CN211823273U

CN211823273U - Novel floating oil return device for flooded evaporator

Info

Publication number: CN211823273U
Application number: CN201921082073.4U
Authority: CN
Inventors: 刘国兴; 林国银; 张俊
Original assignee: Green Cube Energy Technology Jiangsu Co ltd
Current assignee: Green Cube Energy Technology Jiangsu Co ltd
Priority date: 2019-07-11
Filing date: 2019-07-11
Publication date: 2020-10-30
Anticipated expiration: 2029-07-11

Abstract

The utility model provides a novel floating oil return device for a flooded evaporator, which comprises a fixed oil return pipe, a floating oil return pipe and a floating ball; the cross section of the floating oil return pipe is inverted T-shaped, the floating oil return pipe is divided into a vertical pipeline perpendicular to the liquid level and a U-shaped pipeline communicated with the bottom of the vertical pipeline, the top opening of the vertical pipeline is an oil return outlet, and two top openings of the U-shaped pipeline are floating oil return ports; the vertical pipeline of the floating oil return pipe is sleeved outside the fixed oil return pipe and can move up and down along the fixed oil return pipe; the floating ball is connected with the floating oil return pipe, and the air tightness is ensured; when the liquid level of the refrigerant changes, the floating ball drives the floating type oil return pipe to move up and down along the fixed type oil return pipe, so that the relative position of the floating oil return port and the liquid level is always kept unchanged. The utility model discloses a floater drives floating oil return pipe and reciprocates along fixed oil return pipe, realizes proving that the effective oil return of evaporimeter refrigeration oil.

Description

Novel floating oil return device for flooded evaporator

Technical Field

The utility model belongs to the technical field of the hydraulic filling formula air conditioning unit, concretely relates to novel floating oil returning device for hydraulic filling formula evaporimeter.

Background

The flooded evaporator is a main component of the flooded air conditioning unit. When the flooded water chilling unit operates, a part of the refrigeration oil in the compressor enters the condenser along with the high-temperature and high-pressure refrigerant gas, is mixed in the condensed liquid refrigerant, and then enters the flooded evaporator after throttling and pressure reduction by the throttling mechanism. Because of the structural characteristics of the flooded evaporator, the flow rate of refrigerant gas in the shell pass is very low, and the refrigerant oil entering the shell pass cannot be brought back to the compressor by the refrigerant gas returning to the compressor at a certain flow rate like a dry evaporator, so that an evaporator oil return device needs to be added, and the refrigerant oil enriched on the upper layer of the liquid refrigerant in the shell pass of the evaporator is sent back to the compressor by the evaporator oil return device.

Therefore, for a flooded evaporator, the smooth return of the refrigerant oil to the compressor is critical to the proper operation of the entire system, and is mainly determined by the control of the refrigerant level and the position of the oil return port. However, in the operation of a refrigeration or heat pump system, the liquid level of the evaporator is floated due to the change of load, and the oil return port is fixed at present, so that the compressor is stopped due to oil loss caused by that the oil return port can not suck the refrigerant oil sometimes. The device is provided, so that the oil return port floats along with the floating of the liquid level, the oil return port is always kept at the optimum oil return position, and the device plays a great role in ensuring the oil return of a system and the normal operation of the system.

Disclosure of Invention

To the weak point among the prior art, the utility model provides a novel floating oil returning device for flooded evaporator, its simple structure, and can effectively guarantee the evaporimeter refrigeration oil return.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a novel floating oil return device for a flooded evaporator comprises a fixed oil return pipe, a floating oil return pipe and a floating ball; the cross section of the floating oil return pipe is inverted T-shaped, the floating oil return pipe is divided into a vertical pipeline perpendicular to the liquid level and a U-shaped pipeline communicated with the bottom of the vertical pipeline, the top opening of the vertical pipeline is an oil return outlet, and two top openings of the U-shaped pipeline are floating oil return ports; the vertical pipeline of the floating oil return pipe is sleeved outside the fixed oil return pipe and can move up and down along the fixed oil return pipe; the floating ball is connected with the floating oil return pipe, and the air tightness is ensured; when the liquid level of the refrigerant changes, the floating ball drives the floating type oil return pipe to move up and down along the fixed type oil return pipe, so that the relative position of the floating oil return port and the liquid level is always kept unchanged.

