US20100089091A1 - Absorption refrigerating apparatus - Google Patents

Absorption refrigerating apparatus Download PDF

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Publication number
US20100089091A1
US20100089091A1 US12/449,584 US44958408A US2010089091A1 US 20100089091 A1 US20100089091 A1 US 20100089091A1 US 44958408 A US44958408 A US 44958408A US 2010089091 A1 US2010089091 A1 US 2010089091A1
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Prior art keywords
aqueous solution
moisture absorbent
refrigerant
refrigerating apparatus
regenerator
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US12/449,584
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English (en)
Inventor
Hidetoshi Kaneo
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Hachiyo Engineering Co Ltd
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Hachiyo Engineering Co Ltd
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Assigned to HACHIYO ENGINEERING CO., LTD. reassignment HACHIYO ENGINEERING CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KANEO, HIDETOSHI
Publication of US20100089091A1 publication Critical patent/US20100089091A1/en
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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
    • F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
    • F25B15/14—Sorption machines, plants or systems, operating continuously, e.g. absorption type using osmosis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3201—Cooling devices using absorption or adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3201—Cooling devices using absorption or adsorption
    • B60H1/32011—Cooling devices using absorption or adsorption using absorption, e.g. using Li-Br and water

Definitions

  • the present invention relates to an absorption refrigerating apparatus and, in particular, to an apparatus that can be miniaturized and can be also mounted on a mover such as an automobile or the like.
  • chlorofluorocarbon used as a refrigerant of an apparatus such as an air conditioner or a refrigerating machine has been replaced with a natural medium such as ammonia, carbon dioxide, carbon hydride, water or the like in view of problems of ozone layer depletion, global warming, and the like.
  • an apparatus using water as a refrigerant has advantages that the water is low in cost, the water hardly affects the human body and the environment even if it leaks out, the water is easily processed when disposed, latent heat of evaporation of the water is large, and the viscosity of the water is relatively low.
  • the apparatus has disadvantages that it is forced to be significantly large in size per unit capability when designed as a practical machine, because the specific volume of steam in an operating temperature zone is great, resulting in an increase in manufacturing cost and limiting installation places.
  • An example of the above-mentioned apparatus using water as a refrigerant is an absorption refrigerating apparatus F′.
  • the apparatus includes an evaporator 1 ′, an absorber 2 ′, a regenerator 3 ′, and a condenser 4 ′, as illustrated in FIG. 6 , as an example.
  • the evaporator 1 ′ evaporates water W to take heat of evaporation out of the water W and provide the water W as a refrigerant.
  • the water W positioned in the evaporator 1 ′ and the aqueous solution of the moisture absorbent D positioned in the absorber 2 ′ may be mixed with each other and the dehydrated aqueous solution of the moisture absorbent D positioned in the regenerator 3 ′ and the water W positioned in the condenser 4 ′ may be mixed with each other because of its configuration. Therefore, due to the above reason, combined with the difficulty in miniaturizing the whole apparatus, the mounting of the apparatus on a mover such as an automobile or the like has not been realized (see Patent document 1, for example).
  • Patent document 1 Japanese Patent Application Laid-Open Publication No. 2003-21418
  • the present invention is directed to developing a new absorption refrigerating apparatus that can be miniaturized and can be mounted on a mover such as an automobile or the like.
  • An absorption refrigerating apparatus as set forth in claim 1 includes an evaporation and absorption unit including an evaporator and an absorber installed adjacent to the evaporator, and a regeneration and condensation unit including a regenerator and a condenser installed adjacent to the regenerator, wherein the evaporator evaporates water in a refrigerant to take heat of evaporation out of the refrigerant, to decrease the temperature of the refrigerant and provide the refrigerant for cooling, steam produced at this time is absorbed in an aqueous solution of a moisture absorbent in the absorber to promote the evaporation of the water from the refrigerant, the regenerator removes the water absorbed in the aqueous solution of the moisture absorbent and feeds the aqueous solution of the moisture absorbent to the absorber again to cyclically use the aqueous solution of the moisture absorbent, and the condenser recovers the water removed from the aqueous solution of the moisture absorbent and feeds the water to the evapor
  • the movement of the steam from the evaporator to the absorber and the movement of the steam from the regenerator to the condenser are not blocked while avoiding the refrigerant positioned in the evaporator and the aqueous solution of the moisture absorbent positioned in the absorber being mixed with each other and avoiding the dehydrated aqueous solution of the moisture absorbent positioned in the regenerator and the water positioned in the condenser being mixed with each other.
