Self-locking joint resistance testing device

Abstract

The utility model discloses a self-locking joint resistance testing device, which comprises a cold source unit, an evaporation unit, a condensation unit and a testing unit, and is characterized in that the cold source unit is used for containing and outputting a liquid refrigerant; the inlet end of the evaporation unit is communicated with the outlet end of the cold source unit, and the evaporation unit is used for evaporating a passing liquid refrigerant into a gaseous refrigerant; the outlet end of the condensing unit is communicated with the return port end of the cold source unit, and the condensing unit is used for condensing a passing gaseous refrigerant into a liquid refrigerant; the testing unit comprises a first self-locking connector and a first differential pressure sensor, and the two ends of the first self-locking connector are detachably communicated with the outlet end of the evaporation unit and the inlet end of the condensation unit respectively. The resistance testing device has the beneficial effects that the resistance testing device can simulate the resistance condition of the self-locking joint in an actual use environment, so that the resistance test of the self-locking joint is completed, and the test result is real and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of testing equipment, in particular to a self-locking joint resistance testing device. Background Art

[0002] Current server cabinets are usually equipped with backplane heat exchange systems for forced heat dissipation to meet the heat dissipation requirements of data center servers. In the backplane heat exchange system, self-locking joints are used for quick connection between pipes. The self-locking joints will produce a certain resistance to the refrigerant in the pipes. If the resistance of the self-locking joints is too large, it will affect the fluidity of the refrigerant and reduce the heat dissipation effect of the backplane heat exchange system. Before using the self-locking joints, it is necessary to perform a resistance test on the self-locking joints. Existing resistance testing devices (such as a jet nozzle guide resistance dynamic test device disclosed in application number 202011556058.6) cannot perform resistance tests on self-locking joints, nor can they simulate the resistance of self-locking joints in actual use environments. Utility Model Content

[0003] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose a self-locking joint resistance testing device to solve the technical problems that the resistance testing device in the prior art cannot perform resistance testing on the self-locking joint and cannot simulate the resistance conditions of the self-locking joint in actual use environment.

[0004] In order to achieve the above technical objectives, the technical solution of the present invention provides a self-locking joint resistance testing device, comprising:

[0005] A cold source unit, used to contain and output liquid refrigerant;

[0006] an evaporation unit, the inlet end of which is in communication with the outlet end of the cold source unit and is used to evaporate the liquid refrigerant passing therethrough into a gaseous refrigerant;

[0007] A condensing unit, the outlet of which is connected to the return port of the cold source unit and is used to condense the gaseous refrigerant passing therethrough into liquid refrigerant;

[0008] The test unit includes a first self-locking joint and a first differential pressure sensor. The two ends of the first self-locking joint are detachably connected to the outlet end of the evaporation unit and the inlet end of the condensing unit respectively. The first differential pressure sensor is connected to the two ends of the first self-locking joint and is used to detect the pressure difference at the two ends of the first self-locking joint.

[0009] Furthermore, the self-locking joint resistance testing device also includes a supercooling unit, whose inlet end is connected to the outlet end of the cold source unit and is used to control the temperature of the liquid refrigerant passing through, and the inlet end of the evaporation unit is connected to the outlet end of the supercooling unit.

[0010] Furthermore, the test unit also includes a second self-locking joint and a second pressure differential sensor, the two ends of the second self-locking joint are respectively detachably connected to the outlet end of the subcooling unit and the inlet end of the evaporation unit, and the second pressure differential sensor is connected to the two ends of the second self-locking joint for detecting the pressure difference at the two ends of the second self-locking joint.

[0011] Furthermore, the cold source unit includes a first liquid storage tank, a first drive pump, a filter and a first flow meter. The first liquid storage tank is used to contain liquid refrigerant. The inlet end of the first drive pump is connected to the first liquid storage tank via a pipeline for extracting the liquid refrigerant in the first liquid storage tank. The inlet end of the filter is connected to the outlet end of the first drive pump via a pipeline. The first flow meter is arranged at the outlet end of the filter to detect the flow rate of the liquid refrigerant. The inlet end of the supercooling unit is connected to the outlet end of the filter via a pipeline.

