Outdoor unit, and refrigeration cycle device

Abstract

One aspect of an outdoor unit of the present disclosure is an outdoor unit for a refrigeration cycle device, and comprises: a compressor; a pressure vessel connected to the compressor; a relief pipe connected to the pressure vessel; and a fusible plug which closes an opening formed in the relief pipe. The relief pipe has a connection portion connected to the pressure vessel, and at least one bent portion formed in a portion located between the connection portion and the opening of the relief pipe.

Description

Technical Field

[0001] The present disclosure relates to an outdoor unit and a refrigeration cycle device.

Background Art

[0002] For example, as described in Patent Document 1, a fusible plug installed in an accumulator (pressure vessel) provided in a refrigerant circuit through which refrigerant flows is known. Such a fusible plug melts when the pressure inside the accumulator rises abnormally, etc. Thereby, the pressure inside the accumulator is released.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Inside the accumulator as described above, for example, when the refrigeration cycle device equipped with the accumulator stops abnormally, etc., high-pressure and high-temperature refrigerant may flow in. In this case, the high-pressure and high-temperature refrigerant may come into contact with the fusible plug, and the fusible plug may melt unintentionally. Therefore, even when the pressure inside the accumulator is a pressure that does not need to be released originally, there was a risk that the pressure inside the accumulator would be released.

[0005] In view of the above circumstances, one object of the present disclosure is to provide an outdoor unit having a structure capable of suppressing the accidental melting of a fusible plug, and a refrigeration cycle device including such an outdoor unit.

Means for Solving the Problems

[0006] One aspect of the outdoor unit according to the present disclosure is an outdoor unit of a refrigeration cycle device, comprising a compressor, a pressure vessel connected to the compressor, a relief pipe connected to the pressure vessel, and a thrombolytic agent that closes an opening formed in the relief pipe, wherein the relief pipe has a connection portion connected to the pressure vessel and at least one bent portion formed in a portion of the relief pipe located between the connection portion and the opening. a vertically extending vertical extension portion, has and , the pressure vessel has a cylindrical member extending in the vertical direction and an upper lid member attached to an upper end of the cylindrical member in the vertical direction, and the thrombolytic agent is attached to an upper end of the vertical extension portion in the vertical direction and is located above an upper end of the cylindrical member in the vertical direction .

Advantages of the Invention

[0007] According to the present disclosure, in the outdoor unit of the refrigeration cycle device, it is possible to suppress the accidental melting of the thrombolytic agent.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that the scope of the present disclosure is not limited to the following embodiments and can be arbitrarily changed within the scope of the technical idea of the present disclosure. In the following drawings, in order to make each configuration easier to understand, the scale and number in each structure may be different from those in the actual structure.

[0010] In the drawings, the X-axis, Y-axis, and Z-axis are shown as appropriate. The X-axis indicates one direction in the horizontal direction. The Y-axis indicates the other direction in the horizontal direction. The Z-axis indicates the vertical direction. In the following description, the horizontal direction along the X-axis is referred to as the "front-rear direction X", the horizontal direction along the Y-axis is referred to as the "left-right direction Y", and the vertical direction along the Z-axis is referred to as the "vertical direction Z". The front-rear direction X, the left-right direction Y, and the vertical direction Z are directions orthogonal to each other. In the following description, the side (+Z side) in the vertical direction Z toward which the arrow of the Z-axis points is defined as the upper side in the vertical direction, and the side (-Z side) opposite to the side toward which the arrow of the Z-axis points in the vertical direction Z is defined as the lower side in the vertical direction. In the following description, the upper side in the vertical direction is simply referred to as the "upper side", and the lower side in the vertical direction is simply referred to as the "lower side". Also, the upper side in the vertical direction is simply referred to as the "upper direction", and the lower side in the vertical direction is simply referred to as the "lower direction".

[0011] Also, the side (+X side) in the front-rear direction X toward which the arrow of the X-axis points is defined as the front side, and the side (-X side) opposite to the side toward which the arrow of the X-axis points in the front-rear direction X is defined as the rear side. Also, the left-right direction Y is the left-right direction when the outdoor unit 10 in the following embodiment is viewed from the front (+X side). That is, the side (+Y side) in the left-right direction Y toward which the arrow of the Y-axis points is defined as the right side, and the side (-Y side) opposite to the side toward which the arrow of the Y-axis points in the left-right direction Y is defined as the left side.

[0012] Figure 1 is a schematic diagram showing the schematic configuration of the refrigeration cycle device 100 provided in the outdoor unit 10 in the present embodiment. The refrigeration cycle device 100 is a device that utilizes a refrigeration cycle in which the refrigerant 19 circulates. In the present embodiment, the refrigeration cycle device 100 is an air conditioner. As shown in Figure 1, the refrigeration cycle device 100 includes an outdoor unit 10, an indoor unit 20, and a circulation path section 18. The outdoor unit 10 is arranged outdoors. The indoor unit 20 is arranged indoors. The outdoor unit 10 and the indoor unit 20 are connected to each other by a circulation path section 18 through which the refrigerant 19 circulates. The outdoor unit 10 and the indoor unit 20 are heat exchange units that perform heat exchange with air.

[0013] The refrigeration cycle device 100 can adjust the temperature of the indoor air by performing heat exchange between the refrigerant 19 flowing in the circulation path section 18 and the indoor air in which the indoor unit 20 is arranged. Examples of the refrigerant 19 include fluorine-based refrigerants or hydrocarbon-based refrigerants with a low global warming potential (GWP: Global Warming Potential).

[0014] The outdoor unit 10 includes a housing 11, a compressor 12, a heat exchanger 13, a flow rate adjustment valve 14, a blower 15, a four-way valve 16, a pressure vessel 30, a relief pipe 50, a fusible plug 60, and a control unit (not shown). Inside the housing 11, the compressor 12, the heat exchanger 13, the flow rate adjustment valve 14, the blower 15, the four-way valve 16, the pressure vessel 30, the relief pipe 50, the fusible plug 60, and the control unit (not shown) are accommodated. The control unit (not shown) in the outdoor unit 10 controls each part of the outdoor unit 10. The control unit is, for example, a system control unit that overall controls the entire refrigeration cycle device 100.

[0015] The compressor 12, the heat exchanger 13, the flow rate adjustment valve 14, the four-way valve 16, and the pressure vessel 30 are provided in a portion of the circulation path section 18 that is located inside the housing 11. The compressor 12, the heat exchanger 13, the flow rate adjustment valve 14, the four-way valve 16, and the pressure vessel 30 are connected by a portion of the circulation path section 18 that is located inside the housing 11.

[0016] The four-way valve 16 is provided at a portion of the circulation path section 18 that is connected to the discharge side of the compressor 12. By switching a part of the path of the circulation path section 18, the four-way valve 16 can reverse the direction of the refrigerant 19 flowing in the circulation path section 18. When the path connected by the four-way valve 16 is the path indicated by the solid line in the four-way valve 16 of FIG. 1, the refrigerant 19 flows in the direction indicated by the solid line arrow in FIG. 1 within the circulation path section 18. On the other hand, when the path connected by the four-way valve 16 is the path indicated by the broken line in the four-way valve 16 of FIG. 1, the refrigerant 19 flows in the direction indicated by the broken line arrow in FIG. 1 within the circulation path section 18.

