CN111964207B - Operation control method for air conditioning unit with integrated processing of cooling, heating and fresh air - Google Patents
Operation control method for air conditioning unit with integrated processing of cooling, heating and fresh air Download PDFInfo
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- CN111964207B CN111964207B CN202010683814.5A CN202010683814A CN111964207B CN 111964207 B CN111964207 B CN 111964207B CN 202010683814 A CN202010683814 A CN 202010683814A CN 111964207 B CN111964207 B CN 111964207B
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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
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
- 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
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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
- 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
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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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
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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
- 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
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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
- 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
- F24F11/85—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 variable-flow pumps
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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
- 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
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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Abstract
The invention discloses an operation control method of an air conditioning unit with integrated processing of cooling, heating and fresh air, wherein the operation modes comprise a cooling and dehumidifying mode, a heating and humidifying mode and the like. The invention can control the multi-mode operation of the air conditioning unit, can adapt to the operation of annual variable working conditions, adopts the means of pre-dehumidification and pre-humidification during the operation, effectively avoids the harm caused by dewing at the tail end of radiation, realizes the purpose of controlling the temperature and the humidity through variable-load operation, has intelligent and simple control method, reduces cold and hot mixing during the variable-load operation of the solution, stores concentrated solution for energy storage, and has the advantages of high energy efficiency and low energy consumption.
Description
Technical Field
The invention relates to a control method, in particular to an operation control method of an air conditioning unit with integrated processing of cooling, heating and fresh air.
Background
Along with the rise of living standard, the requirement of people on thermal comfort in the residential building environment is also continuously improved, and the radiation cooling/heating system has the remarkable advantages of low energy consumption, high thermal comfort, low noise, building space saving and the like as a novel air conditioning terminal, and is widely concerned. Under the refrigeration operating mode, because the lower surface temperature of radiation cooling end, indoor too high relative humidity, radiation end surface can produce the dewfall problem, and the production of dewfall can make the object appear harm such as going mildy, growing hair, corrosion aggravation, the indoor dehumidification means of efficient this moment is the technical key of avoiding radiation end dewfall. Therefore, a dehumidification scheme with high reliability and low energy consumption is an urgent requirement in the household air conditioner.
The solution dehumidification technology can utilize low-grade condensation heat and a small amount of electric energy to drive the dehumidification module, can realize reliable dehumidification effect under the condition of not increasing additional energy consumption, and is an ideal dehumidification scheme for the household air conditioner. When the solution dehumidification module is combined with the heat pump air-phase modulation, remarkable beneficial effects can be generated, and the method mainly comprises the following steps: under the working condition of summer, the indoor dehumidification requirement can be met only by a cold source at the temperature of 16-20 ℃, and compared with the traditional air conditioner, the indoor dehumidification air conditioner can greatly improve the evaporation temperature and improve the energy efficiency; the heat and humidity control is realized, and the indoor thermal comfort is fully ensured; the air is purified, part of inhalable particles carried in the air are washed away, and the antibacterial effect is achieved.
However, the existing solution dehumidification air conditioner is mainly a dehumidifier for industrial and commercial fields, the system operation mode is relatively single, and a targeted energy-saving operation mode and a control scheme for a household air conditioner environment are lacked.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide an operation control method of a cooling-heating and fresh air integrated processing air conditioning unit, which solves the problems of single operation mode and missing of an integral high-efficiency energy-saving operation mode in the prior art aiming at the characteristics that the cooling-heating and fresh air integrated processing unit has large thermal inertia and is complicated to be influenced by indoor and outdoor climate parameter conditions.
The technical scheme is as follows: the operation control method of the air conditioning unit with integrated processing of the cooling, heating and fresh air comprises the following steps:
(1) the air conditioning system is started to operate according to the instruction, and the temperature and humidity sensors acquire real-time indoor and outdoor temperature and humidity parameters at intervals;
(2) judging whether the detected outdoor temperature and humidity reach a preset first interval value for starting a cooling and dehumidifying mode, if so, executing the steps (8) - (13), and if not, executing the step (3);
(3) judging whether the detected outdoor temperature and humidity reach a preset second interval value for starting a cooling and dehumidifying mode, if so, executing the steps (14) - (17), and if not, executing the step (4);
(4) judging whether the detected outdoor temperature and humidity reach a preset third interval value for starting the dehumidification mode, if so, executing the steps (18) - (21), and if not, executing the step (5);
(5) judging whether the detected outdoor temperature and humidity reach a preset fourth interval value for starting a heat supply and humidification mode, if so, executing steps (22) - (27), and if not, executing step (6);
(6) judging whether the detected outdoor temperature and humidity reach a preset fifth interval value for starting a heat supply mode, if so, executing steps (28) - (31), and if not, executing step (7);
(7) stopping the air conditioning system;
(8) the cooling and dehumidifying mode starts to operate, and the refrigerant loop and the solution loop operate;
(9) judging whether the indoor humidity is higher than a preset threshold value, if so, carrying out indoor pre-dehumidification, not starting an indoor tail end to carry out cooling, only conveying the dehumidified air to the indoor through the solution humidifying module, and executing the step (10) until the indoor humidity is lower than the preset threshold value, otherwise, directly executing the step (10);
(10) a cold and hot water loop in the air conditioning system starts variable load operation, and chilled water delivered to the indoor end is regulated according to the difference between the indoor temperature and the preset temperature;
(11) the method comprises the following steps that a solution loop in the air conditioning system starts variable load operation, and the operation mode of the solution loop is adjusted according to the difference between indoor moisture content and preset moisture content;
(12) a refrigerant loop in the air conditioning system starts variable load operation, and the refrigerant flow in the refrigerant loop is adjusted according to the difference between the circulating water temperature in the water distribution tank and a preset temperature value;
(13) judging whether the air conditioning system stops running or not, if the air conditioning system receives a stop signal and needs to stop running, stopping running of the refrigerant loop, the cold and hot water loop and the solution loop, and if not, repeating the step (11);
(14) the cold supply mode starts to operate, and the refrigerant loop and the cold and hot water loop operate;
(15) a cold and hot water loop in the air conditioning system starts variable load operation, and the flow of chilled water delivered to the indoor tail end is adjusted according to the difference between the indoor current temperature and the preset temperature;
(16) a refrigerant loop in the air conditioning system starts variable load operation, and the refrigerant flow in refrigerant backflow is adjusted according to the difference between the circulating water temperature in the water distribution tank and a preset temperature value;
(17) judging whether the air conditioning system stops running or not, if the air conditioning system receives a stop signal and needs to stop running, stopping running of the refrigerant loop and the cold and hot water loop, and if not, repeating the steps (15) - (16);
(18) the dehumidification mode starts to operate, and the cold and hot water loop, the solution loop and the refrigerant loop operate;
