Refrigeration equipment

Abstract

To provide a refrigerator enabling a piping connection work to be performed easily.SOLUTION: The refrigerator includes: a heat exchanger exchanging heat between liquid and a refrigerant; a casing accommodating the heat exchanger; and liquid piping 33a in which the liquid flows. The liquid piping 33a has a connection part 41 having one end to which external piping 33b is connected, and the heat exchanger is connected to the other end of the liquid piping 33a. The connection part 41 has a screw part 41b into which end of the external piping 33b is screwed. All or part of the screw part 41b is disposed in the casing, and the screw part 41b is exposed to outside of the casing.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present disclosure relates to refrigeration devices. [Background technology]

[0002] Patent Document 1 discloses a heat pump water heater having a refrigerant circulation circuit and a hot water supply circuit. The refrigerant circulation circuit includes a compressor, a condensation heat exchanger, an evaporation heat exchanger, a refrigerant piping, etc., which are housed in the housing of the outdoor unit. The hot water supply circuit includes a hot water storage tank, a water circulation piping, and a water supply pump. The water circulation piping connects the hot water storage tank and the condensation heat exchanger, forming a water circulation path between them. The water supply pump circulates water between the hot water storage tank and the condensation heat exchanger via the water circulation piping.

[0003] The water circulation piping is divided into a portion provided on the outdoor unit side and a portion provided on the hot water tank side. The end of the water circulation piping provided on the outdoor unit side is provided with a connection port for connecting the water circulation piping on the hot water tank side. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2013-047591 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the heat pump hot water heater described in Patent Document 1, the connection port of the water circulation pipe protrudes from the housing of the outdoor unit. Therefore, a cover is required to cover the connection port. If such a cover exists, it is necessary to remove the cover to connect the water circulation pipe on the hot water tank side, which makes the pipe connection work complicated.

[0006] An object of the present disclosure is to provide a refrigeration apparatus that allows piping connection work to be easily performed. [Means for solving the problem]

[0007] (1) A refrigeration device according to the present disclosure comprises: a heat exchanger for exchanging heat between the liquid and the refrigerant; A liquid pipe through which the liquid flows; a housing that accommodates the heat exchanger and the liquid piping; Equipped with The liquid piping has a connection part to which an external piping is connected at one end, The heat exchanger is connected to the other end of the liquid piping, The connection portion has a threaded portion into which an end portion of the external pipe is screwed, The screw portion is entirely or partially disposed within the housing; The screw portion is exposed to the outside of the housing.

[0008] According to the above configuration, since the whole or part of the threaded portion of the connection part is disposed inside the housing, the projection of the connection part from the housing can be suppressed, making a cover unnecessary, and since the threaded portion is exposed to the outside of the housing, the external piping can be screwed into the threaded portion of the connection part from outside the housing to connect it. Therefore, the work of connecting the external piping can be easily performed.

[0009] (2) Preferably, the housing has a side panel, The side panel has an opening for exposing the threaded portion to the outside. According to this configuration, the threaded portion of the connection portion can be easily exposed to the outside of the housing.

[0010] (3) Preferably, a tip surface of the connection portion is located on the same plane as the outermost surface of the side panel, or is located on the inner side of the housing relative to the outer surface. According to this configuration, the entire connection portion can be configured not to protrude from the side panel of the housing.

[0011] (4) Preferably, the axis of the threaded portion is disposed parallel to a normal direction of the side panel. According to this configuration, when connecting the external piping to the connection portion, the external piping can be inserted into the threaded portion in a direction perpendicular to the side panel and then rotated, making it easier to connect the external piping.

[0012] (5) Preferably, the refrigeration apparatus includes a support frame fixed to the housing, The connection portion is supported by the support frame. According to this configuration, when connecting the external piping to the connection part, there is no need to support the connection part by hand, and the external piping can be easily connected from outside the housing.

[0013] (6) Preferably, the support frame includes a first frame member disposed adjacent to the connection portion and fixed to the housing, and a second frame member connecting the first frame member and the connection portion, The distance between the first frame member and the connection portion is smaller than the diameter of the threaded portion. According to this configuration, the distance between the first frame member and the connection portion can be shortened, and deformation of the second frame member due to the load when the external pipe is screwed into the connection portion can be suppressed.

