An oil separator for compression refrigeration system

Abstract

An oil separator for a compression refrigeration system includes an oil separator housing, a filter screen, and an oil level monitoring device, characterized in that an exhaust pulse baffle is provided in the oil storage area of ​​the oil separator, and the exhaust pulse baffle isolates the area of ​​the oil storage area close to the action part of the oil level monitoring device to form an oil level monitoring area, and at the same time, the bottom of the oil level monitoring area is connected to the bottom of the oil storage area, and the top of the oil level monitoring area is connected to the upper part of the working space, and the oil level monitoring device faces the oil level monitoring area. Since relative isolation measures are taken in the monitored area, the isolation can greatly reduce the impact of the ups and downs of the oil level in the oil storage area caused by the exhaust pulse on the oil level monitoring area, and the connection can correctly reflect the real and stable oil level of the oil storage area. This solution can solve the problem of ups and downs of the oil level caused by the exhaust pulse in a smaller filtering and oil storage space, so that the oil sight glass and / or the oil level switch can monitor the correct and stable oil level.

Description

Technical Field

[0001] The present invention relates to an oil separator, and in particular to an oil separator used in a compression refrigeration system. The oil separator can ensure that the oil level monitored by an oil sight glass or an oil level switch is a correct and stable oil level, so as to accurately obtain the actual amount of lubricating oil currently carried by the refrigeration medium in the compression refrigeration system. Background Art

[0002] In the compression refrigeration system, the lubricating oil carried by the refrigerant in the working cycle not only lubricates the compressor, but also cools it. The oil separator is an indispensable auxiliary device in the compression refrigeration system. It is usually installed between the compressor discharge port and the condenser of the compression refrigeration unit to separate the lubricating oil from the high-pressure gas discharged from the compressor, so as to prevent excessive lubricating oil from entering the condenser and evaporator to affect the heat exchange effect and reduce the cooling capacity and efficiency.

[0003] On July 11, 2007, China's patent CN2921725Y announced the authorization of a utility model patent with patent number 2006200712825 and the name "Oil Separator for Compression Refrigeration System". As an earlier technology of oil separator, this patent has obvious shortcomings of large size and non-compact structure. With the continuous improvement of compression refrigeration system, oil separators are gradually developing in the direction of high-efficiency miniaturization and compact structure. Due to the limitations of miniaturization and compact structure, the oil storage space and filter space in the oil separator are further compressed, which also makes the oil level in the oil separator affected by the exhaust pulse of the compressor, and the liquid level fluctuates greatly, and it is impossible to obtain accurate oil level information from the sight glass or oil level gauge. On the other hand, using the oil level information of the oil separator in the compression refrigeration system to monitor the lubrication adequacy of the compressor during operation is not only a conventional technology but also very necessary. Since the oil level in the oil separator fluctuates greatly, it cannot reflect the correct oil level information. When the actual lubricating oil is insufficient, the compressor will be damaged due to the failure to timely alarm and prompt the filling of lubricating oil. In addition, since the exhaust pulse has great energy, it will cause the oil level to fluctuate greatly, and may also cause the monitor or monitor to give false alarms.

[0004] In view of this, how to improve the existing oil separator so that the oil sight glass or the oil level switch monitors a correct and stable oil level is the subject of the present invention. Summary of the invention

[0005] The present invention provides an oil separator for a compression refrigeration system, the purpose of which is to solve the problem that the oil level of the existing oil separator is unstable due to exhaust pulses, resulting in inaccurate monitoring of the lubrication status of the compressor during operation, and even easily causing false alarms or damage to the compressor due to lack of oil.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an oil separator for a compression refrigeration system, comprising an oil separator housing, a filter and an oil level monitoring device, the oil separator housing forming a working space for oil and gas separation, the oil separator housing being provided with an oil separator air inlet and an oil separator air exhaust hole, the oil separator air inlet being connected to the working space, the oil separator air exhaust hole being connected to the working space, the filter being placed in the working space and being located on the passage from the oil separator air inlet to the oil separator air exhaust hole, the lower part of the working space being provided with an oil storage area and an oil level monitoring device.

