CN107917509B - Control method of air conditioning system of machine room - Google Patents
Control method of air conditioning system of machine room Download PDFInfo
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- CN107917509B CN107917509B CN201710975340.XA CN201710975340A CN107917509B CN 107917509 B CN107917509 B CN 107917509B CN 201710975340 A CN201710975340 A CN 201710975340A CN 107917509 B CN107917509 B CN 107917509B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims description 36
- 238000007791 dehumidification Methods 0.000 claims description 34
- 238000005057 refrigeration Methods 0.000 claims description 18
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 description 14
- 238000001816 cooling Methods 0.000 description 11
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Abstract
The invention discloses a control method of a machine room air conditioning system, which comprises the steps of obtaining the return air temperature or/and the return air humidity of each started air conditioner at intervals of first set time; calculating the average return air temperature or/and the average return air humidity; controlling the operation of each starting air conditioner according to the average return air temperature and the target temperature set value, or/and controlling the operation of each starting air conditioner according to the average return air humidity and the target humidity set value; therefore, the problem of local hot spots in the machine room is solved, the stability of the temperature or/and the humidity in the machine room is kept, and a stable operation environment is provided for the electronic equipment in the machine room; and simultaneously, the purpose of energy conservation is achieved.
Description
Technical Field
The invention belongs to the technical field of machine room air conditioners, and particularly relates to a control method of a machine room air conditioning system.
Background
With the economic development, the electronic communication industry develops rapidly, the area of a corresponding electronic equipment room is larger and larger, the number of electronic cabinets in one room is gradually increased, and a small data center is developed into a large-scale or ultra-large IDC data center with dozens or even hundreds of built-in electronic cabinets. Due to the increase of the room area, the increase of the number of the cabinets, the difference of the power load of each cabinet and the unreasonable arrangement of cooling air conditioners in the rooms, the problem of local hot spots is easily caused in the large-scale data machine room, a certain position or a plurality of positions in the room cannot be effectively cooled, the temperature of the cabinet at the position is increased, namely, the cabinet has the local hot spots, electrical elements are in a high-temperature environment after the temperature is increased, the stability of the elements is poor due to the poor heat dissipation, the service life is influenced, and the adverse phenomena such as burning loss, server crash and the like occur under severe conditions.
The existing machine room is mainly independent air conditioners for cooling electronic equipment, a plurality of air conditioners are placed in the room, each air conditioner operates independently, unified management is not carried out between the air conditioners, and local hot spots in the room are easily generated. In addition, due to the fact that the temperature of each place of a room is uneven, each air conditioner operates independently, the air conditioner in a low-temperature area operates in a heating mode, the air conditioner in a high-temperature area operates in a cooling mode, the air conditioner in a high-humidity area operates in a dehumidifying mode, the air conditioner in a low-humidity area operates in a humidifying mode, and the operation of the air conditioners in different modes (the cooling mode and the heating mode are different modes, and the dehumidifying mode and the humidifying mode are different modes) in the same room area causes great energy waste.
Disclosure of Invention
The invention provides a control method of a machine room air conditioning system, which solves the problem of local hot spots in a machine room.
In order to solve the technical problems, the invention adopts the following technical scheme:
a control method of a machine room air conditioning system comprises N air conditioners, wherein each air conditioner comprises an indoor unit and an outdoor unit; the control method comprises the following steps:
(1) acquiring the return air temperature of each started air conditioner or/and the return air humidity of each started air conditioner every other first set time;
(2) calculating average return air temperature
Or/and, average return air humidity
Wherein, TwiReturn air temperature, Ts, for the ith air conditioneriSetting the return air humidity of the ith starting air conditioner as i ═ 1,2,3,. and n, wherein n is the number of the starting air conditioners; n is less than or equal to N;
(3) controlling the operation of each start-up air conditioner according to the average return air temperature Twp and the target temperature set value Tws:
(31) when Twp is more than or equal to Tws + deltat:
if TwiIf the Tws + deltat is more than or equal to Tws, the ith starting air conditioner performs refrigeration operation;
if Tws-deltat < TwiIf the Tws + deltat is less than the Tws, the ith starting air conditioner performs air supply operation;
if TwiIf the Tws-deltat is less than or equal to Tws, the ith starting air conditioner supplies air to operate;
(32) when Tws- δ t < Twp < Tws + δ t:
if TwiIf the Tws + deltat is more than or equal to Tws, the ith starting air conditioner performs refrigeration operation;
if Tws-deltat < TwiIf < Tws + deltat, then the ith start-up air conditionerAir supply operation;
if TwiIf the Tws-deltat is less than or equal to Tws, the ith starting air conditioner performs heating operation;
(33) when Twp is not more than Tws- δ t:
if TwiIf the Tws + deltat is more than or equal to Tws, the ith starting air conditioner performs air supply operation;
if Tws-deltat < TwiIf the Tws + deltat is less than the Tws, the ith starting air conditioner performs air supply operation;
if TwiIf the Tws-deltat is less than or equal to Tws, the ith starting air conditioner performs heating operation;
wherein, δ t is a temperature control precision value;
and/or, (4) controlling the operation of each starting air conditioner according to the average return air humidity Tsp and the target humidity set value Tss:
(41) when Tsp is more than or equal to Tss + delta h:
if TsiIf the Tss + delta h is more than or equal to Tss, the ith starting air conditioner performs dehumidification operation;
if Tss-delta h is less than TsiIf the Tss + delta h is less than the Tss, the ith starting air conditioner supplies air to operate;
if TsiIf the Tss-delta h is less than or equal to, the ith starting air conditioner supplies air to operate;
(42) when Tss- δ h < Tsp < Tss + δ h:
if TsiIf the Tss + delta h is more than or equal to Tss, the ith starting air conditioner performs dehumidification operation;
if Tss-delta h is less than TsiIf the Tss + delta h is less than the Tss, the ith starting air conditioner supplies air to operate;
if TsiIf the Tss-delta h is less than or equal to, the ith starting air conditioner is humidified and operated;
(43) when Tsp is less than or equal to Tss- δ h:
if TsiIf the Tss + delta h is more than or equal to Tss, the ith starting air conditioner supplies air to operate;
if Tss-delta h is less than TsiIf the Tss + delta h is less than the Tss, the ith starting air conditioner supplies air to operate;
if TsiIf the Tss-delta h is less than or equal to, the ith starting air conditioner is humidified and operated;
wherein δ h is a humidity control accuracy value.
