Compressor on-line detection device and compressor on-line detection method

Abstract

The present application relates to compressor online detection technical field, provide a kind of compressor online detection equipment and compressor online detection method.The compressor online detection equipment includes: stabilized power supply, with the compressor to be measured is connected;Suction stabilized component is connected in the suction pipeline of the compressor to be measured, for adjusting the suction pressure of the compressor to be measured;Exhaust stabilized component is connected in the exhaust pipeline of the compressor to be measured, for adjusting the exhaust pressure of the compressor to be measured, so that the compressor to be measured has exhaust pressure constant load operating phase;And acquisition device, with the compressor to be measured is connected, for acquiring the operating parameter of the compressor to be measured in the load operating phase.The present application can realize the flexible, stable, accurate detection of the operating parameter of the compressor to be measured, meet the test demand of the compressor to be measured.

Description

Technical Field

[0001] This invention relates to the field of compressor online testing technology, and more specifically, to a compressor online testing device and a compressor online testing method. Background Technology

[0002] Before a compressor is put into use, it needs to undergo energy efficiency testing. Traditional testing equipment often uses a pressure-type load test machine to test operating parameters such as low-voltage start-up current, low-voltage operating current, pressure test current, pressure test power, pressure time, and pressure. However, traditional testing equipment cannot effectively control the voltage, suction pressure, and discharge pressure under the test conditions, ultimately failing to meet the compressor's energy efficiency testing requirements.

[0003] Specifically, on the one hand, the voltage input of traditional testing equipment is industrial electricity input from factories, which is subject to fluctuations and interference, and cannot adapt to the different voltage requirements of different models.

[0004] On the other hand, traditional testing equipment cannot stably control the suction and discharge pressures under test conditions, leading to inaccurate collection of compressor electrical parameters and affecting test results. Furthermore, traditional testing equipment is not easy to achieve high pressure setpoints, failing to meet the requirements for full-scale compressor energy efficiency testing.

[0005] On the other hand, traditional testing equipment measures compressor electrical parameters under pressure, which leads to large fluctuations in these parameters and unstable data, resulting in inaccurate test results. Another part of the equipment samples the compressor at the moment the pressure reaches the set value; however, the short sampling time limits the sampling accuracy, leading to significant errors in the final test results.

[0006] Reference Figure 1 The schematic diagram of the test operation of the traditional testing equipment shown illustrates that the compressor is first started through the balancing operation phase 101, then pressurized through the pressurization operation phase 102. Once the pressure reaches the set value 102', it immediately enters the depressurization phase 103, completing one test cycle. Regardless of whether data sampling is selected during the pressurization operation phase 102 or at the instant the pressure reaches the set value 102', the lack of a constant test condition results in insufficient accuracy of the collected data, affecting the test results.

[0007] It is evident that traditional testing equipment cannot meet the energy efficiency testing requirements of compressors. As product energy efficiency management increasingly becomes a quality indicator and requirement in the air conditioning industry, there is an urgent need for testing equipment that can achieve flexible, stable, and accurate testing.

[0008] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0009] To address the problems in the existing technology, this invention provides an online compressor testing device and a method for online compressor testing, which can achieve flexible, stable, and accurate testing and meet the testing requirements for compressor energy efficiency.

[0010] According to one aspect of the present invention, an online compressor testing device is provided, comprising: a regulated power supply connected to the compressor under test; a suction pressure regulating component connected to the suction line of the compressor under test for adjusting the suction pressure of the compressor under test; a discharge pressure regulating component connected to the discharge line of the compressor under test for adjusting the discharge pressure of the compressor under test, so that the compressor under test has a load operation phase with constant discharge pressure; and a data acquisition device connected to the compressor under test for acquiring the operating parameters of the compressor under test during the load operation phase.

[0011] In some embodiments, the suction pressure stabilizing assembly includes: a suction pressure sensor connected to the suction end of the compressor under test for detecting the suction pressure of the compressor under test; and a suction pressure regulating valve located upstream of the suction pressure sensor for adjusting the suction pressure based on the detection of the suction pressure sensor.

