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JP-2026074697-A - Indoor unit of air conditioning system and air conditioning system

JP2026074697AJP 2026074697 AJP2026074697 AJP 2026074697AJP-2026074697-A

Abstract

[Problem] To provide an indoor unit of an air conditioning system and an air conditioning system that can improve the degree of freedom of connection to the other end when connecting the other ends of heat transfer tubes. [Solution] The indoor unit of the air conditioner comprises an indoor heat exchanger (40) including a plurality of fins (41) and a plurality of heat transfer tubes (42), and a first plate structure (50, 60) in which a first refrigerant passage (51, 61) is formed inside, at least one of a gas pipe (12a) and a liquid pipe (13a) is connected to one end (A) of the heat transfer tube (42), and the first refrigerant passage (51, 61) is connected to the other end (B) of the heat transfer tube (42), and the first refrigerant passage (51, 61) includes a first passage connected to a first other end and a second other end of the plurality of other ends (B), and a second passage connected to a third other end and a fourth other end of the plurality of other ends (B), wherein the distance between the first other end and the second other end is different from the distance between the third other end and the fourth other end. [Selection Diagram] Figure 4

Inventors

  • 吾郷 祥太

Assignees

  • ダイキン工業株式会社

Dates

Publication Date
20260507
Application Date
20241021

Claims (20)

