Alcohol detector high and low temperature test device

Abstract

The embodiment of the invention provides an alcohol detector high and low temperature test device which comprises a verification box, a zero gas conveying assembly and a standard gas conveying assembly, the zero gas conveying assembly is communicated with a verification space of the verification box, and the standard gas conveying assembly is communicated with an alcohol detector in the verification box; before the blowing test, the zero gas conveying assembly conveys zero gas with a set temperature to the verification space, so that the temperature of the verification space reaches a target temperature; in the blowing test process, the zero gas conveying assembly conveys zero gas at the set temperature to the verification space, so that the temperature of the verification space is kept at the target temperature, and meanwhile, the standard gas conveying assembly conveys standard gas into the verification box to carry out the blowing test on the alcohol detector A; and after the blowing test is completed, the standard gas conveying assembly stops conveying the standard gas, and the zero gas conveying assembly conveys zero gas at a set temperature to the verification space, so that waste gas in the verification space is discharged from the exhaust port of the verification box. According to the invention, the waste gas exhausting and heating or refrigerating functions can be realized only through the zero gas conveying assembly.

Description

Technical Field

[0001] The present application relates to the field of alcohol detector calibration, and in particular to a high and low temperature testing device for an alcohol detector. Background Art

[0002] Alcohol testers are measuring instruments that require mandatory inspection. Before use, they must obtain a type approval certificate. For this purpose, type tests must be carried out. The test items include operating temperature tests (also called high and low temperature tests), which is to test whether the readings are accurate in high and low temperature environments.

[0003] For example, 9.3.19.4 of "JJF 1785-2019 Outline for Form Evaluation of Exhaled Gas Alcohol Content Detector" stipulates that the high temperature working test procedure of the alcohol detector is as follows:

[0004] Place the alcohol detector in a test chamber, raise the temperature of the test chamber to (40±2)°C at a rate of no more than 2°C / min, turn on the power of the alcohol detector, keep it on for 2 hours, take it out and test the alcohol detector 5 times with ethanol standard gas with a concentration of about 0.40 mg / L (after each test, the alcohol detector should be immediately put back into the test chamber and the next test should be carried out 5 minutes later), record the indication of the alcohol detector, and calculate the indication error.

[0005] The low temperature working test procedure of the alcohol detector is stipulated in 9.3.20.4 of "JJF 1785-2019 Outline for Form Evaluation of Exhaled Gas Alcohol Content Detector" as follows:

[0006] Place the alcohol detector in a test chamber, lower the temperature of the test chamber to (0±2)°C at a rate of no more than 2°C / min, turn on the power of the alcohol detector, keep it on for 2 hours, and test the alcohol detector 5 times using 0.40 mg / L ethanol standard gas (after each test, the alcohol detector should be immediately put back into the test chamber and the next test should be performed 5 minutes later), record the indication of the alcohol detector, and calculate the indication error.

[0007] In the prior art, when conducting a low-temperature test, the alcohol detector needs to be taken out of the test box. If the ambient temperature and humidity are high, condensation is likely to occur inside the alcohol detector with a lower temperature after it is taken out of the constant temperature box, affecting the normal operation and performance of the alcohol sensor and the circuit, thereby affecting the detection of the alcohol detector. Summary of the invention

[0008] The embodiment of the present application provides a high and low temperature test device for an alcohol detector to solve the above-mentioned technical problems.

[0009] Specifically, the embodiment of the present application provides a high and low temperature test device for an alcohol detector, which includes:

[0010] A calibration box, the calibration box comprising a calibration space for accommodating the alcohol detector to be tested and an exhaust port connected to the calibration space and the alcohol detector;

[0011] A zero gas delivery component, the output end of which is in communication with the calibration space and is used for delivering zero gas to the calibration space;

[0012] A standard gas delivery component, the output end of which is connected to the alcohol detector in the calibration box, and is used to deliver standard gas to the alcohol detector in the calibration box;

[0013] Before the high and low temperature test device performs a blowing test on the alcohol detector, the zero air delivery component delivers zero air of a set temperature to the calibration space so that the temperature of the calibration space reaches the target temperature;

[0014] During the process of the high and low temperature test device performing a blow test on the alcohol detector, the zero gas delivery component delivers zero gas of a set temperature to the calibration space to keep the temperature of the calibration space at the target temperature, and at the same time, the standard gas delivery component delivers standard gas to the alcohol detector in the calibration box for the blow test;

[0015] After the high and low temperature testing device completes the air blowing test on the alcohol detector, the standard gas delivery component stops delivering standard gas to the alcohol detector in the calibration box, and the zero gas delivery component delivers zero gas to the calibration space, so that the exhaust gas in the calibration space is discharged from the exhaust port.

[0016] In an optional implementation manner of the present application, an alcohol sensor is provided in the verification box for detecting the alcohol concentration in the verification space;

[0017] The high and low temperature test device also includes a control unit, which is electrically connected to the zero gas delivery component, the standard gas delivery component and the alcohol sensor;

[0018] Before the high and low temperature test device performs a blow test on the alcohol detector, the control unit controls the alcohol sensor to detect the current alcohol concentration value of the calibration space;

[0019] If the current alcohol concentration value is not higher than the preset alcohol concentration value, the control unit controls the zero gas delivery component to deliver zero gas of a set temperature to the calibration space, and controls the standard gas delivery component to deliver standard gas to the alcohol detector;

[0020] If the current alcohol concentration value is higher than the preset alcohol concentration value, the control unit controls the zero air delivery component to deliver zero air of a set temperature to the calibration space, so that the exhaust gas in the calibration space is discharged from the exhaust port and the temperature of the calibration space reaches the target temperature.

[0021] In an optional implementation manner of the present application, the zero air delivery assembly includes:

[0022] A zero gas delivery pipeline, whose input end is used to input zero gas, and whose output end is connected with the calibration space, and is used to deliver zero gas of set temperature to the calibration space;

[0023] A zero gas temperature control unit is arranged on the zero gas delivery pipeline, and the zero gas temperature control unit is used to control the temperature of the zero gas output by the zero gas delivery pipeline to reach a set temperature.

[0024] In an optional implementation manner of the present application, the zero air temperature control unit includes:

[0025] A zero gas refrigerator is arranged on the zero gas delivery pipeline and is used to cool the zero gas flowing through the zero gas refrigerator;

[0026] A zero gas heater is arranged on the zero gas delivery pipeline and downstream of the zero gas refrigerator, and the zero gas heater is used to heat the zero gas flowing through the zero gas heater;

[0027] During the low temperature test of the alcohol detector by the high and low temperature testing device, the zero gas refrigerator cools the zero gas flowing through the zero gas refrigerator to a first temperature, which is lower than a set temperature; the zero gas heater heats the zero gas output from the zero gas refrigerator so that the temperature of the zero gas output from the zero gas delivery pipeline reaches the set temperature.

[0028] In an optional implementation manner of the present application, the zero gas delivery assembly further includes: a first zero gas temperature sensor, disposed at an output end of the zero gas delivery pipeline, for detecting the temperature of the zero gas outputted from the output end of the zero gas delivery pipeline;

[0029] The zero gas temperature control unit is used to control the temperature of the zero gas flowing through the zero gas temperature control unit according to the temperature value detected by the first zero gas temperature sensor, so that the zero gas output from the output end of the zero gas delivery pipeline reaches a set temperature.

[0030] In an optional implementation manner of the present application, a calibration temperature sensor is provided in the calibration box, and the calibration temperature sensor is used to detect the temperature of the calibration space;

[0031] The zero air temperature control unit is used to control the temperature of the zero air flowing through the zero air temperature control unit according to the temperature value detected by the calibration temperature sensor, so that the temperature of the calibration space reaches the target temperature.

[0032] In an optional implementation manner of the present application, the zero air delivery assembly further includes:

[0033] A first zero gas temperature sensor is disposed at the output end of the zero gas delivery pipeline and is used to detect the temperature of the zero gas outputted from the output end of the zero gas delivery pipeline; and

[0034] A calibration temperature sensor, arranged in the calibration box, for detecting the temperature of the calibration space;

[0035] The zero gas temperature control unit is used to adjust the temperature of the zero gas flowing through the zero gas temperature control unit according to the temperature value detected by the verification temperature sensor and the temperature value detected by the first zero gas temperature sensor.

