Explosion-proof test cabin and use method thereof

Abstract

The invention provides an explosion-proof test cabin and a use method thereof, the explosion-proof test cabin comprises an environment cabin, a first water heat exchange area, a second water heat exchange area, an air conditioning box chamber and a front end condensation module are arranged in the environment cabin, the first water heat exchange area is in pipeline connection with the air conditioning box chamber, and the second water heat exchange area is in pipeline connection with the front end condensation module. The first anti-explosion chamber is arranged in the environment cabin, and an inner cavity of the first anti-explosion chamber accommodates a test air conditioning system for operating a test refrigerant and is provided with an explosion venting window, a plurality of sensors, an air inlet and an air outlet, and the air inlet and the air outlet form a ventilation pipeline; pipelines of an evaporator and a condenser of the air conditioning system respectively penetrate out of the first anti-explosion chamber and are correspondingly communicated with the first water heat exchange area and the second water heat exchange area, the air inlet and the air outlet are respectively communicated with an inner cavity of the first anti-explosion chamber and the outside of the environment cabin, and the explosion venting window is arranged at the air outlet. Effective safety measures can be provided, the explosion risk is avoided, and explosion prevention is independently carried out on the integrated module filled with the refrigerant.

Description

Technical Field

[0001] The invention relates to the field of vehicle-mounted refrigeration equipment, and in particular to an explosion-proof test chamber and a use method thereof. Background Art

[0002] With the rapid development of domestic new energy vehicle thermal management systems, and the gradual withdrawal of R134a from the market (based on the P-Fas Act), due to the technical requirements for environmental protection, high efficiency, safety and compatibility, research on R290 has become one of the main directions in the market. The automotive industry hopes to provide more environmentally friendly, efficient and safe thermal management solutions to meet the growing environmental and energy requirements. For its enthalpy difference test room, the required safety improvement, the explosion-proof test room is a necessary condition for the R290 test room. (R290 is a refrigerant that has received much attention in the field of thermal management, also known as propane, and R290 has a low explosion limit. In recent years, research on R290 has increased. The safety of R290 is one of the difficulties in promoting this program.)

[0003] In the existing technology, there are few patents about R290 explosion-proof test chambers, and at this stage, the entire test chamber is still being built into an explosion-proof test chamber:

[0004] The characteristics of the prior art explosion-proof test chamber are as follows:

[0005] (1) High cost and time to effect: The entire large laboratory site needs to be rebuilt, which requires high initial investment costs. The renovation and upgrading cycle is long, which is not conducive to rapid iteration and updating.

[0006] (2) High requirements for detection sensor accuracy and layout: Currently, there are many steady-state R290 detection sensors on the market, and transient detection technology is relatively lacking. By the time the sensor detects a leak, the leak may have already been large. For an entire large laboratory, more and more accurate gas detectors need to be arranged, which is costly and difficult.

[0007] (3) The explosion relief mechanism has limitations: For small-volume R290 systems, the explosion relief windows of large test laboratories are difficult to quickly detect pressure changes and meet pressure relief conditions.

[0008] (4) The ventilation duct of the entire laboratory is too large, which is not conducive to rapid and effective elimination.

[0009] In summary, traditional explosion-proof test laboratories have certain limitations in terms of cost, response speed, detection accuracy and intelligence.

[0010] In view of this, the present invention provides an explosion-proof test chamber and a method for using the same. Summary of the invention

[0011] In response to the problems in the prior art, the explosion-proof test chamber and the method of using the same of the present invention overcome the difficulties of the prior art, can provide effective safety measures to avoid potential explosion risks, and separately explosion-proof the integrated module containing the refrigerant.

[0012] An embodiment of the present invention provides an explosion-proof test chamber, comprising:

[0013] The environmental cabin is provided with a first water heat exchange area, a second water heat exchange area, an air conditioning chamber and a front end condensing module. The first water heat exchange area pipeline is connected to the air conditioning chamber, and the second water heat exchange area pipeline is connected to the front end condensing module.