[0012] Furthermore, the evaporation unit includes a tank body and a first heating rod, the inlet end of the first self-locking joint is detachably connected to the tank body, the outlet end of the second self-locking joint is detachably connected to the tank body, and the first heating rod is arranged in the tank body to heat the liquid refrigerant entering the tank body.

[0013] Furthermore, the evaporation unit also includes a first temperature sensor, a first pressure sensor, a second temperature sensor and a second pressure sensor. The first temperature sensor is arranged at the inlet end of the condensing unit to detect the temperature of the gas-liquid refrigerant after evaporation. The first pressure sensor is arranged at the inlet end of the condensing unit to detect the pressure of the gas-liquid refrigerant after evaporation. The second temperature sensor is arranged at the outlet end of the supercooling unit to detect the temperature of the liquid refrigerant before evaporation. The second pressure sensor is arranged at the outlet end of the supercooling unit to detect the pressure of the liquid refrigerant before evaporation.

[0014] Furthermore, the condensing unit includes a condensing plate heat exchanger, a second liquid storage tank, a second driving pump, a first chiller and a second flow meter, the outlet end of the first passage of the condensing plate heat exchanger is connected to the first liquid storage tank via a pipe, the outlet end of the first self-locking joint is detachably connected to the inlet end of the first passage of the condensing plate heat exchanger, the inlet end of the second driving pump is connected to the second liquid storage tank via a pipe, the outlet end of the second driving pump is connected to the inlet end of the second passage of the condensing plate heat exchanger via a pipe, for extracting the cooling water in the second liquid storage tank, the inlet end of the first chiller is connected to the outlet end of the second passage of the condensing plate heat exchanger via a pipe, the outlet end of the first chiller is connected to the second liquid storage tank via a pipe, for reducing the temperature of the cooling water, and the second flow meter is arranged at the outlet end of the second driving pump to detect the flow rate of the cooling water.

[0015] Furthermore, the condensing unit also includes a second heating rod, a third temperature sensor, a first controller and a fourth temperature sensor. The second heating rod is used to heat the cooling water in the second liquid storage tank. The third temperature sensor is arranged at the inlet end of the second passage of the condensing plate heat exchange to detect the temperature of the cooling water before heat exchange. The input end of the first controller is electrically connected to the third temperature sensor to receive temperature feedback from the third temperature sensor. The output end of the first controller is electrically connected to the second heating rod to control the start and stop of the second heating rod. The fourth temperature sensor is arranged at the outlet end of the second passage of the condensing plate heat exchange to detect the temperature of the cooling water after heat exchange.

[0016] Furthermore, the subcooling unit includes a subcooling plate heat exchanger, a third liquid storage tank, a third driving pump and a second chiller. The inlet end of the first passage of the subcooling plate heat exchanger is connected to the outlet end of the filter via a pipe, the inlet end of the second self-locking joint is detachably connected to the outlet end of the first passage of the subcooling plate heat exchanger, the inlet end of the third driving pump is connected to the third liquid storage tank via a pipe, the outlet end of the third driving pump is connected to the inlet end of the second passage of the subcooling plate heat exchanger via a pipe, so as to pump out the cooling water in the third liquid storage tank, the inlet end of the second chiller is connected to the outlet end of the second passage of the subcooling plate heat exchanger via a pipe, and the outlet end of the second chiller is connected to the third liquid storage tank via a pipe to increase the temperature of the cooling water.

[0017] Furthermore, the supercooling unit also includes a third heating rod, a fifth temperature sensor and a second controller. The third heating rod is used to heat the cooling water in the third liquid storage tank. The fifth temperature sensor is arranged at the outlet end of the first passage of the supercooling plate heat exchange to detect the temperature of the refrigerant after heat exchange. The input end of the second controller is electrically connected to the fifth temperature sensor to receive temperature feedback from the fifth temperature sensor. The output end of the second controller is electrically connected to the third heating rod to control the start and stop of the third heating rod.

