CN216868889U

CN216868889U - Oil separating mechanism of compressor refrigerating system

Info

Publication number: CN216868889U
Application number: CN202221376744.XU
Authority: CN
Inventors: 梁亮; 梁文通; 李永堂
Original assignee: Yantai Jiaqun Efficient Energy Saving Equipment Co ltd
Current assignee: Yantai Jiaqun Efficient Energy Saving Equipment Co ltd
Priority date: 2022-06-06
Filing date: 2022-06-06
Publication date: 2022-07-01
Anticipated expiration: 2032-06-06

Abstract

The utility model discloses an oil separating mechanism of a compressor refrigerating system, which comprises an oil return pipe, a condenser and a compressor, wherein the upper end of the oil return pipe is connected with the bottom side of an air inlet collecting pipe of the condenser and is used for leading out oil phase deposited in the air inlet collecting pipe; the lower end of the oil return pipe is connected with an exhaust pipe between the compressor and the oil separator, or the lower end of the oil return pipe is connected with the oil separator. After the high-temperature high-pressure refrigeration working medium carrying the oil phase enters the air inlet collecting pipe of the condenser, the temperature is reduced and the operation space is enlarged, the molecular motion of lubricating oil is slowed, and fine particles of the oil phase are gathered and settled on the bottom side of the collecting pipe.

Description

Oil separating mechanism of compressor refrigerating system

Technical Field

The utility model relates to a gas-liquid separation mechanism, in particular to a gas-liquid separation mechanism of a compressor refrigeration system.

Background

In a compressor refrigeration system, a high-temperature and high-pressure refrigeration working medium (such as ammonia or Freon) discharged from a compressor exhaust end contains lubricating oil, and oil-gas separation is needed before the part of the refrigeration working medium enters a condenser. As the prior art, the exhaust pipe of the compressor is connected with an oil separator, the gas phase discharge end of the oil separator is connected with the air inlet manifold of the condenser through an air conveying pipeline, and the oil phase discharge end of the oil separator is connected with the compressor through an oil return pipeline.

The high-temperature high-pressure refrigerant separated by the oil separator still contains part of oil phase, which is mainly because the oil phase has high dispersity and is usually in the form of fine particles under the high-temperature high-pressure state, and is difficult to be thoroughly separated from the refrigerant in the oil separator. The oil phase enters the refrigeration system along with the working medium, which affects the refrigeration efficiency of the system, for example, liquid films are easily formed in the heat exchange tubes (or heat exchange plates) of the condenser and the evaporator, thereby affecting the heat exchange effect. In order to reduce the proportion of oil phase in the refrigerant entering the condenser as much as possible, most of the currently adopted measures are two-stage or even multi-stage oil separation devices, but the method at least has the following defects: firstly, the increase of the system running resistance leads to the increase of the compressor discharge pressure and the increase of the system energy consumption. Secondly, the problem of poor oil-gas separation effect still exists.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide an oil separation mechanism of a compressor refrigeration system, which leads out oil phase accumulated in an air inlet header of a condenser, thereby further improving the oil-gas separation effect on the premise of not increasing the running resistance of the system.

The technical scheme of the utility model is as follows:

the utility model provides a compressor refrigerating system's oil separating mechanism, compressor refrigerating system includes condenser, compressor and oil separator, the condenser includes the heat exchanger, the inlet end of heat exchanger is connected with the air intake manifold, the compressor passes through the blast pipe and connects the oil separator, the gaseous phase discharge port of oil separator passes through condenser intake-tube connection the air intake manifold, its characterized in that: the oil separation mechanism comprises an oil return pipe, the upper end of the oil return pipe is connected with the bottom side of the air inlet manifold, and the oil return pipe is used for leading out oil deposited in the air inlet manifold; the lower end of the oil return pipe is connected with the exhaust pipe, or the lower end of the oil return pipe is connected with the oil separator.

