Refrigeration cycle device

Abstract

To provide a refrigeration cycle device capable of preventing a refrigerant from leaking through a service port.SOLUTION: A refrigeration cycle device 1 comprises: a refrigerant circuit 5 in which a refrigerant circulation flow path through which a refrigerant circulates is formed; a service port 31 connected to the refrigerant circulation flow path via a service port flow path; a manual on-off valve 33 provided in the middle of the service port flow path; and a solenoid valve 34 provided in the middle of the service port flow path and in series with the manual on-off valve 33.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The technology of the present disclosure relates to a refrigeration cycle device. [Background technology]

[0002] A refrigeration cycle device is known in which a manual on-off valve is provided in the middle of a flow path connecting a refrigerant circuit, through which a refrigerant circulates, and a service port (Patent Document 1). In such a refrigeration cycle device, the manual on-off valve is opened during production or repair, so that the refrigerant can be filled into the refrigerant circuit or the refrigerant can be recovered from the refrigerant circuit via the service port. In such a refrigeration cycle device, the manual on-off valve is closed, so that the refrigerant can be prevented from leaking from the refrigerant circuit via the service port. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-075764 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, such a refrigeration cycle device has a problem that the refrigerant may leak from the refrigerant circuit through the service port when a malfunction occurs in the manual on-off valve. Also, in such a refrigeration cycle device, when the refrigerant circulating in the refrigerant circuit is flammable, the refrigerant leaking through the service port may ignite.

[0005] The disclosed technique has been made in consideration of the above-mentioned points, and has an object to provide a refrigeration cycle device that prevents refrigerant from leaking through a service port. [Means for solving the problem]

[0006] A refrigeration cycle device according to one embodiment of the present disclosure includes a refrigerant circuit in which a first flow path is formed through which a refrigerant circulates, a service port connected to the first flow path via a second flow path, a first valve provided midway through the second flow path, and a second valve provided midway through the second flow path in series with the first valve. Effect of the Invention

[0007] The disclosed refrigeration cycle apparatus can prevent refrigerant from leaking through the service port. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a refrigerant circuit diagram showing a refrigeration cycle device of an embodiment. [Diagram 2] FIG. 2 is a perspective view showing the outdoor unit. [Diagram 3] FIG. 3 is an exploded perspective view showing the outdoor unit. [Figure 4] FIG. 4 is a perspective view showing the service port portion. [Diagram 5] FIG. 5 is a front view showing the outdoor unit. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, a refrigeration cycle device according to an embodiment disclosed in the present application will be described in detail with reference to the drawings. Note that the following description does not limit the technology of the present disclosure. In addition, in the following description, the same components are given the same reference numerals, and duplicated descriptions are omitted. EXAMPLES

[0010] FIG. 1 is a refrigerant circuit diagram showing a refrigeration cycle apparatus 1 of an embodiment. The refrigeration cycle apparatus 1 is an air conditioner equipped with an outdoor unit 2 and an indoor unit 3. The outdoor unit 2 is installed outdoors. The indoor unit 3 is installed indoors. The refrigeration cycle apparatus 1 further includes a refrigerant circuit 5. The refrigerant circuit 5 is disposed inside the outdoor unit 2. The refrigerant circuit 5 includes a compressor 11, a four-way valve 12, a water-refrigerant heat exchanger 14, an expansion valve 15, and an outdoor heat exchanger 16.

[0011] Compressor 11 includes a suction pipe 17 and a discharge pipe 18. Compressor 11 compresses a refrigerant supplied to suction pipe 17 and discharges the compressed refrigerant to discharge pipe 18. The refrigerant has flammability, such as high flammability. Examples of refrigerants that have high flammability include hydrocarbons, such as R290 refrigerant (propane), R1270 refrigerant (propylene), R50 refrigerant (methane), R170 refrigerant (ethane), R600a refrigerant (isobutane), and R1150 refrigerant (ethylene).

[0012] The refrigerant circuit 5 further includes a first refrigerant pipe 21, a second refrigerant pipe 22, a third refrigerant pipe 23, a fourth refrigerant pipe 24, a fifth refrigerant pipe 25, and a sixth refrigerant pipe 26. The four-way valve 12 is connected to the suction pipe 17 via the first refrigerant pipe 21, to the discharge pipe 18 via the second refrigerant pipe 22, to the water-refrigerant heat exchanger 14 via the third refrigerant pipe 23, and to the outdoor heat exchanger 16 via the fourth refrigerant pipe 24. The four-way valve 12 switches the refrigerant circuit 5 between a heating cycle or a cooling cycle.

[0013] When the refrigerant circuit 5 is switched to the heating cycle, the discharge pipe 18 is connected to the water-refrigerant heat exchanger 14 via the four-way valve 12, and the outdoor heat exchanger 16 is connected to the suction pipe 17 via the four-way valve 12. When the refrigerant circuit 5 is switched to the heating cycle, the four-way valve 12 blocks the flow path of the refrigerant so that the discharge pipe 18 is not connected to the outdoor heat exchanger 16 or the suction pipe 17 via the four-way valve 12, and the water-refrigerant heat exchanger 14 is not connected to the outdoor heat exchanger 16 or the suction pipe 17 via the four-way valve 12.

[0014] When the refrigerant circuit 5 is switched to the cooling cycle, the discharge pipe 18 is connected to the outdoor heat exchanger 16 via the four-way valve 12, and the water-refrigerant heat exchanger 14 is connected to the suction pipe 17 via the four-way valve 12. When the refrigerant circuit 5 is switched to the cooling cycle, the four-way valve 12 blocks the flow path of the refrigerant so that the discharge pipe 18 is not connected to the water-refrigerant heat exchanger 14 or the suction pipe 17 via the four-way valve 12, and so that the outdoor heat exchanger 16 does not flow to the water-refrigerant heat exchanger 14 or the suction pipe 17 via the four-way valve 12.

