CN113983661B - Computer room air conditioner control method, terminal and storage medium - Google Patents
Computer room air conditioner control method, terminal and storage medium Download PDFInfo
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- CN113983661B CN113983661B CN202111242216.5A CN202111242216A CN113983661B CN 113983661 B CN113983661 B CN 113983661B CN 202111242216 A CN202111242216 A CN 202111242216A CN 113983661 B CN113983661 B CN 113983661B
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000004378 air conditioning Methods 0.000 claims abstract description 153
- 238000005057 refrigeration Methods 0.000 claims abstract description 38
- 238000007791 dehumidification Methods 0.000 claims abstract description 22
- 238000004590 computer program Methods 0.000 claims description 20
- 238000005485 electric heating Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 9
- 230000003213 activating effect Effects 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 2
- 230000006870 function Effects 0.000 description 12
- 238000001816 cooling Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
-
- 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
-
- 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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- 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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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control method, a terminal and a storage medium of a machine room air conditioner, wherein the method comprises the following steps: acquiring operation parameters of an air conditioning unit in real time; if the fact that the actual value of the return air temperature of the air conditioning unit meets the low return air temperature condition and the compressor in the air conditioning unit is in an operating state is monitored for a first preset time period, a low-operation mark is activated; and according to the low-load operation sign, the compressor in the air conditioning unit is kept to operate in a current working state so as to keep the air conditioning unit to operate in a refrigeration mode or a dehumidification mode. Through the scheme, the compressor can be kept in the running state when the air conditioning unit is in a low-load state, the problem of high humidity of the machine room caused by frequent start and stop of the air conditioner in the low-load state is avoided, and the temperature and humidity requirements in the machine room can be still effectively guaranteed when the load of the machine room is relatively low.
Description
Technical Field
The present invention relates to the field of air conditioning technologies, and in particular, to a method, a terminal, and a storage medium for controlling an air conditioner in a machine room.
Background
The low-load dehumidification means that the air conditioner load is very low and the dehumidification requirement is accompanied, the air conditioner cold energy range in the mode can exceed the low-load range of the air conditioner, at the moment, the external environment temperature can still be reduced under the action of the air conditioner cold energy, the air conditioner system is stopped, the external environment is high in humidity, and the humidity is out of control.
At present, most newly built data centers tend to select variable-frequency air conditioners based on energy-saving consideration, but due to the fact that the refrigerating capacity range is generally high when the air conditioners are used for effectively dehumidifying, the problems that the air conditioners are frequently started and stopped and cannot be used for stably dehumidifying still exist when the air conditioners are used for low load, and the high-humidity hidden danger of a client machine room cannot be solved.
Disclosure of Invention
In view of the above, the invention provides a control method, a terminal and a storage medium for an air conditioner in a machine room, which can solve the problem of high humidity of the machine room caused by frequent start and stop of the air conditioner in low load.
In a first aspect, an embodiment of the present invention provides a method for controlling an air conditioner in a machine room, including:
acquiring operation parameters of an air conditioning unit in real time; the operation parameters comprise an actual return air temperature value and the working state of the compressor;
if the fact that the actual value of the return air temperature of the air conditioning unit meets the low return air temperature condition and the compressor in the air conditioning unit is in an operating state is monitored for a first preset time period, a low-operation mark is activated; the low return air temperature condition includes: the return air temperature difference value is smaller than the set deviation value; or the actual value of the return air temperature in the current period is smaller than the actual value of the return air temperature in the previous period; the return air temperature difference value is obtained by subtracting a return air temperature set value from a return air temperature actual value;
and according to the low-load operation sign, the compressor in the air conditioning unit is kept to operate in a current working state so as to keep the air conditioning unit to operate in a refrigeration mode or a dehumidification mode.
In a second aspect, an embodiment of the present invention provides a terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method according to any one of the possible implementations of the first aspect above when the computer program is executed.
