CN113175714A - Evaporative cooling unit, control method and related device - Google Patents

Evaporative cooling unit, control method and related device Download PDF

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Publication number
CN113175714A
CN113175714A CN202110481451.1A CN202110481451A CN113175714A CN 113175714 A CN113175714 A CN 113175714A CN 202110481451 A CN202110481451 A CN 202110481451A CN 113175714 A CN113175714 A CN 113175714A
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CN
China
Prior art keywords
air
humidity
temperature
cooling unit
machine room
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Granted
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CN202110481451.1A
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Chinese (zh)
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CN113175714B (en
Inventor
蒋宁
陶昌军
齐宇
雷海涛
陈伟
苏林
颜利波
卫鹏云
袁伟杰
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Tibet Ningsuan Technology Group Co ltd
GD Midea Heating and Ventilating Equipment Co Ltd
Hefei Midea Heating and Ventilating Equipment Co Ltd
Original Assignee
Tibet Ningsuan Technology Group Co ltd
GD Midea Heating and Ventilating Equipment Co Ltd
Hefei Midea Heating and Ventilating Equipment Co Ltd
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Application filed by Tibet Ningsuan Technology Group Co ltd, GD Midea Heating and Ventilating Equipment Co Ltd, Hefei Midea Heating and Ventilating Equipment Co Ltd filed Critical Tibet Ningsuan Technology Group Co ltd
Priority to CN202110481451.1A priority Critical patent/CN113175714B/en
Publication of CN113175714A publication Critical patent/CN113175714A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/0035—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using evaporation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
    • H05K7/208—Liquid cooling with phase change
    • H05K7/20827—Liquid cooling with phase change within rooms for removing heat from cabinets, e.g. air conditioning devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/20—Humidity
    • F24F2110/22—Humidity of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/50—Load

Abstract

The invention provides an evaporative cooling unit, a control method and a related device, belonging to the technical field of air conditioners, wherein the evaporative cooling unit comprises an air inlet channel and an air outlet channel which are communicated with a machine room, an air inlet of the air inlet channel is provided with a fresh air valve, the air inlet channel is internally provided with a cooling device, an air mixing valve is arranged between the air inlet channel and the air outlet channel, and the control method of the evaporative cooling unit comprises the following steps: acquiring the load rate of equipment in a machine room; acquiring a temperature value and a humidity value of an outdoor environment; controlling the air mixing valve and the exhaust valve to work according to the load rate, the temperature value and the humidity value; when the load rate is less than or equal to a first load threshold, the temperature value is less than a first temperature threshold, and the humidity value is less than a first humidity threshold, the humidity in the machine room is preferentially adjusted; and when the load rate is greater than or equal to the second load threshold, the temperature value is less than the second temperature threshold, and the humidity value is less than the first humidity threshold, preferentially adjusting the temperature in the machine room. The invention can stably control the humidity of the machine room.

Description

Evaporative cooling unit, control method and related device
Technical Field
The invention relates to the technical field of air conditioners, in particular to an evaporative cooling unit, a control method and a related device.
Background
In order to save energy, the data center is increasingly built in regions with lower environmental temperature and humidity such as northwest, northeast, cloud and the like, and a natural cold source is fully utilized to refrigerate the data center. When the dry bulb temperature of the outdoor environment is higher, the lower wet bulb temperature is utilized, and low-temperature air is obtained through water spraying evaporation cooling, so that the data center is cooled.
Particularly, a cooling unit of the data center is an open type refrigeration system, fresh air directly enters a machine room, and control of the humidity and cleanliness of the machine room is difficult. Particularly, when the load rate of the machine room is low (when the rack-loading rate of the server is not high) and the ambient temperature and humidity are low, the absolute moisture content of the fresh air is very small, the temperature is also low, and the humidity is difficult to be improved and the target humidity is difficult to be reached by spraying.
Disclosure of Invention
The invention aims to at least solve the problem of controlling the humidity and cleanliness of a machine room in the prior art.
To this end, the invention provides, in a first aspect, a method of controlling an evaporative cooling unit.
The invention provides a control device of an evaporative cooling unit in a second aspect.
A third aspect of the invention provides an evaporative cooling unit.
A fourth aspect of the invention provides a readable storage medium.
The invention provides a control method of an evaporative cooling unit, the evaporative cooling unit comprises an air inlet channel and an air outlet channel which are communicated with a machine room, an air inlet of the air inlet channel is provided with a fresh air valve, the air inlet channel is internally provided with a cooling device, an air mixing valve is arranged between the air inlet channel and the air outlet channel, and the control method of the evaporative cooling unit comprises the following steps: acquiring the load rate of equipment in a machine room; acquiring a temperature value and a humidity value of an outdoor environment; controlling the air mixing valve and the exhaust valve to work according to the load rate, the temperature value and the humidity value; when the load rate is less than or equal to a first load threshold, the temperature value is less than a first temperature threshold, and the humidity value is less than a first humidity threshold, the humidity in the machine room is preferentially adjusted; and when the load rate is greater than or equal to the second load threshold, the temperature value is less than the second temperature threshold, and the humidity value is less than the first humidity threshold, preferentially adjusting the temperature in the machine room.
The control method of the evaporative cooling unit provided by the invention can be applied to the evaporative cooling unit in a remote severe environment. Specifically, the evaporative cooling unit comprises an air inlet channel and an air exhaust channel which are communicated with the machine room; the air inlet of the air inlet channel is provided with a fresh air valve, the cooling device is arranged in the air inlet channel, fresh air in a natural environment can enter the air inlet channel from the air inlet and enters the machine room after passing through the cooling device, and the storage environment arranged in the machine room is guaranteed by adjusting the temperature and humidity in the machine room. An air mixing valve is arranged between the air inlet channel and the air exhaust channel, and air after heat exchange with the machine room can enter the air inlet channel again through the air mixing valve or be directly exhausted through the air exhaust channel.
Particularly, in the process of controlling the operation of the evaporative cooling unit, the load rate of equipment in a machine room (namely the racking rate of a server) is firstly obtained, the temperature value and the humidity value of the outdoor environment are obtained, and the humidity and the temperature of fresh air entering an air inlet channel from a fresh air valve are judged; then, the load factor of equipment in the computer lab, the temperature value of outdoor environment and the humidity value of outdoor environment are taken into comprehensive consideration, air valve and the work of exhaust valve are mixed in the control, the aperture of air valve and exhaust valve is mixed in the regulation to the proportion of new trend and return air in the air of assurance entering into the computer lab, and then the temperature and the humidity of the air of assurance entering into the computer lab are suitable, and the air of assurance entering into the computer lab can not receive external adverse circumstances influence, and then guarantees the life of equipment in the computer lab.
Specifically, if the load rate of the equipment in the machine room is less than or equal to the first load threshold, it indicates that the load rate of the equipment in the machine room is low at this time, that is, it indicates that the heat generated by the equipment in the machine room during operation is less, that is, it indicates that the requirement of the machine room for cooling is not high. At this moment, if the temperature value is smaller than the first temperature threshold value, the outdoor fresh air has certain cooling capacity, and the cooling requirement of the machine room can be basically met. Therefore, in this case, the humidity in the machine room is preferentially adjusted, and when the temperature in the machine room meets the requirement, the humidity in the machine room is adjusted.
