EP2312241B1 - Kältezyklusvorrichtung und klimaanlage - Google Patents
Kältezyklusvorrichtung und klimaanlage Download PDFInfo
- Publication number
- EP2312241B1 EP2312241B1 EP09770035.5A EP09770035A EP2312241B1 EP 2312241 B1 EP2312241 B1 EP 2312241B1 EP 09770035 A EP09770035 A EP 09770035A EP 2312241 B1 EP2312241 B1 EP 2312241B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- refrigerant
- air
- refrigerating cycle
- cycle device
- adsorbing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004378 air conditioning Methods 0.000 title 1
- 239000003507 refrigerant Substances 0.000 claims description 210
- 239000007788 liquid Substances 0.000 claims description 32
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 23
- 239000007789 gas Substances 0.000 claims description 22
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 14
- 239000001301 oxygen Substances 0.000 claims description 14
- 229910052760 oxygen Inorganic materials 0.000 claims description 14
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000002808 molecular sieve Substances 0.000 claims description 8
- 239000010457 zeolite Substances 0.000 claims description 8
- 229910021536 Zeolite Inorganic materials 0.000 claims description 7
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- FXRLMCRCYDHQFW-UHFFFAOYSA-N 2,3,3,3-tetrafluoropropene Chemical compound FC(=C)C(F)(F)F FXRLMCRCYDHQFW-UHFFFAOYSA-N 0.000 claims description 6
- 238000001704 evaporation Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 32
- 238000010586 diagram Methods 0.000 description 17
- 239000000126 substance Substances 0.000 description 15
- 239000003921 oil Substances 0.000 description 14
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 13
- 238000010792 warming Methods 0.000 description 10
- 238000009434 installation Methods 0.000 description 9
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 8
- 239000012535 impurity Substances 0.000 description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 description 7
- 239000001569 carbon dioxide Substances 0.000 description 7
- 230000006866 deterioration Effects 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000003463 adsorbent Substances 0.000 description 4
- PGJHURKAWUJHLJ-UHFFFAOYSA-N 1,1,2,3-tetrafluoroprop-1-ene Chemical compound FCC(F)=C(F)F PGJHURKAWUJHLJ-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 230000005514 two-phase flow Effects 0.000 description 3
- -1 Hydro Fluoro Olefin Chemical class 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000010726 refrigerant oil Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
Images
Classifications
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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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/003—Filters
-
- 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
- F25B2500/00—Problems to be solved
- F25B2500/01—Geometry problems, e.g. for reducing size
-
- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/04—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for withdrawing non-condensible gases
- F25B43/043—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for withdrawing non-condensible gases for compression type systems
Definitions
- the present invention relates to a refrigerating cycle device such as an air conditioner, a water heater and the like. Particularly, reliability of a refrigerating cycle device is improved by providing removing means for removing substances that react with an unstable refrigerant.
- a refrigerating cycle device using a refrigerating cycle such as an air conditioner, a freezer, a water heater and the like
- a compressor a condenser (heat exchanger), an expansion valve, and an evaporator (heat exchanger) are connected by piping so as to constitute a refrigerant circuit through which a filled refrigerant is circulated.
- the refrigerant compressed in the compressor becomes a high-temperature and high-pressure gas refrigerant and is fed into the condenser.
- the refrigerant having been fed into the condenser is liquefied by emitting heat through heat exchange with a heat-exchange target.
- the liquefied refrigerant is decompressed by the expansion valve and turned into a gas-liquid two-phase flow state and gasified (evaporated) by absorbing heat through heat exchange in the evaporator, returned to the compressor again and circulated.
- GWP small global warming coefficient
- CO 2 carbon dioxide
- R410A refrigerant refrigerant circuit
- an HFO (Hydro Fluoro Olefin) refrigerant (hereinafter referred to as an HFO refrigerant) is proposed.
- the HFO refrigerant has a small global warming coefficient and better energy efficiency than carbon dioxide and is an effective refrigerant from a viewpoint of a global environment. Also, since its boiling point is high and pressure of the refrigerant in the refrigerant circuit is low, there is no need to raise the pressure resistance. However, the HFO refrigerant has a characteristic that its chemical reactivity is high due to a double bond in an atomic bond constituting a substance (thus, the global warming coefficient gets smaller). Therefore, if impurities other than the refrigerant are present in the refrigerant circuit, the refrigerant reacts with the impurities and is deteriorated, which is a problem.
