A combustible gas detector kitchen environment simulation testing device

Abstract

The application relates to a combustible gas detector kitchen environment simulation test device and relates to the field of detector test devices. The device comprises a closed box, one side wall of the box is a closable door body, a heating unit and a mounting rack are arranged in the box, the mounting rack is used for mounting a combustible gas detector, a temperature sensor, a humidity sensor and a probe of an oil fume concentration monitor, a tray for containing edible oil and / or water is arranged above the heating unit, a ventilation system is arranged on the top or the side wall of the box, the ventilation system has an internal circulation mode for internally circulating the gas in the box and an exhaust mode for discharging the gas in the box to the outside. The application can highly simulate a real kitchen environment, quantitatively control and couple test various environment factors and improve the test accuracy of the combustible gas detector.

Description

Technical Field

[0001] This application relates to the field of detector testing devices, and in particular to a kitchen environment simulation testing device for a combustible gas detector. Background Technology

[0002] Combustible gas detectors are crucial safety devices in homes and industrial settings, used to warn of gas leaks and prevent fires and explosions. The kitchen is the primary installation location for household combustible gas detectors, but it also presents the harshest environment, with persistent high temperatures, high humidity, and oil fumes. These factors can cause sensor drift, poisoning, blockage, or circuit malfunctions, leading to false alarms or missed alarms and rendering the detector ineffective.

[0003] Currently, testing of combustible gas detectors is typically conducted in idealized laboratory environments, usually focusing only on their basic alarm functions, such as testing alarm thresholds with standard gases. There is a lack of methods to assess their long-term reliability and anti-interference capabilities under real, complex interference environments. Existing technologies cannot simulate the real-world situation where multiple factors, including oil fumes, temperature, and humidity, coexist and interact, leading to discrepancies between test results and actual performance.

[0004] Therefore, there is an urgent need for a specialized device that can highly simulate the real kitchen environment and quantitatively control and couple various environmental factors to scientifically and objectively test the environmental adaptability and long-term stability of combustible gas detectors. Utility Model Content

[0005] In order to highly simulate the real kitchen environment and to quantitatively control and couple various environmental factors, this application provides a kitchen environment simulation test device for combustible gas detectors.

[0006] The combustible gas detector kitchen environment simulation testing device provided in this application adopts the following technical solution: A kitchen environment simulation testing device for combustible gas detectors includes a closed enclosure, one side wall of which is an openable door, characterized in that: The box is equipped with a heating unit and a mounting frame. The mounting frame is used to install the probes of a combustible gas detector, a temperature sensor, a humidity sensor, and an oil fume concentration monitor. A tray for receiving cooking oil and / or water is provided above the heating unit. The top or side wall of the enclosure is equipped with a ventilation system, which has an internal circulation mode that circulates the gas inside the enclosure and an exhaust mode that vents the gas inside the enclosure outward.

[0007] By adopting the above technical solutions, a closed enclosure is set up to simulate a kitchen environment, which can effectively isolate external interference and improve the accuracy of testing. The heating unit and tray work together to simulate the heat, fumes, and moisture generated during kitchen cooking. The mounting bracket facilitates the installation of various sensor probes, making it easy to comprehensively monitor parameters such as temperature, humidity, and fume concentration in the simulated environment. The ventilation system's internal circulation mode and exhaust mode can flexibly adjust the gas state inside the enclosure. The internal circulation mode is used to improve the uniformity of the enclosure environment, while the exhaust mode is used to quickly exhaust the original air inside the enclosure and replace it with standard air, which helps to improve the accuracy of various measurements.

[0008] Optionally, the ventilation system includes an air outlet duct fixed to the housing, one end of which is connected to the interior of the housing and the other end is an air outlet. An inner cylinder is fixed inside the air outlet duct. One end of the inner cylinder is closed and the other end is open. The open end of the inner cylinder extends into the interior of the housing, and the outer wall of the open end of the inner cylinder is fixedly connected to the inner wall of the air outlet duct to seal the gap between the inner cylinder and the air outlet duct. The open end of the inner cylinder is fixedly connected to one of the circulating fans. A through hole is opened on the peripheral wall of the inner cylinder, and an air guide port communicating with the interior of the housing is opened on the side wall of the air outlet duct. The air outlet duct is also fitted with an axially movable air guide duct. By moving the air guide duct, the through hole can be selectively connected to the air guide port to achieve internal circulation, or the through hole can be connected to the air outlet to achieve exhaust.

