Group control method and system for multi-group machine room air conditioner group

Abstract

The invention discloses a group control method and system for a multi-group machine room air conditioner group. The multi-group machine room air conditioner group comprises at least one room-level air conditioner group and at least one inter-column air conditioner group. Air supply temperature data collected by the inter-column air conditioner group, return air temperature data collected by the room-level air conditioner group and cold channel temperature and humidity values collected by a cold channel temperature and humidity sensor are obtained; the group control configuration mode of the multi-group machine room air conditioner group is determined according to one or more of the air supply temperature data, the air return temperature data and the cold channel temperature and humidity value; the group control configuration mode comprises an operation control parameter and an operation control mode; and the inter-column air conditioner group and / or the room-level air conditioner group are / is controlled to execute the group control configuration mode. According to the method, the corresponding group control configuration mode is determined according to the detected current environment state, so that high-energy-consumption events are avoided, the operation safety of the multi-group machine room air conditioner group is improved, the energy consumption is reduced, and the efficiency of the air conditioner is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning control, and in particular to a group control method and system for multi-group computer room air conditioning groups. Background Art

[0002] At present, there are multiple groups of air conditioning equipment in large data center rooms for cooling and heat dissipation. That is, a data center room has not only room-level air conditioning groups, but also inter-row air conditioning groups, and the cooling capacity between room-level air conditioning and inter-row air conditioning groups is cross-used. In such a situation, operation conflicts are prone to occur, which not only leads to abnormal situations, but also causes high energy consumption in the entire central computer room.

[0003] Therefore, the prior art needs to be further improved. Summary of the invention

[0004] The purpose of the present invention is to provide a group control method for a multi-group computer room air conditioning group, so as to overcome the defect in the prior art that when the room-level air conditioning group and the row-to-row air conditioning group are used to control the same data center computer room, the cooling capacity between the groups is cross-used, which not only has the hidden danger of abnormal operation, but also leads to high energy consumption in the computer room.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0006] In a first aspect, the present application discloses a group control method for a multi-group computer room air conditioner group, wherein the multi-group computer room air conditioner group includes: at least one inter-row air conditioner group module and at least one room-level air conditioner group; the inter-row air conditioner group module includes multiple inter-row air conditioner groups, and the inter-row air conditioner group and the room-level air conditioner group each include multiple air conditioner units; the inter-row air conditioner group module is correspondingly provided with a cold channel temperature and humidity sensor;

[0007] The group control method comprises:

[0008] Acquire the supply air temperature data collected by the inter-row air conditioning group, the return air temperature data collected by the room-level air conditioning group, and the cold aisle temperature and humidity values ​​collected by the cold aisle temperature and humidity sensor;

[0009] Determine the group control configuration mode of the multi-group computer room air conditioning group according to one or more of the supply air temperature data, the return air temperature data and the cold channel temperature and humidity values; the group control configuration mode includes: the operation control parameters and operation control mode of each air conditioning unit;

[0010] The inter-row air conditioning group and / or the room-level air conditioning group are controlled to execute the group control configuration mode.

[0011] Optionally, the step of determining the group control configuration mode corresponding to the air-conditioning group unit according to the air supply temperature data and the cold channel temperature and humidity values ​​includes:

[0012] Determine the operation mode corresponding to the total demand according to the average temperature value of the temperature and humidity of the cold channel, and calculate the operation mode corresponding to each air-conditioning unit in the inter-row air-conditioning group according to the supply air temperature;

[0013] Determine whether the air conditioning operation mode corresponding to the total demand and the air conditioning operation mode corresponding to each air conditioning unit in the inter-row air conditioning group are opposite;

[0014] If the opposite is true, the group control configuration mode corresponding to the multi-group computer room air conditioning group is determined to be an anti-competition operation mode; the anti-competition operation mode is to control each air-conditioning unit in the inter-row air-conditioning group to adjust the temperature and humidity in an operation mode that is compatible with the operation mode corresponding to the total demand.

[0015] Optionally, the operation modes include: cooling, heating, air supply, standby and dehumidification;

[0016] The step of controlling each air-conditioning unit in the inter-row air-conditioning group to adjust the temperature and humidity in an operating mode adapted to the operating mode corresponding to the total demand includes:

[0017] If the operation mode corresponding to the total demand is cooling, and the operation mode corresponding to each air-conditioning unit in the inter-row air-conditioning group is heating, then each air-conditioning unit whose operation mode is heating is controlled to execute the operation mode of air supply or shutdown;

[0018] If the operation mode corresponding to the total demand is humidification, and the operation mode corresponding to each air-conditioning unit in the inter-row air-conditioning group is dehumidification, then each air-conditioning unit whose corresponding operation mode is dehumidification is controlled to execute the standby or shutdown air-conditioning operation mode.

[0019] Optionally, the step of determining the group control configuration mode corresponding to the air conditioning group unit according to the return air temperature data includes:

[0020] The average temperature value of the total demand is calculated based on the return air temperature data of the room-level air conditioning group;

[0021] Determine the operation mode corresponding to the total demand according to the average temperature value of the total demand, and determine the operation mode corresponding to the room-level air conditioning group itself according to the return air temperature data;

[0022] Determine whether the operation mode corresponding to the total demand is opposite to the operation mode corresponding to each air-conditioning unit in the room-level air-conditioning group;

[0023] If the opposite is true, the group control configuration mode corresponding to the multi-group computer room air conditioning group is determined to be an anti-competition operation mode; the anti-competition operation mode is to control each air-conditioning unit in the room-level air-conditioning group to adjust the temperature and humidity in an operation mode that is compatible with the operation mode corresponding to the total demand.

[0024] Optionally, the step of determining the group control configuration mode of the multi-group computer room air conditioner group according to one or more of the supply air temperature data, the return air temperature data and the cold channel temperature and humidity values ​​further includes:

[0025] Calculate the difference between the temperature and humidity values ​​of the cold channel and the refrigeration set temperature, and based on whether the difference exceeds a preset threshold, determine that the group control configuration mode of the multi-group computer room air-conditioning group is a local hotspot elimination mode; wherein, the group control configuration mode of the local hotspot elimination mode includes: increasing the number of standby units in the inter-row air-conditioning group entering the auxiliary cooling state, or reducing the number of air-conditioning units in the inter-row air-conditioning group entering the auxiliary cooling state.

[0026] Optionally, in the local hotspot elimination method, the specific control steps of increasing the number of standby units in the inter-row air-conditioning group entering the auxiliary cooling state, or reducing the number of air-conditioning units in the inter-row air-conditioning group entering the auxiliary cooling state, include:

[0027] Determine whether the difference between the cold aisle temperature value detected by any cold aisle temperature and humidity sensor and the refrigeration set temperature is higher than a preset temperature threshold;

[0028] If the difference between the cold channel temperature value and the cooling set temperature is higher than the preset temperature threshold, the control increases the number of standby units in the current inter-row air conditioning group that perform auxiliary cooling, otherwise the control reduces the number of air conditioning units in the current inter-row air conditioning group that perform auxiliary cooling;

[0029] If all the standby units in the current inter-row air conditioning group have been started to perform auxiliary cooling, and the cold channel temperature value is higher than the cooling set temperature by a preset temperature threshold, the control will start the standby units in the room-level air conditioning group to perform auxiliary cooling until the cold channel temperature value is equal to or lower than the cooling set temperature by a preset temperature threshold.

[0030] Optionally, the step of determining the group control configuration mode of the multi-group computer room air conditioner group according to one or more of the supply air temperature data, the return air temperature data and the cold channel temperature and humidity values ​​includes:

[0031] After receiving the auxiliary cooling command issued by the monitoring host, the control makes the first standby unit with the highest return air temperature in the room-level air conditioning group enter the auxiliary cooling state;

[0032] Calculating a first difference between the return air temperature of the first standby unit and the refrigeration setting temperature of the monitoring host, and determining whether the first difference exceeds a preset difference threshold;

[0033] If exceeded, the group control configuration mode of the multi-group computer room air conditioner group is determined to be a local hotspot elimination mode; wherein the group control configuration mode of the local hotspot elimination mode includes: selecting the second standby unit with the highest return air temperature in the current room-level air conditioner group, and controlling the second standby unit to enter the auxiliary cooling state;

[0034] Calculating a second difference between the return air temperature of the second standby unit and the refrigeration setting temperature of the monitoring host, and determining whether the second difference exceeds a preset difference threshold;

[0035] If it exceeds, the second standby unit with the highest return air temperature in the current room-level air conditioning group is selected, and the second standby unit is controlled to enter the auxiliary cooling state;

[0036] Calculating a third difference between the return air temperature of the second standby unit and the refrigeration setting temperature of the monitoring host, and determining whether the third difference exceeds a preset threshold;

[0037] If it exceeds, repeatedly screen out the Kth standby unit with the highest return air temperature in the current room-level air-conditioning group, control the Kth standby unit to enter the auxiliary cooling state, and calculate the Kth difference until the kth difference does not exceed the preset threshold.