In a third aspect, embodiments of the present invention provide a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of the method as described in any one of the possible implementations of the first aspect above.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
firstly, acquiring operation parameters of an air conditioning unit in real time; if the fact that the actual value of the return air temperature of the air conditioning unit meets the low return air temperature condition and the compressor in the air conditioning unit is in an operating state is monitored for a first preset time period, a low-operation mark is activated; and according to the low-load operation sign, the compressor in the air conditioning unit is kept to operate in a current working state so as to keep the air conditioning unit to operate in a refrigeration mode or a dehumidification mode. Through the scheme, the compressor can be kept in the running state when the air conditioning unit is in a low-load state, the problem of high humidity of the machine room caused by frequent start and stop of the air conditioner in the low-load state is avoided, and the temperature and humidity requirements in the machine room can be still effectively guaranteed when the load of the machine room is relatively low.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is an application scenario diagram of a machine room air conditioner control method provided by an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an air conditioner control device for a machine room according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a terminal according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the following description will be made by way of specific embodiments with reference to the accompanying drawings.
Referring to fig. 1, a flowchart of an implementation of a method for controlling an air conditioner in a machine room according to an embodiment of the present invention is shown, and details are as follows:
s101: acquiring operation parameters of an air conditioning unit in real time; the operating parameters include the actual return air temperature and the operating conditions of the compressor.
The execution main body (terminal) of the embodiment can be a machine room movable ring monitoring system, and can also be a controller of an air conditioning unit.
In this embodiment, fig. 2 shows a schematic structural diagram of the air conditioner provided in this embodiment, and as shown in fig. 2, the air conditioner includes an inner machine and an outer machine, where the inner machine includes a dry filter, a liquid viewing mirror, a throttling part, an evaporator, a low pressure sensor, a compressor and oil components that are sequentially connected; the reheater is installed near the evaporator, and the output end of the compressor is connected with an exhaust temperature sensing bulb. The outer machine comprises a condenser connected with oil, the outlet of the condenser is connected with a drying filter of the inner machine, and a high-pressure sensor is arranged at the outlet of the condenser.
In this embodiment, the operation parameters of the air conditioning unit include an actual return air temperature value, which is obtained by monitoring a return air temperature sensor installed in the return air inlet of the air conditioner. The air conditioning unit comprises at least one compressor, and the working states of the compressor comprise an operation state and a stop state.
S102: if the fact that the actual value of the return air temperature of the air conditioning unit meets the low return air temperature condition and the compressor in the air conditioning unit is in an operating state is monitored for a first preset time period, a low-operation mark is activated; the low return air temperature condition includes: the return air temperature difference value is smaller than the set deviation value; or the actual value of the return air temperature in the current period is smaller than the actual value of the return air temperature in the previous period; the return air temperature difference value is obtained by subtracting a return air temperature set value from a return air temperature actual value.
In this embodiment, before executing step S102, the terminal needs to first determine whether the air conditioning unit ends soft start or protection adjustment, and if the air conditioning unit ends soft start or protection adjustment, the terminal starts executing step S102 after starting a preset period of time from the end time. The preset time period may be, for example, 60s.
When the actual value of the return air temperature meets the condition of low return air temperature, the current environment temperature is lower, and if a compressor is in an operating state in the air conditioning unit, the air conditioning unit is in a refrigerating mode or a dehumidifying mode, the current air conditioning unit still outputs cold to the environment, when the actually required cold output of the air conditioning unit is lower than the lowest cold output of the air conditioning unit, the air conditioner is stopped under low load, because the machine room in the data center is usually a closed and narrow space like a cabinet, when the air conditioner is stopped under low load, the compressor is stopped first, but at the moment, the inner fan is still started, the condensate water which is not carried out on the evaporator is blown back into the machine room again, the narrow space of the machine room can lead to the rising of indoor humidity due to the frequent starting of the compressor, and in order to avoid the problem of high humidity of the machine room caused by the low load stop of the air conditioner, the low load operation mark needs to be activated.
Specifically, the setting range of the deviation value is set to 0-20 ℃. Preferably, the set offset value may be 2 ℃.
