Fresh air conditioning system for high-altitude environment simulation laboratory

Abstract

This utility model discloses a fresh air conditioning system for a high-altitude environment simulation laboratory, comprising: a fresh air unit with its fresh air duct connected to the side wall of the high-altitude environment simulation laboratory; a fresh air shut-off valve installed on the fresh air duct; and a pressure sensor arranged within the high-altitude environment simulation laboratory, which triggers an electrical signal when the pressure reaches different specified thresholds, causing the fresh air shut-off valve to perform shut-off or open operation. This utility model can provide a wide range of altitude adjustment and can also avoid the danger to personnel safety caused by sudden pressure changes in the altitude chamber.

Description

Technical Field

[0001] This utility model relates to the field of environmental simulation and control technology, and in particular to a fresh air conditioning system for a high-altitude environmental simulation laboratory. Background Technology

[0002] High-altitude environments are also common driving areas for automobiles. As altitude increases, environmental parameters change, primarily including decreased atmospheric pressure, reduced air density, and lower oxygen content. This causes vehicles to exhibit different characteristics when operating at high altitudes compared to those at low altitudes. With the rapid advancement of automotive technology and the expansion of the international market, vehicles undergo various environmental tests before leaving the factory, such as in frigid regions, extremely hot regions, and high-altitude areas. To save product development and testing time and reduce testing costs, major automotive research institutions and testing organizations are planning and constructing altitude-environment chambers.

[0003] When a car is tested in an altitude chamber, it needs to exhaust its exhaust fumes while simultaneously replenishing a certain amount of fresh air. Current altitude simulation laboratories operate within a range of 0–5500m; the design of the fresh air ductwork must consider the practicality of this altitude range, requiring a wide adjustment range. Simultaneously, personnel safety must be considered to prevent sudden pressure changes within the altitude chamber caused by the fresh air system, which could pose a danger to personnel.

[0004] Therefore, there is an urgent need for a fresh air conditioning system for high-altitude environment simulation laboratories that can provide a wide range of sea level regulation and avoid the danger to personnel safety caused by sudden pressure changes in the altitude chamber. Utility Model Content

[0005] The utility model description section introduces a series of simplified concepts, all of which are simplifications of existing technologies in the field, and will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] The technical problem to be solved by this utility model is to provide a fresh air conditioning system for a high-altitude environment simulation laboratory that can provide a wide range of sea level regulation and avoid the danger to personnel safety caused by sudden pressure changes in the altitude chamber.

[0007] To solve the above-mentioned technical problems, the present invention provides a fresh air conditioning system for a high-altitude environment simulation laboratory, comprising:

[0008] Fresh air unit 2, whose fresh air duct is connected to the side wall of high-altitude environment simulation laboratory 1;

[0009] Fresh air shut-off valve 3 is installed on the fresh air duct;

[0010] Pressure sensor 4 is located in high-altitude environment simulation test chamber 1. When the pressure reaches different specified thresholds, it triggers an electrical signal to cause fresh air shut-off valve 3 to perform shut-off or open operation.

[0011] Fresh air unit 2 delivers fresh, dry air to the high-altitude environment simulation test chamber 1. Fresh air system shut-off valve 3 is used to disconnect the test chamber from the external environment. Because the simulated environment inside the test chamber is at high altitude, it is a negative pressure zone relative to the external environment. When a malfunction occurs in the laboratory, the altitude extraction system stops operating, failing to maintain a constant pressure inside the test chamber. Outside air will then enter the test chamber through the fresh air system, causing a sharp increase in pressure. At this point, pressure sensor 4 sends a trigger signal to shut off the fresh air supply through fresh air shut-off valve 3, preventing the rapid change in altitude from affecting the safety of personnel inside the test chamber and maintaining a constant pressure.

[0012] Preferably, the improved high-altitude environment simulation laboratory fresh air conditioning system further includes:

[0013] Fresh air volume regulating valve 5 is arranged on the fresh air duct upstream of fresh air shut-off valve 3 and is used to regulate the amount of fresh air entering the test chamber.