[0017] The indoor unit 20 includes a housing 21, a heat exchanger 22, and a blower 23. Inside the housing 21, the heat exchanger 22 and the blower 23 are accommodated. The indoor unit 20 is capable of a cooling operation for cooling the air in the room where the indoor unit 20 is disposed and a heating operation for heating the air in the room where the indoor unit 20 is disposed.

[0018] When the indoor unit 20 is in the cooling operation, the refrigerant 19 flowing in the circulation path section 18 flows in the direction indicated by the solid line arrow in FIG. 1. That is, when the indoor unit 20 is in the cooling operation, the refrigerant 19 flowing in the circulation path section 18 circulates through the compressor 12, the heat exchanger 13 of the outdoor unit 10, the flow rate adjustment valve 14, the heat exchanger 22 of the indoor unit 20, and the pressure vessel 30 in this order and returns to the compressor 12. In the cooling operation, the heat exchanger 13 in the outdoor unit 10 functions as a condenser, and the heat exchanger 22 in the indoor unit 20 functions as an evaporator.

[0019] On the other hand, when the indoor unit 20 is in the heating operation, the refrigerant 19 flowing in the circulation path section 18 flows in the direction indicated by the broken line in FIG. 1. That is, when the indoor unit 20 is in the heating operation, the refrigerant 19 flowing in the circulation path section 18 circulates through the compressor 12, the heat exchanger 22 of the indoor unit 20, the flow rate adjustment valve 14, the heat exchanger 13 of the outdoor unit 10, and the pressure vessel 30 in this order and returns to the compressor 12. In the heating operation, the heat exchanger 13 in the outdoor unit 10 functions as an evaporator, and the heat exchanger 22 in the indoor unit 20 functions as a condenser.

[0020] Next, the outdoor unit 10 of the present embodiment will be described in more detail. FIG. 2 is a perspective view showing the outdoor unit 10. FIG. 3 is a perspective view showing a part of the outdoor unit 10. As shown in FIG. 2, the housing 11 is in the shape of a substantially rectangular parallelepiped box having surfaces facing the front-rear direction X, the left-right direction Y, and the vertical direction Z respectively. In the present embodiment, two blowers 15 arranged in the vertical direction Z are provided in the housing 11.

[0021] As shown in FIG. 3, the housing 11 has a blower chamber 10a and a machine chamber 10b partitioned from each other by a partition plate 11b. The blower chamber 10a and the machine chamber 10b are arranged adjacent to each other in the left-right direction Y. The dimension of the blower chamber 10a in the left-right direction Y is larger than the dimension of the machine chamber 10b in the left-right direction Y. The blower chamber 10a is located on the left side (-Y side) of the machine chamber 10b. Although not shown, a heat exchanger 13 and a blower 15 are arranged inside the blower chamber 10a. Inside the machine chamber 10b, a compressor 12, a pressure vessel 30, a relief pipe 50, and a fusible plug 60 are arranged. Although not shown, a control unit (not shown) of the outdoor unit 10 is also arranged inside the machine chamber 10b. Inside the machine chamber 10b, the compressor 12 is fixed to the upper surface of the bottom 11a of the housing 11. The compressor 12 is substantially cylindrical and extends in the vertical direction Z. The compressor 12 is located at the lower end of the front side (+X side) inside the machine chamber 10b.

[0022] The pressure vessel 30 is fixed inside the machine chamber 10b to the upper surface of the bottom 11a via a support member 11c. The pressure vessel 30 is located away from the upper surface of the bottom 11a upward. The pressure vessel 30 is located in the right side (+Y side) part inside the machine chamber 10b. The pressure vessel 30 is cylindrical and extends in the vertical direction Z. The lower end of the pressure vessel 30 is located below the upper end of the compressor 12. The upper end of the pressure vessel 30 is located above the upper end of the compressor 12. The pressure vessel 30 is located behind (-X side) the compressor 12. Note that the above-described arrangement relationship between the compressor 12 and the pressure vessel 30 is an example, and the arrangement relationship between the compressor 12 and the pressure vessel 30 is not particularly limited.

[0023] FIG. 4 is a perspective view showing a pressure vessel 30, a relief pipe 50, and a fusible plug 60. FIG. 5 is a perspective view showing a part of the pressure vessel 30, the relief pipe 50, and the fusible plug 60, and is a partially enlarged view of FIG. 4. The pressure vessel 30 can store excess refrigerant 19 therein. The liquid refrigerant 19 is stored in the pressure vessel 30. In the present embodiment, the pressure vessel 30 is an accumulator. Note that the pressure vessel 30 may be any container as long as it can store excess refrigerant 19. As shown in FIG. 4, the pressure vessel 30 has a container portion 31 and a partition member 32.

[0024] The container portion 31 is cylindrical and extends in the vertical direction Z. In the following description, the virtual axis passing through the center of the cylindrical container portion 31 is referred to as the first central axis AX1. The first central axis AX1 is a virtual axis extending in the vertical direction Z. In the following description, unless otherwise specified, the radial direction centered on the first central axis AX1 is simply referred to as the "radial direction", and the circumferential direction around the first central axis AX1 may be simply referred to as the "circumferential direction". The radial direction centered on the first central axis AX1 is the radial direction of the pressure vessel 30 and the radial direction of the cylindrical member 31a described later.

[0025] Liquid refrigerant 19 is stored inside the container portion 31. The container portion 31 is made of, for example, metal. The inside of the container portion 31 is the inside of the pressure vessel 30. The container portion 31 has a cylindrical member 31a, an upper lid member 31b, and a lower lid member 31c.

[0026] The cylindrical member 31a extends in the vertical direction Z about the first central axis AX1 and is cylindrical with openings on both sides in the vertical direction Z. The upper lid member 31b is a lid member attached to the upper end of the cylindrical member 31a. The upper lid member 31b is a substantially hemispherical shell member that opens downward. The upper end of the cylindrical member 31a is fitted inside the lower end of the upper lid member 31b. The upper lid member 31b closes the upper opening of the cylindrical member 31a. The lower lid member 31c is a lid member attached to the lower end of the cylindrical member 31a. The lower lid member 31c is a substantially hemispherical shell member that opens upward. The lower end of the cylindrical member 31a is fitted inside the upper end of the lower lid member 31c. The lower lid member 31c closes the lower opening of the cylindrical member 31a.

[0027] As shown in FIG. 5, an attachment member 40 is fixed to the upper lid member 31b. FIG. 6 is a perspective view showing a part of the upper lid member 31b and the attachment member 40. As shown in FIG. 6, the attachment member 40 is a bent plate-like member. The attachment member 40 is made of, for example, metal. The attachment member 40 has a base portion 41 and an attachment plate portion 42. The base portion 41 projects radially outward from the outer peripheral surface at the lower end of the upper lid member 31b. The base portion 41 is plate-like with its plate surface facing the vertical direction Z. The radially inner end of the base portion 41 extends circumferentially along the outer peripheral surface at the lower end of the upper lid member 31b. The radially inner end of the base portion 41 is fixed to the outer peripheral surface at the lower end of the upper lid member 31b by, for example, welding. Thereby, the attachment member 40 is fixed to the pressure vessel 30.