(19) the method comprises the following steps that a solution loop in the air conditioning system starts variable load operation, and the operation mode of the solution loop is adjusted according to the difference between indoor moisture content and preset moisture content;
(20) a refrigerant loop in the air conditioning system starts variable load operation, and the refrigerant flow in refrigerant backflow is adjusted according to the difference between the circulating water temperature in a water distribution tank and a preset temperature value;
(21) judging whether the air-conditioning system stops running or not, if the air-conditioning system receives a stop signal and needs to stop running, stopping running of the solution loop and the refrigerant loop, and if not, executing the repeated steps (19) - (20);
(22) the heating and humidifying mode starts to operate, and the refrigerant loop and the solution loop operate;
(23) judging whether the indoor temperature is lower than a preset threshold value, if so, pre-supplying heat, not conveying hot water to the humidity adjusting module, only starting the indoor tail end to supply heat, and executing the step (24) if not after the indoor temperature is higher than the preset threshold value, and directly executing the step (24);
(24) a cold and hot water loop in the air conditioning system starts variable load operation, and the flow of chilled water delivered to the indoor tail end is adjusted according to the difference between the indoor current temperature and the preset temperature;
(25) the method comprises the following steps that a solution loop in the air conditioning system starts variable load operation, and the operation mode of the solution loop is adjusted according to the difference between indoor moisture content and preset moisture content;
(26) a refrigerant loop in the air conditioning system starts variable load operation, and the refrigerant flow in refrigerant backflow is adjusted according to the difference between the circulating water temperature in the water distribution tank and a preset temperature value;
(27) judging whether the air conditioning system stops running or not, if the air conditioning system receives a stop signal and needs to stop running, stopping running of the refrigerant loop, the cold and hot water loop and the solution loop, and if not, repeating the steps (24) - (26);
(28) the heating mode starts to operate, and the refrigerant loop and the cold and hot water loop operate;
(29) a cold and hot water loop in the air conditioning system starts variable load operation, and the flow of chilled water delivered to the indoor tail end is adjusted according to the difference between the indoor current temperature and the preset temperature;
(30) a refrigerant loop in the air conditioning system starts variable load operation, and the refrigerant flow in refrigerant backflow is adjusted according to the difference between the circulating water temperature in the water distribution tank and a preset temperature value;
(31) and (4) judging whether the air conditioning system stops running or not, if the air conditioning system receives a stop signal and needs to stop running, stopping running of the refrigerant loop and the cold and hot water loop, and if not, repeating the steps (29) - (30).
Wherein, the first interval value of the step (2) is: the temperature is more than or equal to 30 ℃, and the moisture content is more than or equal to 12 g/kg; the second interval value of the step (3) is as follows: the temperature is more than or equal to 30 ℃, and the moisture content is less than 12 g/kg; the third interval value of the step (4) is as follows: the temperature is 20-30 ℃, and the moisture content is more than or equal to 12 g/kg; the fourth interval value of the step (5) is as follows: the temperature is less than or equal to 20 ℃, and the moisture content is less than or equal to 10 g/kg; the fifth interval value of the step (6) is as follows: the temperature is less than or equal to 20 ℃, and the moisture content is more than 10 g/kg.
(10) A cold and hot water loop in the air conditioning system starts variable load operation, and when the indoor temperature is not within the range of +/-1.5 ℃ of the preset temperature, chilled water conveyed to the indoor tail end is regulated;
(11) the method comprises the following steps that a solution loop in the air conditioning system starts variable-load operation, and when the indoor moisture content is not within the range of +/-2 g/kg of preset moisture content, the operation mode of the solution loop is adjusted;
(12) a refrigerant loop in the air conditioning system starts variable load operation, and when the temperature of circulating water in a water distribution box is not equal to a preset temperature, a compressor automatically adjusts the flow of the refrigerant in the refrigerant loop through frequency conversion;
(13) judging whether the air conditioning system stops running or not, if the air conditioning system receives a stop signal and needs to stop running, stopping running of the refrigerant loop, the cold and hot water loop and the solution loop, and if not, repeating the step (11);
(14) the cold supply mode starts to operate, and the refrigerant loop and the cold and hot water loop operate;
(15) a cold and hot water loop in the air conditioning system starts to run in a variable load mode, and when the indoor temperature is not within the range of +/-1.5 ℃ of the preset temperature, the flow of chilled water conveyed to the indoor tail end is adjusted;
(16) a refrigerant loop in the air conditioning system starts variable load operation, and when the temperature of circulating water in a water distribution box is not equal to a preset temperature, a compressor automatically adjusts the flow of the refrigerant in the refrigerant loop through frequency conversion;
(17) judging whether the air conditioning system stops running or not, if the air conditioning system receives a stop signal and needs to stop running, stopping running of the refrigerant loop and the cold and hot water loop, and if not, repeating the steps (15) - (16);
(18) the dehumidification mode starts to operate, and the cold and hot water loop, the solution loop and the refrigerant loop operate;
(19) the method comprises the following steps that a solution loop in the air conditioning system starts variable-load operation, and when the indoor moisture content is not within the range of +/-2 g/kg of preset moisture content, the operation mode of the solution loop is adjusted;
(20) a refrigerant loop in the air conditioning system starts variable load operation, and when the temperature of circulating water in a water distribution box is not equal to a preset temperature, a compressor automatically adjusts the flow of the refrigerant in the refrigerant loop through frequency conversion;
(21) judging whether the air-conditioning system stops running or not, if the air-conditioning system receives a stop signal and needs to stop running, stopping running of the solution loop and the refrigerant loop, and if not, executing the repeated steps (19) - (20);
(22) the heating and humidifying mode starts to operate, and the refrigerant loop and the solution loop operate;
(23) judging whether the indoor temperature is lower than a preset threshold value, if so, pre-supplying heat, not conveying hot water to the humidity adjusting module, only starting the indoor tail end to supply heat, and executing the step (24) if not after the indoor temperature is higher than the preset threshold value, and directly executing the step (24);
(24) a cold and hot water loop in the air conditioning system starts to run in a variable load mode, and when the indoor temperature is not within the range of +/-1.5 ℃ of the preset temperature, the flow of hot water conveyed to the indoor tail end is adjusted according to the difference between the indoor current temperature and the preset temperature; (25) the method comprises the following steps that a solution loop in the air conditioning system starts variable-load operation, and when the indoor moisture content is not within the range of +/-2 g/kg of preset moisture content, the operation mode of the solution loop is adjusted;
(26) a refrigerant loop in the air conditioning system starts variable load operation, and when the temperature of circulating water in a water distribution box is not equal to a preset temperature, a compressor automatically adjusts the flow of the refrigerant in the refrigerant loop through frequency conversion;
(27) judging whether the air conditioning system stops running or not, if the air conditioning system receives a stop signal and needs to stop running, stopping running of the refrigerant loop, the cold and hot water loop and the solution loop, and if not, repeating the steps (24) - (26);
(28) the heating mode starts to operate, and the refrigerant loop and the cold and hot water loop operate;
(29) a cold and hot water loop in the air conditioning system starts to run in a variable load mode, and when the indoor temperature is not within the range of +/-1.5 ℃ of the preset temperature, the flow of hot water conveyed to the indoor tail end is adjusted;
(30) a refrigerant loop in the air conditioning system starts variable load operation, and when the temperature of circulating water in a water distribution box is not equal to a preset temperature, a compressor automatically adjusts the flow of the refrigerant in the refrigerant loop through frequency conversion;
(31) and (4) judging whether the air conditioning system stops running or not, if the air conditioning system receives a stop signal and needs to stop running, stopping running of the refrigerant loop and the cold and hot water loop, and if not, repeating the steps (29) - (30).
