A test system for a temperature sensing element

Abstract

The application discloses a kind of temperature sensing element test system, including temperature sensing measuring device and medium circulation temperature control system, the temperature sensing measuring device includes oil passage, the inside of oil passage is provided with temperature sensing element, the temperature sensing end of temperature sensing element is elongated or shortened with temperature change, the temperature sensing end of temperature sensing element is connected with the measuring rod of micrometer;The medium circulation temperature control system includes cooling part and heating part, the oil outlet end of cooling part and the oil outlet end of heating part are connected with oil passage;The application can accurately regulate and control the temperature of medium in real time, then the medium is transported to the inside of oil passage isolated from external environment, and then the temperature of medium makes the temperature sensing end of temperature sensing element inside oil passage move, and the displacement of temperature sensing end of temperature sensing element is accurately detected.

Description

Technical Field

[0001] This invention belongs to the technical field of temperature sensing element detection, and relates to a testing system for temperature sensing elements. Background Technology

[0002] A temperature sensing element is a combination of a wax-type temperature sensor and a thermal actuator, possessing the dual functions of receiving temperature change signals and outputting action. The temperature sensing element senses the temperature of the medium, causing its internal movable rod to extend or retract. To determine whether the movement of the movable rod matches the current medium temperature, the temperature sensing element needs to be tested under different high and low temperature medium environments.

[0003] Traditional temperature sensing element testing devices immerse the sensing element directly in a medium at a specific temperature. The test is then completed by measuring the displacement of the moving rod of the sensing element under the current medium temperature. However, existing temperature sensing element testing devices store a fixed-temperature medium that cannot be flexibly adjusted. Changing the medium temperature requires removing the original medium and adding a new medium at a different temperature. Furthermore, the temperature of the medium stored in existing devices is easily affected by external environmental factors, causing temperature fluctuations that ultimately affect the accuracy of the final test results.

[0004] Therefore, in view of the above-mentioned defects of existing temperature sensing element testing devices, the present invention discloses a temperature sensing element testing system. Summary of the Invention

[0005] The purpose of this invention is to provide a testing system for a temperature sensing element, which can accurately control the temperature of the medium in real time, and then transport the medium to an oil passage cavity isolated from the external environment. The temperature of the medium causes the temperature sensing end of the temperature sensing element inside the oil passage cavity to move, and the displacement of the temperature sensing end of the temperature sensing element is accurately detected.

[0006] This invention is achieved through the following technical solution:

[0007] A testing system for a temperature-sensing element includes a temperature-sensing measuring device and a medium circulation temperature control system. The temperature-sensing measuring device includes an oil passage chamber, inside which a temperature-sensing element is disposed. The temperature-sensing end of the temperature-sensing element elongates or shortens with temperature changes, and the temperature-sensing end of the temperature-sensing element is connected to the measuring rod of a micrometer. The medium circulation temperature control system includes a cooling section and a heating section, and the oil outlet ends of both the cooling section and the heating section are connected to the oil passage chamber.

[0008] The medium circulation temperature control system regulates the temperature and pressure of the medium and delivers the regulated medium to the oil passage chamber of the temperature sensing device. Inside the oil passage chamber, the temperature sensing element is affected by the medium temperature, causing its sensing end to elongate or shorten in response to temperature changes. Specifically, when the medium temperature rises, the sensing end of the element elongates; when the medium temperature decreases, the sensing end shortens. This elongation or shortening of the sensing end synchronously moves the measuring rod of the micrometer, which then detects the amount of extension or contraction, thus testing the temperature sensing element.

[0009] To better realize the present invention, the temperature sensing and measuring device further includes a test frame, the top of the test frame is provided with an oil passage cavity connected to the oil outlet, the inside of the oil passage cavity is provided with a temperature sensing element, the temperature sensing end of the temperature sensing element is connected to one end of a central rod through a sliding part, and the other end of the central rod is connected to the measuring rod of a micrometer provided at the bottom of the test frame.

