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

Abstract

The present application relates to the field of air conditioning technology and discloses a method for controlling a computer room air conditioner, wherein the computer room air conditioner includes: multiple chilled water units; the method includes: obtaining the inlet water temperature and outlet water temperature of each chilled water unit; determining a target chilled water unit based on the inlet water temperature and outlet water temperature; determining the emptying requirement of the target chilled water unit; and controlling the operation of the target chilled water unit based on the emptying requirement. In this way, the determination of the emptying requirement and the execution of the emptying action can be achieved without making significant structural improvements to the chilled water unit, which greatly saves costs. Furthermore, there is no need to manually check for chilled water units that need to be emptied and operate the emptying, which saves a lot of manpower and material resources and improves 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] The present application relates to the field of air conditioning technology, for example, to a method, device, computer room air conditioner and storage medium for controlling a computer room air conditioner. Background Art

[0002] Chilled water room air conditioners are widely used in data centers to cool the numerous electronic devices and components within them. These systems utilize chilled water as a cooling source and require peripheral equipment such as a chiller and chilled water piping, resulting in a large overall system. During initial installation and operation, the internal liquid vaporizes. Air or other non-condensable gases accumulate in the system, accumulating in pipes and heat exchangers. When these accumulate to a sufficient level, they can cause blockage in the heat exchanger, compromising the overall cooling performance of the system.

[0003] The related technology discloses a heat exchanger with an exhaust function, including a heat exchange chamber and several heat exchange pipes arranged through the heat exchange chamber, a hot side inlet and a hot side outlet are provided on one side of the heat exchange chamber, and a cold side inlet and a cold side outlet are provided on the other side of the heat exchange chamber; several partition plates are fixedly installed on the top of the heat exchange chamber, and flow channels are formed between the partition plates. Exhaust holes are also provided on the partition plates, and an exhaust pipe is also connected to the top of the heat exchange chamber.

[0004] During the implementation of the embodiments of the present disclosure, it was found that at least the following problems exist in the related art:

[0005] Related technologies avoid gas blockage by improving the structure of the heat exchanger, but the cost is relatively high.

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

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] Embodiments of the present disclosure provide a method, apparatus, computer room air conditioner, and storage medium for controlling a computer room air conditioner, so as to reduce the cost of avoiding air blockage.

[0009] In some embodiments, the computer room air conditioner includes: multiple chilled water units; the method for controlling the computer room air conditioner includes: obtaining the inlet water temperature and outlet water temperature of each chilled water unit; determining the target chilled water unit based on the inlet water temperature and outlet water temperature; determining the emptying requirement of the target chilled water unit; and controlling the operation of the target chilled water unit based on the emptying requirement.

[0010] In some embodiments, the apparatus for controlling a 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 a 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; the aforementioned device for controlling the computer room air conditioner is installed on the computer room air conditioner body; wherein the computer room air conditioner body includes: multiple chilled water units.

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

[0013] The method, device, computer room air conditioner, and storage medium for controlling a computer room air conditioner provided in the embodiments of the present disclosure can achieve the following technical effects:

[0014] The target chiller, or chiller, is identified by measuring the inlet and outlet temperatures of each chiller. The target chiller's draining requirements are then determined to eliminate any interference that could affect draining decisions. The target chiller's operation is then controlled based on the draining requirements. When a target chiller requires draining, it is automatically drained. This eliminates the need for extensive structural modifications to the chiller, achieving both draining requirements and execution, significantly reducing costs. Furthermore, there's no need to manually identify and drain chillers, saving significant manpower and resources while improving efficiency.

[0015] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0017] Figure 1 is a structural diagram of a computer room air conditioner provided by an embodiment of the present disclosure;

[0018] Figure 2 is a schematic diagram of a method for controlling a computer room air conditioner provided by an embodiment of the present disclosure;

[0019] Figure 3 is a schematic diagram of another method for controlling a computer room air conditioner provided by an embodiment of the present disclosure;

[0020] Figure 4 is a schematic diagram of another method for controlling a computer room air conditioner provided by an embodiment of the present disclosure;

[0021] Figure 5 is a schematic diagram of another method for controlling a computer room air conditioner provided by an embodiment of the present disclosure;

[0022] Figure 6 is a schematic diagram of another method for controlling a computer room air conditioner provided by an embodiment of the present disclosure;

[0023] Figure 7 is a schematic diagram of a device for controlling a computer room air conditioner provided by an embodiment of the present disclosure;

[0024] Figure 8 is a schematic diagram of another device for controlling a computer room air conditioner provided by an embodiment of the present disclosure;

[0025] Figure 9 Schematic diagram of a computer room air conditioner provided in an embodiment of the present disclosure.

