Explosion-proof test cabin

Abstract

The utility model provides an explosion-proof test cabin which 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 connected with the air conditioning box chamber through a pipeline, and the second water heat exchange area is connected with the front-end condensation module through a pipeline. 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. According to the utility model, effective safety measures can be provided, the explosion risk is avoided, and the integrated module filled with the refrigerant is independently subjected to explosion prevention.

Description

Technical Field

[0001] The utility model relates to the field of vehicle-mounted refrigeration equipment, specifically to an explosion-proof test chamber. Background Art

[0002] Due to the technical requirements for environmental protection, high efficiency, safety and compatibility, the research on R290 in the market has become one of the main directions. 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 chamber, the safety needs to be improved, and the explosion-proof test chamber is a necessary condition for the R290 test chamber. (R290 is a refrigerant that has attracted much attention in the field of thermal management, also known as propane, and the explosion limit of R290 is relatively low. In recent years, the research on R290 has increased. The safety of R290 is one of the difficulties in promoting this solution.)

[0003] In the prior art, there are few patents on the R290 explosion-proof test chamber, and at present, it is still in the stage of building the entire test chamber into an explosion-proof test chamber:

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

[0005] (1) High cost and long time to take effect: It is necessary to reconstruct the entire large test chamber site, and the upfront investment cost is relatively high. The transformation and upgrade cycle is long, which is not conducive to rapid iteration and update.

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

[0007] (3) Limitations in the explosion relief mechanism: For a small-volume R290 system, the explosion relief windows of a large test chamber are difficult to quickly detect pressure changes and meet the pressure relief conditions.

[0008] (4) The volume of the ventilation ducts in the entire test chamber is too large, which is not conducive to quick and effective removal and treatment.

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

[0010] In view of this, the utility model provides an explosion-proof test chamber. Content of the Utility Model

[0011] In view of the problems in the prior art, the explosion-proof test chamber of the present utility model overcomes the difficulties of the prior art and can provide effective safety measures to avoid potential explosion risks, and separately conduct explosion-proof for the integrated module filled with refrigerant.

[0012] An embodiment of the present utility model provides an explosion-proof test chamber, including:

[0013] An environmental chamber, in which a first water heat exchange area, a second water heat exchange area, an air-conditioning box chamber and a front-end condensation module are provided. The first water heat exchange area is connected to the air-conditioning box chamber through a pipeline, and the second water heat exchange area is connected to the front-end condensation module through a pipeline.

[0014] A first explosion-proof chamber is arranged in the environmental chamber. The inner cavity of the first explosion-proof chamber accommodates a test air-conditioning system for running test refrigerant and is provided with a blast relief window, several sensors, an air inlet and an air outlet forming 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 area and the second water heat exchange area. The air inlet and the air outlet are respectively communicated with the inner cavity of the first explosion-proof chamber and outside the environmental chamber, and the blast relief window is arranged at the air outlet.

[0015] Preferably, it further includes a second explosion-proof chamber arranged outside the environmental chamber. The second explosion-proof chamber internally accommodates 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, a fire extinguishing device, a gas detection sensor and a pressure sensor are respectively arranged in the inner cavity of the first explosion-proof chamber.

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

[0019] Preferably, the environmental chamber is divided into a test sub-chamber and a crew sub-chamber that only accommodates the air-conditioning box chamber.

[0020] Preferably, the test air-conditioning system further includes a compressor and a throttling valve. The compressor is respectively connected to the evaporator and the condenser, and the evaporator is connected to the condenser through the throttling valve.

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

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

[0023] An embodiment of the present utility model further provides a method for using an explosion-proof test chamber. Using the above explosion-proof test chamber, the method includes the following steps:

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

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

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

[0027] S140. Drive the test air-conditioning system to work, and start each sensor to collect the parameters in the first explosion-proof chamber and the working states of each component. And

[0028] S150. When it is detected that the test refrigerant leaks in the first explosion-proof chamber, the ventilation duct starts to exhaust air, and the explosion relief window relieves pressure. When a failure occurs in the ventilation duct and it is detected that the pressure in the first explosion-proof chamber exceeds the preset range, the explosion relief window relieves pressure.

[0029] The explosion-proof test chamber of the present utility model can provide effective safety measures to avoid potential explosion risks. It separately conducts explosion protection on the integrated module filled with refrigerant, and has the advantages of safety, intelligence, economy, and flexibility. Compared with the traditional scheme, it is more suitable for the test verification under the trend of the R290 integrated module for automotive air conditioners. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Other features, purposes, and advantages of the present utility model will become more obvious by reading the detailed description of the non-restrictive embodiments with reference to the following drawings.

