CN108006940B - Refrigeration heat exchange equipment and air conditioner with same - Google Patents
Refrigeration heat exchange equipment and air conditioner with same Download PDFInfo
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- CN108006940B CN108006940B CN201610928097.1A CN201610928097A CN108006940B CN 108006940 B CN108006940 B CN 108006940B CN 201610928097 A CN201610928097 A CN 201610928097A CN 108006940 B CN108006940 B CN 108006940B
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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
- F24F13/30—Arrangement or mounting of heat-exchangers
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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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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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
- F25B39/00—Evaporators; Condensers
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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
- F25B41/40—Fluid line arrangements
Abstract
The invention provides refrigeration and heat exchange equipment, which comprises a first heat transfer loop and a second heat transfer loop, wherein a refrigerant flows in the first heat transfer loop, and a hygroscopic solution flows in the second heat transfer loop; the heat exchanger also at least comprises a first heat exchange area, a second heat exchange area and a third heat exchange area; the refrigerant flowing in the first heat transfer loop and the hygroscopic solution flowing in the second heat transfer loop exchange heat in the first heat exchange area, the refrigerant after heat exchange flows into the second heat exchange area to exchange heat with the air medium, and the hygroscopic solution in the second heat transfer loop exchanges heat with the air medium in the third heat exchange area. An air conditioner is also disclosed. The refrigeration heat exchange equipment disclosed by the invention can ensure that when the small air conditioner using a liquid dehumidification mode is used in a high-temperature and high-humidity state, the sensible heat discharged by the compressor can exchange heat in a gas-liquid heat exchange mode, so that the air conditioner realizes dehumidification-regeneration circulation on the premise of not adding an external heating source and has higher heat exchange efficiency.
Description
Technical Field
The invention relates to the field of air conditioning, in particular to refrigeration heat exchange equipment suitable for high-temperature and high-humidity areas and an air conditioner with the refrigeration heat exchange equipment.
Background
In high temperature and high humidity areas such as southeast Asia, high humidity is a major factor that restricts the development of air conditioners. In the air conditioning equipment common in the prior art, air dehumidification is performed by three common devices. The first is a freeze dehumidifier. Namely, the air is dehumidified by utilizing the cooling and dehumidifying capacity of an evaporator of a refrigerating machine system, and the air is cooled and dehumidified by the evaporator and then is subjected to wet heating by a condenser and the like. The specific enthalpy of the outlet air is greater than that of the inlet air, and the added heat, namely the electricity consumption equivalent of the compressor, can be easily understood. The dehumidification mode has reliable operation and the dehumidification amount can reach 20 kg/h. The second type is a rotating wheel dehumidification device, so that high-humidity air is in contact with lithium chloride crystals in the rotating wheel, the rotating wheel is cooled by the air, the crystalline lithium chloride with low water vapor partial pressure absorbs moisture in the air, and the air is dehumidified. The third is a liquid moisture absorption device which mainly comprises a moisture absorption tower and a regeneration tower. In the moisture absorption tower, the moisture absorption surface has low water vapor partial pressure, so that wet air is absorbed by moisture when passing through the moisture absorbent solution spraying device, and the diluted moisture absorbent solution is sprayed, heated and concentrated in the regeneration tower to be regenerated. In the moisture absorption tower, in order to deal with the latent heat released during the condensation of water vapor, the solution is cooled by a cooling coil, and cold water, underground water or circulating water for cooling can be introduced into the cooling coil, and the water temperature is 8 to 10 ℃ lower than the solution temperature. The regeneration increasing pipe is internally communicated with steam, so a heat source is also needed in summer, see page 594 of the handbook of practical refrigeration and air conditioning engineering.
By contrast, the first refrigeration and dehumidification device, whose dehumidification effect depends mainly on the performance of the compressor itself, has acceptable investment cost for the compressor for the region with humidity of 60% to 80%, but has higher equipment cost and operation cost for the region with humidity higher than 80% throughout the year and air temperature higher than 30 ℃. For the second rotary-wheel dehumidification device and the third liquid dehumidification device, the equipment is numerous and complex, the initial investment is huge, and meanwhile, a heat source matched with the equipment is required to be prepared, so that the equipment cannot be used in a household environment or a small-area refrigeration space basically. Moreover, when liquid dehumidification or solid dehumidification is adopted, particularly when liquid dehumidification is adopted, extra heating coils must be arranged in pipelines for refrigerant or moisture absorbent, dehumidification heat exchange is realized through frequent multiple heat exchange with the heating coils, and meanwhile, the size of a household air conditioner is limited, and refrigeration heat exchange equipment suitable for liquid dehumidification or solid dehumidification is not disclosed in the prior art.
In summary, there is a lack in the prior art of a refrigeration heat exchange device that can be applied to a household or small-area refrigeration space and meet the requirement for dehumidification and refrigeration in a high-temperature and high-humidity area.