[0007] Its innovation lies in: in the working space, an exhaust pulse baffle is set for the oil storage area, and the exhaust pulse baffle isolates the area of ​​the oil storage area close to the working part of the oil level monitoring device to form an oil level monitoring area. At the same time, the bottom of the oil level monitoring area isolated by the exhaust pulse baffle is connected with the bottom of the oil storage area, and the top of the oil level monitoring area is connected with the upper part of the working space, and the oil level monitoring device faces the oil level monitoring area.

[0008] The relevant contents in the above technical solution are explained as follows:

[0009] 1. In the above scheme, the exhaust pulse baffle is a bent plate or a curved plate, which is divided into a first section and a second section according to different extension directions, wherein the first section is located in the oil storage area, and the second section extends upward from the oil storage area until it extends out of the oil storage area, thereby isolating the oil level monitoring area from the oil storage area. The bent plate is an L-shaped plate, which covers the concave groove to form an L-shaped channel.

[0010] 2. In the above scheme, corresponding to the exhaust pulse baffle, a concave groove is provided on the inner wall of the oil separator housing, and the exhaust pulse baffle and the concave groove cooperate to form an isolated oil level monitoring area.

[0011] 3. In the above scheme, the oil separator air inlet hole is divided into two air inlet channels to enter the working space, and two filter screens are arranged for the two air inlet channels. Each filter screen is installed in one air inlet channel, and the air outlets of the two air inlet channels are arranged face to face.

[0012] 4. In the above scheme, a compartment plate is provided in the workspace, which is fixed in the workspace and divides the workspace into a first compartment and a second compartment, the first compartment is connected to the oil separator air inlet, the second compartment is connected to the oil separator air outlet, and the first compartment is connected to the second compartment. The filter screen is composed of a first filter screen and a second filter screen, the first filter screen is fixedly installed in the first compartment, and the second filter screen is fixedly installed in the second compartment. The first compartment is divided into two air intake channels entering the second compartment, and two second filter screens are provided for the two air intake channels, each of which is installed in one air intake channel, and the air outlets of the two air intake channels are arranged face to face, and the exhaust pulse baffle is located between the air outlets of the two air intake channels.

[0013] The design concept and effect of the present invention are: in order to solve the problem that the oil level of the existing oil separator is unstable due to the exhaust pulse, which leads to inaccurate monitoring of the lubrication state of the compressor during operation, and even easily causes false alarms or damage to the compressor due to lack of oil, the present invention sets an exhaust pulse baffle in the oil storage area in the oil separator, and the exhaust pulse baffle isolates the area of ​​the oil storage area close to the working part of the oil level monitoring device to form an oil level monitoring area. Since the present invention adopts a relative isolation measure for the monitored area close to the working part of the oil level monitoring device through the exhaust pulse baffle, the relative isolation measure has two meanings. The first layer is that the oil level monitoring area and the oil storage area are isolated on all sides by the exhaust pulse baffle, and the second layer is that the oil level monitoring area and the oil storage area are only connected at the bottom. Isolation can greatly reduce the impact of the oil level fluctuations in the oil storage area caused by the exhaust pulse on the oil level monitoring area, and the connection can correctly reflect the real and stable oil level of the oil storage area. In short, the present invention has a reasonable design, a simple structure, and an ingenious concept. It can solve the problem of oil level fluctuations caused by the exhaust pulse in a smaller filtering and oil storage space, so that the oil sight glass or / and the oil level switch can monitor the correct and stable oil level. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 This is a front view of an embodiment of the present invention;

[0015] Attached Figure 2 A top view of an embodiment of the present invention;

[0016] Attached Figure 3 It is a left view of an embodiment of the present invention;

[0017] Attached Figure 4 It is a right view of an embodiment of the present invention;

[0018] Attached Figure 5 for Figure 1 EE cross-sectional view;

[0019] Attached Figure 6 for Figure 2 CC section view;

[0020] Attached Figure 7 for Figure 2 FF cross-sectional view;

[0021] Attached Figure 8 for Figure 7 Enlarged view of point A.

