CN115349068A

CN115349068A - Refrigeration cycle device

Info

Publication number: CN115349068A
Application number: CN202180020724.0A
Authority: CN
Inventors: 大野正雄; 冈本哲也; 久山和志; 陈柯壁; 津村宜伸; 浮舟正伦
Original assignee: Daikin Industries Ltd
Current assignee: Daikin Industries Ltd
Priority date: 2020-03-31
Filing date: 2021-03-16
Publication date: 2022-11-15
Also published as: EP4113019A1; JP7044983B2; US20230024725A1; EP4113019A4; AU2021249161B2; CA3171967A1; WO2021200129A1; AU2021249161A1; JP2021162218A

Abstract

The intermediate plate (5) is supported on the base (3) via a plurality of second elastic members (12). The first compressor (10) is supported by the intermediate plate (5) via a plurality of first elastic members (11). The second compressor (20) is supported on the same intermediate plate (5) via a plurality of first elastic members (11).

Description

Refrigeration cycle device

Technical Field

The present disclosure relates to a refrigeration cycle apparatus.

Background

Patent document 1 discloses a heat pump outdoor unit including a first vibration-proof support portion provided on a bottom plate of a machine room, and an intermediate base supported by the first vibration-proof support portion and having a second vibration-proof support portion to which legs of a compressor are attached.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2010-243033

Disclosure of Invention

Technical problems to be solved by the invention

However, when a refrigeration cycle is performed by performing two-stage compression of a refrigerant or when the capacity of a compressor is to be increased, a plurality of compressors need to be installed in the heat pump outdoor unit.

However, in general, the empty space inside the machine room is small, and the degree of freedom of layout for arranging two or more compressors is small.

The purpose of the present disclosure is: the installation area for installing a plurality of compressors is compact.

Technical solutions for solving technical problems

A first aspect of the present disclosure relates to a refrigeration cycle apparatus including a casing 2 having a bottom member 3, and a plurality of compressors accommodated in the casing 2, the plurality of compressors including at least a first compressor 10 and a second compressor 20, the first compressor 10 and the second compressor 20 being supported on the same intermediate plate 5 via a plurality of first elastic members 11, the intermediate plate 5 being supported on the bottom member 3 via a second elastic member 12.

In the first aspect, the intermediate plate 5 is supported on the bottom member 3 via the second elastic member 12. The first compressor 10 and the second compressor 20 are supported on the same intermediate plate 5 via a plurality of first elastic members 11.

This makes it possible to reduce the installation area as compared with the case where the first compressor 10 and the second compressor 20 are separately provided. In addition, since the total weight of the structure supported by the second elastic member 12 increases, the vibration-proof effect is improved.

In a second aspect of the present disclosure, in addition to the first aspect, the intermediate plate 5 is formed by integrally connecting a first intermediate plate 15 and a second intermediate plate 25, the first compressor 10 is supported by the first intermediate plate 15, and the second compressor 20 is supported by the second intermediate plate 25.

In the second aspect, the intermediate plate 5 is formed by integrally connecting the first intermediate plate 15 and the second intermediate plate 25. The first compressor 10 and the second compressor 20 are supported on the first intermediate plate 15 and the second intermediate plate 25, respectively.

This can make the installation area compact as compared with the case where the first intermediate plate 15 and the second intermediate plate 25 are separately provided.

In the third aspect of the present disclosure, in addition to the second aspect, the plurality of compressors further includes a third compressor 70, the third compressor 70 is supported by a third intermediate plate 75 via a first elastic member 11, and the intermediate plate 5 is formed by integrally connecting the first intermediate plate 15, the second intermediate plate 25, and the third intermediate plate 75.

In the third aspect, the intermediate plate 5 is formed by integrally connecting the first intermediate plate 15, the second intermediate plate 25, and the third intermediate plate 75. The third compressor 70 is supported on a third intermediate plate 75.

Thus, the third compressor 70 can be added by the minimum design change of adding the third intermediate plate 75 and integrally connecting it to another intermediate plate.

A fourth aspect of the present disclosure is the second aspect, wherein the plurality of compressors further includes a third compressor 70, and the third compressor 70 is supported on the second intermediate plate 25 via a first elastic member 11.

In the fourth aspect, the third compressor 70 is supported on the second intermediate plate 25 via the first elastic member 11. Thus, the third compressor 70 can be added by the minimum design change of supporting the second compressor 20 and the third compressor 70 on the second intermediate plate 25.

A fifth aspect of the present disclosure is the second aspect, wherein the first intermediate plate 15 and the second intermediate plate 25 are integrally connected to each other in a state where a part of the plates overlaps each other when viewed from a top view.

In the fifth aspect, the first intermediate plate 15 and the second intermediate plate 25 are integrally connected to each other in a state in which a part of them overlap each other in a plan view.

This increases the area of the first intermediate plate 15 overlapping the second intermediate plate 25, and ensures the rigidity of the intermediate plate 5.

A sixth aspect of the present disclosure is based on any one of the second to fifth aspects, wherein the first intermediate plate 15 and the second intermediate plate 25 are joined integrally by brazing or welding.

In the sixth aspect, the first intermediate plate 15 and the second intermediate plate 25 are joined integrally by brazing or welding.

Thereby, the first intermediate plate 15 and the second intermediate plate 25 are fused and joined, and therefore the joining strength of the intermediate plate 5 can be improved.

A seventh aspect of the present disclosure is the seventh aspect of any one of the second to fifth aspects, wherein the first intermediate plate 15 and the second intermediate plate 25 are integrally joined by rivets or bolts.

In the seventh aspect, the first intermediate plate 15 and the second intermediate plate 25 are integrally joined by rivets or bolts.

This makes it possible to easily perform the operation of integrally connecting the first intermediate plate 15 and the second intermediate plate 25.

An eighth aspect of the present disclosure is the eighth aspect, wherein the first intermediate plate 15 and the second intermediate plate 25 are integrally connected via a third elastic member 13.

