Resistance capacitive ice content sensor
A technology of ice content and sensor, applied in the direction of converting sensor output, instrument, heating method, etc., can solve the problems such as the inability to guarantee the sensitivity and accuracy of the mechanical structure, the change of water quality, the leakage of the air conditioning system, etc. The performance is safe, stable and reliable, the structure is simple, and the measurement sensitivity is high.
Inactive Publication Date: 2006-07-19
TSINGHUA TONGFANG CO LTD +1
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Problems solved by technology
These commonly used measurement methods are applicable to the open-type external ice-melting ice storage system, but for the closed-loop external ice-melting cold storage system, since the water in the ice tank is connected to the water in the air-conditioning system, the air-conditioning system will inevitably leak, and The water quality changes greatly during use, so it is not suitable to use the existing "water level measurement method" and "freezing point measurement method" in the above static ice storage system to measure its IPF
Because the main method of the existing ice thickness measurement method is to use the displacement of the probe close to the ice surface or the conductivity of the ice water to detect the thickness of the ice layer, and the closed ice tank has a closed structure and the range of water quality changes during use. Therefore, these two ice thickness measurement methods cannot well guarantee the sensitivity and accuracy of the mechanical structure
Therefore, it is still necessary to explore a new measurement method for the measurement method of ice thickness in the ice storage tank in the closed space.
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[0018] see figure 1 with figure 2 , the present invention is composed of two parts: the measuring electrode A arranged on the ice coil inside the ice storage tank and the transmitter B arranged outside the ice storage tank. Transmitter B includes high-frequency AC power supply and output voltage detection and A / D conversion circuit. Among them, the effective value of the input voltage of the high-frequency AC power supply is 2.5V, and the frequency of the input voltage is 650HZ. The measuring electrode A is composed of a fixed plate 1 , a base plate 2 , multiple pairs of probes 3 and connecting terminals 4 . The fixed plate 1 is set to a shape that can match the embedded installation of the ice coil tube. The base plate 2 is connected to the fixed plate 1 . Ten pairs of electrode probes 3 are evenly distributed in parallel and vertical rows on the substrate 2 . The section of each electrode measuring head 3 is circular, its diameter d is 0.7 mm, its length a is 10 mm, th...
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It is an apparatus for measuring ice content in the ice trough of the air-conditioning, which comprises measuring electrode located in the ice trough ice coiler and transmitter located out of the ice trough. Its structure features lie in that the measuring electrode comprises the mounting plate recessed in the ice coiler, parent plate connected with mounting plate, several pairs of electrode probes located evenly on the parent plate and terminal connector connected with all electrode probes and with transmitter through cable shield. This invention applies the principle of RC oscillating circuit frequency response generated by high-frequency alternating power and output voltage to the measurement of ice content in the outer ice trough.
Description
technical field [0001] The invention relates to the technical field of ice storage air conditioners, in particular to a device for measuring the ice content rate in an ice storage tank of an external ice-melting ice storage system. Background technique [0002] In the ice storage air conditioning system, the ice content rate in the ice storage tank (IPF, Ice Packing Factor, refers to the mass percentage of ice in the ice-water mixture in the ice tank) marks the amount of cold stored in the ice storage tank per unit volume. size. Whether it is for the static ice-making system, the operation control of the cooler during ice-making and the prediction of the amount of residual ice during ice-melting, or for the dynamic ice-making system, it is necessary to control the amount of ice stored in the ice storage tank and avoid the pipeline caused by ice slurry transportation. Blocking and grasping the cooling demand of the terminal equipment must detect the ice content rate in the i...
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IPC IPC(8): G01D5/243F24F11/00F25B49/00
Inventor 石文星刘刚李先庭李立一赵庆珠骆维军吕晓艳
Owner TSINGHUA TONGFANG CO LTD