Further, before the step (1), the control method further includes: sequentially and circularly selecting n air conditioners to be started and run for a second set time, and enabling the rest air conditioners to be in standby, wherein the total refrigerating capacity of the n air conditioners is more than or equal to the total full heat load of all heating equipment in the machine room; wherein N is less than or equal to N, and N is the number of all air conditioners; the second set time is greater than the first set time.
Still further, the control method further includes:
obtaining the difference value delta Twp between the calculated Twp and the average return air temperature calculated last time;
if Twp is more than or equal to Tws + deltat and delta Twp is more than or equal to a first set temperature difference value, starting an air conditioner in a standby state for refrigerating operation; wherein the first set temperature difference value is greater than 0;
if Twp is not more than Tws-deltat and the delta Twp is not more than a second set temperature difference value, the air conditioner in the standby state is increased for heating operation; wherein the second set temperature difference value is less than 0;
if Tws-deltat/2 < Twp < Tws + deltat/2, controlling all the air conditioners which are additionally opened to stand by.
Further, the control method further includes:
acquiring a difference value delta Tsp between the Tsp calculated this time and the average return air humidity calculated last time;
if Tsp is more than or equal to Tss + δ h and Δ Tsp is more than or equal to a first set humidity difference value, starting an air conditioner in a standby state for dehumidification operation; wherein the first set humidity difference value is greater than 0;
if Tsp is less than or equal to Tss- δ h and Δ Tsp is less than or equal to a second set humidity difference value, starting an air conditioner in a standby state for humidifying operation; wherein the second set humidity difference value is less than 0;
and if the Tss-delta h/2 is less than the Tsp and less than the Tss + delta h/2, controlling all the additionally opened air conditioners to stand by.
Preferably, the value range of delta t is 1-5.
Preferably, the value range of delta h is 1-10.
Preferably, the first set temperature difference value is 1 and the second set temperature difference value is-1.
Preferably, the first set humidity difference value is 2 and the second set humidity difference value is-2.
Further, the control method further includes: optionally selecting one air conditioner as a host machine, and the other air conditioners as slave machines; the control panel of the host is respectively connected with the control panel of each slave to control the operation of each slave; when the master is in standby, the control board of the master still controls the operation of each slave.
Compared with the prior art, the invention has the advantages and positive effects that: the control method of the air conditioning system of the machine room obtains the return air temperature or/and the return air humidity of each started air conditioner at intervals of first set time; calculating the average return air temperature or/and the average return air humidity; controlling the operation of each starting air conditioner according to the average return air temperature and the target temperature set value, or/and controlling the operation of each starting air conditioner according to the average return air humidity and the target humidity set value; therefore, the problem of local hot spots in the machine room is solved, the stability of the temperature or/and the humidity in the machine room is kept, and a stable operation environment is provided for the electronic equipment in the machine room; and simultaneously, the purpose of energy conservation is achieved.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Drawings
Fig. 1 is a flowchart of an embodiment of a control method for an air conditioning system of a computer room according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.
In the control method of the air conditioning system of the machine room in the embodiment, the air conditioning system includes N air conditioners, each air conditioner includes an indoor unit and an outdoor unit, the air conditioners are connected with the outdoor units, the indoor units are installed in the machine room, and the outdoor units are installed outside the machine room.
In this embodiment, in order to facilitate control of the operation of the entire air conditioning system, one of the air conditioners is optionally selected as a master, and the other air conditioners are slaves; the control panel of the host is respectively connected with the control panel of each slave to control the operation of each slave; when the master is in standby, the control board of the master still controls the operation of each slave. That is, the master and the slave are different in that the control board of the master always controls the operation of the slave even if the master is in a standby state. That is, when the host is in standby, the control board of the host is always running, and other components of the host are in standby. Therefore, the N air conditioners are networked through physical connection lines and are controlled in a unified mode.
In this embodiment, all the air conditioners in the machine room operate in a duty-cycled manner in order to improve the reliability of the whole air conditioning system, avoid the fatigue operation of the air conditioners, and achieve the purpose of energy saving. Namely, n air conditioners are selected as a group in sequence, the air conditioners are started to run for the second set time, and the rest air conditioners are in standby.