[0015] The water-refrigerant heat exchanger 14 is connected to the expansion valve 15 via a fifth refrigerant pipe 25. The expansion valve 15 is connected to the outdoor heat exchanger 16 via a sixth refrigerant pipe 26. The expansion valve 15 reduces the pressure of the refrigerant that has flowed into the expansion valve 15. That is, the refrigerant circuit 5 is formed with a refrigerant circulation flow path (first flow path) in which the refrigerant circulates between the compressor 11, the water-refrigerant heat exchanger 14, the expansion valve 15, and the outdoor heat exchanger 16.

[0016] The refrigeration cycle device 1 further includes a service port section 30 for charging the refrigerant circuit 5 with a refrigerant or recovering a refrigerant from the refrigerant circuit 5, as described below. The service port section 30 includes a service port 31, a seventh refrigerant pipe 32, a manual on-off valve 33 (first valve), and a solenoid valve 34 (second valve). The seventh refrigerant pipe 32 forms a service port flow path (second flow path) through which the refrigerant flows. The service port 31 is connected to a connection section 35 provided in the middle of the first refrigerant pipe 21 via the seventh refrigerant pipe 32. The manual on-off valve 33 is provided in the middle of the seventh refrigerant pipe 32. The manual on-off valve 33 is operated by an operator to open so that the service port flow path of the seventh refrigerant pipe 32 is not blocked, or to close so that the service port flow path of the seventh refrigerant pipe 32 is blocked.

[0017] The solenoid valve 34 is provided in a portion of the seventh refrigerant pipe 32 between the manual on-off valve 33 and the connection portion 35. The solenoid valve 34 opens so as not to block the service port flow path of the seventh refrigerant pipe 32, and closes so as to block the service port flow path of the seventh refrigerant pipe 32. The solenoid valve 34 is a normally open solenoid valve that opens when no power is supplied to the solenoid valve 34 and closes when power is supplied to the solenoid valve 34. Here, the manual on-off valve 33 and the solenoid valve 34 are disposed in the service port flow path so that opening and closing of the valves does not affect the circulation of the refrigerant in the refrigerant circulation flow path.

[0018] The refrigeration cycle device 1 further includes a water circulation circuit 41. The water circulation circuit 41 includes a pump 42 and an indoor heat exchanger 43. The pump 42 is disposed inside the outdoor unit 2. The pump 42 is connected to the indoor heat exchanger 43 and is connected to the water-refrigerant heat exchanger 14 of the refrigerant circuit 5. The pump 42 supplies the water flowing out from the indoor heat exchanger 43 to the water-refrigerant heat exchanger 14. The water-refrigerant heat exchanger 14 exchanges heat between the water supplied from the pump 42 and the refrigerant flowing into the water-refrigerant heat exchanger 14. The indoor heat exchanger 43 is disposed inside the indoor unit 3. The indoor heat exchanger 43 is connected to the water-refrigerant heat exchanger 14. That is, the water circulation circuit 41 includes a water circulation flow path through which water circulates between the pump 42, the indoor heat exchanger 43, and the water-refrigerant heat exchanger 14.

[0019] The refrigeration cycle device 1 further includes an outdoor fan 44 and an indoor fan 45. The outdoor fan 44 is disposed inside the outdoor unit 2. The outdoor fan 44 blows outside air so that the air passes through the outdoor heat exchanger 16. The outdoor heat exchanger 16 exchanges heat between the refrigerant that has flowed into the outdoor heat exchanger 16 and the air passing through the outdoor heat exchanger 16. The indoor fan 45 is disposed inside the indoor unit 3. The indoor fan 45 blows air from the room in which the indoor unit 3 is installed so that the air passes through the indoor heat exchanger 43. The indoor heat exchanger 43 exchanges heat between the refrigerant that has flowed into the indoor heat exchanger 43 and the air passing through the indoor heat exchanger 43. The indoor unit 3 blows out the air that has passed through the indoor heat exchanger 43 into the room in which the indoor unit 3 is installed.

[0020] 2 is a perspective view showing the outdoor unit 2. The outdoor unit 2 includes a housing 51. The housing 51 is formed in a generally rectangular parallelepiped shape. The housing 51 includes a detachable cover 53.

[0021] FIG. 3 is an exploded perspective view showing the outdoor unit 2. The housing 51 includes a cover 53, which will be described later, as well as a bottom plate 55, a top plate 56, a front grill 57, and a side grill 58. The bottom plate 55 is formed in a generally plate-like shape and is placed on an installation surface on which the outdoor unit 2 is installed. The top plate 56 is formed in a generally plate-like shape. The top plate 56 is disposed along another plane that is parallel to the plane along which the bottom plate 55 is disposed. The front grill 57 is formed in a generally plate-like shape and has an opening through which air passes. The front grill 57 is disposed between the bottom plate 55 and the top plate 56 along another plane that is perpendicular to the plane along which the bottom plate 55 is disposed, and is fixed to the bottom plate 55. The side grill 58 is formed in a generally plate-like shape and has an opening through which air passes. The side grill 58 is disposed between the bottom plate 55 and the top plate 56 along another plane that is perpendicular to the plane along which the bottom plate 55 extends and perpendicular to the plane along which the front grill 57 extends, and is fixed to the bottom plate 55.

[0022] The cover 53 includes a front cover 61, a side cover 62, and a rear cover 63. The front cover 61 is formed in a generally plate shape. The side cover 62 is formed in a generally plate shape. The rear cover 63 is formed in a generally plate shape. The front cover 61 is disposed between the bottom plate 55 and the top plate 56 along the plane along which the front grill 57 lies, and is fixed to the bottom plate 55.

