CN112197406A - Operation control method and device of air conditioning system - Google Patents
Operation control method and device of air conditioning system Download PDFInfo
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- CN112197406A CN112197406A CN201910611342.XA CN201910611342A CN112197406A CN 112197406 A CN112197406 A CN 112197406A CN 201910611342 A CN201910611342 A CN 201910611342A CN 112197406 A CN112197406 A CN 112197406A
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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
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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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
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Fluid Mechanics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an operation control method and device of an air conditioning system, which aim to reduce noise pollution of the air conditioning system on the premise of not influencing the normal operation of the air conditioning system. The operation control method of the air conditioning system comprises the following steps: acquiring the current outdoor temperature; when the current outdoor temperature meets at least one of the first condition or the second condition, determining a first fan rotating speed corresponding to the set target condensing pressure according to the corresponding relation between the condensing pressure in the noise reduction mode and the rotating speed of the outdoor fan, and controlling the outdoor fan to operate at the first fan rotating speed to enable the air-conditioning system to operate in the noise reduction mode; the first condition is that the temperature difference between the current outdoor temperature and the highest outdoor temperature in the first set time period is smaller than a set temperature difference threshold value, and the second condition is that the current outdoor temperature is smaller than the set temperature threshold value.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to an operation control method and device of an air conditioning system.
Background
At present, a plurality of medium and small machine rooms are built near residential areas, because sensible heat load of the machine rooms is large, machine room air conditioners need to operate 24 hours all the year round, and for air cooling machine room air conditioners, certain noise pollution is generated when outdoor fans operate continuously, and living environments of residents near the machine rooms are affected. In the prior art, aiming at the noise pollution of the air conditioner in the machine room, a common treatment method is to perform sound insulation treatment by building a maintenance structure, installing sound insulation equipment and the like, but the treatment method can affect the airflow organization around the condenser and threaten the safe operation of the air conditioner in the machine room.
Disclosure of Invention
The embodiment of the invention aims to provide an operation control method and device of an air conditioning system, so as to reduce noise pollution of the air conditioning system on the premise of not influencing the normal operation of the air conditioning system.
The operation control method of the air conditioning system provided by the embodiment of the invention comprises a circulation loop formed by sequentially connecting a compressor, a condenser, a throttling element and an evaporator and an outdoor fan arranged at the condenser, and comprises the following steps:
acquiring the current outdoor temperature;
when the current outdoor temperature meets at least one of a first condition or a second condition, determining a first fan rotating speed corresponding to a set target condensing pressure according to a corresponding relation between the condensing pressure in a noise reduction mode and the rotating speed of the outdoor fan, and controlling the outdoor fan to operate at the first fan rotating speed to enable the air-conditioning system to operate in the noise reduction mode;
the first condition is that the temperature difference between the current outdoor temperature and the highest outdoor temperature in a first set time period is smaller than a set temperature difference threshold value, and the second condition is that the current outdoor temperature is smaller than the set temperature threshold value.
In a specific embodiment, after said obtaining the current outdoor temperature, the method further comprises:
and when the current outdoor temperature does not meet the first condition and the second condition at the same time, determining a second fan rotating speed corresponding to a set target condensing pressure according to the corresponding relation between the condensing pressure in the refrigerating mode and the rotating speed of the outdoor fan, and controlling the outdoor fan to operate at the second fan rotating speed to enable the air-conditioning system to operate in the refrigerating mode.
In a specific embodiment, before said obtaining the current outdoor temperature, said method further comprises:
judging whether the current time is within a second set time period;
if so, executing the step of determining a second fan rotating speed corresponding to the set target condensing pressure according to the corresponding relation between the condensing pressure in the refrigerating mode and the rotating speed of the outdoor fan, and controlling the outdoor fan to operate at the second fan rotating speed to enable the air-conditioning system to operate in the refrigerating mode;
if not, continuing to execute the step of obtaining the current outdoor temperature.
In a specific embodiment, before said obtaining the current outdoor temperature, said method further comprises:
acquiring the current return air temperature;
and determining the current refrigeration demand according to the current return air temperature.