[0009] By adopting the above technical solution and controlling the axial movement of the air guide tube, the switching between internal circulation mode and exhaust mode can be realized. The internal circulation mode ensures the uniformity of the environment inside the box, while the exhaust mode quickly discharges the original air inside the box and replaces it with standard air.

[0010] Optionally, one end of the air guide duct is provided with an annular plate for abutting against the closed end of the inner cylinder, and a window is opened on the peripheral wall of the air guide duct; When the air guide tube moves to the first position, the ring plate abuts against the closed end of the inner cylinder to close the air outlet. At the same time, the window is aligned with and connected to the air guide, so that the through hole is aligned with the air guide to form an internal circulation air duct. When the air guide tube moves to the second position, the ring plate moves away from the closed end of the inner cylinder to open the air outlet. At the same time, the window is offset from the air guide port and the air guide port is closed, so that the through hole is connected to the air outlet to form an exhaust channel.

[0011] By adopting the above technical solution, when the air duct is in the first position, the air outlet can be effectively sealed and an internal circulation air duct can be formed to ensure that the gas inside the box is fully circulated; when it is in the second position, the air outlet is opened and the air duct is sealed to form an external exhaust air duct to discharge the gas inside the box, which facilitates the switching between the internal circulation mode and the exhaust mode.

[0012] Optionally, an adjusting seat is rotatably connected to the outer end of the air outlet, the outer wall of the air guide tube is provided with an external thread, and the inner side of the adjusting seat is provided with a matching internal thread; The inner wall of the air outlet duct is provided with a guide groove, and the outer wall of the air outlet duct is provided with a guide block that slides with the guide groove, so that the air outlet duct can be driven to move axially when the adjustment seat is rotated.

[0013] By adopting the above technical solution, the engagement between the adjusting seat at the outer end of the air outlet duct and the threaded connection on the outer wall of the air guide duct, as well as the sliding engagement between the limiting guide groove on the inner wall of the air outlet duct and the guide block on the outer wall of the air guide duct, enables the function of driving the axial movement of the air guide duct by rotating the adjusting seat. This structure makes the movement of the air guide duct more stable and precise, facilitating operators to accurately control the mode switching of the ventilation system, and improving the operational convenience and reliability of the entire device.

[0014] Optionally, the housing is also provided with an air inlet, and an openable baffle is hinged to the air inlet.

[0015] By adopting the above technical solution, the air inlet setting can ensure that fresh air enters the chamber and maintain a certain flow of gas inside the chamber, thus more realistically simulating the kitchen ventilation environment; the hinged, openable baffle can flexibly control the opening and closing of the air inlet according to the test requirements. For example, the baffle can be closed when simulating a closed kitchen environment and internal circulation mode, and opened when quickly discharging the original air inside the chamber and replacing it with standard air.

[0016] Optionally, a transparent observation window is embedded in the door.

[0017] By adopting the above technical solution, a transparent observation window is embedded in the door, which allows operators to observe the situation inside the chamber at any time during the test, such as the display status of the sensors, changes in the cooking oil and water in the tray, etc., without having to open the door, thus avoiding changes in the internal environment of the chamber caused by opening the door, ensuring the continuity and accuracy of the test, and also improving the safety of the operation.

[0018] Optionally, at least one push block is elastically connected to the inner wall of the box by a spring. When the door is closed, the inner side wall of the door presses against the push block, so that the push block clamps and fixes the tray placed in the box.