Specifically, if the load rate of the equipment in the machine room is greater than or equal to the second load threshold, it indicates that the load rate of the equipment in the machine room is higher at this time, that is, it indicates that more heat is generated in the machine room due to the operation of the equipment, and that is, it indicates that the requirement of the machine room for cooling is higher. At this time, if the temperature value is greater than or equal to the second temperature threshold value, it indicates that the temperature of the outdoor fresh air is also high, and the cooling requirement of the machine room cannot be met. Therefore, in this case, if the humidity value of the outdoor environment is smaller than the first humidity threshold, it indicates that the machine room needs to be further humidity-adjusted. Therefore, in this case, the temperature in the machine room is preferentially adjusted, and when the humidity in the machine room satisfies the requirement, the temperature in the machine room is adjusted.
It is worth noting that the evaporative cooling unit is an open type refrigeration system, fresh air directly enters a machine room, and control of humidity and cleanliness of the machine room is a difficult point. When the load of a machine room is low (the rack-loading rate of a server is not high) and the ambient temperature and humidity are low, the absolute moisture content of fresh air is very small, the temperature is low, and the humidity is difficult to improve and the target humidity is achieved by spraying.
Therefore, the load rate of the equipment in the machine room is judged firstly, then the load rate of the equipment in the machine room, the temperature value of the outdoor environment and the humidity value of the outdoor environment are comprehensively considered, the opening degrees of the air mixing valve and the air exhaust valve are adjusted to ensure the mixing proportion of fresh air and return air, the self-adaption of the evaporative cooling unit is realized, the control unit can self-adjust based on the actual environment, particularly under the conditions of low load, low temperature and low humidity, the humidity of the machine room can be stably controlled without increasing the thermal compensation power consumption, the humidity and the temperature in the machine room are ensured, and meanwhile, the integral structure simplification of the evaporative cooling unit is ensured. In addition, the control method of the evaporative cooling unit provided by the invention can be used for preferentially adjusting the humidity or the temperature in the machine room under different conditions so as to ensure the comprehensive effect of the temperature and the humidity in the machine room.
The control method of the evaporative cooling unit according to the above technical solution of the present invention may further have the following additional technical features:
in the technical scheme, when the load rate is smaller than or equal to the first load threshold, the temperature value is smaller than the first temperature threshold, and the humidity value is smaller than the first humidity threshold, the air mixing valve is controlled to be in the maximum opening degree, and the fresh air valve is controlled to be in the minimum opening degree or closed.
In this technical scheme, if the load factor of the equipment in the equipment room is less than or equal to the first load threshold, it indicates that the load factor of the equipment in the equipment room is low at this time, that is, it indicates that the heat generated by the equipment in the equipment room during operation is less, and that is, it indicates that the equipment room does not have a high cooling demand. At this moment, if the temperature value is smaller than the first temperature threshold value, the outdoor fresh air has certain cooling capacity, and the cooling requirement of the machine room can be basically met. Therefore, the outdoor fresh air is judged to basically meet the cooling requirement of the machine room, and when the machine room needs to adjust the humidity, the opening degree of the air mixing valve is adjusted to be the maximum, and meanwhile, the opening degree of the fresh air valve is adjusted to be the minimum, or the fresh air valve is directly controlled to be closed. At the moment, in the air entering the machine room, the return air occupies a higher proportion, and the humidity of the fresh air can be adjusted through the return air so as to ensure that the humidity of the air entering the machine room meets the requirement.
In any of the above technical solutions, when the load factor is less than or equal to the first load threshold, the temperature value is greater than or equal to the first temperature threshold, and the humidity value is greater than or equal to the first humidity threshold, the air mixing valve and the exhaust valve are controlled to operate according to the temperature value and the humidity value.
In this technical scheme, if the load factor of the equipment in the equipment room is less than or equal to the first load threshold, it indicates that the load factor of the equipment in the equipment room is low at this time, that is, it indicates that the heat generated by the equipment in the equipment room during operation is less, and that is, it indicates that the equipment room does not have a high cooling demand. If the humidity value of the outdoor environment is larger than or equal to the first humidity threshold value, the humidity value of the outdoor fresh air basically meets the requirement of the machine room on the humidity. If the temperature value is greater than or equal to the first temperature threshold value, the fresh air needs to be cooled to a certain degree.
Therefore, at this time, the machine room has regulation needs for both humidity and temperature, but the two do not have priority. Therefore, the humidity value and the temperature value of the outdoor environment can be comprehensively considered, and the opening degree of the fresh air valve and the opening degree of the air mixing valve can be adjusted simultaneously.
In any of the above technical solutions, when the load factor is greater than or equal to the second load threshold and the temperature value is greater than or equal to the second temperature threshold, the air mixing valve is controlled to be at the minimum opening degree or closed, and the fresh air valve is controlled to be at the maximum opening degree.
In this technical scheme, if the load factor of the equipment in the machine room is greater than or equal to the second load threshold, it indicates that the load factor of the equipment in the machine room is higher at this time, that is, it indicates that the heat generated by the equipment in the machine room is more, that is, it indicates that the machine room has a higher cooling demand. At this time, if the temperature value is greater than or equal to the second temperature threshold value, it indicates that the temperature of the outdoor fresh air is also high, and the cooling requirement of the machine room cannot be met. Therefore, when the operation of the air mixing valve and the exhaust valve is judged to be controlled according to the temperature value of the outdoor environment and the temperature in the machine room is preferentially ensured to meet the requirement, the opening degree of the air mixing valve is adjusted to be minimum or the air mixing valve is directly closed, and meanwhile, the opening degree of the fresh air valve is adjusted to be maximum. At the moment, the fresh air occupies a higher proportion in the air entering the machine room, and the temperature of the return air can be reduced through the fresh air so as to ensure that the temperature of the air entering the machine room meets the requirement.
In particular, the second load threshold is greater than the first load threshold.
Specifically, the second temperature threshold is greater than the first temperature threshold.
In any of the above technical solutions, the step of controlling the operation of the air mixing valve and the air exhaust valve according to the temperature value includes: and when the load rate is greater than or equal to the second load threshold, the temperature value is less than the second temperature threshold, and the humidity value is less than the first humidity threshold, controlling the air mixing valve and the exhaust valve to work according to the temperature value and the humidity value.
In this technical scheme, if the load factor of the equipment in the machine room is greater than or equal to the second load threshold, it indicates that the load factor of the equipment in the machine room is higher at this time, that is, it indicates that the heat generated by the equipment in the machine room is more, that is, it indicates that the machine room has a higher cooling demand. However, the temperature value of the outdoor environment is smaller than the second temperature threshold value, which indicates that the outdoor fresh air has certain cooling capacity and can basically meet the cooling requirement of the machine room. When the humidity value is smaller than the first humidity threshold value, the outdoor fresh air cannot meet the humidity requirement of the machine room. Therefore, at this time, the machine room has regulation needs for both humidity and temperature, but the two do not have priority. Therefore, the humidity value and the temperature value of the outdoor environment can be comprehensively considered, and the opening degree of the fresh air valve and the opening degree of the air mixing valve can be adjusted simultaneously.