[0038] Optionally, the step of determining the group control configuration mode of the multi-group computer room air conditioner group according to one or more of the supply air temperature data, the return air temperature data and the cold channel temperature and humidity values ​​includes:

[0039] When it is detected that the air conditioning operation mode corresponding to the total demand is the same as the air conditioning operation mode corresponding to each air conditioning unit in the inter-row air conditioning group, the difference between the cold channel temperature value and the cooling setting temperature is lower than the preset temperature threshold, and the first difference between the return air temperature of the first standby unit in the room-level air conditioning group and the cooling setting temperature of the monitoring host does not exceed the preset difference threshold, it is determined that the group control configuration mode of the multi-group computer room air conditioning group is a balanced operation mode;

[0040] Wherein, the balanced operation mode is:

[0041] In the preset first balancing operation cycle, the air conditioner unit with the longest cooling start time in the room-level air conditioner group is selected, and the second air conditioner unit with the shortest operation time in the room-level air conditioner group or the row-to-row air conditioner group is selected based on the balance of the first air conditioner unit;

[0042] Every preset balancing cycle, the third air-conditioning unit with the shortest running time in the room-level air-conditioning group is screened out, and the third air-conditioning unit is switched from standby to cooling operation state, and the fourth air-conditioning unit currently in cooling operation is switched to standby state until the balancing control time ends.

[0043] Optionally, after the step of determining the group control configuration mode of the multi-group computer room air conditioner group according to one or more of the supply air temperature data, the return air temperature data and the cold channel temperature and humidity values, the step further includes:

[0044] Determine whether there is a faulty air conditioner unit in the room-level air conditioner group or the row-level air conditioner group. If so, determine that the group control configuration mode of the multi-group computer room air conditioner group is the fault switching mode;

[0045] The fault switching mode is: controlling the faulty air conditioning unit to switch to a standby state, and at the same time controlling the standby unit with the highest return air temperature in the room-level air conditioning group to start operation;

[0046] And, judging whether the first-level cold source operation condition is met according to the average temperature of the cold channel temperature and humidity value, if so, determining the group control configuration mode of the multi-group computer room air conditioning group as the cold source priority mode;

[0047] The cold source priority method is: determining the cold source demand value according to the power values ​​corresponding to the row-level air conditioning group and the room-level air conditioning group, and controlling the number of air conditioning units performing cooling operation according to the calculated cold source demand value;

[0048] And, according to the obtained power values ​​corresponding to the row-level air conditioning group and the room-level air conditioning group, the group control configuration mode of the multi-group computer room air conditioning group is determined as follows: power range distinction mode;

[0049] The power range distinction method is: according to the power values ​​corresponding to the row-level air conditioning group and the room-level air conditioning group, the corresponding operation mode of each air conditioning unit is controlled.

[0050] In a second aspect, the present application discloses a group control system for a multi-group computer room air conditioning group, which includes: at least one inter-row air conditioning group module, at least one room-level air conditioning group and at least one monitoring host; the inter-row air conditioning group module includes multiple inter-row air conditioning groups, and the inter-row air conditioning group and the room-level air conditioning group each include multiple air conditioning units; the inter-row air conditioning group module is correspondingly provided with a cold channel temperature and humidity sensor;

[0051] The inter-row air conditioning group is used to collect supply air temperature data;

[0052] The room-level air conditioning group is used to collect return air temperature data;

[0053] The cold channel temperature and humidity sensor is used to collect the temperature and humidity values ​​of the cold channel;

[0054] The monitoring host is used to determine the group control configuration mode of the multi-group computer room air-conditioning group according to one or more of the supply air temperature data, the return air temperature data and the cold channel temperature and humidity values; the group control configuration mode includes: the operation control parameters and operation control mode of each air-conditioning unit; and controlling the inter-row air-conditioning group and / or the room-level air-conditioning group to execute the group control configuration mode.

[0055] Beneficial effects:

[0056] The present embodiment discloses a group control method and system for a multi-group computer room air conditioning group, the multi-group computer room air conditioning group includes: at least one room-level air conditioning group and at least one inter-row air conditioning group; obtaining the supply air temperature data collected by the inter-row air conditioning group, the return air temperature data collected by the room-level air conditioning group, and the cold channel temperature and humidity values ​​collected by the cold channel temperature and humidity sensor; determining the group control configuration mode of the multi-group computer room air conditioning group according to one or more of the supply air temperature data, the return air temperature data, and the cold channel temperature and humidity values; the group control configuration mode includes: operation control parameters and operation control mode; controlling the inter-row air conditioning group and / or the room-level air conditioning group to execute the group control configuration mode. The method of the present invention determines the corresponding group control configuration mode according to the detected current environmental state to avoid the occurrence of high-energy-consuming events, which not only improves the operating safety of the multi-group computer room air conditioning group, but also reduces energy consumption and improves the efficiency of air conditioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a schematic diagram of the principle structure of a multi-group computer room air conditioning group according to an embodiment of the present invention;

[0058] Figure 2 The present invention is a flowchart of a group control method for a multi-group computer room air conditioner group according to an embodiment of the present invention. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0060] The air conditioning system of a data center or computer room can be configured in two different ways: room-level air conditioning group and row-to-row air conditioning group. Room-level air conditioning group usually refers to an air conditioning system that provides cooling for the entire room or computer room. The system includes multiple air conditioning units, each of which is responsible for the cooling needs of a part of the room. The design of the room and air conditioning group is to ensure that the temperature and humidity of the entire room are kept within a suitable range to meet the operating requirements of the equipment. The row-to-row air conditioning group refers to an air conditioning system set up inside the computer room according to the rows in which the equipment is arranged. This configuration method usually accurately controls the heat load of different areas in the computer room to improve energy efficiency and cooling efficiency.

[0061] At present, large data center computer rooms usually have multiple groups of air conditioning equipment. The multiple groups of air conditioning equipment include not only room-level air conditioning groups, but also inter-row air conditioning groups. As a result, the cooling capacity output by the room-level air conditioning group and the inter-row air conditioning group is cross-used. If the cooling capacity output by the two air conditioning groups is not properly controlled, it may cause operation conflicts and lead to high energy consumption in the entire data center computer room. For example, if the cooling capacity output of the room-level air conditioner is too large, the temperature detected by the inter-row air conditioner is too low, while the heating function is turned on in the other groups, resulting in very high overall energy consumption in the entire data center computer room. The operating status of the air conditioners in each group cannot be uniformly scheduled, which is not energy-saving and prone to abnormal situations such as local hot spots.

[0062] In order to overcome the above problems, the present application provides a group control method and system for a multi-group computer room air conditioning group. By analyzing the supply air temperature data and return air temperature data collected by the room-level air conditioning group and the inter-row air conditioning group, the room-level air conditioning group and the inter-row air conditioning group are set to be individually controlled or group controlled to control the temperature and humidity in the computer room, the operating time of each unit in the air conditioning group, and fault switching, so as to avoid cooling conflicts between the two air conditioning groups and between different air conditioning units in the same air conditioning group. The method of this embodiment is based on different group control configuration methods to adjust the operating data, switch the operating mode, and control the operating time of each air conditioning unit in different scenarios, thereby avoiding the occurrence of high-energy-consuming events, improving the operating safety of the multi-group computer room air conditioning group, and at the same time reducing energy consumption and improving the efficiency of air conditioning.