Disclosure of Invention
The invention provides a refrigeration and heat exchange device which can be used in a household or small-area refrigeration space with low high temperature and high humidity.
The invention provides refrigeration and heat exchange equipment, which comprises a first heat transfer loop and a second heat transfer loop, wherein a refrigerant flows in the first heat transfer loop, and a hygroscopic solution flows in the second heat transfer loop; the heat exchanger also at least comprises a first heat exchange area, a second heat exchange area and a third heat exchange area; the refrigerant flowing in the first heat transfer loop and the hygroscopic solution flowing in the second heat transfer loop exchange heat in the first heat exchange area, the refrigerant after heat exchange flows into the second heat exchange area to exchange heat with the air medium, and the hygroscopic solution in the second heat transfer loop exchanges heat with the air medium in the third heat exchange area.
The first heat exchange area comprises two heat exchange tubes which are connected in a sleeved mode, a refrigerant discharged from an exhaust port of a compressor flows in one heat exchange tube, and a moisture absorption solution before regeneration flows in the other heat exchange tube; the second heat exchange area is a finned tube heat exchanger, and the third heat exchange area is a finned tube heat exchanger; the regenerated hygroscopic solution is heat-exchanged with the air medium in the third heat exchange zone.
In order to avoid the influence on the heat transfer efficiency caused by the sheet metal part with the uneven surface used in the refrigeration heat exchange equipment, the first heat exchange area is arranged at the bottom of the refrigeration heat exchange equipment.
The refrigeration heat exchange equipment disclosed by the invention can ensure that when the small air conditioning equipment using liquid dehumidification is used in a high-temperature and high-humidity state, sensible heat exhausted by the exhaust port of the compressor can exchange heat in a gas-liquid heat exchange mode, and compared with the gas-gas heat exchange mode, the refrigeration heat exchange equipment has a higher average heat exchange coefficient, so that a moisture absorption solution can form a dehumidification-regeneration cycle under the condition of not adding any external heating source or heater. Meanwhile, compared with the traditional finned condenser, the refrigeration heat exchange equipment disclosed by the invention can reduce the heat exchange area, and can obviously improve the utilization efficiency of sensible heat in the exhaust of the exhaust port of the compressor under the conditions of the same compressor discharge capacity and the same ambient temperature. Because the gas-liquid heat exchange at the bottom does not depend on an air medium, the working performance of the equipment is not influenced even if the surface of the sheet metal part at the bottom is not smooth.
The invention also discloses an air conditioner, which comprises refrigeration heat exchange equipment, wherein the refrigeration heat exchange equipment comprises a first heat transfer loop and a second heat transfer loop, wherein a refrigerant flows in the first heat transfer loop, and a moisture absorption solution flows in the second heat transfer loop; the heat exchanger also at least comprises a first heat exchange area, a second heat exchange area and a third heat exchange area; the refrigerant flowing in the first heat transfer loop and the hygroscopic solution flowing in the second heat transfer loop exchange heat in the first heat exchange area, the refrigerant after heat exchange flows into the second heat exchange area to exchange heat with an air medium, and the hygroscopic solution in the second heat transfer loop exchanges heat with the air medium in the third heat exchange area; further comprising a first fluid circuit and a second fluid circuit, wherein the first heat transfer circuit is disposed in the first fluid circuit and the second heat transfer circuit is disposed in the second fluid circuit; the second fluid circuit comprises a dehumidification module and a regeneration module, and the moisture absorption solution flows into the dehumidification module or the regeneration module after exchanging heat with the refrigerant in the first fluid circuit and/or the moisture absorption solution and/or the air medium in the second fluid circuit.
Further, the air conditioner includes a first casing provided in a first heat transfer area; the refrigeration heat exchange equipment and the regeneration module are arranged in the first shell.
Further, the air conditioner also comprises a second shell, and the second shell is arranged in a second heat transfer area; the dehumidification module is arranged in the second shell; in the second housing, a heat exchange device exchanges heat with the air medium in the second heat transfer area, and the hygroscopic solution in the dehumidification module exchanges heat with the refrigerant in the heat exchange device and the air medium in the second heat transfer area.
Still further, a first heat exchange tube section and a second heat exchange tube section; the first heat exchange tube section is arranged in the second fluid loop, and the hygroscopic solution flowing out of the dehumidification module exchanges heat with the hygroscopic solution in the first heat exchange tube section to reach a first temperature T1(ii) a The second heat exchange tube section comprises a part of a first fluid loop and a part of a second fluid loop, and the first fluid loop and the second fluid loop are coupled and absorbed at the second heat exchange tube sectionThe wet solution exchanges heat with the refrigerant in the second heat exchange tube section to a second temperature T2(ii) a Having a second temperature T2Flows in the second heat transfer circuit and exchanges heat with the refrigerant discharged from the compressor flowing in the first heat transfer circuit to a third temperature T3Post-inflow regeneration module, and has a second temperature T2The refrigerant after heat exchange of the hygroscopic solution flows into a second heat exchange area to exchange heat with an air medium; wherein T is3＞T2＞T1，T3The regeneration temperature of the hygroscopic solution.
