CN109028360B - Household solution dehumidification air conditioning system - Google Patents
Household solution dehumidification air conditioning system Download PDFInfo
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- CN109028360B CN109028360B CN201810668788.1A CN201810668788A CN109028360B CN 109028360 B CN109028360 B CN 109028360B CN 201810668788 A CN201810668788 A CN 201810668788A CN 109028360 B CN109028360 B CN 109028360B
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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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion 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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F2003/144—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by dehumidification only
Abstract
The invention relates to a household solution dehumidification air-conditioning system, which consists of a vapor compression heat pump cycle, a solution dehumidification cycle and a solution regeneration cycle, and is divided into an indoor module and an outdoor module, wherein the indoor module is arranged in an air-conditioning room, and a suspended ceiling is installed; the outdoor module is arranged outside the air-conditioning room and fixed on the building wall, the indoor module is connected with the outdoor module through a refrigerant pipeline and a solution pipeline, and the building wall is provided with an air inlet channel and an air exhaust channel of the indoor module. The system miniaturizes the conventional solution dehumidification air conditioner, and adopts a split design to be suitable for installation and use of residential buildings; the solution dehumidification cycle is combined with the vapor compression heat pump cycle to realize refrigeration dehumidification in summer and heating humidification in winter simultaneously; the novel membrane-refrigerant coil composite assembly is adopted to solve the problem of carrying solution and improve the efficiency of air treatment. The new system can improve the overall energy efficiency of the air conditioning system while meeting the use requirements of residential buildings.
Description
Technical Field
The invention relates to air conditioning equipment, in particular to a household solution dehumidification air conditioning system.
Background
The solution dehumidification air conditioning system is a novel air conditioning mode for refrigerating and dehumidifying air based on a liquid desiccant, has considerable application prospects in the aspects of refrigerating, dehumidifying and air conditioning by utilizing low-grade heat energy (such as solar energy, industrial waste heat, condensation heat and the like), and has obvious advantages in the aspect of air humidity load treatment. Therefore, the system has outstanding energy-saving and environment-friendly potential and accords with the concept of sustainable development.
At present, in the systems related to research and product development, whether the systems are solution dehumidification air-conditioning systems driven by solar energy or waste heat energy or heat pump dehumidification air-conditioning systems driven by heat pumps with better operation stability and wider application range, the equipment volume and the occupied area of the systems are large, the systems are only suitable for centralized processing of air, and the systems are applied to large public buildings such as factories, offices, businesses, stations and airports, and special occasions such as museums, gymnasiums and natatories. The applications and designs currently disclosed for the miniaturization of solution desiccant air conditioning systems are also very limited, and split or residential systems suitable for residential buildings are only in the preliminary attempt. However, the solution dehumidification process has good filtering effect on VOCs (such as toluene and formaldehyde), can effectively kill bacteria and viruses in the air and filter micro-Particles (PMs), and is very favorable for improving the indoor air quality. Considering the influence of social development on factors such as the requirement for reducing the energy consumption of building air conditioners, the aggravation of haze and environmental pollution degrees, the rise of the attention degree of people to IAQ and the like, the solution dehumidification air conditioner has a wide development space in the fields of houses and small civil buildings, and is worthy of further system development and design.
Furthermore, the design, development and application of the existing solution dehumidification air-conditioning system are mainly focused on summer working conditions, the research on winter working conditions is lacked, and most of the existing products in the market only have the refrigeration and dehumidification functions. However, the solution regeneration process is realized for regenerating air by heating and humidifying, so that the solution dehumidification air-conditioning system actually has the heating and humidifying capacity in winter, only reasonable improvement on the existing system form is needed, and some unsolved problems are overcome. Meanwhile, the solution dehumidifying air conditioner with refrigerating and dehumidifying in summer and heating and humidifying in winter can better meet the use requirements of residential buildings.
On the other hand, the problem of carrying the solution in the air supply and exhaust air when the solution dehumidification air-conditioning system operates is also an obstacle to further popularization and application of the system. In response to this problem, some skilled in the art began to develop and apply membrane solution dehumidification methods. When the partial pressure difference of water vapor exists between the solution and the humid air, the selective permeable membrane has the characteristic of allowing the water vapor to permeate but preventing the liquid such as the solution and the like from passing through, and can effectively isolate the air from the dehumidifying solution. The membrane module can effectively solve the carrying problem of the dehumidification solution, but compared with a heat and mass transfer mode in which the solution is directly contacted with air, the heat and mass transfer capacity of the membrane module is slightly insufficient, particularly the dehumidification efficiency is not high, and the overall energy efficiency level of the system can be influenced to a certain extent. Therefore, improving the structure of the membrane module and trying to improve the heat and mass transfer capacity thereof are practical requirements for optimizing the solution dehumidification air-conditioning system.
Disclosure of Invention
The invention provides a household solution dehumidification air-conditioning system aiming at the problems existing in the design of the solution dehumidification air-conditioning system, the system miniaturizes the conventional solution dehumidification air-conditioning system, and adopts a split design to be suitable for being installed and used in residential buildings; the solution dehumidification cycle is combined with the vapor compression heat pump cycle to realize refrigeration dehumidification in summer and heating humidification in winter simultaneously; the novel membrane-refrigerant coil composite assembly is adopted to solve the problem of carrying solution and improve the efficiency of air treatment. The new system can improve the overall energy efficiency of the air conditioning system while meeting the use requirements of residential buildings.
