A gas-liquid separator and an air conditioning system using the same

Abstract

The present invention discloses a gas-liquid separator, wherein the gas-liquid separation tube is located inside the outer tube, and the gas-liquid separation tube includes an inner tube body and an outer tube body sleeved outside the inner tube body, a low-pressure channel is formed inside the inner tube body, a drainage hole is provided on the side wall of the low-pressure channel, and the two ends of the low-pressure channel are respectively connected to a low-pressure inlet and a low-pressure outlet, and a high-pressure channel is formed between the outer tube body and the inner tube body, and the two ends of the high-pressure channel are respectively connected to a high-pressure inlet and a high-pressure outlet. The gas-liquid separator with the above-mentioned optimized design has a compact structure, and the gas-liquid separation tube is formed by the inner tube body and the outer tube body. When the low-pressure gas passes through the low-pressure channel in the inner tube body and discharges the liquid through the drainage hole, heat exchange is performed with the high-pressure gas in the high-pressure channel through the side wall of the inner tube body, thereby reducing the gas temperature difference. The present invention also discloses an air conditioning system.

Description

Technical Field

[0001] The present invention relates to the field of heat exchange technology, and in particular to a gas-liquid separator and an air conditioning system using the gas-liquid separator. Background Art

[0002] As the use of air conditioners becomes wider and wider, the outdoor ambient temperature changes constantly. There are situations where the ambient temperature exceeds the operating range of ordinary air conditioner temperature regulation. For example, when the outdoor temperature is very low, air conditioning cooling is required (low-temperature cooling), or when the outdoor temperature is extremely low, heating is required (low-temperature heating), etc. When the air conditioner is running under the above conditions, the refrigerant exchanges heat in the outdoor unit, and a large amount of refrigerant needs to be stored in the gas-liquid separator without participating in heat exchange. When there is too much refrigerant in the gas-liquid separator, liquid refrigerant will appear in the return air pipe of the compressor, causing liquid hammer and damaging the compressor.

[0003] Therefore, the gas-liquid separator is an important component in the air conditioner, which prevents damage to the compressor by removing the liquid refrigerant. However, due to the uneven refrigerant temperature in various parts of the air conditioner, the working effect of the air conditioner is affected. Summary of the invention

[0004] In order to solve the technical problems existing in the background technology, the present invention provides a gas-liquid separator and an air conditioning system using the gas-liquid separator.

[0005] The present invention provides a gas-liquid separator, comprising: an outer cylinder, a gas-liquid separation tube;

[0006] The outer cylinder comprises a cylinder body and a cylinder cover, and the cylinder cover is provided with a high-pressure inlet, a high-pressure outlet, a low-pressure inlet, and a low-pressure outlet;

[0007] The gas-liquid separation tube is located inside the outer tube, and the gas-liquid separation tube includes an inner tube body and an outer tube body sleeved on the outside of the inner tube body. A low-pressure channel is formed inside the inner tube body, and a drainage hole is provided on the side wall of the low-pressure channel. The two ends of the low-pressure channel are respectively connected to the low-pressure inlet and the low-pressure outlet. A high-pressure channel is formed between the outer tube body and the inner tube body, and the two ends of the high-pressure channel are respectively connected to the high-pressure inlet and the high-pressure outlet.

[0008] Preferably, a preheating chamber is formed between the inner wall of the outer cylinder and the outer tube body, and the low-pressure channel is connected with the low-pressure inlet through the preheating chamber.

[0009] Preferably, it further comprises an air distribution member, which is located in the preheating chamber and between the low-pressure channel and the low-pressure inlet;

[0010] Preferably, the end of the low-pressure channel away from the low-pressure outlet is located on a side of the air distribution member away from the low-pressure inlet.

[0011] Preferably, the air distribution member has a cup-shaped structure with a middle portion protruding toward the cylinder cover.

