WO2006087902A1 - 冷凍装置の組み立て方法 - Google Patents
冷凍装置の組み立て方法 Download PDFInfo
- Publication number
- WO2006087902A1 WO2006087902A1 PCT/JP2006/301531 JP2006301531W WO2006087902A1 WO 2006087902 A1 WO2006087902 A1 WO 2006087902A1 JP 2006301531 W JP2006301531 W JP 2006301531W WO 2006087902 A1 WO2006087902 A1 WO 2006087902A1
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- WO
- WIPO (PCT)
- Prior art keywords
- refrigerant
- pipe
- circuit
- compressor
- communication pipe
- Prior art date
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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
- F25B49/00—Arrangement or mounting of control or safety devices
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/26—Refrigerant piping
- F24F1/32—Refrigerant piping for connecting the separate outdoor units to indoor units
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/26—Refrigerant piping
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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
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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
- F25B45/00—Arrangements for charging or discharging refrigerant
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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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/53113—Heat exchanger
Definitions
- the present invention relates to a method of assembling a refrigeration apparatus using a connecting pipe formed by joining a plurality of pipes by brazing.
- a refrigeration apparatus including a refrigerant circuit that performs a vapor compression refrigeration cycle by circulating refrigerant is known.
- a refrigerant circuit is configured by connecting an indoor unit including a use side circuit and an outdoor unit including a heat source side circuit by a communication pipe (for example, Patent Document 1).
- This type of refrigeration system is assembled by bringing indoor units and outdoor units manufactured in a factory into the installation site.
- the indoor unit and outdoor unit are installed at their respective installation locations. Then, both units are connected by connecting piping to form a refrigerant circuit.
- Patent Document 1 Japanese Patent Laid-Open No. 2003-314909
- the joint portion of the pipe is heated with a gas burner or the like in order to melt the brazing.
- the heated part and its surroundings become hot, and if there is oxygen in the vicinity, the surface of the heated part is oxidized and an oxide is formed there.
- oxides adhere to the inner surface of the connecting pipe! / The oxide will be peeled off by the flow of the refrigerant and the compressor will fail. This may cause trouble such as refrigerant leakage from the tension valve.
- the present invention has been made in view of such a point, and an object of the present invention is to simplify a refrigeration apparatus using a connecting pipe formed by joining a plurality of pipes by brazing. Is to provide a simple assembly method.
- the first invention includes a heat source side circuit (11) having a compressor (21) and a heat source side heat exchanger (24), and a utilization side circuit (12) having a utilization side heat exchanger (33).
- a method for assembling a refrigeration apparatus comprising Then, a plurality of pipes (46, 46,...) Are joined together by brazing to form a connection pipe (45), and the heat source side circuit (11) and the use side circuit (1 2) are connected by the connecting pipe (45) to form a refrigerant circuit (10), and the compressor (21) is operated after completion of the refrigerant circuit configuration step to operate the refrigerant circuit.
- a second invention is the above-described first invention, wherein the oxide is collected in the communication pipe cleaning step using the collection member (40) through which the refrigerant passes only in the communication pipe cleaning process. .
- the refrigerant is circulated in a turbulent state in the refrigerant circuit (10) in the communication pipe cleaning step.
- the refrigerant discharged from the compressor (21) in the communication pipe cleaning step is the heat source heat exchange (24 ) Above
- the refrigerant is circulated so as to return to the compressor (21) through the refrigerant circuit (10) in the order of the use side heat exchanger (33).
- the plurality of pipes (46, 46,...) are joined together by brazing in the above-described connecting pipe constituting step, thereby forming the connecting pipe (45).
- the pipes (46, 46) are joined together by the brazing iron, nitrogen substitution is not performed, in which nitrogen is fed into the pipes (46, 46), unlike the prior art.
- the pipe (46) is heated at the time of brazing, the inner surface of the pipe (46) is oxidized, so that the inner surface of the constructed connecting pipe (45) is in an oxide-attached state.
- the communication pipe cleaning step is performed after the refrigerant circuit constituting step is completed.
- the compressor (21) is operated, and the refrigerant circulates in the refrigerant circuit (10).
- the refrigerant flows through the connecting pipe (45)
- a shearing force acts on the oxide adhering to the inner surface of the connecting pipe (45), so that the oxide is peeled off.