The technical scheme of the invention is as follows: a household solution dehumidification air-conditioning system comprises a vapor compression heat pump cycle, a solution dehumidification cycle and a solution regeneration cycle, and is divided into an indoor module and an outdoor module, wherein the indoor module is arranged in an air-conditioning room, and a suspended ceiling is installed; the outdoor module is arranged outside the air-conditioning room and fixed on a building wall, the indoor module is connected with the outdoor module through a refrigerant pipeline and a solution pipeline, and the building wall is provided with an air inlet channel and an air exhaust channel of the indoor module;
indoor module wind return circuit: the method comprises the following steps that two air channels, namely a fresh air treatment air channel and a return air channel, are arranged, outdoor fresh air is sent into an indoor module from an inlet end of the fresh air treatment air channel by a first fan, indoor return air enters the indoor module from an inlet end of the return air channel under the action of a second fan, the fresh air and the return air exchange heat in a first air-air heat exchanger, the fresh air coming out of the first air-air heat exchanger enters a first membrane-refrigerant coil composite assembly for humidity exchange and heat exchange, then the fresh air is sent into a primary air inlet end at the upper part of a second air-air heat exchanger, then enters an indoor air heating cooler for heat treatment and then is sent into a secondary air inlet end at the lower part of the second air-air heat exchanger, and the fresh air is sent into an air-conditioning room; the return air passes through the first air-air heat exchanger and then continues to pass through the air-liquid heat exchanger to finish heat utilization, and then is discharged out of the room from the air exhaust end of the return air duct;
outdoor module wind return circuit: the third fan is arranged between the air inlet of the outdoor module and the second membrane-refrigerant coil composite assembly, outdoor air enters the unit from the air inlet of the outdoor module, and outdoor fresh air is exhausted from the air outlet of the outdoor module after flowing through the second membrane-refrigerant coil composite assembly;
a summer refrigerant circuit: flowing refrigerant from the second port of the electronic expansion valve to the refrigerant coil first port of the first membrane-refrigerant coil composite assembly; flowing refrigerant from the refrigerant coil second port of the first membrane-refrigerant coil composite assembly to the refrigerant tube first port of the indoor air heating chiller; a second port of a refrigerant pipeline of the indoor air heating cooler is connected with a four-way reversing valve of the outdoor module through a refrigerant pipeline and is connected to a refrigerant inlet end of the compressor through an inner pipeline of the four-way reversing valve; a refrigerant pipeline at the exhaust end of the compressor is connected to a first port of a refrigerant pipeline of the outdoor solution heating cooler after passing through an internal pipeline of the four-way reversing valve; flowing refrigerant from the refrigerant tube second port of the outdoor solution heating chiller to the refrigerant tube first port of the second membrane-refrigerant coil composite assembly; flowing refrigerant from the refrigerant conduit second port of the second membrane-refrigerant coil composite assembly to the first port of the electronic expansion valve;
a winter refrigerant circuit: the exhaust end of the compressor is connected to the second port of the refrigerant pipeline of the indoor air heating cooler after passing through the internal pipeline of the four-way reversing valve, and the air inlet end of the compressor is connected to the first port of the refrigerant pipeline of the outdoor solution heating cooler after passing through the internal pipeline of the four-way reversing valve; the refrigerant flows from the first port of the refrigerant pipeline of the second membrane-refrigerant coil composite assembly, then enters the electronic expansion valve from the second port, flows to the second port of the refrigerant pipeline of the second membrane-refrigerant coil composite assembly from the first port of the refrigerant pipeline of the first membrane-refrigerant coil composite assembly from the first port of the electronic expansion valve, flows to the second port of the refrigerant pipeline of the second membrane-refrigerant coil composite assembly from the first port of the refrigerant pipeline of the second membrane-refrigerant coil composite assembly, flows to the second port of the refrigerant pipeline of the outdoor solution heating cooler from the first port of the refrigerant pipeline of the second membrane-refrigerant coil composite assembly, and finally flows back to the air inlet end of the compressor from the first port of the refrigerant pipeline of the outdoor solution heating cooler through the internal pipeline of the four-way reversing valve;
a solution circulation loop: a solution inlet at the top of the first membrane-refrigerant coil composite assembly is connected to an outlet of the indoor solution pump through a solution pipeline, two solution outlets are arranged in a solution tank at the bottom of the first membrane-refrigerant coil composite assembly, and the first solution outlet is connected to an inlet of the indoor solution pump through a first indoor solution valve and a third indoor solution valve in sequence; a bottom solution second outlet of the first membrane-refrigerant coil composite assembly is connected to a first port of the liquid-liquid heat exchanger through a second indoor solution valve; a fourth port of the liquid-liquid heat exchanger is connected to the connecting pipeline of the first indoor solution valve and the third indoor solution valve through solution pipelines; a solution inlet at the top of the second membrane-refrigerant coil composite assembly is connected with a solution pipeline outlet of the outdoor solution heating cooler, a solution pipeline inlet of the outdoor solution heating cooler is connected to an outlet of the outdoor solution pump, two solution outlets are arranged in a solution tank at the bottom of the second membrane-refrigerant coil composite assembly, and a first solution outlet of the second membrane-refrigerant coil composite assembly is connected to an inlet of the outdoor solution pump sequentially through the first outdoor solution valve and the third outdoor solution valve; a second solution outlet at the bottom of the second membrane-refrigerant coil composite assembly is connected to a solution inlet of the air-liquid heat exchanger through a second outdoor solution valve; the solution outlet of the air-liquid heat exchanger is connected to the second port of the liquid-liquid heat exchanger; and a third port of the liquid-liquid heat exchanger is connected to the first outdoor solution valve and the third outdoor solution valve connecting pipeline through solution pipelines, a second port and a fourth port of the liquid-liquid heat exchanger are communicated, and a first port in the liquid-liquid heat exchanger is communicated with the third port.
The first membrane-refrigerant coil composite assembly and the second membrane-refrigerant coil composite assembly are identical in structural design and comprise a plurality of selectively permeable membranes, plastic supporting bodies of the selectively permeable membranes, refrigerant coils and solution liquid distribution pipes, the selectively permeable membranes are of square hollow structures, membrane materials which only allow water molecules to pass through are adopted and are vertically fixed on the plastic supporting bodies, the plurality of selectively permeable membranes are arranged in the composite assembly in parallel at intervals, and gaps between adjacent membrane structures are air flow channels; the solution distributing pipe is arranged above each selective permeable membrane, the dehumidifying solution flows into the membrane body of each selective permeable membrane from the solution distributing pipe, the solution in the membrane body vertically flows from top to bottom, and the solution flows into the solution tank at the bottom from the solution outlet and collecting pipe communicated with the lower part of each selective permeable membrane; the refrigerant coil is serpentine in the air flow path between the parallel permselective membranes.
