Electrical safety testing device for equipment using combustible refrigerant
By designing an electrical safety test device for the explosion-proof warehouse main body and related components, the problem of the inability to accurately evaluate the electrical safety of combustible refrigerant equipment in the prior art is solved, and a significant improvement in safety and reliability has been achieved, and a detailed test evaluation and improvement basis is provided.
Patent Information
- Application Number
- CN202422220738.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-11
AI Technical Summary
The existing electrical safety testing methods cannot effectively simulate the dangerous situations that combustible refrigerant equipment may encounter during actual use, resulting in the inability to accurately evaluate the electrical safety of the equipment.
An electrical safety testing device including the main body of the explosion-proof chamber, a combustible gas source, a hybrid fan, a combustible gas concentration sensor, an imaging device and a control system was designed. Through the film sealing of the pressure relief port, a control valve, an explosion-proof axial flow fan and other components, the airtightness and pressure relief can be achieved, the gas concentration is dynamically adjusted, the experimental process is monitored remotely, and the experimental intervention is reduced.
Improves the safety and reliability of the test, and can simulate dangerous scenarios of combustible refrigerant leakage under strictly controlled conditions, provide comprehensive assessment, reduce operational risks, and improves the accuracy and repeatability of the test.
Smart Images
Figure CN223139746U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of electrical safety testing equipment, and particularly relates to an electrical safety testing device for equipment using flammable refrigerants. Background Art
[0002] With the gradual enhancement of global environmental protection awareness, the destructive impact of traditional refrigerants on the atmosphere has gradually attracted wide attention. To reduce the damage to the ozone layer and the impact of the greenhouse effect, many countries and regions have gradually promoted the use of natural refrigerants with less environmental impact, such as hydrocarbons (HC), such as propane (R290) and isobutane (R600a). These natural refrigerants have been increasingly used in refrigeration equipment due to their good thermodynamic properties and low global warming potential (GWP). However, hydrocarbon refrigerants are flammable, which brings new challenges to the design, installation, and maintenance of refrigeration systems. Especially in electrical equipment, since electrical components may generate sparks or high temperatures, equipment using flammable refrigerants faces higher explosion and fire risks. Therefore, how to safely apply flammable refrigerants in electrical equipment has become one of the key issues of current research and industry concern.
[0003] Most of the existing electrical safety testing methods are designed for equipment using non-flammable refrigerants, and the possibility of refrigerant leakage and the accumulation of flammable gases inside the equipment are usually not considered during the testing process. In this case, the testing method cannot fully simulate the dangerous situations that the equipment may encounter during actual use, and thus cannot accurately evaluate the electrical safety of the equipment. Summary of the Invention
[0004] This application provides an electrical safety testing device for equipment using flammable refrigerants to achieve the safety testing of equipment using flammable refrigerants. The technical solution of this application is as follows:
[0005] An embodiment of this application provides an electrical safety testing device for equipment using flammable refrigerants, and the device includes:
[0006] An explosion-proof chamber main body, the explosion-proof chamber main body has a first chamber for placing the equipment using flammable refrigerants and a chamber door; one side of the explosion-proof chamber main body has a pressure relief port communicated with the first chamber, and the pressure relief port is sealed by a detachable plastic film; the explosion-proof chamber main body also has a gas source interface communicated with the first chamber;
[0007] A flammable gas source, the flammable gas source is connected to the gas source interface through a first pipeline, and a control valve is arranged on the first pipeline;
[0008] A mixing fan, the mixing fan is installed on the explosion-proof chamber main body;
[0009] A combustible gas concentration sensor, which is installed inside the explosion-proof bin body;
[0010] A camera device, which is installed on the explosion-proof bin body;
[0011] An explosion-proof axial flow fan, which is installed at the lower part of the explosion-proof bin body;
[0012] A control system, which is connected to the control valve, the mixing fan, the explosion-proof axial flow fan, the combustible gas concentration sensor and the camera device.
[0013] In some implementation manners, the explosion-proof bin body is made of high-strength explosion-proof materials, sealing structures are arranged at the joints and seams of the explosion-proof bin body, and a pressing sealing strip and a locking device are arranged on the bin door to ensure the airtightness inside the explosion-proof bin body.
[0014] In some implementation manners, the device further includes an explosion-proof lamp, which is installed at the top of the explosion-proof bin body.
[0015] In some implementation manners, the device includes a plurality of the combustible gas concentration sensors, and the plurality of combustible gas concentration sensors are evenly distributed inside the explosion-proof bin body.
[0016] In some implementation manners, the device includes two mixing fans, and the two mixing fans are respectively installed on the left and right sides of the explosion-proof bin body.