The selection principle of n is as follows: the total refrigerating capacity of the n air conditioners is more than or equal to the total full heat load of all heating equipment in the machine room; therefore, the temperature of the machine room can be reduced, wherein N is less than or equal to N, and N is the number of all air conditioners.
For example, the air conditioning system includes 15 air conditioners, which are numbered 1#, 2#, 3#, 4#, 5#, 6#, … …, and 15#, i.e., N is 15; the total full heat load of the equipment in the room is 100KW, the refrigerating capacity of each air conditioner is 10KW, and n is 10.
Firstly, 1# to 10# are selected as a group to operate for a second set time (such as 2 hours), and the other 5 air conditioners are in standby. In operation, the following steps S1-S4 are performed.
After the second set time, 10 air conditioners are selected to operate again, namely, 11# -15 # and 1# -5 # are selected as a group to operate for the second set time, and the other 5 air conditioners are in standby. In operation, the following steps S1-S4 are performed.
After the second set time, 6# to 15# are selected as a group to operate for the second set time, and the other 5 air conditioners are in standby. In operation, the following steps S1-S4 are performed.
And so on.
The air conditioners operate according to the group wheel values, so that the reliability of the whole air conditioning system is improved, and the service life of each air conditioner is prolonged; meanwhile, stable operation of the electronic equipment in the machine room is ensured.
In this embodiment, the second set time is 1 hour to 7 hours, which not only avoids the influence of the excessive fatigue of the air conditioner on the operation efficiency and the service life caused by too long time; and energy waste (large power consumption in the starting process of the air conditioner) caused by excessively frequent starting and stopping of the air conditioner due to excessively short time is avoided. Therefore, the time range is selected, the reasonable running time of each air conditioner is guaranteed, the running efficiency and the service life of the air conditioner are guaranteed, and the purpose of energy conservation is achieved.
The method for controlling the air conditioning system of the machine room in the embodiment specifically includes the following steps, which are shown in fig. 1.
Step S0: and sequentially and circularly selecting n air conditioners to be started and operated for a second set time, and enabling the rest air conditioners to be in standby.
Step S1: and acquiring the return air temperature of each started air conditioner or/and the return air humidity of each started air conditioner every a first set time. The first set time is less than the second set time.
The return air temperature is collected by a temperature sensor arranged at the return air inlet of an indoor unit of the air conditioner.
The return air humidity is collected by a humidity sensor arranged at the return air inlet of an indoor unit of the air conditioner.
In this embodiment, first settlement time is 10 minutes, both avoided the unable humiture of gathering that the too long leads to in time to cause air conditioning system to fail in time to respond to the humiture change in the computer lab, avoided the humiture collection that the too short time leads to again too frequently to increase the air conditioner burden.
Step S2: calculating average return air temperature
Or/and, average return air humidity
Wherein, TwiReturn air temperature, Ts, for the ith air conditioneriSetting the return air humidity of the ith starting air conditioner as i ═ 1,2,3,. and n, wherein n is the number of the starting air conditioners; n is less than or equal to N.
Step S3: and controlling the operation of each start-up air conditioner according to the average return air temperature Twp and the target temperature set value Tws.
The host control board obtains the return air temperature of each air conditioner, calculates the average return air temperature and controls the operation of each air conditioner according to the average return air temperature and the target temperature set value. The entire air conditioning system has a uniform target temperature set point.
Specifically, the method comprises the following steps:
(31) when the Twp is larger than or equal to Tws + deltat, the average return air temperature is high, the whole machine room is required in the refrigerating direction, the host control board sends the requirement in the refrigerating direction to each start-up air conditioner, and each start-up air conditioner determines the specific running state according to the comparison result of the respective return air temperature and the target temperature set value Tws.
If TwiAnd the Tws + deltat is larger than or equal to Tws + deltat, which indicates that the return air temperature of the ith starting air conditioner is higher, and the ith starting air conditioner performs refrigeration operation.
If Tws-deltat < TwiIf the temperature of the return air of the ith starting air conditioner is within a reasonable range, the ith starting air conditioner supplies air to operate.
If TwiTws-deltat is not more than Tws, which indicates that the return air temperature of the ith starting air conditioner is lower, the ith starting air conditioner supplies air to operate, the air conditioner is forbidden to heat, the air conditioner and the host control board are prevented from operating in a different mode according to the refrigeration direction requirement, and energy waste is avoided.
When Twp is more than or equal to Tws + deltat, the average return air temperature is higher, the whole machine room is required in the refrigerating direction, namely the large running direction of the air-conditioning system is refrigerating running; each starting air conditioner can perform refrigeration operation or air supply operation according to the respective return air temperature, but cannot perform heating operation, so that energy waste caused by different-mode operation is avoided.
In this embodiment, the cooling and heating modes are different modes, the dehumidification and humidification modes are different modes, and the air supply mode and the cooling/heating/dehumidification/humidification mode are not different modes.
(32) When the Tws-deltat is more than Twp and less than Tws + deltat, the average return air temperature is reasonable, the whole machine room is required by the air supply direction, the host control board sends the air supply direction requirement to each start-up air conditioner, and each start-up air conditioner determines the specific operation state according to the comparison result of the respective return air temperature and the target temperature set value Tws.
If TwiAnd the Tws + deltat is larger than or equal to Tws + deltat, which indicates that the return air temperature of the ith starting air conditioner is higher, and the ith starting air conditioner performs refrigeration operation.
