CN211262308U - Detachable remote measuring device and system for central air conditioner - Google Patents

Detachable remote measuring device and system for central air conditioner Download PDF

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Publication number
CN211262308U
CN211262308U CN201922048448.1U CN201922048448U CN211262308U CN 211262308 U CN211262308 U CN 211262308U CN 201922048448 U CN201922048448 U CN 201922048448U CN 211262308 U CN211262308 U CN 211262308U
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measuring device
central air
detachable
water pump
power
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张朋磊
张伦
杨晓睿
陈维建
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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Abstract

The utility model discloses a can dismantle central air conditioning remote measuring device and system relates to the architectural equipment field of measurement, can install fast to carry out real-time unmanned measurement to the operational parameter who has air conditioning system, through signal transmission equipment, the user can come real time monitoring measured data through the network long-rangely. The utility model discloses the device includes: the device comprises a power supply module, a data acquisition module, a data transmission module and a detachable measuring device. The data acquisition module is connected with the data transmission module, and the data acquisition module is in communication connection with the detachable measuring device. The detachable measuring device comprises: temperature measuring device, pressure measuring device, flow measuring device, power measuring device. The utility model discloses the system includes: the remote measuring device of the central air conditioner, the cloud platform and the client can be disassembled and are sequentially in communication connection. The utility model discloses can break away from artifical field measurement, to the multinomial parameter real-time measurement of air conditioning system, the dynamic behavior of accurate acquisition air conditioner to measuring device can dismantle, can install fast.

