Central air conditioner comprehensive energy efficiency monitoring device

Abstract

The invention belongs to the technical field of energy efficiency monitoring devices, particularly relates to a comprehensive energy efficiency monitoring device for a central air conditioner, and aims to solve the problem that the energy utilization efficiency is reduced due to the fact that the energy efficiency condition of a host, the energy efficiency condition of a freezing and cooling pump and the overall energy efficiency ratio of a system of an air conditioning system are inconvenient to master in the prior art. The system comprises an equipment module. The energy efficiency monitoring module is connected with the equipment module, and the energy efficiency monitoring module is connected with a fault early warning module; the data recording module is connected with the fault early warning module, and the data recording module is connected with a data conversion module and a data analysis module. In the using process, a user can be helped to master the host energy efficiency condition of the air conditioning system, the energy efficiency condition of a freezing and cooling pump and the overall energy efficiency ratio of the system; therefore, energy utilization efficiency is improved, operation cost is reduced, and service life of equipment is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of energy efficiency monitoring devices, and more particularly to a central air-conditioning comprehensive energy efficiency monitoring device. Background Art

[0002] The central air-conditioning comprehensive energy efficiency monitoring device is used to monitor the energy efficiency of the central air-conditioning system in real time. For large buildings such as shopping malls and office buildings: due to the large air-conditioning load in these places, the energy efficiency monitoring device can help managers formulate reasonable air-conditioning operation strategies; for industrial production facilities: the energy efficiency of the factory process air-conditioning directly affects the production cost, and the monitoring device can help enterprises optimize energy use; for public buildings: public buildings such as hospitals and schools can also use the energy efficiency monitoring device to improve the operation efficiency of the air-conditioning system and ensure the balance between comfort and energy consumption.

[0003] In the prior art, it is not convenient to master the energy efficiency status of the host of the air-conditioning system, the energy efficiency status of the chilled water and cooling pumps, and the overall energy efficiency ratio of the system, which results in a reduction in energy utilization efficiency. Therefore, we propose a central air-conditioning comprehensive energy efficiency monitoring device to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the disadvantages in the prior art that it is not convenient to master the energy efficiency status of the host of the air-conditioning system, the energy efficiency status of the chilled water and cooling pumps, and the overall energy efficiency ratio of the system, which results in a reduction in energy utilization efficiency, and to propose a central air-conditioning comprehensive energy efficiency monitoring device.

[0005] A central air-conditioning comprehensive energy efficiency monitoring device provided by the present application adopts the following technical solutions:

[0006] A central air-conditioning comprehensive energy efficiency monitoring device includes:

[0007] An equipment module;

[0008] An energy efficiency monitoring module, the energy efficiency monitoring module is connected to the equipment module, and the energy efficiency monitoring module is connected to a fault warning module;

[0009] A data recording module, the data recording module is connected to the fault warning module, the data recording module is connected to a data conversion module and a data analysis module, the data conversion module is connected to a server module;

[0010] A remote monitoring module, the remote monitoring module is connected to the data analysis module, the remote monitoring module is connected to an energy-saving optimization suggestion module, the energy-saving optimization suggestion module is connected to a multi-parameter monitoring module, the multi-parameter monitoring module is connected to an energy efficiency ratio calculation module, and the energy efficiency ratio calculation module is connected to the energy efficiency monitoring module.

[0011] Further, the multi-parameter monitoring module includes a flow monitoring unit, a first temperature monitoring unit, a second temperature monitoring unit, and a pressure monitoring unit. The flow monitoring unit is connected to the first temperature monitoring unit, the first temperature monitoring unit is connected to the second temperature monitoring unit, and the second temperature monitoring unit is connected to the pressure monitoring unit.

[0012] Further, the fault warning module is used to issue an alarm in a timely manner when the energy efficiency of the equipment is abnormal, reminding the maintenance personnel to conduct inspections and avoiding energy waste caused by faults.

[0013] Further, the multi-parameter monitoring module is used to monitor temperature, flow, and pipeline pressure parameters. The energy-saving optimization suggestion module is used to provide targeted energy-saving improvement suggestions based on the monitoring data. The remote monitoring module is used to view the system status in real time through mobile phones and computers.