The first membrane-refrigerant coil composite assembly is used as a dehumidification and evaporator in a summer operating mode and as a solution regeneration and condenser in a winter operating mode; the second membrane-refrigerant coil composite assembly functions as a solution regeneration and condenser in the summer operating mode and as a dehumidification and evaporator in the winter operating mode.
The solution used by the solution circulation loop is a calcium chloride solution, or a mixed solution of calcium chloride and lithium chloride which takes the calcium chloride solution as a main body, wherein the calcium chloride solution accounts for more than 70%; or a mixed solution of calcium chloride and lithium bromide, which takes a calcium chloride solution as a main body, wherein the calcium chloride solution accounts for more than 70 percent.
The proportion of the solution flowing out of the first outlet of the first membrane-refrigerant coil composite component is 70 percent of the flowing-out solution of the whole first membrane-refrigerant coil composite component; the proportion of the solution flowing out of the first outlet of the second membrane-refrigerant coil composite component is 70 percent of the flowing out solution of the whole second membrane-refrigerant coil composite component.
The invention has the beneficial effects that: compared with the conventional solution dehumidification air conditioning unit, the household solution dehumidification air conditioning system realizes miniaturization, and the split design is convenient for the use in residential buildings; the system adopts a fresh air mode, and VOCs, bacteria, viruses, micro-particles and the like in the air supply are effectively filtered after being treated by the dehumidifying solution, so that the system has more excellent indoor environment purifying effect compared with the conventional household air conditioner; the solution dehumidification and the solution regeneration of the system are completed in the novel membrane-refrigerant coil composite assembly, and the solution dehumidification is not in direct contact with air under the action of the permselective membrane, so that the solution carrying problem in air supply and air exhaust is solved compared with a conventional solution dehumidification air-conditioning system; the heat and mass exchange efficiency of the solution and the air in the solution dehumidification and solution regeneration processes can be improved by releasing the cold quantity and the heat quantity in the refrigerant coil in the novel membrane-refrigerant coil composite assembly, so that the air treatment effect is enhanced compared with that of a conventional membrane solution dehumidification device, and the energy-saving efficiency of the whole system is obviously improved; the system can simultaneously realize the functions of refrigerating and dehumidifying in summer and heating and humidifying in winter, which are not possessed by the conventional solution dehumidifying air conditioner; when the air conditioning unit operates in a refrigeration and dehumidification mode in summer, the moisture load in the fresh air is borne by the dehumidification solution, and compared with a traditional mechanical dehumidification air conditioning unit, the cold source temperature is improved, and the energy-saving effect is obvious; when the system operates in a heating and humidifying mode in winter, the crystallization temperature of the dehumidifying solution is very low, the dehumidifying solution can reduce the dew point temperature of outdoor air, and the system can operate in a frostless manner under the condition of extremely low outdoor temperature, so that the system has a wider application range compared with a common air source heat pump unit.
Drawings
FIG. 1 is a schematic diagram of the summer operation mode of the household solution dehumidifying air-conditioning system according to the present invention;
FIG. 2 is a schematic view of the winter mode of the household solution dehumidifying air-conditioning system according to the present invention;
fig. 3 is a schematic diagram of the structure of the membrane-refrigerant coil composite assembly of the present invention.
Detailed Description
As shown in fig. 1 and 2, the system is mainly composed of a vapor compression heat pump cycle, a solution dehumidification and solution regeneration cycle, and is divided into an indoor module and an outdoor module. The indoor module is arranged in an air-conditioning room, and the suspended ceiling is installed; the outdoor module is arranged outside the air-conditioning room and fixed on a building wall, the indoor module is connected with the outdoor module through a refrigerant pipeline and a solution pipeline, channels are reserved for the refrigerant pipeline and the solution pipeline in the building wall, and air inlet and exhaust channels are reserved for the indoor module on the wall.
Two air channels of a fresh air processing air channel and a return air channel are arranged in the indoor module. In the fresh air processing air duct, a first fan 1, a first air-air heat exchanger 2, a first membrane-refrigerant coil composite component 3, a second air-air heat exchanger 4 and an indoor air heating cooler 5 are sequentially arranged from a fresh air inlet end to a room air supply end. The fresh air is processed by the first membrane-refrigerant coil composite assembly 3 and then enters the primary side heat exchange pipeline at the upper part of the second air-air heat exchanger 4, and then enters the indoor air heating cooler 5, the fresh air is processed by the indoor air heating cooler 5 and then enters the secondary heat exchange pipeline at the lower part of the second air-air heat exchanger 4, and the fresh air flowing out of the secondary heat exchange pipeline at the lower part of the second air-air heat exchanger 4 is finally sent to an air-conditioning room. The return air duct and the fresh air duct intersect at the first air-air heat exchanger 2, and the first air-air heat exchanger 2, the air-liquid heat exchanger 6 and the second fan 8 are arranged in the return air duct from the inlet end to the exhaust end in sequence. In addition, the solution circulation pipeline in the indoor module is also provided with a liquid-liquid heat exchanger 7, a first indoor solution valve 9, a second indoor solution valve 10, a third indoor solution valve 11 and an indoor solution pump 12.
The outdoor module is provided with a compressor 13, a four-way reversing valve 14, an electronic expansion valve 17, an outdoor solution heating cooler 15 and a second membrane-refrigerant coil composite assembly 16, and in addition, a third fan 22 is arranged between an air inlet of the outdoor module and the second membrane-refrigerant coil composite assembly 16. A first outdoor solution valve 18, a second outdoor solution valve 19, a third outdoor solution valve 20 and an outdoor solution pump 21 are also arranged on the solution circulating pipeline in the outdoor module.
A household solution dehumidification air-conditioning system has two operation methods of a summer operation mode and a winter operation mode, and can realize cooling dehumidification and heating humidification of fresh air, so that the indoor temperature and humidity are adjusted. The four-way reversing valve 14 arranged in the outdoor module in the system can change the flow direction of the circulating refrigerant of the whole heat pump by switching the internal pipelines, thereby realizing the switching of the operation modes of the system in summer and winter.
