Gas-liquid separator and refrigeration equipment applying same

Abstract

The utility model provides a gas-liquid separator and refrigeration equipment applying the gas-liquid separator. The gas-liquid separator comprises a shell; the at least one swirler is arranged in the shell; an outer containing cavity is formed between the swirler and the shell, an inner containing cavity is formed in the swirler, and a gas component outlet and a liquid component outlet which are communicated with the outer containing cavity are correspondingly formed in the upper portion and the lower portion of the inner containing cavity respectively; the air outlet pipe is communicated with the outer containing cavity and / or the inner containing cavity and the exterior of the shell, and the air inlet pipe is communicated with the interior containing cavity and the exterior of the shell below the air outlet pipe; and the at least one gas baffle plate is arranged in the outer accommodating cavity and is positioned between the liquid component outlet and the bottom of the shell. According to the gas-liquid separator and the refrigeration equipment applying the gas-liquid separator, the swirler is additionally arranged in the shell, the gas inlet pipe enters the swirler in the tangential direction, the rotating capacity of a gas-liquid mixture in a separation cavity of the swirler is enhanced, energy loss is reduced, gas-liquid separation is achieved through the centrifugal force effect, and the gas-liquid separation efficiency is improved. And a small amount of gas is further separated by a gas baffle plate at the lower part of the shell to improve the separation efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a gas-liquid separator and refrigeration equipment using the same. Background Art

[0002] In existing refrigeration systems, the gas-liquid separator mainly utilizes the inertial separation effect caused by the different densities of gas and liquid particles to separate the liquid particles carried in the compressor return air from the gaseous refrigerant, preventing the compressor from sucking in too many liquid particles and causing liquid hammer. Currently, compressors often use single-shell gas-liquid separators, which directly introduce the compressor return steam into the cavity of the single-shell gas-liquid separator, and achieve gas-liquid separation through the impact of the compressor return steam and the inner wall of the cavity of the gas-liquid separator.

[0003] However, this type of single-shell gas-liquid separator has limited gas-liquid separation effect, resulting in some liquid particles in the compressor return air after separation by the gas-liquid separator still being carried into the compressor by the gaseous refrigerant, which in turn causes liquid hammer in the compressor and frequent liquid-carrying startup that damages the compressor. In addition, the existing single-shell gas-liquid separator has poor oil-liquid separation effect on the compressor return air, resulting in some liquid refrigerant dissolved in the lubricating oil after separation by the gas-liquid separator, resulting in reduced lubrication effect of the lubricating oil recovered by the gas-liquid separator on the compressor. After long-term operation, the compressor may wear out, resulting in a reduced service life of the compressor and frequent maintenance. Utility Model Content

[0004] The utility model provides a gas-liquid separator and refrigeration equipment using the same, so as to solve the technical problem that the gas-liquid separation effect of the gas-liquid separator in the prior art is poor.

[0005] In order to solve the above problems, the technical solution adopted by the utility model is:

[0006] The utility model provides a gas-liquid separator, comprising:

[0007] case;

[0008] at least one cyclone disposed in the housing;

[0009] An outer cavity is formed between the cyclone and the shell, an inner cavity is formed inside the cyclone, and a gas outlet and a liquid outlet communicating with the outer cavity are respectively provided at the upper and lower parts of the inner cavity;

[0010] At least one air outlet pipe, connecting the outer cavity and / or the inner cavity with the outside of the shell,

[0011] At least one air inlet pipe, communicating the inner cavity with the outside of the shell below the air outlet pipe;

[0012] At least one air baffle is arranged in the outer chamber and located between the liquid outlet and the bottom of the shell.

[0013] Preferably, there are more than two air baffles, and each air baffle is arranged at intervals in an up-and-down manner between the liquid outlet and the bottom of the shell.

[0014] Preferably, the air baffle plates are provided with air guide holes, and the air guide holes of the uppermost air baffle plate face the liquid outlet, and the air guide holes of the lower air baffle plates face the air guide holes of the upper air baffle plates.

[0015] Preferably, the angle between the air baffle and the horizontal plane is 15 degrees.

[0016] Preferably, there are more than two cyclones, the gas outlet of the cyclone located at the bottom is connected to the air inlet pipe of the cyclone located at the top, and the air outlet pipe of the cyclone located at the top is connected to the top outer side of the shell.