In order to cover the annual operation condition of the air conditioning unit, the unit function is integrated, the utilization rate is high, and the first interval value of the step (2) is as follows: the temperature is more than or equal to 30 ℃, and the moisture content is more than or equal to 12 g/kg; the second interval value of the step (3) is as follows: the temperature is more than or equal to 30 ℃, and the moisture content is less than 12 g/kg; the third interval value of the step (4) is as follows: the temperature is 20-30 ℃, and the moisture content is more than or equal to 12 g/kg; the fourth interval value of the step (5) is as follows: the temperature is less than or equal to 20 ℃, and the moisture content is less than or equal to 10 g/kg; the fifth interval value of the step (6) is as follows: the temperature is less than or equal to 20 ℃, and the moisture content is more than 10 g/kg.
Realize accurate accuse temperature through refrigerated water variable flow operation, utilize cold load variable load operation simultaneously, avoid lasting the extravagant unit energy consumption of full load operation, if indoor current temperature surpasss more than preset temperature 1.5 ℃ in step (10) and (15), then the valve is opened entirely, carries the refrigerated water of full flow to indoor end, if indoor current temperature is in presetting temperature 1.5 ℃ of scope, then the valve aperture reduces to half, carries the refrigerated water of half flow to indoor end, if indoor current temperature is less than more than preset temperature 1.5 ℃, then pauses to indoor end transport refrigerated water.
Accurate humidity control is achieved through the operation mode of the solution loop, meanwhile, the humidity load variable load operation is utilized, waste of unit energy consumption caused by continuous full load operation is avoided, in the steps (11) and (19), if the indoor current moisture content exceeds the preset moisture content by more than 2g/kg, the solution loop conducts continuous solution exchange, if the indoor current moisture content is within the range of +/-2 g/kg of the preset moisture content, the dehumidifier and the regenerator respectively conduct self-circulation, the solution pause continuous exchange is carried out, and if the indoor current moisture content is lower than the preset moisture content by more than 2g/kg, the solution loop stops operating.
The variable load operation of the refrigerant loop is realized through the frequency conversion of the compressor, the temperature of circulating water in the water distribution box can be accurately controlled to be maintained at a preset value, and the balance between the supplied cold quantity and the consumed cold quantity is realized, in the steps (12), (16) and (20), if the current temperature of the circulating water is greater than the preset value, the flow of the refrigerant in the refrigerant loop is increased, if the current temperature of the circulating water is equal to the preset value, the flow of the refrigerant in the refrigerant loop is reduced, and if the current temperature of the circulating water is lower than the preset value, the operation of the refrigerant loop is suspended.
Realize accurate accuse temperature through hot water variable flow operation, utilize the heat load variable load operation simultaneously, avoid lasting the extravagant unit energy consumption of full load operation, if indoor current temperature is less than more than preset temperature 1.5 ℃ in step (24) and (29), then the valve is opened entirely, to the hot water of indoor end transport total flow, if indoor current temperature at preset temperature 1.5 ℃ within range, then the valve aperture reduces to half, to the hot water of indoor end transport half flow, if indoor current temperature is higher than preset temperature more than 1.5 ℃, then pause to the indoor end transport refrigerated water.
And (2) realizing accurate humidity control through the operation form of the solution loop, simultaneously utilizing the variable load operation of the humidity load to avoid the waste of unit energy consumption caused by continuous full load operation, wherein in the step (25), if the indoor current moisture content is lower than the preset moisture content by more than 2g/kg, the solution loop carries out continuous solution exchange, if the indoor current moisture content is within the range of +/-2 g/kg of the preset moisture content, the dehumidifier and the regenerator respectively carry out self-circulation, the solution is suspended for continuous exchange, and if the indoor current moisture content is higher than the preset moisture content by more than 2g/kg, the solution loop stops operating.
The variable load operation of the refrigerant loop is realized through the frequency conversion of the compressor, the temperature of circulating water in the water distribution box can be accurately controlled to be maintained at a preset value, the balance between heat supply and heat consumption is realized, in the steps (26) and (30), if the current temperature of the circulating water is lower than the preset value, the flow of the refrigerant in the refrigerant loop is increased, if the current temperature of the circulating water is equal to the preset value, the flow of the refrigerant in the refrigerant loop is reduced, and if the current temperature of the circulating water is higher than the preset value, the operation of the refrigerant loop is suspended.
