CN101666526A - Temperature adjusting and dehumidifying air-conditioning unit with double evaporators - Google Patents

Temperature adjusting and dehumidifying air-conditioning unit with double evaporators Download PDF

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Publication number
CN101666526A
CN101666526A CN200910183355A CN200910183355A CN101666526A CN 101666526 A CN101666526 A CN 101666526A CN 200910183355 A CN200910183355 A CN 200910183355A CN 200910183355 A CN200910183355 A CN 200910183355A CN 101666526 A CN101666526 A CN 101666526A
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air
temperature
outlet
condenser
inlet
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CN101666526B (en
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余延顺
钱普华
张少凡
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Nanjing University of Science and Technology
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Nanjing University of Science and Technology
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Abstract

The invention discloses a temperature adjusting and dehumidifying air-conditioning unit with double evaporators, which forms a temperature adjusting and dehumidifying system with double evaporators byusing two evaporators, two condensers, a compressor, a liquid reservoir, a gas-liquid separator, an expansion valve, an electromagnetic valve and a refrigerant pipeline, controls the humidity of theoutlet air of the unit by adjusting the flow rate of air flowing through the two evaporators according to the humidity content of the indoor air of the adjusted area or the inlet air of the unit, controls the temperature of the outlet air of the unit by adjusting the flow rate of the refrigerant flowing through the two condensers according to the temperature of the indoor air of the adjusted areaor the inlet air of the unit, and realizes the continuous and independent control of the parameters of the temperature and the humidity of the outlet air of the unit. The two evaporators have different evaporating temperatures. The invention has wide application range and good adjusting performance, can be suitable for the temperature adjusting and dehumidifying application places where the heat load and the humidity load have a wider range of change, and is especially suitable for the underground construction and air-conditioning application places with high requirements for dehumidifying.

Description

A kind of double evaporators temperature adjusting and dehumidifying air-conditioning unit
Technical field
The present invention relates to a kind of freeze drying equipment, relate in particular to a kind of double evaporators temperature adjusting and dehumidifying air-conditioning equipment, belong to refrigeration, air-conditioning and dehumidifying technology field, be specially adapted to the air conditioning applications occasion that underground engineering and dehumidifying are had relatively high expectations.
Background technology
Freezing temperature adjusting and dehumidifying air-conditioning unit is to utilize its evaporimeter that air is carried out cool-down dehumidification, and by reclaiming the airhandling equipment that the air of unit partial condensation heat after to freeze drying heats, be a kind of efficient, energy-conservation dehumidification mode, be widely used in the dehumidifying of underground engineering and the removal moisture drying of temperature control and grain, timber and food etc. at present.
Common cooled dehumidifier unit mainly contains cooling type, heating type and three kinds of forms of temperature-adjusting type at present.Cooling type dehumidifier is to be made of an indoor evaporator, an outdoor condenser, air carries out freeze drying and cooling through indoor evaporator, this type dehumidifier can only be used for refrigeration duty and humidity load is big and the more stable application scenario of heat moisture ratio, after being transferred regional heat moisture ratio to change, be difficult to adapt to dual effective control of humidity and temperature.The heating type dehumidifier is made of an indoor evaporator and an indoor condenser, air is after carrying out cool-down dehumidification through indoor evaporator, heating through indoor condenser raises air themperature again, this type dehumidifier can realize being transferred the dehumidifying and the heat supply function in zone, but can not realize the purpose of temperature adjustment, only be applicable to the application scenario of have a surplus humidity load and thermic load demand.Temperature-adjustable dehumidifier then is on heating type dehumidifier basis, at condenser in parallel with indoor condenser or connect of outdoor increase, utilize indoor evaporator that air is carried out cool-down dehumidification during unit operation, and the air of the partial condensation heat that reclaims unit by indoor condenser after evaporimeter is handled carry out temperature adjustment, and condensation heat more than needed then is distributed in the environment by outdoor condenser.Wu Jin etc. to method of temperature control and the thermoregulation effect of double-condenser under different connection modes of temperature-adjustable dehumidifier carried out analyzing (Wu Jin, Zhang Jianzhen. the analysis of the double-condenser connection mode of temperature-adjustable dehumidifier, Refrigeration ﹠ Air-Conditioning, 2007,7 (4): 84-7.).Zhu Zhi equality has been announced a kind of condenser parallel connection " non-blind zone temperature regulating dehumidifying machine " (Chinese invention patent, number of patent application: 200610088389.5), this temperature-adjustable dehumidifier is connected in parallel indoor air-cooled condenser and outdoor water-cooled condenser by cold-producing medium threeway ratio adjusting valve, after indoor air-cooled condenser temperature adjustment, send into by the accent zone by the air behind the evaporimeter cool-down dehumidification, can realize the continuous adjusting of leaving air temp in 16.6 ℃~38.5 ℃ scopes, though this scheme can be eliminated the temperature adjustment blind area of dehumidifier to a certain extent, but the prerequisite that relies on the unit condensation heat that temperature adjustment is carried out in air-out is the necessary continuous operation of compressor, and this dehumidifier adopts dibit control to humidity.Therefore; whether compressor operating depends on whether indoor humidity reaches design load; after it reaches humidity set point; compressor shutdown; this moment, dehumidifier was lost the temperature adjustment function of air-supply; will inevitably cause that bigger fluctuation appears in indoor temperature and humidity, promptly be difficult to realize effective adjusting and control, particularly in heat moisture ratio and humidity load variation occasion greatly to indoor temperature and humidity.The double-condenser temperature-adjustable dehumidifier that Wu Maojie etc. connect with outdoor condenser to indoor condenser has carried out studying (Wu Maojie, Liu Fengtian, the field dimension. about the research of temperature-adjustable dehumidifier temperature adjustment blind area. the building heat-energy air conditioner, 2001,4,12-14.), point out that there is the temperature adjustment blind area in the dehumidifier leaving air temp under double-condenser series connection situation, promptly this type dehumidifier when being in temperature adjustment blind area parameter be by the air supply parameter of transferring the zone to require can't satisfied temperature and the control of humidity require.
