Oil separator and air conditioning unit

Abstract

The application provides an oil separator and an air conditioning unit. The oil separator comprises a shell, an inner shell arranged in the shell, and an acoustic cavity formed between the inner shell and the shell. The inner shell is provided with an acoustic hole communicating with the acoustic cavity. The oil separator and the air conditioning unit provided by the application set the inner shell in the shell and form the acoustic cavity. The gas enters or leaves the acoustic cavity through the acoustic hole on the inner shell, achieving the acoustic effect. Meanwhile, the airflow entering the inner shell first collides with the airflow entering the inner shell later, forming energy consumption to further inhibit noise, greatly reducing the noise decibels generated during the operation of the whole machine, and achieving the engineering noise reduction and silence effect. Moreover, the structure has the characteristics of high integration and small land installation. Furthermore, the structure utilizes the arrangement and cooperation of various components of the whole machine, realizes the lightweight of the whole machine, and occupies a small area of the engineering of the whole machine equipment, thereby reducing the production cost and use investment cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil separation, in particular to an oil separator and an air conditioning unit. BACKGROUND

[0002] Large screw type heating and ventilation equipment, due to its compressor being a double-screw male and female rotor meshing compression form, forming a periodic intermittent conveying of the compressed high-pressure medium characteristics, due to its internal fluorine road system needing refrigeration oil, to ensure that the screw meshes, the rotor is cooled, lubricated and sealed, and at the same time, its linear compression also determines that it needs clean refrigeration oil without large particles. Therefore, in order to obtain reliable and clean feeding refrigeration oil for the entire refrigerant circulation system, the screw type system will be provided with an oil separator.

[0003] At present, the main problem of screw compressor in engineering operation is its own machine noise, among which the air flow pulse vibration conducted in the oil separation is relatively large, causing the noise of the oil separation to be large, which seriously affects the user experience. SUMMARY

[0004] In order to solve the technical problem of excessive noise of the oil separator in the prior art, an oil separator and an air conditioning unit are provided, which form a sound attenuation cavity inside the shell to reduce noise.

[0005] An oil separator comprises:

[0006] a shell;

[0007] an inner shell arranged in the shell, and a sound attenuation cavity being formed between the inner shell and the shell;

[0008] a sound attenuation hole is arranged on the inner shell and communicates with the sound attenuation cavity;

[0009] an air inlet pipe, one end of which communicates with the outside of the shell, and the other end of which communicates with the inside of the inner shell.

[0010] The oil separator further comprises:

[0011] a separation cylinder arranged in the inner shell, and a flow cavity being formed between the separation cylinder and the inner shell, the air inlet pipe communicates with the flow cavity, and an opening is formed on the lower end surface of the flow cavity.

[0012] The air inlet direction of the air inlet pipe is parallel to the tangent direction of the connection position of the flow cavity and the air inlet pipe.

[0013] The shell has an upper cover plate, the inner shell and the separation cylinder are arranged on the upper cover plate, an air outlet is arranged on the upper cover plate, and the air outlet communicates with the separation cylinder.

[0014] The oil separator further comprises a filter screen structure arranged at the exhaust port.

[0015] The filter screen structure comprises a filter tube arranged in the separation cylinder, one end of the filter tube is communicated with the exhaust port, the other end of the filter tube is provided with a sealing plate, the side wall of the filter tube is provided with filter holes, the inside of the filter tube is communicated with the inside of the separation cylinder through the filter holes.

[0016] The length of the filter tube is less than the length of the separation cylinder in the direction away from the upper cover plate; and / or, the length of the separation cylinder is less than the length of the inner shell.

[0017] The oil separator further comprises a partition plate arranged in the sound attenuation cavity, and the partition plate divides the sound attenuation cavity into at least two sound attenuation areas, each of the sound attenuation areas is communicated with the inside of the inner shell through the sound attenuation holes.

[0018] The shell further has a lower cover plate, the inner shell is arranged on the lower cover plate, and the inner shell and the lower cover plate jointly enclose an oil storage cavity, the oil storage cavity is communicated with the flow cavity.

