Built-in oil separation structure and condenser

Abstract

The application discloses a built-in oil separation structure and a condenser, two layers of filter screens are arranged below at least one air inlet, an oil separation interval space is formed between the two layers of filter screens through a baffle containing a part of vertical structure; the baffle is provided with a notch above the upper layer of filter screens as a secondary outflow notch, and at least one notch is arranged between the two layers of filter screens along the direction of the center line of the cylinder as a primary outflow notch; a V-shaped bottom partition plate with a bottom notch is arranged below the lower layer of filter screens, the bottom notch of the bottom plate is opposite to the lower layer of filter screens above in a spaced manner, and the oil separation interval space above the bottom partition plate is communicated with a condensing area in which a condensing pipe is arranged below. The application is simple in assembly, can further reduce the volume occupied by the built-in oil separation under the condition of the same filter screen area, increase the pipe arrangement area of the condensing area, improve the pipe arrangement rate of the condenser, and avoid the risk that the refrigerant liquid falls back to the built-in oil separation.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning and industrial refrigeration technology, and particularly relates to a built-in oil separator structure and a condenser using this structure. Background Technology

[0002] Air conditioning and industrial refrigeration units mainly consist of components such as evaporators, condensers, oil separators, compressors, and throttling devices. The oil separator primarily separates refrigerant from compressor lubricating oil. Currently, most systems integrate the oil separator into the condenser (collectively referred to as an integrated oil separator). Its advantage is that it reduces the unit's footprint, making the unit structure more compact. The integrated oil separator mainly separates compressor lubricating oil and gaseous refrigerant entering the condenser. If the separation efficiency is too low, lubricating oil will enter the condenser zone and the evaporator interior, adhering to the heat exchange tubes (the outer surface of the evaporator and condenser tubes), affecting heat exchange efficiency. The integrated oil separator mainly separates lubricating oil and gaseous refrigerant through the filtration effect of a filter screen. Its separation efficiency is mainly controlled by adjusting the filter screen area to regulate the flow rate through the filter. Currently, integrated oil separator condensers have the following shortcomings:

[0003] 1. In order to ensure sufficient filter area, the built-in oil separator has an excessively large volume, which occupies a large area of ​​the condenser piping, resulting in a low condenser piping rate.

[0004] 2. The built-in oil separator and condenser are arranged on the left and right. When the gaseous refrigerant directly flows from the outlet of the built-in oil separator to the left (or right) to flush the condenser, the condensed liquid refrigerant is affected by the airflow and may fall back into the built-in oil separator, which will cause oil separation and refrigerant accumulation, thereby reducing the condensation efficiency and oil separation efficiency.

[0005] 3. High assembly difficulty; In order to ensure separation efficiency, the built-in oil separator air inlet needs to be completely separated from the condenser chamber. The baffles at both ends of the air inlet are located in the middle of the condenser, which makes welding and assembly difficult. Summary of the Invention

[0006] The technical problem this invention aims to solve is to provide a built-in oil separator structure and condenser, which, with the same filter screen area, can further reduce the volume occupied by the built-in oil separator, increase the piping area of ​​the condensing zone, and improve the condenser piping ratio; thus avoiding the risk of refrigerant liquid falling back into the built-in oil separator. At the same time, the condenser has a higher condenser piping ratio and is simpler to assemble.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] An internal oil separator structure, characterized in that:

[0009] Two layers of filter screens are respectively arranged below at least one air inlet, and an oil separation space is formed between the two layers of filter screens by a baffle containing a partially vertical structure; the baffle is provided with at least one notch between the two layers of filter screens along the center line of the cylinder as a primary outflow notch; the baffle is provided with a notch above the upper layer of filter screen as a secondary outflow notch along the vertical direction;

[0010] A V-shaped bottom partition with a bottom notch is provided below the lower filter screen. The bottom notch is directly opposite the lower filter screen above, and the oil separation space above the bottom partition is connected to the space below.

[0011] In the above technical solution, two air inlets are arranged horizontally, and a primary filter is arranged below each air inlet. A secondary filter is arranged parallel above the primary filter. The primary and secondary filters are connected by a vertical stepped baffle to form an oil separation space. The stepped baffle has a notch on the secondary filter as a secondary outflow notch, and a notch is arranged between the primary and secondary filters at both ends along the center line of the cylinder as a primary outflow notch.

