Medium temperature control system for workpiece testing and workpiece temperature load testing device

Abstract

The utility model provides a medium temperature control system used for workpiece testing and a workpiece temperature load testing device, the medium temperature control system comprises a first loop, a second loop and a heat exchanger, the first loop is provided with a heating module used for heating a testing medium; the regulating valve is arranged in the second loop and used for regulating the amount of the refrigerating medium entering the heat exchanger. When the test medium is heated, the heating module is directly used for heating, and the refrigeration medium in the second loop does not need to be heated firstly and then heat exchange is carried out. The refrigerating medium in the second loop is always in a low-temperature state, so that when the test medium is converted from a high-temperature state to a low-temperature state, the problems that the temperature of the refrigerating medium is greatly changed and the energy consumption is too high due to the fact that the test medium is cooled after a large amount of heat exchange medium is cooled as before are solved; the heating power and the refrigerating power are both reduced by half, and the energy utilization efficiency of the whole cooling process is improved.

Description

Technical Field

[0001] This utility model belongs to the field of temperature control technology, and in particular relates to a medium temperature control system and a workpiece temperature load testing device for workpiece testing. Background Technology

[0002] In automotive component testing, reliability testing of the internal media under high and low temperature loads is often required. The existing method involves cooling the test medium in the first loop. The test medium in the first loop carries heat as it flows through a heat exchanger. Since the temperature of the test medium in the first loop is higher than that of the heat exchange medium in the second loop, the heat from the first loop is transferred to the heat exchange medium in the second loop through the heat exchanger's walls, thus cooling the test medium in the first loop. Conversely, if heating is required for the test medium in the first loop, the heat exchange medium in the second loop is at a higher temperature than the test medium in the first loop. Heat will then transfer from the second loop to the first loop, causing the temperature of the test medium in the first loop to rise.

[0003] Existing methods for heating or cooling the test medium in the first loop require first changing the temperature of the heat exchange medium, and then using a heat exchanger to exchange heat between the heat exchange medium and the test medium to achieve temperature regulation of the test medium. Because this involves a large amount of temperature change of the heat exchange medium and the corresponding energy consumption, the entire system has low energy utilization efficiency and a serious energy waste problem. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a medium temperature control system and a workpiece temperature load testing device for workpiece testing, so as to solve the problem of energy waste caused by raising or lowering the temperature of the heat exchange medium and then raising or lowering the temperature of the test medium accordingly through the heat exchanger.

[0005] To achieve the above and other related objectives, in one aspect, this utility model provides a medium temperature control system for a medium temperature load testing device for workpiece testing, characterized in that it includes:

[0006] The first circuit flows through the workpiece to be tested to supply the test medium to the workpiece. The first circuit is equipped with a heating module for heating the test medium in the first circuit.

[0007] The second circuit is equipped with a refrigeration module for cooling the refrigerant in the second circuit;

[0008] a heat exchanger, the first circuit and the second circuit passing through the heat exchanger respectively, and the test medium in the first circuit and the refrigerant medium in the second circuit exchanging heat in the heat exchanger;

[0009] a regulating valve arranged in the second circuit, the regulating valve being used for regulating the amount of refrigerant medium in the second circuit entering the heat exchanger.

[0010] Further, the second circuit comprises a first branch circuit and a second branch circuit in parallel, an inlet of the first branch circuit and an inlet of the second branch circuit being communicated with an outlet of the refrigerant module respectively, an outlet of the first branch circuit and an outlet of the second branch circuit being communicated with an inlet of the refrigerant module respectively, the first branch circuit passing through the heat exchanger and exchanging heat in the heat exchanger, and the regulating valve being used for regulating the flow amount of refrigerant medium in the first branch circuit.

[0011] Further, the regulating valve is a three-way valve, an inlet of the regulating valve being communicated with the outlet of the refrigerant module, one outlet of the regulating valve being communicated with the inlet of the first branch circuit, and the other outlet of the regulating valve being communicated with the outlet of the first branch circuit.

[0012] Further, the three-way valve is a proportional three-way valve.

[0013] Further, the first circuit is provided with a first pressure sensor and a second pressure sensor, the first pressure sensor being used for detecting the pressure of the first circuit at the inlet of the heat exchanger, and the second pressure sensor being used for detecting the pressure of the first circuit at the outlet of the heat exchanger.