[0036] In an optional implementation manner of the present application, the high and low temperature test device further comprises a control unit, and the control unit is electrically connected to the zero gas temperature control unit, the first zero gas temperature sensor, the verification temperature sensor, and the standard gas delivery assembly;

[0037] When the temperature value detected by the first zero-gas temperature sensor reaches the set temperature and the temperature value detected by the verification temperature sensor reaches the target temperature, the control unit controls the zero-gas temperature control unit to maintain the current heating amount so that the temperature value detected by the verification temperature sensor is maintained at the target temperature;

[0038] When the temperature value detected by the first zero-gas temperature sensor reaches a set temperature and the temperature value detected by the verification temperature sensor is lower than a target temperature, the control unit controls the zero-gas temperature control unit to increase the heating amount so that the temperature value detected by the verification temperature sensor reaches the target temperature;

[0039] When the temperature value detected by the first zero air temperature sensor reaches the set temperature and the temperature value detected by the verification temperature sensor is higher than the target temperature, the control unit controls the zero air temperature control unit to reduce the heating amount or stop heating so that the temperature value detected by the verification temperature sensor reaches the target temperature.

[0040] In an optional implementation manner of the present application, the high and low temperature test device further includes:

[0041] A calibration pressure sensor, arranged in the calibration box, for detecting the pressure of the calibration space;

[0042] The zero gas flow controller is arranged on the zero gas delivery component and is used to adjust the flow of zero gas delivered by the zero gas delivery component to the calibration space according to the pressure value detected by the calibration pressure sensor, so that the pressure of the calibration space is maintained within a preset pressure range.

[0043] In an optional embodiment of the present application, the standard gas delivery assembly includes:

[0044] A temperature control box, a standard gas tank, a standard gas control valve, a standard gas flow controller, and a standard gas heater. The standard gas tank, the standard gas control valve, and the standard gas flow controller are all arranged in the temperature control box;

[0045] The standard gas tank is connected to the input end of the standard gas flow controller through the standard gas control valve, and the output end of the standard gas flow controller is connected to the alcohol detector in the calibration box;

[0046] The standard gas tank is used to contain standard gas;

[0047] The standard gas control valve is used to control the opening and closing of the standard gas and to reduce the pressure of the standard gas;

[0048] The standard gas flow controller is used to adjust the flow rate of the standard gas;

[0049] The standard gas heater is used to heat the temperature control box to a required temperature.

[0050] In an optional embodiment of the present application, the standard gas delivery assembly further includes: a first standard gas temperature sensor, disposed in the temperature control box, for detecting the temperature in the temperature control box; the standard gas heater is used to heat the temperature control box to a desired temperature according to the temperature value detected by the first standard gas temperature sensor; or

[0051] The standard gas delivery component further includes: a second standard gas temperature sensor, which is arranged at the output end of the standard gas delivery component and is used to detect the temperature of the standard gas delivered by the output end of the standard gas delivery component; the standard gas heater is used to heat the standard gas delivered by the output end of the standard gas delivery component to a desired temperature according to the temperature value detected by the second standard gas temperature sensor; or

[0052] The standard gas delivery component also includes: a first standard gas temperature sensor and a second standard gas temperature sensor, the first standard gas temperature sensor is arranged in the temperature control box, the first standard gas temperature sensor is used to detect the temperature in the temperature control box, the second standard gas temperature sensor is arranged at the output end of the standard gas delivery component, the second standard gas temperature sensor is used to detect the temperature of the standard gas delivered by the output end of the standard gas delivery component; the standard gas heater is used to heat the standard gas delivered by the output end of the standard gas delivery component to the required temperature according to the temperature value detected by the first standard gas temperature sensor and the temperature value detected by the second standard gas temperature sensor.

[0053] Beneficial effects:

[0054] The zero gas delivery assembly is used to deliver zero gas of set temperature into the calibration box to control the temperature inside the calibration box, and the standard gas delivery assembly is used to deliver standard gas to the alcohol detector in the calibration box for testing; thus, during the low-temperature test, the alcohol detector is set in the calibration box and does not need to be taken out, and the temperature and humidity of the environment in which the alcohol detector is located can be kept constant to avoid condensation inside the alcohol detector and affect the normal operation of the alcohol detector.

[0055] The zero gas delivery component delivers zero gas into the calibration box, which can not only control the temperature in the calibration box, but also discharge the waste gas in the calibration box. Compared with the prior art, which has a separate device for heating or cooling the calibration box and a separate exhaust device for discharging the waste gas, the embodiment of the present application can achieve the exhaust gas and heating or cooling functions only through the zero gas delivery component.

[0056] In addition, compared with the conventional solution of directly heating or cooling the outside or inside of the calibration box, the embodiment of the present application introduces zero air into the calibration box to achieve temperature control. The flowing zero air also stirs the environment inside the calibration box, thereby making the temperature inside the calibration box more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0058] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0059] Figure 1 This is a circuit diagram of the high and low temperature test device provided in an embodiment of the present application.

[0060] Figure 2 This is a circuit diagram of the high and low temperature test device provided in an embodiment of the present application.

[0061] Figure 3 This is a structural diagram of the high and low temperature test device provided in an embodiment of the present application.

[0062] Figure 4 This is a structural diagram of the high and low temperature test device provided in an embodiment of the present application.

[0063] Figure 5 This is a structural diagram of the high and low temperature test device provided in an embodiment of the present application.

[0064] Figure 6 This is a structural diagram of the high and low temperature test device provided in an embodiment of the present application.

[0065] In the figure:

[0066] 100. Detection device;

[0067] 10. Calibration box; 11. First connecting part; 12. Second connecting part; 13. Calibration space; 14. Exhaust port; 15. Blowing nozzle; 16. Calibration temperature sensor; 17. Calibration pressure sensor; 18. Alcohol sensor;

[0068] 20. Zero gas delivery assembly; 20a. Zero gas temperature control unit; 21. Zero gas delivery pipeline; 213. Input end; 212. Output end; 23. Zero gas control valve; 24. Zero gas flow controller; 25. Zero gas refrigerator; 25a. Compressor; 25b. Condenser; 25c. Expansion valve; 25d. Evaporator; 251. Second zero gas temperature sensor; 26. Zero gas heater; 27. Two-position three-way valve; 29. ​​First zero gas temperature sensor;

[0069] 30. Standard gas delivery assembly; 31. Temperature control box; 32. Standard gas tank; 33. Standard gas control valve; 34. Standard gas flow controller; 36. Standard gas heater; 37. First standard gas temperature sensor; 39. Second standard gas temperature sensor; 302. Output terminal;

[0070] 40. Exhaust pipeline; 41. Exhaust fan; 42. One-way valve;

[0071] 80. Alarm unit;

[0072] 90. Control unit. DETAILED DESCRIPTION

[0073] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. All other embodiments obtained by those skilled in the art without creative work based on the embodiments in the present application belong to the scope of protection of the present application.

[0074] Reference to "embodiment" or "implementation" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment or implementation may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0075] like Figure 1 and Figure 3 As shown, the present invention provides a high and low temperature test device 100 for an alcohol detector A, which includes a calibration box 10, a zero gas delivery component 20 and a standard gas delivery component 30. The calibration box 10 includes a calibration space 13 for accommodating the alcohol detector A to be tested and an exhaust port 14 connected to the calibration space 13 and the alcohol detector A; the output end 212 of the zero gas delivery component 20 is connected to the calibration space 13 for delivering zero gas to the calibration space 13; the output end 302 of the standard gas delivery component 30 is connected to the alcohol detector A in the calibration box 10 for delivering standard gas to the alcohol detector A in the calibration box 10.

[0076] Before the high and low temperature testing device 100 performs an air blowing test on the alcohol detector A, the zero gas delivery component 20 delivers zero gas of a set temperature to the calibration space 13, so that the temperature of the calibration space 13 reaches the target temperature; during the process of the high and low temperature testing device 100 performing an air blowing test on the alcohol detector A, the zero gas delivery component 20 delivers zero gas of a set temperature to the calibration space 13, so that the temperature of the calibration space 13 is maintained at the target temperature, and at the same time the standard gas delivery component 30 delivers standard gas to the alcohol detector A to perform an air blowing test on the alcohol detector A; after the high and low temperature testing device 100 completes the air blowing test on the alcohol detector A, the standard gas delivery component 30 stops delivering standard gas to the alcohol detector A in the calibration box 10, and the zero gas delivery component 20 delivers zero gas of a set temperature to the calibration space 13, so that the exhaust gas in the calibration space 13 is discharged from the exhaust port 14.

