Method, device, computer room air conditioner and storage medium for controlling a computer room air conditioner

Abstract

The present application relates to the technical field of air conditioners, and discloses a method for controlling a computer room air conditioner. The computer room air conditioner includes: a chilled water unit; the method for controlling the computer room air conditioner includes: when the chilled water unit operates for refrigeration or dehumidification, obtaining real-time outlet air temperatures at a plurality of preset positions along the height direction of the heat exchanger of the chilled water unit; determining the evacuation requirement of the chilled water unit according to the real-time outlet air temperatures at each preset position; and controlling the operation of the chilled water unit according to the evacuation requirement. In this way, without a large number of improvements to the structure of the chilled water unit, the determination of the evacuation requirement and the execution of the evacuation action can be achieved, greatly saving costs. Moreover, it is not necessary to manually check the chilled water unit that needs to be evacuated and operate the evacuation, saving a large amount of manpower and material resources and improving work efficiency. The present application also discloses a device for controlling a computer room air conditioner, a computer room air conditioner, and a storage medium.

Description

Technical Field

[0001] This application relates to the technical field of air conditioners, for example, to a method, a device, a computer room air conditioner, and a storage medium for controlling a computer room air conditioner. Background Art

[0002] Chilled water computer room air conditioners are widely used in data centers to cool a large number of electronic device components in the computer room. Chilled water computer room air conditioners use chilled water as the cold source and require peripheral chilled water units and laid chilled water pipelines and other peripheral equipment, and the overall system is huge. During the initial construction and operation, the internal liquid vaporizes. There will be a certain amount of air or other non-condensable gases in the overall system, accumulating inside the pipeline or heat exchanger. When the air or non-condensable gases accumulate to a certain amount, it will cause air blockage in the heat exchanger, affecting the overall refrigeration effect of the unit.

[0003] The related art discloses a heat exchanger with an exhaust function, including a heat exchange chamber and a plurality of heat exchange pipes penetrating through the heat exchange chamber. A hot side inlet and a hot side outlet are arranged on one side of the heat exchange chamber, and a cold side inlet and a cold side outlet are arranged on the other side of the heat exchange chamber; a plurality of partition plates are fixedly installed on the top of the heat exchange chamber, a flow channel is formed between the partition plates, exhaust holes are also arranged on the partition plates, and an exhaust pipe is also communicated with the top of the heat exchange chamber.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

[0005] The related art avoids air blockage by improving the structure of the heat exchanger, and the cost is relatively high.

[0006] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present application, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0007] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. The summary is not a general review, nor is it intended to identify key / important elements or delineate the protection scope of these embodiments, but rather serves as a preface to the subsequent detailed description.

[0008] The embodiments of the present disclosure provide a method, a device, a computer room air conditioner, and a storage medium for controlling a computer room air conditioner to reduce the cost of avoiding air blockage.

[0009] In some embodiments, the computer room air conditioner includes: a chilled water unit; the method for controlling the computer room air conditioner includes: when the chilled water unit operates for refrigeration or dehumidification, obtaining the real-time outlet air temperatures at a plurality of preset positions along the height direction of the heat exchanger of the chilled water unit; determining the evacuation requirement of the chilled water unit according to the real-time outlet air temperatures at each preset position; and controlling the operation of the chilled water unit according to the evacuation requirement.

[0010] In some embodiments, the device for controlling the computer room air conditioner includes: a processor and a memory storing program instructions, and the processor is configured to execute the aforementioned method for controlling the computer room air conditioner when running the program instructions.

[0011] In some embodiments, the computer room air conditioner includes: a computer room air conditioner body; and the aforementioned device for controlling the computer room air conditioner, which is installed on the computer room air conditioner body; wherein, the computer room air conditioner body includes: a chilled water unit; and the chilled water unit includes: a heat exchanger.

[0012] In some embodiments, the storage medium stores program instructions, and the program instructions execute the aforementioned method for controlling the computer room air conditioner when running.

[0013] The method, device, computer room air conditioner, and storage medium for controlling the computer room air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects: when the chilled water unit operates for refrigeration or dehumidification, obtain the real-time outlet air temperatures at a plurality of preset positions along the height direction of the heat exchanger. Determine the evacuation requirement of the corresponding chilled water unit based on the real-time outlet air temperatures at each preset position, that is, determine whether the corresponding chilled water unit needs to be evacuated. Then, control the operation of the corresponding chilled water unit according to the evacuation requirement. To control the corresponding chilled water unit to automatically perform the evacuation action when the corresponding chilled water unit needs to be evacuated. In this way, without a large number of improvements to the structure of the chilled water unit, the determination of the evacuation requirement and the execution of the evacuation action can be achieved, greatly saving costs. Moreover, it is not necessary to manually check the chilled water unit that needs to be evacuated and operate the evacuation, saving a large amount of manpower and material resources and improving work efficiency.

