CN111256314A - Control system of high-efficient central air conditioning - Google Patents
Control system of high-efficient central air conditioning Download PDFInfo
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- CN111256314A CN111256314A CN201811462110.4A CN201811462110A CN111256314A CN 111256314 A CN111256314 A CN 111256314A CN 201811462110 A CN201811462110 A CN 201811462110A CN 111256314 A CN111256314 A CN 111256314A
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- control system
- water pump
- air conditioner
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0003—Exclusively-fluid systems
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control system of a central air conditioner, which comprises a cooling tower set, a cooling water pump set, a chilled water pump set and a control system of a water chilling unit; the cooling tower group control system comprises a cooling tower data processor, a frequency converter and a temperature and humidity sensor, wherein the frequency converter and the temperature and humidity sensor are arranged on each cooling tower; the cooling water pump set control system comprises a cooling water pump data processor, a flowmeter and a frequency converter which are arranged on each cooling water pump, and a temperature sensor; the chilled water pump set control system comprises a chilled water pump data processor, a flowmeter and a frequency converter which are arranged on each chilled water pump, and a temperature sensor; the water chilling unit control system comprises an environment temperature and humidity sensor and a chiller data processor arranged on each chiller; the operation frequency of each element is adjusted by adopting a small amount of sensors to monitor each element in the refrigeration system and controlling the elements by a frequency converter, so that the refrigeration system of the central air conditioner and even a tail end house lead-in end are optimally controlled, and the aim of global optimization is fulfilled.
Description
Technical Field
The invention relates to the technical field of central air conditioning energy control, in particular to a control system of an efficient central air conditioner.
Background
At present, energy supply of all countries in the world is once tense, and the problem of energy conservation becomes one of the most concerned primary problems of all countries in the world. Although China belongs to a large resource country, the energy demand is explosively increased due to rapid economic development, and meanwhile, energy conservation and environmental protection are urgent in China due to the reasons of long-term unreasonable development and utilization, light energy conservation consciousness and the like of people.
With the development of society and the progress of times, the building area per capita is continuously increased, the requirements of people on the building environment are higher and higher, and meanwhile, with the construction of large-scale and ultra-large-scale public buildings, the large-scale central air-conditioning system is widely applied.
However, the building is provided with the central air conditioner, so that high-quality environmental space is provided for people, and meanwhile, the electric energy consumption of the building is greatly increased. In the existing energy consumption of large buildings in China, the energy consumption of a central air conditioner reaches 50% -60% of the total energy consumption of the buildings, and the central air conditioner shows a trend of increasing year by year and occupies a large proportion of energy. Because a large number of central air conditioners are commonly applied to markets, schools, enterprises and public institutions and public buildings, the comprehensive energy conservation of the central air conditioners is more important. In the prior art, most central air conditioners are controlled in a dispersed and independent mode, are greatly influenced by considered factors, and are controlled in a unified mode and managed in a rough mode, so that energy consumption cannot be managed and controlled accurately, and a large amount of electric energy is consumed.
Disclosure of Invention
The invention provides an energy-saving and efficient control system which can monitor the running condition and the energy consumption condition of a central air-conditioning refrigeration system in an all-around and real-time manner and can actively control each element in the refrigeration system.
In order to solve the above-mentioned prior art problems, the present invention provides a control system of a high-efficiency central air conditioner, the control system controls the refrigeration system of the central air conditioner, the refrigeration system of the central air conditioner comprises a cooling tower set, a cooling water pump set, a chilled water pump set and a water chilling unit, the chilled water pump set is connected with the air conditioner user inlet end through a transmission and distribution network, the control system comprises a cooling tower set control system, a cooling water pump set control system, a chilled water pump set control system and a water chilling unit control system; the cooling tower group control system comprises a cooling tower data processor, a frequency converter arranged on each cooling tower and a temperature and humidity sensor arranged at a water supply end of the cooling tower group; the cooling water pump set control system comprises a cooling water pump data processor, a flowmeter and a frequency converter which are arranged on each cooling water pump, and temperature sensors which are arranged at a water supply end and a water return end of the cooling water pump set; the chilled water pump set control system comprises a chilled water pump data processor, a flow meter and a frequency converter which are arranged on each chilled water pump, and temperature sensors which are arranged at a water supply end and a water return end of the chilled water pump set; the water chilling unit control system comprises an environment temperature and humidity sensor and a chiller data processor arranged on each chiller.
In a first possible implementation manner, the control system further includes a control system of an air conditioner user side, where the control system of the air conditioner user side includes an air conditioner group data processor, an air supply temperature sensor and a frequency converter installed at an air supply outlet of the air conditioner, and a return air temperature sensor installed at a return air inlet of the air conditioner.
In combination with the first possible implementation manner, in a second possible implementation manner, the control system of the air conditioner inlet further includes a fresh air valve actuator disposed at a side close to the air conditioner return air inlet, and a water valve actuator disposed at a middle section of the air conditioner supply air inlet and the air conditioner return air inlet.