- the peeled oxide is swept away by the refrigerant and collected upstream of the compressor (21) in the heat source side circuit (11).
- the collecting member (40) is used to collect the oxide. Through this collecting member (40), the refrigerant passes only in the communication pipe cleaning step. Therefore, when the assembly of the refrigeration apparatus (5) is completed, the refrigerant does not flow through the collection member (40).
- the refrigerant in the communication pipe cleaning step, the refrigerant circulates in a turbulent state in the refrigerant circuit (10).
- the refrigerant velocity In order for the refrigerant flow to become turbulent, the refrigerant velocity must be somewhat high. That is, according to the present invention, in the communication pipe cleaning step, the refrigerant is circulated in the refrigerant circuit (10) at a relatively large flow rate such that the refrigerant enters a turbulent state.
- the gas refrigerant discharged from the compressor (21) is condensed in the heat source heat exchanger (24) and then becomes liquid refrigerant and flows into the use side heat exchanger (33). After evaporating in the use side heat exchanger (33), it becomes a gas refrigerant and returns to the heat source side circuit (11).
- the refrigerant flows in the direction of the heat source side circuit (11) toward the user side circuit (12)
- the refrigerant flows through the liquid side communication pipe (45a), and the refrigerant flows in the user side circuit (12) force.
- the gas side connecting pipe (45b) When flowing toward (11), circulate through the gas side connecting pipe (45b).
- gas side communication piping (45b) Is thicker than the liquid side communication pipe (45a), and therefore more oxide is formed during brazing than the liquid side communication pipe (45a).
- the gas side communication pipe (45b) in which more oxides are formed during brazing is provided on the return side where the refrigerant flows toward the use side circuit (12) and the heat source side circuit (11). It is connected piping (45).
- the acid pipe although the acid oxide adheres to the inner surface of the communication pipe (45) in the communication pipe configuration step, the acid pipe also removes the force of the communication pipe (45) in the communication pipe cleaning step. To be collected. For this reason, even if the refrigeration system (5) is operated after assembly, there is almost no oxide in the communication pipe (45), and the compressor (21 ) And expansion valve (32). Even if the number of brazing points is large, the connecting pipe (45) is in a state where almost no oxides are attached to the connecting pipe (45) by performing the above-mentioned connecting pipe cleaning process once. As in the conventional method, the amount of work to prevent troubles due to oxides does not increase in proportion to the brazing point. Therefore, it is possible to eliminate the trouble of the refrigeration system (5) due to the acid oxide formed at the time of assembly, and to omit nitrogen substitution to send nitrogen into the pipe (46, 46) during brazing. (5) The number of assembly steps can be reduced.
- the second invention when the assembly of the refrigeration apparatus (5) is completed, the refrigerant does not flow through the collection member (40).
- the acid and soot collected by the collecting member (40) is surely collected by the collecting member (40) even after the assembly of the refrigeration apparatus (5). Retained. Therefore, after the assembly of the refrigeration apparatus (5), it is possible to reliably prevent the compressor (21), the expansion valve (32) and the like from being caused by the acid oxide formed during the assembly. .
- the refrigerant is circulated in the refrigerant circuit (10) at a relatively high flow rate such that the refrigerant is in a turbulent state.
- the refrigerant circulates in a turbulent flow state in the refrigerant circuit (10)
- the refrigerant flow becomes an irregular turbulent flow, coupled with the high flow velocity of the refrigerant, and the acid adhering to the communication pipe (45).
- the shear force acting on the object increases. For this reason, more acid oxide can be peeled off.
- the amount of the oxide remaining in the refrigerant circuit (10) can be reduced as much as possible. The Therefore, the communication pipe (45) can be more reliably cleaned.
- the refrigerant flows toward the heat source side circuit (11) for collecting oxides in the connecting pipe cleaning step, a large amount of oxidation occurs. It flows through the gas side connecting pipe (45b) where the object is formed.
- most of the oxide peeled off at the connecting pipe (45) passes through the user side circuit (12) and is then peeled off at the gas side connecting pipe (45b) and flows directly into the heat source side circuit (11) for compression. Collected upstream of the machine (21). Therefore, most of the peeled oxide is collected immediately after it is peeled off, so that the amount of the oxide remaining in the refrigerant circuit (10) can be reduced as much as possible.