  • This enables the apparatus to be mounted on a mover such as an automobile or the like.
  • the absorption refrigerating apparatus as set forth in claim 2 is characterized in that the evaporator and the absorber are provided in the same housing.
  • the total volume of the evaporator and the absorber can be reduced without reducing their respective capacities, so that the apparatus can be miniaturized.
  • the absorption refrigerating apparatus as set forth in claim 3 is characterized in that the regenerator and the condenser are provided in the same housing.
  • the total volume of the regenerator and the condenser can be reduced without reducing their respective capacities, so that the apparatus can be miniaturized.
  • the absorption refrigerating apparatus as set forth in claim 4 is characterized in that a demister is interposed between the evaporator and the absorber or between the regenerator and the condenser.
  • the refrigerant or the aqueous solution of the moisture absorbent can be prevented from coming into direct contact with semi-permeable membranes of adjacent devices and a semi-permeable membrane disposed in the boundary between the devices when the apparatus is vibrated, to thereby avoid preventing the penetration of the steam and loosing heat.
  • the absorption refrigerating apparatus as set forth in claim 5 is characterized in that the semi-permeable membrane is tubular, and is filled with the refrigerant or the aqueous solution of the moisture absorbent.
  • the steam can be exhaled through the tubular semi-permeable membrane in the evaporator, the steam can be accepted in the aqueous solution of the moisture absorbent through the tubular semi-permeable membrane in the absorber, the water can be exhaled from the aqueous solution of the moisture absorbent through the tubular semi-permeable membrane in the regenerator, and the steam can be further accepted and condensed through the tubular semi-permeable membrane in the condenser.
  • the absorption refrigerating apparatus as set forth in claim 6 is characterized in that the semi-permeable membrane is a membrane provided to separate the evaporator and the absorber or the regenerator and the condenser.
  • the steam can be exhaled through the filmy semi-permeable membrane in the evaporator, the steam can be accepted in the aqueous solution of the moisture absorbent through the filmy semi-permeable membrane in the absorber, the water can be exhaled from the aqueous solution of the moisture absorbent through the filmy semi-permeable membrane in the regenerator, and the steam can be further accepted and condensed through the filmy semi-permeable membrane in the condenser.
  • the absorption refrigerating apparatus as set forth in claim 7 is characterized in that a capillary tube assembly is provided on a surface of the refrigerant in the evaporator.
  • the evaporation of the refrigerant can be promoted. Furthermore, the refrigerant or the aqueous solution of the moisture absorbent can be prevented from coming into direct contact with semi-permeable membranes of adjacent devices and a semi-permeable membrane disposed in the boundary between the devices when the apparatus is vibrated, to thereby avoid preventing the penetration of the steam.
  • the absorption refrigerating apparatus as set forth in claim 8 is characterized in that the refrigerant is an aqueous solution of a moisture absorbent that is weaker in moisture absorption power than the aqueous solutions of the moisture absorbents positioned in the absorber and the regenerator.
  • the condenser can smoothly recover the steam produced in the regenerator.
  • the absorption refrigerating apparatus can be mounted on an automobile or the like because it can be miniaturized while the resistance against vibration thereof can be improved.
  • exhaust heat of an engine can be used as an energy for car air-conditioning. Therefore, the energy can be effectively made use of.
  • FIG. 1 is a block diagram illustrating an absorption refrigerating apparatus according to an embodiment of the present invention in which both a circulation path of a refrigerant and a circulation path of an aqueous solution of a moisture absorbent are respectively formed as closed paths.
  • FIG. 2 is a perspective view illustrating an example in which an evaporation tube and an absorption tube are installed.
  • FIGS. 3( a ) and 3 ( b ) each are a block diagram illustrating an absorption refrigerating apparatus according to an embodiment of the present invention in which either one of a circulation path of a refrigerant and a circulation path of an aqueous solution of a moisture absorbent is formed as a closed path.