[0014] Further, the data recording module is used to continuously record the energy consumption data and the historical data of cooling and heating supply of the air conditioner operation. The data analysis module is used to analyze the collected data.

[0015] Further, the energy consumption monitoring module is used to collect and analyze the energy consumption data of the air conditioner host and water pump in real time, monitor each device of the air conditioning system, and the energy efficiency ratio of the system.

[0016] Further, the energy efficiency monitoring module includes a cooling and heating quantity monitoring unit, an electricity consumption monitoring unit, and a data transmission unit. The cooling and heating quantity monitoring unit is connected to the electricity consumption monitoring unit, and the electricity consumption monitoring unit is connected to the data transmission unit.

[0017] Further, the energy efficiency ratio calculation module is used to calculate the energy efficiency ratio of the system. The cooling and heating quantity monitoring unit obtains the cooling and heating quantity of the circulating water per unit time. The first temperature monitoring unit obtains the outlet water temperature T2 of the circulating water, the second temperature monitoring unit obtains the inlet water temperature T1 of the circulating water, and the flow monitoring unit obtains the circulating water flow m per unit time. The system cooling and heating supply quantity Q = ∫m×c×ΔT is obtained through integration. The electricity consumption of each device, including the air conditioner host and water pump P, is collected. Then the instantaneous energy efficiency ratio err = Q / P. Based on this, the cumulative energy efficiency ratio and the energy efficiency ratio over a time span are obtained.

[0018] In summary, the present application includes at least one of the following beneficial technical effects:

[0019] 1. This solution can collect and analyze the energy consumption data of the air conditioner host, water pump, etc. in real time through the monitoring module, monitor each device of the air conditioning system, and the energy efficiency ratio (EER or COP) of the system;

[0020] 2. When the energy efficiency of the equipment in this solution is abnormal during operation, it can issue an alarm in time to remind the maintenance personnel to conduct inspections, avoid energy waste caused by failures, and continuously record the energy consumption data and the historical data of cooling and heating supply of the air conditioner operation through the data recording module and the data analysis module for subsequent analysis;

[0021] 3. In this solution, users can remotely and real-time view the system status through mobile phones or computers. According to the monitoring data, the energy-saving optimization suggestion module provides targeted energy-saving improvement suggestions.

[0022] The present invention can help users master the host energy efficiency status, the energy efficiency status of the chilled water and cooling pumps, and the overall energy efficiency ratio of the air-conditioning system during use, thereby improving the energy utilization efficiency, reducing the operating cost, and extending the equipment life. Brief Description of the Drawings

[0023] Figure 1 It is a structural block diagram of a central air-conditioning comprehensive energy efficiency monitoring device proposed by the present invention;

[0024] Figure 2 It is a structural block diagram of the energy efficiency monitoring module of a central air-conditioning comprehensive energy efficiency monitoring device proposed by the present invention;

[0025] Figure 3 It is a structural block diagram of the multi-parameter monitoring module of a central air-conditioning comprehensive energy efficiency monitoring device proposed by the present invention;

[0026] Figure 4 It is a schematic diagram of the energy efficiency ratio detection principle of a central air-conditioning comprehensive energy efficiency monitoring device proposed by the present invention;

[0027] Figure 5 It is a schematic diagram of the change of the measured comprehensive COP and the equipment energy consumption of a central air-conditioning comprehensive energy efficiency monitoring device proposed by the present invention. Detailed Embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0029] Embodiment

[0030] Referring to Figures 1 - 5 , a central air-conditioning comprehensive energy efficiency monitoring device includes:

[0031] Equipment module;

[0032] Energy efficiency monitoring module, the energy efficiency monitoring module is connected to the equipment module, and the energy efficiency monitoring module is connected to a fault warning module;

[0033] Data recording module, the data recording module is connected to the fault warning module. The data recording module is connected to a data conversion module and a data analysis module, and the data conversion module is connected to a server module;