With reference to the first possible implementation manner, in a third possible implementation manner, the refrigeration system of the central air conditioner further includes a cooling water circulation pipeline and a chilled water circulation pipeline, the cooling water pump set is installed on the cooling water circulation pipeline, and a cooling water inlet and a cooling water outlet on the cooling tower set are communicated with the cooling water circulation pipeline; the chilled water pump set is installed on the chilled water circulation pipeline, a chilled water inlet and a chilled water outlet on the water chilling unit are communicated with the chilled water circulation pipeline, a chilled water inlet and a chilled water outlet on the indoor end of the air conditioner are communicated with the chilled water circulation pipeline, and the cooling tower is communicated with the chilled water circulation pipeline after passing through the water chilling unit through the cooling water inlet and the cooling water outlet.
The technical scheme provided by the invention has the beneficial effects that the operation frequency of each element is adjusted by adopting a small quantity of sensors to monitor each element in the central air-conditioning refrigeration system and controlling by using the frequency converter, so that the optimization control of the central air-conditioning refrigeration system and even the tail end house-entrance end is realized, and the purposes of global optimization, high efficiency, energy saving and water saving are achieved.
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 description of the embodiments will be briefly introduced 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 to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram illustrating a connection structure of components of a refrigeration system of a central air conditioner according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The control system of the high-efficiency central air conditioner provided by the specific embodiment of the invention mainly controls a refrigeration system of the central air conditioner and an air conditioner inlet end 5 of the central air conditioner, wherein the refrigeration system of the central air conditioner comprises a cooling tower set, a cooling water pump set, a chilled water pump set and a water chilling unit as shown in figure 1, the cooling tower set, the cooling water pump set, the chilled water pump set and the water chilling unit respectively comprise a plurality of cooling towers 1, cooling water pumps 2, chilled water pumps 3 and coolers 4, and the plurality of chilled water pumps 3 of the chilled water pump set are connected with the air conditioner inlet end 5 through a transmission and distribution network pipe 6; in addition, a cooling water circulation pipeline and a chilled water circulation pipeline are further arranged in the refrigerating system of the central air conditioner, the cooling water pump 2 is installed on the cooling water circulation pipeline, a cooling water inlet and a cooling water outlet on the cooling tower set are communicated with the cooling water circulation pipeline, the chilled water pump 3 is installed on the chilled water circulation pipeline, a chilled water inlet and a chilled water outlet of a cold machine 4 of the water chilling unit are communicated with the chilled water circulation pipeline, and a chilled water inlet and a chilled water outlet on the air conditioner user inlet end 5 are communicated with the chilled water circulation pipeline; the large circulation of the whole system is that the cooling tower 1 is connected with the chilled water circulation pipeline through a cooling water inlet and a cooling water outlet via the cold machine 4.
The control system of the embodiment comprises a cooling tower set control system, a cooling water pump set control system, a chilled water pump set control system, a water chilling unit control system and a control system of an air conditioner inlet end.
The control system for the refrigeration system of the central air conditioner and the control system for the air conditioner user end 5 are respectively controlled as follows, a cooling tower data processor is installed on the whole system for the control system of the cooling tower group, a frequency converter is installed on each cooling tower 1, a temperature and humidity sensor for measuring outdoor environment is installed at the water supply end of the cooling tower group, the fan frequency of the cooling tower 1 is intelligently adjusted according to the detected temperature and humidity value of the outdoor environment by the cooling tower data processor, each cooling tower 1 is provided with an independent frequency converter, the frequency of a single cooling tower 1 can be independently adjusted, and the energy conservation and the high efficiency are realized.
The control system of the cooling water pump set comprises a cooling water pump data processor arranged on the whole cooling water pump set, a flowmeter and a frequency converter arranged on each cooling water pump 2, and temperature sensors arranged at the cooling water supply end and the cooling water return end of the two ends of the whole cooling water pump set; the temperature sensors at the cooling water supply end and the return water end transmit sensed water temperature to the cooling water pump data processor, the cooling water pump data processor executes an instruction of intelligently and logically adjusting water outlet temperature according to two water temperatures, controls the frequency converter to adjust the frequency of each cooling water pump 2, records the flow of each cooling water pump 2 through a flowmeter, transmits the value to the cooling water pump data processor, monitors the flow of the cooling water pump 2 in real time, and timely adjusts the water pump frequency, so that the requirement of ensuring the water outlet temperature value is met.
The control system of the chilled water pump set comprises a chilled water pump data processor arranged on the whole chilled water pump set, a flow meter and a frequency converter arranged on each chilled water pump 3, and temperature sensors arranged at the water supply end and the water return end of the two ends of the whole chilled water pump set; the two temperature sensors at the water supply end and the water return end transmit sensed temperatures to the freezing water pump data processor in real time, the freezing water pump data processor calculates system loads in real time, the water return temperature value is adjusted according to the calculated system load execution function logic, namely, the frequency converter is controlled to adjust the frequency of each freezing water pump 3 so as to ensure that the water return temperature value meets a water return target value, and the flow meter monitors the flow value of the freezing water pumps 3 in real time and feeds the flow value back to the freezing water pump data processor, so that the purposes of real-time monitoring and real-time adjustment are achieved.