- FIG. 1 is a schematic configuration diagram of a refrigeration apparatus assembled using the refrigeration apparatus assembly method according to the embodiment.
- FIG. 2 is a cross-sectional view of the joining portion of the connecting pipe.
- FIG. 3 is a cross-sectional view of a collection container according to an embodiment.
- FIG. 4 is a cross-sectional view of a collection container according to Modification 3 of the embodiment.
- FIG. 5 is a cross-sectional view of a collection container according to Modification 4 of the embodiment.
- FIG. 6 is a cross-sectional view of a collection container according to Modification 5 of the embodiment.
- FIG. 7 is a cross-sectional view of a collection container according to Modification 6 of the embodiment.
- FIG. 8 is a cross-sectional view of a collection container according to Modification 7 of the embodiment.
- FIG. 1 shows a schematic configuration diagram of a refrigeration apparatus (5) assembled using the refrigeration apparatus assembly method according to the present embodiment.
- This refrigeration apparatus (5) is configured as an air conditioner for adjusting the temperature of the indoor space.
- the refrigeration apparatus (5) includes one outdoor unit (20) and three indoor units (30, 30, 30).
- the number of indoor units (30) is merely an example, and may be one, two, or four or more.
- the outdoor unit (20) is provided with an outdoor circuit (11), and each indoor unit (30) is provided with an indoor circuit (12).
- an outdoor circuit (11) and three indoor circuits (12, 12, 12) are connected by a communication pipe (45) to constitute a refrigerant circuit (10).
- the connecting pipe (45) includes a liquid side connecting pipe (45a) and a gas side connecting pipe (45b).
- the gas side communication pipe (45b) has a larger diameter than the liquid side communication pipe (45a).
- Both the connecting pipes (45a, 45b) are constituted by joining a plurality of pipes (46, 46,).
- the tubes (46, 46) are joined together by brazing as shown in FIG. Brazing is a method in which the pipes (46, 46) are joined to each other by melting the solder in the gap between the joint portions of the pipes (46, 46).
- the three indoor circuits (12, 12, 12) are connected in parallel to the outdoor circuit (11). Specifically, the connecting pipe (45) connected to the outdoor circuit (11) branches into three and is connected to each indoor circuit (12). A liquid side closing valve (26) and a gas side closing valve (27) are provided at both ends of the outdoor circuit (11). The liquid side shutoff valve (26) is connected to the liquid side connecting pipe (45a), and the gas side shutoff valve (27) is connected to the gas side connecting pipe (45b)! A liquid side connector (31) and a gas side connector (34) are provided at both ends of each indoor circuit (12). Each solution A liquid side communication pipe (45a) is connected to the side connector (31), and a gas side communication pipe (45b) is connected to each gas side connector (34).
- the outdoor circuit (11) of the outdoor unit (20) constitutes a heat source side circuit.
- the compressor (21), the oil separator (22), the four-way switching valve (23), and the outdoor heat exchanger (24) are connected by a refrigerant pipe.
- the compressor (21) is a hermetic scroll compressor, and is configured as a so-called high-pressure dome type. Electric power is supplied to the compressor (21) via an inverter.
- the capacity of the compressor (21) can be changed by changing the rotation frequency of the compressor motor by changing the output frequency of the inverter.
- the outdoor heat exchanger (24) is a cross-fin type fin 'and' tube heat exchanger, and constitutes a heat source side heat exchanger.
- the outdoor unit (20) is provided with an outdoor fan (24a).
- the discharge side of the compressor (21) is connected to the first port of the four-way switching valve (23) via the oil separator (22).
- the second port of the four-way selector valve (23) is connected to one end of the outdoor heat exchanger (24).
- the third port of the four-way selector valve (23) is connected to the suction side of the compressor (21) via a recovery container (40) described later.
- the fourth port of the four-way selector valve (23) is connected to the gas-side stop valve (27).
- the other end of the outdoor heat exchanger (24) is connected to the liquid side closing valve (26) via the outdoor expansion valve (25).
- the outdoor circuit (11) is provided with a recovery container (40) used for collecting oxides in a communication pipe cleaning step described later.
