Cooling control device and control method of DC cabin based on water system

Abstract

The invention discloses a cooling control device and method for a DC cabin based on a water system. A plate heat exchanger is connected with a first electric valve, a second electric valve, a fifth electric valve and a sixth electric valve. The cold water main machine is respectively connected with a third electric valve, a fourth electric valve, a seventh electric valve and an eighth electric valve; the ninth electric valve is respectively connected with a cooling water pump and a chilled water pump; the tenth electric valve is respectively connected with water outlet pipes of the cooling tower and the air conditioner; the first electric valve and the third electric valve are respectively connected with the cooling water pump; the second electric valve and the fourth electric valve are respectively connected with the cooling tower; the fifth electric valve, the seventh electric valve and the ninth electric valve are respectively connected with a chilled water pump; the sixth electric valve, the eighth electric valve and the tenth electric valve are respectively connected with a water outlet pipe of an air conditioner; the cooling water pump is also connected with the cooling tower; the chilled water pump is connected with a water inlet pipe of the air conditioner; and adjustment is conducted according to the current outdoor temperature, so that the cooling control device operates in different cold supply modes.

Description

Technical Field

[0001] The present application relates to the field of energy-saving technology, and in particular to a cooling control device and a control method for a DC compartment based on a water system. Background Art

[0002] The data center (DC) cabin is a system composed of cabinets, air conditioners, power distribution cabinets and other equipment, which provides a suitable temperature and humidity environment for the normal operation of electronic equipment.

[0003] In the related art, there are several ways to cool the DC cabin: first, the air-conditioning system mainly uses mechanical compression refrigeration, which runs uninterruptedly throughout the year and consumes a lot of electricity; second, the cold water host is relied on to provide low-temperature chilled water for the inter-row air conditioners uninterruptedly throughout the year, resulting in energy waste; third, the DC cabin is located near the lake or the sea to utilize natural cold sources, but the site selection requirements are high.

[0004] Therefore, there is an urgent need for an efficient, practical, flexible and energy-saving cooling method. Summary of the invention

[0005] In an exemplary embodiment of the present application, a cooling control device and a control method for a DC cabin based on a water system are provided, which are used to improve the efficiency of the DC cabin cooling process, save power consumption, and fully utilize the natural cold source by flexibly switching the cooling mode.

[0006] According to a first aspect of an exemplary embodiment, there is provided a cooling control device for a DC compartment based on a water system, comprising: a cooling tower, a cooling water pump, a chiller, a chilled water pump, a plate heat exchanger, and at least one electric valve;

[0007] The plate heat exchanger is connected to the first electric valve, the second electric valve, the fifth electric valve and the sixth electric valve respectively; the chiller is connected to the third electric valve, the fourth electric valve, the seventh electric valve and the eighth electric valve respectively; the ninth electric valve is connected to the cooling water pump and the freezing water pump respectively; the tenth electric valve is connected to the outlet pipes of the cooling tower and the air conditioner of the DC cabin respectively; the first electric valve and the third electric valve are also connected to the cooling water pump respectively; the second electric valve and the fourth electric valve are also connected to the cooling tower respectively; the fifth electric valve, the seventh electric valve and the ninth electric valve are also connected to the freezing water pump respectively; the sixth electric valve, the eighth electric valve and the tenth electric valve are also connected to the outlet pipes of the air conditioner of the DC cabin respectively; the cooling water pump is also connected to the cooling tower;

[0008] The chilled water pump is also connected to the water inlet pipe of the air conditioner in the DC cabin; according to the current outdoor temperature, the opening and closing states of the cooling tower, the cooling water pump, the chilled water main unit, the chilled water pump, the plate heat exchanger and at least one electric valve are controlled to enable the cooling control device to operate in different cooling modes; wherein the cooling modes include cooling tower indirect cooling mode, cooling tower direct cooling mode, cooling tower and chilled water main unit mixed cooling mode and mechanical compression cooling mode.

[0009] According to a second aspect of an exemplary embodiment, a cooling control method for a DC compartment based on a water system is provided, which is applied to the cooling control device of the first aspect, and the method includes:

[0010] When the current outdoor temperature meets the natural cooling conditions, if the cooling tower is a closed cooling tower, the cooling control device is controlled to operate in the cooling tower direct cooling mode; if the cooling tower is an open cooling tower, the cooling control device is controlled to operate in the cooling tower indirect cooling mode;

[0011] When the current outdoor temperature does not meet the natural cooling conditions, if the current outdoor temperature meets the set transitional season conditions, the cooling control device is controlled to operate in a mixed cooling mode of the cooling tower and the chiller, otherwise the cooling control device is controlled to operate in a mechanical compression cooling mode.

[0012] According to a third aspect of an exemplary embodiment, a controller is provided, the controller being integrated in the cooling control device of the first aspect, the controller comprising:

[0013] An acquisition unit, used to: acquire the current outdoor temperature;

[0014] The processing unit is used to: when the current outdoor temperature meets the natural cooling condition, if the cooling tower is a closed cooling tower, control the cooling control device to operate in the cooling tower direct cooling mode; if the cooling tower is an open cooling tower, control the cooling control device to operate in the cooling tower indirect cooling mode;

[0015] The processing unit is used to: when the current outdoor temperature does not meet the natural cooling conditions, if the current outdoor temperature meets the set transition season conditions, control the cooling control device to operate in a mixed cooling mode of the cooling tower and the chiller; otherwise, control the cooling control device to operate in a mechanical compression cooling mode.