[0012] Preferably, one end of the low-pressure channel away from the low-pressure outlet extends into the cup-shaped structure.

[0013] Preferably, the inner tube body comprises a heat exchange section and a preheating section connected in sequence, the preheating section is located at an end of the heat exchange section away from the low-pressure outlet, the drainage hole is located on the side wall of the heat exchange section, and the outer tube body is sleeved outside the heat exchange section.

[0014] Preferably, an oil filter nozzle is provided at the drainage hole;

[0015] Preferably, the inner tube body is fixedly connected to the inner wall of the outer tube through the oil filter nozzle.

[0016] Preferably, the high-pressure passage comprises a plurality of high-pressure flow paths extending from the high-pressure inlet to the high-pressure outlet, and the plurality of high-pressure flow paths are distributed around the inner tube body.

[0017] Preferably, the inner wall of the outer tube body is provided with a plurality of ribs extending from the high-pressure inlet to the high-pressure outlet, the plurality of ribs are distributed around the inner tube body and one high-pressure flow path is formed between two adjacent ribs.

[0018] Preferably, the high-pressure channel extends spirally around the low-pressure channel;

[0019] Preferably, an outer spiral groove extending around the outer wall of the inner tube body is provided on the outside of the inner tube body, and the outer spiral groove forms the high-pressure channel between the inner tube body and the outer tube body.

[0020] Preferably, the inner wall of the inner tube is provided with an inner spiral groove corresponding to the outer spiral groove.

[0021] Preferably, the flow directions in the high-pressure channel and the low-pressure channel are opposite.

[0022] In the present invention, the proposed gas-liquid separator has a gas-liquid separation tube located inside the outer tube, and the gas-liquid separation tube includes an inner tube body and an outer tube body sleeved outside the inner tube body, a low-pressure channel is formed inside the inner tube body, a drainage hole is provided on the side wall of the low-pressure channel, and the two ends of the low-pressure channel are respectively connected to the low-pressure inlet and the low-pressure outlet, and a high-pressure channel is formed between the outer tube body and the inner tube body, and the two ends of the high-pressure channel are respectively connected to the high-pressure inlet and the high-pressure outlet. The gas-liquid separator with the above-mentioned optimized design has a compact structure, and the gas-liquid separation tube is formed by the inner tube body and the outer tube body. When the low-pressure gas passes through the low-pressure channel in the inner tube body and discharges the liquid through the drainage hole, heat exchange is performed with the high-pressure gas in the high-pressure channel through the side wall of the inner tube body, thereby reducing the gas temperature difference.

[0023] The present invention also provides an air conditioning system, comprising the above-mentioned gas-liquid separator;

[0024] Preferably, it also includes an evaporator, a compressor, and a condenser;

[0025] The evaporator is provided with a first external high-pressure inlet and an external low-pressure outlet, the compressor is provided with an external low-pressure inlet and a first external high-pressure outlet, and the condenser is provided with a second external high-pressure inlet and a second external high-pressure outlet;

[0026] The external low-pressure outlet is communicated with the low-pressure inlet, the low-pressure outlet is communicated with the external low-pressure inlet, the first external high-pressure outlet is communicated with the second external high-pressure inlet, the second external high-pressure outlet is communicated with the high-pressure inlet, and the high-pressure outlet is communicated with the first external high-pressure inlet.

[0027] In the present invention, the proposed air-conditioning system sets the gas-liquid separator of the low-pressure channel as a double-layer casing structure, so that the low-pressure gas is separated from the liquid before entering the compressor, thereby effectively preventing liquid hammer from occurring in the compressor. At the same time, the low-pressure gas and the high-pressure gas exchange heat, thereby realizing heat recovery and heat exchange, thereby improving the cooling capacity and cooling efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of a gas-liquid separator proposed in the present invention.

[0029] Figure 2 This is a schematic structural diagram of a cylinder cover of a gas-liquid separator proposed by the present invention.

