A new type of gas-liquid separator

Abstract

The utility model provides a novel gas-liquid separator, which relates to the field of gas-liquid separation technology, including a shell, a main air outlet pipe, an auxiliary air return pipe, a main air return pipe and an auxiliary hot gas bypass pipe, wherein the main air outlet pipe, the auxiliary air return pipe, the main air return pipe and the auxiliary hot gas bypass pipe are sequentially arranged on the shell; an air distribution grid is fixedly installed in the shell, and the air distribution grid divides the interior of the shell into two areas; the main air outlet pipe is located on one side of the air distribution grid, and the auxiliary air return pipe, the main air return pipe and the auxiliary hot gas bypass pipe are located on the other side of the air distribution grid. The utility model adds auxiliary inlet and outlet pipes for motor cooling return air and driver refrigerant return liquid, optimizes the system pipeline layout, saves a lot of space, and facilitates the assembly of the whole machine.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas-liquid separation, in particular to a novel gas-liquid separator. Background Art

[0002] The gas-liquid separator is one of the commonly used containers in air-cooled heat pump units. Its functions are to prevent a large amount of liquid refrigerant from returning to the compressor during the startup or defrosting process of the unit to cause liquid hammer, and to store a small amount of liquid refrigerant to prevent it from entering the compressor to dilute the lubricating oil, causing lubrication failure, and returning part of the lubricating oil through the oil return hole.

[0003] With the continuous development of central air conditioning and the increasing requirements for energy efficiency, variable frequency air-cooled scroll / screw heat pump units / variable frequency air-cooled centrifugal heat pump units are becoming more and more popular. For screw units / scroll units equipped with inverters, it is necessary to design a motor cooling circuit and a driver refrigerant cooling circuit, and the return air / liquid pipe is generally connected to the low-pressure suction pipe side. For variable frequency centrifugal units, it is necessary to set up an additional high-pressure to low-pressure hot gas bypass pipeline to ensure the rapid balance of the high and low pressure differences of the centrifugal unit to avoid surge.

[0004] The following problems exist in the prior art: 1. The above-mentioned return air, return liquid pipelines, hot gas bypass pipelines and some low-pressure sensors are all connected to the intake pipeline side, which will cause the intake side pipeline to be very long and occupy a large amount of space, which is not conducive to the assembly of the whole machine; 2. For conventional gas-liquid separators, although an oil return hole is set at the bottom of the return air pipe, the refrigerant airflow flowing inside the gas separator fluctuates greatly, resulting in a poor oil return effect at the bottom. Utility Model Content

[0005] In view of this, the utility model aims to provide a novel gas-liquid separator to solve the above technical problems.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A novel gas-liquid separator comprises a shell, a main gas outlet pipeline, an auxiliary gas return pipeline, a main gas return pipeline and an auxiliary hot gas bypass pipeline, wherein the main gas outlet pipeline, the auxiliary gas return pipeline, the main gas return pipeline and the auxiliary hot gas bypass pipeline are sequentially arranged on the shell;

[0008] An air equalizing grid is fixedly installed in the shell, and the air equalizing grid divides the interior of the shell into two areas; the main air outlet pipe is located on one side of the air equalizing grid, and the auxiliary air return pipe, the main air return pipe and the auxiliary hot air bypass pipe are located on the other side of the air equalizing grid.

[0009] Furthermore, the main gas outlet duct includes a first straight section, a second straight section and a U-shaped curved section, the first straight section passes through the top of the shell, a connecting flange is fixedly installed on the top of the first straight section; the first straight section and the bottom of the second straight section are connected by the curved section; the second straight section is entirely located inside the shell, and an inclined opening is formed on the top;

[0010] Two oil return holes are provided at the lower part of the curved section; an air baffle is installed in the curved section, and the air baffle is located above the oil return hole;

[0011] The first straight line segment is provided with a pressure relief hole for balancing the pipeline pressure.

[0012] Furthermore, the auxiliary air return duct is vertically fixed on the top of the shell, and a gas distribution seal cover is fixed on the bottom; a plurality of through holes are provided on the gas distribution seal cover.

[0013] Furthermore, the main air return duct is vertically arranged in the shell, and its top passes through the top of the shell; a connecting flange is fixedly installed on the top of the main air return duct; an inclined opening is formed at the bottom of the main air return duct, and a horizontal baffle is arranged at the bottom of the opening.

[0014] Furthermore, the auxiliary hot gas bypass pipeline is vertically arranged in the shell, and its top passes through the top of the shell; a connecting flange is fixedly installed on the top of the auxiliary hot gas bypass pipeline;

[0015] The auxiliary hot gas bypass pipeline is provided with a plurality of exhaust holes at a position located inside the shell, and the exhaust holes are evenly spaced in the vertical direction.

[0016] Furthermore, the shell includes a cylinder and a flat cover, and the flat covers are respectively fixed at both ends of the cylinder to ensure that a closed space is formed inside the shell.

[0017] Furthermore, sight glasses are installed at both ends of the shell for observing the state of the refrigerant inside.