Preferably, the oil separating mechanism further comprises an oil baffle fixedly installed in the air intake manifold; the oil baffle plate is positioned on the opposite side of an air inlet which is formed in the air inlet header and is used for connecting the air inlet pipe of the condenser.

Further preferably, the oil separating mechanism further comprises an oil baffle body of a three-dimensional net structure fixed on the oil baffle plate. The oil baffle body with the three-dimensional net structure is preferably a steel wire ball.

When the lower end of the oil return pipe is connected with the exhaust pipe, an included angle alpha formed by the trend of the tail section of the oil return pipe and the trend of the exhaust pipe is an acute angle. Preferably, 5 DEG-alpha is 60 deg. Further preferably, 5 DEG-alpha is 30 deg.

Compared with the prior art, the utility model has the advantages that:

firstly, the temperature in the air inlet manifold is lower under the cooling of spray water or cold air. After the high-temperature high-pressure refrigeration working medium which comes from the oil separator and carries the oil phase enters the air inlet collecting pipe of the condenser, the temperature is reduced, the operation space is enlarged, the molecular motion of lubricating oil is slowed, and fine particles of the oil phase are gathered and settled on the bottom side of the air inlet collecting pipe.

Secondly, in the optimized technical scheme of the utility model, the oil baffle is arranged, or an oil baffle body with a three-dimensional net structure is further arranged on the basis of the oil baffle. The gas phase components of the refrigeration working medium collide with the oil baffle plate or the oil baffle body and then flow back, and then enter the heat exchange plate or the heat exchange tube, while the oil phase components are blocked by the oil baffle plate or the oil baffle body and then further aggregated into larger oil drops to be settled on the bottom side of the collecting tube. Therefore, the optimized technical scheme of the utility model can ensure that the oil separation mechanism has better separation effect.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.

Fig. 2 is a schematic view of the internal structure of an intake manifold in the second embodiment of the present invention.

Fig. 3 is a schematic view of the internal structure of an intake manifold in the third embodiment of the present invention.

In the figure, 1, a heat exchanger, 2, an air inlet manifold, 3, a condenser air inlet pipe, 4, an oil separator, 5, an oil return pipe, 6, a compressor, 7, an air suction pipe, 8, an air exhaust pipe, 9, an liquid outlet manifold, 10, a condenser liquid exhaust pipe, 11, an oil return pipe, 12, an oil baffle plate, 13, a bracket, 14, a fixed net, 15 and an oil baffle body with a three-dimensional net structure.

Detailed Description

The present invention will be further described with reference to the following specific embodiments.

Example one

Referring to fig. 1, the condenser of the compressor refrigeration system in the present embodiment includes a heat exchanger 1 composed of heat exchange tubes or heat exchange plates, an air inlet header 2 is connected to an air inlet end of the heat exchanger 1, and an air outlet header 9 is connected to an air outlet end of the heat exchanger 1. The oil separator further comprises a compressor 6 and an oil separator 4, wherein the compressor 6 is connected with the oil separator 4 through an exhaust pipe 8, a gas phase discharge port of the oil separator 4 is connected with the air inlet header 2 through a condenser air inlet pipe 3, and an oil phase discharge port of the oil separator 4 is connected with the compressor 6 through an oil return pipe 5. The liquid outlet header 9 is connected with a condenser liquid discharge pipe 10.

The condenser discharge line 10 is typically used to connect a high pressure accumulator to the suction line 7 of the compressor 6 via a low pressure recycle drum. The low-pressure circulating barrel is also connected with an evaporator through a pipeline with a circulating pump and a throttle valve.

The present embodiment further includes an oil return pipe 11 connected at an upper end thereof to the bottom side of the intake manifold 2 and adapted to lead out oil deposited in the intake manifold 2.