[0077] The zero gas delivery assembly 20 of the embodiment of the present application can deliver zero gas of a set temperature into the calibration box 10 to control the temperature inside the calibration box 10, and the standard gas delivery assembly 30 can deliver standard gas to the alcohol detector A in the calibration box 10 for testing; thus, during the low-temperature test, the alcohol detector A is set in the calibration box 10 and does not need to be taken out, and the temperature and humidity of the environment in which the alcohol detector A is located can be kept constant to avoid the formation of condensation water inside the alcohol detector A and affect the normal operation of the alcohol detector A.

[0078] When the zero gas delivery component 20 delivers zero gas to the calibration box 10, it can heat or cool the calibration box 10. When the temperature in the calibration box 10 is kept in a stable environment, the zero gas delivered by the zero gas delivery component 20 to the calibration box 10 can also discharge the waste gas in the calibration box 10. That is, the zero gas delivery component 20 delivers zero gas to the calibration box 10, which can not only control the temperature in the calibration box 10, but also discharge the waste gas in the calibration box 10. Compared with the prior art, in which a device is separately set to heat or cool the calibration box and an exhaust gas exhaust device is separately set to discharge the waste gas, the embodiment of the present application can realize the exhaust gas exhaust and heating or cooling functions only through the zero gas delivery component 20. In addition, compared with the conventional solution of directly heating or cooling the outside or inside of the calibration box, the embodiment of the present application introduces zero gas into the calibration box 10 to achieve temperature control, and the flowing zero gas also stirs the environment in the calibration box 10, thereby making the temperature in the calibration box 10 more uniform.

[0079] Among them, the exhaust gas should be understood as the standard gas remaining in the calibration space 13 after the high and low temperature testing device 100 performs a blowing test on the alcohol detector A, that is, the alcohol gas remaining in the calibration space 13. The exhaust gas can also be called alcohol exhaust gas.

[0080] Among them, the high and low temperature test device 100 for the alcohol detector A may include a high temperature test on the alcohol detector A, and may also include a low temperature test on the alcohol detector A. The high and low temperature test device 100 includes at least n blowing tests during the high temperature test and the low temperature test on the alcohol detector A. The high and low temperature test device 100 of the embodiment of the present application performs high and low temperature tests on the alcohol detector A, which may be carried out according to the high temperature working test procedure and low temperature working test procedure of the alcohol detector specified in 9.3.19.4 of the "JJF 1785-2019 Outline for the Form Evaluation of Exhaled Gas Alcohol Content Detector", and 5 blowing tests are included in the high temperature working test procedure or the low temperature working test procedure. That is, n=5. It should be understood that n is not limited to 5.

[0081] The n times of blowing tests performed by the high and low temperature test device 100 of the embodiment of the present application on the alcohol detector A include the first blowing test, multiple intermediate blowing tests and the last blowing test. Among them, the first blowing test and any intermediate blowing test can be called non-last blowing test.

[0082] Herein, unless otherwise specified, "before the air blow test" may be before any air blow test, "during the air blow test as defined herein" may be during any air blow test, and "after the air blow test as defined herein" may be after any air blow test is completed.

[0083] Please continue reading Figure 1 The high and low temperature testing device 100 further includes a control unit 90 , and the control unit 90 is electrically connected to the zero gas delivery assembly 20 and the standard gas delivery assembly 30 .

[0084] The high and low temperature testing device 100 performs high temperature testing and low temperature testing on the alcohol detector A, including the following steps S11, S12, S13 and S14.

[0085] S11: The operator places the alcohol detector A in the calibration box 10, and connects the gas input interface of the alcohol detector A to the output end 302 of the standard gas delivery component 30. It can be understood that the alcohol detector A and the output end 302 of the standard gas delivery component 30 are connected to each other, and the standard gas delivery component 30 can deliver the standard gas from the gas input interface of the alcohol detector A to the inside of the alcohol detector A.

[0086] S12: The control unit 90 controls the zero gas delivery assembly 20 to deliver zero gas of a set temperature into the calibration box 10, so that the temperature in the calibration box 10 is maintained at the target temperature.

[0087] S13: The control unit 90 controls the standard gas delivery component 30 to introduce standard gas into the alcohol detector A. At the same time, the control unit 90 controls the zero gas delivery component 20 to continuously introduce zero gas of a set temperature into the calibration box 10, so that the temperature in the calibration box 10 is maintained at the target temperature, and the exhaust gas in the calibration box 10 is discharged from the exhaust port 14 during two adjacent air blowing tests.

[0088] Exemplarily, after a set time (such as 2 hours), the control unit 90 controls the standard gas delivery component 30 to pass ethanol standard gas with a flow rate of 15L / min, a temperature of (34±0.5)°C, and a concentration of approximately 0.40mg / L into the alcohol detector A, and tests the alcohol detector A 5 times at intervals of 5 minutes; during this process, the zero gas delivery component 20 continuously passes zero gas of a set temperature into the calibration box 10 to maintain the temperature inside the calibration box 10 at the target temperature.

[0089] S14: After multiple blowing tests on the alcohol detector A are completed, the control unit 90 controls the standard gas delivery component 30 to stop supplying standard gas to the alcohol detector A, and the control unit 90 controls the zero gas delivery component 20 to continuously supply zero gas of a set temperature into the calibration box 10 to clean the calibration space of the calibration box 10.

[0090] It should be particularly noted that after the above step S14, if it is necessary to perform high and low temperature tests on other alcohol detectors, continue to introduce zero gas of the set temperature into the calibration box 10 to make the target temperature reach the calibration box 10 before performing high and low temperature tests on other alcohol detectors; after the above step S14, if it is not necessary to perform high and low temperature tests on other alcohol detectors, stop introducing zero gas into the calibration box 10.

[0091] Optionally, the control unit 90 is also used to receive a control signal. If after step S14, the control unit 90 receives a control signal to stop the high and low temperature test, the zero gas delivery component 20 is controlled to stop delivering zero gas to the calibration space 13; if after step S14, the control unit 90 does not receive a control signal to stop the high and low temperature test, the zero gas delivery component 20 is controlled to continue delivering zero gas of the set temperature to the calibration space 13. Specifically, it may also include a button or a touch screen electrically connected to the control unit 90, and the operator may send a control signal to stop the high and low temperature test to the control unit 90 through the button or the touch screen.

[0092] Among them, the difference between the high temperature test and the low temperature test of the alcohol detector A by the high and low temperature testing device 100 is that during the high temperature test, the target temperature in each step is (40±2)°C; during the low temperature test, the target temperature in each step is (0±2)°C.

[0093] During the high temperature test, it is necessary to transport high temperature zero gas into the calibration box 10 so that the target temperature is reached in the calibration box 10. The temperature of the zero gas is higher than the temperature of the external environment. The zero gas will exchange heat with the external environment to reduce the temperature. If the set temperature of the zero gas is equal to the target temperature, the target temperature may not be reached in the calibration box 10. Therefore, the set temperature of the zero gas should be higher than the target temperature to compensate for the temperature loss caused by the heat exchange between the zero gas and the outside world, so that the target temperature can be reached in the calibration box 10. The set temperature of the zero gas depends on the thermal insulation performance of the equipment. If the thermal insulation performance is very good, the temperature drop caused by the heat exchange between the zero gas and the external environment is very small, and the set temperature of the zero gas can also be equal to the target temperature.

[0094] During the low temperature test, it is necessary to transport low temperature zero gas into the calibration box 10 so that the target temperature is reached in the calibration box 10. The temperature of the zero gas is lower than the temperature of the external environment. The zero gas will exchange heat with the external environment to increase the temperature. If the set temperature of the zero gas is equal to the target temperature, the target temperature may not be reached in the calibration box 10. Therefore, the set temperature of the zero gas should be lower than the target temperature to compensate for the temperature increase caused by the heat exchange between the zero gas and the outside world, so that the target temperature can be reached in the calibration box 10. The set temperature of the zero gas depends on the thermal insulation performance of the equipment. If the thermal insulation performance is very good, the temperature increase caused by the heat exchange between the zero gas and the external environment is very small, and the set temperature of the zero gas can also be equal to the target temperature.