[0019] The oil separator further comprises an oil baffle between the oil storage cavity and the flow cavity.

[0020] The oil separator further comprises an oil filter arranged on the shell, the inlet of the oil filter is communicated with the oil storage cavity, and the outlet of the oil filter is communicated with the outside of the shell.

[0021] The shell comprises an outer cylinder and a middle cylinder, the middle cylinder is arranged in the outer cylinder, and a filling cavity is formed between the middle cylinder and the outer cylinder, the filling cavity is filled with sound absorption material, the inner shell is arranged in the middle cylinder, and the sound attenuation cavity is formed between the inner shell and the middle cylinder.

[0022] The sound absorption material comprises one or more of polyurethane, sponge, cotton and felt.

[0023] An air conditioning unit comprising the above oil separator.

[0024] The oil separator and air conditioning unit provided by the application have the advantages that the inner shell is arranged in the shell to form a sound attenuation cavity, gas enters or leaves the sound attenuation cavity through sound attenuation holes on the inner shell, sound attenuation effect is achieved, the airflow entering the inner shell first collides with the airflow entering the inner shell later, energy consumption is further inhibited, noise decibels generated during operation of the whole machine are greatly reduced, engineering noise reduction and silence effects are achieved, the structure has the characteristics of high integration and small land occupation, the arrangement and cooperation of various components of the whole machine are utilized to achieve the effects of light weight of the whole machine, small occupation of the whole machine on engineering area, and reduction of production cost and use investment cost. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A sectional view of the oil separator provided by the embodiment of the application is provided.

[0026] Figure 2 Another sectional view of the oil separator provided by the embodiment of the application is provided.

[0027] In the drawings:

[0028] 1, inner shell; 101, sound attenuation cavity; 11, sound attenuation hole; 2, air inlet pipe; 3, separation cylinder body; 102, flow cavity; 4, upper cover plate; 103, air outlet; 5, filter screen structure; 6, partition plate; 7, lower cover plate; 104, oil storage cavity; 8, oil baffle; 9, oil filter; 105, outer cylinder body; 106, middle cylinder body; 107, filling cavity. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the application more clear and obvious, the application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and do not limit the application.

[0030] As Figure 1 and Figure 2The oil separator shown comprises: a shell; an inner shell 1 arranged in the shell, and an acoustic cavity 101 formed between the inner shell 1 and the shell; the inner shell 1 is provided with an acoustic hole 11, which communicates with the acoustic cavity 101; and an air inlet pipe 2, one end of which communicates with the outside of the shell, and the other end of which communicates with the inside of the inner shell 1. The inner shell 1 is arranged in the shell to form the acoustic cavity 101, the gas enters or exits the acoustic cavity 101 through the acoustic hole 11 on the inner shell 1 to achieve the effect of noise reduction, and the airflow entering the inner shell 1 first collides with the airflow entering the inner shell 1 later to form energy consumption to further suppress noise, thereby greatly reducing the noise level generated by the whole machine during operation to achieve the effect of engineering noise reduction. And this structure has the characteristics of high integration and small installation area, and further utilizes the arrangement and cooperation of various components of the whole machine to realize the effects of lightweight of the whole machine and small engineering area occupied by the whole machine equipment, thereby reducing the production cost and use investment cost.

[0031] The oil separator further comprises: a separation cylinder 3 arranged in the inner shell 1, and a flow cavity 102 formed between the separation cylinder 3 and the inner shell 1, the air inlet pipe 2 communicates with the flow cavity 102, and an opening is formed on the lower end surface of the flow cavity 102. After flowing into the inner shell 1, the fluid will flow under the structural restriction in the flow cavity 102, and the lubricating oil in the fluid will be separated out, the separated oil will flow downward under the action of gravity and be discharged from the flow cavity 102 through the opening, thereby realizing oil-gas separation.