- the collection container (40) is formed in a sealed shape and constitutes a collecting member according to the present invention.
- This collection container (40) has an inflow pipe (
- the inflow pipe (42) is connected to the third port of the four-way selector valve (23).
- the inflow valve (51) is provided in the inflow pipe (42).
- the inflow valve (51) and the outflow valve (52) constitute an on-off valve.
- the inflow pipe (42) and the outflow pipe (43) are connected to the upper part of the casing (41) and penetrate the upper wall of the casing (41).
- the inflow pipe (42) includes a straight pipe portion (42a) extending in the vertical direction.
- the lower end of the straight pipe portion (42a) serves as an outlet end, and the outlet end is located near the center in the casing (41).
- Outflow pipe (43) A straight pipe portion (43a) extending in the direction is provided.
- the lower end of the straight pipe portion (43a) serves as an inlet end, and the inlet end is located at the upper part in the casing (41).
- the outlet end of the inflow pipe (42) and the inlet end of the outflow pipe (43) open toward the bottom in the recovery container (40) and are formed to face the same direction without facing each other.
- the outlet end of the inflow pipe (42) is located below the inlet end of the outflow pipe (43). Accordingly, it is possible to reliably prevent the refrigerant that has flowed into the recovery container (40) through the inflow pipe (42) from directly flowing into the outflow pipe (43).
- the outdoor circuit (11) is provided with a bypass pipe (54) that bypasses the recovery container (40).
- the bypass pipe (54) has one end connected between the inlet valve (51) and the third port of the four-way selector valve (23), and the other end connected to the outlet of the outlet valve (52) and the compressor (21). Connected to the side.
- the bypass pipe (54) is provided with a bypass valve (53) constituting an on-off valve.
- One end of an oil return pipe (22a) is connected to the oil separator (22).
- the other end of the oil return pipe (22a) is connected between the outflow valve (52) and the suction side of the compressor (21) and downstream of the connection part of the bypass pipe (54).
- the synthetic oil discharged with the compressor (21) force mixed with the gas refrigerant is separated from the gas refrigerant by the oil separator (22), and then passed through the oil return pipe (22a) to pass through the compressor (21). Returned to the suction side.
- the indoor circuit (12) of each indoor unit (30) constitutes a use side circuit.
- the indoor expansion valve (32) and the indoor heat exchanger (33) are connected in series by a refrigerant pipe.
- the indoor heat exchange ⁇ (33) is a cross-fin type 'and' tube type heat alternation, and constitutes a use side heat exchange.
- the indoor expansion valve (32) is an electronic expansion valve.
- Each indoor unit (30) is provided with an indoor fan (33a).
- the refrigerant circuit (10) is configured to be switched between a cooling mode operation and a heating mode operation by switching the four-way switching valve (23). Specifically, the four-way selector valve (23) is switched to the state where the first port and the second port communicate with each other and the third port and the fourth port communicate with each other (the state indicated by the solid line in FIG. 1). In other words, in the refrigerant circuit (10), the refrigerant circulates in a cooling mode operation in which the outdoor heat exchanger (24) serves as a condenser and the indoor heat exchanger (33) serves as an evaporator. .
- the refrigerant circuit (10) When the first port and the fourth port of the four-way selector valve (23) communicate with each other and the second port and the third port communicate with each other (the state indicated by the broken line in FIG. 1), In the refrigerant circuit (10), the refrigerant circulates by the operation of the heating mode in which the outdoor heat exchange (24) serves as an evaporator and the indoor heat exchange (33) serves as a condenser.
- Refrigerating equipment ⁇ a preparation method
- the assembly method of the refrigeration apparatus (5) described below is an assembly method at the installation site of the refrigeration apparatus (5).
- One outdoor unit (20) and three indoor units (30, 30, 30) are manufactured at the factory and carried to the installation site.
- a communication pipe configuration process is performed.
- the diameter of the communication pipe (45) becomes relatively large, for example, a pipe (46) of about 4 m is carried in and the pipes (46, 46) are connected to each other at the installation site.
- adjacent pipes (46,46) are connected to each other at the installation site, and a plurality of pipes (46,4 6, ...) are connected to the communication pipe (45).