Furthermore, the center of the floating ball is fixedly sleeved outside the floating oil return pipe, and the air tightness is ensured.

Has the advantages that: the utility model discloses a floater drives floating oil return pipe and reciprocates along fixed oil return pipe, realizes the effective oil return of evaporimeter refrigeration oil.

Drawings

Fig. 1 is the utility model provides a structural schematic diagram of a novel floating oil return device for a flooded evaporator.

In the figure, 1-a fixed oil return pipe, 2-a floating oil return pipe, 3-a floating ball, 4-a limiting plate, 5-a floating oil return port, 6-an oil return outlet, 7-a liquid level, 8-a vertical pipeline and 9-a U-shaped pipeline.

Detailed Description

The present invention is described below with reference to specific examples. It will be understood by those skilled in the art that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention in any way.

A novel floating oil return device for a flooded evaporator comprises a fixed oil return pipe 1, a floating oil return pipe 2 and a floating ball 3; the section of the floating oil return pipe 2 is inverted T-shaped, the floating oil return pipe 2 is divided into a vertical pipeline 8 perpendicular to the liquid level 7 and a U-shaped pipeline 9 communicated with the bottom of the vertical pipeline, the top opening of the vertical pipeline 8 is an oil return outlet 6, and two top openings of the U-shaped pipeline 9 are floating oil return openings 5; the vertical pipeline 8 of the floating oil return pipe 2 is sleeved outside the fixed oil return pipe 1 and can move up and down along the fixed oil return pipe 1; the center of the floating ball 3 is fixedly sleeved outside the floating oil return pipe 2, and the air tightness is ensured; when the liquid level 7 of the refrigerant changes, the floating ball 3 drives the floating oil return pipe 2 to move up and down along the fixed oil return pipe 1, so that the relative position of the floating oil return port 5 and the liquid level 7 is always kept unchanged.

A limiting plate 4 is arranged at the upper part of the fixed oil return pipe 1; the fixed oil return pipe 1 is connected with the limiting plate 4 in a welding mode, air tightness is guaranteed, and floating height of the floating oil return pipe 2 is limited.

The utility model discloses a work flow:

under the suction of the ejector pump not disclosed in the patent content, the refrigerant oil on the upper part of the evaporator 1 enters a U-shaped pipeline 9 of a floating oil return pipe 2 from a floating oil return port 5, then enters a fixed oil return pipe 1 along a vertical pipeline 8 of the floating oil return pipe 2, and enters the ejector pump through an oil return outlet 6;

2 when the liquid level descends, the floating oil return pipe 2 descends along with the floating ball 3 along the fixed oil return pipe 1, so that the relative position of the floating oil return port 5 and the liquid level of the refrigerant is kept unchanged;

3, if the refrigerant liquid level 7 rises, the floating oil return pipe 2 rises along the fixed oil return pipe 1 along with the floating ball 3, and the relative position of the floating oil return opening 5 and the refrigerant liquid level is kept unchanged.

Claims

1. The utility model provides a novel floating oil returning device for flooded evaporator which characterized in that: the floating oil return pipe is connected with the floating ball; the cross section of the floating oil return pipe is inverted T-shaped, the floating oil return pipe is divided into a vertical pipeline perpendicular to the liquid level and a U-shaped pipeline communicated with the bottom of the vertical pipeline, the top opening of the vertical pipeline is an oil return outlet, and two top openings of the U-shaped pipeline are floating oil return ports; the vertical pipeline of the floating oil return pipe is sleeved outside the fixed oil return pipe and can move up and down along the fixed oil return pipe; the floating ball is connected with the floating oil return pipe, and the air tightness is ensured; when the liquid level of the refrigerant changes, the floating ball drives the floating type oil return pipe to move up and down along the fixed type oil return pipe, so that the relative position of the floating oil return port and the liquid level is always kept unchanged.

2. The novel floating oil return device for flooded evaporators of claim 1, wherein: the floating ball is fixedly sleeved outside the floating oil return pipe in the center.