CN213514491U - Compressor exhaust structure and refrigeration plant - Google Patents

Abstract

The utility model discloses a compressor exhaust structure and refrigeration equipment, wherein the refrigeration equipment comprises a compressor exhaust structure; the exhaust structure includes an oil separator including: at least two air inlets formed at an upper end of the oil separator; an exhaust port formed at a bottom of the oil separator; the compressor discharge structure further includes: and the number of the exhaust branch pipelines is consistent with that of the air inlets, one end of each exhaust branch pipeline is communicated with one air inlet, and the other end of each exhaust branch pipeline is communicated with the air outlet of the compressor. Use the utility model discloses, can reduce the exhaust pressure loss when improving oil content efficiency, improve the refrigerating system performance.

Description

Compressor exhaust structure and refrigeration plant

Technical Field

The utility model belongs to the technical field of refrigeration plant, specifically speaking relates to a compressor exhaust structure and have this exhaust structure's refrigeration plant.

Background

In refrigeration equipment such as a water chiller, when a compressor is operated, a refrigerant in the compressor is mixed with lubricating oil, and a part of the lubricating oil is inevitably carried in the refrigerant discharged from the compressor, so that the lubricating oil in the compressor is reduced. In order to avoid the problem that the compressor affects the safe and efficient operation of the refrigeration system due to lack of lubricating oil, an oil separator is arranged between the compressor and the condenser, mixed gas of the refrigerant and the lubricating oil reaches the oil separator through a gas exhaust pipeline, the refrigerant and the lubricating oil are separated under the action of the oil separator, and the separated lubricating oil is led back to the compressor.

In the prior art, an air inlet and an air outlet are respectively arranged at the upper end of an oil separator, the air inlet of the oil separator is communicated with the air outlet of a compressor through a pipeline, and the air outlet of the oil separator is communicated with the inlet of a condenser through a pipeline to form an air exhaust structure of the compressor.

With the compressor discharge structure of the above structure, since the oil separator has only one air inlet, the mixed gas of the refrigerant and the lubricating oil enters the oil separator at a high pressure and a high speed, so that a large amount of mixed gas cannot be sufficiently separated in a limited space of the oil separator, the oil separation efficiency is low, and the lubricating oil introduced back to the compressor is limited. The mixed gas with higher speed flows in the pipeline and the oil separator, and the on-way resistance loss is large, so that the exhaust pressure loss of the compressor is overlarge, and the capacity and the energy efficiency of the refrigerating system are reduced. Moreover, because the exhaust port is arranged at the upper end of the oil separator, the pipeline between the oil separator and the condenser is long due to the design position limitation of the compressor and the condenser. Longer piping also results in excessive discharge pressure losses, which exacerbates the reduction in energy efficiency of the refrigeration system.

Disclosure of Invention

The utility model aims at providing a compressor exhaust structure reduces the exhaust pressure loss when improving oil content efficiency, improves the refrigerating system performance.

In order to solve the technical problem, the utility model discloses a following technical scheme realizes:

a compressor discharge structure comprising an oil separator, the oil separator comprising:

at least two air inlets formed at an upper end of the oil separator;

an exhaust port formed at a bottom of the oil separator;

the compressor discharge structure further includes:

and the number of the exhaust branch pipelines is consistent with that of the air inlets, one end of each exhaust branch pipeline is communicated with one air inlet, and the other end of each exhaust branch pipeline is communicated with the air outlet of the compressor.

The compressor discharge structure as described above, further comprising:

one end of the first main straight pipe section is communicated with an air outlet of the compressor, and the other end of the first main straight pipe section is communicated with the exhaust branch pipeline;

a distribution portion formed in a region where the other end of the first total straight pipe section communicates with the exhaust branch pipe, for distributing the gas from the first total straight pipe section into the exhaust branch pipe.

According to the exhaust structure of the compressor, the exhaust branch pipeline comprises a branch pipe bent pipe section and a branch pipe straight pipe section, and the branch pipe straight pipe section is parallel to the first main straight pipe section.

Preferably, the branch pipe bent pipe section and the branch pipe straight pipe section are of an integrally formed structure.

Preferably, the heights of the plurality of air inlets on the oil separator are the same, and the plurality of exhaust branch pipes are located on the same plane.

The compressor discharge structure as described above, further comprising:

one end of the second main straight pipe section is communicated with the exhaust port of the oil separator, and the other end of the second main straight pipe section is communicated with the condenser;

the second total straight pipe section is perpendicular to the plane of the exhaust branch pipe.