- the pipes (46, 46) are connected by brazing. Then, when all the pipes (46, 46,...) Are joined, the connecting pipe construction process ends.
- the gas side connecting pipe (45b) is formed with a larger diameter than the liquid side connecting pipe (45a)! Therefore, more oxide is formed than the liquid side connecting pipe (45a). .
- a process of attaching a drain pipe to each indoor unit (30), a process of covering the communication pipe (45) with a heat insulating material, and both units (20, 30) A process of performing electrical wiring is performed.
- a refrigerant circuit configuration step is performed.
- one end of the liquid side communication pipe (45a) is connected to the liquid side shut-off valve (26) of the outdoor unit (20), and the other end of the liquid side communication pipe (45a) branched into three is connected to each other.
- the refrigerant circuit (10) is filled with the refrigerant.
- the refrigerant circuit (10) is filled with a refrigerant, an airtight test and a vacuum are performed. The air tightness test is conducted to investigate the presence or absence of refrigerant leakage.
- the evacuation is performed to remove moisture and air in the refrigerant circuit (10), and the liquid side closing valve (26) and the gas side closing valve (27) are closed.
- the liquid side closing valve (26) and the gas side closing valve (27) are opened, and additional refrigerant charging is performed.
- a communication pipe cleaning step is performed.
- the inflow valve (51) and the outflow valve (52) are opened, and the bypass valve (53) is closed.
- the four-way switching valve (23) is switched to the state shown by the solid line in FIG.
- the compressor (21) is started in this state.
- the capacity of the compressor (21) is set so that the refrigerant flows in a turbulent state in the refrigerant circuit (10).
- the opening degree of the outdoor expansion valve (25) and the indoor expansion valve (32) is adjusted as appropriate. Since the four-way selector valve (23) is in the state shown by the solid line in Fig. 1, the refrigerant from which the compressor (21) force is also discharged flows in the order of outdoor heat exchange (24) and indoor heat exchanger (33). Then, the refrigerant flows through the refrigerant circuit (10) and returns to the compressor (21).
- the compressed gas refrigerant When the compressor (21) is driven, the compressed gas refrigerant is discharged from the compressor (21).
- the discharged gas refrigerant flows through the oil separator (22) to the four-way selector valve (23).
- the gas refrigerant that has passed through the four-way selector valve (23) flows into the outdoor heat exchanger (24) and is condensed by exchanging heat with the outdoor air.
- the liquid refrigerant passes through the outdoor expansion valve (25), flows into the liquid side connection pipe (45a) through the liquid side closing valve (26).
- the liquid side connecting pipe (45a) On the inner surface of the liquid side connecting pipe (45a), oxides formed in the connecting pipe forming step are adhered. This oxide is peeled off and pushed away by the liquid refrigerant flowing into the liquid side connecting pipe (45a). Then, the liquid refrigerant containing the oxide flows into each indoor unit (30). In each indoor unit (30), the liquid refrigerant flows into the indoor heat exchanger (33) through the indoor expansion valve (32). In the indoor heat exchanger (33), the liquid refrigerant evaporates by exchanging heat with room air. The The evaporated refrigerant flows into the gas side connecting pipe (45b) together with the acid oxide.
- the gas-side connecting pipe (45b) is attached with oxides formed in the connecting pipe forming step. This oxide is peeled off and pushed away by the gas refrigerant flowing into the gas side communication pipe (45b). Then, the gas refrigerant containing the oxide flows into the recovery container (40) from the inflow pipe (42) through the gas side closing valve (27) and the four-way switching valve (23).
- the gas refrigerant containing the oxide flowing into the recovery container (40) is discharged toward the bottom of the recovery container (40). Of these, the acid is stored in the bottom of the collection container (40).
- the gas refrigerant flows out into the recovery container (40) force refrigerant circuit (10) through the outflow pipe (43) and is sucked into the compressor (21).
- the communication pipe cleaning step is performed for a predetermined time.
- the oxide adhering to the inner surface of the liquid side communication pipe (45a) and gas side communication pipe (45b) is peeled off one after another and collected in the recycle container (40), and the liquid side communication pipe (45a ) And gas side communication pipe (45b).