[0012] A condenser with a built-in oil separator structure, comprising a transverse cylinder and an air inlet, characterized in that:

[0013] Two layers of filters are respectively installed below at least one air inlet, and an oil separation space is formed between the two filters by a baffle containing a partial vertical structure; the baffle has a notch above the upper filter as a secondary outflow notch along the vertical direction, and at least one notch between the two filters as a primary outflow notch along the center line of the cylinder.

[0014] A V-shaped bottom baffle with a bottom notch is provided below the lower filter screen. The bottom notch is directly opposite the lower filter screen above, and the oil separation space above the bottom baffle is connected to the condensation area where the condenser pipe is arranged below.

[0015] In the above technical solution, air inlets are provided at both ends of the cylinder, a primary filter is provided below each air inlet, and a secondary filter is provided parallel above the primary filter. The primary and secondary filters are connected by a vertical stepped baffle to form an oil separation space. The stepped baffle has a notch on the secondary filter as a secondary outflow notch, and a notch is provided between the primary and secondary filters at both ends along the center line of the cylinder as a primary outflow notch.

[0016] Below each primary filter screen, there is a V-shaped bottom baffle consisting of a horizontal surface and a downward sloping surface. The bottom baffle has a bottom plate notch at the horizontal surface. Each bottom plate notch is open and directly faces the primary filter screen at its end, and the oil separator space above the bottom baffle is connected to the condensation zone where the condenser pipe is arranged below.

[0017] In the above technical solution, a notch is provided at the lower ends of both ends of the stepped baffle and near the primary filter screen on the same side as a primary outflow notch, and a long strip-shaped notch extending along the center line of the cylinder is provided at the upper middle edge of the stepped baffle and near the secondary filter screen as a secondary outflow notch.

[0018] In the above technical solution, the oil separation interval space is formed by two vertically parallel first baffles away from the end plate, two vertically parallel second baffles close to the end plate, and a stepped baffle extending laterally in the middle. The bottom of both ends of the closed oil separation space is a bottom partition. The bottom partition divides the cross-sectional area of ​​the condenser shell into a condensation zone and an oil separation zone in the vertical direction.

[0019] In the above technical solution, the oil separation space allows the refrigerant gas and lubricating oil to be separated once by passing through a primary filter screen downwards. The separated refrigerant gas and the remaining lubricating oil are then separated again by passing through a secondary filter screen upwards. After separation, the lubricating oil falls back into the oil storage area under gravity. The separated gaseous refrigerant flows out through the secondary outflow notch at the top of the stepped baffle, flows down through the bottom plate notch, exchanges heat with the condenser tube, condenses, and then flows out through the liquid outlet pipe at the bottom of the cylinder.

[0020] In the above technical solution, the secondary filter is fixed on the opposite side of the cylinder away from the bottom plate notch, and the projections of the secondary filter and the primary filter have no overlapping area; and the secondary filter does not block the bottom plate notch.

[0021] In the above technical solution, at the lowest point of the oil separation zone, the bottom baffle and the shell form an oil storage area, and an external oil drain pipe is installed in the oil storage area.

[0022] In the above technical solution, the downward slope of the bottom partition and the shell form an oil storage area, and an external oil discharge pipe is provided in the oil storage area with the same inclination angle as the slope of the bottom partition.

[0023] In the above technical solution, a liquid outlet connected to the condensation zone is provided at the bottom of the cylinder.

[0024] Compared with existing technologies, the present invention has the following beneficial effects:

[0025] By longitudinally distributing the primary and secondary filters, the length of the secondary filter can be increased, and the area of ​​the secondary filter can be increased by about 15%. With the same filter area, the volume occupied by the built-in oil separator can be further reduced, the piping area of ​​the condenser zone can be increased, and the piping ratio of the condenser can be improved by about 10%.

[0026] Adjust the bottom partition design, changing it from vertical-sloping downwards to horizontal-sloping downwards, increasing the pipe laying rate by approximately 5%.

[0027] The primary and secondary filters are arranged longitudinally, and the refrigerant outlet of the built-in oil separator is located at the top of the condenser tube, which avoids the risk of refrigerant liquid falling back into the built-in oil separator.

[0028] Distributing the air inlets at both ends of the condenser reduces assembly difficulty. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0030] Figure 1 This is a structural diagram of the built-in oil separator and condenser of the present invention.