[0016] According to a fourth aspect of an exemplary embodiment, a computer storage medium is provided, in which computer program instructions are stored. When the instructions are executed on a computer, the computer executes the cooling control method for a DC compartment based on a water system as in the second aspect.

[0017] In the embodiment of the present application, by adding components such as pipelines, electric valves and plate heat exchangers that utilize natural cold sources, the cooling tower, cooling water pump, chiller and refrigerated water pump are connected to the pipelines, electric valves and plate heat exchangers, and then the opening and closing states of the cooling tower, cooling water pump, chiller, refrigerated water pump, plate heat exchanger and at least one electric valve can be controlled according to the current outdoor temperature, so that the cooling control device operates in different cooling modes. The cooling modes include cooling tower indirect cooling mode, cooling tower direct cooling mode, cooling tower and chiller mixed cooling mode and mechanical compression cooling mode. Through a simple and flexible natural cooling architecture, a variety of different natural cooling methods are provided that can be flexibly switched, making full use of the advantages of each cooling mode, reducing the annual operating energy consumption of the DC cabin air-conditioning system, and improving the utilization rate of the natural cold source of the DC cabin air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 The schematic diagram of the structure of a cooling control device for a DC compartment based on a water system provided in an embodiment of the present application is exemplarily shown;

[0020] Figure 2 A schematic diagram of an indirect cooling mode of a cooling tower provided in an embodiment of the present application is exemplarily shown;

[0021] Figure 3 A schematic diagram of a direct cooling mode of a cooling tower provided in an embodiment of the present application is exemplarily shown;

[0022] Figure 4 A schematic diagram of a mixed cooling mode of a cooling tower and a chiller provided in an embodiment of the present application is exemplarily shown;

[0023] Figure 5 A schematic diagram of a mechanical compression cooling mode provided by an embodiment of the present application is exemplarily shown;

[0024] Figure 6 A flow chart of a cooling control method for a DC compartment based on a water system provided in an embodiment of the present application is exemplarily shown;

[0025] Figure 7 A flow chart of a complete cooling control method for a DC compartment based on a water system provided by an embodiment of the present application is exemplarily shown;

[0026] Figure 8The schematic diagram of the structure of a controller provided by an embodiment of the present application is exemplarily shown;

[0027] Fig. 9 A structural diagram of a control device provided in an embodiment of the present application is exemplarily shown. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0029] For ease of understanding, the terms involved in the embodiments of the present application are explained below:

[0030] (1) A data center (DC) cabin is a system consisting of cabinets, air conditioners (which may be inter-row air conditioners), power distribution cabinets, structural frames, and enclosed components (including skylights, passage doors, wiring ducts, etc.), which provide a suitable temperature and humidity environment for the normal operation of electronic equipment. A DC cabin can also be called a micromodule, which has the advantages of high integration, prefabrication, rapid deployment, and phased investment and construction, and is widely used in data centers. In an embodiment of the present application, a DC cabin can be a flexible DC cabin, which means that the equipment therein is changeable.

[0031] (2) Power Usage Effectiveness (PUE): The ratio of the total power consumed by all electrical equipment in the communication room to the total power consumed by all communication equipment.

[0032] (3) Internet Data Center (IDC): refers to a service platform with complete equipment (including high-speed Internet access bandwidth, high-performance local area network, safe and reliable computer room environment, etc.), professional management, and complete applications.

[0033] (4) Computer Room Air Conditioner (CRAC): An air conditioning device that provides a stable temperature and humidity environment for electronic equipment in the computer room.

[0034] (5) Power Distribution Unit (PDU): Responsible for transmitting power to the numerous devices in the server rack. It is an important component of the data center and ensures that the servers and network equipment in the rack are continuously and reliably powered.

[0035] (6) RACK: A cabinet that houses servers and other IT equipment.

[0036] The air conditioning system of the traditional DC cabin is mainly based on mechanical compression refrigeration. The air conditioning system runs uninterruptedly for 8,760 hours a year, consuming huge amounts of electricity, and the PUE of the computer room remains high.

[0037] In addition, in the existing technology, chilled water inter-row air conditioning is one of the most mature and widely used refrigeration technologies in DC cabins. The chiller runs uninterruptedly throughout the year to provide low-temperature chilled water for the inter-row air conditioning. Even in low temperature conditions in winter, the chiller needs to run continuously, and it is impossible to directly use low-temperature natural cold sources for cooling, resulting in energy waste.

[0038] In addition, existing natural cooling technologies are generally divided into water-side natural cooling and wind-side natural cooling. Water-side natural cooling includes the use of natural low-temperature water sources, such as lake water, groundwater, etc. This natural cold source utilization method has high requirements for data center site selection and is suitable for data centers near lakes and seas, so its application scope is limited.