In any of the above technical solutions, the step of controlling the operation of the air mixing valve and the exhaust valve according to the temperature value and the humidity value specifically includes: increasing the opening of the air mixing valve; and/or decreasing the opening of the fresh air valve.
In the technical scheme, in the process of adjusting the operation of the air mixing valve and the exhaust valve by comprehensively considering the humidity value and the temperature value of the outdoor environment, if the requirement of the machine room on the humidity is stronger than the requirement on the temperature, the opening of the air mixing valve can be controlled to be increased, or the opening of the fresh air valve is controlled to be reduced, or the opening of the air mixing valve is controlled to be increased, and the opening of the fresh air valve is controlled to be reduced. Like this, can guarantee to enter into the air in the computer lab in the return air account for than bigger, and then guaranteed that the humidity of the air that enters into the computer lab satisfies the demands.
In any of the above technical solutions, the step of controlling the operation of the air mixing valve and the exhaust valve according to the temperature value and the humidity value specifically includes: reducing the opening of the air mixing valve; and/or increasing the opening of the fresh air valve.
In the technical scheme, in the process of adjusting the operation of the air mixing valve and the exhaust valve by comprehensively considering the humidity value and the temperature value of the outdoor environment, if the requirement of the machine room on the temperature is stronger than the requirement on the humidity, the opening of the air mixing valve can be controlled to be reduced, or the opening of the fresh air valve is controlled to be increased, or the opening of the air mixing valve is controlled to be reduced, and the opening of the fresh air valve is controlled to be increased. Therefore, the fresh air in the air entering the machine room can be ensured to occupy a larger area, and the temperature of the air entering the machine room is ensured to meet the requirement.
In any of the above technical solutions, a heat recovery device and a bypass component are disposed in the exhaust channel, and the control method of the evaporative cooling unit further includes: the bypass part is controlled to be closed so as to recover the heat of the exhaust channel through the heat recovery device.
In the technical scheme, a heat recovery device and a bypass component which are matched with each other are arranged in the exhaust channel. Wherein the bypass component is arranged between the heat recovery component and the inner wall of the exhaust channel.
In the process of controlling the operation of the evaporative cooling unit, if the heat recovery is required, the bypass component can be controlled to be closed, and the return air in the exhaust channel can pass through the heat recovery device. And the return air after the heat transfer has certain temperature, and this makes the return air can contact the heat transfer with heat recovery unit to realize thermal collection, and supply the heat of collecting in equipment such as water source heat pump set.
In addition, when the heat recovery requirement does not exist, the bypass component can be controlled to be opened, and the return air in the exhaust channel can pass through the bypass component and does not pass through the heat recovery device.
A second aspect of the present invention provides a control device for an evaporative cooling unit, including: a memory having a program stored thereon; and the processor can be used for executing programs so as to realize the control method of the evaporative cooling unit in any technical scheme.
The control device of the evaporative cooling unit provided by the invention can realize the control method of the evaporative cooling unit in any technical scheme when the degree stored by the memory of the control device is executed by the processor. Therefore, the control device of the evaporative cooling unit has all the advantages of the control method of the evaporative cooling unit, and is not discussed in detail herein.
Specifically, in the process of controlling the operation of the evaporative cooling unit, firstly, the load rate of equipment in a machine room (namely the racking rate of a server) is obtained, the temperature value and the humidity value of the outdoor environment are obtained, and the humidity and the temperature of fresh air entering an air inlet channel from a fresh air valve are judged; then, the load factor of equipment in the computer lab is taken into account comprehensively, the temperature value of outdoor environment and the humidity value of outdoor environment, air valve and the work of exhaust valve are mixed in the control, adjust the aperture of mixing air valve and exhaust valve, with the proportion of fresh air and return air in the air of assurance entering into the computer lab, and then the temperature and the humidity of the air of assurance entering into the computer lab are suitable, the air of assurance entering into the computer lab can not receive external adverse circumstances influence, and then guarantee the life of equipment in the computer lab, the overall structure who has guaranteed the evaporative cooling unit simultaneously simplifies.
A third aspect of the invention provides an evaporative cooling unit comprising: the air inlet channel is communicated with the machine room; the air exhaust channel is communicated with the machine room; the cooling device is arranged in the air inlet channel; the air mixing valve is communicated with the air inlet channel and the air exhaust channel; the fresh air valve is arranged at the air inlet of the air exhaust channel; the control device of the evaporative cooling unit according to the above technical scheme.
The evaporative cooling unit provided by the invention comprises the control device of the evaporative cooling unit in the technical scheme. Therefore, the evaporative cooling unit has all the advantages of the control method of the evaporative cooling unit, and the control method is not discussed in detail here.
In particular, the evaporative cooling unit may be applied to remote harsh environments. The evaporative cooling unit comprises an air inlet channel and an air exhaust channel which are communicated with the machine room; the air inlet of the air inlet channel is provided with a fresh air valve, the cooling device is arranged in the air inlet channel, fresh air in a natural environment can enter the air inlet channel from the air inlet and enters the machine room after passing through the cooling device, and the storage environment arranged in the machine room is guaranteed by adjusting the temperature and humidity in the machine room. An air mixing valve is arranged between the air inlet channel and the air exhaust channel, and air after heat exchange with the machine room can enter the air inlet channel again through the air mixing valve or be directly exhausted through the air exhaust channel.
In any one of the above technical solutions, the evaporative cooling unit further includes: the heat recovery device is arranged in the exhaust channel; and the bypass component is arranged in the exhaust channel and is positioned between the heat recovery device and the inner wall of the exhaust channel.
In this technical scheme, set up heat reclamation device in the passageway of airing exhaust for heat reclamation device and the passageway hot air in airing exhaust fully contact, realized collecting the heat, the heat that obtains of collection can be applied to in equipment such as water source heat pump set, carries out heat compensation, can avoid thermal waste on the one hand, and on the other hand can promote the performance of equipment self such as water source heat pump set.
Furthermore, a bypass member is provided in the exhaust duct at a space between the heat recovery device and an inner wall of the exhaust duct. The bypass component is matched with the heat recovery device and is arranged at the same position in the exhaust channel, so that whether heat in the exhaust channel is collected or not can be selected by controlling the opening or closing of the bypass component, and the switching of different running modes of the evaporative cooling unit is realized.
And when the heat in the exhaust channel is not required to be collected, the airflow in the exhaust channel directly passes through the bypass component, so that the wind resistance of the heat recovery device in the exhaust channel can be reduced, the smooth flow of hot air in the exhaust channel is ensured, and the efficient cooling of the machine room by the cooling system is further ensured.
In any one of the above technical solutions, the evaporative cooling unit further includes: and the water source heat pump unit is communicated with the heat recovery device, and the heat recovery device can be used for supplying heat to the water source heat pump unit.
In the technical scheme, the evaporation cooling unit further comprises a water source heat pump unit matched with the cooling system, and the water source heat pump unit is communicated with the heat recovery device. Wherein, the water source heat pump unit needs to heat in the operation process to ensure the performance of the water source heat pump unit. Therefore, the evaporative cooling unit skillfully matches the water source heat pump unit with the cooling system, and skillfully links the water source heat pump unit with the cooling system through the heat recovery device.