[0095] For example, in the embodiment of the present application, after the operator places the alcohol detector A in the calibration box 10 and connects the gas input interface of the alcohol detector A to the standard gas delivery assembly 30, the overall high and low temperature test process is as follows:

[0096] (1) The zero gas delivery component 20 delivers zero gas of a set temperature to the calibration space 13, so that the temperature of the calibration space 13 reaches the target temperature, and the standard gas delivery component 30 does not deliver standard gas;

[0097] (2) The standard gas delivery component 30 delivers standard gas to perform the first blowing test on the alcohol detector A, and the zero gas delivery component 20 delivers zero gas of a set temperature to keep the temperature of the calibration space 13 at the target temperature;

[0098] (3) The standard gas delivery component 30 stops delivering the standard gas, and the zero gas delivery component 20 delivers zero gas of a set temperature to the calibration space 13, so that the temperature of the calibration space 13 is maintained at the target temperature, and at the same time, the waste gas of the calibration space 13 is discharged from the exhaust port 14;

[0099] (4) The standard gas delivery component 30 delivers standard gas to perform a second blowing test on the alcohol detector A, and the zero gas delivery component 20 delivers zero gas of a set temperature to keep the temperature of the calibration space 13 at the target temperature;

[0100] (5) The standard gas delivery component 30 stops delivering the standard gas, and the zero gas delivery component 20 delivers zero gas of the set temperature to the calibration space 13, so that the temperature of the calibration space 13 is maintained at the target temperature, and at the same time, the exhaust gas of the calibration space 13 is discharged from the exhaust port 14.

[0101] discharge;

[0102] (6) The standard gas delivery component 30 delivers standard gas to perform a third blowing test on the alcohol detector A, and the zero gas delivery component 20 delivers zero gas of a set temperature to keep the temperature of the calibration space 13 at the target temperature;

[0103] (7) The standard gas delivery component 30 stops delivering the standard gas, and the zero gas delivery component 20 delivers zero gas of the set temperature to the calibration space 13, so that the temperature of the calibration space 13 is maintained at the target temperature, and at the same time, the exhaust gas of the calibration space 13 is discharged from the exhaust port 14.

[0104] discharge;

[0105] (8) The standard gas delivery component 30 delivers standard gas to perform the fourth blowing test on the alcohol detector A, and the zero gas delivery component 20 delivers zero gas of a set temperature to keep the temperature of the calibration space 13 at the target temperature;

[0106] (9) The standard gas delivery component 30 stops delivering the standard gas, and the zero gas delivery component 20 delivers zero gas of the set temperature to the test space 13, so that the temperature of the test space 13 is maintained at the target temperature, and at the same time, the exhaust gas of the test space 13 is discharged from the exhaust port 14.

[0107] discharge;

[0108] (10) The standard gas delivery component 30 delivers standard gas to perform the fifth blowing test on the alcohol detector A. The zero gas delivery component

[0109] Component 20 delivers zero air of set temperature to keep the temperature of the test space 13 at the target temperature;

[0110] (11) The standard gas delivery component 30 stops delivering the standard gas, and the zero gas delivery component 20 delivers zero gas of a set temperature to the calibration space 13 , and exhausts the waste gas in the calibration space 13 from the exhaust port 14 .

[0111] After the above step (11), if it is necessary to perform high and low temperature tests on other alcohol detectors, continue to introduce zero gas of the set temperature into the calibration box 10 to make the target temperature reach the calibration box 10 before performing high and low temperature tests on other alcohol detectors; after the above step (11), if it is not necessary to perform high and low temperature tests on other alcohol detectors, stop introducing zero gas into the calibration box 10.

[0112] It should be noted that before each breath test, it is necessary to ensure that there is no residual alcohol waste gas in the inspection space 13, or in other words, before each breath test, it is necessary to ensure that the alcohol concentration in the inspection space 13 is within a preset range without affecting the accuracy of the current breath test.

[0113] like Figure 2 and Figure 3As shown, the high and low temperature test device 100 also includes an alcohol sensor 18, which is arranged in the calibration box 10, and the alcohol sensor 18 is used to detect the alcohol concentration of the calibration space 13. The alcohol sensor 18 is electrically connected to the control unit 90, and the alcohol sensor 18 detects the alcohol concentration of the calibration space 13 under the control of the control unit 90. Before the high and low temperature test device 100 performs a blow test on the alcohol detector A, the control unit 90 controls the alcohol sensor 18 to detect the alcohol concentration value of the calibration space 13; if the current alcohol concentration value is not higher than the preset alcohol concentration value, the control unit 90 controls the zero gas delivery component 20 to deliver zero gas of the set temperature to the calibration space 13, and controls the standard gas delivery component 30 to deliver standard gas to the alcohol detector A. If the current alcohol concentration value is higher than the preset alcohol concentration value, the control unit 90 controls the zero gas delivery component 20 to continue to deliver zero gas of the set temperature to the calibration space 13, so that the exhaust gas of the calibration space 13 is discharged from the exhaust port 14, and the temperature of the calibration space 13 reaches the target temperature.

[0114] like Figure 2 and Figure 3 As shown, the zero gas delivery assembly 20 includes a zero gas delivery pipeline 21 and a zero gas temperature control unit 20a. The input end 213 of the zero gas delivery pipeline 21 is used to input zero gas, and the input end 213 of the zero gas delivery pipeline 21 can also be called a zero gas inlet 213. The input end 213 of the zero gas delivery pipeline 21 can be connected to an air compressor or a zero gas tank. The output end 212 of the zero gas delivery pipeline 21 is connected to the calibration space 13, and the zero gas delivery pipeline 21 is used to deliver zero gas of a set temperature to the calibration space 13. When the input end 213 of the zero gas delivery pipeline 21 is connected to a compressor or a zero gas tank, a zero gas control valve 23 is provided on the zero gas delivery pipeline 21, and the zero gas control valve 23 is used to control the opening and closing of the zero gas delivery pipeline 21, and the zero gas control valve 23 is also used to reduce the pressure of the compressed gas delivered to the zero gas delivery pipeline 21 by the air compressor.

[0115] The zero gas temperature control unit 20a is arranged on the zero gas delivery pipeline 21. It should be understood that the zero gas temperature control unit 20a is arranged between the input end 213 and the output end 212 of the zero gas delivery pipeline 21. The zero gas temperature control unit 20a is used to control the temperature of the zero gas output from the zero gas delivery pipeline 21 to reach the set temperature. Exemplarily, the zero gas temperature control unit 20a is electrically connected to the control unit 90. Under the control of the control unit 90, the zero gas temperature control unit 20a can heat and cool the zero gas flowing through the zero gas temperature control unit 20a, so as to control the temperature of the zero gas output from the zero gas delivery pipeline 21 to the set temperature.

[0116] Exemplarily, the zero gas temperature control unit 20a includes a zero gas refrigerator 25 and a zero gas heater 26. The zero gas refrigerator 25 is arranged on the zero gas delivery pipeline 21, and the zero gas refrigerator 25 is used to cool the zero gas flowing through the zero gas refrigerator 25; the zero gas heater 26 is arranged on the zero gas delivery pipeline 21, and the zero gas heater 26 is arranged downstream of the zero gas refrigerator 25, and the zero gas heater 26 is used to heat the zero gas flowing through the zero gas heater 26.

[0117] It should be noted that the control accuracy of the refrigeration device in the prior art is generally worse than that of the heating device. The reason is that the heating device generally adopts resistance wire heating and PID control, which has a fast response time and thus a high temperature control accuracy. However, the control process of the refrigeration device, whether it is a semiconductor refrigerator or a compressor refrigerator, is complex and the control response time is slow, so the temperature control accuracy is low. In order to solve the technical problem in the prior art that the accuracy of the refrigeration device in the cooling state is not as high as that of the heating device in the heating state, during the low temperature test of the alcohol detector A by the high and low temperature test device 100 of the embodiment of the present application, the zero gas refrigerator 25 cools the zero gas flowing through the zero gas refrigerator 25 to a first temperature (for example, -2°C), and the first temperature is lower than the set temperature (for example, 0°C); the zero gas heater 26 heats the zero gas output from the zero gas refrigerator 25 so that the temperature of the zero gas output from the zero gas delivery pipeline 21 reaches the set temperature. In this embodiment, the control unit 90 is electrically connected to the zero gas refrigerator 25 and the zero gas heater 26. When the high and low temperature testing device 100 performs a low temperature test on the alcohol detector A, the control unit 90 controls the zero gas refrigerator 25 to cool the zero gas flowing through the zero gas refrigerator 25 to a first temperature; then the control unit 90 controls the zero gas heater 26 to heat the zero gas output from the zero gas refrigerator 25 so that the temperature of the zero gas output from the zero gas delivery pipeline 21 reaches the set temperature.