[0063] The method and system disclosed in this embodiment will be further described below in conjunction with the accompanying drawings.

[0064] This embodiment discloses a group control method for multiple groups of computer room air conditioners. Figure 1As shown, the multi-group computer room air conditioning group includes: at least one inter-row air conditioning group module 30 and at least one room-level air conditioning group 20. The inter-row air conditioning group module 30 includes multiple inter-row air conditioning groups 10, and the inter-row air conditioning group 10 and the room-level air conditioning group 20 each include multiple air conditioning units; the inter-row air conditioning group module 30 is correspondingly provided with a cold channel temperature and humidity sensor 50. In order to ensure that the ambient temperature in the air conditioning cabinet in the computer room is within a reasonable range, in the specific implementation, a front door temperature sensor 40 will also be installed in the air conditioning cabinet, and the front door temperature sensor is used to monitor the temperature condition inside the air conditioning cabinet in real time.

[0065] like Figure 2 As shown, the group control method includes:

[0066] Step S1, obtaining the supply air temperature data collected by the inter-row air conditioning group, the return air temperature data collected by the room-level air conditioning group, and the cold aisle temperature and humidity values ​​collected by the cold aisle temperature and humidity sensor.

[0067] In the inter-row air conditioning system and the room-level air conditioning system, temperature sensors are usually arranged at key locations such as the air supply outlet and the return air outlet. The location of these sensors can ensure that the supply air temperature and the return air temperature can be accurately reflected. Therefore, when the inter-row air conditioning group and the room-level air conditioning group are set up in the computer room, the inter-row air conditioning group can be used to collect the supply air temperature data, and the return air temperature data collected by the room-level air conditioning group can be used.

[0068] In addition, each inter-row air conditioning group module 30 is equipped with a corresponding cold channel temperature and humidity sensor 50. The cold channel temperature and humidity sensor transmits the detected temperature and humidity values ​​to the collector FAU at regular intervals. The collector FAU takes the average temperature and humidity of the received cold channel temperature and humidity sensors of each module communicating normally as the parameter for calculating the cooling / heating and humidification / dehumidification requirements of the corresponding module.

[0069] In addition, the total power of the air conditioning group in the computer room and the total power of each air conditioning group module are obtained from the monitoring host for dynamic calculation of the total heat load. Each inter-row air conditioning group module exists as an independent group submodule (which can be identified as 1-1, 1-2, 1-3, 1-4, 1-5 respectively). There is no policy association between the inter-row air conditioning group modules; there is a policy association between the inter-row air conditioning group and the room-level air conditioning group. The group control master and slave need to be set separately on each air conditioner. There can only be one host in a network. The monitoring host is defined as the master, and the inter-row air conditioner and the room-level air conditioner are defined as slaves; the slave address starts from 1 and is defined continuously according to the number of group control air conditioners. For example, if the number of inter-row air conditioners in the 1-1 module is 8, the group submodule slave address is defined as 1, 2, 3, 4, 5, 6, 7, 8, and so on.

[0070] In specific implementation, the group control address needs to be set separately, and other group control parameters will only be effective if they are set on the monitoring host; the baud rates of all air conditioners participating in the group control must be set consistently.

[0071] Step S2, determining the group control configuration mode of the multi-group computer room air conditioning group according to one or more of the supply air temperature data, the return air temperature data and the cold channel temperature and humidity values; the group control configuration mode includes: the operation control parameters and operation control mode of each air conditioning unit.

[0072] In this step, the group control configuration mode adapted to the current scene is determined according to the supply air temperature data, return air temperature data and cold channel temperature and humidity values ​​obtained in the above step S1. Specifically, the group control configuration mode includes operation control parameters and operation control mode. The operation control parameters are: the start-up operation time of each air-conditioning unit.

[0073] Specifically, different group control configuration modes can be set for different scenarios. For example: when the total demand of the computer room is heating, and the demand of a single air-conditioning unit is cooling, it is in a scenario of avoiding competition operation, and the group control configuration mode is: anti-competition operation mode. When there is a scenario of local high temperature in the computer room, the group control configuration mode is: local hot spot elimination mode. When some air-conditioning units are continuously running, while other air-conditioning units are continuously on standby, it is in a scenario of unbalanced operating time, and the configuration mode of this scenario is a balanced operation mode. When one or more air-conditioning units are detected to have a fault, the group control configuration mode is: fault switching mode, that is, controlling the faulty air-conditioning unit to be in standby or shutdown state, and switching another air-conditioning unit in standby state to execute the operating parameters of the faulty air-conditioning unit, so as to replace the faulty air-conditioning unit to achieve normal control of temperature and humidity in the computer room.

[0074] Step S3: Control the inter-row air conditioning group and / or the room-level air conditioning group to execute the group control configuration method.

[0075] After the current scene is determined according to the supply air temperature data, return air temperature data and cold channel temperature and humidity values ​​in the above steps, the corresponding group control allocation method is determined according to the current scene to control the inter-row air conditioning group and the room-level air conditioning group according to the determined group control allocation method.

[0076] Specifically, for the scenario corresponding to the anti-competition operation mode, when the inter-row air conditioning group is controlled, the step of determining the group control configuration mode corresponding to the air conditioning group unit according to the supply air temperature data and the cold channel temperature and humidity values ​​includes:

[0077] Step S211, determining the operation mode corresponding to the total demand according to the average temperature value of the temperature and humidity of the cold channel, and calculating the operation mode corresponding to each air-conditioning unit in the inter-row air-conditioning group according to the supply air temperature.

[0078] Step S212: determine whether the air-conditioning operation mode corresponding to the total demand and the air-conditioning operation mode corresponding to each air-conditioning unit in the inter-row air-conditioning group are opposite.

[0079] Step S213: If the air-conditioning operation mode corresponding to the total demand is opposite to the air-conditioning operation mode corresponding to each air-conditioning unit in the inter-row air-conditioning group, the group control configuration mode corresponding to the multi-group computer room air-conditioning group is determined to be an anti-competition operation mode; the anti-competition operation mode is to control each air-conditioning unit in the inter-row air-conditioning group to adjust the temperature and humidity in an operation mode that is compatible with the operation mode corresponding to the total demand. The operation modes include: cooling, heating, air supply, standby and dehumidification; wherein the compatible operation mode is: non-competitive operation mode, for example: cooling and dehumidification, humidification and standby or shutdown, etc.

[0080] The step of controlling each air-conditioning unit in the inter-row air-conditioning group to adjust the temperature and humidity in an operating mode adapted to the operating mode corresponding to the total demand includes:

[0081] If the operation mode corresponding to the total demand is cooling, and the operation mode corresponding to each air-conditioning unit in the inter-row air-conditioning group is heating, then each air-conditioning unit whose operation mode is heating is controlled to execute the operation mode of air supply or shutdown;

[0082] If the operation mode corresponding to the total demand is humidification, and the operation mode corresponding to each air-conditioning unit in the inter-row air-conditioning group is dehumidification, then each air-conditioning unit whose corresponding operation mode is dehumidification is controlled to execute the standby or shutdown air-conditioning operation mode.

[0083] The cold channel temperature and humidity sensors installed in each inter-row air conditioning group module transmit the detected temperature and humidity values ​​to the collector FAU at regular intervals. The collector FAU takes the average value of the temperature and humidity received from the cold channel temperature and humidity sensors of each module that communicates normally as the parameter used to calculate the cooling / heating and humidification / dehumidification requirements of the corresponding module. If the total demand calculated by the average temperature of the cold channel is cooling, and the demand calculated by the supply air temperature detected by the inter-row air conditioner itself is heating, the corresponding inter-row air conditioner cannot be heated, and the unit only supplies air or shuts down, and vice versa. If the total demand calculated by the average relative humidity of the cold channel is humidification, and the demand calculated by the return air relative humidity detected by the inter-row air conditioner itself is dehumidification, the corresponding inter-row air conditioner cannot dehumidify, and the unit remains on standby or shuts down, and vice versa.

