Apparatus for determining compatibility of actual solution lubricating oil with refrigerant

Abstract

The application discloses a device for determining the compatibility of actual solution lubricating oil and refrigerant, which comprises a device outer wall, a refrigerant inlet pipe, a refrigerant flow meter, a lubricating oil inlet pipe, a pressure gauge, a thermometer, a safety valve, a gas release hole, a halogen leak detector, a sight glass, a liquid outlet and a differential pressure transmitter. The top of the device outer wall is connected with the pressure gauge, the thermometer, the safety valve, the gas release hole and the halogen leak detector, and a valve is arranged in front of the gas release hole and the halogen leak detector. The liquid outlet is connected with the bottom of the device outer wall and is provided with a valve. A plurality of sight glasses are arranged in parallel on one side of the device outer wall, the lowest sight glass is in the same height as the zero liquid level, and the highest sight glass is in the same height as the highest liquid level. The lubricating oil inlet pipe is inserted into the shell from the top of one side of the device outer wall, and lubricating oil can enter the shell through the lubricating oil inlet pipe. The refrigerant inlet pipe is inserted into the shell from the middle and lower part of the other side of the device outer wall, and refrigerant can enter the shell through the refrigerant inlet pipe. The refrigerant flow meter is arranged on the outer part of the refrigerant inlet pipe shell. The device has the advantages of simple structure, convenient operation, convenient observation, high safety and high testing precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of test experimental devices, in particular to a device for measuring the compatibility of actual solution lubricating oil and refrigerant. BACKGROUND

[0002] The compatibility of lubricating oil and refrigerant is an important characteristic of refrigeration working medium. Different refrigerants require specific lubricating oil matching, and mismatched refrigerant and lubricating oil will reduce the lubricating oil viscosity, cause the lubricating surface oil film to be too thin or not to form an oil film, and affect the lubricating effect. Under the current background of energy saving and emission reduction, the situation of refrigerant replacement is becoming increasingly severe, and the research on refrigeration lubricating oil matching refrigerant is also attracting more and more attention. At the same time, a reasonable compatibility determination device is also essential.

[0003] The existing lubricating oil and refrigerant compatibility determination device has the following shortcomings in actual use: the existing experimental device has low efficiency in testing the compatibility of lubricating oil and refrigerant after mixing; most of the existing experimental devices do not quantitatively add refrigerant, resulting in low test accuracy; and the existing experimental device cannot accurately measure the liquid level of lubricating oil and refrigerant after mixing.

[0004] INVENTION

[0005] The purpose of the present application is to solve the problems in the prior art, and to provide a device for measuring the compatibility of actual solution lubricating oil and refrigerant, which is simple in structure, convenient to operate, convenient to observe, safe and high in test precision.

[0006] To achieve the above-mentioned purpose, the present application provides a device for measuring the compatibility of actual solution lubricating oil and refrigerant, which comprises a device outer wall, a refrigerant inlet pipe, a refrigerant flowmeter, a lubricating oil inlet pipe, a pressure gauge, a thermometer, a safety valve, a gas vent, a halogen leak detector, a sight glass, a liquid outlet, and a differential pressure transmitter. The top of the device outer wall is connected with the pressure gauge, the thermometer, the safety valve, the gas vent and the halogen leak detector, and a valve is arranged in front of the gas vent and the halogen leak detector. The liquid outlet is connected with the bottom of the device outer wall and is provided with a valve. A plurality of sight glasses are installed in the same row on one side of the device outer wall, the lowest sight glass is at the same height as the zero liquid level, and the highest sight glass is at the same height as the highest liquid level. The lubricating oil inlet pipe is inserted into the shell from the top of one side of the device outer wall, and the lubricating oil can enter the shell through the lubricating oil inlet pipe. The refrigerant inlet pipe is inserted into the shell from the middle and lower part of the other side of the device outer wall, and the refrigerant can enter the shell through the refrigerant inlet pipe. The refrigerant flowmeter is installed outside the refrigerant inlet pipe shell.