[0017] In some implementation manners, the explosion-proof bin body is a rectangular structure, and the length, width and height of the rectangular structure are 2.7 m, 2.2 m and 2.55 m respectively.
[0018] The technical solution provided by the embodiment of the present application at least brings the following beneficial effects:
[0019] An explosion-proof chamber with a pressure relief port sealed by a film is adopted, which not only ensures good airtightness but also can quickly relieve pressure during an explosion, ensuring the safety of the experiment. The dynamic adjustment of gas concentration can be achieved through a control valve, enabling more accurate simulation of various possible situations of the equipment during actual use. The experimental process is remotely monitored and recorded through a camera device, improving the safety of the experiment and the traceability of data. Manual intervention is reduced, operation risks are lowered, and the repeatability and accuracy of the test process are improved. It can simulate the dangerous scenario of combustible refrigerant leakage under strictly controlled conditions and comprehensively evaluate the electrical safety of the equipment. Key factors such as safety pressure relief, gas concentration monitoring, and gas mixing uniformity are considered, which can significantly improve the safety and reliability of the test and provide an important reference basis for the design improvement of related equipment.
[0020] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit this application. Brief Description of the Drawings
[0021] The drawings herein are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application, and do not constitute an improper limitation of this application.
[0022] Figure 1 It is a schematic structural diagram of an electrical safety test device for equipment using combustible refrigerants shown according to an exemplary embodiment.
[0023] In the figure:
[0024] 1 - explosion-proof chamber body, 2 - explosion-proof lamp, 3 - control system, 4 - combustible gas concentration sensor, 5 - camera device, 6 - mixing fan, 7 - control valve, 8 - explosion-proof axial flow fan. Detailed Description of the Embodiment
[0025] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other.
[0026] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "a plurality" is two or more.
[0027] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood through specific circumstances.
[0028] The present application will be described in detail below with reference to the drawings and in combination with embodiments.
[0029] Figure 1 is a schematic structural diagram of an electrical safety testing device for a device using a flammable refrigerant shown according to an exemplary embodiment. Referring to Figure 1 , the electrical safety testing device for a device using a flammable refrigerant may include: an explosion-proof chamber main body 1, a flammable gas gas source, a mixing fan 6, an explosion-proof axial flow fan 8, a flammable gas concentration sensor 4, a camera device 5, and a control system 3.
[0030] Among them, the explosion-proof chamber main body 1 has a first chamber for placing the device using the flammable refrigerant and a chamber door, and the device to be tested is accommodated through the first chamber.
[0031] One side of the explosion-proof chamber main body 1 has a pressure relief port communicating with the first chamber. The pressure relief port is sealed by a detachable plastic film and is used for explosion pressure relief. The overall design of the explosion-proof chamber main body 1 can maintain good airtightness. Combined with the setting of the pressure relief port, it realizes the effective combination of airtightness and explosion pressure relief, ensuring that under normal test conditions, the pressure relief port will not cause gas leakage and maintaining the airtightness in the chamber. When an explosion or excessive pressure occurs, the plastic film can quickly rupture to release pressure, thus realizing both ensuring the airtightness of the explosion-proof chamber main body 1 and quickly relieving pressure in case of an explosion, thereby reducing the accident risk and ensuring safety.
[0032] The explosion-proof chamber main body 1 also has a gas source interface communicating with the first chamber. The combustible gas source is connected to the gas source interface through the first pipeline, and a control valve 7 is arranged on the first pipeline; the combustible gas source is used to provide combustible gas to simulate possible leakage scenarios; the control valve 7 is used to control the gas supply state of the gas source and is connected to the control system 3, and can realize dynamically adjustable gas concentration control. Optionally, the control valve 7 is an electromagnetic valve.
[0033] The mixing fan 6 is installed on the upper part of the explosion-proof chamber main body 1 and is used to accelerate the mixing of the gas inside the explosion-proof chamber main body 1, ensure uniform gas distribution, and improve the reliability of the test results.
[0034] The combustible gas concentration sensor 4 is installed inside the explosion-proof chamber main body 1 and is used to monitor the combustible gas concentration inside the explosion-proof chamber main body 1 in real time.
[0035] The imaging device 5 is installed on the explosion-proof chamber main body 1 and is used to record the experimental process and support remote monitoring, which is convenient for data analysis and accident traceability. Optionally, the imaging device 5 is a camera.
[0036] The explosion-proof axial flow fan 8 is installed on the lower part of the explosion-proof chamber main body 1.