As shown in fig. 1, in the summer operation mode, an exhaust pipe of a compressor 13 is switched by an internal pipe of a four-way reversing valve 14 and then connected to a refrigerant pipe port 1 of an outdoor solution heating cooler 15, a refrigerant pipe port 2 of the outdoor solution heating cooler 15 is connected to a refrigerant pipe port 1 of a second film-refrigerant coil composite assembly 16, a refrigerant pipe port 2 of the second film-refrigerant coil composite assembly 16 is connected to a port 1 of an electronic expansion valve 17, a port 2 of the electronic expansion valve 17 is connected to a refrigerant pipe port 1 of a first film-refrigerant coil composite assembly 3 of an indoor module through a refrigerant pipe, a refrigerant pipe port 2 of the first film-refrigerant coil composite assembly 3 is connected to a refrigerant pipe port 1 of an indoor air heating cooler 5, and a refrigerant pipe port 2 of the air heating cooler 5 is connected back to a four-way of the outdoor module through a refrigerant pipe The reversing valve 14 is switched by an internal pipeline of the four-way reversing valve and then communicated with an air inlet pipeline of the compressor 13. When the air conditioner operates in a summer mode, outdoor fresh air is firstly subjected to primary cooling by indoor return air in the first air-air heat exchanger 2, is then dehumidified and cooled in the first film-refrigerant composite component 3, is then cooled by the indoor air heating cooler 5, is subjected to temperature control by the second air-air heat exchanger 4, and is then sent to an air-conditioning room.
As shown in fig. 2, in the winter operation mode, after the exhaust pipe of the compressor 13 is switched by the internal pipe of the four-way reversing valve 14, the exhaust pipe is connected to the refrigerant pipe port 2 of the indoor air heating cooler 5 of the indoor module through the refrigerant pipe, the refrigerant pipe port 1 of the indoor air heating cooler 5 is connected to the refrigerant pipe port 2 of the first membrane-refrigerant coil composite assembly 3, the refrigerant pipe port 1 of the first membrane-refrigerant coil composite assembly 3 is connected back to the port 2 of the electronic expansion valve 17 of the outdoor module through the refrigerant pipe, the port 1 of the electronic expansion valve 17 is connected to the refrigerant pipe port 2 of the second membrane-refrigerant coil composite assembly 16, the refrigerant pipe port 1 of the second membrane-refrigerant coil composite assembly 16 is connected to the refrigerant pipe port 2 of the outdoor solution heating cooler 15, the refrigerant pipeline port 1 of the outdoor solution heating cooler 15 is connected to the four-way reversing valve 14, and is communicated with the air inlet pipeline of the compressor 13 after being switched by the internal pipeline of the four-way reversing valve 13. During the operation in the winter mode, outdoor fresh air is firstly primarily heated by indoor return air in the first air-air heat exchanger 2, then is further heated and humidified in the first membrane-refrigerant composite component 3, and then is heated by the indoor air heating cooler 5, is subjected to temperature control by the second air-air heat exchanger 4 and is sent into an air-conditioning room.
The solution circulation pipeline connection mode of the household solution dehumidification air-conditioning system is the same in summer and winter operation modes. A solution inlet at the top of the first membrane-refrigerant coil composite component 3 is connected to an outlet of the indoor solution pump 12 through a solution pipeline, two solution outlets are arranged in a solution tank at the bottom of the first membrane-refrigerant coil composite component 3, and the solution outlet 1 is connected to an inlet of the indoor solution pump 12 through a first indoor solution valve 9 and a third indoor solution valve 11 in sequence; the bottom solution outlet 2 of the first membrane-refrigerant coil composite assembly 3 is connected to port 1 of the liquid-liquid heat exchanger 7 through a second indoor solution valve 10. The port 4 of the liquid-liquid heat exchanger 7 is connected to the connecting pipes of the first indoor solution valve 9 and the third indoor solution valve 11 through solution pipelines. A solution inlet at the top of the second membrane-refrigerant coil composite assembly 16 is connected with a solution pipeline outlet of the outdoor solution heating cooler 15, a solution pipeline inlet of the outdoor solution heating cooler 15 is connected to an outlet of the outdoor solution pump 21, two solution outlets are arranged in a solution tank at the bottom of the second membrane-refrigerant coil composite assembly 16, and the solution outlet 1 is connected to an inlet of the outdoor solution pump 21 sequentially through the first outdoor solution valve 18 and the third outdoor solution valve 20; the bottom solution outlet 2 of the second membrane-refrigerant coil composite assembly 16 is connected to the solution inlet of the air-to-liquid heat exchanger 6 through a second outdoor solution valve 19; the solution outlet of the air-liquid heat exchanger 6 is connected to the port 2 of the liquid-liquid heat exchanger 7. The port 3 of the liquid-liquid heat exchanger 7 is connected by solution lines to the connecting pipes of the first and third outdoor solution valves 18, 20.
The main structure of the membrane-refrigerant coil composite assembly shown in fig. 3 comprises a plurality of permselective membranes and their plastic supports, refrigerant coils and solution distribution tubes. The selective permeability membranes are of square hollow structures, membrane materials which only allow water molecules to pass through are adopted and vertically fixed on the plastic support body, the selective permeability membranes are arranged in the composite assembly side by side at the same interval, and gaps between adjacent membrane structures are air flow channels; the solution distributing pipe is arranged above each selective permeable membrane, the dehumidifying solution flows into the membrane body of each selective permeable membrane from the solution distributing pipe, the solution in the membrane body vertically flows from top to bottom, and the solution flows into the solution tank at the bottom from the solution outlet and collecting pipe communicated with the lower part of each selective permeable membrane; the refrigerant coil is serpentine in the air flow path between the parallel permselective membranes.
The first membrane-refrigerant coil composite component 3 in the household solution dehumidification air-conditioning system is used as a dehumidification and evaporator in a summer operation mode and is used as a solution regeneration and condenser in a winter operation mode; the second membrane-refrigerant coil composite assembly 16 functions as a solution regeneration and condenser during summer operating mode and as a dehumidification and evaporator during winter operating mode.