[0032] The air inlet direction of the air inlet pipe 2 is parallel to the tangent direction of the connection position of the flow cavity 102 and the air inlet pipe 2. The fluid enters the flow cavity 102 along the tangent direction of the flow cavity 102, thereby increasing the spiral flow effect of the fluid and increasing the oil-gas separation effect.

[0033] The shell has an upper cover plate 4, the inner shell 1 and the separation cylinder 3 are arranged on the upper cover plate 4, the upper cover plate 4 is provided with an exhaust port 103, and the exhaust port 103 communicates with the separation cylinder 3. The fluid flowing in the flow cavity 102 is subjected to oil-gas separation, the separated lubricating oil flows downward under the action of gravity, the separated refrigerant flows upward, and can only flow into the inside of the separation cylinder 3 under the limitation of the structure, and is finally discharged through the exhaust port 103.

[0034] The part of the separation cylinder 3 away from the upper cover plate 4 is connected with the inner shell 1 through a reinforcing plate to ensure the reliable fixation of the separation cylinder 3.

[0035] In order to further improve the separation effect, the oil separator further comprises a filter screen structure 5 arranged at the exhaust port 103. The filter screen structure 5 is used to filter the refrigerant again before being discharged, so as to filter the lubricating oil again and ensure the cleanliness of the refrigerant.

[0036] Specifically, the filter screen structure 5 comprises a filter pipe arranged in the separation cylinder 3, one end of the filter pipe is communicated with the exhaust port 103, the other end of the filter pipe is provided with a sealing plate, the side wall of the filter pipe is provided with filter holes, and the inside of the filter pipe is communicated with the inside of the separation cylinder 3 through the filter holes. The opening of the sealing plate is towards the separation cylinder 3, so that the separated refrigerant can only enter the inside of the filter pipe through the filter holes on the side wall of the filter pipe. In this process, the refrigerant needs to bend and flow, so as to improve the filtering effect of the filter pipe.

[0037] The length of the filter pipe is less than the length of the separation cylinder 3 in the direction away from the upper cover plate 4. The airflow in the flow cavity 102 can bend and flow upwards after flowing through the separation cylinder 3, and finally reaches the filter pipe. The bending flow is used to increase the oil-gas separation effect.

[0038] The length of the separation cylinder 3 is less than the length of the inner shell 1. The volume of the flow cavity 102 is increased as much as possible, so as to increase the oil-gas separation effect.

[0039] The oil separator further comprises a partition plate 6 arranged in the sound attenuation cavity 101, and the sound attenuation cavity 101 is divided into at least two sound attenuation areas by the partition plate 6. Each sound attenuation area is communicated with the inside of the inner shell 1 through the sound attenuation holes 11. By forming multiple sound attenuation areas, the noise reduction effect is increased. The volumes of the sound attenuation areas are different, which can eliminate noise of different frequencies, and further improve the sound attenuation effect.

[0040] The shell further has a lower cover plate 7, the inner shell 1 is arranged on the lower cover plate 7, and the inner shell 1 and the lower cover plate 7 jointly enclose an oil storage cavity 104, and the oil storage cavity 104 is communicated with the flow cavity 102. The separated lubricating oil in the flow cavity 102 will drop into the oil storage cavity 104 under the action of gravity, so as to realize the collection of the lubricating oil.

[0041] The oil separator further comprises an oil baffle 8 located between the oil storage cavity 104 and the flow cavity 102. The oil baffle 8 is used to avoid the splashing of the lubricating oil on the oil surface of the oil storage cavity 104, so as to cause the liquid surface to be unstable and affect the detection of the liquid level switch.

[0042] The oil separator further comprises an oil filter 9 arranged on the shell, an inlet of the oil filter 9 being communicated with the oil storage cavity 104, and an outlet of the oil filter 9 being communicated with the outside of the shell.

[0043] The shell comprises an outer cylinder 105 and a middle cylinder 106 arranged in the outer cylinder 105, and a filling cavity 107 is formed between the middle cylinder 106 and the outer cylinder 105, and the filling cavity 107 is filled with sound-absorbing material, and the inner shell 1 is arranged in the middle cylinder 106, and the sound-absorbing cavity 101 is formed between the inner shell 1 and the middle cylinder 106.