[0018] Compared with the prior art, the beneficial effects of the present invention include: during testing, the two ends of the first self-locking joint are detachably connected to the outlet end of the evaporation unit and the inlet end of the condensing unit respectively, and the liquid refrigerant contained in the cold source unit is output and enters the evaporation unit. The evaporation unit evaporates the liquid refrigerant passing through into gaseous refrigerant. After the gaseous refrigerant passes through the first self-locking joint, it enters the condensing unit. The condensing unit re-condenses the gaseous refrigerant passing through into liquid refrigerant, and the liquid refrigerant enters the cold source unit again, forming a refrigerant circulation loop, simulating the actual use environment of the self-locking joint, and the pressure difference data at the two ends of the first self-locking joint can be directly read by the first pressure difference sensor, and then the resistance of the first self-locking joint to the refrigerant is judged according to the pressure difference data. By using this resistance testing device, the resistance of the self-locking joint in the actual use environment can be simulated, thereby completing the resistance test of the self-locking joint, and the test results are true and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of a self-locking joint resistance testing device provided by the utility model;

[0020] In the figure: 100 - cold source unit, 110 - first liquid storage tank, 120 - first driving pump, 130 - filter, 140 - first flow meter, 150 - regulating valve, 200 - evaporation unit, 210 - tank, 220 - first heating rod, 230 - first temperature sensor, 240 - first pressure sensor, 250 - second temperature sensor, 260 - second pressure sensor, 300 - condensing unit, 310 - condensing plate heat exchange, 320 - second liquid storage tank, 330 - second driving pump, 340 - first chiller, 350 - Second flowmeter, 360-second heating rod, 370-third temperature sensor, 380-first controller, 390-fourth temperature sensor, 400-test unit, 410-first self-locking joint, 420-first differential pressure sensor, 430-second self-locking joint, 440-second differential pressure sensor, 500-subcooling unit, 510-subcooling plate heat exchange, 520-third liquid storage tank, 530-third drive pump, 540-second chiller, 550-third heating rod, 560-fifth temperature sensor, 570-second controller. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of 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.

[0022] The utility model provides a self-locking joint resistance testing device, the structure of which is as follows: Figure 1 As shown, it includes a cold source unit 100, an evaporation unit 200, a condensation unit 300 and a test unit 400, wherein the cold source unit 100 is used to contain and output liquid refrigerant; the inlet end of the evaporation unit 200 is connected to the outlet end of the cold source unit 100, and is used to evaporate the liquid refrigerant passing through into gaseous refrigerant; the outlet end of the condensation unit 300 is connected to the return end of the cold source unit 100, and is used to condense the gaseous refrigerant passing through into liquid refrigerant; the test unit 400 includes a first self-locking joint 410 and a first differential pressure sensor 420, wherein the two ends of the first self-locking joint 410 are detachably connected to the outlet end of the evaporation unit 200 and the inlet end of the condensation unit 300 respectively, and the first differential pressure sensor 420 is connected to the two ends of the first self-locking joint 410 for detecting the pressure difference between the two ends of the first self-locking joint 410.

[0023] During the test, the two ends of the first self-locking joint 410 are detachably connected to the outlet end of the evaporation unit 200 and the inlet end of the condensing unit 300, respectively. The liquid refrigerant contained in the cold source unit 100 is output and enters the evaporation unit 200. The evaporation unit 200 evaporates the liquid refrigerant passing through into gaseous refrigerant. After the gaseous refrigerant passes through the first self-locking joint 410, it enters the condensing unit 300. The condensing unit 300 recondenses the gaseous refrigerant passing through into liquid refrigerant, thereby controlling the evaporation temperature of the liquid refrigerant. After the evaporation unit 200 evaporates the liquid refrigerant passing through into gaseous refrigerant, gas and liquid refrigerants coexist in the pipeline, the pressure in the pipeline increases, and the liquid refrigerant is cooled. The evaporation temperature of the gaseous refrigerant will increase. In order to ensure that the evaporation temperature of the liquid refrigerant can be maintained in a relatively stable state, it is necessary to ensure that the pressure in the pipeline is relatively stable. Therefore, the gaseous refrigerant needs to be condensed in time to liquefy it, and the liquid refrigerant enters the cold source unit 100 again to form a refrigerant circulation loop, simulating the actual use environment of the self-locking joint. The pressure difference data at both ends of the first self-locking joint 410 can be directly read by the first pressure difference sensor 420, and the resistance of the first self-locking joint 410 to the refrigerant can be judged according to the pressure difference data. The resistance testing device can simulate the resistance of the self-locking joint in the actual use environment, thereby completing the resistance test of the self-locking joint, and the test results are true and reliable.