[0014] A first explosion-proof chamber is arranged in the environmental cabin. The inner cavity of the first explosion-proof chamber accommodates a test air-conditioning system that runs a test refrigerant and is provided with an explosion-proof window, a plurality of sensors, and an air inlet and an air outlet that form a ventilation duct. The pipelines of the evaporator and the condenser of the test air-conditioning system respectively pass through the first explosion-proof chamber and are correspondingly connected to the first water heat exchange zone and the second water heat exchange zone. The air inlet and the air outlet are respectively connected to the inner cavity of the first explosion-proof chamber and the outside of the environmental cabin. The explosion-proof window is arranged at the air outlet.

[0015] Preferably, it also includes a second explosion-proof chamber, which is arranged outside the environmental chamber. The second explosion-proof chamber contains a test refrigerant container, and the test refrigerant container is connected to a refrigerant switch interface in the inner cavity of the first explosion-proof chamber through a refrigerant pipeline.

[0016] Preferably, the second explosion-proof chamber includes a second explosion-proof wall and a second explosion-proof door.

[0017] Preferably, the inner cavity of the first explosion-proof chamber is provided with a fire extinguishing device, a gas detection sensor and a pressure sensor respectively.

[0018] Preferably, the first explosion-proof chamber includes a first explosion-proof wall and a first explosion-proof door.

[0019] Preferably, the environmental compartment is divided into a test sub-compartment and a passenger sub-compartment accommodating only the air-conditioned box compartment.

[0020] Preferably, the test air conditioning system further comprises a compressor and a shut-off valve, the compressor is connected to the evaporator and the condenser respectively, and the evaporator is connected to the condenser via the shut-off valve.

[0021] Preferably, the environmental chamber is also provided with an audible and visual alarm, a forced stop button and a monitoring module.

[0022] Preferably, it also includes a battery simulation chamber, which is arranged outside the environmental chamber.

[0023] An embodiment of the present invention further provides a method for using an explosion-proof test chamber, using the above-mentioned explosion-proof test chamber, comprising the following steps:

[0024] S110, moving the air conditioning system to be tested into the first explosion-proof chamber.

[0025] S120, injecting a test refrigerant into the test air-conditioning system through the refrigerant switch interface.

[0026] S130, passing the pipelines of the evaporator and the condenser of the test air-conditioning system out of the first explosion-proof chamber and correspondingly connecting to the first water heat exchange area and the second water heat exchange area.

[0027] S140, driving the test air conditioning system to work, and starting each of the sensors to collect parameters in the first explosion-proof chamber and the working status of each component.

[0028] S150: When leakage of the test refrigerant is detected in the first explosion-proof chamber, the ventilation duct starts exhausting air and the explosion-proof window releases pressure. When the ventilation duct fails and the pressure in the first explosion-proof chamber is detected to be beyond a preset range, the explosion-proof window releases pressure.

[0029] The explosion-proof test chamber and the method of using the same of the present invention can provide effective safety measures to avoid potential explosion risks, and can individually explosion-proof the integrated module containing refrigerant, thereby having the advantages of safety, intelligence, economy and flexibility. Compared with traditional solutions, it is more suitable for test verification under the trend of automotive air-conditioning R290 integrated modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Other features, objectives and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0031] Figure 1 It is a structural schematic diagram of the explosion-proof test chamber of the present invention.

[0032] Figure 2 It is a schematic diagram of the operating state of the explosion-proof test chamber of the present invention.

