Dynamic response test device for pressure sensor of commercial refrigeration system

Abstract

The utility model provides a dynamic response test device for a pressure sensor of a commercial refrigeration system, which comprises a low-temperature test bed, a test control panel, a dynamic acquisition integrator and a refrigerating unit, and is characterized in that the test control panel and the refrigerating unit are respectively and fixedly arranged above the low-temperature test bed; the test control panel and the refrigerating unit are arranged on one side of each other, and the dynamic acquisition integrator is fixedly mounted on the test control panel; according to the utility model, the parallel test of multiple sensors is realized, the test efficiency is greatly improved, the development cycle is shortened, a rapid locking and isolating mechanism is innovated to ensure the sealing performance of the low-temperature chamber, the heat exchange is minimized when the sensors are replaced, the energy is saved, the test interval is shortened, and the remarkable advantages of high efficiency and energy conservation are shown.

Description

Technical Field

[0001] The utility model belongs to the technical field of dynamic testing of pressure sensors, and particularly relates to a dynamic response test device for pressure sensors in a commercial refrigeration system. Background Technique

[0002] In the process of research and development and quality control of commercial refrigeration systems, the dynamic response characteristic test of pressure sensors plays a crucial role. These sensors need to have the ability to stably and accurately sense and transmit pressure information in extremely low-temperature and dynamically changing working environments. However, the traditional low-temperature dynamic response test device for pressure sensors has certain limitations in design and is difficult to meet the requirements of modern commercial refrigeration systems for efficient and accurate testing.

[0003] Specifically, the traditional device often needs to monitor the pressure changes at multiple positions simultaneously, which requires the test device to be able to process the data of multiple sensors at the same time. However, the traditional device is often limited by the number of test channels or the design of the test process and cannot achieve efficient parallel testing, thus prolonging the overall test cycle and increasing the test cost.

[0004] In addition, when replacing the sensor for a new round of testing, the traditional device also faces the problem of being damaged in the low-temperature environment stability. Since the sensor needs to be taken out of the low-temperature environment and replaced, the temperature in the low-temperature chamber will inevitably fluctuate during this process, thereby breaking the original temperature balance. In order to restore the low-temperature environment required for testing, it is necessary to perform the cooling operation again, which not only consumes a large amount of energy, but also prolongs the test interval and reduces the test efficiency.

[0005] Therefore, it is very necessary to invent a dynamic response test device for pressure sensors in a commercial refrigeration system. Content of the Utility Model

[0006] In order to solve the above technical problems, the utility model provides a dynamic response test device for pressure sensors in a commercial refrigeration system, including a low-temperature test bench, a test control panel, a dynamic acquisition integrator and a refrigeration unit. The test control panel and the refrigeration unit are respectively and fixedly installed above the low-temperature test bench. The test control panel and the refrigeration unit are arranged on one side of each other, and the dynamic acquisition integrator is fixedly installed on the test control panel;

[0007] The low-temperature test bench includes a test chassis, a low-temperature chamber, a sealing frame, a rotating base, a servo motor, a plugging door, a bearing platform, a sealing strip, a positioning hole, and a sealing lining. Above the test chassis, a test control panel and a refrigeration unit are respectively and fixedly installed. Inside the test chassis, the low-temperature chamber is provided. On the inner wall of the opening of the low-temperature chamber, the sealing frame is provided, and the rotating base is rotatably installed. Any end of the rotating base rotates through the test chassis and is fixed to the output end of the servo motor fixedly installed outside the test chassis. On the rotating base, the plugging door and the bearing platform are fixedly installed, and the sealing strips are provided on both the plugging door and the bearing platform. Inside the positioning hole provided on the bearing platform, the sealing lining is nested.

[0008] The dynamic acquisition integrator is mainly composed of a sine pressure emitter, a data acquisition module, and a controller. The output port of the sine pressure emitter and the receiving port of the data acquisition module are arranged on the test control panel, and the ports of both are connected to the pressure sensor through a wire harness.

