CN111059656B - Air conditioning system for underground command center and control method thereof - Google Patents

Air conditioning system for underground command center and control method thereof Download PDF

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Publication number
CN111059656B
CN111059656B CN201911171660.5A CN201911171660A CN111059656B CN 111059656 B CN111059656 B CN 111059656B CN 201911171660 A CN201911171660 A CN 201911171660A CN 111059656 B CN111059656 B CN 111059656B
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air
water pipe
pipe
unit
fresh air
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CN111059656A (en
Inventor
袁艳
张学伟
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Guangdong Shenling Environmental Systems Co Ltd
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Guangdong Shenling Environmental Systems Co Ltd
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Classifications

    • 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
    • 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
    • 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
    • F24F11/62—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
    • F24F11/65—Electronic processing for selecting an operating mode
    • 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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28—Arrangement or mounting of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/1405—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification in which the humidity of the air is exclusively affected by contact with the evaporator of a closed-circuit cooling system or heat pump circuit
    • 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
    • F24F5/0003—Exclusively-fluid systems
    • 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
    • F24F5/001—Compression cycle type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
    • 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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/40—Geothermal heat-pumps

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Central Air Conditioning (AREA)

Abstract

The invention discloses an air conditioning system for an underground command center and a control method thereof, wherein the air conditioning system comprises an air conditioning room, a controller, a cooling tower, an air exhaust unit, an exhaust pipe, an air inlet unit, an air inlet pipe, a fresh air processing unit, an air supply pipe, a classified cold water unit, a cooling water pipe, a first freezing water pipe and a second freezing water pipe, the cooling tower is connected with the classified cold water unit through the cooling water pipe, the fresh air processing unit is connected with the classified cold water unit through the cooling water pipe and the first freezing water pipe respectively, the classified cold water unit is connected with an air conditioner in the air conditioning room through the first freezing water pipe and the second freezing water pipe respectively, the air inlet unit is connected with the fresh air processing unit through the air inlet pipe, the fresh air processing unit is communicated with the air conditioning room, and the air exhaust unit is communicated with the underground command center; the grading cold water unit in the air conditioning system can simultaneously provide hot water and cold water with two different temperatures, and is convenient for the subarea adjustment of the underground command center.

Description

Air conditioning system for underground command center and control method thereof
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning system for an underground command center and a control method thereof.
Background
At present, the underground command center has large scale, and the longitudinal span and the transverse span of the space are large, so that the energy consumption for conveying air and water is high; in addition, the working conditions of all areas of the underground command center are different, the requirements on the environment are different, the running requirements of the air conditioners in different air conditioning rooms are also different, the air conditioners in some air conditioning rooms need to be kept in a working state of annual dehumidification, the local areas need to be refrigerated and cooled, and the local areas need to be heated, so that the air conditioning system of the underground command center can comprehensively solve the difficult problem of the air conditioning system of the underground command center, only the air conditioners in all areas and all air conditioning spaces can be adjusted and controlled in a scattered manner, the system is complex, and the engineering installation quantity is large.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an air conditioning system for an underground command center and a control method thereof, in which a staged cold water unit in the air conditioning system can simultaneously provide hot water and cold water of two different temperatures, so as to facilitate the zonal adjustment of the underground command center.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The utility model provides an air conditioning system for underground command center, includes air conditioning room and controller, an air conditioning system for underground command center still includes cooling tower, exhaust unit, exhaust pipe, air inlet unit, air-supply line, fresh air handling unit, blast pipe, hierarchical cold water unit, condenser tube, first freezing water pipe and second freezing water pipe, the cooling tower passes through the condenser tube is connected with hierarchical cold water unit, the fresh air handling unit passes through the condenser tube with first freezing water pipe is connected with hierarchical cold water unit respectively, hierarchical cold water unit passes through respectively first freezing water pipe and second freezing water pipe are connected with the air conditioner in the air conditioning room, the air inlet unit passes through the air-supply line is connected with fresh air handling unit, the fresh air handling unit passes through blast pipe and air conditioning room intercommunication, the exhaust unit passes through exhaust pipe and underground command center intercommunication.
In the air conditioning system for the underground command center, the exhaust unit comprises an exhaust fan and an exhaust diffusion chamber, the exhaust fan comprises a first exhaust pipe and a second exhaust pipe, the exhaust fan is communicated with the underground command center through the first exhaust pipe, and the exhaust fan is communicated with the exhaust diffusion chamber through the second exhaust pipe.