The solution used in the solution circulation used in the household solution dehumidification air-conditioning system is a calcium chloride solution, or a mixed solution of calcium chloride and lithium chloride (the calcium chloride solution accounts for more than 70%) and a mixed solution of calcium chloride and lithium bromide (the calcium chloride solution accounts for more than 70%) which mainly use the calcium chloride solution.
The operation scheme of the household solution dehumidification air-conditioning system in summer and the connection mode of the refrigerant and the solution pipeline are as follows:
the indoor module of the system mainly completes the heat and humidity treatment of fresh air and the heat utilization process of return air. Outdoor fresh air is sent into the indoor module from the inlet end of the fresh air processing air channel by the first fan 1; the indoor return air enters the indoor module from the inlet end of the return air duct under the action of the second fan 8. The fresh air and the return air exchange heat in the first air-air heat exchanger 2, and the temperature of the fresh air is preliminarily reduced; then fresh air enters the first membrane-refrigerant coil composite component 3, moisture in the fresh air in the component is absorbed by a dehumidifying solution in the selective permeable membrane, and meanwhile, cold energy released by the refrigerant coil is used for cooling the fresh air and counteracting heat generated in the dehumidifying process; the fresh air after being dehumidified and further cooled is sent into the primary air inlet end at the upper part of the second air-air heat exchanger 4, then the final cooling treatment is carried out in the indoor air heating cooler 5, the cooled fresh air enters the secondary air inlet end at the lower part of the second air-air heat exchanger 4, the fresh air is sent into an air-conditioning room after being reheated, the second air-air heat exchanger 4 is arranged to control the air supply temperature by using the air with higher temperature before being cooled by the indoor air heating cooler 5, and the temperature of the fresh air finally sent into the room can not be too low. The return air passes through the first air-air heat exchanger 2 and then continues to pass through the air-liquid heat exchanger 6 for cooling the regenerated hot solution, and finally the high-temperature return air is discharged out of the room from the air exhaust end of the return air duct. The first membrane-refrigerant coil composite component 3 is used for the solution dehumidification process, the indoor air heating cooler 5 is used for cooling fresh air, and the cold energy in the two devices is the evaporation cold energy of heat pump circulation.
Refrigerant flows from port 2 of the electronic expansion valve 17 to refrigerant coil port 1 of the first membrane-refrigerant coil composite assembly 3; refrigerant flows from the refrigerant coil port 2 of the first membrane-refrigerant coil composite assembly 3 to the refrigerant tube port 1 of the indoor air heating chiller. The refrigerant pipeline port 2 of the indoor air heating cooler 5 is connected with the four-way reversing valve 14 of the outdoor module through a refrigerant pipeline, and is connected to the refrigerant inlet end of the compressor 13 through the inner pipeline of the four-way reversing valve. A discharge end refrigerant pipeline of the compressor 13 is connected to a refrigerant pipeline port 1 of the outdoor solution heating cooler 15 after passing through an internal pipeline of the four-way reversing valve 14; refrigerant flows from refrigerant line port 2 of the outdoor solution heating chiller 15 to refrigerant line port 1 of the second membrane-refrigerant coil composite assembly 16; refrigerant flows from refrigerant line port 2 of the second membrane-refrigerant coil composite assembly 16 to port 1 of the electronic expansion valve 17. The above is the refrigerant pipeline connection mode and the refrigerant flow direction control of the system in the summer operation mode.
The outdoor module of the system completes the treatment of heat pump condensation heat and the regeneration process of the solution. Under the action of the third fan 22, outdoor air enters the unit from the air inlet of the outdoor module, when fresh outdoor air flows through the second membrane-refrigerant coil composite component 16, moisture in a dehumidification solution inside the selective permeable membrane in the second membrane-refrigerant coil composite component 16 is taken away, heat of condensation of a heat pump in a refrigerant coil in the second membrane-refrigerant coil composite component 16 is absorbed, and the high-temperature and high-humidity outdoor air is finally discharged from the air outlet of the outdoor module. The dehumidification solution entering the second membrane-refrigerant coil composite assembly 16 is a high-temperature solution heated by absorbing condensation heat in the outdoor solution heating cooler 15, and the water vapor partial pressure of the high-temperature solution is higher than that of outdoor air, so that the moisture in the solution can be absorbed by the outdoor air, the solution regeneration process can be completed, and the solution concentration can be recovered intentionally.