[0026] Reference numerals:

[0027] 1. Main water supply pipeline; 2. Main return water pipeline; 3. Chiller; 31. Heat exchanger; 32. Chilled water inlet pipe; 33. Chilled water outlet pipe; 34. First temperature sensor; 35. Second temperature sensor; 36. Flow control valve; 37. Drain valve. DETAILED DESCRIPTION

[0028] 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 is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0029] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0030] Unless otherwise stated, the term "plurality" means two or more.

[0031] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0032] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0033] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0034] Combine Figure 1 As shown, an embodiment of the present disclosure provides 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 return water 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 connected to the main water supply pipeline 1, and the second end is connected to the water inlet of the corresponding heat exchanger 31. The first end of the chilled water outlet pipe 33 is connected to the main return water pipeline 2, and the second end is connected to the water outlet of the corresponding heat exchanger 31.

[0035] Each chilled water inlet pipe 32 is provided with a first temperature sensor 34 to obtain the inlet water temperature of the corresponding chilled water unit 3. Each chilled water outlet pipe 33 is provided with a second temperature sensor 35 to obtain the outlet water temperature of the corresponding chilled water unit 3.

[0036] Each chiller unit 3 also includes a flow control valve 36 and a drain valve 37. The flow control valve 36 is located on the 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 rate. The drain valve 37 is located at the top of the corresponding heat exchanger 31. The drain valve 37 is a solenoid valve. When the solenoid coil is energized, the valve body opens, allowing the non-condensable gas in the corresponding heat exchanger 31 to be discharged.

[0037] The computer room air conditioner further includes a processor that is in communication with the first temperature sensor 34 , the second temperature sensor 35 , the flow control valve 36 , and the drain valve 37 , so as to obtain corresponding temperatures from the first temperature sensor 34 and the second temperature sensor 35 and thereby control the flow control valve 36 and the drain valve 37 .

[0038] Combine Figure 2 As shown, an embodiment of the present disclosure provides a method for controlling a computer room air conditioner, comprising:

[0039] S201: The computer room air conditioner obtains the inlet water temperature and outlet water temperature of each chiller unit.

[0040] S202: The computer room air conditioner determines a target chilled water unit based on the inlet water temperature and the outlet water temperature.

[0041] S203: The computer room air conditioner determines the emptying requirement of the target chilled water unit.

[0042] In step S204, the computer room air conditioner controls the operation of the target chilled water unit according to the emptying demand.

[0043] The inlet water temperature Tj of each chiller is obtained through a first temperature sensor, and the outlet water temperature Tc of each chiller is obtained through a second temperature difference sensor. The target chiller is determined based on the inlet and outlet water temperatures. Due to certain factors, the temperature detection may not accurately reflect the necessity of emptying. Therefore, the target chiller determined here may need to be emptied. Therefore, the emptying requirement of the target chiller is further determined. Here, the purpose is to determine whether the target chiller needs to be emptied. Then, based on the emptying requirement, the operation of the target chiller is controlled to control whether the chiller performs the emptying action. The target chiller can be one or more chillers.

[0044] Using the method for controlling a computer room air conditioner provided by the embodiment of the present disclosure, the target chilled water unit is determined based on the inlet and outlet water temperatures of each chilled water unit, that is, the chilled water unit that may need to be emptied. The emptying requirement of the target chilled water unit is then further determined to eliminate interference factors that affect the emptying judgment. The operation of the target chilled water unit is then controlled based on the emptying requirement. When the target chilled water unit needs to be emptied, the target chilled water unit is controlled to automatically perform the emptying action. In this way, the determination of the emptying requirement and the execution of the emptying action can be achieved without making significant improvements to the structure of the chilled water unit, which greatly saves costs. In addition, there is no need to manually check the chilled water units that need to be emptied and operate the emptying, which saves a lot of manpower and material resources and improves work efficiency.

