CN216114784U

CN216114784U - Energy-saving and efficient exhaust oil return pipe of parallel unit

Info

Publication number: CN216114784U
Application number: CN202122436328.6U
Authority: CN
Inventors: 王海英; 朱文三; 翁开荣; 吕世栋; 宋玉斌; 雷海生; 路川波; 姜伟涛
Original assignee: Shandong Fengshun Refrigeration And Air Conditioning Co ltd
Current assignee: Shandong Fengshun Refrigeration Technology Group Co ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2022-03-22
Anticipated expiration: 2031-10-11

Abstract

The utility model relates to an energy-saving and efficient exhaust oil return pipe of a parallel unit, which comprises a plurality of semi-closed screw compressors and an exhaust collecting pipe connected with the semi-closed screw compressors, wherein the exhaust collecting pipe is respectively connected with a first exhaust oil return branch pipe, a second exhaust oil return branch pipe and a third exhaust oil return branch pipe, the other ends of the first exhaust oil return branch pipe, the second exhaust oil return branch pipe and the third exhaust oil return branch pipe are respectively connected with an air inlet pipe of an oil separator, and the air inlet pipe of the oil separator is connected with the oil separator. The energy-saving and efficient parallel unit exhaust oil return pipe solves the problems that an exhaust collecting pipe is low, an air inlet of an oil separator is higher, oil is accumulated well by direct pipeline and elbow connection, and unit oil cannot return. Compared with the prior parallel screw unit, the parallel screw unit is compact, saves space and sectional materials such as section steel, pipelines and the like, has simple and convenient installation, and improves the stability, quality, safety and other properties of the unit.

Description

Energy-saving and efficient exhaust oil return pipe of parallel unit

Technical Field

The utility model belongs to the freezing and refrigerating technology, and particularly relates to an energy-saving and efficient exhaust oil return pipe of a parallel unit.

Background

At present, with the more and more obvious advantages of parallel units, the number of the parallel units is gradually increased from 2-3 original small parallel units to 5-6 parallel units, the number of compressors is increased, the bearing capacity of section steel is large, liquid accumulators of the parallel units and the like are required to be independently placed, the frame of the compressor unit is shorter in consideration of the factors of bearing, stability, safety and the like, however, the oil separator of a manufacturer is enlarged in diameter and higher in height along with the increase of the number of the compressors, the existing difficulty in the industry is that an exhaust manifold is low, an air inlet of the oil separator is higher, the oil separator is directly connected through a pipe inner elbow in the prior art, and the existing parallel units accumulate much oil in the exhaust pipe to cause the abnormal temperature reduction of the units.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems and provides an energy-saving and efficient exhaust oil return pipe of a parallel unit.

In order to achieve the purpose, the utility model provides an energy-saving and efficient parallel unit exhaust oil return pipe which comprises a plurality of semi-closed screw compressors and an exhaust collecting pipe connected with the semi-closed screw compressors, wherein the exhaust collecting pipe is respectively connected with a first exhaust oil return branch pipe, a second exhaust oil return branch pipe and a third exhaust oil return branch pipe, the other ends of the first exhaust oil return branch pipe, the second exhaust oil return branch pipe and the third exhaust oil return branch pipe are respectively connected with an oil separator air inlet pipe, and the oil separator air inlet pipe is connected with an oil separator.

The energy-saving and efficient parallel unit exhaust oil return pipe solves the problems that an exhaust collecting pipe is low, an air inlet of an oil separator is higher, oil is accumulated well by direct pipeline and elbow connection, and unit oil cannot return. Compared with the prior parallel screw unit, the parallel screw unit is compact, saves space and sectional materials such as section steel, pipelines and the like, has simple and convenient installation, and improves the stability, quality, safety and other properties of the unit.

Drawings

FIG. 1 schematically illustrates a side view of an energy efficient parallel unit exhaust gas return pipe according to one embodiment of the present invention;

fig. 2 is a perspective view schematically illustrating an energy-saving and efficient parallel unit exhaust return pipe according to an embodiment of the present invention.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the utility model, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

In describing embodiments of the present invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship that is based on the orientation or positional relationship shown in the associated drawings, which is for convenience and simplicity of description only, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, the above-described terms should not be construed as limiting the present invention.

The present invention is described in detail below with reference to the drawings and the specific embodiments, which are not repeated herein, but the embodiments of the present invention are not limited to the following embodiments.

