US20230024725A1 - Refrigeration cycle apparatus - Google Patents

Refrigeration cycle apparatus Download PDF

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Publication number
US20230024725A1
US20230024725A1 US17/956,477 US202217956477A US2023024725A1 US 20230024725 A1 US20230024725 A1 US 20230024725A1 US 202217956477 A US202217956477 A US 202217956477A US 2023024725 A1 US2023024725 A1 US 2023024725A1
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United States
Prior art keywords
intermediate plate
compressor
center
gravity
refrigeration cycle
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US17/956,477
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English (en)
Inventor
Masao Ohno
Tetsuya Okamoto
Kazushi Hisayama
Kebi CHEN
Yoshinobu Tsumura
Masanori Ukibune
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Daikin Industries Ltd
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Daikin Industries Ltd
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Assigned to DAIKIN INDUSTRIES, LTD. reassignment DAIKIN INDUSTRIES, LTD. ASSIGNMENT BY DECLARATION Assignors: CHEN, KEBI
Assigned to DAIKIN INDUSTRIES, LTD. reassignment DAIKIN INDUSTRIES, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TSUMURA, YOSHINOBU, HISAYAMA, KAZUSHI, UKIBUNE, MASANORI, OKAMOTO, TETSUYA, OHNO, MASAO
Publication of US20230024725A1 publication Critical patent/US20230024725A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F24F1/08—Compressors specially adapted for separate outdoor units
    • F24F1/12—Vibration or noise prevention thereof
    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
    • 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
    • F25B31/00—Compressor arrangements
    • 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
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • 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
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/13—Economisers

Definitions

  • the present disclosure relates to a refrigeration cycle apparatus.
  • Patent Document 1 discloses a heat pump outdoor unit with a first anti-vibration mount on a bottom plate of a machine chamber, and an intermediate base including a second anti-vibration mount, which is supported by the first mount and to which legs of a compressor are to be attached.
  • PATENT DOCUMENT 1 Japanese Unexamined Patent Publication No. 2010-243033
  • a first aspect of the present disclosure is directed to a refrigeration cycle apparatus including: a housing ( 2 ) having a bottom member ( 3 ); and a plurality of compressors accommodated in the housing ( 2 ), the plurality of compressors at least including a first compressor ( 10 ) and a second compressor ( 20 ), the first compressor ( 10 ) and the second compressor ( 20 ) being supported by a same intermediate plate ( 5 ) through a plurality of first elastic members ( 11 ), and the intermediate plate ( 5 ) being supported by the bottom member ( 3 ) through second elastic members ( 12 ).
  • FIG. 1 is a piping diagram illustrating an example of a configuration of a refrigeration cycle apparatus of a first embodiment.
  • FIG. 2 is a front view illustrating the configuration of the refrigeration cycle apparatus.
  • FIG. 3 is a plan view illustrating the configuration of the refrigeration cycle apparatus.
  • FIG. 4 is a plan view for explaining layout of a first compressor and a second compressor.
  • FIG. 5 is a view illustrating a variation of the first embodiment, and is equivalent to FIG. 4 .
  • FIG. 6 is a front view illustrating a configuration of a refrigeration cycle apparatus of a second embodiment.
  • FIG. 7 is a front view illustrating a configuration of a refrigeration cycle apparatus of a third embodiment.
  • FIG. 8 is a front view illustrating a configuration of a refrigeration cycle apparatus of a fourth embodiment.
  • FIG. 9 is a front view illustrating a configuration of a refrigeration cycle apparatus of a fifth embodiment.
  • FIG. 10 is a plan view illustrating a configuration of a refrigeration cycle apparatus.
  • FIG. 11 is a plan view illustrating layout of devices on an intermediate plate in a refrigeration cycle apparatus of a sixth embodiment.
  • FIG. 12 is a plan view illustrating layout of devices on an intermediate plate in a refrigeration cycle apparatus of a seventh embodiment.
  • FIG. 13 is a plan view illustrating layout of devices on an intermediate plate in a refrigeration cycle apparatus of an eighth embodiment.
  • a refrigeration cycle apparatus ( 1 ) is configured to heat a target fluid.
  • the target fluid is water.
  • the refrigeration cycle apparatus ( 1 ) is configured to supply the heated water to an apparatus utilizing the heated water, such as a hot water tank, a coil for indoor heating, or a coil for floor heating.
  • the refrigeration cycle apparatus ( 1 ) is configured to cool the target fluid.
  • the target fluid is water.
  • the refrigeration cycle apparatus ( 1 ) is configured to supply the cooled water to an apparatus utilizing the cooled water, such as a coil for indoor cooling.
  • the refrigeration cycle apparatus ( 1 ) includes a refrigerant circuit ( 30 ) and a control unit ( 100 ).
  • the refrigerant circuit ( 30 ) includes a first compressor ( 10 ), a second compressor ( 20 ), a four-way switching valve ( 33 ), a heat-source-side heat exchanger ( 34 ), a check valve bridge ( 35 ), an expansion valve ( 36 ), a utilization-side heat exchanger ( 37 ), an accumulator ( 38 ), and an intermediate heat exchanger ( 45 ).
  • the refrigerant circuit ( 30 ) is filled with a refrigerant.
  • the refrigerant circuit ( 30 ) performs a refrigeration cycle by circulating the refrigerant therein.
  • the refrigerant is, for example, a refrigerant R410A, R32, or R407C.
  • the first compressor ( 10 ) is, for example, a scroll compressor.
  • the first compressor ( 10 ) is provided on a discharge side of the second compressor ( 20 ).