  1. An indoor heat exchanger (40) including a plurality of fins (41) and a plurality of heat transfer tubes (42) attached to the plurality of fins (41), A first plate structure (50, 60) has a first refrigerant passage (51, 61) formed inside it, Equipped with, Each of the plurality of heat transfer tubes (42) includes one end (A) located on one side (Z1) of the arrangement direction (Z) of the plurality of fins (41) and the other end (B) located on the other side (Z2) of the arrangement direction (Z), At least one of the gas pipe (12a) and liquid pipe (13a) connecting the indoor heat exchanger (40) and the outdoor heat exchanger (22) is connected to the aforementioned end (A). The other end (B) is connected to the first refrigerant passage (51, 61) of the first plate structure (50, 60). The first refrigerant passage (51, 61) of the first plate structure (50, 60) includes a first passage connected to a first other end and a second other end of the plurality of other ends (B), and a second passage connected to a third other end and a fourth other end of the plurality of other ends (B), An indoor unit of an air conditioning system, wherein the distance between the first other end and the second other end is different from the distance between the third other end and the fourth other end.
  2. The indoor unit of the air conditioning system according to claim 1, wherein the distance between the first other end and the second other end is different from the distance between the third other end and the fourth other end, which indicates that the distance dimension (D1) between the first other end (B12) and the second other end (B13) is different from the distance dimension (D2) between the third other end (B22) and the fourth other end (B33).
  3. The indoor unit of the air conditioning system according to claim 1, wherein the distance between the first other end and the second other end is different from the distance between the third other end and the fourth other end, indicating that the alignment direction (Y1) of the first other end (B11) and the second other end (B21) is different from the alignment direction (Y2) of the third other end (B22) and the fourth other end (B14).
  4. An indoor unit of an air conditioning system according to any one of claims 1 to 3, comprising a diversion pipe (71) connecting the gas pipe (12a) or the liquid pipe (13a) to three or more of the aforementioned end ends (A14, A24, A34, A44), wherein the three or more aforementioned end ends (A14, A24, A34, A44) are adjacent to each other.
  5. The indoor unit of an air conditioning system according to any one of claims 1 to 3, wherein the first refrigerant passage (51, 61) of the first plate structure (50, 60) includes a third passage (51e) connecting the other end (B14) of a single heat transfer tube (42) to which the gas pipe (12a) or the liquid pipe (13a) is connected at one end (A), and a plurality of other ends (B21, B22) of the single heat transfer tube (42) other than the other end (B14).
  6. The indoor heat exchanger (40) includes a first heat exchange section (43a) and a second heat exchange section (43b) connected to the first heat exchange section (43a), and is bent at the point where the first heat exchange section (43a) and the second heat exchange section (43b) are connected. The indoor unit of an air conditioning system according to any one of claims 1 to 3, wherein the first refrigerant passage (51) of the first plate structure (50) includes a fourth passage (51j, 51k) connecting the other end (B51, B54) of the heat transfer tube (42) arranged in the first heat exchange section (43a) and the other end (B52, B53) of the heat transfer tube (42) arranged in the second heat exchange section (43b).
  7. The indoor unit of the air conditioning system according to claim 6, which does not include refrigerant piping connecting one end (A) of the heat transfer tube (42) located in the first heat exchange section (43a) and one end (A) of the heat transfer tube (42) located in the second heat exchange section (43b).
  8. The indoor unit of an air conditioning system according to any one of claims 1 to 3, wherein the first refrigerant passage (51, 61) of the first plate structure (50, 60) includes a fifth passage (51f) connecting the other ends (B11, B32) located at one or more stages apart in the heat exchange path.
  9. The system includes a refrigerant pipe (48) connecting the two ends (A) of the heat transfer tube (42), The indoor unit of the air conditioning system according to claim 8, wherein the refrigerant piping (48) does not connect the two ends (A) located at one or more stages apart in the heat exchange path.
  10. The indoor unit of an air conditioning system according to any one of claims 1 to 3, wherein the first refrigerant passage (51, 61) of the first plate structure (50, 60) includes a sixth passage (51g) that branches off and connects to three or more of the other ends (B31, B43, B44).
  11. The system includes a refrigerant pipe (73) connecting the two ends (A) of the heat transfer tube (42), The indoor unit of the air conditioning system according to claim 10, wherein the refrigerant piping (73) connects one end (A) of a single first heat transfer tube (42) to one end (A) of a single second heat transfer tube (42).
  12. The indoor unit of an air conditioning system according to any one of claims 1 to 3, wherein the first refrigerant passages (51, 61) of the first plate structure (50, 60) include seventh refrigerant passages (51h, 51, 51i) that intersect each other when viewed in the arrangement direction (Z).
  13. A first pipe (73) connecting the first end portions (A) together, It comprises a second pipe (73) connecting the two aforementioned end portions (A), The indoor unit of the air conditioning system according to claim 12, wherein the first pipe (73) and the second pipe (73) do not intersect when viewed in the arrangement direction (Z).
  14. It comprises a second plate structure (81, 82) in which a second refrigerant passage is formed inside, The indoor unit of an air conditioning system according to any one of claims 1 to 3, wherein the second refrigerant passage of the second plate structure (81, 82) is connected to the one end (A).
  15. The indoor unit of an air conditioning system according to any one of claims 1 to 3, wherein the first plate structure (50, 60) is brazed to the plurality of heat transfer tubes (42).
  16. The indoor unit of the air conditioning system according to any one of claims 1 to 3, wherein the heat transfer tube (42) is a flattened multi-perforated tube.
  17. The indoor unit of an air conditioning system according to any one of claims 1 to 3, wherein the first plate structure (50, 60) includes five or fewer stacked plate-shaped members.
  18. Each of the five or fewer plate-shaped members has a thickness of 3 mm or less, as described in claim 17, for the indoor unit of the air conditioning system.
  19. The system includes a tube sheet (49) that supports the other side (Z2) of the plurality of heat transfer tubes (42), The indoor unit of an air conditioning system according to any one of claims 1 to 3, wherein the distance between the tube sheet (49) and the first plate structure (50, 60) is 30 mm or less.
  20. An air conditioning system comprising an indoor unit as described in any one of claims 1 to 3.

