WO2011141959A1 - Appareil de commande et appareil de climatisation - Google Patents

Appareil de commande et appareil de climatisation Download PDF

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Publication number
WO2011141959A1
WO2011141959A1 PCT/JP2010/003207 JP2010003207W WO2011141959A1 WO 2011141959 A1 WO2011141959 A1 WO 2011141959A1 JP 2010003207 W JP2010003207 W JP 2010003207W WO 2011141959 A1 WO2011141959 A1 WO 2011141959A1
Authority
WO
WIPO (PCT)
Prior art keywords
refrigerant
indoor unit
leakage
heat source
unit
Prior art date
Application number
PCT/JP2010/003207
Other languages
English (en)
Japanese (ja)
Inventor
▲高▼下博文
川越智一
東幸志
Original Assignee
三菱電機株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2010/003207 priority Critical patent/WO2011141959A1/fr
Priority to US13/637,860 priority patent/US20130014525A1/en
Priority to JP2012514605A priority patent/JPWO2011141959A1/ja
Priority to CN201080066716.1A priority patent/CN102893095B/zh
Priority to EP10851347.4A priority patent/EP2570740B1/fr
Publication of WO2011141959A1 publication Critical patent/WO2011141959A1/fr

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Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/006—Compression machines, plants or systems with reversible cycle not otherwise provided for two pipes connecting the outdoor side to the indoor side with multiple indoor units
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • 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
    • F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
    • F25B2500/221—Preventing leaks from developing
    • 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
    • F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
    • F25B2500/222—Detecting refrigerant leaks
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2519—On-off valves

