CN110542251A

CN110542251A - Improved gas-liquid separator

Info

Publication number: CN110542251A
Application number: CN201910997771.5A
Authority: CN
Inventors: 许浩; 杨亚华; 易博; 傅玮
Original assignee: Nanjing TICA Climate Solutions Co Ltd
Current assignee: Nanjing TICA Climate Solutions Co Ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2019-12-06

Abstract

The invention relates to an improved gas-liquid separator, which comprises a shell, wherein an upper end cover of the shell is provided with an inlet pipe and an outlet pipe; the inlet pipe and the outlet pipe both extend into the upper part of the interior of the shell; a first oil return port and a second oil return port are respectively formed in the lower end cover of the shell and the lower part of the side wall; the first oil return port and the second oil return port are communicated to the outlet pipe through oil return pipes respectively; and the oil return pipe is provided with an electromagnetic valve capable of controlling the on-off of the pipeline. The invention has reasonable design, simple structure and convenient use, can realize active oil return, effectively meets the requirement of balanced oil return under the condition that a plurality of outdoor units are connected in parallel, and ensures the normal operation of the unit.

Description

Improved gas-liquid separator

Technical Field

The invention relates to an air conditioner component, in particular to a gas-liquid separator, and specifically relates to an improved gas-liquid separator.

Background

When the refrigerating system operates, lubricating oil is a necessary condition for ensuring the normal and reliable operation of the compressor, and when the system operates, the lubricating oil enters the pipeline along with the exhaust of the compressor and then returns to the gas-liquid separator after circulating flow. The gas-liquid separator mainly plays a role in separating gaseous refrigerants and liquid refrigerants, ensures that the refrigerants entering the compressor are the gaseous refrigerants, prevents liquid impact of the compressor, and meanwhile, the gas-liquid separator plays a role in returning lubricating oil to the compressor.

At present, an outlet pipe of a conventional gas-liquid separator is provided with an oil return hole, and lubricating oil can permeate into the outlet pipe and flow back to a compressor. However, the design is passive oil return, cannot be adjusted according to the requirements of the unit, and is difficult to meet the requirements of modern air conditioning units. Especially, when a plurality of outdoor units are connected in parallel, the problem of uneven oil return is easily caused, and the normal influence of the unit is influenced.

Disclosure of Invention

The invention aims to provide an improved gas-liquid separator aiming at the defects of the prior art, which can realize active oil return, effectively meet the requirement of balanced oil return under the condition that a plurality of outdoor units are connected in parallel and ensure the normal operation of a unit.

The technical scheme of the invention is as follows:

An improved gas-liquid separator comprises a shell, wherein an upper end cover of the shell is provided with an inlet pipe and an outlet pipe; the inlet pipe and the outlet pipe both extend into the upper part of the interior of the shell; a first oil return port and a second oil return port are respectively formed in the lower end cover of the shell and the lower part of the side wall; the first oil return port and the second oil return port are communicated to the outlet pipe through oil return pipes respectively; and the oil return pipe is provided with an electromagnetic valve capable of controlling the on-off of the pipeline.

Furthermore, the solenoid valve is one, and is arranged at the joint of the oil return pipe and the outlet pipe.

furthermore, the number of the electromagnetic valves is two, and the two electromagnetic valves are respectively arranged at the joint of the oil return pipe and the first oil return port or the second oil return port.

Further, the first oil return port is located at the lowest point of the lower end cover; the volume of the shell below the second oil return port is equivalent to the theoretical lubricating oil amount of the single outdoor unit.

The invention has the beneficial effects that:

The invention has reasonable design, simple structure and convenient use, can realize active oil return, effectively meets the requirement of balanced oil return under the condition that a plurality of outdoor units are connected in parallel, and ensures the normal operation of the unit.

Drawings

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

Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.

Wherein: 1-a shell; 2-pipe feeding; 3, discharging a pipe; 4-an oil return pipe; 5-an electromagnetic valve; 6-a second oil return port; 7-a first oil return port; 8-electromagnetic valve I; 9-solenoid valve II.

Detailed Description

the invention is further described below with reference to the figures and examples.

Embodiment one, as shown in fig. 1.