[0012] In some embodiments, the inhalation pressure stabilizing assembly further includes a pressure reducing valve disposed at the inlet end of the inhalation pipeline and upstream of the inhalation pressure regulating valve. The pressure reducing valve is used to regulate the air source pressure delivered to the inhalation pipeline. The pressure reducing valve is also communicatively connected to the inhalation pressure sensor to adjust the air source pressure according to the detection of the inhalation pressure sensor.

[0013] In some embodiments, the intake pressure regulating assembly further includes a buffer storage device disposed between the pressure reducing valve and the intake pressure regulating valve, the buffer storage device being used to regulate the gas flow rate in the intake pipeline.

[0014] In some embodiments, the intake pressure stabilizing assembly further includes: a low-pressure control device disposed at the inlet end of the intake pipeline and upstream of the pressure reducing valve, the low-pressure control device being used to issue an alarm when the gas source pressure is less than a minimum threshold; and a filter disposed between the intake pressure sensor and the intake end of the compressor under test, for filtering the intake gas of the compressor under test.

[0015] In some embodiments, the exhaust pressure stabilizing assembly includes: an exhaust pressure sensor connected to the exhaust end of the compressor under test and located in the main line of the exhaust pipeline, the exhaust pressure sensor being used to detect the exhaust pressure of the compressor under test; and a back pressure valve located downstream of the exhaust pressure sensor and in the pressure stabilizing branch of the exhaust pipeline, the back pressure valve being used to adjust the exhaust pressure according to the detection of the exhaust pressure sensor.

[0016] In some embodiments, the exhaust pressure stabilizing assembly further includes multiple sets of pressure boosting devices located downstream of the exhaust pressure sensor and in the main road, each set of pressure boosting devices including a pressure boosting tank and a pressure boosting valve.

[0017] In some embodiments, the exhaust pressure stabilizing assembly further includes at least one pressure relief valve located downstream of the booster device, each of the pressure relief valves being located in a pressure relief branch of the exhaust pipeline, the pressure relief branch being connected in parallel with the pressure stabilizing branch.

[0018] In some embodiments, the exhaust pressure stabilizing assembly further includes: a temperature control device connected to the exhaust end of the compressor under test and located upstream of the exhaust pressure sensor, the temperature control device being used to issue an alarm when the exhaust temperature of the compressor under test exceeds a maximum temperature threshold; and a high-pressure control device disposed between the temperature control device and the exhaust pressure sensor, the high-pressure control device being used to issue an alarm when the exhaust pressure exceeds a maximum pressure threshold.

[0019] In some embodiments, the acquisition device includes: an intake detection device connected to the intake end of the compressor under test, for detecting and acquiring the intake parameters of the compressor under test; an exhaust detection device connected to the exhaust end of the compressor under test, for detecting and acquiring the exhaust parameters of the compressor under test; and a calculation device for obtaining the detection result of the compressor under test based on the intake parameters and the exhaust parameters.

[0020] According to another aspect of the present invention, an online compressor testing method is provided, based on the online compressor testing device described in any of the above embodiments. The online compressor testing method includes: outputting a predetermined voltage to the compressor under test through the regulated power supply; adjusting the suction pressure of the compressor under test to a preset suction pressure value through the suction pressure stabilizing component; adjusting the discharge pressure of the compressor under test to a preset discharge pressure value through the discharge pressure stabilizing component, so that the compressor under test enters a load operation stage with constant discharge pressure; and acquiring multiple sets of operating parameters of the compressor under test during the load operation stage through the acquisition device to obtain the testing result of the compressor under test.

[0021] The beneficial effects of this invention compared to the prior art include at least the following:

[0022] By using a regulated power supply, a suitable and stable voltage can be output for the specific compressor model under test, enabling controllable power supply, purifying the power input, and preventing interference from power grid fluctuations.

[0023] The suction pressure of the compressor under test is adjusted by the suction pressure stabilizing component to keep the suction pressure stable, so that the operating parameters of the compressor under test remain stable and accurate during the load operation phase.