In the above exhaust structure of the compressor, the oil separator includes an outer cylinder, the outer cylinder forms an inner cavity of the outer cylinder, and the air inlet and the air outlet are both formed on the outer cylinder; be formed with exhaust passage in the outer barrel inner chamber, exhaust passage includes certainly the first exhaust pipe of the top downwardly extending of outer barrel and certainly the gas vent to the second exhaust pipe of the lower extreme opening extension of first exhaust pipe, the second exhaust pipe stretches into first exhaust pipe.

In the above exhaust structure of the compressor, a separation part is further formed in the inner cavity of the outer cylinder, and the separation part is located below the first exhaust cylinder and arranged around the second exhaust cylinder.

Preferably, the separation part has a tapered structure.

The utility model also provides a refrigeration plant with compressor exhaust structure, this refrigeration plant exhaust pressure loss is little, and the refrigeration efficiency is high.

Compared with the prior art, the utility model discloses an advantage is with positive effect: in the exhaust structure of the compressor provided by the utility model, the oil separator is provided with a plurality of air inlets, and each air inlet is communicated with the air outlet of the compressor through an exhaust branch pipeline; input compressor gas outlet combustion gas to oil separator through a plurality of air inlets through multichannel exhaust branch pipeline, on the one hand, the structure that utilizes multichannel exhaust branch pipeline and compressor gas outlet to be connected reduces the gas flow rate, reduce the exhaust pressure loss, improve refrigeration performance's efficiency, on the other hand, the gas after the velocity of flow reduces gets into oil separator through a plurality of air inlets, can make full use of the inside oil content structure of oil separator carry out abundant effectual oil-gas separation, oil content efficiency has been improved, the compressor volume of returning oil has been increased, refrigeration system's safe high-efficient operation has been improved, thereby refrigeration system's wholeness ability is improved.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when read in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic top view of an embodiment of a compressor discharge structure according to the present invention;

FIG. 2 is a perspective view of a portion of the structure of FIG. 1;

fig. 3 is a schematic view of the internal structure of the oil separator of fig. 1.

In the above figures, the reference numerals and their corresponding part names are as follows:

1. a compressor; 11. an air outlet;

2. an oil separator; 21. a first air inlet; 22. a second air inlet; 23. an exhaust port; 24. an outer cylinder; 251. a first exhaust cylinder; 252. a second exhaust funnel; 26. a separation section; 27. a liquid viewing mirror;

3. a first exhaust branch line; 31. branch pipe bending sections; 32. a branch pipe straight pipe section;

4. a second exhaust branch line; 41. a first leg bend section; 42. a first leg straight tube section; 43. a second branch pipe bend section; 44. a second branch straight pipe section;

5. a first substantially straight tube section;

6. a distribution section;

7. a second generally straight tube section;

8. and (4) a flange.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "lateral", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Fig. 1 to 3 show an embodiment of a compressor discharge structure according to the present invention, specifically a compressor discharge structure applied to a water chiller. Fig. 1 is a schematic top view of the oil separator of this embodiment, fig. 2 is a schematic perspective view of a part of the oil separator of fig. 1, and fig. 3 is a schematic internal structure of the oil separator of fig. 1.

In this embodiment, the chiller is a screw chiller, which includes a screw compressor 1, a condenser, an evaporator, an expansion valve (not shown in the figure), and these components are connected by a pipeline to form a refrigeration system, so as to realize the refrigeration and heating effects of the chiller.

When the refrigeration system is operated, the refrigerant in the compressor 1 is discharged from the gas outlet 11 of the compressor, and flows into the condenser through the gas discharge structure for heat exchange. Because the refrigerant discharged from the gas outlet 11 carries lubricating oil, the exhaust structure between the compressor 1 and the condenser comprises an oil separator 2 for separating oil from gas of the mixture discharged from the compressor, the separated gaseous refrigerant flows into the condenser, and the separated lubricating oil is introduced back to the compressor 1.

Specifically to this embodiment, referring to fig. 1, 2 and 3, the oil separator 2 has two air inlets, which are a first air inlet 21 and a second air inlet 22, both of which are formed at an upper end portion of the oil separator 2, and the two air inlets are provided at intervals. Preferably, the spacing distance between the two air inlets is as large as possible, so that on one hand, mutual interference of two paths of air inlets can be avoided, and on the other hand, the internal space of the oil separator can be fully utilized, so that gas can be uniformly and fully subjected to oil-gas separation. For example, for an oil separator having a cylindrical outer shape, the two inlets are located at opposite ends of the diameter of the circular cross-section. An exhaust port 23 is formed in the bottom of the oil separator 2 to discharge the refrigerant separated by the oil separator 2 to the condenser.