[0045] Combine Figure 3 As shown, an embodiment of the present disclosure provides another method for controlling a computer room air conditioner, including:

[0046] S201: The computer room air conditioner obtains the inlet water temperature and outlet water temperature of each chiller unit.

[0047] S212, the computer room air conditioner calculates the average water inlet temperature and average water outlet temperature of all chilled water units.

[0048] S222: The computer room air conditioner calculates an average inlet and outlet water temperature difference based on the average outlet water temperature and the average inlet water temperature, and calculates an inlet and outlet water temperature difference of a single chiller unit based on the outlet water temperature and inlet water temperature of each chiller unit.

[0049] S232: The computer room air conditioner determines the target chilled water unit based on the average inlet and outlet water temperature difference and the inlet and outlet water temperature difference of a single unit.

[0050] S203: The computer room air conditioner determines the emptying requirement of the target chilled water unit.

[0051] In step S204, the computer room air conditioner controls the operation of the target chilled water unit according to the emptying demand.

[0052] Calculate the average water inlet temperature of all chillers according to formula (1):

[0053] Tjp=(Tj1+Tj2+…+Tjn) / n (1)

[0054] Where n is the number of chilled water units, Tjn is the inlet water temperature of the nth chilled water unit, and Tjp is the average inlet water temperature of n chilled water units.

[0055] Calculate the average outlet water temperature of all chillers according to formula (2):

[0056] Tcp=(Tc1+Tc2+…+Tcn) / n (2)

[0057] Where Tcn is the outlet water temperature of the nth chiller, and Tcp is the average outlet water temperature of n chillers.

[0058] Calculate the average inlet and outlet water temperature difference according to formula (3):

[0059] ΔTp=(Tcp-Tjp) (3)

[0060] Where ΔTp is the average inlet and outlet water temperature difference.

[0061] Calculate the inlet and outlet water temperature difference of a single unit according to formula (4):

[0062] ΔTn=(Tcn-Tjn) (4)

[0063] Wherein, ΔTn is the temperature difference between the inlet and outlet water of the nth chiller unit.

[0064] After calculation, an average inlet and outlet water temperature difference ΔTp and multiple single-unit inlet and outlet water temperature differences ΔTn can be obtained, and each ΔTn corresponds to a chilled water unit.

[0065] Based on the average inlet and outlet water temperature difference ΔTp and the inlet and outlet water temperature differences ΔTn of each single unit, the target chilled water unit is determined. Optionally, compare the gap between ΔTp and ΔTn. The greater the difference between the two, the more the inlet and outlet water temperature difference of a certain chilled water unit deviates from the average value, so it is possible that this chilled water unit needs to be emptied. Then, this chilled water unit is determined as the target chilled water unit.

[0066] In this way, based on the inlet and outlet water temperature difference of a single unit and the average inlet and outlet water temperature difference, it can be determined whether the inlet and outlet water temperature difference of each chilled water unit deviates too much from the average value, and then the target chilled water unit can be determined to further determine the emptying requirement of the target chilled water.

[0067] Optionally, in step S232, the computer room air conditioner determines the target chilled water unit according to the average inlet and outlet water temperature difference and the inlet and outlet water temperature difference of a single unit, including:

[0068] The computer room air conditioner calculates the temperature difference between the inlet and outlet water temperature difference of each single unit and the average inlet and outlet water temperature difference.

[0069] The computer room air conditioner determines the chilled water unit corresponding to the temperature difference greater than or equal to the first temperature difference threshold as the target chilled water unit.

[0070] Calculate the temperature difference between the inlet and outlet water temperature difference of each single unit and the average inlet and outlet water temperature difference according to formula (5):

[0071] ΔSn = (ΔTn - ΔTp) (5)

[0072] Among them, ΔSn is the temperature difference between the inlet and outlet water temperature difference of the nth chilled water unit and the average inlet and outlet water temperature difference.