  • FIGS. 4( a ) and 4 ( b ) each are a block diagram illustrating an absorption refrigerating apparatus according to an embodiment of the present invention in which parts of a circulation path of a refrigerant and a circulation path of an aqueous solution of a moisture absorbent are respectively brought into opened states.
  • FIG. 5 is a block diagram illustrating an absorption refrigerating apparatus according to an embodiment of the present invention in which an evaporator, an absorber, a regenerator, and a condenser are respectively brought into opened states.
  • FIG. 6 is a block diagram illustrating a conventional absorption refrigerating apparatus.
  • an evaporator 1 evaporates water from a refrigerant such as water W to take heat of evaporation out of the refrigerant, to thus decrease the temperature of the refrigerant.
  • the refrigerant is supplied to a cooling device 5 to provide the refrigerant for indoor cooling or the like.
  • a condenser 4 recovers the water removed from the aqueous solution of the moisture absorbent D by the regenerator 3 .
  • the water is fed to the evaporator 1 again and cyclically used.
  • the aqueous solution of the moisture absorbent D is a solution using lithium bromide, lithium chloride or the like as a moisture absorbent. In addition thereto, an appropriate moisture absorbent can also be used.
  • the refrigerant may include one using a moisture absorbent having a lower moisture absorption capability than that of the aqueous solution of the moisture absorbent D and one using a low-concentrated aqueous solution of a moisture absorbent Dw using the same moisture absorbent as that used by the aqueous solution of the moisture absorbent D, as described in the following embodiments, in addition to the water W.
  • the absorption refrigerating apparatus F according to the present invention will be described according to a plurality of embodiments that differ in form. However, the embodiments can also be changed, as needed, within the technical scope of the present invention.
  • an absorption refrigerating apparatus F includes an evaporator 1 and an absorber 2 installed adjacent to the evaporator 1 and a regenerator 3 and a condenser 4 installed adjacent to the regenerator 3 .
  • the evaporator 1 and the absorber 2 are provided in an evaporation and absorption unit U 1 serving as a housing having airtightness
  • the regenerator 3 and the condenser 4 are provided in a regeneration and condensation unit U 2 serving as a housing having airtightness.
  • the evaporator 1 , the absorber 2 , the regenerator 3 , and the condenser 4 respectively have an evaporation tube 10 , an absorption tube 20 , a regeneration tube 30 , and a condensation tube 40 provided in the evaporation and absorption unit U 1 or the regeneration and condensation unit U 2 .
  • Each of the evaporation tube 10 , the absorption tube 20 , the regeneration tube 30 , and the condensation tube 40 is composed of a tube to which a semi-permeable membrane is applied.
  • the semi-permeable membrane is made of a hollow fiber separation membrane, ceramic or the like as a material. Only water molecules (water W, steam S) can penetrate through the semi-permeable membrane, while a moisture absorbent in the aqueous solution of the moisture absorbent D and a moisture absorbent in a low-concentrated aqueous solution of a moisture absorbent Dw cannot penetrate therethrough.
  • a closed path is formed by respectively connecting a flow inlet 11 of the evaporation tube 10 and a flow outlet 42 of the condensation tube 40 and connecting a flow outlet 12 of the evaporation tube 10 and a flow inlet 41 of the condensation tube 40 , and the low-concentrated aqueous solution of the moisture absorbent Dw is sealed thereinto. Furthermore, a cooling device 5 is provided between the flow outlet 12 and the flow inlet 41 , and a pump P 1 is provided at an appropriate point.
  • the low-concentrated aqueous solution of the moisture absorbent Dw is set lower in the concentration of the moisture absorbent, i.e., the moisture absorption capability, than the aqueous solution of the moisture absorbent D sealed into a closed path including the absorption tube 20 and the regeneration tube 30 , described below.
  • a closed path is formed by respectively connecting a flow inlet 21 of the absorption tube 20 and a flow outlet 32 of the regeneration tube 30 and connecting a flow outlet 22 of the absorption tube 20 and a flow inlet 31 of the regeneration tube 30 , and the aqueous solution of the moisture absorbent D is sealed thereinto. Furthermore, a heater 35 is provided between the flow outlet 22 and the flow inlet 31 , a precooler 24 is further provided between the flow outlet 32 and the flow inlet 21 , and a pump P 2 is provided at an appropriate point.
  • the evaporation and absorption unit U 1 and the absorption refrigerating apparatus F can be further miniaturized.