[0024] As a preferred embodiment, please refer to Figure 1 The self-locking joint resistance testing device further includes a supercooling unit 500, whose inlet end is connected to the outlet end of the cold source unit 100 and is used to control the temperature of the liquid refrigerant passing through. The inlet end of the evaporation unit 200 is connected to the outlet end of the supercooling unit 500. The liquid refrigerant contained in the cold source unit 100 is output and enters the supercooling unit 500. The supercooling unit 500 can increase the temperature of the liquid refrigerant, so that the temperature of the liquid refrigerant entering the evaporation unit 200 is close to the evaporation temperature of the liquid refrigerant, thereby reducing the output power of the evaporation unit 200.

[0025] As a preferred embodiment, please refer to Figure 1The test unit 400 also includes a second self-locking joint 430 and a second pressure difference sensor 440. The two ends of the second self-locking joint 430 are detachably connected to the outlet end of the supercooling unit 500 and the inlet end of the evaporation unit 200, respectively. The second pressure difference sensor 440 is connected to the two ends of the second self-locking joint 430 to detect the pressure difference between the two ends of the second self-locking joint 430. The first self-locking joint 410 passes through the gas-liquid refrigerant, and the second self-locking joint 430 passes through the liquid refrigerant. The resistance test of the gas-liquid refrigerant can be completed through the first self-locking joint 410, and the resistance test of the liquid refrigerant can be completed through the second self-locking joint 430, simulating the actual use environment of the self-locking joint.

[0026] As a preferred embodiment, the first self-locking joint 410 and the second self-locking joint 430 are of different models. After the first test is completed, the positions of the first self-locking joint 410 and the second self-locking joint 430 can be exchanged to change the simulation environment. The first self-locking joint 410 and the second self-locking joint 430 can be quickly plugged in and out, and the pipeline can be easily replaced. The first self-locking joint 410 and the second self-locking joint 430 are connected by threads, and adapters can be used to test various specifications.

[0027] As a preferred embodiment, please refer to Figure 1 The cold source unit 100 includes a first liquid storage tank 110, a first driving pump 120, a filter 130 and a first flow meter 140. The first liquid storage tank 110 is used to hold liquid refrigerant. The inlet end of the first driving pump 120 is connected to the first liquid storage tank 110 via a pipeline to extract the liquid refrigerant in the first liquid storage tank 110. The inlet end of the filter 130 is connected to the outlet end of the first driving pump 120 via a pipeline. The first flow meter 140 is arranged at the outlet end of the filter 130 to detect the flow rate of the liquid refrigerant. The inlet end of the supercooling unit 500 is connected to the outlet end of the filter 130 via a pipeline. The first driving pump 120 pumps the liquid refrigerant in the first liquid storage tank 110 into the filter 130. The filter 130 can filter the liquid refrigerant, and the filtered liquid refrigerant enters the supercooling unit 500 for heating.

[0028] As a preferred embodiment, the first driving pump 120 is a fluorine pump, and the flow rate of the liquid refrigerant can be controlled by controlling the frequency of the inverter. The first flow meter 140 is a turbine flow meter.

[0029] As a preferred embodiment, please refer to Figure 1The cold source unit 100 further includes a regulating valve 150, the inlet end of the regulating valve 150 is connected to the outlet end of the filter 130 via a pipeline, and the outlet end of the regulating valve 150 is connected to the first liquid storage tank 110 via a pipeline, so as to control the flow rate of the liquid refrigerant flowing into the first liquid storage tank 110. By controlling the opening of the regulating valve 150, the flow rate of the liquid refrigerant flowing into the first liquid storage tank 110 can be controlled.

[0030] As a preferred embodiment, please refer to Figure 1 The evaporation unit 200 includes a tank body 210 and a first heating rod 220. The inlet end of the first self-locking joint 410 is detachably connected to the tank body 210, and the outlet end of the second self-locking joint 430 is used to be detachably connected to the tank body 210. The first heating rod 220 is arranged in the tank body 210 to heat the liquid refrigerant entering the tank body 210, so that the liquid refrigerant entering the tank body 210 is heated and evaporated.

