A cold and hot cycle test equipment under extremely cold conditions in a vehicle test field

Abstract

The utility model discloses a kind of cold and hot cycle test equipment under extremely cold condition of automobile test field, including sealed test cabin, inside the cabin that can accommodate whole car is formed;Refrigeration mechanism is connected with the evaporator inside sealed test cabin;Heating mechanism is used to promote the temperature in storehouse, and refrigeration mechanism is complementary to form cold and hot cycle system;Fresh air and exhaust system are used to introduce external fresh air and discharge cabin exhaust gas in specific test stage;Central control system is integrated with PLC and touch screen.The utility model of a kind of cold and hot cycle test equipment under extremely cold condition of automobile test field greatly improves test efficiency: get rid of the complete dependence on natural climate, can test at any time needed, shorten natural exposure test to several weeks, which can be completed in several months;Test condition is highly controllable and repeatable: the rate of temperature change, high temperature and holding time can be accurately controlled, ensure the consistency and scientificity of test data.

Description

Technical Field

[0001] This utility model relates to the field of automotive performance testing technology, and in particular to a cold and hot cycle testing device under extreme cold conditions at an automotive testing ground. Background Technology

[0002] Based on application scenarios and functional requirements, thermal cycling equipment is mainly divided into four categories: high and low temperature exchangers, integrated thermal and cold water systems, industrial-grade chillers, and reliability testing equipment. All of these are centered on temperature control and meet the experimental and production needs of different fields. Thermal cycling equipment commonly used in winter automotive proving grounds must meet low-temperature testing requirements, and the following types are mainly selected: low-temperature cold-zone thermal cycling shock chambers, high and low temperature cycling machines, and high and low temperature cooling testing machines, etc., to provide precise temperature control for the proving ground.

[0003] In test sites operating under extremely cold conditions, some auxiliary equipment for heating and cooling is used, but the main reliance is still on natural climate conditions, which falls far short of the testing requirements. This approach has the following drawbacks: First, it is entirely dependent on natural weather, limiting the testing window and making it impossible to proceed as planned, leading to extended development cycles and low efficiency. Second, factors such as temperature, wind speed, and sunlight in the natural environment change rapidly, making it impossible to guarantee that the initial and process conditions are consistent for each test, resulting in poor comparability of test data and affecting problem analysis and improvement verification. Third, the temperature change process under natural conditions is slow, making it difficult to simulate the more severe rapid temperature alternation conditions that users may encounter in extremely cold regions.

[0004] Based on the aforementioned technical problems, those skilled in the art urgently need to develop a cold and hot circulation device for automotive testing grounds under extremely cold conditions, capable of creating an independent, controllable, and rapidly temperature-cycled environment. Utility Model Content

[0005] The purpose of this invention is to provide a cold and hot cycling device that can be integrated into an automotive testing ground and rapidly construct a controllable temperature cycle in extremely cold natural environments, so as to achieve efficient and high-intensity weather resistance testing of vehicles and components.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model discloses a thermal cycling test equipment for automotive test tracks under extreme cold conditions, the thermal cycling equipment comprising:

[0008] The sealed test chamber has an interior that can accommodate the entire vehicle.

[0009] The cabin door can be opened and closed quickly to isolate it from the extreme cold environment during testing;

[0010] The refrigeration mechanism is connected to the evaporator inside the sealed test chamber to cool the chamber.

[0011] The heating mechanism includes at least one fan-powered heating end for raising the temperature inside the chamber, thus forming a hot and cold circulation system in conjunction with the refrigeration mechanism;

[0012] The fresh air and exhaust system is used to introduce fresh outside air and exhaust exhaust gas from the cabin during specific testing phases.

[0013] The testing equipment also includes:

[0014] The central control system, which integrates a PLC and a touch screen, is used to preset and execute cold and hot cycle test programs and record temperature and humidity data inside the chamber.

[0015] An external frame, located on one side of the sealed test chamber, provides lateral support for the sealed test chamber and supports the wind-powered heating end of the heating mechanism.

[0016] Preferably, the walls of the sealed test chamber are configured as an inner and outer double-layer insulation structure.

[0017] Preferably, the inner layer of the sealed test chamber wall is made of glass fiber cotton material;

[0018] The outer layer of the sealed test chamber wall is made of rigid polyurethane foam.

[0019] Preferably, the refrigeration mechanism is a cascade refrigeration unit.

[0020] Furthermore, the heating mechanism includes an electric heater located at the bottom of the cabin, which is composed of multiple integrated electric heating plates;

[0021] A forced circulation fan is arranged on the external frame.

[0022] Furthermore, the sealed test chamber is equipped with multiple air outlets, namely two symmetrically arranged cooling air outlets, two symmetrically arranged heating air outlets, and two symmetrically arranged fresh air outlets.

[0023] Furthermore, the fresh air and exhaust system includes a wall-mounted fresh air system; and

[0024] The exhaust vents are located on the walls of the sealed test chamber.