Definitions

  • the present invention relates to a switching device for switching between passage and interruption of refrigerant passing through a pipe and an air conditioner using a refrigeration cycle. More specifically, the present invention relates to a switching device that shuts off a refrigerant when a refrigerant leaks in an air conditioner.
  • a refrigerant circuit (a refrigerant circuit that circulates refrigerant by sequentially connecting a compressor, a four-way valve, an outdoor unit side heat exchanger, an expansion valve, and an indoor unit side heat exchanger by refrigerant piping) A refrigeration cycle). Then, when the refrigerant evaporates and condenses, heat absorption and heat dissipation are performed on the air to be heat exchanged, and air conditioning operation and cooling operation are performed while changing the pressure of the refrigerant passing through the pipe. Yes.
  • the refrigerant (container) constituting the refrigerant circuit and the refrigerant are circulated by confining the refrigerant in the pipe.
  • the refrigerant leaks to the outside of the circuit for some reason such as poor connection or deterioration over time. Sometimes. If the refrigerant leaks, the desired air conditioning cannot be performed. Moreover, it may ignite and it is not hygienic.
  • a refrigerant leakage sensor for detecting refrigerant leakage from the indoor heat exchanger side to the outside and a refrigerant inflow / outflow side of the indoor heat exchanger on the refrigerant circuit for respectively blocking the refrigerant flow
  • an air conditioner provided with a pair of solenoid valves.
  • recovery means detects the leak of a refrigerant
  • the on-off valve located on the side where the liquid refrigerant (liquid refrigerant) flows (which may be a gas-liquid two-phase refrigerant) is closed.
  • the on-off valves provided before and after the indoor unit-side heat exchanger are configured independently. For this reason, for example, in the case of a configuration in which a plurality of indoor units such as a multi-system are connected in parallel, if an on-off valve is provided for each indoor unit, the size of the indoor unit is dispersed and the size is increased. Will be inhibited. In particular, when refrigerant leakage is detected from the indoor unit, it takes time to restore the indoor unit early.
  • the present invention has been made to solve the above-described conventional problems. For example, even in an air conditioner having a plurality of indoor units, it is possible to efficiently shut off a refrigerant, etc. An object is to obtain a switching device and the like that are easy to manufacture and low in cost.
  • a plurality of shut-off valves for stopping the flow of the refrigerant are integrally formed in a plurality of pipes for circulating the refrigerant between the heat source unit and the plurality of indoor units.
  • a set of shut-off valves corresponding to the number of indoor units is assembled.
  • the shut-off valves corresponding to a plurality of pipes connecting the heat source unit and the indoor unit are integrated as a set, and a plurality of sets are integrated and integrally formed according to the number of indoor units, so a small switching A device can be obtained. Further, it is possible to obtain a switching device that is inexpensive to manufacture and can reduce the cost. Further, since they are integrally formed and assembled, it is easy to connect each indoor unit to each set of stop valves. Further, it is possible to improve maintainability (maintainability).
  • FIG. 10 is a diagram showing a flowchart relating to refrigerant leakage monitoring in a fourth embodiment.
  • FIG. 1 is a diagram showing a switching device B in which a plurality of shut-off valves according to Embodiment 1 of the present invention are integrated and assembled.
  • 1A and 1B are views of the switching device B viewed from different directions.
  • FIG. 1 it has shown in the state which removed the electromagnetic coil (not shown) used as the actuator which opens and closes the closing valves 10 and 11 with an electromagnetic force.
  • the switching device B is formed by integrally forming a closing valve 10 and a closing valve 11 as a set, and a plurality of sets are assembled.
  • the structure is a combination of three sets of closing valves 10c to 10e and closing valves 11c to 11e.
  • the shut-off valve 10 performs communication control of pipes between pipes through which gaseous (including gas-liquid two-phase, the same applies hereinafter) refrigerant flows, and passes or stops the refrigerant.
  • the shut-off valve 11 performs communication control of pipes between pipes through which a liquid (including gas-liquid two-phase, the same applies hereinafter) refrigerant flows, and passes or stops the refrigerant.
  • the configuration of the closing valve 10 and the closing valve 11 will be described later.
  • the pipe 6B and the pipe 7B are pipes for connecting to a first connection pipe 6 and a second connection pipe 7 described later, respectively.
  • the pipes 6c to 6e are pipes having one end connected to the shut-off valves 10c to 10e and the other end connected to indoor units C, D, and E described later.
  • the pipes 7c to 7e are pipes having one end connected to the shut-off valves 11c to 11e and the other end connected to indoor units C, D, and E described later.
  • FIG. 2 is a view showing a ZZ1 cross section of the switching device B in FIG. FIG. 2 shows a state where the electric coil is not energized.
  • the shut-off valve 11e can be communicated by energizing the electromagnetic coil between the pipe 7B connected to the first connection pipe 7 and the pipe 7e connected to the indoor unit E.
  • the stop valve 11e is provided with a main valve chamber 17b between the pipe 7B and the pipe 7e, in which a space in which the main valve 21b can move is formed.
  • a valve seat 18b having a hole 22b is provided at the boundary between the main valve chamber 17b and the pipe 7e. Then, the lid 19b is screwed to the main body with a female threaded portion to block (partition) the space in the main valve chamber 17b from the external space.
  • the main valve 21b slides along the wall of the main valve chamber 17b due to a change in pressure in the main valve chamber 17b, and opens and closes the hole 22b of the valve seat 18b.
  • the lid 19b has a sub valve chamber 24b that communicates with the main valve chamber 17b via the first communication port 23.
  • the sub valve chamber 24b forms a space in which the sub valve 28b that opens and closes the pilot hole 27b of the lid port 26b can be slid and moved.