In the eighth aspect, the first intermediate plate 15 and the second intermediate plate 25 are integrally coupled via the third elastic member 13.

This allows the third elastic member 13 to reduce the difference in displacement caused by the vibration generated in each of the first intermediate plate 15 and the second intermediate plate 25.

A ninth aspect of the present disclosure is based on any one of the first to eighth aspects, wherein the second compressor 20 has a smaller weight than the first compressor 10.

In the ninth aspect, since the weight of the second compressor 20 is smaller than the weight of the first compressor 10, the vibration of the second compressor 20 can be reduced by the weight of the first compressor 10.

A tenth aspect of the present disclosure is the first aspect to the ninth aspect, wherein a center of gravity of a combination of the intermediate plate 5 and the plurality of compressors as viewed in plan is P1, an arrangement center of gravity of the second elastic member 12 as viewed in plan is Q1, a distance from the center of gravity P1 to a center of gravity of the compressor located closest to the center of gravity P1 as viewed in plan is r1, and the arrangement center of gravity Q1 is located in a region centered on the center of gravity P1 and having a radius of the distance r1.

In the tenth aspect, the center of gravity Q1 is arranged within a region having a radius of a distance r1 from the center of gravity P1 to the center of gravity of the closest compressor as viewed in plan.

Thus, a double vibration-proof structure can be constructed which ensures a degree of freedom in layout for arranging the plurality of compressors and takes into account a high vibration-proof effect of the position of the center of gravity.

An eleventh aspect of the present disclosure is the tenth aspect, wherein the center of gravity P1 substantially coincides with the arrangement center of gravity Q1 as viewed from a top view.

In the eleventh aspect, the center of gravity P1 substantially coincides with the arrangement center of gravity Q1 as viewed from above. Thus, a double vibration-proof structure can be constructed which ensures a degree of freedom in layout for arranging the plurality of compressors and takes into account a high vibration-proof effect of the position of the center of gravity.

A twelfth aspect of the present disclosure is the first aspect to the ninth aspect, wherein a center of gravity of a combination of the intermediate plate 5, the plurality of compressors, and the refrigerant circuit constituting member 31 disposed on the intermediate plate 5 in a plan view is P2, an arrangement center of gravity of the second elastic member 12 in a plan view is Q1, a distance from the center of gravity P2 to a center of gravity of the compressor located closest to the center of gravity P2 in a plan view is r2, and the arrangement center of gravity Q1 is located in a region centered on the center of gravity P2 and having a radius of the distance r2.

In the twelfth aspect, the center of gravity Q1 is arranged within a region having a radius of a distance r2 from the center of gravity P2 to the center of gravity of the closest compressor as viewed in plan.

A thirteenth aspect of the present disclosure is the twelfth aspect, wherein the center of gravity P2 substantially coincides with the arrangement center of gravity Q1 as viewed from above.

In the thirteenth aspect, the center of gravity P2 substantially coincides with the arrangement center of gravity Q1 as viewed from above. Thus, a double vibration-proof structure can be constructed which ensures a degree of freedom in layout for arranging a plurality of compressors and which takes into account a high vibration-proof effect of the position of the center of gravity.

A fourteenth aspect of the present disclosure is the tenth or eleventh aspect, wherein a fourth elastic member 14 is disposed between the intermediate plate 5 and the bottom member 3 at a position overlapping the center of gravity P1 in a plan view.

In the fourteenth aspect, a fourth elastic member 14 is disposed between the intermediate plate 5 and the bottom member 3. The fourth elastic member 14 is disposed at a position that coincides with the center of gravity P1 as viewed from above.

Thus, the bending of the intermediate plate 5 due to the vibration of the compressor can be reduced by arranging the fourth elastic member 14 in accordance with the position of the center of gravity.

A fifteenth aspect of the present disclosure is, in addition to the twelfth or thirteenth aspect, a fourth elastic member 14 is disposed between the intermediate plate 5 and the bottom member 3 at a position coinciding with the center of gravity P2 in a plan view.

In the fifteenth aspect, a fourth elastic member 14 is arranged between the intermediate plate 5 and the bottom member 3. The fourth elastic member 14 is disposed at a position that coincides with the center of gravity P2 as viewed from above.

Thus, by arranging the fourth elastic member in accordance with the position of the center of gravity, the bending of the intermediate plate 5 due to the vibration of the compressor can be reduced.

A sixteenth aspect of the present disclosure is the refrigeration cycle apparatus according to any one of the first to fifteenth aspects, wherein the control unit 100 controls the operation of the plurality of compressors, and the control unit 100 controls the rotation of the plurality of compressors so that centrifugal forces generated by the plurality of compressors cancel each other out.

In the sixteenth aspect, the rotation of the plurality of compressors is controlled so that centrifugal forces generated by the plurality of compressors cancel each other out.

Thus, since the vibrations generated by the plurality of compressors cancel each other out, the vibration-proof effect can be further improved.

Drawings

Fig. 1 is a piping diagram illustrating a configuration of a refrigeration cycle device according to the first embodiment by way of example;

fig. 2 is a front view showing the structure of the refrigeration cycle device;

fig. 3 is a plan view showing the structure of the refrigeration cycle device;

fig. 4 is a plan view illustrating an arrangement of the first compressor and the second compressor;

fig. 5 is a view corresponding to fig. 4 according to a modification of the first embodiment;

fig. 6 is a front view showing the configuration of a refrigeration cycle apparatus according to a second embodiment;

fig. 7 is a front view showing the configuration of a refrigeration cycle apparatus according to the third embodiment;

fig. 8 is a front view showing a configuration of a refrigeration cycle apparatus according to a fourth embodiment;

fig. 9 is a front view showing the structure of a refrigeration cycle device according to a fifth embodiment;

fig. 10 is a plan view showing the structure of the refrigeration cycle device;

fig. 11 is a plan view showing the arrangement of the respective devices on the intermediate plate in the refrigeration cycle apparatus according to the sixth embodiment;

fig. 12 is a plan view showing the arrangement of the devices on the intermediate plate in the refrigeration cycle apparatus according to the seventh embodiment;

fig. 13 is a plan view showing the arrangement of the devices on the intermediate plate in the refrigeration cycle apparatus according to the eighth embodiment.