- the inflow valve (51) and the outflow valve (52) are closed, and the bypass valve (53) is opened. Thereafter, the inflow valve (51) and the outflow valve (52) are always closed, and the bypass valve (53) is always opened. In this state, the cooling mode operation, which is a normal operation, and the heating mode operation are switched.
- the four-way selector valve (23) is in the state indicated by the solid line in FIG.
- the refrigerant discharged from the compressor (21) flows into the oil separator (22), passes through the four-way selector valve (23), and condenses by exchanging heat with outdoor air in the outdoor heat exchanger (24). .
- the condensed refrigerant passes through the outdoor expansion valve (25), flows through the liquid side connecting pipe (45a), and evaporates by exchanging heat with indoor air in the indoor heat exchanger (33). At that time, heat exchanged with the indoor heat exchanger (33) and cooled air is supplied into the room.
- the evaporated refrigerant flows through the gas side communication pipe (45b), returns to the suction side of the compressor (21) through the four-way switching valve (23) and the bypass pipe (54).
- the refrigerant that has also discharged the compressor (21) force flows into the oil separator (22), passes through the four-way selector valve (23) and the gas side connecting pipe (45b), and then passes through the indoor heat exchanger (33) to Heat exchange with Shrink. At that time, heated air is exchanged with the indoor heat exchanger (33) and supplied to the room.
- the condensed refrigerant flows through the liquid side connecting pipe (45a), passes through the outdoor expansion valve (25), and evaporates by exchanging heat with outdoor air in the outdoor heat exchanger (24).
- the evaporated refrigerant is returned to the suction side of the compressor (21) through the four-way switching valve (23) and the bypass pipe (54).
- oxide is attached to the inner surface of the communication pipe (45) in the communication pipe configuration process, this oxide is subjected to the force peeling S of the communication pipe (45) in the communication pipe cleaning process. It is collected. For this reason, even if the refrigeration unit (5) is operated after assembling, there is almost no oxidization in the connecting pipe (45), and the compressor (21) and Troubles such as expansion valve (32) will not occur. Even if the number of brazing points is large, the communication pipe (45) is not attached with oxide by performing the above communication pipe cleaning process once. Unlike the above method, the amount of work to prevent troubles caused by acid does not increase in proportion to the brazing point.
- the refrigerant is circulated in the refrigerant circuit (10) at a relatively large flow rate such that the refrigerant is in a turbulent state.
- the refrigerant flow becomes irregularly turbulent, which is coupled with the large amount of refrigerant flowing in the oxides adhering to the communication pipe (45).
- the acting shear force increases. For this reason, more acid oxide can be peeled off.
- the force to wash away the peeled acid Since it becomes large, the amount of the oxide remaining in the refrigerant circuit (10) can be reduced as much as possible. Therefore, the communication pipe (45) can be more reliably cleaned.
- a large amount of oxide is formed when the refrigerant flows toward the outdoor circuit (11) for collecting the oxide in the communication pipe cleaning step. It is made to flow through the gas side communication pipe (45b). That is, most of the oxides that are peeled off at the connecting pipe (45) are peeled off at the gas side connecting pipe (45b) after passing through each indoor circuit (12), and flow into the outdoor circuit (11) as they are. Collected upstream of compressor (21). Therefore, most of the peeled oxides are collected immediately after the peeling, so that the amount of oxides remaining in the refrigerant circuit (10) can be reduced as much as possible.
- one compressor (21) is provided, and the capacity of the compressor (21) is set by adjusting the output frequency of the inverter.
- the capacity of the compressor (21) may be set by providing a plurality of compressors (21) and changing the number of compressors (21) to be operated.
- the collection container (40) is used as the collecting member, but a filter (40) may be used.
- the filter (40) is provided in the refrigerant pipe between the inflow valve (51) and the outflow valve (52). The refrigerant flows through the filter (40) only at the time of the communication pipe cleaning step in the assembly of the refrigeration apparatus (5).
- the filter should be capable of capturing particles of 100 m or less.
- Fig. 4 shows a cross-sectional view of the recovery container (40) of Modification 3.
- the inflow pipe (42) is connected to the bottom side surface of the casing (41).
- the inflow pipe (42) includes a straight pipe portion (42a) extending in the horizontal direction through the side wall of the casing (41).