  • the second communication port 29b that communicates the sub valve chamber 24b and the pipe 7e includes a main body port 30b and a lid port 26b that is formed in the lid body 19b and communicates with the main body port 30b.
  • a cylindrical space 31b is formed between the main body and the lid body 19b, so the lid body port 26b is positioned at any position in the circumferential direction. It doesn't matter.
  • the lid body 19b includes a case 33b in which the sub valve 28b and the spring 32b are built in by brazing the opening of the sub valve chamber 24, and an O-ring 34b for sealing the main valve chamber 17b. (See FIG. 2).
  • the electromagnetic coil for attracting the sub-valve 28b is separated and independent from the main body and is attached to the case 33b.
  • the O-ring 34b is attached to block the space 35b between the main valve 21b and the lid 19b and the space 31b.
  • the first communication port 23b is formed in parallel with the main valve 21b. A clearance (gap) necessary for sliding is provided between the main valve chamber 17b and the main valve 21b.
  • the shut-off valve 10e is communicated by energizing the solenoid valve coil with a pipe 6B having one end connected to the first connection pipe 6 and the other end 6e connected to the indoor unit E.
  • the structure of the shut-off valve 10e, the function of the constituent means, etc. are basically the same as those of the shut-off valve 11e, and the suffix a is attached to the corresponding means instead of the suffix b.
  • the closing valve 11e will be described as a representative with reference to FIG.
  • the electromagnetic coil is not energized, as shown in FIG. 2, the pilot hole 27b of the lid port 26b is closed by the spring 32b.
  • the pressures in the space 36b of the pipe 7B, the space 35b in the main valve chamber 17b, and the space 37b of the pipe 7e are P1, P2, and P3, respectively.
  • the pressure relationship at this time is P1 ⁇ P2> P3.
  • the main valve 21b closes the hole 22b of the valve seat 18b, and blocks the flow path connecting the pipe 7B and the pipe 7e.
  • the electromagnetic coil when the electromagnetic coil is energized, the electromagnetic coil generates electromagnetic force.
  • the sub valve 28b moves to the upper part of the case 33b, and the pilot hole 27b of the lid port 26b is opened.
  • the space 35b near the first communication port 23b of the main valve chamber 17b is connected to the space 37b of the pipe 7e via the first communication port 23b, the sub valve chamber 24b, the lid body port 26b, the space 31b, and the main body port 30b.
  • the pressure relationship at this time is P1> P2 ⁇ P3, and the main valve 21b is closed by the lid body 19 due to a pressure difference generated between the pressure P1 of the space 36b in the pipe 7B and the pressure P2 of the space 35b near the first communication port 23b. Move to the side. For this reason, the hole 22b of the valve seat 18b opens, and the pipe 7B and the pipe 7e communicate with each other. Therefore, a specific flow path can be formed by energizing the electromagnetic valve coil as necessary, and the flow can be controlled.
  • FIG. 3 is a diagram showing the configuration of an air conditioner having a switching device B.
  • a refrigeration cycle apparatus is used as an air conditioner and switching device B is provided.
  • the air conditioner of the present embodiment configures a refrigerant circuit by connecting a heat source unit A and indoor units C, D, and E by piping.
  • a switching device B shown in FIGS. 1 and 2 is connected between the heat source unit A and the indoor units C, D, and E.
  • the heat connection device A and the switching device B are connected by the first connection pipe 6 and the second connection pipe 7.
  • a gaseous refrigerant flows through the first connection pipe 6, and a liquid refrigerant flows through the second connection pipe 7.
  • the first connection pipe 6 has a larger diameter than the second connection pipe 7.
  • the switching device B and the indoor units C, D, and E are connected by indoor first connection pipes 6c to 6e and second indoor connection pipes 7c to 7e, respectively.
  • the heat source machine A of the present embodiment includes a compressor 1, a four-way valve 2, a heat source side heat exchanger (outdoor heat exchanger) 3, and an accumulator 4.
  • the compressor 1 compresses and discharges the sucked refrigerant.
  • the compressor 1 can change the capacity of the compressor 1 (the amount of refrigerant sent out per unit time) by arbitrarily changing the operation frequency, for example, by an inverter circuit or the like. You may be able to.
  • the four-way valve 2 is a valve for switching the flow of the refrigerant, for example, between the cooling operation and the heating operation.
  • the heat source side heat exchanger 3 performs heat exchange between the refrigerant and air (outdoor air).
  • the accumulator 4 is means for storing, for example, liquid surplus refrigerant.
  • the indoor units C, D, and E each have a flow rate regulator 9 (9c to 9e) and a use side heat exchanger (indoor heat exchanger) 5 (5c to 5e).
  • the flow rate regulator 9 and the use side heat exchanger 5 are connected by the connection pipe 8 (8c to 8e).
  • the flow controller 9 adjusts the pressure of the refrigerant in the use side heat exchanger 5 by changing the opening degree.
  • the use side heat exchanger 5 performs heat exchange between the refrigerant and the air. For example, during cooling operation, it functions as an evaporator, and performs heat exchange between the refrigerant and air that has been brought to a low pressure state by the flow rate regulator 9. On the other hand, during the heating operation, it functions as a condenser, and performs heat exchange between the refrigerant flowing in from the first connection pipe 6 side and the air.
  • FIG. 4 is a diagram showing the flow of the refrigerant in the air conditioner in the cooling operation.
  • the operation of the air conditioner configured as shown in FIG. 3 will be described based on the flow of the refrigerant in the refrigerant circuit.
  • each of the indoor units C, D, and E is performing cooling.
  • the shutoff valves 10 and 11 are open.
  • the flow of the refrigerant in the cooling operation is indicated by solid line arrows in FIG.
  • the high-temperature, high-pressure gas (gas) refrigerant compressed and discharged by the compressor 1 passes through the heat source side heat exchanger 3 from the four-way valve 2 and is condensed and liquefied by exchanging heat with air, water and the like.
  • the gas-liquid two-phase high temperature and high pressure flow out of the heat source unit A.
  • the opening degree of the flow rate regulators 9c to 9e is controlled based on the degree of superheat of the refrigerant at the outlets of the use side heat exchangers 5c to 5e. .