[0028] Note that, among the radial directions about the first central axis AX1, the radial direction in which the base portion 41 projects is referred to as the "first direction D1" and is appropriately indicated by the D1 axis in the figure. Also, the direction orthogonal to both the vertical direction Z and the first direction D1 is referred to as the "second direction D2" and is appropriately indicated by the D2 axis in the figure.

[0029] The mounting plate portion 42 protrudes upward from the radially outer end of the base portion 41. The mounting plate portion 42 is plate-shaped with its plate surface facing the radial direction. A pair of recesses 43a and 43b are respectively formed at both edge portions of the mounting plate portion 42 in the second direction D2. Each of the pair of recesses 43a and 43b is recessed in the second direction D2 toward the other recess of the pair of recesses 43a and 43b. The pair of recesses 43a and 43b are formed at the central portion of the mounting plate portion 42 in the vertical direction Z.

[0030] As shown in FIG. 4, the partition member 32 is a member that partitions the inside of the container portion 31 in the vertical direction Z. In the present embodiment, the partition member 32 is a plate-shaped baffle plate with its plate surface facing the vertical direction Z. The partition member 32 is disk-shaped about the first central axis AX1. In the present embodiment, the partition member 32 is disposed in the upper portion inside the cylindrical member 31a. The partition member 32 is located above the center of the pressure vessel 30 in the vertical direction Z. Note that the position of the partition member 32 in the vertical direction Z within the container portion 31 described above is an example, and the position of the partition member 32 in the vertical direction Z within the container portion 31 is not particularly limited. As shown in FIG. 5, the partition member 32 includes a disk portion 32a that is disk-shaped about the first central axis AX1, and a fixing plate portion 32b that protrudes upward from the radially outer edge portion of the disk portion 32a.

[0031] The disk portion 32a is fitted into the cylindrical member 31a. Two pipe insertion holes 32c that penetrate the disk portion 32a in the vertical direction Z are formed in the disk portion 32a. A second pipe 18b, which will be described later, is passed through the two pipe insertion holes 32c. In the present embodiment, the pipe insertion holes 32c are circular holes. A cylindrical burring portion 32e that protrudes upward is formed at the peripheral edge portion of each pipe insertion hole 32c by burring.

[0032] The disk portion 32a is formed with a through hole 32d that penetrates the disk portion 32a in the vertical direction Z. In the present embodiment, the through hole 32d is a circular hole. A plurality of through holes 32d are formed. The inner diameter of the through hole 32d is smaller than the inner diameter of the pipe insertion hole 32c. Note that the inner diameter of the through hole 32d may be larger than the inner diameter of the pipe insertion hole 32c, or may be the same as the inner diameter of the pipe insertion hole 32c.

[0033] The fixing plate portion 32b is plate-shaped and curved along the inner peripheral surface of the cylindrical member 31a. The fixing plate portion 32b is fixed to the inner peripheral surface of the cylindrical member 31a, for example. A plurality of fixing plate portions 32b are arranged at intervals in the circumferential direction.

[0034] The first pipe 18a and the second pipe 18b are connected to the pressure vessel 30. The first pipe 18a and the second pipe 18b are pipes that form part of the circulation path portion 18. As shown in FIG. 1, the first pipe 18a is a pipe that connects the four-way valve 16 and the pressure vessel 30. The second pipe 18b is a pipe that connects the compressor 12 and the pressure vessel 30. The first pipe 18a is an inflow pipe that allows the refrigerant 19 to flow into the pressure vessel 30. The second pipe 18b is an outflow pipe that allows the refrigerant 19 in the pressure vessel 30 to flow out.

[0035] As shown in FIG. 5, the first pipe 18a penetrates the upper lid member 31b in the vertical direction Z. The first pipe 18a has an extended pipe portion 18c that extends in the vertical direction Z and penetrates the upper lid member 31b in the vertical direction Z, and a curved pipe portion 18d that curves and extends horizontally from the lower end portion of the extended pipe portion 18c. The curved pipe portion 18d is located inside the container portion 31. The tip end portion of the curved pipe portion 18d is one end portion of the first pipe 18a and is an inlet portion 18h that opens to a portion above the partition member 32 inside the container portion 31. The inlet portion 18h opens, for example, to the right (+Y direction) and downward. Note that the opening direction of the inlet portion 18h is not particularly limited. The inlet portion 18h is the lower end portion of the portion of the first pipe 18a that is located inside the pressure vessel 30 and is located above and away from the partition member 32.

[0036] The other end of the first pipe 18a is provided at the tip of the pipe portion that connects to the upper end of the extended pipe portion 18c. As shown in FIG. 1, the other end of the first pipe 18a is connected to the four-way valve 16 outside the pressure vessel 30.

[0037] As shown in FIG. 4, the second pipe 18b has a first extended pipe portion 18e, a bent pipe portion 18f, and a second extended pipe portion 18g. The first extended pipe portion 18e is located inside the container portion 31. The first extended pipe portion 18e extends in the vertical direction Z. The first extended pipe portion 18e is passed vertically through one of the two pipe insertion holes 32c. The first extended pipe portion 18e is fitted and fixed within the one pipe insertion hole 32c. The upper end of the first extended pipe portion 18e is one end of the second pipe 18b and is an outlet portion 18i that opens into a portion above the partition member 32 inside the container portion 31. The outlet portion 18i opens upward. Note that the opening direction of the outlet portion 18i is not particularly limited. The outlet portion 18i is located above the partition member 32. The outlet portion 18i is located below the inlet portion 18h. Note that the relative positional relationship between the inlet portion 18h and the outlet portion 18i is not particularly limited.

[0038] The second extended pipe portion 18g extends in the vertical direction Z. The second extended pipe portion 18g is located inside the container portion 31 except for its upper end. The second extended pipe portion 18g is passed vertically through the other of the two pipe insertion holes 32c. The second extended pipe portion 18g is fitted and fixed within the other pipe insertion hole 32c. The upper end of the second extended pipe portion 18g is located above the outlet portion 18i. The upper end of the second extended pipe portion 18g penetrates the upper lid member 31b in the vertical direction Z and protrudes upward from the upper lid member 31b. The second extended pipe portion 18g is arranged adjacent to the first extended pipe portion 18e horizontally with a space therebetween. The second extended pipe portion 18g is located, for example, to the right (+Y direction) of the first extended pipe portion 18e.

[0039] The lower end of the first extended pipe portion 18e and the lower end of the second extended pipe portion 18g are connected to each other by a bent pipe portion 18f. The bent pipe portion 18f is a U-shaped pipe portion that opens upward. The bent pipe portion 18f is located at the lower end inside the container portion 31.

[0040] The other end of the second pipe 18b is provided at the tip of a pipe portion that leads to the upper end of the second extended pipe portion 18g. As shown in FIG. 1, the other end of the second pipe 18b is connected to the compressor 12. More specifically, the other end of the second pipe 18b is connected to the suction side of the compressor 12. Thereby, the pressure vessel 30 is connected to the suction side of the compressor 12. The pressure of the refrigerant 19 on the suction side of the compressor 12 is lower than the pressure of the refrigerant 19 on the discharge side of the compressor 12. That is, the suction side of the compressor 12 is the low-pressure side, and the discharge side of the compressor 12 is the high-pressure side.