[0022] In the above drawings: 1. Oil separator housing; 2. Oil separator air inlet; 3. Oil separator exhaust hole; 4. Oil level monitoring device; 5. Oil storage area; 6. Exhaust pulse baffle; 7. Oil level monitoring area; 8. Bin plate; 9. First filter screen; 10. Second filter screen; 11. First chamber; 12. Second chamber; 13. Inspection port; 14. Oil drain valve; 15. Oil filter; 16. Exhaust check valve; 17. Bolt; 18. Filter screen; 19. Concave groove. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0024] Embodiment: An oil separator for a compression refrigeration system

[0025] like Figure 1-8 As shown, the oil separator includes an oil separator housing 1 (see Figure 1 and Figure 2 ), filter screen 18 and oil level monitoring device 4 (see Figure 4 ), the oil separator housing 1 forms a working space for oil and gas separation, and the oil separator housing 1 is provided with an oil separator air inlet 2 (see Figure 3 ) and oil vent 3 (see Figure 6 ), the oil inlet 2 is connected to the working space, the oil exhaust 3 is connected to the working space, the filter is placed in the working space and is located on the passage from the oil inlet 2 to the oil exhaust 3, and an oil storage area 5 is provided at the lower part of the working space (see Figure 6 ) and oil level monitoring device 4 (see Figure 4 and Figure 6 ).

[0026] In order to solve the problem that the oil level of the existing oil separator is unstable due to the exhaust pulse, which leads to inaccurate monitoring of the lubrication status of the compressor during operation, and even easily causes false alarms or damage to the compressor due to lack of oil, the innovation of the present invention is that: in the working space, an exhaust pulse baffle 6 is set for the oil storage area 5 (see Figure 5-8 ), the exhaust pulse partition 6 isolates the oil storage area 5 near the working part of the oil level monitoring device 4 to form an oil level monitoring area 7 (see Figure 6 ), and the bottom of the oil level monitoring area 7 isolated by the exhaust pulse partition 6 is connected to the bottom of the oil storage area 5 (see Figure 6), the top of the oil level monitoring area 7 is connected to the upper part of the working space, and the oil level monitoring device 4 faces the oil level monitoring area 7.

[0027] In order to improve the oil filtering effect and reduce the influence of exhaust pulse on the oil level fluctuation in the oil level monitoring area 7, the oil separator is designed to be a two-stage filter, namely the first stage filtration and the second stage filtration, and the oil level monitoring area 7 and the exhaust pulse partition 6 are deliberately arranged in the second stage filtration. The specific structure is as follows:

[0028] The working space is provided with a storage plate 8 (see Figure 5-7 ), the bin plate 8 is fixed in the working space and divides the working space into a first bin 11 and a second bin 12 (see Figure 5 ), the first chamber 11 is connected to the oil inlet hole 2, the second chamber 12 is connected to the oil exhaust hole 3, and the first chamber 11 is connected to the second chamber 12 (see Figure 5 The filter screen 18 is composed of a first filter screen 9 and a second filter screen 10. The first filter screen 9 is fixedly installed in the first chamber 11, and the second filter screen 10 is fixedly installed in the second chamber 12 (see Figure 5 and Figure 6 The oil inlet hole 2 is divided into two inlet channels entering the first chamber 11. Two first filters 9 are provided for the two inlet channels. Each first filter 9 is installed in one inlet channel. The air outlets of the two inlet channels are arranged face to face. The first chamber 11 is divided into two inlet channels entering the second chamber 12. Two second filters 10 are provided for the two inlet channels. Each second filter 10 is installed in one inlet channel. The air outlets of the two inlet channels are arranged face to face (see Figure 5 ), the exhaust pulse baffle 6 is located between the outlets of the two air inlet channels (see Figure 6 ).

