An apparatus for protecting instruments and a method of use thereof at extreme temperatures

Abstract

The application relates to an instrument protection device and a use method thereof at an extreme temperature. A wind channel is arranged in the protection device, instruments are arranged in the wind channel, and the instruments are connected with measured objects through the protection device. The protection device is arranged in a simulation test box and penetrates the simulation test box at two ends, one end of which is connected with a heating and refrigerating assembly. A first temperature sensor is arranged in the wind channel. A second temperature sensor is arranged outside the protection device in the simulation test box. The detection values of the first temperature sensor and the second temperature sensor are acquired at any time in combination with a control device, the operation of the heating and refrigerating assembly is controlled according to the detection values, so that the temperature in the wind channel is always within the suitable working temperature of the instruments, the test instruments and equipment are not affected by the high and low temperatures in the environment box, the instruments can complete the test work of the prototype at the extreme temperature according to the actual vehicle assembly requirements, the accuracy of the test data is ensured, and the service life of the test equipment and instruments is prolonged.

Description

Technical Field

[0001] This application relates to the field of automotive extreme temperature testing, and in particular to an instrument protection device and its method of use under extreme temperatures. Background Technology

[0002] New energy vehicles are currently experiencing rapid development in China. As an important means of transportation, new energy vehicles have extremely high requirements for performance and lifespan. Many factors affect the quality of automotive products, necessitating rigorous verification processes before a vehicle can be launched on the market. The "three highs" test (high temperature, high altitude, and high humidity) is a crucial step in verifying the quality of new vehicles and eliminating overall vehicle malfunctions. It is an important basis for testing whether a new vehicle can adapt to extremely harsh environments and a vital step in ensuring that its design and development meet the requirements. In particular, the high-temperature and high-cold environment tests are conducted on new energy vehicles during the "three highs" test. During the development of new energy vehicles, high-temperature and high-cold tests are performed on the new energy powertrain and its various components to ensure the accuracy of the test data, simulating the original vehicle powertrain installation state and under extreme high-temperature and high-cold environment conditions.

[0003] However, since the simulated high and low temperature environments are conducted in an environmental chamber, excessively cold or hot environments can cause most of the precision instruments used in the tests to malfunction or even damage them. In some cases, the test results may deviate from the actual values ​​due to temperature fluctuations, which can affect the smooth progress of the testing work to a certain extent.

[0004] In some related technologies, there are two schemes for the normal use of instruments and meters under extreme temperatures for test prototypes:

[0005] I. The test sample is placed in an environmental chamber at a given extreme temperature; while all instruments are placed outside the simulated test chamber at room temperature for normal use.

[0006] II. Use instruments and meters that are resistant to high and low temperatures.

[0007] However, since instruments and meters have a certain temperature range for normal operation, generally -10℃ to 50℃, their measurements become inaccurate or they are directly damaged when used at extreme temperatures. This makes them unsuitable for certain specific tests. For example, test prototypes require simulation of operating conditions at extreme temperatures, necessitating that all liquid-cooling and oil-cooling pipelines and wiring harnesses be arranged according to the requirements of the actual vehicle. However, the limited length of these pipelines and wiring harnesses prevents them from connecting to the measuring instruments outside the temperature chamber (due to the need for flow meters to be inserted into the pipelines, current sensors to be added to the wiring harnesses, and high-voltage differential probes to be connected to the tested MCU sample). This makes it impossible to complete the test of the tested sample under extreme temperature conditions simulating the actual vehicle's operating conditions. Furthermore, even if a very small number of high-priced instruments support operation at extreme temperatures, their accuracy is insufficient, and the available models are limited and costly, failing to meet testing requirements. Summary of the Invention

[0008] This application provides an instrument protection device and its usage method under extreme temperatures, in order to solve the problem in related technologies that, due to the certain temperature range of normal use of instruments, the extreme test temperature affects the deviation from the actual value, thus affecting the test results to a certain extent.