[0037] The control system 3 is connected to the control valve 7, the mixing fan 6, the explosion-proof axial flow fan 8, the combustible gas concentration sensor 4 and the imaging device 5.
[0038] Thus, the concentration of the combustible gas can be dynamically adjusted through the control system 3, and the operation of the device under test can be controlled, and various operations such as starting and stopping various fans can be performed, with automatic and intelligent control functions, reducing human operation errors; the control system 3 includes a wireless communication module, and can communicate with the wireless communication module through a remote control to realize remote control of the test.
[0039] The electrical safety testing device for equipment using combustible refrigerants according to the embodiments of the present application adopts an explosion-proof chamber including a pressure relief port sealed by a thin film, which not only ensures good airtightness but also can quickly relieve pressure in case of an explosion, ensuring the safety of the experiment. The dynamic adjustment of the gas concentration can be achieved through a control valve, enabling more accurate simulation of various possible situations during the actual use of the equipment. The experiment process is remotely monitored and recorded through a camera device, improving the safety of the experiment and the traceability of data. Manual intervention is reduced, the operation risk is lowered, and the repeatability and accuracy of the testing process are improved. It can simulate the dangerous scenarios of combustible refrigerant leakage under strictly controlled conditions and comprehensively evaluate the electrical safety of the equipment. Considering key factors such as safety pressure relief, gas concentration monitoring, and gas mixing uniformity, it can significantly improve the safety and reliability of the testing, and at the same time provide an important reference basis for the design improvement of related equipment.
[0040] In some embodiments, the explosion-proof chamber body 1 is made of high-strength explosion-proof material. Sealing structures are provided at the joints and seams of the explosion-proof chamber body 1, and a pressing sealing strip and a locking device are provided on the chamber door to ensure the airtightness inside the explosion-proof chamber body 1.
[0041] Thus, the explosion-proof chamber body is made of high-strength explosion-proof material, and its structure is precisely designed and manufactured to ensure the airtightness of each connection part and seam. Through strict material selection and processing technology, any gas leakage is prevented, and the overall sealing performance is improved. The entrance or chamber door of the explosion-proof chamber body 1 adopts an efficient sealing design, usually using a multi-layer sealing structure and high-pressure-resistant sealing material to ensure that there is no air leakage after the chamber door is closed. The sealing device of the chamber door includes a locking device and a pressing sealing strip to further enhance the sealing effect.
[0042] It should also be noted that valves with good sealing performance (such as solenoid valves) are provided for both the combustible gas gas source and the fan pipeline. These channels remain closed in the non-working state to ensure that the gas in the chamber does not leak through the pipeline. The gas state inside the explosion-proof chamber is monitored in real time through multiple combustible gas concentration sensors inside the explosion-proof chamber. Once an abnormal change in the gas concentration is detected, the system can be automatically adjusted to ensure that the airtightness is maintained within a safe range. Through the above structural settings, good airtightness of the explosion-proof chamber body is achieved.
[0043] It should be noted that the explosion-proof axial flow fan 8 is mainly applied in the following scenarios: (1) Gas discharge and ventilation after the experiment: After the experiment, in order to discharge the combustible gas inside the main body of the explosion-proof chamber and ensure safety, the explosion-proof axial flow fan 8 will be started to discharge the residual combustible gas in the chamber and conduct sufficient ventilation. This can ensure that during operations or equipment maintenance in the chamber, safety hazards caused by residual gas are avoided. (2) Forced ventilation in case of emergency: If an abnormal situation occurs during the experiment, such as too high gas concentration or equipment failure, the explosion-proof axial flow fan 8 can be started as an emergency device to quickly reduce the concentration of combustible gas in the chamber, ensure that the environment returns to a safe state, and prevent explosion or fire. (3) Gas removal in the experimental preparation stage: In some experiments, it may be necessary to ensure that the air inside the main body 1 of the explosion-proof chamber is pure, without residual combustible gas or other impurities before the experiment. In this case, the explosion-proof axial flow fan 8 can be used for pre-ventilation to remove the air in the chamber to ensure the gas purity of the experimental environment.
[0044] In some embodiments, the device further includes an explosion-proof lamp 2, and the explosion-proof lamp 2 is installed on the top of the explosion-proof chamber main body 1.
[0045] Thus, through the explosion-proof lamp 2 providing illumination, it is ensured that the test personnel can observe the experimental process in a safe environment.
[0046] In some embodiments, the device includes a plurality of the combustible gas concentration sensors 4, and the plurality of the combustible gas concentration sensors 4 are evenly distributed inside the explosion-proof chamber main body 1.
