CN215723778U - Control system of cold water host based on cold load prediction - Google Patents
Control system of cold water host based on cold load prediction Download PDFInfo
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- CN215723778U CN215723778U CN202121253271.XU CN202121253271U CN215723778U CN 215723778 U CN215723778 U CN 215723778U CN 202121253271 U CN202121253271 U CN 202121253271U CN 215723778 U CN215723778 U CN 215723778U
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Abstract
The utility model discloses a cold load prediction-based control system of a cold water host, which comprises a control device, a water return main pipe, a water supply main pipe, the cold water host and a data acquisition unit, wherein the cold water host and the data acquisition unit are respectively and electrically connected with the control device; the cold water main machine is respectively connected with the water return main pipe and the water supply main pipe; the data acquisition unit comprises a first temperature sensor, a second temperature sensor and a flowmeter, wherein the first temperature sensor is used for detecting the water temperature of the water return main pipe, the second temperature sensor is used for detecting the water temperature of the water supply main pipe, and the flowmeter is used for detecting the water flow of the water supply main pipe; the control device is used for acquiring a real-time cold load detection value and a cold load predicted value and adjusting the capacity output of the cold water main machine; the control system disclosed by the application can adjust the capacity output of the cold water main machine according to the comparison result of the real-time cold load detection value and the cold load prediction value, so that the capacity of the cold water unit can be adjusted in time, and the power consumption of the heating and ventilation system is reduced.
Description
Technical Field
The utility model relates to the technical field of refrigeration equipment of a refrigeration machine room, in particular to a control system of a cold water main machine based on cold load prediction.
Background
At present, the working state of a cold water main machine of a common refrigeration machine room is adjusted according to detection data fed back by a sensor in real time, the common process is that the load of an air side of a corresponding cold supply area, such as an air handling unit, a fan coil and the like, at the tail end of an air conditioner changes first, so that the water temperature of a chilled water supply and return pipe of the cold water main machine changes, and after the corresponding water temperature changes, the cold water main machine adjusts the capacity of the machine set according to the difference between the inlet water temperature of the chilled water or the outlet water temperature of the chilled water and a target value; the whole process has certain hysteresis, and the specific hysteresis degree can be different according to different refrigeration systems; the problem of energy waste of the cold water main engine in the working process is caused by hysteresis in the feedback regulation process.
It is seen that improvements and enhancements to the prior art are needed.
SUMMERY OF THE UTILITY MODEL
In view of the defects of the prior art, the utility model aims to provide a control system of a cold water main machine based on cold load prediction, which can adjust the capacity output of the cold water main machine according to the comparison result of a real-time cold load detection value and a cold load prediction value, realize the timely adjustment of the capacity of a cold water unit and reduce the power consumption of a heating and ventilation system.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a control system of a cold water host based on cold load prediction comprises a control device, a water return main pipe, a water supply main pipe, and the cold water host and a data acquisition unit which are respectively and electrically connected with the control device; the cold water main machine is respectively connected with the water return main pipe and the water supply main pipe; the data acquisition unit comprises a first temperature sensor, a second temperature sensor and a flowmeter, wherein the first temperature sensor is used for detecting the water temperature of the water return main pipe, the second temperature sensor is used for detecting the water temperature of the water supply main pipe, and the flowmeter is used for detecting the water flow of the water supply main pipe; the control device is used for acquiring a real-time cold load detection value and a cold load predicted value and adjusting the capacity output of the cold water main machine.
The control system of the cold water host based on cold load prediction further comprises a water collector and a water distributor, wherein the water collector is connected with the cold water host through the water return main pipe, and the water distributor is connected with the cold water host through the water supply main pipe.
The control system of the cold water host based on cold load prediction further comprises a data processing device, wherein the data processing device comprises a processing unit, a weather obtaining unit and a first communication unit, and the weather obtaining unit and the first communication unit are electrically connected with the processing unit; the processing unit is used for generating a cold load predicted value, and the first communication unit is respectively in communication connection with the data acquisition unit and the control device.