[0010] To better realize the present invention, the top of the test frame is provided with an oil passage cavity, the bottom of the test frame is provided with an installation cavity, a sliding hole is provided between the oil passage cavity and the installation cavity, a sliding sleeve is slidably provided at the top of the sliding hole, a positioning sleeve is fixedly provided at the bottom of the sliding hole, an elastic reset member is provided between the bottom of the sliding sleeve and the top of the positioning sleeve, the top of the sliding sleeve is connected to the temperature sensing end of the temperature sensing element, and a central rod is coaxially connected to the bottom of the sliding sleeve. The central rod passes through the positioning sleeve and is connected to the measuring rod of the micrometer.

[0011] To better realize the present invention, a sensitivity adjustment device is further provided on the outer side of the measuring rod of the micrometer. The adjustment part of the sensitivity adjustment device clamps the outer side of the measuring rod of the micrometer to adjust the friction force on the measuring rod of the micrometer.

[0012] To better realize the present invention, the sensitivity adjustment device further includes a clamping sleeve and an adjusting nut. The clamping sleeve is fitted outside the measuring rod of the micrometer. The top of the clamping sleeve is provided with a plurality of conical clamping petals along the circumferential direction. The adjusting nut is threaded on the outer side of the conical clamping petals.

[0013] To better realize the present invention, the medium circulation temperature control system further includes an oil storage tank, the oil outlet of the oil storage tank is connected to the inlet of the cooling section through a circulating oil pump, the outlet of the cooling section is connected to a compressor, the outlet of the compressor is connected to the inlet of the heating section, and the outlet of the heating section is connected to an oil passage chamber.

[0014] To better realize the present invention, the cooling section further includes an evaporator and a cooling device connected in sequence, the inlet of the evaporator is connected to a circulating oil pump, and the outlet of the cooling device is connected to a compressor.

[0015] To better realize the present invention, an expansion valve and a dryer are sequentially installed on the pipeline between the evaporator and the cooling device.

[0016] To better realize the present invention, the heating section further includes an evaporator and a heating device connected in sequence, the inlet of the evaporator is connected to the compressor, and the outlet of the heating device is connected to the oil passage chamber.

[0017] To better realize the present invention, a first temperature sensor, a pressure controller, and a second temperature sensor are further provided on the pipeline between the outlet of the heating device and the oil passage.

[0018] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0019] (1) The present invention sets up a medium circulation temperature control system, cools down the medium through the cooling part of the medium circulation temperature control system, and heats up the medium through the heating part of the fuel circulation temperature control system, thereby flexibly controlling the medium temperature finally output to the temperature sensing element, so that the medium temperature is accurate and adjustable, thereby meeting the need for the temperature sensing element to be tested under different medium temperature environments.

[0020] (2) The present invention sets up an oil passage cavity isolated from the external environment in the temperature measuring device, and introduces the medium into the oil passage cavity to avoid contact between the medium and the external environment, thereby avoiding temperature fluctuation of the medium and ensuring the accuracy of the final test of the temperature sensing element; at the same time, the present invention sets up a micrometer connected to the temperature sensing end of the temperature sensing element in the temperature measuring device, and performs high-precision detection of the displacement of the temperature sensing end of the temperature sensing element through the micrometer, thereby improving the test accuracy of the temperature sensing element. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the temperature sensing and measuring device.

[0023] Figure 3 for Figure 2 A magnified view of part A;

[0024] Figure 4 This is a schematic diagram of a medium circulation temperature control system.

[0025] Wherein: 1-Temperature measuring device; 2-Medium circulation temperature control system; 11-Temperature sensing element; 12-Micrometer; 13-Test frame; 14-Center rod; 15-Sensitivity adjustment device; 16-Sliding sleeve; 17-Positioning sleeve; 18-Elastic reset component; 151-Clamping sleeve; 152-Adjusting nut; 21-Oil tank; 22-Circulating oil pump; 23-Compressor; 241-Cooling device; 251-Heating device. Detailed Implementation

[0026] Example 1:

[0027] This embodiment provides a testing system for a temperature-sensing element, such as... Figures 1-4 As shown, the system includes a temperature sensing and measuring device 1 and a medium circulation temperature control system 2. The temperature sensing and measuring device 1 includes an oil passage chamber, inside which a temperature sensing element 11 is disposed. The temperature sensing end of the temperature sensing element 11 elongates or shortens with temperature changes, and the temperature sensing end of the temperature sensing element 11 is connected to the measuring rod of a micrometer 12. The medium circulation temperature control system 2 includes a cooling section and a heating section. The oil outlet ends of both the cooling section and the heating section are connected to the oil passage chamber.