Referring to fig. 1 and 2, the utility model provides an energy-saving and efficient parallel unit exhaust oil return pipe, which comprises a plurality of semi-closed screw compressors 1 and an exhaust manifold 2 connected with the semi-closed screw compressors 1, wherein the exhaust manifold 2 is respectively connected with a first exhaust oil return branch pipe 3, a second exhaust oil return branch pipe 4 and a third exhaust oil return branch pipe 5, the other ends of the first exhaust oil return branch pipe 3, the second exhaust oil return branch pipe 4 and the third exhaust oil return branch pipe 5 are respectively connected with an oil separator air inlet pipe 6, and the oil separator air inlet pipe 6 is connected with an oil separator 7.

The utility model provides an energy-saving and efficient working process and a design principle of an exhaust oil return pipe of a parallel unit, which are as follows: refrigerant R507 is pressurized and exhausted to an exhaust header 2 through a semi-closed screw compressor 1, the refrigerant is gathered to an air inlet pipe 6 of an oil separator through a first exhaust oil return branch pipe 3, a second exhaust oil return branch pipe 4 and a third exhaust oil return branch pipe 5, high-temperature and high-pressure gas of the refrigerant R507 enters the oil separator 7, the exhaust gas of the oil separator 7 enters a condenser, a high-pressure storage and throttle expansion valve and an evaporator and then is returned and sucked by the semi-closed screw compressor 1, closed circulation is formed, and the processes are repeated.

The design is based on the principle that Freon and oil are mutually soluble, the first exhaust oil return branch pipe 3, the second exhaust oil return branch pipe 4 and the third exhaust oil return branch pipe 5 are all opened at the bottom of the exhaust manifold 2, oil in the manifold is taken to an oil separator air inlet pipe 6 according to the load of a compressor along with the exhaust airflow and the flow speed, the design principle has the advantages that the small-caliber large-flow-speed oil carrying effect is good, the exhaust manifold is D159 4.5, the first exhaust oil return branch pipe 3, the second exhaust oil return branch pipe 4 and the third exhaust oil return branch pipe 5 are designed into the calibers D76 4.0, D89 4.0 and D108 4.0, and the design principle has the advantages that an oil return bend is arranged, the lowest point of the oil return bend is accumulated, an oil seal is formed, and the exhaust pushes the oil inlet separator.

The energy-saving and high-efficiency exhaust oil return pipe of the parallel unit has the following advantages:

1) the problems that the exhaust manifold is low, the oil separator has a high air inlet, a direct pipeline and an elbow are connected, much oil is accumulated, and the unit oil cannot return are solved.

2) The small-caliber large-flow-rate oil carrying effect is good, the exhaust header is D159 x 4.5, the calibers of the first exhaust oil return branch pipe 3, the second exhaust oil return branch pipe 4 and the third exhaust oil return branch pipe 5 are designed into D76 x 4.0, D89 x 4.0 and D108 x 4.0, oil can be returned by different calibers according to the load and the flow rate of the compressor, the first exhaust oil return branch pipe 3 is used for returning oil when the general load is less, the second exhaust oil return branch pipe 4 is used when the load is 50 percent, the first exhaust oil return branch pipe 3, the second exhaust oil return branch pipe 4 and the third exhaust oil return branch pipe 5 can be selected to return oil simultaneously when the full-load operation is carried out, and an oil return path can be selected according to the load, so that the efficient and energy-saving operation of the refrigeration system is realized.

3) Compared with the prior parallel screw unit, the parallel screw unit is compact, saves space and sectional materials such as section steel, pipelines and the like, has simple and convenient installation, and improves the stability, quality, safety and other properties of the unit.

The above description is only one embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an energy-conserving efficient parallel unit exhaust oil return pipe, its characterized in that, including many semi-closed screw compressor (1), with exhaust header (2) that semi-closed screw compressor (1) are connected, be connected with first exhaust oil return branch pipe (3), second exhaust oil return branch pipe (4) and third exhaust oil return branch pipe (5) on exhaust header (2) respectively, the other end of first exhaust oil return branch pipe (3), second exhaust oil return branch pipe (4) and third exhaust oil return branch pipe (5) is connected with oil separator intake pipe (6) respectively, oil separator intake pipe (6) are connected on oil separator (7).