Online detection device for carbon dioxide compressor

Abstract

The carbon dioxide compressor on-line detection device comprises a detected compressor, an air outlet of the detected compressor is communicated with an air inlet of an air cooler, a liquid outlet of the air cooler is communicated with a liquid inlet of a liquid storage device, and a liquid outlet of the liquid storage device is communicated with a first interface of a plate heat exchanger. A first expansion valve is arranged between a second interface and a third interface of the plate heat exchanger, a fourth interface of the plate heat exchanger is communicated with a liquid inlet of the evaporator, a gas outlet of the evaporator is communicated with a gas inlet of the gas-liquid separator, a gas outlet of the gas-liquid separator is communicated with a gas inlet of the tested compressor, and a carbon dioxide gas source is communicated with the gas inlet of the gas-liquid separator; the air inlet of the constant-pressure container is communicated with the air outlet of the tested compressor, and the air outlet of the constant-pressure container is communicated with the air inlet of the tested compressor. When the compressor is detected, the refrigeration cycle is closed through the stop valve, the compressor can be detected, after detection is completed, the refrigeration cycle is restarted through the stop valve, the compressor can operate normally, and the detection efficiency of the compressor is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressor detection, and in particular relates to an online detection device for a carbon dioxide compressor. Background Art

[0002] Carbon dioxide compressors are widely used in industrial and commercial fields, especially in the refrigeration, heating, air-conditioning and other industries, where they play a vital role. The main function of this compressor is to compress carbon dioxide gas into high-pressure gas to meet its needs in various industrial applications. However, over time and under the influence of various external factors such as lightning and electromagnetic interference, the operating status and performance of the carbon dioxide compressor may change. At present, the monitoring and fault diagnosis of carbon dioxide compressors mostly rely on traditional offline detection methods. This method usually needs to be performed after the compressor is shut down, which is not only inefficient but also unable to monitor the working status of the compressor in real time, making it difficult to detect and deal with potential faults in a timely manner. This may not only lead to a decline in compressor performance, but may even cause serious safety accidents, resulting in significant economic losses to the company. Utility Model Content

[0003] Therefore, the utility model aims to solve the problem in the prior art that the carbon dioxide compressor needs to be tested offline and is inefficient.

[0004] To this end, the technical solution adopted is that the utility model provides an online detection device for a carbon dioxide compressor, including: a compressor to be tested, an air outlet of the compressor to be tested is connected to the air inlet of an air cooler, the liquid outlet of the air cooler is connected to the liquid inlet of a liquid reservoir, the liquid outlet of the liquid reservoir is connected to the first interface of a plate heat exchanger, a first expansion valve is provided between the second interface and the third interface of the plate heat exchanger, the fourth interface of the plate heat exchanger is connected to the liquid inlet of an evaporator, the air outlet of the evaporator is connected to the air inlet of an air-liquid separator, the air outlet of the air-liquid separator is connected to the air inlet of the compressor to be tested, a carbon dioxide gas source is connected to the air inlet of the air-liquid separator, the air inlet of a constant pressure container is connected to the air outlet of the compressor to be tested, and the air outlet of the constant pressure container is connected to the air inlet of the compressor to be tested.

[0005] Preferably, the air outlet of the tested compressor is connected to the air inlet of the oil mist filter, and the air outlet of the oil mist filter is connected to the air inlet of the air cooler and the air inlet of the constant pressure container respectively.

[0006] Preferably, the air inlet of the constant pressure container is provided with a first stop valve, and the air outlet of the constant pressure container is provided with a second stop valve.

[0007] Preferably, the air inlet of the buffer is connected to the carbon dioxide gas source, and the air outlet of the buffer is connected to the air inlet of the gas-liquid separator.

[0008] Preferably, a flow meter is provided on the pipeline connecting the air outlet of the buffer and the air inlet of the gas-liquid separator.

[0009] Preferably, a second expansion valve is provided on the connecting pipeline between the fourth interface of the plate heat exchanger and the liquid inlet of the evaporator.

[0010] Preferably, a first pressure relief valve is provided on the connecting pipeline between the air outlet of the tested compressor and the air inlet of the oil mist filter, and a second pressure relief valve is provided on the connecting pipeline between the air outlet of the oil mist filter and the air inlet of the air cooler.

[0011] Preferably, a pressure sensor is provided on the connecting pipeline between the carbon dioxide gas source and the buffer air inlet.

[0012] Preferably, a third stop valve is provided on the connecting pipeline between the air outlet of the oil mist filter and the air inlet of the air cooler.