- the HFO refrigerant has a low warming coefficient and is environmentally friendly, but deterioration of the refrigerant itself should be prevented in order to be used as a refrigerant in a vapor compression refrigerating cycle, while reliability is ensured. Therefore, in order to prevent circulation of an oxygen component in the refrigerant circuit, a method of providing oxygen adsorbing means for adsorbing oxygen is disclosed (See Patent Document 1, for example).
- JP H07 159004A discloses a refrigerating cycle device which uses an adsorbent for adsorbing air in the refrigerating cycle of the outdoor unit.
- the adsorbent is a material which can adsorb two or more of gases such as moisture, oxygen and carbon dioxide in the air which is filled into a vessel forming a part of the refrigerating cycle.
- JP H07 294065A relates to a refrigeration system which uses a first filter filled with adsorbent to remove water and methane, and a second filter filled with adsorbent to remove non-condensable gases such as air.
- JP H04 302967 relates to a refrigeration system using zeolites having a pore size between 0.3 and 0.4 nm to remove water from a refrigerant, yet uses another method to remove oxygen.
- the present invention was made in order to solve the above problems and has an object to obtain a refrigerant cycle device or the like that can prevent impurities contained in a refrigerant circuit from circulating in the refrigerant circuit and can effectively use the HFO refrigerant or the like.
- a refrigerating cycle according to the invention is defined in claim 1.
- the air adsorbing means is provided on the refrigerant circuit so as to adsorb an oxygen molecule and a nitrogen molecule in the air of the refrigerant circuit, the oxygen molecule and the nitrogen molecule to become impurities can be prevented from circulating. Therefore, when the HFO-1234yf refrigerant which has double bond and is chemically unstable is circulated through the refrigerant circuit, the HFO refrigerant and the air can be prevented from deteriorating or the like by chemical reaction or the like, performances of the refrigerating cycle device can be maintained for a long time, and moreover, reliability can be ensured.
- HFO refrigerant tetrafluoropropylene (HFO-1234yf) is used as a refrigerant at this time has a global warming coefficient equivalent to that of carbon dioxide, which is a natural refrigerant, for example, and is a so-called nonflon refrigerant, the refrigerant is suitable from a viewpoint of the environment.
- Fig. 1 is a diagram illustrating a basic configuration of a refrigerating cycle device according to Embodiment 1 of the present invention.
- Arrows 100 in Fig. 1 indicate a direction along which a refrigerant flows.
- the refrigerating cycle device has a compressor 1, a condenser 2, air adsorbing means 3, a throttle device (expansion valve) 4, and an evaporator 5.
- Each device (element part) is connected to each other by piping so as to constitute a refrigerant circuit.
- a refrigerant to be circulated is sealed.
- the compressor 1 sucks the refrigerant to be circulated through the refrigerant circuit and compresses and pressurizes it.
- the condenser 2 performs heat exchange between a gas state refrigerant discharged by the compressor 1 (hereinafter referred to as a gas refrigerant) and a heat-exchange target and emits a heat quantity in the refrigerant so as to heat the heat-exchange target.
- the air adsorbing means 3 is means for adsorbing air in the refrigerant circuit.
- a vacuuming process is provided before the refrigerant is filled in the refrigerating cycle device in order to vacuum the inside of the refrigerating cycle device.
- an air amount in the refrigerating cycle device cannot be brought to zero (fully vacuum state).
- approximately 130 to 250 Pa is a limit.
- air is present all the time as an impurity in the refrigerant circuit of the refrigerating cycle device.
- a presence ratio between nitrogen and oxygen in the air is 8 : 2, and oxygen and nitrogen (particularly nitrogen) occupy the most part.
- the air adsorbing means 3 according to the invention is supposed to adsorb oxygen molecules and nitrogen molecules. The air adsorbing means 3 will be described later in detail.
- the throttle device 4 adjusts a flow rate of the refrigerant and lowers the pressure of the refrigerant (decompression).