In the air conditioning system for the underground command center, the air inlet unit comprises an air inlet diffusion chamber and an air inlet machine, the air inlet pipe comprises a first air inlet pipe and a second air inlet pipe, the air inlet diffusion chamber is connected with the air inlet machine through the first air inlet pipe, and the air inlet machine is connected with the fresh air processing unit through the second air inlet pipe.
The air conditioning system for the underground command center comprises a fresh air processing unit and a blower, wherein the blower comprises a first blower pipe and a second blower pipe, the fresh air processing unit is connected with the classified cold water unit through a cooling water pipe and a first freezing water pipe respectively, the fresh air processing unit is connected with the blower through the first blower pipe, and the blower is communicated with an air conditioning room through the second blower pipe.
In the air conditioning system for the underground command center, the cooling water pipe comprises a first water pipe, a second water pipe, a third water pipe and a fourth water pipe, the first freezing water pipe comprises a fifth water pipe, a sixth water pipe and a seventh water pipe, and the second freezing water pipe comprises an eighth water pipe and a ninth water pipe.
In the air conditioning system for the underground command center, the classified cooling water unit comprises a cooling water tank, a freezing water tank and a classified cooling water mechanism, wherein the classified cooling water mechanism is connected with the cooling water tank through the first water pipe, the cooling water tank is connected with a high-temperature cooling tower through the second water pipe, the cooling water tank is connected with a fresh air treatment mechanism through the third water pipe, and the cooling water tank is connected with an air conditioner in an air conditioning room through the fourth water pipe; the classified cooling water mechanism is connected with a freezing water pool through the fifth water pipe and the eighth water pipe respectively, the freezing water pool is connected with the fresh air treatment mechanism through the sixth water pipe, and the freezing water pool is connected with an air conditioner in an air-conditioning room through the seventh water pipe and the ninth water pipe respectively.
In the air conditioning system for the underground command center, the fresh air treatment mechanism comprises a first compressor, a heating coil, a filter and a surface cooling coil which are sequentially connected in a head-tail pipeline mode, the heating coil is connected with a cooling water tank through a third water pipe, and the surface cooling coil is connected with a freezing water tank through a sixth water pipe.
In the air conditioning system for the underground command center, the classified cooling water mechanism comprises an evaporator, a first condenser, a second compressor, a third compressor, a first expansion valve and a second expansion valve, wherein the second compressor, the first condenser, the first expansion valve and the evaporator are sequentially connected end to end through pipelines, and the third compressor, the second condenser, the second expansion valve and the evaporator are sequentially connected end to end through pipelines; the first condenser and the second condenser are connected with the cooling water tank through a first water pipe, and the evaporator is connected with the cooling water tank through a fifth water pipe and an eighth water pipe respectively.
The invention also correspondingly provides a control method for the air conditioning system, which specifically comprises the following steps:
s100, presetting a preset value of indoor temperature in an air-conditioning room in a controller;
S200, a first temperature sensor arranged in the air inlet diffusion chamber detects an outdoor temperature value, a first humidity sensor arranged in the air inlet diffusion chamber detects an outdoor humidity value, and the first temperature sensor and the first humidity sensor feed back detection results to a controller;
S300, detecting an indoor temperature value by a second temperature sensor arranged in the air-conditioning room, detecting an indoor humidity value by a second humidity sensor arranged in the air-conditioning room, and feeding back detection results to the controller by the second temperature sensor and the second humidity sensor;
s400, the controller calculates an outdoor enthalpy value according to the outdoor temperature value and the outdoor humidity value, and calculates an indoor enthalpy value according to the indoor temperature value and the indoor humidity value;
S500, if the outdoor enthalpy value is larger than the indoor enthalpy value, executing the step S600, otherwise, executing the step S700;
S600, a fresh air processing mechanism starts a dehumidifying and cooling mode, a filter filters fresh air, a surface cooling coil dehumidifies and cools the fresh air, and a heating coil does not work;
And S700, starting a ventilation mode by the fresh air processing mechanism, filtering fresh air by a filter, and enabling the surface cooling coil and the heating coil not to work.