[0047] Thus, through the plurality of combustible gas concentration sensors 4 distributed at different positions, the comprehensiveness and accuracy of gas concentration monitoring are ensured.
[0048] In some embodiments, the device includes two of the mixing fans 6, and the two mixing fans 6 are respectively installed on the left and right sides of the explosion-proof chamber main body 1.
[0049] In some embodiments, the explosion-proof chamber main body 1 is of a rectangular structure, and the dimensions of the explosion-proof chamber main body 1 can be any dimensions that can completely accommodate the device to be tested. Preferably, the length, width, and height of the rectangular structure are 2.7 m, 2.2 m, and 2.55 m respectively.
[0050] The method for testing by using the electrical safety testing device for equipment using combustible refrigerant according to the embodiments of the present application includes the following steps:
[0051] (1) Place the test equipment into the explosion-proof chamber main body and close the pressure relief port;
[0052] Exemplarily, place the equipment using flammable refrigerant to be tested inside the explosion-proof chamber main body, and seal the pressure relief port with a plastic film to ensure good airtightness inside the explosion-proof chamber main body.
[0053] (2) Configure flammable gas and start the mixing fan;
[0054] Open the flammable gas source, start to fill the inside of the explosion-proof chamber main body with flammable gas, and at the same time start the mixing fan inside the explosion-proof chamber main body to accelerate the mixing of the gas inside the chamber and ensure uniform concentration.
[0055] (3) Monitor the concentration of flammable gas and stop gas distribution after reaching the set concentration;
[0056] Exemplarily, the concentration of flammable gas inside the explosion-proof chamber main body is monitored in real time through a flammable gas concentration sensor. When the lowest value of multiple flammable gas concentration sensors inside the explosion-proof chamber main body exceeds 1.5 times the lower limit of the flammable gas concentration, stop inflating and the mixing fan.
[0057] (4) Start the test equipment and keep it running;
[0058] Exemplarily, start the equipment inside the explosion-proof chamber main body, keep the equipment running normally, and the continuous running time is not less than 2.0 hours.
[0059] (5) Adjust the working states of the gas source and the fan according to the concentration change situation;
[0060] During the experiment, when the lowest value of multiple flammable gas concentration sensors inside the explosion-proof chamber main body is lower than 1.2 times the lower limit of the flammable gas concentration, reopen the flammable gas source and the mixing fan. When the lowest value exceeds 1.5 times the lower limit of the flammable gas concentration, stop gas distribution and the mixing fan again.
[0061] (6) Record the experimental data and analyze the experimental results.
[0062] According to the experimental requirements, record the experimental data and shut down the equipment.
[0063] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the protection scope of the present application.
Claims
1. An electrical safety testing device for equipment using combustible refrigerants, characterized in that, The device includes: An explosion-proof chamber main body, which has a first chamber for placing the equipment using combustible refrigerant and a chamber door; one side of the explosion-proof chamber main body has a pressure relief opening communicating with the first chamber, and the pressure relief opening is sealed by a detachable plastic film; the explosion-proof chamber main body also has a gas source interface communicating with the first chamber; A combustible gas source, which is connected to the gas source interface through a first pipeline, and a control valve is arranged on the first pipeline; A mixing fan, which is installed on the explosion-proof chamber main body; A combustible gas concentration sensor, which is installed inside the explosion-proof chamber main body; A camera device, which is installed on the explosion-proof chamber main body; An explosion-proof axial flow fan, which is installed at the lower part of the explosion-proof chamber main body; A control system, which is connected to the control valve, the mixing fan, the explosion-proof axial flow fan, the combustible gas concentration sensor and the camera device.
2. The device according to claim 1, wherein The explosion-proof chamber main body is made of high-strength explosion-proof materials, and sealing structures are arranged at the joints and seams of the explosion-proof chamber main body. A pressing sealing strip and a locking device are arranged on the chamber door to ensure the airtightness inside the explosion-proof chamber main body.
3. The device according to claim 1, characterized in that, The device also includes an explosion-proof lamp, which is installed at the top of the explosion-proof chamber main body.
4. The device according to claim 1, characterized in that, The device includes a plurality of the combustible gas concentration sensors, and the plurality of combustible gas concentration sensors are evenly distributed inside the explosion-proof chamber main body.
5. The device according to claim 1, characterized in that, The device includes two of the mixing fans, and the two mixing fans are respectively installed on the left and right sides of the explosion-proof chamber main body.
6. The device according to claim 1, characterized in that The explosion-proof chamber main body is of a rectangular structure, and the length, width and height of the rectangular structure are 2.7m, 2.2m and 2.55m respectively.