[0084] Furthermore, if the first cold channel temperature and humidity sensor in the inter-row air conditioning group module communicates abnormally with the monitoring host, the value of the second cold channel temperature and humidity sensor is used as the basis for calculation; if both the first cold channel temperature and humidity sensor and the second cold channel temperature and humidity sensor communicate abnormally with the monitoring host, the inter-row air conditioning supply air temperature / return air relative humidity value that works normally in the inter-row air conditioning group module is taken as the detection parameter for average demand calculation; if the inter-row air conditioning is shut down or fails, the corresponding inter-row air conditioning needs to be excluded from the calculation range and does not participate in the average value calculation. When the cold channel temperature and humidity sensor with abnormal communication resumes monitoring with the monitoring host, the demand calculation is performed again according to the detection value of the cold channel temperature and humidity sensor.

[0085] Furthermore, when the anti-competition operation mode is applied to the room-level air conditioning group, the step of determining the group control configuration mode corresponding to the air conditioning group unit according to the return air temperature data includes:

[0086] The average temperature value of the total demand is calculated based on the return air temperature data of the room-level air conditioning group;

[0087] Determine the operation mode corresponding to the total demand according to the average temperature value of the total demand, and determine the operation mode corresponding to the room-level air conditioning group itself according to the return air temperature data;

[0088] Determine whether the operation mode corresponding to the total demand is opposite to the operation mode corresponding to each air-conditioning unit in the room-level air-conditioning group;

[0089] If the opposite is true, the group control configuration mode corresponding to the multi-group computer room air conditioning group is determined to be an anti-competition operation mode; the anti-competition operation mode is to control each air-conditioning unit in the room-level air-conditioning group to adjust the temperature and humidity in an operation mode that is compatible with the operation mode corresponding to the total demand.

[0090] In one implementation, each room-level air conditioner transmits the detected return air temperature and humidity values ​​to the collector FAU at regular intervals through its own return air temperature and humidity sensor, and then the FAU takes the average value of the return air temperature and humidity received from each air conditioner with normal communication as the parameter for calculating the cooling / heating and humidification / dehumidification requirements. If the demand calculated by the average return air temperature is cooling, and the demand calculated by the return air temperature detected by the room-level air conditioner itself is heating, the corresponding room-level air conditioner cannot heat, and the unit remains in standby or shut down, and vice versa. If the demand calculated by the average return air relative humidity is humidification, and the demand calculated by the return air relative humidity detected by the room-level air conditioner itself is dehumidification, the corresponding room-level air conditioner cannot dehumidify, and the unit only supplies air or shuts down, and vice versa.

[0091] In addition, if a room-level air conditioner is turned off or fails, the corresponding room-level air conditioner needs to be excluded from the calculation range and does not participate in the average value calculation. When the fault is restored, the room-level air conditioner will re-enter the calculation range and participate in the average demand calculation.

[0092] When the air conditioning load in the computer room is unevenly distributed, there may be local hot spots or local high temperatures. For such local hot spots or local high temperatures, the local hot spot elimination method of the application environment is used.

[0093] When the local hot spot elimination method is applied to the inter-row air conditioner group for control, the step of determining the group control configuration method of the multi-group computer room air conditioner group according to one or more of the supply air temperature data, the return air temperature data and the cold channel temperature and humidity values ​​also includes:

[0094] Calculate the difference between the temperature and humidity values ​​of the cold channel and the refrigeration set temperature, and based on whether the difference exceeds a preset threshold, determine that the group control configuration mode of the multi-group computer room air-conditioning group is a local hotspot elimination mode; wherein, the group control configuration mode of the local hotspot elimination mode includes: increasing the number of standby units in the inter-row air-conditioning group entering the auxiliary cooling state, or reducing the number of air-conditioning units in the inter-row air-conditioning group entering the auxiliary cooling state.

[0095] Specifically, the specific control steps of increasing the number of standby units in the inter-row air conditioning group entering the auxiliary cooling state, or reducing the number of air conditioning units in the inter-row air conditioning group entering the auxiliary cooling state in the local hot spot elimination method include:

[0096] Determine whether the difference between the cold aisle temperature value detected by any cold aisle temperature and humidity sensor and the refrigeration set temperature is higher than a preset temperature threshold;

[0097] If the difference between the cold channel temperature value and the cooling set temperature is higher than the preset temperature threshold, the control increases the number of standby units in the current inter-row air conditioning group that perform auxiliary cooling, otherwise the control reduces the number of air conditioning units in the current inter-row air conditioning group that perform auxiliary cooling;

[0098] If all the standby units in the current inter-row air conditioning group have been started to perform auxiliary cooling, and the cold channel temperature value is higher than the cooling set temperature by a preset temperature threshold, the control will start the standby units in the room-level air conditioning group to perform auxiliary cooling until the cold channel temperature value is equal to or lower than the cooling set temperature by a preset temperature threshold.

[0099] In one implementation, when one of the cold channel temperature and humidity sensors in the module or a measurement point installed on the front door of any rack detects that the real-time temperature value T1 is higher than the cooling set temperature T 送风设定(Cooling set temperature, settable, default 18℃, used for inter-row air conditioners) If ΔT*A (A-local hot spot determination coefficient, settable, default 2) is high and lasts for more than 5 minutes, it can be considered that there are relatively more cabinets in the left and right areas of this temperature and humidity sensor or IT equipment on this rack, the heat load is large, the local cold channel temperature is high, and air conditioning is required; if there are units in standby state in the corresponding module in the inter-row air conditioner group, the standby unit with the highest air supply temperature is always enabled to participate in auxiliary cooling.

[0100] When the auxiliary cooling unit is enabled for cooling, if there is still a cold channel temperature and humidity sensor in the inter-row air conditioning group module or a temperature measurement point installed on the front door of any rack detects that the temperature value T1 is higher than the cooling set temperature T 送风设定 If ΔT*A is high and lasts for more than 5 minutes, the next standby unit with the highest air supply temperature will be turned on until all the units in standby state have been put into use.

[0101] If all the inter-row air conditioners in this inter-row air conditioner group module have entered cooling mode and 100% cooling capacity output has been enabled (the judgment condition for 100% cooling capacity output is: the fan speed in the unit reaches the upper limit speed, the DX system defines the compressor operating frequency to the upper limit frequency, the default is 100Hz; the CW system defines the chilled water valve to be opened to 100% opening), and the above situation still exists, the standby room-level air conditioner with the highest return air temperature in the room-level air conditioner group will be loaded to participate in auxiliary cooling.

[0102] The monitoring host sends the auxiliary cooling demand to the corresponding inter-row air conditioner in the same inter-row air conditioner group module. After the corresponding air conditioner receives the start-up cooling demand, it waits for the start-up delay time, and then each air conditioning unit starts and executes the corresponding demand request.

[0103] When the cold channel temperature of this module or the temperature measuring point installed on the front door of the rack returns to the normal set point range (the normal set point range is defined as: [T supply air setting - ΔT] ≤ T1 < [T supply air setting + ΔT]), the standby units originally participating in auxiliary cooling will exit the auxiliary cooling mode one by one and return to the standby state every 5 minutes in the order of the smallest cooling demand.

[0104] Further, when the local hotspot elimination method is applied to the room-level air conditioning group, the step of determining the group control configuration method of the multi-group computer room air conditioning group according to one or more of the supply air temperature data, the return air temperature data and the cold channel temperature and humidity values ​​includes:

[0105] After receiving the auxiliary cooling command issued by the monitoring host, the control makes the first standby unit with the highest return air temperature in the room-level air conditioning group enter the auxiliary cooling state;

[0106] Calculating a first difference between the return air temperature of the first standby unit and the refrigeration setting temperature of the monitoring host, and determining whether the first difference exceeds a preset difference threshold;

[0107] If exceeded, the group control configuration mode of the multi-group computer room air conditioner group is determined to be a local hotspot elimination mode; wherein the group control configuration mode of the local hotspot elimination mode includes: selecting the second standby unit with the highest return air temperature in the current room-level air conditioner group, and controlling the second standby unit to enter the auxiliary cooling state;

[0108] Calculating a second difference between the return air temperature of the second standby unit and the refrigeration setting temperature of the monitoring host, and determining whether the second difference exceeds a preset difference threshold;

[0109] If it exceeds, the second standby unit with the highest return air temperature in the current room-level air conditioning group is selected, and the second standby unit is controlled to enter the auxiliary cooling state;

[0110] Calculating a third difference between the return air temperature of the second standby unit and the refrigeration setting temperature of the monitoring host, and determining whether the third difference exceeds a preset threshold;

[0111] If it exceeds, repeatedly screen out the Kth standby unit with the highest return air temperature in the current room-level air-conditioning group, control the Kth standby unit to enter the auxiliary cooling state, and calculate the Kth difference until the kth difference does not exceed the preset threshold, where K is a positive integer.