S103: and according to the low-load operation sign, the compressor in the air conditioning unit is kept to operate in a current working state so as to keep the air conditioning unit to operate in a refrigeration mode or a dehumidification mode.
In the present embodiment, the cooling mode is a mode including a cooling function, and the dehumidifying mode is a mode including a dehumidifying function. The air conditioning unit can realize the main refrigeration and auxiliary dehumidification functions in the refrigeration mode, and can realize the main dehumidification function in the dehumidification mode, and the refrigeration mode and the dehumidification mode both require the compressor in the air conditioning unit to be in an operation state, so that the dehumidification function can be realized as long as the compressor is in the operation state, and the high humidity problem of a machine room is avoided; the terminal in this embodiment controls the compressor in the air conditioning unit to be maintained in the current operating state, i.e., the compressor maintained in the operating state is not stopped, when the low-running flag is activated.
As can be seen from the above embodiments, in the embodiments of the present invention, operation parameters of the air conditioning unit are first obtained in real time; if the fact that the actual value of the return air temperature of the air conditioning unit meets the low return air temperature condition and the compressor in the air conditioning unit is in an operating state is monitored for a first preset time period, a low-operation mark is activated; and finally, keeping the compressor in the air conditioning unit to operate in the current working state according to the low-load operation sign. Through the scheme, the compressor can be guaranteed to be kept in a non-stop state when the air conditioning unit is in a low-load state, and the problem of high humidity of a machine room caused by frequent starting and stopping of the air conditioner in the low-load state is avoided.
In one embodiment, the operating parameters further include an operating mode of the air conditioning unit;
the specific implementation flow of S103 includes:
controlling the opening of a set load corresponding to the machine room according to the low-running mark;
and/or, when the low-running flag is in an activated state, not executing a compressor shutdown instruction of the air conditioning unit;
and/or controlling the working mode of the air conditioning unit to be switched to a dehumidifying mode according to the low-running mark.
In one embodiment, the set load includes a reheater and/or a separate heating device located near an evaporator of an air conditioning unit.
In this embodiment, the set load includes at least one of a reheater and an independent heating device. The reheater is a heating device of the air conditioning unit, and can realize the dehumidification heating function. The independent heating device can be a heating device which is arranged in the machine room independently. The separate heating device may also be mounted near the evaporator. The set load is started to increase the heat in the machine room, so that the air conditioner is prevented from being stopped due to low load, and the compressor is kept in the current working state.
In one embodiment, the operating parameters further include an operating mode of the air conditioning unit, and the set load includes at least one;
the controlling the opening of the set load of the machine room according to the low-load running flag includes:
when the air conditioning unit works in a refrigerating mode, if the number of compressors in an operating state in the air conditioning unit is larger than a first preset number; and starting all the set loads corresponding to the machine room.
In this embodiment, after the low-load operation flag is activated, if the exit condition of the low-load operation flag is not satisfied, the air conditioning unit always maintains the active operating state of the low-load operation flag. If the air conditioning unit works in the refrigeration mode and the number of compressors in the current running state is larger than the first preset number, the refrigeration capacity of the current air conditioning unit is still larger, so that the set load in the air conditioning unit is controlled to be started, and the actual load of the air conditioner can be larger than or equal to the minimum output load of the air conditioner.
When the number of compressors currently in the running state is equal to the first preset number, all the set loads can be started, or only the set loads corresponding to the first preset number can be started.
In addition, if the air conditioning unit works in the refrigeration mode and the number of compressors in the running state is smaller than the first preset number, only one set load is started, or the starting number of the set load is the same as the number of the compressors in the running state.
Illustratively, the first predetermined number may be 1.
