Evaporator testing tool

Abstract

The invention relates to the technical field of evaporator testing, and discloses an evaporator testing tool which comprises a machine box and an evaporator body, a detection assembly is arranged in the machine box, an auxiliary assembly is arranged on one side of the machine box, the evaporator body is installed in the auxiliary assembly, a ceramic valve is installed on the upper surface of the evaporator body, and the ceramic valve is arranged on the lower surface of the machine box. The detection assembly comprises an airtight pressure regulating value display meter, the airtight pressure regulating value display meter is installed on the surface of the machine box, and an airtight air inlet pressure regulating valve is installed on the surface of the machine box. According to the invention, the test pressure is accurately set through the airtight gas inlet pressure regulating valve and the gas resistance gas inlet pressure regulating valve, the gas flow can be flexibly regulated through the manual flow regulating valve, the high-sensitivity flowmeter and the pressure display meter are matched, data are fed back in real time, the PLC automatically completes data acquisition and judgment, manual reading errors are avoided, and the test efficiency is improved. And the consistency and reliability of test results are ensured.

Description

Technical Field

[0001] This invention relates to the field of evaporator testing technology, specifically to an evaporator testing fixture. Background Technology

[0002] An evaporator is a core heat exchange device that uses heat exchange to vaporize liquid substances. It transfers heat to the liquid medium, causing it to transform into a gaseous state under normal or negative pressure. Evaporators are widely used in refrigeration, chemical, food, HVAC, pharmaceutical and other fields. Evaporators need to be tested during production.

[0003] Traditional testing methods require the separate use of multiple specialized devices to perform leak detection and gas resistance detection, which is cumbersome and requires repeated positioning of the evaporator. It is also prone to detection errors due to clamping deviations, and cannot meet the requirements of integrated quality control. Therefore, we propose an evaporator testing fixture. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an evaporator testing fixture that solves the problems of traditional testing methods that require the separate use of multiple dedicated devices to perform leak detection and gas resistance detection, which is cumbersome, requires repeated positioning of the evaporator, and is prone to detection errors due to clamping deviations, thus failing to meet the requirements of integrated quality control.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an evaporator testing fixture, comprising a chassis and an evaporator body, wherein a detection component is disposed inside the chassis, an auxiliary component is disposed on one side of the chassis, the evaporator body is installed inside the auxiliary component, a ceramic valve is mounted on the upper surface of the evaporator body, the detection component includes an airtight pressure regulating value display meter, the airtight pressure regulating value display meter is mounted on the surface of the chassis, an airtight inlet pressure regulating valve is mounted on the surface of the chassis, a leakage flow display meter for displaying the flow rate of the ceramic valve is mounted on the surface of the chassis, and a gas... The system includes a high-sensitivity flow meter, a pressure resistance display meter, a pressure resistance inlet valve, a manual flow control valve, a power indicator light, and a pressure resistance display meter. The test pressure is precisely set via the pressure resistance inlet valve and the pressure resistance inlet valve. The manual flow control valve allows for flexible adjustment of the gas flow rate. Combined with a high-sensitivity flow meter and pressure display meter, data is fed back in real time. The PLC controller automatically completes data acquisition and judgment, avoiding errors from manual readings and ensuring the consistency and reliability of the test results.

[0006] Preferably, a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve, a sixth solenoid valve, and a seventh solenoid valve are installed inside the chassis. The fixture integrates leakage testing and temperature-compensated gas resistance testing functions, eliminating the need to disassemble the equipment or change the fixture. Multi-dimensional index testing can be completed with a single clamping. Compared with traditional single-function testing equipment, it reduces equipment switching and repetitive component positioning, effectively improving testing efficiency and adapting to the batch testing needs of large-scale production.

[0007] Preferably, a relay, a signal conversion module, a PLC controller, and a power supply module are installed inside the chassis. The input terminals of the first, second, third, fourth, fifth, sixth, and seventh solenoid valves are all electrically connected to the output terminals of the relays. The output terminal of the PLC controller is electrically connected to the input terminal of the relays. The input terminal of the signal conversion module is electrically connected to the output terminal of the PLC controller. The output terminal of the power supply module is electrically connected to the input terminal of the PLC controller.

[0008] Preferably, a power supply interface is installed at the rear of the chassis, and the output end of the power supply interface is electrically connected to the input end of the power supply module to supply energy to the device.

