Novel low-pressure animal experiment cabin

Abstract

The utility model provides a novel low-pressure animal experiment cabin. The novel low-pressure animal experiment cabin comprises a vacuum pump, a joint, an electromagnetic valve, a cabin body, a mass flow controller, an electric control valve and a control system, the vacuum pump is connected with the electromagnetic valve through a joint; the electromagnetic valve is connected with the cabin body; the electric control valve is connected with the cabin body and is used for primarily adjusting the pressure balance in the cabin body; the mass flow controller is connected with the cabin body and is used for accurately adjusting the pressure balance in the cabin body; the control system is connected with the vacuum pump, the electromagnetic valve, the mass flow controller and the electric adjusting valve and used for controlling the vacuum pump, the electromagnetic valve, the mass flow controller and the electric adjusting valve to be switched on and off. The control system is a PLC (Programmable Logic Controller); the number of the vacuum pumps is two; a filter is arranged between the electromagnetic valve and the cabin body; in the operation process, the stability of dynamic balance air pressure in the cabin body can be guaranteed, and the air pressure in the cabin body can be controlled in a high-precision mode.

Description

Technical Field

[0001] This utility model belongs to the field of low-pressure chambers, specifically relating to a novel low-pressure animal experimental chamber. Background Technology

[0002] A hypobaric chamber is a ground-based device that artificially simulates low-pressure and hypoxic high-altitude environments. Hypobaric chambers have numerous applications, primarily in aerospace, basic research, medical treatment, sports training, and high-altitude acclimatization. These are small, not completely sealed chambers that rely on a vacuum system to create a low-pressure, hypoxic state. The pressure can be adjusted to simulate "high-altitude" pressures of several thousand or even tens of thousands of meters as needed. Mountaineers can have their hypoxia tolerance tested by spending time in a hypobaric chamber, thus determining their altitude-climbing ability. In general, hypobaric chambers can also be used to train hypoxia tolerance. Hypobaric animal testing chambers are one type of simulation device used to cultivate or model experimental animals in high-altitude, low-pressure environments; however, current hypobaric animal testing chambers are difficult to control with high precision. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this invention is to provide a low-pressure animal experimental chamber that can precisely control the pressure inside the chamber.

[0004] This utility model is achieved through the following technical solution:

[0005] A novel low-pressure animal experimental chamber includes a vacuum pump, a connector, a solenoid valve, a chamber body, a mass flow controller, an electric regulating valve, and a control system. The vacuum pump is connected to one end of the solenoid valve via the connector, and the other end of the solenoid valve is connected to the chamber body. The electric regulating valve is connected to the chamber body for preliminary adjustment of the internal pressure balance. The mass flow controller is connected to the chamber body for precise adjustment of the internal pressure balance. The control system is connected to the vacuum pump, solenoid valve, mass flow controller, and electric regulating valve respectively, and is used to control these components. The control system is a PLC. There are two vacuum pumps. A filter is installed between the solenoid valve and the chamber body.

[0006] The beneficial effects of this utility model are:

[0007] This invention can ensure the stability of the dynamic balance air pressure inside the cabin during operation and can control the air pressure inside the cabin with high precision. Attached Figure Description

[0008] The present invention will now be described in further detail with reference to the accompanying drawings.

[0009] Figure 1 This is a schematic diagram of the structure of this utility model.

[0010] In the diagram: 1—vacuum pump; 2—connector; 3—solenoid valve; 4—filter; 5—chamber; 6—mass flow controller; 7—electric regulating valve. Detailed Implementation

[0011] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0012] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0013] In the description of this utility model, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. It should be noted that the terms "comprising," "including," or any other variations are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0014] like Figure 1 The novel low-pressure animal experimental chamber shown includes: a vacuum pump 1, a connector 2, a solenoid valve 3, a filter 4, a chamber body 5, a mass flow controller 6, an electric regulating valve 7, and a control system.

[0015] The vacuum pump 1 is connected to one end of the solenoid valve 3 via connector 2; there are two vacuum pumps 1; in order to achieve long-term operation, the two vacuum pumps 1 are used in a standby mode; therefore, the vacuum pump 1 is installed in the cabinet, which is equipped with a cooling fan, control circuit and connecting pipes, and auxiliary materials such as sound insulation cotton are also installed in the cabinet.