The control system of the cold water main engine based on cold load prediction further comprises an analog-to-digital conversion device, and the data acquisition unit is respectively connected with the control device and the data processing device through the analog-to-digital conversion device.
In the control system of the cold water host based on cold load prediction, the data processing device further comprises a storage unit electrically connected with the processing unit, and the storage unit is used for storing the real-time detection data fed back by the data acquisition unit.
In the control system of the cold water main engine based on cold load prediction, the data acquisition unit further comprises a temperature and humidity sensor for acquiring the temperature and humidity of the outdoor environment and a radiation sensor for acquiring the intensity of solar radiation.
In the control system of the cold water host based on cold load prediction, the control device comprises a second communication unit, the analog-to-digital conversion device comprises a third communication unit, the second communication unit and the third communication unit are respectively in communication connection with the first communication unit, and the second communication unit is in communication connection with the third communication unit.
In the control system of the cold water main machine based on cold load prediction, the cold water main machine comprises a compressor, a capacity regulating slide valve is arranged on the compressor, and the capacity regulating slide valve is used for regulating the capacity output of the cold water main machine.
Has the advantages that:
the utility model provides a control system of a cold water host based on cold load prediction.A control device can calculate a real-time cold load detection value according to the real-time water temperature of a water supply main pipe, the real-time water temperature of a water return main pipe and the real-time water flow of the water supply main pipe which are fed back by a data acquisition unit, and adjust the capacity output of the cold water host according to the comparison result of the real-time cold load detection value and a received cold load prediction value; on the premise of ensuring that the cooling capacity required by the heating and ventilation system is enough, the output capacity of the cold water main machine is timely adjusted, and the running power consumption of the cold water main machine is reduced.
Drawings
FIG. 1 is a connection structure diagram of a cold water main unit, a water separator and a water collector provided by the present invention;
fig. 2 is a system configuration diagram of the control system provided by the present invention.
Description of the main element symbols: the system comprises a water collector 1, a water return header 11, a water separator 2, a water supply header 21, a control device 3, a second communication unit 31, a cold water host 4, a compressor 41, a volume adjusting slide valve 411, a data acquisition unit 5, a first temperature sensor 51, a second temperature sensor 52, a flowmeter 53, a temperature and humidity sensor 54, a radiation sensor 55, a data processing device 6, a processing unit 61, a weather acquisition unit 62, a storage unit 63, a first communication unit 64, an analog-to-digital conversion device 7 and a third communication unit 71.
Detailed Description
The utility model provides a control system of a cold water main engine based on cold load prediction, and in order to make the purpose, technical scheme and effect of the utility model clearer and clearer, the utility model is further described in detail by referring to the attached drawings and embodiments.
In the description of the present invention, it is to be understood that the terms "mounted," "connected," and the like are to be interpreted broadly, and those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.
Referring to fig. 1 and 2, the present invention provides a cold water main control system based on cold load prediction, which includes a control device 3, a return water main pipe 11, a water supply main pipe 21, and a cold water main 4 and a data acquisition unit 5 electrically connected to the control device 3, respectively; the cold water main machine 4 is respectively connected with the water return main pipe 11 and the water supply main pipe 21; the data acquisition unit 5 comprises a first temperature sensor 51, a second temperature sensor 52 and a flowmeter 53, wherein the first temperature sensor 51 is used for detecting the water temperature of the water return main pipe 11, the second temperature sensor 52 is used for detecting the water temperature of the water supply main pipe 21, and the flowmeter 53 is used for detecting the water flow of the water supply main pipe 21; the control device 3 is used for acquiring a real-time cold load detection value and a cold load predicted value and adjusting the capacity output of the cold water main machine 4.
According to the control system disclosed by the utility model, the control device 3 can calculate a real-time cold load detection value according to the real-time water temperature of the water supply main pipe 21, the real-time water temperature of the water return main pipe 11 and the real-time water flow of the water supply main pipe 21 which are fed back by the data acquisition unit 5, and the control device 3 adjusts the capacity output of the cold water main machine 4 according to the comparison result of the real-time cold load detection value and the received cold load prediction value; on the premise of ensuring that the cooling capacity required by the heating and ventilation system is enough, the output capacity of the cold water main machine 4 is timely adjusted, the running power consumption of the cold water main machine 4 is reduced, and the energy waste is reduced.