[0024] By adjusting the exhaust pressure of the compressor under test through the exhaust pressure stabilizing component, the compressor under test can maintain a constant exhaust pressure according to the test requirements. Thus, the acquisition device can collect the operating parameters of the compressor under test during the load operation phase. The sampling time is long, the sampling data is sufficient, and the collected operating parameters are stable and accurate, meeting the test requirements of the compressor under test.

[0025] Therefore, the present invention can achieve flexible, stable and accurate detection of the operating parameters of the compressor under test, and meet the energy efficiency testing requirements of the compressor under test.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0028] Figure 1 This diagram illustrates the testing conditions of a traditional testing device.

[0029] Figure 2 This diagram shows a structural block diagram of the compressor online testing device in an embodiment of the present invention.

[0030] Figure 3 The diagram shows the piping of the compressor online monitoring device in an embodiment of the present invention;

[0031] Figure 4 This diagram illustrates the test conditions of the compressor online testing device in an embodiment of the present invention.

[0032] Figure 5 This diagram illustrates the control schematic for the load operation phase in an embodiment of the present invention; and

[0033] Figure 6 The diagram illustrates the steps of the online compressor detection method in an embodiment of the present invention. Detailed Implementation

[0034] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0035] Figure 2 The diagram shows the structural block diagram of the main components of the compressor online testing device in the embodiment. (Refer to...) Figure 2 As shown, the compressor online testing device in this embodiment mainly includes: a regulated power supply 11, connected to the compressor under test 2; a suction pressure regulating component 12, connected to the suction pipe P1 of the compressor under test 2, used to regulate the suction pressure of the compressor under test 2; a discharge pressure regulating component 13, connected to the discharge pipe P2 of the compressor under test 2, used to regulate the discharge pressure of the compressor under test 2, so that the compressor under test 2 has a load operation stage with constant discharge pressure; and a data acquisition device 14, connected to the compressor under test 2, used to acquire the operating parameters of the compressor under test 2 during the load operation stage.

[0036] A stable voltage input is the first essential element for accurately detecting the operating parameters of the compressor under test. Traditional testing equipment uses industrial power input and a voltage regulator to servo-adjust the output, which suffers from poor stability and is prone to voltage drop fluctuations during testing. This embodiment uses a regulated power supply 11 to output a suitable and stable voltage for the compressor under test 2. The regulated power supply 11 has power frequencies including 50Hz and 60Hz, single-phase and three-phase power, and can adapt to various models such as constant speed, variable frequency, and three-phase. The regulated power supply 11 can purify the primary side power supply fluctuations, is protected from grid fluctuations and external interference, and has high control precision, which is conducive to achieving constant load operation.

[0037] Stable intake and exhaust pressures are the second essential element for maintaining constant load operation and accurately detecting the operating parameters of the compressor under test. Traditional testing equipment only uses a single valve at the air source inlet to adjust the air source pressure entering the intake pipeline, which cannot control situations such as pressure drop or unstable intake pressure during the test. In this embodiment, the intake pressure regulating component 12 is used to regulate the intake pressure of the compressor under test 2, keeping the intake pressure stable. This helps to create a continuous and constant pressure operating condition, enabling the compressor under test 2 to maintain a constant load operation.

[0038] Furthermore, traditional testing equipment releases pressure once the compressor discharge pressure reaches a set value, lacking a continuous and constant pressure condition to maintain stable operating parameters. This embodiment adjusts the discharge pressure of the compressor under test (CUT2) using the discharge pressure stabilizing component 13, ensuring a constant discharge pressure as required by the test, thus achieving the pressure conditions required during load operation. The adjustable and controllable intake and discharge pressures of CUT2 allow for adjustments to the pressure ratio as needed based on different testing requirements, with a wide pressure adjustment range. This enables CUT2 to maintain stable operation during load operation for a sufficient sampling time.