[0030] Figure 3 This is a schematic structural diagram of the cooperation between a gas-liquid separation tube and a gas distribution component of a gas-liquid separator proposed by the present invention.

[0031] Figure 4 This is a partial structural schematic diagram of the coordination of a gas-liquid separation tube, a gas distribution member and a tube cover of a gas-liquid separator proposed by the present invention.

[0032] Figure 5 The present invention is a schematic structural diagram of the cooperation between the inner tube body and the outer tube body of a gas-liquid separator proposed by the present invention.

[0033] Figure 6 Another structural schematic diagram of the cooperation between the inner tube body and the outer tube body of the gas-liquid separator proposed by the present invention.

[0034] Figure 7 This is a schematic structural diagram of an inner tube body of a gas-liquid separator proposed by the present invention.

[0035] Figure 8 A structural schematic diagram of a flow path of an air-conditioning system proposed by the present invention. DETAILED DESCRIPTION

[0036] like Figures 1 to 8 As shown, Figure 1 This is a schematic diagram of the structure of a gas-liquid separator proposed by the present invention. Figure 2 This is a schematic diagram of the structure of a cylinder cover of a gas-liquid separator proposed by the present invention. Figure 3 This is a schematic diagram of the structure of the gas-liquid separation pipe and gas distribution parts of a gas-liquid separator proposed by the present invention. Figure 4 This is a partial structural diagram of the gas-liquid separation pipe, gas distribution parts and tube cover of a gas-liquid separator proposed by the present invention. Figure 5 This is a schematic diagram of the structure of the inner tube body and the outer tube body of a gas-liquid separator proposed by the present invention. Figure 6 This is another structural schematic diagram of the inner tube body and the outer tube body of the gas-liquid separator proposed by the present invention. Figure 7 This is a schematic diagram of the structure of an inner tube body of a gas-liquid separator proposed by the present invention. Figure 8 A structural schematic diagram of a flow path of an air-conditioning system proposed by the present invention.

[0037] Reference Figure 1 and 2 The present invention provides a gas-liquid separator, comprising: an outer cylinder 1, a gas-liquid separation tube;

[0038] The outer cylinder 1 comprises a cylinder body and a cylinder cover 10, and the cylinder cover 10 is provided with a high-pressure inlet 11, a high-pressure outlet 12, a low-pressure inlet 13, and a low-pressure outlet 14;

[0039] The gas-liquid separation tube is located inside the outer tube 1, and the gas-liquid separation tube includes an inner tube body 2 and an outer tube body 3 sleeved on the outside of the inner tube body 2. A low-pressure channel is formed inside the inner tube body 2, and a drainage hole is provided on the side wall of the low-pressure channel. The two ends of the low-pressure channel are respectively connected to the low-pressure inlet 13 and the low-pressure outlet 14. A high-pressure channel is formed between the outer tube body 3 and the inner tube body 2, and the two ends of the high-pressure channel are respectively connected to the high-pressure inlet 11 and the high-pressure outlet 12.

[0040] During the specific working process of the gas-liquid separator of this embodiment, low-pressure gas enters the low-pressure channel inside the inner tube body through the low-pressure inlet, and the liquid in the low-pressure gas is discharged through the drain hole. At the same time, high-pressure liquid enters the high-pressure channel between the inner tube body and the outer tube body through the high-pressure inlet, and the two exchange heat through the tube wall. After the heat exchange is completed, the low-pressure gas flows out through the low-pressure outlet, and the high-pressure liquid flows out through the high-pressure outlet. In this process, heat exchange is performed between the high-pressure gas and the low-pressure gas to reduce the temperature difference of the refrigerant at different positions.