- the evaporator 5 performs heat exchange between a gas-liquid two-phase refrigerant whose pressure is lowered by the throttle device 4 (refrigerant in which a gas refrigerant and a liquid-state refrigerant (hereinafter referred to as a liquid refrigerant) coexist) and a heat-exchange target, has a heat quantity absorbed by the refrigerant, evaporated, and gasified.
- the heat-exchange target is cooled.
- a level of the pressure in the refrigerant circuit is not determined by a relationship with a pressure to be a reference but is indicated as a relative pressure determined by compression of the compressor 1, refrigerant flow-rate control of the throttle device 4 and the like. The same applies to a degree of the temperature.
- the refrigerant having been compressed and pressurized by the compressor 1 passes through the piping and is fed into the condenser 2.
- the refrigerant having passed through the condenser 2 is condensed and liquefied. At this time, the refrigerant emits heat, by which the heat-exchange target is heated.
- the liquefied refrigerant passes through the air adsorbing means 3 and is fed into the throttle device 4.
- the liquid-state refrigerant is decompressed while passing through the throttle device 4, becomes a refrigerant in the gas-liquid two-phase flow state (hereinafter referred to as a gas-liquid two-phase refrigerant) and is fed into the evaporator 5.
- the gas-liquid two-phase flow state refrigerant having passed through the evaporator 5 is evaporated and gasified.
- the gasified refrigerant is sucked into the compressor 1 again.
- Figs. 2 are diagrams illustrating a configuration of the air adsorbing means 3. Subsequently, a configuration or the like of the air adsorbing means 3, which is a point of the present invention, will be described.
- Fig. 2A illustrates a sectional view of the air adsorbing means 3
- Fig. 2B illustrates filters (mesh) 3e, 3f, which is one of constituent elements of the air adsorbing means 3. As shown in Fig.
- the air adsorbing means 3 in this Embodiment is configured by a casing (container) 3a, an adsorbing material portion 3b filled with an adsorbing material, an inflow pipe 3c, an outflow pipe 3d, and the filters 3e, 3f.
- the configuration is not limited to this but means can be added or the like as necessary.
- the refrigerant having passed through the condenser 2 flows in through the inflow pipe 3c of the air adsorbing means 3, passes through the filter 3e and flows into the adsorbing material portion 3b.
- the filter 3e traps a foreign substance inflowing with the refrigerant and prevents adhesion of the foreign substance to the adsorbing material in the adsorbing material portion 3b.
- the adsorbing material of the adsorbing material portion 3b adsorbs only an air component (oxygen and nitrogen) contained in the refrigerant.
- the refrigerant whose air component has been adsorbed flows out of the outflow pipe 3d through the filter 3f and is fed into the throttle device 4.
- the adsorbing material in the adsorbing material portion 3b might be pulverized. If the pulverized adsorbing material flows out of the air adsorbing means 3 and circulates with the refrigerant in the refrigerant circuit, occlusion might be induced in members such as a capillary tube or the throttle device 4, which is a narrow flow passage. Also, it might cause a failure of the compressor 1. Then, the filter 3f is provided so that the pulverized adsorbing material is trapped and prevented from flowing out of the air adsorbing means 3. Therefore, the filer 3f is an important component in ensuring reliability of the air adsorbing means 3 and thus, the refrigerating cycle device.
- zeolite which has excellent chemical stability and can strongly adsorb a substance with a low concentration (low partial pressure) is used.
- a mechanism for adsorbing air by zeolite is adsorption by trapping an oxygen molecule and a nitrogen molecule in a manner of a molecular sieve.
- a pore size of zeolite (here, it is supposed to be a diameter) should be not smaller than a diameter according to the air component and smaller than a diameter according to the HFO refrigerant.
- a size of a nitrogen molecule which is a major component of the air, is approximately 0.36 nm (3.6 angstrom) and a size of an oxygen molecule is approximately 0.34 nm (3.4 angstrom).
- the nitrogen molecule is larger than the oxygen molecule and cannot be removed.
- a dryer which has been used is intended to adsorb moisture, and a pore size of the adsorbing material is in the vicinity of 0.29 nm (2.9 angstrom) (the size of a water molecule is 2.8 angstrom), therefore the nitrogen molecule and the oxygen molecule cannot be removed. From the above, the pore size of the adsorbing material needs to be approximately 0.36 nm in accordance with the nitrogen molecule.