[0014] (7) Preferably, the second frame member and the connection portion are joined by welding. According to this configuration, the second frame member and the connection portion can be firmly connected.

[0015] (8) Preferably, the refrigeration apparatus includes two of the liquid pipes arranged side by side, The support frame extends in the arrangement direction of the two liquid pipes. According to this configuration, the connection portion of the two liquid pipes can be supported by a common support frame.

[0016] (9) Preferably, the cooling device further comprises a connecting member that connects the support frame and the housing in a direction perpendicular to an arrangement direction of the two liquid pipes, and a refrigerant port that is used for charging or recovering a refrigerant, The refrigerant port is supported by the connecting member. With this configuration, the refrigerant port can be stably supported. [Brief description of the drawings]

[0017] [Figure 1] 1 is a schematic configuration diagram of a refrigeration device according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a perspective view of a heat source unit of the refrigeration device. [Diagram 3] FIG. 2 is a perspective view showing the inside of the heat source unit. [Figure 4] FIG. 2 is a schematic plan view showing the inside of the heat source unit. [Diagram 5] FIG. 4 is an enlarged perspective view showing the periphery of a connection portion of a water pipe. [Figure 6] FIG. 4 is a side view of the second heat exchanger and water piping. [Figure 7] 6 is a cross-sectional view of the support frame and the connection portion taken along line AA in FIG. 5. [Figure 8] 6 is a cross-sectional view of the connecting member taken along line BB in FIG. 5. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, embodiments of a refrigeration device will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram of a refrigeration device according to an embodiment of the present disclosure. The refrigeration device 10 of this embodiment is, for example, an air conditioner. The refrigeration device 10 has a heat source unit 11 and a load side unit 12. The heat source unit 11 is equipped with a refrigerant circuit 13 that performs a refrigeration cycle operation. This refrigerant circuit 13 cools or heats a liquid, such as water, as a heat medium used in the load side unit 12. The heat medium may be a liquid other than water, such as an antifreeze liquid (brine).

[0019] The refrigerant circuit 13 includes a compressor 21, a four-way switching valve 22, a first heat exchanger 23, a first expansion valve 24, a second expansion valve 25, a second heat exchanger 26, an accumulator 27, and refrigerant piping 28 that connects these components. A refrigerant serving as a heat medium flows through the refrigerant piping 28.

[0020] The compressor 21 draws in low-pressure gas refrigerant and discharges high-pressure gas refrigerant. The compressor 21 is equipped with a motor whose operating rotation speed can be adjusted by inverter control. The compressor 21 is a variable capacity type (variable capacity type) whose capacity (capacity) can be changed by inverter control of the motor. However, the compressor 21 may be a fixed capacity type.

[0021] The four-way switching valve 22 can reverse the flow of the refrigerant in the refrigerant pipe 28, and switch whether the refrigerant discharged from the compressor 21 is supplied to the first heat exchanger 23 or the second heat exchanger 26. This allows the heat source unit 11 to switch between cooling and heating the water used in the load side unit 12. The heat source unit 11 of this embodiment may only cool or only heat the water.

[0022] The first expansion valve 24 and the second expansion valve 25 are configured as electric expansion valves capable of adjusting the refrigerant flow rate. When the heat source unit 11 cools water, the first expansion valve 24 is fully open, and the opening degree of the second expansion valve 25 is controlled to adjust the refrigerant flow rate. When the heat source unit 11 heats water, the second expansion valve 25 is fully open, and the opening degree of the first expansion valve 24 is controlled to adjust the refrigerant flow rate.

[0023] The first heat exchanger 23 is configured, for example, by a cross fin tube type or a microchannel type heat exchanger. The first heat exchanger 23 functions as a refrigerant condenser (heat radiator) or an evaporator, and condenses or evaporates the refrigerant. The heat source unit 11 further includes a fan 29 that supplies outside air to the first heat exchanger 23.

