CN113983661A - Machine room air conditioner control method, terminal and storage medium - Google Patents
Machine room air conditioner control method, terminal and storage medium Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000003860 storage Methods 0.000 title claims abstract description 13
- 238000004378 air conditioning Methods 0.000 claims abstract description 158
- 238000005057 refrigeration Methods 0.000 claims abstract description 50
- 238000007791 dehumidification Methods 0.000 claims abstract description 29
- 230000003213 activating effect Effects 0.000 claims abstract description 16
- 238000004590 computer program Methods 0.000 claims description 20
- 238000005485 electric heating Methods 0.000 claims description 12
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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
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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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- 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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Abstract
The invention provides a control method, a terminal and a storage medium for a machine room air conditioner, wherein the method comprises the following steps: acquiring the operation parameters of the air conditioning unit in real time; if the actual value of the return air temperature of the air conditioning unit meets the low return air temperature condition and a compressor in the air conditioning unit is in a running state after being monitored for a first preset duration, activating a low-load running mark; and keeping a compressor in the air conditioning unit to operate in the current working state according to the low-load operation mark 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 low load, the problem that the air conditioner frequently starts and stops the machine room high humidity caused in the low load state is avoided, and the air conditioner can still effectively guarantee the temperature and humidity requirement in the machine room when the load of the machine room is low.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method of a machine room air conditioner, a terminal and a storage medium.
Background
The low-load dehumidification means that the air conditioner load is very low and along with the dehumidification demand, the cold volume range of the air conditioner under the mode possibly exceeds the low load range of the air conditioner, and the external environment temperature still can be reduced under the effect of the cold volume of the air conditioner at the moment, so that the air conditioning system is stopped, the external environment high humidity is caused, and the phenomenon of out-of-control humidity is caused.
Most of newly-built data centers at present tend to select the variable frequency air conditioner based on energy-saving consideration, but because the refrigeration capacity range is generally higher when the air conditioner effectively dehumidifies, the problems of frequent start and stop and incapability of stably dehumidifying still exist when the air conditioner is in 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 machine room air conditioner control method, a terminal and a storage medium, which can solve the problem of high humidity of a machine room caused by frequent start and stop of an air conditioner under low load.
In a first aspect, an embodiment of the present invention provides a method for controlling an air conditioner of a machine room, including:
acquiring the operation parameters of the air conditioning unit in real time; the operation parameters comprise the actual value of the return air temperature and the working state of the compressor;
if the actual value of the return air temperature of the air conditioning unit meets the low return air temperature condition and a compressor in the air conditioning unit is in a running state after being monitored for a first preset duration, activating a low-load running mark; the low return air temperature conditions include: the difference value of the return air temperature is smaller than the set deviation value; or the actual value of the return air temperature in the current period is smaller than that in the previous period; the return air temperature difference value is obtained by subtracting a return air temperature set value from an actual return air temperature value;
and keeping a compressor in the air conditioning unit to operate in the current working state according to the low-load operation mark 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, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the steps of the method according to any one of the possible implementation manners of the first aspect.
In a third aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements the steps of the method according to any one of the possible implementation manners of the first aspect.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
the method comprises the steps of firstly, acquiring the operation parameters of the air conditioning unit in real time; if the actual value of the return air temperature of the air conditioning unit meets the low return air temperature condition and a compressor in the air conditioning unit is in a running state after being monitored for a first preset duration, activating a low-load running mark; and keeping a compressor in the air conditioning unit to operate in the current working state according to the low-load operation mark so as to keep the air conditioning unit to operate in a refrigeration mode or a dehumidification mode. Through the above scheme, this embodiment can keep the compressor to be in the running state when air conditioning unit hangs down, avoids the air conditioner frequently to open and stop the high humidity problem of computer lab that leads to under the state of hanging down, makes the air conditioner can still effectively ensure the humiture requirement in the computer lab when the computer lab load ratio is lower.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is an application scenario diagram of a control method for an air conditioner in a machine room according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an air conditioner provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a machine room air conditioner control device provided in 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 particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the 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.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following description is made by way of specific embodiments with reference to the accompanying drawings.