[0013] The technical solution of the utility model has the following advantages: when inspecting the compressor, the refrigeration cycle is shut down by the stop valve, so that the compressor can be inspected. After the inspection is completed, the refrigeration cycle is restarted by the stop valve, and the compressor can operate normally, thereby improving the inspection efficiency of the compressor.

[0014] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be achieved and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0015] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Among them, 1. The compressor under test; 2. The air cooler; 3. The liquid receiver; 4. The plate heat exchanger; 5. The first expansion valve; 6. The evaporator; 7. The gas-liquid separator; 8. The carbon dioxide gas source; 9. The constant pressure container; 10. The oil mist filter; 11. The first stop valve; 12. The second stop valve; 13. The buffer; 14. The flow meter; 15. The second expansion valve; 16. The first pressure relief valve; 17. The second pressure relief valve; 18. The pressure sensor; 19. The third stop valve. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] 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.

[0021] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0023] The utility model provides an online detection device for a carbon dioxide compressor. Figure 1 As shown, it includes: a tested compressor 1, an air outlet of the tested compressor 1 is connected to the air inlet of the air cooler 2, a liquid outlet of the air cooler 2 is connected to the liquid inlet of the liquid reservoir 3, the liquid outlet of the liquid reservoir 3 is connected to the first interface of the plate heat exchanger 4, a first expansion valve 5 is provided between the second interface and the third interface of the plate heat exchanger 4, the fourth interface of the plate heat exchanger 4 is connected to the liquid inlet of the evaporator 6, the air outlet of the evaporator 6 is connected to the air inlet of the gas-liquid separator 7, the air outlet of the gas-liquid separator 7 is connected to the air inlet of the tested compressor 1, after the gas passes through the gas-liquid separator 7, the liquid in the gas remains in the liquid storage cavity of the gas-liquid separator 7, and the gas is discharged from the air outlet, the carbon dioxide gas source 8 is connected to the air inlet of the gas-liquid separator 7, the air inlet of the constant pressure container 9 is connected to the air outlet of the tested compressor 1, and the air outlet of the constant pressure container 9 is connected to the air inlet of the tested compressor 1.

[0024] The air outlet of the tested compressor 1 is connected to the air inlet of the oil mist filter 10, and the air outlet of the oil mist filter 10 is connected to the air inlet of the air cooler 2 and the air inlet of the constant pressure container 9 respectively. After the carbon dioxide gas is compressed by the compressor 1, lubricating oil will be mixed into the gas. The oil mist filter 10 is used to filter out the lubricating oil in the carbon dioxide gas. The air inlet of the constant pressure container 9 is provided with a first stop valve 11, and the air outlet of the constant pressure container 9 is provided with a second stop valve 12. The second stop valve 12 is used to open or close the air flow. The air inlet of the buffer 13 is connected to the carbon dioxide gas source 8, and the air outlet of the buffer 13 is connected to the air inlet of the gas-liquid separator 7. The buffer 13 is used to temporarily store the gas transported from the carbon dioxide gas source 8. The carbon dioxide is compressed as a refrigerant to meet the requirements of continuous gas supply. A flow meter 14 is provided on the pipeline connecting the air outlet of the buffer 13 and the air inlet of the gas-liquid separator 7 for real-time monitoring of the gas flow. A second expansion valve 15 is provided on the connecting pipeline between the fourth interface of the plate heat exchanger 4 and the liquid inlet of the evaporator 6 to reduce the pressure of the liquid. The plate heat exchanger 4 is used to cool the liquid. A first pressure relief valve 16 is provided on the connecting pipeline between the air outlet of the tested compressor 1 and the air inlet of the oil mist filter 10. A second pressure relief valve 17 is provided on the connecting pipeline between the air outlet of the oil mist filter 10 and the air inlet of the air cooler 2. When the air pressure exceeds the threshold of the safe air pressure, the first pressure relief valve 16 and the second pressure relief valve 17 will open to relieve the pressure and ensure that the air pressure is within the normal range. A pressure sensor 18 is provided on the connecting pipeline between the carbon dioxide gas source 8 and the air inlet of the buffer 13 to monitor the gas pressure value in real time. A third shut-off valve 19 is provided on the connecting pipeline between the air outlet of the oil mist filter 10 and the air inlet of the air cooler 2 to open or close the air flow channel.