  • the absorption refrigerating apparatus F according to the embodiment illustrated in FIG. 1 is configured, as described above, as an example. The operating manner thereof will be described below.
  • the pumps P 1 and P 2 are started to respectively circulate the low-concentrated aqueous solution of the moisture absorbent Dw and the aqueous solution of the moisture absorbent D within the circulation paths while starting the precooler 24 and the heater 35 .
  • the absorption refrigerating apparatus F is mounted on an automobile, exhaust heat of an engine is effectively utilized as a heat source of the heater 35 .
  • the aqueous solution of the moisture absorbent D cooled by the precooler 24 is supplied to the absorption tube 20 with its moisture absorption capability enhanced. Therefore, water in the low-concentrated aqueous solution of the moisture absorbent Dw positioned in the evaporation tube 10 is forced to evaporate within the evaporation and absorption unit U 1 . Therefore, the water in the low-concentrated aqueous solution of the moisture absorbent Dw evaporates into steam S.
  • the steam S penetrates through the evaporation tube 10 and further penetrates through the absorption tube 20 while being absorbed by the aqueous solution of the moisture absorbent D within the absorption tube 20 .
  • a case where the water W that has oozed out to a surface of the evaporation tube 10 evaporates here is also assumed.
  • the low-concentrated aqueous solution of the moisture absorbent Dw within the evaporation tube 10 decreases in temperature after heat of evaporation is taken out, and is fed to the cooling device 5 and provided as a refrigerant in this state.
  • the low-concentrated aqueous solution of the moisture absorbent Dw within the evaporation tube 10 increases in concentration, while the aqueous solution of the moisture absorbent D within the absorption tube 20 decreases in concentration.
  • the aqueous solution of the moisture absorbent D discharged from the flow outlet 22 is supplied to the regeneration tube 30 after the temperature thereof is raised by the heater 35 so that the water in the aqueous solution of the moisture absorbent D evaporates into steam S within the regeneration tube 30 .
  • the steam S penetrates through the regeneration tube 30 and further penetrates through the condensation tube 40 while being absorbed by the low-concentrated aqueous solution of the moisture absorbent Dw positioned in the condensation tube 40 .
  • a case where the water W condensed on a surface of the condensation tube 40 is absorbed in the low-concentrated aqueous solution of the moisture absorbent Dw after penetrating through the condensation tube 40 is also assumed.
  • the aqueous solution of the moisture absorbent D within the regeneration tube 30 increases in concentration, while the low-concentrated aqueous solution of the moisture absorbent Dw within the condensation tube 40 decreases in concentration.
  • the aqueous solution of the moisture absorbent D and the low-concentrated aqueous solution of the moisture absorbent Dw are respectively fed to the absorption tube 20 and the evaporation tube 10 again and cyclically used.
  • the absorption refrigerating apparatus F is unitized by providing two types of devices in one housing so that the whole apparatus can be miniaturized.
  • Water molecules can penetrate through the evaporation tube 10 , the absorption tube 20 , the regeneration tube 30 , and the condensation tube 40 each composed of a semi-permeable membrane, while the moisture absorbents in the aqueous solution of the moisture absorbent D and the low-concentrated aqueous solution of the moisture absorbent Dw cannot penetrate therethrough. Even when the apparatus swings and is vibrated, the aqueous solution of the moisture absorbent D and the low-concentrated aqueous solution of the moisture absorbent Dw are not mixed with each other in practice.
  • the absorption refrigerating apparatus F can be realized as an apparatus that can be mounted on a mover such as an automobile or the like.
  • an evaporation tube 10 and a condensation tube 40 are each composed of a tube to which a semi-permeable membrane is applied.
  • a closed path is formed by respectively connecting a flow inlet 11 of the evaporation tube 10 and a flow outlet 42 of the condensation tube 40 and connecting a flow outlet 12 of the evaporation tube 10 and a flow inlet 41 of the condensation tube 40 through lines, and a low-concentrated aqueous solution of a moisture absorbent Dw serving as a refrigerant is sealed into the closed path.
  • a cooling device 5 is provided between the flow outlet 12 and the flow inlet 41 , and a pump P 1 is further provided at an appropriate point.