- the straight pipe portion (42a) is continuously formed with a curved portion (42b) curved upward in the casing (41), and a straight pipe portion (42c) extending upward is formed at the upper end of the curved portion (42b).
- a curved portion (42d) curved downward is continuously formed at the upper end of the straight pipe portion (42c).
- the lower end of the curved portion (42d) serves as an outlet end, and the outlet end is located at the center of the casing (41).
- the outlet end of the inlet pipe (42) is formed so as to open toward the bottom of the recovery container (40) and face the same direction without facing the inlet end opening of the outlet pipe (43). ing.
- the outlet end of the inflow pipe (42) is located below the inlet end of the outflow pipe (43). Therefore, it is possible to reliably prevent the refrigerant flowing into the recovery container (40) through the inflow pipe (42) from directly flowing into the outflow pipe (43).
- Fig. 5 shows a cross-sectional view of the recovery container (40) of this modified example 4.
- the outflow pipe (43) is connected to the upper side surface of the casing (41).
- the outflow pipe (43) includes a straight pipe portion (43a) that extends through the side wall of the casing (41) in the horizontal direction. Further, the straight pipe portion (43a) is continuously formed with a curved portion (43b) curved upward in the casing (41).
- the upper end of the curved portion (43b) serves as an inlet end, and the inlet end is located at the upper part in the casing (41). That is, the inlet end of the outlet pipe (43) is positioned above the outlet end of the inlet pipe (42), and the inlet end and outlet end are formed to face in opposite directions without the openings facing each other. It has been done. Accordingly, it is possible to reliably prevent the refrigerant that has flowed into the recovery container (40) through the inflow pipe (42) from directly flowing into the outflow pipe (43).
- the inflow pipe (42) is connected to the upper side surface of the casing (41).
- the inflow pipe (42) includes a straight pipe portion (42a) extending through the side wall of the casing (41) in the horizontal direction. Further, the straight pipe portion (42a) is curved downward in the casing (41). The curved portion (42b) is continuously formed. And the lower end of the said curved part (42b) becomes an exit end, This exit end is located in the center part in a casing (41). That is, the outlet end of the inflow pipe (42) is positioned below the inlet end of the outflow pipe (43), and the outlet end and the inlet end are formed to face in opposite directions without the openings facing each other. Yes. Therefore, it is possible to reliably prevent the refrigerant flowing into the recovery container (40) through the inflow pipe (42) from directly flowing into the outflow pipe (43).
- FIG. 7 shows a cross-sectional view of the collection container (40) of Modification 6.
- the inlet end of the outflow pipe (43) is located above the outlet end of the inflow pipe (42), and the inlet end and the outlet end face in opposite directions without the openings facing each other. It is formed as follows. Therefore, it is possible to reliably prevent the refrigerant flowing into the recovery container (40) through the inflow pipe (42) from directly flowing into the outflow pipe (43).
- FIG. 8 shows a cross-sectional view of the recovery container (40) of Modification 7.
- the inlet end of the outflow pipe (43) is located above the outlet end of the inflow pipe (42), and the inlet end and the outlet end are oriented in the same direction without the openings facing each other. Is formed. Therefore, it is possible to reliably prevent the refrigerant flowing into the recovery container (40) through the inflow pipe (42) from directly flowing into the outflow pipe (43).