In the control method for the air conditioning system of the underground command center, the step S700 further includes the following steps:
S701, executing step S702 when the outdoor temperature value detected by the first temperature sensor is less than 5 ℃.
S702, a fresh air heating mode is started by the fresh air processing mechanism, fresh air is filtered by the filter, the fresh air is heated by the heating coil, and the surface cooling coil does not work.
The beneficial effects are that:
The invention provides an air conditioning system for an underground command center and a control method thereof, which have the following advantages:
(1) Compared with the air conditioning system in the prior art, the air conditioning system for underground command has the advantages that the structure is simple, the occupied space is small, the installation of the underground space is facilitated, the installation quantity of engineering is reduced, the installation efficiency is improved, and the installation cost is reduced;
(2) The hierarchical water chilling unit can provide hot water for the high-temperature cooling tower, the fresh air processing mechanism and the air conditioner in the air conditioning room, can also provide cold water for the fresh air processing mechanism and two different temperatures of cold water for the air conditioner in the air conditioning room, meets the requirements of working conditions in different areas of the underground command center and the running requirements of the air conditioner in different air conditioning rooms, and is convenient for the partition adjustment of the underground command center; and the pipe diameter of the conveying pipe is reduced, and the installation quantity and the conveying energy consumption of the engineering are reduced.
Drawings
FIG. 1 is a schematic diagram of an air conditioning system for an underground command center according to the present invention;
FIG. 2 is an enlarged view of portion A provided by the present invention;
FIG. 3 is a schematic diagram of a hierarchical cooling water mechanism provided by the invention;
FIG. 4 is a schematic diagram illustrating an operation of an air conditioning system according to the present invention;
FIG. 5 is an enlarged view of portion B provided by the present invention;
Fig. 6 is a control flow chart of the control method provided by the invention.
Description of main reference numerals: 1-cooling tower, 2-exhaust unit, 21-exhaust diffusion chamber, 22-exhaust fan, 3-air inlet unit, 31-air inlet diffusion chamber, 32-air inlet machine, 4-fresh air treatment unit, 41-first compressor, 42-heating coil, 43-filter, 44-surface cooling coil, 45-blower, 5-classified cold water unit, 51-cooling water tank, 52-chilled water tank, 53-classified cold water mechanism, 531-evaporator, 532-first condenser, 533-second condenser, 534-second compressor, 535-third compressor, 536-first expansion valve, 537-second expansion valve, 61-first water pipe, 62-second water pipe, 63-third water pipe, 64-fourth water pipe, 65-fifth water pipe, 66-sixth water pipe, 67-seventh water pipe, 68-eighth water pipe, 69-ninth water pipe.
Detailed Description
The invention provides an air conditioning system for an underground command center and a control method thereof, which are used for making the purposes, technical schemes and effects of the invention clearer and more definite, and the invention is further described in detail below by referring to the accompanying drawings and examples. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and the like should be construed broadly, unless otherwise specifically defined and limited, and that the specific meaning of the terms in the present invention may be understood by those skilled in the art in light of the specific circumstances.
Referring to fig. 1 to 5, the invention provides an air conditioning system for an underground command center, which comprises an air conditioning room and a controller, wherein the air conditioning system for the underground command center further comprises a cooling tower 1, an air exhaust unit 2, an air exhaust pipe, an air inlet unit 3, an air inlet pipe, a fresh air processing unit 4, an air supply pipe, a classified cold water unit 5, a cooling water pipe, a first freezing water pipe and a second freezing water pipe, the cooling tower 1 is connected with the classified cold water unit 5 through the cooling water pipe, the fresh air processing unit 4 is connected with the classified cold water unit 5 through the cooling water pipe and the first freezing water pipe respectively, the classified cold water unit 5 is connected with the air conditioning in the air conditioning room through the first freezing water pipe and the second freezing water pipe respectively, the air inlet unit 3 is connected with the fresh air processing unit 4 through the air inlet pipe, the fresh air processing unit 4 is communicated with the air conditioning room through the air supply pipe, and the air exhaust unit 2 is communicated with the underground command center through the air exhaust pipe.