[0118] During the low temperature test of the alcohol detector A by the high and low temperature test device 100 of the embodiment of the present application, the zero gas is first cooled to a first temperature below the set temperature by the zero gas refrigerator 25, and then the zero gas is heated to reach the set temperature by the zero gas heater 26, which is equivalent to first roughly adjusting the temperature of the zero gas by the zero gas refrigerator 25 with lower adjustment accuracy, and then finely adjusting the temperature of the zero gas by the zero gas heater 26 with higher adjustment accuracy, so that the zero gas temperature output by the zero gas delivery pipeline 21 is finally accurately controlled, and then the temperature of the calibration space 13 in the calibration box 10 can be accurately controlled to reach the target temperature. Compared with the technical solution of directly performing cooling or heating, the embodiment of the present application can improve the accuracy of the zero gas temperature. The technical solution of first cooling and then heating to achieve cooling is exemplified in combination with other drawings below.

[0119] It should be noted that, in the embodiment of the present application, the first temperature is lower than and close to the set temperature, for example, the first temperature is 2-4° C. lower than the set temperature. If the temperature difference is too large, it is not easy to achieve precise control during heating.

[0120] In this example, please continue to refer to Figure 2 and Figure 3 The high and low temperature test device 100 also includes a second zero gas temperature sensor 251, which is arranged at the output end of the zero gas refrigerator 25, and is used to detect the temperature of the zero gas at the output end of the zero gas refrigerator 25. In the embodiment of the present application, the second zero gas temperature sensor 251 is electrically connected to the control unit 90, and the second zero gas temperature sensor 251 detects the temperature of the zero gas at the output end of the zero gas refrigerator 25 under the control of the control unit 90. During the process of the high and low temperature test device 100 performing a low temperature test on the alcohol detector A, the control unit 90 first controls the zero gas refrigerator 25 according to the detection value of the second zero gas temperature sensor 251, so that the temperature of the zero gas at the output end of the zero gas refrigerator 25 is the first temperature and lower than the set temperature, and then controls the zero gas heater 26 to accurately heat the zero gas at the first temperature, so that the temperature of the zero gas at the output end of the zero gas delivery pipeline 21 reaches the set temperature, and then the temperature in the calibration box 10 accurately reaches the target temperature.

[0121] When the high and low temperature test device 100 performs a high temperature test on the alcohol detector A, the control unit 90 controls the zero gas heater 26 to heat the zero gas flowing through the zero gas heater 26, so that the zero gas at the output end of the zero gas delivery pipeline 21 reaches the set temperature. When the high and low temperature test device 100 performs a high temperature test on the alcohol detector A, the control unit 90 controls the zero gas refrigerator 25 to stop cooling the zero gas flowing through the zero gas refrigerator 25.

[0122] In the present embodiment, the zero-gas refrigerator 25 is a semiconductor refrigeration device, and the zero-gas heater 26 is a resistance heating device (referred to as an electric heater). Both semiconductor refrigeration devices and electric heating devices have the advantages of small size and simple structure, so that the overall device is more compact. It should be understood that the types of the zero-gas refrigerator 25 and the zero-gas heater 26 in the embodiment of the present application are not limited thereto, and other types of heating devices and refrigeration devices can also be used. Other types of refrigeration devices are illustrated below in conjunction with other figures. Therefore, the control method of cooling first and then heating in the embodiment of the present application is not only applicable to the case of semiconductor device cooling and electric heating device heating, but can also be applied to other refrigeration devices and heating devices.

[0123] In some cases, the electric heating device is heated by an electric heating wire, and its temperature control technology is very mature. Through PID control, the temperature of the gas output by the zero gas heater 26 can quickly and accurately reach the required temperature. However, when controlling the semiconductor refrigeration device, it is necessary to transmit specific pulses to it to control the cooling capacity, the response is slow, and the control process is relatively complicated, making it difficult to accurately reach the required temperature of the gas output. Therefore, in the process of performing a low-temperature test on the alcohol detector A in the high and low temperature test device 100 of the embodiment of the present application, the zero gas is first cooled to a first temperature below the set temperature by the zero gas refrigerator 25, and then the zero gas is heated to reach the set temperature by the zero gas heater 26, thereby improving the accuracy of the temperature of the zero gas.

[0124] like Figure 4 As shown, Figure 4 The high and low temperature test device 100 and Figure 3 The difference between the high and low temperature test device 100 shown is that the high and low temperature test device 100 performs a different low temperature test on the alcohol detector A. For example, Figure 4 During the low temperature test of the alcohol detector A by the high and low temperature test device 100 shown, the zero gas refrigerator 25 cools the zero gas flowing through the zero gas refrigerator 25 under the control of the control unit 90, so that the zero gas at the output end of the zero gas refrigerator 25 reaches the set temperature, and no longer flows through the zero gas heater 26 for heating. For example, after the zero gas at the output end of the zero gas refrigerator 25 reaches the set temperature, it is directly transported to the calibration space 13 through the zero gas delivery pipeline 21. Specifically, the zero gas refrigerator 25 and the zero gas heater 26 are arranged in parallel between the input end 213 and the output end 212 of the zero gas delivery pipeline 21, so that the zero gas output by the zero gas refrigerator 25 will not be passed into the zero gas heater 26, but will be directly transported to the output end 212 of the zero gas delivery pipeline 21. In an optional embodiment of the present application, Figure 4 The high and low temperature test device 100 shown also includes a two-position three-way valve 27, which is arranged on the zero gas delivery pipeline 21, and the gas input port of the two-position three-way valve 27 is connected to the input end 213 of the zero gas delivery pipeline 21, and the two output ports of the two-position three-way valve 27 are respectively connected to the zero gas refrigerator 25 and the zero gas heater 26. Thus, the zero gas can be selectively delivered to the zero gas refrigerator 25 or the zero gas heater 26 through the two-position three-way valve 27. Exemplarily, the gas input port of the two-position three-way valve 27 and the input end 213 of the zero gas delivery pipeline 21 can be provided with other components, such as a zero gas flow controller 24 and a zero gas control valve 23, and the zero gas flow controller 24 and the zero gas control valve 23 are further described in detail below.

[0125] In other embodiments, the zero air may also be cooled by a compressor and an evaporator. Figure 5As shown, the zero-gas refrigerator 25 includes a compressor 25a, a condenser 25b, an expansion valve 25c and an evaporator 25d. The output end of the compressor 25a is connected to the input end of the condenser 25b, the output end of the condenser 25b is connected to the input end of the evaporator 25d through the expansion valve 25c, and the output end of the evaporator 25d is connected to the input end of the compressor 25a.

[0126] When the equipment is running, the compressor 25a compresses the refrigerant and transports it to the condenser 25b. The temperature of the compressed refrigerant increases and releases heat in the condenser 25b. The refrigerant that releases heat in the condenser 25b flows through the expansion valve 25c. The refrigerant expands in volume after flowing through the expansion valve 25c and its temperature decreases. The refrigerant with reduced temperature is transported to the evaporator 25d and absorbs heat from the evaporator 25d. Finally, the refrigerant that has absorbed heat from the evaporator 25d flows back to the compressor 25a, thereby forming a cycle to continuously transfer heat from the evaporator 25d to the condenser 25b, so that the temperature of the evaporator 25d decreases. The evaporator 25d is arranged on the zero gas transmission pipeline 21 and is located upstream of the second zero gas temperature sensor 251. When the zero gas flows through the evaporator 25d, due to the low temperature of the evaporator 25d, the evaporator 25d can absorb heat from the compressed gas flowing through it, so as to reduce the temperature of the compressed gas flowing through it.