[0009] Firstly, an instrument protection device is provided, comprising:

[0010] The first part is used to be installed in the simulation test chamber; the first part includes a protective component and a second temperature sensor; the protective component has an air duct; the air duct has a first temperature sensor and is used to install instruments; both ends of the protective component are used to pass through the simulation test chamber so that the air duct can be connected to the outside.

[0011] The second part, which is set outside the simulation test chamber, includes a heating and cooling assembly and a control device connected to each other; the heating and cooling assembly is connected to one end of the protective assembly; the control device is used to control the operation of the heating and cooling assembly according to the detection values ​​of the first temperature sensor and the second temperature sensor.

[0012] In some embodiments, a first check valve is provided in the air duct at both ends where the protective component connects to the simulation test box.

[0013] In some embodiments, the protective component is covered with a flame-retardant coating that is resistant to high and low temperatures.

[0014] In some embodiments, the protective component includes:

[0015] The insulated box has a sealed space inside; the insulated box has a groove for the detection lines of the instruments and the first temperature sensor to pass through.

[0016] An air inlet duct is connected to the sealed space via a second check valve;

[0017] The air outlet duct is connected to the sealed space via a second check valve.

[0018] In some embodiments, the protective component includes:

[0019] Both the air inlet and outlet pipes are made of flexible flame-retardant materials that are resistant to high and low temperatures.

[0020] In some embodiments, a third temperature sensor for detecting the temperature of instruments is provided within the sealed space, and the third temperature sensor is connected to the control device.

[0021] In some embodiments, the heating and cooling assembly includes:

[0022] An air supply duct, which contains a fan and is connected to the air duct of the protective component;

[0023] An air intake air conditioner is connected to the air supply duct and is used to deliver hot or cold air.

[0024] In some embodiments, the heating and cooling assembly includes:

[0025] An air supply duct that is connected to the air duct of the protective component;

[0026] A fan is installed inside the air supply duct;

[0027] A heating component is disposed within the air supply duct and located between the fan and the protective component.

[0028] In some embodiments, the heating assembly includes a connected PTC heating element, a temperature control switch, and a relay; the temperature control switch and relay are connected to the control device.

[0029] Secondly, a method for using an instrument protection device under extreme temperatures is provided, which includes the following steps:

[0030] The first part is installed inside the simulation test chamber, and the second part is installed outside the simulation test chamber;

[0031] The instruments are installed in the protective assembly of the first part, and the test piece is placed in the simulation test chamber;

[0032] The control device acquires the detection values ​​of the second temperature sensor and the first temperature sensor; the two detection values ​​are judged according to the set rules, and the operation of the heating and cooling components is controlled according to the results, so that the temperature of the protection component is always between the first set value and the second set value.

[0033] The beneficial effects of the technical solution provided in this application include:

[0034] This application provides an instrument protection device and its usage method under extreme temperatures. The protective component has an internal air duct, within which instruments can be installed. The instruments pass through the protective component and connect to the test piece. The protective component is housed in a simulation test chamber, with both ends of the chamber inserted, one end connected to a heating / cooling component. A first temperature sensor is installed within the air duct. A second temperature sensor is installed outside the protective component, inside the simulation test chamber. Through this setup, combined with a control device, the detection values ​​of the first and second temperature sensors can be continuously acquired. The operation of the heating / cooling component is then controlled based on these values ​​to blow hot or cold air into the air duct, ensuring that the temperature within the air duct remains within the suitable operating temperature range for the instruments. This prevents the test instruments and equipment from being affected by the high and low temperatures in the environmental chamber. It allows for testing of the prototype under extreme temperatures according to actual vehicle assembly requirements, and also enables the use of any required instruments to complete the testing of the prototype, ensuring the accuracy of the test data and extending the service life of the test equipment and instruments. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the instrument protection device provided in the embodiments of this application.