Still further, a fourth heat exchange tube section is included; the fourth heat exchange tube segment comprising a portion of a first fluid circuit and a portion of a second fluid circuit, the first and second fluid circuits being coupled at the fourth heat exchange tube segment; the hygroscopic solution flowing out of the regeneration module exchanges heat with the hygroscopic solution in the first heat exchange tube section to a fourth temperature T4(ii) a The hygroscopic solution having the fourth temperature T4 is heat-exchanged with the air medium to the fifth temperature T in the third heat-exchanging zone5And exchanges heat with the refrigerant in the fourth heat exchange pipe section to a sixth temperature T6Post-inflow dehumidification module, wherein T4＞T5＞T6，T6The dehumidification temperature of the hygroscopic solution.
Preferably, the regeneration temperature is 60 to 80 ℃; the exhaust temperature of the compressor is 70 to 80 ℃; the hygroscopic solution is one of water-calcium chloride, water-lithium chloride or water-lithium bromide.
Preferably, the regeneration module comprises a liquid inlet pipe, a liquid distribution pipe, regeneration filler, a liquid collector and a liquid outlet pipe; the liquid inlet pipe is arranged on the upper side of the regeneration module, and the liquid outlet pipe is arranged on the lower side of the regeneration module so as to improve the contact area between the moisture absorption solution and the regeneration filler and enable the moisture absorption solution to be uniformly contacted with the regeneration filler.
The air conditioner disclosed by the invention realizes energy transfer through the refrigeration heat exchange equipment and the first fluid loop and the second fluid loop which are partially coupled, drives the moisture absorption solution to flow in the second fluid loop, and further realizes dehumidification and regeneration in the dehumidification module and the regeneration module. The air conditioner does not need additional heating coils and cooling devices, the evaporator does not need to bear a dehumidification function in a refrigeration cycle, the evaporation temperature can be increased to be higher than the dew point temperature of air, and the purpose of improving the energy efficiency is achieved. And further ensures that the evaporator works in a dry condition and does not generate condensed water, so that the sanitary condition of the indoor unit can be improved. Through tests, the energy efficiency of the air conditioner can be improved by at least more than 10%, and meanwhile, a conventional compressor is used in the air conditioner, so that the use cost of the split type small air conditioner in a high-temperature and high-humidity area is greatly reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of an embodiment of an air conditioner according to the present disclosure;
FIG. 2 is a schematic cross-sectional view of a refrigeration heat exchanger used in a second embodiment of the air conditioner disclosed in the present invention;
FIG. 3 is a cross-sectional view of one embodiment of the first housing of the air conditioner of FIG. 1;
fig. 4 is a schematic structural diagram of a regeneration module in the air conditioner shown in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic diagram of an embodiment of an air conditioner disclosed in the present invention. The air conditioner disclosed in this embodiment is, in particular, a distributed system, and is applied to a refrigerating space with a small heat load. For the use needs of buildings and the like, air treatment of each room is realized by a plurality of air conditioners. Completely different from the prior art, the air conditioner disclosed in the embodiment is mainly applied to regions with high temperature and high humidity, such as southeast asia, in the regions, the relative air humidity is more than 80% and the air temperature is higher than 30 ℃ in most of the year, the indoor heat and humidity load of the regions is high, and a common full air system, a full water system or an air-water system cannot meet the actual use requirement, especially the small power and small size requirements of a household air conditioner. In order to solve the above problem, in the present embodiment, the air conditioner is a coupled system of an air-refrigerant-hygroscopic solution flow path. As shown, the air conditioner includes a first fluid circuit F1 and a second fluid circuit F2, the first fluid circuit F1 and the second fluid circuit F2 being routed between a first heat transfer region S1 and a second heat transfer region S2. Refrigerant flows in the first fluid circuit F1, and a hygroscopic solution flows in the second fluid circuit F2. The refrigerant is subjected to phase change in the heat transfer areas, releases sensible heat and latent heat in the flowing process and simultaneously exchanges heat with an air medium, and the energy is used for cooling one of the heat transfer areas, enabling the heat transfer area to have a uniform temperature field and a uniform velocity field through air supply and being used as a heat source for driving the energy change and flowing of the hygroscopic solution. Under the driving of the energy change of the refrigerant, the hygroscopic solution also generates energy change in the flowing process, and the difference between the vapor pressure and the water vapor partial pressure of the hygroscopic solution is utilized to lead the water vapor in one heat transfer area to be taken away by the hygroscopic solution, thereby reducing the relative humidity in the heat transfer area.