[0041] The refrigerant 19 flows into the portion of the interior of the container portion 31 of the pressure vessel 30 that is located above the partition member 32 from the inlet portion 18h of the first pipe 18a. The refrigerant 19 that has flowed into the container portion 31 from the inlet portion 18h is, for example, in a gas-liquid two-phase state. Of the refrigerant 19 that has flowed into the container portion 31 from the inlet portion 18h, the liquid refrigerant 19 flows through the through-hole 32d formed in the partition member 32 into the portion of the interior of the container portion 31 that is located below the partition member 32 and is stored in the container portion 31. FIG. 7 is a cross-sectional view showing a part of the pressure vessel 30 and a part of the relief pipe 50. As shown in FIG. 7, the liquid level RS of the refrigerant 19 stored in the container portion 31 is, for example, likely to be below the partition member 32.

[0042] Of the refrigerant 19 that has flowed into the container portion 31 from the inlet portion 18h, the gaseous refrigerant 19 flows out from the outlet portion 18i into the second pipe 18b. The gaseous refrigerant 19 that has flowed out into the second pipe 18b enters the compressor 12 from the suction side and is compressed by the compressor 12. In this way, the refrigerant 19 in the gas-liquid two-phase state that has flowed into the pressure vessel 30 is separated into gas and liquid by the partition member 32. Since the liquid refrigerant 19 can be stored in the pressure vessel 30, it is possible to suppress an excessive amount of the refrigerant 19 from flowing into the compressor 12.

[0043] As shown in FIG. 7, the relief pipe 50 is connected to the pressure vessel 30. The inside of the relief pipe 50 is connected to the inside of the pressure vessel 30. In the present embodiment, the relief pipe 50 is a pipe that extends in a substantially L shape. The relief pipe 50 has a radially extending portion 50a and a vertically extending portion 50b.

[0044] The radially extending portion 50a extends in the radial direction of the pressure vessel 30. In the present embodiment, the radially extending portion 50a is cylindrical and extends in the first direction D1 in the radial direction. The radially extending portion 50a is passed through the fixing hole 31d formed in the cylindrical member 31a in the radial direction (first direction D1).

[0045] The fixing hole 31d penetrates the cylindrical member 31a in the radial direction (first direction D1) from the inner peripheral surface to the outer peripheral surface. A cylindrical burring portion 31e that protrudes radially outward (+D1 side) is formed at the peripheral edge of the fixing hole 31d by burring. The fixing hole 31d is located below the partition member 32.

[0046] The radially extending portion 50a is located below the partition member 32. The radially inner (-D1 side) end of the radially extending portion 50a opens to a portion inside the container portion 31 that is located below the partition member 32. The radially inner end of the radially extending portion 50a is located radially inward of the inner peripheral surface of the cylindrical member 31a. The radially outer end of the radially extending portion 50a is located radially outward of the outer peripheral surface of the cylindrical member 31a. Thereby, the radially extending portion 50a protrudes radially outward from the cylindrical member 31a.

[0047] The radially extending portion 50a has a connecting portion 50i connected to the pressure vessel 30. In the present embodiment, the connecting portion 50i is connected to the cylindrical member 31a. The connecting portion 50i is fixed to the cylindrical member 31a by, for example, welding or the like. The connecting portion 50i is inserted into the fixing hole 31d and the burring portion 31e in the radially extending portion 50a. The space between the connecting portion 50i and the fixing hole 31d is sealed. The connecting portion 50i is located below the partition member 32.

[0048] The vertically extending portion 50b extends in the vertical direction Z. The vertically extending portion 50b extends upward from the radially outer end of the radially extending portion 50a. The vertically extending portion 50b has a cylindrical shape that opens upward. The vertically extending portion 50b is arranged away from the pressure vessel 30 in the first direction D1.

[0049] In the following description, the virtual axis passing through the center of the cylindrical vertically extending portion 50b is referred to as the second central axis AX2. The second central axis AX2 is a virtual axis extending in the vertical direction Z. In the present embodiment, the second central axis AX2 is parallel to the first central axis AX1. Note that the second central axis AX2 may extend in a direction inclined with respect to the first central axis AX1.

[0050] FIG. 8 is a perspective view showing a part of the pressure vessel 30, a part of the relief pipe 50, and the dissolvable plug 60. FIG. 9 is a cross-sectional view showing a part of the pressure vessel 30, a part of the relief pipe 50, and the dissolvable plug 60. FIG. 10 is a perspective view showing a part of the procedure for attaching the dissolvable plug 60 to the relief pipe 50. FIG. 11 is a perspective view showing another part of the procedure for attaching the dissolvable plug 60 to the relief pipe 50.

[0051] As shown in FIGS. 8 and 9, the vertically extending portion 50b has a main body pipe portion 50c and a flare pipe portion 50d connected above the main body pipe portion 50c. In the present embodiment, the main body pipe portion 50c and the flare pipe portion 50d are separate from each other. The main body pipe portion 50c and the flare pipe portion 50d are fixed to each other by, for example, welding. Note that the flare pipe portion 50d may be integrally formed with the main body pipe portion 50c.

[0052] The main body pipe portion 50c extends in the vertical direction Z and is cylindrical with an upward opening. The main body pipe portion 50c has a large diameter portion 50e and a connecting portion 50f connected to the upper end of the large diameter portion 50e. The large diameter portion 50e and the connecting portion 50f are cylindrical and extend in the vertical direction Z. The upper end of the connecting portion 50f is the upper end of the main body pipe portion 50c. The outer diameter of the connecting portion 50f is smaller than the outer diameter of the large diameter portion 50e. The inner diameter of the connecting portion 50f is smaller than the inner diameter of the large diameter portion 50e. The lower end of the main body pipe portion 50c and the radially outer end of the radially extending portion 50a are connected to each other and are, for example, integrally formed.

[0053] As shown in FIGS. 9 and 10, the flare pipe portion 50d extends in the vertical direction Z and is cylindrical with openings on both sides in the vertical direction Z. The flare pipe portion 50d has a small diameter portion 50g and a diameter-expanded portion 50h. The small diameter portion 50g is cylindrical and extends in the vertical direction Z. The small diameter portion 50g is located above the large diameter portion 50e. The outer diameter of the small diameter portion 50g is smaller than the outer diameter of the large diameter portion 50e and the outer diameter of the connecting portion 50f. The inner diameter of the small diameter portion 50g is smaller than the inner diameter of the large diameter portion 50e and the inner diameter of the connecting portion 50f. The lower end of the small diameter portion 50g is fitted and fixed within the connecting portion 50f of the main body pipe portion 50c.