[0112] In one implementation, when the room-level air conditioner receives the instruction from the monitoring host to start the auxiliary cooling demand, it will load the standby unit with the highest return air temperature in the room-level air conditioner group into the auxiliary cooling state. 回风 Than cooling set temperature T 回风设定 (Cooling set temperature, settable, default 30℃, used for room-level air conditioners) High ΔT*A (A-local hot spot coefficient, settable, default 2), it can be considered that this unit faces relatively more IT equipment in the module row cabinet, the heat load is large, and air conditioning equipment needs to be loaded; the host will issue an auxiliary cooling command to load the standby unit with the highest return air temperature in the room-level air conditioning group into the auxiliary cooling state. (The room-level air conditioning return air temperature sensor is installed in the return air outlet area of ​​the room-level air conditioner, which is used to collect the return air temperature of the air conditioner and to execute the corresponding relevant strategies of the controller). The host sends the auxiliary cooling demand to the corresponding room-level air conditioner in the same group in the standby state. After the corresponding air conditioner receives the start-up cooling demand, it waits for the start-up delay time, and then the unit starts and executes the corresponding demand request. When this room-level air conditioner returns to the normal cooling temperature set point range (normal set point range definition: [T 回风设定 -ΔT]≤T1<[T回风设定 +ΔT]), the standby units originally involved in auxiliary cooling will resume standby status one by one every 5 minutes in the order of the smallest cooling demand.

[0113] Furthermore, if the load of each air-conditioning unit in the current air-conditioning group in the computer room is relatively uniform, and there is no local hot spot or local high temperature, in order to achieve further energy saving, the group control configuration mode set in the current application scenario is the balanced operation mode. The balanced operation mode is: control the operation time of each air-conditioning host to maintain balance, and avoid one or more air-conditioning units being in long-term operation mode.

[0114] The monitoring host needs to support setting the number of units to be switched during the balancing time (default is 1, which can be set), as well as the balancing switching time (the cycle can be defined as hours, days, weeks, or months, the value can be set, and the default is 7 days). Starting from the activation of the balancing operation mode, during the first balancing operation cycle, the monitoring host will define that all air-conditioning units do not execute the balancing switching mechanism. The monitoring host will count the operating time of the operating components such as the fan, two-way water valve or compressor as a reference for judgment (the data after the first balancing operation cycle statistics will be used as a reference for load layout), that is, the unit with the longest refrigeration activation time has the longest operating time of the fan and two-way water valve or compressor, and this unit is defined as the first balancing slave.

[0115] Specifically, in an application scenario where a balanced operation mode is implemented in an inter-row air conditioning group module, the step of determining the group control configuration mode of the multi-group computer room air conditioning group according to one or more of the supply air temperature data, the return air temperature data, and the cold channel temperature and humidity values ​​includes:

[0116] When it is detected that the air conditioning operation mode corresponding to the total demand is the same as the air conditioning operation mode corresponding to each air conditioning unit in the inter-row air conditioning group, the difference between the cold channel temperature value and the cooling setting temperature is lower than the preset temperature threshold, and the first difference between the return air temperature of the first standby unit in the room-level air conditioning group and the cooling setting temperature of the monitoring host does not exceed the preset difference threshold, it is determined that the group control configuration mode of the multi-group computer room air conditioning group is a balanced operation mode;

[0117] In detail, the balancing operation mode is:

[0118] In the preset first balancing operation cycle, the air conditioner unit with the longest cooling start time in the room-level air conditioner group is selected, and the second air conditioner unit with the shortest operation time in the room-level air conditioner group or the row-to-row air conditioner group is selected based on the balance of the first air conditioner unit;

[0119] Every preset balancing cycle, the third air-conditioning unit with the shortest running time in the room-level air-conditioning group is screened out, and the third air-conditioning unit is switched from standby to cooling operation state, and the fourth air-conditioning unit currently in cooling operation is switched to standby state until the balancing control time ends.

[0120] In one implementation, the monitoring host first defines the air-conditioning unit with the longest refrigeration startup time as the first balancing slave, and based on the first balancing slave, selects the unit with the shortest refrigeration operation time from the inter-row air-conditioning group module and defines it as the second balancing slave, and controls the second balancing slave to enable refrigeration, and the original first balancing slave is switched to standby state; while waiting for the balance switching cycle to arrive again, the monitoring host again performs refrigeration operation statistics on the air-conditioning units in the inter-row air-conditioning group module, and finds the unit with the shortest operation time to be defined as the third balancing slave, the original second balancing slave is switched to standby state or maintains the refrigeration state, and the third balancing slave will enable refrigeration; after the last air-conditioning unit is defined as the balancing slave and enabled, it is switched back to the first balancing slave, and the cycle is repeated.

[0121] When switching the above-mentioned balanced slaves, the following problems may occur:

[0122] Case 1: If the second balancing slave is in standby mode, it is forced to switch to cooling mode. During the balancing switching cycle, the cooling demand judgment of the second balancing slave is defined separately. When the air supply temperature T 送风 <[T 送风设定 -ΔT*A], stop cooling operation; when the supply air temperature T 送风 In [T 送风设定 +ΔT]>T 送风 ≥[T 送风设定 -ΔT*A], the air conditioner automatically adjusts the cooling output according to the logic; if the second balancing slave is originally in the cooling / dehumidification state, it maintains the cooling / dehumidification state. (The air supply temperature sensor is installed in the air supply area of ​​the corresponding air conditioning unit to collect the real-time air supply temperature of the inter-row air conditioner. The controller detects the air supply temperature to calculate the relevant demand and issue the execution of relevant strategy instructions).

[0123] Case 2: When the switching cycle arrives, if the monitoring host calculates that the cooling demand of the second balancing slave is less than 100% (i.e., T 送风 <[T 送风设定 +ΔT]), the second balancing slave is switched to standby mode; if the monitoring host calculates that the cooling demand of the 2# balancing slave is greater than or equal to 100% (i.e., T 送风 ≥[T 送风设定 +ΔT]), the 2# balancing slave still maintains the cooling state to prevent local high temperature from occurring after stopping cooling.

[0124] Scenario 3: There may be an air-conditioning unit whose cooling time is calculated to be the shortest multiple times. If this happens, the cooling time of the air-conditioning unit will be accumulated until the balance time is accumulated continuously, and then the cooling time will be switched to the remaining units.

[0125] In addition, when the balanced operation mode is applied to the room-level air-conditioning group, the first balanced slave defined by the monitoring host is used as a benchmark, and the air-conditioning unit with the shortest running time is selected from the room-level air-conditioning group as the second balanced slave. The second balanced slave will enable refrigeration, and the original first balanced slave will be switched to standby mode; when waiting for the balanced switching cycle to arrive again, the monitoring host will again count the refrigeration running time of each air-conditioning unit in the room-level air-conditioning group, and find the air-conditioning unit with the shortest running time to be defined as the third balanced slave. The original second balanced slave will be switched to standby mode or remain in refrigeration mode, and the third balanced slave will enable refrigeration; until the last air-conditioning unit in the room-level air-conditioning group is defined as a balanced slave and enabled, it will switch back to the first balanced slave again, and the cycle will continue.

[0126] The above balancing operation mechanism may have the following situations:

[0127] Case 1: If the second balancing slave is in standby mode, it is forced to switch to cooling mode. During the balancing switching cycle, the cooling demand judgment of the second balancing slave is defined separately. When the return air temperature T 回风 <[T 回风设定 -ΔT*A], stop cooling operation; when the return air temperature T 回风 In [T 回风设定 +ΔT]>T 回风 ≥[T 回风设定 -ΔT*A], the air conditioner adjusts the cooling output according to its own logic; if the second balancing slave is originally in cooling / dehumidification state, it maintains the cooling / dehumidification state.