[0127] Please continue reading Figure 2-Figure 5 The high and low temperature test device 100 further includes a zero gas flow controller 24, which is disposed on the zero gas delivery pipeline 21, the zero gas flow controller 24 is disposed upstream of the zero gas temperature control unit 20a, and the zero gas flow controller 24 is disposed downstream of the zero gas control valve 23, and the zero gas flow controller 24 is used to adjust the flow rate of zero gas output from the zero gas delivery pipeline 21. The zero gas flow controller 24 is electrically connected to the control unit 90, and the zero gas flow controller 24 adjusts the flow rate of zero gas output from the zero gas delivery pipeline 21 under the control of the control unit 90.

[0128] In this embodiment, during the high and low temperature test of the alcohol detector A by the high and low temperature test device 100, the zero gas flow controller 24 adjusts the flow rate of the zero gas delivered by the zero gas delivery pipeline 21 to remain constant, so that the flow rate flowing through the zero gas refrigerator 25 and the zero gas heater 26 is constant, preventing temperature fluctuations caused by flow fluctuations, so that the zero gas delivery pipeline 21 delivers zero gas with stable temperature, so that the temperature in the calibration box 10 remains constant.

[0129] It should be noted that when the zero gas delivery component 20 delivers zero gas to discharge the waste gas in the calibration space 13 from the exhaust port 14, it is necessary to ensure that the pressure of the calibration space 13 is within a reasonable range, or within a preset pressure range, to avoid excessive pressure in the calibration space 13.

[0130] like Figure 2and Figure 3 As shown, the high and low temperature test device 100 further includes a calibration pressure sensor 17, which is disposed in the calibration box 10 and is used to detect the pressure of the calibration space 13. The calibration pressure sensor 17 is electrically connected to the control unit 90, and the calibration pressure sensor 17 detects the pressure of the calibration space 13 under the control of the control unit 90.

[0131] The zero gas flow controller 24 is also used to adjust the flow of zero gas delivered to the calibration space 13 by the zero gas delivery pipeline 21 according to the pressure value detected by the calibration pressure sensor 17, so that the pressure of the calibration space 13 is maintained within a preset pressure range.

[0132] In an optional embodiment, please continue to refer to Figure 2-Figure 5 , the zero gas delivery assembly 20 also includes a first zero gas temperature sensor 29, which is disposed at the output end 212 of the zero gas delivery pipeline 21. In one case, the first zero gas temperature sensor 29 is directly disposed at the output end 212 of the zero gas delivery pipeline 21, that is, a position close to or adjacent to the calibration box 10. In another case, the first zero gas temperature sensor 29 is directly disposed on the calibration box 10, and is located at a position corresponding to the output end 212 of the zero gas delivery pipeline 21. In yet another case, the first zero gas temperature sensor 29 is disposed on other components such as the first connecting component 11, the first connecting component 11 connects the output end 212 of the zero gas delivery pipeline 21 and the calibration box 10, and the first connecting component 11 connects the zero gas delivery pipeline 21 and the calibration space 13 in the calibration box 10.

[0133] The first zero gas temperature sensor 29 is used to detect the temperature of the zero gas outputted from the output end 212 of the zero gas delivery pipeline 21. The first zero gas temperature sensor 29 is electrically connected to the control unit 90. The first zero gas temperature sensor 29 detects the temperature of the zero gas outputted from the output end 212 of the zero gas delivery pipeline 21 under the control of the control unit 90.

[0134] The zero gas temperature control unit 20a is used to control the temperature of the zero gas flowing through the zero gas temperature control unit 20a according to the temperature value detected by the first zero gas temperature sensor 29, so that the zero gas outputted from the output end 212 of the zero gas delivery pipeline 21 reaches the set temperature.

[0135] In an optional embodiment, a calibration temperature sensor 16 is provided in the calibration box 10, and the calibration temperature sensor 16 is used to detect the temperature of the calibration space 13, especially the calibration temperature sensor 16 is used to detect the temperature of the calibration space 13 near the alcohol detector A. The calibration temperature sensor 16 is electrically connected to the control unit 90, and the calibration temperature sensor 16 detects the temperature of the calibration space 13 under the control of the control unit 90.

[0136] Exemplarily, the calibration temperature sensor 16 is disposed in the calibration box 10, and is close to the position of the calibration box 10 for installing the alcohol detector A. After the alcohol detector A is loaded into the calibration box 10, the calibration temperature sensor 16 and the alcohol detector A are adjacent, so that the temperature near the alcohol detector A can be ensured to reach the target temperature. Therefore, even if there is a situation where the temperature of the calibration space 13 is uneven, the calibration temperature sensor 16 and the alcohol detector A are adjacent in the embodiment of the present application, so that the temperature near the alcohol detector A can be ensured to reach the target temperature, thereby improving the accuracy of the high and low temperature test results of the alcohol detector A by the high and low temperature test device 100.

[0137] The zero gas temperature control unit 20 a is used to control the temperature of the zero gas flowing through the zero gas temperature control unit 20 a according to the temperature value detected by the calibration temperature sensor 16 , so that the temperature of the calibration space 13 reaches the target temperature.

[0138] In an optional embodiment, a calibration temperature sensor 16 is provided in the calibration box 10, and the zero gas delivery assembly 20 also includes a first zero gas temperature sensor 29. The zero gas temperature control unit 20a is used to control the zero gas temperature flowing through the zero gas temperature control unit 20a according to the temperature value detected by the calibration temperature sensor 16 and the temperature value detected by the first zero gas temperature sensor 29.

[0139] Exemplarily, when the temperature value detected by the first zero gas temperature sensor 29 reaches the set temperature and the temperature value detected by the verification temperature sensor 16 reaches the target temperature, the control unit 90 controls the zero gas temperature control unit 20a to maintain the current heat so that the temperature value detected by the verification temperature sensor 16 is maintained at the target temperature.

[0140] Exemplarily, when the temperature value detected by the first zero air temperature sensor 29 reaches the set temperature and the temperature value detected by the verification temperature sensor 16 is lower than the target temperature, the control unit 90 controls the zero air temperature control unit 20a to increase the heating amount so that the temperature value detected by the verification temperature sensor 16 reaches the target temperature.

[0141] Exemplarily, when the temperature value detected by the first zero air temperature sensor 29 reaches the set temperature and the temperature value detected by the verification temperature sensor 16 is higher than the target temperature, the control unit 90 controls the zero air temperature control unit 20a to reduce the heating amount or stop heating so that the temperature value detected by the verification temperature sensor 16 reaches the target temperature.

[0142] In an optional embodiment, the high and low temperature test device 100 further includes an alarm unit 80, and the alarm unit 80 is electrically connected to the control unit 90. When the control unit 90 determines that the first zero gas temperature sensor 29 and / or the verification temperature sensor 16 are abnormal, the control unit 90 controls the alarm unit 80 to issue an alarm message, and the alarm message includes but is not limited to voice information, text display information, and indicator information. Exemplarily, when the temperature value detected by the first zero gas temperature sensor 29 is lower than the set temperature, and the temperature value detected by the verification temperature sensor 16 reaches the target temperature, the control unit 90 controls the alarm unit 80 to issue an alarm message.

[0143] Please continue reading Figure 2-Figure 5 The standard gas delivery component 30 includes a temperature control box 31, a standard gas tank 32, a standard gas control valve 33, a standard gas flow controller 34, and a standard gas heater 36. The standard gas tank 32, the standard gas control valve 33, and the standard gas flow controller 34 are all arranged in the temperature control box 31; the standard gas in the standard gas tank 32 is kept at a constant temperature by an overall constant temperature method, so that the standard gas in the standard gas tank 32 reaches the temperature of the environment in the temperature control box 31, so that the temperature of the standard gas delivered by the standard gas delivery component 30 is more accurate. Compared with the prior art in which the standard gas can be heated only when the standard gas is output, the standard gas delivery component 30 of this embodiment can heat the standard gas before the standard gas is output, so the standard gas delivery component 30 of the embodiment of the present application has sufficient time for heat exchange.

[0144] The standard gas tank 32 is connected to the input end of the standard gas flow controller 34 through the standard gas control valve 33, and the output end of the standard gas flow controller 34 is connected to the alcohol detector A in the calibration box 10. In this embodiment, the output end of the standard gas flow controller 34 can be understood as the output end 302 of the standard gas delivery component 30.