  • the refrigerant that has evaporated through the use-side heat exchangers 5c to 5e passes through the indoor first connection pipes 6c to 6e, the electromagnetic valves 10c to 10e of the switching device B, and the first connection pipe 6 to the heat source unit A. Inflow. Thereafter, the refrigerant is sucked into the compressor 1 through the four-way valve 2 and the accumulator 4, and circulated by being compressed and discharged as described above.
  • FIG. 5 is a diagram showing the flow of refrigerant in the air conditioner in heating operation.
  • the indoor units C, D, and E are respectively heating.
  • the flow of the refrigerant in the heating operation is indicated by solid line arrows in FIG.
  • the high-temperature, high-pressure gas (gas) refrigerant compressed and discharged by the compressor 1 passes through the four-way valve 2 and flows out of the heat source unit A. Then, it passes through the first connection pipe 6, the closing valves 10c to 10e of the switching device B, and the indoor unit first connection pipes 6c to 6e and flows into the indoor units C, D, and E.
  • the refrigerant flowing into the indoor units C, D, E passes through the use side heat exchangers 5c to 5e.
  • the refrigerant condenses and liquefies, and heats the air in the room to be heat exchanged, for example.
  • the opening degree of the flow rate adjusters 9c to 9e is controlled based on the degree of supercooling of the refrigerant at the outlets of the use side heat exchangers 5c to 5e. Then, the pressure is reduced to a low pressure by the flow regulators 9c to 9e, and the indoor units C, D, and E flow out.
  • the refrigerant flowing into the heat source machine A evaporates and vaporizes by exchanging heat with air, water, and the like. Thereafter, the refrigerant is sucked into the compressor 1 through the four-way valve 2 and the accumulator 4, and circulated by being compressed and discharged as described above.
  • the shutoff valve 10 that blocks the flow of the refrigerant in the refrigerant circuit configured by connecting the heat source unit A and the indoor units C, D, and E by the pipes 6 and 7, 11 is formed as a set, and is assembled according to the number of indoor units to incorporate the switching device B. Therefore, it is possible to suppress refrigerant leakage into the living room with a small and easy configuration, and inexpensively. Products can be provided. By providing the number of sets of the shut-off valves 10 and 11 corresponding to the indoor units, only the indoor unit related to the refrigerant leakage can be separated from the refrigerant circuit, so that it is not necessary to stop all the operations.
  • shut-off valves 10 and 11 as the switching device B, the service and maintenance are excellent, disassembly and the like can be easily performed, and the work time can be shortened because the work can be performed smoothly.
  • the stop time of the indoor unit related to refrigerant leakage can be shortened and recovered early. For this reason, the lifetime can be extended.
  • manufacturing (production) efficiency can be improved by collecting and forming a set in which the shutoff valves 10 and 11 are integrally formed.
  • the switching device B having three sets of the shut-off valves 10 and 11 has been described, but it is not necessary to limit the number to three sets, and the same effect can be obtained with any number of sets. Further, the same effect can be obtained even if a plurality of heat source device side heat exchangers 3 are installed. Even if an ice heat storage tank or a water heat storage tank (including hot water) is installed in series or in parallel with the heat source device side heat exchanger 3, the same effect can be obtained.
  • FIG. FIG. 6 is a diagram showing a switching device B according to Embodiment 2 of the present invention.
  • the switching device B of the present embodiment includes connection portions Fa corresponding to the pipes 6c to 6e, respectively. Further, connection portions Fb respectively corresponding to the pipes 7c to 7e are provided.
  • the connection portion Fa communicates with the pipe 6 e, and fluid (gas, liquid) can flow in and out from the outside of the refrigerant circuit. Further, the connecting portion Fb also communicates with the pipe 7e so that fluid can flow in and out from the outside of the refrigerant circuit.
  • connection portions Fa and Fb are provided in the pipes 6c to 6e and 7c to 7e corresponding to the indoor units C to E of the switching device B so that fluid can flow in and out of the refrigerant circuit. .
  • the connecting portion Fb is composed of a pipe 12b, a joint 13b, a cap 14b, a valve 15b, and a convex member 16b.
  • the pipe 12b is connected to the pipe 7e by brazing.
  • the pipe 12b is in communication.
  • the joint 13b has a valve 15b having a convex member 16b inserted therein.
  • One end of the joint 13b is connected to the pipe 12b by brazing, and the cap 14b is screwed with a male screw portion so that the other end does not come into contact with the convex member 16b.
  • the convex-shaped member 16b becomes a plug and is shut off from the outside.
  • the connecting portion Fa has a pipe 12a connected to the pipe 7e by brazing.
  • the configuration of the connection portion Fa, the function of the constituent means, and the like are basically the same as those of the connection portion Fb, and the suffix a is attached.
  • connection portions Fa and Fb and the vacuum pump can be connected to perform evacuation. Furthermore, a predetermined amount of refrigerant can be sealed by connecting to a refrigerant cylinder using a refrigerant hose. The above measures can be performed not only when the refrigerant leaks but also when checking.
  • connection portions Fa and Fb are provided corresponding to the shut-off valves 10 and 11 so that the fluid can flow in and out from the outside.
  • an inert gas is allowed to flow into the indoor unit separated from the refrigerant circuit by the shutoff valves 10 and 11 to check the presence or absence of the refrigerant leakage, the leakage location, and the other indoor units can perform air conditioning.
  • evacuation by suction, addition of a refrigerant, and the like can be performed via the connection portions Fa and Fb. For this reason, it is rich in service and maintainability, the user in the living room will not feel uncomfortable, and the indoor unit can be restored early.
  • Embodiment 3 the operation of switching device B when refrigerant leakage occurs in a specific indoor unit will be described with reference to FIG.
  • a case where a refrigerant leak occurs in the room where the indoor unit E is attached will be described.