[0054] The diameter-expanded portion 50h is formed at the upper end of the small-diameter portion 50g. The diameter-expanded portion 50h extends upward and radially outward about the second central axis AX2 from the upper end of the small-diameter portion 50g. The inner diameter and the outer diameter of the diameter-expanded portion 50h increase as it extends upward. The inner peripheral surface and the outer peripheral surface of the diameter-expanded portion 50h have the same shape as the outer peripheral surface of a truncated cone whose diameter increases as it extends upward. The diameter-expanded portion 50h is the upper end of the vertically extending portion 50b. The upper end of the diameter-expanded portion 50h is located above the upper end of the cylindrical member 31a and the upper end of the mounting member 40. The upper end of the diameter-expanded portion 50h is located below the upper end of the upper lid member 31b. The diameter-expanded portion 50h is the portion where the thrombolytic agent 60 is attached.

[0055] The diameter-expanded portion 50h opens upward. The opening of the diameter-expanded portion 50h is the opening 50s formed in the relief pipe 50. In the present embodiment, the opening 50s opens upward. As shown in FIG. 9, the opening 50s is blocked by the thrombolytic agent 60. As shown in FIG. 10, the opening 50s is open to the outside of the pressure vessel 30 when the thrombolytic agent 60 is not attached. The opening 50s is located above the upper end of the cylindrical member 31a.

[0056] As shown in FIGS. 5 and 7, the connection portion between the radially extending portion 50a and the vertically extending portion 50b is a bent portion 51 that bends upward from the radially extending portion 50a toward the vertically extending portion 50b. The bent portion 51 is formed at the connection portion between the radially outer end of the radially extending portion 50a and the lower end of the vertically extending portion 50b. That is, the lower end of the vertically extending portion 50b is connected to the radially outer end of the radially extending portion 50a via the bent portion 51. The bent portion 51 is located radially outside (+D1 side) of the connection portion 50i. As shown in FIG. 5, the bent portion 51 is located below the opening 50s. The bent portion 51 is formed in the portion of the relief pipe 50 located between the connection portion 50i and the opening 50s.

[0057] As shown in FIG. 9, the dissolvable plug 60 is attached to the relief pipe 50. More specifically, the dissolvable plug 60 is attached to the upper end of the vertically extending portion 50b, that is, the enlarged diameter portion 50h. The dissolvable plug 60 closes the opening 50s formed in the relief pipe 50. As shown in FIGS. 9 and 11, the dissolvable plug 60 is a bolt having a male thread portion 61a formed on its outer peripheral surface. The dissolvable plug 60 is arranged coaxially with the vertically extending portion 50b with the second central axis AX2 as the center. The dissolvable plug 60 has a bolt main body portion 61, a head portion 62, and a plug portion 63.

[0058] The bolt main body portion 61 is columnar and extends in the vertical direction Z with the second central axis AX2 as the center. A male thread portion 61a is formed on the outer peripheral surface of the bolt main body portion 61. The head portion 62 is connected to the upper end of the bolt main body portion 61. In the present embodiment, the head portion 62 is hexagonal columnar. The head portion 62 projects outward from the bolt main body portion 61 in the radial direction with the second central axis AX2 as the center.

[0059] The plug portion 63 is connected to the lower end of the bolt main body portion 61. The plug portion 63 is columnar with the second central axis AX2 as the center. The outer diameter of the plug portion 63 is larger than the inner diameter at the lower end of the enlarged diameter portion 50h and smaller than the inner diameter at the upper end of the enlarged diameter portion 50h. The lower end of the plug portion 63 is inserted into the enlarged diameter portion 50h from above and is in contact with the inner peripheral surface of the enlarged diameter portion 50h. The inside of the enlarged diameter portion 50h is blocked by the plug portion 63. Thereby, the upper opening of the vertically extending portion 50b, that is, the opening 50s, is blocked by the dissolvable plug 60.

[0060] In the present embodiment, the dissolvable plug 60 is located above the partition member 32. The dissolvable plug 60 is located above the upper end of the cylindrical member 31a. The upper end of the dissolvable plug 60 is, for example, located at the same position as the upper end of the pressure vessel 30 in the vertical direction Z. In the present embodiment, the upper end of the dissolvable plug 60 is the upper end of the head portion 62.

[0061] The material constituting the fusible plug 60 is an alloy with a relatively low melting temperature. The melting temperature of the fusible plug 60 is set, for example, below the critical temperature of the refrigerant 19 used. As an example, when R410A is used as the refrigerant 19, since the critical temperature of R410A is 71.4°C, the melting temperature of the fusible plug 60 is set to 70°C, which is lower than 71.4°C. Note that the melting temperature of the fusible plug 60 is not particularly limited and can be appropriately determined according to the type of the refrigerant 19 and the like.

[0062] For example, when an abnormal pressure occurs in the circulation path portion 18 during the operation of the outdoor unit 10, the pressure in the pressure vessel 30 rises, and the temperature in the pressure vessel 30 becomes equal to or higher than the melting temperature of the fusible plug 60. As a result, the fusible plug 60 melts, and the opening 50s of the relief pipe 50 is opened to the outside of the pressure vessel 30. Therefore, the refrigerant 19 in the pressure vessel 30 is discharged to the outside of the pressure vessel 30 through the opening 50s, and the pressure in the pressure vessel 30 can be reduced. Therefore, it is possible to suppress damage to each pipe through which the refrigerant 19 flows, and it is possible to suppress an abnormal operation of the outdoor unit 10.

[0063] In the present embodiment, the fusible plug 60 is fixed to the relief pipe 50 via a flare nut 52. The flare nut 52 is a member for fixing the fusible plug 60 to the relief pipe 50. As shown in FIG. 9, the flare nut 52 has a cylindrical shape that opens on both sides in the vertical direction Z. Inside the flare nut 52, the bolt main body portion 61 and the plug portion 63 in the fusible plug 60 and the enlarged diameter portion 50h are located.

[0064] On the inner peripheral surface of the flare nut 52, a female thread portion 52c and a support portion 52d are formed. The female thread portion 52c is formed on the inner peripheral surface of the upper portion 52a of the flare nut 52. The female thread portion 52c meshes with a male thread portion 61a formed on the outer peripheral surface of the thrombolytic agent 60. The support portion 52d is formed on the inner peripheral surface of the lower portion 52b of the flare nut 52. The support portion 52d is located below the female thread portion 52c and above the lower end portion of the flare nut 52. The support portion 52d is a portion where the inner diameter becomes smaller as it goes downward. The support portion 52d supports the enlarged diameter portion 50h from below.

[0065] The small diameter portion 50g is passed through the lower end portion of the flare nut 52. The inner diameter at the lower end portion of the flare nut 52 is larger than the outer diameter of the small diameter portion 50g. The inner diameter at the lower end portion of the flare nut 52 is smaller than the inner diameter at the upper end portion of the flare nut 52, the outer diameter of the enlarged diameter portion 50h, the outer diameter of the connecting portion 50f, and the outer diameter of the large diameter portion 50e.

[0066] The head portion 62 of the thrombolytic agent 60 is in contact with the upper end face of the flare nut 52. The space between the upper end face of the flare nut 52 and the lower face of the head portion 62 is sealed. As shown in FIG. 10, in the present embodiment, the upper portion 52a of the flare nut 52 has the same shape as a hexagonal nut. The outer diameter of the lower portion 52b of the flare nut 52 becomes smaller as it goes downward.