In sum, present temperature-adjustable dehumidifier can only be applicable to specific application scenario, regulating power is relatively poor, narrow application range, can't realize dual continuous adjusting to leaving air temp and humidity, promptly be difficult to realize change tangible occasion to being transferred dual effective regulation and control of regional temperature and humidity in some hot humidity loads, prior art is difficult to the fine satisfied actual temperature that requires and the good control of humidity.
Summary of the invention
At the deficiencies in the prior art and defective, the object of the present invention is to provide a kind of double evaporators temperature adjusting and dehumidifying air-conditioning unit, to realize the dual continuous adjusting of temperature-adjustable dehumidifier leaving air temp and humidity parameter, reach to transferred regional temperature and humidity continuously, independent control, the scope of application of expansion temperature-adjustable dehumidifier also improves the runnability of unit.
The technical solution that realizes the object of the invention is: double evaporators temperature adjusting and dehumidifying air-conditioning unit of the present invention, this unit is by two evaporimeters, two condensers, compressor, reservoir, gas-liquid separator, expansion valve, magnetic valve and refrigerant line constitute double evaporators temperature adjusting and dehumidifying system, and according to the air-out humidity of being regulated the air flow control unit of two evaporimeters of flowing through by the water capacity of regional room air of accent or unit air intake, according to being transferred regional room air or unit EAT to regulate the leaving air temp of the refrigerant flow control unit of two condensers of flowing through, realize the continuous of unit leaving air temp and humidity parameter, independent control; Described two evaporimeters have different evaporating temperatures.
Double evaporators temperature adjusting and dehumidifying air-conditioning unit of the present invention, comprise series connection freeze drying part and compression condensation part, compression condensation comprises that partly is used to a compressor that sucks gaseous refrigerant and compress output, a cold-producing medium threeway ratio adjusting valve that links to each other with the exhaust outlet of compressor, first condenser that is connected with the b end of cold-producing medium threeway ratio adjusting valve, second condenser that is connected with a end of cold-producing medium threeway ratio adjusting valve, a high pressure reservoir that links to each other with the outlet of first condenser and second condenser, second condenser is indoor condenser; Series connection freeze drying partly comprises the gas-liquid separator that an outlet links to each other with the air entry of compressor, also comprises first expansion valve that an inlet is connected with the outlet of high pressure reservoir in series connection freeze drying part; The high-temperature evaporator that inlet is connected with the outlet of first expansion valve; The cryogenic vaporizer that outlet is connected with the gas-liquid separator inlet; The flash evaporation that inlet is connected with the outlet of high-temperature evaporator, the liquid phase outlet of flash evaporation is connected with the inlet of first magnetic valve, second expansion valve and cryogenic vaporizer successively by refrigerant line, the gaseous phase outlet of flash evaporation is divided into two-way in parallel, one the tunnel is connected with the inlet of the 3rd expansion valve, another road is connected with the inlet of second magnetic valve, and the outlet of the 3rd expansion valve, second magnetic valve and the outlet of cryogenic vaporizer are connected with the inlet of gas-liquid separator after by the refrigerant line parallel connection.
