A flammable refrigerant sensor response time test device

Abstract

The utility model discloses a flammable refrigerant sensor response time test device, which belongs to the flammable refrigerant detection technology field; each concentration box of the box group stores flammable refrigerants of different set concentrations, and a fixed sleeve runs through each concentration box longitudinally. The fixed sleeve is provided with a through test port at each concentration box, and the movable sleeve of the movable test unit is slidably sealed with the fixed sleeve. The sensor to be tested is detachably installed on the movable sleeve, and the sensor to be tested is driven to each test port through the movable sleeve to detect the flammable refrigerants of different set concentrations in each concentration box. The test host receives the test information of the sensor to be tested and calculates the response time. The provided test device can be used to test the response time of the refrigeration sensor alone, and can also be used to test the response sensitivity of the sensor of the refrigerant monitoring system for the air-conditioning refrigeration system, and the test result is accurate and the operation process is safe and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of flammable refrigerant detection, and in particular provides a flammable refrigerant sensor response time testing device. Background Art

[0002] In recent years, with the approaching replacement of refrigerants, more and more environmentally friendly but flammable refrigerants have been used in the refrigeration and air-conditioning heat pump industries. The use of flammable refrigerants has made the safety performance of products a focus of attention in the industry. In order to ensure the safety of products, on the one hand, potential ignition sources are treated as non-ignition sources through design, and on the other hand, the refrigerant charge amount and the minimum room area for product use are limited to ensure that even if the flammable refrigerant leaks, there will be no risk of fire.

[0003] The limit on the amount of refrigerant charged has become a major problem restricting the development of the industry. In order to ensure product performance requirements, sufficient refrigerant is needed to achieve the cooling effect. On the other hand, in order to ensure product safety, excessive flammable refrigerant is not allowed to be used. The national standards such as the refrigerator safety standard GB 4706.13-2014, the commercial freezer safety standard GB 4706.102-2010, and the air conditioner safety standard GB4706.32-2012 have all set limits on the amount of refrigerant charged. The corresponding international standards IEC60335-2-24, IEC60335-2-89, IEC60335-2-40 and other standards also have clear limits on the amount of refrigerant charged. This restriction on product development is particularly prominent in commercial freezers and air conditioning heat pump products with large cooling capacity requirements. In order to solve this problem, the international air conditioner safety standard IEC60335-2-24, IEC60335-2-89, IEC60335-2-40 and other standards have all set limits on the amount of refrigerant charged. 60335-2-40:2022 first proposed a refrigerant monitoring system, which monitors the concentration of flammable refrigerants. Once a leak is found, auxiliary measures are taken to cut off product operation or ventilation to quickly dilute the flammable refrigerant and prevent possible combustion accumulation to ensure product safety. This method will also be applied in other product standards in the future. The use of a refrigerant monitoring system requires limiting the response time of the refrigerant sensor to ensure that it can respond quickly when a leak is detected. However, there is currently a lack of testing methods for the response time of refrigerant sensors, and there is no corresponding equipment to test it. Summary of the invention

[0004] Based on this, the utility model provides a test device for the response time of a flammable refrigerant sensor to detect the response time of the refrigerant sensor in a flammable refrigerant, thereby improving the accuracy of detection and the convenience of operation.

[0005] In order to achieve the above-mentioned purpose, in a first aspect, the utility model provides a flammable refrigerant sensor response time test device, comprising: a box group, which is divided into a plurality of concentration boxes by box walls arranged at intervals longitudinally, each of the concentration boxes respectively storing flammable refrigerants of different set concentrations; a fixed sleeve, which longitudinally penetrates each of the concentration boxes and has both ends extending out of the box group, and the fixed sleeve is provided with through test ports at each concentration box; a movable test unit, comprising a movable sleeve and a sensor to be tested, the movable sleeve and the fixed sleeve are slidingly sealed together, and the sensor to be tested is detachably mounted on the movable sleeve; and a test host, which is connected to the sensor to be tested through a signal line; the sensor to be tested is driven to each test port through the movable sleeve to respectively detect the flammable refrigerants of different set concentrations in each concentration box, and the test host receives the test information of the sensor to be tested and calculates the response time.