As shown in fig. 1, the first fluid circuit F1 includes a first heat exchange device 11 and a second heat exchange device 12, with refrigerant exchanging heat in an air medium in the first heat exchange device 11 and the second heat exchange device 12. The second fluid circuit F2 includes a dehumidification module 22 and a regeneration module 21, and the hygroscopic solution flows into the dehumidification module 22 or the regeneration module 21 after exchanging heat with the refrigerant in the first fluid circuit F1 and/or the hygroscopic solution in the second fluid circuit F2 in the second fluid circuit F2. A portion of the first fluid circuit F1 and a portion of the second fluid circuit F2 are coupled to each other. The term "coupled" as defined in the present embodiment specifically means that energy is mutually transmitted in at least a part of the first fluid circuit F1 and a part of the second fluid circuit F2, so as to enable the hygroscopic solution to flow under the driving of energy change of the refrigerant and reduce the relative humidity in the heat transfer region by utilizing the pressure difference between the saturated vapor pressure and the water vapor partial pressure of the hygroscopic solution.
The loop consisting of the first fluid circuit F1, the first heat exchange device 11, the second heat exchange device 12, the compressor 13, the throttling device 15, the four-way reversing valve 14 is substantially identical to a conventional refrigeration cycle, as seen only from the piping connections themselves. The outdoor side is defined as a first heat transfer area S1, the air conditioning room is defined as a second heat transfer area S2, and in the cooling and dehumidifying mode, the first heat exchange device 11 is a condenser 11, and the second heat exchange device 12 is an evaporator 12. In view of the fact that both cooling and dehumidifying functions are realized by one set of system, the first shell 5 on the outdoor side forms the first coupling pipe section of the first fluid circuit F1 and the second fluid circuit F2, i.e. the first energy exchange point. Specifically, the first casing 5 is provided on the outdoor side, the condenser 11 is provided in the first casing 5, the regeneration module 21 and the first fan 31 are further provided, the high-temperature and high-pressure refrigerant superheated vapor discharged from the compressor 13 is cooled to liquid by the condenser 11 in the first casing 5, and the heat released from the refrigerant in the condenser 11 is taken away by the air on the outdoor side by the first fan 31 and exchanges heat with the air medium on the outdoor side. Since the regeneration module 21 is also disposed in the first housing 5 in an open state, in the present embodiment, the high-temperature, high-pressure superheated vapor of the refrigerant discharged from the compressor 13 flows from the outlet of the compressor 13 to the condenser 11, and the heat released during the condensation process of the condenser 11 is not completely taken away by the air medium outside the room, but a part of the energy exchanges heat with the moisture absorption solution in the second fluid circuit F2 to form a high-temperature dilute solution, and then the high-temperature dilute solution is introduced into the open regeneration module 21. The air medium at the outdoor side is also heat-exchanged during the condensation of the refrigerant, but the moisture content in the air medium is not changed, and the relative humidity of the air is lowered due to the temperature increase. Therefore, the saturated vapor pressure of the hygroscopic solution with high temperature and low concentration in the regeneration module 21 is higher than the water vapor partial pressure of the air outside the room, the water vapor in the hygroscopic solution with high temperature and low concentration in the regeneration module 21 can be carried away by the air medium with high temperature outside the room, and the concentration of the hygroscopic solution in the regeneration module 21 is improved to be regenerated.
Correspondingly, the second housing on the indoor side forms the second coupling pipe section of the first fluid circuit F1 and the second fluid circuit F2. The second housing has an evaporator 12 disposed therein and a dehumidification module 22 disposed therein. In the second shell, the liquid refrigerant returns to the evaporator 12 through the first fluid circuit F1, and the liquid refrigerant is evaporated and boiled at low pressure, transformed into vapor and absorbs heat of the air medium in the air-conditioned room, and exchanges heat with the air medium in the air-conditioned room by the second fan 32. Since the dehumidifying module 22 is also provided in the second housing in an open state. Therefore, in the present embodiment, the heat absorbed by the evaporator 12 is not completely from the air medium in the air-conditioned room, but also from the moisture absorption solution in the dehumidification module 22, and the moisture absorption solution in the dehumidification module 22 after heat exchange is a low-temperature high-concentration moisture absorption solution. The low-temperature and high-concentration moisture absorption solution has low surface saturated vapor pressure, water vapor in the air at the indoor side can be taken away by the low-temperature and high-concentration moisture absorption solution, the concentration of the moisture absorption solution in the dehumidification module 22 is reduced, and indoor dehumidification is realized while refrigeration is carried out.
