CN110131802B - Air conditioning system and control method thereof - Google Patents
Air conditioning system and control method thereof Download PDFInfo
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- CN110131802B CN110131802B CN201910402426.2A CN201910402426A CN110131802B CN 110131802 B CN110131802 B CN 110131802B CN 201910402426 A CN201910402426 A CN 201910402426A CN 110131802 B CN110131802 B CN 110131802B
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- air conditioner
- conditioning system
- conditioner external
- air conditioning
- air
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
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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
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
- F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention discloses an air conditioning system and a control method thereof, wherein the air conditioning system comprises a control device, a first air conditioner external unit arranged at a first height outside a building and a second air conditioner external unit arranged at a second height outside the building, when the air conditioning system runs, the first air conditioner external unit and the second air conditioner external unit respectively detect respective refrigerant temperature values and external environment temperature values of positions of the first air conditioner external unit and the second air conditioner external unit in real time, the control device is used for comparing the refrigerant temperature values of the two air conditioner external units with the external environment temperature values of the positions of the two air conditioner external units, and the air conditioner external unit with the larger temperature difference value is selected to work. By adopting the technical scheme of the invention, the refrigeration efficiency of the air conditioning system can be improved.
Description
Technical Field
The invention relates to the field of motor control, in particular to an air conditioning system and a control method thereof.
Background
On land, the air temperature drops by 0.6 ℃ for about every 100 m rise, thus forming an atmospheric temperature gradient with gradual temperature drop with increasing altitude, which is constantly changing under the influence of solar radiation, water currents and ground cover.
The existing air conditioning system is based on Carnot and reverse Carnot circulation, low-temperature and low-pressure liquid refrigerant enters an evaporator to be evaporated and absorb heat, a large amount of heat Q1 is absorbed from air, the refrigerant after being evaporated and absorbed heat enters a compressor in a gaseous form and is compressed to become high-temperature and high-pressure refrigerant, and the heat stored in the refrigerant at the moment is divided into two parts: a part of the heat absorbed from the air Q1 and a part of the heat Q2 into which the electric energy input into the compressor is converted when compressing the refrigerant; the compressed high-temperature and high-pressure refrigerant enters a heat exchanger, the heat Q (Q1 + Q2) contained in the refrigerant is released to the external environment entering a condenser, the refrigerant after releasing the heat enters an evaporator in a liquid state, and the heat dissipation efficiency of the condenser per unit time is related to the refrigeration speed and the refrigeration efficiency of an air conditioner: heat dissipation per unit time
On the premise that the air mass flow W and the isobaric specific heat capacity of the air are not changed, the larger the ambient temperature around the condenser is, the more obvious the heat dissipation efficiency is, and the Carnot cycle efficiency is obvious.
In recent years, with the increasing of extreme cold and extreme heat phenomena caused by greenhouse effect, people put higher demands on the quick refrigerating capacity and refrigerating efficiency of air conditioners, and the problems of quick refrigerating and energy saving are still sought.
Disclosure of Invention
The present invention is directed to solve the above problems of the prior art, and an object of the present invention is to provide an air conditioning system and a control method thereof, so as to improve the cooling capacity and cooling efficiency of an air conditioner.
The embodiment of the invention provides an air conditioning system which comprises a control device, a first air conditioner external unit and a second air conditioner external unit, wherein the first air conditioner external unit is arranged at a first height outside a building, the second air conditioner external unit is arranged at a second height outside the building, when the air conditioning system runs, the first air conditioner external unit and the second air conditioner external unit respectively detect respective refrigerant temperature values and external environment temperature values of positions of the first air conditioner external unit and the second air conditioner external unit in real time, the control device is used for comparing the refrigerant temperature values of the two air conditioner external units with the external environment temperature values of the positions of the two air conditioner external units, and the air conditioner external unit with the.
In the embodiment of the invention, the control device is connected with a big data service center arranged at a cloud end, the big data service center is used for providing spatial temperature gradient distribution data in an area where the air conditioning system is located, and the control device is used for respectively acquiring the environmental temperature values of the heights of the two air conditioning outdoor units according to the spatial temperature gradient distribution data and the height information of the two air conditioning outdoor units.