[0006] Furthermore, the box group includes three concentration boxes arranged side by side: a first concentration box stores flammable refrigerant with a concentration at the highest value of the sensor concentration range; a second concentration box stores flammable refrigerant with a concentration at an intermediate value of the sensor concentration range; and a third concentration box stores flammable refrigerant with a concentration at the lowest value of the sensor concentration range.

[0007] Furthermore, each of the test ports comprises an upper test port and a lower test port which are arranged relatively to each other up and down, and the support seat is provided with an upper sampling port corresponding to the upper test port and a lower sampling port corresponding to the lower test port.

[0008] Furthermore, the active test unit also includes a support seat for installing the sensor to be tested, the support seat is arranged in the middle of the fixed sleeve, the projection area of ​​the support seat is smaller than the projection area of ​​the fixed sleeve in the axial direction, and sealing partitions are respectively arranged between the two ends of the support seat and the sleeve.

[0009] Furthermore, the support base is provided with a middle partition to separate the support base into an upper test cavity facing the upper sampling port and a lower test cavity facing the lower sampling port, and the sensor to be tested includes a first sensor to be tested arranged in the upper test cavity and a second sensor to be tested arranged in the lower test cavity.

[0010] Furthermore, the test host is independently arranged outside the movable sleeve, the signal line passes through the inside of the movable sleeve, the front end of the signal line passes through the sealed threading hole and is connected to the sensor under test, and the rear end extends out of the movable sleeve and is connected to the test host.

[0011] Furthermore, each test port of the fixed sleeve is provided with a sealing member, and the movable sleeve is slidably and sealingly matched with each of the sealing members.

[0012] Further, the sealing member is a radial sealing ring arranged on the front and rear sides of each test port of the fixed sleeve, and the movable sleeve cooperates with the radial sealing ring in a sliding and sealing manner; or, the sealing member is a circumferential sealing ring arranged on the outer periphery of each test port of the fixed sleeve, and the movable sleeve cooperates with the circumferential sealing ring in a sliding and sealing manner.

[0013] In order to achieve the above-mentioned object, in a second aspect, the utility model provides a method for testing the response time of a flammable refrigerant sensor, using the flammable refrigerant sensor response time testing device for testing, comprising:

[0014] S100. The test box is provided with three concentration boxes arranged side by side, including: a first concentration box, storing the flammable refrigerant with the highest concentration of the sensor concentration range; a second concentration box, storing the flammable refrigerant with the middle concentration of the sensor concentration range; a third concentration box, storing the flammable refrigerant with the lowest concentration of the sensor concentration range;

[0015] S200. Push the movable sleeve to expose the sensor under test to the test port of the third concentration box. The test host collects the concentration change displayed by the sensor under test at the set frequency, and records the time t1 required from exposure to the third concentration box to the concentration value collected by the sensor under test reaching 90% of the concentration set in the concentration box, and continues until the concentration collected by the sensor under test reaches the concentration set in the third concentration box;

[0016] S300. Push the movable sleeve again to expose the sensor under test to the measuring port of the second concentration box, and record the time t2 required from exposure to the second concentration box to the concentration value collected by the sensor under test reaching 90% of the concentration set in the concentration box, and continue until the concentration collected by the sensor under test reaches the concentration set in the second concentration box;

[0017] S400. Push the movable sleeve again to expose the sensor under test to the measuring port of the first concentration box. The time required from the start of exposure to the time when the concentration collected by the sensor under test reaches 90% of the concentration in the first concentration box is recorded as t3. The time continues until the concentration collected by the sensor under test reaches the set concentration in the first concentration box, and the test ends.

