranged heat exchange tube bundle below;The upper shell of the falling film oil return concentration device is also provided with a falling film oil return concentration device fluorine outlet;The falling film oil return concentration device fluorine outlet is communicated to the inside of the full liquid unit upwards, and the highest extension is close to the inner wall of the upper shell of the full liquid unit;The middle part of the upper shell of the full liquid unit is provided with a full liquid unit fluorine outlet, and the lower shell is provided with a full liquid unit fluorine inlet.

[0006] In order to make the device structure more reasonable, the bottom of the full liquid unit is provided with a liquid outlet hole for oil return near the horizontal side end third.

[0007] In order to realize the recycling of lubricating oil, the bottom of the falling film oil return concentration device and below the heat exchange tube bundle is provided with an oil storage pool; one side of the lower shell is also provided with a falling film oil return concentration device oil return port; the oil return port of the falling film oil return concentration device is communicated to the compressor oil return port through a pipeline, and the oil in the refrigerant oil mixture is further concentrated, and the concentrated liquid is accumulated in the oil storage pool at the bottom of the falling film oil return concentration device, is discharged through the falling film oil return concentration device oil return port at the bottom, and flows to the compressor oil return port through the pipeline to return to the compressor lubrication.

[0008] Further, one side of the full liquid unit in the horizontal direction is respectively provided with a full liquid unit water inlet and a full liquid unit water outlet; the same side of the falling film oil return concentration device is also respectively provided with a falling film oil return concentration device water inlet and a falling film oil return concentration device water outlet; the full liquid unit water inlet is communicated with the falling film oil return concentration device water inlet, and the full liquid unit water outlet is communicated with the falling film oil return concentration device water outlet.

[0009] In order to make the heat exchange more fully, increase the heat exchange area, and make the refrigerant in the refrigerant oil mixture fully exchange heat and gasify, the heat exchange tube bundle in the falling film oil return device is a finned heat exchange tube.

[0010] Further, a plurality of uniformly arranged nozzles are arranged below the liquid distribution device at the top of the falling film oil return device, the refrigerant oil mixture is uniformly sprayed onto the lower heat exchange tube bundle, and a liquid film is formed on the outer surface of the heat exchange tube bundle. Due to the action of gravity, the liquid film flows downward along the outer wall of the tube.

[0011] Further, the full liquid unit fluorine outlet is communicated to the compressor inlet through a pipeline.

[0012] Further, after passing through the throttle valve, the refrigerant and the lubricating oil mixture enter the evaporator inside the full liquid unit through the full liquid unit fluorine inlet, the refrigerant exchanges heat with the heat exchange tube arranged inside to evaporate into gas, and then flows out through the upper full liquid unit fluorine outlet to the compressor inlet.

[0013] Beneficial effects: the utility model has the following advantages:

[0014] The utility model discloses a simple and low-cost structure improvement, effectively reduces the accumulation of lubricating oil in the heat exchanger, improves the heat exchange efficiency of the evaporator condenser, prolongs the service life of the compressor, effectively recycles the lubricating oil, and plays the role of energy saving and efficiency increasing. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the falling film oil return concentration device structure schematic view for full liquid unit of the utility model embodiment 1;

[0016] Fig. 2It is the enlarged structure schematic diagram of axial section of falling film oil return concentration device in embodiment 1 of the utility model.

[0017] The signs are as follows: I-full liquid unit, II-fluorine pump, III-falling film oil return concentration device, 1-full liquid unit water inlet, 2-full liquid unit water outlet, 3-full liquid unit fluorine outlet, 4-full liquid unit fluorine inlet, 5-full liquid unit fluorine pump outlet, 6-full liquid unit air inlet, 7-falling film oil return concentration device water inlet, 8-falling film oil return concentration device water outlet, 9-falling film oil return concentration device fluorine inlet, 10-falling film oil return concentration device fluorine outlet, 11-falling film oil return concentration device oil return port, 12-falling film oil return concentration device oil storage tank, 13-top liquid distribution device, 14-nozzle, 15-heat exchange tube bundle. DETAILED DESCRIPTION

[0018] Embodiment 1

[0019] Please refer to Figs. 1-2 The utility model discloses a falling film oil return concentration device for full liquid unit, including full liquid unit I, fluorine pump II and falling film oil return concentration device III.

[0020] The full liquid unit I is equipped with full liquid unit fluorine outlet 3 in the middle part of the shell, and the lower shell is correspondingly equipped with full liquid unit fluorine inlet 4, and the full liquid unit fluorine outlet 3 is communicated to the compressor inlet through the pipeline.

[0021] The full liquid unit I is equipped with full liquid unit fluorine outlet 3 in the middle part of the shell, and the lower shell is correspondingly equipped with full liquid unit fluorine inlet 4, and the full liquid unit fluorine outlet 3 is communicated to the compressor inlet through the pipeline. The full liquid unit I is equipped with full liquid unit fluorine outlet 3 in the middle part of the shell, and the lower shell is correspondingly equipped with full liquid unit fluorine inlet 4, and the full liquid unit fluorine outlet 3 is communicated to the compressor inlet through the pipeline.

[0022] To solve the above problems, we increase a liquid outlet hole at the bottom of the full-liquid unit I to return oil, the falling film oil return condensation device III upper shell is provided with a falling film oil return condensation device fluorine inlet 9, the fluorine pump II is connected to the liquid outlet hole above and connected to the falling film oil return condensation device fluorine inlet 9 below; The falling film oil return condensation device fluorine inlet 9 is communicated to the top liquid distribution device 13 in the falling film oil return condensation device III, and a plurality of uniformly arranged spray heads 14 are arranged below the top liquid distribution device 13. The heat exchange tube bundle 15 is arranged horizontally below the spray head 14. In order to make the heat exchange more sufficient, increase the heat exchange area, make the refrigerant in the refrigerant oil mixture fully heat exchange and gasification, the heat exchange tube bundle 15 is finned heat exchange tube. The falling film oil return condensation device III upper shell is also provided with a falling film oil return condensation device fluorine outlet 10; The falling film oil return condensation device fluorine outlet 10 is communicated to the inside of the full-liquid unit I upward, and the highest extends to the inner wall of the upper shell of the full-liquid unit I.