[0039] The acquisition and calculation of operating parameters during the load operation phase with constant exhaust pressure is the third essential element for accurate testing of the compressor under test (2). Traditional testing equipment samples the compressor at the instant its exhaust pressure reaches the set value, resulting in single-source data with poor consistency and accuracy, leading to significant errors in the test results. This embodiment, while maintaining a constant exhaust pressure on the compressor under test (2), acquires its operating parameters during the load operation phase. The sampling time is long, the data is sufficient, and the acquired operating parameters are stable and accurate, meeting the testing requirements of the compressor under test. This embodiment can obtain multiple sets of test data through multiple sampling and integration methods, achieving full energy efficiency testing of the compressor under test (2).

[0040] Thus, the compressor online testing equipment in the above embodiment, through the regulated power supply 11, the intake pressure stabilizing component 12, the exhaust pressure stabilizing component 13 and the acquisition device 14, realizes flexible, stable and accurate detection of the operating parameters of the compressor under test 2, and meets the energy efficiency testing requirements of the compressor under test 2.

[0041] In some embodiments, such as Figure 2 As shown, the main components of the suction pressure stabilizing assembly 12 that control, regulate, and stabilize the suction pressure include: a suction pressure sensor 121, connected to the suction end 2a of the compressor under test 2, used to detect the suction pressure of the compressor under test 2; and a suction pressure regulating valve 122, located upstream of the suction pressure sensor 121, used to regulate the suction pressure according to the detection value of the suction pressure sensor 121. That is, the suction pressure regulating valve 122 adjusts the suction pressure transmitted from the suction pipeline P1 to the suction end 2a of the compressor under test 2 to a preset pressure value according to the detection value of the suction pressure sensor 121, thereby maintaining a stable suction pressure.

[0042] Furthermore, the suction pressure regulating assembly 12 also includes a pressure reducing valve 123, located at the inlet end of the suction line P1 (i.e., the end connected to the nitrogen source) and upstream of the suction pressure regulating valve 122. The pressure reducing valve 123 is used to regulate the gas source pressure delivered to the suction line P1. Here, the gas drawn into the suction line P1 is nitrogen, to simulate the operating conditions of the compressor 2 under test and obtain operating parameters. After the nitrogen enters the suction line P1, the pressure reducing valve 123 adjusts the gas source pressure, regulating the nitrogen pressure entering the suction line P1 to a stable, fluctuation-free state.

[0043] The pressure reducing valve 123 is also connected to the suction pressure sensor 121 to adjust the gas source pressure according to the detection of the suction pressure sensor 121, so that the nitrogen pressure entering the suction line P1 can meet the test requirements of the compressor 2 under test.

[0044] Figure 3 The diagram shows the piping of the compressor online monitoring device in an embodiment of the present invention. Figure 3 The aforementioned online compressor testing equipment can simultaneously detect the operating parameters of multiple compressors under different operating conditions. For example, Figure 3 The diagram shows two parallel test lines used to test two compressors under test 2, labeled as the first test line 301 and the second test line 302. The first test line 301 and the second test line 302 are used to test the operating parameters of the compressors under test 2 under different pressure ratios. By adjusting the pressure ratio of the suction pressure and the discharge pressure, different operating test conditions are simulated to detect the quality of the compressors under test 2. The first test line 301 and the second test line 302 draw in nitrogen gas from the same gas source inlet 30. After the gas source pressure is adjusted by the pressure reducing valve 123, they form parallel suction lines P1 connected to the two compressors under test 2 respectively. The pressure reducing valve 123 is communicatively connected to the suction pressure sensor 121 in each suction line P1, which can be an electrical connection or a signal connection, to determine the gas source pressure that needs to be adjusted at the gas source inlet 30 based on the detection value of the suction pressure sensor 121 in each suction line P1, so as to meet the testing requirements of the compressors under test 2 in subsequent suction lines P1.