The coupling between the first fluid circuit F1 and the second fluid circuit F2 is not limited to the coupling in the first casing 5 and the second casing. Since no additional heat source is provided in the system, the temperature adjustment of the hygroscopic solution also needs to be achieved by heat exchange at the coupling of the first fluid circuit F1 and the second fluid circuit F2. Specifically, the air conditioning system includes a first heat exchange tube section 41, a second heat exchange tube section 42, and a third heat exchange tube section 43. Wherein the first heat exchangeThe tube section 41 is arranged in the second fluid circuit F2, the hygroscopic solution flowing out of the dehumidification module 22 first exchanges heat with the hygroscopic solution in the first heat exchange tube section 41, and the low-temperature and reduced-concentration hygroscopic solution flowing out of the dehumidification module 22 is heated to the first temperature T1. The second heat exchange tube section 42 comprises a portion of a first fluid circuit F1 and a portion of a second fluid circuit F2, the first fluid circuit F1 and the second fluid circuit F2 being coupled, i.e. heat exchanged, at the second heat exchange tube section 42, having a first temperature T1Is heated to a second temperature T in heat exchange relationship with the refrigerant in a second heat exchange tube section 422. The refrigerant flowing in the second heat exchange tube section 42 comes from the high-temperature refrigerant at the outlet of the condenser 11, and the heat exchange in the second heat exchange tube section 42 can increase the temperature of the hygroscopic solution on one hand and can also supercool the refrigerant on the other hand. The third heat exchange tube section 43 includes a portion of the first fluid circuit F1 and a portion of the second fluid circuit F2, the first fluid circuit F1 and the second fluid circuit F2 also being coupled at the third heat exchange tube section 43, having a second temperature T2Is heated to a third temperature T in the third heat exchange tube section 43 in heat exchange relationship with the refrigerant3. The third heat exchange tube section 43 is disposed at the compressor discharge port 131, and the refrigerant flowing in the third heat exchange tube section 43 comes from the high temperature refrigerant vapor at the outlet of the compressor 13 to raise the temperature of the hygroscopic solution to the regeneration temperature, i.e., T3，T3＞T2＞T1. Through the process, the temperature of the moisture absorption solution is increased to the regeneration temperature under the condition of not increasing a heating source. In this embodiment, the hygroscopic solution may be any one of water-calcium chloride, water-lithium chloride, and water-lithium bromide, and the regeneration temperature thereof varies between 60 ℃ and 80 ℃ according to different working conditions, while the discharge temperature of the compressor 13 is 70 ℃ to 80 ℃, so that during the stable operation of the air conditioner, both refrigeration and regeneration have a stable heat source.
From the dehumidifying module 22 to the regenerating module 21, the temperature of the hygroscopic solution is gradually increased, and correspondingly, from the regenerating module 21 to the dehumidifying module 22, the temperature of the hygroscopic solution is gradually decreased. In particular, fromThe regenerated high-temperature and high-concentration hygroscopic solution flowing out of the regeneration module 21 returns to the first heat exchange tube section 41, exchanges heat with the low-temperature and low-concentration hygroscopic solution flowing to the regeneration module 21 in the first heat exchange tube section 41, and the hygroscopic solution exchanges heat to a fourth temperature T4. Having a fourth temperature T4Is passed into a condenser 11, having a fourth temperature T4The hygroscopic solution exchanges heat with the air medium at the outdoor side, and the temperature is reduced to a fifth temperature T5. Fifth temperature T5Above the temperature of the air medium. Also included in the air conditioner is a fourth heat exchange tube section 44, the fourth heat exchange tube section 44 including a portion of a first fluid circuit F1 and a portion of a second fluid circuit F2, the first and second fluid circuits F1 and F2 being coupled at the fourth heat exchange tube section 44, the refrigerant flowing in the fourth heat exchange tube section 44 being gaseous refrigerant at the inlet end of the compressor 13 having a fifth temperature T5Is heat exchanged to a sixth temperature T at a fourth heat exchange tube section 446And then flows into the dehumidification module 22 to dehumidify the room at a low temperature and a high concentration. Wherein T is4＞T5＞T6，T6The dehumidifying temperature of the hygroscopic solution, i.e., the operating temperature in the hygroscopic state.
The air conditioner disclosed by the invention can be a split type wall-mounted air conditioner or a split type cabinet air conditioner. The first heat exchange pipe section 41, the second heat exchange pipe section 42, the third heat exchange pipe section 43 and the fourth heat exchange pipe section 44, which are coupled by the first fluid loop F1 and the second fluid loop F2, in the air conditioner are made of heat transfer pipes, which can be selected according to the types of refrigerant and hygroscopic solution, such as seamless steel pipes, threaded pipes, cross-threaded pipes, sleeves and the like, and the pipe diameter is selected according to the national standard and the heat transfer coefficient. But also heat transfer circuits integrated in existing convective heat exchange devices. The first heat exchange device 11 and the second heat exchange device 12 may alternatively be fin heat exchangers. In order to make the hygroscopic solution in the second fluid circuit F2 flow, a dilute solution pump 45 and a concentrated solution pump 46 are further arranged in the second fluid circuit F2, the dilute solution pump 45 and the concentrated solution pump 46 are driven by electric energy, and the heat generated by the friction of the hygroscopic solution is very small by the dilute solution pump 45 and the concentrated solution pump 46, which can be ignored and not considered in the air conditioner. The first, second, third and fourth heat exchange tube sections 41, 42, 43, 44 are the preferred arrangement of heat exchange circuits. For special application or for areas with special requirements on heat transfer efficiency, heat transfer pipe sections coupled with the first fluid loop F1 and the second fluid loop F2 can be added according to use requirements, or heat exchange equipment with similar heat transfer and heat exchange effects can be realized.