[0014] Air flow meter 6 is arranged on the fresh air duct between fresh air shut-off valve 3 and fresh air volume regulating valve 5. It is used to measure the air volume at the air outlet of fresh air unit 2 and feed it back to fresh air unit 2. Fresh air unit 2 controls the amount of fresh air entering the laboratory in a closed loop based on the detection value of air flow meter 6.

[0015] Preferably, the improved high-altitude environment simulation laboratory fresh air conditioning system further includes:

[0016] Bypass pipe 7 is connected between the air supply outlet and air inlet of fresh air unit 2;

[0017] The bypass ventilation valve 8 is located on the bypass pipe 7.

[0018] The bypass duct 7 and the bypass ventilation valve 8 work together to perform two functions: 1. When the fresh air shut-off valve 3 is closed, the fresh air fan cannot shut off instantly, leading to excessive pressure in the fresh air duct and fresh air handling unit, causing damage to the duct and unit. The bypass ventilation valve 8 has a minimum opening, so when the fresh air shut-off valve 3 closes instantly, the fresh air handling unit can form a closed loop through the bypass duct; 2. When the fresh air volume regulating valve 5 suddenly increases, the fresh air fan cannot provide a large fresh air volume instantly, causing a momentary negative pressure in the fresh air duct and fresh air handling unit. At this time, the fresh air volume can be compensated by the fresh air duct and the bypass ventilation valve 8.

[0019] Preferably, the improved high-altitude environment simulation laboratory fresh air conditioning system further includes: the fresh air shut-off valve 3 is a pneumatic shut-off valve, which is characterized by being able to shut off the pipeline in a very short time.

[0020] Preferably, the improved high-altitude environment simulation laboratory fresh air conditioning system further includes:

[0021] Differential pressure sensor 9 is arranged on the fresh air duct upstream of fresh air volume regulating valve 5. It is used to measure the pressure of the fresh air duct and feed it back to the fresh air unit 2. By adjusting the air volume of the fresh air fan, the pressure upstream of the fresh air volume regulating valve 5 is kept constant, and the air volume regulation of the fresh air volume regulating valve 5 is more stable.

[0022] Preferably, the improved high-altitude environment simulation laboratory fresh air conditioning system further includes:

[0023] The small fresh air volume regulating valve 10 is connected in parallel with the fresh air volume regulating valve 5. Since the altitude simulation adjustment range in the test chamber is relatively wide, when the pressure difference before and after the fresh air volume regulating valve 5 is too large, the adjustment accuracy of the fresh air volume regulating valve 4 cannot meet the requirements. At this time, the fresh air volume entering the test chamber is adjusted by adjusting the small fresh air volume regulating valve 10. The "small fresh air volume" mentioned here refers to the fact that the air volume adjustment range of the small fresh air volume regulating valve is smaller than that of the fresh air volume regulating valve 5.

[0024] The altitude of the high-altitude environment simulation laboratory is achieved by using an altitude-controlled fan to extract air, creating a negative pressure zone compared to the external environment. This invention utilizes a fresh air control system comprised of a fresh air shut-off valve, a pressure sensor 4, a fresh air volume regulating valve 5, an air flow meter 6, a bypass pipe 7, a bypass ventilation valve 8, and a small fresh air volume regulating valve 10. This system provides a wide range of altitude adjustment while preventing sudden pressure changes within the altitude chamber from posing a safety hazard to personnel. Attached Figure Description

[0025] The accompanying drawings are intended to illustrate the general characteristics of the methods, structures, and / or materials used in specific exemplary embodiments of the present invention, supplementing the description in the specification. However, these drawings are schematic diagrams not drawn to scale and may not accurately reflect the precise structural or performance characteristics of any of the given embodiments. The drawings should not be construed as limiting or restricting the range of numerical values ​​or properties covered by the exemplary embodiments of the present invention. The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0026] Figure 1 This is a schematic diagram of the structure of the first embodiment of this utility model.

[0027] Figure 2 This is a schematic diagram of the structure of the second embodiment of this utility model.

[0028] Figure 3 This is a schematic diagram of the third embodiment of the present invention.