[0045] The following uses the first test line 301 as an example to illustrate the other components in the intake line P1. (Combined with...) Figure 2 and Figure 3As shown, the intake pressure stabilizing assembly 12 also includes a buffer storage device located between the pressure reducing valve 123 and the intake pressure regulating valve 122. This buffer storage device is used to regulate the gas flow rate in the intake pipeline P1. Specifically, the buffer storage device includes a gas storage tank 1241, which can store a portion of the nitrogen in the intake pipeline P1 to prevent the nitrogen in the intake pipeline P1 from being drawn down to a negative pressure state. The capacity of the gas storage tank 1241 is, for example, 22L, and can be flexibly adjusted according to the number of compressors 2 connected in parallel. A gas replenishment valve 1242 regulates the gas flow rate in the intake pipeline P1 by being open. The buffer tank 1243 can further improve the stability of the intake gas flow rate and prevent fluctuations in the intake pipeline P1 by buffering and storing a portion of the gas. A one-way valve 1244 can be installed between the gas replenishment valve 1242 and the buffer tank 1243 to prevent backflow of gas.

[0046] Furthermore, the intake pressure stabilization assembly 12 also includes: a low-pressure control device 125, located at the inlet end of the intake line P1 and upstream of the pressure reducing valve 123. The low-pressure control device 125 is used to issue an alarm when the gas source pressure is lower than a minimum threshold to prevent insufficient nitrogen pressure in the intake line P1. A filter 126 is located between the intake pressure sensor 121 and the intake end of the compressor under test 2 to filter the intake gas of the compressor under test 2, preventing impurities in the intake gas. Thus, through the above configuration, the intake line P1 can provide a stable, clean, and controllable test gas to the compressor under test 2.

[0047] In addition, other auxiliary detection components can be installed in the intake line P1. For example, at the gas source inlet 30, an intake pressure gauge 1271 can be installed to monitor the gas source pressure, and a gas consumption meter 1272 can be installed to count the nitrogen flow rate. At the intake end of the compressor 2 under test, a low-pressure gauge 1273 can be installed to monitor the intake pressure, and an intake temperature sensor 1274 can be installed to monitor the intake temperature. Simultaneously, some relevant valves can be configured to stop the test process when any of the above monitoring data becomes abnormal.

[0048] Combination Figure 2 and Figure 3As shown, the components in the exhaust pressure stabilizing assembly 13 that control, regulate, and maintain the exhaust pressure mainly include: an exhaust pressure sensor 131, connected to the exhaust end 2b of the compressor under test 2 and located in the main line of the exhaust pipeline P2; the exhaust pressure sensor 131 is used to detect the exhaust pressure of the compressor under test 2; and a back pressure valve 132, located downstream of the exhaust pressure sensor 131 and in the pressure stabilizing branch P21 of the exhaust pipeline P2; the back pressure valve 132 is used to adjust the exhaust pressure according to the detection value of the exhaust pressure sensor 131. That is, the back pressure valve 132 controls the exhaust pressure of the compressor under test 2 according to the detection value of the exhaust pressure sensor 131, so that the exhaust pressure of the compressor under test 2 reaches and is maintained at a constant pressure value set according to the test requirements, meeting the requirement of stable exhaust pressure during the load operation phase.

[0049] Furthermore, the intake line P1 is specifically led out after the intake pressure regulating valve 122, and connected to the back pressure valve 132 via the balance valve 1331 and the exhaust valve 1332 to facilitate the adjustment of the intake and exhaust pressure ratio as needed. A safety relief valve 1333 can be connected after the back pressure valve 132 to release pressure promptly when a test cycle ends or when the pressure in the pressure stabilizing branch P21 is abnormal. A one-way valve 1334 and a condenser 1335 can be installed between the back pressure valve 132 and the safety relief valve 1333 to prevent gas backflow and to dissipate heat and cool the gas, facilitating subsequent recovery and recirculation back to the intake line P1.