[0009] Preferably, an air outlet is installed on the side of the chassis near the power supply interface, and an air inlet is installed on the side of the chassis near the power supply interface. During the test, key data such as leakage flow and air resistance pressure are displayed in real time on the corresponding instruments, and the qualified or unqualified results are clearly marked, which facilitates quick judgment by operators. The test data can be stored synchronously to provide a basis for subsequent quality traceability and problem investigation, help enterprises form a complete quality control closed loop, and improve the factory qualification rate of evaporator products.

[0010] Preferably, a pneumatic triplet is installed on the side of the chassis near the air outlet. The pneumatic triplet inside the chassis filters and reduces the pressure of compressed air to prevent impurities and pressure fluctuations from damaging the internal solenoid valves and sensors. The linkage control between the PLC controller and the relay enables the orderly start and stop of the solenoid valves, reducing mechanical wear. The overall structure is compact and highly protective, effectively resisting dust and minor collisions on site. The equipment can operate continuously without failure for a long time, ensuring the continuity of testing work.

[0011] Preferably, the auxiliary component includes a bracket located on one side of the chassis. A placement cylinder is mounted on the upper surface of the bracket, and the evaporator body is placed inside the placement cylinder. The placement cylinder of the auxiliary component can stably fix the evaporator body. The gas pipe connector of the connecting seat enables a quick and sealed connection of the gas path. The switching operation between the dosing plug and the ceramic valve is convenient and adaptable to the testing needs of different parts. The display and operating components on the surface of the chassis are clearly laid out. Operators can start the test by simple login and button triggering, without the need for complex professional skills, thus lowering the operating threshold.

[0012] Preferably, a connecting seat is fixedly connected to one side of the placement cylinder, and a gas pipe connector is provided on the connecting seat. The gas pipe connector on the connecting seat realizes the sealed connection between the evaporator body and the gas circuit of the casing, ensuring that there is no gas leakage. According to the test requirements, the dosing plug can be installed or removed, and the ceramic valve can be switched to open or closed state to prepare for leakage tests in different parts.

[0013] Preferably, an adjusting nut is provided at the bottom of the placement cylinder.

[0014] Preferably, a dosing plug is installed on one side of the placement cylinder.

[0015] In summary, the technical effects and advantages of this invention are as follows:

[0016] 1. In this invention, the tooling integrates leakage testing and temperature-compensated gas resistance testing functions. There is no need to disassemble the equipment or change the tooling. Multi-dimensional index testing can be completed in one clamping. Compared with traditional single-function testing equipment, it reduces equipment switching and component repetitive positioning, effectively improves testing efficiency, and adapts to the batch testing needs of large-scale production.

[0017] 2. In this invention, the test pressure is precisely set by the airtight inlet pressure regulating valve and the air resistance inlet pressure regulating valve, and the gas flow can be flexibly adjusted by the manual flow regulating valve. With the high-sensitivity flow meter and pressure display, data is fed back in real time. The PLC controller automatically completes data acquisition and judgment, avoiding errors from manual reading and ensuring the consistency and reliability of the test results.

[0018] 3. In this invention, the placement cylinder of the auxiliary components can stably fix the evaporator body, the gas pipe connector of the connecting seat can achieve a quick and sealed connection of the gas path, and the switching operation of the dosing plug and the ceramic valve is convenient, adapting to the testing needs of different parts. The display and operating components on the surface of the chassis are clearly laid out, and operators can start the test by simple login and button triggering, without the need for complex professional skills, thus lowering the operating threshold.

[0019] 4. In this invention, the pneumatic triplet inside the chassis filters and reduces the pressure of compressed air, preventing impurities and pressure fluctuations from damaging the internal solenoid valves and sensors. The linkage control between the PLC controller and the relay enables the orderly start and stop of the solenoid valves, reducing mechanical wear. The overall structure is compact and highly protective, effectively resisting dust and minor collisions on site. The equipment can operate continuously without failure for a long time, ensuring the continuity of testing work.

[0020] 5. In this invention, during the testing process, key data such as leakage flow rate and air resistance pressure are displayed in real time on the corresponding instruments, and the qualified or unqualified results are clearly marked, which facilitates quick judgment by operators. The test data can be stored synchronously, providing a basis for subsequent quality traceability and problem investigation, helping enterprises to form a complete quality control closed loop and improve the factory qualification rate of evaporator products. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an evaporator testing fixture according to the present invention;

[0022] Figure 2 This is a side view of the evaporator testing fixture of the present invention.