  • the evaporation tube 10 and the condensation tube 40 are respectively disposed in upper parts in housings of an evaporation and absorption unit U 1 and a regeneration and condensation unit U 2 .
  • the circulation path of the aqueous solution of the moisture absorbent D is formed in an opened state
  • a nozzle 23 is disposed below a demister 6 provided in a housing of the evaporation and absorption unit U 1
  • the nozzle 23 and a discharge port 36 formed at the bottom of a housing of the regeneration and condensation unit U 2 are connected to each other through an appropriate line.
  • a cooler 25 and a pump P 3 are provided in the line.
  • a nozzle 33 is disposed below a demister 6 provided in the housing of the regeneration and condensation unit U 2 , and the nozzle 33 and a discharge port 26 formed at the bottom of the housing of the evaporation and absorption unit U 1 are connected to each other through an appropriate line.
  • a pump P 2 and a heater 35 are provided in the line.
  • the circulation path of the aqueous solution of the moisture absorbent D is thus formed, and an area between the nozzle 23 and the discharge port 26 and an area between the nozzle 33 and the discharge port 36 are respectively in opened states.
  • the aqueous solution of the moisture absorbent D is sprayed from the nozzles 23 and 33 within the housings of the evaporation and absorption unit U 1 and the regeneration and condensation unit U 2 , and is circulated while being temporarily stored in lower parts of the housings.
  • the absorption refrigerating apparatus F according to the present embodiment is configured, as described above, as an example. The operating manner thereof will be described below.
  • the pumps P 1 , P 2 , and P 3 are started to respectively circulate the low-concentrated aqueous solution of the moisture absorbent Dw and the aqueous solution of the moisture absorbent D within the circulation paths while starting the precooler 24 and the heater 35 .
  • the aqueous solution of the moisture absorbent D cooled by the precooler 24 is sprayed from the nozzle 23 with its moisture absorption capability enhanced. Therefore, water in the low-concentrated aqueous solution of the moisture absorbent Dw positioned in the evaporation tube 10 is forced to evaporate within the evaporation and absorption unit U 1 . Therefore, the water in the low-concentrated aqueous solution of the moisture absorbent Dw evaporates into steam S. The steam S penetrates through the evaporation tube 10 and further passes through the demister 6 while being absorbed by the aqueous solution of the moisture absorbent D.
  • the low-concentrated aqueous solution of the moisture absorbent Dw within the evaporation tube 10 decreases in temperature after heat of evaporation is taken out, and is fed to the cooling device 5 and provided as a refrigerant in this state.
  • the low-concentrated aqueous solution of the moisture absorbent Dw within the evaporation tube 10 increases in concentration, while the aqueous solution of the moisture absorbent D in a stored state within the evaporation and absorption unit U 1 decreases in concentration.
  • the aqueous solution of the moisture absorbent D discharged from the discharge port 26 is sprayed from the nozzle 33 after the temperature thereof is raised by the heater 35 so that the water in the aqueous solution of the moisture absorbent D evaporates into steam S.
  • the steam S passes through the demister 6 and further penetrates through the condensation tube 40 while being absorbed by the low-concentrated aqueous solution of the moisture absorbent Dw positioned in the condensation tube 40 .
  • the aqueous solution of the moisture absorbent D in a stored state within the regeneration and condensation unit U 2 increases in concentration, while the low-concentrated aqueous solution of the moisture absorbent Dw within the condensation tube 40 decreases in concentration.
  • the aqueous solution of the moisture absorbent D and the low-concentrated aqueous solution of the moisture absorbent Dw are respectively fed to the nozzle 23 and the evaporation tube 10 again and cyclically used.
  • the demisters 6 are respectively positioned above the nozzles 23 and 33 . Therefore, the aqueous solution of the moisture absorbent D does not come into direct contact with the evaporation tube 10 and the condensation tube 40 within the respective housings of the evaporation and absorption unit U 1 and the regeneration and condensation unit U 2 . This can prevent the penetration of water molecules (water W, steam S) through the semi-permeable membranes composing the evaporation tube 10 and the condensation tube 40 from being blocked.
  • the absorption refrigerating apparatus F can be realized as an apparatus that can be mounted on a mover such as an automobile or the like.
  • the absorption refrigerating apparatus F is unitized by providing two types of devices in one housing. Therefore, the whole apparatus can be miniaturized.