[0128] Case 2: When the switching cycle arrives, if the monitoring host calculates that the cooling demand of the second balancing slave is less than 100% (i.e., T 回风 <[T 回风设定 +ΔT]), the second balancing slave is switched to standby mode; if the monitoring host calculates that the cooling demand of the second balancing slave is greater than or equal to 100% (i.e., T 回风 ≥[T 回风设定 +ΔT]), the 2# balancing slave still maintains the cooling state to prevent local high temperature from occurring after the cooling stops.

[0129] Scenario 3: Similarly, there may be an air-conditioning unit that calculates the shortest cooling time multiple times, that is, the time is accumulated until the balance time continues to accumulate, and then it is switched to the remaining units.

[0130] In the air-conditioning group, one or more air-conditioning units may fail. When an air-conditioning unit fails, the group control configuration mode of the multi-group computer room air-conditioning group is determined to be a fault switching mode.

[0131] Specifically, the step of determining the group control configuration mode of the multi-group computer room air conditioner group according to one or more of the supply air temperature data, the return air temperature data and the cold channel temperature and humidity values ​​includes:

[0132] Determine whether there is a faulty air conditioner unit in the room-level air conditioner group or the row-level air conditioner group. If so, determine that the group control configuration mode of the multi-group computer room air conditioner group is the fault switching mode;

[0133] The fault switching method is: controlling the faulty air-conditioning unit to switch to a standby state, and at the same time controlling the standby unit with the highest return air temperature in the room-level air-conditioning group to start operation.

[0134] In one implementation, if an air-conditioning unit in the inter-row air-conditioning group module fails, if there is a unit in standby mode in the inter-row air-conditioning group, the standby unit with the highest air supply temperature is started, and the original faulty unit is switched to standby mode; if another unit triggers a fault, the next standby unit with the highest air supply temperature is started until all standby units are put into use.

[0135] When an air-conditioning failure occurs in the inter-row air-conditioning group in the inter-row air-conditioning group module, the faulty air-conditioning in the inter-row air-conditioning group module will be temporarily removed from the control scope of the balanced operation mode. Only when the fault is reset, the original faulty air-conditioning will re-participate in the group control and execute the recovery cooling or standby according to the instructions issued by the group control. The standby units originally participating in auxiliary cooling will resume the standby state one by one every 5 minutes in the order of the smallest cooling demand; the original faulty air-conditioning will participate in the balanced operation time function again.

[0136] If applied to a room-level air-conditioning group, first determine whether there is a fault in any air-conditioning unit in the room-level air-conditioning group. If there is a unit in standby state in the room-level air-conditioning group, control the standby unit with the highest return air temperature to start, and the original faulty unit is downgraded to standby state; if another unit triggers a fault, start the next standby unit with the highest return air temperature until all standby units are put into use.

[0137] Similarly, when an air-conditioning unit in the room-level air-conditioning group fails, the faulty air-conditioning unit will be temporarily excluded from the balanced operation time function. Only when the fault is reset, the original faulty air-conditioning unit will re-participate in the group control and resume cooling or standby according to the instructions issued by the group control. The standby units originally participating in auxiliary cooling will resume standby status one by one every 5 minutes in the order of the smallest cooling demand; the original faulty air-conditioning unit will participate in the balanced operation time function again.

[0138] Furthermore, in order to achieve a more energy-saving control effect, when controlling the multi-group computer room air conditioning group, the average temperature of the cold channel temperature and humidity values ​​is used to determine whether the first-level cold source operation condition is met. If it is met, the group control configuration mode of the multi-group computer room air conditioning group is determined to be the cold source priority mode. The first-level cold source operation condition is defined as: the average cold channel temperature T in a single inter-row air conditioning group module 送风平均 ≥T 送风设定 +ΔT, the inter-row air conditioning group module has 100% cooling demand.

[0139] The specific implementation method of applying the group control method based on the cold source priority method to the inter-row air conditioning group module is as follows:

[0140] Each air-conditioning unit in the inter-row air-conditioning group module transmits the local supply air temperature / return air relative humidity value to the monitoring host. The total demand of the monitoring host is obtained by collecting the temperature and humidity data of the cold channel temperature and humidity sensor, and calculating the average temperature of the cold channel; if the monitoring host collects that there are air-conditioning units in the inter-row air-conditioning group module with 100% cooling demand, and the total demand calculated by the monitoring host of this inter-row air-conditioning group module does not meet the operating conditions of the first-level cold source, the first-level cold source will not be turned on, and the cooling of this inter-row air-conditioning unit with 100% cooling demand will not be enabled.

[0141] When the total demand of the host meets the operating conditions of the first-level cold source, the online inter-row air conditioners in the module will be started in priority according to the demand issued by the monitoring host; if the total demand is cooling, the cooling demand will be allocated only to those inter-row air conditioners whose own calculation demand is cooling. The units with greater cooling demand will have a priority in the startup sequence, that is, the units that need cooling the most will be given priority in allocating cooling demand and outputting cooling capacity; if the self-calculated demand is heating, the cooling demand will not be allocated to the air conditioner, and the heating will not work at the same time; only units with normal operation of the internal fan and no abnormalities such as fan failure, two-way water valve failure, water immersion failure, return air / supply air temperature sensor failure, etc. will participate in the cooling demand allocation; the logic of heating, dehumidification and humidification is similar.

[0142] For the air conditioner units in the inter-row air conditioner group module, if it is calculated that there is a cooling demand above the first level, the first level cold source demand will be allocated first, and after the first level cold source is allocated, the second level cold source demand will be allocated. If the first level cold source inter-row air conditioner of a single module has allocated 100% of the cooling demand, if there is still a remaining cooling demand in the total demand, the remaining demand needs to be allocated to the second level cold source in standby state, and the room-level air conditioner in standby state will execute whether to start cooling according to the allocated demand and the instruction issued by the monitoring host.

[0143] Total demand calculation method: The monitoring host takes the average value of the temperature and humidity values ​​collected by the cold channel temperature and humidity sensors corresponding to the inter-row air conditioning group module and compares it with the cooling set value, calculates the demand direction, and sends the calculated control direction to each air conditioning unit. The specific cooling demand of each air conditioning unit is calculated by the temperature and humidity collected by each air conditioning unit and the set point, and then each unit acts according to the allocation demand issued by the monitoring host. For example, if the host issues a cooling demand, each unit will perform cooling and heating will be prohibited, and the specific cooling demand of each unit is calculated and executed by each unit.

[0144] Total demand allocation principle: according to the cooling demand in the first-level cold source, the demand value is calculated from high to low and allocated; when all air-conditioning units in the inter-row air-conditioning group module have been allocated, there is still remaining cooling demand, which is allocated to the standby room-level air-conditioning with the highest return air temperature corresponding to the second-level cold source).

[0145] Considering the possibility of overload in some IT cabinets, when the air supply temperature of the inter-row air conditioner T 送风 Than cooling set temperature T 送风设定 A high ΔT*A (A-local hot spot determination coefficient, configurable, default 2) indicates that there are many cabinet IT devices on the left and right sides of this inter-row air conditioner, resulting in a large heat load and high local temperature. If the total host demand does not meet the first-level cold source operating conditions at this time, this inter-row air conditioner will not be constrained by the main control and will start cooling in advance based on its own computing needs to avoid excessive local temperature in the inter-row air conditioner group module.

[0146] The monitoring host constrains the calculation of the total demand and the control direction (unit operation mode). The operation mode of each air-conditioning unit is constrained by the monitoring host, and the operation mode of each air-conditioning unit is constrained by the above local high temperature control strategy.

[0147] Limitation requirement for the number of inter-row air conditioning group modules that can be turned on: N+X can be defined based on the total power of the computer room obtained from the monitoring host and the sub-item power of each sub-module; the power of the inter-row air conditioning group module is set to

[0148] Wa, when This means that the power of this module is small. In group control mode, the air conditioning group module of this row

[0149] The total number of units Na with refrigeration turned on shall not be greater than 5; This means that the module power of this inter-row air conditioner group is relatively large, and the inter-row air conditioners need to be fully turned on for cooling, and the room-level air conditioners need to be turned on for cooling simultaneously. (The rated cooling capacity of the inter-row air conditioner group is defined as 17kW).