In a specific embodiment, when the current outdoor temperature satisfies at least one of the first condition or the second condition, before determining the first fan rotation speed corresponding to the target condensation pressure according to the correspondence between the condensation pressure and the rotation speed of the outdoor fan in the noise reduction mode, the method further includes:
detecting whether the compressor is a variable capacity compressor;
if so, acquiring the number of the circulation loops, comparing the current refrigeration demand with a set refrigeration demand threshold value when the number of the circulation loops is at least one, respectively controlling the refrigeration output quantity of a compressor of each circulation loop according to a comparison result, and then executing the step of determining a first fan rotating speed corresponding to a set target condensation pressure according to the corresponding relation between the condensation pressure in the noise reduction mode and the rotating speed of the outdoor fan;
and if not, continuing to execute the step of determining the first fan rotating speed corresponding to the set target condensing pressure according to the corresponding relation between the condensing pressure in the noise reduction mode and the rotating speed of the outdoor fan.
In a specific embodiment, the separately controlling the refrigerating output of the compressor of each circulation loop according to the comparison result includes:
when the current refrigeration demand is smaller than the refrigeration demand threshold value, controlling one of the circulation loops to operate, and adjusting the refrigeration output quantity of a compressor of the circulation loop according to the current refrigeration demand;
and when the current refrigeration demand is not less than the refrigeration demand threshold value, controlling all the circulation loops to operate, determining sub-demands which are averagely distributed to all the circulation loops according to the current refrigeration demand, and adjusting the refrigeration output quantity of the compressor of each circulation loop according to the sub-demands.
In the scheme of the embodiment of the invention, the first condition and the second condition which enable the air conditioning system to operate in the noise reduction mode are preset, then when the current outdoor temperature is judged to meet the set first condition or the set second condition or meet the first condition and the second condition at the same time, the first fan rotating speed corresponding to the set target condensing pressure is determined according to the corresponding relation between the condensing pressure in the noise reduction mode and the rotating speed of the outdoor fan, and the outdoor fan is controlled to operate at the first fan rotating speed, so that the air conditioning system operates in the noise reduction mode, and the noise pollution of the air conditioning system can be reduced to a certain extent on the premise of ensuring the normal operation of the air conditioning system and meeting the refrigeration requirement of a machine room.
Based on the same inventive concept, an embodiment of the present invention further provides an operation control device of an air conditioning system, the air conditioning system including a circulation loop formed by sequentially connecting a compressor, a condenser, a throttling element, and an evaporator, and an outdoor fan disposed at the condenser, the device including:
a first obtaining unit for obtaining a current outdoor temperature;
the control unit is used for determining a first fan rotating speed corresponding to a set target condensing pressure according to the corresponding relation between the condensing pressure in the noise reduction mode and the rotating speed of the outdoor fan when the current outdoor temperature meets at least one of a first condition or a second condition, and controlling the outdoor fan to operate at the first fan rotating speed to enable the air-conditioning system to operate in the noise reduction mode;
the first condition is that the temperature difference between the current outdoor temperature and the highest outdoor temperature in a first set time period is smaller than a set temperature difference threshold value, and the second condition is that the current outdoor temperature is smaller than the set temperature threshold value.
In a particular embodiment, the control unit is further configured to:
and when the current outdoor temperature does not meet the first condition and the second condition at the same time, determining a second fan rotating speed corresponding to a set target condensing pressure according to the corresponding relation between the condensing pressure in the refrigerating mode and the rotating speed of the outdoor fan, and controlling the outdoor fan to operate at the second fan rotating speed to enable the air-conditioning system to operate in the refrigerating mode.
In a particular embodiment, the control unit is further configured to:
judging whether the current time is within a second set time period;
if so, executing the step of determining a second fan rotating speed corresponding to the set target condensing pressure according to the corresponding relation between the condensing pressure in the refrigerating mode and the rotating speed of the outdoor fan, and controlling the outdoor fan to operate at the second fan rotating speed to enable the air-conditioning system to operate in the refrigerating mode;
if not, continuing to execute the step of obtaining the current outdoor temperature.
In a specific embodiment, further comprising:
the second acquisition unit is used for acquiring the current return air temperature;
the control unit is further configured to: and determining the current refrigeration demand according to the current return air temperature.
