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Wind speed measurement monitoring apparatus of biohazard safety equipment

A biological safety cabinet and wind speed measurement technology, which is applied in the direction of measuring fluid velocity by using pressure difference and measuring fluid velocity by using thermal variables, which can solve the problems of increasing the safety factor of biological safety cabinets

Active Publication Date: 2014-06-11
上海力申科学仪器有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The primary purpose of the present invention is to overcome the deficiencies in the wind speed measurement of existing biological safety cabinets, thereby providing a wind speed measurement and monitoring device for biological safety cabinets, which increases the operating time of the biological safety cabinet Safety factor, in addition to sending out an alarm signal in time when the measured wind speed is abnormal, when the monitoring wind speed measurement circuit itself has inaccurate measurement, the main control unit can promptly notify the user that there is a safety risk in the system to prevent unknown dangerous situations from occurring, such as the operator being injured. The threat of polluted airflow, or the experimental sample is polluted by the polluted airflow to affect the experimental results

Method used

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  • Wind speed measurement monitoring apparatus of biohazard safety equipment
  • Wind speed measurement monitoring apparatus of biohazard safety equipment
  • Wind speed measurement monitoring apparatus of biohazard safety equipment

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Experimental program
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Embodiment 1

[0037] Such as figure 1 As shown, the biological safety cabinet wind speed measurement and monitoring device of this embodiment includes two wind speed measurement units 11, 12, a main control unit 7, a temperature detection unit 9, an alarm unit 8 and a fan control unit 10, the first wind speed measurement The unit 11 is made up of the first driving unit 3, the first heating unit 1 and the first signal processing system 5 connected in series in sequence; the second wind speed measuring unit 12 is composed of the second driving unit 4 and the second heating unit connected in series in sequence 2 and the second signal processing system 6; the drive control terminal, signal control terminal and alarm control terminal of the main control unit 7 are respectively connected with the two drive units 3, 4, two signal processing systems 5, 6 and the alarm unit 8 Electrically connected; the temperature measuring end and the fan end of the main control unit 7 are respectively connected w...

Embodiment 2

[0057] Such as Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that the number of the wind speed measurement units is n, and n is greater than 2, and the second wind speed measurement unit 13 includes a differential pressure signal acquisition unit 14 connected in sequence, a differential pressure Measuring unit 15 and pressure signal processing system 16, the input end and output end of described pressure signal processing system 16 are respectively connected with differential pressure measuring unit 15 and main control unit 7, and this differential pressure measuring unit 15 is that airflow flows through differential pressure The pressure signal generated by the signal acquisition unit 14 is transformed into an electrical signal, which is amplified and processed by the pressure signal processing system 16 , and then the main control unit 7 performs AD sampling and calculation.

[0058] The differential pressure measuring unit 15 is a pressure s...

Embodiment 3

[0074] As shown in FIG. 5( a ), the two wind speed measurement devices 31 of this embodiment can be arranged in two corresponding probes 41 of one wind speed sensor 51 , and the two probes 41 are placed vertically.

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Abstract

The invention, which belongs to the technical field of biohazard safety equipment, discloses a wind speed measurement monitoring apparatus of biohazard safety equipment. The wind speed measurement monitoring apparatus comprises a plurality of wind speed measurement units, a master control unit, and an alarm unit; and the master control unit is respectively and electrically connected with the plurality of wind speed measurement units and the alarm unit. The invention primarily aims at overcoming a defect caused by utilization of a single wind speed measurement unit by biohazard safety equipment during wind speed measurement in the prior art. According to the provided wind speed measurement monitoring apparatus, the safety coefficient for biohazard safety equipment operation can be enhanced. Therefore, an alarm signal can be sent out timely when the wind speed is abnormal; moreover, when a phenomenon of inaccurate measurement of the wind speed measurement monitoring circuit itself occurs, the mater control unit can inform the user of security risk existence in the system timely. And thus the risk of inaccurate wind speed measurement caused by damage or drift of the single wind speed sensor can be reduced; and the opportunity of air stream contamination on the user and the experiment sample can also be reduced.

Description

technical field [0001] The invention relates to the technical field of biological safety cabinets, in particular to a wind speed measurement and monitoring device for biological safety cabinets. Background technique [0002] The biological safety cabinet is an air purification safety device that prevents hazardous or unknown biological aerosols from escaping during operation. This device can filter the polluted air in the working area through a special filter channel to avoid harm to people and the environment. A safe special equipment for microorganisms, which can be used in biological laboratories, medical and health, biopharmaceutical and other related industries, and has good effects on improving process conditions and protecting the health of operators. [0003] The general biological safety cabinet uses the negative pressure airflow inhaled from the front window operation port by the centrifugal fan to protect the safety of personnel; the descending airflow filtered by...

Claims

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Application Information

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IPC IPC(8): G01P5/10G01P5/14
Inventor 黄元磊吴峻冯金栋
Owner 上海力申科学仪器有限公司