In the operation process of the evaporative cooling unit, the heat recovery device is in full contact with hot air in the exhaust channel, so that heat collection is realized; the collected heat can be directly supplied to the water source heat pump unit for heat supply, so that the heating capacity of the water source heat pump unit is improved, and the working performance of the water source heat pump unit is improved.
A fourth aspect of the present invention provides a readable storage medium, on which a program is stored, which, when being processed and executed, implements the control method of the evaporative cooling unit according to any one of the above-mentioned technical solutions.
The readable storage medium provided by the invention, when being executed, stores the program, and can realize the control method of the evaporative cooling unit according to any one of the above technical schemes. Therefore, the overall beneficial effects of the control method of the evaporative cooling unit are not discussed in detail.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view of an evaporative cooling unit according to one embodiment of the present invention;
FIG. 2 is a flow chart of a method of controlling an evaporative cooling unit in accordance with one embodiment of the present invention;
FIG. 3 is a flow chart of a method of controlling an evaporative cooling unit in accordance with a further embodiment of the present invention;
FIG. 4 is a flow chart of a method of controlling an evaporative cooling unit in accordance with a further embodiment of the present invention;
FIG. 5 is a flow chart of a method of controlling an evaporative cooling unit in accordance with a further embodiment of the present invention;
FIG. 6 is a block diagram of a control device for an evaporative cooling unit in accordance with one embodiment of the present invention;
fig. 7 is an iso-humidity control chart adopted in the control method of the evaporative cooling unit according to the embodiment of the present invention.
Wherein, the corresponding relation between the reference numbers and the part names in fig. 1 is:
100 machine rooms, 102 equipment, 104 air inlet channels, 106 air outlet channels, 108 temperature reduction devices, 110 first fans, 112 filtering devices, 114 heat recovery devices, 116 bypass components, 118 second fans, 120 air mixing valves, 122 fresh air valves, 124 exhaust valves, 126 water source heat pump units and 128 energy storage tanks.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
The evaporative cooling unit and the control method, device and readable storage medium thereof according to some embodiments of the present invention are described below with reference to fig. 1 to 7. In fig. 1, arrows indicate the direction of airflow; wherein, X represents the air inlet point of the fresh air, C represents the air outlet point of the return air, D represents the mixed air point of the fresh air and the return air, and A represents the air supply point of the mixed air.
As shown in fig. 1, the present invention provides an evaporative cooling unit, which can be used for cooling and humidifying a machine room 100 and can be applied to remote severe environments. The evaporative cooling unit comprises an air inlet channel 104 and an air outlet channel 106 which are communicated with the machine room 100; the air inlet of the air inlet channel 104 is provided with a fresh air valve 122, the cooling device 108 is arranged in the air inlet channel 104, fresh air in a natural environment can enter the air inlet channel 104 from the air inlet and enter the machine room 100 after passing through the cooling device 108, so that the temperature and the humidity inside the machine room 100 can be adjusted, and the storage environment arranged inside the machine room 100 can be ensured.
In addition, a mixing valve 120 is disposed between the air inlet channel 104 and the air outlet channel 106, and air after heat exchange with the machine room 100 can enter the air inlet channel 104 again through the mixing valve 120 or be directly discharged through the air outlet channel 106.
A first embodiment of the present invention provides a control method for an evaporative cooling unit, which is applicable to the evaporative cooling unit. As shown in fig. 2, the method for controlling an evaporative cooling unit includes:
step 202, acquiring the load rate of equipment in a machine room;
step 204, acquiring a temperature value and a humidity value of the outdoor environment;
and step 206, controlling the air mixing valve and the exhaust valve to work according to the load rate, the temperature value and the humidity value.
The control method of the evaporative cooling unit provided by the embodiment can be applied to the evaporative cooling unit in a remote severe environment. Specifically, the evaporative cooling unit comprises an air inlet channel and an air exhaust channel which are communicated with the machine room; the air inlet of the air inlet channel is provided with a fresh air valve, the cooling device is arranged in the air inlet channel, fresh air in a natural environment can enter the air inlet channel from the air inlet and enters the machine room after passing through the cooling device, and the storage environment arranged in the machine room is guaranteed by adjusting the temperature and humidity in the machine room. An air mixing valve is arranged between the air inlet channel and the air exhaust channel, and air after heat exchange with the machine room can enter the air inlet channel again through the air mixing valve or be directly exhausted through the air exhaust channel.
Particularly, in the process of controlling the operation of the evaporative cooling unit, the load rate of the equipment in the machine room (that is, the rack-up rate of the server) is firstly obtained, the temperature value and the humidity value of the outdoor environment are obtained, and the humidity and the temperature of the fresh air entering the air inlet channel from the fresh air valve are judged. Then, the load factor of equipment in the computer lab, the temperature value of outdoor environment and the humidity value of outdoor environment are taken into comprehensive consideration, air valve and the work of exhaust valve are mixed in the control, the aperture of air valve and exhaust valve is mixed in the regulation to the proportion of new trend and return air in the air of assurance entering into the computer lab, and then the temperature and the humidity of the air of assurance entering into the computer lab are suitable, and the air of assurance entering into the computer lab can not receive external adverse circumstances influence, and then guarantees the life of equipment in the computer lab.
Specifically, if the load rate of the equipment in the machine room is less than or equal to the first load threshold, it indicates that the load rate of the equipment in the machine room is low at this time, that is, it indicates that the heat generated by the equipment in the machine room during operation is less, that is, it indicates that the requirement of the machine room for cooling is not high. At this moment, if the temperature value is smaller than the first temperature threshold value, the outdoor fresh air has certain cooling capacity, and the cooling requirement of the machine room can be basically met. Therefore, in this case, the humidity in the machine room is preferentially adjusted, and when the humidity in the machine room meets the requirement, the temperature in the machine room is adjusted.
Specifically, if the load rate of the equipment in the machine room is greater than or equal to the second load threshold, it indicates that the load rate of the equipment in the machine room is higher at this time, that is, it indicates that more heat is generated in the machine room due to the operation of the equipment, and that is, it indicates that the requirement of the machine room for cooling is higher. At this time, if the temperature value is greater than or equal to the second temperature threshold value, it indicates that the temperature of the outdoor fresh air is also high, and the cooling requirement of the machine room cannot be met. Therefore, in this case, if the humidity value of the outdoor environment is smaller than the first humidity threshold, it indicates that the machine room needs to be further humidity-adjusted. Therefore, in this case, the temperature in the machine room is preferentially adjusted, and when the temperature in the machine room satisfies the requirement, the humidity in the machine room is adjusted.
Specifically, the evaporative cooling unit is an open refrigeration system, fresh air directly enters a machine room, and control of the humidity and cleanliness of the machine room is a difficult point. When the load of a machine room is low (the rack-loading rate of a server is not high) and the ambient temperature and humidity are low, the absolute moisture content of fresh air is very small, the temperature is low, and the humidity is difficult to improve and the target humidity is achieved by spraying.