[0014] Further, the first circuit is provided with a first throttling valve.

[0015] Further, the first circuit is provided with a temperature sensor.

[0016] Further, the second circuit is provided with a circulating pump.

[0017] Further, the second circuit is provided with a second throttling valve, the second throttling valve being located between the second end of the regulating valve and the heat exchanger.

[0018] In another aspect, the present application provides a workpiece temperature load test device, comprising the medium temperature control system.

[0019] As described above, the utility model has the following beneficial effects: the heating module is added between the automobile parts and the heat exchanger, when the test medium is heated, the heating module is directly used for heating, and the refrigeration medium in the second loop is not heated first and then heat exchanged. The refrigeration medium in the second loop is always in a low-temperature state, when the test medium is cooled, the problem that the refrigeration medium temperature changes greatly and the energy consumption is too large caused by the previous cooling of a large amount of heat exchange medium before the test medium is cooled is avoided, the flow of the refrigeration medium only needs to be adjusted, the cooling operation can be efficiently completed according to the current temperature of the test medium and the expected cooling amplitude, the additional consumption of energy is greatly reduced, the heating power and the refrigeration power are both reduced by half, and the energy utilization efficiency of the whole cooling process is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The utility model provides a structure schematic diagram for medium temperature control system for workpiece test.

[0021] Part number explanation

[0022] 1 - workpiece to be tested, 2 - first loop, 3 - second loop, 31 - first branch, 32 - second branch, 4 - heat exchanger, 5 - heating module, 6 - regulating valve, 7 - first pressure sensor, 8 - second pressure sensor, 9 - temperature sensor, 10 - first throttle valve, 11 - second throttle valve, 12 - circulating pump, 13 - refrigeration module. DETAILED DESCRIPTION

[0023] The following specific embodiments illustrate the embodiments of the utility model, and those skilled in the art can easily understand other advantages and effects of the utility model from the disclosed content of the specification.

[0024] It should be understood that the structure, proportion, size and the like shown in the drawings attached to the specification are only used to cooperate with the disclosed content of the specification for understanding and reading by those skilled in the art, and are not used to limit the limiting conditions that the utility model can be implemented, so they do not have technical substantive significance, any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that the utility model can produce, should still fall within the scope covered by the disclosed technical content of the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" in the specification are only for the convenience of clear understanding of the description, and are not used to limit the scope of the utility model that can be implemented, the change or adjustment of relative relationship, without substantially changing the technical content, is also regarded as the scope of the utility model that can be implemented.

[0025] In order to be able to describe the utility model in detail, first, next, the utility model provides a medium temperature control system for workpiece test is specifically explained.

[0026] As Figure 1 The utility model provides a medium temperature control system for workpiece test, it includes first loop 2 and second loop 3, be provided with heat exchanger 4 between first loop 2 and second loop 3, the heat of first loop 2 and second loop 3 is replaced by heat exchanger 4, and the heat of test medium and refrigeration medium is exchanged, so that the temperature of test medium changes.

[0027] First loop 2 flows through the workpiece to be tested 1 to supply test medium to the workpiece to be tested 1, and a heating module 5 is arranged on the first loop 2 for heating the test medium in the first loop 2. A refrigeration module 13 is arranged on the second loop 3 for refrigerating the refrigeration medium in the second loop 3. The second loop 3 communicates the heat exchanger 4 with the refrigeration module 13. The first loop 2 and the second loop 3 pass through the heat exchanger 4 respectively, and the test medium in the first loop 2 and the refrigeration medium in the second loop 3 exchange heat in the heat exchanger 4

[0028] An adjusting valve 6 is arranged in the second loop 3, and the adjusting valve 6 is used to adjust the amount of refrigeration medium entering the heat exchanger 4 in the second loop 3. The refrigeration module 13 stores the refrigeration medium. A heating module 5 is arranged in the first loop 2, and when the test medium in the first loop 2 needs to be warmed up, the heating module 5 is directly used to warm up the test medium.