[0067] As shown in FIG. 9, when the male thread portion 61a of the thrombolytic agent 60 is tightened into the female thread portion 52c of the flare nut 52, the support portion 52d is pressed against the enlarged diameter portion 50h from below, and the plug portion 63 of the thrombolytic agent 60 is pressed against the enlarged diameter portion 50h from above. Thereby, the thrombolytic agent 60 is fixed to the relief pipe 50, and the opening 50s is blocked by the thrombolytic agent 60.

[0068] In the present embodiment, the outdoor unit 10 includes an elastic member 53. The elastic member 53 is attached to the vertically extending portion 50b. In the present embodiment, the elastic member 53 is attached to the small-diameter portion 50g. The elastic member 53 is a cylindrical member that extends in the vertical direction Z and has openings on both sides in the vertical direction Z. The material constituting the elastic member 53 is, for example, rubber. The elastic member 53 is, for example, a rubber tube. The elastic member 53 is fixed to the outer peripheral surface of the small-diameter portion 50g. The elastic member 53 surrounds the small-diameter portion 50g. In the example of FIG. 9, the upper end portion of the elastic member 53 is in contact with the lower end portion of the flare nut 52. The elastic member 53 is located on the radially outer side (+D1 side) of the mounting plate portion 42 of the mounting member 40 and is in contact with the radially outer surface of the mounting plate portion 42. Although not shown, a cut is formed in the elastic member 53 that extends in the vertical direction Z from the upper end to the lower end of the elastic member 53. By widening the cut, the elastic member 53 can be attached to and detached from the small-diameter portion 50g in the radial direction about the second central axis AX2.

[0069] The outdoor unit 10 includes a binding band 54 that fixes the vertically extending portion 50b to the mounting member 40 in a state where at least a part of the elastic member 53 is sandwiched between the vertically extending portion 50b and the mounting member 40. In the present embodiment, the portion of the elastic member 53 that is disposed closer to the mounting plate portion 42 than the small-diameter portion 50g is sandwiched between the small-diameter portion 50g and the mounting plate portion 42 in the radial direction (first direction D1). The binding band 54 is annular and surrounds the small-diameter portion 50g, the elastic member 53, and the mounting plate portion 42. The binding band 54 is in contact with the elastic member 53 and the mounting plate portion 42 and presses the elastic member 53 and the mounting plate portion 42 against each other. As shown in FIG. 8, the binding band 54 passes through the recess 43a formed in the mounting plate portion 42. Although not shown, the binding band 54 also passes through the recess 43b formed in the mounting plate portion 42.

[0070] As shown in FIG. 10, before the soluble plug 60 is attached to the relief pipe 50, the flare nut 52 is positioned below and away from the enlarged diameter portion 50h. As shown in FIG. 11, after the operator places the soluble plug 60 above the enlarged diameter portion 50h from above, the operator moves the flare nut 52 upward. After the female thread portion 52c of the flare nut 52 contacts the male thread portion 61a of the soluble plug 60, the operator rotates the flare nut 52 or the soluble plug 60 around the second central axis AX2 using a wrench or the like to engage the male thread portion 61a and the female thread portion 52c. Thereby, the soluble plug 60 is attached to the relief pipe 50. After the soluble plug 60 is attached to the relief pipe 50, the operator attaches the elastic member 53 to the small diameter portion 50g and fixes the small diameter portion 50g together with the elastic member 53 to the mounting plate portion 42 with the binding band 54.

[0071] According to the present embodiment, the outdoor unit 10 includes a compressor 12, a pressure vessel 30 connected to the compressor 12, a relief pipe 50 connected to the pressure vessel 30, and a soluble plug 60 that closes an opening 50s formed in the relief pipe 50. The relief pipe 50 has a connection portion 50i connected to the pressure vessel 30 and a bent portion 51 formed in a portion of the relief pipe 50 located between the connection portion 50i and the opening 50s. Since the bent portion 51 is formed between the connection portion 50i and the opening 50s in this way, it becomes difficult for the refrigerant 19 to reach from the connection portion 50i to the opening 50s in the relief pipe 50. Therefore, even if the high-pressure and high-temperature refrigerant 19 flows into the pressure vessel 30 from the first pipe 18a or the second pipe 18b, it is possible to suppress the high-pressure and high-temperature refrigerant 19 from reaching the soluble plug 60 that closes the opening 50s through the relief pipe 50. Thereby, it is possible to suppress the soluble plug 60 from melting accidentally. Therefore, when the pressure inside the pressure vessel 30 is a pressure that does not need to be released, it is possible to suppress the pressure inside the pressure vessel 30 from being released, and it is possible to suppress the refrigerant 19 from being released from the pressure vessel 30. As described above, according to the present embodiment, a highly reliable outdoor unit 10 can be obtained.

[0072] When the outdoor unit 10 is operating normally, the refrigerant 19 flows into the pressure vessel 30 from the inlet portion 18h of the first pipe 18a regardless of the operating state of the indoor unit 20. On the other hand, for example, when the refrigeration cycle device 100 stops abnormally due to a power outage or the like, the refrigerant 19 that has become high-temperature and high-pressure by the compressor 12 may flow backward and flow into the pressure vessel 30 from the outlet portion 18i of the second pipe 18b. In addition, an abnormality may occur in the switching of the four-way valve 16, and the high-temperature and high-pressure refrigerant 19 discharged from the compressor 12 to the four-way valve 16 may flow from the four-way valve 16 to the first pipe 18a and flow into the pressure vessel 30.

[0073] For example, it is also conceivable to attach the fusible plug to another pipe. However, in this case, the fusible plug is likely to be located close to the connection portion between the pipes, and there is a risk that the fusible plug may melt due to the heat generated during the welding operation for connecting the pipes constituting the circulation path portion 18. On the other hand, as in the present embodiment, by connecting the relief pipe 50 to the pressure vessel 30 and attaching the fusible plug 60 to the relief pipe 50, it is easy to separate the fusible plug 60 from the connection portion between the pipes constituting the circulation path portion 18. Thereby, it is possible to suppress the melting of the fusible plug 60 due to the heat generated during the welding operation for connecting the pipes. Therefore, it is possible to suppress the accidental melting of the fusible plug 60 during the assembly work of the outdoor unit 10.

[0074] In addition, by extending the relief pipe 50 from the pressure vessel 30, it is possible to determine the position where the fusible plug 60 is attached regardless of the position of the pressure vessel 30. Therefore, the opening 50s of the relief pipe 50 can be located in a space where there are relatively few pipes, and the work of attaching the fusible plug 60 can be easily performed. Thereby, the assemblability of the outdoor unit 10 can be improved.

[0075] Further, according to the present embodiment, the relief pipe 50 has a vertically extending portion 50b that extends in the vertical direction Z. The soluble plug 60 is attached to the upper end of the vertically extending portion 50b. Therefore, it is easy to position the soluble plug 60 above the liquid level RS of the liquid refrigerant 19 stored in the pressure vessel 30 in the vertical direction Z. Thereby, it is easy to maintain the refrigerant 19 in contact with the soluble plug 60 in a gaseous state. Therefore, even when the temperature in the pressure vessel 30 rises and a part of the refrigerant 19 in the pressure vessel 30 evaporates, and the refrigerant 19 near the liquid level RS becomes a gas-liquid two-phase state, it is possible to suppress the gas-liquid two-phase state refrigerant 19 from coming into contact with the soluble plug 60. Therefore, it is possible to prevent the soluble plug 60 from being accidentally melted by the gas-liquid two-phase state refrigerant 19.

