The air-conditioning unit device and the air-treatment method thereof of the wet segment processing of heat
Technical field
The present invention relates to a kind of air-treatment method of air conditioner load segment processing and realize the device of this method, belong to the technical field of refrigeration, design of air conditioning and manufacturing.
Background technology
Air conditioner load can be divided into sensible heat load and humidity load (latent heat load), and the humidity load processing method in the air handling process mainly contains cool-down dehumidification, solution dehumidification, adsorption and dehumidification etc.Be subjected to the restriction of each side factor, cool-down dehumidification remains the most general air-conditioning humidity load processing method of present use.
Cool-down dehumidification method is that the chilled water of employing lower temperature carries out disposable cool-down dehumidification processing to air, it handled to required saturation state, and then by heating atmosphere temperature rising to ventilation state.In this mode, sensible heat load in the air conditioner load and humidity load all are to adopt cryogenic freezing water to handle, and in order to take into account the demand of dehumidifying, chilled water temperature must enough low (about 7 ℃), cause the evaporating temperature of handpiece Water Chilling Units to improve, the air-conditioning unit eer is lower, and economy is relatively poor, and the unit energy consumption is big.
Summary of the invention
Technical problem: the objective of the invention is for solving the existing problem that the existing evaporating temperature of disposable cool-down dehumidification aircondition is low, the refrigeration unit Energy Efficiency Ratio is difficult to promote, provide a kind of realization air conditioner load segment processing, the air-conditioning unit device and the air-treatment method thereof of the wet segment processing of the heat of efficient energy-saving.
Technical scheme: the air-conditioning unit device of the wet segment processing of the present invention's heat comprises air-treatment part and handpiece Water Chilling Units part.The air-treatment part is linked in sequence and is formed by first surface cooler, second surface cooler, heater, humidifier, blower fan.Handpiece Water Chilling Units partly comprises first handpiece Water Chilling Units and second handpiece Water Chilling Units two parts, two shared condensers of handpiece Water Chilling Units.First handpiece Water Chilling Units is used to prepare the high temperature chilled water, its equipment is followed successively by first compressor, condenser, first fluid reservoir, first filter, first electric expansion valve, first evaporimeter by the order of connection, first evaporimeter links to each other with first compressor again and constitutes the loop, wherein high temperature chilled water part returns first evaporimeter from first evaporimeter through the 3rd magnetic valve, first surface cooler, first magnetic valve, first water pump.Second handpiece Water Chilling Units is used to prepare the high temperature chilled water, its equipment is followed successively by second compressor, condenser, second fluid reservoir, second filter, second electric expansion valve, second evaporimeter by the order of connection, second evaporimeter links to each other with second compressor again and constitutes the loop, wherein the cryogenic freezing water section is from second evaporimeter, through second surface cooler, get back to second evaporimeter through second magnetic valve, second water pump again.Set up the 3rd magnetic valve, the 4th magnetic valve, the 5th magnetic valve at the chilled water import and export of first surface cooler and second surface cooler,, made first surface cooler, second surface cooler can realize that series connection feeds the high temperature chilled water by regulating the switching of 3 magnetic valves.
The air-treatment method of the wet segment processing of the present invention heat is: indoor return air with after newly wind mixes at first through first surface cooler and the heat exchange of high temperature chilled water, through etc. wet cooling near dew-point temperature, enter second surface cooler after removing most of sensible heat load; In second surface cooler, air and the further heat exchange of cryogenic freezing water, cooling also produces condensate water, removes humidity load; Air heater via behind the cool-down dehumidification, humidifier are handled the ventilation state point, finally send into air-conditioned room after the blower fan pressurization.
The scheme that the air-conditioning unit device of the wet segment processing of the present invention's heat is taked is: cold-producing medium enters condenser condenses in first handpiece Water Chilling Units after being discharged by first compressor compresses, then through first fluid reservoir and first filter, again by after the first electric expansion valve throttling step-down, enter first evaporimeter and chilled water and carry out heat exchange, cold-producing medium heat absorption evaporation, chilled water temperature reduces simultaneously, produce the high temperature chilled water, sucked compression by first compressor once more after cold-producing medium evaporates fully, thereby realize circulation.The high temperature chilled water flows into first surface cooler through the 3rd magnetic valve under the driving of first water pump, carry out heat exchange with air, absorbs airborne sensible heat, gets back to first evaporimeter through first magnetic valve, first water pump then.Cold-producing medium enters condenser condenses in second handpiece Water Chilling Units after being discharged by second compressor compresses, then through second fluid reservoir and second filter, entered second evaporimeter after the second electric expansion valve throttling step-down again, cold-producing medium and chilled water heat exchange, cryogenic freezing water is produced in heat absorption, cold-producing medium evaporates the back fully and is sucked once more by second compressor, thereby finishes circulation.The driving that cryogenic freezing water is subjected to second water pump flows into second surface cooler, absorbs airborne latent heat, and self temperature raises, and gets back to second evaporimeter through second magnetic valve, second water pump then.