  • the first compressor ( 10 ) is connected with a first suction pipe ( 51 ) and a first discharge pipe ( 52 ).
  • the first compressor ( 10 ) is configured to compress the refrigerant sucked therein and to discharge the refrigerant thus compressed.
  • the first compressor ( 10 ) has a greater capacity than the second compressor ( 20 ).
  • the number of rotations of the first compressor ( 10 ) is variable. For example, the number of rotations of a motor is changed by changing an output frequency of an inverter (not illustrated) connected to the first compressor ( 10 ). As a result, the number of rotations (operation frequency) of the first compressor ( 10 ) changes.
  • the second compressor ( 20 ) is, for example, a scroll compressor.
  • the second compressor ( 20 ) is provided on a suction side of the first compressor ( 10 ).
  • the second compressor ( 20 ) is connected with a second suction pipe ( 53 ) and a second discharge pipe ( 54 ).
  • a connection pipe ( 50 ) is configured.
  • the second compressor ( 20 ) and the first compressor ( 10 ) are connected with each other in series via the connection pipe ( 50 ).
  • the second compressor ( 20 ) is configured to compress the refrigerant sucked therein and discharge the refrigerant thus compressed.
  • the number of rotations of the second compressor ( 20 ) is variable. For example, the number of rotations of a motor is changed by changing an output frequency of an inverter (not illustrated) connected to the second compressor ( 20 ). As a result, the number of rotations (operation frequency) of the second compressor ( 20 ) changes.
  • the four-way switching valve ( 33 ) is a solenoid-operated switching valve.
  • the four-way switching valve ( 33 ) switches between a first state (the state indicated by the solid lines in FIG. 1 ) and a second state (the state indicated by the dotted lines in FIG. 1 ).
  • a first port (P 1 ) is connected to the outlet end of the first discharge pipe ( 52 ).
  • a second port (P 2 ) is connected to the inlet end of second suction pipe ( 53 ).
  • a third port (P 3 ) communicates with a gas-side end of the heat-source-side heat exchanger ( 34 ).
  • a fourth port (P 4 ) communicates with a gas-side end of the utilization-side heat exchanger ( 37 ).
  • the heat-source-side heat exchanger ( 34 ) is an outdoor heat exchanger. In the vicinity of the heat-source-side heat exchanger ( 34 ), a fan ( 39 ) is provided. As a result of operation of the fan ( 39 ), heat exchange takes place between the refrigerant of the heat-source-side heat exchanger ( 34 ) and the outdoor air.
  • the check valve bridge ( 35 ) includes four check valves (C). Each of the four check valves (C) allows the refrigerant to flow in the direction indicated by the arrows in FIG. 1 , and restricts the refrigerant from flowing in the opposite direction.
  • the check valve bridge ( 35 ) communicates with a liquid-side end of the heat-source-side heat exchanger ( 34 ) and a liquid-side end of the utilization-side heat exchanger ( 37 ).
  • the expansion valve ( 36 ) expands the refrigerant to lower the pressure of the refrigerant.
  • the expansion valve ( 36 ) is an electronic expansion valve whose opening degree is adjustable.
  • the expansion valve ( 36 ) is connected to the main liquid pipe ( 55 ).
  • the utilization-side heat exchanger ( 37 ) causes heat exchange between the refrigerant and the water.
  • the utilization-side heat exchanger ( 37 ) includes a first channel ( 37 a ) and a second channel ( 37 b ).
  • the first channel ( 37 a ) is a channel through which the refrigerant flows.
  • the second channel ( 37 b ) is a channel through which the water flows.
  • the second channel ( 37 b ) is connected to an intermediate portion of a utilization-side circuit ( 65 ) included in the apparatus utilizing the water (not illustrated).
  • the utilization-side heat exchanger ( 37 ) causes heat exchange between the refrigerant flowing through the first channel ( 37 a ) and the water flowing through the second channel ( 37 b ).
  • the accumulator ( 38 ) is connected to an intermediate portion of the second suction pipe ( 53 ).
  • the accumulator ( 38 ) is a gas-liquid separator. Inside the accumulator ( 38 ), the refrigerant is separated into a liquid refrigerant and a gas refrigerant.
  • the accumulator ( 38 ) is configured to allow only the gas refrigerant to flow out of the accumulator ( 38 ).
  • a bypass circuit ( 60 ) includes a bypass piping (PB) and a bypass check valve ( 61 ).
  • the bypass piping (PB) is connected between the second suction pipe ( 53 ) and the connection pipe ( 50 ).
  • the bypass check valve ( 61 ) allows the refrigerant to flow in a direction from the second suction pipe ( 53 ) to the connection pipe ( 50 ), and restricts the refrigerant from flowing in the opposite direction.
  • An injection circuit ( 40 ) is a circuit for supplying part of the refrigerant flowing through the main liquid pipe ( 55 ) to the suction side of the first compressor ( 10 ).
  • the injection circuit ( 40 ) includes an injection piping (PJ), an injection expansion valve ( 41 ), and an open/close valve ( 42 ).
  • the injection piping (PJ) has one end connected between the expansion valve ( 36 ) and the check valve bridge ( 35 ) in the main liquid pipe ( 55 ).
  • the injection piping (PJ) has the other end branched into two ends, one of which is connected with the first suction pipe ( 51 ) and the other one of which is connected with a compression chamber in the course of compression of the first compressor ( 10 ).
  • the injection expansion valve ( 41 ) is connected to a portion of the injection piping (PJ) upstream of the intermediate heat exchanger ( 45 ).
  • the injection expansion valve ( 41 ) decompresses the refrigerant flowing through the injection piping (PJ).
  • the open/close valve ( 42 ) is switchable between an open state and a closed state.