[0018] S500. Take the larger of t1, t2 and t3 as the refrigerant sensor concentration response time. Further, the flammable refrigerant sensor response time test method includes:

[0019] S800. Push the movable sleeve, the first sensor under test and the second sensor under test are simultaneously exposed to the measuring port of one of the concentration boxes, and record the time t required from exposure to the concentration box position to the concentration value collected by the first sensor under test and the second sensor under test reaching 90% of the set concentration of the concentration box. 上 and t 下, and continues until the concentration collected by the first test sensor and the second test sensor reaches the concentration set in the second concentration box;

[0020] S900.T 上 and t 下 The smaller value is taken as the response value of the test sensor in this density box.

[0021] The provided testing method and device can be used to test the response time of a refrigeration sensor alone, and can also be used to test the response sensitivity of a refrigerant monitoring system sensor for an air-conditioning refrigeration system. The test results are accurate and the operation process is safe and convenient.

[0022] The technical advantages of the test method and test device for the response time of a flammable refrigerant sensor provided by the utility model are at least reflected in:

[0023] First, by storing flammable refrigerants of different set concentrations in the box group, setting the tested sensor on the movable sleeve, and driving the tested sensor to move in the fixed sleeve through the movable sleeve, the flammable refrigerants of different set concentrations in each concentration box are detected respectively. The test host receives the test information of the tested sensor and calculates the response time, the test result is accurate, and the operation process is safe and convenient.

[0024] Secondly, by setting up a plurality of concentration boxes spaced and arranged mutually, and storing flammable refrigerants of different concentrations in each concentration box, the concentration of each concentration box can be adjusted to realize the test of whether the alarm state of the refrigerant sensor at the set points of high alarm, low alarm, etc. is normal;

[0025] Thirdly, it can be used to test the response time of refrigeration sensors alone, and can also be used to test the response sensitivity of sensors in refrigerant monitoring systems used in air-conditioning refrigeration systems. The test process is simple to operate and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic structural diagram of an embodiment of a provided flammable refrigerant sensor response time testing device;

[0027] Figure 2 A schematic diagram of the structure of the connection between the box group of the provided test device and the fixed sleeve;

[0028] Figure 3 A schematic diagram of the structure of the connection between the provided active test unit and the test host;

[0029] Figure 4 A flowchart of an embodiment of a provided flammable refrigerant sensor response time testing method;

[0030] Figure 5A schematic structural diagram of a front end portion of another embodiment of the provided active test unit;

[0031] Figure 6 The present invention is a flowchart of another embodiment of the provided flammable refrigerant sensor response time testing method.

[0032] Description of the accompanying drawings:

[0033] 1-first concentration box, 2-second concentration box, 3-third concentration box;

[0034] 4-Fix the casing;

[0035] 5-Active sleeve;

[0036] 6-Signal line;

[0037] 7-Sensor under test;

[0038] 81a, 81b, 81c-upper test ports, 82a, 82b, 82c-lower test ports;

[0039] 9- Seal;

[0040] 10- Sealing partition;

[0041] 11- With sealed threading hole;

[0042] 12-support seat;

[0043] 13-middle partition;

[0044] 14-upper sampling port, 15-lower sampling port;

[0045] 16- Test the host. DETAILED DESCRIPTION

[0046] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0047] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, an embodiment of a flammable refrigerant sensor response time testing device provided by the utility model includes a box group, a fixed sleeve 4, a movable test unit and a test host 16.

[0048] The box group is divided into a plurality of concentration boxes 1, 2 and 3 by box walls arranged at intervals in the longitudinal direction, and each of the concentration boxes stores flammable refrigerants of different set concentrations; a fixed sleeve 4 runs through each of the concentration boxes in the longitudinal direction and both ends extend out of the box group, and the fixed sleeve 4 is provided with a through test port at each concentration box; the movable test unit includes a movable sleeve 5 and a sensor to be tested 7, the movable sleeve 5 is slidingly sealed with the fixed sleeve 4, and the sensor to be tested 7 is detachably mounted on the movable sleeve 5; and the test host 16 is connected to the sensor to be tested 7 via a signal line 6.

[0049] During the test, the sensor 7 to be tested is driven to each test port through the movable sleeve 5 to detect the flammable refrigerant of different set concentrations in each concentration box respectively. The test host 16 receives the test information of the sensor 7 to be tested and calculates the response time.