[0014] The above general description and the following description are only exemplary and explanatory, and are not used to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and among them:

[0016] Figure 1 is a schematic structural diagram of the computer room air conditioner provided by the embodiments of the present disclosure;

[0017] Figure 2 It is a schematic diagram of a method for controlling a computer room air conditioner provided by an embodiment of the present disclosure;

[0018] Figure 3 It is a schematic diagram of another method for controlling a computer room air conditioner provided by an embodiment of the present disclosure;

[0019] Figure 4 It is a schematic diagram of another method for controlling a computer room air conditioner provided by an embodiment of the present disclosure;

[0020] Figure 5 It is a schematic diagram of another method for controlling a computer room air conditioner provided by an embodiment of the present disclosure;

[0021] Figure 6 It is a schematic diagram of another method for controlling a computer room air conditioner provided by an embodiment of the present disclosure;

[0022] Figure 7 It is a schematic diagram of a device for controlling a computer room air conditioner provided by an embodiment of the present disclosure;

[0023] Figure 8 It is a schematic diagram of another device for controlling a computer room air conditioner provided by an embodiment of the present disclosure;

[0024] Figure 9 It is a schematic diagram of a computer room air conditioner provided by an embodiment of the present disclosure.

[0025] Reference numerals:

[0026] 1, main water supply pipeline; 2, main water return pipeline; 3, chilled water unit; 31, heat exchanger; 32, chilled water inlet pipe; 33, chilled water outlet pipe; 34, temperature sensor; 35, flow regulating valve; 36, drain valve; 37, air supply unit; 371, fan. Detailed implementation manners

[0027] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are only for reference and illustration purposes and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, multiple details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be shown in a simplified manner to simplify the drawings.

[0028] In the description, claims, and above-mentioned drawings of the embodiments of the present disclosure, terms such as "first" and "second" are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so as to implement the embodiments of the present disclosure described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0029] Unless otherwise specified, the term "plurality" means two or more.

[0030] In the embodiments of the present disclosure, the character " / " indicates that the front and rear objects have an "or" relationship. For example, A / B means: A or B.

[0031] The term "and / or" is a description of the associated relationship of an object, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B these three relationships.

[0032] The term "corresponding" may refer to an associated relationship or a binding relationship. A corresponding to B means that there is an associated relationship or a binding relationship between A and B.

[0033] Combined Figure 1 As shown, the embodiments of the present disclosure provide a computer room air conditioner. The computer room air conditioner includes a computer room air conditioner body. The computer room air conditioner body includes: a main water supply pipeline 1, a main water return pipeline 2, and multiple chilled water units 3. Each chilled water unit 3 includes: a heat exchanger 31, a chilled water inlet pipe 32, and a chilled water outlet pipe 33. The first end of the chilled water inlet pipe 32 is communicated with the main water supply pipeline 1, and the second end is communicated with the water inlet of the corresponding heat exchanger 31. The first end of the chilled water outlet pipe 33 is communicated with the main water return pipeline 2, and the second end is communicated with the water outlet of the corresponding heat exchanger 31.

[0034] On the air outlet side of the heat exchanger 31 and along the height direction of the heat exchanger 31, a plurality of temperature sensors 34 are uniformly arranged in sequence to obtain the air outlet temperature at the corresponding preset position. Specifically, a blower unit 37 is further arranged on the air outlet side of the heat exchanger 31, and each temperature sensor 34 is arranged between the air outlet side of the heat exchanger 31 and the blower unit 37. The blower unit 37 includes a plurality of blowers 371.

[0035] Each chilled water unit 3 further includes: a flow regulating valve 35 and an evacuation valve 36. The flow regulating valve 35 is arranged on the water outlet side of the corresponding heat exchanger 31, that is, on the corresponding chilled water outlet pipe 33, to regulate the chilled water outlet flow. The evacuation valve 36 is arranged on the top of the corresponding heat exchanger 31. The evacuation valve 36 is a solenoid valve, and its valve body opens after the electromagnetic coil is powered on, and then the non-condensable gas in the corresponding heat exchanger 31 can be discharged.

[0036] The computer room air conditioner further includes: a processor. The processor is communicatively connected to the temperature sensor 34, the flow regulating valve 35, and the evacuation valve 36 to obtain the temperature at the corresponding preset position through the temperature sensor 34, and then control the flow regulating valve 35 and the evacuation valve 36.

[0037] Combined with Figure 2 As shown, an embodiment of the present disclosure provides a method for controlling a computer room air conditioner, including:

[0038] S201, when the chilled water unit of the computer room air conditioner operates for refrigeration or dehumidification, obtain the real-time outlet air temperature at multiple preset positions along the height direction of the heat exchanger of the chilled water unit.

[0039] S202, the computer room air conditioner determines the evacuation requirement of the chilled water unit according to the outlet air temperature at each preset position.

[0040] S203, the computer room air conditioner controls the operation of the chilled water unit according to the evacuation requirement.