[0017] Preferably, the lower portion of the cyclone presents a transition surface with a gradually decreasing outer diameter.

[0018] Preferably, the cyclone is cylindrical, and the angle between the transition surface and the vertical cylinder wall of the cyclone is 120-130 degrees.

[0019] Preferably, the diameter ratio of the gas outlet to the liquid outlet is 3:1.

[0020] Preferably, the distance ratio between the air inlet pipe and the gas outlet and the liquid outlet is 1:2.

[0021] Furthermore, the gas-liquid separator further comprises:

[0022] At least one reinforcing plate is fixedly connected between the shell and the cyclone.

[0023] Furthermore, the gas-liquid separator further comprises:

[0024] The liquid discharge pipe is arranged at the bottom of the shell body and is used for connecting the outer chamber with the outside of the shell body.

[0025] Preferably, the cyclone is eccentrically arranged relative to the vertical center axis of the housing.

[0026] The utility model also provides a refrigeration device, comprising a heat exchanger, a compressor and the above-mentioned gas-liquid separator, wherein an air outlet pipe is connected to the compressor.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] The utility model provides a gas-liquid separator and a refrigeration device using the same. A cyclone is added to the shell, and an air inlet pipe enters the cyclone tangentially, so as to enhance the rotation ability of the gas-liquid mixture in the cyclone separation chamber and reduce energy loss. The gas and liquid are separated by centrifugal force, and a small amount of gas is further separated by an air baffle at the bottom of the shell to improve the separation efficiency. At the same time, the dissolution of lubricating oil in the compressor and the gaseous refrigerant is reduced to delay the wear of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solution proposed by the utility model, it is described in detail below in combination with the embodiments and drawings. It should be understood that the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, these drawings can be changed under the concept of the utility model.

[0030] Figure 1 An overall schematic diagram of an embodiment of the gas-liquid separator provided by the utility model applied to an ice maker;

[0031] Figure 2 for Figure 1 Schematic diagram of the structure in which the carrier plate of the gas-liquid separator is at the highest height state.

[0032] Among them, the main marks of the drawings in the figure are:

[0033] 1. Shell; 11. External cavity; 12. Top cover; 13. Base; 2. Cyclone; 21. Internal cavity; 211. Gas outlet; 212. Liquid outlet; 3. Air outlet pipe; 4. Air inlet pipe; 5. Air baffle; 51. Air guide hole; 22. Transition surface; 6. Reinforcement plate; 7. Hook; 8. Support foot. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following is a summary of the technical problems, technical solutions and beneficial effects to be solved by the present invention. Figure 1-2 And embodiments, the utility model is further described in detail.

[0035] See also Figure 1-2 The gas-liquid separator provided by the utility model comprises:

[0036] Shell 1;

[0037] At least one cyclone 2 is disposed in the housing 1;

[0038] An outer chamber 11 is formed between the cyclone 2 and the shell 1, and an inner chamber 21 is formed inside the cyclone 2. An air outlet 211 and a liquid outlet 212 communicating with the outer chamber 11 are respectively disposed at the upper and lower parts of the inner chamber 21.

[0039] At least one air outlet pipe 3, connecting the outer chamber 11 and / or the inner chamber 21 with the outside of the shell 1, and at least one air inlet pipe 4, connecting the inner chamber 21 with the outside of the shell 1 below the air outlet pipe 3;

[0040] At least one air baffle 5 is disposed in the outer chamber 11 and located between the liquid outlet 212 and the bottom of the shell 1 .

[0041] See also Figure 1-2 In this embodiment, the air outlet pipe 3 is connected to the outer chamber 11 and the outside of the shell 1.

[0042] In other embodiments (not shown in the figures), the air outlet pipe 3 connects the inner cavity 21 with the outside of the shell 1 .

[0043] See also Figure 1-2 In this embodiment, the housing 1 includes:

[0044] A cylindrical main body; a top cover 12, which is covered and installed on the top of the main body and closes the upper end opening of the outer cavity 11 of the shell 1; a plurality of hooks 7 are provided on the outer side of the top cover 12 for auxiliary lifting; a base 13, which is covered and installed on the bottom end of the main body and closes the lower end opening of the outer cavity 11 of the shell 1; the air outlet pipe 3 passes through the top cover 12 to connect the outer cavity 11 and the outside of the shell 1; the inner bottom surface of the base 13 constitutes the liquid accumulation area at the bottom end of the outer cavity 11 of the shell 1; the shell 1 is fixedly supported on the horizontal ground by supporting feet 8 provided at the bottom of its main body or the outer side of the base.