[0018] Furthermore, a supporting baffle is fixedly installed inside the shell, and the two supporting baffles are separated by the thickness of an air distribution grid; the air distribution grid is clamped between the supporting baffles and fixed in the shell through the supporting baffles;

[0019] The support partition is provided with a plurality of fan-shaped openings for circulating the refrigerant, and the fan-shaped openings are evenly distributed along the circumferential direction.

[0020] Furthermore, it also includes lifting ears, and two of the lifting ears are fixedly mounted at diagonal positions on the top of the shell.

[0021] Furthermore, a supporting base is installed at the bottom of the shell.

[0022] Compared with the prior art, the novel gas-liquid separator described in the utility model has the following beneficial effects:

[0023] (1) The novel gas-liquid separator described in the utility model adds auxiliary inlet and outlet pipes for motor cooling return air and driver refrigerant return liquid, optimizes the system pipeline layout, saves a lot of space, and facilitates the assembly of the whole machine.

[0024] (2) In the novel gas-liquid separator described in the utility model, an exhaust hole is designed on the hot gas bypass pipe to ensure that the airflow enters the gas separation chamber evenly, and at the same time it can also achieve a certain silencing effect.

[0025] (3) The novel gas-liquid separator described in the utility model is internally provided with an air distribution grid and an air baffle to ensure uniform air flow inside the separator and stable and continuous oil return from the oil return hole at the bottom of the return air pipe, thereby improving separation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0027] Figure 1 It is a longitudinal sectional view of the utility model;

[0028] Figure 2 It is a top view of the utility model;

[0029] Figure 3 This is a schematic diagram of the structure of the main gas outlet pipeline of the utility model;

[0030] Figure 4 This is a schematic diagram of the structure of the main air return pipeline of the utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the auxiliary hot gas bypass pipeline of the utility model;

[0032] Figure 6 This is a schematic diagram of the structure of the support partition of the utility model;

[0033] Figure 7 It is a structural schematic diagram of the gas equalizing grid of the utility model.

[0034] Description of reference numerals:

[0035] 1- sight glass; 2- shell; 201- flat cover; 202- cylinder; 3- lifting ear; 4- main air outlet pipe; 401- oil return hole; 402- second straight section; 403- curved section; 404- first straight section; 405- pressure relief hole; 5- air distribution grid; 6- auxiliary air return pipe; 7- main air return pipe; 701- horizontal baffle; 8- auxiliary hot air bypass pipe; 801- exhaust hole; 9- air baffle; 10- support base; 11- support baffle; 1101- fan-shaped opening; 12- air distribution cover. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0037] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0039] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0040] The utility model provides a novel gas-liquid separator, comprising a shell 2, on which a main gas outlet pipe 4, an auxiliary gas return pipe 6, a main gas return pipe 7 and an auxiliary hot gas bypass pipe 8 are sequentially arranged. An air distribution grid 5 is installed in the shell 2, and the air distribution grid 5 divides the interior of the shell 2 into two left and right areas. The main gas outlet pipe 4 is located on one side of the air distribution grid 5, and the auxiliary gas return pipe 6, the main gas return pipe 7 and the auxiliary hot gas bypass pipe 8 are located on the other side of the air distribution grid 5. The air distribution grid 5 can achieve uniform distribution of the gas mixture, prevent the gas flow from being too concentrated or too sparse in certain areas, and thus improve the separation efficiency.

[0041] The main gas outlet pipeline 4 includes a first straight section 404, a second straight section 402 and a U-shaped curved section 403. The first straight section 404 runs through the top of the shell 2, and a connecting flange is fixed on the top of the first straight section 404. The first straight section 404 and the second straight section 402 are connected at the bottom through the curved section 403. The second straight section 402 is entirely located inside the shell 2, and an inclined opening is formed on its top for easy air intake. Two oil return holes 401 are provided at the lower part of the curved section 403, and an air baffle 9 is installed in the curved section 403. The air baffle 9 is located above the oil return hole 401. The gas and liquid in the main gas outlet pipeline are separated by the air baffle 9 to prevent the separated gaseous refrigerant from entering the liquid phase again, thereby ensuring stable and continuous oil return. The air baffle 9 is formed by cutting and drilling a steel plate. The first straight section 404, the curved section 403 and the second straight section 402 are fixed together by welding. A pressure relief hole 405 is provided on the first straight section 404 for balancing the pipeline pressure.

[0042] The auxiliary return air duct 6 is vertically welded to the top of the housing 2, and a uniform air seal cover 12 is fixed at its bottom. A plurality of through holes are provided on the uniform air seal cover 12 to facilitate silencing and uniform return air for motor cooling or return liquid for driver cooling. The uniform air seal cover 12 is made of sheet metal by bending, punching and welding.

[0043] The main return air duct 7 is vertically arranged in the housing 2, and its top passes through the top of the housing 2. A connecting flange is fixedly installed on the top of the main return air duct 7. The bottom of the main return air duct 7 is formed with an inclined opening, and a horizontal baffle 701 is arranged at the bottom of the opening. The gas is discharged from the opening, collides with the horizontal baffle 701, and then discharged to the right.