[0025] The working principle and beneficial technical effects of the above technical solution are as follows: the first stop valve 11 and the second stop valve 12 are closed, the third stop valve 19 is started, the carbon dioxide gas source 8 buffers the carbon dioxide gas and separates the gas-liquid, and the dry gas enters the compressor 1 under test for compression. A small amount of lubricating oil will be mixed in the gas, which is filtered and deoiled by the oil mist filter 10. After that, the gas is cooled and liquefied by the air cooler 2 and enters the liquid reservoir 3 for storage, and then cooled by the heat exchanger 4. The second expansion valve 15 reduces the pressure and evaporates into a gaseous state by the evaporator 6. A small amount of water will be mixed in. The gas finally enters the gas-liquid separator 7 to separate the liquid, and then the dry carbon dioxide gas enters the compressor 1 under test to complete the refrigeration cycle. When it is necessary to detect the compressor, close the third stop valve 19 and the second stop valve 12, start the first stop valve 11, and cut off the refrigeration cycle. The carbon dioxide in the carbon dioxide gas source 8 first passes through the gas-liquid separator 7 to remove moisture, enters the tested compressor 1 for gas compression, and is filtered by the oil mist filter 10 before entering the constant pressure container 9 for storage. The operating status of the compressor is judged by whether the pressure change and the boost time parameters in the constant pressure container 9 are within the normal parameter range. When the pressure change and the boost time parameters are within the normal parameter range, the compressor is operating normally. Otherwise, the compressor is operating abnormally and the compressor needs to be repaired. Since the refrigeration cycle is closed by the stop valve when the compressor is detected, the compressor can be detected. After the detection is completed, the refrigeration cycle is restarted by the stop valve, and the compressor can operate normally, thereby improving the detection efficiency of the compressor.

[0026] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A carbon dioxide compressor online detection device, characterized in that: include: A compressor (1) under test, an air outlet of the compressor (1) under test is connected to an air inlet of an air cooler (2), a liquid outlet of the air cooler (2) is connected to a liquid inlet of a liquid reservoir (3), the liquid outlet of the liquid reservoir (3) is connected to a first interface of a plate heat exchanger (4), a first expansion valve (5) is provided between a second interface and a third interface of the plate heat exchanger (4), a fourth interface of the plate heat exchanger (4) is connected to a liquid inlet of an evaporator (6), an air outlet of the evaporator (6) is connected to an air inlet of a gas-liquid separator (7), an air outlet of the gas-liquid separator (7) is connected to an air inlet of the compressor (1) under test, a carbon dioxide gas source (8) is connected to an air inlet of the gas-liquid separator (7), an air inlet of a constant pressure container (9) is connected to an air outlet of the compressor (1) under test, and an air outlet of the constant pressure container (9) is connected to an air inlet of the compressor (1) under test.

2. A carbon dioxide compressor online detection device according to claim 1, characterized in that: The air outlet of the tested compressor (1) is connected to the air inlet of the oil mist filter (10), and the air outlet of the oil mist filter (10) is connected to the air inlet of the air cooler (2) and the air inlet of the constant pressure container (9) respectively.

3. The carbon dioxide compressor online detection device according to claim 1, characterized in that: The air inlet of the constant pressure container (9) is provided with a first stop valve (11), and the air outlet of the constant pressure container (9) is provided with a second stop valve (12).

4. The carbon dioxide compressor online detection device according to claim 1, characterized in that: The air inlet of the buffer (13) is communicated with the carbon dioxide gas source (8), and the air outlet of the buffer (13) is communicated with the air inlet of the gas-liquid separator (7).

5. The carbon dioxide compressor online detection device according to claim 4, characterized in that: A flow meter (14) is provided on the pipeline communicating between the air outlet of the buffer (13) and the air inlet of the gas-liquid separator (7).

6. The carbon dioxide compressor online detection device according to claim 1, characterized in that: A second expansion valve (15) is provided on the connecting pipeline between the fourth interface of the plate heat exchanger (4) and the liquid inlet of the evaporator (6).

7. The carbon dioxide compressor online detection device according to claim 2, characterized in that: A first pressure relief valve (16) is provided on a connecting pipeline between the air outlet of the tested compressor (1) and the air inlet of the oil mist filter (10), and a second pressure relief valve (17) is provided on a connecting pipeline between the air outlet of the oil mist filter (10) and the air inlet of the air cooler (2).

8. The carbon dioxide compressor online detection device according to claim 4, characterized in that: A pressure sensor (18) is provided on the connecting pipeline between the carbon dioxide gas source (8) and the air inlet of the buffer (13).

9. The carbon dioxide compressor online detection device according to claim 2, characterized in that: A third stop valve (19) is provided on the connecting pipeline between the air outlet of the oil mist filter (10) and the air inlet of the air cooler (2).

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