[0150] The limit requirement for the number of room-level air conditioner groups turned on is: N+X can be defined based on the total power of the computer room obtained from the monitoring host and the sub-item power of each room-level air conditioner; the total power of the computer room is set to W2, and the power of each sub-module is Wa~We. When:

[0151]

[0152] In group control mode, the total number of room-level air conditioners that can be turned on for cooling shall not exceed 5;

[0153] when This indicates that the power of this equipment room is almost fully loaded, and both the row-level air conditioners and the room-level air conditioners need to be fully turned on for cooling. The rated cooling capacity of the room-level air conditioner is defined as 150kW.

[0154] It can be imagined that the limit on the number of row-level air conditioners and room-level air conditioners only makes a rough calculation of the number of air conditioners turned on in the computer room. The actual number of air conditioners turned on may be affected by factors such as the outdoor environment, load distribution uniformity, and local hotspots, resulting in certain differences. That is, the limit on the number of air conditioners turned on is the lowest level of restriction, which is mainly aimed at applications where the load distribution is relatively uniform.

[0155] Furthermore, in order to further achieve energy-saving effects, the power range of IT equipment can be divided into two power intervals, power interval 1 is (0-40%), and power interval 2 is (41%-100%). The relevant power parameters of IT equipment can be collected from the power distribution cabinet by the upper computer monitoring host and calculated.

[0156] The power range distinction method is: according to the power values ​​corresponding to the row-level air conditioning group and the room-level air conditioning group, the corresponding operation mode of each air conditioning unit is controlled.

[0157] In one implementation, when the power range of the air-conditioning group is between 0% and 40% (calculation basis: the total cooling capacity of the first-level cold source is when all the row-to-row air conditioners in the 5 row-to-row air-conditioning group modules are turned on for cooling, that is, Q=17*8*5=680kW, considering the leakage coefficient of 5% (empirical value), that is, the total cooling capacity of the first-level cold source is approximately Q1=680*(100%-5%)=646kW, accounting for the proportion of IT full load power of &=646 / 1560≈41%, taking &=40&), the row-to-row air conditioners of the first-level cold source in standby state will be in a shutdown state, and the internal fans will not run.

[0158] Considering that when the inter-row air conditioner is turned on, some cold air flows away from under the static floor, resulting in cooling loss, in order to balance the static pressure of the first and second cold pools, the room-level air conditioner with address 1 is kept running at the standby speed, and the other second-level cold source room-level air conditioners are in the shutdown state, and the internal fans are not running. When the balanced operation time is reached, the room-level air conditioner with address 2 is switched to standby operation, and the air conditioner with address 1 is restored to the shutdown state, and this cycle is repeated; if the air conditioner in standby operation fails, the air conditioner with the next address is switched to operation, and the faulty air conditioner exits the group control mode, and rejoins the group after the alarm is restored, and the address remains unchanged.

[0159] When the power range of the air-conditioning group is between 41% and 100%, it means that the cooling output of the inter-row air-conditioning group can no longer meet the heat dissipation requirements of the IT load. The fans in the inter-row air-conditioning of the first-level cold source that was originally in the shutdown state run at the standby speed to maintain air circulation; the fans in the room-level air-conditioning of the second-level cold source that is in the standby state run at the standby speed to maintain air circulation and prevent short-circuiting of the cold air flow.

[0160] The method of this embodiment aims at the application of using multiple groups of computer room air-conditioning equipment for cooling and heat dissipation in the same data center computer room. With "equipment increase and decrease" as the main line, the intelligent multi-group computer room air-conditioning group control strategy of this patent is formed to completely solve the following problems: avoid competition between cooling / heating and dehumidification / humidification; optimize and solve local hot spots in the computer room; balance the operating time, improve the reliability of the unit and improve the unit fault switching mechanism, save energy consumption, and improve the availability level of the air-conditioning group.

[0161] This embodiment discloses the above method and also discloses a group control system for multiple groups of computer room air conditioners. Figure 1 As shown, it includes: at least one inter-row air-conditioning group module 30, at least one room-level air-conditioning group 20 and at least one monitoring host; the inter-row air-conditioning group module 30 includes multiple inter-row air-conditioning groups 10, and the inter-row air-conditioning group 10 and the room-level air-conditioning group 20 both include multiple air-conditioning units; the inter-row air-conditioning group module 30 is correspondingly provided with a cold channel temperature and humidity sensor.

[0162] The row-to-row air conditioning group 10 is used to collect supply air temperature data; the room-level air conditioning group 20 is used to collect return air temperature data; and the cold channel temperature and humidity sensor 50 is used to collect cold channel temperature and humidity values.

[0163] The monitoring host is used to determine the group control configuration mode of the multi-group computer room air-conditioning group according to one or more of the supply air temperature data, the return air temperature data and the cold channel temperature and humidity values; the group control configuration mode includes: the operation control parameters and operation control mode of each air-conditioning unit; and controlling the inter-row air-conditioning group and / or the room-level air-conditioning group to execute the group control configuration mode.

[0164] It can be imagined that the monitoring host needs to support the setting of the "group control mode" to enable and disable functions. When the monitoring host enables the group control mode function and sets the corresponding group control parameters, the setting parameters will be sent to each slave machine through RS485 communication; if the setting is closed, the air-conditioning group will not enable the group control function, and each air-conditioning unit will judge whether to turn on cooling / dehumidification / heating / humidification or remain in standby or shutdown state according to its own cooling needs.

[0165] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed in this application. The description and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0166] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0167] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable storage medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or used in combination with these instruction execution systems, devices or apparatuses.

[0168] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0169] It is understandable that the above embodiments are exemplary and cannot be construed as limitations on the present application. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A group control method for multiple groups of computer room air conditioners, characterized in that: The multi-group computer room air conditioning group includes: at least one inter-row air conditioning group module and at least one room-level air conditioning group; the inter-row air conditioning group module includes multiple inter-row air conditioning groups, and the inter-row air conditioning group and the room-level air conditioning group each include multiple air conditioning units; the inter-row air conditioning group module is correspondingly provided with a cold channel temperature and humidity sensor; The group control method comprises: Acquire the supply air temperature data collected by the inter-row air conditioning group, the return air temperature data collected by the room-level air conditioning group, and the cold aisle temperature and humidity values ​​collected by the cold aisle temperature and humidity sensor; Determine the group control configuration mode of the multi-group computer room air conditioning group according to one or more of the supply air temperature data, the return air temperature data and the cold channel temperature and humidity values; the group control configuration mode includes: the operation control parameters and operation control mode of each air conditioning unit; The inter-row air conditioning group and / or the room-level air conditioning group are controlled to execute the group control configuration mode.

2. The group control method of multiple computer room air conditioners according to claim 1, characterized in that: The step of determining the group control configuration mode corresponding to the air conditioning group unit according to the air supply temperature data and the cold channel temperature and humidity values ​​comprises: Determine the operation mode corresponding to the total demand according to the average temperature value of the temperature and humidity of the cold channel, and calculate the operation mode corresponding to each air-conditioning unit in the inter-row air-conditioning group according to the supply air temperature; Determine whether the air conditioning operation mode corresponding to the total demand and the air conditioning operation mode corresponding to each air conditioning unit in the inter-row air conditioning group are opposite; If the opposite is true, the group control configuration mode corresponding to the multi-group computer room air conditioning group is determined to be an anti-competition operation mode; the anti-competition operation mode is to control each air-conditioning unit in the inter-row air-conditioning group to adjust the temperature and humidity in an operation mode that is compatible with the operation mode corresponding to the total demand.

3. The group control method of multiple computer room air conditioners according to claim 2, characterized in that: The operation modes include: cooling, heating, air supply, standby and dehumidification; The step of controlling each air-conditioning unit in the inter-row air-conditioning group to adjust the temperature and humidity in an operating mode adapted to the operating mode corresponding to the total demand includes: If the operation mode corresponding to the total demand is cooling, and the operation mode corresponding to each air-conditioning unit in the inter-row air-conditioning group is heating, then each air-conditioning unit whose operation mode is heating is controlled to execute the operation mode of air supply or shutdown; If the operation mode corresponding to the total demand is humidification, and the operation mode corresponding to each air-conditioning unit in the inter-row air-conditioning group is dehumidification, then each air-conditioning unit whose corresponding operation mode is dehumidification is controlled to execute the standby or shutdown air-conditioning operation mode.