[0073] In this way, multiple temperature differences ΔSn can be obtained, and each temperature difference ΔSn corresponds to a chilled water unit. Set the first temperature difference threshold T1, T1 > 0, and pre-store it in the processor of the computer room air conditioner. Compare the magnitudes of ΔSn and T1. If ΔSn ≥ T1, it means that the inlet and outlet water temperature difference of the chilled water unit corresponding to ΔSn deviates more from the average inlet and outlet water temperature difference, and it is very likely that it needs to be emptied. Therefore, this chilled water is determined as the target chilled water unit. For example, if ΔS1 ≥ T1, and ΔS1 is the temperature difference between the inlet and outlet water temperature difference of the first chilled water unit and the average inlet and outlet water temperature difference, so ΔS1 corresponds to the first chilled water unit, and thus the first chilled water unit is determined as the target chilled water unit. Another example is that if ΔS2 < T1, then the second chilled water unit is a non-target chilled water unit.

[0074] Combination Figure 4 As shown, an embodiment of the present disclosure provides another method for controlling a computer room air conditioner, including:

[0075] S201, the computer room air conditioner obtains the inlet water temperature and outlet water temperature of each chiller unit.

[0076] S202, the computer room air conditioner determines the target chiller unit according to the inlet water temperature and the outlet water temperature.

[0077] S213, the computer room air conditioner controls the opening degree of the flow regulating valve corresponding to the target chiller unit to the maximum.

[0078] S223, when the real-time temperature difference of the target chiller unit is greater than or equal to the second temperature difference threshold, the computer room air conditioner determines that the evacuation requirement of the target chiller unit is to be evacuated.

[0079] S204, the computer room air conditioner controls the operation of the target chiller unit according to the evacuation requirement.

[0080] After determining the target chiller unit, control the opening degree of the flow regulating valve corresponding to the target chiller unit to the maximum opening degree so that the water output of the target chiller unit reaches the maximum. After a preset time period, recalculate the real-time temperature difference ΔSn' according to the formula (5) described above. Optionally, determine the preset time period according to the indoor return air temperature. If the indoor return air temperature is greater than the preset temperature, determine that the preset time period is the first time period t1. If the indoor return air temperature is less than or equal to the preset temperature, determine that the preset time period is the second time period t2. Among them, t1 < t2. Optionally, t1 is 1 hour and t2 is 1.5 hours. The preset temperature is 30 °C. This is because the higher the indoor return air temperature, the greater the heat exchange amount of the corresponding heat exchanger, and the shorter the detection time period of the corresponding inlet and outlet water temperature difference can be.

[0081] Set the second temperature difference threshold T2, T2 > 0, and store it in the processor of the computer room air conditioner in advance. Compare the magnitudes of ΔSn' and T2.

[0082] If ΔSn' < T2, it means that due to the flow regulating valve of the target chiller unit not being adjusted in place, the previously calculated ΔSn is greater than or equal to T1. After controlling the flow regulating valve to open to the maximum opening degree, the single-unit inlet and outlet water temperature difference of the target chiller unit is close to the current average inlet and outlet water temperature difference, that is, within the normal range, then determine that the evacuation requirement of the target chiller unit is not to be evacuated.

[0083] If ΔSn’≥T2, that is, even when the flow regulating valve is fully opened, the temperature difference between the inlet and outlet of a single unit of the target chilled water unit still deviates significantly from the average temperature difference between the inlet and outlet. At this time, it is determined that there is an excessive amount of non-condensable gas in the target chilled water unit, and there is an air blockage phenomenon in the corresponding heat exchanger. Therefore, it is determined that the evacuation requirement of the target chilled water unit is to be evacuated.

[0084] In this way, after determining the target chilled water unit, first control the opening of the flow regulating valve corresponding to the target chilled water unit to the maximum opening, and then recalculate the real-time temperature difference between the temperature difference between the inlet and outlet of a single unit of the target chilled water unit and the average temperature difference between the inlet and outlet. Based on the real-time temperature difference, determine whether the target chilled water unit needs to be evacuated. In this way, the influence of the flow regulating valve not being fully opened on the accuracy of the evacuation judgment result is eliminated, so as to accurately determine the evacuation requirement of the target chilled water unit.