[0009] Preferably, the overall structure of the test chassis is a rectangular body. At the four corners of the lower part of the test chassis, support legs are respectively installed. The low-temperature chamber provided in the test chassis is communicated with the cold air output end of the refrigeration unit.

[0010] Preferably, the rotating base is located below the opening of the low-temperature chamber. The servo motor controls the forward and reverse rotation of the rotating base, and thus controls the rotation direction of the plugging door and the bearing platform. There is a 90-degree angle between the plugging door and the bearing platform. In the vertical state, the plugging door or the bearing platform is in close contact with the surface of the sealing frame through the sealing strip.

[0011] Preferably, the shape of the positioning hole matches the shape of the root of the pressure sensor, and the shapes of the positioning hole and the sealing lining fit each other. The sealing lining is sleeved on the root of the pressure sensor. The root of the pressure sensor passes through the positioning hole and is connected to the port of the dynamic acquisition integrator through a wire harness.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model can accommodate the tests of multiple pressure sensors at the same time, effectively solving the problem that traditional equipment is difficult to handle multiple sensor tests in parallel. This design not only greatly improves the test efficiency, but also reduces the time delay caused by testing one by one, allowing researchers to obtain comprehensive data samples more quickly and accelerate the product development cycle. In addition, the device innovatively introduces a quick locking and isolation mechanism. The structural design of the blocking door and the carrier platform can ensure that the opening of the low-temperature chamber always has a sealing structure (blocking door or carrier platform), and the sensor to be tested can be replaced safely and quickly without destroying the overall temperature balance of the low-temperature chamber to the greatest extent. Minimized heat exchange for sensor replacement is achieved, thereby avoiding unnecessary energy waste and significantly shortening the test interval. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model.

[0016] Figure 3 It is another overall structural schematic diagram of the utility model.

[0017] In the figure:

[0018] Low temperature test bench 1, test chassis 11, low temperature chamber 12, sealing frame 13, swivel seat 14, servo motor 15, blocking door 16, bearing platform 17, sealing strip 18, positioning hole 19, sealing lining 10, test control panel 2, dynamic acquisition integrator 3, refrigeration unit 4. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be described clearly and completely below. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0020] In the description of the embodiments, it should be noted that the orientation or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front end", "back end", "both ends", "one end", "the other end", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] As shown in the attached Figure 1 to the attached Figure 3 figures:

[0022] The dynamic response test device for the pressure sensor of the commercial refrigeration system provided by the present utility model includes a low-temperature test bench 1, a test control panel 2, a dynamic acquisition integrator 3, and a refrigeration unit 4. The test control panel 2 and the refrigeration unit 4 are respectively and fixedly installed above the low-temperature test bench 1. The test control panel 2 and the refrigeration unit 4 are arranged on one side of each other, and the dynamic acquisition integrator 3 is fixedly installed on the test control panel 2.

[0023] The low-temperature test bench 1 includes a test chassis 11, a low-temperature chamber 12, a sealing frame 13, a rotating base 14, a servo motor 15, a plugging door 16, a bearing table 17, a sealing strip 18, a positioning hole 19, and a sealing lining 10. The test control panel 2 and the refrigeration unit 4 are respectively and fixedly installed above the test chassis 11. The low-temperature chamber 12 is opened inside the test chassis 11. The inner wall of the opening of the low-temperature chamber 12 is provided with the sealing frame 13, and the rotating base 14 is rotatably installed. Any end of the rotating base 14 rotates through the test chassis 11 and is fixed to the output end of the servo motor 15 fixedly installed outside the test chassis 11. The plugging door 16 and the bearing table 17 are fixedly installed on the rotating base 14. The sealing strip 18 is provided on both the plugging door 16 and the bearing table 17. The sealing lining 10 is nested inside the positioning hole 19 provided on the bearing table 17.