Referring to fig. 1, it shows a flowchart of an implementation of a control method for a machine room air conditioner provided in an embodiment of the present invention, and details are as follows:
s101: acquiring the operation parameters of the air conditioning unit in real time; the operating parameters include the actual value of the return air temperature and the operating condition of the compressor.
The execution main body (terminal) of the embodiment may be a machine room moving loop monitoring system, and may also be a controller of the air conditioning unit itself.
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 unit and an outer unit, the inner unit includes a dry filter, a sight glass, a throttling component, an evaporator, a low-pressure sensor, a compressor, and oil, which are connected in sequence; 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 the outlet of the condenser is provided with a high-pressure sensor.
In this embodiment, the operating parameters of the air conditioning unit include the actual value of the return air temperature, and the actual value of the return air temperature is monitored by the return air temperature sensor installed at the return air inlet of the air conditioner. The air conditioning unit comprises at least one compressor, and the working state of the compressor comprises an operating state and a stopping state.
S102: if the actual value of the return air temperature of the air conditioning unit meets the low return air temperature condition and a compressor in the air conditioning unit is in a running state after being monitored for a first preset duration, activating a low-load running mark; the low return air temperature conditions include: the difference value of the return air temperature is smaller than the set deviation value; or the actual value of the return air temperature in the current period is smaller than that in the previous period; the return air temperature difference value is obtained by subtracting a return air temperature set value from an actual return air temperature value.
In this embodiment, before executing the step of S102, the terminal needs to first determine whether the air conditioning unit ends the soft start or the protection adjustment, and if the air conditioning unit ends the soft start or the protection adjustment, the terminal starts to execute S102 after starting from the end time by a preset time period. For example, the preset time period may be 60 s.
When the actual value of the return air temperature meets the condition of low return air temperature, the current environment temperature is lower, if the compressor in the air conditioning unit is in the running state, the air conditioning unit is in a cooling mode or a dehumidifying mode, the current air conditioning unit still outputs cooling capacity to the environment, when the actually required output cold energy of the air conditioning unit is lower than the lowest output cold energy of the air conditioning unit, the air conditioner stops due to low load, because the machine room of the data center is usually a closed narrow space such as a cabinet, when the air conditioner is stopped at a low load, the compressor is stopped firstly, at the moment, the inner fan is still started, the started inner fan can blow condensed water which is not taken out from the evaporator back to the machine room, the narrow space of the machine room can cause the surge of indoor humidity due to the frequent start and stop of the compressor, in order to avoid the problem of high humidity in the machine room caused by low-load shutdown of the air conditioner, the low-load running mark needs to be activated.
Specifically, the setting range of the deviation value is set to be 0-20 ℃. Preferably, the set deviation value may be 2 ℃.
S103: and keeping a compressor in the air conditioning unit to operate in the current working state according to the low-load operation mark 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 dehumidification mode is a mode including a dehumidification 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 that the compressor in the air conditioning unit is in an operating state, so that the dehumidification function can be realized as long as the compressor is in the operating state, and the high-humidity problem of a machine room is avoided; therefore, the present embodiment controls the compressor in the air conditioning unit to be kept in the current working state when the low load running flag is activated, that is, the compressor in the running state is kept not to stop.
As can be seen from the above embodiments, in the embodiments of the present invention, firstly, the operation parameters of the air conditioning unit are obtained in real time; if the actual value of the return air temperature of the air conditioning unit meets the low return air temperature condition and a compressor in the air conditioning unit is in a running state after being monitored for a first preset duration, activating a low-load running mark; and finally, keeping the compressor in the air conditioning unit to operate in the current working state according to the low-load operation mark. Through the scheme, the compressor can be guaranteed not to stop when the air conditioning unit is in low load, and the problem of high humidity of a machine room caused by frequent starting and stopping of the air conditioner in a low load state is avoided.
In one embodiment, the operating parameters further include an operating mode of the air conditioning unit;
the specific implementation process of S103 includes:
controlling the set load corresponding to the machine room to be started according to the low-load running mark;
and/or when the low load running mark is in an activated state, not executing a compressor stop instruction of the air conditioning unit;
and/or controlling the working mode of the air conditioning unit to be switched into a dehumidification mode according to the low-load running mark.
In one embodiment, the set load includes a reheater and/or a separate heating device located near an evaporator of the air conditioning train.