[0007] As a preferred embodiment, the device can calculate the vapor pressure by using Raoult's law to judge the deviation of the actual solution from the ideal solution.

[0008] As preferred, the lubricating oil first spreads on the bottom of the device, and the refrigerant entering the pipe shell adopts a porous structure, which is convenient for uniform mixing.

[0009] As preferred, a refrigerant flow meter is arranged to quantitatively add the refrigerant.

[0010] As preferred, the device shell is arranged in an eggshell type.

[0011] As preferred, a liquid level detection device is arranged, the positive and negative pressure chambers of the differential pressure transmitter are respectively connected with the pressure taking points at the lower and upper parts of the outer wall of the device, and the positive pressure chamber is kept at the same height as the zero liquid level, and valves are respectively arranged on the pipes of the positive and negative pressure chambers.

[0012] As preferred, a plurality of sight glasses are further arranged and are arranged in a flush and parallel column on one side of the outer wall of the device.

[0013] As preferred, a gas vent and a halogen leak detector are further arranged, and the halogen leak detector immediately closes the gas vent when refrigerant leakage is detected.

[0014] The beneficial effects of the present application are as follows: the present application respectively arranges a lubricating oil entering pipe and a refrigerant entering pipe, and the two fluids are mixed in the shell, so that the purpose of determining the compatibility of the actual solution lubricating oil and the refrigerant is achieved. The present application arranges a pressure gauge and a thermometer, and the deviation between the actual solution and the ideal solution can be obtained from the instrument for data analysis, which is simple and fast. The porous structure at the tail of the refrigerant entering pipe is convenient for full contact with the lubricating oil and uniform mixing. The device is arranged as an eggshell type and is resistant to high pressure. The device is arranged with two liquid level monitoring methods, i.e. the sight glass viewing and the differential pressure transmitter monitoring, which reduces the experimental difficulty, facilitates the experiment, can more clearly understand the experiment, and also provides a double protection for the liquid level monitoring. The refrigerant flow meter is arranged to quantitatively add the refrigerant, which increases the test accuracy. The arrangement of the gas vent can ensure that the fluid smoothly enters the device and is compatible, and the halogen detector increases the safety. The structure of the present application is simple.

[0015] The features and advantages of the present application will be described in detail in conjunction with the embodiments and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of a device for determining the compatibility of an actual solution lubricating oil and a refrigerant according to the present application. DETAILED DESCRIPTION

[0017] Figure 1 is a structural schematic diagram of a device for determining the compatibility of an actual solution lubricating oil and a refrigerant according to the present application.

[0018] The application discloses a device for determining the compatibility of actual solution lubricating oil and refrigerant, which comprises a device outer wall 1, a refrigerant inlet pipe 2, a refrigerant flow meter 3, a lubricating oil inlet pipe 4, a pressure gauge 5, a thermometer 6, a safety valve 7, a gas vent 8, a halogen leak detector 9, a sight glass 10, a liquid outlet 11 and a differential pressure transmitter 12. The top of the device outer wall 1 is connected with the pressure gauge 5, the thermometer 6, the safety valve 7, the gas vent 8 and the halogen leak detector 9, the gas vent 8 is provided with a valve in front of the halogen leak detector 9, and the halogen leak detector 9 is immediately closed when refrigerant leakage is detected. The liquid outlet 11 is arranged at the bottom of the device outer wall 1, and the liquid outlet 11 is provided with a valve in front of the liquid outlet 11; a plurality of sight glasses 10 are arranged on one side of the device outer wall 1, the lowest sight glass is in the same height as the zero liquid level, and the highest sight glass is in the same height as the highest liquid level; the lubricating oil inlet pipe 4 is inserted into the inside of the device outer wall 1 from the top of one side of the device outer wall 1, and the lubricating oil can enter the inside of the device outer wall 1 through the lubricating oil inlet pipe 4; the refrigerant inlet pipe 2 is inserted into the inside of the device outer wall 1 from the middle and lower part of the other side of the device outer wall 1, and the refrigerant can enter the inside of the device outer wall 1 through the refrigerant inlet pipe 2; the refrigerant flow meter 3 is arranged on the refrigerant inlet pipe 2 and located outside the device outer wall 1. The device can determine the deviation between the actual solution and the ideal solution by calculating the vapor pressure obtained by using the Raoult law. The lubricating oil is first spread on the bottom of the device, the refrigerant inlet pipe shell is provided with a porous structure, and the refrigerant can be uniformly mixed. The refrigerant flow meter is arranged to quantitatively add the refrigerant.