The exhaust structure of this embodiment is adapted to the structure of the oil separator 2 having two air inlets, and includes two exhaust branch pipes, i.e., a first exhaust branch pipe 3 and a second exhaust branch pipe 4, for conveying the mixed gas discharged from the compressor 1 to the oil separator 2. One end of the first exhaust branch pipeline 3 is communicated with the first air inlet 21, and the other end is communicated with the air outlet 11 of the compressor 1; the second exhaust branch pipe 4 has one end communicating with the second inlet port 22 and the other end communicating with the outlet port 11 of the compressor 1.

In this embodiment, the oil separator 2 is provided with two air inlets, and each air inlet is communicated with the compressor air outlet through one exhaust branch pipeline, so that the purpose of inputting the gas exhausted from the compressor air outlet to the oil separator through a plurality of air inlets through a plurality of exhaust branch pipelines is achieved. By the structural design, on one hand, the gas flow rate is reduced by utilizing the structure that the multi-path exhaust branch pipeline is connected with the air outlet of the compressor, the exhaust pressure loss is reduced, and the energy efficiency of the refrigeration performance is improved; on the other hand, the gas after the velocity of flow reduces gets into oil separator through a plurality of air inlets, can make full use of the inside oil content structure of oil separator carry out abundant effectual oil-gas separation, improved oil content efficiency, increased the compressor volume of returning oil, improved refrigerating system's safe high-efficient operation to improve refrigerating system's wholeness ability.

The air inlets of the oil separator are not limited to two in this embodiment, and the exhaust branch pipe is not limited to two in this embodiment. In other embodiments, the number of the air inlets of the oil separator may be more, and correspondingly, the number of the exhaust branch pipes is the same as that of the air inlets, so that each air inlet is communicated with the air outlet of the compressor through a separate exhaust branch pipe. Be greater than two oil separator's air inlet and be more than the structure of the exhaust branch pipe way of two tunnel, also belong to the utility model discloses a protection category.

In order to facilitate the connection between the exhaust branch pipeline and the compressor 1, the exhaust structure of the compressor of this embodiment further includes a first main straight pipe section 5, one end of which is communicated with the air outlet 11 of the compressor 1, and the other end of which is communicated with the first exhaust branch pipeline 3 and the second exhaust branch pipeline 4, respectively.

In order to realize the communication between each exhaust branch pipeline and the air inlet of the first main straight pipe section 5 and the oil separator 2, the conventional arrangement positions of the compressor 1, the oil separator 2 and the condenser in the water chilling unit are combined, and in the embodiment, the first exhaust branch pipeline 3 and the second exhaust branch pipeline 4 adopt a structure that a branch pipe bent pipe section is combined with a branch pipe straight pipe section.

Specifically, the first air inlet 21 is an air inlet close to the compressor 1 in the oil separator 2, and correspondingly, the first exhaust branch pipeline 3 includes a branch pipe bent section 31 and a branch pipe straight section 32, one end of the branch pipe bent section 31 is connected with the first main straight section 5, and one end of the branch pipe straight section 32 is connected with the first air inlet 21. The branch pipe bent pipe section 31 and the branch pipe straight pipe section 32 are integrally formed, so that the roughness of the pipeline is reduced, the on-way resistance coefficient is reduced, and the exhaust pressure loss is reduced. Furthermore, the bending angle of the branch pipe bent section 31 is preferably 90 °, and the branch pipe straight section 32 and the first straight main section 5 are parallel to each other. So set up first exhaust branch pipeline 3, can be so that gas in the as far as possible steady state of flow in-process, avoid leading to gas and pipeline inner wall collision because of the pipeline undulates, reduce the friction of gas and pipeline inner wall, reduce the exhaust pressure loss.