[0016] The other end of the solenoid valve 3 is connected to the chamber 5; a filter 4 is provided between the solenoid valve 3 and the chamber 5. The filter 4 is a vacuum filter that filters impurities in the pipeline and provides a good working environment for the vacuum pump 1.

[0017] The electric regulating valve 7 is connected to the chamber 5 and is used for preliminary adjustment of the internal pressure balance of the chamber 5. The mass flow controller 6 is connected to the chamber 5 and is used for precise adjustment of the internal pressure balance of the chamber 5.

[0018] The cabin is made of transparent plexiglass and is equipped with a quick-opening outward door.

[0019] The control system is connected to the vacuum pump 1, solenoid valve 3, mass flow controller 6, and electric regulating valve 7, and is used to control the switching of the vacuum pump 1, solenoid valve 3, mass flow controller 6, and electric regulating valve 7. The control system is a PLC. The control system can collect signals in real time, compare them with set values, and dynamically calculate the operating frequency of the vacuum pump 1, the opening value of the electric regulating valve 7, and the flow opening of the mass flow controller 6 through a specific PID calculation formula. The control values ​​are input and real-time data is displayed on the touch screen of the control system.

[0020] All the above-mentioned connecting pipes are PU tubing, which are connected to various components via quick-connect fittings.

[0021] The working principle of this utility model:

[0022] The required simulated height and fresh air volume values ​​are written into the control system. The control system compares the set values ​​with the actual values ​​and controls the opening and closing of vacuum pump 1, solenoid valve 3, mass flow controller 6, and electric regulating valve 7. To achieve long-term operation, the two vacuum pumps 1 in the vacuum unit operate in a one-on-one standby mode. When the set exchange time is reached, the control system controls vacuum pump 1 and solenoid valve 3 to exchange their operating states, instantly switching the operating states to ensure a stable and stable simulated environment within chamber 5. The control system takes real-time sensor measurements and compares them with the set values. Using a specific PID formula, it calculates the operating frequency of vacuum pump 1, the opening degree of electric regulating valve 3, and the flow opening degree of mass flow controller 6, respectively, collecting data in real time and dynamically adjusting the equipment's operating state. Due to the inherent characteristics of electric regulating valve 3 and mass flow controller 6, coarse adjustments are made to the dynamic balance of fresh air volume and pressure within chamber 5 through electric regulating valve 7. After the pressure reaches the operating conditions of mass flow controller 6, mass flow controller 6 is used to fine-tune the dynamic balance of fresh air volume and pressure within chamber 5, resulting in higher control accuracy of the simulated environment within chamber 5.

[0023] The scope of protection of this utility model is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this utility model shall fall under the protection of this utility model.

Claims

1. A novel low-pressure animal experimental chamber, characterized in that... The system includes a vacuum pump (1), a connector (2), a solenoid valve (3), a chamber (5), a mass flow controller (6), an electric regulating valve (7), and a control system. The vacuum pump (1) is connected to one end of the solenoid valve (3) via the connector (2), and the other end of the solenoid valve (3) is connected to the chamber (5). The electric regulating valve (7) is connected to the chamber (5) and is used to perform preliminary adjustment of the internal pressure balance of the chamber (5). The mass flow controller (6) is connected to the chamber (5) and is used to perform precise adjustment of the internal pressure balance of the chamber (5). The control system is connected to the vacuum pump (1), the solenoid valve (3), the mass flow controller (6), and the electric regulating valve (7) respectively, and is used to control the vacuum pump (1), the solenoid valve (3), the mass flow controller (6), and the electric regulating valve (7).

2. The novel low-pressure animal experimental chamber according to claim 1, characterized in that... The control system is a PLC.

3. The novel low-pressure animal experimental chamber according to claim 1, characterized in that... The number of vacuum pumps (1) is two.

4. A novel low-pressure animal experimental chamber according to claim 1, characterized in that... A filter (4) is provided between the solenoid valve (3) and the cabin (5).

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