[0041] In this embodiment, the proposed gas-liquid separator has a gas-liquid separation tube located inside the outer tube, and the gas-liquid separation tube includes an inner tube body and an outer tube body sleeved outside the inner tube body, a low-pressure channel is formed inside the inner tube body, a drainage hole is provided on the side wall of the low-pressure channel, and the two ends of the low-pressure channel are respectively connected to the low-pressure inlet and the low-pressure outlet, and a high-pressure channel is formed between the outer tube body and the inner tube body, and the two ends of the high-pressure channel are respectively connected to the high-pressure inlet and the high-pressure outlet. With the above-mentioned optimized gas-liquid separator, the gas-liquid separation tube is formed by the inner tube body and the outer tube body, and in the process of the low-pressure gas passing through the low-pressure channel in the inner tube body and discharging the liquid through the drainage hole, the side wall of the inner tube body performs heat exchange with the high-pressure gas in the high-pressure channel, thereby reducing the gas temperature difference.

[0042] In order to explain in detail the working environment of the gas-liquid separator of this embodiment, this embodiment further proposes an air conditioning system including the above-mentioned gas-liquid separator.

[0043] In the specific design of the air-conditioning system, an evaporator 200, a compressor 300, and a condenser 400 are also included.

[0044] In the specific pipe connection mode, the evaporator 200 is provided with a first external high-pressure inlet and an external low-pressure outlet, the compressor 300 is provided with an external low-pressure inlet and a first external high-pressure outlet, and the condenser 400 is provided with a second external high-pressure inlet and a second external high-pressure outlet;

[0045] The external low-pressure outlet is communicated with the low-pressure inlet, the low-pressure outlet is communicated with the external low-pressure inlet, the first external high-pressure outlet is communicated with the second external high-pressure inlet, the second external high-pressure outlet is communicated with the high-pressure inlet, and the high-pressure outlet is communicated with the first external high-pressure inlet.

[0046] Reference Figure 8 In the coolant flow path, the coolant flows out from the external low-pressure outlet of the evaporator and enters the low-pressure channel of the gas-liquid separator to remove the liquid, and then flows into the compressor through the external low-pressure inlet, forming a high-pressure fluid in the compressor and flowing out from the first external high-pressure outlet, entering the second external high-pressure inlet of the condenser, and after condensing in the condenser, flows out from the second external high-pressure outlet, enters the high-pressure channel of the gas-liquid separator, exchanges heat with the coolant in the low-pressure channel, and then flows out from the high-pressure outlet, and finally returns to the evaporator through the first external high-pressure inlet; in the entire flow path, the high-pressure fluid and the low-pressure fluid exchange heat in the gas-liquid separator.

[0047] In this embodiment, the proposed air-conditioning system sets the gas-liquid separator of the low-pressure channel as a double-layer casing structure, so that the low-pressure gas is separated from the liquid before entering the compressor, thereby effectively preventing liquid hammer from occurring in the compressor. At the same time, the low-pressure gas and the high-pressure gas exchange heat, thereby realizing heat recovery and heat exchange, thereby improving the cooling capacity and cooling efficiency of the system.

[0048] In a specific embodiment of the gas-liquid separator, a preheating chamber is formed between the inner wall of the outer cylinder 1 and the outer tube body 3, and the low-pressure channel is connected to the low-pressure inlet 13 through the preheating chamber; after the low-pressure gas enters the outer cylinder through the low-pressure inlet, it is first preheated in the preheating chamber between the outer cylinder and the outer tube, through the outer wall of the outer tube body, and then enters the low-pressure channel from one end of the low-pressure channel, thereby improving the heat exchange efficiency and heat utilization rate.

[0049] Reference Figure 3 and 4 In order to ensure that the low-pressure gas is fully preheated before entering the low-pressure channel, the present embodiment further includes an air distribution member 4, which is located in the preheating chamber and between the low-pressure channel and the low-pressure inlet 13. After the low-pressure gas enters the low-pressure inlet, it is distributed in the preheating chamber under the action of the air distribution member, thereby preventing the unpreheated low-pressure gas from directly entering the low-pressure channel.