[0050] The utility model provides a test method and a test device for the response time of a flammable refrigerant sensor, which fills the gap in the test method for the response time of a refrigerant sensor in the industry, and provides a test device that can quickly test the response time of a refrigerant sensor. In addition to being used to test the response time of a refrigerant sensor, the device can also adjust the concentration of a concentration box to test whether the alarm state of the refrigerant sensor at a set point such as a high alarm or a low alarm is normal.

[0051] like Figure 1 and Figure 2 As shown, in a preferred embodiment, the box group includes three concentration boxes arranged side by side: the first concentration box 1 stores the flammable refrigerant with the highest concentration of the sensor concentration range; the second concentration box 2 stores the flammable refrigerant with the middle concentration of the sensor concentration range; the third concentration box 3 stores the flammable refrigerant with the lowest concentration of the sensor concentration range. Further, each of the test ports includes an upper test port 81 and a lower test port 82 arranged relatively up and down, and the support seat 12 is provided with an upper sampling port 14 corresponding to the upper test ports 81a, 81b, 81c, and a lower sampling port 15 corresponding to the lower test ports 82a, 82b, 82c.

[0052] Specifically, a test device for the response time of a flammable refrigerant sensor is provided, and the test device includes three concentration boxes with controllable concentrations. The first concentration box 1, the second concentration box 2, and the third concentration box 3 can adjust different refrigerant concentrations according to test needs, wherein the first concentration box 1 and the second concentration box 2 are adjacent to share a connecting wall, and the second concentration box 2 and the third concentration box 3 are adjacent to share a connecting wall, and the fixed sleeve 4 passes through the first concentration box 1, the second concentration box 2, and the third concentration box 3, and the position is fixed, and the movable sleeve 5 is slidably arranged in the fixed sleeve 4, and can move back and forth, and is sealed with the fixed sleeve 4 through the sealing device 9.

[0053] In the above embodiment, a plurality of concentration boxes are provided which are spaced apart and arranged from each other, and flammable refrigerants of different concentrations are stored in each concentration box. By adjusting the concentration of each concentration box, it is possible to test whether the alarm status of the refrigerant sensor at the set points such as high alarm and low alarm is normal.

[0054] like Figure 1 and Figure 3 As shown, the active test unit also includes a support seat 12 for mounting the sensor 7 to be tested, the support seat 12 is arranged in the middle of the fixed sleeve 4, the projection area of ​​the support seat 12 is smaller than the projection area of ​​the fixed sleeve 4 in the axial direction, and sealing partitions 10 are respectively arranged between the two ends of the support seat 12 and the sleeve.

[0055] like Figure 3 As shown, the test host 16 is independently arranged outside the movable sleeve 5, and the signal line 6 passes through the inside of the movable sleeve 5. The front end of the signal line 6 passes through the sealed threading hole 11 and is connected to the sensor 7 under test, and the rear end extends out of the movable sleeve 5 and is connected to the test host 16.

[0056] like Figure 1 , Figure 2 As shown, a sealing member 9 is provided at each test port of the fixed sleeve 4, and the movable sleeve 5 is in sliding and sealing cooperation with each sealing member 9. The sealing member 9 is a radial sealing ring provided at the front and rear sides of each test port of the fixed sleeve 4, and the movable sleeve 5 is in sliding and sealing cooperation with the radial sealing ring; or, the sealing member 9 is a circumferential sealing ring provided at the outer periphery of each test port of the fixed sleeve 4, and the movable sleeve 5 is in sliding and sealing cooperation with the circumferential sealing ring.

[0057] In a specific implementation, the first concentration box 1, the second concentration box 2, and the third concentration box 3 are made of transparent acrylic plate or transparent quartz glass. The fixed sleeve 4 and the fixed sleeve 5 are made of transparent acrylic plate or transparent quartz glass, and the material is consistent with the concentration box. The sealing partition 10 is made of transparent acrylic plate or transparent quartz glass or other corrosion-resistant materials. The material of the support seat 12 is not limited, but it should be corrosion-resistant. The seal 9 is made of rubber sealing material or other suitable sealing material. This device can be used to test the response time of the preparation sensor, and can also be used to detect the response speed of the refrigerant sensor of the refrigerant monitoring system, and can be used to detect or calibrate the measurement of the sensor.