  • the open/close valve ( 42 ) is in the open state, part of the refrigerant flowing through the injection piping (PJ) is supplied to the suction side of the first compressor ( 10 ).
  • the open/close valve ( 42 ) is in the closed state, the refrigerant flowing through the injection piping (PJ) is supplied to the compression chamber in the course of compression of the first compressor ( 10 ).
  • the intermediate heat exchanger ( 45 ) includes a third channel ( 45 a ) and a fourth channel ( 45 b ).
  • the third channel ( 45 a ) is connected to an intermediate portion of the main liquid pipe ( 55 ).
  • the fourth channel ( 45 b ) is connected to an intermediate portion of the injection piping (PJ).
  • the intermediate heat exchanger ( 45 ) causes heat exchange between the refrigerant flowing through the third channel ( 45 a ) and the refrigerant flowing through the fourth channel ( 45 b ).
  • the refrigeration cycle apparatus ( 1 ) includes various sensors, such as temperature sensors for detecting temperatures of the refrigerant etc. and pressure sensors for detecting pressures of the refrigerant etc. Signals indicative of detection results of the sensors are sent to the control unit ( 100 ).
  • the refrigeration cycle apparatus ( 1 ) includes the control unit ( 100 ).
  • the control unit ( 100 ) includes a microcomputer and a memory device storing software for operating the microcomputer.
  • the control unit ( 100 ) is configured to control the refrigerant circuit ( 30 ) based on the signals from the various sensors and external control signals.
  • the control unit ( 100 ) is configured to output control signals to the first compressor ( 10 ), the second compressor ( 20 ), the four-way switching valve ( 33 ), the expansion valve ( 36 ), the injection expansion valve ( 41 ), the open/close valve ( 42 ), and the like.
  • the control unit ( 100 ) receives values detected by the various sensors.
  • the refrigeration cycle apparatus ( 1 ) performs heating operation and cooling operation.
  • the refrigeration cycle apparatus ( 1 ) is configured such that the first compressor ( 10 ) functions as a high-pressure compressor and the second compressor ( 20 ) functions as a low-pressure compressor.
  • a refrigeration cycle is performed in which the utilization-side heat exchanger ( 37 ) serves a condenser (a radiator) and the heat-source-side heat exchanger ( 34 ) serves as an evaporator. Specifically, the four-way switching valve ( 33 ) is placed in the first state.
  • the refrigerant discharged from the first compressor ( 10 ) passes through the four-way switching valve ( 33 ), and dissipates heat to water to condense in the utilization-side heat exchanger ( 37 ).
  • the refrigerant that has flowed out of the utilization-side heat exchanger ( 37 ) passes through the check valve bridge ( 35 ), and circulates through the main liquid pipe ( 55 ).
  • the refrigerant circulating through the main liquid pipe ( 55 ) dissipates heat to the refrigerant flowing through the fourth channel ( 45 b ), and is supercooled, in the third channel ( 45 a ) of the intermediate heat exchanger ( 45 ). Thereafter, part of the refrigerant flowing through the main liquid pipe ( 55 ) flows into the injection piping (PJ), and the remaining part of the refrigerant is decompressed at the expansion valve ( 36 ) in the main liquid pipe ( 55 ).
  • the refrigerant thus decompressed passes through the check valve bridge ( 35 ) and evaporates in the heat-source-side heat exchanger ( 34 ).
  • the refrigerant that has flowed out of the heat-source-side heat exchanger ( 34 ) sequentially passes through the four-way switching valve ( 33 ) and the accumulator ( 38 ), and is sucked into the second compressor ( 20 ) and compressed.
  • the refrigerant discharged from the second compressor ( 20 ) is sucked into the first compressor ( 10 ) and is compressed.
  • the refrigerant that has flowed into the injection piping (PJ) is decompressed at the injection expansion valve ( 41 ), and absorbs heat from the refrigerant flowing through the third channel ( 45 a ) and evaporates in the fourth channel ( 45 b ) of the intermediate heat exchanger ( 45 ). Thereafter, the refrigerant flowing through the injection piping (PJ) is introduced into the first suction pipe ( 51 ) to the first compressor ( 10 ).
  • a refrigeration cycle is performed in which the heat-source-side heat exchanger ( 34 ) serves as a condenser (a radiator) and the utilization-side heat exchanger ( 37 ) serves as an evaporator.
  • the four-way switching valve ( 33 ) is placed in the second state. An explanation of the flow of the refrigerant during the cooling operation is omitted.
  • the refrigeration cycle apparatus ( 1 ) includes a housing ( 2 ).
  • the housing ( 2 ) has a bottom member ( 3 ) and a cover member ( 4 ).
  • An interior of the housing ( 2 ) is partitioned into a heat exchange chamber (S 1 ) and a machine chamber (S 2 ) by a partition ( 5 ).
  • the cover member ( 4 ) covers the heat exchange chamber (S 1 ) and the machine chamber (S 2 ).
  • the heat-source-side heat exchanger ( 34 ) and the fan ( 39 ) are provided in the heat exchange chamber (S 1 ).
  • heat exchange takes place between the refrigerant flowing through the heat-source-side heat exchanger ( 34 ) and the outdoor air.
  • the devices illustrated within the virtual frame line in FIG. 1 are provided. Specifically, the machine chamber (S 2 ) accommodates the first compressor ( 10 ), the second compressor ( 20 ), and refrigerant circuit component parts ( 31 ) constituting the refrigerant circuit ( 30 ). Although not illustrated, the control unit ( 100 ) is located in the machine chamber (S 2 ).