In a specific embodiment, when the current outdoor temperature satisfies at least one of the first condition or the second condition, before determining the first fan rotation speed corresponding to the target condensation pressure according to the correspondence between the condensation pressure and the rotation speed of the outdoor fan in the noise reduction mode, the control unit is further configured to:
detecting whether the compressor is a variable capacity compressor;
if so, acquiring the number of the circulation loops, comparing the current refrigeration demand with a set refrigeration demand threshold value when the number of the circulation loops is at least one, respectively controlling the refrigeration output quantity of a compressor of each circulation loop according to a comparison result, and then executing the step of determining a first fan rotating speed corresponding to a set target condensation pressure according to the corresponding relation between the condensation pressure in the noise reduction mode and the rotating speed of the outdoor fan;
and if not, continuing to execute the step of determining the first fan rotating speed corresponding to the set target condensing pressure according to the corresponding relation between the condensing pressure in the noise reduction mode and the rotating speed of the outdoor fan.
In a specific embodiment, the control unit is specifically configured to:
when the current refrigeration demand is smaller than the refrigeration demand threshold value, controlling one of the circulation loops to operate, and adjusting the refrigeration output quantity of a compressor of the circulation loop according to the current refrigeration demand;
and when the current refrigeration demand is not less than the refrigeration demand threshold value, controlling all the circulation loops to operate, determining sub-demands which are averagely distributed to all the circulation loops according to the current refrigeration demand, and adjusting the refrigeration output quantity of the compressor of each circulation loop according to the sub-demands.
Similarly, the noise pollution of the air conditioning system can be reduced to a certain extent on the premise of ensuring the normal operation of the air conditioning system and meeting the refrigeration requirement of the machine room in the scheme of the embodiment of the invention.
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 flow chart illustrating an operation control method of an air conditioning system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an operation control device of an air conditioning system according to an embodiment of the present invention.
Reference numerals:
10-compressor 20-condenser 30-throttling element 40-evaporator 50-outdoor fan
100-first acquisition unit 200-second acquisition unit 300-control unit
Detailed Description
In order to reduce noise pollution of an air conditioning system on the premise of not influencing the normal operation of the air conditioning system, the embodiment of the invention provides an operation control method and device of the air conditioning system. In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by referring to the following examples.
As shown in fig. 1 and 2, an operation control method of an air conditioning system according to an embodiment of the present invention includes a circulation loop formed by sequentially connecting a compressor 10, a condenser 20, a throttling element 30, and an evaporator 40, and an outdoor fan 50 disposed at the condenser 20, and includes:
the first condition is that the temperature difference between the current outdoor temperature and the highest outdoor temperature in the first set time period is smaller than a set temperature difference threshold value, and the second condition is that the current outdoor temperature is smaller than the set temperature threshold value.
In the embodiment of the present invention, the first set time period may be specifically the day before the current date, and the temperature difference threshold and the temperature threshold may be specifically set according to environments of different regions, which is not limited in this application, and it can be understood that the temperature difference threshold in the embodiment of the present application is actually a negative value; the target condensing pressure can be set according to experimental tests or experience, and the application also does not limit the target condensing pressure; the specific type of the compressor 10 is not limited, and may be a constant capacity or variable capacity compressor; the condenser 20 may be specifically an air-cooled condenser; the specific type of the throttling element 30 is not limited, and may be an electronic expansion valve or a thermal expansion valve; the evaporator 40 is not limited in specific type, and may be, for example, a finned tube evaporator or a parallel flow microchannel evaporator, or a plate evaporator, a shell-and-tube heat exchanger, etc.; the specific type of the outdoor fan 50 is not limited, and may be, for example, an EC axial flow fan or an EC centrifugal fan. Alternative types of refrigerant in the circulation circuit formed by the compressor 10, the condenser 20, the throttling element 30 and the evaporator 40 include R22, R410A, R407C, R744, R134a, R1234yf, R290 and R600a, etc.
When the current outdoor temperature meets the first condition and/or the second condition, the current outdoor temperature is relatively low, so that the characteristic that the heat exchange capacity of the condenser is increased after the outdoor temperature is reduced can be utilized, the rotating speed of the outdoor fan is adjusted according to the corresponding relation between the condensing pressure and the rotating speed of the outdoor fan in the noise reduction mode, the rotating speed of the outdoor fan is reduced to the first fan rotating speed corresponding to the target condensing pressure, and the purpose of reducing the running noise of the outdoor fan is achieved on the premise of ensuring the normal running of the air conditioning system. The correspondence between the condensing pressure and the rotating speed of the outdoor fan in the noise reduction mode may be a pre-stored functional operation relationship or a mapping relationship based on a database, which is not limited in the present application.
