TH72606B - Dynamically balanced heat exchanger control device - Google Patents

Abstract

DC60 (12/01/55) Dynamic Balanced Heat Exchanger Control Device According to this invention It relies on temperature, frequency, signal, vibration and noise analysis to determine whether the refrigerant is completely evaporated in the refrigerant conduit using a small microcontroller. Low power consumption and frequency classification with mathematical principles (Fast Fourier Transform) makes no need for circuits. Electronic filter Therefore flexible in the frequency range and can Choose to analyze multiple frequencies Therefore, a more detailed signal analysis is performed by comparing the data in a database table containing the characteristics of the signal strength, vibration, loudness and frequency of the noise from the refrigerant flow, for example. According to this invention It relies on temperature, frequency, signal, vibration and noise analysis to determine whether the refrigerant is completely evaporated in the refrigerant conduit using a small microcontroller. Using low power and using mathematical frequency classification (FastFourierTransform) eliminates the need for cycles. Electronic filter Therefore flexible in the frequency range and can Choose to analyze multiple frequencies Therefore, a more detailed signal analysis is performed by comparing the data in a database table containing the characteristics of the signal strength, vibration, loudness and frequency of the sound from the refrigerant flow, etc.

Claims (6)

1. Dynamic Balance Heat Exchanger Control Device Consisting of: - A condenser phone sensor measures sound and vibration. The voltage level is directly proportional to the vibration and sound intensity generated by the evaporation of the refrigerant. This voltage is therefore a signal of vibration and sound from the evaporation of the refrigerant moving through the refrigerant pipes of the refrigeration system. The frequencies generated will have different characteristics depending on the state of the refrigerant, whether it is a liquid or a gas. There are at least one sound sensor per refrigerant circuit. - An amplifier circuit amplifies the voltage level received from the sound sensor. There are at least one amplifier circuit per refrigerant circuit. - A bandpass filter filters frequencies within a predetermined range to reduce noise. - An analog-to-digital converter converts the filtered electrical signal from the sound sensor into a digital signal. - A comparison of the calculated digital signal value with the signal voltage threshold. If it exceeds the predetermined value, the signal will be overwritten. It will be considered a signal caused by vibration and will stimulate the operation of other parts. And - The control unit has a database that stores samples of the strength of the vibration signal, the volume and frequency of the sound from the refrigerant flow to decide the amount of refrigerant in the sub-heat exchange circuit. When the results are concluded, the data will be sent out through the output. To control back to the valve for opening and adjusting the flow of refrigerant in each circuit. It has the following characteristics: - The signal level detection path (LevelDetectionmeans) acts as a preliminary decision that the received vibration and sound signals are real vibration and sound signals of the refrigerant evaporation, not caused by environmental disturbances. - The frequency analysis path For frequency analysis that relies on signal conversion by mathematical calculations To analyze and compare with the reference frequency pattern To find the probability of the occurrence of various data formats And - The decision method For deciding to classify objects By weighing the data obtained from the various paths To decide the amount of refrigerant in the sub-heat exchange circuit When the results are concluded, the data will be sent out through the output. To control back to the valve for Turn on/off the refrigerant flow adjustment for each circuit. 2. A dynamically balanced heat exchanger control device according to claim 1, wherein the temperature sensor measures the temperature of the refrigerant, which varies when the refrigerant is in different states, and provides a voltage value that varies with temperature, with one or more temperature sensors per heat exchanger circuit. 3. The dynamic balancing heat exchanger control device according to claim 1 has a means for detecting the temperature level (Temperature Detection means) which serves to make a preliminary comparison of whether there is complete evaporation of the refrigerant by relying on the reaction of the expansion of the liquid affecting the temperature. 4. The dynamically balanced heat exchanger control device according to claim 1, wherein said control unit, and said means for detecting the signal level, automatically set said threshold value if no movement or signal level is detected within the refrigerant pipe for a period of time, the control unit sets a lower threshold value, but if a high signal level is detected in the pipe for a prolonged period, the threshold value is set higher. 5. The dynamically balanced heat exchanger control device according to claim 1, wherein the control unit, the frequency analysis method, performs frequency analysis to determine the difference in the liquid-gas ratio of the refrigerant in the water pipes by using a Fast Fourier Transform (FFT) mathematical calculation, discretizing it across frequencies and normalizing the strength of each frequency against a value stored in said database table, including incorporating characteristics such as the specific properties of the refrigerant into the determination. 6. A dynamically balanced heat exchange control device according to claim 1, wherein it can be used in a domestic air conditioner unit having two or more heat exchange circuits.