[0033] Reference numerals

[0034] 1. First explosion-proof chamber

[0035] 11. The first explosion-proof wall

[0036] 12 First explosion-proof door

[0037] 13 Refrigerant switch interface

[0038] 14 Fire extinguishing equipment

[0039] 15 Gas Detection Sensor

[0040] 16. Pressure sensor

[0041] 17 Air Inlet

[0042] 18 Air outlet

[0043] 2 Environmental Chamber

[0044] 20 Sound and light alarm

[0045] 21 Experimental Sub-Chamber

[0046] 22 Crew compartment

[0047] 23. First water heat exchange zone

[0048] 24 Second water heat exchange area

[0049] 25 Air conditioning room

[0050] 26 Front condensation module

[0051] 27 Battery Simulation Room

[0052] 28 Forced stop button

[0053] 29 Monitoring module

[0054] 3 Second explosion-proof chamber

[0055] 31 Second explosion-proof wall

[0056] 32 Second explosion-proof door

[0057] 33 Refrigerant pipeline

[0058] 34 Water valve

[0059] 4 Testing the air conditioning system

[0060] 41 Compressor

[0061] 42 Evaporator

[0062] 43 Shut-off valve

[0063] 44 Condenser DETAILED DESCRIPTION

[0064] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the present application. The present application can also be implemented or applied through other different specific implementation methods, and the details in the present application can also be modified or changed in various ways according to different viewpoints and application systems without departing from the spirit of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0065] The following is a detailed description of the embodiments of the present application with reference to the accompanying drawings so that those skilled in the art can easily implement the present application. The present application can be embodied in a variety of different forms and is not limited to the embodiments described herein.

[0066] In the representations of the present application, the representations with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the represented specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples represented in the present application and the features of the different embodiments or examples, unless they contradict each other.

[0067] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0068] In order to clearly describe the present application, components irrelevant to the description are omitted, and the same reference symbols are given to the same or similar components throughout the specification.

[0069] Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. In addition, when a device is said to "include" a certain component, unless otherwise stated, it does not exclude other components, but means that other components may be included.

[0070] When a device is said to be "on" another device, it may be directly on the other device, but there may also be other devices between it. In contrast, when a device is said to be "directly" on another device, there are no other devices between it.

[0071] Although the terms first, second, etc. are used to represent various elements in some examples, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first interface and the second interface, etc. are represented. Moreover, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising" and "including" indicate the existence of features, steps, operations, elements, components, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or more other features, steps, operations, elements, components, projects, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A. B. C. A and B. A and C. B and C. A, B and C". Only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way, the exception to this definition will occur.

[0072] The technical terms used herein are only used to refer to specific embodiments and are not intended to limit the present application. The singular form used herein also includes the plural form unless the sentence clearly indicates the contrary meaning. The meaning of "including" used in the specification is to specify specific characteristics, regions, integers, steps, operations, elements and / or components, and does not exclude the existence or addition of other characteristics, regions, integers, steps, operations, elements and / or components.

[0073] Although not defined differently, all terms, including technical and scientific terms used herein, have the same meaning as those generally understood by those skilled in the art to which this application belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with the relevant technical literature and the contents of the current disclosure, and unless defined, shall not be overly interpreted as ideal or very formal meanings.

[0074] Figure 1 It is a structural schematic diagram of the explosion-proof test chamber of the present invention. Figure 2 Schematic diagram of the operation status of the explosion-proof test chamber of the present invention. Figure 1 and 2As shown, the explosion-proof test cabin of the present invention comprises: an environmental cabin 2 and a first explosion-proof chamber 1. Among them, the environmental cabin 2 is provided with a first water heat exchange area 23, a second water heat exchange area 24, an air conditioning chamber 25 and a front-end condensing module 26, the first water heat exchange area 23 is connected to the air conditioning chamber 25 by a pipeline, and the second water heat exchange area 24 is connected to the front-end condensing module 26 by a pipeline. The first explosion-proof chamber 1 is arranged in the environmental cabin 2, the inner cavity of the first explosion-proof chamber 1 accommodates a test air conditioning system 4 for running a test refrigerant and is provided with an explosion-proof window (not shown in the figure), a number of sensors, and an air inlet 17 and an air outlet 18 forming a ventilation duct, the pipelines of the evaporator 42 and the condenser 44 of the test air conditioning system 4 respectively pass through the first explosion-proof chamber 1 and are correspondingly connected to the first water heat exchange area 23 and the second water heat exchange area 24, the air inlet 17 and the air outlet 18 are respectively connected to the inner cavity of the first explosion-proof chamber 1 and the outside of the environmental cabin 2, and the explosion-proof window is arranged at the air outlet 18. Compared with the prior art, the volume of the present invention is significantly reduced, especially the use of materials such as explosion-proof walls is greatly reduced, which is conducive to flexible layout, transformation and upgrading. After the space is reduced, the requirements for detection sensor accuracy and layout of the present invention are also significantly reduced. Moreover, even if an explosion occurs, due to the small space, the explosion venting window can meet the demand for rapid pressure relief, thereby enhancing safety.