The working principle of the air conditioning system of the invention is as follows: fresh air in the external environment is sent into a fresh air treatment unit 4 through an air inlet unit 3, the fresh air treatment unit 4 is used for treating the fresh air according to the environmental requirements of different air-conditioning rooms of an underground command center, the treated fresh air is sent into the air-conditioning rooms through an air supply pipe, a classified cold water unit 5 is used for providing hot water with the temperature of 50 ℃ for the fresh air treatment unit 4 through a cooling water pipe, cold water with the temperature of 7 ℃ for the fresh air treatment unit 4 through a first freezing water pipe, the classified cold water unit 5 is used for simultaneously providing hot water with the temperature of 50 ℃ and cold water with the temperature of 7 ℃ for air-conditioning in the air-conditioning rooms through the cooling water pipe and the first freezing water pipe respectively, and hot water with the temperature of 50 ℃ and cold water with the temperature of 12 ℃ for the air-conditioning in the air-conditioning rooms through the cooling water pipe and the second freezing water pipe respectively; namely, the grading cold water unit 5 can provide hot water and cold water with two different temperatures, can meet the working condition requirements of different areas of the underground command center and the running requirements of air conditioners in different air conditioning rooms, and is convenient for the regional adjustment of the underground command center; fresh air enters an air-conditioning room and returns to the underground command center, is discharged into the exhaust diffusion chamber 21 through the exhaust pipe and the exhaust fan 22, and is discharged into the outdoor environment through the exhaust diffusion chamber 21.
Further, referring to fig. 1 and 4, the exhaust unit 2 includes an exhaust fan 22 and an exhaust diffusion chamber 21, the exhaust fan includes a first exhaust pipe and a second exhaust pipe, the exhaust fan 22 is communicated with the underground command center through the first exhaust pipe, and the exhaust fan 22 is communicated with the exhaust diffusion chamber 21 through the second exhaust pipe; the air of the underground command center is discharged to the exhaust diffusion chamber 21 through the exhaust fan 22 and then discharged to the external environment through the exhaust diffusion chamber 21, so that the underground command center can form an effective air inlet and exhaust circulation, and pollutants in the air can be discharged out of the underground command center.
Further, referring to fig. 1 and 4, the air inlet unit 3 includes an air inlet diffusion chamber 31 and an air inlet machine 32, the air inlet pipe includes a first air inlet pipe and a second air inlet pipe, the air inlet diffusion chamber 31 is connected with the air inlet machine 32 through the first air inlet pipe, and the air inlet machine 32 is connected with the fresh air processing unit 4 through the second air inlet pipe; fresh air in the external environment firstly enters the air inlet diffusion chamber 31, then is sent into the fresh air processing unit 4 through the air inlet fan 32, and fresh air is provided for an air-conditioned room and an underground command center through the fresh air processing unit 4.
Further, referring to fig. 1 and 4, the fresh air processing unit 4 includes a fresh air processing mechanism and a blower 45, the blower includes a first blower pipe and a second blower pipe, the fresh air processing mechanism is connected to the classified cold water unit 5 through a cooling water pipe and a first freezing water pipe, the fresh air processing mechanism is connected to the blower 45 through the first blower pipe, and the blower 45 is communicated to the air-conditioned room through the second blower pipe; the fresh air treatment mechanism treats fresh air according to the environmental requirements of different areas and the environmental requirements of different air-conditioning rooms, and the treated fresh air is sent into the air-conditioning rooms through the blower 45.
Further, referring to fig. 1, 4 and 5, the cooling water pipe includes a first water pipe 61, a second water pipe 62, a third water pipe 63 and a fourth water pipe 64, the first freezing water pipe includes a fifth water pipe 65, a sixth water pipe 66 and a seventh water pipe 67, and the second freezing water pipe includes an eighth water pipe 68 and a ninth water pipe 69; the first water pipe 61, the second water pipe 62, the third water pipe 63, the fourth water pipe 64, the fifth water pipe 65, the sixth water pipe 66, the seventh water pipe 67, the eighth water pipe 68 and the ninth water pipe 69 respectively comprise a water inlet pipe and a water outlet pipe, and the water inlet pipes and the water outlet pipes of the second water pipe 62, the third water pipe 63, the fourth water pipe 64, the sixth water pipe 66, the seventh water pipe 67 and the ninth water pipe 69 are respectively provided with an adjusting water valve, and the adjusting water valve is electrically connected with a controller.