[0023] The side cover 62 is disposed between the bottom plate 55 and the top plate 56 along another plane parallel to the plane along which the side grille 58 is disposed, and is fixed to the bottom plate 55. The rear cover 63 is disposed between the bottom plate 55 and the top plate 56 along another plane parallel to the plane along which the front cover 61 is disposed, and is fixed to the bottom plate 55.

[0024] The outdoor unit 2 further includes a partition plate 64. The partition plate 64 is formed in a plate shape. The partition plate 64 is disposed between the side grill 58 and the side cover 62 along another plane parallel to the plane along which the side grill 58 is disposed, and is fixed to the bottom plate 55. The partition plate 64 divides the space formed inside the housing 51 into a heat exchanger storage space 59 and a refrigerant circuit component storage space 68 (internal space). The heat exchanger storage space 59 is surrounded by the bottom plate 55, the top plate 56, the front grill 57, the side grill 58, and the partition plate 64. The refrigerant circuit component storage space 68 is surrounded by the bottom plate 55, the top plate 56, the cover 53, and the partition plate 64. The refrigerant circuit component storage space 68 is connected to the outside of the housing 51 through the opening 74 when the cover 53 is removed from the bottom plate 55. That is, the openings 74 are formed on the front cover 61 side, the side cover 62 side, and the rear cover 63 side of the refrigerant circuit component storage space 68 .

[0025] The outdoor fan 44 and the outdoor heat exchanger 16 are disposed in a heat exchanger housing space 59. The outdoor fan 44 blows outside air so that the air that has passed through the rear surface of the housing 51 and the opening of the side grill 58 passes through the outdoor heat exchanger 16, and so that the air that has passed through the outdoor heat exchanger 16 is released to the outside of the housing 51 via the opening of the front grill 57.

[0026] The refrigeration cycle apparatus 1 further includes a control device 65. The control device 65 has a plurality of electric components and includes a power supply circuit 66. The power supply circuit 66 does not supply electric power to the solenoid valve 34 when electric power is not supplied to the refrigeration cycle apparatus 1, and supplies electric power to the solenoid valve 34 when electric power is supplied to the refrigeration cycle apparatus 1. The control device 65 uses electric power supplied to the refrigeration cycle apparatus 1 to control the compressor 11, the four-way valve 12, the expansion valve 15, the pump 42, and the outdoor fan 44. The control device 65 is disposed in an electric component storage space 69 on the top plate 56 side of the refrigerant circuit component storage space 68.

[0027] Refrigerant circuit parts 71 other than the outdoor heat exchanger 16 and the service port portion 30 of the refrigerant circuit 5 are disposed in a refrigerant piping storage space 72 on the bottom plate 55 side of the refrigerant circuit component storage space 68. The service port portion 30 is disposed in a service port storage space 73 that is disposed between the electric component storage space 69 and the refrigerant piping storage space 72 of the refrigerant circuit component storage space 68. The service port storage space 73 is connected to the outside of the housing 51 via an opening 74 when the cover 53 is detached from the bottom plate 55.

[0028] 4 is a perspective view showing the service port portion 30. The manual on-off valve 33 is equipped with an on-off operation part 81. The manual on-off valve 33 is opened and closed when the on-off operation part 81 is operated by an operator. For example, the manual on-off valve 33 is closed when the on-off operation part 81 is tightened by the operator, and is opened when the on-off operation part 81 is loosened by the operator.

[0029] The service port 31 is formed so that when the refrigerant flows toward the service port 31 along the service port flow path of the seventh refrigerant pipe 32, the refrigerant that has flowed through the service port flow path is discharged in a discharge direction 82. That is, the refrigerant discharged from the service port 31 in the discharge direction 82 forms a discharge area 83 on the side of the service port 31 in the discharge direction 82. The discharge area 83 is formed in a conical shape, and is formed so that the service port 31 coincides with the apex of the cone. The shape of the discharge area 83 is determined by the shape of the service port 31; for example, the smaller the pipe diameter of the service port 31, the smaller the apex angle and the more elongated the conical shape the discharge area 83 is formed.

[0030] 5 is a front view showing the outdoor unit 2. The service port section 30 is disposed in the service port storage space 73 such that a portion of the side cover 62 is located within the discharge area 83. In other words, the service port section 30 is disposed in the service port storage space 73 such that when the cover 53 is removed from the bottom plate 55, the area of ​​the opening 74 that is blocked by the side cover 62 and the discharge area 83 overlap.

[0031] The operations performed by the refrigeration cycle device 1 include a heating operation and a cooling operation. [Heating operation] The heating operation is performed, for example, when the refrigeration cycle apparatus 1 is operated by a user to perform the heating operation. When the refrigeration cycle apparatus 1 performs the heating operation, the control device 65 controls the four-way valve 12 using power supplied to the refrigeration cycle apparatus 1 to switch the refrigerant circuit 5 to the heating cycle. The control device 65 further controls the compressor 11 to compress the low-pressure gas-phase refrigerant flowing into the compressor 11 through the suction pipe 17. The low-pressure gas-phase refrigerant is compressed by the compressor 11 to become a high-pressure gas-phase refrigerant. The compressor 11 discharges the high-pressure gas-phase refrigerant from the discharge pipe 18. The high-pressure gas-phase refrigerant discharged from the discharge pipe 18 flows into the water-refrigerant heat exchanger 14 through the four-way valve 12 because the refrigerant circuit 5 is switched to the heating cycle.

[0032] The water-refrigerant heat exchanger 14 exchanges heat between the high-pressure gas-phase refrigerant flowing into the water-refrigerant heat exchanger 14 and the water circulating through the water circulation circuit 41. The high-pressure gas-phase refrigerant is cooled and condensed in the water-refrigerant heat exchanger 14 to become a high-pressure liquid-phase refrigerant in a supercooled state. That is, the water-refrigerant heat exchanger 14 functions as a condenser when the refrigeration cycle apparatus 1 performs a heating operation. The high-pressure liquid-phase refrigerant flows out of the water-refrigerant heat exchanger 14 and flows into the expansion valve 15.