Has the advantages that: the invention can control the multi-mode operation of the air conditioning unit, can adapt to the operation of year-round variable working conditions, adopts pre-dehumidification and pre-humidification means in the operation, effectively avoids the harm caused by condensation at the tail end of radiation, realizes the purpose of temperature and humidity control through variable-load operation, has intelligent and simple control method, reduces cold and heat mixing in the variable-load operation of the solution, stores the concentrated solution for energy storage, has the advantages of high energy efficiency and low energy consumption, utilizes the solution dehumidification regenerator in the humidity control module, can wash off part of inhalable particles carried in the air by the solution, and simultaneously performs sterilization on the air to a certain degree, thereby playing the effect of purifying the air.
Drawings
FIG. 1 is a schematic view of the mode of operation of the present invention;
FIG. 2 is a schematic flow chart of the present invention;
FIG. 3 is a schematic diagram of the system in a cooling and dehumidifying mode;
FIG. 4 is a schematic diagram of the system in a cooling mode;
FIG. 5 is a schematic diagram of the system in dehumidification mode;
FIG. 6 is a schematic diagram of the system in a heating and humidifying mode;
FIG. 7 is a schematic diagram of the system in heating mode;
FIG. 8 is a flowchart illustrating a control method in a cooling and dehumidifying mode;
FIG. 9 is a flowchart illustrating a control method in a cooling mode;
FIG. 10 is a flow chart illustrating a control method in the dehumidification mode;
FIG. 11 is a flow chart of a control method in a heating mode;
fig. 12 is a flow chart of a control method in a heating and humidifying mode.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 7, the air conditioning unit with integrated cooling, heating and fresh air treatment comprises three circulation loops of a refrigerant loop, a solution loop and a cold and hot water loop, and can realize five operation modes: cooling and dehumidifying, cooling, dehumidifying, heating and humidifying, and heating. As shown in fig. 3, cooling and dehumidifying are performed in the room by supplying the chilled water and the dehumidified air to the room. As shown in fig. 4, cooling of the room is achieved by delivering chilled water to the indoor radiant tip 12. As shown in fig. 5, dehumidification of the room is achieved by feeding dehumidified air into the room. As shown in fig. 6, the heating and humidifying of the room is realized by supplying hot water and humidified air into the room. As shown in fig. 7, heating is achieved by delivering hot water to the indoor radiant end 12. In the refrigerant circuit in the cooling and dehumidifying mode, the superheated vapor of the refrigerant at the outlet of the compressor 4 passes through the four-way valve 5, the refrigerant-solution heat exchanger 6, the outdoor condenser 7, the expansion valve 8 and the indoor evaporator 9 in sequence, and the refrigerant at the outlet of the indoor evaporator 9 finally returns to the compressor 4 through the pipeline. In the refrigerant circuit in the heating and humidifying mode and the heating mode, the refrigerant reversely flows through the switching of the four-way valve. When the air conditioner is in a cooling, dehumidifying and dehumidifying mode, and the solution loop is in stable operation, part of the solution at the outlet of the indoor side dehumidifier 2 sequentially flows through the first solution pump 19 and the inlet of the indoor side dehumidifier 2, absorbs moisture in the dehumidified air in the indoor side dehumidifier 2, and then returns to the outlet of the indoor side dehumidifier 2 to complete self-circulation of the solution at the dehumidifying side; a part of the solution at the outlet of the outdoor regenerator 10 sequentially flows through the second solution pump 23 and the inlet of the outdoor regenerator 10, releases moisture to the outdoor air in the outdoor regenerator 10, and then returns to the outlet of the outdoor regenerator 10 to complete the self-circulation of the solution at the regeneration side; meanwhile, the other part of the solution at the outlet of the outdoor regenerator 10 and the other part of the solution at the outlet of the indoor dehumidifier 2 flow through the solution heat exchanger 25 and then flow into the bottom of the indoor dehumidifier 2 and the bottom of the outdoor regenerator 10 respectively to complete solution exchange; when the air conditioner is in the heating and humidifying mode, the stable operation of the solution circuit is substantially the same as that described above, except that the regenerator 2 is on the indoor side and the dehumidifier 10 is on the outdoor side. In chilled water circulation in a cooling dehumidification mode, after part of chilled water at an outlet of a water distribution tank 13 sequentially flows through a circulating water pump 16 and a first cold and hot water flow regulating valve 17, the chilled water enters an indoor radiation tail end 12 to absorb indoor environment heat to realize cooling and then is sent into a water distribution tank inlet 14, the other part of chilled water flows through a second cold and hot water flow regulating valve 18, and the chilled water enters a cold and hot water-solution heat exchanger 11 to release cooling capacity; in the chilled water circulation in the cooling mode, chilled water at the outlet 15 of the water distribution tank passes through the circulating water pump 16 and then flows through the first cold and hot water flow regulating valve 17, the indoor environment heat is absorbed in the radiation tail end 12 to realize cooling, and then the chilled water is sent into the inlet 14 of the water distribution tank, at the moment, the second cold and hot water flow regulating valve 18 is closed, and the chilled water does not pass through the cold and hot water-solution heat exchanger 11; in the chilled water circulation in the dehumidification mode, after chilled water at the outlet 15 of the water distribution tank passes through the circulating water pump 16, when the first cold and hot water flow regulating valve 17 is closed and the second cold and hot water flow regulating valve 18 is opened, the chilled water is sent into the cold and hot water-solution heat exchanger 11 to absorb heat of a dehumidification solution and then is sent into the inlet 14 of the water distribution tank; hot water circulation in a heating and humidifying mode is carried out, a circulating water pump 16 is started, a first cold and hot water flow regulating valve 17 and a second cold and hot water flow regulating valve 18 are opened, one part of hot water at an outlet 15 of a water distribution box flows through a cold and hot water-solution heat exchanger 11 to cool a solution, and the other part of hot water enters a radiation tail end 12 to supply heat; in the hot water circulation in the heating mode, the circulating water pump 16 is started, the second cold and hot water flow regulating valve 18 is opened, the first cold and hot water flow regulating valve 17 is closed, and hot water enters the radiation tail end 12 to release heat and then flows back to the water distribution tank 13.