[0031] As a preferred embodiment, please refer to Figure 1 The evaporation unit 200 further includes a first temperature sensor 230, a first pressure sensor 240, a second temperature sensor 250 and a second pressure sensor 260. The first temperature sensor 230 is arranged at the inlet end of the condensing unit 300 to detect the temperature of the gas-liquid refrigerant after evaporation. The first pressure sensor 240 is arranged at the inlet end of the condensing unit 300 to detect the pressure of the gas-liquid refrigerant after evaporation. The second temperature sensor 250 is arranged at the outlet end of the supercooling unit 500 to detect the temperature of the liquid refrigerant before evaporation. The second pressure sensor 260 is arranged at the outlet end of the supercooling unit 500 to detect the pressure of the liquid refrigerant before evaporation, so that the temperature and pressure of the liquid refrigerant before evaporation and the temperature and pressure of the gas-liquid refrigerant after evaporation can be monitored in real time.

[0032] As a preferred embodiment, please refer to Figure 1The condensing unit 300 includes a condensing plate heat exchanger 310, a second liquid storage tank 320, a second driving pump 330, a first chiller 340 and a second flow meter 350. The outlet end of the first passage of the condensing plate heat exchanger 310 is connected to the first liquid storage tank 110 via a pipeline, and the outlet end of the first self-locking joint 410 is detachably connected to the inlet end of the first passage of the condensing plate heat exchanger 310. The inlet end of the second driving pump 330 is connected to the second liquid storage tank 320 via a pipeline, and the outlet end of the second driving pump 330 is connected to the inlet end of the second passage of the condensing plate heat exchanger 310 via a pipeline to pump out the cooling water in the second liquid storage tank 320. The inlet end of the first chiller 340 is connected to the condensing plate heat exchanger 310 via a pipeline. 10, the outlet end of the second passage of the first chiller 340 is connected to the second liquid storage tank 320 via a pipeline to reduce the temperature of the cooling water, and the second flow meter 350 is arranged at the outlet end of the second drive pump 330 to detect the flow of the cooling water. The gaseous refrigerant enters the first passage of the condensation plate heat exchanger 310, and the cooling water enters the second passage of the condensation plate heat exchanger 310. The gaseous refrigerant and the cooling water exchange heat through the separated plates. The gaseous refrigerant condenses into liquid refrigerant, thereby controlling the evaporation temperature of the liquid refrigerant. The temperature of the cooling water rises after the heat exchange, and the temperature of the cooling water can be reduced by the first chiller 340, so that the cooling water can be continuously kept at a low temperature to realize the recycling of the cooling water.

[0033] As a preferred embodiment, the second driving pump 330 is a water pump, which can control the flow of cooling water by controlling the frequency of the inverter. The second flow meter 350 is a float flow meter, which can adjust the cooling water flow by controlling the opening knob on the float flow meter.

[0034] As a preferred embodiment, please refer to Figure 1The condensing unit 300 further includes a second heating rod 360, a third temperature sensor 370, a first controller 380 and a fourth temperature sensor 390. The second heating rod 360 is used to heat the cooling water in the second liquid storage tank 320. The third temperature sensor 370 is provided at the inlet end of the second passage of the condensing plate heat exchange 310 to detect the temperature of the cooling water before heat exchange. The input end of the first controller 380 is electrically connected to the third temperature sensor 370 to receive temperature feedback from the third temperature sensor 370. The output end of the first controller 380 is electrically connected to the The second heating rod 360 is electrically connected and is used to control the start and stop of the second heating rod 360. The fourth temperature sensor 390 is arranged at the outlet end of the second passage of the condensation plate heat exchange 310 to detect the temperature of the cooling water after heat exchange. Since the evaporation temperature of the liquid refrigerant that needs to simulate the actual test power is high, the cooling capacity control of the first chiller 340 is not stable enough, and the cooling water in the second liquid storage tank 320 needs to be slightly heated. The first controller 380 controls the second heating rod 360 to heat the cooling water in the second liquid storage tank 320 to stabilize the cooling water temperature.