[0024] The dynamic acquisition integrator 3 mainly integrates three key parts: a sine pressure emitter, a data acquisition module, and a controller. The sine pressure emitter is responsible for simulating the dynamically changing pressure environment in a commercial refrigeration system, and its output port is directly set on the test control panel 2 for easy connection with the pressure sensor. The data acquisition module is responsible for capturing the response data of the sensor under dynamic pressure in real time. Its receiving port is also located on the control panel 2 and is connected to the sensor through a precise wire harness to ensure accurate and stable data transmission. The controller intelligently regulates the entire acquisition process to ensure the smooth progress of the test.

[0025] Furthermore, the test chassis 11 adopts a stable rectangular structure design, and support legs are installed at the four corners of the bottom to enhance the overall stability. Inside the test chassis 11, there is a low-temperature chamber 12, which is closely connected to the cold air output end of the refrigeration unit 4 through a pipeline to ensure that the required low-temperature test environment can be quickly and stably achieved.

[0026] Furthermore, the turntable 14 is cleverly installed below the opening of the low-temperature chamber 12 and can rotate forward and backward through the precise control of the servo motor 15, thereby driving the rotation of the sealing door 16 and the carrier table 17. There is a 90-degree angle between the two to ensure seamless switching when replacing the sensor. When the sealing door 16 is in the vertical state, it is closely attached to the sealing frame 13 through the sealing strip 18 to effectively isolate external heat; when the carrier table 17 rotates to the working position, it is used to support and fix the sensor to be tested.

[0027] Furthermore, the shape of the positioning hole 19 perfectly matches the root of the pressure sensor to ensure that the sensor can be accurately installed in place. The sealing lining 10 is tightly sleeved on the root of the sensor to further enhance the sealing effect. After the root of the sensor passes through the positioning hole 19, it is connected to the port of the dynamic acquisition integrator 3 through a wire harness to complete the construction of the entire test link. This design not only simplifies the installation process of the sensor but also improves the reliability and accuracy of the test.

[0028] The working principle is as follows: After the device is started, the refrigeration unit 4 starts to work, conveys cold air into the low-temperature chamber 12 through a pipeline, and quickly reduces the chamber temperature to the preset low-temperature range to simulate the low-temperature environment of a commercial refrigeration system. At the same time, the sine pressure emitter in the dynamic acquisition integrator 3 starts to work, simulates the dynamically changing pressure signal in the refrigeration system, and transmits the signal to the connection point on the test control panel 2 through its output port.

[0029] During the test, the pressure sensor to be measured is installed on the carrier table 17, and its root passes through the positioning hole 19 and fits tightly with the sealing lining 10 to ensure the sealing between the sensor and the test environment and fix it in place. The sensor is connected to the data acquisition module receiving port of the dynamic acquisition integrator 3 through a wire harness to capture the response data of the sensor under dynamic pressure in real time. The controller then intelligently regulates the output signal of the sine pressure emitter according to the preset test parameters to ensure the stability and accuracy of the test process.

[0030] The workflow is as follows:

[0031] Preparation stage: First, start the refrigeration unit 4 to pre-cool the low-temperature chamber 12 until the low-temperature environment required for the test is reached. At the same time, check whether all components of the dynamic acquisition integrator 3 are working properly, including the sine pressure emitter, data acquisition module, and controller.

[0032] Install the sensor: After the temperature of the low-temperature chamber 12 stabilizes, control the turntable 14 to rotate through the servo motor 15 so that the carrier table 17 rotates to the working position. At this time, install the pressure sensor to be measured on the carrier table 17, ensure that its root passes through the positioning hole 19 and fits tightly with the sealing lining 10, reverse the servo motor 15, and the carrier table 17 moves to the opening of the low-temperature chamber 12, and the detection end of the pressure sensor is located inside the low-temperature chamber 12. Subsequently, connect the sensor to the data acquisition module of the dynamic acquisition integrator 3 through a wire harness.

[0033] Start the test: After all preparations are completed, start the test program through the test control panel 2. The sine pressure emitter starts to emit an analog dynamic pressure signal, and the sensor generates a corresponding response after receiving the signal. The data acquisition module captures these response data in real time and performs intelligent processing and analysis through the controller.