- the molecular size of the HFO-1234yf refrigerant is approximately 0.40 nm.
- a pore size dp of the adsorbing material for removing oxygen and nitrogen is set at 0.36 nm ⁇ dp ⁇ 0.40 nm, the air component can be selectively adsorbed.
- zeolite is used as the adsorbing material, but in refrigerating cycle devices not part of the present invention the adsorbing material is not limited only to zeolite.
- any adsorbing material such as silica gel, activated coal, mesoporous silica and the like, for example, can achieve the similar effect as long as it has a pore size of 0.36 nm ⁇ dp ⁇ 0.40 nm as mentioned above.
- FIG. 1 An installation position of the air adsorbing means 3 will be described below.
- Fig. 1 it is installed in a high-pressure liquid line (between the condenser 2 and the throttle device 4.
- a liquid refrigerant on the high-pressure side flows in the refrigerant circuit) on a downstream side of the condenser 2.
- the refrigerant When passing through the air adsorbing means 3, for example, the refrigerant generates pressure loss therein. The pressure loss generated in the refrigerant deteriorates (operation) efficiency of the refrigerating cycle device.
- the air adsorbing means 3 is preferably installed in the high-pressure liquid line basically from a viewpoint of efficiency of the refrigerating cycle device.
- Fig. 3 is a diagram illustrating an example of the installation position of the air adsorbing means 3.
- the air adsorbing means 3 is installed in a low-pressure gas line (between the evaporator 5 and an intake side of the compressor 1.
- a gas refrigerant on the low-pressure side flows in the refrigerant circuit) on the downstream side of the evaporator 5.
- an oil separator 7 separates a lubricant discharged from the compressor 1 with the refrigerant from the refrigerant.
- a capillary tube 9 adjusts a flow rate when the separated lubricant is returned to the compressor 1.
- the oil separator 7 and the capillary tube 9 are connected to the intake side and the discharge side of the compressor 1 in parallel with the refrigerant circuit so as to constitute an oil return circuit 10.
- the air adsorbing means 3 is installed in the high-pressure liquid line as in the above-mentioned Fig. 1 , the pressure loss in the air adsorbing means 3 causes generation of air bubbles in the refrigerant (a part of the refrigerant is evaporated), and the refrigerant is brought into the gas-liquid two-phase state in a stage prior to an inflow into the throttle device 4. If the gas-liquid two-phase refrigerant flows into the throttle device 4, a pressure is violently fluctuated in a short time, and a hunting phenomenon or the like might occur in order to follow the movement, which might make control unstable.
- the air adsorbing means 3 is preferably disposed in the low-pressure gas line depending on the cases.
- the adsorbing material exerts better adsorbing performance if the temperature is lower in general, an amount of the adsorbing material can be reduced under a low-temperature environment if the same amount of air is to be adsorbed, for example.
- the air adsorbing means 3 by installing the air adsorbing means 3 in the low-pressure gas line through which the low-temperature refrigerant passes, the size of the air adsorbing means 3 can be reduced, and costs relating to the air adsorbing means 3 can be declined. In this way, it is only necessary that the air adsorbing means 3 is simply provided on the low-pressure gas line, but the pressure loss generated in the air adsorbing means 3 might give too large impact on the efficiency of the refrigerating cycle device.
- a bypass pipe for bypassing a part of the refrigerant is provided in the low-pressure gas line so as to form a bypass circuit 6, and the air adsorbing means 3 is disposed in the bypass circuit 6.
- the air adsorbing means 3 is preferably provided at a position on the upstream side from the oil return circuit 10 from the oil separator. Even in the low-pressure gas line, on the downstream of the oil return circuit, an oil amount is large, and the oil adheres to the adsorbing material, which deteriorates performances of the adsorbing material, and the means is preferably installed on the upstream from a merger point with the oil return circuit.
- Fig. 4 is a diagram illustrating another example of the installation position of the air adsorbing means 3.
- the air adsorbing means 3 is installed in the oil return circuit 10.
- the air contained in refrigerator oil is adsorbed by the air adsorbing means 3.
- the pressure loss generated in the air adsorbing means 3 does not affect the refrigerant circuit, and efficiency and controllability of the refrigerating cycle device is not affected.