[0050] The exhaust pressure regulating assembly 13 also includes multiple pressure boosting devices located downstream of the exhaust pressure sensor 131 and in the main line of the exhaust pipe P2, for example... Figure 3 The diagram shows a first set of booster devices 1341 and a second set of booster devices 1342 to recover gas and extend the exhaust time, facilitating the collection of exhaust parameters from the compressor 2 under test. Each booster device includes a booster tank and a booster valve, and the capacity of each booster device can be different, for example... Figure 3 The first set of pressure boosting devices 1341 has a pressure boosting tank and pressure boosting valve with a capacity of 0.3L each, while the second set of pressure boosting devices 1342 has a pressure boosting tank and pressure boosting valve with a capacity of 0.6L each.

[0051] The exhaust pressure stabilizing assembly 13 also includes at least one pressure relief valve located downstream of the booster device. Each pressure relief valve is located in a pressure relief branch P22 of the exhaust pipe P2, and the pressure relief branch P22 is connected in parallel with the pressure stabilizing branch P21. For example Figure 3The diagram shows a main pressure relief valve 1351 and a residual pressure relief valve 1352. The pressure relief branch P22, where the main pressure relief valve 1351 is located, serves as the main pressure relief branch, used to release exhaust gas during the pressure relief phase, thereby reducing the exhaust pressure. The pressure relief branch P22, where the residual pressure relief valve 1352 is located, serves as an auxiliary pressure relief branch. Additionally, an oil separator 1353 is installed in the exhaust pipe P2 to achieve gas-liquid separation, and the separated oil is discharged through an oil drain valve 1354. The suction pipe P1 of the compressor under test 2, specifically before the suction end of the compressor under test 2, can be separately led out through an intake pressure relief valve 1355 to promptly discharge any abnormal suction pressure. Downstream of each pressure relief valve, an exhaust gas purifier 1356 can filter and purify the exhaust gas.

[0052] Furthermore, the exhaust pressure stabilizing assembly 13 can also be equipped with some monitoring devices to monitor the exhaust parameters of the compressor under test 2. Specifically, this includes: a temperature control device 1361, which includes, for example, an exhaust temperature sensor and a temperature control switch, connected to the exhaust end of the compressor under test 2 and located upstream of the exhaust pressure sensor 131. The temperature control device 1361 is used to issue an alarm when the exhaust temperature of the compressor under test 2 exceeds the maximum temperature threshold. A high-pressure control device 1362 is located between the temperature control device 1361 and the exhaust pressure sensor 131. The high-pressure control device 1362 is used to issue an alarm when the exhaust pressure exceeds the maximum pressure threshold. A safety valve 1363 can also be provided to release pressure promptly when the exhaust pressure is too high. Additionally, the exhaust pressure can be monitored by a high-pressure gauge 1364.

[0053] By setting the exhaust pressure stabilizing component 13, the exhaust pressure of the compressor under test 2 can be effectively controlled, and the exhaust pressure can be adjusted as needed to meet the testing requirements of the compressor under test 2.

[0054] Reference Figure 2 As shown, the data acquisition device 14 includes: a suction detection device 141, connected to the suction end 2a of the compressor under test 2, for detecting and acquiring the suction parameters of the compressor under test 2; a discharge detection device 142, connected to the discharge end 2b of the compressor under test 2, for detecting and acquiring the discharge parameters of the compressor under test 2; and a calculation device 143, for obtaining the detection results of the compressor under test 2 based on the suction and discharge parameters. The data acquisition device 14 can be controlled by a programmable logic controller (PLC) for data acquisition and calculation.

[0055] In addition, the regulated power supply 11 is connected to the power supply and can be controlled by a programmable logic controller (PLC) to detect and adjust voltage parameters in order to deliver a stable voltage to the compressor 2 under test.

[0056] Figure 4The test conditions of the compressor online testing device in the embodiment are shown. Using the compressor online testing device described in any of the above embodiments, the compressor under test can experience the following stages in one test cycle: balancing operation stage 401, pressurization operation stage 402, load operation stage 403, and depressurization stage 404. The balancing operation stage 401 is used for initial startup of the compressor under test, where the suction and discharge pressures are adjusted for preheating. In the pressurization operation stage 402, the suction pressure of the compressor under test is kept constant, while the discharge pressure is gradually increased to reach the required discharge pressure threshold 400 for testing. Then, in the load operation stage 403, the suction and discharge pressures are kept constant, for example, stabilizing the discharge pressure at 2.0 MPa, placing the compressor under test in a load operation condition with constant discharge pressure for collecting accurate operating parameters. The duration of the load operation stage 403 depends on the test requirements to ensure accurate parameters of the compressor under test can be collected. After sampling is completed, the test enters the depressurization stage 404, reducing the discharge pressure to zero to complete one test cycle.