Therefore, the load factor of equipment in the computer lab is judged at first to this embodiment, then the load factor of equipment in the computer lab is considered comprehensively, the temperature value of outdoor environment and the humidity value of outdoor environment, adjust air mixing valve and exhaust valve aperture, in order to guarantee the mixed proportion of new trend and return air, the self-adaptation of evaporative cooling unit has been realized, make the control unit can be based on actual environment self-control, especially under the low-load low temperature low humidity's the condition, can stable control computer lab humidity under the low temperature low humidity of thermal compensation power dissipation of not increasing, humidity and temperature in the computer lab have been guaranteed, the overall structure of evaporative cooling unit has been guaranteed simultaneously and has been simplified. In addition, the control method of the evaporative cooling unit provided by the embodiment can preferentially adjust the humidity or the temperature in the machine room under different conditions, so as to ensure the comprehensive effect of the temperature and the humidity in the machine room.
In addition, it should be specially explained that the temperature of the fresh air outside enters the machine room to exchange heat with the equipment, and then the temperature of the fresh air is raised. Therefore, after the part of return air enters the air inlet channel again through the air mixing valve, the part of return air can be mixed with fresh air which just enters the air inlet channel from the fresh air valve, and the humidity and the temperature of the mixed air which enters the machine room can be adjusted by adjusting the proportion of the high-temperature return air and the low-temperature fresh air, so that the machine room is ensured to be at the appropriate environmental humidity and the appropriate environmental temperature.
A second embodiment of the present invention provides a method for controlling an evaporative cooling unit, which can be applied to the evaporative cooling unit. As shown in fig. 3, the method for controlling an evaporative cooling unit includes:
step 302, acquiring the load rate of equipment in a machine room;
step 304, acquiring a temperature value and a humidity value of the outdoor environment;
and step 306, controlling the air mixing valve to be in the maximum opening degree and controlling the fresh air valve to be in the minimum opening degree or to be closed when the load rate is smaller than or equal to the first load threshold, the temperature value is smaller than the first temperature threshold and the humidity value is smaller than the first humidity threshold.
In this embodiment, if the load rate of the equipment in the equipment room is less than or equal to the first load threshold, it indicates that the load rate of the equipment in the equipment room is low at this time, that is, it indicates that the heat generated by the equipment in the equipment room during operation is less, that is, it indicates that the equipment room does not have a high cooling demand. At this moment, if the temperature value is smaller than the first temperature threshold value, the outdoor fresh air has certain cooling capacity, and the cooling requirement of the machine room can be basically met.
Therefore, in this case, if the humidity value of the outdoor environment is smaller than the first humidity threshold, it indicates that the machine room needs to be further humidity-adjusted. Therefore, the air mixing valve and the exhaust valve are controlled to work according to the humidity value of the outdoor environment, and the humidity in the machine room is preferably ensured to meet the requirement.
In this embodiment, further, when it has been determined that outdoor fresh air can basically meet the cooling requirement of the machine room and the machine room needs to adjust the humidity more, the opening degree of the air mixing valve is adjusted to be the maximum, and the opening degree of the fresh air valve is adjusted to be the minimum, or the fresh air valve is directly controlled to be closed. At the moment, in the air entering the machine room, the return air occupies a higher proportion, and the humidity of the fresh air can be adjusted through the return air so as to ensure that the humidity of the air entering the machine room meets the requirement.
In this embodiment, further, if the load rate of the equipment in the equipment room is less than or equal to the first load threshold, it indicates that the load rate of the equipment in the equipment room is low at this time, that is, it indicates that the heat generated by the equipment in the equipment room during operation is less, that is, it indicates that the equipment room has a low cooling demand. If the humidity value of the outdoor environment is larger than or equal to the first humidity threshold value, the humidity value of the outdoor fresh air basically meets the requirement of the machine room on the humidity. If the temperature value is greater than or equal to the first temperature threshold value, the fresh air needs to be cooled to a certain degree.
Therefore, at this time, the machine room has regulation needs for both humidity and temperature, but the two do not have priority. Therefore, the humidity value and the temperature value of the outdoor environment can be comprehensively considered, and the opening degree of the fresh air valve and the opening degree of the air mixing valve can be adjusted simultaneously.
In a specific embodiment, the first temperature threshold may be set according to actual conditions, and generally the first temperature threshold is smaller.
In a specific embodiment, the first load threshold may be set according to actual situations, and may be, for example, 10%, 20%, 30%, 40%, 50%, 60%, etc., and generally the first load threshold is set to be smaller.
A third embodiment of the present invention provides a control method for an evaporative cooling unit, which can be applied to the evaporative cooling unit. As shown in fig. 4, the method for controlling an evaporative cooling unit includes:
step 402, acquiring the load rate of equipment in a machine room;
step 404, acquiring a temperature value and a humidity value of the outdoor environment;
and step 406, controlling the air mixing valve to be at the minimum opening or closed and controlling the fresh air valve to be at the maximum opening when the load rate is greater than or equal to the second load threshold and the temperature value is greater than or equal to the second temperature threshold.
In this embodiment, if the load rate of the equipment in the equipment room is greater than or equal to the second load threshold, it indicates that the load rate of the equipment in the equipment room is higher at this time, that is, it indicates that more heat is generated in the equipment room due to the operation of the equipment, that is, it indicates that the equipment room has a higher cooling demand. At this time, if the temperature value is greater than or equal to the second temperature threshold value, it indicates that the temperature of the outdoor fresh air is also high, and the cooling requirement of the machine room cannot be met. In particular, the second load threshold is greater than the first load threshold. Specifically, the second temperature threshold is greater than the first temperature threshold.
Therefore, in this case, if the humidity value of the outdoor environment is smaller than the first humidity threshold, it indicates that the machine room needs to be further humidity-adjusted. Therefore, in this case, it means that the room is more in need of temperature reduction. That is, the air mixing valve and the exhaust valve are controlled to work according to the temperature value of the outdoor environment, and the temperature in the machine room is preferably guaranteed to meet the requirement.
In the embodiment, further, when it is judged that the air mixing valve and the exhaust valve are controlled to work according to the temperature value of the outdoor environment and the temperature in the machine room is preferentially ensured to meet the requirement, the opening degree of the air mixing valve is adjusted to be minimum or the air mixing valve is directly closed, and meanwhile, the opening degree of the new air valve is adjusted to be maximum.
At the moment, the fresh air occupies a higher proportion in the air entering the machine room, and the temperature of the return air can be reduced through the fresh air so as to ensure that the temperature of the air entering the machine room meets the requirement.
In this embodiment, further, if the load rate of the equipment in the equipment room is greater than or equal to the second load threshold, it indicates that the load rate of the equipment in the equipment room is higher, that is, it indicates that more heat is generated in the equipment room due to the operation of the equipment, that is, it indicates that the equipment room has a higher cooling demand.
However, the temperature value of the outdoor environment is smaller than the second temperature threshold value, which indicates that the outdoor fresh air has certain cooling capacity and can basically meet the cooling requirement of the machine room. When the humidity value is smaller than the first humidity threshold value, the outdoor fresh air cannot meet the humidity requirement of the machine room.
Therefore, at this time, the machine room has regulation needs for both humidity and temperature, but the two do not have priority. Therefore, the humidity value and the temperature value of the outdoor environment can be comprehensively considered, and the opening degree of the fresh air valve and the opening degree of the air mixing valve can be adjusted simultaneously.