  • the first compressor ( 10 ) is supported by an intermediate plate ( 5 ) through a plurality of first elastic members ( 11 ). Specifically, the first compressor ( 10 ) is provided with a first supporting leg ( 16 ). Between the first supporting leg ( 16 ) and the intermediate plate ( 5 ), three first elastic members ( 11 ) are provided.
  • the second compressor ( 20 ) is supported by the same intermediate plate ( 5 ) through a plurality of first elastic members ( 11 ). Specifically, the second compressor ( 20 ) is provided with second supporting legs ( 26 ). Between the second supporting leg ( 26 ) and the intermediate plate ( 5 ), three first elastic members ( 11 ) are provided.
  • the first elastic members ( 11 ) may be a single large piece or may be two or more separate pieces as long as the first elastic member ( 11 ) or the first elastic members ( 11 ) can support the first compressor ( 10 ) and the second compressor ( 20 ).
  • the first elastic members ( 11 ) are made of rubber or urethan.
  • the intermediate plate ( 5 ) is supported by the bottom member ( 3 ) of the housing ( 2 ) through the plurality of second elastic members ( 12 ). Between the intermediate plate ( 5 ) and the bottom member ( 3 ), four second elastic members ( 12 ) are provided. The second elastic members ( 12 ) are provided at four corners of the intermediate plate ( 5 ), respectively.
  • the second elastic members ( 12 ) may be a single large piece or may be two or more separate pieces.
  • the second elastic members ( 12 ) are made of rubber or urethan.
  • the first elastic members ( 11 ) and the second elastic members ( 12 ) may be made from the same material or different materials, and may have the same spring constant or different spring constants.
  • the first compressor ( 10 ) and the second compressor ( 20 ) are placed on a double anti-vibration structure that includes the first elastic members ( 11 ), the intermediate plate ( 5 ), and the second elastic members ( 12 ). With this configuration, even if the first compressor ( 10 ) and the second compressor ( 20 ) vibrate during the operation of the refrigeration cycle apparatus ( 1 ), transmission of the vibration and noise generation are reduced.
  • the first compressor ( 10 ) and the second compressor ( 20 ) are supported by the same intermediate plate ( 5 ) through a plurality of first elastic members ( 11 ).
  • This configuration facilitates attaining a more compact implementation area for the first compressor ( 10 ) and the second compressor ( 20 ), compared with the case where the first compressor ( 10 ) and the second compressor ( 20 ) are placed separately from each other.
  • the vibration isolation effect improves since the overall weight of the structure supported by the second elastic members ( 12 ) is increased, the vibration isolation effect improves.
  • the first compressor ( 10 ) Since the first compressor ( 10 ) has a greater capacity than the second compressor ( 20 ), the first compressor ( 10 ) is heavier than the second compressor ( 20 ). Thus, the vibration of the second compressor ( 20 ), which has a relatively low weight, can be reduced by the weight of the first compressor ( 10 ).
  • the center of gravity of a layout is the point that is the center (middle point) of vibration of the intermediate plate ( 5 ). In other words, is the point where the amplitude is greatest when the intermediate plate ( 5 ) vibrates.
  • the four second elastic members ( 12 ) are identical with each other in terms of the material, area, and thickness. Accordingly, the center of gravity Q 1 of the layout of the second elastic members ( 12 ) is the intersection of the line connecting the second elastic members ( 12 ) at the upper left corner and the lower right corner in FIG. 4 and the line connecting the second elastic members ( 12 ) at the lower left corner and the upper right corner in FIG. 4 .
  • the three first elastic members ( 11 ) are placed at vertexes of an equilateral triangle.
  • the three first elastic members ( 11 ) are identical with each other in terms of the material, area, and thickness.
  • the center of gravity of the layout of the first elastic members ( 11 ) is the center of gravity of the equilateral triangle in plan view.
  • the first compressor ( 10 ) has a cylindrical shape.
  • the center of gravity C 1 of the first compressor ( 10 ) is an approximate point to the center of the circle in FIG. 4 .
  • the center of gravity C 1 of the first compressor ( 10 ) coincides with the center of gravity of the layout of the three first elastic members ( 11 ) supporting the first supporting leg ( 16 ) in plan view.
  • the second compressor ( 20 ) has a cylindrical shape.
  • the center of gravity C 2 of the second compressor ( 20 ) is an approximate point to the center of the circle in FIG. 4 .
  • the center of gravity C 2 of the second compressor ( 20 ) coincides with the center of gravity of the layout of the three first elastic members ( 11 ) supporting the second supporting leg ( 26 ) in plan view.
  • the center of gravity of the combination of the intermediate plate ( 5 ) and the first and second compressors ( 10 ) and ( 20 ) in plan view will be referred to as the center of gravity P 1 .
  • the center of gravity P 1 is located in the vicinity of the center of gravity Q 1 of the layout of the second elastic members ( 12 ) in plan view.
  • the center of gravity P 1 is closer to the first compressor ( 10 ) than the center of gravity Q 1 of the layout.
  • the first compressor ( 10 ) is the nearest compressor from the center of gravity P 1 .
  • the distance from the center of gravity P 1 to the first compressor ( 10 ) in plan view will be referred to as a distance r 1 .
  • the center of gravity Q 1 of the layout is located in an area having the center of gravity P 1 as the center and the distance r 1 as a radius.
  • the center of gravity P 1 may substantially coincide with the center of gravity Q 1 of the layout of the second elastic members ( 12 ) in plan view.
  • the control unit ( 100 ) may be configured to control the operation of the first compressor ( 10 ) and the second compressor ( 20 ) to reduce the transmission of the vibration generated in the first compressor ( 10 ) and the second compressor ( 20 ) to the housing ( 2 ).
