Oil-liquid separation container

Abstract

The utility model discloses an oil-liquid separation container, and relates to the technical field of refrigeration. The oil tank comprises a tank body, wherein a liquid inlet, a mesh screen, a liquid outlet and an oil outlet are sequentially arranged from the top to the bottom of the tank body; the inner space of the tank body is divided into an upper cavity where the liquid inlet is located and a lower cavity where the liquid outlet and the oil outlet are located by the mesh screen, and the working environment pressure in the tank body ranges from 2 MPa to 5 MPa. According to the oil-liquid separation device, certain working pressure is applied to the oil-liquid separation container to separate lubricating oil dissolved in refrigeration equipment with liquid CO2 as a medium, and the mesh screen is arranged in the oil-liquid separation container to perform final oil-liquid filtration.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration, in particular to an oil-liquid separation container using carbon dioxide as a refrigerant. Background Art

[0002] When carbon dioxide is used as a refrigerant, system pressures are extremely high. Its saturation pressure at 0°C is seven times higher than that of R22, and its suction and exhaust pressures are 10 MPa and 3 MPa higher, respectively. Furthermore, it exhibits exceptional solubility at supercritical pressures and exhibits its acidic nature in the presence of water. Under supercritical conditions, carbon dioxide is an effective solvent for various hydrocarbons. Because the exhaust gas from a carbon dioxide compressor is in a supercritical state, lubricant carryover will occur under all conditions due to the solubility of supercritical carbon dioxide. The lubricant provides effective power to the compressor within the system's operating conditions and temperature range without affecting the system's operational capabilities.

[0003] From the above characteristics of carbon dioxide and lubricating oil, it can be seen that the compressor lubricating oil and refrigerant must be miscible; otherwise, the lubricating oil will deposit in the heat exchanger to form an oil film, which will not only affect the heat exchange effect but also cause the compressor to lack oil, causing a series of problems. In addition, no matter what the circumstances, the carbon dioxide refrigeration compressor will produce lubricating oil carryover due to the solubility of supercritical carbon dioxide in the supercritical state. Therefore, in order to avoid hindering heat transfer, it is necessary to ensure that the lubricating oil can return to the compressor. This makes it necessary to achieve oil separation. Utility Model Content

[0004] The purpose of the utility model is to provide an oil-liquid separation container, which can realize the process of separating the lubricating oil dissolved in the refrigeration equipment with liquid CO2 as the medium by applying a certain working pressure in the oil-liquid separation container, thereby solving the problem that the lubricating oil dissolved in the refrigeration equipment with liquid CO2 as the medium cannot be separated.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The utility model is an oil-liquid separation container, comprising a tank body, on which a liquid inlet, a mesh screen, a liquid outlet and an oil outlet are sequentially arranged from the top to the bottom of the tank body; the mesh screen divides the internal space of the tank body into an upper chamber where the liquid inlet is located and a lower chamber where the liquid outlet and the oil outlet are located, and the working environment pressure inside the tank body is in the range of 2-5MPa.

[0007] Furthermore, an air outlet is provided on the top of the tank body.

[0008] Furthermore, the oil outlet is located at the bottom of the tank body.

[0009] Furthermore, an observation mirror for observing the position of the liquid inside the container is also provided on the peripheral side of the tank body.

[0010] Furthermore, a liquid level sensor is provided inside the tank body.

[0011] Furthermore, the working environment pressure inside the tank is in the range of 3-4 MPa.

[0012] The utility model has the following beneficial effects:

[0013] The utility model realizes the process of separating the lubricating oil dissolved in the refrigeration equipment with liquid CO2 as the medium by applying a certain working pressure in the oil-liquid separation container, and then performs the final oil filtration by arranging a mesh screen in the oil-liquid separation container.

[0014] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a structural schematic diagram of an oil-liquid separation container of this embodiment;

[0017] Figure 2 for Figure 1 Schematic diagram of the half-section structure;

[0018] Figure 3 Schematic diagram of the structure of the mesh screen;