[0025] Preferably, the top of the sealed test chamber is equipped with multiple lighting lamps;

[0026] Furthermore, the sealed test chamber is equipped with a main door on one or both sides, and the main door is a sealed double-leaf door structure or a sealed roller shutter door structure.

[0027] The above technical solution provides a thermal cycling testing device for automobiles under extremely cold conditions, which has the following beneficial effects:

[0028] This utility model provides a cold and hot cycle testing device for automobile test tracks under extreme cold conditions, which greatly improves testing efficiency: it eliminates the complete dependence on natural climate, and can conduct tests whenever needed, shortening natural exposure tests that would take months to complete to a few weeks.

[0029] The test conditions are highly controllable and repeatable: the rate of temperature change, high and low temperatures, and holding time can be precisely controlled, ensuring the consistency and scientific validity of the test data.

[0030] Enhanced testing: It can simulate temperature changes that are more severe and faster than in the natural environment, which helps to expose potential design flaws and reliability issues in vehicles in advance.

[0031] Reduced overall costs: Although there is an initial investment in the equipment, it greatly shortens the R&D cycle and the time that personnel spend on site, thereby reducing the overall R&D and verification costs.

[0032] Integration and flexibility: The equipment can be directly deployed in existing extreme cold test sites and used in conjunction with the roads, ramps and other facilities within the sites. It can be used to test the whole vehicle, or to test large assemblies such as battery packs and engines separately through adapters. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0034] Figure 1 A three-dimensional view of the overall structure of a cold and hot cycle testing device under extremely cold conditions at an automotive testing ground, provided as an embodiment of this utility model;

[0035] Figure 2 A schematic diagram of the internal structure of a thermal cycling test chamber under extremely cold conditions at an automotive test track, provided as an embodiment of this utility model;

[0036] Figure 3 A side view of the external frame of a cold and hot cycle testing device under extremely cold conditions at an automotive testing ground, provided as an embodiment of this utility model;

[0037] Figure 4 A partial cross-sectional view of a double-layer insulation structure for a cold and hot cycle testing device under extremely cold conditions at an automotive testing ground, provided as an embodiment of this utility model.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Sealed test chamber; 2. Chamber door; 3. Refrigeration mechanism; 4. Heating mechanism; 5. Fresh air and exhaust system; 6. External frame; 7. Refrigeration air outlet; 8. Heating air outlet; 9. Fresh air outlet; 11. Touch screen; 12. Lighting;

[0040] 101. Inner layer; 102. Outer layer;

[0041] 401. Electric heater; 402. Forced circulation fan;

[0042] 501. Wall-mounted fresh air system; 502. Exhaust vent. Detailed Implementation

[0043] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0044] See Figures 1-4 As shown;

[0045] This utility model discloses a thermal cycling test equipment for automotive test tracks under extreme cold conditions, the thermal cycling equipment comprising:

[0046] Sealed test chamber 1, the interior of which forms a compartment capable of accommodating the entire vehicle;

[0047] The second cabin door can be opened and closed quickly to isolate the cabin from the extreme cold environment during testing.

[0048] The refrigeration mechanism 3 is connected to the evaporator inside the sealed test chamber 1 to cool the chamber.

[0049] Heating mechanism 4 includes at least one fan-powered heating end for raising the temperature inside the chamber, and forms a hot and cold circulation system with the refrigeration mechanism 3;

[0050] The fresh air and exhaust system 5 is used to introduce fresh outside air and exhaust exhaust gas from the cabin during specific testing phases.

[0051] The testing equipment also includes:

[0052] The central control system, which integrates a PLC and a touch screen 11, is used to preset and execute cold and hot cycle test programs and record temperature and humidity data inside the chamber.

[0053] The external frame 6 is located on one side of the sealed test chamber 1, providing lateral support for the sealed test chamber 1 and bearing the wind-powered heating end of the heating mechanism 4.

[0054] As a preferred technical solution in this embodiment, the walls of the sealed test chamber 1 are configured as an inner and outer double-layer thermal insulation structure.

[0055] As a preferred technical solution in this embodiment, the inner layer 101 of the wall of the sealed test chamber 1 is made of glass fiber cotton material;

[0056] The outer layer 102 of the wall of the sealed test chamber 1 is made of rigid polyurethane foam. In this embodiment, the sealed test chamber 1 is designed to accommodate a mid-sized SUV, and the insulation layer thickness is 150mm to 230mm.

[0057] As a preferred technical solution in this embodiment, the refrigeration mechanism 3 adopts a cascade refrigeration unit. R404A refrigerant is used in the high-temperature stage, and R23 refrigerant is used in the low-temperature stage, ensuring that the lowest temperature inside the cabin can be stabilized at -55℃. Evaporators are distributed on both sides of the bottom of the cabin.

