Horizontal gas-liquid separator special for transcritical carbon dioxide air source heat pump

Abstract

The utility model belongs to the technical field of separators, and particularly relates to a horizontal gas-liquid separator special for a transcritical carbon dioxide air source heat pump, which comprises a separator barrel, end covers are respectively arranged at two ends of the separator barrel, a vertical refrigerant inlet pipe is arranged at the right end of the separator barrel, and the lower end of the refrigerant inlet pipe extends into the separator barrel. A spoiler is arranged below the refrigerant inlet pipe and connected with the top wall of the separator barrel, a refrigerant outlet pipe is arranged at the left end of the separator barrel, the lower end of the refrigerant outlet pipe extends into the separator barrel and is bent into a U shape, and an oil return hole is formed in the bottom of the end, bent into the U shape, of the refrigerant outlet pipe. And after the oil accumulated at the bottom of the separator barrel is higher than the oil return hole and the bottom end of the secondary oil return pipe, the oil intermittently returns to the compressor through the oil return hole in the bottom of the refrigerant outlet pipe and the secondary oil return pipe. And meanwhile, the gas rises due to low density and directly returns to the compressor from the refrigerant outlet pipe, so that oil-gas separation is realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of separator, and specifically relates to a horizontal gas-liquid separator special for transcritical carbon dioxide air source heat pump. BACKGROUND

[0002] In the field of refrigeration and heat supply technology, transcritical carbon dioxide heat pump technology as a new type of high-efficiency combined cooling and heating technology has been widely concerned in recent years. The technology uses carbon dioxide as a working medium to realize refrigeration and heat supply functions through transcritical thermodynamic cycle. The working medium is compressed to a supercritical state and realizes temperature rise through adiabatic compression, and then releases heat at the heat load demand end. After the working medium releases heat and cools down, it is reduced to a low-temperature liquid state through adiabatic expansion. The low-temperature liquid working medium realizes refrigeration by evaporating and absorbing heat at the cold load demand end. In the transcritical carbon dioxide heat pump system, lubricating oil is easily mixed into the carbon dioxide refrigerant, which affects the refrigeration effect, and therefore, a gas-liquid separator needs to be designed. SUMMARY

[0003] Therefore, the utility model wants to solve the problem that lubricating oil is easily mixed into carbon dioxide refrigerant in the prior art, which affects the refrigeration effect.

[0004] To this end, the technical scheme adopted is that the utility model discloses a horizontal gas-liquid separator special for transcritical carbon dioxide air source heat pump, comprising: a separator cylinder, end covers are arranged at both ends of the separator cylinder, a vertical refrigerant inlet pipe is arranged at the right end of the separator cylinder, the lower end of the refrigerant inlet pipe extends into the separator cylinder, a spoiler is arranged below the refrigerant inlet pipe, the spoiler is connected with the top wall of the separator cylinder, a refrigerant outlet pipe is arranged at the left end of the separator cylinder, the lower end of the refrigerant outlet pipe extends into the separator cylinder and is bent into a U shape, and an oil return hole is arranged at the bottom of one end of the refrigerant outlet pipe bent into a U shape.

[0005] Preferably, a vertical secondary oil return pipe is arranged at the top end of the separator cylinder between the refrigerant inlet pipe and the refrigerant outlet pipe, and the lower end of the secondary oil return pipe extends to the bottom of the separator cylinder.

[0006] Preferably, the distance between the lower end of the secondary oil return pipe and the bottom wall of the separator cylinder is 1-3 mm.

[0007] Preferably, a filter screen is arranged on the oil return hole.

[0008] Preferably, the spoiler is composed of a vertical plate, an inclined plate and a horizontal plate connected in sequence, and the upper end of the vertical plate is connected with the top wall of the separator cylinder.

[0009] Preferably, a base is arranged at the bottom end of the separator cylinder.

[0010] Preferably, the separator cylinder and the end cover are connected through welding.

[0011] The utility model discloses technical scheme has the following advantages: oil gas mixture enters the separator cylinder after the refrigerant inlet pipe, because the cross section of flow increases suddenly and changes direction, the oil liquid after diffusion is disturbed by the spoiler and slides along the inner wall to the bottom of the separator cylinder by gravity, when the oil liquid amount gathered does not pass the oil return hole and the secondary oil return pipe bottom end height, through the oil return hole and secondary oil return pipe of refrigerant outlet pipe bottom intermittent return compressor.

[0012] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the present application. The objects and other advantages of the present application can be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

[0013] The technical scheme of the utility model will be further described in detail below with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and serve to explain the present application, and do not limit the present application. In the drawings:

[0015] Fig. 1 It is the structural schematic diagram of the utility model;

[0016] Fig. 2 It is the side view of the utility model;

[0017] Wherein, 1, separator cylinder;2, end cover;3, refrigerant inlet pipe;4, spoiler;5, refrigerant outlet pipe;6, oil return hole;7, secondary oil return pipe;8, filter screen;9, base;41, vertical plate;42, inclined plate;43, horizontal plate. DETAILED DESCRIPTION

[0018] In order to make the technical problem, technical scheme and beneficial effect of the utility model to be solved more clear and obvious, the utility model will be further described in detail below with the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model, and do not limit the utility model.