The control system of the water chilling unit comprises an environment temperature and humidity sensor arranged on the whole structure and a chiller data processor arranged on each chiller, wherein the environment temperature and humidity sensor acquires the outdoor environment temperature and humidity in real time and calculates the load of the system, executes an intelligent and logical outlet water temperature dynamic reset instruction, monitors the load of the water chilling unit in real time and adjusts the load, and optimal control is achieved.
The control system of the air conditioner inlet end comprises an air conditioner group data processor, an air supply temperature sensor and a frequency converter which are arranged at an air conditioner air supply outlet, and a return air temperature sensor which is arranged at an air conditioner return air inlet, wherein a fresh air valve actuator is also arranged at one side close to the air conditioner return air inlet, a water valve actuator is also arranged at the positions of the air conditioner air supply outlet and the middle section of the air conditioner return air inlet, the air volume of the air conditioner air supply outlet is adjusted in real time according to the set temperature, and a fresh air valve and a water valve are additionally arranged at the return air inlet to control the return air volume and the return air.
The data processor in the embodiment takes an artificial intelligence optimization algorithm as a core, adopts 'bottom layer absolute optimization + global intelligence optimization' as a framework, adopts a small number of sensors for detection, and takes free flexible variable frequency control as a means, thereby providing an efficient control system of the central air conditioner.
According to the technical scheme provided by the embodiment, the operating frequency of each element is adjusted by adopting a small amount of sensors to monitor each element in the central air-conditioning refrigeration system and controlling the elements by using the frequency converter, so that the central air-conditioning refrigeration system and even a tail end service entrance end are optimally controlled, and the purposes of global optimization, high efficiency, energy saving and water saving are achieved.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and it is intended that all changes or modifications within the technical scope of the present invention that may occur to those skilled in the art are included in the present invention.
Claims (4)
1. A control system of a high-efficient central air conditioner, the said control system controls the refrigerating system of the central air conditioner, the refrigerating system of the said central air conditioner includes cooling tower group, cooling water pump group, refrigerated water pump group and water chilling unit, the said refrigerated water pump group is connected with end of entering the household of air conditioner through the network management of transmission and distribution, characterized by that, the said control system includes control system of the cooling tower group, control system of the refrigerated water pump group and water chilling unit control system; the cooling tower group control system comprises a cooling tower data processor, a frequency converter arranged on each cooling tower and a temperature and humidity sensor arranged at a water supply end of the cooling tower group; the cooling water pump set control system comprises a cooling water pump data processor, a flowmeter and a frequency converter which are arranged on each cooling water pump, and temperature sensors which are arranged at a water supply end and a water return end of the cooling water pump set; the chilled water pump set control system comprises a chilled water pump data processor, a flow meter and a frequency converter which are arranged on each chilled water pump, and temperature sensors which are arranged at a water supply end and a water return end of the chilled water pump set; the water chilling unit control system comprises an environment temperature and humidity sensor and a chiller data processor arranged on each chiller.
2. The control system of claim 1, further comprising a control system of an air conditioner user side, wherein the control system of the air conditioner user side comprises an air conditioner group data processor, a supply air temperature sensor and a frequency converter installed at an air conditioner supply outlet, and a return air temperature sensor installed at an air conditioner return outlet.
3. The system of claim 2, further comprising a fresh air valve actuator disposed at a side of the air conditioner inlet, and a water valve actuator disposed at a middle portion between the air conditioner outlet and the air conditioner inlet.
4. The control system of a high-efficiency central air conditioner according to claim 1, wherein the refrigeration system of the central air conditioner further comprises a cooling water circulation pipeline and a chilled water circulation pipeline, the cooling water pump set is installed on the cooling water circulation pipeline, and a cooling water inlet and a cooling water outlet on the cooling tower set are communicated with the cooling water circulation pipeline; the chilled water pump set is installed on the chilled water circulation pipeline, a chilled water inlet and a chilled water outlet on the water chilling unit are communicated with the chilled water circulation pipeline, a chilled water inlet and a chilled water outlet on the indoor end of the air conditioner are communicated with the chilled water circulation pipeline, and the cooling tower is communicated with the chilled water circulation pipeline after passing through the water chilling unit through the cooling water inlet and the cooling water outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811462110.4A CN111256314A (en) | 2018-12-03 | 2018-12-03 | Control system of high-efficient central air conditioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811462110.4A CN111256314A (en) | 2018-12-03 | 2018-12-03 | Control system of high-efficient central air conditioning |
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| Publication Number | Publication Date |
|---|---|
| CN111256314A true CN111256314A (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811462110.4A Withdrawn CN111256314A (en) | 2018-12-03 | 2018-12-03 | Control system of high-efficient central air conditioning |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112484251A (en) * | 2020-11-17 | 2021-03-12 | 珠海格力电器股份有限公司 | Air conditioner outdoor unit water supply temperature control method and device, controller and air conditioner |
-
2018
- 2018-12-03 CN CN201811462110.4A patent/CN111256314A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112484251A (en) * | 2020-11-17 | 2021-03-12 | 珠海格力电器股份有限公司 | Air conditioner outdoor unit water supply temperature control method and device, controller and air conditioner |
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Application publication date: 20200609 |