[0024] The second heat exchanger 26 is configured, for example, by a plate-type heat exchanger. The second heat exchanger 26 includes a refrigerant flow path 26a and a water flow path (liquid flow path) 26b. The refrigerant pipe 28 of the refrigerant circuit 13 is connected to the refrigerant flow path 26a. The water flow path 26b is connected to water pipes (liquid pipes) 33, 34. The second heat exchanger 26 exchanges heat between the refrigerant flowing through the refrigerant flow path 26a and the water flowing through the water flow path 26b. The second heat exchanger 26 functions as a refrigerant condenser (heat radiator) or an evaporator, and condenses or evaporates the refrigerant.

[0025] The load side unit 12 is installed in a position where it can supply temperature-adjusted air to a space to be air-conditioned, such as a room, for example, in the ceiling. The load side unit 12 includes a third heat exchanger 31 and a fan 32. The third heat exchanger 31 is connected to the second heat exchanger 26 of the heat source unit 11 by water pipes 33, 34, and forms a water circuit 35 together with the second heat exchanger 26 and the water pipes 33, 34. The water pipes 33, 34 include a first water pipe 33 that allows water to flow from the third heat exchanger 31 to the second heat exchanger 26, and a second water pipe 34 that allows water to flow from the second heat exchanger 26 to the third heat exchanger 31. The water circuit 35 includes a flow control valve 36 and a pump 37 provided in the first water pipe 33.

[0026] The third heat exchanger 31 exchanges heat between the water (cold water or hot water) flowing from the second heat exchanger 26 through the second water piping 34 and the indoor air, and adjusts the indoor air to a desired temperature. After the heat exchange, the water flowing out of the third heat exchanger 31 returns to the second heat exchanger 26 through the first water piping 33. This water flow is generated by the pump 37. The flow control valve 36 adjusts the flow rate of the water flowing through the third heat exchanger 31. The fan 32 blows indoor air against the third heat exchanger 31, and supplies the air after heat exchange into the room.

[0027] The first water pipe 33 and the second water pipe 34 are divided into a portion 33a, 34a provided in the heat source unit 11 and other portions 33b, 34b. A connection portion 41 is provided at the tip of the portion 33a, 34a of the first water pipe 33 and the second water pipe 34. The other portions 33b, 34b of the first water pipe 33 and the second water pipe 34 are connected to this connection portion 41.

[0028] FIG. 2 is a perspective view of a heat source unit of a refrigeration device. FIG. 3 is a perspective view showing the inside of the heat source unit. FIG. 4 is a schematic plan view showing the inside of the heat source unit. In the following description, the descriptions of up, down, front, back, left, and right follow the arrows shown in the drawings. Specifically, for example, in FIG. 2 and FIG. 3, of the mutually orthogonal arrows X, Y, and Z, the direction indicated by the arrow X (first direction) is the left-right direction, the direction indicated by the arrow Y (second direction) is the front-back direction, and the direction indicated by the arrow Z (third direction) is the up-down direction. However, these descriptions are merely examples, and for example, the direction X may be read as the front-back direction, and the direction Y may be read as the left-right direction.

[0029] The heat source unit 11 has a housing 50. As shown in Fig. 3 and Fig. 4, the housing 50 accommodates the compressor 21, the four-way switching valve 22, the first heat exchanger 23, the second heat exchanger 26, the accumulator 27, etc., which constitute the above-mentioned refrigerant circuit 13, as well as a fan 29 and an electrical component box 30. The housing 50 is formed in a rectangular parallelepiped shape.

[0030] The housing 50 has a bottom plate 51, legs 52, pillars 53, and an upper frame 54. As shown in FIG. 4, the bottom plate 51 is formed in a rectangular shape in a plan view. In this embodiment, the direction along the long side of the bottom plate 51 is the left-right direction X. As shown in FIG. 2 and FIG. 3, legs 52 extending in the left-right direction X are provided on the lower surface of the front and rear long side portions of the bottom plate 51. The pillars 53 are provided at the four corners of the bottom plate 51. The pillars 53 extend upward from the bottom plate 51. The upper frame 54 connects the upper parts of the pillars 53 adjacent to each other in the front-rear and left-right directions.

[0031] As shown in Fig. 3, a fan 29 is attached to the upper frame 54. The fan 29 moves air from bottom to top. Two fans 29 are provided, aligned left and right. A bellmouth 44 is provided around each fan 29. As shown in Fig. 2, the fan 29 and the bellmouth 44 are covered on all four sides, front, back, left and right, by an upper panel 55. The fan 29 and the bellmouth 44 are covered from above by a mesh-like outlet grill 56.