[0075] In a preferred embodiment, it also includes a second explosion-proof chamber 3, which is arranged outside the environmental chamber 2. The second explosion-proof chamber 3 contains a test refrigerant container, and the test refrigerant container is connected to a refrigerant switch interface 13 in the inner cavity of the first explosion-proof chamber 1 through a refrigerant pipeline 33, but it is not limited to this.

[0076] In a preferred embodiment, the second explosion-proof chamber 3 includes a second explosion-proof wall 31 and a second explosion-proof door 32, but is not limited thereto.

[0077] In a preferred embodiment, the inner cavity of the first explosion-proof chamber 1 is respectively provided with a fire extinguishing device 14, a gas detection sensor 15 and a pressure sensor 16, but the present invention is not limited thereto.

[0078] In a preferred embodiment, the first explosion-proof chamber 1 includes a first explosion-proof wall 11 and a first explosion-proof door 12, but is not limited thereto.

[0079] In a preferred embodiment, the environmental compartment 2 is divided into a test sub-compartment 21 and a passenger sub-compartment 22 that only accommodates the air-conditioning box compartment 25, but the present invention is not limited thereto.

[0080] In a preferred embodiment, the test air conditioning system 4 further includes a compressor 41 and a shut-off valve 43 , the compressor 41 is connected to the evaporator 42 and the condenser 44 respectively, and the evaporator 42 is connected to the condenser 44 through the shut-off valve 43 , but this is not limited thereto.

[0081] In a preferred embodiment, the environmental chamber 2 is further provided with an audible and visual alarm 20, a forced stop button 28 and a monitoring module 29, but the present invention is not limited thereto.

[0082] In a preferred embodiment, a battery simulation chamber 27 is also included, which is arranged outside the environmental chamber 2. The battery simulation chamber 27 is connected to various components. In this embodiment, the battery simulation chamber is used to simulate the cooling of the battery by the air conditioning system, not to power the various components. In addition, the battery is also cooled by connecting the first water heat exchange area 23 with the pipe of the battery simulation chamber 27 (when the battery is heated to a certain temperature during the operation of the vehicle, the air conditioning system is also required to cool it), but it is not limited to this.

[0083] In a preferred embodiment, a coolant pipeline from the second water heat exchange area 24 to the air conditioning box 25 is placed to achieve a heating effect on the air conditioning box in the system. In addition, the opening of the heating mode needs to be adjusted by the water valve 34, that is, when passing through the air conditioning box 25, it does not pass through the front condensing module 26, but it is not limited to this.

[0084] The present invention is aimed at the automotive air-conditioning system based on R290 refrigerant, and is showing a development trend of integrated modularization on the refrigerant side. Aiming at the transformation problems of existing traditional refrigerant test laboratories such as R134a: high transformation cost, long replacement time, etc., the present invention proposes a solution: on the basis of the existing enthalpy difference test laboratory, only the refrigerant side is transformed into an independent explosion-proof chamber, which can greatly reduce the total transformation cost of the R290 explosion-proof test laboratory. This invention proposes an innovative method for partial transformation based on the existing laboratory. Aiming at the characteristics of R290 refrigerant, the explosion-proof design of the refrigerant side is optimized, thereby effectively reducing the overall transformation cost and shortening the replacement cycle (replacement: 1. The traditional laboratory is transformed into an explosion-proof laboratory. 2. The integrated module explosion-proof laboratory adds new functions), which has good practicality and market prospects.

[0085] The present invention proposes a design scheme of designing an independent refrigerant side integrated module explosion-proof test room based on the design of the existing automobile air conditioning system test room. The design scheme mainly consists of two parts: the original test room and the integrated module explosion-proof treatment room.

[0086] The key innovation of the present invention is to design an independent explosion-proof chamber for the refrigerant-side integrated module based on the existing test chamber.