[0041] When the chilled water unit operates for refrigeration or dehumidification according to the environmental requirement, control the flow regulating valve to adjust the opening degree in real time according to the requirement. At the same time, control the supply air fan unit to operate at the rated cold air gear or the dehumidification low air gear according to the requirement. Obtain the real-time outlet air temperature at the corresponding preset position through each temperature sensor. If there is a large amount of non-condensable gas accumulated in the heat exchanger, the heat transfer at the position where the non-condensable gas is accumulated will become worse, and then the outlet air temperature will be different from that at other positions. Therefore, determine the evacuation requirement of the corresponding chiller according to the outlet air temperature at each preset position. Control the operation of the chilled water unit according to the evacuation requirement to control whether the chilled water unit performs the evacuation action.

[0042] By using the method for controlling a computer room air conditioner provided by the embodiment of the present disclosure, when the chilled water unit operates for refrigeration or dehumidification, obtain the real-time outlet air temperature at multiple preset positions in the height direction of the heat exchanger. Determine the evacuation requirement of the corresponding chilled water unit based on the real-time outlet air temperature at each preset position, that is, judge whether the corresponding chilled water unit needs to be evacuated. Then control the operation of the corresponding chilled water unit according to the evacuation requirement. In the case where the corresponding chilled water unit needs to be evacuated, control the corresponding chilled water unit to automatically perform the evacuation action. In this way, without a large number of improvements to the structure of the chilled water unit, it is possible to determine the evacuation requirement and execute the evacuation action, greatly saving costs. Moreover, it is not necessary to manually check the chilled water unit that needs to be evacuated and operate the evacuation, saving a large amount of manpower and material resources and improving work efficiency.

[0043] Combined with Figure 3 As shown, an embodiment of the present disclosure provides another method for controlling a computer room air conditioner, including:

[0044] S201. When the computer room air conditioner operates for refrigeration or dehumidification with the chiller unit, obtain the real-time outlet air temperatures at multiple preset positions along the height direction of the heat exchanger of the chiller unit.

[0045] S212. The computer room air conditioner calculates the real-time average temperature of the real-time outlet air temperatures at other positions.

[0046] S222. The computer room air conditioner determines the evacuation requirement of the chiller unit according to the first real-time outlet air temperature at the highest position, the second real-time outlet air temperature at the sub-highest position, and the real-time average temperature.

[0047] S203. The computer room air conditioner controls the operation of the chiller unit according to the evacuation requirement.

[0048] The preset positions from top to bottom are in turn: the highest position C1, the sub-highest position C2, the second sub-highest position C3, …, the middle position Cm, …, the sub-lowest position Cn-1, the lowest position Cn. Here, each position except the highest position C1 and the sub-highest position C2 is defined as other positions, that is, other positions refer to the set of the second sub-highest position C3 to the lowest position Cn.

[0049] Calculate the sum of the real-time outlet air temperatures at other positions according to formula (1), and divide the sum of temperatures by the number of other positions to obtain the real-time average temperature of other positions:

[0050] Tx = (TC3 + … + TCn) / (n - 2) Formula (1)

[0051] Wherein, n is the total number of preset positions, n - 2 is the total number of other positions except the highest position and the sub-highest position, TCn is the real-time outlet air temperature at the nth preset position from top to bottom, and Tx is the real-time average temperature of other positions.

[0052] For example, there are five preset positions, which are in turn: the highest position C1, the sub-highest position C2, the middle position C2, the sub-lowest position C4, and the lowest position C5. The real-time outlet air temperatures obtained by the temperature sensors corresponding to these preset positions are: TC1, TC2, TC3, TC4, and TC5. Calculate the real-time average temperature of other positions: Tx = (TC3 + TC4 + TC5) / 3.

[0053] When non-condensable gas accumulates in the heat exchanger, due to the characteristic that gas is easy to float, the non-condensable gas is generally located at a relatively upper position of the heat exchanger. Therefore, determine the evacuation requirement of the corresponding chiller unit according to the first real-time outlet air temperature TC1, the second real-time outlet air temperature TC2 at the highest position, and the real-time average temperature Tx.

[0054] Optionally, in step S222, the computer room air conditioner determines the evacuation requirement of the chilled water unit according to the first real-time outlet air temperature at the highest position, the second real-time outlet air temperature at the second highest position, and the real-time average temperature, including:

[0055] The computer room air conditioner calculates the first temperature difference between the first real-time outlet air temperature and the real-time average temperature, and the second temperature difference between the second real-time outlet air temperature and the real-time average temperature.

[0056] When the first temperature difference is greater than or equal to the first temperature threshold, the second temperature difference is greater than or equal to the second temperature threshold, and the first temperature difference is greater than the second temperature difference, the computer room air conditioner determines that the evacuation requirement of the chilled water unit is to be evacuated.

[0057] Calculate the first temperature difference between the first real-time outlet air temperature and the real-time average temperature according to formula (2):

[0058] Td1 = TC1 - Tx Formula (2)

[0059] Where, Td1 is the first temperature difference.

[0060] Calculate the second temperature difference between the second real-time outlet air temperature and the real-time average temperature according to formula (3):

[0061] Td2 = TC2 - Tx Formula (3)

[0062] Where, Td2 is the second temperature difference.