In a specific embodiment, the second load threshold is greater than the first load threshold, and a specific value thereof may be set according to an actual situation, for example, may be 70%, 80%, 90%, and the like, and generally the second load threshold is set to be larger.
In a specific embodiment, the second temperature threshold may be set according to actual conditions, and generally the second temperature threshold is set to be a little larger than the first temperature threshold.
In any of the above embodiments, in the process of adjusting the operation of the air mixing valve and the exhaust valve by comprehensively considering the humidity value and the temperature value of the outdoor environment, if the requirement of the machine room for humidity is stronger than the requirement for temperature, the opening of the air mixing valve may be controlled to increase, or the opening of the fresh air valve may be controlled to decrease, or the opening of the air mixing valve may be controlled to increase, and the opening of the fresh air valve may be controlled to decrease. Like this, can guarantee to enter into the air in the computer lab in the return air account for than bigger, and then guaranteed that the humidity of the air that enters into the computer lab satisfies the demands.
In any of the above embodiments, in the process of adjusting the operation of the air mixing valve and the exhaust valve by comprehensively considering the humidity value and the temperature value of the outdoor environment, if the temperature requirement of the machine room is stronger than the humidity requirement, the opening degree of the air mixing valve may be controlled to decrease, or the opening degree of the fresh air valve may be controlled to increase, or the opening degree of the fresh air valve may be controlled to decrease, and the opening degree of the fresh air valve may be controlled to increase. Therefore, the fresh air in the air entering the machine room can be ensured to occupy a larger area, and the temperature of the air entering the machine room is ensured to meet the requirement.
A fourth embodiment of the present invention provides a method for controlling an evaporative cooling unit, which is applicable to an evaporative cooling unit having an exhaust duct in which a heat recovery device and a bypass member are provided for use in cooperation. As shown in fig. 5, the method for controlling an evaporative cooling unit includes:
502, acquiring the load rate of equipment in a machine room;
step 504, acquiring a temperature value and a humidity value of the outdoor environment;
step 506, controlling the air mixing valve and the exhaust valve to work according to the load rate, the temperature value and the humidity value;
and step 508, controlling the bypass component to be closed so as to recover the heat of the exhaust channel through the heat recovery device.
In the process of controlling the operation of the evaporative cooling unit, if the heat recovery is required, the bypass component can be controlled to be closed, and the return air in the exhaust channel can pass through the heat recovery device. And the return air after the heat transfer has certain temperature, and this makes the return air can contact the heat transfer with heat recovery unit to realize thermal collection, and supply the heat of collecting in equipment such as water source heat pump set.
In addition, when the heat recovery requirement does not exist, the bypass component can be controlled to be opened, and the return air in the exhaust channel can pass through the bypass component and does not pass through the heat recovery device.
As shown in fig. 6, a fifth embodiment of the present invention provides a control device 600 for an evaporative cooling unit, which includes a memory 602 and a processor 604.
When the degree stored in the memory 602 is executed by the processor 604, the method for controlling the evaporative cooling unit according to any of the above-described technical solutions can be implemented. Therefore, the control device 600 of the evaporative cooling unit also has all the advantages of the control method of the evaporative cooling unit, and is not discussed here.
Specifically, in the process of controlling the operation of the evaporative cooling unit, the load rate of the equipment 102 in the machine room (that is, the rack-up rate of the server) is obtained first, the temperature value and the humidity value of the outdoor environment are obtained, and the humidity and the temperature of the fresh air entering the air inlet channel from the fresh air valve are judged.
Then, the load factor of equipment 102 in the computer lab is considered comprehensively, the temperature value of outdoor environment and the humidity value of outdoor environment, control is mixed blast gate and exhaust valve work, adjust the aperture of mixing blast gate and exhaust valve, with the proportion of fresh air and return air in the air of assurance entering into the computer lab, and then the temperature and the humidity of the air of assurance entering into the computer lab are suitable, the air of assurance entering into the computer lab can not receive external adverse circumstances influence, and then guarantee the life of equipment 102 in the computer lab, the overall structure who has guaranteed the evaporative cooling unit simultaneously is simplified.
As shown in fig. 1, a sixth embodiment of the present invention provides an evaporative cooling unit including the control device of the evaporative cooling unit according to the fifth embodiment. Therefore, the evaporative cooling unit has all the advantages of the control method of the evaporative cooling unit, and the control method is not discussed in detail here.
In particular, the evaporative cooling unit may be applied to remote harsh environments. The evaporative cooling unit comprises an air inlet channel 104 and an air outlet channel 106 which are communicated with the machine room 100; the air inlet of the air inlet channel 104 is provided with a fresh air valve 122, the cooling device 108 is arranged in the air inlet channel 104, fresh air in a natural environment can enter the air inlet channel 104 from the air inlet and enter the machine room 100 after passing through the cooling device 108, so that the temperature and the humidity inside the machine room 100 can be adjusted, and the storage environment arranged inside the machine room 100 can be ensured.
In addition, as shown in fig. 1, an air mixing valve 120 is disposed between the air intake duct 104 and the air exhaust duct 106, and air after heat exchange with the machine room 100 can enter the air intake duct 104 again through the air mixing valve 120 or be directly exhausted through the air exhaust duct 106.
Particularly, based on the setting of the control device of the evaporative cooling unit, in the process of controlling the operation of the evaporative cooling unit, the load rate of the equipment 102 in the machine room 100 (that is, the rack-up rate of the server) is firstly obtained, the temperature value and the humidity value of the outdoor environment are obtained, and the humidity and the temperature of the fresh air entering the air inlet channel 104 from the fresh air valve 122 are judged.
Then, the load factor of the equipment 102 in the machine room 100, the temperature value of the outdoor environment and the humidity value of the outdoor environment are comprehensively considered, the air mixing valve 120 and the exhaust valve 124 are controlled to work, the opening degrees of the air mixing valve 120 and the exhaust valve 124 are adjusted to ensure the proportion of fresh air and return air in the air entering the machine room 100, the temperature and the humidity of the air entering the machine room 100 are appropriate, the air entering the machine room 100 is ensured not to be influenced by the external severe environment, and the service life of the equipment 102 in the machine room 100 is ensured.
In this embodiment, as shown in fig. 1, the heat recovery device 114 is disposed in the exhaust duct 106, so that the heat recovery device 114 is in full contact with hot air in the exhaust duct 106, heat collection is achieved, and the collected heat can be applied to the equipment 102 such as the water source heat pump unit 126 for heat compensation, which can avoid waste of heat and improve performance of the equipment such as the water source heat pump unit 126.
Further, as shown in fig. 1, a bypass member 116 is provided in the exhaust duct 106 at a space between the heat recovery device 114 and an inner wall of the exhaust duct 106. The bypass component 116 is matched with the heat recovery device 114 and is arranged at the same position in the exhaust channel 106, so that whether heat in the exhaust channel 106 is collected or not can be selected by controlling the opening or closing of the bypass component 116, and the switching of different operating modes of the evaporative cooling unit is realized.
Moreover, when the heat in the exhaust channel 106 does not need to be collected, the airflow in the exhaust channel 106 directly passes through the bypass component 116, so that the wind resistance of the heat recovery device 114 in the exhaust channel 106 can be reduced, the smooth flow of hot air in the exhaust channel 106 is ensured, and the efficient cooling of the machine room 100 by the cooling system is further ensured.