In one embodiment, the operating parameters further include an operating mode of the air conditioning unit, a cooling demand, and an actual frequency of a compressor; the operation modes of the air conditioning unit include a cooling mode and a dehumidifying mode. The specific implementation flow of S102 includes:
when the air conditioning unit works in a refrigeration mode, if the refrigeration requirement of the air conditioning unit is monitored to be smaller than the first preset threshold value for the first preset duration, the actual value of the return air temperature meets the low return air temperature condition, and the actual frequencies of all compressors in the running state in the air conditioning unit are smaller than the frequency lower limit value; starting the low-load running mark;
and when the air conditioning unit works in a dehumidification mode, if the refrigerating requirement of the air conditioning unit is monitored to be smaller than the first preset threshold value and the actual value of the return air temperature meets the low return air temperature condition for a duration of the first preset time period, starting the low-load operation sign.
Specifically, the process of calculating the refrigeration demand includes:
acquiring the current environment temperature of a machine room and the set temperature of an air conditioning unit;
based on the formulaObtaining refrigeration requirement, wherein T 1 Indicating the current ambient temperature, T s The set temperature is indicated, and Δt represents the preset sensitivity.
For example, if the current ambient temperature is 25 degrees, the set temperature is 24 degrees, the preset sensitivity is 3 degrees, and the refrigeration requirement is 33%.
Specifically, the first preset threshold is a value smaller than zero, which may be-50%. The lower frequency limit value is a sum of a lowest frequency of the inverter compressor and a first frequency margin, and the first frequency margin may be 5Hz and the first preset time period may be 30s, for example.
As a specific example, specific conditions for activating the low-load run flag may include:
when the air conditioning unit works in a refrigeration mode, if the refrigeration requirement of the air conditioning unit is less than or equal to-50% after 30 seconds, the actual value of the return air temperature in the current period is smaller than the actual value of the return air temperature in the previous period, and the actual frequencies of all compressors in the running state in the air conditioning unit are smaller than the lower frequency limit value; starting the low-load running mark;
when the air conditioning unit works in the dehumidification mode, if the refrigeration requirement of the air conditioning unit is not more than 50% after 30 seconds, and the actual value of the return air temperature in the current period is smaller than the actual value of the return air temperature in the previous period, the low-load operation sign is started.
In one embodiment, the operating parameters further include return air relative humidity;
another implementation procedure of S102 may further include:
and if the compressor in the air conditioning unit is in an operating state, the actual value of the return air temperature of the air conditioning unit meets the low return air temperature condition and the relative humidity of the return air is larger than the high-humidity electric heating starting value after the first preset time period is continuously monitored, starting the low-load operation sign.
In this embodiment, the return air relative humidity is monitored by a humidity sensor disposed at the return air inlet of the air conditioner. The setting range of the high-humidity electric heating start value can be 20% -80%, and preferably, the high-humidity electric heating start value is 45%. The judgment of the relative humidity of the return air is to avoid the machine room from entering a low-humidity state when the air conditioner is dehumidified under low load, so that a high-humidity electric heating starting value is added as a high-humidity threshold value.
Specifically, if the compressor is in the refrigeration mode and the return air temperature difference is smaller than the set deviation value and the return air relative humidity is larger than the high-humidity electric heating starting value after 30 seconds, the current machine room is in the low-load high-humidity state, and therefore the low-running mark is activated.
In one embodiment, after S102, the method provided in this embodiment further includes:
and controlling rated rotation speeds of all compressors in the air conditioning unit according to the low-running mark to be adjusted to be the oil return rotation speed of the compressors.
In one embodiment, the operating parameters further include an operating mode of the air conditioning unit, a cooling demand, and an actual frequency of a compressor;
after S102, the method provided in this embodiment further includes:
when the air conditioning unit works in a refrigeration mode, if the refrigeration requirement of the air conditioning unit is monitored to be smaller than a second preset threshold value for a second preset duration, the actual value of the return air temperature meets the condition of high return air temperature, and the actual frequency of the compressor in an operating state in the air conditioning unit is larger than the upper frequency limit value; clearing the low-load running flag;
when the air conditioning unit works in a dehumidification mode, if the refrigerating requirement of the air conditioning unit is monitored to be larger than a third preset threshold value and the actual value of the return air temperature meets the high return air temperature condition for the second preset duration, the low-load operation mark is cleared;
the high return air temperature condition comprises that the actual return air temperature value of the current period is larger than that of the previous period.