Further, referring to fig. 1 and 3, the staged cooling water unit 5 includes a cooling water tank 51, a freezing water tank 52 and a staged cooling water mechanism 53, the staged cooling water mechanism 53 is connected to the cooling water tank 51 through the first water pipe 61, the cooling water tank 51 is connected to the high temperature cooling tower 1 through the second water pipe 62, the cooling water tank 51 is connected to the fresh air handling mechanism through the third water pipe 63, and the cooling water tank 51 is connected to an air conditioner in an air-conditioned room through the fourth water pipe 64; the classifying cooling water mechanism 53 is connected with the chilled water tank 52 through the fifth water pipe 65 and the eighth water pipe 68 respectively, the chilled water tank 52 is connected with the fresh air treatment mechanism through the sixth water pipe 66, and the chilled water tank 52 is connected with an air conditioner in an air-conditioned room through the seventh water pipe 67 and the ninth water pipe 69 respectively.
Further, referring to fig. 2, the fresh air handling unit includes a first compressor 41, a heating coil 42, a filter 43 and a surface cooling coil 44 connected in turn by a head-to-tail pipeline, the heating coil 42 is connected to a cooling water tank 51 through a third water pipe 63, and the surface cooling coil 44 is connected to a freezing water tank 52 through a sixth water pipe 66.
The cooling water tank 51 is used for delivering 50 ℃ hot water to the cooling tower 1 through the second water pipe 62, the cooling water tank 51 is used for providing 50 ℃ hot water to an air conditioner in an air-conditioning room through the third water pipe 63, and the cooling water tank 51 is used for providing 50 ℃ hot water to the heating coil 42 in the fresh air treatment mechanism through the fourth water pipe 64; the chilled water tank 52 provides 7 ℃ chilled water to the surface cooling coil 44 in the fresh air handling unit via a sixth water line 66; for an air-conditioning room in which personnel work in an underground command center, cooling and dehumidifying are required, and the chilled water tank 52 supplies 7 ℃ cold water to the air-conditioning room through a seventh water pipe 67; for an air-conditioned room for storing equipment and an air-conditioned room for communication, only cooling is required, and the chilled water tank 52 supplies cold water of 12 c to the air-conditioned room through the ninth water pipe 69.
Further, referring to fig. 3, the staged cooling water mechanism 53 includes an evaporator 531, a first condenser 532, a second condenser 533, a second compressor 534, a third compressor 535, a first expansion valve 536 and a second expansion valve 537, wherein the second compressor 534, the first condenser 532, the first expansion valve 536 and the evaporator 531 are sequentially connected end to end through a pipeline, and the third compressor 535, the second condenser 533, the second expansion valve 537 and the evaporator 531 are sequentially connected end to end through a pipeline; the first condenser 532 and the second condenser 533 are connected to the cooling water tank 51 through a first water pipe 61, and the evaporator 531 is connected to the freezing water tank 52 through a fifth water pipe 65 and an eighth water pipe 68, respectively.
In this embodiment, the evaporator 531 is a four-tube evaporator 531, which can provide chilled water with a water supply temperature of 7 ℃ and a return water temperature of 12 ℃ and chilled water with a water supply temperature of 12 ℃ and a return water temperature of 17 ℃, so as to facilitate the partition adjustment of the underground command center; the water supply temperature of the first condenser 532 and the second condenser 533 is 50 ℃, the backwater temperature is 35 ℃, the temperature difference of 15 ℃ is adopted to convey high-temperature cooling water, the conveying pipe diameter is reduced, the installation is facilitated, and the conveying energy consumption is 20% less than that of the conventional temperature difference conveying of 5 ℃; in addition, under the condition of unchanged energy efficiency, the volume of the condenser is greatly reduced, the occupied space of the hierarchical water chilling unit is reduced, and the installation of the underground space is facilitated.