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

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

[0033] REFERENCE SIGNS

[0034] 1 First explosion-proof chamber

[0035] 11 First explosion-proof wall

[0036] 12 First explosion-proof door

[0037] 13 Refrigerant switch interface

[0038] 14 Fire extinguishing device

[0039] 15 Gas detection sensor

[0040] 16 Pressure sensor

[0041] 17 Air inlet

[0042] 18 Air outlet

[0043] 2 Environmental chamber

[0044] 20 Acoustic-optic alarm

[0045] 21 Test sub-chamber

[0046] 22 Crew compartment

[0047] 23 First water heat exchange area

[0048] 24 Second water heat exchange area

[0049] 25 Air conditioner box room

[0050] 26 Front-end condensation module

[0051] 27 Battery simulation room

[0052] 28 Emergency 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 Test air conditioning system

[0060] 41 Compressor

[0061] 42 Evaporator

[0062] 43 Throttle valve

[0063] 44 Condenser Detailed implementation method

[0064] The following specific examples illustrate the implementation modes of the present application. 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 modes. The details in the present application can also be modified or changed according to different viewpoints and application systems without departing from the spirit of the present application. It should be noted that, without conflict, the embodiments and features in the embodiments of the present application can be combined with each other.

[0065] The following takes the attached drawings as a reference and details the embodiments of the present application so that those skilled in the technical field to which the present application belongs can easily implement it. The present application can be embodied in many different forms and is not limited to the embodiments described herein.

[0066] In the description of the present application, the reference terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics represented can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples represented in the present application and the features of different embodiments or examples.

[0067] In addition, the terms "first" and "second" are only used for the purpose of indication and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0068] To clearly illustrate the present application, devices irrelevant to the description are omitted, and the same or similar components throughout the specification are given the same reference numerals.

[0069] Throughout the specification, when it is said that a device is "connected" to another device, this includes not only the case of "direct connection", but also the case of "indirect connection" with other elements placed in between. In addition, when it is said that a certain device "includes" a certain component, unless there is a particularly contrary record, it does not exclude other components, but means that other components can also be included.

[0070] When it is said that a device is "above" another device, this can be directly above the other device, but there can also be other devices in between. When it is said that a device is "directly" "above" another device, there are no other devices in between.

[0071] Although in some instances the terms first, second, etc. are used herein to denote various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, the first interface and the second interface, etc. are indicated. Furthermore, as used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms unless the context clearly dictates otherwise. It should be further understood that the terms "comprising", "including" indicate the presence of the features, steps, operations, elements, components, items, kinds, and / or groups, but do not preclude the presence, occurrence or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The term "or" and "and / or" used herein are to be construed as inclusive, or meaning any one or any combination. Thus, "A, B or C" or "A, B and / or C" means "any one of the following: A. B. C. A and B. A and C. B and C. A, B and C". An exception to this definition will occur only when the combination of elements, functions, steps or operations are mutually exclusive in some manner.

[0072] The technical terms used herein are only for referring to specific embodiments and are not intended to limit the present application. The singular forms used herein also include the plural forms as long as the context does not clearly indicate the contrary. The meaning of "including" used in the specification is to embody 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, including the technical terms and scientific terms used herein, all terms have the same meaning as commonly understood by those skilled in the technical field to which the present application pertains. Terms defined in commonly used dictionaries are additionally interpreted to have a meaning consistent with the relevant technical literature and the content currently presented, and should not be over-interpreted as ideal or overly formulaic meanings as long as they are not defined.

[0074] Figure 1 is a schematic structural view of the explosion-proof test chamber of the present utility model. Figure 2 is a schematic view of the operating state of the explosion-proof test chamber of the present utility model. Refer to Figure 1 and 2As shown in the figure, the explosion-proof test chamber of the present utility model includes an environmental chamber 2 and a first explosion-proof chamber 1. Among them, a first water heat exchange area 23, a second water heat exchange area 24, an air-conditioning box chamber 25, and a front-end condensation module 26 are provided in the environmental chamber 2. The first water heat exchange area 23 is connected to the air-conditioning box chamber 25 through pipelines, and the second water heat exchange area 24 is connected to the front-end condensation module 26 through pipelines. The 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 test refrigerant and is provided with a pressure relief window (not shown in the figure), several sensors, 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. The pressure relief window is arranged at the air outlet 18. Compared with the prior art, the volume of the present utility model 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 and sensing accuracy and layout of the present utility model are also significantly reduced. Moreover, even if an explosion occurs, due to the small space, the pressure relief window can meet the rapid pressure relief requirement, enhancing the safety.