[0087] Components of the test room in the present invention: The original test room includes standard facilities such as the gas cylinder room, condensation module, evaporation chamber (gas cylinder room, front-end condensation module, water heat exchange area, evaporation chamber, battery simulation room, insulation wall, fan coil unit, fresh air unit, air duct assembly, water pipe assembly, control unit). The newly added independent explosion-proof room includes special designs such as explosion-proof walls, explosion-proof windows, and explosion-proof doors (the refrigerant side integrated module is placed indoors, and the module is optional).

[0088] The explosion-proof design of the present invention: The ventilation system adopts explosion-proof equipment, which is linked with gas detection and pressure sensors. The explosion-proof window is placed in the ventilation channel, and the strategy is: when a leak is detected, the ventilation channel starts to exhaust air and the explosion-proof window releases pressure. When the ventilation channel fails and abnormal pressure is detected, the explosion-proof window releases pressure. Explosion-proof sealing measures are adopted for each outgoing wiring harness and pipeline of the integrated module to prevent the integrated module from leaking to the external environment, to prevent flames and explosion gases from entering the outside of the explosion-proof room of the integrated module during an explosion, and to reduce the risk of explosion accidents.

[0089] The indoor negative pressure design in the present invention: the explosion-proof fan continuously maintains the exhaust state, maintaining the micro explosion-proof room in a negative pressure state (low-load operation), and a pressure gauge is installed indoors to measure the ambient pressure of the cabin. When the pressure rises / the gas detector detects a leak, the ventilation duct runs at full load, and an audible and visual alarm is sounded. Note: The indoor pressure is maintained at -0.05MPaA. When the pressure rises to 0MPaA, it indicates a leak. When the pressure reaches the preset value, the pressure is automatically discharged (linked to the pressure sensor). There are two pressure presets (micro-leakage: the pressure is slightly higher than the negative pressure, and the leakage is serious, and the pressure is higher than the pressure relief pressure setting) to reduce the risk of explosion. The ventilation duct and the explosion relief window are double explosion-proof.

[0090] The fire extinguishing and smoke detection design in the present invention: a smoke alarm device in the micro explosion-proof room, when the smoke alarm detects smoke, the fire extinguishing device starts to extinguish the smoke point.

[0091] In addition, the optional solutions in the present invention are: refrigerant integrated module: compressor, water-cooled condenser, evaporator (water-cooled), chiller (optional), valves (expansion valve, solenoid valve, etc. are optional), wiring harness box (including strong and weak wire harnesses), pipeline / flow channel plate, connecting bracket. An independent gas cylinder room is also required, the room is made of fireproof and explosion-proof materials, and the room is provided with an explosion-proof surface. Ventilation channel: It is composed of an independent air duct, a ventilation unit, an exhaust valve, and an air inlet valve. Its air supply and exhaust system adopts explosion-proof ventilation equipment. The opening of the ventilation channel is associated with the gas detector and the air pressure sensor. When a leakage / pressure rise is detected, the ventilation duct is opened. Ventilation duct: the air inlet is upward and the exhaust outlet is downward. The explosion-proof window is similar to the explosion-proof test room. Since it is set in the independent explosion-proof cabin of the integrated module, its spatial position is small. The original explosion-proof test room has a large space. When the ventilation channel cannot work, the pressure rise is not obvious in the early stage of leakage. The spatial position of the independent explosion-proof cabin is small, and the sensitivity to leakage is stronger. At the same time, when an explosion occurs inside, as the explosion point, the explosion direction is: from the explosion venting window to the exhaust duct. The explosion venting window is placed in the ventilation duct, and the strategy is: when a leak is detected, the ventilation duct starts to exhaust and the explosion venting window releases pressure. When the ventilation duct fails and the pressure abnormality is detected, the explosion venting window releases pressure. The preset explosion venting pressure data is 0.15MPaA. When the indoor pressure reaches 0.15MPaA, the explosion venting window automatically opens to discharge pressure and release explosion. (Note: When this pressure is reached, it means that the leakage is already serious.) A fixing is set on the test piece fixing table, and the refrigerant integrated module explosion-proof room is connected through the fixing. The controller is connected to: sound and light alarm, pressure sensor, gas detector, ventilation device, main power supply, monitor. An emergency alarm button is set in the operation room: emergency stop operation button, sound and light alarm and immediate exhaust, and alarm information is reported.