In this embodiment, the second preset threshold may be 0%, and the third preset threshold may be a value greater than zero, specifically may be 50%. The second preset time period may be 120s. The upper frequency limit value is obtained by subtracting a second frequency margin from the oil return frequency of the variable frequency compressor, and the second frequency margin can be 2Hz.
In a specific embodiment, when the air conditioning unit works in the refrigeration mode, if the continuous 120s monitors that the refrigeration requirement of the air conditioning unit is less than or equal to 0%, the actual value of the return air temperature in the current period is greater than or equal to the actual value of the return air temperature in the previous period, and the actual frequency of the compressor in the running state in the air conditioning unit is greater than the upper frequency limit value; clearing the low-load running flag;
and when the air conditioning unit works in the dehumidification mode, if the refrigerating requirement of the air conditioning unit is monitored to be more than 50% continuously for 120 seconds, and the actual value of the return air temperature in the current period is greater than or equal to the actual value of the return air temperature in the previous period, the low-load operation mark is cleared.
After the low-running mark is cleared, the air conditioner runs according to conventional control logic.
In one embodiment, the operating parameters further include actual rotational speed of the compressor and return air relative humidity; the clearing conditions of another low-load running flag of this embodiment are as follows:
if the fact that the actual rotating speed of the compressor in the running state in the air conditioning unit is larger than the steady-state running value of the compressor is monitored continuously for a third preset time period, the low-load running mark is cleared;
or if the air conditioning unit is monitored to have the return air relative humidity smaller than the low-humidity electric heating closing value for a third preset time period, the low-load operation mark is cleared;
or if the compressor is detected to exist to exit the refrigeration mode, the low-load running mark is cleared.
In the present embodiment, the setting range of the compressor steady-state operation value may be 20rps to 70rps, and preferably the compressor steady-state operation value is set to 35rps. The low-humidity electric heating off value may be set in a range of 20% to 80%, and preferably, the low-humidity electric heating off value may be 40%. The third preset time period may also be set to 30s.
In this embodiment, after the low-load operation flag is cleared, all the set loads are turned off, and the compressor shutdown command is no longer masked, and the operation mode of the air conditioning unit is switched according to the conventional control logic.
According to the embodiment, the low-load running mark is set, so that the air conditioner can be controlled to start setting load in the low-load running mark activation stage, the actual load of an air conditioning unit is improved, the heat in a machine room is not smaller than the minimum output cold quantity of the air conditioner, the problem that the air conditioner is high in humidity and generates condensation due to frequent shutdown of the low-load running is avoided, the temperature and humidity requirements in the machine room can still be guaranteed when the load of the machine room is low, and the requirements of a data center are met.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
The following are device embodiments of the invention, for details not described in detail therein, reference may be made to the corresponding method embodiments described above.
Fig. 3 is a schematic structural diagram of an air conditioner control device for a machine room according to an embodiment of the present invention, and for convenience of explanation, only the portions related to the embodiment of the present invention are shown, and the details are as follows:
as shown in fig. 3, the room air conditioner control device 100 includes:
an operation parameter obtaining module 110, configured to obtain an operation parameter of an air conditioning unit in real time; the operation parameters comprise an actual return air temperature value and the working state of the compressor;
the low-running flag starting module 120 is configured to activate a low-running flag if the actual value of the return air temperature of the air conditioning unit is monitored to meet the low return air temperature condition for a first preset period of time, and a compressor is in an running state in the air conditioning unit; the low return air temperature condition includes: the return air temperature difference value is smaller than the set deviation value; or the actual value of the return air temperature in the current period is smaller than the actual value of the return air temperature in the previous period; the return air temperature difference value is obtained by subtracting a return air temperature set value from a return air temperature actual value;
and the low-load running module 130 is used for keeping the compressor in the air conditioning unit running in the current working state according to the low-load running sign so as to keep the air conditioning unit running in a refrigeration mode or a dehumidification mode.