In the present embodiment, the set load includes at least one of a reheater and a separate heating device. The reheater is the heating device of air conditioning unit self-bring, can realize dehumidification heating function. The independent heating device can be a heating device which is positioned in the machine room and is arranged independently. The separate heating device may also be installed 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 above-mentioned load according to setting of low year line mark control computer lab is opened, includes:
when the air conditioning unit works in a refrigeration mode, if the number of compressors in the running state in the air conditioning unit is greater than a first preset number; and starting all the set loads corresponding to the machine room.
In this embodiment, after the low load running flag is activated, if the exit condition of the low load running flag is not satisfied, the air conditioning unit always maintains the operating state in which the low load running flag is activated. If the air conditioning unit works in a refrigeration mode and the number of the compressors in the running state is larger than a first preset number, the current refrigeration capacity of the 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 the compressors in the current 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 cooling mode and the number of the 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 preset number may be 1.
In one embodiment, the operating parameters further include an operating mode of the air conditioning unit, a refrigeration demand, and an actual frequency of a compressor; the working modes of the air conditioning unit comprise a cooling mode and a dehumidifying mode. The specific implementation process 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 the compressors in the running state in the air conditioning unit are smaller than the lower frequency limit value; activating the low load flag;
when the air conditioning unit works in a dehumidification mode, if the refrigeration 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 first preset duration, the low-load running mark is started.
Specifically, the calculation process of the refrigeration requirement comprises the following steps:
acquiring the current ambient temperature of a machine room and the set temperature of an air conditioning unit;
based on the formula
Obtaining a refrigeration demand, wherein T1Indicating the current ambient temperature, TsIndicating a set temperature and deltat a preset sensitivity.
For example, if the current ambient temperature is 25 degrees, the set temperature is 24 degrees, and the preset sensitivity is 3 degrees, the cooling demand is 33%.
In particular, the first preset threshold is a value less than zero, which may be-50%. The lower frequency limit value is the sum of the lowest frequency of the inverter compressor and a first frequency margin, for example, the first frequency margin may be 5Hz, and the first preset time period may be 30 s.
As a specific example, the specific condition for activating the low load line flag may include:
when the air conditioning unit works in a refrigeration mode, if the refrigeration requirement of the air conditioning unit is monitored to be less than or equal to-50% for 30s continuously, 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 the compressors in the running state in the air conditioning unit are smaller than the lower frequency limit value; activating the low load flag;
when the air conditioning unit works in a dehumidification mode, if the refrigeration requirement of the air conditioning unit is monitored to be less than or equal to-50% for 30s continuously, and the actual value of the return air temperature in the current period is smaller than that in the previous period, the low-load running mark is started.
In one embodiment, the operating parameters further include return air relative humidity;
another implementation flow of S102 may further include:
and if the first preset time duration is continued, the compressor in the air conditioning unit is monitored to be in the running 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 greater than the high-humidity electric heating starting value, the low-load running mark is started.
In this embodiment, the relative humidity of the return air is monitored by a humidity sensor disposed at the return air inlet of the air conditioner. The high wet electric heating start value can be set in the range of 20% to 80%, and preferably, the high wet electric heating start value is 45%. The judgment of the relative humidity of the return air is to avoid that the machine room enters a low-humidity state when the air conditioner is subjected to low-load dehumidification, so that a high-humidity electric heating starting value is added as a high-humidity threshold value.
Specifically, if the compressor is monitored to be in the refrigeration mode for 30 seconds continuously, the return air temperature difference value is smaller than the set deviation value, and the return air relative humidity is larger than the high-humidity electric heating starting value, it is indicated that the current machine room is in a low-load high-humidity state, and therefore the low-load running mark is activated.
In an embodiment, after S102, the method provided in this embodiment further includes:
and controlling the rated rotating speeds of all the compressors in the air conditioning unit to be adjusted to the oil return rotating speeds of the compressors according to the low-load running mark.
