Novel low-pressure animal experiment cabin

Abstract

The invention 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 with high precision.

Description

Technical Field

[0001] The invention belongs to the field of low-pressure chambers, and in particular relates to a novel low-pressure animal experiment chamber. Background Art

[0002] A hypobaric chamber is a ground-based device that artificially simulates high-altitude environments such as low air pressure and hypoxia. It has many uses, primarily in aerospace, basic research, medical treatment, sports training, and altitude adaptation. The partially enclosed chamber relies on a vacuum device to create a low-pressure, hypoxic state within the chamber, and can be adjusted to simulate "high-altitude" air pressures of several thousand or even ten thousand meters as needed. Mountaineers can test their tolerance to hypoxia by spending time in the hypobaric chamber, thereby measuring their climbing ability. Generally, a hypobaric chamber can also be used as a means of training hypoxia tolerance. A hypobaric animal experimental chamber is one type of simulation equipment used to simulate high-altitude, low-pressure environments for the cultivation or modeling of experimental animals, but current hypobaric animal experimental chambers are difficult to control with high precision. Summary of the Invention

[0003] In view of the above problems, the object of the present invention is to provide a low-pressure animal experiment chamber that can control the pressure inside the chamber with high precision.

[0004] The present invention is achieved through the following technical solutions: A new type of low-pressure animal experiment cabin, including a vacuum pump, a connector, a solenoid valve, a cabin 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 through a connector, and the other end of the solenoid valve is connected to the cabin body; the electric regulating valve is connected to the cabin body for preliminary adjustment of the pressure balance inside the cabin body; the mass flow controller is connected to the cabin body for precise adjustment of the pressure balance inside the cabin body; the control system is respectively connected to the vacuum pump, solenoid valve, mass flow controller and electric regulating valve for controlling the vacuum pump, solenoid valve, mass flow controller and electric regulating valve; the control system is a PLC; there are two vacuum pumps; a filter is arranged between the solenoid valve and the cabin body.

[0005] Beneficial effects of the present invention: The present invention can ensure the stability of the dynamic equilibrium air pressure in the cabin during operation, and can control the air pressure in the cabin with high precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The present invention will be further described in detail below with reference to the accompanying drawings.

[0007] Figure 1 It is a structural schematic diagram of the present invention.

[0008] As shown in the figure: 1—vacuum pump; 2—connector; 3—solenoid valve; 4—filter; 5—cabin; 6—mass flow controller; 7—electric regulating valve. DETAILED DESCRIPTION

[0009] The following describes the implementation of the present invention through specific embodiments. People skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0010] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose of the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0011] In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. It should be noted that the terms "include", "comprise" or any other variants are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements that are inherent to such process, method, article or device.

[0012] like Figure 1 The novel low-pressure animal experiment 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.

[0013] The vacuum pump 1 is connected to one end of the solenoid valve 3 through a connector 2; there are two vacuum pumps 1; in order to achieve long-term working conditions, the two vacuum pumps 1 adopt a one-backup and one-use working mode; therefore, the vacuum pump 1 is installed in a cabinet, and a cooling fan, a control circuit and a connecting pipe are provided in the cabinet, and auxiliary materials such as sound insulation cotton are also provided in the cabinet.

[0014] The other end of the solenoid valve 3 is connected to the cabin 5; a filter 4 is provided between the solenoid valve 3 and the cabin 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.

[0015] The electric regulating valve 7 is connected to the cabin 5 and is used to perform preliminary adjustment on the pressure balance inside the cabin 1. The mass flow controller 6 is connected to the cabin 5 and is used to perform precise adjustment on the pressure balance inside the cabin 1.

[0016] The cabin is made of transparent plexiglass and is equipped with a quick-opening outward door.

[0017] 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, and is used to control the switching of the vacuum pump 1, the solenoid valve 3, the mass flow controller 6 and the electric regulating valve 7; the control system is a PLC; the control system can collect signals in real time, compare the set values, and dynamically calculate the operating frequency value 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, and input the control values ​​and display real-time data through the touch screen of the control system.

[0018] The above-mentioned connecting pipes are all PU pipes, and the various components are connected through quick-tighten joints.

[0019] Working principle of the present invention: The required simulated height value and fresh air volume value are written into the control system. The control system compares the set value with the actual value and controls the opening and closing of the vacuum pump 1, the solenoid valve 3, the mass flow controller 6 and the electric regulating valve 7. To achieve long-term working conditions, the two vacuum pumps 1 in the vacuum unit adopt a one-backup and one-use working mode. When the set exchange time is reached, the control system controls the vacuum pump 1 and the solenoid valve 3 to exchange working states, instantly switching working states to ensure that the simulated environment in the cabin 5 is stable and without fluctuations; the control system takes the sensor measurement values ​​in real time, compares them with the set values, and calculates the operating frequency of the vacuum pump 1, the opening of the electric regulating valve 3 and the flow opening of the mass flow controller 6 respectively through a specific PID formula, collects data in real time and dynamically adjusts the operating status of the equipment; due to the inherent characteristics of the electric regulating valve 3 and the mass flow controller 6, the electric regulating valve 7 is used to roughly adjust the fresh air volume and the dynamic balance of the pressure in the cabin 5. After the pressure reaches the operating conditions of the mass flow controller 6, the mass flow controller 6 is used to fine-tune the fresh air volume and the dynamic balance of the pressure in the cabin 5, so that the control accuracy of the simulated environment in the cabin 5 is higher.

[0020] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific implementation methods. Any modifications, equivalent replacements, improvements, etc. made to the above embodiments based on the technical essence of the present invention shall fall within the protection of the present invention.

Claims

1. A new type of low-pressure animal experiment chamber, characterized by : comprising a vacuum pump (1), a connector (2), a solenoid valve (3), a cabin (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 cabin (5); the electric regulating valve (7) is connected to the cabin (5) and is used to perform preliminary regulation of the pressure balance inside the cabin (1); the mass flow controller (6) is connected to the cabin (5) and is used to perform precise regulation of the pressure balance inside the cabin (1); the control system is respectively connected to the vacuum pump (1), the solenoid valve (3), the mass flow controller (6) and the electric regulating valve (7) 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. A novel low-pressure animal experiment chamber according to claim 1, characterized in that :The control system is PLC.

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

4. A novel low-pressure animal experiment 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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