CN-121977264-A - Real-time online energy efficiency ratio monitoring device of granary air conditioner

CN121977264ACN 121977264 ACN121977264 ACN 121977264ACN-121977264-A

Abstract

The invention discloses a real-time online energy efficiency ratio monitoring device of a granary air conditioner, which comprises a temperature and humidity transmitter, a wind speed transmitter, a network protocol converter and a management background module, wherein the temperature and humidity transmitter, the wind speed transmitter, the network protocol converter and the management background module are matched with the air conditioner, the temperature and humidity transmitter, the wind speed transmitter and the network protocol converter are electrically connected with a power supply, the network protocol converter is electrically connected with the wind speed transmitter and the temperature and humidity transmitter, and the management background module is connected with the network protocol converter of each granary through a router. According to the invention, the temperature and humidity values of the air at the air inlet and the air outlet of each air conditioner in the granary are detected in real time, the energy efficiency ratio of the air conditioner is calculated in real time according to the wind speed of the air outlet, the running condition and the health condition of the energy efficiency ratio of the air conditioner in each granary in the granary are detected in real time, and the later running condition of air conditioning equipment is predicted. If the air conditioner is beyond the normal range, the alarm information can be sent to remind the user, so that the user can conveniently and timely check faults and errors, the air conditioner is protected, and the effects of saving energy and improving the working efficiency of the air conditioner are achieved.

Inventors

LIU ZILI
JIN GUANGFENG
ZHANG QINGHUI

Assignees

郑州贝博电子股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260227

Claims (7)

1. The real-time online energy efficiency ratio monitoring device for the air conditioner of the granary is characterized by comprising a temperature and humidity transmitter, an air speed transmitter, a network protocol converter and a management background module which are matched with the air conditioner, wherein the temperature and humidity transmitter, the air speed transmitter and the network protocol converter are electrically connected with a power supply, the network protocol converter is electrically connected with the air speed transmitter and the temperature and humidity transmitter, and the management background module is connected with the network protocol converter of each granary through a router.
2. The real-time online energy efficiency ratio monitoring device of the granary air conditioner according to claim 1 is characterized in that a standard AC-DC 24V power supply is adopted as the power supply and matched with power supplies required by other transmitters, the network protocol converter is of the type ETH-RS485-M08, and the converter is in wired network to 8-way 485 communication.
3. The real-time online energy efficiency ratio monitoring device of the granary air conditioner according to claim 1, wherein the air conditioner is of a model HLD-9/ASNW, HLD-17/ASNW or HLD-40/ASNW, a 485 communication interface is arranged in the air conditioner and is used for communicating with an upper computer, starting and stopping the air conditioner is remotely controlled, and real-time operation parameters of the air conditioner are read, wherein the real-time operation parameters comprise the current set outlet wind speed, inlet and outlet temperature and humidity and current working current.
4. The real-time online energy efficiency ratio monitoring device of the granary air conditioner is characterized in that a temperature and humidity transmitter is of a model KTH2-IIC-PVC, the transmitter is in butt joint with an upper computer by adopting a standard ModBus RTU protocol, the wind speed transmitter is of a model JXBS-3001, and the background upper computer is programmed by adopting VC++.
5. The device for monitoring the real-time online energy efficiency ratio of the air conditioner of the granary according to claim 1, wherein the management background module is internally provided with an air conditioner monitoring system for calculating the energy efficiency ratio according to the accumulation of the air quantity, the temperature difference and the time of the air inlet and the air outlet of the air conditioner, wherein the energy efficiency ratio is calculated according to a formula The derivation process of (2) is as follows: According to the formula (1); (2); (3); Substituting formulas (3) and (2) into formula (1): ; The method can be obtained through calculation: (4) The formula is a final formula for calculating the energy efficiency ratio, and the detected actual parameters are substituted into the formula (4), so that the energy efficiency ratio of the air conditioner can be directly calculated; wherein Q n is the refrigerating capacity of the nth bin, 、 The temperature difference of the air inlet and the air outlet of the air conditioner of the nth bin is V n , the temperature difference of the air inlet and the air outlet of the air conditioner of the nth bin is delta T n , the cross section area of the air outlet of the air conditioner of the nth bin is S n , the air flow speed of the air outlet of the air conditioner of the nth bin is V n , the running time of the air conditioner of the nth bin is delta T n , the air inlet temperature of the air conditioner of the nth bin is T n-T1 , the air outlet temperature of the air conditioner of the nth bin is T n-T2 , and the refrigerating electric power of the air conditioner of the nth bin is P n .
6. The real-time online energy efficiency ratio monitoring device of the granary air conditioner according to claim 5, wherein the method for judging the current running state of the air conditioner by the air conditioner monitoring system comprises the following steps: S11, the wind speed of the air conditioner fan is not less than 80% of the current set wind speed, the current energy efficiency ratio of the air conditioner is not less than 90% of the air conditioner calibration energy efficiency ratio, and a user is prompted that the air conditioner state is good; s12, the wind speed of the air conditioner fan is not less than 80% of the current set wind speed, the current energy efficiency ratio of the air conditioner is between 90% and 70% of the air conditioner standard energy efficiency ratio, and a user is prompted that the current air conditioner is in a sub-health state; S13, prompting a user to maintain if the wind speed of the air conditioner fan is smaller than 80% of the current set wind speed or the current energy efficiency ratio of the air conditioner is smaller than 70% of the calibrated energy efficiency ratio of the air conditioner; The discriminant function formula is as follows: 。
7. The apparatus for monitoring the real-time on-line energy efficiency ratio of a barn air conditioner according to claim 6, wherein the predicting the later operation health condition of the air conditioner according to the real-time observation of the operation data of the air conditioner comprises the steps of: S21, judging whether the performance of the air conditioner is good or bad according to the actual situation, wherein if the wind speed of the air conditioner is obviously reduced, the situation that the dust screen of the air conditioner is not smooth is generally caused, the probability that the air conditioner has problems is lower, the air conditioner operates with the highest energy efficiency ratio of one operation period as a sample, one period is a complete cooling process, from the actual data, the energy efficiency ratio is gradually reduced along with the reduction of the temperature difference of an inlet temperature difference and an outlet temperature difference, the air conditioner energy efficiency ratio cannot be judged to be not up to standard and alarm because the energy efficiency ratio is reduced in the later period of the operation period, and the air conditioner energy efficiency ratio in a period of time is taken as a reference to predict the future use condition; S22, utilizing a moving average prediction method, sequentially taking continuous multiple data to obtain an average value along with the time sequence, adding a recent data every time period, and removing a long-term historical data to obtain a new average value; S23, moving average makes the data smoother, eliminates the influence of periodic variation and irregular variation, and enables long-term trend to be displayed, wherein a prediction formula is as follows: Wherein the method comprises the steps of The predicted value is the predicted value of the running state of the air conditioner which is started next time; the energy efficiency ratio of the air conditioner in the current operation is set; the air conditioner operation energy efficiency ratio is pushed forward for m times for the operation; in practice, m can be 10-15 times.