[0044] The auxiliary hot gas bypass pipe 8 is vertically arranged in the housing 2, and its top passes through the top of the housing 2. A connecting flange is fixedly installed on the top of the auxiliary hot gas bypass pipe 8. A plurality of exhaust holes 801 are formed in the part of the auxiliary hot gas bypass pipe 8 located inside the housing 2. The exhaust holes 801 are evenly spaced in the vertical direction to facilitate silencing and the discharge of hot gas bypass gas. The diameter of the exhaust holes 801 decreases from top to bottom.

[0045] The shell 2 includes a cylinder 202 and a pair of flat covers 201. The flat covers 201 are welded at both ends of the cylinder 202, so that the inside of the shell 2 is sealed into a closed space. The flat covers 201 on both sides of the cylinder 202 are installed with sight glasses 1, which are convenient for observing the refrigerant state inside the separator. A pair of lifting ears 3 are welded on the top of the cylinder 202. In order to avoid interference between the lifting ears 3 and the pipeline, the two lifting ears 3 are respectively arranged at the diagonal positions of the top of the cylinder 202. A support base 10 is fixed at the bottom of the cylinder 202. A nameplate is installed on the cylinder 202.

[0046] Furthermore, the air-distributing grid 5 is installed in the following manner: a pair of supporting baffles 11 are welded inside the housing 2, the two supporting baffles 11 are separated by the thickness of an air-distributing grid 5, and the air-distributing grid 5 is fixedly clamped between the supporting baffles 11. The supporting baffles 11 are provided with fan-shaped openings 1101 for the circulation of the refrigerant, and the fan-shaped openings 1101 are evenly distributed along the circumferential direction.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel gas-liquid separator, characterized in that: It comprises a shell, a main air outlet pipe, an auxiliary air return pipe, a main air return pipe and an auxiliary hot gas bypass pipe, wherein the main air outlet pipe, the auxiliary air return pipe, the main air return pipe and the auxiliary hot gas bypass pipe are sequentially arranged on the shell; An air equalizing grid is fixedly installed in the shell, and the air equalizing grid divides the interior of the shell into two areas; the main air outlet pipe is located on one side of the air equalizing grid, and the auxiliary air return pipe, the main air return pipe and the auxiliary hot air bypass pipe are located on the other side of the air equalizing grid.

2. The novel gas-liquid separator according to claim 1 is characterized in that: The main gas outlet duct includes a first straight section, a second straight section and a U-shaped curved section, the first straight section passes through the top of the shell, a connecting flange is fixedly installed on the top of the first straight section; the first straight section and the bottom of the second straight section are connected by the curved section; the second straight section is entirely located inside the shell, and an inclined opening is formed on the top; Two oil return holes are provided at the lower part of the curved section; an air baffle is installed in the curved section, and the air baffle is located above the oil return hole; The first straight line segment is provided with a pressure relief hole for balancing the pipeline pressure.

3. The novel gas-liquid separator according to claim 1 is characterized in that: The auxiliary air return duct is vertically fixed on the top of the shell, and a gas distribution seal cover is fixed on the bottom; a plurality of through holes are provided on the gas distribution seal cover.

4. The novel gas-liquid separator according to claim 1 is characterized in that: The main air return duct is vertically arranged in the shell, and its top passes through the top of the shell; a connecting flange is fixedly installed on the top of the main air return duct; an inclined opening is formed at the bottom of the main air return duct, and a horizontal baffle is arranged at the bottom of the opening.

5. The novel gas-liquid separator according to claim 1 is characterized in that: The auxiliary hot gas bypass pipeline is vertically arranged in the shell, and its top passes through the top of the shell; a connecting flange is fixedly installed on the top of the auxiliary hot gas bypass pipeline; The auxiliary hot gas bypass pipeline is provided with a plurality of exhaust holes at a position located inside the shell, and the exhaust holes are evenly spaced in the vertical direction.

6. The novel gas-liquid separator according to claim 1 is characterized in that: The shell comprises a cylinder and a flat cover, and the flat covers are respectively fixed at two ends of the cylinder to ensure that a closed space is formed inside the shell.

7. The novel gas-liquid separator according to claim 1 is characterized in that: Sight glasses are installed at both ends of the shell to observe the state of the refrigerant inside.

8. The novel gas-liquid separator according to claim 1 is characterized in that: The housing is fixed with supporting baffles, and the two supporting baffles are separated by the thickness of an air distribution grid; the air distribution grid is clamped between the supporting baffles and fixed in the housing through the supporting baffles; The support partition is provided with a plurality of fan-shaped openings for circulating the refrigerant, and the fan-shaped openings are evenly distributed along the circumferential direction.

9. The novel gas-liquid separator according to claim 1 is characterized in that: It also includes lifting ears, two of which are fixed at diagonal positions on the top of the shell.

10. The novel gas-liquid separator according to claim 1 is characterized in that: A supporting base is installed at the bottom of the shell.

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