As shown in fig. 2 and 8-12, the operation control method of the air conditioning unit with integrated processing of cooling, heating and fresh air includes the following steps:
(1) the air conditioning system is started to operate according to the instruction, and the temperature and humidity sensors acquire real-time indoor and outdoor temperature and humidity parameters at intervals;
(2) judging whether the detected outdoor temperature and humidity reach a preset first interval value for starting a cooling and dehumidifying mode, wherein the first interval value is as follows: the temperature is more than or equal to 30 ℃, the moisture content is more than or equal to 12g/kg, if yes, the steps (8) to (13) are executed, and if not, the step (3) is executed;
(3) judging whether the detected outdoor temperature and humidity reach a preset second interval value for starting a cooling and dehumidifying mode, wherein the second interval value is as follows: the temperature is more than or equal to 30 ℃, the moisture content is less than 12g/kg, if yes, the steps (14) - (17) are executed, and if not, the step (4) is executed;
(4) judging whether the detected outdoor temperature and humidity reach a preset third interval value for starting the dehumidification mode, wherein the third interval value is as follows: the temperature is 20-30 ℃, the moisture content is more than or equal to 12g/kg, if yes, the steps (18) - (21) are executed, and if not, the step (5) is executed;
(5) judging whether the detected outdoor temperature and humidity reach a preset fourth interval value for starting the heating and humidifying mode, wherein the fourth interval value is as follows: the temperature is less than or equal to 20 ℃, the moisture content is less than or equal to 10g/kg, if yes, the steps (22) to (27) are executed, and if not, the step (6) is executed;
(6) judging whether the detected outdoor temperature and humidity reach a preset fifth interval value of the starting heat supply mode, wherein the fifth interval value is as follows: the temperature is less than or equal to 20 ℃, the moisture content is more than 10g/kg, if yes, the steps (28) - (31) are executed, and if not, the step (7) is executed;
(7) stopping the air conditioning system;
(8) the cooling and dehumidifying mode starts to operate, and the refrigerant loop and the solution loop operate;
(9) judging whether the indoor humidity is higher than a preset threshold value, if so, carrying out indoor pre-dehumidification, not starting an indoor tail end to carry out cooling, only conveying the dehumidified air to the indoor through the solution humidifying module, and executing the step (10) until the indoor humidity is lower than the preset threshold value, otherwise, directly executing the step (10);
(10) the cold and hot water loop in the air conditioning system starts variable load operation, chilled water conveyed to the indoor tail end is regulated according to the difference between the indoor temperature and the preset temperature, if the indoor current temperature is higher than the preset temperature by more than 1.5 ℃, the rotating speed of the circulating water pump 16 is increased, the flow of the chilled water conveyed to the indoor radiation tail end 12 is increased, the heat exchange between the radiation tail end 12 and indoor air is strengthened, and the indoor temperature is reduced; if the indoor current temperature is within the range of +/-1.5 ℃ of the preset temperature, reducing the rotating speed of the circulating water pump 16, reducing the flow of chilled water conveyed to the indoor radiation tail end 12, reducing the heat exchange between the radiation tail end 12 and indoor air, and enabling the indoor air temperature to fluctuate within the set range; if the current indoor temperature is lower than the preset temperature by more than 1.5 ℃, the circulating water pump 16 is suspended to operate, the delivery of the chilled water to the indoor radiation tail end 12 is stopped, the radiation tail end 12 does not exchange heat with the indoor air, and the temperature of the indoor air is gradually increased;
(11) the solution loop in the air conditioning system starts variable load operation, the operation mode of the solution loop is adjusted according to the difference between the indoor moisture content and the preset moisture content, if the indoor current moisture content exceeds the preset moisture content by more than 2g/kg, the concentrated solution at the bottom of the outdoor side regenerator 10 is continuously sent to the bottom of the indoor side dehumidifier 2, the solution loop carries out continuous solution exchange, the latent heat of the air is continuously removed by the concentrated solution in the indoor side dehumidifier 2, the air moisture content is continuously reduced, and the indoor moisture content is reduced after the air is sent indoors to realize dehumidification; if the current indoor moisture content is within the range of +/-2 g/kg of the preset moisture content, the second solution valve 21 and the fourth solution valve 24 are closed, the solution does not undergo the exchange process, the indoor side dehumidifier 2 and the outdoor side regenerator 10 respectively perform self-circulation, along with the self-circulation process, the solution concentration in the indoor side dehumidifier 2 is continuously reduced, the dehumidification capacity is weakened, the air moisture content is slightly reduced and then sent into the room, and the indoor moisture content is fluctuated within the set range; if the current indoor moisture content is lower than the preset moisture content by more than 2g/kg, stopping the operation of the first solution pump 19 and the second solution pump 22, and stopping the operation of the solution loop;
(12) a refrigerant loop in the air conditioning system starts variable load operation, the refrigerant flow in the refrigerant loop is adjusted according to the difference between the temperature of circulating water in a water distribution tank and a preset temperature value, if the current temperature of the circulating water is higher than the preset value, the rotating speed of a compressor 4 is increased, the refrigerant flow in the refrigerant loop is increased, the heat exchange between chilled water and the refrigerant is enhanced, and the temperature of the chilled water is reduced; if the current circulating water temperature is equal to the preset value, reducing the rotating speed of the compressor 4 and reducing the flow of the refrigerant in the refrigerant loop; if the current circulating water temperature is lower than the preset value, the compressor 4 stops running, the refrigerant loop stops running, and the circulating water temperature gradually rises;
(13) judging whether the air conditioning system stops running or not, if the air conditioning system receives a stop signal and needs to stop running, stopping running of the refrigerant loop, the cold and hot water loop and the solution loop, and if not, repeating the step (11);
(14) the cold supply mode starts to operate, and the refrigerant loop and the cold and hot water loop operate;
(15) a cold and hot water loop in the air conditioning system starts variable load operation, the flow of chilled water conveyed to the indoor tail end is regulated according to the difference between the indoor current temperature and the preset temperature, if the indoor current temperature exceeds the preset temperature by more than 1.5 ℃, the rotating speed of a circulating water pump 16 is increased, the flow of the chilled water conveyed to the indoor radiation tail end 12 is increased, the heat exchange between the radiation tail end 12 and indoor air is strengthened, and the indoor temperature is reduced; if the indoor current temperature is within the range of +/-1.5 ℃ of the preset temperature, reducing the rotating speed of the circulating water pump 16, reducing the flow of chilled water conveyed to the indoor radiation tail end 12, reducing the heat exchange between the radiation tail end 12 and indoor air, and enabling the indoor air temperature to fluctuate within the set range; if the current indoor temperature is lower than the preset temperature by more than 1.5 ℃, the circulating water pump 16 is suspended to operate, the delivery of the chilled water to the indoor radiation tail end 12 is stopped, the radiation tail end 12 does not exchange heat with the indoor air, and the indoor air temperature is gradually increased;