[0039] In addition, the widely used water-side natural cooling technology in the prior art is to produce low-temperature water through a cooling tower, and utilize the natural cold source by connecting a plate heat exchanger in series or in parallel with a chiller. This natural cold source utilization method has a complex piping system, high investment cost, and inconvenient control, which is limited in practical application.

[0040] Therefore, in order to solve the problems of the natural cooling system in the DC cabin in the prior art, such as complexity, high investment cost, inconvenient control, inability to fully utilize the natural cold source for cooling, huge energy consumption caused by the uninterrupted operation of the mechanical compression refrigeration system throughout the year, and excessively high PUE, a new natural cooling mode and operation control method for the DC cabin is proposed, which can fully utilize the natural cold source for cooling, shorten the operating time of the computer room air-conditioning compressor throughout the year, and reduce the annual operating energy consumption of the air-conditioning unit, but also reduce the complexity of the natural cooling system, improve the flexibility and practicality of the natural cooling system, and realize the green, energy-saving and sustainable development of the computer room.

[0041] To this end, the embodiment of the present application provides a cooling control device and control method for a DC cabin based on a water system. On the basis of the original air-conditioning chiller, by adding components such as pipelines, valves, and plate changes that utilize natural cold sources, compared with the traditional natural cooling series and parallel complex pipeline system, the DC cabin natural cooling system has a simple architecture, flexible switching, and greater practicality. It realizes flexible utilization of natural cold sources, has a simple overall architecture, is easy to transform, and solves the problems of complex pipelines, high investment costs, and inconvenient control in traditional natural cold source utilization systems.

[0042] Specifically, the device includes a cooling tower, a cooling water pump, a chiller, a refrigerated water pump, a plate heat exchanger and at least one electric valve. According to the current outdoor temperature, the opening and closing states of the cooling tower, the cooling water pump, the chiller, the refrigerated water pump, the plate heat exchanger and at least one electric valve are controlled so that the cooling control device operates in different cooling modes. The cooling modes here include the cooling tower indirect cooling mode, the cooling tower direct cooling mode, the cooling tower and the chiller mixed cooling mode and the mechanical compression cooling mode. According to different natural cold source conditions, different cooling operation modes can be flexibly selected and switched to maximize the use of natural cold sources, improve the utilization efficiency of natural cold sources by the air conditioning system, shorten the annual operation time of the refrigeration system compressor, and reduce the annual operating energy consumption of the DC cabin refrigeration system. While reducing the annual operating energy consumption of the computer room air conditioning system, the safety of the computer room air conditioning system is improved, which is green and energy-saving.

[0043] To further illustrate the technical solution provided by the embodiment of the present application, this is described in detail below in conjunction with the accompanying drawings and specific implementation methods. Although the embodiment of the present application provides the method operation steps shown in the following embodiments or drawings, more or fewer operation steps may be included in the method based on routine or no creative labor. In the steps where there is no necessary causal relationship logically, the execution order of these steps is not limited to the execution order provided in the embodiment of the present application.

[0044] refer to Figure 1 A schematic structural diagram of a cooling control device for a DC compartment based on a water system is shown, and the cooling control device is deployed in the DC compartment. Figure 1 The principle of natural cooling of DC cabin based on water system is shown in FIG. Figure 1 , the technical solution provided in the embodiments of the present application is described.

[0045] The cooling control device includes a cooling tower, a cooling water pump, a chiller, a refrigerated water pump, a plate heat exchanger and at least one electric valve. In the embodiment of the present application, 10 electric valves are used as an example for illustration. In actual application, the number of cooling towers, cooling water pumps, chillers, refrigerated water pumps, plate heat exchangers and electric valves is not specifically limited.

[0046] refer to Figure 1 , 1 represents the first electric valve, 2 represents the second electric valve, 3 represents the third electric valve, 4 represents the fourth electric valve, 5 represents the fifth electric valve, 6 represents the sixth electric valve, 7 represents the seventh electric valve, 8 represents the eighth electric valve, 9 represents the ninth electric valve, and 10 represents the tenth electric valve. A represents a cooling water pump, and B represents a freezing water pump.

[0047] Among them, the plate heat exchanger is connected to the first electric valve 1, the second electric valve 2, the fifth electric valve 5 and the sixth electric valve 6 respectively; the chiller is connected to the third electric valve 3, the fourth electric valve 4, the seventh electric valve 7 and the eighth electric valve 8 respectively; the ninth electric valve 9 is connected to the cooling water pump A and the chilled water pump B respectively; the tenth electric valve 10 is connected to the outlet pipes of the cooling tower and the air conditioner of the DC cabin respectively; the first electric valve 1 and the third electric valve 3 are also connected to the cooling water pump A respectively; the second electric valve 2 and the fourth electric valve 4 are also connected to the cooling tower respectively; the fifth electric valve 5, the seventh electric valve 7 and the ninth electric valve 9 are also connected to the chilled water pump B respectively; the sixth electric valve 6, the eighth electric valve 8 and the tenth electric valve 10 are also connected to the outlet pipes of the air conditioner of the DC cabin respectively; the cooling water pump A is also connected to the cooling tower; the chilled water pump B is also connected to the inlet pipe of the air conditioner of the DC cabin.