[0085] Optionally, during the process of the computer room air conditioner controlling the flow regulating valve to be fully opened, the opening rate of the flow regulating valve is controlled according to the temperature difference ΔSn corresponding to the target chiller unit. For example, when controlling the flow regulating valve of the second chilled water unit to be fully opened, the opening rate of the flow regulating valve is controlled according to ΔS2. Optionally, the larger the temperature difference ΔSn, the greater the opening rate. Specifically, if T1≤ΔSn<T4, then control the flow regulating valve to open at the first rate K1. If ΔSn≥T4, then control the flow regulating valve to open at the second rate K2. Among them, T4 is the fourth temperature difference threshold, and K1<K2. Optionally, T4 = 1.5T1, K2 = 2K1. [[ID=�]]

[0086] Optionally, during the process of the computer room air conditioner controlling the flow regulating valve to open at the second rate K2, the current opening rate of the flow regulating valve is corrected according to the change of the corresponding temperature difference ΔTn between the inlet and outlet of a single unit. This is because when the flow regulating valve opens at the second rate, its opening rate is relatively fast. If the temperature difference ΔTn between the inlet and outlet of a single unit also changes too fast, it is easy to cause overshoot, so the current opening rate needs to be corrected. Optionally, the faster ΔTn drops, the greater the degree of correction of the current opening rate.

[0087] Specifically, the rate of decrease of ΔTn 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. Among them, K1<K4<K3<K2. Optionally, K3 = 1.7K1, K4 = 1.3K1. Among them, V1 is the first rate threshold, V2 is the second rate threshold, and V3 is the third rate threshold.

[0088] Optionally, in combination with Figure 5 As shown, an embodiment of the present disclosure provides another method for controlling a computer room air conditioner, including:

[0089] S201, the computer room air conditioner obtains the inlet water temperature and outlet water temperature of each chiller unit.

[0090] S202, the computer room air conditioner determines the target chiller unit according to the inlet water temperature and outlet water temperature.

[0091] S203, the computer room air conditioner determines the evacuation requirement of the target chiller unit.

[0092] S214, when the evacuation requirement is that evacuation is needed, the computer room air conditioner controls the evacuation valve corresponding to the target chiller unit to open.

[0093] If it is determined that the evacuation requirement of the target chiller unit is that evacuation is needed, then control the evacuation valve corresponding to the target chiller unit to open to discharge the non-condensable gas. At the same time, control the corresponding flow regulating valve to maintain the maximum opening. For example, if the target chiller unit is the third chiller unit and evacuation is needed, then control the evacuation valve corresponding to the third chiller unit to open. At the same time, control the flow regulating valve of the third chiller unit to maintain the maximum opening.

[0094] Optionally, during the process of controlling the evacuation valve to open, according to the recalculated real-time temperature difference ΔSn’ corresponding to the target chiller unit, control the opening rate of the evacuation valve. For example, when controlling the evacuation valve of the third chiller unit to open, control the opening rate of this evacuation valve according to ΔS3’, until it is opened to its maximum opening. Optionally, the greater the real-time temperature difference ΔSn’, the greater the opening rate, so as to evacuate the non-condensable gas as soon as possible. Specifically, if T2≤ΔSn’<T5, then control the evacuation valve to open at the first opening rate M1. If ΔSn’ ≥ ≥T5, then control the evacuation valve to open at the second opening rate M2. Wherein, T5 is the fifth temperature difference threshold, and M2>M1. Optionally, T5 = 1.5T2, M2 = 2M1.

[0095] Optionally, during the process of controlling the evacuation valve to open at the second opening rate M2, according to the change condition of the corresponding current temperature difference ΔTn between the inlet and outlet water of a single unit, correct the current opening rate of the evacuation valve. This is because when the evacuation valve opens at the second opening rate, its opening rate is relatively fast. If the current temperature difference ΔTn between the inlet and outlet water of a single unit also changes too fast, it is easy to cause overshoot, so the current opening rate needs to be corrected. Optionally, the faster ΔTn drops, the greater the degree of correction of the current opening rate.