[0063] Set the first temperature threshold T1 and the second temperature threshold T2, and pre-store them in the processor of the computer room air conditioner. If Td1≥T1, Td2≥T2 and Td1≥Td2, it is determined that due to a certain degree of air blockage in the upper part of the heat exchanger, the heat exchange effect in the upper part becomes poor and the outlet air temperature is too high. Therefore, at this time, it is determined that the evacuation requirement of the corresponding chilled water unit is to be evacuated. Otherwise, that is, if any one of Td1≥T1, Td2≥T2, Td1≥Td2 is not satisfied, it is determined that the evacuation requirement of the corresponding chilled water unit is not to be evacuated.

[0064] Combined Figure 4 As shown, the embodiment of the present disclosure provides another method for controlling a computer room air conditioner, including:

[0065] S201, when the chilled water unit of the computer room air conditioner operates for refrigeration or dehumidification, the computer room air conditioner obtains the real-time outlet air temperatures at multiple preset positions along the height direction of the heat exchanger of the chilled water unit.

[0066] S202, the computer room air conditioner determines the evacuation requirement of the chilled water unit according to the outlet air temperatures at each preset position.

[0067] S213. When the evacuation requirement of the computer room air conditioner is that evacuation is needed, control the evacuation valve to open.

[0068] S223. When the evacuation requirement of the computer room air conditioner is that evacuation is not needed, control the evacuation valve to remain closed.

[0069] The evacuation valve opens only when evacuation is needed, so its initial state is closed. If it is determined that evacuation is needed, control the evacuation valve corresponding to the chilled water unit to open to discharge the non-condensable gas. If it is determined that evacuation is not needed, control the evacuation valve corresponding to the chilled water unit to remain closed.

[0070] Optionally, in step S213, when the computer room air conditioner controls the evacuation valve to open, it includes:

[0071] The computer room air conditioner controls the opening rate of the evacuation valve according to the real-time air outlet temperature at multiple preset positions until the evacuation valve is opened to the maximum opening.

[0072] Set the third temperature threshold T3 and the fourth temperature threshold T4, and pre-store them in the processor of the computer room air conditioner. Call the second temperature difference Td2 calculated according to the real-time air outlet temperature at each preset position. Compare the magnitudes of Td2, T3, and T4. Control the opening rate of the evacuation valve according to the temperature range where Td2 is located. The larger the end value of the temperature range where Td2 is located, the greater the opening rate of the evacuation valve. Optionally, if T3 < Td2 ≤ T4, control the opening rate of the evacuation valve to be the first rate K1. If T4 < Td2, control the opening rate of the evacuation valve to be the second rate K2. Among them, K2 > K1. Optionally, T3 = 1.1T2, T4 = 1.2T2, K2 = 1.5K1. Until the evacuation valve is opened to its maximum opening, control the opening of the evacuation valve to remain at the maximum opening. In this way, the larger the second temperature difference, the more serious the air blockage of the heat exchanger. Therefore, control the opening rate of the evacuation valve to be greater to evacuate the non-condensable gas as soon as possible. Generally, non-condensable gases will accumulate at the top of the heat exchanger. If the first temperature difference Td1 is used to judge the opening rate of the evacuation valve, it is easier to trigger the judgment condition. To further improve the accuracy of the judgment and avoid frequent triggering of the judgment action when there is a small amount of accumulated gas, the second temperature difference Td2 is used for judgment to further improve the accuracy and stability of the judgment. Of course, it is also feasible to use the first temperature difference Td1 for judgment.

[0073] Optionally, during the process of controlling the evacuation valve to open at the second rate K2, the computer room air conditioner acquires the new real-time outlet air temperature at each preset position. Substitute the new real-time outlet air temperature into the foregoing formulas to calculate the new second temperature difference Td2'. According to the decreasing rate of the new second temperature difference Td2' within the set duration, correct the current opening rate of the evacuation valve. This is because when the evacuation valve opens at the second rate, its opening rate is relatively fast. If the new second temperature difference Td2' also changes too quickly, it is easy to cause overshoot, so the current opening rate needs to be corrected. Optionally, the faster Td2' drops, the greater the degree of correction to the current opening rate.

[0074] Specifically, the decreasing rate of the new second temperature difference Td2' within the set duration is ΔV. If ΔV ≤ V1, the current opening rate is not corrected. If V1 < ΔV ≤ V2, the current opening rate is corrected to the third rate K3; if V2 < ΔV ≤ V3, the current opening rate is corrected to the fourth rate K4. If V3 < ΔV, the current opening rate is corrected to the first rate K1. Where K1 < K4 < K3 < K2. Optionally, K3 = 1.7K1, K4 = 1.3K1. Where, V1 is the first rate threshold, V2 is the second rate threshold, and V3 is the third rate threshold.

[0075] Combined Figure 5 As shown, another method for controlling a computer room air conditioner provided by an embodiment of the present disclosure includes:

[0076] S201, when the chilled water unit of the computer room air conditioner operates for refrigeration or dehumidification, acquire the real-time outlet air temperature at multiple preset positions along the height direction of the heat exchanger of the chilled water unit.

