35results about How to "Concentration real-time detection" patented technology

The invention discloses a complex air mixing device for a subway air conditioner. The complex air mixing device comprises a shell and a filter system, the shell is provided with a fresh air port, an air return port and an air outlet, and the filter system comprises a primary filter section, a secondary filter section, an electret filter section and an electrostatic filter section. The primary filter section and the secondary filter section are arranged at the fresh air port, the electret filter section is arranged at the air return port, and the electrostatic filter section is arranged at the air outlet. A power supply module is arranged on the top wall of the shell, and a particulate matter concentration detector is arranged in the shell, electrically connected with the power supply module and positioned between the electret filter section and the electrostatic filter section. The complex air mixing device is capable of efficiently filtering fine particulate matters in fresh air and returned air and has bactericidal, sterilizing and odor eliminating functions to truly guarantee physical health of passengers in carriages. In addition, the complex air mixing device has a synchronous detection function, electric energy distribution and energy saving are realized, completeness of an air conditioner set can be guaranteed, and convenience in assembly and utilization is achieved.

The invention relates to an efficient monitoring system for factory workshop dust. The efficient monitoring system comprises a dust detecting device, a dust image processing module, a control module, a dust processing device and an alarming module, wherein a rotatable camera is adopted as the dust detecting device and is used for collecting the dust image in a workshop; the dust image processing module is used for processing, cutting and recognizing the dust image so as to calculate the dust content in the workshop; when the dust content in the workshop exceeds standard, the alarming module is driven to alarm; and the control module is arranged in a monitor room and is used for controlling the dust detecting device, the dust processing device and the alarming device. The efficient monitoring system for factory workshop dust disclosed by the invention has the beneficial effects that the efficient monitoring system for factory workshop dust provided by the invention is capable of detecting the dust concentration in the factory workshop in real time, alarming and reminding when the dust content in the workshop exceeds standard, using the dust processing device for effectively processing the workshop dust and achieving the purpose of monitoring the workshop dust.

The invention belongs to the technical field related to exhaust gas purification, and discloses a particle sensor and a manufacturing method thereof. The particle sensor includes a connected body structure and a reference circuit; The test capacitance and the pair capacitance, the test capacitance, the pair capacitance and the reference circuit form a bridge circuit; wherein, the ratio of the test capacitance to the pair capacitance is 0.1-10. The present invention changes the working mode in real time by adding pair capacitance and a reference circuit, offsets the voltage phase difference between the test circuit and the reference circuit during the test process, and amplifies the output signal of the difference voltage to achieve the particle concentration in the environment to be tested for real-time detection purposes.

The invention discloses a liquid substance proportional mixing device and a proportional mixing method based thereon, and relates to the technical field of liquid substance mixing. The invention includes a raw liquid storage tank and a mixing tank, a pipeline A is communicated between the raw liquid storage tank and the mixing tank, and a plunger pump is arranged on the pipeline A; a liquid level sensor is arranged in the mixing tank, and a water inlet is arranged on the top of the mixing tank, and the water inlet A water inlet valve is arranged on the mouth; a Y-shaped drainage pipe is arranged at the bottom of the mixing tank, and the three ends of the Y-shaped drainage pipe are respectively connected with a mixing tank, a drainage valve and a hose. a one-way valve, a first filter and a concentration detection module; and a liquid use device, the top of which is communicated with the mixing tank through a pipeline B. Through the use of a liquid level sensor, a concentration detection module and a PLC controller, the present invention detects the concentration of the disinfectant in real time, and controls the incoming water and the original slurry of the disinfectant to ensure that the concentration of the disinfectant in the mixing tank is within a certain range.

The invention provides a dehumidifier, comprising: a body, an installation cavity is arranged in the body; a compressor is installed in the installation cavity; an exhaust assembly, the exhaust assembly has an exhaust channel, and the exhaust channel communicates with the installation cavity to The airflow in the installation cavity is discharged through the exhaust channel; the concentration detection module, at least part of the concentration detection module is installed in the installation cavity, and is used to detect the concentration of the refrigerant in the installation cavity, so as to control the exhaust air according to the concentration of the refrigerant in the installation cavity The channel is opened or closed. To solve the problem of low safety performance of the dehumidifier in the prior art.

The invention discloses a positive pressure explosion-proof system control method and belongs to the technical field of explosion prevention. After a first air source fan and a first electric valve are started, only when the concentration detected by each first gas detector is smaller than a first preset concentration, the concentration detected by the second gas detector is smaller than a secondpreset concentration, the pressure detected by the first pressure detector is smaller than a first preset pressure and / or the pressure detected by the second pressure detector is smaller than a secondpreset pressure, the concentration detected by the second gas detector is smaller than the second preset concentration; if not, a second air source fan is started, and a second electric valve is started; when the concentration detected by the at least one first gas detector is greater than or equal to a first preset concentration or the concentration detected by the second gas detector is greaterthan or equal to a second preset concentration, an alarm is given and the working device is turned off. According to the method, air can be supplemented through the second air source fan, continuousair supply of the air supply unit is ensured, the explosive gas concentration of air inlets of the two air source fans and the explosive gas concentration in the positive-pressure explosion-proof cavity are detected, and potential safety hazards are eliminated.

The invention provides a stirring device and a urea machine with the same. The stirring device includes: a stirring tank, the stirring tank has a solution outlet and a solution recovery port; a concentration detection pipeline, one end of the concentration detection pipeline is connected to the solution outlet, The other end of the concentration detection pipeline is connected to the solution recovery port to determine the concentration of the solution in the stirring tank by detecting the concentration of the solution in the concentration detection pipeline, and the The solution is returned to the stirring tank. The stirring device solves the problem in the prior art that the concentration of the urea solution is difficult to control.