[0048] Figure 1 The water inlet and outlet pipes of four air conditioners are shown in FIG. Figure 1 The dotted line in the middle indicates the water inlet direction, and the solid line indicates the water outlet direction after the air conditioner.

[0049] Specifically, the opening and closing states of the cooling tower, cooling water pump A, chiller, refrigeration water pump B, plate heat exchanger and at least one electric valve can be controlled according to the current outdoor temperature, so that the cooling control device operates in different cooling modes. The cooling modes here include cooling tower indirect cooling mode, cooling tower direct cooling mode, cooling tower and chiller mixed cooling mode and mechanical compression cooling mode.

[0050] Next, these four cooling modes are explained respectively.

[0051] The first mode is the indirect cooling mode of cooling tower.

[0052] like Figure 2 As shown, Figure 2 A schematic diagram of an indirect cooling mode of a cooling tower provided in an embodiment of the present application. In this mode, the cooling tower indirectly provides a cold circulation loop, and the cooling tower indirectly provides cooling capacity for the column air conditioner through a plate heat exchanger.

[0053] If the current outdoor temperature meets the natural cooling condition and the cooling tower is an open cooling tower, the cooling control device is in the cooling tower indirect cooling mode. The natural cooling condition means that the current outdoor temperature is less than the first set temperature threshold (the set natural cooling temperature), and the first set temperature threshold can be 10°C. In a specific example, the current outdoor temperature refers to the natural cold source environment temperature, which can be obtained by real-time monitoring of the temperature and humidity of the outdoor environment through a temperature and humidity sensor.

[0054] Among them, the cooling tower, cooling water pump A, plate heat exchanger, the first electric valve, the second electric valve, the fifth electric valve, the sixth electric valve and the chilled water pump B are all in the open state, and the chiller, the third electric valve, the fourth electric valve, the seventh electric valve, the eighth electric valve, the ninth electric valve and the tenth electric valve are all in the closed state, then it is determined that the cooling control device is in the cooling tower indirect cooling mode.

[0055] Optionally, when natural cooling conditions are met (i.e., low temperature conditions, such as winter), the cooling tower bears all the heat load requirements of the DC cabin to achieve completely natural cooling. After absorbing the heat from the electronic equipment, the temperature of the low-temperature chilled water inside the coil of the inter-row air conditioner in the DC cabin increases. Under the driving force of the chilled water pump B, it enters the return water coil and re-enters the plate heat exchanger to exchange heat with the low-temperature chilled water from the cooling tower, thereby dissipating the heat dissipation of the electronic equipment in the DC cabin into the atmosphere through the cooling tower, and the cycle continues. The plate heat exchanger plays the role of isolating heat exchange here, avoiding cross-contamination between the circulating water of the cooling tower and the circulating water of the inter-row air conditioner in the DC cabin, and ensuring the purity of the low-temperature chilled water of the inter-row air conditioner.

[0056] It should be noted that the first mode requires a plate heat exchanger, so it can be determined that the plate heat exchanger is in a non-dirty and blocked state. The specific method can be to monitor the pressure difference on both sides of the plate heat exchanger through a pressure difference sensor to determine whether the pressure difference on both sides of the plate heat exchanger is less than the set pressure difference threshold. If so, it is determined that the plate heat exchanger is in a non-dirty and blocked state.

[0057] The second mode: cooling tower direct cooling mode

[0058] like Figure 3 As shown, Figure 3 A schematic diagram of a cooling tower direct cooling mode provided in an embodiment of the present application. In this mode, the cooling tower directly supplies cooling to the row air conditioner in a circulation loop.

[0059] If the current outdoor temperature meets the natural cooling conditions and the cooling tower is a closed cooling tower, the cooling control device is in the cooling tower direct cooling mode.

[0060] Figure 3 In the embodiment, the cooling tower is a closed cooling tower, and the cooling tower, cooling water pump A, the ninth electric valve, the tenth electric valve, and the chilled water pump B are all in the open state; the chiller, the plate heat exchanger, the first electric valve, the second electric valve, the third electric valve, the fourth electric valve, the fifth electric valve, the sixth electric valve, the seventh electric valve, and the eighth electric valve are all in the closed state, then it is determined that the cooling control device is in the cooling tower direct cooling mode.

[0061] In this mode, due to the presence of the plate heat exchanger, an additional heat exchange process is added, which will shorten the utilization time of the natural cold source. For special cooling towers, such as closed cooling towers, the cooling water circulates in a closed manner in the tower and does not come into direct contact with the atmospheric environment. The water quality is good and does not need to pass through the plate heat exchanger. The low-temperature chilled water at the outlet of the cooling tower directly enters the chilled water coil of the inter-row air conditioner in the DC cabin under the action of the cooling water pump A. After taking away the heat dissipation of the electronic equipment, it returns to the cooling tower and exchanges heat with the atmospheric environment. This natural cooling method reduces the heat loss in the intermediate heat exchange link and prolongs the utilization time of the natural cold source. It is a direct and efficient natural cooling method.