  • control unit ( 100 ) may be configured to control the first compressor ( 10 ) and the second compressor ( 20 ) so that they rotate in the same rotational direction and with phases shifted by 180°. In this configuration, centrifugal forces generated in the first compressor ( 10 ) and the second compressor ( 20 ) cancel out each other.
  • vibrations generated in the first compressor ( 10 ) and the second compressor ( 20 ) cancel out each other, which makes it possible to further enhance the vibration isolation effect.
  • the intermediate plate ( 5 ) is supported by the bottom member ( 3 ) through the second elastic members ( 12 ).
  • the first compressor ( 10 ) and the second compressor ( 20 ) are supported by the same intermediate plate ( 5 ) through the plurality of first elastic members ( 11 ).
  • a more compact implementation area for the first compressor ( 10 ) and the second compressor ( 20 ) can be attained, compared with the case where the first compressor ( 10 ) and the second compressor ( 20 ) are placed separately from each other.
  • the vibration isolation effect improves.
  • the second compressor ( 20 ) is lighter in weight than the first compressor ( 10 ).
  • the vibration of the second compressor ( 20 ) can be reduced by the weight of the first compressor ( 10 ).
  • the center of gravity Q 1 of the layout is located in an area whose radius is the distance r 1 from the center of gravity P 1 to the center of gravity of the nearest compressor to the center of gravity P 1 in plan view.
  • the center of gravity P 1 substantially coincides with the center of gravity Q 1 of the layout in plan view.
  • the rotations of the first compressor ( 10 ) and the second compressor ( 20 ) are controlled, so that the centrifugal forces generated in the first compressor ( 10 ) and the second compressor ( 20 ) cancel out each other.
  • the vibrations generated in the plurality of compressors cancel out each other, which makes it possible to further enhance the vibration isolation effect.
  • a first compressor ( 10 ), a second compressor ( 20 ), and a plurality of refrigerant circuit component parts ( 31 ) are placed on the intermediate plate ( 5 ).
  • the refrigerant circuit component parts ( 31 ) are a utilization-side heat exchanger ( 37 ) and an accumulator ( 38 ).
  • the center of gravity Q 1 of the layout of the second elastic members ( 12 ) is the intersection of the line connecting the second elastic members ( 12 ) at the upper left corner and the lower right corner in FIG. 5 and the line connecting the second elastic members ( 12 ) at the lower left corner and the upper right corner in FIG. 4 .
  • the center of gravity of the combination of the intermediate plate ( 5 ), the first compressor ( 10 ), the second compressor ( 20 ), the utilization-side heat exchanger ( 37 ), and the accumulator ( 38 ) in plan view will be referred to as the center of gravity P 2 .
  • the center of gravity P 2 is located in the vicinity of the center of gravity Q 1 of the layout of the second elastic members ( 12 ) in plan view.
  • the first compressor ( 10 ) and the second compressor ( 20 ) are located at lower portions of FIG. 5 , and therefore the center of gravity P 2 is closer to the lower side than the center of gravity Q 1 of the layout. Moreover, since the first compressor ( 10 ) is heavier in weight than the second compressor ( 20 ), the center of gravity P 2 is closer to the first compressor ( 10 ) than the center of gravity Q 1 of the layout. Thus, the center of gravity P 2 is closer to the lower right side in FIG. 5 than the center of gravity Q 1 of the layout.
  • the first compressor ( 10 ) is the nearest compressor from the center of gravity P 2 .
  • the distance from the center of gravity P 2 to the first compressor ( 10 ) in plan view will be referred to as a distance r 2 .
  • the center of gravity Q 1 of the layout is located in an area having the center of gravity P 2 as the center and the distance r 2 as a radius.
  • the center of gravity P 2 may substantially coincide with the center of gravity Q 1 of the layout of the second elastic members ( 12 ) in plan view.
  • refrigerant circuit component parts ( 31 ) other than the first compressor ( 10 ), the second compressor ( 20 ), the accumulator ( 38 ), and the utilization-side heat exchanger ( 37 ) may be arranged on the intermediate plate ( 5 ).
  • the refrigerant circuit component parts ( 31 ) include the intermediate heat exchanger ( 45 ), the four-way switching valve ( 33 ), the check valve bridge ( 35 ), the expansion valve ( 36 ), the bypass check valve ( 61 ), etc.
  • an intermediate plate ( 5 ) includes a first intermediate plate ( 15 ) and a second intermediate plate ( 25 ).
  • the first compressor ( 10 ) is supported by the first intermediate plate ( 15 ) through a plurality of first elastic members ( 11 ).
  • the second compressor ( 20 ) is supported by the second intermediate plate ( 25 ) through a plurality of first elastic members ( 11 ).
  • the intermediate plate ( 5 ) includes the first intermediate plate ( 15 ) and the second intermediate plate ( 25 ) which are coupled integrally.
  • the first intermediate plate ( 15 ) and the second intermediate plate ( 25 ) are coupled integrally to each other with coupling members ( 27 ).
  • the coupling members ( 27 ) are a pair of upper and lower members which vertically sandwich the intermediate plate ( 5 ). A left edge portion of the first intermediate plate ( 15 ) and a right edge portion of the second intermediate plate ( 25 ) are in contact with each other. The pair of upper and lower coupling members ( 27 ) cover the boundary between the first intermediate plate ( 15 ) and the second intermediate plate ( 25 ).
  • the coupling members ( 27 ), the first intermediate plate ( 15 ), and the second intermediate plate ( 25 ) are coupled integrally to each other by brazing or welding.