Double evaporators temperature adjusting and dehumidifying air-conditioning unit of the present invention, comprise compression condensation part and freeze drying part in parallel, compression condensation comprises that partly is used to a compressor that sucks gaseous refrigerant and compress output, a cold-producing medium threeway ratio adjusting valve that links to each other with exhaust outlet of compressor, first condenser that is connected with the b end of cold-producing medium threeway ratio adjusting valve, second condenser that is connected with a end of cold-producing medium threeway ratio adjusting valve, a high pressure reservoir that links to each other with the outlet of first condenser and second condenser, second condenser is indoor condenser; Freeze drying in parallel partly comprises the gas-liquid separator that an outlet links to each other with the air entry of compressor, in freeze drying part in parallel, also comprise the low-temperature expansion valve that an outlet links to each other with the inlet of cryogenic vaporizer, first expansion valve that outlet links to each other with the inlet of high-temperature evaporator, the inlet of the inlet of low-temperature expansion valve and first expansion valve are connected with the outlet of high pressure reservoir after by the refrigerant line parallel connection; The outlet of high-temperature evaporator is divided into two-way in parallel, one the tunnel is connected with the inlet of the 3rd expansion valve, another road is connected with the inlet of second magnetic valve, and the outlet of the 3rd expansion valve, second magnetic valve and the outlet of cryogenic vaporizer are connected with the inlet of gas-liquid separator after by the refrigerant line parallel connection.
The present invention compared with prior art, its remarkable advantage: the present invention adopts a high-temperature evaporator and the cryogenic vaporizer by the wet cooling condition operation by dry cooling condition or the operation of little wet cooling condition that the unit intake air is carried out the cool-down dehumidification processing, and regulate the air-out humidity of the air quantity control unit of two evaporimeters of flowing through by three ventilation ratio adjusting valves according to the air intake water capacity, regulate the leaving air temp that adds heat controlling machine set of second condenser simultaneously according to EAT, effectively realized the continuous of unit leaving air temp and humidity, independent control, improved the temperature adjusting and dehumidifying performance of unit, can satisfy the needs of different hot humidity loads, make and transferred regional indoor temperature and humidity to be controlled effectively, improved the adaptability of unit.Applied range of the present invention, adjusting function is good, can adapt to the temperature adjusting and dehumidifying application scenario that hot humidity load relative broad range changes.
Description of drawings
Fig. 1 is a kind of structure principle chart of double evaporators temperature adjusting and dehumidifying air-conditioning unit of the present invention.
Fig. 2 is the another kind of structure principle chart of double evaporators temperature adjusting and dehumidifying air-conditioning unit of the present invention.
Fig. 3 is enthalpy-wet (i-d) figure of double evaporators temperature adjusting and dehumidifying air-conditioning unit air handling process of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the invention process process is further described.
Double evaporators temperature adjusting and dehumidifying air-conditioning unit of the present invention, this unit is regulated the air-out humidity of the air flow control unit of two evaporimeters of flowing through according to the water capacity of being transferred regional room air or unit air intake, and according to being transferred indoor air in zone or unit EAT to regulate the leaving air temp of the refrigerant flow control unit of two condensers of flowing through, realize unit leaving air temp and humidity parameter continuously, independent control.
In conjunction with Fig. 1, Fig. 1 is a kind of double evaporators temperature adjusting and dehumidifying air-conditioning unit structure principle chart provided by the invention.Double evaporators temperature adjusting and dehumidifying air-conditioning unit of the present invention, comprise series connection freeze drying part 19 and compression condensation part 20, compression condensation part 20 comprises that one is used for sucking gaseous refrigerants and compressing the compressor 1 of output from gas-liquid separator 14, a cold-producing medium threeway ratio adjusting valve 2 that links to each other with the exhaust outlet of compressor 1, first condenser, 3, the first condensers 3 that are connected with the b port of cold-producing medium threeway ratio adjusting valve 2 are used for to the environmental emission condensation heat; Second condenser, 4, the second condensers 4 that are connected with a port of cold-producing medium threeway ratio adjusting valve 2 are used to regulate the leaving air temp of unit; Cold-producing medium threeway ratio adjusting valve 2 is used to regulate the refrigerant flow that enters first condenser 3 and second condenser 4; A high pressure reservoir 5 that links to each other with the outlet of first condenser 3 and second condenser 4, high pressure reservoir 5 is used to store high pressure liquid refrigerant, and second condenser 4 is indoor condenser; Series connection freeze drying part 19 comprises the gas-liquid separator 14 that an outlet links to each other with the air entry of compressor 1, and this gas-liquid separator 14 is used for refrigerant air-liquid and separates; In series connection freeze drying part 19, also comprise first expansion valve 6 that an inlet is connected with the outlet of high pressure reservoir 5; The high-temperature evaporator 7 that inlet is connected with the outlet of first expansion valve 6, high-temperature evaporator 7 is used for air is cooled off; The cryogenic vaporizer 11 that outlet is connected with gas-liquid separator 14 inlets, cryogenic vaporizer 11 is used for air is carried out cool-down dehumidification; The flash evaporation 8 that inlet is connected with the outlet of high-temperature evaporator 7, the liquid phase outlet of flash evaporation 8 is connected with the inlet of first magnetic valve 9, second expansion valve 10 and cryogenic vaporizer 11 successively by refrigerant line, the gaseous phase outlet of flash evaporation 8 is divided into two-way in parallel, one the tunnel is connected with the inlet of the 3rd expansion valve 13, another road is connected with the inlet of second magnetic valve 12, and the outlet of the 3rd expansion valve 13, second magnetic valve 12 and the outlet of cryogenic vaporizer 11 are connected with the inlet of gas-liquid separator 14 after by the refrigerant line parallel connection.The complete double evaporators temperature adjusting and dehumidifying circulatory system that connects and composes by above-mentioned each parts.