[0145] The standard gas tank 32 is used to contain standard gas, such as ethanol standard gas. For example, the standard gas tank 32 contains ethanol standard gas with a concentration of 0.40 mg / L. The standard gas control valve 33 is used to control the opening and closing of the standard gas and to reduce the pressure of the standard gas. By controlling the opening and closing of the standard gas control valve 33, the standard gas can be output.

[0146] The standard gas flow controller 34 is used to adjust the flow rate of the standard gas. The standard gas flow controller 34 is electrically connected to the control unit 90. The standard gas flow controller 34 adjusts the flow rate of the standard gas under the control of the control unit 90.

[0147] The standard gas heater 36 is used to heat the temperature control box 31 to a desired temperature. The standard gas heater 36 is electrically connected to the control unit 90 . The standard gas heater 36 heats the temperature control box 31 to a desired temperature under the control of the control unit 90 .

[0148] In an optional embodiment of the present application, the standard gas delivery assembly 30 further includes a first standard gas temperature sensor 37, which is disposed in the temperature control box 31, and is used to detect the temperature in the temperature control box 31. The first standard gas temperature sensor 37 is electrically connected to the control unit 90, and the first standard gas temperature sensor 37 detects the temperature in the temperature control box 31 under the control of the control unit 90.

[0149] Exemplarily, the standard gas heater 36 is used to control the heating inside the temperature control box 31 to a desired temperature according to the temperature value detected by the first standard gas temperature sensor 37 .

[0150] In an optional embodiment of the present application, the standard gas delivery component 30 also includes a second standard gas temperature sensor 39, which is arranged at the output end 302 of the standard gas delivery component 30. In one case, the second standard gas temperature sensor 39 is directly arranged at the output end 302 of the standard gas delivery component 30, that is, close to or adjacent to the calibration box 10. In another case, the second standard gas temperature sensor 39 is directly arranged on the calibration box 10 and is located at a position corresponding to the output end 302 of the standard gas delivery component 30. In another case, the second standard gas temperature sensor 39 is arranged on other components such as the second connecting component 12, the output end 302 of the standard gas delivery component 30 is connected and communicated with the second connecting component 12, the second connecting component 12 is connected and communicated with the mouthpiece 15, and the mouthpiece 15 is used to connect and communicate with the alcohol detector A placed in the calibration space 13.

[0151] The second standard gas temperature sensor 39 is used to detect the temperature of the standard gas delivered by the output end 302 of the standard gas delivery component 30. The second standard gas temperature sensor 39 is electrically connected to the control unit 90, and the second standard gas temperature sensor 39 detects the temperature of the standard gas delivered by the output end 302 of the standard gas delivery component 30 under the control of the control unit 90.

[0152] Exemplarily, the standard gas heater 36 is used to heat the temperature of the standard gas output from the output end 302 of the standard gas delivery component 30 to a desired temperature according to the temperature value detected by the second standard gas temperature sensor 39 .

[0153] In an optional embodiment of the present application, the standard gas delivery component 30 also includes a first standard gas temperature sensor 37 and a second standard gas temperature sensor 39, and the standard gas heater 36 is used to heat the standard gas delivered by the output end 302 of the standard gas delivery component 30 to a required temperature based on the temperature value detected by the first standard gas temperature sensor 37 and the temperature value detected by the second standard gas temperature sensor 39.

[0154] Exemplarily, when the temperature value detected by the first standard gas temperature sensor 37 reaches the required temperature, and the temperature value detected by the second standard gas temperature sensor 39 reaches the required temperature, the control unit 90 controls the standard gas heater 36 to maintain the current heating amount so that the temperature value detected by the second standard gas temperature sensor 39 is maintained at the required temperature.

[0155] Exemplarily, when the temperature value detected by the first standard gas temperature sensor 37 reaches the required temperature and the temperature value detected by the second standard gas temperature sensor 39 is lower than the required temperature, the control unit 90 controls the standard gas heater 36 to increase the heating amount until the temperature value detected by the second standard gas temperature sensor 39 reaches the required temperature.

[0156] Exemplarily, when the temperature value detected by the first standard gas temperature sensor 37 reaches the required temperature and the temperature value detected by the second standard gas temperature sensor 39 is higher than the required temperature, the control unit 90 controls the standard gas heater 36 to reduce the heating amount or stop heating until the temperature value detected by the second standard gas temperature sensor 39 reaches the required temperature.

[0157] In an optional embodiment, the control unit 90 controls the alarm unit 80 to issue an alarm message when determining that the first standard gas temperature sensor 37 and / or the second standard gas temperature sensor 39 are abnormal. Exemplarily, when the temperature value detected by the first standard gas temperature sensor 37 is lower than the required temperature, and the temperature value detected by the second standard gas temperature sensor 39 reaches the required temperature, the control unit 90 controls the alarm unit 80 to issue an alarm message.

[0158] In order to reduce heat loss in the temperature control box 31 and maintain the temperature in the temperature control box 31 , the side walls of the temperature control box 31 are provided with heat insulating materials.

[0159] In order to make the temperature in the temperature control box 31 more uniform, a circulating fan may be provided in the temperature control box 31 to allow air to flow in the temperature control box 31 , thereby making the temperature in the temperature control box 31 more uniform.

[0160] In this embodiment, a cooling fan can also be provided. When the temperature control box 31 is heated by the standard gas heater 36, if the temperature detected by the first standard gas temperature sensor 37 exceeds the required temperature, the cooling fan can be started to transport the air with lower temperature in the external environment into the temperature control box 31, so as to reduce the temperature in the temperature control box 31 to the required temperature.

[0161] like Figure 6 As shown, the high and low temperature test device 100 also includes an exhaust pipeline 40, on which an exhaust fan 41 and an exhaust check valve 42 are provided. The exhaust fan 41 is used to improve the efficiency of exhausting the gas in the calibration box 10, and the exhaust check valve 42 is used to prevent the gas from flowing back. The exhaust fan 41 can be controlled according to the calibration pressure sensor 17 in the calibration box 10. When the calibration pressure sensor 17 detects that the pressure in the calibration box 10 exceeds the set value, the exhaust fan 41 is turned on to exhaust the excess gas in the calibration box 10. The exhaust fan 41 can also continue to operate during the calibration process to exhaust the gas in the calibration box 10.

[0162] The high and low temperature testing device 100 provided in the embodiment of the present application is introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A high and low temperature test device for an alcohol detector, characterized in that: include: A test box (10), the test box (10) comprising a test space (13) for accommodating the alcohol detector A to be tested and an exhaust port (14) communicating with the test space (13) and the alcohol detector A; A zero gas delivery component (20), wherein an output end (212) of the zero gas delivery component (20) is in communication with the calibration space (13) and is used for delivering zero gas to the calibration space (13); A standard gas delivery component (30), wherein an output end (302) of the standard gas delivery component (30) is in communication with the alcohol detector A in the calibration box (10) and is used for delivering standard gas to the alcohol detector A in the calibration box (10); Before the high and low temperature test device (100) performs a blowing test on the alcohol detector A, the zero air delivery component (20) delivers zero air of a set temperature to the calibration space (13) so that the temperature of the calibration space (13) reaches a target temperature; During the process of the high and low temperature test device (100) performing a blow test on the alcohol detector A, the zero gas delivery component (20) delivers zero gas of a set temperature to the calibration space (13) so that the temperature of the calibration space (13) is maintained at a target temperature, and at the same time, the standard gas delivery component (30) delivers standard gas to the alcohol detector A in the calibration box (10) for performing a blow test; After the high and low temperature test device (100) completes the air blowing test on the alcohol detector A, the standard gas delivery component (30) stops delivering the standard gas to the alcohol detector A in the calibration box (10), and the zero gas delivery component (20) delivers zero gas of a set temperature to the calibration space (13), so that the exhaust gas of the calibration space (13) is discharged from the exhaust port (14).