[0044] The sound-absorbing material comprises one or more of polyurethane, sponge, cotton and felt.

[0045] An air conditioning unit comprising the above oil separator.

[0046] The above-mentioned embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. An oil separator, characterized in that: include: case; Inner shell (1), the inner shell (1) is disposed inside the outer shell, and a sound-absorbing cavity (101) is formed between the inner shell (1) and the outer shell. The inner shell (1) is provided with a sound-absorbing hole (11), which is connected to the sound-absorbing cavity (101); An air intake pipe (2) is provided, one end of which is connected to the outside of the housing and the other end of which is connected to the inside of the inner housing (1). The oil separator also includes: Separating cylinder (3), the separating cylinder (3) is disposed inside the inner shell (1), and a flow cavity (102) is formed between the separating cylinder (3) and the inner shell (1). The air inlet pipe (2) is connected to the flow cavity (102), and an opening is formed on the lower end face of the flow cavity (102).

2. The oil separator according to claim 1, characterized in that: The air intake direction of the air intake pipe (2) is parallel to the tangent direction of the connection position between the flow chamber (102) and the air intake pipe (2).

3. The oil separator according to claim 1, characterized in that: The shell has an upper cover plate (4), the inner shell (1) and the separation cylinder (3) are both disposed on the upper cover plate (4), and the upper cover plate (4) is provided with an exhaust port (103), which is connected to the separation cylinder (3).

4. The oil separator according to claim 3, characterized in that: The oil separator also includes a filter structure (5) which is located at the exhaust port (103).

5. The oil separator according to claim 4, characterized in that: The filter structure (5) includes a filter tube, which is disposed inside the separation cylinder (3). One end of the filter tube is connected to the exhaust port (103), and the other end is provided with a sealing plate. The side wall of the filter tube is provided with filter holes, and the interior of the filter tube is connected to the interior of the separation cylinder (3) through the filter holes.

6. The oil separator according to claim 5, characterized in that: Along the direction away from the upper cover plate (4), the length of the filter tube is less than the length of the separation cylinder (3); and / or, the length of the separation cylinder (3) is less than the length of the inner shell (1).

7. The oil separator according to claim 1, characterized in that: The oil separator also includes a partition plate (6), which is disposed in the silencing cavity (101) and divides the silencing cavity (101) into at least two silencing areas. Each silencing area is connected to the interior of the inner shell (1) through the silencing hole (11).

8. The oil separator according to claim 3, characterized in that: The housing also has a lower cover plate (7), the inner shell (1) is disposed on the lower cover plate (7), and the inner shell (1) and the lower cover plate (7) together form an oil storage cavity (104), the oil storage cavity (104) is connected to the flow cavity (102).

9. The oil separator according to claim 8, characterized in that: The oil separator also includes an oil baffle (8), which is located between the oil storage chamber (104) and the flow chamber (102).

10. The oil separator according to claim 8, characterized in that: The oil separator also includes an oil filter (9), which is disposed on the housing, and the inlet of the oil filter (9) is connected to the oil storage chamber (104), and the outlet of the oil filter (9) is connected to the outside of the housing.

11. The oil separator according to claim 1, characterized in that: The housing includes an outer cylinder (105) and a middle cylinder (106). The middle cylinder (106) is disposed inside the outer cylinder (105), and a filling cavity (107) is formed between the middle cylinder (106) and the outer cylinder (105). The filling cavity (107) is filled with sound-absorbing material. The inner shell (1) is disposed inside the middle cylinder (106), and a sound-absorbing cavity (101) is formed between the inner shell (1) and the middle cylinder (106).

12. The oil separator according to claim 11, characterized in that: The sound-absorbing material includes one or more of polyurethane, sponge, cotton, and felt.

13. An air conditioning unit, characterized in that: The oil separator includes any one of claims 1 to 12.

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