In conjunction with Fig. 2, Fig. 2 is an another kind of double evaporators temperature adjusting and dehumidifying air-conditioning unit structure principle chart provided by the invention.Double evaporators temperature adjusting and dehumidifying air-conditioning unit of the present invention, comprise compression condensation part 20 and freeze drying part 21 in parallel, compression condensation part 20 comprises that one is used for sucking gaseous refrigerants and compressing the compressor 1 of output from gas-liquid separator 14, a cold-producing medium threeway ratio adjusting valve 2 that links to each other with the exhaust outlet of compressor 1, first condenser, 3, the first condensers 3 that are connected with the b port of cold-producing medium threeway ratio adjusting valve 2 are used for to the environmental emission condensation heat; Second condenser, 4, the second condensers 4 that are connected with a port of cold-producing medium threeway ratio adjusting valve 2 are used to regulate the leaving air temp of unit; Cold-producing medium threeway ratio adjusting valve 2 is used to regulate the refrigerant flow that enters first condenser 3 and second condenser 4; A high pressure reservoir 5 that links to each other with the outlet of first condenser 3 and second condenser 4, high pressure reservoir 5 is used to store high pressure liquid refrigerant, and second condenser 4 is indoor condenser; Freeze drying part 21 in parallel comprises the gas-liquid separator 14 that an outlet links to each other with the air entry of compressor 1, and gas-liquid separator 14 is used for cold-producing medium and carries out gas-liquid separation; Also comprise the low-temperature expansion valve 17 that an outlet links to each other with the inlet of cryogenic vaporizer 11 in freeze drying part 21 in parallel, cryogenic vaporizer 11 is used for air cooling-down is dehumidified; First expansion valve 6 that outlet links to each other with the inlet of high-temperature evaporator 7, high-temperature evaporator 7 is used for air is cooled off, the inlet of high-temperature evaporator 7 and cryogenic vaporizer 11 is connected with the outlet of first expansion valve 6 and the outlet of low-temperature expansion valve 17 respectively, and the inlet of the inlet of low-temperature expansion valve 17 and first expansion valve 6 is connected with the outlet of high pressure reservoir 5 after by the refrigerant line parallel connection; The outlet of high-temperature evaporator 7 is divided into two-way in parallel, one the tunnel is connected with the inlet of the 3rd expansion valve 13, another road is connected with the inlet of second magnetic valve 12, and the outlet of the 3rd expansion valve 13, second magnetic valve 12 and the outlet of cryogenic vaporizer 11 are connected with the inlet of gas-liquid separator 14 after by the refrigerant line parallel connection.The complete double evaporators temperature adjusting and dehumidifying circulatory system that connects and composes by above-mentioned each parts.
Double evaporators temperature adjusting and dehumidifying air-conditioning unit of the present invention, also comprise one three ventilating duct 15, high-temperature evaporator 7 and cryogenic vaporizer 11 place respectively on two branch lines of three ventilating ducts 15, and second condenser 4 is installed in the interflow pipeline section of downstream three ventilating ducts 15 of high-temperature evaporator 7 and cryogenic vaporizer 11.
Double evaporators temperature adjusting and dehumidifying air-conditioning unit of the present invention, also comprise one three ventilation ratio adjusting valve 16, three ventilation ratio adjusting valves 16 are installed in the inlet air channel of high-temperature evaporator 7 and cryogenic vaporizer 11, in order to the flow through air quantity of high-temperature evaporator 7 and cryogenic vaporizer 11 of adjusting.
Double evaporators temperature adjusting and dehumidifying air-conditioning unit of the present invention, the evaporating temperature in the high-temperature evaporator 7 is higher than the evaporating temperature in the cryogenic vaporizer 11.
Double evaporators temperature adjusting and dehumidifying air-conditioning unit of the present invention, high-temperature evaporator 7 are mainly born the refrigeration duty of being transferred in the zone, by dry cooling condition or the operation of little wet cooling condition to the air of the flowing through processing of lowering the temperature; Cryogenic vaporizer 11 is born the refrigeration duty and the humidity load of being transferred in the zone simultaneously, by the wet cooling condition operation air of flowing through is carried out cool-down dehumidification and handles.
Flow through high-temperature evaporator 7 and cryogenic vaporizer 11 mixed air of double evaporators temperature adjusting and dehumidifying air-conditioning unit of the present invention, 4 pairs of second condensers heat temperature adjustment and handle, and regulate the condenser heat of second condenser 4 by cold-producing medium threeway ratio adjusting valve 2.