[0096] Specifically, the decreasing rate of ΔTn is ΔW. If ΔW ≤ W1, the current starting rate is not corrected. If W1 < ΔW ≤ W2, the current starting rate is corrected to the third starting rate M3; if W2 < ΔW ≤ W3, the current starting rate is corrected to the fourth starting rate M4. If W3 < ΔW, the current starting rate is corrected to the first starting rate M1. Here, M1 < M4 < M3 < M2. Optionally, M3 = 1.7M1 and M4 = 1.3M1. Here, W1 is the first starting rate threshold, W2 is the second starting rate threshold, and W3 is the third starting rate threshold.

[0097] Optionally, in combination Figure 6 As shown, the embodiments of the present disclosure provide another method for controlling a computer room air conditioner, including:

[0098] S201, the computer room air conditioner obtains the inlet temperature and outlet temperature of each chiller unit.

[0099] S202, the computer room air conditioner determines the target chiller unit according to the inlet temperature and outlet temperature.

[0100] S203, the computer room air conditioner determines the evacuation requirement of the target chiller unit.

[0101] S214, when the evacuation requirement is to be evacuated, the computer room air conditioner controls the evacuation valve corresponding to the target chiller unit to open.

[0102] S205, the computer room air conditioner calculates the temperature difference between the inlet and outlet of the current single chiller unit according to the current outlet temperature and inlet temperature of the target chiller unit.

[0103] S206, the computer room air conditioner calculates the average temperature difference between the inlet and outlet of all chiller units according to the current average outlet temperature and current average inlet temperature of all chiller units.

[0104] S207, the computer room air conditioner calculates the current real-time temperature difference according to the current temperature difference between the inlet and outlet of the single chiller unit and the current average temperature difference between the inlet and outlet.

[0105] S208, when the current real-time temperature difference is less than or equal to the third temperature difference threshold, the computer room air conditioner controls the corresponding evacuation valve to close.

[0106] After the drain valve is controlled to open, the current outlet water temperature and inlet water temperature of the target chiller are substituted into the aforementioned formula (4) to recalculate the current inlet and outlet water temperature difference of the target chiller. The current average outlet water temperature and the current average inlet water temperature of all chillers are substituted into the aforementioned formula (3) to recalculate the current average inlet and outlet water temperature difference of all chillers. The current inlet and outlet water temperature difference of a single unit and the current average inlet and outlet water temperature difference are substituted into the aforementioned formula (5) to recalculate the current real-time temperature difference ΔSn".

[0107] Set a third temperature difference threshold value T3, T3<0, and pre-store it in the processor of the computer room air conditioner. Compare the sizes of ΔSn” and T3. If ΔSn”>T3, control the corresponding drain valve to remain open. If ΔSn”≤T3, it indicates that the non-condensable gas of the corresponding target chilled water unit has been discharged, then control the corresponding drain valve to close to complete the draining action of the target chilled water unit. At the same time, control the opening of the corresponding flow regulating valve to adjust according to the cooling demand. For example, ΔS3”≤T3, ΔS3 corresponds to the third chilled water unit, then control the drain valve of the third chilled water unit to close. At the same time, control the flow regulating valve of the third chilled water unit to adjust according to the cooling demand.

[0108] After the target chiller is completely drained, the corresponding heat exchanger can continue to operate at a high-efficiency heat exchange state, thereby improving the overall cooling effect of the computer room air conditioner.

[0109] Combine Figure 7 As shown, an embodiment of the present disclosure provides an apparatus 70 for controlling a computer room air conditioner, comprising: an acquisition module 71, a first determination module 72, a second determination module 73, and a control module 74. Acquisition module 71 is configured to acquire the inlet and outlet water temperatures of each chilled water unit. First determination module 72 is configured to determine a target chilled water unit based on the inlet and outlet water temperatures. Second determination module 73 is configured to determine the emptying requirement of the target chilled water unit. Control module 74 is configured to control the operation of the target chilled water unit based on the emptying requirement.