In one embodiment, the first temperature sensor 51 and the second temperature sensor 52 may be PT1000 platinum resistance temperature sensors, the flow meter 53 may be a magnetic flow meter, and the control device 3 may be a PLC controller; the real-time cold load detection value is set to be Qj, and the calculation mode of the Qj is specifically as follows:
specific heat x density x (mains supply temperature-return mains supply temperature) x mains supply water flow ÷ 3600
Wherein the specific heat is 4.1868KJ/Kg. ℃, the density is 1000Kg/m3, the temperature is unit, and the water flow is unit m 3/h.
Further, referring to fig. 1 and fig. 2, the control system further includes a water collector 1 and a water separator 2, the water collector 1 is connected to the cold water main unit 4 through the water return main pipe 11, and the water separator 2 is connected to the cold water main unit 4 through the water supply main pipe 21; when the heating and ventilation system comprises a plurality of cold water hosts, the water collector 1 can be respectively connected with the plurality of cold water hosts through the return water main pipe 11, and the water distributor 2 can be respectively connected with the plurality of cold water hosts through the water supply main pipe 21.
Further, referring to fig. 2, the control system further includes a data processing device 6, where the data processing device 6 includes a processing unit 61, and a weather obtaining unit 62 and a first communication unit 64 electrically connected to the processing unit 61; the processing unit 61 is configured to generate a predicted value of the cooling load, and the first communication unit 64 is in communication connection with the data acquisition unit 5 and the control device 3, respectively; the weather obtaining unit 62 is configured to obtain network-published weather information for the future 24 hours, including temperature, humidity, irradiance, and the like; the processing unit 61 may generate a predicted value of the cooling load according to the weather information of 24 hours in the future; in one embodiment, the data processing apparatus 6 may be a computer device.
Further, referring to fig. 2, the control system further includes an analog-to-digital conversion device 7, the data acquisition unit 5 is respectively connected to the control device 3 and the data processing device 6 through the analog-to-digital conversion device 7, and the analog-to-digital conversion device 7 is configured to convert an analog signal fed back by the data acquisition unit 5 into a digital signal; in one embodiment, the analog-to-digital conversion device 7 is a PLC controller capable of implementing analog-to-digital conversion in the prior art.
Further, referring to fig. 2, the data processing apparatus 6 further includes a storage unit 63 electrically connected to the processing unit 61, where the storage unit 63 is used for storing the real-time detection data fed back by the data acquisition unit 5; the storage unit 63 is arranged, so that a user or a technician can conveniently inquire historical data, and a prediction method of a cold load prediction value can be improved conveniently in the follow-up process or the work of a heating ventilation air conditioner can be improved conveniently; in one embodiment, the storage unit 63 is a memory within a computer device.
Further, referring to fig. 2, the data acquisition unit 5 further includes a temperature and humidity sensor 54 for acquiring the temperature and humidity of the outdoor environment, and a radiation sensor 55 for acquiring the intensity of solar radiation; in the actual working process of the control system, the temperature and humidity sensor 54 and the radiation sensor 55 can be arranged in an unshielded outdoor space; the temperature and humidity sensor 54 and the radiation sensor 55 are arranged, so that the data processing device 6 can compare the difference between the actual weather information and the acquired future weather information, and the data processing device 6 can adjust the prediction method of the cold load predicted value according to the difference degree, thereby improving the adjustment effect of the output capacity of the water chilling unit; in one embodiment, the temperature and humidity sensor 54 may be an outdoor temperature and humidity integrated sensor, and the radiation sensor 55 may be an optoelectronic solar radiation sensor.
Further, referring to fig. 2, the control device 3 includes a second communication unit 31, the analog-to-digital conversion device 7 includes a third communication unit 71, the second communication unit 31 and the third communication unit 71 are respectively in communication connection with the first communication unit 64, and the second communication unit 31 is in communication connection with the third communication unit 71; in one embodiment, the first communication unit 64, the second communication unit 31, and the third communication unit 71 may be WLAN chips or WIFI chips.