[0032] Of the four side surfaces of the housing 50, a front side surface (front surface) is provided with a front panel (side panel) 58. The front panel 58 is provided over most of the front surface of the housing 50. An upper portion of the front panel 58 constitutes the above-mentioned upper panel 55. The front panel 58 may be formed of a single plate material, or may be formed of a combination of multiple plate materials.

[0033] As shown in FIG. 4, the compressor 21, the first heat exchanger 23, the second heat exchanger 26, the accumulator 27, the electrical equipment box 30, and the like are placed on a bottom plate 51 in the housing 50. The compressor 21 and the electrical equipment box 30 are arranged side by side in the approximate center in the left-right direction X on the front side of the housing 50. The second heat exchanger 26 and the accumulator 27 are arranged side by side in the left-right direction X at a position biased to the left side on the rear side of the housing 50. The first heat exchanger 23 is provided along the left side, rear side, right side, and part of the front side of the housing 50. The side surface of the housing 50 facing the first heat exchanger 23 is an intake port 60 that takes in air to be supplied to the first heat exchanger 23. The first heat exchanger 23 is not present in front of the compressor 21, the second heat exchanger 26, the accumulator 27, and the electrical equipment box 30, and a front panel 58 is provided.

[0034] The second heat exchanger 26 is connected to the parts 33a, 34a of the first and second water pipes 33, 34 described with reference to Fig. 1. Specifically, the parts 33a, 34a of the first and second water pipes 33, 34 (hereinafter also simply referred to as "water pipes 33a, 34a") extend in the front-rear direction Y, and their rear ends are connected to the front surface of the second heat exchanger 26. The front ends (tip ends) of the water pipes 33a, 34a are provided with the connection parts 41 described with reference to Fig. 1. The other parts 33b, 34b of the first and second water pipes 33, 34 shown in Fig. 1 are connected to this connection part 41. Hereinafter, the other parts 33b, 34b of the first and second water pipes 33, 34 are also referred to as "external pipes 33b, 34b".

[0035] The connection part 41 in this embodiment is a nut formed in a cylindrical shape with a female thread (threaded part) 41a formed on the inner circumferential surface (see FIG. 7). A heat insulating material 38 is wrapped around the outer circumferential surface of the water pipes 33a, 34a including the connection part 41. This heat insulating material 38 suppresses the influence of heat that is exerted by air that has passed through the first heat exchanger 23 inside the housing 50 on the water flowing through the water pipes 33a, 34a.

[0036] As shown in Figs. 2 and 4, the connection parts 41 of the water pipes 33a, 34a are arranged on the front panel 58 of the housing 50. The connection parts 41 are arranged inside an opening 58a formed in the front panel 58. The connection parts 41 and the internal threaded parts 41b (see Fig. 7) are exposed to the outside of the housing 50. Therefore, the external pipes 33b, 34b can be connected to the connection parts 41 from outside the housing 50. The two connection parts 41 are arranged side by side with an interval in the vertical direction Z. Water to be supplied to the second heat exchanger 26 flows into the upper connection part 41, and water that has passed through the second heat exchanger 26 is discharged from the lower connection part 41.

[0037] Fig. 5 is an enlarged perspective view showing the periphery of a connection portion of the water pipe, and Fig. 6 is a side view of the second heat exchanger and the water pipe. The connection part 41 is supported by a support frame 62. Specifically, the connection part 41 is restricted in movement in all directions and rotation around an axis C (see FIG. 7) by the support frame 62. The support frame 62 has a first frame member 63 and a second frame member 64. The first frame member 63 extends in the vertical direction Z. A lower end of the first frame member 63 is fixed to a stand 51a provided on the bottom plate 51 of the housing 50. An upper end of the first frame member 63 is fixed to a horizontal frame 65.

[0038] The horizontal frame 65 extends in the left-right direction X. A left end of the horizontal frame 65 is fixed to the support pillar 53 on the left front side of the housing 50. A right end of the horizontal frame 65 is fixed to the electrical component box 30. A midpoint of the first frame member 63 in the up-down direction Z and the support column 53 are connected by a connecting member 67. The connecting member 67 is a plate member extending in the left-right direction X.