[0031] Figure 2 This is a schematic diagram of the functional partitions of the condenser with the built-in oil separator structure of the present invention.

[0032] Figure 3 This is a side cross-sectional view of the condenser with the built-in oil separator structure of the present invention.

[0033] Figure 4 This is a side sectional view of the condenser section structure with built-in oil separator of the present invention.

[0034] Figure 5 This is a three-dimensional schematic diagram of the built-in oil separation structure of the present invention.

[0035] Figure 6 This is a detailed structural diagram of the bottom partition 4-3 of the present invention.

[0036] Figure 7 These are detailed views of the stepped baffle 4-6 of the present invention. Detailed Implementation

[0037] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0038] like Figure 1 As shown, the built-in oil separator structure implemented according to the embodiment of the present invention is set in the condenser. The condenser is mainly composed of a shell 3 sandwiched between two tube plates 1 at both ends. The shell 3 contains a condenser tube 2 and a built-in oil separator 4. The air inlet pipe 5, the oil outlet pipe 6, and the liquid outlet pipe 7 are respectively connected to the inner cavity of the shell 3.

[0039] like Figure 2 The cross-sectional area of ​​the condenser shell 3 is divided into a condensation zone 31 and an oil separation zone 32. The condensation zone 31 is where the condenser tubes 2 are arranged, which is the main working area of ​​the condenser. The tube arrangement rate directly affects the condensation efficiency. The oil separation zone 32 is equipped with an internal oil separator 4, which is used to separate the compressor lubricating oil and gaseous refrigerant entering the condenser.

[0040] like Figure 2-7 Refrigerant gas and lubricating oil enter the built-in oil separator 4 of the oil separator zone 32 through the intake pipe 5 (with a first intake pipe branch 5-1 and a second intake pipe branch 5-2 located near the two end plates 1). Figure 2 and 3 The space is enclosed by two vertically parallel first baffles 4-4 (relatively away from end plate 1), two vertically parallel second baffles 4-5 (closer to end plate 1), and a stepped baffle 4-6 extending laterally in the middle. V-shaped rectangular plates at the bottom of both ends of this enclosed space serve as bottom partitions 4-3. These bottom partitions 4-3 vertically divide the cross-sectional area of ​​the condenser shell 3 into a condensation zone 31 and an oil separation zone 32. Each bottom partition 4-3 has a rectangular notch 431 on its upper side along the centerline of the shell. A primary filter 4-1 is installed above each rectangular notch 431, and a secondary filter 4-2 is installed parallel to the primary filter 4-1 above it. The secondary filter 4-2 is fixed to the side of the shell away from the rectangular notch 431, and the secondary filter 4-2 and the primary filter 4-1 do not overlap. The secondary filter 4-2 does not obstruct the rectangular notches 431 of the bottom partitions 4-3.

[0041] Since both the first baffle 4-4 and the second baffle 4-5 are located near the end of the housing, assembly and welding are convenient. The refrigerant gas and lubricating oil undergo primary separation through the primary filter 4-1. The separated mixture impacts the bottom baffle 4-3 for further separation. The separated lubricating oil flows out through the primary separation notch 461 below the stepped baffle 4-6 (e.g., ...). Figure 3-6 Due to gravity, the refrigerant gas flows along the bottom baffle 4-3 to the oil storage area formed by the bottom baffle 4-3 and the shell 3; the separated refrigerant gas and the remaining lubricating oil rise and pass through the secondary filter 4-2 for further separation. After separation, the lubricating oil falls back into the oil storage area under gravity and flows out through the oil outlet pipe 6; the primary filter 4-1 and the secondary filter 4-2 are arranged in parallel (e.g., Figure 3 This design increases the length of the secondary filter 4-2, allowing for a smaller oil separator area while maintaining the same filter area. This, in turn, increases the condenser area and improves the pipe layout. After separation, the gaseous refrigerant flows out through the upper secondary separation notch 462 of the stepped baffle 4-6, then flows downwards through the notch 431 of the bottom baffle 4-3. After heat exchange and condensation with the condenser tube 2, it flows out through the liquid outlet pipe 7. Because the gaseous refrigerant exchanges heat with the condenser tube 2 from top to bottom, it prevents the condensed liquid refrigerant from reversing and falling back into the built-in oil separator structure.

[0042] The built-in oil separator structure of this embodiment can be applied to the horizontal condenser of the above embodiment, and can also be applied to the same type of horizontal condenser with two or more air inlets.