In this embodiment, as shown in fig. 1, the evaporative cooling unit further includes a water source heat pump unit 126 used in cooperation with the cooling system, and the water source heat pump unit 126 is communicated with the heat recovery device 114. Wherein, the water source heat pump unit 126 needs to heat during the operation process to ensure the performance of the water source heat pump unit 126 itself. Therefore, the evaporative cooling unit provided by the invention skillfully matches the water source heat pump unit 126 with the cooling system, and skillfully links the water source heat pump unit 126 with the cooling system through the heat recovery device 114.
In the operation process of the evaporative cooling unit, the heat recovery device 114 is in full contact with hot air in the exhaust passage 106, so that heat collection is realized; the collected heat can be directly supplied to the water source heat pump unit 126 for heating, thereby improving the heating capacity of the water source heat pump unit 126 and the working performance of the water source heat pump unit 126.
In one embodiment, as shown in FIG. 1, the heat recovery device 114 is a coiled pipe and is connected to the water source heat pump unit 126 through a pipeline.
In a particular embodiment, as shown in FIG. 1, the bypass member 116 is a bypass damper.
In a specific embodiment, as shown in fig. 1, the cooling device 108 is an evaporative cooling module and can spray liquid during operation to absorb heat through evaporation of the liquid for cooling.
A seventh embodiment of the present invention proposes a readable storage medium on which a program is stored.
The invention provides a readable storage medium, and a program stored on the readable storage medium can realize the control method of the evaporative cooling unit according to any one of the above embodiments when the program is executed. Therefore, the overall beneficial effects of the control method of the evaporative cooling unit are not discussed in detail.
Specifically, in the process of controlling the operation of the evaporative cooling unit, the load rate of the equipment 102 in the machine room (that is, the rack-up rate of the server) is obtained first, the temperature value and the humidity value of the outdoor environment are obtained, and the humidity and the temperature of the fresh air entering the air inlet channel from the fresh air valve are judged.
Then, the load factor of the equipment 102 in the machine room, the temperature value of the outdoor environment and the humidity value of the outdoor environment are comprehensively considered, the air mixing valve and the exhaust valve are controlled to work, the opening degrees of the air mixing valve and the exhaust valve are adjusted to ensure the proportion of fresh air and return air in the air entering the machine room, the temperature and the humidity of the air entering the machine room are ensured to be appropriate, the air entering the machine room is ensured not to be influenced by the external severe environment, and the service life of the equipment 102 in the machine room is ensured.
With the development of new capital construction 5G, the construction of the data center is increased explosively, the energy consumption of the data center is huge, and the refrigeration energy consumption of a machine room accounts for more than 40% of the total energy consumption of the data center. In order to save energy, data centers are increasingly built in regions with lower environmental temperature and humidity such as northwest, northeast, cloud and the like, natural cold sources are fully utilized to refrigerate the data centers, direct evaporative cooling technology is mostly adopted in regions with relatively suitable air environments (low temperature, low humidity and high cleanliness), machine rooms refrigerate by directly utilizing outdoor low-temperature fresh air, and when dry-bulb temperature is higher, low wet-bulb temperature is utilized, low-temperature air is obtained by water spraying evaporation cooling, and the data centers are cooled.
Particularly, the evaporative cooling unit is an open type refrigeration system, fresh air directly enters a machine room, and control of the humidity and cleanliness of the machine room is a difficult point. Particularly, when the load of a machine room is low (when the racking rate of a server is not high) and the ambient temperature and humidity are low, the absolute moisture content of fresh air is very low, the temperature is also low, and the humidity is difficult to improve and reach the target humidity by spraying.
The invention provides a control method of an evaporative cooling unit, which achieves the aim of controlling the humidity of a machine room 100 by adjusting the opening degrees of a fresh air valve 122, a mixed air valve 120 and an exhaust air valve 124 in a self-adaptive manner under the condition that the power consumption of equipment 102 is not increased.
In the embodiment, as shown in fig. 1, the evaporative cooling unit includes an air intake duct 104 and an air exhaust duct 106 communicated with the machine room 100, an air intake of the air intake duct 104 is provided with a fresh air valve 122, an air exhaust of the air exhaust duct 106 is provided with an air exhaust valve 124, and an air mixing valve 120 is disposed between the air intake duct 104 and the air exhaust duct 106. A first fan 110, a cooling device 108 and a filtering device 112 are sequentially arranged along the air inlet direction of the air inlet channel 104; along the exhaust direction of the exhaust duct 106, a cooperatively adapted heat recovery device 114 and a bypass member 116, a second fan 118, and a mixing valve 120 are provided. In addition, the heat recovery device 114 is connected to the water source heat pump unit 126 through a pipeline, and can supply the collected heat to the water source heat pump unit 126; the water source heat pump unit 126 is communicated with the energy storage tank 128.
If the temperature value in the control room 100 is T1 and the relative humidity is a%, the absolute humidity corresponding to the air can be queried to be d. For example, as can be seen from fig. 1 and 7, if the temperature and humidity point of the room 100 is controlled to be point C, and 35 ℃/24% RH, the moisture content of the corresponding air is 0.01348kg/kg. dry air (altitude 3650 m). After being processed by the cooling device 108, the fresh air enters the machine room 100 for refrigeration, namely, the air is heated by equal humidity, and the temperature is raised, wherein the humidity point of the return air is C. According to the equal humidity principle, the absolute moisture content is not changed, and the design parameters of the humidity point A of the mixed air can be obtained.
As shown in fig. 7, the fresh air at the point X and the return air at the point C are mixed in a certain proportion to obtain mixed air at the point D, and the mixed air at the point D is high-temperature and low-humidity; mixed air at the point A is obtained by atomization isenthalpic humidification, the mixed air at the point A is sent into the machine room 100 and is heated into return air at the point C through the equipment 102, and the return air from the mixed air at the point A to the point C also belongs to an equal-humidity temperature rise process. According to the design requirement of the outlet air temperature and humidity of the mixed air at the point A, the fresh air at the point X is mixed with the return air at the point C, and the mass ratio of the mixed air at the point A is calculated according to the following formula: Gx/Gc ═ dd-dc)/(dx-dd). Wherein dx is the moisture content of the fresh air, dc is the moisture content of the return air, dd is the moisture content of the mixed air, and Gx/Gc is the ratio of the fresh air to the return air.
In an exemplary embodiment, as shown in FIG. 1, the heat recovery direct evaporative cooling unit includes a temperature reduction device 108 and a heat recovery device 114. As shown in fig. 1, one side of the air intake channel 104 includes a fresh air section, an air mixing section, a filtering section, an evaporative cooling section, and an air supply section, the air intake is provided with a fresh air valve 122, and an air mixing valve 120 is provided between the air intake channel 104 and the air exhaust channel 106. The heat recovery device 114 is used in conjunction with a bypass member 116. The cooling device 108 is connected with the heat recovery device 114, and supplies the heat or cold absorbed by the heat recovery device 114 to the agricultural greenhouse.