[0092] The present invention has stronger explosion-proof performance: it is equipped with an independent explosion-proof cabin with small space and high pressure sensitivity. Once a leak occurs, it can be quickly detected and ventilation and discharge can be started. It is equipped with an adjustable explosion-proof window, which automatically discharges pressure when the pressure reaches the preset value, greatly reducing the risk of explosion. All cable pipelines connected to the integrated module are explosion-proof sealed to prevent leakage from spreading to the external environment.

[0093] The present invention has more complete intelligent monitoring: it integrates intelligent control measures such as gas detection, pressure sensing, ventilation linkage, etc. to achieve comprehensive safety monitoring.

[0094] The present invention has higher test efficiency: the refrigerant integrated module is independently arranged in the explosion-proof cabin, which is convenient for maintenance and debugging and improves test efficiency. The preset pressure value of the explosion venting window can be flexibly adjusted according to the pressure characteristics of different refrigerants.

[0095] The present invention has stronger scalability: it can be upgraded and renovated on the basis of the existing laboratory without rebuilding the entire test site, which greatly reduces the investment cost. The explosion-proof cabin is small in size and occupies limited space, which is easy to integrate into test facilities in different occasions.

[0096] The renovation cost of the present invention is lower than that of the traditional laboratory: there is no need to rebuild the entire test site, and upgrading and renovation can be carried out on the existing basis, which can greatly reduce the investment cost.

[0097] The present invention has a short replacement time: the explosion-proof cabin is small in size and has a short installation and debugging cycle, which is convenient for rapid upgrading according to needs.

[0098] The explosion hazard of the present invention is low: the explosion of the micro explosion-proof chamber only involves the explosion of the small chamber, and has little harm to the external laboratory.

[0099] In summary, the design of the explosion-proof test chamber combines the advantages of safety, intelligence, economy and flexibility. Compared with traditional solutions, it is more suitable for test verification under the trend of automotive air-conditioning R290 integrated module.

[0100] The independent explosion-proof measures of the present invention are not only applicable to R290 refrigerant, but can also be applied to laboratory renovation of other flammable and explosive refrigerants. Specifically, it is mainly reflected in the following aspects:

[0101] 1. Universal explosion-proof design. The explosion-proof technical measures proposed in this patent, such as flammable gas detection and explosion-proof windows, are applicable to the test environment of various flammable and explosive refrigerants. These universal explosion-proof designs can be flexibly applied to laboratories of different models and sizes to meet the safety testing requirements of different refrigerants.

[0102] 2. Standardized transformation plan. The patent has designed a standardized explosion-proof cabin transformation plan, including key steps such as layout optimization and installation of protective devices. This plan can be replicated and promoted to other laboratories without the need to design from scratch each time, greatly reducing the cost and time of transformation.

[0103] The explosion-proof measures of the present invention have wide applicability and can be applied not only to R290 refrigerant, but also to laboratory renovation of other flammable and explosive refrigerants, providing a safe and reliable testing environment for technological innovation in the refrigeration industry.

[0104] The present invention also provides a method for using an explosion-proof test chamber, using the above-mentioned explosion-proof test chamber, comprising the following steps:

[0105] S110 , moving the test air conditioning system 4 to be tested into the first explosion-proof chamber 1 .

[0106] S120 , injecting a test refrigerant into the test air conditioning system 4 through the refrigerant switch interface 13 .

[0107] S130 , passing the pipelines of the evaporator 42 and the condenser 44 of the test air conditioning system 4 out of the first explosion-proof chamber 1 and correspondingly connecting to the first water heat exchange area 23 and the second water heat exchange area 24 .

[0108] S140, driving the test air conditioning system 4 to work, and starting each sensor to collect parameters in the first explosion-proof chamber 1 and the working status of each component.

[0109] S150, when the test refrigerant leaks in the first explosion-proof chamber 1, the ventilation duct starts exhausting air and the explosion-proof window releases pressure. When the ventilation duct fails, when it is detected that the pressure in the first explosion-proof chamber 1 exceeds the preset range, the explosion-proof window releases pressure. The relevant technical features are as described above and will not be repeated here.