[0037] In the diagram: 1. Protective components; 100. Insulated box; 101. Air inlet duct; 102. Air outlet duct; 2. Heating and cooling components; 200. Air supply duct; 201. Air intake air conditioner; 202. Temperature control switch; 203. Relay; 204. Fan; 205. PTC heating element; 3. First temperature sensor; 4. Second temperature sensor; 5. Control device; 6. First check valve; 7. Third temperature sensor; 8. Second check valve; 9. Instruments and meters; 10. Testing system; 11. Test piece; 12. Simulation test box. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] This application provides an instrument protection device and its usage method under extreme temperatures, in order to solve the problem in related technologies that, due to the certain temperature range of normal use of instruments, the extreme test temperature affects the deviation from the actual value, thus affecting the test results to a certain extent.

[0040] Please see Figure 1 An instrument protection device, comprising:

[0041] The first part is used to be installed in the simulation test chamber 12; the first part includes a protective component 1 and a second temperature sensor 4; the protective component 1 is provided with an air duct; the air duct is provided with a first temperature sensor 3 and is used to install instruments 9; both ends of the protective component 1 are used to pass through the simulation test chamber 12 so that the air duct is connected to the outside.

[0042] The second part is used to be set outside the simulation test chamber 12. The second part includes a heating and cooling component 2 and a control device 5 connected to each other. The heating and cooling component 2 is connected to one end of the protective component 1. The control device 5 is used to control the operation of the heating and cooling component 2 according to the detection values ​​of the first temperature sensor 3 and the second temperature sensor 4.

[0043] Because the protective component 1 has an air duct, an instrument 9 can be installed inside the air duct. The instrument 9 passes through the protective component 1 and is connected to the test piece 11. The protective component 1 is installed in the simulation test chamber 12, with both ends of the simulation test chamber 12 passing through it, one end of which is connected to the heating and cooling component 2. A first temperature sensor 3 is installed inside the air duct. A second temperature sensor 4 is installed outside the protective component 1 inside the simulation test chamber 12. Through the above settings, combined with the control device 5, the detection values ​​of the first temperature sensor 3 and the second temperature sensor 4 can be obtained at all times. Then, the operation of the heating and cooling component 2 can be controlled according to the detection values ​​to blow hot or cold air into the air duct, so that the temperature inside the air duct is always within the suitable operating temperature of the instrument 9. This ensures that the test instruments and equipment are not affected by the high and low temperatures in the environmental chamber. It can meet the assembly requirements of the actual vehicle and can use any instrument required to complete the test of the prototype at extreme temperatures, ensuring the accuracy of the test data and improving the service life of the test equipment and instruments.

[0044] In some preferred embodiments, to ensure the heat preservation effect after cooling and heating, reduce the operation of the heating and cooling components 2, and prevent air backflow, the following settings are made:

[0045] Inside the air duct, and at both ends where the protective component 1 connects to the simulation test box 12, a first check valve 6 is provided.

[0046] When cooling or heating is required, the first check valve 6 opens, allowing air to be continuously discharged without backflow, ensuring rapid discharge. When heat preservation is required, the first check valve 6 closes, keeping hot or cold air within the protective component 1, thus eliminating the need for the heating / cooling component 2 to perform unnecessary work at the appropriate temperature.

[0047] Furthermore, to ensure effective insulation, protective component 1 is made of flexible material and covered with a flame-retardant coating that is resistant to both high and low temperatures. This flame-retardant coating is resistant to temperatures ranging from +200℃ to -40℃. The specific material for this flame-retardant coating is ceramic fiber cotton. In the above context, "high and low temperatures" can be understood as +200℃ to -40℃.

[0048] Furthermore, a detailed explanation is provided regarding the specific structure of the protective component 1, specifically how it connects to the simulation test chamber 12:

[0049] The protective assembly 1 includes: an insulated chamber 100, an air inlet pipe 101, and an air outlet pipe 102. The insulated chamber 100 has a sealed space inside; the insulated chamber 100 has a groove for the detection lines of the instrument 9 and the first temperature sensor 3 to pass through; the instrument 9 is connected to the test object through the groove, ensuring a seal at the groove during connection; the air inlet pipe 101 is connected to the sealed space via a second check valve 8; the air outlet pipe 102 is also connected to the sealed space via a second check valve 8. The other ends of the air inlet pipe 101 and the air outlet pipe 102 are connected to the connection port on the simulation test chamber 12 via the aforementioned first check valve 6.