There is the more time under sub-load, low humidity load, to move at the air-conditioning unit, the present invention designs the energy-saving run scheme under sub-load, the low humidity load condition: under part, low humidity load condition, second handpiece Water Chilling Units quits work, and does not prepare cryogenic freezing water.The first handpiece Water Chilling Units operate as normal, second magnetic valve, the 3rd closed electromagnetic valve, the 4th magnetic valve, the 5th magnetic valve are opened, and first surface cooler, second surface cooler form series connection.The high temperature chilled water enters second surface cooler through the 5th magnetic valve from first evaporimeter under the driving of first water pump, flow into first surface cooler through the 4th magnetic valve again after the outflow, comes out after first magnetic valve, first water pump are got back to first evaporimeter.The air handling process of this moment is: indoor return air with after newly wind mixes through first surface cooler, second surface cooler and the heat exchange of high temperature chilled water, cool-down dehumidification, heater via, humidifier are handled the ventilation state point then, finally send into air-conditioned room after the blower fan pressurization.Promptly change the flow (flow diminish, the leaving water temperature of first evaporimeter with corresponding reduction, flow become greatly then opposite) of high temperature chilled water by regulating the rotating speed of first water pump this moment, and realization high temperature chilled water is born fraction and removed humidity load.
Two compressors in two handpiece Water Chilling Units adopt certain one form that becomes.Use variable conpacitance compressor to be used to prepare the high temperature chilled water in first handpiece Water Chilling Units, use the constant volume compressor to be used to prepare cryogenic freezing water in second handpiece Water Chilling Units.When air-conditioning system was in operation at part load, variable conpacitance compressor carried out energy adjustment, adapted to the load needs.During less when total load, that latent heat load is little situation, second handpiece Water Chilling Units is shut down, and cooling load prepares the high temperature chilled water by variable conpacitance compressor fully and bears.
Beneficial effect: the invention has the beneficial effects as follows, when satisfying the air conditioner dehumidification burden requirement, sensible heat load and humidity load segment processing with air conditioner load, realize improving the evaporating temperature of handpiece Water Chilling Units, and then improve the Energy Efficiency Ratio of whole air-conditioning system, improve energy utilization rate, whole apparatus structure is simple, compactness.Also can make full use of device resource during sub-load, energy-conservation, have good and economic.
Description of drawings
Fig. 1 is the air-conditioning unit device schematic diagram of the wet segment processing of the present invention's heat.
Have among the figure: fresh wind port 1; Return air inlet 2; First surface cooler 3; Second surface cooler 4; Heater 5; Humidifier 6; Blower fan 7; Air outlet 8; First water pump 9; First evaporimeter 10; First compressor 11; Condenser 12; Condenser first input end 12a; The condenser first output 12b; The condenser second input 12c; The condenser second output 12d; First fluid reservoir 13; First filter 14; First electric expansion valve 15; Second fluid reservoir 16; Second filter 17; Second electric expansion valve 18; Second evaporimeter 19; Second compressor 20; Second water pump 21; First magnetic valve 22; Second magnetic valve 23; The 3rd magnetic valve 24; The 4th magnetic valve 25; The 5th magnetic valve 26; Cooling water turnover pipe 27.
The specific embodiment
1 further specify the specific embodiment of the present invention in conjunction with the accompanying drawings: the air-conditioning unit device based on the wet segment processing of heat comprises air-treatment part (I) and handpiece Water Chilling Units part (II), wherein the air-treatment part is made up of first surface cooler 3, second surface cooler 4, heater 5, humidifier 6 and blower fan 7, and is connected in sequence by casing.Handpiece Water Chilling Units partly comprises first handpiece Water Chilling Units and second handpiece Water Chilling Units, concrete connected mode is the output termination condenser first input end 12a of the first handpiece Water Chilling Units compressor 11, the condenser first output 12b connects first fluid reservoir, 13 inputs, first fluid reservoir, 13 outputs connect first electric expansion valve, 15 inputs by first filter 14, first electric expansion valve, 15 output terminations, first evaporimeter, 10 inputs, first evaporimeter, 10 output terminations, first compressor, 11 inputs.The chilled water output of first evaporimeter 10 connects the chilled water input of first surface cooler 3 by the 3rd magnetic valve 24, the chilled water output of first surface cooler 3 connects the input of first water pump 9, the chilled water input of output termination first evaporimeter 10 of first water pump 9 by first magnetic valve 22.The compressor 20 output termination condensers second input 12c of second handpiece Water Chilling Units, the condenser second output 12d connects second fluid reservoir, 16 inputs, second fluid reservoir, 16 outputs connect second electric expansion valve, 18 inputs by second filter 17, second electric expansion valve, 18 output terminations, second evaporimeter, 19 inputs, second evaporimeter, 19 output terminations, second compressor, 20 inputs.The chilled water input of chilled water output termination second surface cooler 4 of second evaporimeter 19, link to each other with the chilled water output of first evaporimeter 10 by the 5th magnetic valve 26 simultaneously, the chilled water output of second surface cooler 4 connects the input of second water pump 21 by second magnetic valve 23, link to each other the chilled water input of output termination second evaporimeter 19 of second water pump 21 with the chilled water input of first surface cooler 3 by the 4th magnetic valve 25 simultaneously.