Description

Real-time online energy efficiency ratio monitoring device of granary air conditioner Technical Field The invention relates to the technical field of air conditioner energy efficiency detection, in particular to a real-time online energy efficiency ratio monitoring device for a granary air conditioner. Background The application provides an on-line monitoring device for the air conditioner, which is characterized in that the energy efficiency of the air conditioner is the proportion relation between the consumed electric energy and the refrigerating or heating effect in the running process of the air conditioner, the higher the energy efficiency ratio is, the lower the consumed electric energy in unit time is, the better the refrigerating or heating effect is, the energy efficiency level of the air conditioner is measured by the energy efficiency ratio under the general condition, the energy efficiency ratio is the ratio of the refrigerating capacity to the input power of the air conditioner under the specific condition, the energy efficiency of the air conditioner is improved, the energy consumption is reduced, the electric expense is reduced, the influence on the environment is also reduced, and the emission of greenhouse gases is reduced. Disclosure of Invention The invention aims to solve the defects in the prior art, and provides a real-time online energy efficiency ratio monitoring device for a granary air conditioner. In order to achieve the above purpose, the present invention adopts the following technical scheme: the real-time online energy efficiency ratio monitoring device for the air conditioner of the granary comprises a temperature and humidity transmitter, an air speed transmitter, a network protocol converter and a management background module which are matched with the air conditioner, wherein the temperature and humidity transmitter, the air speed transmitter and the network protocol converter are electrically connected with a power supply, the network protocol converter is electrically connected with the air speed transmitter and the temperature and humidity transmitter, and the management background module is connected with the network protocol converter of each granary through a router. The network protocol converter is preferably an ETH-RS485-M08 type, and the converter is capable of converting wired network into 8-way 485 communication, thereby meeting the system requirements and simplifying the circuit design. Preferably, the air conditioner adopts model numbers HLD-9/ASNW, HLD-17/ASNW and HLD-40/ASNW, and selects different power models according to the size of the granary, and the type of air conditioner is internally provided with a 485 communication interface which can be conveniently communicated with an upper computer, can remotely control the starting and stopping of the air conditioner, and can read real-time operation parameters of the air conditioner, such as the current set outlet wind speed, inlet and outlet temperature and humidity, current working current and the like. Preferably, the temperature and humidity transmitter is KTH2-IIC-PVC, the transmitter is conveniently in butt joint with an upper computer by adopting a standard ModBus RTU protocol, the wind speed transmitter is JXBS-3001, the precision of the transmitter is high, the stability is high, the size is small, the installation is easy, and the data processing speed is high by adopting VC++ programming for a background upper computer. Preferably, the management background module is internally provided with an air conditioner monitoring system, and calculates an energy efficiency ratio according to the air quantity, the temperature difference and the time accumulation of an air inlet and an air outlet of the air conditioner, wherein the energy efficiency ratio calculation formula is as follows: The derivation process of (2) is as follows: According to the formula (1); (2); (3); Substituting formulas (3) and (2) into formula (1):; The method can be obtained through calculation: (4); The formula is a final formula for calculating the energy efficiency ratio, and the detected actual parameters are substituted into the formula (4), so that the energy efficiency ratio of the air conditioner can be directly calculated; wherein Q n is the refrigerating capacity of the nth bin, 、 The temperature difference of the air inlet and the air outlet of the air conditioner of the nth bin is V n, the temperature difference of the air inlet and the air outlet of the air conditioner of the nth bin is delta T n, the cross section area of the air outlet of the air conditioner of the nth bin is S n, the air flow speed of the air outlet of the air conditioner of the nth bin is V n, the running time of the air conditioner of the nth bin is delta T n, the air inlet temperature of the air conditioner of the nth bin is T n-T1, the air outlet temperature of the air conditioner of the nth bin is T n-T2, and the refrigerating electric power