4. The group control method of multiple computer room air conditioners according to claim 1, characterized in that: The step of determining the group control configuration mode corresponding to the air conditioning group units according to the return air temperature data comprises: The average temperature value of the total demand is calculated based on the return air temperature data of the room-level air conditioning group; Determine the operation mode corresponding to the total demand according to the average temperature value of the total demand, and determine the operation mode corresponding to the room-level air conditioning group itself according to the return air temperature data; Determine whether the operation mode corresponding to the total demand is opposite to the operation mode corresponding to each air-conditioning unit in the room-level air-conditioning group; If the opposite is true, the group control configuration mode corresponding to the multi-group computer room air conditioning group is determined to be an anti-competition operation mode; the anti-competition operation mode is to control each air-conditioning unit in the room-level air-conditioning group to adjust the temperature and humidity in an operation mode that is compatible with the operation mode corresponding to the total demand.

5. The group control method of multiple computer room air conditioners according to claim 2, characterized in that: The step of determining the group control configuration mode of the multi-group computer room air conditioner group according to one or more of the supply air temperature data, the return air temperature data and the cold channel temperature and humidity values ​​also includes: Calculate the difference between the temperature and humidity values ​​of the cold channel and the refrigeration set temperature, and based on whether the difference exceeds a preset threshold, determine that the group control configuration mode of the multi-group computer room air-conditioning group is a local hotspot elimination mode; wherein, the group control configuration mode of the local hotspot elimination mode includes: increasing the number of standby units in the inter-row air-conditioning group entering the auxiliary cooling state, or reducing the number of air-conditioning units in the inter-row air-conditioning group entering the auxiliary cooling state.

6. The group control method of multiple computer room air conditioners according to claim 5, characterized in that: The specific control steps of increasing the number of standby units in the inter-row air conditioning group entering the auxiliary cooling state, or reducing the number of air conditioning units in the inter-row air conditioning group entering the auxiliary cooling state in the local hot spot elimination method include: Determine whether the difference between the cold aisle temperature value detected by any cold aisle temperature and humidity sensor and the refrigeration set temperature is higher than a preset temperature threshold; If the difference between the cold channel temperature value and the cooling set temperature is higher than the preset temperature threshold, the control increases the number of standby units in the current inter-row air conditioning group that perform auxiliary cooling, otherwise the control reduces the number of air conditioning units in the current inter-row air conditioning group that perform auxiliary cooling; If all the standby units in the current inter-row air conditioning group have been started to perform auxiliary cooling, and the cold channel temperature value is higher than the cooling set temperature by a preset temperature threshold, the control will start the standby units in the room-level air conditioning group to perform auxiliary cooling until the cold channel temperature value is equal to or lower than the cooling set temperature by a preset temperature threshold.

7. The group control method of multiple computer room air conditioners according to claim 4, characterized in that: The step of determining the group control configuration mode of the multi-group computer room air conditioner group according to one or more of the supply air temperature data, the return air temperature data and the cold channel temperature and humidity values ​​comprises: After receiving the auxiliary cooling command issued by the monitoring host, the control makes the first standby unit with the highest return air temperature in the room-level air conditioning group enter the auxiliary cooling state; Calculating a first difference between the return air temperature of the first standby unit and the refrigeration setting temperature of the monitoring host, and determining whether the first difference exceeds a preset difference threshold; If exceeded, the group control configuration mode of the multi-group computer room air conditioner group is determined to be a local hotspot elimination mode; wherein the group control configuration mode of the local hotspot elimination mode includes: selecting the second standby unit with the highest return air temperature in the current room-level air conditioner group, and controlling the second standby unit to enter the auxiliary cooling state; Calculating a second difference between the return air temperature of the second standby unit and the refrigeration setting temperature of the monitoring host, and determining whether the second difference exceeds a preset difference threshold; If it exceeds, the second standby unit with the highest return air temperature in the current room-level air conditioning group is selected, and the second standby unit is controlled to enter the auxiliary cooling state; Calculating a third difference between the return air temperature of the second standby unit and the refrigeration setting temperature of the monitoring host, and determining whether the third difference exceeds a preset threshold; If it exceeds, repeatedly screen out the Kth standby unit with the highest return air temperature in the current room-level air-conditioning group, control the Kth standby unit to enter the auxiliary cooling state, and calculate the Kth difference until the kth difference does not exceed the preset threshold.

8. The group control method of multiple computer room air conditioners according to claim 2, characterized in that: The step of determining the group control configuration mode of the multi-group computer room air conditioner group according to one or more of the supply air temperature data, the return air temperature data and the cold channel temperature and humidity values ​​comprises: When it is detected that the air conditioning operation mode corresponding to the total demand is the same as the air conditioning operation mode corresponding to each air conditioning unit in the inter-row air conditioning group, the difference between the cold channel temperature value and the cooling set temperature is lower than the preset temperature threshold, and the first difference between the return air temperature of the first standby unit in the room-level air conditioning group and the cooling set temperature of the monitoring host does not exceed the preset difference threshold, it is determined that the group control configuration mode of the multi-group computer room air conditioning group is a balanced operation mode; Wherein, the balanced operation mode is: In the preset first balancing operation cycle, the air conditioner unit with the longest cooling start time in the room-level air conditioner group is selected, and the second air conditioner unit with the shortest operation time in the room-level air conditioner group or the row-to-row air conditioner group is selected based on the balance of the first air conditioner unit; Every preset balancing cycle, the third air-conditioning unit with the shortest running time in the room-level air-conditioning group is screened out, and the third air-conditioning unit is switched from standby to cooling operation state, and the fourth air-conditioning unit currently in cooling operation is switched to standby state until the balancing control time ends.

9. The group control method of multiple computer room air conditioners according to claim 1, characterized in that: The step of determining the group control configuration mode of the multi-group computer room air conditioner group according to one or more of the supply air temperature data, the return air temperature data and the cold channel temperature and humidity values, further includes: Determine whether there is a faulty air conditioner unit in the room-level air conditioner group or the row-level air conditioner group. If so, determine that the group control configuration mode of the multi-group computer room air conditioner group is the fault switching mode; The fault switching mode is: controlling the faulty air conditioning unit to switch to a standby state, and at the same time controlling the standby unit with the highest return air temperature in the room-level air conditioning group to start operation; And, judging whether the first-level cold source operation condition is met according to the average temperature of the cold channel temperature and humidity value, if so, determining the group control configuration mode of the multi-group computer room air conditioning group as the cold source priority mode; The cold source priority method is: determining the cold source demand value according to the power values ​​corresponding to the row-level air conditioning group and the room-level air conditioning group, and controlling the number of air conditioning units performing cooling operation according to the calculated cold source demand value; And, according to the obtained power values ​​corresponding to the row-level air conditioning group and the room-level air conditioning group, the group control configuration mode of the multi-group computer room air conditioning group is determined as follows: power range distinction mode; The power range distinction method is: according to the power values ​​corresponding to the row-level air conditioning group and the room-level air conditioning group, the corresponding operation mode of each air conditioning unit is controlled.

10. A group control system for multiple groups of computer room air conditioners, characterized in that: include: At least one inter-row air conditioning group module, at least one room-level air conditioning group and at least one monitoring host; the inter-row air conditioning group module includes multiple inter-row air conditioning groups, and the inter-row air conditioning group and the room-level air conditioning group each include multiple air conditioning units; the inter-row air conditioning group module is correspondingly provided with a cold channel temperature and humidity sensor; The inter-row air conditioning group is used to collect supply air temperature data; The room-level air conditioning group is used to collect return air temperature data; The cold channel temperature and humidity sensor is used to collect the temperature and humidity values ​​of the cold channel; The monitoring host is used to determine the group control configuration mode of the multi-group computer room air conditioning group according to one or more of the supply air temperature data, the return air temperature data and the cold channel temperature and humidity values; the group control configuration mode includes: the operation control parameters and operation control mode of each air conditioning unit; And, controlling the inter-row air conditioning group and / or the room-level air conditioning group to execute the group control configuration method.

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