[0062] Therefore, in the first and second modes, in low temperature seasons (such as winter), the DC cabin is cooled directly or indirectly (plate heat exchanger) through the cooling tower, the chiller stops working, and the natural cold source is fully utilized to dissipate heat for the DC cabin to achieve energy saving.

[0063] The third mode: cooling tower and chiller mixed cooling mode

[0064] Figure 4 A schematic diagram of a mixed cooling mode of a cooling tower and a chiller provided in an embodiment of the present application. In this mode, a mixed refrigeration cycle loop is provided, and the cooling tower and the chiller provide cooling capacity for the inter-row air conditioner at the same time.

[0065] If the current outdoor temperature does not meet the natural cooling conditions, for example, the current outdoor temperature is greater than 10°C, then continue to determine whether the current outdoor temperature meets the set transition season conditions (for example, the current outdoor temperature belongs to a temperature range, which can be 15°C-25°C, such as spring and autumn). If the set transition season conditions are met, it can be determined that the cooling control device is operating in the third mode.

[0066] Figure 4 Among them, if the cooling tower, cooling water pump A, plate heat exchanger, the first electric valve, the second electric valve, the third electric valve, the fourth electric valve, the fifth electric valve, the sixth electric valve, the seventh electric valve, and the eighth electric valve are all in the open state, and the ninth electric valve and the tenth electric valve are all in the closed state, it is determined that the cooling control device is in the mixed cooling mode of the cooling tower and the chiller.

[0067] refer to Figure 4In the transitional seasons of spring and autumn, the natural cold source cannot fully meet the cooling demand of the DC cabin and can only provide partial cooling capacity. At this time, the chiller must be turned on to supplement the cooling capacity of the DC cabin. After absorbing the heat from the electronic equipment, the temperature of the low-temperature chilled water inside the coil of the inter-row air conditioner in the DC cabin rises. Under the driving force of the chilled water pump B, it enters the return water coil. Part of it enters the plate heat exchanger to exchange heat with the low-temperature chilled water from the cooling tower, and the other part enters the chiller. Finally, the heat dissipated by the electronic equipment in the DC cabin is dissipated into the atmosphere through the cooling tower, and the cycle continues. Since the cooling tower is used to provide part of the natural cold source, the chiller only bears part of the load demand instead of running at full load, thus saving the operating energy consumption of the air conditioning host.

[0068] Therefore, in the third mode, in the transition seasons (such as spring and autumn), the cooling tower is used to provide part of the cooling capacity for the DC cabin, and at the same time, the chiller is turned on to supplement part of the cooling capacity for the DC cabin, thereby maximizing the utilization of the natural cooling source in the transition season.

[0069] It should be noted that in the third mode, the plate heat exchanger is also in a non-dirty and non-blocked state. The specific method for determining the dirty and non-blocked state can be referred to the above embodiment, which will not be described in detail here.

[0070] In the first three modes, full use is made of the natural cold sources in winter and transitional seasons to provide cooling for the DC cabin, maximizing the use of natural cold sources and solving the problem of waste of natural cold sources and excessive PUE energy consumption of air-conditioning units caused by the use of mechanical compression refrigeration in DC cabins throughout the year.

[0071] The fourth mode: mechanical compression cooling mode

[0072] Figure 5 A schematic diagram of a mechanical compression cooling mode provided in an embodiment of the present application. In this mode, the chiller provides cooling capacity for the row-to-row air conditioners.

[0073] If the current outdoor temperature does not meet the natural cooling conditions, for example, the current outdoor temperature is greater than 10°C, then continue to determine whether the current outdoor temperature meets the set transition season conditions (for example, the current outdoor temperature belongs to a temperature range, which can be 15°C-25°C). If it does not meet the set transition season conditions, it is greater than 25°C, such as in summer, and it can be determined that the cooling control device is operating in the fourth mode.

[0074] Figure 5In the embodiment, if the cooling tower, cooling water pump A, the third electric valve, the fourth electric valve, the chiller, the seventh electric valve, the eighth electric valve, and the chilled water pump B are all in the open state, and the plate heat exchanger, the first electric valve, the second electric valve, the fifth electric valve, the sixth electric valve, the ninth electric valve, and the tenth electric valve are all in the closed state, it is determined that the cooling control device is in the mechanical compression cooling mode.

[0075] refer to Figure 5 , conventional mechanical compression cooling. Under hot temperature conditions (such as summer), the outlet water temperature of the cooling tower cannot meet the demand of the inter-row air conditioner for low-temperature chilled water. At this time, the chiller is started to take chilled water, and the low-temperature chilled water enters the chilled water coil inside the inter-row air conditioner to directly provide cooling for the DC cabin. This mode is the traditional compression refrigeration mode. Under the action of the chilled water pump B, the low-temperature chilled water at the outlet of the chiller is distributed to the chilled water coils of each inter-row air conditioner inside the DC cabin through the chilled water supply ring pipe. After absorbing the heat of the electronic equipment, it returns to the chiller. The chiller transfers this part of the heat to the atmosphere through the cooling tower, and the cycle continues.

[0076] Therefore, in the fourth mode, in hot seasons (such as summer), chilled water is used to provide cooling for the DC cabin through conventional mechanical compression refrigeration. By controlling the closing and opening of the electric valve, different cooling circulation loops can be flexibly switched to maximize the use of natural cooling sources.