Referring to fig. 6, the present invention further provides a control method for the air conditioning system, which specifically includes the following steps:
s100, presetting a preset value of indoor temperature in an air-conditioning room in a controller;
S200, a first temperature sensor arranged in the air inlet diffusion chamber 31 detects an outdoor temperature value, a first humidity sensor arranged in the air inlet diffusion chamber 31 detects an outdoor humidity value, and the first temperature sensor and the first humidity sensor feed back detection results to a controller;
S300, detecting an indoor temperature value by a second temperature sensor arranged in the air-conditioning room, detecting an indoor humidity value by a second humidity sensor arranged in the air-conditioning room, and feeding back detection results to the controller by the second temperature sensor and the second humidity sensor;
s400, the controller calculates an outdoor enthalpy value according to the outdoor temperature value and the outdoor humidity value, and calculates an indoor enthalpy value according to the indoor temperature value and the indoor humidity value;
S500, if the outdoor enthalpy value is larger than the indoor enthalpy value, executing the step S600, otherwise, executing the step S700;
s600, a fresh air processing mechanism starts a dehumidification cooling mode, a filter 43 filters fresh air, a surface cooling coil 44 dehumidifies and cools the fresh air, and a heating coil 42 does not work; at this time, the classifying cold water unit 5 provides 7 ℃ chilled water for the surface cooling coil 44, and fresh air is filtered by the filter 43 and cooled and dehumidified by the surface cooling coil 44 and then is sent into an air conditioning room;
s700, a fresh air treatment mechanism starts a ventilation mode, a filter 43 filters fresh air, and a surface cooling coil 44 and a heating coil 42 do not work; at this time, the fresh air is filtered by the filter 43 in the fresh air handling unit and then directly fed into the conditioned room.
Further, referring to fig. 6, the step S700 further includes the following steps:
S701, when the fresh air is in a ventilation mode, executing a step S702 when the outdoor temperature value detected by the first temperature sensor is less than 5 ℃ below zero;
S702, a fresh air heating mode is started by the fresh air processing mechanism, fresh air is filtered by the filter 43, the fresh air is heated by the heating coil 42, and the surface cooling coil 44 does not work; at this time, the stage cooling water unit 5 supplies hot water of 50c to the heating coil 42, and fresh air is superheated by the filter 43 and heated by the heating coil 42 and then fed into the air-conditioned room.
Further, referring to fig. 6, the step S300 further includes the following steps:
S301, comparing an indoor temperature value detected by a second temperature sensor with a preset value preset by a controller, and if the indoor temperature value is greater than the preset value, executing step S302; if the indoor temperature value is less than the preset value, step S303 is executed, and if the indoor temperature value=the preset value, step S304 is executed;
S302, the controller firstly controls and increases the flow rate of cold water provided by the classified cold water unit 5 for the surface cold coil 44, and then controls and increases the wind speed of the blower 45;
S303, the controller firstly controls the water flow of cold water provided by the less classified cold water units 5 for the surface cold coil 44, and then controls the wind speed of the blower 45 to be reduced;
S304, the controller controls the working states of the stage cooling water unit, the surface cooling coil 44 and the blower 45 to be unchanged.
In this embodiment, the controller adjusts the flow rate of cold water provided by the staged cold water unit 5 to the surface cold coil 44 by adjusting the opening of the adjusting water valve on the sixth water pipe 66.
It will be understood that equivalents and modifications will occur to those skilled in the art based on the present invention and its spirit, and all such modifications and substitutions are intended to be included within the scope of the present invention.

Claims (6)

1. The control method of the air conditioning system for the underground command center comprises an air conditioning room and a controller, and is characterized by further comprising a cooling tower, an exhaust unit, an exhaust pipe, an air inlet unit, an air inlet pipe, a fresh air processing unit, an air supply pipe, a classified cooling water unit, a cooling water pipe, a first freezing water pipe and a second freezing water pipe; the cooling tower is connected with the classified cooling water unit through the cooling water pipe, the fresh air processing unit is connected with the classified cooling water unit through the cooling water pipe and the first freezing water pipe respectively, the classified cooling water unit is connected with an air conditioner in an air conditioning room through the first freezing water pipe and the second freezing water pipe respectively, the air inlet unit is connected with the fresh air processing unit through the air inlet pipe, the fresh air processing unit is communicated with the air conditioning room through the air supply pipe, and the air exhaust unit is communicated with the underground command center through the air exhaust pipe;
The cooling water pipe comprises a first water pipe, a second water pipe, a third water pipe and a fourth water pipe, the first freezing water pipe comprises a fifth water pipe, a sixth water pipe and a seventh water pipe, and the second freezing water pipe comprises an eighth water pipe and a ninth water pipe;
