Air handling unit
By using a side panel and shielding member to seal gaps between heat exchangers, the air handling unit addresses air leakage issues, enhancing heat exchange efficiency.
Patent Information
- Authority / Receiving Office
- US · United States
- Patent Type
- Applications(United States)
- Current Assignee / Owner
- DAIKIN INDUSTRIES LTD
- Filing Date
- 2026-03-20
- Publication Date
- 2026-07-30
AI Technical Summary
Air leakage occurs between the gaps of first and second heat exchangers in existing air handling units, leading to inefficient heat exchange.
The air handling unit incorporates a side panel attached to the ends of first and second heat exchangers, along with a shielding member in the gaps between bent portions, to prevent air flow leakage and enhance heat exchange efficiency.
The solution effectively prevents air leakage, allowing for efficient heat exchange by ensuring the air flow remains confined within the designated heat exchange areas.
Smart Images
Figure US20260218939A1-D00000_ABST
Abstract
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a Continuation of PCT International Application No. PCT / JP2024 / 034758, filed on September 27, 2024, which claims priority under 35 U.S.C. § 119(a) to Patent Application No. JP 2023-170893, filed in Japan on September 29, 2023, all of which are hereby expressly incorporated by reference into the present application.TECHNICAL FIELD
[0002] The present invention relates to an air handling unit.BACKGROUND ART
[0003] As disclosed in PTL 1 (Specification of U.S. Patent No. 5341870), in order to efficiently exchange heat, there has been a technique in which side panels are attached to a heat exchanger to prevent an air flow that passes through the heat exchanger from leaking from a place other than a heat exchange portion.SUMMARY
[0004] An air handling unit of a first aspect includes a first heat exchanger, a second heat exchanger, and a blower. The first heat exchanger includes a plurality of first flat tubes, a first heat transfer fin, a first header, and a second header. The plurality of first flat tubes have first portions and second portions, with first bent portions of less than 180 degrees between the first portions and the second portions. The plurality of first flat tubes align along a first direction. The first heat transfer fin is provided between the plurality of first flat tubes adjacent to each other. The first header is attached to ends on the first portions side, of the plurality of first flat tubes. The second header is attached to ends on the second portions side, of the plurality of first flat tubes. The second heat exchanger includes a plurality of second flat tubes, a second heat transfer fin, a third header, and a fourth header. The plurality of second flat tubes have third portions and fourth portions, with second bent portions of less than 180 degrees between the third portions and the fourth portions. The plurality of second flat tubes align along the first direction. The second heat transfer fin is provided between the plurality of second flat tubes adjacent to each other. The third header is attached to ends on the third portions side, of the plurality of second flat tubes. The fourth header is attached to ends on the fourth portions side, of the plurality of second flat tubes. The blower is configured to generate an air flow that passes through the first heat exchanger and the second heat exchanger. The first portions and the second portions are arranged such that the first portions and the second portions cover the third portions and the fourth portions, respectively. The air handling unit further includes a first member. The first member is attached to an end in the first direction of the first heat exchanger. The first member is configured to prevent the air flow generated by the blower from leaking from a gap between the first heat exchanger and the second heat exchanger.BRIEF DESCRIPTION OF DRAWINGS
[0005] FIG. 1 is a side view of an air handling unit as viewed from a first direction.
[0006] FIG. 2 is a side view of the air handling unit as viewed from a third direction.
[0007] FIG. 3 is a perspective view of a heat exchanger.
[0008] FIG. 4 is a side view of the heat exchanger as viewed from the first direction. In FIG. 4, a cross-sectional view of a drain pan is illustrated.
[0009] FIG. 5 is a top view of the heat exchanger as viewed from a second direction.
[0010] FIG. 6 is a side view of the heat exchanger as viewed from the third direction.
[0011] FIG. 7 is a perspective view of the heat exchanger.
[0012] FIG. 8 is a view illustrating a first face, on the heat exchanger side, of a side panel.
[0013] FIG. 9 is a cross-sectional view taken along line A-A in FIG. 8.
[0014] FIG. 10 is a cross-sectional view taken along line B-B in FIG. 8.
[0015] FIG. 11 is a perspective view of the drain pan.
[0016] FIG. 12 is a top view of the drain pan.
[0017] FIG. 13 is a cross-sectional view of the drain pan as viewed from the first direction.
[0018] FIG. 14 is a side view of an air handling unit as viewed from the first direction.
[0019] FIG. 15 is a side view of an air handling unit as viewed from the first direction.
[0020] FIG. 16 is a side view of an air handling unit as viewed from the first direction.
[0021] FIG. 17 is a top view of a heat exchanger as viewed from the second direction.
[0022] FIG. 18 is a view illustrating a first face, on the heat exchanger side, of a side panel according to Modified Example 1D.
[0023] FIG. 19 is a cross-sectional view taken along line C-C in FIG. 18.
[0024] FIG. 20 is a cross-sectional view taken along line D-D in FIG. 18.DESCRIPTION OF EMBODIMENTSOverall Configuration of Air Handling Unit
[0025] An air handling unit 100 includes a casing 11, a support 12, a heat exchanger 20, a blower 30, a drain pan 24 (first drain pan), a shielding member 50 (second member), and side panel 60 (first member).
[0026] As illustrated in FIGS. 1 and 2, the air handling unit 100 is installed vertically such that the longitudinal direction of the casing 11 is along the vertical direction. The internal space of the casing 11 is partitioned into a heat exchange chamber 17 and a blow chamber 18 by the support 12. The heat exchanger 20 is installed in the heat exchange chamber 17. The blower 30 is installed in the blow chamber 18.