[0077] S202, the computer room air conditioner determines the evacuation requirement of the chilled water unit according to the outlet air temperature at each preset position.

[0078] S213, when the evacuation requirement is that evacuation is needed, the computer room air conditioner controls the evacuation valve to open.

[0079] S223, when the evacuation requirement is that evacuation is not needed, the computer room air conditioner controls the evacuation valve to remain closed.

[0080] S204, after the computer room air conditioner executes S213, acquire the current real-time outlet air temperature at multiple preset positions.

[0081] S205, the computer room air conditioner controls the on / off state of the evacuation valve according to the current real-time outlet air temperature.

[0082] After the evacuation valve is opened to the maximum opening degree, obtain the current real-time air outlet temperature at each preset position. Substitute the real-time air outlet temperatures at other positions into formula (1) to recalculate the current real-time average temperature. Substitute the current first real-time air outlet temperature and the current real-time average temperature into formula (2) to calculate the current first temperature difference Td1".

[0083] Set a fifth temperature threshold T5 and pre-store it in the processor of the computer room air conditioner. Compare the magnitudes of Td1" and T5. If Td1" > T5, control the corresponding evacuation valve to remain open. If Td1" ≤ T5, indicating that the non-condensable gas in the corresponding chiller has been discharged, control the corresponding evacuation valve to close to complete the evacuation operation of the chiller. After the chiller completes evacuation, it can enable the corresponding heat exchanger to continuously operate in a high-efficiency heat exchange state, thereby improving the overall refrigeration effect of the computer room air conditioner.

[0084] Combined Figure 6 As shown, another method for controlling a computer room air conditioner provided by an embodiment of the present disclosure includes:

[0085] S206, the computer room air conditioner controls the chiller to operate and supply air.

[0086] S207, the computer room air conditioner determines the correction requirements for the air outlet temperatures at each preset position.

[0087] S208, when there is a correction requirement for the air outlet temperature at a preset position and it needs to be corrected, the computer room air conditioner corrects the air outlet temperature at that preset position.

[0088] S209, the computer room air conditioner uses the corrected air outlet temperature as the real-time air outlet temperature at that preset position when the chiller operates for refrigeration or dehumidification.

[0089] S201, when the chiller operates for refrigeration or dehumidification, the computer room air conditioner obtains the real-time air outlet temperatures at multiple preset positions along the height direction of the heat exchanger of the chiller.

[0090] S202, the computer room air conditioner determines the evacuation requirements of the chiller according to the air outlet temperatures at each preset position.

[0091] S203, the computer room air conditioner controls the operation of the chiller according to the evacuation requirements.

[0092] Before the chiller operates for refrigeration or dehumidification, control the chiller to power on and start, and control the corresponding flow regulating valve to be in a closed state. In this way, control the chiller to operate and supply air. At the same time, control the air supply unit to maintain the rated refrigeration speed so that the current operating state of the air supply unit is consistent with the operating state during refrigeration.

[0093] Obtain the outlet air temperatures at each preset position through respective temperature sensors, which are: Tc1, Tc2, …, Tc n-1 , Tc n . Calculate the average temperature of the outlet air temperatures at each preset position according to formula (4):

[0094] Tcp = (Tc1 + Tc2 + … + Tc n ) / n Formula (4)

[0095] where, Tc n is the outlet air temperature at the nth preset position counted from top to bottom when the chilled water unit is operating for air supply; Tcp is the average temperature of the outlet air temperatures at n preset positions when the chilled water unit is operating for air supply.

[0096] Determine the correction requirements for the outlet air temperatures at each preset position, that is, determine whether the outlet air temperature at each position needs to be corrected. If there is a certain / some preset position that needs to be corrected, correct the outlet air temperature at that preset position. When the chilled water unit operates for refrigeration or dehumidification subsequently, use the corrected outlet air temperature as the real-time outlet air temperature at the corresponding position. That is, when calculating according to the foregoing formulas (1) to (3), substitute the corrected outlet air temperature here instead of the real-time temperature obtained by the temperature sensor. This is because when the chilled water unit is operating for air supply, the temperatures detected by the temperature sensors at each preset position are all room temperatures, so theoretically the outlet air temperatures at these preset positions are basically the same or have a small deviation. And when it is determined that the outlet air temperature at a certain / some preset position needs to be corrected, it proves that the resistance value of the corresponding temperature sensor has drifted, resulting in inaccurate detection of the outlet air temperature at that position. Thus, correct the outlet air temperature at that position and use the corrected outlet air temperature to participate in the subsequent control logic to make the control accuracy higher.

[0097] Optionally, the computer room air conditioner determines the correction requirements for the outlet air temperatures at each preset position, including:

[0098] The computer room air conditioner calculates the temperature difference between the outlet air temperature at each preset position and the average temperature.

[0099] When the temperature difference is less than the sixth temperature threshold and greater than the seventh temperature threshold, the computer room air conditioner determines that the correction requirement for the outlet air temperature at the corresponding preset position is no correction required.