In one embodiment, the operating parameters further include an operating mode of the air conditioning unit;
the low-load operation module 130 includes:
the set load opening unit is used for controlling the opening of the set load corresponding to the machine room according to the low-running mark;
and/or a shutdown instruction shielding unit, configured to not execute a compressor shutdown instruction of the air conditioning unit when the low-running flag is in an activated state;
and/or a dehumidifying mode switching unit for controlling the working mode of the air conditioning unit to be switched into a dehumidifying mode according to the low-running mark.
In one embodiment, the set load includes a reheater and/or a separate heating device located near an evaporator of an air conditioning unit.
In one embodiment, the operating parameters further include an operating mode of the air conditioning unit, and the set load includes at least one; the load opening unit is specifically configured to:
when the air conditioning unit works in a refrigerating mode, if the number of compressors in an operating state in the air conditioning unit is larger than a first preset number; and starting all the set loads corresponding to the machine room.
In one embodiment, the operating parameters further include an operating mode of the air conditioning unit, a cooling demand, and an actual frequency of a compressor; the low-load-operation-flag enabling module 120 is specifically configured to:
when the air conditioning unit works in a refrigeration mode, if the refrigeration requirement of the air conditioning unit is monitored to be smaller than the first preset threshold value for the first preset duration, the actual value of the return air temperature meets the low return air temperature condition, and the actual frequencies of all compressors in the running state in the air conditioning unit are smaller than the frequency lower limit value; starting the low-load running mark;
and when the air conditioning unit works in a dehumidification mode, if the refrigerating requirement of the air conditioning unit is monitored to be smaller than the first preset threshold value and the actual value of the return air temperature meets the low return air temperature condition for a duration of the first preset time period, starting the low-load operation sign.
In one embodiment, the operating parameters further include return air relative humidity;
the low-load-operation-flag starting module 120 is specifically configured to:
and if the compressor in the air conditioning unit is in an operating state, the actual value of the return air temperature of the air conditioning unit meets the low return air temperature condition and the relative humidity of the return air is larger than the high-humidity electric heating starting value after the first preset time period is continuously monitored, starting the low-load operation sign.
In one embodiment, the room air conditioner control device 100 further includes a compressor rotation speed adjustment module for:
and controlling rated rotation speeds of all compressors in the air conditioning unit according to the low-running mark to be adjusted to be the oil return rotation speed of the compressors.
In one embodiment, the operating parameters further include an operating mode of the air conditioning unit, a cooling demand, and an actual frequency of a compressor; the machine room air conditioner control device 100 further includes a first flag clearing module configured to:
when the air conditioning unit works in a refrigeration mode, if the refrigeration requirement of the air conditioning unit is monitored to be smaller than a second preset threshold value for a second preset duration, the actual value of the return air temperature meets the condition of high return air temperature, and the actual frequency of the compressor in an operating state in the air conditioning unit is larger than the upper frequency limit value; clearing the low-load running flag;
when the air conditioning unit works in a dehumidification mode, if the refrigerating requirement of the air conditioning unit is monitored to be larger than a third preset threshold value and the actual value of the return air temperature meets the high return air temperature condition for the second preset duration, the low-load operation mark is cleared;
the high return air temperature condition comprises that the actual return air temperature value of the current period is larger than that of the previous period.
In one embodiment, the operating parameters further include actual rotational speed of the compressor and return air relative humidity;
the machine room air conditioner control device 100 further includes a second flag clearing module configured to:
after the activating the low-load-operation flag, the method further comprises:
if the fact that the actual rotating speed of the compressor in the running state in the air conditioning unit is larger than the steady-state running value of the compressor is monitored continuously for a third preset time period, the low-load running mark is cleared;
or if the air conditioning unit is monitored to have the return air relative humidity smaller than the low-humidity electric heating closing value for a third preset time period, the low-load operation mark is cleared;
or if the compressor is detected to exist to exit the refrigeration mode, the low-load running mark is cleared.