(16) a refrigerant loop in the air conditioning system starts variable load operation, the refrigerant flow in refrigerant backflow is adjusted according to the difference between the temperature of circulating water in a water distribution tank and a preset temperature value, if the current temperature of the circulating water is higher than the preset value, the rotating speed of a compressor 4 is increased, the refrigerant flow in the refrigerant loop is increased, the heat exchange between chilled water and the refrigerant is enhanced, and the temperature of the chilled water is reduced; if the current circulating water temperature is close to the preset value, the rotating speed of the compressor 4 is reduced, the flow of the refrigerant in the refrigerant loop is reduced, and the circulating water temperature is fluctuated within a set range; if the current circulating water temperature is significantly lower than the preset value, the compressor 4 stops running, the refrigerant loop stops running, and the circulating water temperature gradually rises;
(17) judging whether the air conditioning system stops running or not, if the air conditioning system receives a stop signal and needs to stop running, stopping running of the refrigerant loop and the cold and hot water loop, and if not, repeating the steps (15) - (16);
(18) the dehumidification mode starts to operate, and the cold and hot water loop, the solution loop and the refrigerant loop operate;
(19) the solution loop in the air conditioning system starts variable load operation, the operation mode of the solution loop is adjusted according to the difference between the indoor moisture content and the preset moisture content, if the indoor current moisture content exceeds the preset moisture content by more than 2g/kg, the concentrated solution at the bottom of the outdoor side regenerator 10 is continuously sent to the bottom of the indoor side dehumidifier 2, the solution loop carries out continuous solution exchange, the latent heat of the air is continuously removed by the concentrated solution in the indoor side dehumidifier 2, the air moisture content is continuously reduced, and the indoor moisture content is reduced after the air is sent indoors to realize dehumidification; if the current indoor moisture content is within the range of +/-2 g/kg of the preset moisture content, the second solution valve 21 and the fourth solution valve 24 are closed, the solution does not undergo the exchange process, the indoor side dehumidifier 2 and the outdoor side regenerator 10 respectively perform self-circulation, along with the self-circulation process, the solution concentration in the indoor side dehumidifier 2 is continuously reduced, the dehumidification capacity is weakened, the air moisture content is slightly reduced and then sent into the room, and the indoor moisture content is fluctuated within the set range; if the current indoor moisture content is lower than the preset moisture content by more than 2g/kg, stopping the operation of the first solution pump 19 and the second solution pump 22, and stopping the operation of the solution loop;
(20) a refrigerant loop in the air-conditioning system starts variable load operation, the refrigerant flow in refrigerant backflow is adjusted according to the difference between the temperature of circulating water in a water distribution tank and a preset temperature value, if the current circulating water temperature is higher than the preset value, the rotating speed of a compressor 4 is increased, the refrigerant flow in the refrigerant loop is increased, the heat exchange between chilled water and the refrigerant is enhanced, and the temperature of the chilled water is reduced; if the current circulating water temperature is equal to the preset value, reducing the rotating speed of the compressor 4 and reducing the flow of the refrigerant in the refrigerant loop; if the current circulating water temperature is lower than the preset value, the compressor 4 stops running, the refrigerant loop stops running, and the circulating water temperature gradually rises;
(21) judging whether the air-conditioning system stops running or not, if the air-conditioning system receives a stop signal and needs to stop running, stopping running of the solution loop and the refrigerant loop, and if not, executing the repeated steps (19) - (20);
(22) the heating and humidifying mode starts to operate, and the refrigerant loop and the solution loop operate;
(23) judging whether the indoor temperature is lower than a preset threshold value, if so, pre-supplying heat, not conveying hot water to the humidity adjusting module, only starting the indoor tail end to supply heat, and executing the step (24) if not after the indoor temperature is higher than the preset threshold value, and directly executing the step (24);
(24) a cold and hot water loop in the air conditioning system starts variable load operation, the flow of chilled water conveyed to the indoor tail end is regulated according to the difference between the indoor current temperature and the preset temperature, if the indoor current temperature is lower than the preset temperature by more than 1.5 ℃, the rotating speed of a circulating water pump 16 is increased, the flow of hot water conveyed to a radiation tail end 12 is increased, the heat exchange between the radiation tail end 12 and indoor air is strengthened, and the indoor temperature is increased; if the current indoor temperature is within the range of +/-1.5 ℃ of the preset temperature, reducing the rotating speed of the circulating water pump 16, reducing the flow of hot water conveyed to the radiation tail end 12, reducing the heat exchange between the radiation tail end 12 and indoor air, and enabling the indoor air temperature to fluctuate within the set range; if the current indoor temperature is higher than the preset temperature by more than 1.5 ℃, the operation of the circulating water pump 16 is suspended, the hot water is stopped being conveyed to the radiation tail end 12, the radiation tail end 12 does not exchange heat with the indoor air, and the temperature of the indoor air is gradually reduced;
(25) the solution loop in the air conditioning system starts variable load operation, the operation mode of the solution loop is adjusted according to the difference between the indoor moisture content and the preset moisture content, if the indoor current moisture content is lower than the preset moisture content by more than 2g/kg, the dilute solution at the bottom of the outdoor dehumidifier 10 is continuously sent to the bottom of the indoor regenerator 2, the solution loop carries out continuous solution exchange, the air is continuously released latent heat by the dilute solution in the indoor regenerator 2, the air moisture content is continuously increased, and the indoor moisture content is increased after being sent into the room to realize humidification; if the current indoor moisture content is within the range of +/-2 g/kg of the preset moisture content, the second solution valve 21 and the fourth solution valve 24 are closed, the solution does not undergo the exchange process, the indoor side regenerator 2 and the outdoor side dehumidifier 10 respectively perform self-circulation, along with the self-circulation process, the solution concentration in the indoor side regenerator 2 is continuously increased, the humidifying capacity is weakened, the air moisture content is slightly increased and then sent into the room, and the indoor moisture content is fluctuated within the set range; if the current indoor moisture content is higher than the preset moisture content by more than 2g/kg, stopping the operation of the first solution pump 19 and the second solution pump 22, stopping the operation of the solution loop, and gradually reducing the indoor moisture content;