[0028] The medium circulation temperature control system 2 is used to introduce the medium and regulate its pressure and temperature. The heating section of the system heats the medium, causing its temperature to rise, and the cooling section cools it, causing its temperature to drop. This ensures that the final temperature of the medium output to the oil passage of the temperature sensing device 1 is accurate and adjustable. The medium, after temperature and pressure regulation, is delivered to the oil passage of the temperature sensing device 1 and comes into contact with the temperature sensing element 11 inside. Under the influence of the medium temperature, the sensing end of the temperature sensing element 11 extends or shortens, thus driving the measuring rod of the micrometer 12 to move synchronously. The micrometer 12 can then indirectly read the displacement of the sensing end of the temperature sensing element 11, and use this displacement to determine whether the temperature sensing result of the temperature sensing element 11 for the corresponding medium temperature meets the standard.

[0029] Furthermore, the medium circulation temperature control system 2 can provide circulating medium with a pressure of 0.3 MPa to 1 MPa and a flow rate of 3 L / min to 15 L / min.

[0030] Example 2:

[0031] This embodiment is a further optimization based on Embodiment 1 described above, such as... Figure 2 and Figure 3As shown, the temperature sensing and measuring device 1 includes a test frame 13. The top of the test frame 13 is provided with an oil passage cavity connected to the oil outlet end. A temperature sensing element 11 is provided inside the oil passage cavity. The temperature sensing end of the temperature sensing element 11 is connected to one end of the central rod 14 through a sliding part. The other end of the central rod 14 is connected to the measuring rod of the micrometer 12 provided at the bottom of the test frame 13.

[0032] The test frame 13 has an oil passage cavity at the top and an installation cavity at the bottom. A sliding hole is provided between the oil passage cavity and the installation cavity. A sliding sleeve 16 is slidably disposed at the top of the sliding hole, and a positioning sleeve 17 is fixedly disposed at the bottom of the sliding hole. An elastic reset member 18 is provided between the bottom of the sliding sleeve 16 and the top of the positioning sleeve 17. The top of the sliding sleeve 16 is connected to the temperature sensing end of the temperature sensing element 11. A central rod 14 is coaxially connected to the bottom of the sliding sleeve 16. The central rod 14 passes through the positioning sleeve 17 and is connected to the measuring rod of the micrometer 12.

[0033] The test frame 13 has a mounting cavity at its bottom. A chassis is mounted on the top inner side of the mounting cavity via connecting bolts. A mounting base is mounted on the top of the chassis via connecting bolts. An oil passage cavity is located on the top of the mounting base, and a sliding hole is provided inside the mounting base to connect the oil passage cavity and the mounting cavity. A top cover is provided at the top opening of the oil passage cavity to close it. When it is necessary to inspect the temperature sensing element 11 inside the oil passage cavity, the oil passage cavity can be opened by opening the top cover. A sliding sleeve 16 is slidably mounted on the top inner side of the sliding hole, and a positioning sleeve 17 is fixedly mounted on the bottom inner side of the sliding hole. The top of the sliding sleeve 16 has a slot for engaging with the temperature sensing end of the temperature sensing element 11, and the bottom of the sliding sleeve 16 is connected to the top of the positioning sleeve 17 via an elastic reset member 18, which is a reset spring. A threaded hole is provided at the bottom center of the sliding sleeve 16. The threaded hole is threaded to the top of the center rod 14. The bottom end of the center rod 14 passes downward through the center hole of the positioning sleeve 17 and abuts against the end of the measuring rod of the micrometer 12.

[0034] Furthermore, the side wall of the oil passage is provided with an oil inlet, an oil return port, and an oil discharge port. The oil inlet is connected to the oil outlet of the medium circulation temperature control system 2, the oil return port is connected to the oil return port of the medium circulation temperature control system 2, and a plug is provided in the oil discharge port. In an emergency, the plug can be removed to discharge the medium inside the oil passage.