- the refrigerating cycle device of Embodiment 1 by using the HFO refrigerant as a refrigerant circulating through the refrigerant circuit, since it is a so-called non-flon refrigerant having the global warming coefficient equivalent to that of carbon dioxide, which is a natural refrigerant, the refrigerating cycle device friendly to the global environment can be obtained. Also, since the air adsorbing means 3 is provided in the refrigerant circuit so that the oxygen molecule and the nitrogen molecule in the air remaining in the refrigerant circuit even after vacuuming, for example, are trapped, the oxygen molecule and the nitrogen molecule to become impurities can be prevented from circulating.
- the air adsorbing means 3 is installed in the high-pressure liquid line through which the high-pressure liquid refrigerant flows, the influence of the pressure loss due to the air adsorbing means 3 can be reduced to an negligible level, and the efficiency of the refrigerating cycle device can be prevented from being affected.
- the means 3 in the low-pressure gas line through which the low-pressure gas refrigerant flows, the low-temperature refrigerant can pass through the air adsorbing means 3, adsorbing performance is improved, and the size of the air adsorbing means 3 can be reduced in installation. Since the bypass circuit 6 is provided so that a part of the gas refrigerant passes through the air adsorbing means 3, the influence of the pressure loss of the air adsorbing means 3 in the low-pressure gas line can be suppressed.
- Fig. 5 is a diagram illustrating a configuration of a refrigerating cycle device according to Embodiment 2 which describes a refrigerating cycle not part of the invention.
- Air separating / removing means 11 is means for separating the refrigerant and air using a density difference between the liquid refrigerant and air.
- the air separating / removing means 11 needs to be installed where the refrigerant is in the liquid state.
- the air separating / removing means 11 is installed in a high-pressure liquid line between the condenser 2 and the throttle device 4.
- the upper side is an upward direction in the vertical direction
- the lower side is a downward direction in the vertical direction.
- Fig. 6 is a diagram illustrating a section of the air separating / removing means 11.
- the air separating / removing means 11 which is not part of the invention has an air vent valve 11a, an air vent pipe 11b, a container 11c, a refrigerant inflow pipe 11d, and a refrigerant outflow pipe 11e.
- the air vent valve 11a and the air vent pipe 11b are located on the upper side from the refrigerant inflow pipe 11d and the refrigerant outflow pipe 11e in the vertical direction.
- a density of the liquid refrigerant in the HFO refrigerant is approximately 800 to 1100 [kg/m 3 ], for example.
- the density of air is approximately 1.2 [kg/m 3 ]. Since the air and the liquid refrigerant has a large density difference as above, the liquid refrigerant flowing in through the refrigerant inflow pipe 11d located at the lower part of the container 11c is collected as a liquid refrigerant 12b in the container 11c, and a part of the refrigerant flows out of the refrigerant outflow pipe 11e. The air flowing in together with the liquid refrigerant is collected as air 12a in the upper part of the container 11c.
- the refrigerant outflow pipe 11e protrudes inward from the lower part of the container 11c, even if a foreign substance heavier than the refrigerant is contained in the refrigerant for some reason, for example, it does not flow out of the refrigerant outflow pipe 11e but can be collected in the lower part of the container 11c, and removal of the foreign substance can be realized.
- Fig. 7 is a diagram illustrating an air conditioner not part of the invention using the air separating / removing means 11.
- the air conditioner in Fig. 7 has an outdoor unit 200a and an indoor unit 200b.
- the outdoor unit 200a is provided with a compressor 201, a flow-passage switching valve 202, an outdoor-side heat exchanger 203, a throttle device 204, and air separating / removing means 11.
- the indoor unit 200b is provided with an indoor-side heat exchanger 205.
- the compressor 201 and the throttle device 204 perform operations similar to those of the compressor 1 and the throttle device 4 described above, respectively.
- the flow-passage switching valve 202 switches a flow of the refrigerant in the refrigerant circuit between a cooling operation and a heating operation.
- the outdoor-side heat exchanger 203 functions as the condenser 2 in Embodiment 1 in the cooling operation and functions as the evaporator 5 in the heating operation to perform heat exchange between the air and the refrigerant.