[0050] In actual use, the position of the tested component 11 in the simulation test chamber 12 varies because the tested component 11 is a part on a vehicle, and different parts are located in different positions. Sometimes, due to the limitations of the testing pipeline, it is necessary to move the component. Therefore, further restrictions were placed on the materials of the air inlet pipe 101 and the air outlet pipe 102.

[0051] Both the air inlet duct 101 and the air outlet duct 102 are made of flexible flame-retardant material that is resistant to high and low temperatures. Because they are flexible materials, they are not restricted in their movement. In addition, the high and low temperature resistance is designed so that when the air entering the duct is at low temperature, it may condense into ice in the air inlet duct 101 and the air outlet duct 102 and accumulate in the duct wall. When heating, the ice melts and water droplets may flow into the insulation box 100, causing an impact.

[0052] In some preferred embodiments, the first temperature sensor 3 detects the temperature value within the protective assembly 1, enabling the instrument 9 to meet normal operating requirements. However, in actual operation, what we ultimately need is the detection data, which needs to be stored by the instrument 9 before being transmitted. The normal operating temperature of the storage component differs from that of the detection component. Furthermore, the temperature of the instrument 9 itself and the temperature within the protective assembly 1 also differ during the cooling or heating process.

[0053] Therefore, in order to further ensure the accuracy of the obtained detection data, a third temperature sensor 7 for detecting the temperature of instrument 9 is provided in the sealed space, and the third temperature sensor 7 is connected to the control device 5.

[0054] The control device 5 is used to control the operation of the heating and cooling assembly 2 based on the detection values ​​of the first temperature sensor 3, the third temperature sensor 7, and the second temperature sensor 4.

[0055] In some preferred embodiments, the specific structure of the heating and cooling assembly 2 is described below:

[0056] The first type of heating and cooling assembly 2 includes: an air supply duct 200, which houses a fan and is connected to the air duct of the protective assembly 1; and an air intake air conditioner 201, which is connected to the air supply duct 200 and is used to supply hot or cold air. The air supply is achieved by utilizing the cooling or heating function of the air intake air conditioner 201.

[0057] The second type includes a heating and cooling assembly 2 comprising: an air supply duct 200 connected to the air duct of the protective assembly 1; a fan 204 disposed within the air supply duct 200; and a heating assembly disposed within the air supply duct 200, located between the fan 204 and the protective assembly 1. The cooling and heating effects are regulated by continuously supplying ambient temperature air. During heating, the process is accelerated by the heating assembly, which includes a connected PTC heating element 205, a temperature control switch 202, and a relay 203. The temperature control switch 202 and the relay 203 are connected to the control device 5.

[0058] The third type adds a heating component to the first type.

[0059] This application also proposes a method for using an instrument protection device under extreme temperatures, which includes the following steps:

[0060] The first part is installed inside the simulation test box 12, and the second part is installed outside the simulation test box 12.

[0061] The instrument 9 is installed in the protective assembly 1 of the first part, and the test piece 11 is placed in the simulation test chamber 12;

[0062] The control device 5 acquires the detection values ​​of the second temperature sensor 4 and the first temperature sensor 3; the two detection values ​​are judged according to the set rules, and the operation of the heating and cooling component 2 is controlled according to the results so that the temperature of the protection component 1 is always between the first set value and the second set value.

[0063] The process of judging the two detection values ​​according to a set rule and controlling the operation of the heating and cooling component 2 based on the result includes the following steps:

[0064] When the absolute value of the difference between the detection value of the first temperature sensor 3 and the detection value of the second temperature sensor 4 is less than the first standard value, and the detection value of the first temperature sensor 3 is between the first set value and the second set value, the heating and cooling component 2 is controlled not to operate; the second set value is greater than the first set value; the area between the first set value and the second set value is the normal operating temperature range of the instrument 9.