[0050] In the specific design of the gas distribution member, the gas distribution member 4 has a cup-shaped structure with a middle portion protruding toward the cylinder cover, which facilitates the distribution of the low-pressure gas entering the preheating chamber.

[0051] In a further specific design, the low-pressure channel extends into the cup-shaped structure away from one end of the low-pressure outlet 14, further preventing the low-pressure gas entering the preheating chamber from directly entering the low-pressure channel. The air distribution part is covered on the outside of the air inlet end of the low-pressure channel, so that the entering low-pressure gas fills the preheating chamber before entering the preheating channel.

[0052] In other specific embodiments of the gas separation tube, the high-pressure channel includes a plurality of high-pressure flow paths extending from the high-pressure inlet to the high-pressure outlet, and the plurality of high-pressure flow paths are distributed around the inner tube body; so that the plurality of high-pressure flow paths are distributed in the circumferential direction of the low-pressure channel to ensure the circumferential heat exchange effect.

[0053] Reference Figure 5 In order to prevent the high-pressure channel from deforming and causing position deviation around the low-pressure channel when the inner tube body and the outer tube body are jointly bent, in a specific setting, the inner wall of the outer tube body 3 is provided with a plurality of convex ribs 31 extending from the high-pressure inlet to the high-pressure outlet, and the plurality of convex ribs 31 are distributed around the inner tube body 2 and a high-pressure flow path is formed between two adjacent convex ribs 31. When the inner and outer tube bodies are bent, the convex ribs play a supporting role to ensure the circumferential gap between the inner and outer tubes.

[0054] Reference Figure 6 and 7In another specific design, the high-pressure channel extends spirally around the low-pressure channel. This arrangement can also increase the heat exchange area and heat exchange time between the low-pressure gas and the high-pressure gas; preferably, the outside of the inner tube body 2 is provided with an outer spiral groove extending around its outer wall, and the outer spiral groove forms the high-pressure channel between the inner tube body 2 and the outer tube body 3, thereby increasing the heat exchange area between the low-pressure channel and the high-pressure channel, thereby improving the heat exchange efficiency.

[0055] In order to further improve the heat exchange efficiency between the low-pressure channel and the high-pressure channel, the inner wall of the inner tube body 2 is provided with an inner spiral groove corresponding to the outer spiral groove, and the low-pressure gas forms a flow path along the inner spiral on the inner wall of the inner tube body.

[0056] In other specific designs of the inner tube body, the inner tube body 2 includes a heat exchange section and a preheating section which are connected in sequence, the preheating section is located at the end of the heat exchange section away from the low-pressure outlet 14, and the outer tube body 3 is sleeved on the outside of the heat exchange section; this facilitates the coordinated sleeve arrangement of the outer tube body and the inner tube body, and at the same time, allows the low-pressure gas to be further preheated in the inner tube body before heat exchange with the high-pressure gas.

[0057] In other specific embodiments, an oil filter nozzle 5 is provided at the drain hole, through which the liquid in the low-pressure channel is sucked out to improve the efficiency of gas-liquid separation; further, the oil filter nozzle is fixed on the inner wall of the outer cylinder, and the gas-liquid separation tube is fixed on the outer cylinder to prevent the gas-liquid separation tube from shaking with the flow of gas.

[0058] During the heat exchange process, the flow directions in the high-pressure channel and the low-pressure channel are opposite, so that the temperature gradient of the high-pressure flow path is distributed correspondingly to the temperature gradient of the low-pressure flow path, thereby improving the heat exchange efficiency between the two.

[0059] In addition, in the specific design of the cylinder cover, the cylinder cover can be designed as an integrated structure according to usage needs, with the four inlets and outlets all arranged on the same cover body, or the cylinder cover can be designed as two cover body structures, with the high-pressure inlet and the low-pressure outlet arranged on cover A, and the high-pressure outlet and the low-pressure inlet arranged on cover B.