[0045] See also Figure 1-2 In this embodiment, the lower part of the cyclone 2 presents a transition surface 22 with a gradually decreasing outer diameter.

[0046] See also Figure 1-2 As a preferred implementation of this embodiment, the cyclone 2 is cylindrical, the lower part of the cyclone 2 is truncated cone-shaped, and its transition surface 22 is an outer tapered surface of the truncated cone.

[0047] See also Figure 1-2 As a more preferred implementation of this embodiment, the angle θ between the transition surface 22 and the vertical cylinder wall (i.e., the vertical direction) of the cyclone 2 is 120-130 degrees; after the gas-liquid mixed phase in the compressor return air enters the lower frustum section of the cyclone 2, the inner diameter of the gas-liquid separator gradually decreases, resulting in an accelerated liquid rotation speed, and the impact force and pressure of the spiral flow on the inner wall of the frustum-shaped transition surface 22 increase, so the wear on the wall also increases. If the angle θ between the transition surface 22 and the vertical cylinder wall (i.e., the vertical direction) of the cyclone 2 is too large, it will lead to increased resistance. 120-130 degrees is the preferred value range of the angle θ.

[0048] See also Figure 1-2In this embodiment, the upper portion of the cyclone 2 is a tapered surface with a gradually decreasing outer diameter. The structure and function of the tapered surface refer to the transition surface 22 and will not be described in detail here.

[0049] See also Figure 1-2 In this embodiment, the diameter Φ2 of the gas outlet 211 is greater than the diameter Φ3 of the liquid outlet 212 .

[0050] See also Figure 1-2 As a preferred implementation of this embodiment, the diameter ratio of the gas outlet 211 and the liquid outlet 212 is 3:1.

[0051] See also Figure 1-2 In this embodiment, the height D2 of the gas outlet 211 is greater than the height D1 of the liquid outlet 212 .

[0052] See also Figure 1-2 As a preferred implementation of this embodiment, two air outlet pipes 3 are provided, and the two air outlet pipes 3 are arranged at intervals.

[0053] See also Figure 1-2 In this embodiment, the shell 1 is cylindrical, and the cyclone 2 is eccentrically arranged inside the shell 1 relative to the vertical center axis of the cylindrical shell 1. The air inlet pipe 4 is arranged to enter the inner cavity 21 of the cyclone 2 along a tangent direction deviating from the center axis of the cylindrical shell 1, so that the compressor return air mixed with liquid particles and gaseous refrigerant entering the inner cavity 21 of the cyclone 2 from the air inlet pipe 4 can generate a strong rotation ability and reduce energy loss after entering the inner cavity 21 of the cyclone 2, thereby improving the gas-liquid separation effect of the cyclone 2 on the compressor return air.

[0054] See also Figure 1-2 In one implementation of the present embodiment, the height of the cyclone 2 is D3=280-350mm. This preferred height range is the optimal range value calculated based on the gas-liquid mixed flow rate and separation efficiency of the air-conditioning outdoor unit system using the cyclone 2, the relative slip distance of the gas and liquid per unit time, the density of the refrigerant and the lubricating oil and related working pressure parameters, and the overall height of the gas-liquid separator and the layout of the whole machine.

[0055] See also Figure 1-2In one implementation of the present embodiment, the cyclone 2 is cylindrical, and the diameter Φ4 of the cyclone 2 is preferably 100 mm. The height of the air inlet pipe 4 is used as the dividing line to divide the inner chamber 21 of the cyclone 2 into an upper and lower chamber, and the distance ratio between the air inlet pipe 4 and the gas separation outlet 211 and the liquid separation outlet 212 is 1:2, so as to ensure that after the compressor return air enters the inner chamber 21 of the cyclone 2 from the height of the air inlet pipe 4, when the liquid-carrying gas sinks downward into the lower chamber with a relatively large height below the air inlet pipe 4, it can continuously impact the inner wall of the cyclone 2 for a long time in the lower chamber, thereby prolonging the gas-liquid separation effect of the cyclone 2 on the compressor return air. The diameter Φ1 of the air inlet pipe 4 is preferably Φ3<Φ1<Φ2.