[0065] When the absolute value of the difference between the detection value of the first temperature sensor 3 and the detection value of the second temperature sensor 4 is less than the first standard value, and the detection value of the first temperature sensor 3 is less than the first set value, the heating and cooling assembly 2 is controlled to send room temperature air or hot air to the protection assembly 1 until the detection value of the first temperature sensor 3 returns to between the first set value and the second set value.

[0066] When the absolute value of the difference between the detection value of the first temperature sensor 3 and the detection value of the second temperature sensor 4 is less than the first standard value, and the detection value of the first temperature sensor 3 is greater than the second set value, the heating and cooling assembly 2 is controlled to send room temperature air or cold air to the protection assembly 1 until the detection value of the first temperature sensor 3 returns to between the first set value and the second set value.

[0067] When the absolute value of the difference between the detection value of the first temperature sensor 3 and the detection value of the second temperature sensor 4 is greater than the first standard value, and the detection value of the first temperature sensor 3 is less than the first set value, the heating and cooling component 2 is controlled to start heating and hot air is sent to the protection component 1 until the detection value of the first temperature sensor 3 returns to between the first set value and the second set value.

[0068] When the absolute value of the difference between the detection value of the first temperature sensor 3 and the detection value of the second temperature sensor 4 is greater than the first standard value, and the detection value of the first temperature sensor 3 is greater than the second set value, the heating and cooling component 2 is controlled to start cooling and cold air is sent to the protection component 1 until the detection value of the first temperature sensor 3 returns to between the first set value and the second set value.

[0069] After incorporating the detection value from the third temperature sensor 7 into the above control process, the following steps are required:

[0070] Before performing the step of judging the two detection values ​​according to the set rules and controlling the operation of the heating and cooling component 2 based on the result, it is necessary to determine whether the detection value of the third temperature sensor 7 and the detection value of the first temperature sensor 3 are the same:

[0071] If the detection value of the third temperature sensor 7 is less than or equal to the detection value of the first temperature sensor 3, then the original steps described above are executed.

[0072] If the detection value of the third temperature sensor 7 is greater than the detection value of the first temperature sensor 3, then the detection value of the third temperature sensor 7 is replaced with the detection value of the first temperature sensor 3, and the above steps are followed.

[0073] When conducting high and low temperature simulation tests, this application is equivalent to installing a thermal insulation protection device for the instrument 9 in an environmental chamber. This device maintains the temperature within the thermal insulation protection device within the temperature and humidity range necessary for the instrument to operate normally. By placing the instrument within this thermal insulation protection device, the normal operation of the testing instruments and sensors is ensured. The device in this application has a simple structure, high practicality, and can effectively protect the testing instruments and equipment, offering significant economic benefits.