In one embodiment, the operating parameters further include an operating mode of the air conditioning unit, a refrigeration 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 a compressor in a running state in the air conditioning unit is greater than the upper limit value of the frequency; clearing the low load running flag;
when the air conditioning unit works in a dehumidification mode, if the refrigeration requirement of the air conditioning unit is monitored to be greater than a third preset threshold value for the second preset duration and the actual value of the return air temperature meets the high return air temperature condition, the low-load running mark is removed;
the high return air temperature condition includes the actual value of the return air temperature in the current cycle being greater than the actual value of the return air temperature in the previous cycle.
In this embodiment, the second preset threshold may be 0%, and the third preset threshold may be a value greater than zero, and may specifically be 50%. The second preset time period may be 120 s. The upper limit value of the frequency 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 2 Hz.
In a specific embodiment, when the air conditioning unit works in a refrigeration mode, if it is monitored for 120 seconds 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 a compressor in an operating state in the air conditioning unit is greater than the upper frequency limit value; clearing the low load running flag;
when the air conditioning unit works in a dehumidification mode, if the refrigeration requirement of the air conditioning unit is greater than 50% 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 after being monitored for 120s continuously, the low-load running mark is cleared.
After the low load running flag is cleared, the air conditioner runs according to the conventional control logic.
In one embodiment, the operating parameters further include actual speed of the compressor and return air relative humidity; another clearing condition of the low load flag of this embodiment is as follows:
if the fact that the actual rotating speed of a compressor in the running state in the air conditioning unit is greater than the steady-state running value of the compressor is monitored for a third preset duration, the low-load running mark is cleared;
or if the relative humidity of return air of the air conditioning unit is monitored to be smaller than the low-humidity electric heating closing value for a third preset time, the low-load running mark is removed;
or if the condition that the compressor exits the refrigeration mode is monitored, clearing the low load running mark.
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 35 rps. The low-humidity electric heating off value can be set in a range of 20% -80%, and preferably, the low-humidity electric heating off value can be 40%. The third preset duration may also be set to 30 s.
In this embodiment, after clearing the low load running flag, all the set loads are turned off, and the compressor stop command is no longer masked, and the operating mode of the air conditioning unit is switched according to the conventional control logic.
This embodiment is through setting up the low mark of carrying, can control the air conditioner and open the settlement load in the low mark activation phase of carrying, improves air conditioning unit's actual load, makes the heat in the computer lab not less than the minimum output cold volume of air conditioner to avoid the air conditioner to carry frequently to shut down the problem that leads to the high wet production condensation of computer lab because of the low, make the air conditioner still can ensure the humiture demand in the computer lab when the computer lab load is lower, satisfy data center's requirement.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
The following are embodiments of the apparatus of the invention, reference being made to the corresponding method embodiments described above for details which are not described in detail therein.
Fig. 3 is a schematic structural diagram of a machine room air conditioner control device according to an embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown, and detailed descriptions are as follows:
as shown in fig. 3, the machine room air conditioning control device 100 includes:
an operation parameter obtaining module 110, configured to obtain an operation parameter of the air conditioning unit in real time; the operation parameters comprise the actual value of the return air temperature and the working state of the compressor;
the low-load running mark starting module 120 is configured to activate a low-load running mark if it is monitored that the actual value of the return air temperature of the air conditioning unit meets the low-return air temperature condition for a first preset duration and a compressor in the air conditioning unit is in a running state; the low return air temperature conditions include: the difference value of the return air temperature is smaller than the set deviation value; or the actual value of the return air temperature in the current period is smaller than that in the previous period; the return air temperature difference value is obtained by subtracting a return air temperature set value from an actual return air temperature value;
and a low load running module 130, configured to keep a compressor in the air conditioning unit running in a current working state according to the low load running flag, so that the air conditioning unit is kept running in a cooling mode or a dehumidification mode.
In one embodiment, the operating parameters further include an operating mode of the air conditioning unit;
the low load module 130 includes:
the set load starting unit is used for controlling the set load corresponding to the machine room to be started according to the low load running mark;
and/or, a shutdown instruction shielding unit, which is used for not executing the shutdown instruction of the compressor of the air conditioning unit when the low load running mark is in an activated state;
and/or the dehumidification mode switching unit is used for controlling the working mode of the air conditioning unit to be switched into the dehumidification mode according to the low-load running mark.
In one embodiment, the set load includes a reheater and/or a separate heating device located near an evaporator of the air conditioning train.