If Tws-deltat < TwiIf the temperature of the return air of the ith starting air conditioner is within a reasonable range, the ith starting air conditioner supplies air to operate.
If TwiAnd (4) Tws-deltat is not more than Tws-deltat, which indicates that the return air temperature of the ith starting air conditioner is lower, and the ith starting air conditioner performs heating operation.
When Tws-deltat is more than Twp and more than Tws + deltat, the average return air temperature is reasonable, the whole machine room is required by the air supply direction, namely the large running direction of the air conditioning system is the air supply running; each starting air conditioner can perform refrigeration operation, heating operation or air supply operation according to the respective return air temperature, and different modes of operation do not exist.
(33) When the Twp is less than or equal to Tws-deltat, the average return air temperature is low, the whole machine room is required in the heating direction, the host control board issues the required heating direction to each start-up air conditioner, and each start-up air conditioner determines the specific operation state according to the comparison result of the respective return air temperature and the target temperature set value Tws.
If TwiThe temperature of return air of the ith starting air conditioner is higher than Tws + deltat, the ith starting air conditioner supplies air to run, the air conditioner is forbidden to run in a cooling mode, the air conditioner and a host control board are prevented from running in a heating direction different mode, and energy waste is avoided.
If Tws-deltat < TwiIf the temperature of the return air of the ith starting air conditioner is within a reasonable range, the ith starting air conditioner supplies air to operate.
If TwiAnd (4) Tws-deltat is not more than Tws-deltat, which indicates that the return air temperature of the ith starting air conditioner is lower, and the ith starting air conditioner performs heating operation.
When the Twp is less than or equal to Tws-deltat, the average return air temperature is lower, the whole machine room is in the heating direction requirement, namely the large running direction of the air-conditioning system is in heating running; each starting air conditioner can perform heating operation or air supply operation according to the respective return air temperature, but cannot perform cooling operation, so that energy waste caused by different-mode operation is avoided.
δ t is a temperature control precision value. In the embodiment, the value range of δ t is 1-5, so that the problem that the air conditioner is insensitive to the refrigerating/heating requirement due to overlarge value and cannot meet the refrigerating/heating requirement of a machine room in time is avoided; and the problem that the service life of the air conditioner is influenced by frequent switching of the operation mode due to the fact that the air conditioner is too sensitive to the refrigerating/heating requirement due to too small value is avoided. In the value range, the air conditioner can flexibly respond to the refrigerating/heating requirements of the machine room, and the normal operation of the air conditioner is ensured. The specific value of δ t can be adjusted according to actual requirements.
The control method of the machine room air conditioning system of the embodiment comprises the steps of obtaining the return air temperature of each started air conditioner every other first set time, calculating the average return air temperature, and comparing the average return air temperature with a target temperature set value to determine the overall running direction of the air conditioning system; then each starting air conditioner compares the respective return air temperature with the average return air temperature, determines the specific operation state, eliminates local hot spots in the machine room and achieves the temperature balance in the machine room; if the whole operation direction of the air-conditioning system is air supply operation, the air conditioner can be started to perform refrigeration, heating or air supply operation; if the whole operation direction of the air-conditioning system is refrigeration operation, the air conditioner can be started for refrigeration operation or air supply operation, and heating operation is forbidden; if the overall operation direction of the air-conditioning system is heating operation, the air conditioner can be started for heating operation or air supply operation, and the refrigerating operation is forbidden; the air conditioner and the air conditioning system are prevented from operating in a different mode in the whole operation direction, energy waste caused by operation in the different mode is avoided, the whole machine room gradually reaches a reasonable temperature range, the stability of the temperature in the machine room is kept, and a stable operation environment is provided for electronic equipment in the machine room.
Because the use strength of the electronic equipment in the machine room is different in each time period, the heat productivity of the electronic equipment in a high-strength use stage is rapidly increased in a short time, so that the temperature of the room is suddenly increased; the electronic equipment has less heat productivity in the night idle time period, and the air conditioning system still operates in the original state to cause energy waste. Aiming at the situation, in order to ensure constant temperature in the machine room and simultaneously realize high efficiency and energy saving, the control method also comprises the following steps:
(1) the difference Δ Twp between the Twp calculated this time and the average return air temperature calculated last time (calculated every first set time) is obtained.
(2) If Twp is more than or equal to Tws + deltat, and delta Twp is more than or equal to a first set temperature difference value, and the first set temperature difference value is more than 0; the average return air temperature is still increased under the requirement of the refrigeration direction, and then an air conditioner in a standby state is started to perform refrigeration operation.
If Twp is not more than Tws-deltat and delta Twp is not more than a second set temperature difference value, the second set temperature difference value is less than 0; the average return air temperature is still reduced under the requirement of the heating direction, and then an air conditioner in a standby state is added for heating operation.
If the Tws-deltat/2 is more than Twp and less than Tws + deltat/2, the average return air temperature is in a reasonable range, and all the air conditioners which are additionally opened are controlled to be in standby.