[0035] As a preferred embodiment, please refer to Figure 1 The subcooling unit 500 includes a subcooling plate heat exchanger 510, a third liquid storage tank 520, a third driving pump 530 and a second chiller 540. The inlet end of the first passage of the subcooling plate heat exchanger 510 is connected to the outlet end of the filter 130 via a pipeline, and the inlet end of the second self-locking joint 430 is detachably connected to the outlet end of the first passage of the subcooling plate heat exchanger 510. The inlet end of the third driving pump 530 is connected to the third liquid storage tank 520 via a pipeline, and the outlet end of the third driving pump 530 is connected to the inlet end of the second passage of the subcooling plate heat exchanger 510 via a pipeline to pump out the cooling water in the third liquid storage tank 520. The inlet end of the second chiller 540 is connected to the The outlet end of the second passage of the subcooling plate heat exchanger 510 is connected, and the outlet end of the second chiller 540 is connected to the third liquid storage tank 520 via a pipeline to increase the temperature of the cooling water. The liquid refrigerant enters the first passage of the subcooling plate heat exchanger 510, and the cooling water enters the second passage of the subcooling plate heat exchanger 510. The liquid refrigerant and the cooling water exchange heat through the separated plates, and the temperature of the liquid refrigerant increases, so that the temperature of the liquid refrigerant entering the evaporation unit 200 is close to the evaporation temperature of the liquid refrigerant. The temperature of the cooling water after heat exchange is reduced. The temperature of the cooling water can be increased by the second chiller 540, so that the cooling water can continuously maintain a high temperature, thereby realizing the recycling of cooling water.

[0036] As a preferred embodiment, the third driving pump 530 is a water pump, and the flow rate of cooling water can be controlled by controlling the frequency of the inverter.

[0037] As a preferred embodiment, please refer to Figure 1 The supercooling unit 500 also includes a third heating rod 550, a fifth temperature sensor 560 and a second controller 570. The third heating rod 550 is used to heat the cooling water in the third liquid storage tank 520. The fifth temperature sensor 560 is arranged at the outlet end of the first passage of the supercooling plate heat exchanger 510 to detect the temperature of the refrigerant after heat exchange. The input end of the second controller 570 is electrically connected to the fifth temperature sensor 560 to receive temperature feedback from the fifth temperature sensor 560. The output end of the second controller 570 is electrically connected to the third heating rod 550 to control the start and stop of the third heating rod 550. Since the evaporation temperature of the liquid refrigerant that needs to simulate the actual test power is high, the heating capacity control of the second chiller 540 is not stable enough, and the cooling water in the third liquid storage tank 520 needs to be slightly heated. The cooling water in the third liquid storage tank 520 is heated by the second controller 570 to stabilize the cooling water temperature.

[0038] In order to better understand the present invention, the following Figure 1 The working principle of the technical solution of the utility model is described in detail:

[0039] During the test, the inlet end of the first self-locking joint 410 is detachably connected to the tank body 210, the outlet end of the first self-locking joint 410 is detachably connected to the inlet end of the first passage of the condensing plate heat exchange 310, the inlet end of the second self-locking joint 430 is detachably connected to the outlet end of the first passage of the subcooling plate heat exchange 510, the outlet end of the second self-locking joint 430 is detachably connected to the tank body 210, the first driving pump 120 pumps the liquid refrigerant in the first liquid storage tank 110 into the filter 130, the filter 130 can filter the liquid refrigerant, and the filtered liquid refrigerant enters the first passage of the subcooling plate heat exchange 510. The cooling water in the third liquid storage tank 520 enters the second passage of the supercooling plate heat exchanger 510, and the liquid refrigerant and the cooling water exchange heat through the separated plates, and the temperature of the liquid refrigerant increases, so that the temperature of the liquid refrigerant entering the tank body 210 is close to the evaporation temperature of the liquid refrigerant. After the temperature is increased, the liquid refrigerant passes through the second self-locking joint 430 and enters the tank body 210. The first heating rod 220 can heat the liquid refrigerant entering the tank body 210, so that the liquid refrigerant entering the tank body 210 is heated and evaporated. After the gaseous refrigerant passes through the first self-locking joint 410, it enters the condensing plate heat exchanger 3 10, the cooling water in the second liquid storage tank 320 enters the second path of the condensing plate heat exchange 310, the gaseous refrigerant and the cooling water exchange heat through the separated plates, and the gaseous refrigerant condenses into liquid refrigerant, thereby controlling the evaporation temperature of the liquid refrigerant. After the evaporation unit 200 evaporates the liquid refrigerant into gaseous refrigerant, gas and liquid refrigerants coexist in the pipeline, the pressure in the pipeline increases, and the evaporation temperature of the liquid refrigerant increases. In order to ensure that the evaporation temperature of the liquid refrigerant can be maintained in a relatively stable state, it is necessary to ensure that the pressure in the pipeline is relatively stable. Therefore, it is necessary to condense the gaseous refrigerant in time to liquefy it, and the liquid refrigerant enters the A refrigerant circulation loop is formed in the first liquid storage tank 110 to simulate the actual use environment of the self-locking joint. The pressure difference data at both ends of the first self-locking joint 410 can be directly read through the first pressure difference sensor 420, and the resistance of the first self-locking joint 410 to the gas-liquid refrigerant can be judged based on the pressure difference data. The pressure difference data at both ends of the second self-locking joint 430 can be directly read through the second pressure difference sensor 440, and the resistance of the second self-locking joint 430 to the liquid refrigerant can be judged based on the pressure difference data. The resistance testing device can simulate the resistance of the self-locking joint in the actual use environment, thereby completing the resistance test of the self-locking joint, and the test results are true and reliable.