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 set load starting unit is specifically configured to:
when the air conditioning unit works in a refrigeration mode, if the number of compressors in the running state in the air conditioning unit is greater 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 refrigeration demand, and an actual frequency of a compressor; the low load flag activation 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 the compressors in the running state in the air conditioning unit are smaller than the lower frequency limit value; activating the low load flag;
when the air conditioning unit works in a dehumidification mode, if the refrigeration 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 first preset duration, the low-load running mark is started.
In one embodiment, the operating parameters further include return air relative humidity;
the low load running flag starting module 120 is specifically configured to:
and if the first preset time duration is continued, the compressor in the air conditioning unit is monitored to be in the running 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 greater than the high-humidity electric heating starting value, the low-load running mark is started.
In one embodiment, the machine room air conditioner controlling apparatus 100 further includes a compressor speed adjusting module for:
and controlling the rated rotating speeds of all the compressors in the air conditioning unit to be adjusted to the oil return rotating speeds of the compressors according to the low-load running mark.
In one embodiment, the operating parameters further include an operating mode of the air conditioning unit, a refrigeration demand, and an actual frequency of a compressor; the machine room air conditioning 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 a compressor in a running state in the air conditioning unit is greater than the upper limit value of the frequency; clearing the low load running flag;
when the air conditioning unit works in a dehumidification mode, if the refrigeration requirement of the air conditioning unit is monitored to be greater than a third preset threshold value for the second preset duration and the actual value of the return air temperature meets the high return air temperature condition, the low-load running mark is removed;
the high return air temperature condition includes the actual value of the return air temperature in the current cycle being greater than the actual value of the return air temperature in the previous cycle.
In one embodiment, the operating parameters further include actual speed of the compressor and return air relative humidity;
the machine room air conditioning control device 100 further includes a second flag clearing module configured to:
after the activating the low ship to go flag, the method further comprises:
if the fact that the actual rotating speed of a compressor in the running state in the air conditioning unit is greater than the steady-state running value of the compressor is monitored for a third preset duration, the low-load running mark is cleared;
or if the relative humidity of return air of the air conditioning unit is monitored to be smaller than the low-humidity electric heating closing value for a third preset time, the low-load running mark is removed;
or if the condition that the compressor exits the refrigeration mode is monitored, clearing the low load running mark.
As can be seen from the above embodiments, in the embodiments of the present invention, firstly, the operation parameters of the air conditioning unit are obtained in real time; if the actual value of the return air temperature of the air conditioning unit meets the low return air temperature condition and a compressor in the air conditioning unit is in a running state after being monitored for a first preset duration, activating a low-load running mark; and finally, keeping the compressor in the air conditioning unit to operate in the current working state according to the low-load operation mark. Through the scheme, the compressor can be guaranteed not to stop when the air conditioning unit is in low load, and the problem of high humidity of a machine room caused by frequent starting and stopping of the air conditioner in a 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 said memory 41 and executable on said processor 40. The processor 40 executes the computer program 42 to implement the steps in each of the above-described embodiments of the room air conditioning control method, such as the steps 101 to 103 shown in fig. 1. Alternatively, the processor 40, when executing the computer program 42, implements the functions of the modules/units in the above-mentioned device embodiments, 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 implement the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe 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. Those skilled in the art will appreciate that fig. 4 is only an example of a terminal 4 and does not constitute a limitation of terminal 4 and may include more or less components than those shown, or some components in combination, or different components, for example, the terminal may also include input output devices, network access devices, buses, etc.
The Processor 40 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. 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) and the like 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 and other programs and data required by the terminal. The memory 41 may also be used to temporarily store 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-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of 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 processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
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 implementation. 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 ways. For example, the above-described apparatus/terminal embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed 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 can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method according to the above embodiments may be implemented by a computer program, which may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the steps of the above embodiments of the room air conditioner control method may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable, or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (11)
1. A control method of a machine room air conditioner is characterized by comprising the following steps:
acquiring the operation parameters of the air conditioning unit in real time; the operation parameters comprise the actual value of the return air temperature and the working state of the compressor;
if the actual value of the return air temperature of the air conditioning unit meets the low return air temperature condition and a compressor in the air conditioning unit is in a running state after being monitored for a first preset duration, activating a low-load running mark; the low return air temperature conditions include: the difference value of the return air temperature is smaller than the set deviation value; or the actual value of the return air temperature in the current period is smaller than that in the previous period; the return air temperature difference value is obtained by subtracting a return air temperature set value from an actual return air temperature value;
and keeping a compressor in the air conditioning unit to operate in the current working state according to the low-load operation mark so as to keep the air conditioning unit to operate in a refrigeration mode or a dehumidification mode.