In the scheme of the embodiment of the invention, the first condition and the second condition which enable the air conditioning system to operate in the noise reduction mode are preset, then when the current outdoor temperature is judged to meet the set first condition or the set second condition or meet the first condition and the second condition at the same time, the first fan rotating speed corresponding to the set target condensing pressure is determined according to the corresponding relation between the condensing pressure in the noise reduction mode and the rotating speed of the outdoor fan, and the outdoor fan is controlled to operate at the first fan rotating speed, so that the air conditioning system operates in the noise reduction mode, and the noise pollution of the air conditioning system can be reduced to a certain extent on the premise of ensuring the normal operation of the air conditioning system and meeting the refrigeration requirement of a machine room.
Referring to fig. 2, in a preferred embodiment of the present invention, after acquiring the current outdoor temperature, the operation control method of the air conditioning system further includes:
and 103, when the current outdoor temperature does not meet the first condition and the second condition at the same time, determining a second fan rotating speed corresponding to the set target condensing pressure according to the corresponding relation between the condensing pressure in the refrigerating mode and the rotating speed of the outdoor fan, and controlling the outdoor fan to operate at the second fan rotating speed to enable the air-conditioning system to operate in the refrigerating mode.
The correspondence between the condensing pressure and the rotating speed of the outdoor fan in the refrigeration mode may be a pre-stored functional operation relationship or a mapping relationship based on a database, which is not limited in the present application. In this embodiment, when the current outdoor temperature does not satisfy the first condition and the second condition at the same time, it is indicated that the current outdoor temperature is relatively high, and if the rotation speed of the outdoor fan is adjusted according to the correspondence between the condensation pressure and the rotation speed of the outdoor fan in the noise reduction mode, the heat exchange capacity of the condenser is reduced, and it is difficult to satisfy the refrigeration requirement of the machine room. It will be appreciated that the second fan speed is higher than the first fan speed.
In an embodiment of the present invention, before obtaining the current outdoor temperature, the operation control method of the air conditioning system further includes:
judging whether the current time is within a second set time period;
if so, determining the rotating speed of a second fan corresponding to the set target condensing pressure according to the corresponding relation between the condensing pressure and the rotating speed of the outdoor fan in the refrigerating mode, and controlling the outdoor fan to operate at the rotating speed of the second fan to enable the air-conditioning system to operate in the refrigerating mode;
if not, the step of obtaining the current outdoor temperature is continuously executed.
In this embodiment, the second set time period may be specifically determined according to actual conditions of different regions, and may be, for example, 8: 00-18: 00, the refrigeration requirement of the machine room is mainly met in the time period, so that the air conditioning system can be directly controlled to operate in a refrigeration mode; and at current date 8: 00-18: in the time period other than 00, in order to reduce the influence of noise pollution on the neighboring residents, it is necessary to control the operation mode of the air conditioning system according to the scheme of the foregoing embodiment to reduce the noise pollution as much as possible on the premise that the normal operation of the air conditioning system can be ensured.
In an embodiment of the present invention, before obtaining the current outdoor temperature, the operation control method of the air conditioning system further includes:
acquiring the current return air temperature;
and determining the current refrigeration demand according to the current return air temperature.
Specifically, a target temperature may be set, a temperature difference between the current return air temperature and the target temperature may be calculated, and then a quotient of the temperature difference and the set temperature accuracy may be calculated to the current refrigeration demand. It should be noted that the calculation of the refrigeration demand is obtained by proportional control, and besides, the calculation may be adjusted by PI control or PID control, which is not limited in the embodiment of the present application.
In a preferred embodiment of the present invention, when the current outdoor temperature satisfies at least one of the first condition or the second condition, before determining the first fan rotation speed corresponding to the target condensation pressure according to the correspondence between the condensation pressure and the rotation speed of the outdoor fan in the noise reduction mode, the operation control method of the air conditioning system further includes:
detecting whether the compressor is a variable capacity compressor;
if yes, acquiring the number of the circulation loops, comparing the current refrigeration demand with a set refrigeration demand threshold value when the number of the circulation loops is at least one, respectively controlling the refrigeration output quantity of a compressor of each circulation loop according to a comparison result, and then determining the rotating speed of a first fan corresponding to the set target condensation pressure according to the corresponding relation between the condensation pressure in the noise reduction mode and the rotating speed of an outdoor fan;
if not, continuing to execute the step of determining the first fan rotating speed corresponding to the set target condensing pressure according to the corresponding relation between the condensing pressure in the noise reduction mode and the rotating speed of the outdoor fan.