(26) a refrigerant loop in the air conditioning system starts variable load operation, the refrigerant flow in refrigerant backflow is adjusted according to the difference between the temperature of circulating water in a water distribution tank and a preset temperature value, if the current temperature of the circulating water is lower than the preset value, the rotating speed of a compressor 4 is increased, the refrigerant flow in the refrigerant loop is increased, and therefore the hot water temperature is increased; if the current circulating water temperature is equal to the preset value, reducing the rotating speed of the compressor 4 and reducing the flow of the refrigerant in the refrigerant loop; if the current circulating water temperature is higher than the preset value, the compressor 4 stops running, the refrigerant loop stops running, and the circulating water temperature is gradually reduced;
(27) judging whether the air conditioning system stops running or not, if the air conditioning system receives a stop signal and needs to stop running, stopping running of the refrigerant loop, the cold and hot water loop and the solution loop, and if not, repeating the steps (24) - (26);
(28) the heating mode starts to operate, and the refrigerant loop and the cold and hot water loop operate;
(29) a cold and hot water loop in the air conditioning system starts variable load operation, the flow of chilled water delivered to the indoor tail end is regulated according to the difference between the indoor current temperature and the preset temperature, if the indoor current temperature is lower than the preset temperature by more than 1.5 ℃, the rotating speed of a circulating water pump 16 is increased, the flow of hot water delivered to a radiation tail end 12 is increased, the heat exchange between the radiation tail end 12 and indoor air is enhanced, and the indoor temperature is increased; if the current indoor temperature is within the range of +/-1.5 ℃ of the preset temperature, reducing the rotating speed of the circulating water pump 16, reducing the flow of hot water conveyed to the radiation tail end 12, reducing the heat exchange between the radiation tail end 12 and indoor air, and enabling the indoor air temperature to fluctuate within the set range; if the current indoor temperature is higher than the preset temperature by more than 1.5 ℃, the operation of the circulating water pump 16 is suspended, the hot water is stopped being conveyed to the radiation tail end 12, the radiation tail end 12 does not exchange heat with the indoor air, and the temperature of the indoor air is gradually reduced;
(30) a refrigerant loop in the air conditioning system starts variable load operation, the refrigerant flow in refrigerant backflow is adjusted according to the difference between the temperature of circulating water in a water distribution tank and a preset temperature value, if the current temperature of the circulating water is lower than the preset value, the rotating speed of a compressor 4 is increased, the refrigerant flow in the refrigerant loop is increased, and therefore the hot water temperature is increased; if the current circulating water temperature is equal to the preset value, reducing the rotating speed of the compressor 4 and reducing the flow of the refrigerant in the refrigerant loop; if the current circulating water temperature is higher than the preset value, the compressor 4 stops running, the refrigerant loop stops running, and the circulating water temperature is gradually reduced;
(31) and (4) judging whether the air conditioning system stops running or not, if the air conditioning system receives a stop signal and needs to stop running, stopping running of the refrigerant loop and the cold and hot water loop, and if not, repeating the steps (29) - (30).
Claims (5)
1. An operation control method for an air conditioning unit with integrated processing of cooling, heating and fresh air is characterized by comprising the following steps:
(1) the air conditioning system is started to operate according to the instruction, and the temperature and humidity sensors acquire real-time indoor and outdoor temperature and humidity parameters at intervals;
(2) judging whether the detected outdoor temperature and humidity reach a preset first interval value for starting a cooling and dehumidifying mode, if so, executing the steps (8) - (13), and if not, executing the step (3);
(3) judging whether the detected outdoor temperature and humidity reach a preset second interval value for starting a cooling and dehumidifying mode, if so, executing the steps (14) - (17), and if not, executing the step (4);
(4) judging whether the detected outdoor temperature and humidity reach a preset third interval value for starting the dehumidification mode, if so, executing the steps (18) - (21), and if not, executing the step (5);
(5) judging whether the detected outdoor temperature and humidity reach a preset fourth interval value for starting a heat supply and humidification mode, if so, executing steps (22) - (27), and if not, executing step (6);
(6) judging whether the detected outdoor temperature and humidity reach a preset fifth interval value for starting a heat supply mode, if so, executing steps (28) - (31), and if not, executing step (7);
(7) stopping the air conditioning system;
(8) the cooling and dehumidifying mode starts to operate, and the refrigerant loop and the solution loop operate;
(9) judging whether the indoor humidity is higher than a preset threshold value, if so, carrying out indoor pre-dehumidification, not starting an indoor tail end to carry out cooling, only conveying the dehumidified air to the indoor through the solution humidifying module, and executing the step (10) until the indoor humidity is lower than the preset threshold value, otherwise, directly executing the step (10);
(10) a cold and hot water loop in the air conditioning system starts variable load operation, and when the indoor temperature is not within the range of +/-1.5 ℃ of the preset temperature, chilled water conveyed to the indoor tail end is regulated;
(11) the method comprises the following steps that a solution loop in the air conditioning system starts variable-load operation, and when the indoor moisture content is not within the range of +/-2 g/kg of preset moisture content, the operation mode of the solution loop is adjusted;
(12) a refrigerant loop in the air conditioning system starts variable load operation, and when the temperature of circulating water in a water distribution box is not equal to a preset temperature, a compressor automatically adjusts the flow of the refrigerant in the refrigerant loop through frequency conversion;
(13) judging whether the air conditioning system stops running or not, if the air conditioning system receives a stop signal and needs to stop running, stopping running of the refrigerant loop, the cold and hot water loop and the solution loop, and if not, repeating the step (11);
(14) the cold supply mode starts to operate, and the refrigerant loop and the cold and hot water loop operate;
(15) a cold and hot water loop in the air conditioning system starts to run in a variable load mode, and when the indoor temperature is not within the range of +/-1.5 ℃ of the preset temperature, the flow of chilled water conveyed to the indoor tail end is adjusted;
(16) a refrigerant loop in the air conditioning system starts variable load operation, and when the temperature of circulating water in a water distribution box is not equal to a preset temperature, a compressor automatically adjusts the flow of the refrigerant in the refrigerant loop through frequency conversion;
(17) judging whether the air conditioning system stops running or not, if the air conditioning system receives a stop signal and needs to stop running, stopping running of the refrigerant loop and the cold and hot water loop, and if not, repeating the steps (15) - (16);
(18) the dehumidification mode starts to operate, and the cold and hot water loop, the solution loop and the refrigerant loop operate;