The finned heat exchangers are selected as the first heat exchange device 11 and the second heat exchange device 12, and are limited by the structure of the finned heat exchangers, only the gas distribution pipes and the liquid collecting pipes of the finned heat exchangers can be arranged on the same side of the condenser, each branch of the condenser is generally divided into a superheating section and a condensing section, and the refrigerant condensed into liquid is collected by the liquid collecting pipes and then further subcooled in the finned pipes, so that the coil pipes of the subcooled part are arranged at the bottommost part of the condenser. In this way, the coil of the condenser is very close to the sheet metal part, and the bulges or uneven surfaces on the sheet metal part can influence the heat exchange between the refrigerant and the hygroscopic solution and the air medium. Therefore, referring to fig. 2, the invention also discloses a refrigeration and heat exchange device. As shown, the refrigeration heat exchange device disclosed by the invention comprises a first heat transfer loop F1 'and a second heat transfer loop F2', wherein refrigerant flows in the first heat transfer loop F1 ', and hygroscopic solution flows in the second heat transfer loop F2'. The refrigeration heat exchange apparatus disclosed in this embodiment includes at least a first heat exchange zone E1, a second heat exchange zone E2, and a third heat exchange zone E3. The first heat exchange area E1 is used for heat exchange between refrigerant flowing in the first heat transfer loop F1 'and hygroscopic solution flowing in the second heat transfer loop F2', the second heat exchange area E2 is used for heat exchange between refrigerant in the first heat transfer loop F1 'and air medium, and the third heat exchange area E3 is used for heat exchange between hygroscopic solution in the second heat transfer loop F2' and air medium. The refrigerant is cooled and condensed in the second heat exchange area E2, and the moisture absorption solution is cooled in the third heat exchange area E3, so that the moisture absorption solution is prevented from carrying redundant heat to enter an air-conditioned room.
This embodiment is described in detail with reference to FIGS. 1 and 2The principle and the working process of the refrigeration heat exchange equipment adopted in the embodiment. The first heat transfer circuit F1 'of the refrigeration heat exchange device is arranged in the first fluid circuit F1, the second heat transfer circuit F2' is arranged in the second fluid circuit F2, and the refrigeration heat exchange device is arranged in the first heat transfer region S1, i.e., the first casing 5 on the outdoor side. Similar to the first embodiment, the refrigeration heat exchange device is disposed between the first fan 31 and the regeneration module 21, and the regeneration module 21 adopts an open structure. The hygroscopic solution flowing out of the indoor-side dehumidification module 22 is heat-exchanged with the hygroscopic solution in the first heat exchange section 41 to the first temperature T1. Exchanges heat with the refrigerant in the second heat exchange tube section 42 to a second temperature T2Having a second temperature T2Flows in the second heat transfer loop F2' of the refrigeration heat exchange equipment. Having a second temperature T2Is heat-exchanged with the refrigerant flowing in the first heat transfer circuit F1' to a third temperature T3I.e. the regeneration temperature of the hygroscopic solution, and then flows into the regeneration module 21, correspondingly having the second temperature T2The refrigerant after heat exchange of the moisture absorption solution flows into a second heat exchange area E2 of the refrigeration heat exchange device, and exchanges heat with the air medium under the action of the first fan 31, so that the temperature of the moisture absorption solution is increased under the condition that an external heat source is not needed. In fact, the first fluid circuit F1 and the second fluid circuit F2 are also coupled in the first heat exchange area E1, in particular the first heat exchange area E1 comprises two telescopingly connected heat exchange tubes in one of which the refrigerant discharged from the discharge of the compressor flows, having the second temperature T2The hygroscopic solution flows in the other heat exchange tube, after heat exchange, the temperature of the refrigerant discharged from the exhaust port of the compressor is slightly reduced, and the hygroscopic solution is heated to the regeneration temperature T3And flows into the regeneration module 21 to effect energy exchange. The slightly reduced temperature superheated steam then enters a second heat exchange zone E2 of the refrigeration heat exchange equipment, where the second heat exchange zone E2 is a finned tube heat exchanger and further energy exchange is performed by the convection air medium driven by the first fan 31.