[0039] The first frame member 63 of the support frame 62, the support columns 53, the bottom plate 51 of the housing 50, the horizontal frames 65, and the connecting members 67 form a frame structure 70 that is framed in a substantially rectangular shape.

[0040] As shown in Fig. 6, the upper water pipe 33a of the two water pipes 33a, 34a arranged vertically is bent in a Z-shape when viewed from the side. Therefore, the front end of the water pipe 33a where the connection part 41 is provided is disposed at a lower position than the rear end of the water pipe 33a connected to the second heat exchanger 26. Therefore, the connection parts 41 of the two water pipes 33a, 34a can be disposed close to each other in the vertical direction Z. The axis C of each connection part 41 is parallel to the normal direction (front-rear direction Y) of the front panel 58. The lower water pipe 34a is disposed at a higher position than the lower end of the first heat exchanger 23 as shown in Fig. 5.

[0041] 5, the first frame member 63 is disposed adjacent in the left-right direction X to two connection portions 41 aligned in the up-down direction Z. The first frame member 63 in this embodiment is disposed adjacent to the left side of the two connection portions 41. Therefore, the connection portions 41 are located between the first frame member 63 and the compressor 21 when viewed from the front. The first frame member 63 may be disposed adjacent to the right side of the connection portion 41.

[0042] 7 is a cross-sectional view of the support frame and the connection portion taken along line AA in FIG. As shown in Figs. 5 and 7, the second frame member 64 protrudes from the first frame member 63 in the left-right direction X toward each connection portion 41. The second frame member 64 is formed of a plate material. The second frame member 64 is arranged so that its plate surface is along the up-down direction Z. Therefore, the second frame member 64 has a structure that is stronger against loads in the up-down direction Z than against loads in the front-rear direction Y. The second frame member 64 has a bent portion 64a bent in a substantially Z-shape in plan view midway in the left-right direction X. This bent portion 64a increases the strength of the second frame member 64, particularly its strength against loads in the up-down direction Z.

[0043] The left end of the second frame member 64 is fixed to the first frame member 63 at two upper and lower points with fasteners 72 such as bolts and nuts. The right end of the second frame member 64 is joined to the outer circumferential surface of the connection portion 41 by welding. The second frame of this embodiment is joined to the connection portion 41 over a range equivalent to approximately half the circumference of the outer circumferential surface of the connection portion 41. As shown in Fig. 7, the distance L in the left-right direction X between the connection portion 41 and the first frame member 63 is smaller than the diameter D of the threaded portion 41b.

[0044] The left end of the second frame member 64 may be joined to the first frame member 63 by welding. The right end of the second frame member 64 may be fixed to a connection portion with fasteners such as bolts and nuts.

[0045] A front end surface (tip surface) 41a of the connection portion 41 is disposed on the same plane as the outer surface of the front panel 58 of the housing 50. Therefore, the connection portion 41 is exposed to the outside through the opening 58a without protruding from the front panel 58. The entire screw portion 41b is disposed inside the housing 50. The diameter of the opening 58a of the front panel 58 is larger than the outer shape of the connection portion 41. A gap occurring between the periphery of the opening 58a and the outer circumferential surface of the connection portion 41 is filled with the heat insulating material 38 wrapped around the outer circumferential surface of the connection portion 41.

[0046] When the outer surface of the front panel 58 is uneven, the front end surface 41a of the connection portion 41 may be disposed on the same plane as the outermost (front) portion of the outer surface of the front panel 58. The front end surface 41a of the connection portion 41 may be disposed rearward (inner side of the housing 50) of the outer surface of the front panel 58. Even in this case, the threaded portion 41b of the connection portion 41 is exposed to the outside of the housing 50 through the opening 58a of the front panel 58. Also in this case, a part or the entirety of the front end surface 41a of the connection portion 41 may be covered by the front panel 58.

[0047] The front end surface 41a of the connection portion 41 may protrude forward from the front panel 58 as long as a part of the threaded portion 41b is disposed within the housing 50. When the front end surface 41a of the connection portion 41 protrudes from the outer surface of the front panel 58, in order to suppress the amount of protrusion, it is preferable that 50% or more of the length of the threaded portion 41b in the direction of the axis C is disposed within the housing 50. It is more preferable that 80% or more of the length of the threaded portion 41b in the direction of the axis C is disposed within the housing 50.