- the indoor-side heat exchanger 205 functions, to the contrary to the outdoor-side heat exchanger 203, as the evaporator 5 in the cooling operation and functions as the condenser 2 in the heating operation to perform heat exchange between the indoor air and the refrigerant.
- control means for controlling operations of each means is provided.
- a fan for performing heat exchange with the refrigerant efficiently may be provided in the outdoor-side heat exchanger 203 and the indoor-side heat exchanger 205.
- tetrafluoropropene (tetrafluoropropylene) refrigerant which is one type of HFO (hydrofluoroolefin) refrigerant, is used.
- the liquefied refrigerant passes through the air separating / removing means 11 and flows into the throttle device 204.
- the liquefied refrigerant is decompressed by passing through the throttle device 204 so as to become a gas-liquid two-phase refrigerant, flows into the indoor unit 200b through the piping and is fed into the indoor-side heat exchanger 205.
- the gas-liquid two-phase refrigerant having flown into the indoor-side heat exchanger 205 is heat-exchanged with the indoor air and evaporated by absorbing heat from the air and gasified.
- the gasified refrigerant is sucked by the compressor 201 again.
- the refrigerant flow is reversed by the flow-passage switching valve 202 so that the high-temperature and high-pressure refrigerant gas flows into the indoor unit 200b.
- the indoor-side heat exchanger 205 functions as the condenser, while the outdoor-side heat exchanger 203 functions as the evaporator.
- the air separating / removing means 11 provided in the air conditioner in Fig. 7 will be described. If the portions other than the air separating / removing means 11 are located at the highest position (position to become the uppermost part) in the outdoor unit 200a, for example, it is likely that air is also collected in that portion and does not move. Then, the air separating / removing means 11 is installed on the highest piping in the outdoor unit 200a.
- air-purge is most preferably performed by the air separating / removing means 11 in the cooling operation during a trial operation.
- the air-purge is performed in the trial operation since the earlier the air is removed, the smaller a degree of deterioration of the refrigerant can be.
- the indoor-side heat exchanger 205 becomes the condenser, and the liquid refrigerant is present in the indoor-side heat exchanger 205.
- the indoor unit 200b is installed at a position higher than the outdoor unit 200a, the refrigerant and the air are separated in the indoor unit 200b, and thus, air is not collected in the air separating / removing means 11.
- the outdoor unit 200a is installed at a position higher than the indoor unit 200b such as a roof top, by installing the air separating / removing means 11 at a position in front of the throttle device 4, for example, the air can be separated even in the heating operation.
- Figs. 8 are diagrams illustrating a case not part of the invention in which the air separating / removing means 11 is installed in the indoor unit 200b.
- the indoor unit 200b might be installed at a position higher than the outdoor unit 200a in many cases. Also, the trial operation might be performed in the winter in many cases. Taking such situations into consideration, as shown in Fig. 8A , the air separating / removing means 11 may be provided in the indoor unit 200b.
- the air separating / removing means 11 is installed on the piping where the refrigerant returns to the outdoor unit 200a. If the indoor unit 200b is located at a position higher than the outdoor unit 200a, the air separating / removing means 11 might be located below the indoor-side heat exchanger 205. Thus, as shown in Fig. 8B , the piping is raised so that it is located above the indoor-side heat exchanger 205 so that the air collected in the piping is purged by the air separating / removing means 11 configured by the air vent valve 11a and the air vent pipe 11b at the highest position.
- the configuration of the air separating / removing means 11 as in Fig. 8B can be configured by the outdoor unit 200a.
- the air separating / removing means 11 having the air vent valve 11a and the air vent pipe 11b is provided on the refrigerant circuit in order to remove the air remaining in the refrigerant circuit even after vacuuming from the refrigerant circuit, for example, the air to become impurities can be prevented from circulating.
- the HFO refrigerant and the air can be prevented from deteriorating or the like by chemical reaction or the like.
- performances of the refrigerating cycle device can be maintained for a long time, and moreover, reliability can be ensured.
- the air separating / removing means 11 is provided in a portion through which the liquid refrigerant flows, the refrigerant and the air can be reliably separated on the basis of a difference in density between the liquid refrigerant and the air. Also, by providing the air separating / removing means 11 at the highest position in the refrigerant circuit, the air can be collected in the air separating / removing means 11 and separated efficiently.