Description

Detachable remote measuring device and system for central air conditioner
Technical Field
The utility model relates to a construction equipment measures the field, especially relates to a can dismantle central air conditioning remote measuring device and system.
Background
In recent years, with the increasing importance on energy conservation and emission reduction, an inevitable trend is toward energy conservation and improvement of existing buildings. The central air-conditioning system occupies most of the energy consumption of the building, so that the energy-saving reconstruction of the central air-conditioning system is the most effective way for the energy-saving reconstruction of the building. The energy consumption diagnosis of the central air-conditioning system is a necessary premise for energy-saving reconstruction of the central air-conditioning system. To diagnose the energy consumption of the air conditioning system, the chilled water/cooling water flow, the power of the chiller and the chilled water/cooling water pump, the chilled water/cooling water inlet and outlet temperatures at the chiller unit, and the chilled water/cooling water pressure at each node are measured during the operation of the system. The traditional measuring method is that temperature signals are collected through a temperature self-recording instrument on the spot, pressure signals are collected through reading of a pressure gauge, power signals are read through a clamp-on power meter, flow signals are read through an ultrasonic flowmeter, and after all tests are finished, data are gathered for analysis. Due to the fact that the number of measurement parameters is large, the testing instruments are not uniform, and data cannot be automatically recorded and transmitted, the traditional measurement method is long in testing time, large in workload, limited in data volume, and incapable of rapidly and comprehensively mastering system operation information. And in the case of limited manpower, these parameters cannot be measured simultaneously, which results in the inability to obtain the dynamic performance of the air conditioning system. In addition, the traditional measurement mode requires a tester to stay on the site, so that the measurement cannot be carried out on the site for a long time, and the system cannot be monitored for a long time. In addition, all the measured data need to be processed and analyzed later, so that performance evaluation parameters such as refrigerating capacity, COP of the refrigerator, water pump efficiency, chilled water distribution coefficient, cooling water distribution coefficient, EER of the cold station and the like cannot be intuitively obtained in the test process.
SUMMERY OF THE UTILITY MODEL
The utility model provides a can dismantle central air conditioning remote measuring device and system can break away from artifical the measurement, to the multinomial parameter real-time measurement of air conditioning system, the accurate dynamic behavior that obtains the air conditioner to measuring device can dismantle, can install fast.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a detachable remote measuring device for a central air conditioner comprises: the device comprises a power supply module, a data acquisition module, a data transmission module and a detachable measuring device. The power module, the data acquisition module and the data transmission module are portable integrated devices. The data acquisition module is connected with the data transmission module, and the data transmission module is in communication connection with the detachable measuring device. The detachable measuring device comprises: temperature measuring device, pressure measuring device, flow measuring device, power measuring device.
Furthermore, the temperature measuring device adopts an inserted temperature sensor and is used for detecting the inlet/outlet water temperature of the chilled water and the inlet/outlet water temperature of the cooling water of the central air conditioner to be measured;
the pressure measuring device adopts a pressure sensor and is used for detecting the inlet/outlet pressure of a freezing water pump and the inlet/outlet pressure of a cooling water pump of the central air conditioner to be measured;
the flow measuring device adopts an externally attached ultrasonic flowmeter and is used for detecting the chilled water flow and the cooling water flow of the central air conditioner to be measured;
the power measuring device adopts an open-close type power transmitter and is used for detecting the power of a water chilling unit, the power of a freezing water pump and the power of a cooling water pump of the central air conditioner to be measured.
The utility model provides a can dismantle central air conditioning remote measurement system, includes can dismantle central air conditioning remote measurement device, cloud platform, customer end to communication connection in proper order.
The detachable central air conditioner remote measuring device collects the test parameters of the central air conditioner system to be tested.
The cloud platform calculates through the test parameter, obtains the performance parameter of central air conditioning system that awaits measuring, includes: refrigerating capacity, COP of the refrigerator, water pump efficiency, chilled water delivery and distribution coefficient, cooling water delivery and distribution coefficient and EER parameters of the cold station;
the cloud platform adopts an index constraint method to evaluate the performance of a water chilling unit, a water pump, a chilled water system and a cooling water system according to the performance parameters of the central air-conditioning system to be measured, and finds out the link with outstanding energy consumption;
and performing full cooling season/full year load prediction according to the measured parameters and meteorological parameters, obtaining a full working condition operation model of the water chilling unit, the water pump and the cooling tower according to the measured parameters, further performing operation strategy optimization by an optimization method by taking the lowest energy consumption as an optimization target to obtain full cooling season/full year energy consumption under different operation strategies, finally obtaining an optimal operation scheme, and sending the performance parameters and the energy-saving scheme of the central air-conditioning system to be tested to the client.
The cloud platform can predict the load of the cooling season of the whole cooling season or the whole year according to the measured parameters and meteorological parameters, obtain the running model of the water chilling unit, the water pump and the cooling tower under the whole working condition according to the measured parameters, further optimize the running strategy, obtain the energy consumption of the cooling season of the whole cooling season or the whole year under different running strategies, and finally obtain the optimal running strategy.
And the client receives and displays the performance parameters and the energy-saving scheme of the central air-conditioning system to be tested for the user to check.
Further, the test parameters of the central air conditioning system to be tested include: the system comprises a chilled water inlet/outlet temperature sensor, a chilled water pump inlet/outlet pressure sensor, a chilled water unit power sensor, a chilled water pump power sensor, a chilled water flow sensor, a chilled water pump inlet/outlet pressure sensor and a chilled water pump outlet/inlet pressure sensor.
Further, the calculation relationship between the test parameters of the central air-conditioning system to be tested and the performance parameters of the central air-conditioning system to be tested is as follows:
refrigerating capacity:
Figure BDA0002285553780000041
cold machine COP:
Figure BDA0002285553780000042
efficiency of chilled water pump:
Figure BDA0002285553780000043
cooling water pump efficiency:
Figure BDA0002285553780000044
chilled water delivery and distribution coefficient:
Figure BDA0002285553780000045
cooling water delivery coefficient:
Figure BDA0002285553780000046
cold station EER:
Figure BDA0002285553780000047
wherein the inlet/outlet temperature of the chilled water is Tin,chilled/Tout,chilledThe temperature of the cooling water inlet/outlet is Tin,cooling/Tout,coolingThe pressure of the inlet/outlet of the refrigerating water pump is Pin,chilled/Pout,chilledThe pressure value of the inlet/outlet of the cooling water pump is Pin,cooling/Pout,coolingThe power of the water chilling unit is NchillerThe power of the chilled water pump is NchilledThe power of the cooling water pump is NcoolingThe flow rate of the freezing water is GchilledCooling water flow rate of GcoolingZ height difference of pressure sensors at inlet and outlet of water pump and c specific heat capacity of fluidpAnd the fluid density is ρ.
The utility model has the advantages that:
the measuring system provided by the utility model can automatically run after the measuring points are completely arranged, the cooperation operation in the traditional testing process is avoided, the field personnel is not needed, the manpower and the occupied area are greatly reduced, the testing process is greatly simplified, and the testing period is shortened; the utility model discloses in, the cloud platform can long-term real-time recording data, and the user can long-rangely monitor the measuring result in real time, just so can obtain air conditioning system's dynamic characteristic, makes the test result more press close to actual operating condition, helps going on of later stage energy-conserving transformation work; the measurement results are all converted into standard analog signals and are uploaded to the cloud platform, a user can remotely monitor test data in real time through a client, and performance evaluation parameters such as refrigerating capacity, COP (coefficient of performance) of a refrigerator, water pump efficiency, chilled water distribution coefficient, cooling water distribution coefficient and cooling station EER (energy efficiency rating) can be intuitively obtained during testing, so that the energy-saving potential of the air conditioning system is directly obtained.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of the device of the present invention;
FIG. 2 is a field test chart of the device of the present invention;
FIG. 3 is a schematic view of the installation of the detachable temperature/pressure sensor in the device of the present invention;
FIG. 4 is a schematic view of an externally attached ultrasonic flowmeter of the present invention;
fig. 5 is a schematic view of the installation of the power transmitter of the present invention.
The device comprises a power supply module 1, a transformer 11, a storage battery 12, a data acquisition module 2, a data transmission module 3, a SIM card 31, a signal transmitting device 32, a temperature measuring device 4, a pressure measuring device 5, a flow measuring device 6, an externally-attached probe 61, a power measuring device 7 and an open-close measuring ring 71.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in further detail with reference to the following embodiments.
The embodiment of the utility model provides a can dismantle central air conditioning remote measuring device, as shown in figure 1, include: the device comprises a power module 1, a data acquisition module 2, a data transmission module 3 and a detachable measuring device. The detachable measuring device is arranged at a part to be measured of the central air conditioner and is in communication connection with the data acquisition module 2. The data acquisition module 2 is connected with the data transmission module 3, and the power supply module 1 is connected with the data acquisition module 2 and the data transmission module 3 and supplies power.
The power module 1 comprises a transformer 11 and a storage battery 12, wherein the input end of the transformer 11 is connected with the output end of the storage battery 12, and the output end of the transformer 11 is the output end of the power module 1.
The detachable measuring device comprises: temperature measuring device 4, pressure measuring device 5, flow measuring device 6, power measuring device 7.
The general installation schematic diagram of field measurement is shown in fig. 2, and the data acquisition module 2 is respectively connected with a temperature measuring device 4, a pressure measuring device 5, a flow measuring device 6 and a power measuring device 7. The temperature measuring device 4 is a detachable plug-in temperature sensor, is a platinum resistor or thermocouple sensor, comprises a transmitter, and is arranged at the inlet and outlet of the cooling water and the chilled water. The power measuring device 7 is an open-close type power transmitter and comprises an open-close type measuring ring 71, wherein the open-close type measuring ring 71 is opened during measurement, and a measured wire is clamped in the open-close type measuring ring 71. The flow measuring device 6 is an external attached ultrasonic flowmeter, which comprises an external attached probe 61, wherein the external attached probe 61 is attached to the wall of a measured pipe during measurement, namely, the flow in the pipe can be measured. The pressure measuring device 5 is a detachable pressure sensor, comprises a pressure transmitter and is arranged at the inlet and the outlet of the freezing water pump and the cooling water pump. The installation schematic diagram of the detachable plug-in temperature sensor and the detachable pressure sensor is shown in fig. 3, the installation schematic diagram of the external-attached ultrasonic flowmeter is shown in fig. 4, and the installation schematic diagram of the open-close type power transmitter is shown in fig. 5.
The data acquisition module 2 adopts a data acquisition device, comprises a plurality of data acquisition channels, adopts standard analog signal communication of 4-20 mA direct current signals or 1-5V direct current voltage signals, and is connected through a standard quick plug.
Data connection is carried out between the data acquisition unit and the data transmission module 3, the SIM card 31 and the signal transmitter 32 are arranged in the data transmission module 3, the data acquisition unit is connected with the signal transmitter 32, and the signal transmitter 32 uploads a signal acquired by the data acquisition unit to the cloud platform through a mobile network.
The embodiment also provides a detachable remote measuring system of the central air conditioner, which comprises a detachable remote measuring device of the central air conditioner, a cloud platform and a client.
The cloud platform analyzes and calculates data acquired by the detachable central air conditioner remote measuring device to obtain refrigerating capacity, COP of the refrigerator, water pump efficiency, chilled water distribution coefficient, cooling water distribution coefficient and EER parameters of the cold station, and analyzes a link with high energy consumption of the air conditioning system by using an index constraint method. The index constraint value may take the following values: the COP of the cold machine is not less than 4, the efficiency of the water pump is not less than 60%, the efficiency of the chilled water delivery and distribution system is not less than 30%, the efficiency of the cooling water delivery and distribution system is not less than 25%, and the EER of the cold station is not less than 2.5.
The cloud platform can predict the load of the cooling season of the whole cooling season or the whole year according to the measured parameters and meteorological parameters, obtain the running model of the water chilling unit, the water pump and the cooling tower under the whole working condition according to the measured parameters, further optimize the running strategy by optimizing methods such as traversal and neural network and the like by taking the lowest energy consumption as an optimization target, obtain the energy consumption of the cooling season of the whole cooling season or the whole year under different running strategies, and finally obtain the optimal running scheme.
And the method is used for performance evaluation to obtain the energy-saving scheme of the central air-conditioning system to be tested.
And the cloud platform sends the data and the energy-saving scheme to the client for the user to check.
The data collected by the data collection module 2 includes: inlet/outlet temperature T of chilled waterin,chilled/Tout,chilledTemperature T of cooling water inlet/outletin,cooling/Tout,coolin(ii) a Inlet/outlet pressure P of freezing water pumpin,chilled/Pout,chilledPressure P at inlet/outlet of cooling water pumpin,cooling/Pout,cooling(ii) a Chiller power NchillerPower N of the chilled water pumpchilledCooling water pump power Ncooling(ii) a Freezing water flow rate GchilledAnd coolWater flow rate Gcooling。
The cloud platform calculates various parameters of the central air conditioner according to the following calculation formula:
refrigerating capacity:
Figure BDA0002285553780000071
cold machine COP:
Figure BDA0002285553780000072
efficiency of chilled water pump:
Figure BDA0002285553780000073
cooling water pump efficiency:
Figure BDA0002285553780000081
chilled water delivery and distribution coefficient:
Figure BDA0002285553780000082
cooling water delivery coefficient:
Figure BDA0002285553780000083
cold station EER:
Figure BDA0002285553780000084
the cloud platform generates a performance evaluation result according to the parameters, and then generates an energy-saving scheme aiming at the evaluation result. And the cloud platform sends the performance data and the energy-saving scheme to the client for the user to check.
The utility model discloses the beneficial effect of utensil does:
(1) the device of the utility model can automatically run after the measuring points are completely arranged, thereby eliminating the matching operation in the traditional testing process and greatly reducing the manpower and the occupied area;
(2) the utility model can read all data visually in the process of measuring point installation, thus completely avoiding invalid tests caused by measuring point installation errors or test instrument faults;
(3) the utility model discloses the device can long-term real-time recording data, and the user can long-rangely monitor the measuring result in real time, just so can obtain air conditioning system's dynamic characteristic, makes the test result more press close to actual operating condition, helps going on of later stage energy-conserving transformation work;
(4) the utility model discloses a measurement system can be used for the performance aassessment at quick automatic acquisition refrigerating output, cold quick-witted COP, water pump efficiency, refrigerated water distribution coefficient, cooling water distribution coefficient, cold station EER isoparametric during the test, can obtain air conditioning system energy-conserving potentiality directly perceived fast.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (4)