In the embodiment of the invention, when the comparison relationship between the refrigerant temperature values of the two air conditioner external units and the temperature difference values of the external environment temperature values of the positions of the two air conditioner external units changes, whether the external environment temperature changes of the positions of the two air conditioner external units are instantaneous fluctuation is judged according to the spatial temperature gradient distribution data, if the external environment temperature changes, the current states of the two air conditioner external units are kept unchanged, and if the external environment temperature changes of the two air conditioner external units are instantaneous fluctuation, the air conditioner external units are switched to the air conditioner external unit with a larger temperature difference value.
In the embodiment of the present invention, the manner of determining whether the external environment temperature change at the position of the external unit of the air conditioner is instantaneous fluctuation is as follows:
and judging whether the difference value between the external environment temperature of the position of the air conditioner external unit and the environment temperature of the height of the air conditioner external unit provided in the space temperature gradient distribution data exceeds a set range, and if so, judging the air conditioner external unit to be instantaneously fluctuated.
In the embodiment of the present invention, the big data service center is further in communication connection with the first air conditioner external unit and the second air conditioner external unit, and is configured to receive external environment temperature data provided by the first air conditioner external unit and the second air conditioner external unit and perform big data processing.
In the embodiment of the invention, the first air conditioner is arranged at the top of the building, and the second air conditioner is arranged at the bottom of the building.
In an embodiment of the present invention, a method for controlling an air conditioning system is further provided, where the air conditioning system includes a first air conditioner external unit disposed outside a building at a first height and a second air conditioner external unit disposed outside the building at a second height, and the method includes:
when the air conditioning system runs, the first air conditioner external unit and the second air conditioner external unit respectively detect respective refrigerant temperature values and external environment temperature values of positions of the first air conditioner external unit and the second air conditioner external unit in real time, the air conditioning system compares the refrigerant temperature values of the two air conditioner external units with the temperature difference values of the external environment temperature values of the positions of the two air conditioner external units, and the air conditioner external unit with the larger temperature difference value is selected to work.
Compared with the prior art, the air conditioning system and the control method thereof adopt the first air conditioner external unit arranged at the first height outside the building and the second air conditioner external unit arranged at the second height outside the building, when the air conditioning system operates, the first air conditioner external unit and the second air conditioner external unit respectively detect the respective refrigerant temperature value and the external environment temperature value of the position of the first air conditioner external unit and the second air conditioner external unit in real time, the control device is used for comparing the temperature difference value between the refrigerant temperature values of the two air conditioner external units and the external environment temperature value of the positions of the two air conditioner external units, because the different environmental temperatures of the air conditioner external units with different heights lead to different temperature difference values between the refrigerant temperature value and the environmental temperature, the air conditioner external unit with a larger temperature difference value is selected to work, therefore, the heat dissipation efficiency of the condenser is improved, the refrigeration speed of the air conditioning equipment is improved, and the energy consumption is reduced.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioning system according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a large data center according to an embodiment of the present invention.
Fig. 3 is a control flowchart of the air conditioning system in the embodiment of the present invention.
Detailed Description
As shown in fig. 1, in an embodiment of the present invention, an air conditioning system is provided, which includes a control device 1, a first outdoor air conditioner 2 disposed at a first height outside a building, and a second outdoor air conditioner 3 disposed at a second height outside the building, where the control device 1 is connected to a cloud-based big data service center 4.
The first air conditioner external unit 2 and the second air conditioner external unit 3 are both provided with temperature sensors for respectively detecting the respective refrigerant temperature value and the external environment temperature value of the position of the refrigerant temperature value in real time. The control device 1 is used for comparing the temperature difference value between the refrigerant temperature values of the two air conditioner external units and the external environment temperature value of the position where the two air conditioner external units are located, and selecting the air conditioner external unit with the larger temperature difference value to work.