The solution circulation pipeline of the system is connected in a mode that: the dehumidifying solution enters the selective permeability membrane from a solution distribution pipe at the top of the first membrane-refrigerant coil composite component 3, and the top solution distribution pipe is connected with an outlet of the indoor solution pump 12; the dehumidified dilute solution flows out of a liquid collecting pipe at the bottom of the first membrane-refrigerant coil composite component 3 and then enters a solution tank, two solution outlets are formed in the solution tank, an outlet 1 is connected to an inlet of an indoor solution pump 12 through a solution pipeline, a first indoor solution valve 9 and a third indoor solution valve 11 are arranged on the section of pipeline, and a pipeline between the outlet 1 of the solution tank and a solution inlet at the top of the composite component 3 is a dehumidified solution self-circulation pipeline; the outlet 2 is connected to the port 1 of the liquid-liquid heat exchanger 7 through a solution pipeline, and a second indoor solution valve 10 is arranged on the pipeline; the flow of the solution from the outlet 1 and the outlet 2 is controlled by the first indoor solution valve 9 and the third indoor solution valve 11 respectively, wherein the proportion of the solution from the outlet 1 is 70% of the whole first membrane-refrigerant coil composite component. The regenerated solution enters the selective permeable membrane from a solution distribution pipe at the top of the second membrane-refrigerant coil composite component 16, wherein the solution distribution pipe at the top is connected with the solution pipeline outlet of the outdoor solution heating cooler 15, and the solution pipeline inlet of the outdoor solution heating cooler 15 is connected with the outlet of the outdoor solution pump 21; the solution tank at the bottom of the second membrane-refrigerant coil composite assembly is also provided with two outlets, the outlet 1 is connected to the inlet of an outdoor solution pump 21 through a solution pipeline, a first outdoor solution valve 18 and a third outdoor solution valve 20 are arranged on the pipeline, and a pipeline between the outlet 1 of the solution tank and the solution inlet at the top of the composite assembly 16 is a regenerated solution self-circulation pipeline; the outlet 2 is connected to the solution end inlet of the air-liquid heat exchanger 6 of the indoor module through a solution pipeline, and a second outdoor solution valve 19 is arranged on the pipeline; the flow of the solution from outlet 1 and outlet 2 is controlled by a first outdoor solution valve 18 and a third outdoor solution valve 20, respectively, wherein the proportion of the solution from outlet 1 is 70% of the total second membrane-refrigerant coil composite assembly. An outlet 2 at the bottom of the second membrane-refrigerant coil composite assembly 16 flows to the regeneration solution of the indoor module for concentration supplement of the dehumidification solution, an outlet at the solution end of the air-liquid heat exchanger 6 is connected to a port 2 of the liquid-liquid heat exchanger 7, the port 2 and the port 4 of the liquid-liquid heat exchanger 7 are communicated, the port 4 of the liquid-liquid heat exchanger 7 is connected to a solution connecting pipeline between the first indoor solution valve and the third indoor solution valve, and the regenerated concentrated solution is input into the dehumidification solution self-circulation from the outlet. In addition, a port 1 in the liquid-liquid heat exchanger 7 is communicated with a port 3, the port 3 is connected to a solution pipeline between a first outdoor solution valve 18 and a third outdoor solution valve 20 of the outdoor module, and a pipeline from an outlet 2 at the bottom of the first membrane-refrigerant coil composite component 3 to the port 1 in the liquid-liquid heat exchanger 7 is used for conveying the dehumidified dilute solution to a regeneration self-circulation mode. The indoor air-liquid heat exchanger 6 and the liquid-liquid heat exchanger 7 function to cool the regenerated concentrated solution to improve the efficiency of the solution dehumidification process in the first membrane-refrigerant coil composite assembly 3.
The winter operation scheme of the household solution dehumidification air-conditioning system and the connection mode of the refrigerant and the solution pipeline are as follows:
the indoor module of the system mainly completes the heating and humidifying of fresh air and the heat utilization process of return air. The fresh air and the return air exchange heat in the first air-air heat exchanger 2, and the fresh air is heated preliminarily; then fresh air enters the first membrane-refrigerant coil composite component 3, the fresh air absorbs moisture from the solution inside the selective permeable membrane in the first membrane-refrigerant coil composite component 3, the fresh air is humidified, meanwhile, heat released from the refrigerant coil in the first membrane-refrigerant coil composite component 3 is absorbed, and the temperature is further raised; the heated and humidified fresh air is sent into the primary air inlet end at the upper part of the second air-air heat exchanger 4, then the final temperature rise treatment is carried out in the indoor air heating cooler 5, the heated fresh air enters the secondary air inlet end at the lower part of the second air-air heat exchanger 4, the fresh air is sent into an air-conditioning room after being subjected to heat exchange with the primary air, and the second air-air heat exchanger 4 is arranged to control the air supply temperature by using the lower-temperature air before being heated by the indoor air heating cooler, so that the temperature of the fresh air finally sent into the room is not too high. The return air passes through the first air-air heat exchanger 2 and then continues to pass through the air-liquid heat exchanger 6 for heating cold solution input by the outdoor module, and finally the return air after heat utilization is discharged outdoors from the air exhaust end of the return air duct. The first membrane-refrigerant coil composite component 3 is used for the solution regeneration process, the indoor air heating cooler 5 is used for heating fresh air, and the heat in the two devices is the condensation heat of a heat pump cycle.
The refrigerant pipeline connection mode among all the components of the system in the winter operation mode is consistent with that in the summer operation mode, and the change of the refrigerant flow direction of the system is realized only by switching the internal pipelines of the four-way reversing valve 14. Wherein, the exhaust end of the compressor 13 is connected to the refrigerant pipeline port 2 of the indoor air heating cooler 5 after passing through the internal pipeline of the four-way reversing valve 14, and the intake end of the compressor 13 is connected to the refrigerant pipeline port 1 of the outdoor solution heating cooler 15 after passing through the internal pipeline of the four-way reversing valve 14; refrigerant flows from the exhaust end of the compressor 13 to the refrigerant pipe port 2 of the indoor air heating cooler 5, then flows from the refrigerant pipe port 1 of the indoor air heating cooler 5 to the refrigerant pipe port 2 of the first membrane-refrigerant coil composite assembly 3, flows out from the refrigerant pipe port 1 of the first membrane-refrigerant coil composite assembly 3, enters the electronic expansion valve 17 from the port 2, then flows from the port 1 of the electronic expansion valve 17 to the refrigerant pipe port 2 of the second membrane-refrigerant coil composite assembly 16, flows out from the refrigerant pipe port 1 of the second membrane-refrigerant coil composite assembly 16, enters the refrigerant pipe port 2 of the outdoor solution heating cooler 15, finally flows back to the intake end of the compressor 13 from the refrigerant pipe port 1 of the outdoor solution heating cooler 15 through the internal pipe of the four-way reversing valve 14, the whole heat pump cycle is completed.