[0035] The other parts of this embodiment are the same as those in Embodiment 1, so they will not be described again.

[0036] Example 3:

[0037] This embodiment is a further optimization based on the above embodiment 1 or 2, such as... Figure 3As shown, a sensitivity adjustment device 15 is fitted onto the outer side of the measuring rod of the micrometer 12. The adjustment part of the sensitivity adjustment device 15 clamps the outer side of the measuring rod of the micrometer 12 to adjust the frictional force on the measuring rod of the micrometer 12. By adjusting the clamping force of the sensitivity adjustment device 15 on the measuring rod of the micrometer 12, the frictional force between the measuring rod of the micrometer 12 and the sensitivity adjustment device 15 when the measuring rod moves with the temperature sensing end of the temperature sensing element 11 is adjusted. The greater the frictional force, the more difficult it is for the measuring rod of the micrometer 12 to move with the temperature sensing end of the temperature sensing element 11; the smaller the frictional force, the easier it is for the measuring rod of the micrometer 12 to move with the temperature sensing end of the temperature sensing element 11. By controlling the frictional force within a suitable range, the measuring rod of the micrometer 12 can move with the temperature sensing end of the temperature sensing element 11 in a timely manner.

[0038] The sensitivity adjustment device 15 includes a clamping sleeve 151 and an adjusting nut 152. The clamping sleeve 151 is fitted outside the measuring rod of the micrometer 12. The top of the clamping sleeve 151 is provided with a plurality of conical clamping petals along the circumferential direction. The adjusting nut 152 is threaded on the outer side of the conical clamping petals.

[0039] By rotating the adjusting nut 152, the adjusting nut 152 can radially clamp or radially loosen several conical clamping petals at the top of the clamping sleeve 151. When radially clamped, the conical clamping petals clamp the measuring rod of the micrometer 12 to increase friction. When radially loosened, the conical clamping petals loosen the measuring rod of the micrometer 12 to reduce friction.

[0040] The other parts of this embodiment are the same as those in Embodiment 1 or 2 above, so they will not be described again.

[0041] Example 4:

[0042] This embodiment is a further optimization based on any one of embodiments 1-3 above, such as... Figure 4 As shown, the medium circulation temperature control system 2 includes an oil storage tank 21. The oil outlet of the oil storage tank 21 is connected to the inlet of the cooling section through a circulating oil pump 22. The outlet of the cooling section is connected to a compressor 23. The outlet of the compressor 23 is connected to the inlet of the heating section. The outlet of the heating section is connected to the oil passage chamber.

[0043] An oil inlet pipe is installed at the inlet of the oil storage tank 21. A stainless steel ball valve and a filter are installed on the inlet pipe. Opening the ball valve allows an external oil pump to pump the medium into the oil storage tank 21 for storage, while the filter removes impurities from the medium. A drain valve is installed at the bottom of the oil storage tank 21 to quickly drain the medium. The bottom of the oil storage tank 21 is connected to a circulating oil pump 22 via a pipeline. The circulating oil pump 22 transports the medium to a cooling section, where it is cooled. A temperature sensor inside the cooling section monitors the medium's temperature in real time and transmits this real-time temperature data to a monitoring terminal. The medium is then further compressed by the compressor 23 and enters a heating section, where it is heated. A temperature sensor inside the heating section also monitors the medium's temperature in real time and transmits this real-time temperature data to a monitoring terminal.

[0044] The cooling section includes an evaporator and a cooling device 241 connected in sequence. The inlet of the evaporator is connected to a circulating oil pump 22, and the outlet of the cooling device 241 is connected to a compressor 23.

[0045] The cooling device 241 can be either an air-cooled cooling device or a water-cooled cooling device, and the choice can be made according to actual needs.

[0046] An expansion valve and a dryer are sequentially installed on the pipeline between the evaporator and the cooling device 241.

[0047] The heating section includes an evaporator and a heating device 251 connected in sequence. The inlet of the evaporator is connected to the compressor 23, and the outlet of the heating device 251 is connected to the oil passage chamber.