[0029] The utility model sets up the heating module 5 in the first loop 2 and sets up the adjusting valve 6 in the second loop 3, when the temperature of the test medium needs to be reduced, the heating module 5 in the first loop 2 is not started, at this time, the adjusting valve 6 in the second loop 3 mainly plays a role. The adjusting valve 6 can adjust the amount of refrigeration medium entering the heat exchanger 4, and after the refrigeration medium enters the heat exchanger 4, it exchanges heat with the test medium in the first loop 2. Since the temperature of the refrigeration medium is relatively low, by adjusting the amount of refrigeration medium through the adjusting valve 6, the corresponding heat can be absorbed from the test medium, thereby realizing accurate control of the temperature of the test medium. When the test medium needs to be warmed up, the adjusting valve 6 of the second loop 3 can be directly closed, at this time, the refrigeration medium in the second loop 3 no longer participates in the heat exchange process, but directly heats and warms up the test medium through the heating module 5 arranged in the first loop 2. This way is simple and direct, and can quickly increase the temperature of the test medium.

[0030] The second circuit 3 comprises a first branch 31 and a second branch 32 in parallel, the inlet of the first branch 31 and the inlet of the second branch 32 are communicated with the outlet of the refrigeration module respectively, the outlet of the first branch 31 and the outlet of the second branch 32 are communicated with the inlet of the refrigeration module respectively, the first branch 31 passes through the heat exchanger and exchanges heat in the heat exchanger, and the adjusting valve 6 is used for adjusting the flow of the refrigeration medium in the first branch 31. It is equivalent to that the refrigeration medium flowing out of the refrigeration module 13 is divided into two parts before entering the heat exchanger 4, and the amount of the refrigeration medium entering the heat exchanger 4 is accurately adjusted.

[0031] In some embodiments, the adjusting valve 6 is a three-way valve arranged at the connection between the first branch 31 and the second branch 32. Further, the adjusting valve 6 is a proportional three-way valve, which can adjust the proportion of the refrigeration medium at the two outlets, the inlet of the adjusting valve 6 is communicated with the outlet of the refrigeration module 13, one outlet of the adjusting valve 6 is communicated with the inlet of the first branch 31, and the other outlet of the adjusting valve 6 is communicated with the outlet of the first branch 31. The amount of the refrigeration medium entering the first branch 31 and the second branch 32 can be accurately controlled. The amount of the refrigeration medium entering the heat exchanger 4 is controlled by the adjusting valve 6, and the temperature of the test medium in the first circuit 2 is controlled by the heating module 5. That is, while the heating module 5 heats the test medium, the appropriate amount of refrigeration medium with relatively low temperature can be introduced according to the actual situation, and the fine adjustment of the temperature of the test medium is realized by the synergistic effect of the two. For example, when the test medium is close to the target temperature but still needs to be adjusted, the appropriate amount of refrigeration medium can prevent the temperature from rising too high, so that the temperature of the test medium can accurately and stably reach the preset value, further improving the accuracy and stability of the heating process, and avoiding energy waste caused by excessive heating and subsequent temperature adjustment.

[0032] In some embodiments, the adjusting valve 6 is a proportional valve arranged on the first branch 31 or the second branch 32. For example, when the refrigeration medium flowing out of the refrigeration module is 100, and the adjusting valve 6 arranged in the first branch 31 is opened at a proportion of 20%, the amount of the refrigeration medium entering the first branch 31 is 20, and the amount of the refrigeration medium entering the second branch 32 is 80.

[0033] The medium temperature control system provided in the application keeps the refrigeration medium in the refrigeration module 13 in a refrigeration state all the time, and the temperature of the refrigeration medium is relatively constant and does not change too much.

[0034] The existing way of raising the temperature of the heat exchange medium in the second loop 3, then exchanging heat between the heat exchange medium in the second loop 3 and the test medium through the heat exchanger 4, and finally raising the temperature of the test medium, can cause the amount of heated medium to be at least twice the amount of test medium. When cooling, the temperature of the heat exchange medium is relatively high, so the heat exchange medium needs to be cooled first, and then the test medium can be cooled. The amount of medium for cooling is increased, and the cooling amplitude of the heat exchange medium is relatively large.

[0035] However, in the present embodiment, the refrigerant medium always remains in a refrigeration state, and when the test medium is changed from a high-temperature state to a low-temperature state, the problem of large temperature change and excessive energy consumption of the refrigerant medium caused by the previous method of first cooling a large amount of heat exchange medium before cooling the test medium is avoided. The present application only needs to adjust the flow rate of the refrigerant medium to efficiently complete the cooling operation according to the current temperature of the test medium and the desired cooling amplitude, greatly reducing the additional consumption of energy, reducing the heating power and refrigeration power by half, and improving the energy utilization efficiency of the entire cooling process.