[0023] Figure 3 This is a schematic diagram of the internal structure of an evaporator testing fixture according to the present invention;

[0024] Figure 4 This invention relates to an evaporator testing fixture. Figure 3 A schematic diagram of the side view structure;

[0025] Figure 5 This is a partial structural diagram of an evaporator testing fixture according to the present invention;

[0026] Figure 6 This invention relates to an evaporator testing fixture. Figure 5 A schematic diagram of the structure viewed from below.

[0027] In the diagram: 1. Chassis; 2. Evaporator body; 3. Ceramic valve; 4. Detection components; 41. Air tightness pressure regulating value display table; 42. Air tightness inlet pressure regulating valve; 43. Leakage flow display table; 44. Air tightness flow display table; 45. Air resistance pressure regulating value display table; 46. Air resistance inlet pressure regulating valve; 47. Manual flow regulating valve; 48. Power indicator light; 49. Air resistance pressure display table; 410. First solenoid valve; 411. Second solenoid valve; 412. Third solenoid valve ; 413, Fourth Solenoid Valve; 414, Fifth Solenoid Valve; 415, Sixth Solenoid Valve; 416, Seventh Solenoid Valve; 417, Relay; 418, Signal Transfer Module; 419, PLC Controller; 420, Power Supply Module; 421, Power Supply Interface; 422, Air Outlet; 423, Air Inlet; 424, Pneumatic Triple Unit; 5, Auxiliary Components; 51, Bracket; 52, Placement Cylinder; 53, Connecting Seat; 54, Adjusting Nut; 55, Dosing Plug. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] refer to Figures 1-6 The evaporator testing fixture shown includes a casing 1 and an evaporator body 2. A detection component 4 is installed inside the casing 1, and an auxiliary component 5 is installed on one side of the casing 1. The evaporator body 2 is installed inside the auxiliary component 5. A ceramic valve 3 is installed on the upper surface of the evaporator body 2. The detection component 4 includes an airtight pressure regulating value display meter 41, which is installed on the surface of the casing 1. An airtight inlet pressure regulating valve 42 is installed on the surface of the casing 1. A leakage flow display meter 43 for displaying the flow rate of the ceramic valve 3 is installed on the surface of the casing 1. An airtight flow display meter 44 is installed on the surface of the casing 1. The device is equipped with a gas resistance pressure display meter 45, a gas resistance inlet pressure regulating valve 46, a manual flow regulating valve 47, a power indicator light 48, and a gas resistance pressure display meter 49. The test pressure is precisely set through the gas-tight inlet pressure regulating valve 42 and the gas resistance inlet pressure regulating valve 46. The manual flow regulating valve 47 can flexibly adjust the gas flow. With the high-sensitivity flow meter and pressure display meter, data is fed back in real time. The PLC controller 419 automatically completes data acquisition and judgment, avoiding human reading errors and ensuring the consistency and reliability of the test results.

[0030] The first solenoid valve 410, the second solenoid valve 411, the third solenoid valve 412, the fourth solenoid valve 413, the fifth solenoid valve 414, the sixth solenoid valve 415, and the seventh solenoid valve 416 are installed inside the chassis 1. The fixture integrates leakage testing and temperature-compensated gas resistance testing functions. It can complete multi-dimensional index testing with a single clamping without disassembling the equipment or changing the fixture. Compared with traditional single-function testing equipment, it reduces equipment switching and repeated component positioning, effectively improves testing efficiency, and adapts to the batch testing needs of large-scale production.

[0031] The chassis 1 contains a relay 417, a signal conversion module 418, a PLC controller 419, and a power supply module 420. The input terminals of the first solenoid valve 410, the second solenoid valve 411, the third solenoid valve 412, the fourth solenoid valve 413, the fifth solenoid valve 414, the sixth solenoid valve 415, and the seventh solenoid valve 416 are all electrically connected to the output terminal of the relay 417. The output terminal of the PLC controller 419 is electrically connected to the input terminal of the relay 417. The input terminal of the signal conversion module 418 is electrically connected to the output terminal of the PLC controller 419. The output terminal of the power supply module 420 is electrically connected to the input terminal of the PLC controller 419.

[0032] The power supply interface 421 is installed at the rear of the chassis 1. The output end of the power supply interface 421 is electrically connected to the input end of the power supply module 420 to supply energy to the equipment.