As shown in fig. 2, the big data service center 4 is used to provide spatial temperature gradient distribution data in a plurality of areas. It should be noted that, the big data service center 4 may be connected to a weather forecast system of a city, and generate spatial temperature gradient distribution data in a plurality of areas according to detection results of gradient spatial temperatures of the plurality of areas in the city in the weather forecast system of the city, and provide the spatial temperature gradient distribution data to the air conditioning systems in the respective areas. Further, the big data service center 4 is also in communication connection with the first air conditioner external unit 2 and the second air conditioner external unit 3, and is configured to receive external environment temperature data provided by the first air conditioner external unit 2 and the second air conditioner external unit 3 and perform big data processing, and when the big data service center 4 obtains enough external environment temperature data, perform big data processing on the external environment temperature data to obtain spatial temperature gradient distribution data.
In the embodiment of the invention, when the air conditioning system is installed in a building, according to the spatial temperature gradient distribution data provided by the big data service center 4 and by utilizing the characteristic that each height in a spatial range corresponds to different temperatures, the double-outdoor-unit air conditioning equipment is designed, and the temperature difference objectively existing in the temperature gradient model is obtained through different heights installed in the building, so that the heat dissipation efficiency of the condenser is improved. In general, the difference in the ambient temperature between the top floor and the bottom floor of the building is the largest, and therefore, the first air conditioner 2 may be disposed at the top of the building and the second air conditioner 3 may be disposed at the bottom of the building.
As shown in fig. 3, the control process of the air conditioning system is as follows:
when the air conditioning system is running (cooling or heating), the first air conditioner outdoor unit 2 and the second air conditioner outdoor unit 3 respectively detect respective refrigerants in real timeThe temperature value and the external environment temperature value of the position of the temperature value are compared, and the control device 1 compares the temperature difference value between the refrigerant temperature values of the two air conditioner external units and the external environment temperature value of the position of the two air conditioner external units (temperature value and external environment temperature value of the position of the two air conditioner external units)
) And selecting an air conditioner external unit with a large temperature difference value to work, wherein the heat dissipation capacity of the condenser of the air conditioner external unit in unit time is increased, so that the Carnot cycle is accelerated, and the refrigeration speed of the air conditioning equipment is increased.
When the comparison relationship between the refrigerant temperature values of the two air conditioner external units and the temperature difference values of the external environment at the positions of the two air conditioner external units changes, whether the external environment temperature changes of the positions of the two air conditioner external units are instantaneous fluctuation is judged according to the spatial temperature gradient distribution data provided by the big data service center 4, if the external environment temperature changes are instantaneous fluctuation, the current states of the two air conditioner external units are kept unchanged, otherwise, the air conditioner external units with larger temperature difference values are switched to work, and therefore the stable operation of the air conditioning system is guaranteed. The mode of judging whether the external environment temperature change of the position of the air conditioner external unit is instantaneous fluctuation is as follows:
and judging whether the difference value between the external environment temperature of the position of the air conditioner external unit and the environment temperature of the height of the air conditioner external unit, which is provided by the space temperature gradient distribution data, exceeds a set range, if so, judging that the air conditioner external unit is instantaneously fluctuated, otherwise, indicating that the external environment temperature is also changed, and judging that the environment temperature of the air conditioner external unit is changed along with the large environment and is not instantaneously fluctuated.
In summary, the air conditioning system of the present invention employs a first air conditioner external unit disposed at a first height outside a building and a second air conditioner external unit disposed at a second height outside the building to perform heat exchange operation, when the air conditioning system is operating, the first air conditioner external unit and the second air conditioner external unit respectively detect respective refrigerant temperature values and external environment temperature values of positions thereof in real time, the control device is configured to compare temperature difference values between the refrigerant temperature values of the two air conditioner external units and the external environment temperature values of the positions thereof, and since the environment temperatures of the air conditioner external units at different heights are different, the temperature difference values between the refrigerant temperature values and the environment temperatures are different, the air conditioner external unit with a larger temperature difference value is selected to perform operation, thereby improving the heat dissipation efficiency of the condenser, improving the refrigeration speed of the air conditioning apparatus, and reducing energy consumption.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The utility model provides an air conditioning system, its characterized in that includes controlling means, sets up in the outer first outer machine of air conditioner of first height outside the building and sets up in the outer machine of second air conditioner of second height outside the building, there is the difference in temperature in first height with the external environment temperature value of second height, when air conditioning system moves, the outer machine of first air conditioner with the outer machine of second air conditioner detects respective refrigerant temperature value and the external environment temperature value of its position respectively in real time, controlling means is used for comparing the difference in temperature value between the refrigerant temperature value of the outer machine of two air conditioners and the external environment temperature value of its position, selects the outer machine of the great air conditioner of difference in temperature value to work.