[0033] The expansion valve 15 reduces the pressure of the high-pressure liquid-phase refrigerant that flows into the expansion valve 15 from the water-refrigerant heat exchanger 14. The high-pressure liquid-phase refrigerant is reduced in pressure by the expansion valve 15 and becomes a low-pressure gas-liquid two-phase refrigerant. The low-pressure gas-liquid two-phase refrigerant flows out of the expansion valve 15 and flows into the outdoor heat exchanger 16.

[0034] The control device 65 further controls the outdoor fan 44 to pass outdoor air through the outdoor heat exchanger 16. The outdoor heat exchanger 16 exchanges heat between the low-pressure gas-liquid two-phase refrigerant that has flowed into the outdoor heat exchanger 16 and the outdoor air that passes through the outdoor heat exchanger 16. The low-pressure gas-liquid two-phase refrigerant is heated and evaporated in the outdoor heat exchanger 16 to become a low-pressure gas-phase refrigerant. That is, the outdoor heat exchanger 16 functions as an evaporator when the refrigeration cycle device 1 performs a heating operation. The low-pressure gas-phase refrigerant flows out of the outdoor heat exchanger 16, and flows into the suction pipe 17 through the four-way valve 12 because the refrigerant circuit 5 is switched to the heating cycle, and flows into the compressor 11 through the suction pipe 17. That is, the refrigerant circulates between the compressor 11, the water-refrigerant heat exchanger 14, the expansion valve 15, and the outdoor heat exchanger 16 through a refrigerant circulation flow path formed in the refrigerant circuit 5.

[0035] The control device 65 further controls the pump 42 to supply the water flowing into the pump 42 to the water-refrigerant heat exchanger 14. The water-refrigerant heat exchanger 14 exchanges heat between the high-pressure gas-phase refrigerant that has flowed into the water-refrigerant heat exchanger 14 in the refrigerant circuit 5 and the water that has flowed into the water-refrigerant heat exchanger 14 in the water circulation circuit 41, and heats the water that has flowed into the water-refrigerant heat exchanger 14 in the water circulation circuit 41. The water heated in the water-refrigerant heat exchanger 14 flows out of the water circulation circuit 41 and flows into the indoor heat exchanger 43.

[0036] The control device 65 controls the indoor fan 45, so that the air in the room in which the indoor unit 3 is installed passes through the outdoor heat exchanger 16. The indoor heat exchanger 43 exchanges heat between the water that has flowed into the indoor heat exchanger 43 and the air that passes through the indoor heat exchanger 43, cools the water that has flowed into the indoor heat exchanger 43, and heats the air that passes through the indoor heat exchanger 43. The water cooled by the indoor heat exchanger 43 flows out of the indoor heat exchanger 43 and flows into the pump 42. That is, the water circulates through the pump 42, the water-refrigerant heat exchanger 14, and the indoor heat exchanger 43 by the water circulation circuit 41. The indoor unit 3 blows the air that has passed through the indoor heat exchanger 43 and been heated into the room in which the indoor unit 3 is installed, heating the room.

[0037] [Cooling operation] The cooling operation is performed, for example, when the refrigeration cycle apparatus 1 is operated by a user to perform the cooling operation. When the refrigeration cycle apparatus 1 performs the cooling operation, the control device 65 controls the four-way valve 12 using power supplied to the refrigeration cycle apparatus 1 to switch the refrigerant circuit 5 to the cooling cycle. The control device 65 further controls the compressor 11 to compress the low-pressure gas-phase refrigerant flowing into the compressor 11 through the suction pipe 17. The low-pressure gas-phase refrigerant is compressed by the compressor 11 to become a high-pressure gas-phase refrigerant. The compressor 11 discharges the high-pressure gas-phase refrigerant to the discharge pipe 18. The high-pressure gas-phase refrigerant discharged to the discharge pipe 18 flows into the outdoor heat exchanger 16 through the four-way valve 12 because the refrigerant circuit 5 is switched to the cooling cycle.

[0038] The control device 65 further controls the outdoor fan 44 to cause the outdoor air to pass through the outdoor heat exchanger 16. The outdoor heat exchanger 16 exchanges heat between the high-pressure gas-phase refrigerant that has flowed into the outdoor heat exchanger 16 and the outdoor air passing through the outdoor heat exchanger 16. The high-pressure gas-phase refrigerant releases heat to the outdoor air in the outdoor heat exchanger 16 and condenses, becoming a high-pressure liquid-phase refrigerant in a supercooled state. That is, the outdoor heat exchanger 16 functions as a condenser when the refrigeration cycle apparatus 1 performs a cooling operation. The high-pressure liquid-phase refrigerant flows out of the outdoor heat exchanger 16 and flows into the expansion valve 15.

[0039] The expansion valve 15 reduces the pressure of the high-pressure liquid-phase refrigerant that flows into the expansion valve 15 from the outdoor heat exchanger 16. The high-pressure liquid-phase refrigerant is reduced in pressure by the expansion valve 15 and becomes a low-pressure gas-liquid two-phase refrigerant. The low-pressure gas-liquid two-phase refrigerant flows out of the expansion valve 15 and flows into the water-refrigerant heat exchanger 14.

[0040] The water-refrigerant heat exchanger 14 exchanges heat between the low-pressure gas-liquid two-phase refrigerant flowing into the water-refrigerant heat exchanger 14 and the water circulating through the water circulation circuit 41. The low-pressure gas-liquid two-phase refrigerant is heated and evaporated in the water-refrigerant heat exchanger 14 to become a low-pressure gas-phase refrigerant. That is, the water-refrigerant heat exchanger 14 functions as an evaporator when the refrigeration cycle device 1 performs a cooling operation. The low-pressure gas-phase refrigerant flows out of the water-refrigerant heat exchanger 14, and flows into the suction pipe 17 through the four-way valve 12 because the refrigerant circuit 5 is switched to the cooling cycle, and flows into the compressor 11 through the suction pipe 17. That is, the refrigerant circulates between the compressor 11, the water-refrigerant heat exchanger 14, the expansion valve 15, and the outdoor heat exchanger 16 through a refrigerant circulation flow path formed in the refrigerant circuit 5.

