Return air measuring device for induced chilled beams
A measuring device and inductive technology, applied in the direction of detecting fluid flow by measuring differential pressure, volume/mass flow generated by mechanical effects, etc. The effect of simple structure, energy saving and convenient operation
Inactive Publication Date: 2018-10-12
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology
[0004] The purpose of the present invention is to provide a return air measurement device for induced chilled beams, avoiding the problem that the return air volume cannot be accurately measured due to the small return air volume and low wind speed, so as to realize accurate measurement of fluids at low flow rates and low wind speeds , simple structure, easy operation, energy saving
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[0015] The working principles and specific methods of the present invention will be described in further detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited thereto.
[0016] Such as Figure 1 to Figure 3 As shown, a return air measurement device for induced chilled beams includes two parts, the primary air section 10 and the secondary air section 11. The primary air section 10 is for the introduction of fresh air, and the secondary air section 11 is for the return air. Induce inhalation.
[0017] The primary air section 10 is composed of a blower 1 , a nozzle A3 , a fresh air pipe 5 , a differential pressure sensor A4 , and an inductive chilled beam 7 . Blower 1 introduces outdoor fresh air and sends it into induced chilled beam 7; nozzle A3 is placed between blower 1 and induced chilled beam 7; differential pressure sensor A4 is placed on both sides of nozzle A3 to measure fresh air on both sides of no...
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The invention relates to a return air measuring device used for an inducible chilled beam. The device comprises a primary air section and a secondary air section, and a blower is connected with an inducible chilled beam through a nozzle, pressure difference sensors are arranged on two sides of the nozzle in the primary air section and are used to measure fresh air pressure difference values on two sides of the nozzle. A frequency conversion induced draft fan is connected with a fan housing through the nozzle. Through the frequency conversion induced draft fan, indoor return air is led and sent into the fan housing. Pressure difference sensors are arranged on two sides of nozzle in the secondary air section, and are used to measure return air pressure difference values on two sides of the nozzle. A four-way valve is connected with a fan housing small hole through a gas pipe. Incense is placed on the center of the four-way valve. Through observing the flowing directions of smoke in the four-way valve, whether internal air pressure in the fan housing is equal to external atmospheric pressure is determined. The device can accurately measure return air amount, and is simple in structure, convenient in operation, and saves energy, and can be widely applied in fluid measurement in other small-flow low-wind-speed conditions.
Description
technical field [0001] The invention relates to a return air measuring device of a water-type air-conditioning system, in particular to a return air measuring device for induced chilled beams. Background technique [0002] The induced chilled beam is an air-water air-conditioning system. Its working principle is: after the blower introduces the primary air, it is sprayed out at high speed through the nozzle, and negative pressure is generated in the chilled beam, and the indoor air (secondary air) is sucked in through the air deflector. ; The cooled (or heated) secondary air is mixed with the primary air, and finally sent into the room. [0003] At present, Pitot tube flowmeters or hot-wire anemometers are mostly used for air volume measurement in air conditioning systems. However, in the induced chilled beam system, the air in the secondary air section is induced by the negative pressure generated inside the chilled beam, and its wind pressure is small and the wind speed i...
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IPC IPC(8): G01F1/34
CPCG01F1/34
Inventor 翁文兵王非王鹏唐用强黄旭李树峰梁彪朱佳璐
Owner UNIV OF SHANGHAI FOR SCI & TECH