The outdoor module of the system completes the absorption process of heat and moisture of outdoor air in the winter operation mode. Under the action of the third fan 22, outdoor air enters the unit from the air inlet of the outdoor module, when fresh outdoor air flows through the second membrane-refrigerant coil composite assembly 16, moisture and heat in the air are absorbed by the low-temperature dehumidification solution, and the low-temperature and low-humidity outdoor air is finally discharged from the air outlet of the outdoor module. The dehumidification solution entering the second membrane-refrigerant coil composite assembly 16 is a solution cooled by absorbing the evaporation cold in the outdoor solution heating cooler 15, and the water vapor partial pressure of the low-temperature solution is lower than that of the outdoor air, so that the solution can absorb the moisture and heat in the outdoor air, and the energy and the outdoor air are transferred into the system. The system has obvious frostless operation characteristic, and the outdoor air temperature is 5 below zerooC. The wet-cold condition with 80% relative humidity is taken as an example. At this time, the moisture content of the outdoor air was 2.0 g/kg, and the dew point temperature was-7.3oC, there is a significant risk of frost formation if the outdoor air in this state enters the heat pump evaporator directly. In the present system, where the second membrane-refrigerant coil composite assembly 16 is used as both an outdoor evaporator and a dehumidifier, moisture in the outdoor air entering the membrane assembly is absorbed by the dehumidifying solution, resulting in a substantial decrease in its dew point temperature (air temperature-5 deg.f)oC. Dew point temperature as low as-15.1 at moisture content of 1.0 g/kgoC) So that there is no risk of frost formation. The dehumidifying solution has the characteristics of strong moisture absorption capacity and non-crystallization under the low-temperature working condition (taking a commonly used LiCl solution as an example, the dehumidifying solution is at-10 DEG)oC. When the mass concentration is 0.3, the equivalent air moisture content is 0.68 g/kg, and the crystallization temperature is as low as-57.2oC) Is the basis of the design of the frostless operation scheme of the system in winter.
The solution circulation pipeline connection mode and the solution flow direction are consistent with those of the summer mode in the winter operation mode, the difference is that the solution regeneration process is completed in the first membrane-refrigerant coil composite assembly 3, the solution dehumidification process is completed in the second membrane-refrigerant coil composite assembly 16, the pipeline between the bottom outlet 1 of the first membrane-refrigerant coil composite assembly 3 and the top liquid distribution pipe inlet is a regeneration solution self-circulation pipeline, and the pipeline between the bottom outlet 1 of the second membrane-refrigerant coil composite assembly 16 and the top liquid distribution pipe inlet is a dehumidification solution self-circulation pipeline. In addition, the ratio of the solution flowing out of the bottom solution tank outlet 1 of the first membrane-refrigerant coil composite component 3 and the second membrane-refrigerant coil composite component 16 is 70%; the dehumidified dilute solution flows to the indoor module from an outlet 2 of the solution tank at the bottom of the second membrane-refrigerant coil composite assembly 16, and is input into the regeneration solution self-circulation from a port 4 of the liquid-liquid heat exchanger 7 to a solution pipeline between the first indoor solution valve 9 and the third indoor solution valve 11; the regenerated concentrated solution flows to the outdoor module from the outlet 2 of the solution tank at the bottom of the first membrane-refrigerant coil composite component 3, and is input into the self-circulation of the dehumidification solution from the port 3 of the liquid-liquid heat exchanger 7 to a solution pipeline between the first outdoor solution valve 18 and the third outdoor solution valve 20; the indoor air-liquid heat exchanger 6 and the liquid-liquid heat exchanger 7 are used for heating the outdoor dehumidified dilute solution so as to improve the efficiency of the solution regeneration process and the fresh air heating and humidifying process in the first membrane-refrigerant coil composite component 3.
Claims (5)
1. A household solution dehumidification air-conditioning system is characterized by comprising a steam compression type heat pump cycle, a solution dehumidification cycle and a solution regeneration cycle, and is divided into an indoor module and an outdoor module, wherein the indoor module is arranged in an air-conditioning room, and a suspended ceiling is installed; the outdoor module is arranged outside the air-conditioning room and fixed on a building wall, the indoor module is connected with the outdoor module through a refrigerant pipeline and a solution pipeline, and the building wall is provided with an air inlet channel and an air exhaust channel of the indoor module;
indoor module wind return circuit: two air channels of a fresh air processing air channel and a return air channel are arranged, outdoor fresh air is sent into the indoor module from the inlet end of the fresh air processing air channel by a first fan (1), the indoor return air enters the indoor module from the inlet end of the return air duct under the action of the second fan (8), the fresh air and the return air exchange heat in the first air-air heat exchanger (2), the fresh air from the first air-air heat exchanger (2) enters the first membrane-refrigerant coil composite component (3) for humidity exchange and heat exchange, the fresh air is sent into the primary air inlet end at the upper part of the second air-air heat exchanger (4), then enters the indoor air heating cooler (5) for heat treatment and is sent into the secondary air inlet end at the lower part of the second air-air heat exchanger (4), and the fresh air is sent into an air-conditioning room after heat exchange is carried out between the secondary air inlet end and the primary air inlet; the return air passes through the first air-air heat exchanger (2) and then continues to pass through the air-liquid heat exchanger (6) to finish heat utilization, and then is discharged out of the room from the air exhaust end of the return air duct;
outdoor module wind return circuit: the third fan (22) is arranged between the air inlet of the outdoor module and the second membrane-refrigerant coil composite assembly (16), outdoor air enters the unit from the air inlet of the outdoor module, and outdoor fresh air flows through the second membrane-refrigerant coil composite assembly and is discharged from the air outlet of the outdoor module;
a summer refrigerant circuit: the refrigerant flows from the second port of the electronic expansion valve (17) to the first port of the refrigerant coil of the first membrane-refrigerant coil composite assembly (3); refrigerant flows from the second port of the refrigerant coil of the first membrane-refrigerant coil composite assembly (3) to the first port of the refrigerant pipeline of the indoor air heating cooler (5); a second port of a refrigerant pipeline of the indoor air heating cooler (5) is connected with a four-way reversing valve (14) of the outdoor module through the refrigerant pipeline and is connected to a refrigerant inlet end of the compressor (13) through an inner pipeline of the four-way reversing valve; a refrigerant pipeline at the exhaust end of the compressor (13) passes through an internal pipeline of the four-way reversing valve (14) and then is connected to a first port of a refrigerant pipeline of the outdoor solution heating cooler (15); the refrigerant flows from the second port of the refrigerant pipeline of the outdoor solution heating cooler (15) to the first port of the refrigerant pipeline of the second membrane-refrigerant coil composite assembly (16); refrigerant flows from the second refrigerant conduit port of the second membrane-refrigerant coil composite assembly (16) to the first port of the electronic expansion valve (17);