[0019] When the device is used, the valves in front of the gas vent 8 and the halogen leak detector 9 are opened, the valve on the liquid outlet 11 is closed, the lubricating oil enters the device through the lubricating oil inlet pipe 4, spreads on the bottom of the device, covers the porous structure in the refrigerant inlet pipe 2 shell, the refrigerant enters the device through the refrigerant inlet pipe 2, fully contacts with the lubricating oil and is uniformly mixed, the refrigerant flow meter 3 can measure the refrigerant entering amount and control. When the halogen leak detector 9 detects the refrigerant, the valves in front of the gas vent 8 and the halogen leak detector 9 are closed. During the compatibility process, the multiple sight glasses 10 arranged on the side of the device outer wall in the same row or the positive pressure chamber and the negative pressure chamber are respectively connected with the pressure taking points at the lower part and the upper part of the device outer wall, the liquid level is observed by the differential pressure transmitter 12 which is in the same height as the zero liquid level, and the pressure gauge 5 and the thermometer 6 data are recorded according to requirements. After the device is used, the valve on the liquid outlet 11 is opened, and the device is disposed.

[0020] The above examples are used to illustrate the application, and are not used to limit the application, and any simple transformation of the application also belongs to the protection range of the application.

Claims

1. An apparatus for determining the compatibility of lubricating oil and refrigerant in a real solution, characterized in that: The device comprises a device outer wall (1), a refrigerant inlet pipe (2), a refrigerant flow meter (3), a lubricating oil inlet pipe (4), a pressure gauge (5), a thermometer (6), a safety valve (7), a gas vent (8), a halogen leak detector (9), and a liquid outlet (11). The top of the device outer wall (1) is provided with the pressure gauge (5), the thermometer (6), the safety valve (7), the gas vent (8), and the halogen leak detector (9). The gas vent (8) and the halogen leak detector (9) are provided with valves in front. The liquid outlet (11) is arranged at the bottom of the device outer wall (1) and is provided with a valve in front. A plurality of sight glasses (10) are arranged on one side of the device outer wall (1). The lowest sight glass is at the same height as the zero liquid level, and the highest sight glass is at the same height as the highest liquid level. The lubricating oil inlet pipe (4) is inserted into the inside of the device outer wall (1) from the top of one side of the device outer wall (1). Lubricating oil can enter the inside of the device outer wall (1) through the lubricating oil inlet pipe (4). The refrigerant inlet pipe (2) is inserted into the inside of the device outer wall (1) from the middle and lower part of the other side of the device outer wall (1). Refrigerant can enter the inside of the device outer wall (1) through the refrigerant inlet pipe (2). The refrigerant flow meter (3) is installed on the refrigerant inlet pipe (2) and is located outside the device outer wall (1). The inside of the refrigerant inlet pipe (2) shell is provided with a porous structure. The device outer wall (1) is in the shape of an eggshell. The device further comprises a differential pressure transmitter (12). The positive and negative pressure chambers of the differential pressure transmitter (12) are respectively connected to the lower and upper pressure points of the device outer wall (1) and are at the same height as the zero liquid level. Valves are arranged on the pipes of the positive and negative pressure chambers.

2. A device for determining the compatibility of a refrigerant with a lubricant as claimed in claim 1 wherein: The device further comprises a plurality of sight glasses (10). All the sight glasses (10) are vertically arranged on one side of the device outer wall (1).

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