[0023] In order to realize the recycling of lubricating oil, the falling film oil return condensation device III is provided with an oil storage pool 12 at the bottom and below the heat exchange tube bundle 15; The lower shell is also provided with a falling film oil return condensation device oil return port 11 on one side; The falling film oil return condensation device oil return port 11 is communicated to the compressor oil return port through the pipeline, the oil in the refrigerant oil mixture is further condensed, and the condensed liquid is accumulated in the oil storage pool 12 at the bottom of the falling film oil return condensation device III, and is discharged through the falling film oil return condensation device oil return port 11 at the bottom, and flows to the compressor oil return port through the pipeline to return to the compressor lubrication.

[0024] In addition, the full-liquid unit I is provided with a full-liquid unit water inlet 1 and a full-liquid unit water outlet 2 on one side in horizontal direction respectively; The falling film oil return condensation device III is also provided with a falling film oil return condensation device water inlet 7 and a falling film oil return condensation device water outlet 8 on the same side respectively; The full-liquid unit water inlet 1 is communicated with the falling film oil return condensation device water inlet 7, and the full-liquid unit water outlet 2 is communicated with the falling film oil return condensation device water outlet 8.

[0025] Working process:

[0026] The refrigerant and lubricating oil mixture after the throttle valve in the flooded unit I is injected into the flooded evaporator through the flooded unit inlet 4. After long time operation, the lubricating oil is mixed in the evaporator liquid, and the concentration of the mixed liquid lubricating oil is higher and higher after long time work of the evaporator. The refrigerant and lubricating oil mixture in the flooded unit I is extracted from the flooded unit extraction outlet 5 through the fluorine pump II, and then is injected into the falling film oil return concentration device III shell from the falling film oil return concentration device fluorine inlet 9. The mixed liquid is uniformly sprayed on the horizontal heat exchange tube bundle 15 below through the nozzle 14 by the top liquid distribution device 13, and the liquid film is formed on the outer surface of the heat exchange tube bundle 15. The liquid film flows downward along the outer wall of the tube under the action of gravity, and the refrigerant gas is extracted from the falling film oil return concentration device fluorine outlet 10 after the heat exchange between the liquid film and the heat exchange tube bundle 15. The refrigerant gas reaches the flooded unit gas inlet 6 through the pipeline, and then flows to the compressor inlet through the flooded unit fluorine outlet 3.

[0027] The heat exchange tube bundle 15 adopts the finned heat exchange tube, the heat exchange area is increased, the refrigerant in the mixed liquid is fully heat exchanged and gasified, the oil in the mixed liquid is further concentrated, and the concentrated liquid is accumulated in the oil storage tank 12 at the bottom of the falling film oil return concentration device III. The concentrated liquid is discharged through the bottom falling film oil return concentration device oil return port 11, and then flows to the compressor oil return port through the pipeline.

[0028] The utility model discloses a simple and low-cost structure improvement, effectively reduces the accumulation phenomenon of lubricating oil in the heat exchanger, improves the heat exchange efficiency of the evaporator condenser, prolongs the service life of the compressor, makes lubricating oil get effective recycling, plays the role of energy saving and efficiency increasing.

Claims

1. A falling film oil return condensing device for a flooded chiller characterized in that The full-liquid unit, the fluorine extraction pump and the falling film oil return and concentration device are provided with the liquid outlet hole at the bottom of the full-liquid unit, the falling film oil return and concentration device inlet fluorine port on the upper shell of the falling film oil return and concentration device, the fluorine extraction pump connected to the liquid outlet hole at the top and connected to the falling film oil return and concentration device inlet fluorine port at the bottom.

2. The falling film oil return condensing device for a flooded chiller as set forth in claim 1, wherein: The full-liquid unit is provided with the liquid outlet hole at the bottom of the full-liquid unit.

3. The falling film oil return condensing device for a flooded chiller as set forth in claim 1, wherein: The falling film oil return and concentration device is provided with the oil storage tank at the bottom of the falling film oil return and concentration device and below the heat exchange pipe bundle.

4. The falling film oil return condensing unit for flooded equipment of claim 1, wherein: The full-liquid unit is provided with the full-liquid unit water inlet and the full-liquid unit water outlet on the horizontal side of the full-liquid unit. The full-liquid unit water inlet and the falling film oil return and concentration device water inlet are communicated, and the full-liquid unit water outlet and the falling film oil return and concentration device water outlet are communicated.

5. The falling film oil return condensing device for a flooded chiller as set forth in claim 1, wherein: The heat exchange pipe bundle in the falling film oil return and concentration device is the finned heat exchange pipe.

6. The falling film oil return condensing device for a flooded chiller of claim 1, wherein: The falling film oil return and concentration device is provided with the plurality of evenly arranged spray heads below the top liquid distribution device.

7. The falling film oil return condensing device for a flooded chiller of claim 1, wherein: The full-liquid unit is provided with the full-liquid unit fluorine outlet through the pipeline to the compressor inlet.

8. The falling film oil return condensing device for a flooded chiller of claim 1, wherein: The falling film oil return and concentration device is provided with the falling film oil return and concentration device fluorine outlet on the upper shell.

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