[0029] Figure 4 This is a schematic diagram of the fourth embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures

[0031] High Altitude Environment Simulation Laboratory 1

[0032] Fresh air unit 2

[0033] Fresh air shut-off valve 3

[0034] Pressure sensor 4

[0035] Fresh air volume regulating valve 5

[0036] Air flow meter 6

[0037] Bypass pipe 7

[0038] Bypass ventilation valve 8

[0039] Differential pressure sensor 9

[0040] Xiaoxin air volume regulating valve 10

[0041] Altitude system shut-off valve 11

[0042] Altitude wind turbine 12. Detailed Implementation

[0043] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can fully understand other advantages and technical effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through different specific embodiments, and various details in this specification can also be applied based on different viewpoints, with various modifications or changes made without departing from the overall design concept of the utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. The following exemplary embodiments of this utility model can be implemented in many different forms and should not be construed as limited to the specific embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of this utility model thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art. It should be understood that when an element is referred to as "connected" or "combined" to another element, the element can be directly connected or combined to the other element, or there may be intermediate elements. The difference is that when an element is referred to as "directly connected" or "directly combined" to another element, there are no intermediate elements. Throughout the drawings, the same reference numerals always denote the same elements.

[0044] First embodiment;

[0045] refer to Figure 1 As shown, this utility model provides a fresh air conditioning system for a high-altitude environment simulation laboratory, comprising:

[0046] Fresh air unit 2, whose fresh air duct is connected to the side wall of high-altitude environment simulation laboratory 1;

[0047] Fresh air shut-off valve 3 is installed on the fresh air duct and is a pneumatic shut-off valve;

[0048] Pressure sensor 4 is located in high-altitude environment simulation test chamber 1. When the pressure reaches different specified thresholds, it triggers an electrical signal to cause fresh air shut-off valve 3 to perform shut-off or open operation.

[0049] Second embodiment;

[0050] refer to Figure 2 As shown, this utility model provides a fresh air conditioning system for a high-altitude environment simulation laboratory, comprising:

[0051] Fresh air unit 2, whose fresh air duct is connected to the side wall of high-altitude environment simulation laboratory 1;

[0052] Fresh air shut-off valve 3 is installed on the fresh air duct and is a pneumatic shut-off valve;

[0053] Pressure sensor 4 is located in high-altitude environment simulation test chamber 1. When the pressure reaches different specified thresholds, it triggers an electrical signal to cause fresh air shut-off valve 3 to perform shut-off or open-off operations.

[0054] Fresh air volume regulating valve 5 is arranged on the fresh air duct upstream of fresh air shut-off valve 3 and is used to regulate the amount of fresh air entering the test chamber.

[0055] Air flow meter 6 is arranged on the fresh air duct between fresh air shut-off valve 3 and fresh air volume regulating valve 5. It is used to measure the air volume at the air outlet of fresh air unit 2 and feed it back to fresh air unit 2.

[0056] Third embodiment;

[0057] refer to Figure 3 As shown, this utility model provides a fresh air conditioning system for a high-altitude environment simulation laboratory, comprising:

[0058] Fresh air unit 2, whose fresh air duct is connected to the side wall of high-altitude environment simulation laboratory 1;

[0059] Fresh air shut-off valve 3 is installed on the fresh air duct and is a pneumatic shut-off valve;

[0060] Pressure sensor 4 is located in high-altitude environment simulation test chamber 1. When the pressure reaches different specified thresholds, it triggers an electrical signal to cause fresh air shut-off valve 3 to perform shut-off or open operation.

[0061] Fresh air volume regulating valve 5 is arranged on the fresh air duct upstream of fresh air shut-off valve 3 and is used to regulate the amount of fresh air entering the test chamber.

[0062] Air flow meter 6 is arranged on the fresh air duct between fresh air shut-off valve 3 and fresh air volume regulating valve 5. It is used to measure the air volume at the air outlet of fresh air unit 2 and feed it back to fresh air unit 2.

[0063] Bypass pipe 7 is connected between the air supply outlet and air inlet of fresh air unit 2;

[0064] The bypass ventilation valve 8 is located on the bypass pipe 7.