2. The high and low temperature test device for alcohol detector according to claim 1, characterized in that: An alcohol sensor (18) is provided in the inspection box (10) for detecting the alcohol concentration in the inspection space (13); The high and low temperature test device (100) further comprises a control unit (90), wherein the control unit (90) is electrically connected to the zero gas delivery component (20), the standard gas delivery component (30) and the alcohol sensor (18); Before the high and low temperature test device (100) performs a blow test on the alcohol detector A, the control unit (90) controls the alcohol sensor (18) to detect the current alcohol concentration value of the calibration space (13); If the current alcohol concentration value is not higher than the preset alcohol concentration value, the control unit (90) controls the zero gas delivery component (20) to deliver zero gas of a set temperature to the inspection space (13), and controls the standard gas delivery component (30) to deliver standard gas to the alcohol detector A; If the current alcohol concentration value is higher than the preset alcohol concentration value, the control unit (90) controls the zero air delivery component (20) to deliver zero air of a set temperature to the inspection space (13), so that the exhaust gas of the inspection space (13) is discharged from the exhaust port (14), and the temperature of the inspection space (13) reaches a target temperature.

3. The high and low temperature test device for alcohol detector according to claim 1, characterized in that: The zero air delivery assembly (20) comprises: A zero gas delivery pipeline (21), whose input end (213) is used to input zero gas, and whose output end (212) is connected to the calibration space (13) and is used to deliver zero gas of a set temperature to the calibration space (13); A zero gas temperature control unit (20a) is arranged on the zero gas delivery pipeline (21), and the zero gas temperature control unit (20a) is used to control the temperature of the zero gas output by the zero gas delivery pipeline (21) to reach a set temperature.

4. The high and low temperature test device for alcohol detector according to claim 3, characterized in that: The zero air temperature control unit (20a) comprises: A zero gas refrigerator (25) is arranged on the zero gas delivery pipeline (21) and is used to cool the zero gas flowing through the zero gas refrigerator (25); A zero gas heater (26) is arranged on the zero gas delivery pipeline (21) and downstream of the zero gas refrigerator (25), and the zero gas heater (26) is used to heat the zero gas flowing through the zero gas heater (26); During the low temperature test of the alcohol detector A by the high and low temperature test device (100), the zero gas refrigerator (25) cools the zero gas flowing through the zero gas refrigerator (25) to a first temperature, and the first temperature is lower than a set temperature; the zero gas heater (26) heats the zero gas output from the zero gas refrigerator (25) so that the temperature of the zero gas output from the zero gas delivery pipeline (21) reaches the set temperature.

5. The high and low temperature test device for alcohol detector according to claim 3, characterized in that: The zero gas delivery assembly (20) further comprises: a first zero gas temperature sensor (29), which is arranged at the output end (212) of the zero gas delivery pipeline (21) and is used to detect the temperature of the zero gas outputted from the output end (212) of the zero gas delivery pipeline (21); The zero gas temperature control unit (20a) is used to control the temperature of the zero gas flowing through the zero gas temperature control unit (20a) according to the temperature value detected by the first zero gas temperature sensor (29), so that the zero gas outputted from the output end (212) of the zero gas delivery pipeline (21) reaches a set temperature.

6. The high and low temperature test device for alcohol detector according to claim 3, characterized in that: A calibration temperature sensor (16) is arranged in the calibration box (10), and the calibration temperature sensor (16) is used to detect the temperature of the calibration space (13); The zero air temperature control unit (20a) is used to control the temperature of the zero air flowing through the zero air temperature control unit (20a) according to the temperature value detected by the calibration temperature sensor (16), so that the temperature of the calibration space (13) reaches a target temperature.

7. The high and low temperature test device for alcohol detector according to claim 3, characterized in that: The zero air delivery assembly (20) further comprises: a first zero gas temperature sensor (29), arranged at the output end of the zero gas delivery pipeline (21), and used for detecting the temperature of the zero gas outputted from the output end (212) of the zero gas delivery pipeline (21); and A calibration temperature sensor (16), arranged in the calibration box (10) and used for detecting the temperature of the calibration space (13); The zero gas temperature control unit (20a) is used to adjust the temperature of the zero gas flowing through the zero gas temperature control unit (20a) according to the temperature value detected by the verification temperature sensor (16) and the temperature value detected by the first zero gas temperature sensor (29).

8. The high and low temperature test device for alcohol detector according to claim 7, characterized in that: The high and low temperature test device (100) further comprises a control unit (90), wherein the control unit (90) is electrically connected to the zero gas temperature control unit (20a), the first zero gas temperature sensor (29), the verification temperature sensor (16), and the standard gas delivery assembly (30); When the temperature value detected by the first zero-gas temperature sensor (29) reaches a set temperature and the temperature value detected by the verification temperature sensor (16) reaches a target temperature, the control unit (90) controls the zero-gas temperature control unit (20a) to maintain a current heating amount so that the temperature value detected by the verification temperature sensor (16) remains at the target temperature; When the temperature value detected by the first zero-gas temperature sensor (29) reaches a set temperature and the temperature value detected by the verification temperature sensor (16) is lower than a target temperature, the control unit (90) controls the zero-gas temperature control unit (20a) to increase the heating amount so that the temperature value detected by the verification temperature sensor (16) reaches the target temperature; When the temperature value detected by the first zero-air temperature sensor (29) reaches a set temperature and the temperature value detected by the verification temperature sensor (16) is higher than a target temperature, the control unit (90) controls the zero-air temperature control unit (20a) to reduce the heating amount or stop heating so that the temperature value detected by the verification temperature sensor (16) reaches the target temperature.

9. The high and low temperature test device for alcohol detector according to claim 1, characterized in that: The high and low temperature testing device (100) further comprises: A calibration pressure sensor (17), arranged in the calibration box (10) and used for detecting the pressure of the calibration space (13); A zero gas flow controller (24) is arranged on the zero gas delivery component (20) and is used to adjust the flow rate of zero gas delivered by the zero gas delivery component (20) to the calibration space (13) according to the pressure value detected by the calibration pressure sensor (17), so that the pressure of the calibration space (13) is maintained within a preset pressure range.

10. The high and low temperature test device for an alcohol detector according to any one of claims 1 to 9, characterized in that: The standard gas delivery assembly (30) comprises: A temperature control box (31), a standard gas tank (32), a standard gas control valve (33), a standard gas flow controller (34), and a standard gas heater (36), wherein the standard gas tank (32), the standard gas control valve (33), and the standard gas flow controller (34) are all arranged in the temperature control box (31); The standard gas tank (32) is connected to the input end of the standard gas flow controller (34) through the standard gas control valve (33), and the output end of the standard gas flow controller (34) is connected to the alcohol detector A in the calibration box (10); The standard gas tank (32) is used to contain standard gas; The standard gas control valve (33) is used to control the opening and closing of the standard gas and to reduce the pressure of the standard gas; The standard gas flow controller (34) is used to adjust the flow rate of the standard gas; The standard gas heater (36) is used to heat the temperature control box (31) to a required temperature.

11. The high and low temperature test device for alcohol detector according to claim 10, characterized in that: The standard gas delivery assembly (30) further comprises: a first standard gas temperature sensor (37) disposed in the temperature control box (31) and used to detect the temperature in the temperature control box (31); the standard gas heater (36) is used to heat the temperature control box (31) to a desired temperature according to the temperature value detected by the first standard gas temperature sensor (37); or The standard gas delivery component (30) further comprises: a second standard gas temperature sensor (39) disposed at the output end (302) of the standard gas delivery component (30) and used to detect the temperature of the standard gas delivered by the output end (302) of the standard gas delivery component (30); the standard gas heater (36) is used to heat the standard gas delivered by the output end (302) of the standard gas delivery component (30) to a desired temperature according to the temperature value detected by the second standard gas temperature sensor (39); or The standard gas delivery component (30) further comprises: a first standard gas temperature sensor (37) and a second standard gas temperature sensor (39); the first standard gas temperature sensor (37) is arranged in the temperature control box (31), and the first standard gas temperature sensor (37) is used to detect the temperature in the temperature control box (31); the second standard gas temperature sensor (39) is arranged at the output end (302) of the standard gas delivery component (30), and the second standard gas temperature sensor (39) is used to detect the temperature of the standard gas delivered by the output end (302) of the standard gas delivery component (30); the standard gas heater (36) is used to heat the standard gas delivered by the output end (302) of the standard gas delivery component (30) to a required temperature according to the temperature value detected by the first standard gas temperature sensor (37) and the temperature value detected by the second standard gas temperature sensor (39).

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