In a specific embodiment, when the load rate of the equipment 102 in the machine room 100 is high, temperature priority or automatic control is executed to meet the heat and humidity load control requirement of the machine room 100. When the heat load of the machine room 100 is low and the outdoor environment temperature is low, the absolute moisture content in the fresh air is very low, and due to the low temperature, the difficulty in improving the absolute moisture content of the air through water spraying humidification is high, the common practice in the industry is to heat the fresh air through a water heating coil or electric heating, and achieve humidity control through evaporation humidification.
The invention adopts a return air heating and temperature rising measure, and controls the proportion of fresh air and return air by automatically adjusting the development of the exhaust valve 124, the air mixing valve 120 and the fresh air valve 122 according to the principle of priority of humidity, thereby achieving the designed absolute moisture content of supplied air and controlling the humidity.
Therefore, the control method of the evaporative cooling unit provided by the invention can improve the humidity supplement capability of the evaporative cooling unit by mixing air and raising the temperature, can control the relative humidity of the machine room by supplying air with absolute moisture content, ensures that the temperature and the humidity of the internal environment of the machine room are proper, is particularly suitable for regions with low environmental temperature and humidity such as northwest, northeast, cloud and the like, and has strong adaptability.
In addition, the control method of the evaporative cooling unit provided by the invention not only can realize the cooling of the machine room, but also can collect the heat in the machine room and supply the part of heat to the equipment 102 such as the water source heat pump unit, and the like, thereby improving the performance of the equipment 102 such as the water source heat pump unit and the like; and moreover, the cold air can be ensured to flow smoothly in the air inlet channel, and particularly when the evaporative cooling unit does not need to operate a heat recovery mode, the cold air can be ensured to flow smoothly, so that the efficient cooling of the machine room by the cooling system is ensured.
In the specific embodiment, in the using process, when the outdoor environment temperature is detected to be less than a set value, the evaporative cooling unit automatically enters a heat recovery mode, and at the moment, the bypass component is intelligently closed; when detecting that outdoor ambient temperature is greater than or equal to the setting value, the evaporative cooling unit exits the heat recovery mode automatically, and bypass part intelligence is opened this moment, lets the computer lab exhaust hot-air mainly discharge through bypass part.
In the specific embodiment, as shown in fig. 1, the air intake channel 104 sequentially includes an air mixing section, a filtering section and an air supply section which are communicated with each other along the air intake direction of the air intake channel. Wherein, the air mixing section is provided with an air mixing valve 120, and the air mixing valve 120 can conduct the air exhaust channel 106 and the air intake channel 104 when opened; a filtering device 112 is arranged in the filtering section; a first fan 110 and a cooling device 108 are arranged in the air supply section.
In a particular embodiment, as shown in FIG. 1, a room 100 has a room and a return air layer. Wherein, the room is provided with equipment 102, and the air inlet channel 104 is communicated with the room; the air return layer is formed on the top of the room and is positioned on the ceiling of the room, and the air return layer is communicated with the exhaust channel 106.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (13)

1. The control method of the evaporative cooling unit is characterized in that the evaporative cooling unit comprises an air inlet channel and an air exhaust channel which are communicated with a machine room, an air inlet of the air inlet channel is provided with a fresh air valve, a cooling device is arranged in the air inlet channel, an air mixing valve is arranged between the air inlet channel and the air exhaust channel, and the control method of the evaporative cooling unit comprises the following steps:
acquiring the load rate of the equipment in the machine room;
acquiring a temperature value and a humidity value of an outdoor environment;
controlling the air mixing valve and the exhaust valve to work according to the load factor, the temperature value and the humidity value so as to adjust the humidity and the temperature in the machine room;
when the load rate is less than or equal to a first load threshold, the temperature value is less than a first temperature threshold, and the humidity value is less than a first humidity threshold, preferentially adjusting the humidity in the machine room; and when the load rate is greater than or equal to a second load threshold value, the temperature value is smaller than a second temperature threshold value, and the humidity value is smaller than a first humidity threshold value, preferentially adjusting the temperature in the machine room.
2. The evaporative cooling unit control method according to claim 1,
and when the load rate is less than or equal to a first load threshold value, the temperature value is less than a first temperature threshold value, and the humidity value is less than a first humidity threshold value, controlling the air mixing valve to be in the maximum opening degree, and controlling the fresh air valve to be in the minimum opening degree or closed.
3. The evaporative cooling unit control method according to claim 1,
and when the load factor is less than or equal to a first load threshold value, the temperature value is greater than or equal to a first temperature threshold value, and the humidity value is greater than or equal to a first humidity threshold value, controlling the air mixing valve and the exhaust valve to work according to the temperature value and the humidity value.
4. The evaporative cooling unit control method according to claim 1,
and when the load rate is greater than or equal to a second load threshold value and the temperature value is greater than or equal to a second temperature threshold value, controlling the air mixing valve to be at the minimum opening or closed, and controlling the fresh air valve to be at the maximum opening.
5. The method for controlling the evaporative cooling unit as set forth in claim 1, wherein the step of controlling the operation of the air mixing valve and the air exhaust valve according to the temperature value includes:
when the load factor is larger than or equal to a second load threshold value, the temperature value is smaller than a second temperature threshold value, and the humidity value is smaller than a first humidity threshold value, the air mixing valve and the exhaust valve are controlled to work according to the temperature value and the humidity value.
6. The method for controlling an evaporative cooling unit according to claim 3 or 5, wherein the step of controlling the operation of the air mixing valve and the air exhaust valve according to the temperature value and the humidity value specifically comprises:
increasing the opening degree of the air mixing valve; and/or
And reducing the opening degree of the fresh air valve.
7. The method for controlling an evaporative cooling unit according to claim 3 or 5, wherein the step of controlling the operation of the air mixing valve and the air exhaust valve according to the temperature value and the humidity value specifically comprises:
reducing the opening of the air mixing valve; and/or
And increasing the opening degree of the fresh air valve.
8. The evaporative cooling unit control method according to any one of claims 1 to 5, wherein a heat recovery device and a bypass member are provided in the exhaust passage, the evaporative cooling unit control method further comprising:
and controlling the bypass component to be closed so as to recover the heat of the exhaust channel through the heat recovery device.
9. A control device for an evaporative cooling unit, comprising:
a memory having a program stored thereon;
a processor operable to execute the program to implement the method of controlling an evaporative cooling unit as claimed in any one of claims 1 to 8.
10. An evaporative cooling unit, can be used to computer lab, its characterized in that includes:
the air inlet channel is communicated with the machine room;
the air exhaust channel is communicated with the machine room;
the cooling device is arranged in the air inlet channel;
the air mixing valve is communicated with the air inlet channel and the air exhaust channel;
the fresh air valve is arranged at the air inlet of the air exhaust channel;
a control device for an evaporative cooling unit as set forth in claim 9.
11. The evaporative cooling unit of claim 10, further comprising:
the heat recovery device is arranged in the exhaust channel;
and the bypass component is arranged in the exhaust channel and is positioned between the heat recovery device and the inner wall of the exhaust channel.
12. The evaporative cooling unit of claim 11, further comprising:
and the water source heat pump unit is communicated with the heat recovery device, and the heat recovery device can be used for supplying heat to the water source heat pump unit.
13. A readable storage medium, on which a program is stored, which when executed by a processor implements a method of controlling an evaporative cooling unit as claimed in any one of claims 1 to 8.
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