[0019] By adopting the above technical solution, the push block connected by springs on the inner wall of the chamber can automatically clamp and fix the tray when the door is closed, preventing the tray from moving during the test due to gas flow or equipment vibration inside the chamber. This ensures the stability of the position of cooking oil and water on the tray, thereby ensuring the stability of the simulated environment and improving the reliability of the test results. The elastic design of the springs also allows the push block to adapt to trays of different sizes, giving it a certain degree of versatility.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. The enclosed enclosure simulates a kitchen environment, effectively isolating external interference and improving test accuracy; the heating unit and tray work together to simulate the heat, fumes, and moisture generated during kitchen cooking; the mounting bracket facilitates the installation of various sensor probes, enabling comprehensive monitoring of parameters such as temperature, humidity, and fume concentration in the simulated environment, thereby improving the test accuracy of the combustible gas detector. 2. During the sequential testing of the combustible gas detector, the internal circulation mode is activated during each test to improve the uniformity of the chamber environment, while the exhaust mode is used to quickly exhaust the original air in the chamber and quickly replace it with standard air after each test, reducing mutual interference between tests and reducing the interval time between adjacent tests. 3. The push block, connected by a spring, can automatically clamp and fix the tray when the door is closed, preventing the tray from moving during the test due to gas flow or equipment vibration inside the chamber. This ensures the stability of the position of cooking oil and water on the tray, thereby ensuring the stability of the simulated environment and improving the reliability of the test results. The elastic design of the spring also allows the push block to adapt to trays of different sizes, giving it a certain degree of versatility. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0022] Figure 2 This is a schematic diagram illustrating the structure of the ventilation system in the embodiments of this application.

[0023] Figure 3 This is a schematic diagram illustrating the structure of the mounting plate in an embodiment of this application.

[0024] Figure 4 This is a cross-sectional view used in the embodiments of this application to illustrate the air duct, inner cylinder, and air guide duct.

[0025] Figure 5 yes Figure 4 An enlarged schematic diagram of part A in the middle.

[0026] Figure 6 This is a cross-sectional view of the air outlet duct in the internal circulation mode, as shown in the embodiments of this application.

[0027] Figure 7 This is an exploded view of the ventilation duct, inner cylinder, and air guide duct used in the embodiments of this application.

[0028] Explanation of reference numerals in the attached drawings: 10. Housing; 11. Door; 12. Observation window; 13. Mounting plate; 14. Heating unit; 15. Tray; 16. Spring; 17. Push block; 20. Circulating fan; 21. Air outlet; 22. Air inlet; 23. Baffle; 30. Air outlet duct; 31. Adjustment seat; 32. Air guide; 33. Inner cylinder; 34. Through hole; 35. Connecting plate; 36. Air guide duct; 37. Ring plate; 38. Window; 40. Guide block; 41. Guide groove. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0030] This application discloses a kitchen environment simulation testing device for a combustible gas detector. For example... Figure 1 and Figure 2 The combustible gas detector kitchen environment simulation test device includes a closed box 10. One side wall of the box 10 is set as an openable door 11. A transparent observation window 12 is embedded in the door 11, which allows the operator to observe the internal situation without opening the box 10.

[0031] like Figure 2 and Figure 3 The cabinet 10 contains a heating unit 14 and a mounting plate 13. The heating unit 14 is installed on the inner bottom wall of the cabinet 10. Multiple trays 15 can be placed above the heating unit 14 inside the cabinet 10. The trays 15 can be used to hold cooking oil or water. When the heating unit 14 is activated, it heats the trays 15, generating oil fumes or water vapor. The mounting plate 13 is located on the inner top wall of the cabinet 10. The mounting plate 13 is used to fix the probes of the combustible gas detector, temperature sensor, humidity sensor, and oil fume concentration monitor, to simulate the kitchen environment and monitor relevant parameters in real time.

[0032] like Figure 4 At least one push block 17 is elastically connected to the side wall of the box 10 by a spring 16. When the door 11 is closed, the inner side wall of the door 11 pushes the tray 15 against the push block 17. Under the action of the spring 16, the push block 17 clamps and fixes the tray 15 placed in the box 10, ensuring the stability of the tray 15 during the test.

[0033] like Figure 3 and Figure 4 The top or side wall of the chamber 10 is equipped with a ventilation system, which has an internal circulation mode and an exhaust mode to meet different testing needs.

[0034] The ventilation system includes multiple circulating fans 20 installed on the inner wall of the housing 10. The housing 10 is also provided with an air outlet 21 and an air inlet 22 for ventilation and exhaust. An openable baffle 23 is hinged at the air inlet 22 to control the entry of standard external air into the housing 10.