[0075] In a preferred embodiment, it further includes a second explosion-proof chamber 3, which is arranged outside the environmental chamber 2. The second explosion-proof chamber 3 internally accommodates a test refrigerant container. 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 not limited thereto.

[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 not limited thereto.

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

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

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

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

[0082] In a preferred embodiment, it further includes a battery simulation chamber 27, which is arranged outside the environmental chamber 2. The battery simulation chamber 27 is connected to each component. In this embodiment, the battery simulation chamber is for simulating the cooling of the battery by the air conditioning system, rather than for powering each component. Also, the battery is cooled by connecting the pipeline between the first water heat exchange area 23 and the battery simulation chamber 27 (when the vehicle is running, after the battery temperature rises to a certain level, it also requires the air conditioning system to cool it), but not limited thereto.

[0083] In a preferred embodiment, it further includes a coolant pipeline placed from the second water heat exchange area 24 to the air conditioning box chamber 25, which is used to achieve the heating effect on the air conditioning box in this set of systems. Moreover, the opening of the heating mode needs to be adjusted by a water valve 34, that is, when passing through the air conditioning box chamber 25, it does not pass through the front-end condensation module 26, but not limited thereto.

[0084] The present utility model is directed to an automotive air conditioning system based on R290 refrigerant, and there is an integrated modular development trend on the refrigerant side. Regarding the transformation problems of existing traditional refrigerant test chambers such as R134a: high transformation cost, long replacement time, etc., and the solution proposed by the present utility model: on the basis of the existing enthalpy difference test chamber, only the refrigerant side is transformed into an independent explosion-proof chamber, which can significantly reduce the total transformation cost of the R290 explosion-proof test chamber. This utility model proposes an innovative method of local transformation on the basis of the existing test chamber. In view of the characteristics of R290 refrigerant, the explosion-proof design on the refrigerant side is optimized, thereby effectively reducing the overall transformation cost and shortening the replacement cycle (replacement: 1. The traditional test chamber becomes an explosion-proof test chamber. 2. The integrated module explosion-proof test chamber adds new functions), and it has good practicability and market prospects.

[0085] Based on the design of the existing automotive air conditioning system test chamber, the present utility model proposes a design scheme of designing an independent integrated module explosion-proof chamber on the refrigerant side on the original basis. This design scheme mainly consists of two parts: the original test chamber and the integrated module explosion-proof treatment chamber.

[0086] The key innovation point of the present utility model: Design an independent integrated module explosion-proof chamber on the refrigerant side on the basis of the existing test chamber.

[0087] Components of the test room in this utility model: The original test room includes standard facilities such as gas cylinder room, condensation module, evaporation room (gas cylinder room, front-end condensation module, water heat exchange area, evaporation room, 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 (refrigerant side integrated modules are placed indoors, and modules are optional).

[0088] Explosion-proof design in the utility model: 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 utility model: 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 operates 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 with 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 utility model: 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 utility model are as follows: Refrigerant integration module: compressor, water-cooled condenser, evaporator (water-cooled), chiller (optional), valve parts (expansion valve, solenoid valve, etc. are optional), wire harness box (including strong and weak wire harnesses), pipeline / flow channel plate, connection bracket. An independent gas cylinder room needs to be set up, and the room is made of fireproof and explosion-proof materials, and a pressure relief surface is set in the room. Ventilation channel: It consists of an independent air duct, ventilation unit, exhaust door, and air intake door. Its air supply and exhaust systems adopt explosion-proof ventilation equipment. The opening of the ventilation channel is associated with a gas detector and an air pressure sensor. When a leakage situation / pressure increase situation is detected, the ventilation duct opens. Ventilation duct: The air inlet is at the top and the exhaust outlet is at the bottom. Pressure relief window, similar to the explosion-proof test chamber. Since it is set in the independent explosion-proof compartment of the integration module and its space position is small, while the original explosion-proof test chamber has a large space. When the ventilation channel fails to function, in the initial stage of leakage, the pressure increase is not obvious. The small space position of this independent explosion-proof compartment can be more sensitive to leakage. At the same time, when an explosion occurs inside, as the explosion point, the explosion direction is: from the pressure relief window into the exhaust channel. The pressure relief window is placed in the ventilation channel, and the strategy is: when a leakage is detected, the ventilation channel starts to exhaust air, and the pressure relief window relieves pressure. When the ventilation channel fails and abnormal pressure is detected, the pressure relief window relieves pressure. The preset pressure relief pressure data is 0.15 MPaA. When the indoor pressure reaches 0.15 MPaA, the pressure relief window automatically opens to release pressure and relieve the explosion. (Note: When this pressure is reached, it means that the leakage has been relatively serious.) Fixing parts are provided on the test piece fixing table, and the refrigerant integration module explosion-proof chamber is fixed through the fixing parts. Controller connection: audible and visual alarm, pressure sensor, gas detector, ventilation device, main power supply, monitor. An emergency alarm button is set at the operation room: an emergency stop operation button, audible and visual alarm and immediate exhaust, and report the alarm information.