[0033] Among them, the side of the chassis 1 near the power supply interface 421 is equipped with an air outlet 422 and the side of the chassis 1 near the power supply interface 421 is equipped with an air inlet 423. During the test, key data such as leakage flow and air resistance pressure are displayed in real time on the corresponding instruments. The qualified or unqualified results are clearly marked, which makes it easy for operators to make quick judgments. The test data can be stored synchronously, providing a basis for subsequent quality traceability and problem investigation, helping enterprises to form a complete quality control closed loop and improve the factory qualification rate of evaporator products.

[0034] Among them, a pneumatic triplet 424 is installed on the side of the chassis 1 near the air outlet 422. The pneumatic triplet 424 inside the chassis 1 filters and reduces the pressure of compressed air to prevent impurities and pressure fluctuations from damaging the internal solenoid valves and sensors. The linkage control of the PLC controller 419 and the relay 417 realizes the orderly start and stop of the solenoid valves, reduces mechanical wear, and has a compact overall structure with strong protection. It can effectively resist dust and minor collisions on site. The equipment can run continuously without failure for a long time, ensuring the continuity of the testing work.

[0035] The auxiliary component 5 includes a bracket 51 located on one side of the chassis 1. A placement cylinder 52 is mounted on the upper surface of the bracket 51, into which the evaporator body 2 is placed. The placement cylinder 52 of the auxiliary component 5 stably secures the evaporator body 2. The gas pipe connector of the connecting seat 53 enables a quick and sealed gas path connection. The switching operation between the dosing plug 55 and the ceramic valve 3 is convenient and adaptable to the testing needs of different locations. The display and operating components on the surface of the chassis 1 are clearly laid out. Operators can start the test simply by logging in and pressing buttons, requiring no complex professional skills and lowering the operating threshold.

[0036] One side of the placement cylinder 52 is fixedly connected to a connecting seat 53, and a gas pipe connector is provided on the connecting seat 53. The gas pipe connector on the connecting seat 53 achieves a sealed connection between the evaporator body 2 and the casing 1 to ensure that there is no gas leakage. According to the test requirements, the dosing plug 55 is installed or removed, and the opening or closing state of the ceramic valve 3 is switched to prepare for leakage tests in different parts.

[0037] An adjusting nut 54 is provided at the bottom of the placement cylinder 52.

[0038] A dosing plug 55 is installed on one side of the placement cylinder 52.

[0039] Working principle of this invention: Power is connected to the power supply interface 421 at the rear of the chassis 1. The power supply module 420 supplies power to core components such as the PLC controller 419 and relay 417. When the power indicator light 48 lights up, the equipment completes self-test. The main air supply switch is turned on, and compressed air enters the chassis 1 through the air inlet 423. It is filtered and depressurized by the pneumatic triplet 424 to ensure a stable air supply. The operator presets the detection parameters through the display and pressure regulating valve on the surface of the chassis 1: the air tightness pressure regulation value for leakage test is set to 20Kpa, and the air resistance pressure regulation value for air resistance test is set to 500Kpa. At the same time, the gas flow range is initially set through the manual flow regulating valve 47. The parameter information is synchronously transmitted to the PLC controller 419.

[0040] Place the evaporator body 2 into the placement cylinder 52 of the auxiliary component 5, and achieve a sealed connection between the evaporator body 2 and the gas circuit of the casing 1 through the gas pipe connector on the connecting seat 53 to ensure that there is no gas leakage. According to the test requirements, install or remove the dosing plug 55, switch the opening or closing state of the ceramic valve 3, and prepare for leakage tests in different parts.

[0041] Install the dosing plug 55 and open the ceramic valve 3. The PLC controller 419 controls the first solenoid valve 410 to open via the relay 417. Compressed air is regulated to 20 kPa by the airtight inlet pressure regulating valve 42 and then pressurizes the chemical tank for 10 seconds. Then, the first solenoid valve 410 is closed and the second solenoid valve 411 and the third solenoid valve 412 are opened. The micro-flow meter begins to collect leakage flow data within 50 seconds and displays it in real time through the leakage flow display table 43. If the leakage is ≤10 ml / min, it is considered qualified.

[0042] Remove the dosing plug 55 and close the ceramic valve 3. Repeat the above inflation process and collect leakage data through the airtight flow display table 44. Similarly, the leakage rate ≤10ml / min is taken as the qualified standard.

[0043] Open ceramic valve 3 and remove dosing plug 55 to connect the tooling to the atmosphere. After starting the test, collect the leakage flow rate. If the flow rate is >150ml / min, the ceramic valve 3 is considered to be functioning normally.