[0058] like Figure 4 As shown, the present invention provides a method for testing the response time of a flammable refrigerant sensor, using the flammable refrigerant sensor response time testing device for testing, comprising:

[0059] S100. The test box is provided with three concentration boxes arranged side by side, including: a first concentration box 1, storing the flammable refrigerant with the highest concentration of the sensor concentration range; a second concentration box 2, storing the flammable refrigerant with the middle concentration of the sensor concentration range; a third concentration box 3, storing the flammable refrigerant with the lowest concentration of the sensor concentration range;

[0060] S200. Push the movable sleeve 5 to expose the sensor 7 to the test ports 81a and 82a of the third concentration box 3. The test host collects the concentration change displayed by the sensor 7 at the set frequency, and records the time t1 required from exposure to the third concentration box 3 to the concentration value collected by the sensor 7 reaching 90% of the concentration set in the concentration box, and continues until the concentration collected by the sensor 7 reaches the concentration set in the third concentration box 3;

[0061] S300. Push the movable sleeve 5 again to expose the sensor 7 to the measuring ports 81b and 82b of the second concentration box 2, and record the time t2 required from exposure to the second concentration box 2 to the concentration value collected by the sensor 7 reaching 90% of the concentration set in the concentration box, and continue until the concentration collected by the sensor 7 reaches the concentration set in the second concentration box 2;

[0062] S400. Push the movable sleeve 5 again to expose the sensor 7 to the measuring ports 81c and 82c of the first concentration box 1. The time from the start of exposure to the time when the concentration collected by the sensor 7 reaches 90% of the first concentration box 1 is recorded as t3. The time continues until the concentration collected by the sensor 7 reaches the set concentration of the first concentration box 1, and the test is terminated.

[0063] S500. Take the larger one among t1, t2 and t3 as the refrigerant sensor concentration response time.

[0064] like Figure 5 As shown, the support base 12 is provided with a middle partition 13 to separate the support base 12 into an upper test cavity facing the upper sampling port 14 and a lower test cavity facing the lower sampling port 15, and the sensor 7 to be tested includes a first sensor to be tested 7 arranged in the upper test cavity and a second sensor to be tested 7 arranged in the lower test cavity.

[0065] like Figure 6 As shown, the flammable refrigerant sensor response time testing method also includes:

[0066] S800. Push the movable sleeve 5, the first sensor 7 and the second sensor 7 are simultaneously exposed to the measuring port of one of the concentration boxes, and record the time t required from exposure to the concentration box position to the concentration value collected by the first sensor and the second sensor reaching 90% of the set concentration of the concentration box. 上 and t 下 , and continue until the concentration collected by the first test sensor and the second test sensor reaches the set concentration of the second concentration box 2;

[0067] S900.T 上 and t 下 The smaller value is taken as the response value of the test sensor to the flammable refrigerant concentration contained in the density box.

[0068] In the above embodiment, a middle partition is provided on the support base to separate the support base into an upward test chamber and a lower test chamber, a first sensor to be tested is provided in the upper test chamber, and a second sensor to be tested is provided in the lower test chamber. During the test, the first sensor to be tested and the second sensor to be tested are simultaneously exposed to the measuring port of one of the concentration boxes, and the time t required from exposure to the concentration box position to the concentration value collected by the first sensor and the second sensor to reach 90% of the set concentration of the concentration box is recorded. 上 and t 下 . Take t 上 and t 下 The smaller value of is used as the response value of the test sensor to the concentration of the flammable refrigerant contained in the density box. This can improve the accuracy of the test.