- a plurality of tubes are joined by brazing. This method is useful for refrigeration equipment that uses twin pipes.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Other Air-Conditioning Systems (AREA)
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2006215196A AU2006215196B2 (en) | 2005-02-16 | 2006-01-31 | Refrigerating apparatus assembling method |
CN2006800027135A CN101107486B (zh) | 2005-02-16 | 2006-01-31 | 冷冻装置的组装方法 |
EP06712674A EP1850077A4 (en) | 2005-02-16 | 2006-01-31 | PROCESS FOR ASSEMBLING A COOLING DEVICE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005039390A JP4016990B2 (ja) | 2005-02-16 | 2005-02-16 | 冷凍装置の組み立て方法 |
JP2005-039390 | 2005-02-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006087902A1 true WO2006087902A1 (ja) | 2006-08-24 |
Family
ID=36916313
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/301531 WO2006087902A1 (ja) | 2005-02-16 | 2006-01-31 | 冷凍装置の組み立て方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20080141524A1 (ja) |
EP (1) | EP1850077A4 (ja) |
JP (1) | JP4016990B2 (ja) |
KR (1) | KR100905614B1 (ja) |
CN (1) | CN101107486B (ja) |
AU (1) | AU2006215196B2 (ja) |
WO (1) | WO2006087902A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6064412B2 (ja) * | 2012-07-30 | 2017-01-25 | 株式会社富士通ゼネラル | 空気調和装置 |
JP5697710B2 (ja) * | 2013-04-08 | 2015-04-08 | 三菱電機株式会社 | 冷凍サイクル装置 |
CN103954086B (zh) * | 2014-05-22 | 2017-02-22 | 珠海格力电器股份有限公司 | 一种空调器灌注制冷剂的方法 |
US11131471B1 (en) * | 2020-06-08 | 2021-09-28 | Emerson Climate Technologies, Inc. | Refrigeration leak detection |
US11359846B2 (en) | 2020-07-06 | 2022-06-14 | Emerson Climate Technologies, Inc. | Refrigeration system leak detection |
US11885516B2 (en) | 2020-08-07 | 2024-01-30 | Copeland Lp | Refrigeration leak detection |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001255045A (ja) * | 2000-03-13 | 2001-09-21 | Yamaha Motor Co Ltd | 冷媒循環式熱移動装置 |
JP3284720B2 (ja) * | 1993-12-28 | 2002-05-20 | ダイキン工業株式会社 | 冷凍装置の施工方法及び冷凍装置 |
JP2004317115A (ja) * | 2003-04-02 | 2004-11-11 | Daikin Ind Ltd | 冷凍装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6510698B2 (en) * | 1999-05-20 | 2003-01-28 | Mitsubishi Denki Kabushiki Kaisha | Refrigeration system, and method of updating and operating the same |
JP2003314909A (ja) | 2002-04-22 | 2003-11-06 | Daikin Ind Ltd | 冷凍装置 |
CN100412470C (zh) * | 2003-04-02 | 2008-08-20 | 大金工业株式会社 | 冷冻装置 |
FR2855673A1 (fr) * | 2003-05-26 | 2004-12-03 | Valeo Equip Electr Moteur | Machine electrique tournante, telle qu'un alternateur ou demarreur, notamment pour vehicule automobile |
-
2005
- 2005-02-16 JP JP2005039390A patent/JP4016990B2/ja not_active Expired - Fee Related
-
2006
- 2006-01-31 CN CN2006800027135A patent/CN101107486B/zh not_active Expired - Fee Related
- 2006-01-31 US US11/883,239 patent/US20080141524A1/en not_active Abandoned
- 2006-01-31 KR KR1020077020815A patent/KR100905614B1/ko not_active IP Right Cessation
- 2006-01-31 WO PCT/JP2006/301531 patent/WO2006087902A1/ja active Application Filing
- 2006-01-31 EP EP06712674A patent/EP1850077A4/en not_active Withdrawn
- 2006-01-31 AU AU2006215196A patent/AU2006215196B2/en not_active Ceased
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3284720B2 (ja) * | 1993-12-28 | 2002-05-20 | ダイキン工業株式会社 | 冷凍装置の施工方法及び冷凍装置 |
JP2001255045A (ja) * | 2000-03-13 | 2001-09-21 | Yamaha Motor Co Ltd | 冷媒循環式熱移動装置 |
JP2004317115A (ja) * | 2003-04-02 | 2004-11-11 | Daikin Ind Ltd | 冷凍装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1850077A4 * |
Also Published As
Publication number | Publication date |
---|---|
AU2006215196B2 (en) | 2009-04-23 |
KR20070106768A (ko) | 2007-11-05 |
JP4016990B2 (ja) | 2007-12-05 |
EP1850077A1 (en) | 2007-10-31 |
EP1850077A4 (en) | 2013-03-13 |
AU2006215196A1 (en) | 2006-08-24 |
CN101107486A (zh) | 2008-01-16 |
JP2006226579A (ja) | 2006-08-31 |
CN101107486B (zh) | 2010-06-09 |
US20080141524A1 (en) | 2008-06-19 |
KR100905614B1 (ko) | 2009-07-02 |
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