- the cases in which the air adsorbing means 3 according to the invention and the air separating / removing means 11 which are not part of the invention are installed singularly in the refrigerant circuit (refrigerating cycle device) were shown, but the number of installation is not limited to one. Particularly, the air separating / removing means 11 may be provided at plural spots where air can be easily collected.
- Embodiment 2 which is not part of the invention, but not limited to that, the air conditioner provided with the air adsorbing means 3 described in Embodiment 1 according to the invention can also be realized.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Other Air-Conditioning Systems (AREA)
Claims (8)
- Kältekreislaufeinrichtung, wobei
ein Verdichter (1) zum Verdichten eines HFO-1234yf enthaltenden Kältemittels;
ein Kondensator (2) zum Kondensieren des Kältemittels durch Wärmeaustausch;
ein Expansionsmittel zum Dekomprimieren des kondensierten Kältemittels; ein Verdampfer (5) zum Verdampfen des Kältemittels durch Wärmeaustausch zwischen dem dekomprimierten Kältemittel und Luft; und
ein Molekularsieb (3), adsorbierend Sauerstoff und Stickstoff, verbunden sind durch Leitungen, um einen Kältemittelkreislauf zu bilden, durch den das HFO-1234yf enthaltende Kältemittel zirkuliert wird, dadurch gekennzeichnet, dass das Molekularsieb (3) ein Zeolith ist, aufweisend eine Porengröße > 0,36 nm und < 0,40 nm. - Kältekreislaufeinrichtung nach Anspruch 1, wobei das Molekularsieb (3) in einem Abschnitt angeordnet ist, wo ein Kältemittel in einem flüssigen Zustand mit hohem Druck im Kältemittelkreislauf strömt.
- Kältekreislaufeinrichtung nach Anspruch 1, wobei das Molekularsieb (3) in einem Abschnitt angeordnet ist, wo ein Kältemittel in einem gasförmigen Zustand mit niedrigem Druck im Kältemittelkreislauf strömt.
- Kältekreislaufeinrichtung nach Anspruch 3, wobei ein Bypasskreislauf (6) zum Aufweisen eines Teils des Kältemittels, der das Molekularsieb (3) passiert, in einem Abschnitt angeordnet ist, wo das Kältemittel in einem gasförmigen Zustand mit niedrigem Druck im Kältemittelkreislauf strömt.
- Klimaanlage, wobei ein Zielraum durch die Kältekreislaufeinrichtung nach einem der Ansprüche 1 bis 4 gekühlt/erwärmt wird.
- Klimaanlage, wobei jedes die Kältekreislaufeinrichtung nach einem der Ansprüche 1 bis 5 bildende Mittel ausgestattet ist mit:einer einzigen oder einer Vielzahl von Inneneinheiten (200b), jeweils aufweisend einen Innenwärmetauscher (205), der als der Kondensator oder der Verdampfer wirkt, wobei der einzige oder die Vielzahl von Inneneinheiten (200b) Kühlen/Erwärmen eines zu klimatisierenden Raums durchführt/durchführen; undeiner einzigen oder einer Vielzahl von Außeneinheiten (200a), jeweils aufweisend den Verdichter (201), das Expansionsmittel (204) und einen Außenwärmetauscher (203), der als der Kondensator oder der Verdampfer wirkt, wobei die einzige oder die Vielzahl von Außeneinheiten (200a) eine Wärmemenge zuführen, um die Inneneinheit zu veranlassen, Kühlen/Erwärmen durch Zirkulieren des Kältemittels durchzuführen.
- Klimaanlage nach Anspruch 6, wobei die Außeneinheit (200a) mit dem Molekularsieb (3) ausgestattet ist.