[0019] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to the other component.

[0020] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] This utility model provides a horizontal gas-liquid separator specifically for transcritical carbon dioxide air source heat pumps, such as... Figs. 1-2 As shown, it includes: a separator cylinder 1, with end caps 2 at both ends of the separator cylinder 1, a vertical refrigerant inlet pipe 3 at the right end of the separator cylinder 1, the lower end of the refrigerant inlet pipe 3 extending into the separator cylinder 1, a baffle 4 below the refrigerant inlet pipe 3, the baffle 4 being connected to the top wall of the separator cylinder 1, a refrigerant outlet pipe 5 at the left end of the separator cylinder 1, the lower end of the refrigerant outlet pipe 5 extending into the separator cylinder 1 and bent into a U-shape, and a return oil hole 6 at the bottom of the U-shaped end of the refrigerant outlet pipe 5.

[0023] A vertical secondary oil return pipe 7 is installed at the top of the separator cylinder 1, between the refrigerant inlet pipe 3 and the refrigerant outlet pipe 5. The lower end of the secondary oil return pipe 7 extends to the bottom of the separator cylinder 1 to return the lubricating oil at the bottom of the separator cylinder 1. The distance between the lower end of the secondary oil return pipe 7 and the bottom wall of the separator cylinder 1 is 1-3mm. When the liquid level reaches the lower end of the secondary oil return pipe 7, it will flow back to the compressor through the secondary oil return pipe 7. A filter screen 8 is installed on the oil return hole 6 to filter foreign objects or impurities. The baffle 4 is composed of a vertical plate 41, an inclined plate 42, and a horizontal plate 43 connected in sequence. The upper end of the vertical plate 41 is connected to the top wall of the separator cylinder 1, extending the oil settling path and improving separation efficiency. A base 9 is installed at the bottom of the separator cylinder 1 for more stable support. The separator cylinder 1 and the end cover 2 are connected by welding to improve sealing.

[0024] The working principle and beneficial technical effects of the above technical solution are: the compressor provides power, the oil-gas mixture enters the separator cylinder 1 through the refrigerant inlet pipe 3, due to the increase of the flow cross section, the gas flow rate suddenly decreases and changes direction, the diffused oil liquid is disturbed by the spoiler 4, then slides along the inner wall to the bottom of the separator cylinder 1 by gravity, when the amount of the accumulated oil liquid exceeds the height of the oil return hole 6 and the secondary oil return pipe 7, the oil liquid intermittently returns to the compressor through the oil return hole at the bottom of the refrigerant outlet pipe 5 and the secondary oil return pipe 7. At the same time, the gas rises due to the small density, directly returns to the compressor from the refrigerant outlet pipe 5, and realizes oil-gas separation.

[0025] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. A cross-critical carbon dioxide air source heat pump dedicated horizontal gas-liquid separator, characterized by, The application relates to a refrigerant separator. The separator cylinder (1) is provided with end covers (2) at both ends, a refrigerant inlet pipe (3) in the vertical direction is arranged at the right end of the separator cylinder (1), the lower end of the refrigerant inlet pipe (3) extends into the separator cylinder (1), a spoiler (4) is arranged below the refrigerant inlet pipe (3), the spoiler (4) is connected with the top wall of the separator cylinder (1), a refrigerant outlet pipe (5) is arranged at the left end of the separator cylinder (1), the lower end of the refrigerant outlet pipe (5) extends into the separator cylinder (1) and is bent into a U shape, and an oil return hole (6) is arranged at the bottom of one end of the refrigerant outlet pipe (5) which is bent into a U shape.

2. A cross-critical carbon dioxide air source heat pump dedicated horizontal gas-liquid separator according to claim 1, characterized in that, A secondary oil return pipe (7) in the vertical direction is arranged at the top end of the separator cylinder (1) between the refrigerant inlet pipe (3) and the refrigerant outlet pipe (5), and the lower end of the secondary oil return pipe (7) extends to the bottom of the separator cylinder (1).

3. A cross-critical carbon dioxide air source heat pump dedicated horizontal gas-liquid separator according to claim 2, characterized in that, The distance between the lower end of the secondary oil return pipe (7) and the bottom wall of the separator cylinder (1) is 1-3 mm.

4. A cross-critical carbon dioxide air source heat pump dedicated horizontal gas-liquid separator according to claim 1, characterized in that, A filter screen (8) is arranged on the oil return hole (6).

5. A cross-critical carbon dioxide air source heat pump dedicated horizontal gas-liquid separator according to claim 1, characterized in that, The spoiler (4) is composed of a vertical plate (41), an inclined plate (42) and a horizontal plate (43) which are connected in sequence, and the upper end of the vertical plate (41) is connected with the top wall of the separator cylinder (1).

6. A cross-critical carbon dioxide air source heat pump dedicated horizontal gas-liquid separator according to claim 1, characterized by, A base (9) is arranged at the bottom end of the separator cylinder (1).

7. A cross-critical carbon dioxide air source heat pump dedicated horizontal gas-liquid separator according to claim 1, characterized in that, The separator cylinder (1) and the end cover (2) are connected through welding.

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