Further, referring to fig. 2, the main cold water unit 4 includes a compressor 41, the compressor 41 is provided with a capacity regulating slide valve 411, the capacity regulating slide valve 411 is used for regulating the output capacity of the main cold water unit 4, and specifically, when the capacity output of the main cold water unit 4 needs to be regulated, the main cold water unit 4 regulates the position of the capacity regulating valve according to the capacity increasing rate or the capacity decreasing rate fed back by the control device 3, so as to regulate the output capacity of the main cold water unit 4.
In other embodiments, the heating and ventilation system of the refrigeration machine room may include a plurality of cold water hosts, each cold water host corresponding to one number; when the output capacity of the cold water main machine needs to be increased, the cold water main machine can be started gradually from small to large according to the number; when the output capacity of the cold water main machine needs to be reduced, the cold water main machine can be gradually closed from large to small according to the number.
It should be understood that the technical solutions and the inventive concepts according to the present invention may be equally replaced or changed by those skilled in the art, and all such changes or substitutions should fall within the protection scope of the present invention.
Claims (8)
1. A control system of a cold water host based on cold load prediction is characterized by comprising a control device, a water return main pipe, a water supply main pipe, a cold water host and a data acquisition unit, wherein the cold water host and the data acquisition unit are respectively and electrically connected with the control device; the cold water main machine is respectively connected with the water return main pipe and the water supply main pipe; the data acquisition unit comprises a first temperature sensor, a second temperature sensor and a flowmeter, wherein the first temperature sensor is used for detecting the water temperature of the water return main pipe, the second temperature sensor is used for detecting the water temperature of the water supply main pipe, and the flowmeter is used for detecting the water flow of the water supply main pipe; the control device is used for acquiring a real-time cold load detection value and a cold load predicted value and adjusting the capacity output of the cold water main machine.
2. The cold load prediction-based control system of a cold water host according to claim 1, further comprising a water collector and a water separator, wherein the water collector is connected with the cold water host through the water return header pipe, and the water separator is connected with the cold water host through the water supply header pipe.
3. The cold water main control system based on cold load prediction as claimed in claim 1, further comprising a data processing device, wherein the data processing device comprises a processing unit, and a weather obtaining unit and a first communication unit electrically connected to the processing unit; the processing unit is used for generating a cold load predicted value, and the first communication unit is respectively in communication connection with the data acquisition unit and the control device.
4. The cold water main control system based on cold load prediction as claimed in claim 3, further comprising an analog-to-digital conversion device, wherein the data acquisition unit is connected to the control device and the data processing device through the analog-to-digital conversion device respectively.
5. The cold water main control system based on cold load prediction as claimed in claim 3, wherein the data processing device further comprises a storage unit electrically connected to the processing unit, the storage unit is used for storing the real-time detection data fed back by the data acquisition unit.
6. The cold water main control system based on cold load prediction as claimed in claim 1, wherein the data acquisition unit further comprises a temperature and humidity sensor for acquiring outdoor ambient temperature and humidity and a radiation sensor for acquiring solar radiation intensity.
7. The system of claim 4, wherein the control device comprises a second communication unit, the analog-to-digital conversion device comprises a third communication unit, the second and third communication units are respectively in communication with the first communication unit, and the second communication unit is in communication with the third communication unit.
8. The cold water main control system based on cold load prediction as claimed in claim 1, wherein the cold water main comprises a compressor, and a capacity regulating slide valve is arranged on the compressor and used for regulating the capacity output of the cold water main.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121253271.XU CN215723778U (en) | 2021-06-04 | 2021-06-04 | Control system of cold water host based on cold load prediction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202121253271.XU CN215723778U (en) | 2021-06-04 | 2021-06-04 | Control system of cold water host based on cold load prediction |
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| CN215723778U true CN215723778U (en) | 2022-02-01 |
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| CN202121253271.XU Active CN215723778U (en) | 2021-06-04 | 2021-06-04 | Control system of cold water host based on cold load prediction |
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2021
- 2021-06-04 CN CN202121253271.XU patent/CN215723778U/en active Active
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