[0041] The control device 65 further controls the pump 42 to supply the water flowing into the pump 42 to the water-refrigerant heat exchanger 14. The water-refrigerant heat exchanger 14 exchanges heat between the low-pressure gas-liquid two-phase refrigerant that has flowed into the water-refrigerant heat exchanger 14 in the refrigerant circuit 5 and the water that has flowed into the water-refrigerant heat exchanger 14 in the water circulation circuit 41, and cools the water that has flowed into the water-refrigerant heat exchanger 14 in the water circulation circuit 41. The water cooled in the water-refrigerant heat exchanger 14 flows out of the water circulation circuit 41 and flows into the indoor heat exchanger 43.

[0042] The control device 65 controls the indoor fan 45 to pass the air in the room in which the indoor unit 3 is installed through the outdoor heat exchanger 16. The indoor heat exchanger 43 exchanges heat between the water flowing into the indoor heat exchanger 43 and the air passing through the indoor heat exchanger 43, heats the water flowing into the indoor heat exchanger 43, and cools the air passing through the indoor heat exchanger 43. The water heated by the indoor heat exchanger 43 flows out from the indoor heat exchanger 43 and flows into the pump 42. That is, the water circulates through the pump 42, the water-refrigerant heat exchanger 14, and the indoor heat exchanger 43 by the water circulation circuit 41. The indoor unit 3 blows the air that has passed through the indoor heat exchanger 43 and been cooled into the room in which the indoor unit 3 is installed, thereby cooling the room.

[0043] When the refrigeration cycle apparatus 1 performs a heating operation or a cooling operation, the power supply circuit 66 supplies power to the solenoid valve 34 using the power supplied to the refrigeration cycle apparatus 1. When the refrigeration cycle apparatus 1 performs a heating operation or a cooling operation, the solenoid valve 34 is closed by the power supply circuit 66 to the solenoid valve 34, so that the refrigerant does not flow into the service port flow path of the seventh refrigerant pipe 32. For example, the manual on-off valve 33 may be in an open state due to a malfunction such as an operator forgetting to close the opening / closing operation unit 81 of the manual on-off valve 33 or a mechanical malfunction of the manual on-off valve 33, and the refrigerant may flow into the service port flow path of the seventh refrigerant pipe 32. The refrigeration cycle apparatus 1 can prevent the refrigerant circulating in the refrigerant circulation flow path from leaking through the service port 31 by closing the solenoid valve 34 during the heating operation or the cooling operation, even when the manual on-off valve 33 is open due to a malfunction.

[0044] The refrigerant leaking through the service port 31 accumulates in the electric component storage space 69 because the service port storage space 73 is connected to the electric component storage space 69, and a flammable region where the refrigerant concentration falls within a predetermined concentration range may be formed in the electric component storage space 69. When the refrigeration cycle apparatus 1 is in heating or cooling operation, sparks may occur due to discharge or the like in the multiple electric components of the control device 65 due to the power supplied to the refrigeration cycle apparatus 1. The sparks generated in the multiple electric components of the control device 65 may ignite the refrigerant in the flammable region formed in the electric component storage space 69, and at this time, the refrigeration cycle apparatus 1 may ignite in the electric component storage space 69. When power is supplied to the refrigeration cycle device 1, the solenoid valve 34 is closed to prevent the refrigerant from leaking through the service port 31, thereby preventing the service port portion 30 from causing a flammable area to form in the electrical component storage space 69, preventing sparks generated by multiple electrical components of the control device 65 from igniting the refrigerant in the flammable area, and preventing fire in the electrical component storage space 69.

[0045] In the refrigeration cycle apparatus 1, since the connection part 35 is provided in the middle of the first refrigerant pipe 21, the pressure of the refrigerant flowing in the service port passage of the seventh refrigerant pipe 32 during heating operation or cooling operation can be reduced compared to other refrigeration cycle apparatuses in which the connection part 35 is provided in the middle of the second refrigerant pipe 22. In the refrigeration cycle apparatus 1, since the pressure of the refrigerant flowing in the service port passage of the seventh refrigerant pipe 32 is reduced, the release speed of the refrigerant when the refrigerant leaks through the service port 31 is reduced, and therefore the accumulation of the refrigerant in the electric component storage space 69 can be suppressed. Furthermore, in the refrigeration cycle apparatus 1, since the electric component storage space 69 is not disposed in the discharge region 83 on the side of the discharge direction 82 of the service port 31, the accumulation of the refrigerant in the electric component storage space 69 can be suppressed even when the refrigerant leaks through the service port 31. The refrigeration cycle apparatus 1 can suppress the formation of a flammable region in the electric component storage space 69 by suppressing the accumulation of the refrigerant in the electric component storage space 69, and can reduce the flammable region even when the flammable region is formed in the electric component storage space 69. The refrigeration cycle apparatus 1 can suppress the ignition of the refrigerant by sparks generated by the multiple electric components of the control device 65 by suppressing the formation of a flammable region in the electric component storage space 69, and can suppress fire in the electric component storage space 69.

[0046] In the refrigeration cycle apparatus 1, for example, the refrigerant circuit 5 is filled with refrigerant when the apparatus is installed, and the refrigerant is recovered from the refrigerant circuit 5 when the apparatus is removed. When the refrigerant circuit 5 is filled with refrigerant or when the refrigerant is recovered from the refrigerant circuit 5, an operator cuts off power to the refrigeration cycle apparatus 1. When power is no longer supplied to the refrigeration cycle apparatus 1, the power supply circuit 66 stops supplying power to the solenoid valve 34. When power is no longer supplied to the solenoid valve 34, the solenoid valve 34 opens so that the service port flow path of the seventh refrigerant pipe 32 is not blocked.