[0076] Further, according to the present embodiment, the pressure vessel 30 has a cylindrical member 31a that extends in the vertical direction Z and an upper lid member 31b attached to the upper end of the cylindrical member 31a. The soluble plug 60 is located above the upper end of the cylindrical member 31a. Therefore, it is easier to position the soluble plug 60 more preferably above the liquid level RS of the liquid refrigerant 19 stored in the pressure vessel 30 in the vertical direction Z. Therefore, it is possible to more preferably prevent the soluble plug 60 from being accidentally melted by the gas-liquid two-phase state refrigerant 19.

[0077] Further, according to the present embodiment, the outdoor unit 10 includes a flare nut 52 that fixes the fusible plug 60 to the relief pipe 50. The vertically extending portion 50b has a large-diameter portion 50e, a small-diameter portion 50g that is located above the large-diameter portion 50e and has an outer diameter smaller than that of the large-diameter portion 50e, and a diameter-expanding portion 50h that is formed at the upper end of the small-diameter portion 50g and has an outer diameter that increases upward. The diameter-expanding portion 50h is located inside the flare nut 52. A male screw portion 61a is formed on the outer peripheral surface of the fusible plug 60. A female screw portion 52c that meshes with the male screw portion 61a and a support portion 52d that supports the diameter-expanding portion 50h from below are formed on the inner peripheral surface of the flare nut 52. The small-diameter portion 50g passes through the lower end of the flare nut 52. Therefore, the fusible plug 60 can be suitably fixed to the relief pipe 50 using the flare nut 52. Further, the inner diameter at the lower end of the flare nut 52 is smaller than the outer diameter of the large-diameter portion 50e. Therefore, even if the flare nut 52 moves downward due to its own weight before the fusible plug 60 is attached to the relief pipe 50, the flare nut 52 does not move below the upper end of the large-diameter portion 50e. Thereby, the flare nut 52 can be kept at a position relatively close to the diameter-expanding portion 50h. Therefore, the operation of fixing the fusible plug 60 using the flare nut 52 can be easily performed. Further, even when the operator accidentally releases the flare nut 52 when performing the operation of attaching the fusible plug 60, it is possible to prevent the flare nut 52 from falling to the lower end of the vertically extending portion 50b. Therefore, the operator can easily grasp the flare nut 52 again by hand and quickly resume the operation of attaching the fusible plug 60.

[0078] Further, according to the present embodiment, the outdoor unit 10 includes a mounting member 40 fixed to the pressure vessel 30, an elastic member 53 attached to the vertically extending portion 50b, and a binding band 54 that fixes the vertically extending portion 50b to the mounting member 40 in a state where at least a part of the elastic member 53 is sandwiched between the vertically extending portion 50b and the mounting member 40. Therefore, the vertically extending portion 50b extending in the vertical direction Z can be fixed to the pressure vessel 30 via the mounting member 40, and vibration of the vertically extending portion 50b can be suppressed. Thereby, it is possible to suppress the vertically extending portion 50b from repeatedly colliding with the pressure vessel 30. Further, since at least a part of the elastic member 53 is located between the vertically extending portion 50b and the mounting member 40, it is possible to suppress vibration during operation of the outdoor unit 10 and vibration when the outdoor unit 10 is transported from being transmitted to the relief pipe 50. Thereby, it is possible to suppress problems such as the thrombolytic agent 60 coming off from the relief pipe 50 due to vibration.

[0079] Further, according to the present embodiment, the elastic member 53 is attached to the small-diameter portion 50g of the vertically extending portion 50b. The binding band 54 fixes the small-diameter portion 50g to the mounting member 40 in a state where at least a part of the elastic member 53 is sandwiched between the small-diameter portion 50g and the mounting member. Since the outer diameter of the small-diameter portion 50g is smaller than the outer diameter of the large-diameter portion 50e, it is easier to attach the elastic member 53 than when the elastic member 53 is attached to the large-diameter portion 50e. Further, since the small-diameter portion 50g has an enlarged-diameter portion 50h formed at the upper end and the outer diameter is smaller than that of the large-diameter portion 50e, it is easy to stand out as a portion for attaching the elastic member 53. Thereby, an operator can easily grasp the position where the elastic member 53 is attached. Therefore, the operation of attaching the elastic member 53 to the vertically extending portion 50b can be facilitated.

[0080] Further, according to the present embodiment, a pair of recesses 43a and 43b are respectively formed at both edge portions of the mounting plate portion 42 in the second direction D2. The binding band 54 passes through the pair of recesses 43a and 43b. Therefore, it is possible to suppress the binding band 54 from shifting in the vertical direction Z with respect to the mounting plate portion 42. Thereby, it is possible to suppress the binding band 54 from coming off, and it is possible to suppress the vertically extending portion 50b from coming off the mounting member 40.

[0081] Further, according to the present embodiment, the mounting member 40 is fixed to the upper lid member 31b. The upper lid member 31b is likely to be smaller in size than the cylindrical member 31a. Therefore, for example, when the mounting member 40 is welded and fixed to the pressure vessel 30 using an automatic welding machine, it is easy to set the upper lid member 31b in the automatic welding machine, and the work of fixing the mounting member 40 to the upper lid member 31b can be easily performed automatically.

[0082] Further, according to the present embodiment, the pressure vessel 30 is cylindrical and extends in the vertical direction Z. The relief pipe 50 has a radially extending portion 50a that extends in the radial direction of the pressure vessel 30. The radially extending portion 50a has a connection portion 50i and protrudes radially outward from the pressure vessel 30. The lower end portion of the vertically extending portion 50b is connected to the radially outer end portion of the radially extending portion 50a via a bent portion 51. Therefore, while the structure of the relief pipe 50 is a relatively simple structure provided with one bent portion 51, it is possible to suppress the dissolvable thrombus 60 from being accidentally melted.

[0083] Also, according to the present embodiment, the outdoor unit 10 includes a first pipe 18a and a second pipe 18b connected to the pressure vessel 30. The pressure vessel 30 has a container portion 31 and a partition member 32 that partitions the inside of the container portion 31 in the vertical direction Z. One end of the first pipe 18a and one end of the second pipe 18b open to a portion above the partition member 32 inside the pressure vessel 30. The connection portion 50i is located below the partition member 32. Therefore, even when the high-temperature and high-pressure refrigerant 19 flows into the container portion 31 from the first pipe 18a or the second pipe 18b, the high-temperature and high-pressure refrigerant 19 can be blocked by the partition member 32 and is less likely to directly flow into the relief pipe 50. Further, the partition member 32 functions as a baffle plate for separating the gas-liquid two-phase refrigerant 19, and the liquid refrigerant 19 is stored below the partition member 32 in the container portion 31. Since the temperature of the refrigerant 19 stored in the container portion 31 is relatively low, even if the high-temperature and high-pressure refrigerant 19 flows below the partition member 32 through the through-hole 32d, the temperature of the high-temperature and high-pressure refrigerant 19 is lowered by the stored refrigerant 19. Thereby, it is possible to preferably suppress the high-temperature and high-pressure refrigerant 19 from flowing into the relief pipe 50. As described above, it is possible to more preferably suppress the thrombolytic agent 60 from being accidentally melted.