Correspondingly, the temperature change process of the regenerated hygroscopic solution is as follows, namely, the self-regeneration moldThe regenerated hygroscopic solution with higher temperature and concentration flowing out of the block 21 firstly enters the first heat exchange tube section 41 to exchange heat with the hygroscopic solution with lower temperature and lower concentration, and the temperature of the hygroscopic solution with high concentration is reduced to the fourth temperature T4The temperature of the low concentration hygroscopic solution is raised to a second temperature T2. Having a fourth temperature T4The hygroscopic solution is introduced into a third heat exchange area E3 of the refrigeration heat exchange equipment, exchanges heat with a convection air medium driven by the first fan 31, and is cooled to a fifth temperature T5Has a fifth temperature T5Further heat exchange of the hygroscopic solution in the fourth heat exchange tube section 44 reduces the temperature thereof to T6And flows into the dehumidification module 22 to dehumidify the room at a low temperature and a high concentration. The third heat exchange area E3 of the refrigeration heat exchange apparatus is a fin heat exchanger of the same specification as the second heat exchange area E2. The first heat exchange area E1, the second heat exchange area E2 and the third heat exchange area E3 are integrated in the same refrigeration heat exchange device, and the third heat exchange area E3 is arranged at the bottom of the refrigeration heat exchange device, so that sensible heat exhausted from the exhaust port of the compressor can be ensured to exchange heat in a gas-liquid heat exchange mode, and compared with a gas-gas heat exchange mode, the heat exchange device has a higher average heat exchange coefficient. Therefore, by adopting the refrigeration heat exchange equipment disclosed by the embodiment, compared with the traditional finned condenser, the heat exchange area can be reduced, and the utilization efficiency of sensible heat in exhaust of the exhaust port of the compressor can be obviously improved under the conditions of the same compressor displacement and the same ambient temperature. Meanwhile, the gas-liquid heat exchange with the bottom does not depend on air medium, so that the working performance of the equipment is not affected even if the surface of the sheet metal part at the bottom is not smooth.
Referring to fig. 4, a preferred regeneration module 21 that can be used in the air conditioner disclosed in the above two embodiments of the present invention is shown. The regeneration module 21 comprises a liquid inlet pipe 21-1 arranged at the upper side and a liquid outlet pipe 21-6 arranged at the lower side. The hygroscopic solution is heat-exchanged in the third heat exchange tube section 43 to reach the regeneration temperature T3Then enters a liquid inlet pipe 21-1 positioned at the upper side of the regeneration module 21, and the liquid inlet pipe 21-1 is communicated with a liquid distribution pipe 21-2. The liquid separating pipe 21-2 is provided with a plurality of liquid separating ports 21-3 which are uniformly arranged, and the liquid separating ports 21-3 uniformly divide the moisture absorption solutionLeading into the regeneration packing 21-4. The water vapor in the moisture absorption solution is carried away by the outdoor air medium under the action of the first fan 31, so that the moisture absorption capacity is recovered, and the formed concentrated solution is collected in the liquid collector 21-5 and finally flows out from the liquid outlet pipe 21-6 positioned at the lower side of the regeneration module 21.
Referring to fig. 3, a schematic cross-sectional view of a regeneration module 21 disclosed in fig. 3 is adopted in a first housing 5 located outdoors, and as shown in the figure, a conventional condenser 11 disclosed in the first embodiment adopted in the first housing 5 or a refrigeration heat exchange device adopted in the second embodiment is preferably L-shaped, and the L-shaped condenser 11 or the refrigeration heat exchange device is partially arranged around the regeneration module 21 and a first fan 31, so that on one hand, sufficient heat exchange among an air medium, a refrigerant and a hygroscopic solution can be ensured, and the regeneration efficiency of the hygroscopic solution in the regeneration module 21 can be remarkably improved. In the air conditioner disclosed in this embodiment, the regenerated filler is preferably a metal filler type or a seek wet film material.