[0069] An upper sampling port 14 and a lower sampling port 15 are provided near the front section of the movable sleeve 5. A sealing partition 10 is used to separate the upper opening 14 and the lower opening 15 from the movable sleeve 5. The sealing partition 10 has a sealed threading hole 11, and a support seat 12 is provided in the opening. The sensor 7 to be measured is placed on the support seat 12, and the signal line 6 of the sensor 7 to be measured passes through the sealed threading hole 11.

[0070] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments to make the technical aspects of the present invention more specific and clear.

[0071] like Figure 1 As shown, the first concentration box 1, the second concentration box 2, and the third concentration box 3 are made of acrylic plates or quartz glass, and their function is to provide gases of different concentrations for detection; the fixed sleeve 4 runs through the first concentration box 1, the second concentration box 2, and the third concentration box 3, and a test port is provided in each concentration box, the fixed sleeve 4 has an upper test port 81c and a lower test port 82c at the position of the first concentration box 1, an upper test port 81b and a lower test port 81b at the position of the second concentration box 2, and an upper test port 81a and a lower test port 82a at the position of the third concentration box 3, and the movable sleeve 5 is movably arranged, and has an upper sampling port 14 and a lower sampling port 15 thereon, and the movable sleeve 5 is moved by pushing or pulling so that the sampling port 14 and the sampling port 15 are aligned with the upper test ports 81a, 81b of the fixed sleeve 4. , 81c, and the lower test ports 82a, 82b, and 82c overlap, so as to realize the detection of concentrations in different concentration boxes. For example, when the sampling port 14 and the sampling port 15 of the movable sleeve 5 are pushed to overlap with the upper test port 81a and the lower test port 81b at the position of the third concentration box 3, the exposure of the sensor 7 to be tested in the third concentration box 3 is realized; the movable sleeve 5 is pushed again to make its upper sampling port 14 and the lower sampling port 15 overlap with the upper test port 81b and the lower test port 82b at the position of the second concentration box 2, so as to realize the exposure of the sensor 7 to be tested in the second concentration box; the movable sleeve 5 is pushed again to make its upper sampling port 14 and the lower sampling port 15 overlap with the upper test port 81c and the lower test port 82c at the position of the first concentration box 1, so as to realize the exposure of the sensor 7 to be tested in the first concentration box.

[0072] By pulling the sleeve 5 to the right in the opposite direction, the sensor 7 under test in the first concentration box 1, the second concentration box 2, and the third concentration box 3 can be exposed and tested again. The time of each push or pull is controlled within 2-5s, and the push and pull action can be achieved by a mechanical arm or manually.

[0073] Inside the sleeve 4 , sealing is achieved between the sealing device 9 and the fixed sleeve 4 , ensuring that the concentration in the concentration box will not enter the sleeve 4 .

[0074] The test method for the response time of the flammable refrigerant sensor is as follows:

[0075] Set the first concentration box 1, the second concentration box 2, and the third concentration box 3 at the highest value of the flammable refrigerant sensor concentration range, the middle position of the sensor concentration range, and the lowest value of the sensor concentration range, push the movable sleeve 5 to expose the sensor 7 to the position of the third concentration box 3, collect the concentration change displayed by the sensor to be tested at a sampling frequency of no more than 1s, and record the time t1 required from exposure to the third concentration box 3 to the concentration value collected by the sensor to reach 90% of the set concentration of the concentration box. Continue until the concentration collected by the sensor to be tested reaches the concentration of the concentration box, then push the movable sleeve 5 to expose the sensor to be tested. Sensor 7 is exposed in the second concentration box, and the time t2 required from exposure to the second concentration box 2 to the concentration value collected by the measured sensor 7 reaching 90% of the set concentration in the concentration box is recorded. This continues until the concentration collected by the measured sensor reaches the concentration in the concentration box. Then, the movable sleeve 5 is pushed again to expose the measured sensor to the first concentration box 1. The time required from the exposure to the concentration collected by the measured sensor reaching 90% of the concentration box is recorded as t3. This continues until the concentration collected by the measured sensor reaches the concentration in the concentration box. The test is terminated, and the larger of t1, t2 and t3 is taken as the concentration response time of the refrigerant sensor.