[0035] like Figure 5 , Figure 6 as well as Figure 7 An air outlet duct 30 is installed inside the air outlet 21 of the housing 10. The air outlet duct 30 is cylindrical, with one end extending into the housing 10 and communicating with the interior of the housing 10, and the other end located outside the housing 10 as the air outlet 21. An inner cylinder 33 is coaxially arranged inside the air outlet duct 30. One end of the inner cylinder 33 is closed, and the other end is open, extending into the interior of the housing 10. An annular connecting plate 35 is fixedly connected to the outer wall of the open end, and the connecting plate 35 is fixedly connected to the inner wall of the air outlet duct 30, sealing the gap between the inner cylinder 33 and the air outlet duct 30. The open end of the inner cylinder 33 is fixedly connected to one of the circulating fans 20. A through hole 34 is opened on the peripheral wall of the inner cylinder 33, and an air guide vent 32 communicating with the interior of the housing 10 is opened on the side wall of the air outlet duct 30 located inside the housing 10. The air outlet duct 30 is also fitted with an axially movable air guide duct 36. By moving the air guide duct 36, the air outlet 21 or the air guide duct 32 can be selectively closed.

[0036] One end of the air guide duct 36 is provided with an annular plate 37 for abutting against the closed end of the inner cylinder 33. A window 38 is opened on the peripheral wall of the air guide duct 36. The air guide duct 36 is provided with a first position and a second position along its own moving direction.

[0037] When the air duct 36 moves to the first position, the ring plate 37 abuts against the closed end of the inner cylinder 33, sealing the air outlet 21. At the same time, the window 38 aligns with and connects to the air duct 32, so that the through hole 34 on the peripheral wall of the inner cylinder 33 aligns with the air duct 32, forming an internal circulation air duct. At this time, the circulating fan 20 works, drawing air from the box 10 into the inner cylinder 33 through the air duct 32, and then blowing it back into the box 10 through the through hole 34, window 38, and air duct 32, realizing internal gas circulation and simulating the relatively closed circulation state of air in the kitchen.

[0038] When the air guide duct 36 moves to the second position, the ring plate 37 moves away from the closed end of the inner cylinder 33, opening the air outlet 21. At the same time, the window 38 is offset from the air guide 32 and the air guide 32 is closed, so that the through hole 34 on the peripheral wall of the inner cylinder 33 is connected to the air outlet 21, forming an external exhaust duct. At this time, the circulating fan 20 works, drawing air from the housing 10 into the inner cylinder 33 through the through hole 34, and then discharging it outside the housing 10 through the air outlet 21, thus realizing the exhaust function and accelerating the air renewal inside the housing 10.

[0039] An adjusting seat 31 is rotatably connected to the outer end of the air outlet duct 30. The outer wall of the air guide duct 36 is provided with external threads, and the inner side of the adjusting seat 31 is provided with matching internal threads. The inner wall of the air outlet duct 30 is provided with a guide groove 41, and the outer wall of the air guide duct 36 is provided with a guide block 40 that slides in cooperation with the guide groove 41. When it is necessary to switch the ventilation mode, the adjusting seat 31 is rotated. Since the guide block 40 slides in the guide groove 41, it restricts the rotation of the air guide duct 36, so that the internal thread of the adjusting seat 31 interacts with the external thread of the air guide duct 36, driving the air guide duct 36 to move axially, thereby realizing the switching between the internal circulation mode and the exhaust mode.

[0040] The testing of combustible gas detectors includes single-factor testing and coupled-factor testing. Single-factor testing includes oil fume testing, humidity testing, and temperature testing; coupled-factor testing involves simultaneously simulating two or three of the above environmental conditions (oil fume, humidity, and temperature). By comparing the changes in alarm activation values ​​of the combustible gas detector before and after undergoing various environmental stresses, the degree of performance degradation and anti-interference capability are quantitatively evaluated.