By adopting the scheme of the embodiment, when the compressor is detected to be the constant-capacity compressor, the control logic of the outdoor unit can be directly entered, and the rotating speed of the outdoor fan is adjusted according to the corresponding relation between the condensing pressure and the rotating speed of the outdoor fan in the noise reduction mode; when the compressor is detected to be the variable-capacity compressor, the refrigerating output quantity of the compressor in each circulation loop can be respectively controlled according to the comparison result of the current refrigerating demand and the set refrigerating demand threshold value. Specifically, when the current refrigeration demand is smaller than a refrigeration demand threshold value, one of the circulation loops is controlled to operate, and the refrigeration output quantity of a compressor of the circulation loop is adjusted according to the current refrigeration demand; when the current refrigeration demand is not less than the refrigeration demand threshold value, the operation of all the circulation loops is controlled, the sub-demands which are evenly distributed to all the circulation loops are determined according to the current refrigeration demand, and the refrigeration output quantity of the compressor of each circulation loop is adjusted according to the sub-demands.
In addition, it should be noted that, when a plurality of air conditioning systems are arranged in the machine room, the refrigeration demand distribution can be carried out according to the networking so as to control the refrigeration capacity of each air conditioner, and further, each outdoor fan can operate at a relatively low rotating speed, thereby achieving the purpose of reducing noise pollution.
As shown in fig. 1 and 3, based on the same inventive concept, an embodiment of the present invention further provides an operation control device of an air conditioning system, the air conditioning system including a circulation loop formed by sequentially connecting a compressor 10, a condenser 20, a throttling element 30, and an evaporator 40, and an outdoor fan 50 disposed at the condenser, the operation control device of the air conditioning system including:
a first obtaining unit 100 for obtaining a current outdoor temperature;
the control unit 300 is configured to, when the current outdoor temperature meets at least one of the first condition or the second condition, determine a first fan rotation speed corresponding to a set target condensation pressure according to a correspondence between a condensation pressure in the noise reduction mode and a rotation speed of the outdoor fan, and control the outdoor fan to operate at the first fan rotation speed, so that the air conditioning system operates in the noise reduction mode;
the first condition is that the temperature difference between the current outdoor temperature and the highest outdoor temperature in the first set time period is smaller than a set temperature difference threshold value, and the second condition is that the current outdoor temperature is smaller than the set temperature threshold value.
In a particular embodiment, the control unit 300 is further configured to:
and when the current outdoor temperature does not meet the first condition and the second condition at the same time, determining the rotating speed of a second fan corresponding to the set target condensing pressure according to the corresponding relation between the condensing pressure in the refrigerating mode and the rotating speed of the outdoor fan, and controlling the outdoor fan to operate at the rotating speed of the second fan so as to enable the air-conditioning system to operate in the refrigerating mode.
In a particular embodiment, the control unit 300 is further configured to:
judging whether the current time is within a second set time period;
if so, determining the rotating speed of a second fan corresponding to the set target condensing pressure according to the corresponding relation between the condensing pressure and the rotating speed of the outdoor fan in the refrigerating mode, and controlling the outdoor fan to operate at the rotating speed of the second fan to enable the air-conditioning system to operate in the refrigerating mode;
if not, the step of obtaining the current outdoor temperature is continuously executed.
In a specific embodiment, the operation control device of an air conditioning system further includes:
a second obtaining unit 200, configured to obtain a current return air temperature;
the control unit 300 is further configured to: and determining the current refrigeration demand according to the current return air temperature.