And the second air inlet 22 is an air inlet far from the compressor 1 in the oil separator 2, correspondingly, the second exhaust branch pipeline 4 comprises a first branch bent pipe section 41, a first branch straight pipe section 42, a second branch bent pipe section 43 and a second branch straight pipe section 44, one end of the first branch bent pipe section 41 is connected with the first main straight pipe section 5, and one end of the second branch straight pipe section 44 is connected with the second air inlet 22. And the four pipe sections are of an integrally formed structure so as to reduce the roughness of the pipeline, reduce the on-way resistance coefficient and reduce the exhaust pressure loss. Wherein the bending angle of the first branch pipe bent section 41 is preferably 90 degrees, the bending angle of the second branch pipe bent section 43 is preferably 180 degrees, and the first branch pipe straight section 42 and the second branch pipe straight section 44 are both parallel to the first main straight section 5. So set up second exhaust branch pipeline 3, can be so that gas in the as far as possible steady state of flow in-process, avoid leading to gas and pipeline inner wall collision because of the pipeline undulates, reduce the friction of gas and pipeline inner wall, reduce the exhaust pressure loss.

To further maintain the stability of the gas flow, the first and second gas inlets 21 and 22 are at the same height above the oil separator 2, and the first and second exhaust branch pipes 3 and 4 are located on the same plane, as shown in fig. 2.

The first main straight pipe section 5 needs to be communicated with two exhaust branch pipes, and in order to improve the uniformity of gas flow, the exhaust structure of the embodiment further includes a distribution portion 6 formed in a region where the first main straight pipe section 5 is communicated with the exhaust branch pipes, for distributing the gas from the first main straight pipe section into the first exhaust branch pipe 3 and the second exhaust branch pipe 4. Moreover, the distribution part can prevent the gas exhausted from the first main straight pipe section 5 from directly colliding with the pipe wall to cause pressure loss. In a preferred embodiment, the distributing part 6 is formed by combining two metal plates into a whole, the bottom of the distributing part 6 is fixedly welded inside the pipeline, and two distributing surfaces of the distributing part 6 in the pipeline are respectively tangent to the inner wall surfaces of the branch pipe bent section 31 and the first branch pipe bent section 41. So set up, can make gas contact as far as possible distribution portion 6 and the welded part of pipeline, reduce the friction of gas and pipeline, be favorable to reducing the exhaust pressure loss.

The exhaust structure of the compressor of the embodiment further comprises a second straight pipe section 7, one end of which is communicated with the exhaust port 23 of the oil separator 2, and the other end of which is communicated with the condenser through a flange 8. Because the exhaust port 23 of the oil separator 2 is arranged at the bottom, the oil separator can be directly communicated with the condenser only through one path of the second straight pipe section 7 without using an elbow, the length of the pipeline is reduced, and the exhaust pressure loss is further reduced. Moreover, the second straight main pipe section 7 is preferably perpendicular to the plane of the two exhaust branch pipes, and can also play a role in keeping the stable flow of gas, which is beneficial to further reducing the exhaust pressure loss.

The oil separator 2 of the present embodiment is configured to have an upper intake and a bottom exhaust, and to smoothly discharge the gas refrigerant after oil-gas separation from the bottom exhaust port 23, the oil separator 2 of the present embodiment is configured as follows:

the oil separator 2 includes an outer cylinder 24, the outer cylinder 24 forms an outer cylinder inner cavity, the first air inlet 21, the second air inlet 22 and the air outlet 23 are all formed on the outer cylinder, and preferably, the outer cylinder 24 is a cylindrical cylinder with a cavity formed inside. Specifically, the first and second intake ports 21 and 22 are formed on the side wall of the upper end portion of the outer cylinder 24, and the exhaust port 23 is formed on the bottom wall of the outer cylinder 1. An oil discharge port (not shown) is formed at the lower end of the outer cylinder 24, and the oil discharge port is communicated with a compressor oil return port through an oil discharge pipeline (not shown) so as to input the lubricating oil separated by the oil separator 2 into the compressor 1, thereby realizing the oil return of the compressor. An oil drain valve (not shown) may be further provided on the oil drain line to control whether or not the lubricating oil in the oil separator 2 is drained. A liquid level observation mirror 27 for observing the level of the lubricating oil inside the outer cylinder 1 is formed at the lower end portion of the outer cylinder 24.

An exhaust passage is formed in the inner cavity of the outer cylinder and includes a first exhaust cylinder 251 and a second exhaust cylinder 252. Wherein, the first gas discharging cylinder 251 extends downwards from the top of the outer cylinder 24, and the lower end thereof forms an opening, and the height of the opening is lower than the first gas inlet 21 and the second gas inlet 22; and the second exhaust cylinder 252 extends from the exhaust port 23 toward the lower end opening of the first exhaust cylinder 251 and partially into the first exhaust cylinder 251 with its upper end open. The first discharge tube 251 has a larger diameter than the second discharge tube 252, and a passage through which a gaseous refrigerant flows is formed at a portion where the two discharge tubes overlap.