[0110] The technical problems that the present invention can solve are:

[0111] (1) Partial explosion-proof modification:

[0112] The cost of comprehensively transforming the entire laboratory into an explosion-proof laboratory is high, so local explosion-proof transformation can be adopted. Special explosion-proof treatment is carried out for key areas of R290 refrigerant performance testing, such as refrigerant integration modules, including the use of anti-static materials and combustible gas detection. This local explosion-proof transformation can maximize the use of the original laboratory infrastructure and significantly reduce the transformation cost.

[0113] (2) Independent explosion-proof refrigerant integrated module:

[0114] R290 air conditioning systems for automobiles usually use water circuit secondary heat exchange, and the integrated module on the refrigerant side can be placed independently in a small explosion-proof room. Special leakage detection and explosion-proof design are carried out for this small explosion-proof room, including concentration alarm, pressure physical explosion relief, anti-static, combustible gas detection and other measures to ensure the safety of refrigerant testing. This design concentrates the explosion-proof area in key areas and reduces the need for modification of the entire laboratory.

[0115] (3) Experimental process optimization:

[0116] On the basis of partial explosion-proof transformation, the test process can be further optimized to minimize the exposure time of the R290 refrigerant integrated module in the test room. For example, the preset integrated module only needs its water circuit to be connected to the water pipe side of the small room, and after the strong and weak electricity are connected, the test can be carried out, shortening the bench installation time, etc. The explosion risk in the test room can be further reduced through process optimization, and safety can be improved.

[0117] In summary, through measures such as local explosion-proof modification, independent explosion-proof of refrigerant integrated modules, and test process optimization, the explosion-proof requirements of R290 refrigerant performance testing can be met while retaining the original laboratory infrastructure, greatly reducing the modification cost and providing more economical and efficient support for automotive thermal management technology innovation.

[0118] Safety: As a Class A3 refrigerant, the biggest challenge facing the application of R290 is that it is flammable and explosive. The explosion limit of R290 is 2.1-9.5VOL% in dry air at 25°C and 1.01325×105Pa, and the ignition temperature is between 450-470°C, making it more dangerous in automotive applications. Since R290 is a flammable and explosive gas, its use and management require strict safety standards and measures. Therefore, one of the technical requirements for R290 is to ensure safety in the automotive use environment, including strict sealing performance and leakage control.

[0119] In view of the lower explosion limit of R290, the following technical requirements need to be met in its performance testing laboratory:

[0120] Safety measures: Since R290 is a flammable and explosive gas, the laboratory must follow strict safety measures to ensure safety during the experiment. This includes safe ventilation systems, explosion-proof equipment, fire alarm systems, automatic gas detection devices, etc. Laboratory operators need to receive special training to understand how to properly handle flammable and explosive gases, prevent fires, and respond to emergencies.

[0121] Gas leak detection and control: To ensure that the R290 concentration in the laboratory remains within a safe range, accurate and sensitive gas leak detection equipment needs to be installed. These devices can detect R290 leaks in a timely manner and trigger alarms or take automatic protective measures. In addition, the laboratory also needs to set up effective leak control measures, such as gas leak alarm systems, sealing equipment and safety valves.

[0122] Explosion protection equipment: In order to prevent the explosion risk caused by R290, the laboratory needs to take corresponding explosion protection measures. This includes installing explosion isolation equipment, explosion fire fighting equipment, explosion-proof electrical equipment, etc. These equipment can effectively control and reduce the impact of explosion accidents and protect the safety of laboratories and operators.

[0123] Simulation and monitoring systems: In order to study the explosion characteristics of R290 at specific concentrations, laboratories need to develop or purchase corresponding simulation and monitoring systems. These systems can simulate R290 environments at different concentrations and monitor key parameters such as gas concentration, temperature, pressure, etc. Through real-time monitoring and data recording, researchers can better understand the performance and potential risks of R290 refrigerant in air conditioning systems.

[0124] In summary, the explosion-proof test chamber and the method of using the same of the present invention can provide effective safety measures to avoid potential explosion risks, and can individually explosion-proof the integrated module containing refrigerant, and has the advantages of safety, intelligence, economy and flexibility. Compared with traditional solutions, it is more suitable for test verification under the trend of automotive air-conditioning R290 integrated modules.