[0034] Replace the sensor: When a round of testing is completed, if a new sensor needs to be replaced for testing, control the turntable 14 to rotate through the servo motor 15 so that the plugging door 16 rotates to the vertical state and fits tightly with the sealing frame 13 through the sealing strip 18 to isolate external heat. At this time, the measured sensor can be safely removed from the carrier table 17 and a new sensor can be installed for testing.

[0035] End the test: After all sensor tests are completed, turn off the refrigeration unit 4 and the dynamic acquisition integrator 3, organize the test data, and perform subsequent data analysis and report preparation work.

[0036] Any technical solution using the technical solution described in the present utility model, or a technical solution designed by those skilled in the art inspired by the technical solution of the present utility model and achieving the above technical effects falls within the protection scope of the present utility model.

Claims

1. Commercial refrigeration system pressure sensor dynamic response test device, characterized in that, It includes a low-temperature test bench (1), a test control panel (2), a dynamic acquisition integrator (3), and a refrigeration unit (4). The test control panel (2) and the refrigeration unit (4) are respectively and fixedly installed above the low-temperature test bench (1). The test control panel (2) and the refrigeration unit (4) are arranged on one side of each other. The dynamic acquisition integrator (3) is fixedly installed on the test control panel (2); The low-temperature test bench (1) includes a test chassis (11), a low-temperature chamber (12), a sealing frame (13), a rotating base (14), a servo motor (15), a plugging door (16), a bearing platform (17), a sealing strip (18), a positioning hole (19), and a sealing lining (10). The test control panel (2) and the refrigeration unit (4) are respectively and fixedly installed above the test chassis (11). The low-temperature chamber (12) is opened inside the test chassis (11). The inner wall of the opening of the low-temperature chamber (12) is provided with the sealing frame (13), and the rotating base (14) is rotatably installed. Any end of the rotating base (14) rotatably passes through the test chassis (11) and is fixed to the output end of the servo motor (15) fixedly installed outside the test chassis (11). The plugging door (16) and the bearing platform (17) are fixedly installed on the rotating base (14). The sealing strip (18) is arranged on both the plugging door (16) and the bearing platform (17); The sealing lining (10) is nested inside the positioning hole (19) arranged on the bearing platform (17); The dynamic acquisition integrator (3) is mainly composed of a sine pressure transmitter, a data acquisition module, and a controller. The output port of the sine pressure transmitter and the receiving port of the data acquisition module are arranged on the test control panel (2), and the ports of both are connected to the pressure sensor through a wire harness.

2. The dynamic response test device for the pressure sensor of the commercial refrigeration system according to claim 1, wherein: The test chassis (11) is of a rectangular structure as a whole. Support legs are respectively installed at the four corners below the test chassis (11). The low-temperature chamber (12) arranged in the test chassis (11) is communicated with the cold air output end of the refrigeration unit (4).

3. The dynamic response test device for the pressure sensor of the commercial refrigeration system according to claim 1, wherein: The rotating base (14) is located below the opening of the low-temperature chamber (12). The servo motor (15) controls the rotation direction of the plugging door (16) and the bearing platform (17) by controlling the forward and reverse rotation of the rotating base (14). There is a ninety-degree angle between the plugging door (16) and the bearing platform (17). When in a vertical state, the plugging door (16) or the bearing platform (17) is in close contact with the surface of the sealing frame (13) through the sealing strip (18).

4. The dynamic response test device for the pressure sensor of the commercial refrigeration system according to claim 1, characterized in that: The shape of the positioning hole (19) matches the shape of the root of the pressure sensor. The shapes of the positioning hole (19) and the sealing lining (10) fit each other. The sealing lining (10) is sleeved on the root of the pressure sensor. The root of the pressure sensor passes through the positioning hole (19) and is connected to the port of the dynamic acquisition integrator (3) through a wire harness.

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