[0034] Remote monitoring module, the remote monitoring module is connected to the data analysis module. The remote monitoring module is connected to an energy-saving optimization suggestion module, the energy-saving optimization suggestion module is connected to a multi-parameter monitoring module, the multi-parameter monitoring module is connected to an energy efficiency ratio calculation module, and the energy efficiency ratio calculation module is connected to an energy efficiency monitoring module. The energy efficiency monitoring module includes a cooling and heating capacity monitoring unit, a power consumption monitoring unit, and a data transmission unit. The cooling and heating capacity monitoring unit is connected to the power consumption monitoring unit, and the power consumption monitoring unit is connected to the data transmission unit. The cooling and heating capacity monitoring unit uses an ultrasonic cooling and heating capacity meter with a built-in power supply and a data communication card (supporting NB and GPRS communication). The ultrasonic cooling and heating capacity meter is installed on the air-conditioning pipeline in an external clamping manner. For existing central air-conditioning systems, it avoids laying power lines and data communication lines on site, greatly facilitating the measurement of flow rate and cooling and heating capacity. At the same time, for the measurement of cooling and heating capacity, two temperature sensors are required. An external sticking type sensor is used to avoid pipe hole installation, and the system error is corrected in the background software. Since the cooling capacity is obtained by multiplying the flow meter by the temperature difference, and the measurement error of the external sticking type temperature sensor is offset by subtracting to obtain the temperature difference, the measurement error of the cooling and heating capacity is controlled within 0.5%. The present invention also designs a portable aviation password box to install the whole set of system, with three sets of ultrasonic cooling and heating capacity meters configured by default inside, which can be used for measuring the energy efficiency ratio of a chilled water system with three central air-conditioning main units. If there are more air-conditioning main units, more ultrasonic cooling and heating capacity meters can be added. Six sets of temperature and humidity sensors, six sets of electricity meter readers, and one on-site installed energy efficiency ratio monitoring and display device are also configured in the portable password box;

[0035] This Internet of Things air-conditioning energy efficiency monitoring system designs six sets (or more) of temperature and humidity sensors, which are used to capture the working conditions during energy efficiency ratio monitoring. According to national standards, when measuring the energy efficiency ratio, the corresponding outdoor temperature and humidity conditions, chilled water supply and return water temperature and humidity conditions, and cooling water supply and return water conditions must be met. At the same time, considering energy-saving renovation, it is necessary to ensure that the air-conditioning effect after renovation will not be worse than that before renovation, and the temperature and humidity in the air-conditioned area remain unchanged. Therefore, temperature and humidity sensors need to be installed in the air-conditioned area. Traditional indoor temperature and humidity sensors require laying power lines and communication lines. This invention uses Internet of Things technology, with a built-in power supply and a data communication card (supporting NB and GPRS communication), and the battery can work continuously for 15,000 hours, greatly facilitating the installation, measurement, and verification of energy-saving renovation projects;

[0036] The Internet of Things air conditioner energy efficiency monitoring system is designed with 6 sets (or more) of electricity meter readers. The reader uses image recognition technology and is installed on the display frame of mechanical or digital electricity meters. By taking pictures, it automatically recognizes the numbers in the display frame, uploads them to the background software, and converts them into electricity consumption data. This reader avoids the trouble of laying power lines and communication lines required for installing smart electricity meters separately. This invention uses Internet of Things technology, comes with its own power supply and data communication card (supporting NB and GPRS communication). By setting the photo-taking interval, according to the measurement specifications of the national energy efficiency ratio, it can take pictures once every 5 - 10 minutes, and the battery of the reader can work continuously for more than 3 years, greatly facilitating the installation measurement and acceptance of energy-saving renovation projects and the electricity collection of high-energy-efficiency computer rooms.

[0037] The multi-parameter monitoring module includes a flow monitoring unit, a first temperature monitoring unit, a second temperature monitoring unit, and a pressure monitoring unit. The flow monitoring unit is connected to the first temperature monitoring unit, the first temperature monitoring unit is connected to the second temperature monitoring unit, and most of the second temperature monitoring units are connected to the pressure monitoring unit. The energy consumption monitoring module is used to collect and analyze the energy consumption data of the air conditioner host and water pump in real time, monitor each device of the air conditioning system, as well as the energy efficiency ratio of the system, and has a load prediction function: collect outdoor meteorological parameters, and automatically predict the cooling and heating supply required by the air conditioning system according to the long-term cooling and heating collection data based on the air temperature.