[0048] The heating device 251 can be either an electric heating device or a heat exchange heating device, and can be selected according to actual needs.

[0049] A first temperature sensor, a pressure controller, and a second temperature sensor are installed on the pipeline between the outlet of the heating device 251 and the oil passage.

[0050] The other parts of this embodiment are the same as any one of the embodiments 1-3 above, so they will not be described again.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A testing system for a temperature sensing element, characterized in that, The system includes a temperature measuring device (1) and a medium circulation temperature control system (2). The temperature measuring device (1) includes an oil passage chamber, and a temperature sensing element (11) is provided inside the oil passage chamber. The temperature sensing end of the temperature sensing element (11) elongates or shortens with temperature changes. The temperature sensing end of the temperature sensing element (11) is connected to the measuring rod of a micrometer (12). The medium circulation temperature control system (2) includes a cooling section and a heating section. The oil outlet of the cooling section and the oil outlet of the heating section are both connected to the oil passage chamber. The temperature measuring device (1) includes a test frame (13). The top of the test frame (13) is provided with an oil passage cavity connected to the oil outlet end. The oil passage cavity is provided with a temperature sensing element (11). The temperature sensing end of the temperature sensing element (11) is connected to one end of the central rod (14) through a sliding part. The other end of the central rod (14) is connected to the measuring rod of the micrometer (12) provided at the bottom of the test frame (13). The test frame (13) has an oil passage cavity at the top and an installation cavity at the bottom. A sliding hole is provided between the oil passage cavity and the installation cavity. A sliding sleeve (16) is slidably provided at the top of the sliding hole. A positioning sleeve (17) is fixedly provided at the bottom of the sliding hole. An elastic reset member (18) is provided between the bottom of the sliding sleeve (16) and the top of the positioning sleeve (17). The top of the sliding sleeve (16) is connected to the temperature sensing end of the temperature sensing element (11). A central rod (14) is coaxially connected to the bottom of the sliding sleeve (16). The central rod (14) passes through the positioning sleeve (17) and is connected to the measuring rod of the micrometer (12).

2. The testing system for a temperature sensing element according to claim 1, characterized in that, A sensitivity adjustment device (15) is fitted on the outside of the measuring rod of the micrometer (12). The adjustment part of the sensitivity adjustment device (15) clamps the outside of the measuring rod of the micrometer (12) to adjust the friction force on the measuring rod of the micrometer (12).

3. The testing system for a temperature sensing element according to claim 2, characterized in that, The sensitivity adjustment device (15) includes a clamping sleeve (151) and an adjusting nut (152). The clamping sleeve (151) is fitted on the outside of the measuring rod of the micrometer (12). The top of the clamping sleeve (151) is provided with several conical clamping petals along the circumferential direction. The adjusting nut (152) is threaded on the outer side of the conical clamping petals.

4. A testing system for a temperature sensing element according to any one of claims 1-3, characterized in that, The medium circulation temperature control system (2) includes an oil storage tank (21). The oil outlet of the oil storage tank (21) is connected to the inlet of the cooling section through a circulating oil pump (22). The outlet of the cooling section is connected to a compressor (23). The outlet of the compressor (23) is connected to the inlet of the heating section. The outlet of the heating section is connected to the oil passage chamber.

5. The testing system for a temperature sensing element according to claim 4, characterized in that, The cooling section includes an evaporator and a cooling device (241) connected in sequence. The inlet of the evaporator is connected to a circulating oil pump (22), and the outlet of the cooling device (241) is connected to a compressor (23).

6. The testing system for a temperature sensing element according to claim 5, characterized in that, An expansion valve and a dryer are sequentially installed on the pipeline between the evaporator and the cooling device (241).

7. The testing system for a temperature sensing element according to claim 4, characterized in that, The heating section includes an evaporator and a heating device (251) connected in sequence. The inlet of the evaporator is connected to the compressor (23), and the outlet of the heating device (251) is connected to the oil passage chamber.

8. The testing system for a temperature sensing element according to claim 7, characterized in that, A first temperature sensor, a pressure controller, and a second temperature sensor are installed on the pipeline between the outlet of the heating device (251) and the oil passage.

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