[0056] In other embodiments, the housing 1 may be in the shape of a rotating container with an arc-shaped cross section.

[0057] In other embodiments, two or more intake pipes 4 may be provided.

[0058] See also Figure 1-2 In the present embodiment, more than two air baffles 5 are provided, and each air baffle 5 is arranged in an alternating manner between the liquid outlet 212 and the bottom of the shell 1. The separation liquid flowing out from the liquid outlet 212 at the bottom of the cyclone 2 falls step by step onto the air baffles 5 in the outer chamber 11 under the action of gravity. Since the liquid layer formed on the air baffle 5 by the dripping of the separation liquid is relatively thin, the gas can be easily separated from the thinner liquid layer for a second time when the separation liquid flows through the sheet metal air baffle 5.

[0059] See also Figure 1-2 In the present embodiment, the air baffle plate 5 is provided with an air guide hole 51, and the air guide hole 51 of the uppermost air baffle plate 5 faces the liquid outlet 212, and the air guide hole 51 of the lower air baffle plate 5 faces the air guide hole 51 of the upper air baffle plate 5, so that the liquid outlet 212 at the lower part of the cyclone 2 and the air guide holes 51 of each air baffle plate 5 located at different height directions constitute an air passage for returning the gaseous refrigerant separated by the secondary gas-liquid separation action of the air baffle plate 5 to the cyclone 2 for further gas-liquid separation.

[0060] See also Figure 1-2 In a preferred implementation manner of the present embodiment, the gas separation outlet 211 is a tubular opening extending vertically upward away from the liquid separation outlet 212 , and the liquid separation outlet 212 is a tubular opening extending downward away from the gas separation outlet 211 .

[0061] See also Figure 1-2 In a preferred implementation manner of the present embodiment, the angle between the air baffle plate 5 and the horizontal plane is 15 degrees, so that the liquid separated for the second time can fall down and be deposited at the bottom of the outer chamber 11 under the blocking effect of the air baffle plate 5.

[0062] In a preferred implementation of the present embodiment (not shown in the figure), more than two cyclones 2 are provided in the outer chamber 11 of the shell 1, and the gas separation outlet 211 of the cyclone 2 located at the bottom is connected to the air inlet pipe 4 of the cyclone 2 located at the top (that is, the air inlet pipe 4 and the air separation outlet 211 between the upper and lower cyclones are connected end to end), and the air outlet pipe 3 of the cyclone 2 located at the top is connected to the top outer side of the shell, so that the gas-liquid separator has a structure with multiple inner chambers 21 in series, realizing multi-stage separation to improve the gas-liquid separation efficiency.

[0063] See also Figure 1-2 In this embodiment, the gas-liquid separator further includes:

[0064] At least one reinforcing plate 6 is fixedly connected between the housing 1 and the cyclone 2 .

[0065] See also Figure 1-2 In one implementation of the present embodiment, two reinforcing plates 6 are provided, and the two reinforcing plates 6 are spaced apart from each other.

[0066] See also Figure 1-2 In one implementation of the present embodiment, the reinforcing plate 6 is annular, and its inner edge is fixedly connected to the outer wall of the cyclone 2, and its outer edge is fixedly connected to the inner wall of the shell 1. The reinforcing plate 6 is used to fix the cyclone 2 to the shell 1, thereby reducing the vibration and noise of the whole machine during operation, preventing fixed frequency resonance, and ensuring the strength of the whole machine body.

[0067] In this embodiment (not shown in the figure), the gas-liquid separator also includes:

[0068] The liquid discharge pipe is disposed at the bottom of the shell 1 and is used to connect the outer chamber 11 with the outside of the shell 1 .

[0069] The utility model also provides a refrigeration device, including a heat exchanger, a compressor, and the above-mentioned gas-liquid separator, wherein the gas outlet pipe 3 is connected to the compressor.

[0070] As a preferred embodiment, the refrigeration device is an air conditioner.

[0071] See also Figure 1-2 The working principle of the gas-liquid separator proposed in the utility model is as follows:

[0072] An eccentric cyclone 2 is embedded in the cylindrical shell 1. The cyclone 2 divides the internal space of the shell 1 into an inner cavity 21 and an outer cavity 11. The refrigerant channel includes an air inlet pipe 4 leading to the inner cavity 21 and two air outlet pipes 3 (via the inner cavity 21) connecting the outer cavity 11 and the outside of the top of the shell 1. The air inlet direction of the air inlet pipe 4 is tangential to the cyclone 2.