An improved gas-liquid separator comprises a housing 1. The shell 1 can be cylindrical, and the upper end cover and the lower end cover of the shell are both arc-shaped. An inlet pipe 2 and an outlet pipe 3 are arranged on the upper end cover. The inlet pipe 2 and the outlet pipe 3 both extend into the upper part inside the shell 1, and the part inside the shell 1 is in a straight pipe shape, so that the production is convenient, and the cost is reduced. Meanwhile, the inlet pipe 2 and the outlet pipe 3 are respectively connected with a four-way valve of an air conditioning unit and a compressor air suction port, so that the refrigerant mixed with gas and liquid in the unit can flow into the shell 1 through the inlet pipe 2, and after separation, the gas refrigerant flows out through the outlet pipe 3 and then flows back to the compressor for circulation. A first oil return port 7 and a second oil return port 6 are respectively arranged at the lower end cover and the lower part of the side wall of the shell 1; the first oil return port 7 and the second oil return port 6 are communicated to the outlet pipe 3 through the oil return pipe 4 respectively, so that separated lubricating oil can flow into the outlet pipe 3 through the oil return pipe 4 and then flow back to the compressor, and the operation requirement of the compressor is guaranteed. Preferably, two oil return pipes connected with the first oil return port 7 and the second oil return port 6 are connected in parallel, and then connected to the outlet pipe 3, and a solenoid valve 5 is arranged at the connection position of the two oil return pipes and the outlet pipe 3. The electromagnetic valve 5 can control the on-off of the oil return pipe 4, so that the oil return amount can be actively controlled according to the running condition of the unit, and the oil return requirement of the compressor can be better met.

Further, the first oil return port 7 is located at the lowest point of the lower end cover, so that the collected lubricating oil can be discharged. The second oil return port 6 is higher than the first oil return port 7, the volume of the casing 1 below the second oil return port is equal to the theoretical lubricating oil amount of a single outdoor unit, and the maximum oil storage amount in the casing 1 is ensured not to exceed the lubricating oil amount of the single outdoor unit, so that the lubricating oil can be prevented from being retained in one outdoor unit when the outdoor units are connected in parallel and more than two outdoor units are connected in parallel.

Preferably, the solenoid valve 5 may be a normally open type solenoid valve. Simultaneously for preventing that lubricating oil gets into the speed of compressor too fast, lead to compressor liquid impact, the aperture of solenoid valve 5 is 1mm ~3mm, specifically according to the experimental test decision. And during normal control, the electromagnetic valve is normally opened, and when the condition that the exhaust superheat degree of the compressor is low is detected, the electromagnetic valve is closed.

Example two, as shown in fig. 2. The structure of this embodiment is substantially the same as that of the first embodiment, and the main difference is that: this embodiment includes two solenoid valves: solenoid valve I8 and solenoid valve II 9. The electromagnetic valve I8 is disposed at a connection between the oil return pipe 4 and the first oil return port 7. The electromagnetic valve II9 is arranged at the joint of the oil return pipe 4 and the second oil return opening 6. By respectively controlling the two electromagnetic valves, the active oil return control can be more convenient and accurate.

Preferably, the solenoid valve I8 can be a normally open solenoid valve, the solenoid valve II9 is a normally closed solenoid valve, and the aperture of each of the two solenoid valves is 1 mm-3 mm. When the oil return valve is used, the electromagnetic valve I8 is normally open, and the electromagnetic valve II9 is normally closed, so that normal oil return is ensured. When detecting that the discharge superheat degree of the compressor is low, the solenoid valve I8 can be closed, and the oil return amount is reduced. When the superheat degree of the exhaust gas of the compressor is detected to be overhigh, the electromagnetic valve II9 can be opened, and the oil return quantity of the compressor is increased. And for the unit with a plurality of outdoor units connected in parallel, oil equalizing logic can be set, namely, the oil return electromagnetic valves II of the outdoor units are opened in turn to discharge redundant lubricating oil in the gas-liquid separator.

The parts not involved in the present invention are the same as or can be implemented using the prior art.

Claims

1. An improved gas-liquid separator comprising a housing, characterized by: an inlet pipe and an outlet pipe are arranged on the upper end cover of the shell; the inlet pipe and the outlet pipe both extend into the upper part of the interior of the shell; a first oil return port and a second oil return port are respectively formed in the lower end cover of the shell and the lower part of the side wall; the first oil return port and the second oil return port are communicated to the outlet pipe through oil return pipes respectively; and the oil return pipe is provided with an electromagnetic valve capable of controlling the on-off of the pipeline.

2. The improved gas-liquid separator as defined in claim 1 wherein: the electromagnetic valve is one and is arranged at the joint of the oil return pipe and the outlet pipe.

3. The improved gas-liquid separator as defined in claim 1 wherein: the two electromagnetic valves are respectively arranged at the joint of the oil return pipe and the first oil return port or the second oil return port.

4. The improved gas-liquid separator as defined in claim 1 wherein: the first oil return port is positioned at the lowest point of the lower end cover; the volume of the shell below the second oil return port is equivalent to the theoretical lubricating oil amount of the single outdoor unit.