  • an area between the evaporator 1 and the condenser 4 is formed as a closed path
  • an area between an absorber 2 and a regenerator 3 is alternatively formed as a closed path by changing a point at which the device provided between the evaporation and absorption unit U 1 and the regeneration and condensation unit U 2 in the apparatus is installed while installing a cooler 44 within a condenser 4 .
  • a capillary tube assembly 15 composed of a fiber material capable of producing a capillary phenomenon may be installed on a surface of the water W in a stored state within the evaporator 1 to promote the evaporation of the water W.
  • an evaporation tube 10 and a regeneration tube 30 are each composed of a tube to which a semi-permeable membrane is applied, and a circulation path of water W serving as a refrigerant is formed by connecting a flow inlet 11 of the evaporation tube 10 and a discharge port 46 and connecting a flow outlet 12 of the evaporation tube 10 and a nozzle 43 .
  • a cooling device 5 is provided between the flow outlet 12 and the nozzle 43 , and a pump P 1 is further provided at an appropriate point.
  • Each of respective housings of an evaporation and absorption unit U 1 and a regeneration and condensation unit U 2 is partitioned into upper and lower spaces by a demister 6 .
  • the evaporation tube 10 is disposed in the upper space of the evaporation and absorption unit U 1
  • the nozzle 43 is disposed in the lower space of the regeneration and condensation unit U 2 .
  • the circulation path of the aqueous solution of the moisture absorbent D is formed by connecting a nozzle 23 disposed in the lower space of the evaporation and absorption unit U 1 and a flow outlet 32 of the regeneration tube 30 disposed in the upper space of the regeneration and condensation unit U 2 through a line and connecting a discharge port 26 and a flow inlet 31 of the regeneration tube 30 through a line.
  • a precooler 24 is provided between the nozzle 23 and the flow outlet 32 , and a pump P 2 and a heater 35 are provided between the discharge port 26 and the flow inlet 31 .
  • a cooler 25 is provided below the nozzle 23
  • a cooler 44 is provided below the nozzle 43 .
  • the absorber 2 in the circulation path of the aqueous solution of the moisture absorbent D enters an opened state between the nozzle 23 and the discharge port 26
  • the condenser 4 in the circulation path of the water W serving as the refrigerant enters an opened state between the nozzle 43 and the discharge port 46 .
  • the absorption refrigerating apparatus F according to the present embodiment is configured, as described above, as an example. The operating manner thereof will be described below.
  • the pumps P 1 and P 2 are started to respectively circulate the water W and the aqueous solution of the moisture absorbent D within the respective circular paths while starting the precooler 24 , the cooler 25 , the heater 35 , and the cooler 44 .
  • the aqueous solution of the moisture absorbent D cooled by the precooler 24 is sprayed from the nozzle 23 with its moisture absorption capability enhanced, and is further cooled by the cooler 25 so that the moisture absorption capability is enhanced.
  • the water W positioned in the evaporation tube 10 is forced to evaporate.
  • a part of the water W evaporates into steam S.
  • the steam S penetrates through the evaporation tube 10 and further passes through the demister 6 while being absorbed by the aqueous solution of the moisture absorbent D.
  • the water W within the evaporation tube 10 decreases in temperature after heat of evaporation is taken out, and is fed to the cooling device 5 and provided as a refrigerant in this state.
  • the aqueous solution of the moisture absorbent D in a stored state within the evaporation and absorption unit U 1 decreases in concentration.
  • the aqueous solution of the moisture absorbent D discharged from the discharge port 26 is supplied to the regeneration tube 30 after the temperature thereof is raised by the heater 35 .
  • water in the aqueous solution of the moisture absorbent D evaporates into steam S.
  • the steam S penetrates through the regeneration tube 30 .
  • the steam S that has further passed through the demister 6 comes into contact with the water W sprayed from the nozzle 43 , and is further cooled by the cooler 44 and condensed.
  • the aqueous solution of the moisture absorbent D in the regeneration tube 30 increases in concentration.
  • the aqueous solution of the moisture absorbent D and the water W are respectively fed to the nozzle 23 and the evaporation tube 10 again and cyclically used.
