A temperature regulation system for a biosafety laboratory life support system

Abstract

The application relates to a temperature regulating system for a biosafety laboratory life support system, and relates to the field of biosafety laboratories. The system comprises an air inlet main pipe, a temperature increasing module, a temperature decreasing module and an air outlet main pipe. The temperature increasing module comprises an air inlet branch pipe, an air outlet branch pipe, a heating branch pipe, a heater, a temperature controller and a temperature sensor. A plurality of heating branch pipes are connected in parallel between the air inlet branch pipe and the air outlet branch pipe, and the heating branch pipes are each provided with a heater. The temperature sensor is arranged in the heating branch pipe and located at a downstream position of the heater. The temperature controller, the temperature sensor and the heater are electrically connected. The air inlet branch pipe is connected with the air inlet main pipe, and the air outlet branch pipe and the air outlet end of the temperature decreasing module are respectively connected with the air outlet main pipe through air outlet short connection pipes. The system can heat the gas in the air inlet main pipe through the plurality of heating branch pipes, and the compressed air with large flow rate can be heated more uniformly and efficiently, so that the set temperature of the gas can be reached more quickly.

Description

Technical Field

[0001] This application relates to the field of biosafety laboratories, and more particularly to a temperature control system for a life support system in a biosafety laboratory. Background Technology

[0002] In a biosafety level 4 laboratory with biological protective clothing, a long-tube positive pressure protective suit is used to provide protection for laboratory personnel. This protective suit requires a certain pressure and flow rate of compressed air that can be directly supplied to people for breathing to maintain a certain positive pressure and provide life support for the wearer.

[0003] Due to regional climate differences, compressed air temperature regulation is often necessary to improve personnel comfort. Regarding compressed air temperature regulation, a "Life Support System for Biosafety Laboratories" (publication number CN206592772U) includes a temperature regulation module consisting of a pre-cooling unit and a pipe heater after air quality treatment to improve breathing comfort. However, this solution suffers from two problems: firstly, the series connection of the pre-cooling unit and pipe heater limits its flexibility in adjusting to gas temperature; if the initial inlet air temperature is too high, it only lowers the temperature, and if it is too low, it only raises it. Secondly, this solution relies solely on a single pipe heater for heating, resulting in low heating efficiency. Summary of the Invention

[0004] To address or partially address the problems existing in related technologies, this application provides a temperature control system for a life support system in a biosafety laboratory. The heating module and cooling module are arranged in parallel, allowing personnel to flexibly choose to heat or cool the gas according to the ambient temperature of the area. Furthermore, when heating the gas, compared to the single heater method of existing life support systems, this system heats the gas in the main intake pipe through several heating sub-pipes, resulting in more uniform and efficient heating of large-flow compressed air, thus achieving the set gas temperature more quickly.

[0005] This application discloses a temperature control system for a life support system in a biosafety laboratory, comprising an inlet main pipe, a heating module, a cooling module, and an outlet main pipe. The heating module and the cooling module are connected in parallel to the outlet end of the inlet main pipe. Both the heating and cooling modules have a main control valve at their inlet ends. The heating module includes an inlet branch pipe, an outlet branch pipe, a heating branch pipe, a heater, a temperature controller, and a temperature sensor. Several heating branch pipes are connected in parallel between the inlet and outlet branch pipes, each equipped with a heater. The temperature sensor is located in a heating branch pipe downstream of the heater. The temperature controller, temperature sensor, and heater are electrically connected. The inlet branch pipes are connected to the inlet main pipe, and the outlet ends of the outlet branch pipes and the cooling module are connected to the outlet main pipe via outlet short-circuit pipes, each equipped with a valve.

[0006] Furthermore, the heating pipes are provided with 5-8 pipes.

[0007] Furthermore, control valves can be detachably connected to both ends of the heater on each heating manifold.

[0008] Furthermore, gas temperature sensors are respectively installed on the intake manifold and the exhaust manifold.

[0009] The beneficial effects of this application are:

[0010] This application relates to a temperature control system for life support systems in biosafety laboratories. The heating and cooling modules are arranged in parallel, allowing personnel to flexibly choose to heat or cool the gas based on the ambient temperature of the area. Furthermore, when heating the gas, compared to the single heater method of existing life support systems, this system heats the gas in the main intake pipe through several heating sub-pipes, resulting in more uniform and efficient heating of large-flow compressed air, thus achieving the set gas temperature more quickly. Attached Figure Description

[0011] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0012] Figure 1 This is a schematic diagram of the structure of this application.

[0013] In the diagram, 1-Inlet main pipe, 2-Control main valve, 3-Inlet branch pipe, 4-Outlet branch pipe, 5-Heating branch pipe, 6-Heater, 7-Control branch valve, 8-Outlet main pipe, 9-Cooling module, 10-Outlet short-circuit pipe, 11-Gas temperature sensor. Detailed Implementation

[0014] The embodiments of this application will now be described in more detail with reference to the examples. While embodiments of this application are shown in the examples, it should be understood that this application can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art. Example

[0015] like Figure 1 As shown, a temperature control system for a life support system in a biosafety laboratory according to this application includes an inlet manifold 1, a heating module, a cooling module 9, and an outlet manifold 8. The heating module and the cooling module 9 are connected in parallel to the outlet end of the inlet manifold 1. Both the heating module and the cooling module 9 are equipped with a control valve 2 at their inlet front ends. When in use, the inlet manifold 1 is connected to a compressed air pipeline that has been compressed by an air compressor and has undergone dehumidification, drying, activated carbon adsorption filtration, and pressure reduction. The cooling module 9 adopts a pre-cooling unit as used in the prior art.