Description

This disclosure relates to an indoor unit of an air conditioning system and an air conditioning system. Patent Document 1 discloses an air conditioning system. The air conditioning system described in Patent Document 1 includes a heat exchange section. The heat exchange section comprises heat transfer tubes, fins joined to the heat transfer tubes, a folded section, and a laminated header. A laminated header is connected to one end of the heat transfer tubes. Refrigerant piping (gas or liquid pipes) is connected to the laminated header. A folded section is connected to the other end of the heat transfer tubes. The folded section is formed in a substantially U-shape and connects the other ends of adjacent heat transfer tubes. International Publication Number 2017/042866 Figure 1 is a piping diagram of an air conditioning system according to an embodiment.Figure 2 is a front view of the indoor unit of the air conditioner.Figure 3 is a cross-sectional view of an indoor air conditioning unit.Figure 4 is a front view showing the internal structure of an indoor air conditioning unit.Figure 5 is a perspective view showing the connection section of the indoor heat exchanger.Figure 6 is a perspective view showing the plate structure.Figure 7 is a cross-sectional view of the plate structure.Figure 8A is a schematic diagram showing the other end of a heat transfer tube connected to a plate structure and a first example of a refrigerant passage connecting the other ends.Figure 8B is a schematic diagram showing the other end of a heat transfer tube connected to a plate structure and a second example of a refrigerant passage connecting the other ends.Figure 9 is a schematic diagram showing a configuration in which adjacent ends in the step direction are connected to each other.Figure 10 is a schematic diagram showing a configuration in which adjacent ends in the row direction are connected to each other.Figure 11 is a schematic diagram showing the other end of a heat transfer tube connected to a plate structure and a third example of a refrigerant passage connecting the other ends.Figure 12A is a schematic diagram showing an example of a configuration in which one end of a heat transfer tube is connected to the other.Figure 12B is a schematic diagram showing the other end of a heat transfer tube connected to a plate structure and a fourth example of a refrigerant passage connecting the other ends.Figure 13 is a schematic diagram showing the other end of a heat transfer tube connected to a plate structure and a fifth example of a refrigerant passage connecting the other ends.Figure 14 is a perspective view showing a modified example of the connection part.Figure 15 is a perspective view showing a modified example of a heat transfer tube.Figure 16 shows a modified example of the arrangement of multiple heat transfer tubes. The embodiments of this disclosure will be described in detail below with reference to the drawings. This disclosure is not limited to the embodiments shown below, and various modifications are possible without departing from the technical idea of this disclosure. Since the drawings are for conceptual illustration of this disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for ease of understanding. (1) Overall configuration of the air conditioning system This embodiment is an air conditioning system (10) equipped with a heat exchanger unit. The air conditioning system (10) adjusts the temperature of the air in the indoor space (I), which is the target space. As shown in Figure 1, the air conditioning system (10) is an example of a refrigeration cycle system equipped with a refrigerant circuit (11). The refrigerant circuit (11) is filled with refrigerant. The refrigerant circuit (11) performs the refrigeration cycle by circulating the refrigerant. The air conditioning system (10) comprises an outdoor unit (20), an indoor unit (30), a first connecting pipe (12), and a second connecting pipe (13). The air conditioning system (10) has one or more outdoor units (20) and one or more indoor units (30). In this embodiment, the air conditioning system (10) is a paired type having one outdoor unit (20) and one indoor unit (30). The first connecting pipe (12) is a gas connecting pipe, and the second connecting pipe (13) is a liquid connecting pipe. The outdoor unit (20) is installed outdoors. The outdoor unit (20) includes an outdoor casing (20a) and a compressor (21), an outdoor heat exchanger (22), an outdoor expansion valve (23), a four-way switching valve (24), and an outdoor fan (25), all housed within the outdoor casing (20a). The compressor (21) is a rotary compressor such as an oscillating piston type, rotary type, or scroll type. The outdoor heat exchanger (22) exchanges heat between the refrigerant and the outdoor air. The outdoor heat exchanger (22) is a fin-and-tube type. The outdoor expansion valve (23) reduces the pressure of the refrigerant. The outdoor expansion