The wet segmentation process of air heat is: new wind, indoor return air enter air-conditioning box by fresh wind port, return air inlet respectively and mix, through first surface cooler and the heat exchange of high temperature chilled water, through etc. after the wet cooling, remove most of sensible heat load, enter second surface cooler, air and the heat exchange of cryogenic freezing water in second surface cooler are further lowered the temperature and are produced condensate water, remove humidity load, air is indoor through finally sending into from air outlet behind heater, humidifier, the blower fan successively then.
The course of work of handpiece Water Chilling Units is: enter condenser cold-producing medium is compressed discharge in first compressor after and carry out condensation, be condensed into behind the liquid successively through first fluid reservoir, behind first filter by the first electric expansion valve throttling step-down, enter first evaporator evaporation, produce the high temperature chilled water, after evaporating fully, cold-producing medium sucked compression by first compressor once more, thereby form circulation, finish and produce the high temperature chilled water, the high temperature chilled water in first evaporimeter with the cold-producing medium heat exchange, emit heat, temperature reduces the back and enters first surface cooler (this moment the 4th magnetic valve by the 3rd magnetic valve, the 5th closed electromagnetic valve), chilled water therein with the air heat exchange, temperature reduces the back by first magnetic valve, first water pump enters first evaporimeter once more.Cold-producing medium enters condenser condenses be compressed discharge in second compressor after, be condensed into behind the liquid successively through second fluid reservoir, behind second filter, become gas-liquid two-phase by the second electric expansion valve throttling step-down again and enter second evaporimeter, cold-producing medium evaporates therein produces cryogenic freezing water, after evaporating fully, cold-producing medium enters second compressor compresses once more, thereby form circulation, cryogenic freezing water in second evaporimeter with the cold-producing medium heat exchange, emit heat, after reducing, temperature enters second surface cooler (this moment the 4th magnetic valve, the 5th closed electromagnetic valve), chilled water therein with the air heat exchange, temperature reduces the back by second magnetic valve, second water pump enters second evaporimeter once more.
When air-conditioning in sub-load, low humidity load condition following time, the air-conditioning unit switches to the running on the lower load operation, first magnetic valve, the 4th magnetic valve, the 5th magnetic valve are opened at this moment, second magnetic valve, the 3rd closed electromagnetic valve, and first surface cooler, the series connection of second surface cooler insert the high temperature chilled water.Second compressor, second water pump are out of service.The flow of refrigerant loop is constant in first handpiece Water Chilling Units, after coming out from first evaporimeter, chilled water part high temperature chilled water enters second surface cooler through the 5th magnetic valve (the 3rd closed electromagnetic valve this moment), after coming out from second surface cooler, chilled water enters first surface cooler by the 4th magnetic valve, and chilled water comes out to finish the chilled water circulation through entering first evaporimeter behind first magnetic valve, first water pump once more from first surface cooler.Rotating speed (promptly regulating the flow of water pump) by regulating first water pump under this operating mode and first compressor is carried out varying capacity control can realize coupling between unit refrigerating capacity and the air-conditioning total load.
From above process as can be seen, adopt the air-conditioning unit device of the wet segment processing of heat, under general operating mode, the air sensible heat load is mainly handled by the high temperature chilled water, and this part cold is produced by first handpiece Water Chilling Units.First handpiece Water Chilling Units is produced the high temperature chilled water, and evaporating temperature is higher, and Energy Efficiency Ratio can be significantly improved.Under running on the lower load, whole hot humidity loads are all handled by the high temperature chilled water, and cold is all produced by first handpiece Water Chilling Units.Because the first kind of refrigeration cycle evaporating temperature is higher, the Energy Efficiency Ratio height, the unit power consumption reduces, and the unit overall performance significantly promotes.