  • the demisters 6 are respectively positioned above the nozzles 23 and 43 . Therefore, the aqueous solution of the moisture absorbent D does not come into direct contact with the evaporation tube 10 within the housing of the evaporation and absorption unit U 1 , and the water W does not come into direct contact with the regeneration tube 30 within the housing of the regeneration and condensation unit U 2 . This can prevent the penetration of the steam S through the semi-permeable membrane from being blocked by wetting of respective surfaces of the evaporation tube 10 and the regeneration tube 30 .
  • the absorption refrigerating apparatus F can be realized as an apparatus that can be mounted on a mover such as an automobile or the like.
  • the absorption refrigerating apparatus F is unitized by providing two types of devices in one housing, so that the whole apparatus can be miniaturized.
  • an evaporator 1 and a regenerator 3 can also be respectively brought into opened states, as illustrated in FIG. 4 ( b ).
  • a capillary tube assembly 15 composed of a fiber material capable of producing a capillary phenomenon may be installed on a surface of the low-concentrated aqueous solution of the moisture absorbent Dw within the evaporator 1 , to promote the evaporation of water.
  • the absorption refrigerating apparatus F illustrated in FIG. 5 is configured by partitioning each of respective housings of an evaporation and absorption unit U 1 and a regeneration and condensation unit U 2 into two spaces by a bulkhead 7 and a filmy semi-permeable membrane 8 while disposing respective members composing the evaporator 1 , the absorber 2 , the regenerator 3 , and the condenser 4 in the spaces.
  • a nozzle 13 is disposed in the left space in FIG. 5 to form the evaporator 1 , while the nozzle 23 and the cooler 25 are disposed in the right space to form the absorber 2 .
  • a nozzle 33 is disposed in the left space in FIG. 5 to form the regenerator 3
  • a cooler 44 is disposed in the right space to form the condenser 4 .
  • a circulation path of water W is formed by connecting the nozzle 13 and a discharge port 46 through a line with a mixing valve V interposed therebetween.
  • a discharge port 16 and the mixing valve V are connected to each other, and a pump P 1 and a cooling device 5 are provided halfway therebetween.
  • a circulation path of an aqueous solution of a moisture absorbent D is formed by connecting a discharge port 26 and the nozzle 33 to each other through a line with a heat exchanger 9 interposed therebetween and connecting a discharge port 36 and the nozzle 23 to each other through a line with the heat exchanger 9 interposed therebetween.
  • a precooler 24 is provided between the heat exchanger 9 and the nozzle 23
  • a heater 35 is provided between the heat exchanger 9 and the nozzle 33 .
  • a pump P 2 is provided between the discharge port 26 and the heat exchanger 9
  • a pump P 3 is provided between the discharge port 36 and the heat exchanger 9 .
  • the evaporator 1 in the circulation path of the water W serving as the refrigerant enters an opened state between the nozzle 13 and the discharge port 16 , and the condenser 4 is further formed in an opened state.
  • the absorber 2 in the circulation path of the aqueous solution of the moisture absorbent D enters an opened state between the nozzle 23 and the discharge port 26
  • the regenerator 3 enters an opened state between the nozzle 33 and the discharge port 36 .
  • the absorption refrigerating apparatus F according to the present embodiment is configured, as described above, as an example. The operating manner thereof will be described below.
  • the pumps P 1 , P 2 , and P 3 are started to circulate the water W and the aqueous solution of the moisture absorbent D within the respective circulation paths while starting the precooler 24 , the cooler 25 , the heater 35 , and the cooler 44 .
  • the aqueous solution of the moisture absorbent D cooled by the precooler 24 is sprayed from the nozzle 23 with its moisture absorption capability enhanced, and is further cooled by the cooler 25 so that the moisture absorption capability is enhanced.
  • the water W sprayed from the nozzle 13 is forced to evaporate.
  • a part of the water W evaporates into steam S.
  • the steam S penetrates through the semi-permeable membrane 8 while being absorbed by the aqueous solution of the moisture absorbent D within the absorber 2 .
  • the water W within the evaporation 1 decreases in temperature after heat of evaporation is taken out, and is fed to the cooling device 5 and provided as a refrigerant in this state.
  • the aqueous solution of the moisture absorbent D in a stored state within the absorber 2 decreases in concentration.