In a specific embodiment, when the current outdoor temperature satisfies at least one of the first condition or the second condition, before determining the first fan rotation speed corresponding to the target condensing pressure according to the correspondence between the condensing pressure and the rotation speed of the outdoor fan in the noise reduction mode, the control unit 300 is further configured to:
detecting whether the compressor is a variable capacity compressor;
if yes, acquiring the number of the circulation loops, comparing the current refrigeration demand with a set refrigeration demand threshold value when the number of the circulation loops is at least one, respectively controlling the refrigeration output quantity of a compressor of each circulation loop according to a comparison result, and then determining the rotating speed of a first fan corresponding to the set target condensation pressure according to the corresponding relation between the condensation pressure in the noise reduction mode and the rotating speed of an outdoor fan;
if not, continuing to execute the step of determining the first fan rotating speed corresponding to the set target condensing pressure according to the corresponding relation between the condensing pressure in the noise reduction mode and the rotating speed of the outdoor fan.
In a specific embodiment, the control unit 300 is specifically configured to:
when the current refrigeration demand is smaller than a refrigeration demand threshold value, controlling one of the circulation loops to operate, and adjusting the refrigeration output quantity of a compressor of the circulation loop according to the current refrigeration demand;
and when the current refrigeration demand is not less than the refrigeration demand threshold value, controlling all the circulation loops to operate, determining the sub-demands which are averagely distributed to all the circulation loops according to the current refrigeration demand, and adjusting the refrigeration output quantity of the compressor of each circulation loop according to the sub-demands.
Similarly, the noise pollution of the air conditioning system can be reduced to a certain extent on the premise of ensuring the normal operation of the air conditioning system and meeting the refrigeration requirement of the machine room in the scheme of the embodiment of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (12)
1. An operation control method of an air conditioning system including a circulation circuit formed by sequentially connecting a compressor, a condenser, a throttling element, and an evaporator, and an outdoor fan provided at the condenser, the method comprising:
acquiring the current outdoor temperature;
when the current outdoor temperature meets at least one of a first condition or a second condition, determining a first fan rotating speed corresponding to a set target condensing pressure according to a corresponding relation between the condensing pressure in a noise reduction mode and the rotating speed of the outdoor fan, and controlling the outdoor fan to operate at the first fan rotating speed to enable the air-conditioning system to operate in the noise reduction mode;
the first condition is that the temperature difference between the current outdoor temperature and the highest outdoor temperature in a first set time period is smaller than a set temperature difference threshold value, and the second condition is that the current outdoor temperature is smaller than the set temperature threshold value.
2. The operation control method according to claim 1, wherein after said obtaining the current outdoor temperature, the method further comprises:
and when the current outdoor temperature does not meet the first condition and the second condition at the same time, determining a second fan rotating speed corresponding to a set target condensing pressure according to the corresponding relation between the condensing pressure in the refrigerating mode and the rotating speed of the outdoor fan, and controlling the outdoor fan to operate at the second fan rotating speed to enable the air-conditioning system to operate in the refrigerating mode.
3. The operation control method according to claim 2, wherein before the obtaining of the current outdoor temperature, the method further comprises:
judging whether the current time is within a second set time period;
if so, executing the step of determining a second fan rotating speed corresponding to the set target condensing pressure according to the corresponding relation between the condensing pressure in the refrigerating mode and the rotating speed of the outdoor fan, and controlling the outdoor fan to operate at the second fan rotating speed to enable the air-conditioning system to operate in the refrigerating mode;
if not, continuing to execute the step of obtaining the current outdoor temperature.
4. The operation control method according to any one of claims 1 to 3, wherein before the obtaining of the current outdoor temperature, the method further comprises:
acquiring the current return air temperature;
and determining the current refrigeration demand according to the current return air temperature.
5. The operation control method according to claim 4, wherein when the current outdoor temperature satisfies at least one of a first condition or a second condition, before determining a first fan rotation speed corresponding to a target condensation pressure according to the correspondence relationship of the condensation pressure and the rotation speed of the outdoor fan in the noise reduction mode, the method further comprises:
detecting whether the compressor is a variable capacity compressor;
if so, acquiring the number of the circulation loops, comparing the current refrigeration demand with a set refrigeration demand threshold value when the number of the circulation loops is at least one, respectively controlling the refrigeration output quantity of a compressor of each circulation loop according to a comparison result, and then executing the step of determining a first fan rotating speed corresponding to a set target condensation pressure according to the corresponding relation between the condensation pressure in the noise reduction mode and the rotating speed of the outdoor fan;
and if not, continuing to execute the step of determining the first fan rotating speed corresponding to the set target condensing pressure according to the corresponding relation between the condensing pressure in the noise reduction mode and the rotating speed of the outdoor fan.