[0043] Other embodiments will not be described in detail. It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A built-in oil separator structure, characterized in that: Two air inlets are arranged horizontally. A primary filter is installed below each air inlet as the lower filter. A secondary filter is installed parallel above the primary filter. The projections of the secondary filter and the primary filter do not overlap. An oil separation space is formed between the two filter layers by a stepped baffle with a partially vertical structure. The stepped baffle has a notch between the primary and secondary filters at both ends along the center line of the cylinder, serving as a primary outflow notch; the vertical structure of the stepped baffle has a notch above the upper filter as a secondary outflow notch. A V-shaped bottom partition with a bottom notch is provided below the lower filter screen. The bottom notch of the bottom partition faces the lower filter screen above, and the oil separation space above the bottom partition is connected to the space below the bottom partition.

2. An internal oil separation structure according to claim 1, characterized by: It has a horizontal surface and a V-shaped bottom partition composed of a horizontal downward slope, with a bottom plate notch at the horizontal surface of the bottom partition.

3. A condenser with a built-in oil separator structure, comprising a transverse cylinder and an air inlet, characterized in that: An air inlet is provided at both ends of the cylinder. A primary filter is provided below each air inlet. A secondary filter is provided parallel above the primary filter. The projections of the secondary filter and the primary filter do not overlap. An oil separation space is formed between the two filter layers by a stepped baffle with a partially vertical structure. The stepped baffle has a notch on the secondary filter screen along the vertical direction as a secondary outflow notch, and a notch is set between the primary filter screen and the secondary filter screen at both ends along the center line of the cylinder as a primary outflow notch respectively. Each primary filter is provided with a V-shaped bottom baffle with a bottom notch. The bottom notch of the bottom baffle is directly opposite the lower filter above, and the oil separation space above the bottom baffle is connected to the space below the bottom baffle.

4. The condenser with a built-in oil separator structure according to claim 3, characterized in that: Below each primary filter screen, there is a V-shaped bottom baffle consisting of a horizontal surface and a downward sloping surface. The bottom baffle has a bottom plate notch at the horizontal surface. Each bottom plate notch is open and directly faces the primary filter screen at its end, and the oil separator space above the bottom baffle is connected to the condensation zone where the condenser pipe is arranged below.

5. The condenser with a built-in oil separator structure according to claim 3, characterized in that: A notch is provided at each end of the stepped baffle below the primary filter screen on the same side as the primary outflow notch. A long strip-shaped notch extending along the center line of the cylinder is provided at the upper middle edge of the stepped baffle near the secondary filter screen as the secondary outflow notch.

6. The condenser with a built-in oil separator structure according to claim 3, characterized in that: The oil separation space is formed by two vertically parallel first baffles away from the end plate, two vertically parallel second baffles close to the end plate, and a stepped baffle extending laterally in the middle. The bottom of both ends of the closed oil separation space is a bottom baffle. The bottom baffle divides the cross-sectional area of ​​the condenser shell into a condensation zone and an oil separation zone in the vertical direction.

7. The condenser with a built-in oil separator structure according to claim 3, characterized in that: The oil separation space allows the refrigerant gas and lubricating oil to be separated once by passing through a primary filter downwards. The separated refrigerant gas and the remaining lubricating oil are then separated again by passing through a secondary filter upwards. After separation, the lubricating oil falls back into the oil storage area under gravity. The separated gaseous refrigerant flows out through the secondary outflow notch at the top of the stepped baffle, flows down through the bottom plate notch, exchanges heat with the condenser tube, condenses, and then flows out through the liquid outlet pipe at the bottom of the cylinder.

8. The condenser with a built-in oil separator structure according to claim 3, characterized in that: The secondary filter is fixed on the opposite side of the cylinder away from the bottom plate notch, and the secondary filter does not obstruct the bottom plate notch.

9. The condenser with a built-in oil separator structure according to claim 3, characterized in that: At the lowest point of the oil separation zone, the bottom baffle and the shell form an oil storage area, and an external oil drain pipe is installed in the oil storage area.

10. The condenser with a built-in oil separator structure according to claim 3, characterized in that: The downward slope of the bottom baffle and the shell form an oil storage area, and an external oil drain pipe is installed in the oil storage area with the same inclination angle as the slope of the bottom baffle.

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