Detailed Description

(first embodiment)

As shown in fig. 1, a refrigeration cycle apparatus 1 heats a target fluid. The fluid as the object is water. The refrigeration cycle apparatus 1 supplies heated water to a hot water supply tank, a heating coil, a floor heating coil, and other devices used. The refrigeration cycle apparatus 1 cools a target fluid. The subject fluid is water. The refrigeration cycle apparatus 1 supplies the cooled water to the equipment such as the coil for cooling. The refrigeration cycle apparatus 1 includes a refrigerant circuit 30 and a control unit 100.

[ refrigerant circuit ]

The refrigerant circuit 30 includes a first compressor 10, a second compressor 20, a four-way selector valve 33, a heat source side heat exchanger 34, a check valve bridge 35, an expansion valve 36, a use side heat exchanger 37, an accumulator 38, and an intermediate heat exchanger 45.

The refrigerant circuit 30 is filled with a refrigerant. In the refrigerant circuit 30, a refrigeration cycle is performed by a refrigerant cycle. The refrigerant is, for example, R410A, R, R407C, or the like.

First compressor

The first compressor 10 is, for example, a scroll compressor. The first compressor 10 is disposed at a discharge side of the second compressor 20. A first suction pipe 51 and a first discharge pipe 52 are connected to the first compressor 10. The first compressor 10 compresses a refrigerant sucked in and discharges the compressed refrigerant. The capacity of the first compressor 10 is greater than the capacity of the second compressor 20.

The rotational speed of the first compressor 10 is variable. For example, the rotational speed of the motor is changed by changing the output frequency of an inverter (not shown) connected to the first compressor 10. As a result, the rotation speed (operation frequency) of the first compressor 10 changes.

Second compressor

The second compressor 20 is, for example, a scroll compressor. The second compressor 20 is disposed at a suction side of the first compressor 10. A second suction pipe 53 and a second discharge pipe 54 are connected to the second compressor 20. The connection pipe 50 is constructed by connecting an inflow end of the first suction pipe 51 with an outflow end of the second discharge pipe 54. The second compressor 20 is connected in series with the first compressor 10 via a connection pipe 50. The second compressor 20 compresses the sucked refrigerant and discharges the compressed refrigerant.

The rotational speed of the second compressor 20 is variable. For example, the rotational speed of the motor is changed by changing the output frequency of an inverter (not shown) connected to the second compressor 20. As a result, the rotation speed (operation frequency) of the second compressor 20 changes.

Four-way change valve

The four-way selector valve 33 is an electric selector valve. The four-way selector valve 33 is switched between a first state (shown by the solid line in fig. 1) and a second state (shown by the broken line in fig. 1). The first port P1 is connected to the outflow end of the first exhaust pipe 52. The second valve port P2 is connected to an inflow end of the second suction pipe 53. The third valve port P3 communicates with the gas-side end of the heat source-side heat exchanger 34. The fourth valve port P4 communicates with the air-side end of the use-side heat exchanger 37.

Heat source side heat exchanger

The heat source side heat exchanger 34 is an outdoor heat exchanger. A fan 39 is disposed in the vicinity of the heat source side heat exchanger 34. By driving the fan 39, the refrigerant in the heat source side heat exchanger 34 exchanges heat with the outdoor air.

Non-return valve bridge

The check valve bridge 35 has four check valves C. The four check valves C allow the refrigerant to flow in the directions indicated by the arrows of fig. 1, respectively, and restrict the refrigerant from flowing in the opposite directions thereof. The inflow side of the check valve bridge 35 is connected to one end of the main liquid pipe 55. The outflow side of the check valve bridge 35 is connected to the other end of the main liquid pipe 55. The check valve bridge 35 communicates with the liquid-side end of the heat source-side heat exchanger 34 and the liquid-side end of the use-side heat exchanger 37.

Expansion valve

The expansion valve 36 expands the refrigerant, thereby reducing the pressure of the refrigerant. The expansion valve 36 is an electronic expansion valve with an adjustable opening degree. The expansion valve 36 is connected to the main liquid pipe 55.

Utilization side heat exchanger

The use side heat exchanger 37 exchanges heat between the refrigerant and water. The use side heat exchanger 37 has a first flow path 37a and a second flow path 37b. The first flow path 37a is a flow path through which the refrigerant flows. The second flow path 37b is a flow path through which the supply water flows. The second channel 37b is connected to a middle of the usage-side circuit 65 included in the usage equipment not shown. In the use side heat exchanger 37, the refrigerant flowing through the first flow path 37a exchanges heat with the water flowing through the second flow path 37b.

Liquid reservoir

The accumulator 38 is connected to the middle of the second suction pipe 53. The accumulator 38 is a gas-liquid separator. Within the accumulator 38, the refrigerant is separated into liquid refrigerant and gaseous refrigerant. The accumulator 38 is configured to flow only the gaseous refrigerant out of the accumulator 38.

Bypass circuit

The bypass circuit 60 has a bypass pipe PB and a bypass check valve 61. The bypass pipe 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 toward the connection pipe 50 and restricts the refrigerant from flowing in the opposite direction thereof.

Injection circuit

The injection circuit 40 is a circuit that supplies a part of the refrigerant flowing through the main liquid pipe 55 to the suction side of the first compressor 10. The injection circuit 40 has an injection pipe PJ, an injection expansion valve 41, and an on-off valve 42.

One end of the injection pipe PJ is connected to a portion of the main liquid pipe 55 between the expansion valve 36 and the check valve bridge 35. The other end of the injection pipe PJ branches into two pipes, and is connected to the first suction pipe 51 and the compression chamber of the first compressor 10 during compression, respectively.

The injection expansion valve 41 is connected to the injection pipe PJ at a position upstream of the intermediate heat exchanger 45. The injection expansion valve 41 decompresses the refrigerant flowing through the injection pipe PJ.

The on-off valve 42 can be switched between an open state and a closed state. By opening the on-off valve 42, a part of the refrigerant flowing through the injection pipe PJ is supplied to the suction side of the first compressor 10. By closing the on-off valve 42, the refrigerant flowing through the injection pipe PJ is supplied to the compression chamber of the first compressor 10 during compression.

Intermediate heat exchanger

The intermediate heat exchanger 45 has a third flow path 45a and a fourth flow path 45b. The third flow path 45a is connected to the middle of the main liquid pipe 55. The fourth flow path 45b is connected to the middle of the injection pipe PJ. In the intermediate heat exchanger 45, the refrigerant flowing through the third flow path 45a exchanges heat with the refrigerant flowing through the fourth flow path 45b.

[ sensor ]

The refrigeration cycle apparatus 1 includes various sensors such as a temperature sensor for detecting the temperature of the refrigerant and a pressure sensor for detecting the pressure of the refrigerant. Signals indicating the detection results of the various sensors are transmitted to the control unit 100.

[ control section ]

The refrigeration cycle apparatus 1 includes a control unit 100. The control unit 100 includes a microcomputer and a storage device storing software for operating the microcomputer.

The control unit 100 controls the refrigerant circuit 30 based on signals from various sensors and control signals from the outside. The control unit 100 outputs control signals to the first compressor 10, the second compressor 20, the four-way selector valve 33, the expansion valve 36, the injection expansion valve 41, the on-off valve 42, and the like. Detection values of various sensors are input to the control unit 100.

[ operation of refrigerating apparatus ]

In the refrigeration cycle apparatus 1, a heating operation and a cooling operation are performed. In the refrigeration cycle apparatus 1, the first compressor 10 functions as a high-stage compressor, and the second compressor 20 functions as a low-stage compressor.

Heating operation

In the heating operation, a refrigeration cycle is performed in which the use side heat exchanger 37 serves as a condenser (radiator) and the heat source side heat exchanger 34 serves as an evaporator. Specifically, the four-way selector valve 33 is set to the first position.

The refrigerant discharged from the first compressor 10 passes through the four-way selector valve 33, and is then released to water in the use side heat exchanger 37 and condensed. The refrigerant flowing out of the use side heat exchanger 37 passes through the check valve bridge 35 and flows through the main liquid pipe 55. The refrigerant flowing through the main liquid pipe 55 releases heat to the refrigerant flowing through the fourth flow path 45b in the third flow path 45a of the intermediate heat exchanger 45, and is supercooled. Then, a part of the refrigerant flowing through the main liquid pipe 55 flows into the injection pipe PJ, and the rest of the refrigerant is decompressed by the expansion valve 36 of the main liquid pipe 55.

The refrigerant after pressure reduction passes through the check valve bridge 35 and is evaporated in the heat source side heat exchanger 34. The refrigerant flowing out of the heat source side heat exchanger 34 passes through the four-way selector valve 33 and the accumulator 38 in this order, is then drawn into the second compressor 20 and compressed. The refrigerant discharged from the second compressor 20 is sucked into the first compressor 10 and compressed.

On the other hand, the refrigerant flowing into the injection pipe PJ is decompressed by the injection expansion valve 41, and then absorbs heat from the refrigerant flowing through the third flow path 45a and evaporates in the fourth flow path 45b of the intermediate heat exchanger 45. Then, the refrigerant flowing in the injection pipe PJ is introduced into the first suction pipe 51 of the first compressor 10.

Cooling operation

In the cooling operation, a refrigeration cycle is performed in which the heat source side heat exchanger 34 serves as a condenser (radiator) and the use side heat exchanger 37 serves as an evaporator. Specifically, the four-way selector valve 33 is set to the second position. The description of the flow of the refrigerant during the cooling operation is omitted.

[ arrangement of respective devices in the refrigeration cycle apparatus ]

As shown in fig. 2 and 3, the refrigeration cycle device 1 includes a casing 2. The case 2 has a bottom member 3 and a cover member 4.

The interior of the casing 2 is divided by a partition 5 into a heat exchange chamber S1 and a machine chamber S2. The cover member 4 covers the heat exchange chamber S1 and the machine chamber S2. A heat source side heat exchanger 34 and a fan 39 are arranged in the heat exchange chamber S1. By driving the fan 39, the refrigerant flowing through the heat source side heat exchanger 34 exchanges heat with the outdoor air.

In the machine room S2, a plurality of devices enclosed with a virtual frame line in fig. 1 are arranged. Specifically, the first compressor 10, the second compressor 20, and the refrigerant circuit constituting member 31 constituting the refrigerant circuit 30 are arranged in the machine room S2. The control unit 100 is disposed in the machine room S2, and is not shown.

The first compressor 10 is supported by the intermediate plate 5 via a plurality of first elastic members 11. Specifically, the first compressor 10 has a first support leg 16. Three first elastic elements 11 are arranged between the first supporting feet 16 and the intermediate plate 5.

The second compressor 20 is supported on the same intermediate plate 5 via a plurality of first elastic members 11. Specifically, the second compressor 20 has a second support leg 26. Three first elastic members 11 are arranged between the second supporting leg 26 and the intermediate plate 5.

The first elastic member 11 may be formed of a single large member or may be divided into two or more members as long as it can support the first compressor 10 and the second compressor 20. The first elastic member 11 is made of rubber or polyurethane.

The intermediate plate 5 is supported on the bottom member 3 of the housing 2 via a plurality of second elastic members 12. Four second elastic members 12 are arranged between the intermediate plate 5 and the bottom member 3. The second elastic members 12 are arranged at the four corners of the intermediate plate 5, respectively.

The second elastic member 12 may be formed of a large single piece, or may be divided into two or more pieces. The second elastic member 12 is made of rubber or polyurethane. The material and spring constant of the first elastic member 11 and the material and spring constant of the second elastic member 12 may be the same as or different from each other.

The first and

second compressors

10 and 20 are disposed on a double vibration-proof structure achieved via the first elastic member 11, the middle plate 5, and the second elastic member 12. Therefore, even if the first compressor 10 and the second compressor 20 vibrate during operation of the refrigeration cycle apparatus 1, transmission of vibration and generation of noise can be suppressed.

The first compressor 10 and the second compressor 20 are supported on the same intermediate plate 5 via a plurality of first elastic members 11. This makes it possible to reduce the installation area as compared with the case where the first compressor 10 and the second compressor 20 are separately provided. In addition, since the total weight of the structure supported by the second elastic member 12 increases, the vibration-proof effect is improved.

Since the capacity of the first compressor 10 is greater than the capacity of the second compressor 20, the weight of the first compressor 10 is greater than the weight of the second compressor 20. Therefore, the vibration of the second compressor 20, which has a relatively small weight, can be reduced by the weight of the first compressor 10.

Center of gravity arrangement

The arrangement center of gravity is a point that becomes the center of vibration (antinode) of the intermediate plate 5. In other words, the arrangement center of gravity is a point at which the amplitude is maximum when the intermediate plate 5 vibrates.

In the example shown in fig. 4, the four second elastic members 12 are formed of the same material, the same area, and the same thickness. Therefore, the arrangement center of gravity Q1 of the second elastic member 12 is an intersection of a straight line connecting the upper left and lower right elastic members 12 in fig. 4 and a straight line connecting the lower left and upper right elastic members 12 in fig. 4.

In the example shown in fig. 4, three first elastic members 11 are arranged at the apexes of a regular triangle. The three first elastic members 11 are formed of the same material, the same area, and the same thickness. Therefore, the arrangement center of gravity of the first elastic member 11 is the position of the center of gravity of the regular triangle when viewed from above.

The first compressor 10 has a cylindrical shape. The center of gravity C1 of the first compressor 10 is at the position of the approximate center of the circle in fig. 4. In fig. 4, the center of gravity C1 of the first compressor 10 coincides with the arrangement center of gravity of the three first elastic members 11 supporting the first supporting legs 16 as viewed from above.

The second compressor 20 has a cylindrical shape. The center of gravity C2 of the second compressor 20 is at the position of the approximate center of the circle in fig. 4. In fig. 4, the center of gravity C2 of the second compressor 20 coincides with the arrangement center of gravity of the three first elastic members 11 supporting the second supporting legs 26 as viewed from above.

Here, the center of gravity position of the combination of the intermediate plate 5, the first compressor 10, and the second compressor 20 is defined as the center of gravity P1 in a plan view. The center of gravity P1 is located in the vicinity of the arrangement center of gravity Q1 of the second elastic member 12 as viewed from above.

Specifically, since the first compressor 10 has a larger weight than the second compressor 20, the center of gravity P1 is located at a position shifted toward the first compressor 10 side from the arrangement center of gravity Q1. Therefore, the first compressor 10 is a compressor located closest to the center of gravity P1. Here, the distance from the center of gravity P1 to the first compressor 10 in a plan view is defined as r1. The arrangement center of gravity Q1 is located within a region centered on the center of gravity P1 and having a radius of the distance r1. Note that the center of gravity P1 may substantially overlap the arrangement center of gravity Q1 of the second elastic member 12 in a plan view.

Thereby, it is possible to construct a dual vibration preventing structure that ensures a degree of freedom in layout for arranging the first compressor 10 and the second compressor 20 and takes high vibration reducing effect of the position of the center of gravity into consideration.

In order to suppress the transmission of the vibration generated in the first compressor 10 and the second compressor 20 to the casing 2, the operation of the first compressor 10 and the second compressor 20 may be controlled by the controller 100.

For example, the control portion 100 controls the rotation of the first compressor 10 and the second compressor 20 such that they are rotated in the same direction and are out of phase by 180 ° with each other. As a result, the centrifugal forces generated by the first and

second compressors

10 and 20 cancel each other out.

Thereby, vibrations generated by the first compressor 10 and the second compressor 20 cancel each other out, and the vibration-proof effect can be further improved.

Effects of the embodiment

In the characteristic feature 1 of the embodiment, the intermediate plate 5 is supported on the bottom member 3 via the second elastic member 12. The first compressor 10 and the second compressor 20 are supported on the same intermediate plate 5 via a plurality of first elastic members 11.

According to feature 1 of the embodiment, the installation area can be made compact as compared with the case where the first compressor 10 and the second compressor 20 are separately provided. In addition, since the total weight of the structure supported by the second elastic member 12 increases, the vibration-proof effect improves.

In the feature 2 of the embodiment, the weight of the second compressor 20 is smaller than the weight of the first compressor 10.

According to feature 2 of the embodiment, the vibration of the second compressor 20 can be reduced by the weight of the first compressor 10.

In feature 3 of the embodiment, the center of gravity Q1 is arranged in a region having a radius of a distance r1 from the center of gravity P1 to the center of gravity of the closest compressor as viewed in plan.

According to feature 3 of the embodiment, it is possible to construct a double vibration-proof structure that ensures the degree of freedom of layout for arranging a plurality of compressors and takes into account a high vibration-proof effect of the position of the center of gravity.

In feature 4 of the embodiment, the center of gravity P1 substantially coincides with the arrangement center of gravity Q1 in a plan view.

According to feature 4 of the embodiment, it is possible to construct a double vibration-proof structure that ensures the degree of freedom of layout for arranging a plurality of compressors and takes into account a high vibration-proof effect of the position of the center of gravity.

According to the feature 5 of the embodiment, the centrifugal forces generated by the first compressor 10 and the second compressor 20 are cancelled out by controlling the rotations of the first compressor 10 and the second compressor 20.

According to the feature 5 of the embodiment, since the vibrations generated by the plurality of compressors cancel each other out, the vibration-proof effect can be further improved.

Modification of the first embodiment

As shown in fig. 5, a first compressor 10, a second compressor 20, and a plurality of refrigerant circuit constituting members 31 are arranged on the intermediate plate 5. In the example shown in fig. 5, the refrigerant circuit constituting members 31 are a use side heat exchanger 37 and an accumulator 38.

In the example shown in fig. 5, the arrangement center of gravity Q1 of the second elastic member 12 is the intersection of the straight line joining the upper left and lower right second elastic members 12 in fig. 5 and the straight line joining the lower left and upper right second elastic members 12 in fig. 5.

Here, the center of gravity position of the combination of the intermediate plate 5, the first compressor 10, the second compressor 20, the use side heat exchanger 37, and the accumulator 38 is defined as the center of gravity P2 in a plan view. The center of gravity P2 is located in the vicinity of the arrangement center of gravity Q1 of the second elastic member 12 as viewed from above.

Specifically, since the first compressor 10 and the second compressor 20 are disposed at the lower side in fig. 5 than the arrangement center of gravity Q1, the center of gravity P2 is located at a position shifted to the lower side than the arrangement center of gravity Q1. In addition, since the first compressor 10 has a larger weight than the second compressor 20, the center of gravity P2 is located at a position shifted toward the first compressor 10 side from the arrangement center of gravity Q1. Thereby, the center of gravity P2 is located at a position shifted from the arrangement center of gravity Q1 to the lower right in fig. 5.

At this time, the first compressor 10 is located closest to the center of gravity P2. Here, the distance from the center of gravity P2 to the first compressor 10 in a plan view is defined as r2. The arrangement center of gravity Q1 is located within a region centered on the center of gravity P2 and having a radius of the distance r2. Note that the center of gravity P2 may be substantially overlapped with the arrangement center of gravity Q1 of the second elastic member 12 in a plan view.

The refrigerant circuit constituting members 31 other than the first compressor 10, the second compressor 20, the accumulator 38, and the use side heat exchanger 37 may be disposed on the intermediate plate 5, and illustration thereof is omitted. For example, the refrigerant circuit constituting member 31 includes the intermediate heat exchanger 45, the four-way selector valve 33, the check valve bridge 35, the expansion valve 36, the bypass check valve 61, and the like.

(second embodiment)

In the following, the same portions as those in the first embodiment are denoted by the same reference numerals, and only different points will be described.

As shown in fig. 6, the intermediate plate 5 has a first intermediate plate 15 and a second intermediate plate 25. The first compressor 10 is supported on the first intermediate plate 15 via a plurality of first elastic members 11. The second compressor 20 is supported on the second intermediate plate 25 via a plurality of first elastic members 11.

The intermediate plate 5 is formed by integrally connecting the first intermediate plate 15 and the second intermediate plate 25. The first intermediate plate 15 and the second intermediate plate 25 are integrally joined by a joining member 27.

Specifically, the connecting members 27 are arranged in a pair in the up-down direction with the intermediate plate 5 interposed therebetween. The left end of the first intermediate plate 15 abuts against the right end of the second intermediate plate 25. The upper and lower pair of connecting members 27 cover the boundary positions of the first intermediate plate 15 and the second intermediate plate 25, respectively.

The joining member 27, the first intermediate plate 15, and the second intermediate plate 25 are joined integrally by brazing or welding. Thereby, the first intermediate plate 15 and the second intermediate plate 25 are melted and joined, and therefore the joining strength of the intermediate plate 5 can be improved.

The first intermediate plate 15 and the second intermediate plate 25 may be integrally joined by brazing or welding the boundary position between the first intermediate plate 15 and the second intermediate plate 25 without providing the joining member 27.

The coupling member 27, the first intermediate plate 15, and the second intermediate plate 25 may be integrally coupled by rivets or bolts. This makes it possible to easily perform the operation of integrally connecting the first intermediate plate 15 and the second intermediate plate 25.

(third embodiment)

As shown in fig. 7, the intermediate plate 5 has a first intermediate plate 15 and a second intermediate plate 25. The first compressor 10 is supported on the first intermediate plate 15 via a plurality of first elastic members 11. The second compressor 20 is supported on the second intermediate plate 25 via a plurality of first elastic members 11.

The intermediate plate 5 is formed by integrally connecting the first intermediate plate 15 and the second intermediate plate 25. The first intermediate plate 15 and the second intermediate plate 25 are integrally connected in a state in which they partially overlap each other when viewed from above.

Specifically, the second intermediate plate 25 has a coupling portion 28. The coupling portion 28 is formed by bending an end portion of the second intermediate plate 25 on the first intermediate plate 15 side in a stepped shape. Coupling portions 28 of second intermediate plate 25 overlap first intermediate plate 15 in plan view.

The joining portion 28 of the first intermediate plate 15 and the second intermediate plate 25 is joined integrally by brazing or welding, for example. The coupling portions 28 of the first intermediate plate 15 and the second intermediate plate 25 may be integrally coupled by rivets or bolts.

This increases the area of the first intermediate plate 15 overlapping the second intermediate plate 25, and ensures the rigidity of the intermediate plate 5. The coupling portion 28 may be provided on the first intermediate plate 15 side.

(fourth embodiment)

As shown in fig. 8, the intermediate plate 5 has a first intermediate plate 15 and a second intermediate plate 25. The first compressor 10 is supported on the first intermediate plate 15 via a plurality of first elastic members 11. The second compressor 20 is supported on the second intermediate plate 25 via a plurality of first elastic members 11.

The intermediate plate 5 is formed by integrally connecting the first intermediate plate 15 and the second intermediate plate 25. The first intermediate plate 15 and the second intermediate plate 25 are integrally connected via the third elastic member 13.

A third elastic member 13 is disposed between the joint 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 integrally connected via the third elastic member 13. The third elastic member 13 is made of rubber or polyurethane. The third elastic member 13 is bonded to the first intermediate plate 15 and the second intermediate plate 25.

(fifth embodiment)

As shown in fig. 9 and 10, the first compressor 10 and the second compressor 20 are arranged on the same intermediate plate 5. Here, the center of gravity position of the combination of the intermediate plate 5, the first compressor 10, and the second compressor 20 is defined as the center of gravity P1 in a plan view. Between the intermediate plate 5 and the bottom member 3, a fourth elastic member 14 is disposed at a position overlapping the center of gravity P1 in a plan view. The fourth elastic member 14 is made of rubber or polyurethane.

Thus, by arranging the fourth elastic member 14 in accordance with the position of the center of gravity, the bending of the intermediate plate 5 due to the vibration of the first compressor 10 and the second compressor 20 can be reduced.

As shown in fig. 5, similarly, in the case where the first compressor 10, the second compressor 20, the use side heat exchanger 37, and the accumulator 38 are disposed on the intermediate plate 5, the fourth elastic member 14 may be disposed at a position overlapping the center of gravity P2 in a plan view.

(sixth embodiment)

As shown in fig. 11, a first compressor 10, a second compressor 20, and a third compressor 70 are disposed on the intermediate plate 5. The intermediate plate 5 is formed by integrally connecting a first intermediate plate 15, a second intermediate plate 25, and a third intermediate plate 75.

The second intermediate plate 25 is arranged at the lower left corner of the first intermediate plate 15. The third intermediate plate 75 is disposed at the upper left corner of the first intermediate plate 15. The second intermediate plate 25 and the third intermediate plate 75 are integrally connected to each other in a state where a part thereof overlaps the first intermediate plate 15 in a plan view.

Specifically, the second intermediate plate 25 has a coupling portion 28. The coupling portion 28 is formed by bending an end portion of the second intermediate plate 25 on the first intermediate plate 15 side in a stepped shape. The coupling portion 28 of the second intermediate plate 25 overlaps the first intermediate plate 15 in a plan view.

The third intermediate plate 75 has a coupling portion 78. The coupling portion 78 is formed by bending an end portion of the third intermediate plate 75 on the first intermediate plate 15 side in a stepped shape. The coupling portion 78 of the third intermediate plate 75 overlaps the first intermediate plate 15 in a plan view.

The joint portion 28 between the first intermediate plate 15 and the second intermediate plate 25 and the joint portion 78 between the first intermediate plate 15 and the third intermediate plate 75 are integrally joined together by brazing or welding, for example. The connection portion 28 between the first intermediate plate 15 and the second intermediate plate 25 and the connection portion 78 between the first intermediate plate 15 and the third intermediate plate 75 may be integrally connected by rivets or bolts.

The first compressor 10 is supported on the first intermediate plate 15 via a plurality of first elastic members 11. The first compressor 10 has a first support leg 16. Three first spring elements 11 are arranged between the first supporting foot 16 and the first intermediate plate 15. A plurality of refrigerant circuit constituent members 31 are arranged on the first intermediate plate 15. In the example shown in fig. 11, the refrigerant circuit constituting members 31 are a use side heat exchanger 37 and an accumulator 38.

The second compressor 20 is supported on the second intermediate plate 25 via a plurality of first elastic members 11. The second compressor 20 has a second support leg 26. Three first elastic members 11 are arranged between the second supporting leg 26 and the second intermediate plate 25.

The third compressor 70 is supported by the third intermediate plate 75 via the plurality of first elastic members 11. The third compressor 70 has a third support leg 76. Three first elastic members 11 are arranged between the third supporting leg 76 and the third intermediate plate 75.

A plurality of second elastic members 12 are arranged between the first intermediate plate 15 and the bottom member 3. The second elastic members 12 are arranged at the four corners of the first intermediate plate 15.

A plurality of second elastic members 12 are disposed between the second intermediate plate 25 and the bottom member 3. The second elastic member 12 is disposed at the upper and lower left corners of the second middle plate 25.

A plurality of second elastic members 12 are disposed between the third intermediate plate 75 and the bottom member 3. The second elastic member 12 is disposed at the upper and lower left corners of the third middle plate 75.

Thus, the third compressor 70 can be added by the minimum design change of adding the third intermediate plate 75 and integrally connecting it to the first intermediate plate 15.

(seventh embodiment)

As shown in fig. 12, a first compressor 10, a second compressor 20, and a third compressor 70 are disposed on the intermediate plate 5. The intermediate plate 5 has a first intermediate plate 15 and a second intermediate plate 25.

The second intermediate plate 25 has a coupling portion 28. The coupling portion 28 is formed by bending an end portion of the second intermediate plate 25 on the first intermediate plate 15 side in a stepped shape. The coupling portion 28 of the second intermediate plate 25 overlaps the first intermediate plate 15 in a plan view. The intermediate plate 5 is integrally connected by a connecting portion 28 between the first intermediate plate 15 and the second intermediate plate 25.

The first compressor 10 is supported on the first intermediate plate 15 via a plurality of first elastic members 11. A plurality of refrigerant circuit constituent members 31 are arranged on the first intermediate plate 15. In the example shown in fig. 12, the refrigerant circuit constituting members 31 are a use side heat exchanger 37 and an accumulator 38.

The second compressor 20 is supported on the second intermediate plate 25 via a plurality of first elastic members 11. The third compressor 70 is supported by the second intermediate plate 25 via the plurality of first elastic members 11.

Thus, the third compressor 70 can be added by the minimum design change of supporting the second compressor 20 and the third compressor 70 on the second intermediate plate 25.

(eighth embodiment)

As shown in fig. 13, a first compressor 10, a second compressor 20, and a third compressor 70 are disposed on the intermediate plate 5. The intermediate plate 5 has a first intermediate plate 15, a second intermediate plate 25 and a third intermediate plate 75.

The second intermediate plate 25 has a joint 28. The coupling portion 28 is formed by bending an end portion of the second intermediate plate 25 on the first intermediate plate 15 side in a stepped shape. Coupling portions 28 of second intermediate plate 25 overlap first intermediate plate 15 in a plan view.

The third intermediate plate 75 has a coupling portion 78. The coupling portion 78 is formed by bending an end portion of the third intermediate plate 75 on the second intermediate plate 25 side in a stepped manner. 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 integrally coupled to the first intermediate plate 15. The coupling portion 78 of the third intermediate plate 75 is integrally coupled to the second intermediate plate 25. Thus, the intermediate plate 5 is formed by integrally connecting the first intermediate plate 15, the second intermediate plate 25, and the third intermediate plate 75.

The first compressor 10 is supported on the first intermediate plate 15 via a plurality of first elastic members 11. A plurality of refrigerant circuit constituent members 31 are arranged on the first intermediate plate 15. In the example shown in fig. 13, the refrigerant circuit constituting members 31 are a use side heat exchanger 37 and an accumulator 38.

(other embodiments)

The above embodiment may have the following configuration.

In the present embodiment, a configuration including two or three compressors has been described, but a configuration including four or more compressors may be employed.

While the embodiments and the modifications have been described above, it is to be understood that various changes in form and details may be made therein without departing from the spirit and scope of the appended claims. The above embodiments and modifications may be appropriately combined and replaced as long as the functions of the objects of the present disclosure are not affected. In addition, the words "first", "second" and "third" … … in the specification and claims are used only for distinguishing between words that include the above words and are not intended to limit the number or order of the words.

Industrial applicability-

As described above, the present disclosure is useful for a refrigeration cycle device.

-description of symbols-

1. Refrigeration cycle device

2. Shell body

3. Bottom piece

5. Intermediate plate

10. First compressor

11. First elastic component

12. Second elastic component

13. Third elastic member

14. Fourth elastic member

15. First intermediate plate

20. Second compressor

25. Second intermediate plate

31. Refrigerant circuit component

70. Third compressor

75. Third intermediate plate

100. Control unit

Center of gravity of P1

P2 center of gravity

Q1 arrangement center of gravity

Claims

1. A refrigeration cycle device comprising a casing (2) having a bottom member (3) and a plurality of compressors housed in the casing (2), characterized in that:

the plurality of compressors includes at least a first compressor (10) and a second compressor (20),

the first compressor (10) and the second compressor (20) are supported on the same intermediate plate (5) via a plurality of first elastic members (11),

the intermediate plate (5) is supported on the base part (3) via a second elastic member (12).

2. The refrigeration cycle apparatus according to claim 1, wherein:

the intermediate plate (5) is configured by integrally connecting a first intermediate plate (15) and a second intermediate plate (25), the first compressor (10) is supported by the first intermediate plate (15), and the second compressor (20) is supported by the second intermediate plate (25).

3. The refrigeration cycle apparatus according to claim 2, wherein:

the plurality of compressors further includes a third compressor (70),

the third compressor (70) is supported on a third intermediate plate (75) via a first elastic member (11),

the intermediate plate (5) is formed by integrally connecting the first intermediate plate (15), the second intermediate plate (25), and the third intermediate plate (75).

4. The refrigeration cycle apparatus according to claim 2, wherein:

the plurality of compressors further includes a third compressor (70),

the third compressor (70) is supported on the second intermediate plate (25) via a first elastic member (11).

5. The refrigeration cycle apparatus according to any one of claims 2 to 4, wherein:

the first intermediate plate (15) and the second intermediate plate (25) are integrally connected in a state in which a part of the plates overlaps when viewed from above.

6. The refrigeration cycle apparatus according to any one of claims 2 to 5, wherein:

the first intermediate plate (15) and the second intermediate plate (25) are joined integrally by brazing or welding.

7. The refrigeration cycle apparatus according to any one of claims 2 to 5, wherein:

the first intermediate plate (15) and the second intermediate plate (25) are integrally connected by rivets or bolts.

8. The refrigeration cycle apparatus according to any one of claims 2 to 5, wherein:

the first intermediate plate (15) and the second intermediate plate (25) are integrally connected via a third elastic member (13).

9. The refrigeration cycle apparatus according to any one of claims 1 to 8, wherein:

the second compressor (20) has a smaller weight than the first compressor (10).

10. A refrigeration cycle apparatus according to any one of claims 1 to 9, wherein:

the center of gravity of the combination of the intermediate plate (5) and the plurality of compressors when viewed from above is represented by P1, the arrangement center of gravity of the second elastic member (12) when viewed from above is represented by Q1, the distance from the center of gravity P1 to the center of gravity of the compressor located closest to the center of gravity P1 when viewed from above is represented by r1,

the arrangement center of gravity Q1 is located within a region centered on the center of gravity P1 and having a radius of the distance r1.

11. The refrigeration cycle apparatus according to claim 10, wherein:

the center of gravity P1 substantially coincides with the arrangement center of gravity Q1 as viewed from above.

12. A refrigeration cycle apparatus according to any one of claims 1 to 9, wherein:

the center of gravity of the combination of the intermediate plate (5), the plurality of compressors, and the refrigerant circuit constituting member (31) disposed on the intermediate plate (5) is P2 when viewed from above, the center of gravity of the second elastic member (12) when viewed from above is Q1, and the distance from the center of gravity P2 to the center of gravity of the compressor located closest to the center of gravity P2 when viewed from above is r2,

the arrangement center of gravity Q1 is located within a region having the center of gravity P2 as a center and the distance r2 as a radius.

13. The refrigeration cycle apparatus according to claim 12, wherein:

the center of gravity P2 substantially coincides with the arrangement center of gravity Q1 as viewed from above.

14. The refrigeration cycle apparatus according to claim 10 or 11, characterized in that:

between the intermediate plate (5) and the bottom part (3), a fourth elastic member (14) is arranged at a position coinciding with the center of gravity P1 in a top view.

15. The refrigeration cycle apparatus according to claim 12 or 13, characterized in that:

between the intermediate plate (5) and the bottom part (3), a fourth elastic member (14) is arranged at a position coinciding with the center of gravity P2 in a top view.

16. A refrigeration cycle apparatus according to any one of claims 1 to 15, wherein:

the refrigeration cycle device comprises a control unit (100) for controlling the operation of the plurality of compressors,

the control unit (100) controls the rotation of the plurality of compressors so that centrifugal forces generated by the plurality of compressors cancel each other out.