[0029] The exhaust pulse baffle 6 is a bent plate or a curved plate, which is divided into a first section and a second section according to different extension directions, wherein the first section is located in the space of the oil storage area 5, and the second section extends upward from the oil storage area 5 until it extends out of the space of the oil storage area 5. It is best that the first section is located below the lowest liquid level of the oil storage area 5, and the second section extends upward from below the lowest liquid level of the oil storage area 5, thereby isolating the oil level monitoring area 7 from the oil storage area 5. However, in this embodiment, the bent plate is an L-shaped plate (see Figure 8 ), and is arranged in the second chamber 12 (see Figure 7 ), the bottom plate of the L-shaped plate is fixed close to the bottom inner wall of the oil separator housing 1 (see Figure 6 and Figure 8 ), the side piece of the L-shaped plate is fixed close to the inner wall of the side of the oil separator housing 1. The corresponding L-shaped plate is provided with a concave groove 19 on the inner wall of the oil separator housing 1, and the L-shaped plate covers the concave groove 19 to form an L-shaped channel (see Figure 6 ), the L-shaped channel forms an isolated oil level monitoring area 7. The bottom end of the L-shaped channel is connected to the oil storage area 5 (see Figure 6 ), the bottom sides of the L-shaped channel are isolated from the oil storage area 5 by the side walls of the concave groove 19 (see Figure 5 ), the top of the L-shaped channel is connected to the upper part of the working space (see Figure 6 ). See Figure 5-8 In this embodiment, an exhaust pulse baffle 6 (see Figure 8 ), so that the oil level detected by the oil sight glass or oil level switch is correct and stable. However, the oil level detected by the oil sight glass or oil level switch in the prior art may be a fluctuating oil level, which cannot accurately obtain the actual oil storage amount of the oil separator. In addition, the oil separator housing 1 of the oil separator of this embodiment is also provided with an inspection port 13 (see Figure 4 )、Oil drain valve 14 (see Figure 4 )、Oil filter 15 (see Figure 6 ), an exhaust check valve 16 is also provided in the oil inlet hole 2 (see Figure 6 ).

[0030] The oil level monitoring area 7 can be located on the passage from the filter 18 to the oil separator exhaust hole 3, or on the passage from the oil separator air inlet 2 to the filter 18. In this embodiment, the oil level monitoring area 7 is located on the passage from the filter 18 to the oil separator exhaust hole 3, and the exhaust pulse baffle 6 is fixed on the inner side of the oil separator housing 1.

[0031] The oil level of the oil separator is the basis for monitoring whether the compressor lubricating oil is sufficient through the oil sight glass or oil level switch. However, since the exhaust pulse has great energy, it will cause the oil level to fluctuate up and down, which will cause the monitor or the monitor to give a false alarm. When the oil separator is working, the oil-gas mixture is filtered through the multiple filters set in the gas and lubricating oil separation channel, and the lubricating oil falls into the oil storage area 5 at the bottom of the oil separator, and the gas is discharged from the oil separation exhaust hole 3. The present invention increases the exhaust pulse baffle 6 to block the exhaust pulse from blowing directly to the lubricating oil level, reduce the up and down fluctuation of the lubricating oil level, so that the oil sight glass or oil level switch can feedback the correct oil level.

[0032] The above embodiment designs the oil separator into two-stage filtration, but the present invention is not limited thereto, and the oil filtration stage can be one or three, but the oil separation measure should be set at the last stage as preferred, which can be understood and accepted by those skilled in the art.

[0033] The exhaust pulse baffle 6 in the above embodiment is formed by bending a long strip of steel plate, but the present invention is not limited thereto. Other alternatives may be integrally formed castings, plates of other shapes or similar functional materials.