[0048] As shown in Fig. 7, the other part 33b of the water pipe 33 is connected to the threaded part 41b of the connection part 41 as an external pipe. A male thread (threaded part) 33b1 is formed on the outer circumferential surface of the end part of this external pipe 33b, and this threaded part 33b1 is screwed into the threaded part 41b of the connection part 41. Since the connection part 41 is supported and prevented from rotating by the support frame 62, when the other part 33b of the water pipe 33 is screwed into the connection part 41, there is no need to support the connection part 41 by hand, and the connection work can be easily performed only by the action of rotating the external pipe 33b. Although not shown, the end part of the other part 34b of the water pipe 34 has a male thread (threaded part) formed thereon like the water pipe 33.

[0049] The second frame member 64 is disposed so that its plate surface is along the up-down direction Z and has a bent portion 64a midway in the left-right direction X, which makes it possible to suppress deformation of the second frame due to the load applied when the external pipes 33b, 34b are screwed into the connection portion 41. The first frame member 63 is disposed in the vicinity of the connection portion 41 to such an extent that the distance L from the connection portion 41 in the left-right direction X is smaller than the diameter D of the connection portion 41. Therefore, the length of the second frame member 64 in the left-right direction X can be shortened, making it possible to suppress deformation of the second frame member 64 due to the load applied when the external pipes 33b, 34b are screwed into the connection portion 41.

[0050] 8 is a cross-sectional view of the connecting member taken along line BB in FIG. A connecting member 67 is provided between the first frame member 63 of the support frame 62 and the support pillar 53 on the left front side of the housing 50. This connecting member 67 is formed of a plate material. The connecting member 67 is disposed so that its plate surface is along the up-down direction Z. The left end of the connecting member 67 is fixed to the support pillar 53 by a fastener 73 consisting of a bolt, a nut, etc. The right end of the connecting member 67 is fixed to the first frame member 63 by a fastener 74 consisting of a bolt and a nut.

[0051] A shutoff valve 75 is attached to the middle part of the connecting member 67 in the left-right direction X. This shutoff valve 75 is used to fill the refrigerant circuit 13 shown in FIG. 1 with refrigerant and to recover refrigerant from the refrigerant circuit 13. A refrigerant port 75a (see FIG. 5) for introducing and discharging refrigerant into and from the refrigerant circuit 13 is provided at the lower end part of the shutoff valve 75. Pipes or the like for filling or recovering the refrigerant are connected to this refrigerant port 75a. The shutoff valve 75 is disposed inside the housing 50, and is covered from the front by the front panel 58.

[0052] The connecting member 67, together with the first frame member 63, the support pillar 53, the horizontal frame 65, and the bottom plate 51, is one element that forms the frame structure 70, so that by attaching the shut-off valve 75 (refrigerant port 75a) to this connecting member 67, the shut-off valve 75 can be stably supported.

[0053] [Effects of the embodiment] (1) The refrigeration device 10 of the present disclosure includes a second heat exchanger 26 that exchanges heat between water (liquid) and a refrigerant, water pipes 33a, 34a through which water flows, and a housing 50 that houses the second heat exchanger 26 and the water pipes 33a, 34a. The water pipes 33a, 34a include a connection portion 41 to one end of which the external pipes 33b, 34b are connected, and the second heat exchanger 26 is connected to the other end of the water pipes 33a, 34a. The connection portion 41 has a threaded portion 41b into which the ends of the external pipes 33b, 34b are screwed, and the whole or a part of the threaded portion 41b is disposed within the housing 50, and the threaded portion 41b is exposed to the outside of the housing 50.

[0054] As described above, by disposing the whole or a part of the screw portion 41b inside the housing 50, the amount of protrusion of the connection portion 41 from the housing 50 can be reduced. Therefore, a cover covering the connection portion 41 can be omitted, and the size of the refrigeration device 10 (heat source unit 11) can be prevented from increasing and the appearance can be improved. In addition, since the amount of protrusion of the connection portion 41 from the housing 50 is reduced, packaging of the refrigeration device 10 (heat source unit 11) during transportation can be simplified. Since the screw portion 41b of the connection portion 41 is exposed to the outside of the housing 50, the external pipes 33b, 34b can be screwed into the screw portion 41b from the outside of the housing 50, and the connection work of the external pipes 33b, 34b can be easily performed.