[0092] The present utility model has stronger explosion-proof performance: It is provided with an independent explosion-proof compartment, which has a small space and high pressure sensitivity. Once a leakage occurs, it can be quickly detected and the ventilation and discharge can be started. It is equipped with an adjustable pressure relief window, which automatically releases pressure when the pressure reaches the preset value, greatly reducing the explosion risk. All the cable pipelines led out from the integration module are explosion-proof sealed, preventing leakage from spreading to the external environment.

[0093] The present utility model has more perfect intelligent monitoring: It integrates intelligent control measures such as gas detection, pressure sensing, and ventilation linkage to achieve comprehensive safety monitoring.

[0094] The present utility model has higher test efficiency: The refrigerant integration module is independently set in the explosion-proof compartment, which is convenient for maintenance and debugging, improving the test efficiency. The preset pressure value of the pressure relief window can be flexibly adjusted according to the pressure characteristics of different refrigerants.

[0095] This utility model has stronger expandability: It can be upgraded and transformed on the basis of the existing laboratory without reconstructing the entire test site, greatly reducing the investment cost. The explosion-proof chamber is small in size and limited in occupied space, making it convenient to be integrated into the test facilities in different scenarios.

[0096] The transformation cost of this utility model is lower than that of traditional laboratories: There is no need to reconstruct the entire test site. By upgrading and transforming on the existing basis, the investment cost can be greatly reduced.

[0097] This utility model has a short replacement time: The explosion-proof chamber is small in size, and the installation and commissioning period is short, making it convenient to quickly upgrade and replace according to requirements.

[0098] The explosion hazard of this utility model is low: When the micro explosion-proof chamber explodes, only the explosion of this small chamber is involved, and the harm to the external laboratory is small.

[0099] In summary, the design scheme of this explosion-proof laboratory has the advantages of safety, intelligence, economy, flexibility, etc., and is more suitable for test verification under the trend of the R290 integrated module of automotive air conditioners compared with the traditional scheme.

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

[0101] 1. General explosion-proof design. The explosion-proof technical measures such as combustible gas detection and explosion venting windows proposed in this patent are applicable to the test environments of various flammable and explosive refrigerants. These general explosion-proof designs can be flexibly applied to laboratories of different models and scales to meet the safety test requirements of different refrigerants.

[0102] 2. Standardized transformation plan. The patent designs a standardized explosion-proof chamber transformation plan, including key steps such as layout optimization and installation of protection devices. This plan can be replicated and promoted to other laboratories, eliminating the need for new design each time, and greatly reducing the transformation cost and time.

[0103] The explosion-proof measures of this utility model have wide applicability. They can not only be applied to R290 refrigerant, but also be extended to the laboratory transformation of other flammable and explosive refrigerants, providing a safe and reliable test environment for technological innovation in the refrigeration industry.

[0104] This utility model also provides a usage method of an explosion-proof test chamber. Using the above explosion-proof test chamber, it includes the following steps:

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

[0106] S120. Inject the test refrigerant into the test air-conditioning system 4 through the refrigerant switch interface 13.

[0107] S130. Pass the pipelines of the evaporator 42 and the condenser 44 of the test air-conditioning system 4 through the first explosion-proof chamber 1 respectively and connect them to the first water heat exchange area 23 and the second water heat exchange area 24 correspondingly.

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

[0109] S150. When it is detected that the test refrigerant leaks in the first explosion-proof chamber 1, the ventilation duct starts to exhaust air, and the explosion vent window relieves pressure. When a failure occurs in the ventilation duct and it is detected that the pressure in the first explosion-proof chamber 1 exceeds the preset range, the explosion vent window relieves pressure. The related technical features are as shown above and will not be elaborated here.