  • the shutoff valve 11e is closed to stop the flow of the refrigerant that is about to flow into the indoor unit E. Then, the closing valve 10e is closed after a predetermined time has elapsed.
  • the closing valve 10e is closed after a predetermined time has elapsed.
  • the predetermined time varies depending on the size of the indoor unit E (the distance through which the refrigerant flows, etc.), it is assumed that the predetermined time is sufficient for the refrigerant to flow out.
  • the shutoff valve 10e is closed to stop the flow of the refrigerant that is about to flow into the indoor unit E.
  • the stop valve 11e is closed after progress for predetermined time. It is possible to suppress a decrease in the amount of refrigerant in the refrigerant circuit, reduce the influence of refrigerant leakage on the operation, and further reduce refrigerant leakage into the living room.
  • the predetermined time may be a time different from the time during the cooling operation described above.
  • the shutoff valves 10 and 11 for blocking the flow of the refrigerant are connected to the refrigerant circuit configured by connecting the heat source unit A and the indoor units C to E through the pipes 6 and 7.
  • the switching device B is incorporated so that leakage of the refrigerant into the room can be suppressed with a small and easy configuration. For this reason, it is possible to provide an inexpensive product while improving safety by suppressing the decrease in oxygen concentration in the living room.
  • the refrigerant leakage related to one indoor unit has been described. However, for example, the same effect can be achieved even when a plurality of indoor units are leaking refrigerant.
  • FIG. 7 is a diagram illustrating a configuration of a leakage monitoring system in the air-conditioning apparatus according to Embodiment 4 of the present invention.
  • refrigerant leakage sensors 39c to 39e are installed in the living room to which the indoor units C to E are attached, respectively, and detect the refrigerant state in the living room. And if it judges that the density
  • the heat source device control device 41 controls each means constituting the heat source device A.
  • a communication means for communicating with other devices of the air conditioner is provided, and various signals can be communicated.
  • it has a recording means (memory) and records data relating to refrigerant leakage.
  • the indoor unit control devices 42c to 42e control the respective units constituting the indoor units C to E, respectively.
  • various signals can be communicated with the heat source machine control device 41. Also, a process for displaying the operation state on the display means of the remote controllers 43c to 43e is performed.
  • the interface device 40 transmits a signal (hereinafter referred to as a “close signal”) relating to the closing (refrigerant shutoff) transmitted from the heat source device communication device 41 to the switching device B via the control line, thereby closing the device.
  • the electromagnetic coils of the valves 10 and 11 are energized.
  • the interface device 40 is connected to a communication line connecting the heat source device communication device 41 and the indoor unit communication devices 42c to 42e, and can perform communication using the same communication system. For this reason, it is possible to reduce the possibility that only communication related to refrigerant leakage results in communication failure.
  • the remote controllers 43c to 43e are input means for the user to input instructions to the indoor units C to E. Further, it has a display means, and displays the operation state and the like based on signals from the indoor units C to E. In the present embodiment, display of refrigerant leakage is performed based on the signal.
  • FIG. 8 is a diagram illustrating a flowchart relating to leakage monitoring according to the fourth embodiment.
  • the refrigerant leakage sensor 39c detects refrigerant leakage will be described.
  • the refrigerant leak sensor 39c provided in the living room detects a refrigerant having a concentration equal to or higher than a predetermined value (step S1)
  • the refrigerant leak sensor 39c transmits a leak signal to the indoor unit control device 42c of the indoor unit C. .
  • the indoor unit control device 42c receives the leakage signal of the refrigerant leakage sensor 39c. Then, the indoor unit control device 42c causes the display means of the remote controller 43c, for example, to display a leak (step S2). In addition, a refrigerant leakage information signal based on the received leakage signal is transmitted to the heat source apparatus control device 41. Here, for example, when sound can be generated, notification can be performed.
  • the heat source device control device 41 When receiving the refrigerant leakage information signal, the heat source device control device 41 records the data relating to the leakage in the recording means in the heat source device control device 41 (step S3).
  • the data is stored in the storage unit, but for example, a signal may be transmitted to a higher-level device (for example, a centralized controller).
  • the heat source device control device 41 transmits a closing signal for closing the closing valves 10 c and 11 c related to the indoor unit C to the interface device 40.
  • the interface device 40 transmits a closing signal to the switching device B.
  • the electromagnetic coils related to the corresponding closing valves 10c and 11c are energized to close the closing valves 10c and 11c (step S4).
  • the operation of the switching device B based on the closing signal and the operation of the closing valves 10 and 11 for performing treatment are the same as those described in the first and third embodiments.
  • the interface device 40 that normally transmits the instruction signal to the switching device B to the communication control line for communication connection between the heat source device A and the indoor units C to E.
  • the heat source apparatus A instructs the interface device 40, but the present invention is not limited to this.
  • the instruction signal may be transmitted directly from the indoor units C to E to the interface device 40.
  • the interface device 40 and the heat source device A are separated, but the interface device 40 may be mounted on the heat source device A, for example.
  • the switching device B is provided in the air conditioner.
  • the present invention is not limited to these apparatuses, and can be applied to other refrigeration cycle apparatuses that constitute a refrigerant circuit in which a refrigerant circulates in a pipe, such as a refrigeration apparatus and a heat pump apparatus.