[0041] During various tests, the gas detector needs to simulate a relatively enclosed kitchen environment. This involves activating the internal circulation mode, starting the circulation fan 20, rotating the adjusting seat 31 to move the air guide 36 to the first position, and closing the baffle 23 to achieve internal air circulation within the chamber 10. This agitation reduces uneven local conditions within the chamber 10. After completing one experiment, the air within the chamber 10 needs to be replaced. This is done by activating the exhaust mode, starting the circulation fan 20, rotating the adjusting seat 31 to move the air guide 36 to the second position, and opening the baffle 23 to quickly replace the air within the chamber 10 with standard air, thus reducing the interval between tests.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A kitchen environment simulation testing device for a combustible gas detector, comprising a closed housing (10), wherein one side wall of the housing (10) is an openable door (11), characterized in that: The housing (10) is equipped with a heating unit (14) and a mounting bracket. The mounting bracket is used to install and enhance the probes of the combustible gas detector, temperature sensor, humidity sensor and oil fume concentration monitor. A tray (15) for receiving cooking oil and / or water is provided above the heating unit (14). The top or side wall of the enclosure (10) is provided with a ventilation system, which has an internal circulation mode that circulates the gas inside the enclosure (10) and an exhaust mode that discharges the gas inside the enclosure (10) to the outside.

2. The kitchen environment simulation test device for a combustible gas detector according to claim 1, characterized in that: The ventilation system includes an air outlet duct (30) fixed to the housing (10) and multiple circulating fans (20). One end of the air outlet duct (30) is connected to the interior of the housing (10), and the other end is an air outlet (21). An inner cylinder (33) is fixed inside the air outlet duct (30). One end of the inner cylinder (33) is closed and the other end is open. The open end of the inner cylinder (33) extends into the box body (10), and the outer wall of the open end of the inner cylinder (33) is fixedly connected to the inner wall of the air outlet duct (30) to close the gap between the inner cylinder (33) and the air outlet duct (30). The open end of the inner cylinder (33) is fixedly connected to one of the circulating fans (20). A through hole (34) is opened on the peripheral wall of the inner cylinder (33), and an air guide port (32) communicating with the inside of the box body (10) is opened on the side wall of the air outlet duct (30). The air outlet duct (30) is also fitted with an axially movable air guide duct (36). By moving the air guide duct (36), the through hole (34) can be selectively connected to the air guide port (32) to achieve internal circulation, or the through hole (34) can be connected to the air outlet (21) to achieve exhaust.

3. The kitchen environment simulation test device for a combustible gas detector according to claim 2, characterized in that: One end of the air guide tube (36) is provided with an annular plate (37) for abutting against the closed end of the inner cylinder (33), and a window (38) is opened on the peripheral wall of the air guide tube (36). When the air guide tube (36) moves to the first position, the ring plate (37) abuts against the closed end of the inner cylinder (33) to close the air outlet (21). At the same time, the window (38) is aligned with and connected to the air guide (32), so that the through hole (34) is aligned with the air guide (32) to form an internal circulation air duct. When the air guide tube (36) moves to the second position, the ring plate (37) moves away from the closed end of the inner cylinder (33) to open the air outlet (21). At the same time, the window (38) is offset from the air guide (32) and the air guide (32) is closed, so that the through hole (34) is connected to the air outlet (21) to form an exhaust channel.

4. The kitchen environment simulation test device for a combustible gas detector according to claim 3, characterized in that: The outer end of the air outlet (30) is rotatably connected to an adjustment seat (31), the outer wall of the air guide (36) is provided with an external thread, and the inner side of the adjustment seat (31) is provided with a matching internal thread; The inner wall of the air outlet duct (30) is provided with a guide groove (41), and the outer wall of the air guide duct (36) is provided with a guide block (40) that slides with the guide groove (41), so that the air guide duct (36) can be driven to move axially when the adjustment seat (31) is rotated.

5. The kitchen environment simulation test device for a combustible gas detector according to claim 2, characterized in that: The housing (10) is also provided with an air inlet (22), and an openable baffle (23) is hinged to the air inlet (22).

6. The kitchen environment simulation test device for a combustible gas detector according to claim 1, characterized in that: A transparent observation window (12) is embedded in the door body (11).

7. The kitchen environment simulation test device for combustible gas detectors according to claim 1, characterized in that: At least one push block (17) is elastically connected to the inner wall of the box (10) by a spring (16). When the door (11) is closed, the inner wall of the door (11) presses the push block (17) so that the push block (17) clamps and fixes the tray (15) placed in the box (10).

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