2. The air conditioning system according to claim 1, wherein the control device is connected to a cloud-based big data service center, the big data service center is configured to provide spatial temperature gradient distribution data in an area where the air conditioning system is located, and the control device is configured to obtain the ambient temperature values of the heights of the two outdoor air conditioners according to the spatial temperature gradient distribution data and the height information of the two outdoor air conditioners.
3. The air conditioning system of claim 2, wherein the big data service center is further communicatively connected to the first outdoor unit and the second outdoor unit for receiving and processing the external environment temperature data provided by the first outdoor unit and the second outdoor unit.
4. The air conditioning system of claim 1, wherein the first outdoor unit is disposed at a top of a building, and the second outdoor unit is disposed at a bottom of the building.
5. A control method of an air conditioning system is characterized in that the air conditioning system comprises a first air conditioner external unit arranged at a first height outside a building and a second air conditioner external unit arranged at a second height outside the building, and a temperature difference exists between external environment temperature values of the first height and the second height, and the method comprises the following steps:
when the air conditioning system runs, the first air conditioner external unit and the second air conditioner external unit respectively detect respective refrigerant temperature values and external environment temperature values of positions of the first air conditioner external unit and the second air conditioner external unit in real time, the air conditioning system compares the refrigerant temperature values of the two air conditioner external units with the temperature difference values of the external environment temperature values of the positions of the two air conditioner external units, and the air conditioner external unit with the larger temperature difference value is selected to work.
6. The control method of an air conditioning system as set forth in claim 5, further comprising:
and acquiring spatial temperature gradient distribution data in the area where the air conditioning system is located from a big data service center arranged at the cloud end, and respectively acquiring the environmental temperature values of the heights of the two air conditioner external units according to the spatial temperature gradient distribution data and the height information of the two air conditioner external units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910402426.2A CN110131802B (en) | 2019-05-14 | 2019-05-14 | Air conditioning system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910402426.2A CN110131802B (en) | 2019-05-14 | 2019-05-14 | Air conditioning system and control method thereof |
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| Publication Number | Publication Date |
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| CN110131802A CN110131802A (en) | 2019-08-16 |
| CN110131802B true CN110131802B (en) | 2020-03-27 |
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| CN201910402426.2A Active CN110131802B (en) | 2019-05-14 | 2019-05-14 | Air conditioning system and control method thereof |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0792249B2 (en) * | 1988-04-28 | 1995-10-09 | 三機工業株式会社 | Air conditioning equipment |
| JP2001108275A (en) * | 1999-10-08 | 2001-04-20 | Mitsubishi Electric Corp | Control system for air conditioner employing refrigerant natural circulation together |
| JP2007107859A (en) * | 2005-10-17 | 2007-04-26 | Mitsubishi Heavy Ind Ltd | Gas heat pump type air conditioner |
| JP5972018B2 (en) * | 2012-04-12 | 2016-08-17 | 三菱電機株式会社 | Air conditioner |
| CN204593592U (en) * | 2014-03-03 | 2015-08-26 | 三菱电机株式会社 | Aircondition |
| CN105526701A (en) * | 2014-09-28 | 2016-04-27 | 上海莲谷机电科技有限公司 | Lift type air conditioner frame |
| CN106152375B (en) * | 2015-03-27 | 2019-04-12 | 青岛海尔空调电子有限公司 | High drop multi-online air-conditioning system and its control method |
| CN206683101U (en) * | 2017-02-22 | 2017-11-28 | 深圳沃海森科技有限公司 | The outdoor machine of air-conditioner mounting bracket of condensed water can be handled |
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2019
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