In order to improve the oil-gas separation efficiency, a separation part 26 is further formed in the inner cavity of the outer cylinder, and the separation part 26 is located below the first exhaust cylinder 251 and arranged around the second exhaust cylinder 252. In a preferred embodiment, the separation portion 26 has a conical structure, so that the oil-gas separation effect is improved, and the liquid lubricating oil can flow to the bottom of the outer cylinder 24 smoothly under the guidance of the conical structure.

The mixed gas discharged from the gas outlet 11 of the compressor 1 flows into the oil separator 2 through the first gas discharge branch pipe 3 and the first gas inlet 21, and flows into the oil separator 2 through the second gas discharge branch pipe 4 and the second gas inlet 22. The two paths of mixed gas are mixed in the inner cavity of the outer cylinder body, and collide with the inner wall of the outer cylinder body 24, the side wall of the first exhaust cylinder 251, the side wall of the second exhaust cylinder 252 and the surface of the separation part 26 in the flowing process, and the liquid lubricating oil flows to the bottom along the inner wall, the side wall and the surface of the separation part 26 under the action of gravity in the colliding process. And the lighter gaseous refrigerant enters the exhaust channel under the action of high pressure, is finally discharged through the second exhaust barrel 252 and the exhaust port 23 and enters the condenser, so that the oil-gas separation is realized. Through adopting the structure that first discharge tube 251 and second discharge tube 252 overlap the grafting to constitute exhaust passage, combine the setting of separation portion 26, can realize efficient oil-gas separation with simple structure, improved oil-gas separation efficiency, can also realize oil-gas separation with resistance as far as possible, avoid the refrigerant pressure loss that the oil content in-process caused.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or that equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention, which is claimed.

Claims (10)

1. A compressor discharge structure comprising an oil separator, characterized in that the oil separator comprises:

at least two air inlets formed at an upper end of the oil separator;

an exhaust port formed at a bottom of the oil separator;

the compressor discharge structure further includes:

and the number of the exhaust branch pipelines is consistent with that of the air inlets, one end of each exhaust branch pipeline is communicated with one air inlet, and the other end of each exhaust branch pipeline is communicated with the air outlet of the compressor.

2. The compressor discharge arrangement of claim 1, further comprising:

one end of the first main straight pipe section is communicated with an air outlet of the compressor, and the other end of the first main straight pipe section is communicated with the exhaust branch pipeline;

a distribution portion formed in a region where the other end of the first total straight pipe section communicates with the exhaust branch pipe, for distributing the gas from the first total straight pipe section into the exhaust branch pipe.

3. The compressor discharge structure according to claim 2, wherein the discharge branch pipe includes a branch pipe bent section and a branch pipe straight section, the branch pipe straight section being parallel to the first main straight section.

4. A compressor discharge air structure according to claim 3, wherein said branch pipe bent pipe section and said branch pipe straight pipe section are of an integrally formed structure.

5. The compressor discharge structure according to claim 1, wherein a plurality of the intake ports have the same height above the oil separator, and a plurality of the discharge branch pipes are located on the same plane.

6. The compressor discharge arrangement of claim 5, further comprising:

one end of the second main straight pipe section is communicated with the exhaust port of the oil separator, and the other end of the second main straight pipe section is communicated with the condenser;

the second total straight pipe section is perpendicular to the plane of the exhaust branch pipe.

7. The compressor discharge structure according to any one of claims 1 to 6, wherein the oil separator includes an outer cylinder forming an outer cylinder inner cavity, the intake port and the discharge port each being formed on the outer cylinder; be formed with exhaust passage in the outer barrel inner chamber, exhaust passage includes certainly the first exhaust pipe of the top downwardly extending of outer barrel and certainly the gas vent to the second exhaust pipe of the lower extreme opening extension of first exhaust pipe, the second exhaust pipe stretches into first exhaust pipe.

8. The compressor discharge structure according to claim 7, wherein a separation portion is further formed in the outer cylinder inner chamber, the separation portion being located below the first discharge cylinder and routed around the second discharge cylinder.

9. The compressor discharge structure according to claim 8, wherein the separation portion has a tapered structure.

10. A refrigeration apparatus, comprising a compressor discharge structure as recited in any one of claims 1 to 9.

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