Double evaporators temperature adjusting and dehumidifying air-conditioning unit of the present invention, first expansion valve 6, second expansion valve 10, the 3rd expansion valve 13, low-temperature expansion valve 17 adopt heating power expansion valve or electric expansion valve.
In conjunction with Fig. 3, Fig. 3 is enthalpy-wet (i-d) figure of a kind of double evaporators temperature adjusting and dehumidifying air-conditioning unit air handling process provided by the invention.The N point is transferred regional indoor design condition point among the figure, and this corresponding temperature is t Set, water capacity is d SetE 1Point is high-temperature evaporator 7 outlet air state points, and this corresponding temperature is t 1, water capacity is d SetE 2Point is cryogenic vaporizer 11 outlet air state points, and this corresponding temperature is t 2, water capacity is d 2The C point is that high-temperature evaporator 7 and cryogenic vaporizer 11 are handled back Air mixing state point, and this corresponding temperature is t c, water capacity is d cThe S point is a unit air-out state point, and this corresponding temperature is t s, water capacity is d cN → E 1Air handling process line for high-temperature evaporator 7; N → E 2Air handling process line for cryogenic vaporizer 11; E 2→ C ← E 1Be high-temperature evaporator 7 and cryogenic vaporizer 11 outlet air mixed process lines; C → S is the temperature adjustment graph of second condenser 4; S → N is a heat moisture ratio line of being transferred the zone.
Embodiment 1:
Fig. 1 is a kind of double evaporators temperature adjusting and dehumidifying air-conditioning unit structure principle chart provided by the invention.Pressing Fig. 1 is connected the exhaust outlet of compressor 1 by the inlet of refrigerant line with cold-producing medium threeway ratio adjusting valve 2, and a port of cold-producing medium threeway ratio adjusting valve 2 is connected with the inlet of second condenser 4 and the inlet of first condenser 1 respectively with the b port, simultaneously with the outlet of the outlet of first condenser 3 and second condenser 4 by inserting the inlet of high pressure reservoir 5 after the refrigerant line parallel connection, constitute the compression condensation part 20 of temperature adjusting and dehumidifying unit.In series connection freeze drying part 19, the inlet of high-temperature evaporator 7 is connected with the outlet of high pressure reservoir 5 by first expansion valve 6, the outlet of high-temperature evaporator 7 is connected with the inlet of flash evaporation 8, the liquid phase outlet of flash evaporation 8 is successively by first magnetic valve 9, second expansion valve 10 is connected with the inlet of cryogenic vaporizer 11, the gaseous phase outlet of flash evaporation 8 is divided into two-way in parallel is connected back access in parallel with the outlet of cryogenic vaporizer 11 gas-liquid separator 14 respectively with the 3rd expansion valve 13 and second magnetic valve 12 inlet, and the outlet of gas-liquid separator 14 is connected with the air entry of compressor 1.Simultaneously high-temperature evaporator 7 and cryogenic vaporizer 11 are installed on respectively on two branch lines of three ventilating ducts 15, low-temperature condenser 4 is installed in the interflow pipeline section of downstream three ventilating ducts 15 of high-temperature evaporator 7 and cryogenic vaporizer 11, and three ventilation ratio adjusting valves 16 is installed at the inlet of three ventilating ducts 15.First expansion valve 6, second expansion valve 10 and the 3rd expansion valve 13 adopt heating power expansion valve.
The evaporating temperature that this double evaporators temperature adjusting and dehumidifying air-conditioning unit is set cryogenic vaporizer 11 according to Temperature and Relative Humidity of Indoor Air control parameter request is t El, the evaporating temperature of high-temperature evaporator 7 is t Eh, and make the hull-skin temperature of cryogenic vaporizer 11 be lower than the dew-point temperature t of unit air intake Dew, the hull-skin temperature of high-temperature evaporator 7 is not less than the dew-point temperature t of unit air intake DewDuring design conditions, three ventilation ratio adjusting valves 16 and cold-producing medium threeway ratio adjusting valve 2 aperture that all mediates, first magnetic valve 9 is opened, and second magnetic valve 12 cuts out.Regulate the air-out humidity of the air quantity of flow through high-temperature evaporator 7 and cryogenic vaporizer 11 according to the water capacity of unit intake air during the temperature adjusting and dehumidifying operation with the control unit, and according to the refrigerant flow of intake air adjustment second condenser 4 leaving air temp with the control unit, realize to transferred regional indoor temperature and humidity continuously, independent control.