Namely, the standby air conditioner is controlled to temporarily increase the refrigeration or heating operation according to the average return air temperature and the change of the average return air temperature so as to deal with the sudden rise or the sudden drop of the heat load in the machine room; when the average return air temperature in the machine room is restored to a reasonable range, namely the condition that Tws-deltat/2 is larger than Twp and smaller than Tws + deltat/2 is met, controlling the temporarily opened air conditioner to stand by; the temperature control device has the advantages that the temperature change in the machine room can be quickly responded, the sudden rise or the sudden drop of the temperature in the machine room can be avoided, and the stability of the temperature in the machine room can be ensured.
The first set temperature difference value is 1, namely, the temperature in the machine room is determined to suddenly rise when the increment of the average return air temperature is 1; the value is selected, so that the problem that the temperature in the machine room cannot be responded to suddenly rise in time due to overlarge value and the normal operation of equipment in the machine room is influenced because the air conditioner is not started to refrigerate in time is avoided; and the problem that the service life of the air conditioner is influenced due to frequent temporary increase of the standby air conditioner for refrigeration caused by over-sensitivity to the temperature in the machine room due to over-small value is avoided.
The second set temperature difference value is-1, namely, the temperature drop in the machine room is determined when the drop value of the average return air temperature is 1; the value is selected, so that the problem that the sudden drop of the temperature in the machine room cannot be responded in time due to overlarge value is avoided, and the normal operation of equipment in the machine room is influenced because the air conditioner is not started to heat in time; and the problem that the service life of the air conditioner is influenced due to the fact that the standby air conditioner is frequently and temporarily turned on to heat because the temperature in the machine room is too sensitive due to the over-small value is avoided.
For example, 10 air conditioners are currently used in a round, and the temperature control requirement of the whole machine room can be met under normal conditions. When the workload suddenly increases in a certain server in the machine room in a peak time period, the heat productivity exceeds the conventional level, and the cooling requirements cannot be met in the cooling operation of 10 air conditioners, the cooling operation of additional standby air conditioners is needed on the basis of the 10 air conditioners, until the average return air temperature returns to the reasonable range.
For example, Twp and Δ Twp are calculated every first set time (10 minutes).
If Twp is more than or equal to Tws + deltat and delta Twp is more than or equal to 1, overlapping an air conditioner in a standby state to start refrigeration operation; after 10 minutes, if Twp is still more than or equal to Tws + deltat and delta Twp is more than or equal to 1, overlapping the second air conditioner in the standby state to start the refrigeration operation; and repeating the steps until Tws-delta t/2 is less than Twp and less than Tws + delta t/2, and controlling all the superposed air conditioners to be in a standby state.
If Twp is not more than Tws-deltat and delta Twp is not more than-1, overlapping an air conditioner in a standby state and starting heating operation; after 10 minutes, if Twp is not more than Tws-deltat and delta Twp is not more than-1, overlapping a second air conditioner in a standby state and starting heating operation; and repeating the steps until Tws-delta t/2 is less than Twp and less than Tws + delta t/2, and controlling all the superposed air conditioners to be in a standby state.
Step S4: and controlling the operation of each starting air conditioner according to the average return air humidity Tsp and the target humidity set value Tss.
The host control board obtains the return air humidity of each air conditioner, calculates the average return air humidity, and controls the operation of each air conditioner according to the average return air humidity and the target humidity set value. The entire air conditioning system has a uniform target humidity set point.
Specifically, the method comprises the following steps:
(41) when Tsp is larger than or equal to Tss + δ h, the average return air humidity is higher, the whole machine room is in the dehumidification direction requirement, the host control board issues the dehumidification direction requirement to each start-up air conditioner, and each start-up air conditioner determines the specific operation state according to the comparison result of the respective return air humidity and the target humidity set value Tss.
If TsiAnd Tss + delta h is larger than or equal to, which indicates that the return air humidity of the ith starting air conditioner is higher, and the ith starting air conditioner performs dehumidification operation.
If Tss-delta h is less than TsiIf Tss + delta h indicates that the return air humidity of the ith starting air conditioner is in a reasonable range, the ith starting air conditioner supplies air to operate.
If TsiTss-delta h is not more than, which indicates that the return air humidity of the ith starting air conditioner is lower, the ith starting air conditioner supplies air to operate, the air conditioner is forbidden to humidify and operate, the air conditioner and the host control board are prevented from operating in a different mode according to the dehumidifying direction requirement, and energy waste is avoided.
When Tsp is more than or equal to Tss + δ h, the average return air humidity is higher, the whole machine room is in the dehumidification direction requirement, namely the large running direction of the air conditioning system is in dehumidification running; each starting air conditioner can perform dehumidification operation or air supply operation according to the respective return air humidity, but cannot perform humidification operation, so that energy waste caused by different-mode operation is avoided.
(42) When the Tss-delta h is larger than the Tsp and smaller than the Tss + delta h, the average return air humidity is reasonable, the whole machine room is required in the air supply direction, the main machine control board sends the air supply direction requirement to each starting air conditioner, and each starting air conditioner determines the specific operation state according to the comparison result of the respective return air humidity and the target humidity set value Tss.
If TsiAnd Tss + delta h is larger than or equal to, which indicates that the return air humidity of the ith starting air conditioner is higher, and the ith starting air conditioner performs dehumidification operation.
If Tss-delta h is less than TsiIf Tss + delta h indicates that the return air humidity of the ith starting air conditioner is in a reasonable range, the ith starting air conditioner supplies air to operate.