[0110] Technical problems that the present utility model can solve:

[0111] (1) Local explosion-proof transformation:

[0112] The cost of comprehensively transforming the entire test chamber into an explosion-proof test chamber is relatively high. A local explosion-proof transformation method can be adopted. For the key areas of R290 refrigerant performance testing, such as the refrigerant integration module, etc., special explosion-proof treatments are carried out, including using anti-static materials, combustible gas detection, etc. This local explosion-proof transformation can make the best use of the original infrastructure of the test chamber and greatly reduce the transformation cost.

[0113] (2) Independent explosion-proof of the refrigerant integration module:

[0114] The R290 air-conditioning system for automobiles usually adopts secondary water heat exchange, and the integration module on the refrigerant side can be independently placed in a small explosion-proof chamber. Special leakage detection and explosion-proof designs are carried out for this small explosion-proof chamber, 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 on the key parts and reduces the transformation requirements for the entire test chamber.

[0115] (3) Optimization of the test process:

[0116] On the basis of the local explosion-proof transformation, the test process can be further optimized to minimize the exposure time of the R290 refrigerant integration module in the test chamber. For example, for the preset integration module, only its water circuit needs to be externally connected to the water pipe side of the small chamber. 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 chamber is further reduced through process optimization, and the safety is improved.

[0117] In summary, through measures such as local explosion-proof transformation, independent explosion-proof of the refrigerant integration module, and optimization of the test process, it is possible to meet the explosion-proof requirements for the performance testing of R290 refrigerant while retaining the original laboratory infrastructure, significantly reducing the transformation cost, and providing more economical and efficient support for the innovation of automotive thermal management technology.

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

[0119] In view of the relatively low explosion limit of R290, the following technical requirements need to be met in its performance test 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 a safety ventilation system, explosion-proof equipment, a fire alarm system, an automatic gas detection device, etc. Laboratory operators need to receive specialized training to understand how to correctly handle flammable and explosive gases, prevent fires, and respond to emergencies.

[0121] Gas leakage detection and control: In order to ensure that the concentration of R290 in the laboratory remains within a safe range, precise and sensitive gas leakage detection equipment needs to be installed. These devices can detect the leakage of R290 in a timely manner and trigger an alarm or take automatic protection measures. In addition, the laboratory also needs to establish effective leakage control measures, such as a gas leakage alarm system, sealing equipment, and safety valves.

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

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

[0124] In summary, the explosion-proof test chamber of the present utility model can provide effective safety measures to avoid potential explosion risks. The integrated module filled with refrigerant is separately explosion-proof, and it has the advantages of safety, intelligence, economy, and flexibility. Compared with the traditional solution, it is more suitable for the test verification under the trend of the R290 integrated module for automotive air conditioners.

[0125] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present utility model.

Claims

1. An explosion-proof test chamber, characterized in that, Comprising: An environmental chamber (2), within which there are provided a first water heat exchange area (23), a second water heat exchange area (24), an air handling unit chamber (25), and a front-end condensation module (26). The first water heat exchange area (23) is connected to the air handling unit chamber (25) through pipelines, and the second water heat exchange area (24) is connected to the front-end condensation module (26) through pipelines. A first explosion-proof chamber (1), arranged within the environmental chamber (2). The inner cavity of the first explosion-proof chamber (1) houses a test air-conditioning system (4) for testing refrigerant in operation, and is provided with a blast vent, several sensors, 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 blast vent is arranged at the air outlet (18).

2. The explosion-proof test chamber according to claim 1, wherein, It further includes a second explosion-proof chamber (3), arranged outside the environmental chamber (2). The second explosion-proof chamber (3) houses a test refrigerant container inside, 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, wherein, The second explosion-proof chamber (3) has a second explosion-proof wall (31) and a second explosion-proof door (32).

4. The explosion-proof test chamber according to claim 1, wherein, Inside the inner cavity of the first explosion-proof chamber (1), there are respectively provided 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) includes 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 chamber (2) is divided into a test sub-chamber (21) and a crew sub-chamber (22) that only houses the air handling unit chamber (25).

7. The explosion-proof test chamber according to claim 1, wherein The test air-conditioning system (4) further includes a compressor (41) and a throttle valve (43). The compressor (41) is respectively connected to the evaporator (42) and the condenser (44), and the evaporator (42) is connected to the condenser (44) through the throttle valve (43).

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

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

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