6. The operation control method as set forth in claim 5, wherein said individually controlling the refrigerating output of the compressor of each of the circulation circuits according to the comparison result comprises:
when the current refrigeration demand is smaller than the refrigeration demand threshold value, controlling one of the circulation loops to operate, and adjusting the refrigeration output quantity of a compressor of the circulation loop according to the current refrigeration demand;
and when the current refrigeration demand is not less than the refrigeration demand threshold value, controlling all the circulation loops to operate, determining sub-demands which are averagely distributed to all the circulation loops according to the current refrigeration demand, and adjusting the refrigeration output quantity of the compressor of each circulation loop according to the sub-demands.
7. An operation control device of an air conditioning system including a circulation circuit formed by sequentially connecting a compressor, a condenser, a throttling element and an evaporator, and an outdoor fan provided at the condenser, the device comprising:
a first obtaining unit for obtaining a current outdoor temperature;
the control unit is used for determining a first fan rotating speed corresponding to a set target condensing pressure according to the corresponding relation between the condensing pressure in the noise reduction mode and the rotating speed of the outdoor fan when the current outdoor temperature meets at least one of a first condition or a second condition, and controlling the outdoor fan to operate at the first fan rotating speed to enable the air-conditioning system to operate in the noise reduction mode;
the first condition is that the temperature difference between the current outdoor temperature and the highest outdoor temperature in a first set time period is smaller than a set temperature difference threshold value, and the second condition is that the current outdoor temperature is smaller than the set temperature threshold value.
8. The operation control device according to claim 7, wherein the control unit is further configured to:
and when the current outdoor temperature does not meet the first condition and the second condition at the same time, determining a second fan rotating speed corresponding to a set target condensing pressure according to the corresponding relation between the condensing pressure in the refrigerating mode and the rotating speed of the outdoor fan, and controlling the outdoor fan to operate at the second fan rotating speed to enable the air-conditioning system to operate in the refrigerating mode.
9. The operation control device according to claim 8, wherein the control unit is further configured to:
judging whether the current time is within a second set time period;
if so, executing the step of determining a second fan rotating speed corresponding to the set target condensing pressure according to the corresponding relation between the condensing pressure in the refrigerating mode and the rotating speed of the outdoor fan, and controlling the outdoor fan to operate at the second fan rotating speed to enable the air-conditioning system to operate in the refrigerating mode;
if not, continuing to execute the step of obtaining the current outdoor temperature.
10. The operation control device according to any one of claims 7 to 9, further comprising:
the second acquisition unit is used for acquiring the current return air temperature;
the control unit is further configured to: and determining the current refrigeration demand according to the current return air temperature.
11. The operation control device according to claim 10, wherein when the current outdoor temperature satisfies at least one of a first condition or a second condition, before determining a first fan rotation speed corresponding to a target condensation pressure according to the correspondence relationship between the condensation pressure and the rotation speed of the outdoor fan in the noise reduction mode, the control unit is further configured to:
detecting whether the compressor is a variable capacity compressor;
if so, acquiring the number of the circulation loops, comparing the current refrigeration demand with a set refrigeration demand threshold value when the number of the circulation loops is at least one, respectively controlling the refrigeration output quantity of a compressor of each circulation loop according to a comparison result, and then executing the step of determining a first fan rotating speed corresponding to a set target condensation pressure according to the corresponding relation between the condensation pressure in the noise reduction mode and the rotating speed of the outdoor fan;
and if not, continuing to execute the step of determining the first fan rotating speed corresponding to the set target condensing pressure according to the corresponding relation between the condensing pressure in the noise reduction mode and the rotating speed of the outdoor fan.
12. The operation control device according to claim 11, wherein the control unit is specifically configured to:
when the current refrigeration demand is smaller than the refrigeration demand threshold value, controlling one of the circulation loops to operate, and adjusting the refrigeration output quantity of a compressor of the circulation loop according to the current refrigeration demand;
and when the current refrigeration demand is not less than the refrigeration demand threshold value, controlling all the circulation loops to operate, determining sub-demands which are averagely distributed to all the circulation loops according to the current refrigeration demand, and adjusting the refrigeration output quantity of the compressor of each circulation loop according to the sub-demands.
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| CN201910611342.XA CN112197406A (en) | 2019-07-08 | 2019-07-08 | Operation control method and device of air conditioning system |
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