  • the aqueous solution of the moisture absorbent D discharged from the discharge port 26 passes through the heat exchanger 9 , is supplied to the nozzle 33 after the temperature thereof is raised by the heater 35 , and is sprayed into the regenerator 3 , where a part of the water evaporates into steam S.
  • the aqueous solution of the moisture absorbent D in a stored state within the regenerator 3 increases in concentration.
  • the aqueous solution of the moisture absorbent D passes through the heat exchanger 9 , it is fed to the nozzle 23 again via the precooler 24 and cyclically used after heat exchange with the aqueous solution of the moisture absorbent D fed from the discharge port 26 to the nozzle 33 .
  • the steam S produced in the regenerator 3 enters the condenser 4 after penetrating through the semi-permeable membrane 8 .
  • the steam S is cooled by the cooler 44 and condensed into water W.
  • the water W is fed to the mixing valve V from the discharge port 46 , to merge into the water W fed from the cooling device 5 in the mixing valve V, and is then fed to the nozzle 13 again and cyclically used.
  • Demisters 6 may be respectively provided above the nozzles 13 , 23 , and 33 . In this case, the aqueous solution of the moisture absorbent D and the water W do not come into direct contact with the semi-permeable membrane 8 . This prevents the penetration of the steam S through the semi-permeable membrane 8 from being blocked.
  • the semi-permeable membrane 8 allows the penetration of the steam S, while not allowing the penetration of the aqueous solution of the moisture absorbent D or the low-concentrated aqueous solution of the moisture absorbent Dw. Even when the apparatus swings or is vibrated, the aqueous solution of the moisture absorbent D and the low-concentrated aqueous solution of the moisture absorbent Dw are not mixed with each other.
  • the absorption refrigerating apparatus F can be realized as an apparatus that can be mounted on a mover such as an automobile or the like.
  • the absorption refrigerating apparatus F is unitized by providing two types of devices in one housing, so that the whole apparatus can be miniaturized.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Drying Of Gases (AREA)
US12/449,584 2007-02-16 2008-02-06 Absorption refrigerating apparatus Abandoned US20100089091A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2007-036378 2007-02-16
JP2007036378 2007-02-16
JP2007296448 2007-11-15
JP2007-296448 2007-11-15
PCT/JP2008/051912 WO2008099726A1 (ja) 2007-02-16 2008-02-06 吸収式冷凍装置

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US20100089091A1 true US20100089091A1 (en) 2010-04-15

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US12/449,584 Abandoned US20100089091A1 (en) 2007-02-16 2008-02-06 Absorption refrigerating apparatus

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US (1) US20100089091A1 (ja)
EP (1) EP2123997A1 (ja)
JP (1) JP5290776B2 (ja)
CN (1) CN101663545B (ja)
WO (1) WO2008099726A1 (ja)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
DE102016205120A1 (de) * 2016-03-29 2017-10-05 Mahle International Gmbh Absorptionskältemaschine

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EP2088389B1 (de) * 2008-02-05 2017-05-10 Evonik Degussa GmbH Absorptionskältemaschine
CN101943502A (zh) * 2010-08-17 2011-01-12 浙江大学 基于半透膜的热驱动吸收式制冷系统
DE102011110018A1 (de) * 2011-08-11 2013-02-14 Aaa Water Technologies Ag Absorptionskältemaschine
CN102878719B (zh) * 2012-10-12 2014-08-06 天津商业大学 具有机械振动辅助传热传质功能的溴化锂吸收式制冷装置
JP5795423B1 (ja) * 2014-12-19 2015-10-14 株式会社西部技研 吸収式除去・濃縮装置
JP6432462B2 (ja) * 2015-07-27 2018-12-05 アイシン精機株式会社 吸収式ヒートポンプ装置
JP6672847B2 (ja) * 2016-02-03 2020-03-25 アイシン精機株式会社 吸収式ヒートポンプ装置
JP7024317B2 (ja) * 2017-05-22 2022-02-24 株式会社アイシン 車載用吸収式ヒートポンプ装置

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Also Published As

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JP5290776B2 (ja) 2013-09-18
JPWO2008099726A1 (ja) 2010-05-27
CN101663545B (zh) 2012-03-21
EP2123997A1 (en) 2009-11-25
CN101663545A (zh) 2010-03-03
WO2008099726A1 (ja) 2008-08-21

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