As can be seen from the above embodiments, in the embodiments of the present invention, operation parameters of the air conditioning unit are first obtained in real time; if the fact that the actual value of the return air temperature of the air conditioning unit meets the low return air temperature condition and the compressor in the air conditioning unit is in an operating state is monitored for a first preset time period, a low-operation mark is activated; and finally, keeping the compressor in the air conditioning unit to operate in the current working state according to the low-load operation sign. Through the scheme, the compressor can be guaranteed to be kept in a non-stop state when the air conditioning unit is in a low-load state, and the problem of high humidity of a machine room caused by frequent starting and stopping of the air conditioner in the low-load state is avoided.
Fig. 4 is a schematic diagram of a terminal according to an embodiment of the present invention. As shown in fig. 4, the terminal 4 of this embodiment includes: a processor 40, a memory 41 and a computer program 42 stored in the memory 41 and executable on the processor 40. The steps of the embodiments of the method for controlling air conditioning of the machine room described above, such as steps 101 to 103 shown in fig. 1, are implemented when the processor 40 executes the computer program 42. Alternatively, the processor 40, when executing the computer program 42, performs the functions of the modules/units of the apparatus embodiments described above, such as the functions of the units 110 to 130 shown in fig. 3.
Illustratively, the computer program 42 may be partitioned into one or more modules/units that are stored in the memory 41 and executed by the processor 40 to complete the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing the specified functions, which instruction segments are used for describing the execution of the computer program 42 in the terminal 4.
The terminal 4 may include, but is not limited to, a processor 40, a memory 41. It will be appreciated by those skilled in the art that fig. 4 is merely an example of the terminal 4 and is not limiting of the terminal 4, and may include more or fewer components than shown, or may combine some components, or different components, e.g., the terminal may further include input and output devices, network access devices, buses, etc.
The processor 40 may be a central processing unit (Central Processing Unit, CPU), other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field-programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 41 may be an internal storage unit of the terminal 4, such as a hard disk or a memory of the terminal 4. The memory 41 may also be an external storage device of the terminal 4, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the terminal 4. Further, the memory 41 may also include both an internal storage unit and an external storage device of the terminal 4. The memory 41 is used for storing the computer program as well as other programs and data required by the terminal. The memory 41 may also be used for temporarily storing data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference may be made to related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal and method may be implemented in other manners. For example, the apparatus/terminal embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present invention may implement all or part of the flow of the method of the foregoing embodiment, or may be implemented by instructing related hardware by a computer program, where the computer program may be stored in a computer readable storage medium, and the computer program may implement the steps of the method embodiment of air conditioning control of each machine room when executed by a processor. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable or in some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium may include content that is subject to appropriate increases and decreases as required by jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is not included as electrical carrier signals and telecommunication signals.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (7)
1. The control method of the air conditioner of the machine room is characterized by comprising the following steps:
acquiring operation parameters of an air conditioning unit in real time; the operation parameters comprise an actual return air temperature value, the working state of the compressor, the working mode of the air conditioning unit, the refrigeration requirement and the actual frequency of the compressor;
if the fact that the actual value of the return air temperature of the air conditioning unit meets the low return air temperature condition and the compressor in the air conditioning unit is in an operating state is monitored for a first preset time period, a low-operation mark is activated; the low return air temperature condition includes: the return air temperature difference value is smaller than the set deviation value; or the actual value of the return air temperature in the current period is smaller than the actual value of the return air temperature in the previous period; the return air temperature difference value is obtained by subtracting a return air temperature set value from a return air temperature actual value;
according to the low-load operation sign, the compressor in the air conditioning unit is kept to operate in a current working state so as to keep the air conditioning unit to operate in a refrigeration mode or a dehumidification mode;