[0110] By using the device for controlling a computer room air conditioner provided by the embodiment of the present disclosure, the target chilled water unit is determined based on the inlet and outlet water temperatures of each chilled water unit, that is, the chilled water unit that may need to be emptied. The emptying requirement of the target chilled water unit is then further determined to eliminate interference factors that affect the emptying judgment. The operation of the target chilled water unit is then controlled based on the emptying requirement. When the target chilled water unit needs to be emptied, the target chilled water unit is controlled to automatically perform the emptying action. In this way, the determination of the emptying requirement and the execution of the emptying action can be achieved without making a large number of improvements to the structure of the chilled water unit, which greatly saves costs. In addition, there is no need to manually check the chilled water units that need to be emptied and operate the emptying, which saves a lot of manpower and material resources and improves work efficiency.

[0111] Combine Figure 8 As shown, an embodiment of the present disclosure provides a device 80 for controlling a computer room air conditioner, comprising a processor 81 and a memory 82. Optionally, the device may further comprise a communication interface 83 and a bus 84. The processor 81, the communication interface 83, and the memory 82 may communicate with each other via the bus 84. The communication interface 83 may be used for information transmission. The processor 81 may invoke logic instructions in the memory 82 to execute the method for controlling a computer room air conditioner of the above embodiment.

[0112] In addition, the logic instructions in the memory 82 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0113] Memory 82, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as the program instructions / modules corresponding to the methods in the embodiments of the present disclosure. Processor 81 executes the program instructions / modules stored in memory 82 to execute functional applications and process data, thereby implementing the method for controlling a computer room air conditioner in the above-described embodiments.

[0114] The memory 82 may include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function; the data storage area may store data generated based on the use of the terminal device. Furthermore, the memory 82 may include high-speed random access memory and non-volatile memory.

[0115] Combine Figure 9As shown, an embodiment of the present disclosure provides a computer room air conditioner 90, comprising: 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 placement inside the product, but also includes installation connections with other components of the product, including but not limited to physical connections, electrical connections or signal transmission connections. It can be understood by those skilled in the art that the device 70 (80) for controlling the computer room air conditioner can be adapted to a feasible product body, thereby realizing other feasible embodiments.

[0116] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for controlling a computer room air conditioner.

[0117] The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0118] The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, which 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 method described in the embodiments of the present disclosure. The aforementioned storage medium may be a non-transitory storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program code, or a transient storage medium.

[0119] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible variations. Unless explicitly required, individual 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 words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to also include plural forms. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listings. In addition, when used in this application, the term "comprise" and its variations "comprises" and / or comprising refer to the presence of 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 groups of these. In the absence of further restrictions, an element defined by the sentence "comprising a..." does not exclude the presence of other identical elements in the process, method or device that includes the element. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments can be referenced to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can be found in the description of the method part.

[0120] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. The technicians will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0121] In the embodiments disclosed herein, the disclosed methods and 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 functional division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, and can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected to implement this embodiment according to actual needs. In addition, the functional units in the embodiments of the present disclosure may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0122] The flowcharts and block diagrams in the accompanying drawings show the possible implementation architectures, functions and operations of the systems, methods and computer program products according to the embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment or part of the code, and the module, program segment or part of the code contains one or more executable instructions for implementing the specified logical functions. In some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in an order different from that disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified function or action, or may 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 comprises: a plurality of chilled water units; the method comprises: Get the inlet and outlet water temperatures of each chiller; Determining a target chilled water unit based on the inlet water temperature and the outlet water temperature; wherein determining the target chilled water unit based on the inlet water temperature and the outlet water temperature includes: calculating the average inlet water temperature and the average outlet water temperature of all chilled water units; calculating the average inlet and outlet water temperature difference based on the average outlet water temperature and the average inlet water temperature, and calculating the inlet and outlet water temperature difference of a single chilled water unit based on the outlet water temperature and the inlet water temperature of each chilled water unit; determining the target chilled water unit based on the average inlet and outlet water temperature difference and the inlet and outlet water temperature difference of the single chilled water unit; the target chilled water unit is a chilled water unit that may need to be emptied; Determine the emptying requirements of the target chiller; Control the operation of the target chiller according to the emptying requirements.