[0044] Turn off the evaporator and loosen the air inlet pipe on one side of the evaporator body 2. The PLC controller 419 controls the fourth and fifth solenoid valves 414 to open. The compressed air is adjusted to 500 kPa through the air resistance inlet pressure regulating valve 46. The flow rate is adjusted to 5 L / min through the manual flow regulating valve 47. Adjust the adjusting nut 54 at the bottom of the placement cylinder 52 and observe the air resistance pressure display 49 until the pressure stabilizes at 41.5 ± 5. Then adjust the flow rate to 2 L / min, 8 L / min, and 10 L / min in sequence. The air resistance pressure display 49 records the pressure data corresponding to each flow rate in real time. The PLC controller 419 automatically compares and determines whether it meets the test standard.

[0045] After all tests are completed, the PLC controller 419 comprehensively analyzes the collected data such as leakage flow and gas resistance pressure, and clearly marks the qualified or unqualified results on the display table. After the test, the gas source and power supply are turned off, the gas pipe connection is disconnected, and the adjusting nut 54 and the dosing plug 55 are reset. Then, a new evaporator can be replaced for the next round of testing.

[0046] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An evaporator testing fixture, comprising a casing (1) and an evaporator body (2), characterized in that: The casing (1) is equipped with a detection component (4), and an auxiliary component (5) is provided on one side of the casing (1). The evaporator body (2) is installed inside the auxiliary component (5). A ceramic valve (3) is installed on the upper surface of the evaporator body (2). The detection component (4) includes an airtight pressure regulating value display meter (41), which is installed on the surface of the casing (1). An airtight inlet pressure regulating valve (42) is installed on the surface of the casing (1). The machine is equipped with a leakage flow display (43) for displaying the flow of the ceramic valve (3), an airtight flow display (44) is installed on the surface of the chassis (1), an air resistance pressure regulation value display (45) is installed on the surface of the chassis (1), an air resistance inlet pressure regulating valve (46) is installed on the surface of the chassis (1), a manual flow regulating valve (47) is installed on the surface of the chassis (1), a power indicator light (48) is installed on the surface of the chassis (1), and an air resistance pressure display (49) is installed on the surface of the chassis (1).

2. The evaporator testing fixture according to claim 1, characterized in that: The chassis (1) is equipped with a first solenoid valve (410), a second solenoid valve (411), a third solenoid valve (412), a fourth solenoid valve (413), a fifth solenoid valve (414), a sixth solenoid valve (415), and a seventh solenoid valve (416).

3. The evaporator testing fixture according to claim 2, characterized in that: The chassis (1) is equipped with a relay (417), a signal conversion module (418), a PLC controller (419), and a power supply module (420). The input terminals of the first solenoid valve (410), the second solenoid valve (411), the third solenoid valve (412), the fourth solenoid valve (413), the fifth solenoid valve (414), the sixth solenoid valve (415), and the seventh solenoid valve (416) are all electrically connected to the output terminal of the relay (417). The output terminal of the PLC controller (419) is electrically connected to the input terminal of the relay (417). The input terminal of the signal conversion module (418) is electrically connected to the output terminal of the PLC controller (419). The output terminal of the power supply module (420) is electrically connected to the input terminal of the PLC controller (419).

4. The evaporator testing fixture according to claim 3, characterized in that: A power supply interface (421) is installed at the rear of the chassis (1), and the output end of the power supply interface (421) is electrically connected to the input end of the power supply module (420).

5. The evaporator testing fixture according to claim 4, characterized in that: An air outlet (422) is installed on the side of the chassis (1) near the power supply interface (421), and an air inlet (423) is installed on the side of the chassis (1) near the power supply interface (421).

6. The evaporator testing fixture according to claim 5, characterized in that: A pneumatic triplet (424) is installed on the side of the chassis (1) near the air outlet (422).

7. The evaporator testing fixture according to claim 1, characterized in that: The auxiliary component (5) includes a bracket (51) located on one side of the chassis (1), and a placement cylinder (52) is installed on the upper surface of the bracket (51), into which the evaporator body (2) is placed.

8. The evaporator testing fixture according to claim 7, characterized in that: A connecting seat (53) is fixedly connected to one side of the placement cylinder (52), and an air pipe connector is provided on the connecting seat (53).

9. The evaporator testing fixture according to claim 7, characterized in that: An adjusting nut (54) is provided at the bottom of the placement cylinder (52).

10. An evaporator testing fixture according to claim 7, characterized in that: A dosing plug (55) is installed on one side of the placement cylinder (52).

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