[0125] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An explosion-proof test chamber, characterized in that: include: An environmental chamber (2), wherein a first water heat exchange area (23), a second water heat exchange area (24), an air conditioning chamber (25) and a front-end condensing module (26) are provided in the environmental chamber (2), wherein a pipeline of the first water heat exchange area (23) is connected to the air conditioning chamber (25), and a pipeline of the second water heat exchange area (24) is connected to the front-end condensing module (26); A first explosion-proof chamber (1) is arranged in the environmental chamber (2); the inner cavity of the first explosion-proof chamber (1) accommodates a test air-conditioning system (4) for running a test refrigerant and is provided with an explosion-proof window, a plurality of sensors, and an air inlet (17) and an air outlet (18) forming a ventilation duct; the pipelines of the evaporator (42) and the condenser (44) of the test air-conditioning system (4) respectively pass through the first explosion-proof chamber (1) and are correspondingly connected to the first water heat exchange area (23) and the second water heat exchange area (24); the air inlet (17) and the air outlet (18) are respectively connected to the inner cavity of the first explosion-proof chamber (1) and the outside of the environmental chamber (2); and the explosion-proof window is arranged at the air outlet (18).

2. The explosion-proof test chamber according to claim 1, characterized in that: It also includes a second explosion-proof chamber (3) arranged outside the environmental chamber (2), wherein the second explosion-proof chamber (3) accommodates a test refrigerant container, and the test refrigerant container is connected to a refrigerant switch interface (13) in the inner cavity of the first explosion-proof chamber (1) through a refrigerant pipeline (33).

3. The explosion-proof test chamber according to claim 2, characterized in that: The second explosion-proof chamber (3) comprises a second explosion-proof wall (31) and a second explosion-proof door (32).

4. The explosion-proof test chamber according to claim 1, characterized in that: The inner cavity of the first explosion-proof chamber (1) is respectively provided with a fire extinguishing device (14), a gas detection sensor (15) and a pressure sensor (16).

5. The explosion-proof test chamber according to claim 4, characterized in that: The first explosion-proof chamber (1) comprises a first explosion-proof wall (11) and a first explosion-proof door (12).

6. The explosion-proof test chamber according to claim 1, characterized in that: The environmental cabin (2) is divided into a test sub-cabin (21) and a passenger sub-cabin (22) which only accommodates an air-conditioning box chamber (25).

7. The explosion-proof test chamber according to claim 1, characterized in that: The test air conditioning system (4) further comprises a compressor (41) and a shut-off valve (43); the compressor (41) is connected to the evaporator (42) and the condenser (44) respectively; and the evaporator (42) is connected to the condenser (44) via the shut-off valve (43).

8. The explosion-proof test chamber according to claim 1, characterized in that: The environmental chamber (2) is also provided with an audible and visual alarm (20), a forced stop button (28) and a monitoring module (29).

9. The explosion-proof test chamber according to claim 1, characterized in that: It also includes a battery simulation chamber (27) which is arranged outside the environmental chamber (2).

10. A method for using an explosion-proof test chamber, characterized in that: The explosion-proof test chamber as claimed in claim 2 comprises the following steps: S110, moving the test air conditioning system (4) to be tested into the first explosion-proof chamber (1); S120, injecting a test refrigerant into the test air conditioning system (4) through the refrigerant switch interface (13); S130, passing the pipelines of the evaporator (42) and the condenser (44) of the test air conditioning system (4) out of the first explosion-proof chamber (1) and correspondingly connecting the first water heat exchange area (23) and the second water heat exchange area (24); S140, driving the test air conditioning system (4) to operate, and starting each of the sensors to collect parameters in the first explosion-proof chamber (1) and the operating status of each component; and S150. When leakage of the test refrigerant is detected in the first explosion-proof chamber (1), the ventilation duct starts exhausting air and the explosion-proof window releases pressure. When a failure occurs in the ventilation duct and the pressure in the first explosion-proof chamber (1) is detected to be beyond a preset range, the explosion-proof window releases pressure.

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