The air conditioner disclosed by the invention realizes energy transfer through the first fluid loop F1 and the second fluid loop F2 which are partially coupled, drives the hygroscopic solution to flow in the second fluid loop F2, and realizes dehumidification and regeneration. The air conditioner does not need an additional heat source, the evaporator 12 does not need to bear a dehumidification function in the refrigeration cycle, and the evaporation temperature can be increased to be higher than the dew point temperature of air, so that the aim of improving the energy efficiency is fulfilled. Furthermore, the evaporator 12 operates in a dry condition and does not produce condensed water, so that the sanitary condition of the indoor unit can be improved. Through tests, the energy efficiency of the air conditioner can be improved by at least more than 10%.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The refrigeration heat exchange equipment is characterized in that the refrigeration heat exchange equipment is arranged in a first shell, and the refrigeration heat exchange equipment is a condenser in a refrigeration dehumidification mode; the refrigeration heat exchange equipment comprises a first heat transfer loop and a second heat transfer loop, wherein refrigerant flows in the first heat transfer loop, and hygroscopic solution flows in the second heat transfer loop; the heat exchanger also at least comprises a first heat exchange area, a second heat exchange area and a third heat exchange area; the refrigerant flowing in the first heat transfer loop and the hygroscopic solution flowing in the second heat transfer loop exchange heat in the first heat exchange area, the refrigerant after heat exchange flows into the second heat exchange area to exchange heat with an air medium, and the hygroscopic solution in the second heat transfer loop exchanges heat with the air medium in the third heat exchange area; wherein the first heat transfer circuit is disposed in a first fluid circuit and the second heat transfer circuit is disposed in a second fluid circuit; the second fluid circuit comprises a dehumidification module and a regeneration module;
the second fluid loop is also provided with a first heat exchange pipe section, and the hygroscopic solution flowing out of the dehumidification module exchanges heat with the hygroscopic solution in the first heat exchange pipe section to reach a first temperature T1；
Further comprising a second heat exchange tube segment comprising a portion of a first fluid circuit and a portion of a second fluid circuit, the first and second fluid circuits coupled at the second heat exchange tube segment having a first temperature T1Is heat exchanged with the refrigerant in said second heat exchange tube section to a second temperature T2The refrigerant flowing in the second heat exchange tube section comes from the high-temperature refrigerant at the outlet of the condenser;
also included is a third heat exchange tube segment having a second temperature T2Flows in the second heat transfer circuit and exchanges heat with the refrigerant flowing in the first heat transfer circuit and discharged from the compressor to a third temperature T3A rear inflow regeneration module, the third heat exchange tube section is arranged at the air outlet of the compressor, and the refrigerant flowing in the third heat exchange tube section comes from the air outlet of the compressorHigh temperature refrigerant vapor at the compressor outlet; and has a second temperature T2The refrigerant after heat exchange of the hygroscopic solution flows into a second heat exchange area to exchange heat with an air medium; wherein T is3＞T2＞T1，T3The regeneration temperature of the hygroscopic solution;
further comprising a fourth heat exchange tube segment, the first fluid circuit and the second fluid circuit further coupled at the fourth heat exchange tube segment, wherein the fourth heat exchange tube segment comprises a portion of the first fluid circuit and a portion of the second fluid circuit; the hygroscopic solution flowing out of the regeneration module exchanges heat with the hygroscopic solution in the first heat exchange tube section to a fourth temperature T4(ii) a Having a fourth temperature T4The hygroscopic solution exchanges heat with the air medium to a fifth temperature T in a third heat exchange area5And exchanges heat with the refrigerant in the fourth heat exchange pipe section to a sixth temperature T6The refrigerant flowing in the fourth heat exchange pipe section is gaseous refrigerant at the air inlet end of the compressor, wherein T4＞T5＞T6，T6The dehumidification temperature of the hygroscopic solution.
2. A refrigeration heat exchange device as recited in claim 1 wherein the first heat exchange area comprises two heat exchange tubes in nested connection, refrigerant discharged from a compressor discharge port flows in one of the heat exchange tubes, and hygroscopic solution before regeneration flows in the other heat exchange tube; the second heat exchange area is a finned tube heat exchanger, and the third heat exchange area is a finned tube heat exchanger; the regenerated hygroscopic solution is heat-exchanged with the air medium in the third heat exchange zone.
3. The refrigeration heat exchange unit of claim 2 wherein the first heat exchange region is disposed at a bottom of the refrigeration heat exchange unit.
4. An air conditioner characterized by having a refrigeration heat exchange apparatus as claimed in any one of claims 1 to 3.
5. The air conditioner of claim 4, comprising a first housing disposed in a first heat transfer area; the refrigeration heat exchange equipment and the regeneration module are arranged in the first shell.
6. The air conditioner according to claim 5, further comprising a second case provided in the second heat transfer area; the dehumidification module is arranged in the second shell; in the second housing, a heat exchange device exchanges heat with the air medium in the second heat transfer area, and the hygroscopic solution in the dehumidification module exchanges heat with the refrigerant in the heat exchange device and the air medium in the second heat transfer area.
7. The air conditioner according to claim 6, wherein the regeneration temperature is 60 to 80 ℃; the exhaust temperature of the compressor is 70 to 80 ℃; the hygroscopic solution is one of water-calcium chloride, water-lithium chloride or water-lithium bromide.
8. The air conditioner of claim 7, wherein the regeneration module comprises a liquid inlet pipe, a liquid distribution pipe, regeneration filler, a liquid collector and a liquid outlet pipe; the liquid inlet pipe is arranged on the upper side of the regeneration module, and the liquid outlet pipe is arranged on the lower side of the regeneration module.
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Effective date of registration: 20201030 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Patentee after: Haier Zhijia Co.,Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |