AU2021249161B2

AU2021249161B2 - Refrigeration cycle apparatus

Info

Publication number: AU2021249161B2
Application number: AU2021249161A
Authority: AU
Inventors: Kebi Chen; Kazushi Hisayama; Masao Ohno; Tetsuya Okamoto; Yoshinobu Tsumura; Masanori Ukibune
Original assignee: Daikin Industries Ltd
Current assignee: Daikin Industries Ltd
Priority date: 2020-03-31
Filing date: 2021-03-16
Publication date: 2023-11-09
Anticipated expiration: 2041-03-16
Also published as: US20230024725A1; AU2021249161A1; CA3171967A1; CN115349068A; EP4113019A1; EP4113019A4; JP7044983B2; WO2021200129A1; JP2021162218A

Abstract

An intermediate plate (5) is supported by a bottom member (3) with a plurality of second elastic members (12) therebetween. A first compressor (10) is supported by the intermediate plate (5) with a plurality of first elastic members (11) therebetween. A second compressor (20) is supported by the same intermediate plate (5) with the plurality of first elastic members (11) therebetween.

Description

DESCRIPTION REFRIGERATION CYCLE APPARATUS TECHNICAL FIELD

[0001] The present disclosure relates to a refrigeration cycle apparatus.

BACKGROUNDART

[0002] 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.

CITATION LIST PATENT DOCUMENT

[0003] PATENT DOCUMENT 1: Japanese Unexamined Patent Publication No. 2010-243033

SUMMARY

[0004] In a case where the refrigeration cycle is performed with a refrigerant compressed through two-stage compression or in a case where the compressor's capacity needs to be increased, it is required that a heat pump outdoor unit include a plurality of compressors.

[0005] However, in general, a machine chamber does not have much space inside, and therefore a degree of freedom of a layout for arranging two or more compressors in the machine chamber.

[0005a] It is an object of this invention to substantially overcome, or at least ameliorate, one or more disadvantage of existing arrangements, or provide a useful alternative.

42931599_1

[0005b] One aspect of the present disclosure provides a refrigeration cycle apparatus including: a housing having a bottom member; and a plurality of compressors accommodated in the housing, the plurality of compressors at least including a first compressor having a first supporting leg and a second compressor having a second supporting leg, thefirst supporting leg of the first compressor and the second supporting leg of the second compressor being supported by an intermediate plate through a plurality of first elastic members, the intermediate plate being supported by the bottom member through second elastic members, and the intermediate plate includes a first intermediate plate supporting the first supporting leg of the first compressor and a second intermediate plate supporting the second supporting leg of the second compressor, the first intermediate plate and the second intermediate plate being coupled integrally.

[0005c] According to another aspect of the present invention, there is provided a refrigeration cycle apparatus including: a housing having a bottom member; and a plurality of compressors accommodated in the housing, the plurality of compressors at least including a first compressor and a second compressor, the first compressor and the second compressor being supported by a same intermediate plate through a plurality of first elastic members, and the intermediate plate being supported by the bottom member through second elastic members.

[0006] Some embodiments of the present disclosure are intended to attain a more compact implementation area for a plurality of compressors.

[0007] 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).

42931599_1

2a

[0008] According to the first aspect, 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).

[0009] 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. In addition, since the overall weight of the structure supported by the second elastic members (12) is increased, the vibration isolation effect improves.

[0010]

A second aspect of the present disclosure is directed to the refrigeration cycle apparatus

of the first aspect, wherein the intermediate plate (5) includes a first intermediate plate (15)

supporting the first compressor (10) and a second intermediate plate (25) supporting the second

compressor (20), the first intermediate plate (15) and the second intermediate plate (25) being

coupled integrally.

[0011]

According to the second aspect, the intermediate plate (5) includes the first

intermediate plate (15) and the second intermediate plate (25) which are coupled integrally. The

first compressor (10) and the second compressor (20) are supported by the first intermediate

plate (15) and the second intermediate plate (25), respectively.

[0012]

This configuration facilitates attaining a more compact implementation area for the

first intermediate plate (15) and the second intermediate plate (25), compared with the case

where the first intermediate plate (15) and the second intermediate plate (25) are placed

separately from each other.

[0013]

A third aspect of the present disclosure is directed to the refrigeration cycle apparatus

of the second aspect, wherein the plurality of compressors further include a third compressor

(70), the third compressor (70) is supported by a third intermediate plate (75) through a first

elastic member (11), and 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.

[0014]

According to the third aspect, 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 third compressor (70) is supported by the third intermediate plate (75).

[0015]

Thus, 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.

[0016]

A fourth aspect of the present disclosure is directed to the refrigeration cycle apparatus

(70), and the third compressor (70) is supported by the second intermediate plate (25) through

a first elastic member (11).

[0017]

According to the fourth aspect, the third compressor (70) is supported by the second

intermediate plate (25) through the first elastic member (11). Thus, 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).

[0018]

A fifth aspect of the present disclosure is directed to the refrigeration cycle apparatus

of any one of the second to fourth aspects, wherein the first intermediate plate (15) and the

second intermediate plate (25) are coupled integrally, with the first intermediate plate (15) and

the second intermediate plate (25) partially overlapped with each other in plan view.

[0019]

According to the fifth aspect, the first intermediate plate (15) and the second

intermediate plate (25) are coupled integrally, with parts of the first intermediate plate (15) and

the second intermediate plate (25) overlapped with each other in plan view.

[0020]

This configuration allows the first intermediate plate (15) and the second intermediate

plate (25) to overlap each other in a greater area, thereby making it possible to ensure the rigidity

of the intermediate plate (5).

[0021]

A sixth aspect of the present disclosure is directed to the refrigeration cycle apparatus

of any one of the second to fifth aspects, wherein the first intermediate plate (15) and the second

intermediate plate (25) are coupled integrally by brazing or welding.

[0022]

According to the sixth aspect, the first intermediate plate (15) and the second

intermediate plate (25) are coupled integrally by brazing or welding.

[0023]

The first intermediate plate (15) and the second intermediate plate (25) are therefore

melted andjoined to each other, thereby improving ajoint strength of the intermediate plate (5).

[0024]

A seventh aspect of the present disclosure is directed to the refrigeration cycle

apparatus of any one of the second to fifth aspects, wherein the first intermediate plate (15) and

the second intermediate plate (25) are coupled integrally with a rivet or bolt.

[0025]

According to the seventh aspect, the first intermediate plate (15) and the second

intermediate plate (25) are coupled integrally with a rivet or bolt.

[0026]

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.

[0027]

An eighth aspect of the present disclosure is directed to the refrigeration cycle

the second intermediate plate (25) are coupled integrally via a third elastic member (13).

[0028]

According to the eighth aspect, the first intermediate plate (15) and the second

intermediate plate (25) are coupled integrally via the third elastic member (13).

[0029]

In this configuration, 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).

[0030]

A ninth aspect of the present disclosure is directed to the refrigeration cycle apparatus

of any one of the first to eighth aspects, wherein the second compressor (20) is lighter in weight

than the first compressor (10).

[0031]

According to the ninth aspect, the second compressor (20) is lighter in weight than the

first compressor (10), so that the vibration of the second compressor (20) can be reduced by the

weight of the first compressor (10).

[0032]

A tenth aspect of the present disclosure is directed to the refrigeration cycle apparatus

of any one of the first to ninth aspects, wherein assuming that P1 is a center of gravity of a

combination of the intermediate plate (5) and the plurality of compressors in plan view, that Q1 is a center of gravity of layout of the second elastic members (12) in plan view, and that r1 is a distance from the center of gravity P1 to a center of gravity of a nearest one of the plurality of compressors to the center of gravity P1, the center of gravity QI of the layout is located in an area having the center of gravity P1 as a center and the distance r1 as a radius.

[0033]

According to the tenth aspect, the center of gravity QI of the layout is located in an

area whose radius is the distance r1 from the center of gravity P1 to the center of gravity of the

nearest compressor to the center of gravity P1 in plan view.

[0034]

It is thus possible to obtain a double anti-vibration structure having a high vibration

control effect in consideration of the position of the center of gravity, while ensuring the degree

of freedom of the layout for arranging a plurality of compressors.

[0035]

An eleventh aspect of the present disclosure is directed to the refrigeration cycle

apparatus of the tenth aspect, wherein the center of gravity P1 substantially coincides with the

center of gravity Q Iof the layout in plan view.

[0036]

According to the eleventh aspect, the center of gravity P1 substantially coincides with

the center of gravity Q Iof the layout in plan view. It is thus possible to obtain a double anti

vibration structure having a high vibration control effect in consideration of the position of the

center of gravity, while ensuring the degree of freedom of the layout for arranging a plurality

of compressors.

[0037]

A twelfth aspect of the present disclosure is directed to the refrigeration cycle apparatus

of any one of the first to ninth aspects, wherein assuming that P2 is a center of gravity of a combination of the intermediate plate (5), the plurality of compressors, and a refrigerant circuit component part (31) placed on the intermediate plate (5) in plan view, that Q Iis a center of gravity of layout of the second elastic members (12) in plan view, and that r2 is a distance from the center of gravity P2 to a center of gravity of a nearest one of the plurality of compressors to the center of gravity P2, the center of gravity Q Iof the layout is located in an area having the center of gravity P2 as a center and the distance r2 as a radius.

[0038]

According to the twelfth aspect, the center of gravity Q Iof the layout is located in an

area whose radius is the distance r2 from the center of gravity P2 to the center of gravity of the

nearest compressor to the center of gravity P2 in plan view.

[0039]

of freedom of the layout for arranging a plurality of compressors.

[0040]

A thirteenth aspect of the present disclosure is directed to the refrigeration cycle

apparatus of the twelfth aspect, wherein the center of gravity P2 substantially coincides with

the center of gravity Q Iof the layout in plan view.

[0041]

According to the thirteenth aspect, the center of gravity P2 substantially coincides with

of compressors.

[0042]

A fourteenth aspect of the present disclosure is directed to the refrigeration cycle

apparatus of the tenth or eleventh aspect, wherein a fourth elastic member (14) is provided

between the intermediate plate (5) and the bottom member (3), the fourth elastic member (14)

being provided in a position overlapping the center of gravity P1 in plan view.

[0043]

According to the fourteenth aspect of the present disclosure, the fourth elastic member

(14) is provided between the intermediate plate (5) and the bottom member (3). The fourth

elastic member (14) is provided in a position overlapping the center of gravity P1 in the plan

view.

[0044]

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 compressor.

[0045]

A fifteenth aspect of the present disclosure is directed to the refrigeration cycle

apparatus of the twelfth or thirteenth aspect, wherein a fourth elastic member (14) is provided

being provided in a position overlapping the center of gravity P2 in plan view.

[0046]

According to the fifteenth aspect, the fourth elastic member (14) is provided between

the intermediate plate (5) and the bottom member (3). The fourth elastic member (14) is

provided in a position overlapping the center of gravity P2 in the plan view.

[0047]

The fourth elastic member provided in a position where the center of gravity is located

can reduce warping of the intermediate plate (5) due to vibrations of the compressor.

[0048]

A sixteenth aspect of the present disclosure is directed to the refrigeration cycle

apparatus of the first to fifteenth aspects, including: a control unit (100) configured to control

operations of the plurality of compressors, wherein the control unit (100) is configured to

control rotations of the plurality of compressors so that centrifugal forces generated in the

plurality of compressors cancel out each other.

[0049]

According to the sixteenth aspect, the centrifugal forces generated in the plurality of

compressors cancel out with each other by the control of the rotations of the plurality of

compressors.

[0050]

Thus, the vibrations generated in the plurality of compressors cancel out each other,

which makes it possible to further enhance the vibration isolation effect.

BRIEF DESCRIPTION OF THE DRAWINGS

[0051]

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.

DESCRIPTION OF EMBODIMENTS

[0052]

«First Embodiment»

As illustrated in FIG. 1, 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).

[0053]

[Refrigerant Circuit]

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).

[0054]

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.

[0055]

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).

[0056]

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.

[0057]

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).

By connecting an inlet end of the first suction pipe (51) with an outlet end of the 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.

[0058]

The number of rotations of the second compressor (20) is variable. For example, the

illustrated) connected to the second compressor (20). As a result, the number of rotations

(operation frequency) of the second compressor (20) changes.

[0059]

<Four-Way Switching Valve>

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 (P1) is

connected to the outlet end of the first discharge pipe (52). A second port (P2) is connected to

the inlet end of second suction pipe (53). A third port (P3) communicates with a gas-side end

of the heat-source-side heat exchanger (34). A fourth port (P4) communicates with a gas-side

end of the utilization-side heat exchanger (37).

[0060]

<Heat-Source-Side Heat Exchanger>

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.

[0061]

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. To an inlet side of the check

valve bridge (35), one end of a main liquid pipe (55) is connected. To an outlet side of the check

valve bridge (35), the other end of the main liquid pipe (55) is connected. 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).

[0062]

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).

[0063]

<Utilization-Side Heat Exchanger>

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 (37a) and a

second channel (37b). The first channel (37a) is a channel through which the refrigerant flows.

The second channel (37b) is a channel through which the water flows. The second channel (37b)

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 (37a) and the water flowing through the second channel (37b).

[0064]

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).

[0065]

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.

[0066]

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).

[0067]

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).

[0068]

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).

[0069]

The open/close valve (42) is switchable between an open state and a closed state. When

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). When 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).

[0070]

The intermediate heat exchanger (45) includes a third channel (45a) and a fourth

channel (45b). The third channel (45a) is connected to an intermediate portion of the main liquid

pipe (55). The fourth channel (45b) 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 (45a) and the refrigerant flowing through the fourth channel

(45b).

[0071]

[Sensor]

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).

[0072]

[Control Unit]

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.

[0073]

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.

[0074]

[Operation of Refrigeration Apparatus]

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.

[0075]

In the heating operation, 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.

[0076]

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 (45b), and is supercooled, in the third channel (45a) 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).

[0077]

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.

[0078]

On the other hand, 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 (45a) and evaporates in the fourth channel (45b) 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).

[0079]

In the cooling operation, 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. Specifically, 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.

[0080]

[Layouts of the Devices inside the Refrigeration Cycle Apparatus]

As illustrated in FIGS. 2 and 3, the refrigeration cycle apparatus (1) includes a housing

(2). The housing (2) has a bottom member (3) and a cover member (4).

[0081]

An interior of the housing (2) is partitioned into a heat exchange chamber (S1) and a

machine chamber (S2) by a partition (5). The cover member (4) covers the heat exchange

chamber (S1) and the machine chamber (S2). In the heat exchange chamber (S1), the heat

source-side heat exchanger (34) and the fan (39) are provided. As a result of operation of the

fan (39), heat exchange takes place between the refrigerant flowing through the heat-source

side heat exchanger (34) and the outdoor air.

[0082]

In the machine chamber (S2), the devices illustrated within the virtual frame line in

FIG. 1 are provided. Specifically, the machine chamber (S2) 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 (S2).

[0083]

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.

[0084]

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.

[0085]

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.

[0086]

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.

[0087]

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.

[0088]

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.

[0089]

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. In addition, since the overall weight of

the structure supported by the second elastic members (12) is increased, the vibration isolation

effect improves.

[0090]

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).

[0091]

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.

[0092]

In the example illustrated in FIG. 4, the four second elastic members (12) are identical

with each other in terms of the material, area, and thickness. Accordingly, the center of gravity

QI 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 comer 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.

[0093]

In the example illustrated 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. Thus, 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.

[0094]

The first compressor (10) has a cylindrical shape. The center of gravity C1 of the first

compressor (10) is an approximate point to the center of the circle in FIG. 4. In the illustration

of FIG. 4, the center of gravity Cl 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.

[0095]

The second compressor (20) has a cylindrical shape. The center of gravity C2 of the

second compressor (20) is an approximate point to the center of the circle in FIG. 4. In the

illustration of FIG. 4, the center of gravity C2 of the second compressor (20) coincides with the

center of gravity of the layout of the threefirst elastic members (11) supporting the second

supporting leg (26) in plan view.

[0096]

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.

The center of gravity P1 is located in the vicinity of the center of gravity Q Iof the layout of

the second elastic members (12) in plan view.

[0097]

Specifically, since the first compressor (10) is heavier in weight than the second

compressor (20), the center of gravity P1 is closer to the first compressor (10) than the center

of gravity Q Iof the layout. Thus, the first compressor (10) is the nearest compressor from the

center of gravity P. The distance from the center of gravity P1 to the first compressor (10) in

plan view will be referred to as a distance rl. The center of gravity QIof the layout is located

in an area having the center of gravity P1 as the center and the distance r1 as a radius. The center

of gravity P1 may substantially coincide with the center of gravity QI of the layout of the

second elastic members (12) in plan view.

[0098]

This makes it possible to obtain a double anti-vibration structure having a high

vibration control effect in consideration of the position of the center of gravity, while ensuring

the degree of freedom of the layout for arranging the first compressor (10) and second

compressor (20).

[0099]

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).

[0100]

For example, the control unit (100) may be configured to control thefirst compressor

(10) and the second compressor (20) so that they rotate in the same rotational direction and with

phases shifted by 1800. In this configuration, centrifugal forces generated in the first compressor

(10) and the second compressor (20) cancel out each other.

[0101]

Accordingly, 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.

[0102]

-Advantages of Embodiment

In a feature (1) of the embodiment, 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).

[0103]

According to the first feature of the embodiment, 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. In addition, since the overall weight of the structure supported by the second

elastic members (12) is increased, the vibration isolation effect improves.

[0104]

In a feature (2) of the embodiment, the second compressor (20) is lighter in weight

than the first compressor (10).

[0105]

According to the feature (2) of the embodiment, the vibration of the second compressor

(20) can be reduced by the weight of the first compressor (10).

[0106]

In a feature (3) of the embodiment, the center of gravity Q Iof the layout is located in

an area whose radius is the distance r1 from the center of gravity P1 to the center of gravity of

the nearest compressor to the center of gravity P1 in plan view.

[0107]

According to the feature (3) of the embodiment, it is possible to obtain a double anti

of compressors.

[0108]

In a feature (4) of the embodiment, the center of gravity P1 substantially coincides

with the center of gravity QIof the layout in plan view.

[0109]

According to the feature (4) of the embodiment, it is possible to obtain a double anti

of compressors.

[0110]

In a feature (5) of the embodiment, 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.

[0111]

According to the feature (5) of the embodiment, the vibrations generated in the

plurality of compressors cancel out each other, which makes it possible to further enhance the

vibration isolation effect.

[0112]

-Variations of First Embodiment

As illustrated in FIG. 5, a first compressor (10), a second compressor (20), and a

plurality of refrigerant circuit component parts (31) are placed on the intermediate plate (5). In

the example illustrated in FIG. 5, the refrigerant circuit component parts (31) are a utilization side heat exchanger (37) and an accumulator (38).

[0113]

In the example illustrated in FIG. 5, the center of gravity QIof 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.

[0114]

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 P2. The center of

gravity P2 is located in the vicinity of the center of gravity QIof the layout of the second elastic

members (12) in plan view.

[0115]

Specifically, the first compressor (10) and the second compressor (20) are located at

lower portions of FIG. 5, and therefore the center of gravity P2 is closer to the lower side than

the center of gravity QI of the layout. Moreover, since the first compressor (10) is heavier in

weight than the second compressor (20), the center of gravity P2 is closer to the first compressor

(10) than the center of gravity Q Iof the layout. Thus, the center of gravity P2 is closer to the

lower right side in FIG. 5 than the center of gravity QIof the layout.

[0116]

In this configuration, the first compressor (10) is the nearest compressor from the

center of gravity P2. The distance from the center of gravity P2 to the first compressor (10) in

plan view will be referred to as a distance r2. The center of gravity QIof the layout is located

in an area having the center of gravity P2 as the center and the distance r2 as a radius. The center

of gravity P2 may substantially coincide with the center of gravity QI of the layout of the second elastic members (12) in plan view.

[0117]

compressor (20).

[0118]

Although not illustrated in the drawings, 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). Examples

of 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.

[0119]

«Second Embodiment»

In the following description, the same reference characters designate the same

components as those of the first embodiment, and the description is focused only on the

difference.

[0120]

As illustrated in FIG. 6, 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).

[0121]

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).

[0122]

Specifically, 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).

[0123]

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).

[0124]

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).

[0125]

Alternatively, 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.

[0126]

«Third Embodiment»

As illustrated in FIG. 7, an intermediate plate (5) includes a first intermediate plate

members (11).

[0127]

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.

[0128]

Specifically, 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.

[0129]

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.

Alternatively, the first intermediate plate (15) and the coupling portion (28) of the second

intermediate plate (25) may be coupled integrally with a rivet or bolt.

[0130]

of the intermediate plate (5). The coupling portion (28) may be formed in thefirst intermediate plate (15).

[0131]

«Fourth Embodiment»

As illustrated in FIG. 8, an intermediate plate (5) includes a first intermediate plate

members (11).

[0132]

second intermediate plate (25) are coupled integrally to each other via a third elastic member

(13).

[0133]

[0134]

Between the coupling portion (28) of the second intermediate plate (25) and the first

intermediate plate (15), the third elastic member (13) is provided. 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).

[0135]

[0136]

«Fifth Embodiment»

As illustrated in FIGS. 9 and 10, 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. Between the intermediate plate (5) and a bottom

member (3), a fourth elastic member (14) is provided in a position overlapping the center of

gravity P1 in plan view. The fourth elastic member (14) is made from rubber or urethan.

[0137]

located can reduce warping of the intermediate plate (5) due to vibrations of the first compressor

(10) and the second compressor (20).

[0138]

Similarly in the case in which the first compressor (10), the second compressor (20),

the utilization-side heat exchanger (37), and the accumulator (38) are provided on the

intermediate plate (5) as illustrated in FIG. 5, the fourth elastic member (14) is provided in a

position overlapping the center of gravity P2 in plan view.

[0139]

«Sixth Embodiment»

As illustrated in FIG. 11, 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.

[0140]

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.

[0141]

[0142]

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.

[0143]

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. Alternatively, 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.

[0144]

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). In the example illustrated in FIG. 11, the

refrigerant circuit component parts (31) are a utilization-side heat exchanger (37) and an

accumulator (38).

[0145]

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.

[0146]

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.

[0147]

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 comers of the first intermediate plate (15).

[0148]

Between the second intermediate plate (25) and the bottom member (3), a plurality of

second elastic members (12) are provided. The second elastic members (12) are provided at the upper left corner and the lower left corner of the second intermediate plate (25).

[0149]

Between the third intermediate plate (75) and the bottom member (3), a plurality of

second elastic members (12) are provided. The second elastic members (12) are provided at the

upper left corner and the lower left corner of the third intermediate plate (75).

[0150]

which the third intermediate plate (75) is added and coupled integrally to the first intermediate

plate (15).

[0151]

«Seventh Embodiment»

As illustrated in FIG. 12, 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).

[0152]

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).

[0153]

plurality of first elastic members (11). A plurality of refrigerant circuit component parts (31) are

placed on the first intermediate plate (15). In the example illustrated in FIG. 12, the refrigerant circuit component parts (31) are a utilization-side heat exchanger (37) and an accumulator (38).

[0154]

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).

[0155]

four comers of the first intermediate plate (15).

[0156]

upper left corner and the lower left corner of the second intermediate plate (25).

[0157]

which the second compressor (20) and the third compressor (70) are supported by the second

intermediate plate (25).

[0158]

«Eighth Embodiment»

As illustrated in FIG. 13, 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).

[0159]

(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.

[0160]

(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.

[0161]

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). Thus, 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.

[0162]

placed on the first intermediate plate (15). In the example illustrated in FIG. 13, the refrigerant

circuit component parts (31) are a utilization-side heat exchanger (37) and an accumulator (38).

[0163]

intermediate plate (25) through a plurality of first elastic members (11).

[0164]

second elastic members (12) are provided. The second elastic members (12) are provided at four comers of the first intermediate plate (15).

[0165]

[0166]

[0167]

plates.

[0168]

«Other Embodiments>>

The above-described embodiments may be modified as follows.

[0169]

Even though this embodiment describes a configuration with two or three compressors,

the embodiment may be configured with four or more compressors.

[0170]

While the embodiments and variations have been described above, it will be

understood that various changes in form and details can be made without departing from the

spirit and scope of the claims. The above embodiments and variations may be appropriately

combined or modified by replacing the elements thereof as long as the functions of the subject

matters of the present disclosure are not impaired. In addition, the expressions of "first,"

"second," and "third" in the specification and claims are used to distinguish the terms to which these expressions are given, and do not limit the number and order of the terms.

INDUSTRIAL APPLICABILITY

[0171] As described above, the present disclosure is useful for a refrigeration cycle apparatus.

[0171a] The term "comprise" and variants of that term such as "comprises" or "comprising" are used herein to denote the inclusion of a stated integer or integers but not to exclude any other integer or any other integers, unless in the context or usage an exclusive interpretation of the term is required.