(a) air-out humidity of unit control
When unit moves in design conditions, three ventilation ratio adjusting valves 16 aperture that mediates, first magnetic valve 9 is opened, and second magnetic valve 12 cuts out.Water capacity d when the unit intake air InBe lower than the setting value d of room air water capacity SetThe time, the aperture of regulating three ventilation ratio adjusting valves 16 reduces the air quantity of cryogenic vaporizer 11 and increases the air quantity of high-temperature evaporator 7, reduces the dehumidifying effect of unit, is transferred regional indoor humidity to reach setting value with control; Water capacity d when the unit intake air InReach or less than the preset lower limit d of room air water capacity MinThe time, close first magnetic valve 9, open second magnetic valve 12, and regulate three ventilation ratio adjusting valves 16, make all air high-temperature evaporator 7 of all flowing through, unit is pressed dry cooling condition cooling operation.Water capacity d when the unit intake air InThe setting value d that is higher than the room air water capacity SetThe time, the aperture of regulating three ventilation ratio adjusting valves 16 reduces the air quantity of high-temperature evaporator 7 with the air quantity that increases cryogenic vaporizer 11, increase the dehumidifying effect of unit, is transferred regional indoor humidity to reach setting value with control; Water capacity d when the unit intake air InReach or be higher than the capping value d of room air water capacity MaxThe time, open first magnetic valve 9, close second magnetic valve 12, and regulate three ventilation ratio adjusting valves 16, make all air cryogenic vaporizer 11 of all flowing through, unit is pressed the operation of wet cooling condition cool-down dehumidification.
(b) leaving air temp of unit control
Air themperature t when the unit inlet InBe lower than the setting value t of indoor air temperature SetThe time, the aperture of regulating cold-producing medium threeway ratio adjusting valve 2, increase by second condenser 4 refrigerant flow, reduce the refrigerant flow of first condenser 3, increase the heat that adds of unit, transferred regional indoor air temperature to reach setting value with control; Temperature t when the unit intake air InReach or less than the preset lower limit t of indoor air temperature MinThe time, to regulate cold-producing medium threeway ratio adjusting valve 2 and make ownership cryogen second condenser 4 of all flowing through, the mixing air after whole condensation heat of utilizing unit are handled high-temperature evaporator 7 and cryogenic vaporizer 11 carries out heat treated.Intake air temperature t when unit InThe setting value t that is higher than indoor air temperature SetThe time, the aperture of regulating cold-producing medium threeway ratio adjusting valve 2 reduces the refrigerant flow of second condenser 4, the refrigerant flow of increase by first condenser 3, reduces the heat that adds of unit, is transferred regional indoor air temperature to reach setting value with control.
Embodiment 2:
Fig. 2 is an another kind of double evaporators temperature adjusting and dehumidifying air-conditioning unit structure principle chart provided by the invention.Pressing Fig. 2 is connected the exhaust outlet of compressor 1 by the inlet of refrigerant line with cold-producing medium threeway ratio adjusting valve 2, and a port of cold-producing medium threeway ratio adjusting valve 2 is connected with the inlet of second condenser 4 and the inlet of first condenser 1 respectively with the b port, simultaneously with the outlet of the outlet of first condenser 3 and second condenser 4 by inserting the inlet of high pressure reservoir 5 after the refrigerant line parallel connection, constitute the compression condensation part 20 of temperature adjusting and dehumidifying unit.The outlet of high pressure reservoir 5 is divided into two-way in parallel, be connected with the inlet of cryogenic vaporizer 11 and the inlet of high-temperature evaporator 7 with first expansion valve 6 by the low-temperature expansion valve 17 in the freeze drying part 21 in parallel respectively, the outlet of high-temperature evaporator 7 is divided into two-way in parallel is connected back access in parallel with the outlet of cryogenic vaporizer 11 gas-liquid separator 14 respectively with the 3rd expansion valve 13 and second magnetic valve 12 inlet, and the outlet of gas-liquid separator 14 is connected with the air entry of compressor 1.Simultaneously high-temperature evaporator 7 and cryogenic vaporizer 11 are installed on respectively on two branch lines of three ventilating ducts 15, low-temperature condenser 4 is installed in the interflow pipeline section of downstream three ventilating ducts 15 of high-temperature evaporator 7 and cryogenic vaporizer 11, and three ventilation ratio adjusting valves 16 is installed at the inlet of three ventilating ducts 15.First expansion valve 6, the 3rd expansion valve 13 and low-temperature expansion valve 17 adopt electric expansion valve.
The evaporating temperature that this double evaporators temperature adjusting and dehumidifying air-conditioning unit is set cryogenic vaporizer 11 according to Temperature and Relative Humidity of Indoor Air control parameter request is t El, the evaporating temperature of high-temperature evaporator 7 is t Eh, and make the hull-skin temperature of cryogenic vaporizer 11 be lower than the dew-point temperature t of unit air intake Dew, the hull-skin temperature of high-temperature evaporator 7 is not less than the dew-point temperature t of unit air intake DewDuring design conditions, three ventilation ratio adjusting valves 16 and cold-producing medium threeway ratio adjusting valve 2 aperture that all mediates, second magnetic valve 12 cuts out.Regulate the air-out humidity of the air quantity control unit of flow through high-temperature evaporator 7 and cryogenic vaporizer 11 during the temperature adjusting and dehumidifying operation according to the water capacity of unit intake air, and according to the leaving air temp of the refrigerant flow control unit of intake air adjustment second condenser 4, with realize to transferred regional indoor temperature and humidity continuously, independent control.