[0057] Figure 5 The diagram shows a control schematic for the load operation phase in the embodiment. (Refer to...) Figure 5 As shown, through the combined action of the regulated power supply 11, the intake pressure stabilizing component 12, and the exhaust pressure stabilizing component 13, the compressor under test 2 receives a stable input voltage, maintains stable intake and exhaust pressures, and operates under a load condition with constant exhaust pressure. The acquisition device 14 collects multiple sets of operating parameters of the compressor under test 2 under load conditions, achieving accurate detection of the compressor under test 2. The acquisition device 14 employs a multiple sampling and integration method to obtain accurate detection results through final comparison.

[0058] Based on the compressor online testing equipment described in any of the above embodiments, the present invention also provides a compressor online testing method. Figure 6 The main steps of the compressor online detection method in the embodiment are shown below, with reference to Figure 6 As shown, the compressor online detection method in this embodiment includes: in step S610, a predetermined voltage is output to the compressor under test through a regulated power supply; in step S620, the suction pressure of the compressor under test is adjusted to a preset suction pressure value through a suction pressure stabilizing component; in step S630, the discharge pressure of the compressor under test is adjusted to a preset discharge pressure value through a discharge pressure stabilizing component, so that the compressor under test enters a load operation stage with constant discharge pressure; and in step S640, the operating parameters of the compressor under test during the load operation stage are collected by a data acquisition device to obtain the detection result of the compressor under test.

[0059] Steps S610 to S640 can be achieved through the regulated power supply, intake regulated pressure component, exhaust regulated pressure component and acquisition device of the compressor online detection equipment, respectively. For details, please refer to the above description of the compressor online detection equipment, which will not be repeated here.

[0060] The aforementioned online compressor testing equipment demonstrated significant improvements in quality, accuracy, and efficiency during online compressor testing. Regarding quality, process testing statistics showed a 23.5% increase in testing capability within six months, with many defective compressors failing to be detected using traditional testing equipment. Disassembly investigations of defective compressors confirmed the underlying causes and phenomena, greatly contributing to improved product quality and increasing opportunities for improvement. In terms of accuracy, sampling tests of a specific model showed that compressors tested using the online testing equipment within six months met design standards in power testing, with an average accuracy of 99.5%, ensuring that compressor performance fully complies with energy efficiency control requirements. Regarding efficiency, the online testing equipment reduced the testing cycle time from 16 seconds per unit to 12 seconds per unit, increasing testing efficiency by 25%. It also reduced the number of testing personnel by one per shift, fully meeting the needs of online compressor testing and resulting in improved economic benefits.

[0061] In summary, the compressor online testing equipment and method of the present invention achieves controllable power supply through a regulated power supply, purifies the power input, and is free from interference from power grid fluctuations; it regulates the suction pressure of the compressor under test through a suction pressure regulating component to keep the suction pressure stable, ensuring that the operating parameters of the compressor under test remain stable and accurate during the load operation phase; and it regulates the discharge pressure of the compressor under test through a discharge pressure regulating component to keep the discharge pressure of the compressor under test constant according to the test requirements. Thus, the acquisition device can collect the operating parameters of the compressor under test during the load operation phase, with a long sampling time, sufficient sampling data, and stable and accurate collected operating parameters, achieving flexible, stable, and accurate detection of the operating parameters of the compressor under test, and meeting the testing requirements.