[0047] In the refrigeration cycle apparatus 1, when the solenoid valve 34 is opened and the manual on-off valve 33 is open due to a malfunction, the refrigerant circulating through the refrigerant circulation passage may leak through the service port 31. However, at this time, the refrigeration cycle apparatus 1 prevents the plurality of electrical components of the control device 65 from generating sparks because no power is supplied to the refrigeration cycle apparatus 1. By preventing the plurality of electrical components of the control device 65 from generating sparks, the refrigeration cycle apparatus 1 can prevent the refrigerant from igniting and can prevent fire in the electrical component storage space 69.

[0048] After power is no longer supplied to the refrigeration cycle apparatus 1, the worker removes the cover 53 from the bottom plate 55 and connects a refrigerant charging / recovery device that charges the refrigerant circuit 5 with refrigerant or recovers refrigerant from the refrigerant circuit 5 to the service port 31. After the refrigerant charging / recovery device is connected to the service port 31, the worker loosens the opening / closing operation part 81 of the manual on-off valve 33 and opens the manual on-off valve 33 so that the service port flow path of the seventh refrigerant pipe 32 is not blocked. The refrigerant charging / recovery device is connected to the refrigerant circuit 5 via the service port flow path because the manual on-off valve 33 and the solenoid valve 34 are open. After the refrigerant charging / recovery device is connected to the refrigerant circuit 5, the worker operates the refrigerant charging / recovery device to charge the refrigerant circuit 5 with refrigerant or recover refrigerant from the refrigerant circuit 5.

[0049] After the refrigerant circuit 5 is filled with refrigerant or after the refrigerant is recovered from the refrigerant circuit 5, the worker tightens the opening / closing operation part 81 of the manual on-off valve 33, and closes the manual on-off valve 33 so as to block the service port flow path of the seventh refrigerant pipe 32. After the manual on-off valve 33 is closed, the worker removes the refrigerant charging / recovery device from the service port 31.

[0050] After the refrigerant circuit 5 is filled with refrigerant and the manual on-off valve 33 is closed, the operator attaches the cover 53 to the bottom plate 55 and supplies power to the refrigeration cycle apparatus 1. The power supply circuit 66 supplies power to the solenoid valve 34 as a result of power being supplied to the refrigeration cycle apparatus 1. When power is supplied to the solenoid valve 34, the solenoid valve 34 closes so as to block the service port flow path of the seventh refrigerant pipe 32. By closing the solenoid valve 34, the refrigeration cycle apparatus 1 can prevent the refrigerant circulating through the first flow path from leaking through the service port 31 during heating or cooling operation, even if the manual on-off valve 33 is open due to a malfunction.

[0051] In the refrigeration cycle apparatus 1, the solenoid valve 34 opens and closes in conjunction with whether or not power is supplied to the refrigeration cycle apparatus 1, so that the operation for opening the solenoid valve 34 does not need to be performed separately from the operation for cutting off the power supplied to the refrigeration cycle apparatus 1, and the operator can easily perform the work of filling the refrigerant circuit 5 with refrigerant through the service port 31 or recovering it from the refrigerant circuit 5. Furthermore, in the refrigeration cycle apparatus 1, the operation for closing the solenoid valve 34 does not need to be performed separately from the operation for supplying refrigerant to the refrigeration cycle apparatus 1, and the operator can easily perform the work of putting the refrigeration cycle apparatus 1 into a state in which it can perform heating and cooling operations after filling the refrigerant circuit 5 with refrigerant through the service port 31. In addition, the manual on-off valve 33 is disposed between the service port 31 and the solenoid valve 34, so that the manual on-off valve 33 is disposed in an area closer to the opening 74 than the solenoid valve 34. In the refrigeration cycle apparatus 1, the manual on-off valve 33 is disposed in an area closer to the opening 74, so that the operator can easily perform the work of tightening and loosening the opening and closing operation unit 81.

[0052] [Effects of the refrigeration cycle device of the embodiment] The refrigeration cycle device 1 of the embodiment includes a refrigerant circuit 5, a service port 31, a manual on-off valve 33, and a solenoid valve 34. The refrigerant circuit 5 is formed with a refrigerant circulation flow path through which the refrigerant circulates. The service port 31 is connected to the refrigerant circulation flow path via a service port flow path. The manual on-off valve 33 is provided in the middle of the service port flow path. The solenoid valve 34 is provided in series with the manual on-off valve 33 in the middle of the service port flow path. In the refrigeration cycle device 1 of the embodiment, even when one of the manual on-off valve 33 and the solenoid valve 34 is opened due to a malfunction, the other is closed, so that the refrigerant circulating in the refrigerant circulation flow path can be prevented from leaking through the service port 31.

[0053] In addition, the refrigerant used in the refrigeration cycle apparatus 1 of the embodiment is flammable. In the refrigeration cycle apparatus 1 of the embodiment, the refrigerant is prevented from leaking, so that the refrigerant leaking through the service port 31 can be prevented from catching fire, and thus the refrigerant can be prevented from catching fire.