[0084] Also, according to the present embodiment, the thrombolytic agent 60 is located above the partition member 32. Therefore, it is easy to position the thrombolytic agent 60 above the liquid level RS of the liquid refrigerant 19 stored in the pressure vessel 30 in the vertical direction Z. Thereby, in the same manner as described above, it is possible to suppress the thrombolytic agent 60 from being accidentally melted by the gas-liquid two-phase refrigerant 19.

[0085] Also, according to the present embodiment, the pressure vessel 30 is connected to the suction side of the compressor 12. Therefore, it is difficult for the high-temperature and high-pressure refrigerant 19 to flow into the pressure vessel 30, and it is possible to more preferably suppress the thrombolytic agent 60 from being accidentally melted.

[0086] Although the embodiments in the present disclosure have been described above, the present disclosure is not limited only to the configurations of the above-described embodiments, and the following configurations and methods can also be adopted.

[0087] The relief pipe may have any shape as long as it has at least one bent portion formed in a portion located between a connection portion connected to the pressure vessel and an opening formed in the relief pipe among the relief pipes. Two or more bent portions may be formed in the relief pipe. The relief pipe may extend in any manner from the connection portion, and may extend downward in the vertical direction from the connection portion. The opening may be formed at any location on the relief pipe. The opening may be formed on the side surface of the relief pipe instead of at the tip of the relief pipe. The connection portion of the relief pipe may be connected to any location on the pressure vessel. The connection portion of the relief pipe may be connected to a portion of the cylindrical member of the pressure vessel that is located above the partition member, or may be connected to the upper lid member of the pressure vessel. The relief pipe may be an integrally formed pipe, or may be a pipe configured by connecting two or more pipes.

[0088] The shape of the thrombolytic agent is not particularly limited. The relative position of the thrombolytic agent with respect to the pressure vessel is not particularly limited. The thrombolytic agent may be located vertically above the upper end of the pressure vessel. The thrombolytic agent may be located vertically below the upper end of the cylindrical member of the pressure vessel. The thrombolytic agent may be fixed to the relief pipe in any manner. The pressure vessel may have any structure and may be other than an accumulator. The pressure vessel may be connected to the discharge side of the compressor. The pressure vessel may be arranged at any position within the housing of the outdoor unit.

[0089] The refrigeration cycle device provided with the outdoor unit of the present disclosure may be a device that utilizes a refrigeration cycle in which a refrigerant circulates, and is not limited to an air conditioner. The refrigeration cycle device may be a heat pump water heater or the like.

[0090] The relative positional relationships and dimensions of each part described in the above embodiments are examples, and the relative positional relationships and dimensions of each part in the present disclosure are not particularly limited as long as they are within the scope of the technical idea of the present disclosure. As described above, each configuration and each method described in this specification can be appropriately combined within a range that does not conflict with each other.

Description of Reference Numerals

[0091] 10... Outdoor unit, 12... Compressor, 18a... First pipe, 18b... Second pipe, 20... Indoor unit, 30... Pressure vessel, 31... Container part, 31a... Cylindrical member, 31b... Upper lid member, 32... Partition member, 40... Mounting member, 50... Relief pipe, 50a... Radial extension part, 50b... Vertical extension part, 50e... Large diameter part, 50g... Small diameter part, 50h... Enlarged diameter part, 50i... Connection part, 50s... Opening part, 51... Bending part, 52... Flare nut, 52c... Female screw part, 52d... Support part, 53... Elastic member, 54... Binding band, 60... Thrombolytic agent, 61a... Male screw part, 100... Refrigeration cycle device, Z... Vertical direction

Claims

1. An outdoor unit of a refrigeration cycle apparatus, comprising: a compressor; a pressure vessel connected to the compressor; a relief pipe connected to the pressure vessel; a thrombolytic agent that closes an opening formed in the relief pipe; and the relief pipe has a connection portion connected to the pressure vessel, at least one bent portion formed in a portion of the relief pipe located between the connection portion and the opening, a vertically extending portion extending in the vertical direction; and the pressure vessel has a cylindrical member extending in the vertical direction, an upper lid member attached to an upper end of the cylindrical member in the vertical direction; and the thrombolytic agent is attached to an upper end of the vertically extending portion in the vertical direction and is located above an upper end of the cylindrical member in the vertical direction, the outdoor unit.

2. The outdoor unit according to claim 1, further comprising a flare nut for fixing the thrombolytic agent to the relief pipe, wherein the vertically extending portion has a large-diameter portion, a small-diameter portion located above the large-diameter portion in the vertical direction and having an outer diameter smaller than that of the large-diameter portion, and a diameter-expanding portion formed at an upper end of the small-diameter portion in the vertical direction and having an outer diameter increasing as it goes upward in the vertical direction; and the diameter-expanding portion is located inside the flare nut, a male thread portion is formed on an outer peripheral surface of the thrombolytic agent, on an inner peripheral surface of the flare nut, a female thread portion that meshes with the male thread portion, and a support portion that supports the diameter-expanding portion from below in the vertical direction; are formed, the small-diameter portion passes through a lower end of the flare nut in the vertical direction, and an inner diameter at a lower end of the flare nut in the vertical direction is smaller than an outer diameter of the large-diameter portion.

3. The outdoor unit according to claim 2, further comprising a mounting member fixed to the pressure vessel, an elastic member attached to the small-diameter portion, and a binding band for fixing the small-diameter portion to the mounting member in a state where at least a part of the elastic member is sandwiched between the small-diameter portion and the mounting member.

4. The outdoor unit according to claim 1, further comprising a mounting member fixed to the pressure vessel, an elastic member attached to the vertically extending portion, and a binding band for fixing the vertically extending portion to the mounting member in a state where at least a part of the elastic member is sandwiched between the vertically extending portion and the mounting member.

5. The outdoor unit according to claim 3, wherein the mounting member is fixed to the upper lid member.

6. The pressure vessel is cylindrical and extends in the vertical direction. The relief pipe has a radially extending portion that extends in the radial direction of the pressure vessel. The radially extending portion has the connecting portion and protrudes outward in the radial direction from the pressure vessel. The outdoor unit according to claim 1, wherein a lower end portion in the vertical direction of the vertically extending portion is connected to an outer end portion in the radial direction of the radially extending portion via the bent portion.

7. It includes a first pipe and a second pipe connected to the pressure vessel. The pressure vessel has a container portion, and a partition member that vertically partitions the inside of the container portion. and has One end of the first pipe and one end of the second pipe open to a portion inside the pressure vessel that is located above the partition member in the vertical direction. The outdoor unit according to claim 1, wherein the connecting portion is located below the partition member in the vertical direction.

8. The thrombolytic agent is located above the partition member in the vertical direction. The outdoor unit according to claim 7.

9. The outdoor unit according to claim 1, wherein the pressure vessel is connected to the suction side of the compressor.

10. An outdoor unit according to any one of claims 1 to 9, and an indoor unit, A refrigeration cycle device comprising.

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