[0062] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. An online compressor testing device, characterized in that, include: A regulated power supply is connected to the compressor under test. A suction pressure regulating component is connected to the suction line of the compressor under test and is used to regulate the suction pressure of the compressor under test. The suction pressure stabilizing assembly includes: a suction pressure sensor connected to the suction end of the compressor under test for detecting the suction pressure of the compressor under test; a suction pressure regulating valve located upstream of the suction pressure sensor for adjusting the suction pressure based on the detection of the suction pressure sensor; a pressure reducing valve located at the inlet end of the suction pipeline, upstream of the suction pressure regulating valve and communicatively connected to the suction pressure sensor, the pressure reducing valve for adjusting the gas source pressure delivered to the suction pipeline based on the detection of the suction pressure sensor; and a buffer storage device located between the pressure reducing valve and the suction pressure regulating valve, the buffer storage device for adjusting the gas flow rate in the suction pipeline. An exhaust pressure stabilizing assembly is connected to the exhaust pipe of the compressor under test and is used to regulate the exhaust pressure of the compressor under test so that the compressor under test has a load operation phase with constant exhaust pressure. The exhaust pressure stabilizing assembly includes: an exhaust pressure sensor connected to the exhaust end of the compressor under test and located in the main line of the exhaust pipeline, used to detect the exhaust pressure of the compressor under test; a back pressure valve located downstream of the exhaust pressure sensor and in the pressure stabilizing branch of the exhaust pipeline, used to adjust the exhaust pressure according to the detection of the exhaust pressure sensor; multiple sets of pressure boosting devices located downstream of the exhaust pressure sensor and in the main line, used to recover gas and extend the exhaust time; and A data acquisition device is connected to the compressor under test and is used to acquire the operating parameters of the compressor under test during the load operation phase. The acquisition device includes: an intake detection device connected to the intake end of the compressor under test, used to detect and acquire the intake parameters of the compressor under test; an exhaust detection device connected to the exhaust end of the compressor under test, used to detect and acquire the exhaust parameters of the compressor under test; and a calculation device used to obtain the detection result of the compressor under test based on the intake parameters and the exhaust parameters.

2. The compressor online testing device as described in claim 1, characterized in that, The intake voltage stabilizing component also includes: A low-pressure control device is located at the inlet end of the intake pipe and upstream of the pressure reducing valve. The low-pressure control device is used to issue an alarm when the gas source pressure is less than a minimum threshold. A filter is disposed between the suction pressure sensor and the suction end of the compressor under test, and is used to filter the suction gas of the compressor under test.

3. The compressor online testing equipment as described in claim 1, characterized in that, Each of the pressure boosting devices includes a pressure boosting tank and a pressure boosting valve.

4. The compressor online testing device as described in claim 1, characterized in that, The exhaust pressure stabilizing assembly also includes at least one pressure relief valve located downstream of the booster device, each of the pressure relief valves being located in a pressure relief branch of the exhaust pipeline, the pressure relief branch being connected in parallel with the pressure stabilizing branch.

5. The compressor online testing device as described in claim 1, characterized in that, The exhaust pressure stabilizing assembly also includes: A temperature control device is connected to the exhaust end of the compressor under test and located upstream of the exhaust pressure sensor. The temperature control device is used to issue an alarm when the exhaust temperature of the compressor under test exceeds the maximum temperature threshold. A high-pressure control device is located between the temperature control device and the exhaust pressure sensor. The high-pressure control device is used to issue an alarm when the exhaust pressure exceeds the maximum pressure threshold.

6. A method for online testing of a compressor, characterized in that, Based on the compressor online testing equipment as described in any one of claims 1-5, the compressor online testing method includes: The regulated power supply outputs a predetermined voltage to the compressor under test. The suction pressure of the compressor under test is adjusted to a preset suction pressure value by means of the suction pressure stabilizing component; The exhaust pressure stabilizing assembly adjusts the exhaust pressure of the compressor under test to a preset exhaust pressure value, thereby enabling the compressor under test to enter a load operation phase with constant exhaust pressure; and The acquisition device collects multiple sets of operating parameters of the compressor under test during the load operation phase to obtain the test results of the compressor under test.

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