[0054] The refrigeration cycle apparatus 1 of the embodiment further includes a power supply circuit that does not supply power to the solenoid valve 34 when power is not supplied to the refrigeration cycle apparatus 1, and supplies power to the solenoid valve 34 when power is supplied to the refrigeration cycle apparatus 1. The solenoid valve 34 does not close the service port flow path when power is not supplied to the solenoid valve 34, and closes the service port flow path when power is supplied to the solenoid valve 34. A plurality of electrical components of the control device 65 provided in the refrigeration cycle apparatus 1 may generate sparks due to discharge or the like when power is supplied to the refrigeration cycle apparatus 1, but no sparks are generated when power is not supplied to the refrigeration cycle apparatus 1. The refrigeration cycle apparatus 1 of the embodiment can prevent the refrigerant from leaking through the service port 31 when power is supplied to the refrigeration cycle apparatus 1, and can prevent sparks generated from the plurality of electrical components of the control device 65 from igniting the refrigerant. The refrigeration cycle apparatus 1 of the embodiment can prevent the refrigerant from igniting by not generating sparks from the plurality of electrical components of the control device 65 when power is not supplied to the refrigeration cycle apparatus 1. Furthermore, the worker stops the power supply to the refrigeration cycle apparatus 1 when performing a refrigerant charging and recovery operation of charging the refrigerant circuit 5 with refrigerant or recovering refrigerant from the refrigerant circuit 5 via the service port 31. In the refrigeration cycle apparatus 1 of the embodiment, since the power supply to the refrigeration cycle apparatus 1 is stopped when the refrigerant charging and recovery operation is performed, it is not necessary to close the solenoid valve 34 when performing the refrigerant charging and recovery operation, and the refrigerant charging and recovery operation can be easily performed.

[0055] The refrigeration cycle apparatus 1 of the embodiment further includes a control device 65 that operates using power supplied to the refrigeration cycle apparatus 1. The service port 31 is formed so that the refrigerant that flows through the service port flow path toward the service port 31 is discharged in a discharge direction 82. The service port 31 is arranged so that the control device 65 is not arranged in a discharge area 83 formed on the side of the service port 31 on the discharge direction 82. In the refrigeration cycle apparatus 1 of the embodiment, since the electric component storage space 69 is not arranged in the discharge area 83 on the side of the service port 31 on the discharge direction 82, even when the refrigerant leaks through the service port 31, the refrigeration cycle apparatus 1 of the embodiment can suppress the refrigerant from accumulating in the electric component storage space 69. Since the refrigeration cycle apparatus 1 of the embodiment suppresses the refrigerant from accumulating in the electric component storage space 69, the refrigeration cycle apparatus 1 of the embodiment can suppress the formation of a flammable area in the electric component storage space 69, suppress the refrigerant from being ignited by sparks generated by the multiple electric components of the control device 65, and suppress the ignition in the electric component storage space 69.

[0056] The refrigeration cycle apparatus 1 of the embodiment further includes a housing 51. The housing 51 includes an opening 74, a refrigerant circuit component storage space 68 connected to the outside via the opening 74, and a cover 53 that covers the opening 74. The refrigerant circuit component storage space 68 includes a service port storage space 73 and an electric component storage space 69. The control device 65 is disposed in the electric component storage space 69 adjacent to the service port storage space 73. The service port 31 is disposed in the service port storage space 73 such that the opening 74 is disposed in the discharge area 83. The refrigeration cycle apparatus 1 of the embodiment can facilitate a refrigerant charging and recovering operation in which an operator charges a refrigerant into the refrigerant circuit 5 or recovers a refrigerant from the refrigerant circuit 5 via the service port 31 by performing the operation with the cover 53 removed from the housing 51. Furthermore, in the refrigeration cycle device 1 of the embodiment, since the control device 65 is not arranged in the discharge area 83 on the side of the discharge direction 82 of the service port 31, even when refrigerant leaks through the service port 31, the formation of a flammable area in the electrical component storage space 69 in which the control device 65 is arranged can be prevented, and fire in the electrical component storage space 69 can be prevented.

[0057] The refrigerant circuit 5 of the refrigeration cycle apparatus 1 of the embodiment includes a compressor 11 that compresses the refrigerant and an expansion valve 15 that reduces the pressure of the refrigerant. The service port 31 is connected to a low-pressure side flow path in which the low-pressure refrigerant reduced in pressure by the expansion valve 15 flows through a service port flow path. The refrigeration cycle apparatus 1 of the embodiment can reduce the pressure of the refrigerant flowing through the service port flow path, and can slow down the flow rate of the refrigerant discharged from the service port 31 even when the refrigerant leaks from the refrigerant circuit 5 through the service port 31. The refrigeration cycle apparatus 1 of the embodiment can suppress the formation of a flammable region in which the concentration of the refrigerant is included in the flammable range by slowing down the flow rate of the refrigerant discharged from the service port 31.

[0058] Incidentally, the connection part 35 of the refrigeration cycle apparatus 1 in the above-described embodiment is provided in the middle of the first refrigerant pipe 21, but may be provided in the middle of the fourth refrigerant pipe 24 or the sixth refrigerant pipe 26 when the refrigeration cycle apparatus 1 is used exclusively for heating, and may be provided in the middle of the third refrigerant pipe 23 or the fifth refrigerant pipe 25 when the refrigeration cycle apparatus 1 is used exclusively for cooling. Even in this case, the refrigeration cycle apparatus 1 can prevent the refrigerant circulating in the refrigerant circulation passage from leaking through the refrigerant circuit 5 via the service port 31, and can suppress the formation of a flammable region where the concentration of the refrigerant falls within the flammable range.

[0059] Incidentally, the service port portion 30 of the refrigeration cycle apparatus 1 of the embodiment described above is disposed in the service port storage space 73 so that the area of ​​the opening 74 that is blocked by the side cover 62 overlaps with the discharge area 83, but it may be disposed so that the area of ​​the opening 74 that is blocked by the front cover 61 or the rear cover 63 overlaps with the discharge area 83. Even in this case, the refrigeration cycle apparatus 1 can prevent the refrigerant circulating through the refrigerant circulation passage from leaking from the refrigerant circuit 5 through the service port 31, as in the refrigeration cycle apparatus 1 of the embodiment described above, and can facilitate the work of the operator.