[0019] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0020] 1-tank body, 101-liquid inlet, 102-liquid outlet, 103-air outlet, 104-oil outlet, 105-observation mirror, 106-mesh screen, 107-. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention / utility model, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Various tank containers utilize vertical separation vessels. The principle behind this separation is to rely on gravity to settle liquids or separate them from gases. In a gravity separator, when a droplet no longer accelerates, it descends at a steady rate, known as the terminal velocity. At this velocity, all forces acting on the droplet are in equilibrium: drag and buoyancy balance gravity. Liquid that does not fall to the bottom of the separation vessel resembles small, stationary droplets in a cloud in the sky. They remain suspended in the sky, not falling as raindrops, because their diameter is not large enough (they lack mass) to fall. Instead, they are held in place by the buoyancy of the air and not small enough to be evaporated by the sun or blown away by the wind. The diameter of these droplets is defined as the critical droplet diameter for the calculation of separation for a particular refrigerant. In a refrigeration system, as the temperature decreases, the mass of a refrigerant droplet of the same diameter increases (the lower the temperature, the higher the refrigerant density), and the droplet's upward velocity also increases. This increases the separation speed and, consequently, the separation capacity. This is why the separation capacity varies with decreasing evaporation temperature. Based on the above principles, a separation structure of the tank is designed to solve the problem of high-pressure and high-temperature liquid CO2 separation with lubricating oil.

[0023] like Figure 1 and Figure 2 As shown, this embodiment is an oil-liquid separation container, comprising a tank body 1 , wherein a liquid inlet 101 , a mesh 106 , a liquid outlet 102 and an oil outlet 104 are sequentially provided from the top to the bottom of the tank body 1 .

[0024] like Figure 3 As shown, the mesh 106 divides the internal space of the tank body 1 into an upper chamber where the liquid inlet 101 is located and a lower chamber where the liquid outlet 102 and the oil outlet 104 are located. The oil outlet 104 is located at the bottom of the tank body 1.

[0025] The aperture of the liquid outlet 102 is smaller than that of the liquid inlet 101, forming the principle of top-in and bottom-out of the tank.

[0026] Low-temperature, low-pressure liquid CO2 with lubricating oil enters through the liquid inlet 101, passes through the mesh screen 106 located inside the tank body 1, and is output to the refrigeration or heating equipment end through the liquid outlet 102. The separated lubricating oil flows out through the oil outlet 104, and the outflow end can be an oil storage tank or an oil pipeline.

[0027] Among them, an air outlet 103 is also provided on the top of the tank body 1. The function of the air outlet 103 is to adjust the pressure inside the tank body 1, keeping the pressure inside the tank body 1 lower than the pressure of the liquid inlet 101 and higher than the pressure of the liquid outlet 102.

[0028] An observation mirror 105 for observing the position of the liquid CO2 inside the container is also provided on the side of the tank body 1. An observation mirror 105 is provided in the upper chamber and the lower chamber respectively. The observation mirror 105 uses a refracting surface of a prism.

[0029] A liquid level sensor is also provided inside the tank body 1. The liquid level sensor is installed at the position of the observation mirror 105 and is used to detect the displacement of the tank container in real time. If it is lower than the lowest position, it continues to move forward, and if it is higher than the highest position, it stops moving forward.

[0030] The operating pressure inside the tank 1 is in the range of 2-5 MPa, preferably 3-4 MPa. Under this pressure, the liquid CO2 inside the tank 1 separates the oil through the mesh 106 and flows out through the oil outlet 104. The oil outlet 104 is located at the bottom center of the tank 1. The separated lubricating oil enters the oil storage pipe and then returns to the compressor.

[0031] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0032] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An oil-liquid separation container, characterized in that: It comprises a tank body (1), wherein a liquid inlet (101), a mesh screen (106), a liquid outlet (102) and an oil outlet (104) are sequentially arranged from the top to the bottom of the tank body (1); The mesh screen (106) divides the internal space of the tank body (1) into an upper chamber where the liquid inlet (101) is located and a lower chamber where the liquid outlet (102) and the oil outlet (104) are located; The working environment pressure inside the tank body (1) is in the range of 2-5 MPa.

2. The oil-liquid separation container according to claim 1, characterized in that: The top of the tank body (1) is also provided with an air outlet (103).

3. The oil-liquid separation container according to claim 1, characterized in that: The oil outlet (104) is located at the bottom of the tank body (1).

4. The oil-liquid separation container according to claim 1, characterized in that: An observation mirror (105) for observing the position of the liquid inside the container is also provided on the peripheral side of the tank body (1).

5. The oil-liquid separation container according to claim 1, characterized in that: A liquid level sensor is also provided inside the tank body (1).

6. The oil-liquid separation container according to claim 1, characterized in that: The working environment pressure inside the tank (1) is in the range of 3-4 MPa.

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