DESCRIPTION OF REFERENCE CHARACTERS

[0172] 1 Refrigeration Cycle Apparatus 2 Housing 3 Bottom Member 5 Intermediate Plate 10 First Compressor 11 First Elastic Member 12 Second Elastic Member 13 Third Elastic Member 14 Fourth Elastic Member 15 First Intermediate Plate 20 Second Compressor 25 Second Intermediate Plate 31 Refrigerant Circuit Component Part 70 Third Compressor 75 Third Intermediate Plate 100 Control Unit P1 Center of Gravity P2 Center of Gravity Qi Center of Gravity of Layout

Claims

CLAIMS:

1. A refrigeration cycle apparatus including: a housing having a bottom member; and a plurality of compressors accommodated in the housing, the plurality of compressors at least including a first compressor having a first supporting leg and a second compressor having a second supporting leg, the first supporting leg of the first compressor and the second supporting leg of the second compressor being supported by an intermediate plate through a plurality offirst elastic members, the intermediate plate being supported by the bottom member through second elastic members, and the intermediate plate includes a first intermediate plate supporting the first supporting leg of the first compressor and a second intermediate plate supporting the second supporting leg of the second compressor, the first intermediate plate and the second intermediate plate being coupled integrally.

2. The refrigeration cycle apparatus of claim 1, wherein the plurality of compressors further include a third compressor, the third compressor is supported by a third intermediate plate through a first elastic member, and the intermediate plate includes the first intermediate plate, the second intermediate plate, and the third intermediate plate which are coupled integrally.

3. The refrigeration cycle apparatus of claim 1, wherein the plurality of compressors further include a third compressor, and the third compressor is supported by the second intermediate plate through a first elastic member.

4. The refrigeration cycle apparatus of any one of claims I to 3, wherein the first intermediate plate and the second intermediate plate are coupled integrally, with the first intermediate plate and the second intermediate plate partially overlapped with each other in plan view.

5. The refrigeration cycle apparatus of any one of claims 1 to 4, wherein

42931610_1 the first intermediate plate and the second intermediate plate are coupled integrally by brazing or welding.

6. The refrigeration cycle apparatus of any one of claims 1 to 4, wherein the first intermediate plate and the second intermediate plate are coupled integrally with a rivet or bolt.

7. The refrigeration cycle apparatus of any one of claims 1 to 4, wherein the first intermediate plate and the second intermediate plate are coupled integrally via a third elastic member.

8. The refrigeration cycle apparatus of any one of claims I to 7, wherein the second compressor is lighter in weight than the first compressor.

9. The refrigeration cycle apparatus of any one of claims 1 to 8, wherein assuming that P1 is a center of gravity of a combination of the intermediate plate and the plurality of compressors in plan view, that Q Iis a center of gravity of layout of the second elastic members in plan view, and that r1 is a distance from the center of gravity P1 to a center of gravity of a nearest one of the plurality of compressors to the center of gravity P1, the center of gravity Q Iof the layout is located in an area having the center of gravity P1 as a center and the distance r Ias a radius.

10. The refrigeration cycle apparatus of claim 9, wherein the center of gravity P1 substantially coincides with the center of gravity Q1 of the layout in plan view.

11. The refrigeration cycle apparatus of any one of claims 1 to 8, wherein assuming that P2 is a center of gravity of a combination of the intermediate plate, the plurality of compressors, and a refrigerant circuit component part placed on the intermediate plate in plan view, that Q Iis a center of gravity of layout of the second elastic members in plan view, and that r2 is a distance from the center of gravity P2 to a center of gravity of a nearest one of the plurality of compressors to the center of gravity P2, the center of gravity Q Iof the layout is located in an area having the center of gravity P2 as a center and the distance r2 as a radius.

42931610_1

12. The refrigeration cycle apparatus of claim 11, wherein the center of gravity P2 substantially coincides with the center of gravity Q1 of the layout in plan view.

13. The refrigeration cycle apparatus of claim 9 or 10, wherein a fourth elastic member is provided between the intermediate plate and the bottom member, the fourth elastic member being provided in a position overlapping the center of gravity P1 in plan view.

14. The refrigeration cycle apparatus of claim 11 or 12, wherein a fourth elastic member is provided between the intermediate plate and the bottom member, the fourth elastic member being provided in a position overlapping the center of gravity P2 in plan view.

15. The refrigeration cycle apparatus of any one of claims I to 14, further including: a control unit configured to control operations of the plurality of compressors, wherein the control unit is configured to control rotations of the plurality of compressors so that centrifugal forces generated in the plurality of compressors cancel out each other.

Daikin Industries, Ltd.

Patent Attorneys for the Applicant/Nominated Person

SPRUSON&FERGUSON

42931610 1