[0077] In addition, if it is detected that the plate heat exchanger is in a dirty and blocked state, the cooling control device can be controlled to operate in a mechanical compression cooling mode or a cooling tower direct cooling mode according to the actual outdoor temperature.

[0078] Combining the above four cooling modes, it can be seen that the cooling mode to be applied is determined according to the current outdoor temperature. At the same time, two cold source systems, cooling tower and chiller, are used to provide cooling for the DC cabin, which can fully utilize the outdoor natural cold source in the low temperature season and transition season, and improve the year-round operating energy efficiency of the air-conditioning unit.

[0079] In the embodiment of the present application, the inter-row air conditioner in the DC cabin is used to cool down the electronic equipment. The inter-row air conditioner can be cooled by a chiller or a cooling tower, or by both the chiller and the cooling tower. In this design, the inter-row air conditioner can switch different operation modes according to the actual outdoor natural cold source conditions, that is, the chiller cooling mode, the cooling tower cooling mode, or the chiller and the cooling tower cooling mode. This improves the utilization rate of the natural cold source, reduces the annual operating energy consumption of the air conditioning unit, and improves the overall energy saving efficiency of the DC cabin.

[0080] Figure 6 A flow chart of a cooling control method for a DC compartment based on a water system provided in an embodiment of the present application. Figure 6 At least the following situations are included:

[0081] Case a: When the current outdoor temperature meets the natural cooling conditions, if the cooling tower is a closed cooling tower, the cooling control device is controlled to operate in the cooling tower direct cooling mode.

[0082] Case b: When the current outdoor temperature meets the natural cooling conditions, if the cooling tower is an open cooling tower, the cooling control device is controlled to operate in the cooling tower indirect cooling mode;

[0083] Case c: When the current outdoor temperature does not meet the natural cooling conditions, if the current outdoor temperature meets the set transitional season conditions, the cooling control device is controlled to operate in a mixed cooling mode of the cooling tower and the chiller.

[0084] Case d: When the current outdoor temperature does not meet the natural cooling condition, if the current outdoor temperature does not meet the set transition season condition, the cooling control device is controlled to operate in the mechanical compression cooling mode.

[0085] in, Figure 6 The implementation method of each step can be found in the above embodiment and will not be repeated here.

[0086] The embodiment of the present application solves the control logic and mode switching problems of the air conditioning system under different natural cold source conditions. According to the outdoor natural cold source conditions, different operation modes can be flexibly selected and switched to ensure that the air conditioning system maximizes the use of natural cold sources.

[0087] Figure 7 A flow chart of a complete cooling control method for a DC compartment based on a water system provided in an embodiment of the present application, which method can be executed by a controller of a cooling control device. Figure 7 At least the following steps are included

[0088] S701: Obtain the current outdoor temperature.

[0089] S702: Compare the current outdoor temperature with the first set temperature to determine whether the current outdoor temperature meets the natural cooling temperature condition. If so, execute S703; otherwise, execute S708.

[0090] S703: Determine whether the type of the cooling tower is a closed cooling tower, then execute S710, otherwise execute S704.

[0091] S704: Open the first electric valve 1, the second electric valve 2, the fifth electric valve 5, the sixth electric valve 6, the cooling tower, the cooling water pump A, and the freezing water pump B; and close the third electric valve 3, the fourth electric valve 4, the seventh electric valve 7, the eighth electric valve 8, the ninth electric valve 9, the tenth electric valve 10 and the chiller.

[0092] S705: Determine whether the pressure difference on both sides of the plate heat exchanger exceeds the set pressure difference threshold. If so, it means that the plate heat exchanger is dirty and blocked, and then execute S706. Otherwise, it means that the plate heat exchanger is in good working condition, and then execute S707.

[0093] S706: Open the third electric valve 3, the fourth electric valve 4, the seventh electric valve 7, the eighth electric valve 8, the chiller, the refrigeration water pump B, the cooling tower, and the cooling water pump A; and close the first electric valve 1, the second electric valve 2, the fifth electric valve 5, the sixth electric valve 6, the ninth electric valve 9, and the tenth electric valve 10.

[0094] S707: Maintain natural cooling state and continue to operate.

[0095] S708: Determine whether the current outdoor temperature meets the set transitional season temperature condition. If so, execute S709; otherwise, execute S706.

[0096] S709: Open the chiller, chilled water pump B, cooling tower, cooling water pump A, the first electric valve 1, the second electric valve 2, the third electric valve 3, the fourth electric valve 4, the fifth electric valve 5, the sixth electric valve 6, the seventh electric valve 7, the eighth electric valve 8, and close the ninth electric valve 9 and the tenth electric valve 10.

[0097] Among them, the mixed cooling mode of cooling tower cooling and chiller cooling is started at the same time to jointly bear the heat dissipation load of the DC cabin.

[0098] S710: Open the cooling tower, cooling water pump A, the ninth electric valve 9, the tenth electric valve 10, and the chilled water pump B, and close the chiller, the first electric valve 1, the second electric valve 2, the third electric valve 3, the fourth electric valve 4, the fifth electric valve 5, the sixth electric valve 6, the seventh electric valve 7, and the eighth electric valve 8.