a winter refrigerant circuit: the exhaust end of the compressor (13) is connected to the second port of the refrigerant pipeline of the indoor air heating cooler (5) after passing through the internal pipeline of the four-way reversing valve (14), and the air inlet end of the compressor (13) is connected to the first port of the refrigerant pipeline of the outdoor solution heating cooler (15) after passing through the internal pipeline of the four-way reversing valve (14); refrigerant flows from the exhaust end of the compressor (13) to the second port of the refrigerant pipeline of the indoor air heating cooler (5), then flows from the first port of the refrigerant pipeline of the indoor air heating cooler (5) to the second port of the refrigerant pipeline of the first membrane-refrigerant coil composite component (3), flows out from the first port of the refrigerant pipeline of the first membrane-refrigerant coil composite component (3) and enters the electronic expansion valve (17) from the second port, then flows from the first port of the electronic expansion valve (17) to the second port of the refrigerant pipeline of the second membrane-refrigerant coil composite component (16), and flows out from the first port of the refrigerant pipeline of the second membrane-refrigerant coil composite component (16) and enters the second port of the refrigerant pipeline of the outdoor solution heating cooler (15), finally, the refrigerant flows back to the air inlet end of the compressor (13) from the first port of the refrigerant pipeline of the outdoor solution heating cooler (15) through the internal pipeline of the four-way reversing valve (14);
a solution circulation loop: a top solution inlet of the first membrane-refrigerant coil composite assembly (3) is connected to an outlet of the indoor solution pump (12) through a solution pipeline, two solution outlets are arranged in a solution tank at the bottom of the first membrane-refrigerant coil composite assembly (3), and the first solution outlet is connected to an inlet of the indoor solution pump (12) through a first indoor solution valve (9) and a third indoor solution valve (11) in sequence; the second outlet of the bottom solution of the first membrane-refrigerant coil composite component (3) is connected to the first port of the liquid-liquid heat exchanger (7) through a second indoor solution valve (10); a fourth port of the liquid-liquid heat exchanger (7) is connected to a connecting pipeline of the first indoor solution valve (9) and the third indoor solution valve (11) through solution pipelines; a solution inlet at the top of the second membrane-refrigerant coil composite assembly (16) is connected with a solution pipeline outlet of the outdoor solution heating cooler (15), a solution pipeline inlet of the outdoor solution heating cooler (15) is connected to an outlet of the outdoor solution pump (21), two solution outlets are arranged in a solution tank at the bottom of the second membrane-refrigerant coil composite assembly (16), and a first solution outlet of the second membrane-refrigerant coil composite assembly (16) is connected to an inlet of the outdoor solution pump (21) sequentially through the first outdoor solution valve (18) and the third outdoor solution valve (20); the bottom second solution outlet of the second membrane-refrigerant coil composite assembly (16) is connected to the solution inlet of the air-liquid heat exchanger (6) through a second outdoor solution valve (19); the solution outlet of the air-liquid heat exchanger (6) is connected to the second port of the liquid-liquid heat exchanger (7); and a third port of the liquid-liquid heat exchanger (7) is connected to a connecting pipeline of the first outdoor solution valve (18) and the third outdoor solution valve (20) through a solution pipeline, a second port and a fourth port of the liquid-liquid heat exchanger (7) are communicated, and a first port in the liquid-liquid heat exchanger (7) is communicated with the third port.
2. The household solution dehumidification air-conditioning system according to claim 1, wherein the first membrane-refrigerant coil composite assembly (3) and the second membrane-refrigerant coil composite assembly (16) are identical in structural design and comprise a plurality of selectively permeable membranes and plastic supporting bodies thereof, refrigerant coils and solution distribution pipes, the selectively permeable membranes are square hollow structures, membrane materials only allowing water molecules to penetrate through are adopted and vertically fixed on the plastic supporting bodies, the plurality of selectively permeable membranes are arranged in the composite assemblies side by side at intervals, and gaps between adjacent membrane structures are air flow passages; the solution distributing pipe is arranged above each selective permeable membrane, the dehumidifying solution flows into the membrane body of each selective permeable membrane from the solution distributing pipe, the solution in the membrane body vertically flows from top to bottom, and the solution flows into the solution tank at the bottom from the solution outlet and collecting pipe communicated with the lower part of each selective permeable membrane; the refrigerant coil is serpentine in the air flow path between the parallel permselective membranes.
3. Household solution dehumidifying air-conditioning system according to claim 1 or 2, wherein the first membrane-refrigerant coil composite assembly (3) is used as a dehumidification and evaporator in a summer operation mode and as a solution regeneration and condenser in a winter operation mode; the second membrane-refrigerant coil composite assembly (16) functions as a solution regeneration and condenser during summer operating modes and as a dehumidification and evaporator during winter operating modes.
4. The household solution dehumidification air-conditioning system as claimed in claim 3, wherein the solution used in the solution circulation loop is a calcium chloride solution, or a mixed solution of calcium chloride and lithium chloride mainly containing the calcium chloride solution, wherein the calcium chloride solution accounts for more than 70%; or a mixed solution of calcium chloride and lithium bromide, which takes a calcium chloride solution as a main body, wherein the calcium chloride solution accounts for more than 70 percent.
5. The household solution dehumidification air-conditioning system according to claim 4, wherein the first outlet of the first membrane-refrigerant coil composite assembly (3) discharges 70% of the solution of the whole first membrane-refrigerant coil composite assembly (3); the proportion of the solution flowing out of the first outlet of the second membrane-refrigerant coil composite component (16) is 70 percent of the flowing out solution of the whole second membrane-refrigerant coil composite component (16).
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| CN110319616B (en) * | 2019-06-26 | 2021-03-05 | 上海理工大学 | Frostless type gas heat pump system |
| CN111031753B (en) * | 2019-12-12 | 2021-12-17 | 优刻得科技股份有限公司 | Fresh air unit and air conditioning system |
| CN112944712B (en) * | 2021-02-01 | 2023-09-05 | 青岛海信日立空调系统有限公司 | Heat pump system and control method |
| CN114017855B (en) * | 2021-09-29 | 2023-03-03 | 东南大学 | Heat pump comprehensive utilization solution dehumidification fresh air system for swimming pool building |
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