2. The method according to claim 1, characterized in that Determining the target chiller unit based on the average inlet and outlet water temperature difference and the inlet and outlet water temperature difference of a single unit includes: Calculate the temperature difference between the inlet and outlet water temperature difference of each single unit and the average inlet and outlet water temperature difference; The chilled water unit corresponding to the temperature difference greater than or equal to the first temperature difference threshold is determined as the target chilled water unit.

3. The method according to claim 2, characterized in that The computer room air conditioner further comprises: a plurality of flow regulating valves, corresponding one to each chiller unit and arranged on the water outlet side of the corresponding chiller unit; Determining the emptying requirement of the target chiller unit includes: Control the flow control valve corresponding to the target chiller unit to open to the maximum; When the real-time temperature difference of the target chilled water unit is greater than or equal to the second temperature difference threshold, it is determined that the emptying requirement of the target chilled water unit is that emptying is required.

4. The method according to any one of claims 1 to 3, characterized in that The computer room air conditioner further comprises: a plurality of drain valves corresponding to each chiller unit and arranged on the top of the heat exchanger of the corresponding chiller unit; The controlling the operation of the target chiller unit according to the emptying requirement includes: When the emptying demand is that emptying is required, the emptying valve corresponding to the target chiller unit is controlled to open.

5. The method according to claim 4, characterized in that The method further comprises: In the process of controlling the opening of the drain valve, the opening rate of the drain valve is controlled according to the real-time temperature difference value corresponding to the target refrigeration unit that is recalculated.

6. The method according to claim 5, characterized in that The controlling of the opening rate of the drain valve according to the real-time temperature difference value corresponding to the target refrigeration unit obtained by recalculation includes: The larger the recalculated real-time temperature difference is, the greater the opening rate of the drain valve is.

7. The method according to claim 5, characterized in that The controlling of the opening rate of the drain valve according to the real-time temperature difference value corresponding to the target refrigeration unit obtained by recalculation includes: If the recalculated real-time temperature difference is less than the fifth temperature difference threshold and greater than or equal to the second temperature difference threshold, controlling the drain valve to open at the first opening rate; If the recalculated real-time temperature difference is greater than or equal to a fifth temperature difference threshold, controlling the drain valve to open at a second rate; The second opening rate is greater than the first opening rate.

8. The method according to claim 7, characterized in that The method of controlling the opening rate of the drain valve according to the real-time temperature difference value corresponding to the target refrigeration unit after recalculation may further include: In the process of controlling the drain valve to open at the second opening rate, the current opening rate of the drain valve is corrected according to the change of the inlet and outlet water temperature difference of the corresponding single unit.

9. The method according to claim 8, characterized in that The method of correcting the current opening rate of the drain valve according to the change in the inlet and outlet water temperature difference of the corresponding single unit includes: The faster the current inlet and outlet water temperature difference of a single unit decreases, the greater the degree of correction to the current opening rate.

10. The method according to claim 4, characterized in that After controlling the drain valve corresponding to the target chiller to open, the method further includes: Calculate the current inlet and outlet water temperature difference of a single unit of the target chiller based on the current outlet and inlet water temperatures of the target chiller. Calculate the current average inlet and outlet water temperature difference of all chilled water units based on the current average outlet water temperature and the current average inlet water temperature of all chilled water units; Calculate the current real-time temperature difference based on the current inlet and outlet water temperature difference of a single unit and the current average inlet and outlet water temperature difference; When the current real-time temperature difference is less than or equal to the third temperature difference threshold, the corresponding drain valve is controlled to be closed.

11. The method according to claim 3, characterized in that After the flow control valve is controlled to be opened to the maximum, determining the emptying requirement of the target chiller unit further includes: When the real-time temperature difference of the target chilled water unit is less than the second temperature difference threshold, it is determined that the emptying requirement of the target chilled water unit does not require emptying.

12. 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 11 when running the program instructions.

13. A computer room air conditioner, characterized in that: include: Computer room air conditioner body; and, The device for controlling a computer room air conditioner according to claim 12, being installed on the computer room air conditioner body; Among them, the computer room air conditioning body includes: multiple chilled water units.

14. A storage medium storing program instructions, characterized in that: When the program instructions are executed, the method for controlling a computer room air conditioner according to any one of claims 1 to 11 is executed.

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