[0100] When the temperature difference is greater than or equal to the sixth temperature threshold or the temperature difference is less than or equal to the seventh temperature threshold, the computer room air conditioner determines that the correction requirement for the outlet air temperature at the corresponding preset position is correction required.

[0101] Calculate the temperature difference between the outlet air temperature at each preset position and the average temperature according to formula (5):

[0102] ΔTn = Tcn - Tcp formula (5)

[0103] Wherein, ΔTn is the temperature difference between the outlet air temperature and the average temperature at the nth preset position counted from top to bottom when the chilled water unit is operating to supply air.

[0104] In this way, n temperature differences will be obtained, and each temperature difference ΔTn corresponds to a preset position.

[0105] Set the sixth temperature threshold T6 and the seventh temperature threshold T7, and pre-store them in the processor of the computer room air conditioner. Compare the magnitudes of ΔTn with T6 and T7. If T7 < ΔTn < T6, it indicates that the difference between the outlet air temperature and the average temperature at this position is within a reasonable range, so it is determined that the outlet air temperature at this position does not need to be corrected. If ΔTn ≥ T6 or ΔTn ≤ T7, then it is determined that the outlet air temperature at this position needs to be corrected.

[0106] For example, if T7 < ΔT3 < T6, then it is determined that the outlet air temperature at the third preset position from top to bottom does not need to be corrected. During subsequent operation of the chilled water unit for refrigeration or dehumidification, the temperature value detected in real time by the temperature sensor corresponding to the third preset position is used as the effective temperature value and substituted into the formula for calculation.

[0107] Another example, if ΔT4 ≥ T6 or ΔT4 ≤ T7, then the outlet air temperature at the fourth preset position from top to bottom needs to be corrected. The temperature detected by the temperature sensor corresponding to the fourth preset position is corrected to obtain the corrected outlet air temperature. During subsequent operation of the chilled water unit for refrigeration or dehumidification, the corrected outlet air temperature is used as the effective temperature value of the fourth preset position and substituted into the formula for calculation, rather than using the temperature value detected in real time by the temperature sensor corresponding to the fourth preset position as the effective value and substituting it into the formula for calculation. Optionally, T6 > 0, T7 < 0. T6 = -T7.

[0108] Optionally, the computer room air conditioner corrects the outlet air temperature at this preset position, including:

[0109] The computer room air conditioner corrects the outlet air temperature at this preset position to the average temperature.

[0110] If the outlet air temperature at a certain preset position needs to be corrected, then the outlet air temperature at this preset position is corrected to the previously calculated average temperature Tcp, that is, the average temperature Tcp calculated using formula (5) becomes the corrected outlet air temperature at this preset position.

[0111] For example, there are five preset positions, Tc1 is 45 °C, Tc2 is 35.1 °C, Tc3 is 35.4 °C, Tc4 is 34.7 °C, and Tc5 is 34.9 °C.

[0112] Calculated according to formula (4):

[0113] Tcp = (Tc1 + Tc2 + Tc3 + Tc4 + Tc5) / 5 = (45 + 35.1 + 35.4 + 34.7 + 34.9) / 5 = 37.02 (°C)

[0114] After comparison with T6 and T7, it is determined that Tc1 needs to be corrected. Then, Tc1 is corrected negatively by 7.98 °C so that the corrected Tc1 is 37.02 °C. The 37.02 °C obtained after correction is stored in the processor of the computer room air conditioner as the outlet air temperature at the first position (the highest position). When the chilled water unit operates for refrigeration or dehumidification subsequently and the outlet air temperature at the first position needs to be used in the calculation, 37.02 °C is substituted into the relevant formula for calculation (instead of substituting the real-time outlet air temperature detected by the temperature sensor corresponding to the first position into the relevant formula).

[0115] The above control logic is only for one chilled water unit. When the computer room air conditioner includes multiple chilled water units, each chilled water unit can be controlled according to the above logic.

[0116] Combined with Figure 7 As shown, an apparatus 70 for controlling a computer room air conditioner provided by an embodiment of the present disclosure includes: an acquisition module 71, a determination module 72, and a control module 73. The acquisition module 71 is configured to acquire the real-time outlet air temperatures at a plurality of preset positions along the height direction of the heat exchanger of the chilled water unit when the chilled water unit operates for refrigeration or dehumidification. The determination module 72 is configured to determine the evacuation requirement of the chilled water unit according to the real-time outlet air temperatures at each preset position. The control module 73 is configured to control the operation of the chilled water unit according to the evacuation requirement.