If TsiAnd (4) not more than Tss-delta h, which indicates that the return air humidity of the ith starting air conditioner is lower, and the ith starting air conditioner is humidified to operate.
When Tss-delta h is larger than Tsp and smaller than Tss + delta h, the average return air humidity is reasonable, the whole machine room is required in the air supply direction, namely the large operation direction of the air conditioning system is air supply operation; each starting air conditioner can perform dehumidification operation, humidification operation or air supply operation according to the respective return air humidity, and different modes of operation do not exist.
(43) When Tsp is less than or equal to Tss- δ h, the average return air humidity is low, the whole machine room is in the humidification direction requirement, the host control board issues the humidification direction requirement to each start-up air conditioner, and each start-up air conditioner determines the specific operation state according to the comparison result of the respective return air humidity and the target humidity set value Tss.
If TsiTss + delta h is larger than or equal to, which means that the return air humidity of the ith starting air conditioner is higher, the ith starting air conditioner supplies air to operate, the air conditioner is forbidden to perform dehumidification operation, the air conditioner and a host control board are prevented from performing different mode operation according to the humidification direction requirement issued, and energy waste is avoided.
If Tss-delta h is less than TsiIf Tss + delta h indicates that the return air humidity of the ith starting air conditioner is in a reasonable range, the ith starting air conditioner supplies air to operate.
If TsiAnd (4) not more than Tss-delta h, which indicates that the return air humidity of the ith starting air conditioner is lower, and the ith starting air conditioner is humidified to operate.
When Tsp is less than or equal to Tss- δ h, the average return air humidity is lower, the whole machine room is in the humidification direction, namely the large operation direction of the air-conditioning system is humidification operation; each starting air conditioner can perform humidification operation or air supply operation according to the respective return air humidity, but cannot perform dehumidification operation, so that energy waste caused by different-mode operation is avoided.
δ h is the humidity control accuracy value. In the embodiment, the value range of δ h is 1-10, so that the condition that the air conditioner is insensitive to the dehumidification/humidification requirement due to overlarge value and cannot meet the dehumidification/humidification requirement of a machine room in time is avoided; and the problem that the service life of the air conditioner is influenced by frequent switching of the operation mode due to the fact that the air conditioner is too sensitive to dehumidification/humidification requirements due to too small value is avoided. In the value range, the air conditioner can flexibly respond to the dehumidification/humidification requirements of the machine room, and the normal operation of the air conditioner is ensured. The specific value of delta h can be adjusted according to actual requirements.
In the control method of the machine room air conditioning system, the return air humidity of each started air conditioner is obtained every first set time, the average return air humidity is calculated, and then the average return air humidity is compared with a target humidity set value to determine the overall running direction of the air conditioning system; then each air conditioner is started to compare the respective return air humidity with the average return air humidity, the specific operation state is determined, local hot spots in the machine room are eliminated, and the humidity balance in the machine room is achieved; if the whole operation direction of the air conditioning system is air supply operation, the air conditioner can be started to perform dehumidification, humidification or air supply operation; if the whole operation direction of the air conditioning system is dehumidification operation, the air conditioner can be started to perform dehumidification operation or air supply operation, and the humidification operation is forbidden; if the whole operation direction of the air-conditioning system is humidification operation, the air conditioner can be started for humidification operation or air supply operation, and dehumidification operation is forbidden; the air conditioner and the air conditioning system are prevented from operating in a different mode in the whole operation direction, energy waste caused by operation in the different mode is avoided, the whole machine room gradually reaches a reasonable humidity range, the stability of the humidity in the machine room is kept, and a stable operation environment is provided for electronic equipment in the machine room.
Because the electronic equipment has high strength service phase and idle stage in the computer lab, cause the humidity in the computer lab to have the condition of sudden rise and sudden drop, if air conditioning system still operates with the original condition, cause the energy waste easily, and can't keep the interior constant humidity of computer lab. Aiming at the situation, in order to ensure constant humidity in the machine room and simultaneously realize high efficiency and energy saving, the control method also comprises the following steps:
(1) the difference value Δ Tsp between the Tsp calculated this time and the average return air humidity calculated last time (calculated every first set time) is obtained.
(2) If Tsp is more than or equal to Tss + δ h, and Δ Tsp is more than or equal to a first set humidity difference value, the first set humidity difference value is more than 0; and if the average return air humidity is still increased under the requirement of the dehumidification direction, the air conditioner in the standby state is started to perform dehumidification operation.
If Tsp is less than or equal to Tss- δ h, and Δ Tsp is less than or equal to a second set humidity difference value, the second set humidity difference value is less than 0; the average return air humidity is still reduced under the requirement of the humidifying direction, and then an air conditioner in a standby state is added for humidifying operation.
If the Tss-delta h/2 is less than the Tsp and less than the Tss + delta h/2, the average return air humidity is in a reasonable range, and all the air conditioners which are additionally opened are controlled to be in standby.
Namely, according to the average return air humidity and the change of the average return air humidity, the standby air conditioner is controlled to temporarily increase the dehumidification or humidification operation so as to deal with the sudden rise or sudden drop of the humidity in the machine room; when the average return air humidity in the machine room is restored to a reasonable range, namely the conditions that Tss-delta h/2 is larger than Tsp and is smaller than Tss + delta h/2 are met, controlling the temporarily opened air conditioner to stand by; the humidity change in the machine room can be quickly responded, sudden rise or sudden fall of the humidity in the machine room can be avoided, and the stability of the humidity in the machine room can be guaranteed.