1. The utility model provides a can dismantle central air conditioning remote measuring device which characterized in that includes: the device comprises a power supply module, a data acquisition module, a data transmission module and a detachable measuring device; the power module, the data acquisition module and the data transmission module are portable integrated devices;
the data acquisition module is connected with the data transmission module, the data acquisition module is in communication connection with the detachable measuring device, and the power supply module supplies power to the data acquisition module and the data transmission module; the detachable measuring device comprises: temperature measuring device, pressure measuring device, flow measuring device, power measuring device.
2. The removable central air conditioning remote measuring device of claim 1, wherein the temperature measuring device is an insertion type temperature sensor;
the pressure measuring device adopts a pressure sensor;
the flow measuring device adopts an externally attached ultrasonic flowmeter;
the power measuring device adopts an open-close type power transmitter.
3. A detachable remote measuring system of a central air conditioner is characterized by comprising the detachable remote measuring device of the central air conditioner, a cloud platform and a client according to claim 1, which are in communication connection in sequence;
the detachable central air conditioner remote measuring device collects the test parameters of the central air conditioner system to be tested;
the cloud platform calculates through the test parameters to obtain performance parameters of the central air-conditioning system to be tested, and the method comprises the following steps: refrigerating capacity, COP of the refrigerator, water pump efficiency, chilled water delivery and distribution coefficient, cooling water delivery and distribution coefficient and EER parameters of the cold station;
the cloud platform adopts an index constraint method to evaluate the performance of a water chilling unit, a water pump, a chilled water system and a cooling water system according to the performance parameters of the central air-conditioning system to be tested, and finds out the link with outstanding energy consumption;
carrying out full cooling season/full year load prediction according to measured parameters and meteorological parameters, obtaining a full working condition operation model of a water chilling unit, a water pump and a cooling tower according to the measured parameters, further carrying out operation strategy optimization by an optimization method by taking the lowest energy consumption as an optimization target to obtain full cooling season/full year energy consumption under different operation strategies, finally obtaining an optimal operation scheme, and sending performance parameters and an energy-saving scheme of the central air-conditioning system to be tested to the client;
and the client receives and displays the performance parameters and the energy-saving scheme of the central air-conditioning system to be tested for the user to check.
4. The system of claim 3, wherein the test parameters of the central air-conditioning system under test comprise: the system comprises a chilled water inlet/outlet temperature sensor, a chilled water pump inlet/outlet pressure sensor, a chilled water unit power sensor, a chilled water pump power sensor, a chilled water flow sensor, a chilled water pump inlet/outlet pressure sensor and a chilled water pump outlet/inlet pressure sensor.
CN201922048448.1U 2019-11-22 2019-11-22 Detachable remote measuring device and system for central air conditioner Expired - Fee Related CN211262308U (en)

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