Abstract

Cette invention concerne un appareil de commande apte à bloquer efficacement un fluide frigorigène, et ce même, par exemple, dans un appareil de climatisation comprenant une pluralité d'unités d'intérieur. L'appareil de l'invention est de conception simple, facile à entretenir et il peut être produit à faible coût. Une pluralité de robinets de sectionnement (10, 11) destinés à arrêter le flux de réfrigérant, est formée dans une pluralité de tuyaux (6, 7) destinés à la circulation d'un fluide frigorigène entre une machine formant source de chaleur (A) et une pluralité d'unités d'intérieur (C-E). Lesdits robinets de sectionnement sont formés d'une seule pièce avec lesdits tuyaux et ils sont assemblés par groupes. Les groupes de robinets de sectionnement (10c-10e, 11c-11e) dont le nombre correspond au nombre d'unités d'intérieur, sont ensuite assemblés.
PCT/JP2010/003207 2010-05-12 2010-05-12 Appareil de commande et appareil de climatisation WO2011141959A1 (fr)

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PCT/JP2010/003207 WO2011141959A1 (fr) 2010-05-12 2010-05-12 Appareil de commande et appareil de climatisation
US13/637,860 US20130014525A1 (en) 2010-05-12 2010-05-12 Switching device and air-conditioning apparatus
JP2012514605A JPWO2011141959A1 (ja) 2010-05-12 2010-05-12 切換装置及び空気調和装置
CN201080066716.1A CN102893095B (zh) 2010-05-12 2010-05-12 切换装置及空调装置
EP10851347.4A EP2570740B1 (fr) 2010-05-12 2010-05-12 Appareil de climatisation

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PCT/JP2010/003207 WO2011141959A1 (fr) 2010-05-12 2010-05-12 Appareil de commande et appareil de climatisation

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US20130014525A1 (en) 2013-01-17
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EP2570740B1 (fr) 2019-02-27
CN102893095A (zh) 2013-01-23
CN102893095B (zh) 2016-01-06
JPWO2011141959A1 (ja) 2013-07-22

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