  • the first intermediate plate ( 15 ) and the second intermediate plate ( 25 ) are therefore melted and joined to each other, thereby improving a joint strength of the intermediate plate ( 5 ).
  • the first intermediate plate ( 15 ) and the second intermediate plate ( 25 ) may be coupled integrally to each other by brazing or welding the boundary between the first intermediate plate ( 15 ) and the second intermediate plate ( 25 ), without the coupling members ( 27 ).
  • the coupling members ( 27 ), the first intermediate plate ( 15 ), and the second intermediate plate ( 25 ) may be coupled integrally with a rivet or bolt. This configuration can make it easy to perform the operation of coupling the first intermediate plate ( 15 ) and the second intermediate plate ( 25 ) integrally to each other.
  • an intermediate plate ( 5 ) includes a first intermediate plate ( 15 ) and a second intermediate plate ( 25 ).
  • the first compressor ( 10 ) is supported by the first intermediate plate ( 15 ) through a plurality of first elastic members ( 11 ).
  • the second compressor ( 20 ) is supported by the second intermediate plate ( 25 ) through a plurality of first elastic members ( 11 ).
  • the intermediate plate ( 5 ) includes the first intermediate plate ( 15 ) and the second intermediate plate ( 25 ) which are coupled integrally.
  • the first intermediate plate ( 15 ) and the second intermediate plate ( 25 ) are coupled integrally to each other, with the first intermediate plate ( 15 ) and the second intermediate plate ( 25 ) partially overlapped with each other in plan view.
  • the second intermediate plate ( 25 ) has a coupling portion ( 28 ).
  • the coupling portion ( 28 ) is formed by bending an edge portion of the second intermediate plate ( 25 ) closer to the first intermediate plate ( 15 ) into a step-like shape.
  • the coupling portion ( 28 ) of the second intermediate plate ( 25 ) overlaps the first intermediate plate ( 15 ) in plan view.
  • the first intermediate plate ( 15 ) and the coupling portion ( 28 ) of the second intermediate plate ( 25 ) are coupled integrally to each other by brazing or welding, for example.
  • first intermediate plate ( 15 ) and the coupling portion ( 28 ) of the second intermediate plate ( 25 ) may be coupled integrally with a rivet or bolt.
  • the coupling portion ( 28 ) may be formed in the first intermediate plate ( 15 ).
  • an intermediate plate ( 5 ) includes a first intermediate plate ( 15 ) and a second intermediate plate ( 25 ).
  • the first compressor ( 10 ) is supported by the first intermediate plate ( 15 ) through a plurality of first elastic members ( 11 ).
  • the second compressor ( 20 ) is supported by the second intermediate plate ( 25 ) through a plurality of first elastic members ( 11 ).
  • the intermediate plate ( 5 ) includes the first intermediate plate ( 15 ) and the second intermediate plate ( 25 ) which are coupled integrally.
  • the first intermediate plate ( 15 ) and the second intermediate plate ( 25 ) are coupled integrally to each other via a third elastic member ( 13 ).
  • the second intermediate plate ( 25 ) has a coupling portion ( 28 ).
  • the coupling portion ( 28 ) is formed by bending an edge portion of the second intermediate plate ( 25 ) closer to the first intermediate plate ( 15 ) into a step-like shape.
  • the coupling portion ( 28 ) of the second intermediate plate ( 25 ) overlaps the first intermediate plate ( 15 ) in plan view.
  • the third elastic member ( 13 ) is provided between the coupling portion ( 28 ) of the second intermediate plate ( 25 ) and the first intermediate plate ( 15 ).
  • the first intermediate plate ( 15 ) and the second intermediate plate ( 25 ) are coupled integrally to each other via the third elastic member ( 13 ).
  • the third elastic member ( 13 ) is made from rubber of urethan.
  • the third elastic member ( 13 ) is bonded to the first intermediate plate ( 15 ) and the second intermediate plate ( 25 ).
  • the third elastic member ( 13 ) can ease the differences in the displacement of the first intermediate plate ( 15 ) and the second intermediate plate ( 25 ) caused by the vibrations in the first intermediate plate ( 15 ) and the second intermediate plate ( 25 ).
  • a first compressor ( 10 ) and a second compressor ( 20 ) are placed on an intermediate plate ( 5 ).
  • the center of gravity of the combination of the intermediate plate ( 5 ), the first compressor ( 10 ), and the second compressor ( 20 ) in plan view will be referred to as the center of gravity P 1 .
  • a fourth elastic member ( 14 ) is provided in a position overlapping the center of gravity P 1 in plan view.
  • the fourth elastic member ( 14 ) is made from rubber or urethan.
  • the fourth elastic member ( 14 ) provided in a position where the center of gravity is located can reduce warping of the intermediate plate ( 5 ) due to vibrations of the first compressor ( 10 ) and the second compressor ( 20 ).
  • the fourth elastic member ( 14 ) is provided in a position overlapping the center of gravity P 2 in plan view.
  • a first compressor ( 10 ), a second compressor ( 20 ), and a third compressor ( 70 ) are placed on an intermediate plate ( 5 ).
  • the intermediate plate ( 5 ) includes a first intermediate plate ( 15 ), a second intermediate plate ( 25 ), and a third intermediate plate ( 75 ) which are coupled integrally.
  • the second intermediate plate ( 25 ) is placed at a lower left corner of the first intermediate plate ( 15 ).
  • the third intermediate plate ( 75 ) is placed at an upper left corner of the first intermediate plate ( 15 ).
  • the second intermediate plate ( 25 ) and the third intermediate plate ( 75 ) are coupled integrally to the first intermediate plate ( 15 ), with the second intermediate plate ( 25 ) and the third intermediate plate ( 75 ) partially overlapped with the first intermediate plate ( 15 ) in plan view.