[0040] The self-locking joint resistance testing device provided by the utility model has the following beneficial effects:

[0041] (1) The first self-locking joint 410 and the second self-locking joint 430 are of different models. After the first test is completed, the positions of the first self-locking joint 410 and the second self-locking joint 430 can be swapped to change the simulation environment. The first self-locking joint 410 and the second self-locking joint 430 can be quickly plugged in and out, making it convenient to replace the pipes. The first self-locking joint 410 and the second self-locking joint 430 are connected by threads, and adapters can be used to test various specifications.

[0042] (2) The first differential pressure sensor 420 can directly read the differential pressure data at both ends of the first self-locking joint 410, and then determine the resistance of the first self-locking joint 410 to the gas-liquid refrigerant based on the differential pressure data. The second differential pressure sensor 440 can directly read the differential pressure data at both ends of the second self-locking joint 430, and then determine the resistance of the second self-locking joint 430 to the liquid refrigerant based on the differential pressure data, thereby simulating the actual use environment of the self-locking joint;

[0043] (3) The resistance test device can simulate the resistance of the self-locking joint in the actual use environment, thereby completing the resistance test of the self-locking joint, and the test results are true and reliable.

[0044] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A self-locking joint resistance testing device, characterized in that: include: A cold source unit, used to contain and output liquid refrigerant; an evaporation unit, the inlet end of which is in communication with the outlet end of the cold source unit and is used to evaporate the liquid refrigerant passing therethrough into a gaseous refrigerant; A condensing unit, the outlet of which is connected to the return port of the cold source unit and is used to condense the gaseous refrigerant passing therethrough into liquid refrigerant; The test unit includes a first self-locking joint and a first differential pressure sensor. The two ends of the first self-locking joint are detachably connected to the outlet end of the evaporation unit and the inlet end of the condensing unit respectively. The first differential pressure sensor is connected to the two ends of the first self-locking joint and is used to detect the pressure difference at the two ends of the first self-locking joint.

2. The self-locking joint resistance testing device according to claim 1, characterized in that: It also includes a supercooling unit, whose inlet end is connected to the outlet end of the cold source unit and is used to control the temperature of the liquid refrigerant passing through. The inlet end of the evaporation unit is connected to the outlet end of the supercooling unit.

3. The self-locking joint resistance testing device according to claim 2, characterized in that: The testing unit also includes a second self-locking joint and a second pressure differential sensor. The two ends of the second self-locking joint are detachably connected to the outlet end of the subcooling unit and the inlet end of the evaporation unit respectively. The second pressure differential sensor is connected to the two ends of the second self-locking joint for detecting the pressure difference at the two ends of the second self-locking joint.

4. The self-locking joint resistance testing device according to claim 3, characterized in that: The cold source unit includes a first liquid storage tank, a first driving pump, a filter and a first flow meter. The first liquid storage tank is used to contain liquid refrigerant. The inlet end of the first driving pump is connected to the first liquid storage tank via a pipeline for extracting the liquid refrigerant in the first liquid storage tank. The inlet end of the filter is connected to the outlet end of the first driving pump via a pipeline. The first flow meter is arranged at the outlet end of the filter to detect the flow rate of the liquid refrigerant. The inlet end of the supercooling unit is connected to the outlet end of the filter via a pipeline.