[0076] The above embodiment, taking a three-concentration test chamber as an example, can realize the design of a double-concentration, three-concentration or multi-concentration test chamber, and the number of test chambers can be increased or decreased according to actual needs. Without opening the concentration chamber, the sensor can be quickly switched between different concentrations, which can be used to test the response time of the sensor and to confirm the alarm setting value of the sensor monitoring system. It can be used not only in the detection field, but also in the measurement and calibration of the sensor; the test device has a simple structure and is easy to operate, and can be used in different fields where flammable refrigerant sensors are used, such as refrigeration, air conditioning heat pumps, etc.

[0077] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A flammable refrigerant sensor response time test device, characterized in that: include: A box group is divided into a plurality of concentration boxes by box walls arranged at intervals in the longitudinal direction, each of the concentration boxes stores a flammable refrigerant of a different set concentration; A fixed sleeve (4) vertically penetrates each of the concentration boxes and has two ends extending outside the box group, and each of the fixed sleeves (4) is provided with a through test port located at each concentration box; A movable test unit, comprising a movable sleeve (5) and a sensor to be tested (7), wherein the movable sleeve (5) is slidably sealed with the fixed sleeve (4), and the sensor to be tested (7) is detachably mounted on the movable sleeve (5); and The test host (16) is connected to the sensor (7) under test via a signal line (6); and drives the sensor (7) under test to each test port via the movable sleeve (5); The box group comprises three concentration boxes arranged side by side: a first concentration box (1) for storing flammable refrigerant with a concentration of the highest value in the concentration range of the sensor; a second concentration box (2) for storing flammable refrigerant with a concentration of the middle value in the concentration range of the sensor; and a third concentration box (3) for storing flammable refrigerant with a concentration of the lowest value in the concentration range of the sensor. The test host (16) is independently arranged outside the movable sleeve (5), and the signal line (6) passes through the inside of the movable sleeve (5). The front end of the signal line (6) passes through the sealed threading hole (11) and is connected to the sensor (7) under test, and the rear end extends out of the movable sleeve (5) and is connected to the test host (16).

2. The flammable refrigerant sensor response time testing device according to claim 1, characterized in that: The movable test unit further comprises a support seat (12) for mounting the sensor (7) to be tested, the support seat (12) being arranged in the middle of the fixed sleeve (4), the projection area of ​​the support seat (12) being smaller than the projection area of ​​the fixed sleeve (4) in the axial direction, and sealing baffles (10) being arranged between the two ends of the support seat (12) and the sleeve respectively.

3. The flammable refrigerant sensor response time testing device according to claim 2, characterized in that: Each of the test ports comprises an upper test port (81a, 81b, 81c) and a lower test port (82a, 82b, 82c) arranged relatively to each other in the upper and lower directions, and the support seat (12) is provided with an upper sampling port (14) corresponding to the upper test port (81a, 81b, 81c) and a lower sampling port (15) corresponding to the lower test port (82a, 82b, 82c).

4. The flammable refrigerant sensor response time testing device according to claim 2, characterized in that: The support base (12) is provided with a middle partition (13) to divide the support base (12) into an upper test chamber facing the upper sampling port (14) and a lower test chamber facing the lower sampling port (15); the sensor to be tested (7) comprises a first sensor to be tested (7) arranged in the upper test chamber and a second sensor to be tested (7) arranged in the lower test chamber.

5. The flammable refrigerant sensor response time testing device according to claim 4, characterized in that: A sealing member (9) is provided at each test port of the fixed sleeve (4), and the movable sleeve (5) is in sliding sealing cooperation with each of the sealing members (9).

6. The flammable refrigerant sensor response time testing device according to claim 5, characterized in that: The sealing member (9) is a radial sealing ring provided at the front and rear sides of each test port of the fixed sleeve (4), and the movable sleeve (5) cooperates with the radial sealing ring in a sliding and sealing manner; or, the sealing member (9) is a circumferential sealing ring provided at the outer periphery of each test port of the fixed sleeve (4), and the movable sleeve (5) cooperates with the circumferential sealing ring in a sliding and sealing manner.

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