The first set humidity difference value is 2, namely, when the increment of the average return air humidity is 2, the sudden rise of the humidity in the machine room is determined; the value is selected, so that the problem that the sudden rise of the humidity in the machine room cannot be responded in time due to overlarge value is avoided, and the normal operation of equipment in the machine room is influenced because the air conditioner is not started to dehumidify in time; and the problem that the service life of the air conditioner is influenced due to frequent temporary dehumidification of the standby air conditioner caused by over-sensitivity to the humidity in the machine room due to over-small values is avoided.
The second set humidity difference value is-2, namely, the sudden humidity drop in the machine room is determined when the drop value of the average return air humidity is 2; the value is selected, so that the problem that the sudden drop of the humidity in the machine room cannot be responded in time due to overlarge value is avoided, and the normal operation of equipment in the machine room is influenced because the air conditioner is not increased for humidification in time; and the problem that the service life of the air conditioner is influenced due to frequent temporary humidification of the standby air conditioner caused by over-sensitivity to the humidity in the machine room due to over-small values is avoided.
For example, 10 air conditioners are currently used in a round, and the humidity control requirement of the whole machine room can be met under normal conditions. When the workload suddenly increases in a certain server in the machine room in a peak time period, the humidity exceeds the conventional level, and the dehumidification requirements cannot be met in the dehumidification operation of 10 air conditioners, the additional standby air conditioners need to perform the dehumidification operation on one air conditioner on the basis of the 10 air conditioners until the average return air humidity returns to the reasonable range.
For example, Tsp, Δ Tsp are calculated every first set time (10 minutes).
If Tsp is more than or equal to Tss + δ h and Δ Tsp is more than or equal to 2, overlapping an air conditioner in a standby state to start dehumidifying operation; after 10 minutes, if the Tsp is still more than or equal to Tss + delta h and the delta Tsp is more than or equal to 2, overlapping the second air conditioner in the standby state, and starting dehumidification operation; and repeating the steps until Tss-delta h/2 is less than Tsp and less than Tss + delta h/2, and controlling all the superposed air conditioners to be converted into a standby state.
If Tsp is less than or equal to Tss- δ h and Δ Tsp is less than or equal to-2, overlapping an air conditioner in a standby state, and starting humidification operation; after 10 minutes, if the Tsp is less than or equal to Tss-delta h and the delta Tsp is less than or equal to-2, overlapping a second air conditioner in a standby state, and starting humidification operation; and repeating the steps until Tss-delta h/2 is less than Tsp and less than Tss + delta h/2, and controlling all the superposed air conditioners to be converted into a standby state.
Therefore, in the control method of the air conditioning system of the machine room in the embodiment, the return air temperature or/and the return air humidity of each started air conditioner is obtained every first set time; calculating the average return air temperature or/and the average return air humidity; controlling the operation of each starting air conditioner according to the average return air temperature and the target temperature set value, or/and controlling the operation of each starting air conditioner according to the average return air humidity and the target humidity set value; therefore, the problem of local hot spots in the machine room is solved, the stability of the temperature or/and the humidity in the machine room is kept, and a stable operation environment is provided for the electronic equipment in the machine room; and simultaneously, the purpose of energy conservation is achieved.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (9)
1. A control method of a machine room air conditioning system comprises N air conditioners, wherein each air conditioner comprises an indoor unit and an outdoor unit; the method is characterized in that: the control method comprises the following steps:
(1) acquiring the return air temperature of each started air conditioner or/and the return air humidity of each started air conditioner every other first set time;
(2) calculating average return air temperature
Or/and, average return air humidity
Wherein, TwiReturn air temperature, Ts, for the ith air conditioneriSetting the return air humidity of the ith starting air conditioner as i ═ 1,2,3,. and n, wherein n is the number of the starting air conditioners; n is less than or equal to N;
(3) controlling the operation of each start-up air conditioner according to the average return air temperature Twp and the target temperature set value Tws:
(31) when Twp is more than or equal to Tws + deltat:
if TwiIf the Tws + deltat is more than or equal to Tws, the ith starting air conditioner performs refrigeration operation;
if Tws-deltat < TwiIf the Tws + deltat is less than the Tws, the ith starting air conditioner performs air supply operation;
if TwiIf the Tws-deltat is less than or equal to Tws, the ith starting air conditioner supplies air to operate;
(32) when Tws- δ t < Twp < Tws + δ t:
if TwiIf the Tws + deltat is more than or equal to Tws, the ith starting air conditioner performs refrigeration operation;
if Tws-deltat < TwiIf the Tws + deltat is less than the Tws, the ith starting air conditioner performs air supply operation;
if TwiIf the Tws-deltat is less than or equal to Tws, the ith starting air conditioner performs heating operation;
(33) when Twp is not more than Tws- δ t:
if TwiIf the Tws + deltat is more than or equal to Tws, the ith starting air conditioner performs air supply operation;
if Tws-deltat < TwiIf the Tws + deltat is less than the Tws, the ith starting air conditioner performs air supply operation;
if TwiIf the Tws-deltat is less than or equal to Tws, the ith starting air conditioner performs heating operation;
wherein, δ t is a temperature control precision value;
and/or, (4) controlling the operation of each starting air conditioner according to the average return air humidity Tsp and the target humidity set value Tss:
(41) when Tsp is more than or equal to Tss + delta h:
if TsiIf the Tss + delta h is more than or equal to Tss, the ith starting air conditioner performs dehumidification operation;
if Tss-delta h is less than TsiIf the Tss + delta h is less than the Tss, the ith starting air conditioner supplies air to operate;
if TsiIf the Tss-delta h is less than or equal to, the ith starting air conditioner supplies air to operate;
(42) when Tss- δ h < Tsp < Tss + δ h:
if TsiIf the Tss + delta h is more than or equal to Tss, the ith starting air conditioner performs dehumidification operation;
if Tss-delta h is less than TsiIf the Tss + delta h is less than the Tss, the ith starting air conditioner supplies air to operate;
if TsiIf the Tss-delta h is less than or equal to, the ith starting air conditioner is humidified and operated;
(43) when Tsp is less than or equal to Tss- δ h:
if TsiIf the Tss + delta h is more than or equal to Tss, the ith starting air conditioner supplies air to operate;
if Tss-delta h is less than TsiIf the Tss + delta h is less than the Tss, the ith starting air conditioner supplies air to operate;
if TsiIf the Tss-delta h is less than or equal to, the ith starting air conditioner is humidified and operated;
wherein δ h is a humidity control accuracy value.