[0060] Incidentally, the service port portion 30 of the refrigeration cycle apparatus 1 of the above-described embodiment may be arranged so that the opening 74 is not arranged in the discharge area 83. For example, the service port portion 30 may be arranged in the service port storage space 73 so that the refrigerant piping storage space 72 or the partition plate 64 is arranged in the discharge area 83. The refrigeration cycle apparatus 1 can prevent the refrigerant from leaking through the service port 31 even when something other than the opening 74 is arranged in the discharge area 83.

[0061] In the refrigeration cycle apparatus 1 of the above-described embodiment, for example, a refrigerant having high flammability is circulated through the refrigerant circulation flow path, but a refrigerant that is not flammable, such as a high flammability, may be circulated through the refrigerant circulation flow path. Even in this case, the refrigeration cycle apparatus 1 can prevent the refrigerant circulating through the refrigerant circulation flow path from leaking from the refrigerant circuit 5 through the service port 31.

[0062] Incidentally, the refrigeration cycle apparatus 1 of the above-described embodiment is provided with the water circulation circuit 41, but the water circulation circuit 41 may be omitted. In this case, the water-refrigerant heat exchanger 14 is replaced with another indoor heat exchanger that is disposed in the indoor unit 3 and exchanges heat between the refrigerant and the indoor air. Even in this case, the refrigeration cycle apparatus 1 can prevent the refrigerant circulating through the refrigerant circulation passage from leaking from the refrigerant circuit 5 through the service port 31.

[0063] Incidentally, the connection part 35 of the refrigeration cycle apparatus 1 of the embodiment described above is provided midway through the first refrigerant pipe 21 forming part of the low-pressure side flow path through which the refrigerant decompressed by the expansion valve 15 flows in the refrigerant circulation flow path, but may be provided midway through the high-pressure side flow path through which the refrigerant compressed by the compressor 11 flows in the refrigerant circulation flow path. Even in this case, the refrigeration cycle apparatus 1 can prevent the refrigerant circulating in the refrigerant circulation flow path from leaking from the refrigerant circuit 5 through the service port 31.

[0064] Incidentally, the manual on-off valve 33 of the refrigeration cycle apparatus 1 of the embodiment described above is provided closer to the service port 31 than the solenoid valve 34, but it may be provided farther from the service port 31 than the solenoid valve 34. Even in this case, the refrigeration cycle apparatus 1 can prevent the refrigerant circulating in the refrigerant circulation passage from leaking from the refrigerant circuit 5 through the service port 31.

[0065] Incidentally, the solenoid valve 34 of the refrigeration cycle apparatus 1 of the above-described embodiment may be replaced with another on-off valve that is operated by an operator to open so as not to block the flow path for the service port of the seventh refrigerant pipe 32, or close so as to block the flow path for the service port of the seventh refrigerant pipe 32. In this case, the operator closes the on-off valve when the manual on-off valve 33 is closed, and opens the on-off valve when the manual on-off valve 33 is opened. Even when a malfunction occurs in the manual on-off valve 33, the refrigeration cycle apparatus 1 can prevent the refrigerant circulating in the refrigerant circulation flow path from leaking from the refrigerant circuit 5 through the service port 31 because the on-off valve is closed.

[0066] Although the embodiments have been described above, the embodiments are not limited to the above. The above-described components include those that can be easily imagined by a person skilled in the art, those that are substantially the same, and those that are within the so-called equivalent range. Furthermore, the above-described components can be appropriately combined. Furthermore, at least one of various omissions, substitutions, and modifications of the components can be made without departing from the gist of the embodiments. [Explanation of symbols]

[0067] 1: Refrigeration cycle device 2:Outdoor unit 3: Indoor unit 5: Refrigerant circuit 11: Compressor 14: Water-refrigerant heat exchanger (condenser) (evaporator) 15: Expansion valve 16: Outdoor heat exchanger (condenser) (evaporator) 31: Service port 33: Manual opening and closing valve (first valve) 34: Solenoid valve (second valve) 51: Cabinet 53: Cover 66:Power circuit 68: Refrigerant circuit component storage space (internal space) 74: Opening 82: Emission direction 83: Emission area

Claims

1. a refrigerant circuit in which a first flow path through which a refrigerant circulates is formed; a service port connected to the first flow path via a second flow path; a first valve provided in the second flow path; a second valve provided in series with the first valve in the second flow path; A refrigeration cycle device comprising:

2. The refrigerant is flammable. The refrigeration cycle device according to claim 1.

3. a power supply circuit that does not supply power to the second valve when power is not supplied to the refrigeration cycle apparatus and that supplies power to the second valve when power is supplied to the refrigeration cycle apparatus; The second valve is The second flow path is not blocked when power is not supplied to the second valve, The second flow path is blocked when power is supplied to the second valve. The refrigeration cycle device according to claim 2.

4. A control device that operates the refrigerant circuit using power supplied to the refrigeration cycle device, The service port is the refrigerant that has flowed through the second flow path toward the service port is discharged to a discharge area that is formed on a side of the service port in a discharge direction, The control device is arranged so as not to be located in the discharge area. The refrigeration cycle device according to claim 3.

5. The electronic device further includes a housing having an opening, an internal space connected to the outside via the opening, and a cover that closes the opening, The control device is disposed in the interior space, The service port is disposed in the interior space such that the opening is disposed in the discharge area. The refrigeration cycle device according to claim 4.

6. The refrigerant circuit includes: A compressor that compresses the refrigerant; an expansion valve for reducing the pressure of the refrigerant; a condenser provided in a high-pressure side flow passage of the first flow passage through which a high-pressure refrigerant compressed by the compressor flows; an evaporator provided in a low-pressure side flow path of the first flow path through which a low-pressure refrigerant decompressed by the expansion valve flows, The service port is connected to the low-pressure side flow path via the second flow path. The refrigeration cycle device according to any one of claims 1 to 5.

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