[0016] The heating module includes an inlet pipe 3, an outlet pipe 4, a heating pipe 5, a heater 6, a temperature controller, and a temperature sensor. Several heating pipes 5 are connected in parallel between the inlet pipe 3 and the outlet pipe 4, and each heating pipe 5 is equipped with a heater 6. The number of heating pipes 5 can be set to 5-8 as needed.

[0017] The temperature sensor is placed in the heating branch pipe 5 and located downstream of the heater 6. Specifically, the temperature sensor is at least 1 to 2 times the pipe diameter away from the heater to avoid direct heat radiation affecting the measurement accuracy. The temperature controller, temperature sensor and heater 6 are electrically connected. The air inlet branch pipe 3 is connected to the air inlet main pipe 1. The air outlet branch pipe 4 and the air outlet end of the cooling module 9 are respectively connected to the air outlet main pipe 8 through the air outlet short-connecting pipe 10. Valves are provided in the air outlet short-connecting pipe 10.

[0018] The function of the main control valve 2 is to work with the valve installed at the outlet pipe 10 to enable the gas to be heated or cooled separately.

[0019] Specifically, the temperature sensor in this application is selected as a high-pressure resistant and fast-response sensor, such as PT100, PT1000 or thermocouple, and the range needs to cover the target temperature of 20-60℃; the temperature controller is selected as a controller that supports PID algorithm, such as Siemens S7-1200 PLC, with input: receiving 4~20mA or RTD signal from the sensor, and output: PWM signal to adjust the heater;

[0020] Specifically: During the heating operation, the operator first sets the target temperature; the temperature sensor provides real-time feedback on the current temperature; the temperature controller calculates the deviation between the set value and the actual value, and outputs a control signal through a PID controller. The heater adjusts its power according to the signal to heat the gas passing through the heating pipe.

[0021] Furthermore, to facilitate the replacement of individual heaters, control valves 7 can be detachably connected to both ends of the heater 6 on each heating branch pipe 5.

[0022] Furthermore, in order to better monitor the gas temperature, gas temperature sensors 11 are respectively provided on the inlet manifold 1 and the outlet manifold 8.

[0023] How this application works:

[0024] In use, the temperature control system of this application is used in the biosafety laboratory life support system. The air compressor in the biosafety laboratory life support system compresses the air to obtain compressed air. The compressed air passes through dehumidification and drying, activated carbon adsorption filtration and pressure reduction in sequence, and is then connected to the main air inlet pipe 1 of this application through a pipeline. The main air outlet pipe 8 of this application is connected to different areas of the laboratory through gas pipelines.

[0025] Specifically, when the ambient temperature is low and compressed air needs to be heated, the control valve corresponding to the heating module and the valve corresponding to the outlet pipe 4 are opened first, while the control valve corresponding to the cooling module 9 and the valve corresponding to the outlet of the cooling module 9 are closed. During the heating operation, the operator first sets the target temperature; the temperature sensor provides real-time feedback on the current temperature; the temperature controller calculates the deviation between the set value and the actual value, and outputs a control signal through the PID controller. The heater adjusts its power according to the signal to heat the gas passing through the heating pipe. When the temperature reaches the preset target temperature, the temperature controller controls the heater to stop heating.

[0026] Similarly, when the ambient temperature is high and compressed air needs to be cooled, the control valve corresponding to the cooling module 9 and the valve corresponding to the outlet of the cooling module 9 are opened first, while the control valve corresponding to the heating module and the valve corresponding to the outlet pipe 4 are closed. The cooling module 9 pre-cooling unit can then be used to cool the gas.

[0027] After being heated or cooled to the target temperature, the gas is connected to different areas of the laboratory through the gas pipeline via the main gas outlet 8, and finally delivered to the long-tube air supply positive pressure biological protective suit. The compressed air meets certain pressure, certain flow rate, can be directly supplied to people for breathing, and is at a suitable temperature, to maintain a certain positive pressure for the protective suit and provide life support for the wearer.

[0028] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A temperature control system for a life support system in a biosafety laboratory, comprising an inlet manifold (1), a heating module, a cooling module (9), and an outlet manifold (8), characterized in that: A heating module and a cooling module (9) are connected in parallel to the outlet end of the main air intake pipe (1). The front end of the heating module and the cooling module (9) are equipped with a control valve (2). The heating module includes an air intake branch pipe (3), an air outlet branch pipe (4), a heating branch pipe (5), a heater (6), a temperature controller, and a temperature sensor. Several heating branch pipes (5) are connected in parallel between the air intake branch pipe (3) and the air outlet branch pipe (4). Each heating branch pipe (5) is equipped with a heater (6). The temperature sensor is placed in the heating branch pipe (5) and is located downstream of the heater (6). The temperature controller, the temperature sensor, and the heater (6) are electrically connected. The intake manifold (3) is connected to the intake manifold (1), and the outlet manifold (4) and the outlet end of the cooling module (9) are respectively connected to the outlet manifold (8) through the outlet short-connection pipe (10). Valves are provided in the outlet short-connection pipe (10).

2. The temperature control system for a life support system in a biosafety laboratory according to claim 1, characterized in that: The heating pipe (5) is provided with 5-8 pipes.

3. A temperature control system for a life support system in a biosafety laboratory according to claim 1, characterized in that: On each heating pipe (5), control valves (7) can be detachably connected to both ends of the heater (6).

4. A temperature control system for a life support system in a biosafety laboratory according to claim 1, characterized in that: Gas temperature sensors (11) are respectively provided on the intake manifold (1) and the exhaust manifold (8).

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