[0099] S711: The system continues to run stably.

[0100] Figure 7 The implementation method of each step can be found in the above embodiment and will not be repeated here.

[0101] like Figure 8 As shown, based on the same inventive concept, an embodiment of the present application provides a controller, which is integrated in a cooling control device, and includes:

[0102] The acquisition unit 81 is used to: acquire the current outdoor temperature;

[0103] The processing unit 82 is used to: when the current outdoor temperature meets the natural cooling condition, if the cooling tower is a closed cooling tower, control the cooling control device to operate in the cooling tower direct cooling mode; if the cooling tower is an open cooling tower, control the cooling control device to operate in the cooling tower indirect cooling mode;

[0104] The processing unit 82 is also used for: when the current outdoor temperature does not meet the natural cooling conditions, if the current outdoor temperature meets the set transition season conditions, then the cooling control device is controlled to operate in a mixed cooling mode of the cooling tower and the chiller; otherwise, the cooling control device is controlled to operate in a mechanical compression cooling mode.

[0105] In an optional implementation, the processing unit 82 is further configured to:

[0106] Before controlling the cooling control device to operate in the indirect cooling mode of the cooling tower, and before controlling the cooling control device to operate in the mixed cooling mode of the cooling tower and the chiller, it is determined that the plate heat exchanger is in a non-dirty and blocked state.

[0107] In an optional implementation, the processing unit 82 is further configured to:

[0108] If it is detected that the plate heat exchanger is in a dirty and blocked state, the cooling control device is controlled to operate in a mechanical compression cooling mode or a cooling tower direct cooling mode.

[0109] In an optional embodiment, the processing unit 82 is further used to: if it is detected that the pressure difference on both sides of the plate heat exchanger is less than a set pressure difference threshold, determine that the plate heat exchanger is in a non-dirty and blocked state; otherwise, determine that the plate heat exchanger is in a dirty and blocked state.

[0110] In an optional implementation, the processing unit 82 is further configured to: if the current outdoor temperature is less than a first set temperature threshold, determine that the current outdoor temperature satisfies a natural cooling condition.

[0111] Based on the same inventive concept as the above-mentioned DC cabin cooling control method based on the water system, the embodiment of the present application also provides a control device, which can be a control device or control system inside a smart device, or an external device that communicates with the smart device, such as a desktop computer, a portable computer, a smart phone, a tablet computer, a personal digital assistant (PDA), a server, etc. For example, if the control device is a desktop computer, the client can be deployed on the desktop computer. Fig. 9 As shown, the control device may include a processor 901 and a memory 902 .

[0112] Processor 901 can be a general-purpose processor, such as a central processing unit (CPU), a digital signal processor (DigitalSignal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor can be a microprocessor or any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as a hardware processor to be executed, or can be executed by a combination of hardware and software modules in the processor.

[0113] Memory 902, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer executable programs and modules. Memory can include at least one type of storage medium, for example, can include flash memory, hard disk, multimedia card, card-type memory, random access memory (Random Access Memory, RAM), static random access memory (Static Random Access Memory, SRAM), programmable read-only memory (Programmable Read Only Memory, PROM), read-only memory (Read Only Memory, ROM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), magnetic memory, disk, optical disk, etc. Memory is any other medium that can be used to carry or store a desired program code in the form of an instruction or data structure and can be accessed by a computer, but is not limited thereto. The memory 902 in the embodiment of the present application can also be a circuit or any other device that can realize a storage function, for storing program instructions and / or data.

[0114] A person of ordinary skill in the art can understand that: all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above method embodiments; the above computer storage medium can be any available medium or data storage device that can be accessed by a computer, including but not limited to: mobile storage devices, random access memory (RAM, Random Access Memory), magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO)), optical storage (such as CD, DVD, BD, HVD, etc.), and semiconductor storage (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)) and other media that can store program codes.

[0115] Alternatively, if the above-mentioned integrated unit of the present application is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods of each embodiment of the present application. The aforementioned storage medium includes: a mobile storage device, a random access memory (RAM, Random Access Memory), a magnetic storage device (such as a floppy disk, a hard disk, a magnetic tape, a magneto-optical disk (MO), etc.), an optical storage device (such as CD, DVD, BD, HVD, etc.), and a semiconductor memory (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), a solid-state drive (SSD)) and other various media that can store program codes.

[0116] Based on the same inventive concept, the embodiment of the present application also provides a computer program product, which includes: computer program code, when the computer program code is run on a computer, the computer executes any of the page switching methods discussed above. Since the principle of solving the problem by the above computer program product is similar to that of the page switching method, the implementation of the above computer program product can refer to the implementation of the method, and the repeated parts will not be repeated.

[0117] The above embodiments are only used to introduce the technical solutions of the present application in detail, but the description of the above embodiments is only used to help understand the methods of the embodiments of the present application and should not be understood as limiting the embodiments of the present application. Any changes or substitutions that can be easily thought of by technicians in this technical field should be included in the protection scope of the embodiments of the present application.