[0117] When using the apparatus for controlling a computer room air conditioner provided by an embodiment of the present disclosure, when the chilled water unit operates for refrigeration or dehumidification, the real-time outlet air temperatures at a plurality of preset positions in the height direction of the heat exchanger are acquired. Based on the real-time outlet air temperatures at each preset position, the evacuation requirement of the corresponding chilled water unit is determined, that is, it is judged whether the corresponding chilled water unit needs to be evacuated. Then, according to the evacuation requirement, the operation of the corresponding chilled water unit is controlled. So as to control the corresponding chilled water unit to automatically perform the evacuation action when the corresponding chilled water unit needs to be evacuated. In this way, without a large number of improvements to the structure of the chilled water unit, the determination of the evacuation requirement and the execution of the evacuation action can be realized, greatly saving costs. Moreover, it is also not necessary to manually check the chilled water unit that needs to be evacuated and operate the evacuation, saving a large amount of manpower and material resources and improving work efficiency.

[0118] Combined with Figure 8As shown in the figure, an embodiment of the present disclosure provides a device 80 for controlling a computer room air conditioner, which includes a processor 81 and a memory 82. Optionally, the device may further include a communication interface 83 and a bus 84. Among them, the processor 81, the communication interface 83, and the memory 82 can communicate with each other through the bus 84. The communication interface 83 can be used for information transmission. The processor 81 can call the logical instructions in the memory 82 to execute the method for controlling the computer room air conditioner in the above embodiment.

[0119] In addition, when the logical instructions in the above-mentioned memory 82 are implemented in the form of a software functional unit and sold or used as an independent product, they can be stored in a computer-readable storage medium.

[0120] As a computer-readable storage medium, the memory 82 can be used to store software programs and computer-executable programs, such as the program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 81 executes functional applications and data processing by running the program instructions / modules stored in the memory 82, that is, implements the method for controlling the computer room air conditioner in the above embodiment.

[0121] The memory 82 may include a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store data created according to the use of the terminal device, etc. In addition, the memory 82 may include a high-speed random access memory and may also include a non-volatile memory.

[0122] Combined with Figure 9 As shown in the figure, an embodiment of the present disclosure provides a computer room air conditioner 90, which includes: a computer room air conditioner body, and the above-mentioned device 70(80) for controlling the computer room air conditioner. The device 70(80) for controlling the computer room air conditioner is installed on the computer room air conditioner body. The installation relationship described here is not limited to being placed inside the product, but also includes the installation connection with other components of the product, including but not limited to physical connection, electrical connection, or signal transmission connection, etc. Those skilled in the art can understand that the device 70(80) for controlling the computer room air conditioner can be adapted to a feasible product body, and then implement other feasible embodiments.

[0123] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, and the computer-executable instructions are set to execute the above method for controlling a computer room air conditioner.

[0124] The above computer-readable storage medium can be a transient computer-readable storage medium or a non-transient computer-readable storage medium.

[0125] The technical solutions of the embodiments of the present disclosure may be embodied in the form of a software product. The computer software product is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present disclosure. The foregoing storage medium may be a non-transitory storage medium, including: various media that can store program codes such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs, or may also be a transient storage medium.

[0126] The above description and the drawings fully illustrate the embodiments of the present disclosure, enabling those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, process, and other changes. Embodiments merely represent possible variations. Unless explicitly required, separate components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terms used in this application are only for describing embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to also include the plural forms. Similarly, as used in this application, the term "and / or" refers to any and all possible combinations including one or more of the associated listed items. Additionally, when used in this application, the term "comprise" and its variants "comprises" and / or "comprising" etc. mean the presence of the stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or groupings of these. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of another identical element in the process, method, or device comprising the element. In this document, each embodiment may focus on the differences from other embodiments, and the same or similar parts among the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method parts disclosed in the embodiments, the relevant parts may refer to the description of the method parts.

[0127] Those skilled in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner may depend on the specific application and design constraints of the technical solution. The skilled person can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of the embodiments of the present disclosure. The skilled person can clearly understand that for the convenience and conciseness of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0128] In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units can be merely a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Additionally, the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to implement this embodiment. Additionally, in the embodiments of the present disclosure, the various functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0129] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, a segment of a program, or a portion of code that contains one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions noted in the blocks may occur in a different order than noted in the accompanying drawings. For example, two consecutive blocks may in fact be executed substantially in parallel, or they may sometimes be executed in the reverse order, depending on the functionality involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may in fact be executed substantially in parallel, or they may sometimes be executed in the reverse order, depending on the functionality involved. Each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for controlling a computer room air conditioner, characterized in that, The computer room air conditioner includes: a chilled water unit; the method includes: When the chilled water unit is operating for refrigeration or dehumidification, obtain the real-time outlet air temperatures at multiple preset positions along the height direction of the heat exchanger of the chilled water unit; wherein, the preset positions include: the highest position, the second highest position, and other positions except the highest position and the second highest position; Determine the evacuation requirement of the chilled water unit according to the real-time outlet air temperatures at each preset position; wherein, determining the evacuation requirement of the chilled water unit according to the real-time outlet air temperatures at each preset position includes: calculating the real-time average temperature of the real-time outlet air temperatures at other positions; determining the evacuation requirement of the chilled water unit according to the first real-time outlet air temperature at the highest position, the second real-time outlet air temperature at the second highest position, and the real-time average temperature; Control the operation of the chilled water unit according to the evacuation requirement.