The classified cooling water unit comprises a cooling water tank, a freezing water tank and a classified cooling water mechanism, wherein the classified cooling water mechanism is connected with the cooling water tank through the first water pipe, the cooling water tank is connected with a high-temperature cooling tower through the second water pipe, the cooling water tank is connected with a fresh air treatment mechanism through the third water pipe, and the cooling water tank is connected with an air conditioner in an air-conditioning room through the fourth water pipe; the classifying cold water mechanism is connected with a frozen water pool through the fifth water pipe and the eighth water pipe respectively, the frozen water pool is connected with the fresh air treatment mechanism through the sixth water pipe, and the frozen water pool is connected with an air conditioner in an air-conditioning room through the seventh water pipe and the ninth water pipe respectively;
The classified cooling water mechanism comprises an evaporator, a first condenser, a second compressor, a third compressor, a first expansion valve and a second expansion valve, wherein the second compressor, the first condenser, the first expansion valve and the evaporator are sequentially connected end to end through pipelines, and the third compressor, the second condenser, the second expansion valve and the evaporator are sequentially connected end to end through pipelines; the first condenser and the second condenser are connected with the cooling water tank through a first water pipe, and the evaporator is connected with the cooling water tank through a fifth water pipe and an eighth water pipe respectively;
The control method comprises the following steps:
s100, presetting a preset value of indoor temperature in an air-conditioning room in a controller;
S200, a first temperature sensor arranged in the air inlet diffusion chamber detects an outdoor temperature value, a first humidity sensor arranged in the air inlet diffusion chamber detects an outdoor humidity value, and the first temperature sensor and the first humidity sensor feed back detection results to a controller;
S300, detecting an indoor temperature value by a second temperature sensor arranged in the air-conditioning room, detecting an indoor humidity value by a second humidity sensor arranged in the air-conditioning room, and feeding back detection results to the controller by the second temperature sensor and the second humidity sensor;
s400, the controller calculates an outdoor enthalpy value according to the outdoor temperature value and the outdoor humidity value, and calculates an indoor enthalpy value according to the indoor temperature value and the indoor humidity value;
S500, if the outdoor enthalpy value is larger than the indoor enthalpy value, executing the step S600, otherwise, executing the step S700;
S600, a fresh air processing mechanism starts a dehumidifying and cooling mode, a filter filters fresh air, a surface cooling coil dehumidifies and cools the fresh air, and a heating coil does not work;
And S700, starting a ventilation mode by the fresh air processing mechanism, filtering fresh air by a filter, and enabling the surface cooling coil and the heating coil not to work.
2. The control method for an air conditioning system of an underground command center according to claim 1, wherein the air discharging unit includes an air discharging fan and an air discharging diffusion chamber, the air discharging pipe includes a first air discharging pipe and a second air discharging pipe, the air discharging fan is communicated with the underground command center through the first air discharging pipe, and the air discharging fan is communicated with the air discharging diffusion chamber through the second air discharging pipe.
3. The control method for an air conditioning system of an underground command center according to claim 1, wherein the air inlet unit comprises an air inlet diffusion chamber and an air inlet machine, the air inlet pipe comprises a first air inlet pipe and a second air inlet pipe, the air inlet diffusion chamber is connected with the air inlet machine through the first air inlet pipe, and the air inlet machine is connected with the fresh air processing unit through the second air inlet pipe.
4. The control method for an air conditioning system of an underground command center according to claim 1, wherein the fresh air handling unit includes a fresh air handling mechanism and a blower, the blower includes a first blower pipe and a second blower pipe, the fresh air handling mechanism is connected with the classified cooling water unit through a cooling water pipe and a first freezing water pipe, respectively, the fresh air handling mechanism is connected with the blower through the first blower pipe, and the blower is communicated with the air-conditioned room through the second blower pipe.
5. The method for controlling an air conditioning system for an underground command center according to claim 1, wherein the fresh air handling mechanism comprises a first compressor, a heating coil, a filter and a surface cooling coil which are connected in sequence through a head-to-tail pipeline, the heating coil is connected with a cooling water tank through a third water pipe, and the surface cooling coil is connected with a freezing water tank through a sixth water pipe.
6. The method for controlling an air conditioning system for an underground command center according to claim 1, wherein the step S700 further comprises the steps of:
S701, executing step S702 when the outdoor temperature value detected by the first temperature sensor is less than 5 ℃;
s702, a fresh air heating mode is started by the fresh air processing mechanism, fresh air is filtered by the filter, the fresh air is heated by the heating coil, and the surface cooling coil does not work.
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