Claims

1. A cooling control device for a DC compartment based on a water system, characterized in that: include: Cooling tower, cooling water pump, chiller, chilled water pump, plate heat exchanger and at least one electric valve; The plate heat exchanger is connected to the first electric valve, the second electric valve, the fifth electric valve and the sixth electric valve respectively; the chiller is connected to the third electric valve, the fourth electric valve, the seventh electric valve and the eighth electric valve respectively; the ninth electric valve is connected to the cooling water pump and the freezing water pump respectively; the tenth electric valve is connected to the outlet pipe of the cooling tower and the air conditioner of the DC cabin respectively; the first electric valve and the third electric valve are also connected to the cooling water pump respectively; the second electric valve and the fourth electric valve are also connected to the cooling tower respectively; the fifth electric valve, the seventh electric valve and the ninth electric valve are also connected to the freezing water pump respectively; the sixth electric valve, the eighth electric valve and the tenth electric valve are also connected to the outlet pipe of the air conditioner of the DC cabin respectively; the cooling water pump is also connected to the cooling tower; the freezing water pump is also connected to the water inlet pipe of the air conditioner of the DC cabin; According to the current outdoor temperature, the opening and closing states of the cooling tower, the cooling water pump, the chiller, the refrigerated water pump, the plate heat exchanger and the at least one electric valve are controlled to enable the cooling control device to operate in different cooling modes; wherein the cooling modes include cooling tower indirect cooling mode, cooling tower direct cooling mode, cooling tower and chiller mixed cooling mode and mechanical compression cooling mode.

2. The device according to claim 1, characterized in that If the cooling tower, the cooling water pump, the plate heat exchanger, the first electric valve, the second electric valve, the fifth electric valve, the sixth electric valve and the chilled water pump are all in the open state, and the chilled water main unit, the third electric valve, the fourth electric valve, the seventh electric valve, the eighth electric valve, the ninth electric valve and the tenth electric valve are all in the closed state, it is determined that the cooling control device is in the cooling tower indirect cooling mode.

3. The device according to claim 1, characterized in that If the cooling tower is a closed cooling tower, and the cooling tower, the cooling water pump, the ninth electric valve, the tenth electric valve, and the chilled water pump are all in the open state; the chiller, the plate heat exchanger, the first electric valve, the second electric valve, the third electric valve, the fourth electric valve, the fifth electric valve, the sixth electric valve, the seventh electric valve, and the eighth electric valve are all in the closed state, then it is determined that the cooling control device is in the cooling tower direct cooling mode.

4. The device according to claim 1, characterized in that If the cooling tower, the cooling water pump, the plate heat exchanger, the first electric valve, the second electric valve, the third electric valve, the fourth electric valve, the fifth electric valve, the sixth electric valve, the seventh electric valve, and the eighth electric valve are all in the open state, and the ninth electric valve and the tenth electric valve are both in the closed state, it is determined that the cooling control device is in a mixed cooling mode of the cooling tower and the chiller.

5. The device according to claim 1, characterized in that If the cooling tower, the cooling water pump, the third electric valve, the fourth electric valve, the chiller, the seventh electric valve, the eighth electric valve, and the chilled water pump are all in the open state, and the plate heat exchanger, the first electric valve, the second electric valve, the fifth electric valve, the sixth electric valve, the ninth electric valve, and the tenth electric valve are all in the closed state, it is determined that the cooling control device is in the mechanical compression cooling mode.

6. A cooling control method for a DC compartment based on a water system, characterized in that: Applied to the cooling control device according to any one of claims 1 to 5, the method comprises: When the current outdoor temperature meets the natural cooling conditions, if the cooling tower is a closed cooling tower, the cooling control device is controlled to operate in the direct cooling mode of the cooling tower; if the cooling tower is an open cooling tower, the cooling control device is controlled to operate in the indirect cooling mode of the cooling tower; When the current outdoor temperature does not meet the natural cooling condition, if the current outdoor temperature meets the set transitional season condition, the cooling control device is controlled to operate in a mixed cooling mode of a cooling tower and a chiller; otherwise, the cooling control device is controlled to operate in the mechanical compression cooling mode.

7. The method according to claim 6, characterized in that The method further comprises: The controlling of the cooling control device to operate in the indirect cooling mode of the cooling tower, and before the controlling of the cooling control device to operate in the mixed cooling mode of the cooling tower and the chiller, determines that the plate heat exchanger is in a non-dirty and blocked state.

8. The method according to claim 6, characterized in that The method further comprises: If it is detected that the plate heat exchanger is in a dirty and blocked state, the cooling control device is controlled to operate in the mechanical compression cooling mode or the cooling tower direct cooling mode.

9. The method according to claim 7 or 8, characterized in that: If it is detected that the pressure difference between the two sides of the plate heat exchanger is less than the set pressure difference threshold, it is determined that the plate heat exchanger is in a non-dirty and blocked state; otherwise, it is determined that the plate heat exchanger is in a dirty and blocked state.

10. The method according to any one of claims 6 to 8, characterized in that: If the current outdoor temperature is less than the first set temperature threshold, it is determined that the current outdoor temperature meets the natural cooling condition.

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