2. The method according to claim 1, characterized in that, The determining the evacuation requirement of the chilled water unit according to the first real-time outlet air temperature at the highest position, the second real-time outlet air temperature at the second highest position, and the real-time average temperature includes: Calculate the first temperature difference between the first real-time outlet air temperature and the real-time average temperature, and the second temperature difference between the second real-time outlet air temperature and the real-time average temperature; When the first temperature difference is greater than or equal to the first temperature threshold, the second temperature difference is greater than or equal to the second temperature threshold, and the first temperature difference is greater than the second temperature difference, determine that the evacuation requirement of the chilled water unit is to be evacuated.

3. The method according to claim 1, characterized in that, The computer room air conditioner further includes: an evacuation valve, provided at the top of the heat exchanger; The controlling the operation of the chilled water unit according to the evacuation requirement includes: When the evacuation requirement is to be evacuated, control the evacuation valve to open; When the evacuation requirement is not to be evacuated, control the evacuation valve to remain closed.

4. The method according to claim 3, characterized in that, The controlling the evacuation valve to open includes: Control the opening rate of the evacuation valve according to the real-time outlet air temperatures at multiple preset positions until the evacuation valve is opened to the maximum opening degree.

5. The method according to claim 4, characterized in that, The controlling the opening rate of the evacuation valve according to the real-time outlet air temperatures at multiple preset positions includes: Calculate the second temperature difference between the second real-time outlet air temperature and the real-time average temperature; The larger the end value of the temperature range where the second temperature difference is located, the greater the opening rate of the evacuation valve.

6. The method according to claim 5, characterized in that, If T3 < Td2 ≤ T4, then control the opening rate of the evacuation valve to be the first rate K1; If T4 < Td2, then control the opening rate of the evacuation valve to be the second rate K2; Wherein, T3 is the third temperature threshold, T4 is the fourth temperature threshold, and K2 > K1.

7. The method according to claim 6, characterized in that, During the process of controlling the evacuation valve to open at the second rate K2, obtain the new real-time outlet air temperatures at each preset position; Calculate the new second temperature difference according to the new real-time outlet air temperatures; Correct the current opening rate of the evacuation valve according to the decreasing rate of the new second temperature difference within the set time period.

8. The method according to claim 7, characterized in that, The faster the new second temperature difference decreases, the greater the degree of correction of the current opening rate.

9. The method according to claim 3, characterized in that, After the controlling the evacuation valve to open, the method further includes: Obtain the current real-time outlet air temperatures at multiple preset positions; Control the switch state of the evacuation valve according to the current real-time outlet air temperatures.

10. The method according to claim 9, characterized in that, The controlling the switch state of the evacuation valve according to the current real-time outlet air temperatures includes: After the evacuation valve is opened to the maximum opening degree, recalculate the real-time average temperature of the real-time air outlet temperature at other positions; Calculate the difference between the current first real-time air outlet temperature and the recalculated real-time average temperature to obtain the current first temperature difference; When the current first temperature difference is greater than the fifth temperature threshold, control the corresponding evacuation valve to remain open; When the current first temperature difference is less than or equal to the fifth temperature threshold, control the corresponding evacuation valve to close.

11. The method according to any one of claims 1 to 10, characterized in that, Before the chiller operates for refrigeration or dehumidification, the method further includes: Control the chiller to operate for air supply; Determine the correction requirements for the air outlet temperature at each preset position; When there is a correction requirement for the air outlet temperature at a preset position that needs to be corrected, correct the air outlet temperature at that preset position; Use the corrected air outlet temperature as the real-time air outlet temperature at that preset position when the chiller operates for refrigeration or dehumidification.

12. The method according to claim 11, characterized in that, The determining the correction requirements for the air outlet temperature at each preset position includes: Calculate the temperature difference between the air outlet temperature at each preset position and the average temperature; When the temperature difference is less than the sixth temperature threshold and greater than the seventh temperature threshold, determine that the correction requirement for the air outlet temperature at the corresponding preset position is not to be corrected; When the temperature difference is greater than or equal to the sixth temperature threshold, or the temperature difference is less than or equal to the seventh temperature threshold, determine that the correction requirement for the air outlet temperature at the corresponding preset position is to be corrected.

13. The method according to claim 11, characterized in that, The correcting the air outlet temperature at that preset position includes: Correct the air outlet temperature at that preset position to the average temperature.

14. A device for controlling a computer room air conditioner, comprising a processor and a memory storing program instructions, characterized in that, The processor is configured to execute the method for controlling a computer room air conditioner according to any one of claims 1 to 13 when running the program instructions.

15. A computer room air conditioner, characterized in that, Including: A computer room air conditioner body; And, The device for controlling a computer room air conditioner according to claim 14, which is installed on the computer room air conditioner body; Wherein, the computer room air conditioner body includes: a chiller; The chiller includes: a heat exchanger.

16. A storage medium storing program instructions, characterized in that, When the program instructions are running, execute the method for controlling a computer room air conditioner according to any one of claims 1 to 13.

Images