2. The control method according to claim 1, characterized in that: before the step (1), the control method further includes:
sequentially and circularly selecting n air conditioners to be started and run for a second set time, and enabling the rest air conditioners to be in standby, wherein the total refrigerating capacity of the n air conditioners is more than or equal to the total full heat load of all heating equipment in the machine room;
wherein N is less than or equal to N, and N is the number of all air conditioners; the second set time is greater than the first set time.
3. The control method according to claim 1, characterized in that: the control method further comprises the following steps:
obtaining the difference value delta Twp between the calculated Twp and the average return air temperature calculated last time;
if Twp is more than or equal to Tws + deltat and delta Twp is more than or equal to a first set temperature difference value, starting an air conditioner in a standby state for refrigerating operation; wherein the first set temperature difference value is greater than 0;
if Twp is not more than Tws-deltat and the delta Twp is not more than a second set temperature difference value, the air conditioner in the standby state is increased for heating operation; wherein the second set temperature difference value is less than 0;
if Tws-deltat/2 < Twp < Tws + deltat/2, controlling all the air conditioners which are additionally opened to stand by.
4. The control method according to claim 1, characterized in that: the control method further comprises the following steps:
acquiring a difference value delta Tsp between the Tsp calculated this time and the average return air humidity calculated last time;
if Tsp is more than or equal to Tss + δ h and Δ Tsp is more than or equal to a first set humidity difference value, starting an air conditioner in a standby state for dehumidification operation; wherein the first set humidity difference value is greater than 0;
if Tsp is less than or equal to Tss- δ h and Δ Tsp is less than or equal to a second set humidity difference value, starting an air conditioner in a standby state for humidifying operation; wherein the second set humidity difference value is less than 0;
and if the Tss-delta h/2 is less than the Tsp and less than the Tss + delta h/2, controlling all the additionally opened air conditioners to stand by.
5. The control method according to claim 1, characterized in that: the value range of delta t is 1-5.
6. The control method according to claim 1, characterized in that: the value range of delta h is 1-10.
7. The control method according to claim 3, characterized in that: the first set temperature difference value is 1 and the second set temperature difference value is-1.
8. The control method according to claim 4, characterized in that: the first set point differential wet value is 2 and the second set point differential wet value is-2.
9. The control method according to any one of claims 1 to 8, characterized in that: the control method further comprises the following steps:
optionally selecting one air conditioner as a host machine, and the other air conditioners as slave machines; the control panel of the host is respectively connected with the control panel of each slave to control the operation of each slave; when the master is in standby, the control board of the master still controls the operation of each slave.
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| CN110857806B (en) * | 2018-08-24 | 2022-07-22 | 广东松下环境系统有限公司 | Control method of air supply device and air supply device using same |
| CN109751730A (en) * | 2018-12-19 | 2019-05-14 | 广东美的暖通设备有限公司 | Control method, system, air conditioner and the storage medium of air conditioner |
| CN113552912A (en) * | 2021-08-12 | 2021-10-26 | 上海泰礼实业有限公司 | Temperature adjusting method for thermal engineering laboratory |
| CN114216220B (en) * | 2021-12-16 | 2023-02-17 | 珠海格力电器股份有限公司 | Dehumidification control method of air conditioner and air conditioner |
| CN114353283B (en) * | 2021-12-29 | 2023-09-26 | 青岛海尔空调电子有限公司 | Control method of machine room air conditioning system and machine room air conditioning system |
| CN114279072B (en) * | 2021-12-30 | 2023-11-21 | 北京世纪互联宽带数据中心有限公司 | Operation control method and device, electronic equipment and storage medium |
| CN114251779B (en) * | 2021-12-31 | 2023-06-30 | 南京楷德悠云数据有限公司 | Group control method for power grid impact prevention precision air conditioner of data center |
| CN115111821B (en) * | 2022-06-29 | 2023-03-17 | 恒华数字科技集团有限公司 | Control method of data center air conditioning system |
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Effective date of registration: 20201110 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee after: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. Patentee after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. |