5. The self-locking joint resistance testing device according to claim 3, characterized in that: The evaporation unit includes a tank body and a first heating rod. The inlet end of the first self-locking joint is detachably connected to the tank body, and the outlet end of the second self-locking joint is detachably connected to the tank body. The first heating rod is arranged in the tank body to heat the liquid refrigerant entering the tank body.

6. The self-locking joint resistance testing device according to claim 5, characterized in that: The evaporation unit also includes a first temperature sensor, a first pressure sensor, a second temperature sensor and a second pressure sensor. The first temperature sensor is arranged at the inlet end of the condensing unit to detect the temperature of the gas-liquid refrigerant after evaporation. The first pressure sensor is arranged at the inlet end of the condensing unit to detect the pressure of the gas-liquid refrigerant after evaporation. The second temperature sensor is arranged at the outlet end of the supercooling unit to detect the temperature of the liquid refrigerant before evaporation. The second pressure sensor is arranged at the outlet end of the supercooling unit to detect the pressure of the liquid refrigerant before evaporation.

7. The self-locking joint resistance testing device according to claim 4, characterized in that: The condensing unit includes a condensing plate heat exchange, a second liquid storage tank, a second driving pump, a first chiller and a second flow meter, the outlet end of the first passage of the condensing plate heat exchange is connected to the first liquid storage tank via a pipe, the outlet end of the first self-locking joint is detachably connected to the inlet end of the first passage of the condensing plate heat exchange, the inlet end of the second driving pump is connected to the second liquid storage tank via a pipe, the outlet end of the second driving pump is connected to the inlet end of the second passage of the condensing plate heat exchange via a pipe, for extracting the cooling water in the second liquid storage tank, the inlet end of the first chiller is connected to the outlet end of the second passage of the condensing plate heat exchange via a pipe, the outlet end of the first chiller is connected to the second liquid storage tank via a pipe, for reducing the temperature of the cooling water, and the second flow meter is arranged at the outlet end of the second driving pump to detect the flow rate of the cooling water.

8. The self-locking joint resistance testing device according to claim 7, characterized in that: The condensing unit also includes a second heating rod, a third temperature sensor, a first controller and a fourth temperature sensor. The second heating rod is used to heat the cooling water in the second liquid storage tank. The third temperature sensor is arranged at the inlet end of the second passage of the condensing plate heat exchange to detect the temperature of the cooling water before heat exchange. The input end of the first controller is electrically connected to the third temperature sensor to receive temperature feedback from the third temperature sensor. The output end of the first controller is electrically connected to the second heating rod to control the start and stop of the second heating rod. The fourth temperature sensor is arranged at the outlet end of the second passage of the condensing plate heat exchange to detect the temperature of the cooling water after heat exchange.

9. The self-locking joint resistance testing device according to claim 4, characterized in that: The subcooling unit includes a subcooling plate heat exchanger, a third liquid storage tank, a third driving pump and a second chiller. The inlet end of the first passage of the subcooling plate heat exchanger is connected to the outlet end of the filter via a pipe, the inlet end of the second self-locking joint is detachably connected to the outlet end of the first passage of the subcooling plate heat exchanger, the inlet end of the third driving pump is connected to the third liquid storage tank via a pipe, the outlet end of the third driving pump is connected to the inlet end of the second passage of the subcooling plate heat exchanger via a pipe, so as to pump out the cooling water in the third liquid storage tank, the inlet end of the second chiller is connected to the outlet end of the second passage of the subcooling plate heat exchanger via a pipe, and the outlet end of the second chiller is connected to the third liquid storage tank via a pipe to increase the temperature of the cooling water.

10. The self-locking joint resistance testing device according to claim 9, characterized in that: The supercooling unit also includes a third heating rod, a fifth temperature sensor and a second controller. The third heating rod is used to heat the cooling water in the third liquid storage tank. The fifth temperature sensor is arranged at the outlet end of the first passage of the supercooling plate heat exchange to detect the temperature of the refrigerant after heat exchange. The input end of the second controller is electrically connected to the fifth temperature sensor to receive temperature feedback from the fifth temperature sensor. The output end of the second controller is electrically connected to the third heating rod to control the start and stop of the third heating rod.

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