if the air conditioning unit is monitored for a first preset duration that the actual value of the return air temperature of the air conditioning unit meets the low return air temperature condition and the compressor in the air conditioning unit is in an operating state, activating a low-running mark comprises the following steps: when the air conditioning unit works in a refrigeration mode, if the refrigeration requirement of the air conditioning unit is monitored to be smaller than a first preset threshold value for the first preset duration, the actual value of the return air temperature meets the low return air temperature condition, and the actual frequencies of all compressors in the running state in the air conditioning unit are smaller than a frequency lower limit value, the low-load running sign is started; when the air conditioning unit works in a dehumidification mode, if the refrigerating requirement of the air conditioning unit is monitored to be smaller than the first preset threshold value for the first preset duration and the actual value of the return air temperature meets the low return air temperature condition, the low-load operation sign is started;
wherein, according to the low-load operation sign, the compressor in the air conditioning unit is kept to operate in the current working state, and the method comprises the following steps: controlling the opening of a set load corresponding to the machine room according to the low-running mark; wherein the set load comprises at least one; the controlling the opening of the set load of the machine room according to the low-load running flag includes: when the air conditioning unit works in a refrigeration mode, if the number of compressors in an operation state in the air conditioning unit is larger than a first preset number, starting all set loads corresponding to the machine room;
wherein after the activating the low-load-operation flag, the method further comprises: when the air conditioning unit works in a refrigeration mode, if the refrigeration requirement of the air conditioning unit is monitored to be smaller than a second preset threshold value for a second preset duration, the actual value of the return air temperature meets the condition of high return air temperature, and the actual frequency of a compressor in an operation state in the air conditioning unit is larger than the upper limit value of the frequency, the low-load operation mark is cleared; when the air conditioning unit works in a dehumidification mode, if the refrigerating requirement of the air conditioning unit is monitored to be larger than a third preset threshold value and the actual value of the return air temperature meets the high return air temperature condition for the second preset duration, the low-load operation mark is cleared; the high return air temperature condition comprises that the actual return air temperature value of the current period is larger than that of the previous period.
2. A machine room air conditioning control method according to claim 1, wherein the set load includes a reheater and/or an independent heating device located near an evaporator of an air conditioning unit.
3. The machine room air conditioner control method of claim 1, wherein the operating parameters further comprise return air relative humidity;
if the air conditioning unit is monitored for a first preset duration that the actual value of the return air temperature of the air conditioning unit meets the low return air temperature condition and the compressor in the air conditioning unit is in an operating state, activating a low-running mark, including:
and if the compressor in the air conditioning unit is in an operating state, the actual value of the return air temperature of the air conditioning unit meets the low return air temperature condition and the relative humidity of the return air is larger than the high-humidity electric heating starting value after the first preset time period is continuously monitored, starting the low-load operation sign.
4. The machine room air conditioner control method according to claim 1, wherein after the activation of the low-run flag, the method further comprises:
and controlling rated rotation speeds of all compressors in the air conditioning unit according to the low-running mark to be adjusted to be the oil return rotation speed of the compressors.
5. The machine room air conditioner control method of any one of claims 1 or 4, wherein the operating parameters further include an actual rotational speed of the compressor and a return air relative humidity;
after the activating the low-load-operation flag, the method further comprises:
if the fact that the actual rotating speed of the compressor in the running state in the air conditioning unit is larger than the steady-state running value of the compressor is monitored continuously for a third preset time period, the low-load running mark is cleared;
or if the air conditioning unit is monitored to have the return air relative humidity smaller than the low-humidity electric heating closing value for a third preset time period, the low-load operation mark is cleared;
or if the compressor is detected to exist to exit the refrigeration mode, the low-load running mark is cleared.
6. A terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of the preceding claims 1 to 5 when the computer program is executed.
7. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method according to any of the preceding claims 1 to 5.
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| CN115900007B (en) * | 2023-03-09 | 2023-06-23 | 浙江德塔森特数据技术有限公司 | Temperature-adjusting and dehumidifying method and device for rack-mounted air conditioner |
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