  • the second intermediate plate ( 25 ) has a coupling portion ( 28 ).
  • the coupling portion ( 28 ) is formed by bending an edge portion of the second intermediate plate ( 25 ) closer to the first intermediate plate ( 15 ) into a step-like shape.
  • the coupling portion ( 28 ) of the second intermediate plate ( 25 ) overlaps the first intermediate plate ( 15 ) in plan view.
  • the third intermediate plate ( 75 ) has a coupling portion ( 78 ).
  • the coupling portion ( 78 ) is formed by bending an edge portion of the third intermediate plate ( 75 ) closer to the first intermediate plate ( 15 ) into a step-like shape.
  • the coupling portion ( 78 ) of the third intermediate plate ( 75 ) overlaps the first intermediate plate ( 15 ) in plan view.
  • the first intermediate plate ( 15 ) and each of the coupling portions ( 28 ) and ( 78 ) of the second and third intermediate plates ( 25 ) and ( 75 ) are coupled integrally to each other by brazing or welding, for example.
  • the first intermediate plate ( 15 ) and each of the coupling portions ( 28 ) and ( 78 ) of the second and third intermediate plates ( 25 ) and ( 75 ) may be coupled integrally with a rivet or bolt.
  • the first compressor ( 10 ) is supported by the first intermediate plate ( 15 ) through a plurality of first elastic members ( 11 ).
  • the first compressor ( 10 ) is provided with a first supporting leg ( 16 ). Between the first supporting leg ( 16 ) and the first intermediate plate ( 15 ), three first elastic members ( 11 ) are provided.
  • a plurality of refrigerant circuit component parts ( 31 ) are placed on the first intermediate plate ( 15 ).
  • the refrigerant circuit component parts ( 31 ) are a utilization-side heat exchanger ( 37 ) and an accumulator ( 38 ).
  • the second compressor ( 20 ) is supported by the second intermediate plate ( 25 ) through a plurality of first elastic members ( 11 ).
  • the second compressor ( 20 ) is provided with a second supporting leg ( 26 ). Between the second supporting leg ( 26 ) and the second intermediate plate ( 25 ), three first elastic members ( 11 ) are provided.
  • the third compressor ( 70 ) is supported by the third intermediate plate ( 75 ) through a plurality of first elastic members ( 11 ).
  • the third compressor ( 70 ) is provided with a third supporting leg ( 76 ). Between the third supporting leg ( 76 ) and the third intermediate plate ( 75 ), three first elastic members ( 11 ) are provided.
  • first intermediate plate ( 15 ) and the bottom member ( 3 ) Between the first intermediate plate ( 15 ) and the bottom member ( 3 ), a plurality of second elastic members ( 12 ) are provided.
  • the second elastic members ( 12 ) are provided at four corners of the first intermediate plate ( 15 ).
  • the second elastic members ( 12 ) are provided at the upper left corner and the lower left corner of the second intermediate plate ( 25 ).
  • the second elastic members ( 12 ) are provided at the upper left corner and the lower left corner of the third intermediate plate ( 75 ).
  • the third compressor ( 70 ) can be added by making a minimum design change in which the third intermediate plate ( 75 ) is added and coupled integrally to the first intermediate plate ( 15 ).
  • a first compressor ( 10 ), a second compressor ( 20 ), and a third compressor ( 70 ) are placed on an intermediate plate ( 5 ).
  • the intermediate plate ( 5 ) includes the first intermediate plate ( 15 ) and the second intermediate plate ( 25 ).
  • the second intermediate plate ( 25 ) has a coupling portion ( 28 ).
  • the coupling portion ( 28 ) is formed by bending an edge portion of the second intermediate plate ( 25 ) closer to the first intermediate plate ( 15 ) into a step-like shape.
  • the coupling portion ( 28 ) of the second intermediate plate ( 25 ) overlaps the first intermediate plate ( 15 ) in plan view.
  • the intermediate plate ( 5 ) is configured by coupling integrally the first intermediate plate ( 15 ) and the coupling portion ( 28 ) of the second intermediate plate ( 25 ).
  • the first compressor ( 10 ) is supported by the first intermediate plate ( 15 ) through a plurality of first elastic members ( 11 ).
  • a plurality of refrigerant circuit component parts ( 31 ) are placed on the first intermediate plate ( 15 ).
  • the refrigerant circuit component parts ( 31 ) are a utilization-side heat exchanger ( 37 ) and an accumulator ( 38 ).
  • the second compressor ( 20 ) is supported by the second intermediate plate ( 25 ) through a plurality of first elastic members ( 11 ).
  • the third compressor ( 70 ) is supported by the second intermediate plate ( 25 ) through a plurality of first elastic members ( 11 ).
  • first intermediate plate ( 15 ) and the bottom member ( 3 ) Between the first intermediate plate ( 15 ) and the bottom member ( 3 ), a plurality of second elastic members ( 12 ) are provided.
  • the second elastic members ( 12 ) are provided at four corners of the first intermediate plate ( 15 ).
  • the second elastic members ( 12 ) are provided at the upper left corner and the lower left corner of the second intermediate plate ( 25 ).
  • the third compressor ( 70 ) can be added by making a minimum design change in which the second compressor ( 20 ) and the third compressor ( 70 ) are supported by the second intermediate plate ( 25 ).
  • the intermediate plate ( 5 ) includes a first intermediate plate ( 15 ), a second intermediate plate ( 25 ), and a third intermediate plate ( 75 ).
  • the second intermediate plate ( 25 ) has a coupling portion ( 28 ).