(a) air-out humidity of unit control
Water capacity d when the unit intake air InBe lower than the setting value d of room air water capacity SetThe time, the aperture of regulating three ventilation ratio adjusting valves 16 increases the air quantity of high-temperature evaporator 7 with the air quantity that reduces cryogenic vaporizer 11, reduce the dehumidifying effect of unit, is transferred regional indoor humidity to reach setting value with control; Water capacity d when the unit intake air InReach or less than the preset lower limit d of room air water capacity MinThe time, open second magnetic valve 12, and regulate three ventilation ratio adjusting valves 16, make all air high-temperature evaporator 7 of all flowing through, unit is pressed dry cooling condition cooling operation.Water capacity d when the unit intake air InThe setting value d that is higher than the room air water capacity SetThe time, the aperture of regulating three ventilation ratio adjusting valves 16 reduces the air quantity of high-temperature evaporator 7 with the air quantity that increases cryogenic vaporizer 11, increase the dehumidifying effect of unit, is transferred regional indoor humidity to reach setting value with control; Water capacity d when the unit intake air InReach or be higher than the capping value d of room air water capacity MaxThe time, second magnetic valve 12 cuts out, and regulates three ventilation ratio adjusting valves 16, makes all air cryogenic vaporizer 11 of all flowing through, and unit is pressed the operation of wet cooling condition cool-down dehumidification.
(b) leaving air temp of unit control
The control method of unit leaving air temp is with embodiment 1.
Temperature t when the unit intake air InBe lower than the setting value t of indoor air temperature SetThe time, the aperture of regulating cold-producing medium threeway ratio adjusting valve 2, increase by second condenser 4 refrigerant flow, reduce the refrigerant flow of first condenser 3, increase the heat that adds of unit, transferred regional indoor air temperature to reach setting value with control; Temperature t when the unit intake air InReach or less than the preset lower limit t of indoor air temperature MinThe time, to regulate cold-producing medium threeway ratio adjusting valve 2 and make ownership cryogen second condenser 4 of all flowing through, the mixing air after whole condensation heat of utilizing unit are handled high-temperature evaporator 7 and cryogenic vaporizer 11 carries out heat treated.Intake air temperature t when unit InThe setting value t that is higher than indoor air temperature SetThe time, the aperture of regulating cold-producing medium threeway ratio adjusting valve 2 reduces the refrigerant flow of second condenser 4, the refrigerant flow of increase by first condenser 3, reduces the heat that adds of unit, is transferred regional indoor air temperature to reach setting value with control.

Claims (9)

1, a kind of double evaporators temperature adjusting and dehumidifying air-conditioning unit, it is characterized in that: this unit is by two evaporimeters, two condensers, compressor, reservoir, gas-liquid separator, expansion valve, magnetic valve and refrigerant line constitute double evaporators temperature adjusting and dehumidifying system, and according to the air-out humidity of being regulated the air flow control unit of two evaporimeters of flowing through by the water capacity of regional room air of accent or unit air intake, according to being transferred regional room air or unit EAT to regulate the leaving air temp of the refrigerant flow control unit of two condensers of flowing through, realize the continuous of unit leaving air temp and humidity parameter, independent control; Described two evaporimeters have different evaporating temperatures.
2, double evaporators temperature adjusting and dehumidifying air-conditioning unit according to claim 1, comprise series connection freeze drying part (19) and compression condensation part (20), compression condensation part (20) comprises that is used to a compressor (1) that sucks gaseous refrigerant and compress output, a cold-producing medium threeway ratio adjusting valve (2) that links to each other with the exhaust outlet of compressor (1), first condenser (3) that is connected with the b port of cold-producing medium threeway ratio adjusting valve (2), second condenser (4) that is connected with a port of cold-producing medium threeway ratio adjusting valve (2), a high pressure reservoir (5) that links to each other with the outlet of first condenser (3) and second condenser (4), it is characterized in that: second condenser (4) is indoor condenser; Series connection freeze drying part (19) comprises the gas-liquid separator (14) that an outlet links to each other with the air entry of compressor (1), also comprises first expansion valve (6) that an inlet is connected with the outlet of high pressure reservoir (5) in series connection freeze drying part (19); The high-temperature evaporator (7) that inlet is connected with the outlet of first expansion valve (6); The cryogenic vaporizer (11) that outlet is connected with gas-liquid separator (14) inlet; The flash evaporation (8) that inlet is connected with the outlet of high-temperature evaporator (7), the outlet of the liquid phase of flash evaporation (8) by refrigerant line successively with first magnetic valve (9), the inlet of second expansion valve (10) and cryogenic vaporizer (11) connects, the gaseous phase outlet of flash evaporation (8) is divided into two-way in parallel, one the tunnel is connected with the inlet of the 3rd expansion valve (13), another road is connected with the inlet of second magnetic valve (12), the 3rd expansion valve (13), the outlet of the outlet of second magnetic valve (12) and cryogenic vaporizer (11) is connected with the inlet of gas-liquid separator (14) after by the refrigerant line parallel connection.