[0073] The gas-liquid separator proposed by the utility model uses the centrifugal sedimentation principle to separate phases with different densities in a heterogeneous mixture, that is, to separate the gaseous and liquid refrigerants in the air conditioning system. After the oil-gas mixture with a density difference enters the cyclone 2 from the air inlet pipe 4 in a certain direction and speed, under the action of the centrifugal field, the liquid phase as a phase with a large density is thrown to the surroundings, and flows downward along the inner wall surface of the cyclone 2, and is discharged from the cyclone 2 as a bottom flow, and drips to the bottom of the outer chamber 11 of the shell 1 after secondary oil-gas separation by the air baffle 5;

[0074] At the same time, the gas migrates to the middle of the inner chamber 21 of the cyclone 2 with low density and is discharged upward from the cyclone 2 into the outer chamber 11, and finally discharged from the gas-liquid separator through the outlet pipe 3, thereby achieving multiple gas-liquid separations and improving the gas-liquid separation effect, avoiding compressor liquid hammer, and reducing the miscibility of the lubricating oil in the compressor with the gaseous refrigerant to delay the wear of the compressor; the gas-liquid separator also has the advantages of small compressor return air separation resistance and low overall energy consumption.

[0075] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the utility model.

Claims

1. A gas-liquid separator, characterized in that: include: case; at least one cyclone disposed in the housing; An outer cavity is formed between the cyclone and the shell, an inner cavity is formed inside the cyclone, and a gas outlet and a liquid outlet communicating with the outer cavity are respectively provided at the upper and lower parts of the inner cavity; at least one air outlet pipe, connecting the outer cavity and / or the inner cavity with the outside of the shell, at least one air inlet pipe, communicating the inner cavity with the outside of the shell below the air outlet pipe; At least one air baffle is arranged in the outer chamber and located between the liquid outlet and the bottom of the shell.

2. The gas-liquid separator according to claim 1, characterized in that: There are more than two air baffles, and each air baffle is arranged in an up-and-down staggered manner between the liquid outlet and the bottom of the shell.

3. The gas-liquid separator according to claim 2, characterized in that: The air baffle plates are provided with air guide holes, and the air guide holes of the uppermost air baffle plate face the liquid outlet, and the air guide holes of the lower air baffle plates face the air guide holes of the upper air baffle plate.

4. The gas-liquid separator according to claim 1, characterized in that: The included angle between the air baffle and the horizontal plane is 15 degrees.

5. The gas-liquid separator according to any one of claims 1 to 4, characterized in that: The cyclones are provided with more than two, the gas outlet of the cyclone located at the bottom is connected with the air inlet pipe of the cyclone located at the top, and the air outlet pipe of the cyclone located at the top is connected with the top outer side of the shell.

6. The gas-liquid separator according to any one of claims 1 to 4, characterized in that: The lower part of the cyclone presents a transition surface with a gradually decreasing outer diameter.

7. The gas-liquid separator according to claim 6, characterized in that: The cyclone is cylindrical, and the angle between the transition surface and the vertical cylinder wall of the cyclone is 120-130 degrees.

8. The gas-liquid separator according to any one of claims 1 to 4, characterized in that: The diameter ratio of the gas outlet and the liquid outlet is 3:

1.

9. The gas-liquid separator according to any one of claims 1 to 4, characterized in that: The distance ratio between the air inlet pipe and the gas outlet and the liquid outlet is 1:

2.

10. The gas-liquid separator according to any one of claims 1 to 4, characterized in that: Also includes: At least one reinforcing plate is fixedly connected between the shell and the cyclone.

11. The gas-liquid separator according to any one of claims 1 to 4, characterized in that: Also includes: A liquid discharge pipe is arranged at the bottom of the shell and is used to connect the outer chamber with the outside of the shell.

12. The gas-liquid separator according to any one of claims 1 to 4, characterized in that: The cyclone is eccentrically arranged relative to the vertical center axis of the shell.

13. A refrigeration device, comprising a heat exchanger and a compressor, characterized in that: It also includes the gas-liquid separator as described in any one of claims 1 to 12, and the gas outlet pipe is connected to the compressor.

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