[0060] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gas-liquid separator, characterized in that: include: An outer cylinder (1), a gas-liquid separation tube; The outer cylinder (1) comprises a cylinder body and a cylinder cover (10), and the cylinder cover (10) is provided with a high-pressure inlet (11), a high-pressure outlet (12), a low-pressure inlet (13), and a low-pressure outlet (14); The gas-liquid separation tube is located inside the outer tube (1), and comprises an inner tube body (2) and an outer tube body (3) sleeved outside the inner tube body (2). A low-pressure channel is formed inside the inner tube body (2), and a drainage hole is provided on the side wall of the low-pressure channel. The two ends of the low-pressure channel are respectively connected to a low-pressure inlet (13) and a low-pressure outlet (14). A high-pressure channel is formed between the outer tube body (3) and the inner tube body (2), and the two ends of the high-pressure channel are respectively connected to a high-pressure inlet (11) and a high-pressure outlet (12); A preheating chamber is formed between the inner wall of the outer cylinder (1) and the outer tube body (3), and the low-pressure passage is connected to the low-pressure inlet (13) through the preheating chamber; It also includes an air distribution member (4), which is located in the preheating chamber and between the low-pressure channel and the low-pressure inlet (13); The end of the low-pressure channel away from the low-pressure outlet (14) is located on a side of the air distribution member (4) away from the low-pressure inlet (13); The air distribution member (4) has a cup-shaped structure with a middle portion protruding toward the cylinder cover (10); One end of the low-pressure channel away from the low-pressure outlet (14) extends into the cup-shaped structure; The inner tube body (2) comprises a heat exchange section and a preheating section which are connected in sequence, the preheating section is located at an end of the heat exchange section away from the low-pressure outlet (14), the drainage hole is located on the side wall of the heat exchange section, and the outer tube body (3) is sleeved on the outside of the heat exchange section.

2. The gas-liquid separator according to claim 1, characterized in that: An oil filter nozzle (5) is provided at the drainage hole; the inner tube body (2) is fixedly connected to the inner wall of the outer tube (1) via the oil filter nozzle (5).

3. The gas-liquid separator according to claim 2, characterized in that: The high-pressure passage includes a plurality of high-pressure flow paths extending from the high-pressure inlet to the high-pressure outlet, and the plurality of high-pressure flow paths are distributed around the inner tube body.

4. The gas-liquid separator according to claim 3, characterized in that: The inner wall of the outer tube body (3) is provided with a plurality of convex ribs (31) extending from the high-pressure inlet to the high-pressure outlet. The plurality of convex ribs (31) are distributed around the inner tube body (2) and a high-pressure flow path is formed between two adjacent convex ribs (31).

5. The gas-liquid separator according to claim 4, characterized in that: The high-pressure channel extends spirally around the low-pressure channel; The inner tube body (2) is provided with an outer spiral groove extending around its outer wall, and the outer spiral groove forms the high-pressure channel between the inner tube body (2) and the outer tube body (3); The inner wall of the inner tube body (2) is provided with an inner spiral groove corresponding to the outer spiral groove.

6. An air conditioning system, characterized in that: Comprising a gas-liquid separator (100) according to any one of claims 1 to 5; It also includes an evaporator (200), a compressor (300), and a condenser (400); The evaporator (200) is provided with a first external high-pressure inlet and an external low-pressure outlet, the compressor (300) is provided with an external low-pressure inlet and a first external high-pressure outlet, and the condenser (400) is provided with a second external high-pressure inlet and a second external high-pressure outlet; The external low-pressure outlet is communicated with the low-pressure inlet, the low-pressure outlet is communicated with the external low-pressure inlet, the first external high-pressure outlet is communicated with the second external high-pressure inlet, the second external high-pressure outlet is communicated with the high-pressure inlet, and the high-pressure outlet is communicated with the first external high-pressure inlet.

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