2. The computer room air conditioner control method of claim 1, wherein the operating parameters further include an operating mode of the air conditioning unit;
the enabling of the compressor in the air conditioning unit to be operated in the current working state according to the low-load operation mark comprises the following steps:
controlling the set load corresponding to the machine room to be started according to the low-load running mark;
and/or when the low load running mark is in an activated state, not executing a compressor stop instruction of the air conditioning unit;
and/or controlling the working mode of the air conditioning unit to be switched into a dehumidification mode according to the low-load running mark.
3. The machine room air conditioning control method according to claim 2, wherein the set load includes a reheater and/or a separate heating device located near an evaporator of the air conditioning unit.
4. The machine room air conditioner control method according to claim 2, wherein the operating parameters further include an operating mode of the air conditioning unit, and the set load includes at least one;
the load according to setting of low year line mark control computer lab is opened, includes:
when the air conditioning unit works in a refrigeration mode, if the number of compressors in the running state in the air conditioning unit is greater than a first preset number; and starting all the set loads corresponding to the machine room.
5. The computer room air conditioner control method of claim 1, wherein the operation parameters further include an operation mode of the air conditioning unit, a refrigeration demand, and an actual frequency of a compressor;
if it monitors to last first predetermined duration the return air temperature actual value of air conditioning unit satisfies low return air temperature condition, just there is the compressor in the air conditioning unit in the running state, then activates and hangs down the line mark, include:
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 the compressors in the running state in the air conditioning unit are smaller than the lower frequency limit value; activating the low load flag;
when the air conditioning unit works in a dehumidification mode, if the refrigeration 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 first preset duration, the low-load running mark is started.
6. The machine room air conditioner control method of claim 1, wherein the operating parameters further include return air relative humidity;
if it monitors to last first predetermined duration the return air temperature actual value of air conditioning unit satisfies low return air temperature condition, just there is the compressor in the air conditioning unit in the running state, then activates and hangs down the line mark, include:
and if the first preset time duration is continued, the compressor in the air conditioning unit is monitored to be in the running 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 greater than the high-humidity electric heating starting value, the low-load running mark is started.
7. The machine room air conditioner control method according to claim 1, wherein after the activating of the low load running flag, the method further comprises:
and controlling the rated rotating speeds of all the compressors in the air conditioning unit to be adjusted to the oil return rotating speeds of the compressors according to the low-load running mark.
8. The machine room air conditioner control method according to any one of claims 1 or 5, wherein the operation parameters further include an operation mode of the air conditioning unit, a refrigeration demand, and an actual frequency of a compressor;
after the activating the low ship to go 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 a running state in the air conditioning unit is greater than the upper limit value of the frequency; clearing the low load running flag;
when the air conditioning unit works in a dehumidification mode, if the refrigeration requirement of the air conditioning unit is monitored to be greater than a third preset threshold value for the second preset duration and the actual value of the return air temperature meets the high return air temperature condition, the low-load running mark is removed;
the high return air temperature condition includes the actual value of the return air temperature in the current cycle being greater than the actual value of the return air temperature in the previous cycle.
9. The machine room air conditioner control method according to any one of claims 1 or 6, wherein the operation parameters further include an actual rotation speed of a compressor and a return air relative humidity;
after the activating the low ship to go flag, the method further comprises:
if the fact that the actual rotating speed of a compressor in the running state in the air conditioning unit is greater than the steady-state running value of the compressor is monitored for a third preset duration, the low-load running mark is cleared;
or if the relative humidity of return air of the air conditioning unit is monitored to be smaller than the low-humidity electric heating closing value for a third preset time, the low-load running mark is removed;
or if the condition that the compressor exits the refrigeration mode is monitored, clearing the low load running mark.
10. 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 9 when executing the computer program.
11. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 9.
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