[0038] Q(t) = cpGtΔTt

[0039] In the formula: Q(t) ---- the air conditioner load at time t;

[0040] cp ---- the specific heat at constant pressure of water, which is a fixed value;

[0041] Gt ---- the chilled water flow at time t;

[0042] ΔTt --- the temperature difference between the chilled water supply and return at time t;

[0043] Load prediction value: Q(t + dt) = Q(t) + [Q(t) - Q(t - dt)]

[0044] In the formula: Q(t + dt) --- the predicted value of the air conditioner load for the next detection period;

[0045] Q(t - dt) --- the measured value of the air conditioner load for the previous detection period;

[0046] The fault warning module is used to issue an alarm in a timely manner when the energy efficiency of the equipment is abnormal, reminding the maintenance personnel to conduct inspections and avoiding energy waste caused by faults. The data recording module is used to continuously record the energy consumption data and the historical data of cooling and heating capacity of the air conditioner operation. The data analysis module is used to analyze the collected data. The multi-parameter monitoring module is used to monitor temperature, flow rate, and pipeline pressure parameters. The energy-saving optimization suggestion module is used to provide targeted energy-saving improvement suggestions based on the monitoring data. The remote monitoring module is used to view the system status in real time through mobile phones and computers. The energy efficiency ratio calculation module is used to calculate the energy efficiency ratio of the system. The cooling and heating capacity monitoring unit obtains the cooling and heating capacity of the circulating water per unit time. The first temperature monitoring unit obtains the outlet water temperature T2 of the circulating water, and the second temperature monitoring unit obtains the inlet water temperature T1 of the circulating water. The flow rate monitoring unit obtains the circulating water flow rate m per unit time. The cooling and heating capacity of the system Q = ∫m×c×ΔT is obtained through integration. The electricity consumption of each device, including the air conditioner host and the water pump P, is collected. Then the instantaneous energy efficiency ratio err = Q / P. Based on this, the cumulative energy efficiency ratio and the energy efficiency ratio over a time span are obtained;

[0047] Measuring the water pump efficiency: Collect the flow rate such as 340 M3 / H and the pressure gauge value such as 36 M. The input power of the water pump P = QH*9.807 / 3600 / n, and the water pump efficiency n can be calculated;

[0048] Cumulative energy efficiency: (According to the start and end time periods, which is the increment that occurs within the start and end times. The cumulative energy efficiency ratio = cooling capacity increment kwh / electricity consumption increment kwh, obtaining a value, which is displayed using a pointer meter or a numerical value according to the interface layout);

[0049] Real-time energy efficiency: (Taking readings every 10 minutes, which is the increment that occurs within 10 minutes. The real-time energy efficiency ratio = cooling capacity increment kwh / electricity consumption increment kwh, obtaining a broken line that is refreshed every 10 minutes, and the time coordinate continuously moves backward.

[0050] The implementation principle in this embodiment is as follows: When in use, the energy consumption data of the air-conditioning host, water pump, etc. are collected and analyzed in real time through the monitoring module, and various devices of the air-conditioning system, as well as the energy efficiency ratio (EER or COP) of the system, are monitored. When the energy efficiency of the equipment operation is abnormal, an alarm can be issued in time to remind the maintenance personnel to conduct inspections, avoiding energy waste caused by faults. The energy consumption data of the air-conditioning operation, the historical data of cooling and heating capacity are continuously recorded by the data recording module and the data analysis module, which is convenient for subsequent analysis (such as seasonal changes, load changes, etc.). Users can remotely view the system status in real time through mobile phones or computers. According to the monitoring data, the energy-saving optimization suggestion module provides targeted energy-saving improvement suggestions. The power meter, as a device for collecting and storing relevant parameter data of electricity, monitors and measures the system to be measured as a whole, measures the parameters of current, voltage, and power of the system, and sends the data in the form of GPRS to the user center server or cloud center through the data conversion and transmission module, records and saves it in the data area. The data is transmitted to the background of the user center server, and the computer identifies and calculates the energy efficiency ratio, and compares it with the reference value in the database to determine whether the energy efficiency ratio is within the reasonable value range; the user center server also feeds back the data to the on-site portable display terminal in real time in the form of GPRS.