[0055] (2) In the refrigeration apparatus 10 of the above embodiment, the housing 50 has a front panel (side panel) 58, and an opening 58a for exposing the threaded portion 41b to the outside is formed in the front panel 58. Therefore, the threaded portion 41b of the connection portion 41 can be easily exposed to the outside of the housing 50, and the external pipes 33b, 34b can be connected to the connection portion 41 without removing the front panel 58 from the housing 50.

[0056] (3) In the refrigeration apparatus 10 of the above embodiment, the tip surface 41a of the connection portion 41 is disposed on the same plane as the outermost surface of the front panel 58, or is disposed on the inner side of the housing 50 relative to the outer surface. Therefore, the entire connection portion 41 can be configured not to protrude from the front panel 58 of the housing 50.

[0057] (4) In the refrigeration apparatus 10 of the above embodiment, the axis C of the screw portion 41b is disposed parallel to the normal direction of the front panel 58. Therefore, when connecting the external pipes 33b, 34b to the connection portion 41, the external pipes 33b, 34b can be easily connected by simply inserting the external pipes 33b, 34b into the screw portion 41b in a direction perpendicular to the front panel 58 and rotating the external pipes 33b, 34b.

[0058] (5) The refrigeration apparatus 10 of the above embodiment includes a support frame 62 fixed to the housing 50, and the connection portion 41 is supported by the support frame 62. Therefore, when connecting the external pipes 33b, 34b to the connection portion 41, there is no need to support the connection portion 41 by hand, and the external pipes 33b, 34b can be easily connected from outside the housing 50.

[0059] (6) In the refrigeration apparatus 10 of the above embodiment, the support frame 62 includes a first frame member 63 disposed adjacent to the connection portion 41 and fixed to the housing 50, and a second frame member 64 connecting the first frame member 63 and the connection portion 41. The distance L between the first frame member 63 and the connection portion 41 is smaller than the diameter D of the threaded portion 41b. Therefore, the first frame member 63 can be disposed close to the connection portion 41, and the length of the second frame member 64 can be shortened. This makes it possible to suppress deformation of the second frame member 64 due to the load applied when the external pipes 33b, 34b are screwed into the connection portion 41.

[0060] (7) In the refrigeration apparatus 10 of the above embodiment, the second frame member 64 and the connection portion 41 are joined by welding. Therefore, the second frame member 64 and the connection portion 41 can be firmly connected to each other.

[0061] (8) The refrigeration device 10 of the above embodiment includes two water pipes 33a, 34a arranged side by side, and the support frame 62 extends in the direction in which the two water pipes 33a, 34a are arranged. Therefore, the two water pipes 33a, 34a can be supported by the common support frame 62.

[0062] (9) The refrigeration device 10 of the above embodiment includes a connecting member 67 that connects the support frame 62 and the housing 50 (the support columns 53) in a direction perpendicular to the arrangement direction of the two water pipes 33a, 34a, and the refrigerant port 75a used for charging or recovering the refrigerant is supported by the connecting member 67. Therefore, the refrigerant port 75a can be stably supported.

[0063] It should be noted that the present disclosure is not limited to the above examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0064] For example, the connection part of the water pipe is not limited to having a threaded part (female thread) on the inner circumferential surface, but may have a threaded part (male thread) on the outer circumferential surface. The connection parts of the two liquid pipes may be arranged side by side in the horizontal direction instead of in the vertical direction Z.