[0065] Fourth embodiment;

[0066] refer to Figure 4 As shown, this utility model provides a fresh air conditioning system for a high-altitude environment simulation laboratory, comprising:

[0067] Fresh air unit 2, whose fresh air duct is connected to the side wall of high-altitude environment simulation laboratory 1;

[0068] Fresh air shut-off valve 3 is installed on the fresh air duct and is a pneumatic shut-off valve;

[0069] Pressure sensor 4 is located in high-altitude environment simulation test chamber 1. When the pressure reaches different specified thresholds, it triggers an electrical signal to cause fresh air shut-off valve 3 to perform shut-off or open operation.

[0070] Fresh air volume regulating valve 5 is arranged on the fresh air duct upstream of fresh air shut-off valve 3 and is used to regulate the amount of fresh air entering the test chamber.

[0071] Air flow meter 6 is arranged on the fresh air duct between fresh air shut-off valve 3 and fresh air volume regulating valve 5. It is used to measure the air volume at the air outlet of fresh air unit 2 and feed it back to fresh air unit 2.

[0072] Bypass pipe 7 is connected between the air supply outlet and air inlet of fresh air unit 2;

[0073] A bypass ventilation valve 8 is arranged on the bypass pipe 7;

[0074] Differential pressure sensor 9 is arranged on the fresh air duct at the front end of fresh air volume regulating valve 5, and is used to measure the pressure of fresh air duct and feed it back to fresh air unit 2.

[0075] The small fresh air volume regulating valve 10 is connected in parallel with the fresh air volume regulating valve 5;

[0076] Altitude system shut-off valve 11 is connected to the side wall of high altitude environment simulation test chamber 1 via a pipeline;

[0077] Altitude fan 12 is connected to the pipeline at the rear end of altitude system shut-off valve 11.

[0078] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It will also be understood that, unless expressly defined herein, terms such as those defined in a general dictionary shall be interpreted as having the meaning consistent with their meaning in the relevant field context, and not as having an idealized or overly formal meaning.

[0079] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the present invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A fresh air conditioning system for a high altitude environment simulation laboratory, characterized in that, include: The fresh air unit (2) has its fresh air duct connected to the side wall of the high-altitude environment simulation test chamber (1); Fresh air shut-off valve (3) is installed on the fresh air duct; The pressure sensor (4) is placed in the high-altitude environment simulation test chamber (1). When the pressure reaches different specified thresholds, it triggers an electrical signal to make the fresh air shut-off valve (3) perform a shut-off or opening operation.

2. The fresh air conditioning system for high altitude environment simulation test chamber according to claim 1, characterized in that, Also includes: The fresh air volume regulating valve (5) is arranged on the fresh air duct at the front end of the fresh air shut-off valve (3) and is used to regulate the fresh air volume entering the test chamber. An air flow meter (6) is arranged on the fresh air duct between the fresh air shut-off valve (3) and the fresh air volume regulating valve (5). It is used to measure the air volume of the fresh air unit (2) supply outlet and feed it back to the fresh air unit (2).

3. The fresh air conditioning system for high altitude environment simulation test chamber according to claim 1, characterized in that, Also includes: Bypass pipe (7) is used to connect between the air supply port and air inlet of the fresh air unit (2); A bypass ventilation valve (8) is arranged on the bypass pipe (7).

4. The fresh air conditioning system for high altitude environment simulation test chamber according to claim 1, characterized in that, Also includes: The fresh air shut-off valve (3) is a pneumatic shut-off valve.

5. The fresh air conditioning system for high altitude environment simulation test chamber according to claim 1, wherein, Also includes: A differential pressure sensor (9) is arranged on the fresh air duct at the front end of the fresh air volume regulating valve (5) and is used to measure the pressure of the fresh air duct and feed it back to the fresh air unit (2).

6. The fresh air conditioning system for high altitude environment simulation test chamber according to claim 1, wherein, Also includes: The small fresh air volume regulating valve (10) is connected in parallel with the fresh air volume regulating valve (5).

7. The high altitude environment simulation test chamber fresh air conditioning system of claim 1, wherein, Also includes: Altitude system shut-off valve (11) is connected to the side wall of high altitude environment simulation test chamber (1) via pipeline; An altitude fan (12) is connected to the pipeline at the rear end of the altitude system shut-off valve (11).

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