[0051] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. An integrated energy efficiency monitoring device for central air conditioners, characterized in that: Including: Device module; Energy efficiency monitoring module, the energy efficiency monitoring module is connected to the device module, and the energy efficiency monitoring module is connected with a fault warning module; Data recording module, the data recording module is connected to the fault warning module, the data recording module is connected with a data conversion module and a data analysis module, and the data conversion module is connected to a server module; Remote monitoring module, the remote monitoring module is connected to the data analysis module, the remote monitoring module is connected with an energy-saving optimization suggestion module, the energy-saving optimization suggestion module is connected with a multi-parameter monitoring module, the multi-parameter monitoring module is connected with an energy efficiency ratio calculation module, and the energy efficiency ratio calculation module is connected to the energy efficiency monitoring module.

2. The integrated energy efficiency monitoring device for central air conditioners according to claim 1, wherein: The energy efficiency monitoring module includes a cooling and heating quantity monitoring unit, an electricity consumption monitoring unit and a data transmission unit. The cooling and heating quantity monitoring unit is connected to the electricity consumption monitoring unit, and the electricity consumption monitoring unit is connected to the data transmission unit.

3. The comprehensive energy efficiency monitoring device for central air conditioners according to claim 2, characterized in that: The multi-parameter monitoring module includes a flow rate monitoring unit, a first temperature monitoring unit, a second temperature monitoring unit and a pressure monitoring unit. The flow rate monitoring unit is connected to the first temperature monitoring unit, the first temperature monitoring unit is connected to the second temperature monitoring unit, and most of the second temperature monitoring units are connected to the pressure monitoring unit.

4. The comprehensive energy efficiency monitoring device for central air conditioners according to claim 3, characterized in that: The energy consumption monitoring module is used to collect and analyze the energy consumption data of the air-conditioning main unit and the water pump in real time, monitor each device of the air-conditioning system, and the energy efficiency ratio of the system.

5. The integrated energy efficiency monitoring device for central air conditioners according to claim 4, wherein: The fault warning module is used to issue an alarm in time when the energy efficiency of the equipment operation is abnormal, reminding the maintenance personnel to check and avoid energy waste caused by faults.

6. The integrated energy efficiency monitoring device for central air conditioners according to claim 5, wherein: The data recording module is used to continuously record the energy consumption data of the air-conditioning operation and the historical data of the cooling and heating supply quantity. The data analysis module is used to analyze the collected data.

7. An integrated energy efficiency monitoring device for central air conditioners according to claim 6, characterized in that: The multi-parameter monitoring module is used to monitor temperature, flow rate, and pipeline pressure parameters. The energy-saving optimization suggestion module is used to provide targeted energy-saving improvement suggestions according to the monitoring data. The remote monitoring module is used to view the system status in real time through mobile phones and computers.

8. An integrated energy efficiency monitoring device for a central air conditioner according to claim 7, characterized in that: The energy efficiency ratio calculation module is used to calculate the energy efficiency ratio of the system. The cooling and heating quantity monitoring unit obtains the cooling and heating quantity of the circulating water per unit time. The first temperature monitoring unit obtains the outlet water temperature T2 of the circulating water. The second temperature monitoring unit obtains the inlet water temperature T1 of the circulating water. The flow rate monitoring unit obtains the circulating water flow rate m per unit time. The system cooling and heating supply quantity Q = ∫m×c×ΔT is obtained through integration. The electricity consumption of each device, including the air-conditioning main unit and the water pump P, is collected. Then the instantaneous energy efficiency ratio err = Q / P. On this basis, the cumulative energy efficiency ratio and the energy efficiency ratio within a time span are obtained.

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