[0065] The refrigeration device 10 is not limited to an air conditioner, but may be a water heater or a cooling device for food, machine parts, or the like. [Explanation of symbols]

[0066] 10: Refrigeration equipment 11: Heat source unit 26:Second heat exchanger 33: First water pipe 33a: Part of the first water piping (liquid piping) 33b: Other parts of the first water piping (external piping) 33b1: Threaded part 34: Second water pipe 34a: Part of the second water piping (liquid piping) 34b: Other parts of the second water piping (external piping) 41: Connection part 41a: Tip surface 41b: Threaded part 50: Housing 53: Strut 58: Front panel (side panel) 58a:Aperture 62: Support frame 63: First frame member 64: Second frame member 67: Connecting member 75a: Refrigerant port C: Axial center L: distance

Claims

1. a heat exchanger (26) for exchanging heat between the liquid and a refrigerant; A liquid pipe (33a, 34a) through which the liquid flows; a housing (50) that houses the heat exchanger (26) and the liquid piping (33a, 34a); Equipped with The liquid pipe (33a, 34a) has a connection part (41) to which an external pipe (33b, 34b) is connected at one end, The heat exchanger (26) is connected to the other end of the liquid piping (33a, 34a), The connection portion (41) has a threaded portion (41b) into which an end of the external pipe (33b, 34b) is screwed, The entire screw portion (41b) is disposed within the housing (50); The screw portion (41b) is exposed to the outside of the housing (50), The housing further includes a support frame (62) fixed to the housing (50); The connection portion (41) is supported by the support frame (62) by being directly connected to the support frame (62); The housing (50) has a side panel (58); An opening (58a) is formed in the side panel (58) to expose the threaded portion (41b) to the outside, a tip surface (41a) of the connection portion (41) is disposed on the same plane as the outermost surface of the side panel (58) or is disposed on the inner side of the housing (50) relative to the outer surface; The connection portion (41) is a nut having the threaded portion (41b) formed on its inner peripheral surface, and the outer peripheral surface of the nut is fixed to the support frame (62).

2. a heat exchanger (26) for exchanging heat between the liquid and a refrigerant; A liquid pipe (33a, 34a) through which the liquid flows; a housing (50) that houses the heat exchanger (26) and the liquid piping (33a, 34a); Equipped with The liquid pipe (33a, 34a) has a connection part (41) to which an external pipe (33b, 34b) is connected at one end, The heat exchanger (26) is connected to the other end of the liquid piping (33a, 34a), The connection portion (41) has a threaded portion (41b) into which an end of the external pipe (33b, 34b) is screwed, The whole or a part of the screw portion (41b) is disposed within the housing (50); The screw portion (41b) is exposed to the outside of the housing (50), The housing further includes a support frame (62) fixed to the housing (50); The connection portion (41) is supported by the support frame (62) by being directly connected to the support frame (62); The support frame (62) includes a first frame member (63) disposed adjacent to the connection portion (41) and fixed to the housing (50), and a second frame member (64) connecting the first frame member (63) and the connection portion (41), A refrigeration apparatus, wherein a distance (L) between the first frame member (63) and the connection portion (41) is smaller than a diameter (D) of the threaded portion (41b).

3. a heat exchanger (26) for exchanging heat between the liquid and a refrigerant; A liquid pipe (33a, 34a) through which the liquid flows; a housing (50) that houses the heat exchanger (26) and the liquid piping (33a, 34a); Equipped with The liquid pipe (33a, 34a) has a connection part (41) to which an external pipe (33b, 34b) is connected at one end, The heat exchanger (26) is connected to the other end of the liquid piping (33a, 34a), The connection portion (41) has a threaded portion (41b) into which an end of the external pipe (33b, 34b) is screwed, The whole or a part of the screw portion (41b) is disposed within the housing (50); The screw portion (41b) is exposed to the outside of the housing (50), The housing further includes a support frame (62) fixed to the housing (50); The connection portion (41) is supported by the support frame (62) by being directly connected to the support frame (62); The two liquid pipes (33a, 34a) are arranged side by side, The support frame (62) extends in the arrangement direction of the two liquid pipes (33a, 34a), a connecting member (67) that connects the support frame (62) and the housing (50) in a direction perpendicular to an arrangement direction of the two liquid pipes (33a, 34a), and a refrigerant port (75a) that is used for charging or recovering the refrigerant, The refrigeration device, wherein the refrigerant port (75a) is supported by the connecting member (67).

4. 2. The refrigeration apparatus according to claim 1, wherein an axis (C) of the screw portion (41b) is arranged parallel to a normal direction of the side panel (58).

5. 3. The refrigeration apparatus according to claim 2, wherein the second frame member (64) and the connection portion (41) are joined by welding.

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