Constant temperature-constant humidity laboratory

Abstract

The invention discloses a constant temperature-constant humidity laboratory, which belongs to the field of laboratories. A workshop, an equipment room, an air feeding bin and an air mixing bin are arranged in the laboratory, the top of the workshop is provided with a porous plate suspended ceiling, an air feeding pipe is arranged in the air feeding bin, a fresh air hole introduces fresh air into the air mixing bin by a fresh air pipeline, an air conditioner unit is arranged in the equipment room, the lower part of the air mixing bin is connected to the air conditioner unit, the air conditioner unit is connected to the air feeding pipe by an air conditioner auxiliary electric heater, a plenum chamber and a humidifier, air returning upright columns are arranged in the workshop, the lower parts of the air returning upright columns are provided with air returning holes, and the air returning upright columns are connected to the air mixing bin by air returning pipelines. The constant temperature-constant humidity laboratory also comprises an intelligent control system having a PLC. Compared with the prior art, the constant temperature-constant humidity laboratory has the characteristics of high airflow circulation strength, stable wind speed, uniform temperature and humidity, no dust accumulation, good stability, capability of meeting a fresh air volume demand of workers, high disturbance resistance, high control precision and direct and visible temperature and humidity changes in the laboratory.

Description

technical field [0001] The invention relates to the laboratory field, in particular to a constant temperature and humidity laboratory. Background technique [0002] The constant temperature and humidity laboratory is a laboratory that makes the room meet the experimental requirements of temperature and humidity through some special equipment and technical methods. The constant temperature and humidity laboratory is the infrastructure for material and product quality inspection. The existing constant temperature and humidity laboratory air supply and return mode adopts the air supply floor return air mode, the air supply is sent to the laboratory through the air duct through the diffuser, and the return air is returned to the air conditioning return air system through the elevated floor. Since the constant temperature and humidity laboratory is a place where people work, the staff needs to move around frequently during the experiment, and more high-precision instruments need ...

AI Technical Summary

Problems solved by technology

[0004] 1. Low air circulation intensity, high local wind speed, and uneven temperature and humidity: In the prior art, the airflow organization mode of upper air supply and lower air return is adopted. The air flow enters the laboratory from the diffuser at the upper part of the laboratory, and flows from the elevated The floor is returned to the air-conditioning return air system, and the airflow in the laboratory is vertical from top to bottom, and it is not fully circulated in the laboratory, and the air supply is sent in through the air duct through the diffuser In the laboratory, the position of the diffuser is fixed, and the air sent into the laboratory through the diffuser will have a local wind speed that is too high, which cannot guarantee the uniformity of temperature and humidity in the constant temperature and humidity laboratory.

[0005] 2. Easy to accumulate dust: The airflow organization method of upper supply and lower return air is the traditional airflow organization method, which is mostly suitable for computer rooms (unmanned operation). The computer room needs anti-static, and many control lines should be arranged under the floor. The most ideal solution

In the constant temperature and humidity laboratory where laboratory personnel work, the garbage generated by normal work and the dust generated by personnel walking are deposited under the return air floor through the return air outlet, and the slight dust will circulate in the room with the wind circulation. Physical and mental health hazards

[0006] 3. Poor stability: The air flow organization method of the upper supply and the lower return air adopts the elevated floor to form the return air chamber. Due to the poor stability of the elevated floor, it is not suitable to place high-precision instruments on the suspended ground, and it cannot be used as a stability laboratory. In use There are certain limitations

[0007] 4. Closed and hypoxic: The existing constant temperature and humidity laboratory is a closed environment, and the temperature and humidity in the laboratory are adjusted by precision air conditioning. However, the laboratory staff has been in such a special closed laboratory environment for a long time. It is easy to cause adverse reactions such as hypoxia and irritability among the staff, and the work is relatively depressing

[0008] 5. The existing control system is static control. This control method is suitable for computer rooms. It does not need to introduce fresh air. Usually, there are few people coming in and out. It cannot meet the demand for fresh air in the laboratory. In some laboratories, fresh air or laboratory The airflow disturbance at the moment of personnel entering and leaving will cause fluctuations in temperature and humidity in the laboratory, and the anti-disturbance ability is poor;

[0009] 6. The temperature and humidity sensor of the existing control system is installed at the return air outlet of the air conditioning unit, and the range of sensing temperature and humidity changes is limited. low precision;

[0010] 7. The temperature and humidity of the existing control system are displayed on the air conditioning unit, and laboratory operators cannot visually see the temperature and humidity changes in the laboratory

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