[0036] In some embodiments, the refrigerant medium is silicon oil, and the second loop 3 is kept at a low temperature below zero by the refrigeration module 13. Throughout the process, the silicon oil in the second loop 3 remains in a low-temperature state, and the temperature of the silicon oil does not change significantly during the entire warming process. When the test medium is warmed up, the temperature of the silicon oil does not change much, and the silicon oil does not need to be heated. At the same time, the process of reducing the temperature of the test medium from high to low also reduces the refrigeration energy of the silicon oil from high to low.

[0037] In order to accurately monitor the pressure change of the test medium and ensure the safety of the test process, the first pressure sensor 7 and the second pressure sensor 8 are specially arranged on the first loop 2. The first pressure sensor 7 and the second pressure sensor 8 are respectively located at the two ends of the secondary side of the heat exchanger 4. The first pressure sensor 7 is used to detect the pressure of the first loop 1 at the inlet of the heat exchanger 4, and the second pressure sensor 8 is used to detect the pressure of the first loop 1 at the outlet of the heat exchanger 4.

[0038] The first pressure sensor 7 and the second pressure sensor 8 monitor and intuitively reflect the specific pressure conditions of the test medium in the first loop 2 before and after passing through the heat exchanger 4 in real time. Through real-time monitoring and analysis of these pressure data, the operator can quickly and accurately judge the running state of the entire system. It can also ensure that when any pressure fluctuation exceeds the set safety range, an early warning signal is immediately sent to remind the operator to take appropriate and effective measures in a timely manner, thereby effectively preventing system failure or potential damage to the test parts caused by abnormal pressure.

[0039] For example, if the pressure difference between the two pressure sensors 7 and 8 increases significantly, it may indicate that there is a blockage or abnormal flow resistance problem inside the heat exchanger 4. In this case, the operator needs to respond quickly to check and maintain the system to avoid more serious consequences. In addition, continuous monitoring of pressure changes can also help identify early signs of problems, allowing for preventive maintenance, extending the life of the equipment, and ensuring the accuracy and reliability of test results.

[0040] In the first circuit 2, a temperature sensor 9 is also provided to continuously and real-time monitor the temperature changes of the test medium in the first circuit 2. The first circuit 2 is usually directly connected to the workpiece 1 to be tested, and the temperature change of the test medium directly affects the thermal environment of the workpiece 1 to be tested. Through the monitoring of the temperature sensor 9, the temperature state of the test medium can be accurately understood, so that the parameters can be adjusted in time to ensure that the test process of the workpiece 1 to be tested is carried out under suitable temperature conditions.

[0041] For example, when high-temperature testing of the workpiece 1 to be tested is required, the temperature sensor 9 can real-time feedback whether the temperature of the test medium in the first circuit 2 reaches the set high-temperature value. If the temperature does not meet the requirements, the system can increase the temperature of the test medium through the heating module 5 or adjust the adjusting valve 6 in the second circuit 3 to increase or decrease the heat exchange with the second circuit 3 to achieve rapid and stable target temperature. Conversely, in the low-temperature testing scenario, the temperature sensor 9 also plays a key role. If the temperature sensor 9 detects that the temperature of the test medium in the first circuit 2 is too low or too high, which is out of the required temperature range, the medium temperature control system can take appropriate measures for adjustment, such as reducing the power of the heating module 5, increasing the flow of the refrigerant, etc., to ensure that the temperature of the test medium is always in the appropriate range.

[0042] The real-time monitoring of the temperature sensor 9 also provides an important basis for fault diagnosis and safety protection of the system. If the temperature sensor 9 shows that the temperature of the test medium in the first circuit 2 abnormally fluctuates or exceeds the safety threshold, it may mean that the system has a fault, such as a heating module 5 failure, a heat exchanger 4 blockage, etc. At this time, the operator can take emergency measures in time according to the feedback information of the temperature sensor 9 to avoid adverse effects on the test of the workpiece 1 to be tested due to abnormal temperature, and even damage the test equipment and parts.