[0058] As a further description of this embodiment, the heating mechanism 4 includes an electric heater 401 disposed at the bottom of the cabin, and the electric heater 401 is composed of multiple integrated electric heating plates;

[0059] A forced circulation fan 402 is mounted on the outer frame 6. Specifically, the electric heater 401 uses stainless steel finned electric heating tubes arranged in a plate-like structure with a total power of 120kW. Together with the low-temperature resistant forced circulation fan 402, it ensures that the time for the temperature inside the chamber to rise from -55℃ to +60℃ does not exceed 60 minutes.

[0060] As a further description of this embodiment, the sealed test chamber 1 is provided with multiple air outlets, namely two symmetrically arranged cooling air outlets 7, two symmetrically arranged heating air outlets 8, and two symmetrically arranged fresh air outlets 9.

[0061] As a further description of this embodiment, the fresh air and exhaust system 5 includes a wall-mounted fresh air system 501; and

[0062] The exhaust vent 502 is located on the wall of the sealed test chamber 1.

[0063] As a preferred technical solution in this embodiment, the top of the sealed test chamber 1 is provided with a plurality of lighting lamps 12;

[0064] Furthermore, the sealed test chamber 1 is provided with the chamber door 2 on one or both sides, and the chamber door 2 is a sealed double door structure, a sealed roller shutter door structure, or an electric sliding type, with an inflatable sealing strip on the edge.

[0065] The central control system's PLC has preset various standard test cycles, such as a cycle program of "-40℃ to +85℃, holding for 2 hours each, with a transition time of less than 90 minutes." Operators only need to select the program and start it; the equipment will then run fully automatically, recording all temperature data and equipment status in the built-in memory. During testing, the vehicle is driven into the cabin, the necessary wiring harnesses are connected (if monitoring of vehicle interior data is required), and the cabin door is closed. The preset hot and cold cycle program is started on the control panel. The equipment will automatically complete the cycle of heating, holding, cooling, and then holding again, recording cabin environmental data and vehicle feedback data in real time.

[0066] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A thermal cycling testing device for automobiles under extreme cold conditions, characterized in that, The testing equipment includes: The sealed test chamber (1) has an interior that can accommodate the entire vehicle; The cabin door (2) can be opened and closed quickly to isolate it from the external extreme cold environment during testing; The refrigeration mechanism (3) is connected to the evaporator inside the sealed test chamber (1) to cool the chamber. Heating mechanism (4), which includes at least one wind-powered heating end for raising the temperature inside the chamber, and complements the refrigeration mechanism (3) to form a hot and cold circulation system; Fresh air and exhaust system (5) is used to introduce fresh air from outside and exhaust exhaust gas from the cabin during specific test phases; The testing equipment also includes: The central control system, which integrates a PLC and a touch screen (11), is used to preset and execute the hot and cold cycle test program and record the temperature and humidity data inside the chamber. An external frame (6) is located on one side of the sealed test chamber (1) to provide lateral support for the sealed test chamber (1) and to carry the wind-powered heating end of the heating mechanism (4).

2. The cold and hot cycling testing equipment for an automotive test track under extreme cold conditions according to claim 1, characterized in that, The walls of the sealed test chamber (1) are configured as an inner and outer double-layer insulation structure.

3. The cold and hot cycling testing equipment for an automotive test track under extremely cold conditions according to claim 2, characterized in that, The inner layer (101) of the wall of the sealed test chamber (1) is made of glass fiber cotton material; The outer layer (102) of the wall of the sealed test chamber (1) is made of rigid polyurethane foam.

4. The cold and hot cycling testing equipment for an automotive test track under extreme cold conditions according to claim 1, characterized in that, The refrigeration mechanism (3) adopts a cascade refrigeration unit.

5. The cold and hot cycling testing equipment for an automotive test track under extreme cold conditions according to claim 1, characterized in that, The heating mechanism (4) includes an electric heater (401) located at the bottom of the cabin, which is composed of multiple integrated electric heating plates; A forced circulation fan (402) is arranged on the outer frame (6).

6. The cold and hot cycling testing equipment for an automotive test track under extreme cold conditions according to claim 1, characterized in that, The sealed test chamber (1) is equipped with multiple air outlets, namely two symmetrically arranged cooling air outlets (7), two symmetrically arranged heating air outlets (8), and two symmetrically arranged fresh air outlets (9).

7. The cold and hot cycling testing equipment for an automotive test track under extreme cold conditions according to claim 1, characterized in that, The fresh air and exhaust system (5) includes a wall-mounted fresh air system (501); and The exhaust vent (502) is located on the wall of the sealed test chamber (1).

8. A cold and hot cycling testing device for an automobile testing ground under extreme cold conditions according to any one of claims 1 to 7, characterized in that, The top of the sealed test chamber (1) is equipped with multiple lighting lamps (12); The sealed test chamber (1) is provided with the chamber door (2) on one or both sides, and the chamber door (2) is a sealed double door structure or a sealed roller shutter door structure.

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