3, by the described double evaporators temperature adjusting and dehumidifying of claim 1 air-conditioning unit, comprise compression condensation part (20) and freeze drying in parallel part (21), compression condensation part (20) comprises that is used to a compressor (1) that sucks gaseous refrigerant and compress output, a cold-producing medium threeway ratio adjusting valve (2) that links to each other with compressor (1) exhaust outlet, first condenser (3) that is connected with the b end of cold-producing medium threeway ratio adjusting valve (2), second condenser (4) that is connected with a end of cold-producing medium threeway ratio adjusting valve (2), a high pressure reservoir (5) that links to each other with the outlet of first condenser (3) and second condenser (4), it is characterized in that: second condenser (4) is indoor condenser; Freeze drying part in parallel (21) comprises the gas-liquid separator (14) that an outlet links to each other with the air entry of compressor (1), in freeze drying part in parallel (21), also comprise the low-temperature expansion valve (17) that an outlet links to each other with the inlet of cryogenic vaporizer (11), first expansion valve (6) that outlet links to each other with the inlet of high-temperature evaporator (7), the inlet of the inlet of low-temperature expansion valve (17) and described first expansion valve (6) are connected with the outlet of high pressure reservoir (5) after by the refrigerant line parallel connection; The outlet of high-temperature evaporator (7) is divided into two-way in parallel, one the tunnel is connected with the inlet of the 3rd expansion valve (13), another road is connected with the inlet of second magnetic valve (12), and the outlet of the 3rd expansion valve (13), second magnetic valve (12) and the outlet of cryogenic vaporizer (11) are connected with the inlet of gas-liquid separator (14) after by the refrigerant line parallel connection.
4, according to claim 1,2 or 3 described double evaporators temperature adjusting and dehumidifying air-conditioning units, it is characterized in that: double evaporators temperature adjusting and dehumidifying air-conditioning unit also comprises one three ventilating duct (15), high-temperature evaporator (7) and cryogenic vaporizer (11) place respectively on two branch lines of three ventilating ducts (15), and second condenser (4) is installed in the interflow pipeline section of downstream three ventilating ducts (15) of high-temperature evaporator (7) and cryogenic vaporizer (11).
5, according to claim 1,2 or 3 described double evaporators temperature adjusting and dehumidifying air-conditioning units, it is characterized in that: double evaporators temperature adjusting and dehumidifying air-conditioning unit also comprises one three ventilation ratio adjusting valve (16), three ventilation ratio adjusting valves (16) are installed in the inlet air channel of high-temperature evaporator (7) and cryogenic vaporizer (11), in order to the flow through air quantity of high-temperature evaporator (7) and cryogenic vaporizer (11) of adjusting.
6, according to claim 1,2 or 3 described double evaporators temperature adjusting and dehumidifying air-conditioning units, it is characterized in that: the evaporating temperature in the high-temperature evaporator (7) is higher than the evaporating temperature in the cryogenic vaporizer (11).
7, according to claim 1,2 or 3 described double evaporators temperature adjusting and dehumidifying air-conditioning units, it is characterized in that: high-temperature evaporator (7) is mainly born the refrigeration duty of being transferred in the zone, by dry cooling condition or the operation of little wet cooling condition to the air of the flowing through processing of lowering the temperature; Cryogenic vaporizer (11) is born the refrigeration duty and the humidity load of being transferred in the zone simultaneously, by the wet cooling condition operation air of flowing through is carried out cool-down dehumidification and handles.
8, according to claim 1,2 or 3 described double evaporators temperature adjusting and dehumidifying air-conditioning units, it is characterized in that: second condenser (4) heats the temperature adjustment processing to high-temperature evaporator of flowing through (7) and the mixed air of cryogenic vaporizer (11), and regulates the condenser heat of second condenser (4) by cold-producing medium threeway ratio adjusting valve (2).
9, according to claim 1,2 or 3 described a kind of double evaporators temperature adjusting and dehumidifying air-conditioning units, it is characterized in that: first expansion valve (6), second expansion valve (10), the 3rd expansion valve (13), low-temperature expansion valve (17) adopt heating power expansion valve or electric expansion valve.
CN2009101833558A 2009-09-18 2009-09-18 Temperature adjusting and dehumidifying air-conditioning unit with double evaporators Expired - Fee Related CN101666526B (en)

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