[0034] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil separator for a compression refrigeration system, comprising an oil separator housing (1), a filter screen (18) and an oil level monitoring device (4), wherein the oil separator housing (1) forms a working space for oil and gas separation, the oil separator housing (1) is provided with an oil separator air inlet (2) and an oil separator air outlet (3), the oil separator air inlet (2) being in communication with the working space, the oil separator air outlet (3) being in communication with the working space, the filter screen being disposed in the working space and being located on a passage from the oil separator air inlet (2) to the oil separator air outlet (3), and an oil storage area (5) and an oil level monitoring device (4) being provided at the lower part of the working space; Features: In the working space, an exhaust pulse baffle (6) is provided for the oil storage area (5), and the exhaust pulse baffle (6) isolates the area of ​​the oil storage area (5) close to the working part of the oil level monitoring device (4) to form an oil level monitoring area (7). At the same time, the bottom of the oil level monitoring area (7) isolated by the exhaust pulse baffle (6) is connected to the bottom of the oil storage area (5), and the top of the oil level monitoring area (7) is connected to the upper part of the working space. The oil level monitoring device (4) faces the oil level monitoring area (7); A bin plate (8) is provided in the working space, the bin plate (8) being fixed in the working space and dividing the working space into a first bin (11) and a second bin (12), the first bin (11) being in communication with the oil separator air inlet (2), the second bin (12) being in communication with the oil separator air outlet (3), and the first bin (11) being in communication with the second bin (12); the filter screen (18) being composed of a first filter screen (9) and a second filter screen (10), the first filter screen (9) being fixedly mounted in the first bin (11), and the second filter screen (10) being fixedly mounted in the second bin (12); the oil separator air inlet (2) the two air intake channels are divided into two paths and enter the first chamber (11), two first filter screens (9) are provided for the two air intake channels, each of the first filter screens (9) is installed in one of the air intake channels, and the air outlets of the two air intake channels are arranged face to face; the first chamber (11) is divided into two air intake channels and enter the second chamber (12), two second filter screens (10) are provided for the two air intake channels, each of the second filter screens (10) is installed in one of the air intake channels, and the air outlets of the two air intake channels are arranged face to face, and the exhaust pulse baffle (6) is located between the air outlets of the two air intake channels; The exhaust pulse baffle (6) is a bent plate or a curved plate, and the bent plate or the curved plate is divided into a first section and a second section according to different extension directions, wherein the first section is located in the space of the oil storage area (5), and the second section extends upward from the oil storage area (5) until it extends out of the space of the oil storage area (5), the first section is located below the lowest liquid level of the oil storage area (5), and the second section extends upward from below the lowest liquid level of the oil storage area (5), thereby isolating the oil level monitoring area (7) from the oil storage area (5); the bent plate is an L-shaped plate, and is arranged in the second chamber 12, the L-shaped plate The bottom plate is fixed close to the bottom inner wall of the oil separator housing (1), and the side plate of the L-shaped plate is fixed close to the side inner wall of the oil separator housing (1); a concave groove (19) is provided on the inner wall of the oil separator housing (1) corresponding to the L-shaped plate, and the L-shaped plate covers the concave groove (19) to form an L-shaped channel, and the L-shaped channel forms an isolated oil level monitoring area (7); one end of the bottom of the L-shaped channel is connected to the oil storage area (5), and the two sides of the bottom of the L-shaped channel are isolated from the oil storage area (5) by the side walls of the concave groove (19), and the top of the L-shaped channel is connected to the upper part of the working space.

2. The oil separator for compression refrigeration system according to claim 1, characterized in that: The oil level monitoring area (7) is located on the passage from the filter screen (18) to the oil exhaust hole (3).

3. The oil separator for compression refrigeration system according to claim 1, characterized in that: The exhaust pulse baffle (6) is fixed on the inner side of the oil separator housing (1).

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