- Klimaanlage nach Anspruch 7, wobei die Inneneinheit (200b) mit dem Molekularsieb (3) ausgestattet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008164655 | 2008-06-24 | ||
PCT/JP2009/060790 WO2009157325A1 (ja) | 2008-06-24 | 2009-06-12 | 冷凍サイクル装置及び空気調和装置 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2312241A1 EP2312241A1 (de) | 2011-04-20 |
EP2312241A4 EP2312241A4 (de) | 2016-02-24 |
EP2312241B1 true EP2312241B1 (de) | 2019-11-27 |
Family
ID=41444393
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Application Number | Title | Priority Date | Filing Date |
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EP09770035.5A Active EP2312241B1 (de) | 2008-06-24 | 2009-06-12 | Kältezyklusvorrichtung und klimaanlage |
Country Status (5)
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US (1) | US20110079040A1 (de) |
EP (1) | EP2312241B1 (de) |
JP (1) | JPWO2009157325A1 (de) |
CN (1) | CN102077040A (de) |
WO (1) | WO2009157325A1 (de) |
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JP6377524B2 (ja) | 2012-04-27 | 2018-08-22 | Agc株式会社 | テトラフルオロプロペンの保存方法およびテトラフルオロプロペンの保存容器 |
CN110041163A (zh) | 2013-07-16 | 2019-07-23 | Agc株式会社 | 三氟乙烯的保存方法 |
WO2015060407A1 (ja) * | 2013-10-25 | 2015-04-30 | 三菱重工業株式会社 | 冷媒循環装置、冷媒循環方法および酸抑制方法 |
JP6392052B2 (ja) | 2014-09-25 | 2018-09-19 | 三菱重工サーマルシステムズ株式会社 | 抽気装置の制御装置及び制御方法 |
EP3306225A4 (de) * | 2015-05-28 | 2019-01-23 | Hitachi-Johnson Controls Air Conditioning, Inc. | Kältekreislaufvorrichtung |
JPWO2017122517A1 (ja) * | 2016-01-12 | 2018-11-22 | Agc株式会社 | 冷凍サイクル装置及び熱サイクルシステム |
JP6758080B2 (ja) * | 2016-04-26 | 2020-09-23 | 日立ジョンソンコントロールズ空調株式会社 | 冷凍サイクル装置 |
DE102016215985A1 (de) | 2016-08-25 | 2018-03-01 | Leybold Gmbh | Kältemaschine |
JP6323540B1 (ja) | 2016-11-28 | 2018-05-16 | セントラル硝子株式会社 | ドライエッチング剤組成物及びドライエッチング方法 |
JP6524990B2 (ja) * | 2016-12-09 | 2019-06-05 | ダイキン工業株式会社 | 熱搬送装置及びそれを用いた熱搬送方法 |
JP6766029B2 (ja) * | 2016-12-13 | 2020-10-07 | ダイキン工業株式会社 | 熱搬送装置及びそれを用いた熱搬送方法 |
US20190137040A1 (en) * | 2017-11-08 | 2019-05-09 | Delta Design, Inc. | System and method for liquid nitrogen recycling |
JP7192347B2 (ja) * | 2018-09-21 | 2022-12-20 | 株式会社富士通ゼネラル | 冷凍サイクル装置 |
US20200149791A1 (en) * | 2018-11-09 | 2020-05-14 | Carrier Corporation | Low pressure refrigeration system with membrane purge |
EP3891448A1 (de) | 2018-12-03 | 2021-10-13 | Carrier Corporation | Verbessertes kühlspülsystem |
CN112334720A (zh) * | 2018-12-03 | 2021-02-05 | 开利公司 | 增强的制冷净化系统 |
WO2020117580A1 (en) | 2018-12-03 | 2020-06-11 | Carrier Corporation | Membrane purge system |
CN112334721A (zh) | 2018-12-03 | 2021-02-05 | 开利公司 | 增强制冷吹扫系统 |
CN113841016A (zh) * | 2019-09-06 | 2021-12-24 | 东芝开利株式会社 | 制冷循环装置 |
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- 2009-06-12 EP EP09770035.5A patent/EP2312241B1/de active Active
- 2009-06-12 JP JP2010517897A patent/JPWO2009157325A1/ja active Pending
- 2009-06-12 CN CN2009801238387A patent/CN102077040A/zh active Pending
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Also Published As
Publication number | Publication date |
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JPWO2009157325A1 (ja) | 2011-12-08 |
EP2312241A4 (de) | 2016-02-24 |
US20110079040A1 (en) | 2011-04-07 |
CN102077040A (zh) | 2011-05-25 |
WO2009157325A1 (ja) | 2009-12-30 |
EP2312241A1 (de) | 2011-04-20 |
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