  • the coupling portion ( 28 ) is formed by bending an edge portion of the second intermediate plate ( 25 ) closer to the first intermediate plate ( 15 ) into a step-like shape.
  • the coupling portion ( 28 ) of the second intermediate plate ( 25 ) overlaps the first intermediate plate ( 15 ) in plan view.
  • the third intermediate plate ( 75 ) has a coupling portion ( 78 ).
  • the coupling portion ( 78 ) is formed by bending an edge portion of the third intermediate plate ( 75 ) closer to the second intermediate plate ( 25 ) into a step-like shape.
  • the coupling portion ( 78 ) of the third intermediate plate ( 75 ) overlaps the second intermediate plate ( 25 ) in plan view.
  • the coupling portion ( 28 ) of the second intermediate plate ( 25 ) is coupled integrally to the first intermediate plate ( 15 ).
  • the coupling portion ( 78 ) of the third intermediate plate ( 75 ) is coupled integrally to the second intermediate plate ( 25 ).
  • the intermediate plate ( 5 ) includes the first intermediate plate ( 15 ), the second intermediate plate ( 25 ), and the third intermediate plate ( 75 ) which are coupled integrally.
  • the first compressor ( 10 ) is supported by the first intermediate plate ( 15 ) through a plurality of first elastic members ( 11 ).
  • a plurality of refrigerant circuit component parts ( 31 ) are placed on the first intermediate plate ( 15 ).
  • the refrigerant circuit component parts ( 31 ) are a utilization-side heat exchanger ( 37 ) and an accumulator ( 38 ).
  • the second compressor ( 20 ) is supported by the second intermediate plate ( 25 ) through a plurality of first elastic members ( 11 ).
  • the third compressor ( 70 ) is supported by the second intermediate plate ( 25 ) through a plurality of first elastic members ( 11 ).
  • first intermediate plate ( 15 ) and the bottom member ( 3 ) Between the first intermediate plate ( 15 ) and the bottom member ( 3 ), a plurality of second elastic members ( 12 ) are provided.
  • the second elastic members ( 12 ) are provided at four corners of the first intermediate plate ( 15 ).
  • the second elastic members ( 12 ) are provided at the upper left corner and the lower left corner of the second intermediate plate ( 25 ).
  • the second elastic members ( 12 ) are provided at the upper left corner and the lower left corner of the third intermediate plate ( 75 ).
  • the third compressor ( 70 ) can be added by making a minimum design change in which the third intermediate plate ( 75 ) is added and coupled integrally to the other intermediate plates.
  • this embodiment describes a configuration with two or three compressors, the embodiment may be configured with four or more compressors.
  • the present disclosure is useful for a refrigeration cycle apparatus.

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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)
  • Compressor (AREA)
  • Air Conditioning Control Device (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Separation By Low-Temperature Treatments (AREA)
US17/956,477 2020-03-31 2022-09-29 Refrigeration cycle apparatus Pending US20230024725A1 (en)

Applications Claiming Priority (3)

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JP2020063763A JP7044983B2 (ja) 2020-03-31 2020-03-31 冷凍サイクル装置
JP2020-063763 2020-03-31
PCT/JP2021/010684 WO2021200129A1 (ja) 2020-03-31 2021-03-16 冷凍サイクル装置

Related Parent Applications (1)

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US20230024725A1 true US20230024725A1 (en) 2023-01-26

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EP (1) EP4113019B1 (de)
JP (1) JP7044983B2 (de)
CN (1) CN115349068A (de)
AU (1) AU2021249161B2 (de)
CA (1) CA3171967A1 (de)
WO (1) WO2021200129A1 (de)

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WO2023191093A1 (ja) * 2022-03-31 2023-10-05 ダイキン工業株式会社 冷凍サイクル装置

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Publication number Priority date Publication date Assignee Title
FR2503918B1 (fr) * 1981-04-09 1987-09-04 Commissariat Energie Atomique Barre absorbante pour reacteur nucleaire
JPS6034865Y2 (ja) * 1981-05-11 1985-10-17 株式会社東芝 空気調和機の室外ユニツトにおける圧縮機の支持装置
JPH081386Y2 (ja) * 1989-05-29 1996-01-17 三菱電機株式会社 空気調和機
JPH033636A (ja) * 1989-05-30 1991-01-09 Toshiba Corp 固定子鉄心の製造方法
JPH0544963A (ja) * 1991-01-17 1993-02-23 Mitsubishi Electric Corp 空気調和機
JP2000283600A (ja) 1999-03-30 2000-10-13 Toshiba Corp 空気調和装置
JP2008039260A (ja) 2006-08-03 2008-02-21 Sharp Corp 空気調和機用ユニット
KR20090048793A (ko) * 2007-11-12 2009-05-15 삼성전자주식회사 공기조화기
JP2010243033A (ja) 2009-04-03 2010-10-28 Mitsubishi Electric Corp ヒートポンプ室外機
JP6769085B2 (ja) 2016-04-25 2020-10-14 株式会社大林組 チューンドマスダンパー
JP6677267B2 (ja) * 2018-03-30 2020-04-08 ダイキン工業株式会社 冷凍サイクル装置

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CA3171967A1 (en) 2021-10-07
CN115349068A (zh) 2022-11-15
EP4113019A1 (de) 2023-01-04
EP4113019B1 (de) 2024-09-04
AU2021249161A1 (en) 2022-10-13
AU2021249161B2 (en) 2023-11-09
WO2021200129A1 (ja) 2021-10-07
JP2021162218A (ja) 2021-10-11
JP7044983B2 (ja) 2022-03-31

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