The lower end of the oil return pipe 11 may be connected to the exhaust pipe 8. In this case, the oil return pipe 11 is usually provided with a section of U-shaped pipe. As shown in fig. 1, the U-shaped pipe is used to ensure that the oil return pipe 11 is connected to a vertical pipe at the bottom side of the intake manifold 2, and the vertical pipe is always filled with lubricating oil to prevent the high-temperature and high-pressure refrigerant in the exhaust pipe 8 from entering the intake manifold 2 through the oil return pipe 11. In order to effectively prevent the high-temperature and high-pressure refrigerant in the exhaust pipe 8 from entering the intake manifold 2 through the oil return pipe 11, the oil return pipe 11 and the tail end preferably have an inclined section, and the included angle alpha formed by the trend of the oil return pipe 11 and the trend of the exhaust pipe 8 is an acute angle. The purpose of this design is to more effectively ensure that the oil phase entering the gas discharge pipe 8 is entrained by the high temperature and pressure refrigerant flowing into the oil separator 4. Preferably, 5 DEG-alpha.60 DEG, and more preferably, 5 DEG-alpha.30 deg.

The lower end of the oil return pipe 11 may also be connected to the oil separator 4 to discharge the derived oil phase into the oil separator 4. The scheme is not shown in the drawings. In this case, the oil return pipe 11 may have a straight-up and straight-down shape, or may have no U-shaped pipe.

Example two

With reference to fig. 1 and fig. 2, on the basis of the first embodiment, the present embodiment further includes an oil baffle plate 12 fixedly mounted in the intake manifold 2 through a bracket 13, where the oil baffle plate 12 is located on the opposite side of an intake port opened in the intake manifold 2 and used for connecting the condenser intake pipe 3.

EXAMPLE III

With reference to fig. 1 and 3, on the basis of the second embodiment, the present embodiment further includes an oil baffle 15 having a three-dimensional mesh structure and fixed on the oil baffle 12 by a fixing net 14. The oil baffle 15 with the three-dimensional net structure is generally a porous or multi-gap three-dimensional material, such as a steel wire ball.

Claims

1. An oil separating mechanism of a compressor refrigerating system, the compressor refrigerating system comprises a condenser, a compressor (6) and an oil separator (4), the condenser comprises a heat exchanger (1), an air inlet header (2) is connected to an air inlet end of the heat exchanger (1), the compressor (6) is connected with the oil separator (4) through an air outlet pipe (8), a gas phase outlet of the oil separator (4) is connected with the air inlet header (2) through a condenser air inlet pipe (3), and the oil separating mechanism is characterized in that: the oil separation mechanism comprises an oil return pipe (11) with the upper end connected with the bottom side of the air inlet manifold (2) and used for guiding out oil phase deposited in the air inlet manifold (2); the lower end of the oil return pipe (11) is connected with the exhaust pipe (8), or the lower end of the oil return pipe (11) is connected with the oil separator (4).

2. An oil separating mechanism for a compressor refrigeration system as set forth in claim 1 wherein: the oil separation mechanism also comprises an oil baffle plate (12) fixedly arranged in the air inlet header (2); the oil baffle plate (12) is positioned on the opposite side of an air inlet which is formed on the air inlet manifold (2) and is used for connecting the air inlet pipe (3) of the condenser.

3. An oil separating mechanism for a compressor refrigeration system as set forth in claim 2 wherein: the oil separation mechanism also comprises an oil baffle body (15) of a three-dimensional net structure fixed on the oil baffle plate (12).

4. An oil separating mechanism for a compressor refrigeration system as set forth in claim 3 wherein: the oil baffle body (15) with the three-dimensional net structure is a steel wire ball.

5. An oil separating mechanism for a compressor refrigeration system as claimed in claim 1, 2, 3 or 4, wherein: when the lower end of the oil return pipe (11) is connected with the exhaust pipe (8), an included angle alpha formed by the trend of the tail section of the oil return pipe (11) and the trend of the exhaust pipe (8) is an acute angle.

6. An oil separating mechanism for a compressor refrigeration system as set forth in claim 5 wherein: alpha is more than or equal to 5 degrees and less than or equal to 60 degrees.

7. An oil separating mechanism for a compressor refrigeration system as set forth in claim 6 wherein: alpha is more than or equal to 5 degrees and less than or equal to 30 degrees.