(19) the method comprises the following steps that a solution loop in the air conditioning system starts variable-load operation, and when the indoor moisture content is not within the range of +/-2 g/kg of preset moisture content, the operation mode of the solution loop is adjusted;
(20) a refrigerant loop in the air conditioning system starts variable load operation, and when the temperature of circulating water in a water distribution box is not equal to a preset temperature, a compressor automatically adjusts the flow of the refrigerant in the refrigerant loop through frequency conversion;
(21) judging whether the air-conditioning system stops running or not, if the air-conditioning system receives a stop signal and needs to stop running, stopping running of the solution loop and the refrigerant loop, and if not, executing the repeated steps (19) - (20);
(22) the heating and humidifying mode starts to operate, and the refrigerant loop and the solution loop operate;
(23) judging whether the indoor temperature is lower than a preset threshold value, if so, pre-supplying heat, not conveying hot water to the humidity adjusting module, only starting the indoor tail end to supply heat, and executing the step (24) if not after the indoor temperature is higher than the preset threshold value, and directly executing the step (24);
(24) a cold and hot water loop in the air conditioning system starts to run in a variable load mode, and when the indoor temperature is not within the range of +/-1.5 ℃ of the preset temperature, the flow of hot water conveyed to the indoor tail end is adjusted according to the difference between the indoor current temperature and the preset temperature; (25) the method comprises the following steps that a solution loop in the air conditioning system starts variable-load operation, and when the indoor moisture content is not within the range of +/-2 g/kg of preset moisture content, the operation mode of the solution loop is adjusted;
(26) a refrigerant loop in the air conditioning system starts variable load operation, and when the temperature of circulating water in a water distribution box is not equal to a preset temperature, a compressor automatically adjusts the flow of the refrigerant in the refrigerant loop through frequency conversion;
(27) judging whether the air conditioning system stops running or not, if the air conditioning system receives a stop signal and needs to stop running, stopping running of the refrigerant loop, the cold and hot water loop and the solution loop, and if not, repeating the steps (24) - (26);
(28) the heating mode starts to operate, and the refrigerant loop and the cold and hot water loop operate;
(29) a cold and hot water loop in the air conditioning system starts to run in a variable load mode, and when the indoor temperature is not within the range of +/-1.5 ℃ of the preset temperature, the flow of hot water conveyed to the indoor tail end is adjusted;
(30) a refrigerant loop in the air conditioning system starts variable load operation, and when the temperature of circulating water in a water distribution box is not equal to a preset temperature, a compressor automatically adjusts the flow of the refrigerant in the refrigerant loop through frequency conversion;
(31) judging whether the air conditioning system stops running or not, if the air conditioning system receives a stop signal and needs to stop running, stopping running of the refrigerant loop and the cold and hot water loop, and if not, repeating the steps (29) - (30);
wherein, the first interval value of the step (2) is: the temperature is more than or equal to 30 ℃, and the moisture content is more than or equal to 12 g/kg; the second interval value of the step (3) is as follows: the temperature is more than or equal to 30 ℃, and the moisture content is less than 12 g/kg; the third interval value of the step (4) is as follows: the temperature is 20-30 ℃, and the moisture content is more than or equal to 12 g/kg; the fourth interval value of the step (5) is as follows: the temperature is less than or equal to 20 ℃, and the moisture content is less than or equal to 10 g/kg; the fifth interval value of the step (6) is as follows: the temperature is less than or equal to 20 ℃, and the moisture content is more than 10 g/kg;
in the steps (10) and (15), if the indoor current temperature exceeds the preset temperature by more than 1.5 ℃, the valve is fully opened, and the chilled water with the whole flow is conveyed to the indoor tail end, if the indoor current temperature is within the range of +/-1.5 ℃ of the preset temperature, the opening degree of the valve is reduced to half, and the chilled water with the half flow is conveyed to the indoor tail end, and if the indoor current temperature is lower than the preset temperature by more than 1.5 ℃, the chilled water is stopped to be conveyed to the indoor tail end;
in the steps (24) and (29), if the indoor current temperature is lower than the preset temperature by more than 1.5 ℃, the valve is fully opened, and all flows of hot water are conveyed to the indoor tail end, if the indoor current temperature is within the range of +/-1.5 ℃ of the preset temperature, the opening degree of the valve is reduced to half, and half flows of hot water are conveyed to the indoor tail end, and if the indoor current temperature is higher than the preset temperature by more than 1.5 ℃, the conveying of chilled water to the indoor tail end is suspended.
2. The operation control method of the air conditioning unit with integrated processing of cooling, heating and fresh air according to claim 1, wherein in the steps (11) and (19), if the current indoor moisture content exceeds the preset moisture content by more than 2g/kg, the solution loop performs continuous solution exchange, if the current indoor moisture content is within the range of ± 2g/kg, the dehumidifier and the regenerator respectively perform self-circulation, the solution suspends the continuous exchange, and if the current indoor moisture content is lower than the preset moisture content by more than 2g/kg, the solution loop stops operating.
3. The operation control method of an air conditioning unit with integrated processing of cooling, heating and fresh air according to claim 1, wherein in the steps (12), (16) and (20), if the temperature of the current circulating water is higher than a preset value, the flow rate of the refrigerant in the refrigerant circuit is increased, if the temperature of the current circulating water is equal to the preset value, the flow rate of the refrigerant in the refrigerant circuit is decreased, and if the temperature of the current circulating water is lower than the preset value, the operation of the refrigerant circuit is suspended.
4. The operation control method of the air conditioning unit with integrated processing of cooling, heating and fresh air according to claim 1, wherein in the step (25), if the current indoor moisture content is lower than the preset moisture content by more than 2g/kg, the solution loop performs continuous solution exchange, if the current indoor moisture content is within the range of ± 2g/kg, the dehumidifier and the regenerator respectively perform self-circulation, the solution is suspended from continuous exchange, and if the current indoor moisture content is higher than the preset moisture content by more than 2g/kg, the solution loop stops operating.
5. The operation control method of an air conditioning unit with integrated processing of cooling, heating and fresh air according to claim 1, wherein in steps (26) and (30), if the temperature of the current circulating water is lower than a preset value, the flow rate of the refrigerant in the refrigerant circuit is increased, if the temperature of the current circulating water is equal to the preset value, the flow rate of the refrigerant in the refrigerant circuit is decreased, and if the temperature of the current circulating water is higher than the preset value, the operation of the refrigerant circuit is suspended.
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