[0043] A first throttle valve 10 is provided in the first circuit 2, and a second throttle valve 11 is provided in the second circuit 3. The pressure in the first circuit 2 can be controlled by the first throttle valve 10. By adjusting the opening of the first throttle valve 10, the flow rate and pressure of the test medium in the first circuit 2 can be precisely controlled, thereby providing a stable thermal environment for the workpiece 1 under test. For example, in high-temperature testing, if the pressure in the first circuit 2 is too high, it may cause damage to the workpiece 1 under test. At this time, the opening of the first throttle valve 10 can be appropriately reduced to reduce the flow rate and pressure of the test medium. Conversely, in low-temperature testing, if the pressure is too low, it may affect the heat exchange efficiency. At this time, the opening of the first throttle valve 10 can be appropriately increased to increase the flow rate and pressure of the test medium, thereby improving the heat exchange effect.

[0044] The second throttle valve 11 can control the pressure in the second circuit 3, and is located between the second end of the regulating valve 6 and the heat exchanger 4. By adjusting the opening of the second throttle valve 11, the flow rate and pressure of the heat exchange medium in the second circuit 3 can be precisely controlled, thereby achieving precise adjustment of the temperature of the test medium in the first circuit 2. For example, when the test medium in the first circuit 2 needs to be cooled, the opening of the second throttle valve 11 can be appropriately increased to increase the flow rate and pressure of the heat exchange medium, thereby improving the heat exchange efficiency and achieving rapid cooling. Conversely, when the test medium needs to be heated, the opening of the second throttle valve 11 can be appropriately reduced to reduce the flow rate and pressure of the heat exchange medium, thereby reducing heat exchange to cooperate with the heating module 5 to heat the test medium.

[0045] The coordinated action of the first throttle valve 10 and the second throttle valve 11 can also achieve balanced control of the system pressure. By reasonably adjusting the openings of the two throttle valves, the pressure difference between the first circuit 2 and the second circuit 3 can be ensured to be within a safe range, thereby avoiding damage to key components such as the heat exchanger 4 due to unbalanced pressure. At the same time, the two throttle valves can also be dynamically adjusted according to the running state of the system and the test requirements, thereby achieving precise control of the temperature and pressure of the test medium and improving the efficiency and accuracy of the test of the workpiece 1 under test.

[0046] In the second circuit 3, a circulating pump 12 is also provided. The circulating pump 12 provides power to enable the heat exchange medium to flow at a suitable flow rate in the second circuit 3, thereby ensuring sufficient heat transfer with the test medium in the first circuit 2. The operation of the circulating pump 12 can also help maintain the temperature uniformity of the medium in the second circuit 3. In some cases, if the heat exchange medium does not flow smoothly or there is local stagnation in the second circuit 3, it may cause uneven temperature distribution and affect the heat exchange effect.

[0047] The application sets the heating module 5 in the first loop 2 of the test medium flow, and the amount of heating is only the test medium, and the heating power is reduced.

[0048] In another aspect, the embodiment also provides a workpiece temperature load test device, which comprises the medium temperature control system and a clamping assembly.

[0049] The above embodiment only exemplarily illustrates the principle and effect of the utility model, and is not used for limiting the utility model. Any person skilled in the art can modify or change the above embodiment without departing from the spirit and category of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.

Claims

1. A media temperature control system for workpiece testing, characterized by, The application relates to a medium temperature control system for workpiece testing. The application relates to a medium temperature control system for workpiece testing. The application relates to a medium temperature control system for workpiece testing. The application relates to a medium temperature control system for workpiece testing. The application relates to a medium temperature control system for workpiece testing.

2. The media temperature control system for workpiece testing of claim 1, wherein, The application relates to a medium temperature control system for workpiece testing.

3. The media temperature control system for workpiece testing of claim 2, wherein, The application relates to a medium temperature control system for workpiece testing.

4. The media temperature control system for workpiece testing of claim 3, wherein, The application relates to a medium temperature control system for workpiece testing.

5. The media temperature control system for workpiece testing of claim 1, wherein, The application relates to a medium temperature control system for workpiece testing.

6. The media temperature control system for workpiece testing of any of claims 1-5, wherein, The application relates to a medium temperature control system for workpiece testing.

7. The media temperature control system for testing of workpieces of any of claims 1-5, wherein, The application relates to a medium temperature control system for workpiece testing.

8. The media temperature control system for testing of workpieces of any of claims 1-5, wherein, The application relates to a medium temperature control system for workpiece testing.

9. The media temperature control system for workpiece testing of claim 8, wherein, The application relates to a medium temperature control system for workpiece testing.

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