[0074] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0075] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0076] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for using an instrument protection device under extreme temperatures, characterized in that: The instrument protection device includes: a first part, which is installed in the simulation test chamber (12); the first part includes a protective component (1) and a second temperature sensor (4); the protective component (1) is provided with an air duct; the air duct is provided with a first temperature sensor (3) and is used to install instruments (9); both ends of the protective component (1) are used to pass through the simulation test chamber (12) so that the air duct is connected to the outside; a second part, which is installed outside the simulation test chamber (12), the second part includes a heating and cooling component (2) and a control device (5) connected to each other; the heating and cooling component (2) is connected to one end of the protective component (1); the control device (5) is used to control according to the detection values ​​of the first temperature sensor (3) and the second temperature sensor (4). The operation of the heating and cooling assembly (2); the air duct, and the two ends connected to the protective assembly (1) and the simulation test box (12) are provided with first check valves (6); the protective assembly (1) includes: a heat preservation box (100), which has a sealed space; the heat preservation box (100) is provided with a wire groove for the detection lines of the instrument (9) and the first temperature sensor (3) to pass through; an air inlet pipe (101), which is connected to the sealed space through a second check valve (8); an air outlet pipe (102), which is connected to the sealed space through a second check valve (8); the sealed space is provided with a third temperature sensor (7) for detecting the temperature of the instrument (9), and the third temperature sensor (7) is connected to the control device (5); The method for using the instrument protection device under extreme temperatures includes the following steps: The first part is installed inside the simulation test box (12), and the second part is installed outside the simulation test box (12); The instrument (9) is installed in the protective assembly (1) of the first part, and the test piece (11) is placed in the simulation test chamber (12); The control device (5) is used to obtain the detection values ​​of the second temperature sensor (4) and the first temperature sensor (3); the two detection values ​​are judged according to the set rules, and the operation of the heating and cooling component (2) is controlled according to the results so that the temperature of the protection component (1) is always between the first set value and the second set value. The specific rules for setting these rules are as follows: When the absolute value of the difference between the detection value of the first temperature sensor (3) and the detection value of the second temperature sensor (4) is less than the first standard value, and the detection value of the first temperature sensor (3) is between the first set value and the second set value, the heating and cooling component (2) is controlled not to operate. When the absolute value of the difference between the detection value of the first temperature sensor (3) and the detection value of the second temperature sensor (4) is less than the first standard value, and the detection value of the first temperature sensor (3) is less than the first set value, the heating and cooling component (2) is controlled to send room temperature air or hot air to the protection component (1) until the detection value of the first temperature sensor (3) returns to between the first set value and the second set value. When the absolute value of the difference between the detection value of the first temperature sensor (3) and the detection value of the second temperature sensor (4) is less than the first standard value, and the detection value of the first temperature sensor (3) is greater than the second set value, the heating and cooling component (2) is controlled to send room temperature air or cold air to the protection component (1) until the detection value of the first temperature sensor (3) returns to between the first set value and the second set value. When the absolute value of the difference between the detection value of the first temperature sensor (3) and the detection value of the second temperature sensor (4) is greater than the first standard value, and the detection value of the first temperature sensor (3) is less than the first set value, the heating and cooling component (2) is controlled to start heating and hot air is sent to the protection component (1) until the detection value of the first temperature sensor (3) returns to between the first set value and the second set value. When the absolute value of the difference between the detection value of the first temperature sensor (3) and the detection value of the second temperature sensor (4) is greater than the first standard value, and the detection value of the first temperature sensor (3) is greater than the second set value, the heating and cooling assembly (2) is controlled to start cooling and cold air is sent to the protection assembly (1) until the detection value of the first temperature sensor (3) returns to between the first set value and the second set value.

2. The method of using the instrument protection device as described in claim 1 under extreme temperatures, characterized in that: The protective component (1) is covered with a flame-retardant coating layer that is resistant to high and low temperatures.

3. The method of using the instrument protection device as described in claim 1 at extreme temperatures, characterized in that, The protective component (1) includes: Both the air inlet pipe (101) and the air outlet pipe (102) are made of flexible flame-retardant material that is resistant to high and low temperatures.

4. The method of using the instrument protection device as described in claim 1 under extreme temperatures, characterized in that, The heating and cooling assembly (2) includes: An air supply duct (200) is provided with a fan and is connected to the air duct of the protective component (1); An air intake air conditioner (201) is connected to the air supply duct (200) and is used to deliver hot or cold air.

5. The method of using the instrument protection device as described in claim 1 at extreme temperatures, characterized in that, The heating and cooling assembly (2) includes: An air supply duct (200) is connected to the air duct of the protective component (1); A fan (204) is installed inside the air supply duct (200); A heating component is disposed within the air supply duct (200) and located between the fan (204) and the protective component (1).

6. The method of using the instrument protection device as described in claim 5 under extreme temperatures, characterized in that: The heating assembly includes a connected PTC heating element (205), a temperature control switch (202), and a relay (203); the temperature control switch (202) and the relay (203) are connected to the control device (5).

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