[0027] An intake port 13 is formed through a top face 11a of the casing 11. A blow-out port 14 is formed through a bottom face 11b of the casing 11. An intake duct 15 is connected to the intake port 13. A blow-out duct 16 is connected to the blow-out port 14. The intake port 13 is connected to the intake duct 15 and the heat exchange chamber 17. The blow-out port 14 is connected to the blow-out duct 16 and the blow chamber 18. The heat exchange chamber 17 communicates with the blow chamber 18.
[0028] The blower 30 generates an air flow that passes through the heat exchanger 20. The blower 30 includes a centrifugal fan, such as a Sirocco fan, and a motor for driving the centrifugal fan. The blower 30 drives the centrifugal fan to generate an air flow that flows from the intake port 13 toward the blow-out port 14 via the heat exchange chamber 17 and the blow chamber 18. The air flows vertically downward in the internal space of the casing 11 from the intake port 13 toward the blow-out port 14. The air is subjected to heat exchange by the heat exchanger 20 when the air passes through the heat exchange chamber 17. The air handling unit 100 sucks air from the intake port 13 and blows out, from the blow-out port 14, the air whose temperature has been adjusted by the heat exchange by the heat exchanger 20.2. Detailed Configuration of Air Handling Unit2-1 Heat Exchanger
[0029] The heat exchanger 20 includes a first heat exchanger 41 and a second heat exchanger 42. The first heat exchanger 41 includes a plurality of first flat tubes 231, a first heat transfer fin 261, a first header 21a, and a second header 21b. The second heat exchanger 42 includes a plurality of second flat tubes 232, a second heat transfer fin 262, a third header 21c, and a fourth header 21d. The first heat exchanger 41 and the second heat exchanger 42 constitute a part of a refrigerant circuit that performs a vapor compression refrigeration cycle.2-1-1 Plurality of Flat Tubes
[0030] As illustrated in FIGS. 1 to 6, the plurality of first flat tubes 231 and the plurality of second flat tubes 232 are arranged such that the tubes align along a predetermined direction. Hereinafter, the direction in which the plurality of first flat tubes 231 align and the direction in which the plurality of second flat tubes 232 align are referred to as a first direction D1. The first direction D1 is a horizontal direction. In FIGS. 3, 5, and 6, some of the plurality of first flat tubes 231 and some of the plurality of second flat tubes 232 located at a central portion with respect to the first direction D1 are omitted. A direction in which air flows through the internal space of the casing 11 is referred to as a second direction D2. The second direction D2 is a vertically downward direction. A direction orthogonal to the first direction D1 and the second direction D2 is referred to as a third direction D3. The third direction D3 is a horizontal direction. The third direction D3 is a direction in which the drain pan 24 extends when the drain pan 24 is viewed from the first direction D1. A refrigerant to exchange heat with air passing through the heat exchange chamber 17 flows through the inside of each of the plurality of first flat tubes 231 and the plurality of second flat tubes 232. The first header 21a and the second header 21b are attached to both ends of the plurality of first flat tubes 231. The third header 21c and the fourth header 21d are attached to both ends of the plurality of second flat tubes 232.
[0031] As illustrated in FIG. 4, the heat exchanger 20 has a configuration in which the first heat exchanger 41 and the second heat exchanger 42 are aligned along the second direction D2. The length of the first heat exchanger 41 along the first direction D1 is equal to the length of the second heat exchanger 42 along the first direction D1. When the first heat exchanger 41 and the second heat exchanger 42 are viewed from the second direction D2, the positions of the ends in the first direction D1 of the first heat exchanger 41 are the same as the positions of the ends in the first direction D1 of the second heat exchanger 42. When the first heat exchanger 41 and the second heat exchanger 42 are viewed from the first direction D1, the first heat exchanger 41 is positioned outside the second heat exchanger 42. In other words, the upper end of the first heat exchanger 41 is positioned higher than the upper end of the second heat exchanger 42. The first heat exchanger 41 is connected to the second heat exchanger 42 via a refrigerant pipe 25.
[0032] The plurality of first flat tubes 231 each have one first portion 231a and one second portion 231b, with one first bent portion 231c of less than 180 degrees between the first portion 231a and the second portion 231b. The plurality of second flat tubes 232 each have one third portion 232a and one fourth portion 232b, with one second bent portion 232c of less than 180 degrees between the third portion 232a and the fourth portion 232b. The first portions 231a and the second portions 231b are arranged such that the first portions 231a and the second portions 231b cover the third portions 232a and the fourth portions 232b, respectively. As illustrated in FIGS. 4 to 6, when the first portions 231a and the third portions 232a are viewed from the first direction D1, the first portions 231a and the third portions 232a extend in a predetermined direction. When the second portions 231b and the fourth portions 232b are viewed from the first direction D1, the second portions 231b and the fourth portions 232b extend in a predetermined direction different from the direction in which the first portions 231a and the third portions 232a extend. As illustrated in FIG. 4, the first bent portions 231c are bent such that when the first portions 231a and the second portions 231b are viewed from the first direction D1, an angle α between the direction in which the first portions 231a extend and the direction in which the second portions 231b extend is less than 180 degrees. The first bent portions 231c may be bent such that the angle α is 90 degrees or less. The second bent portions 232c are bent such that when the third portions 232a and the fourth portions 232b are viewed from the first direction D1, an angle β between the direction in which the third portions 232a extend and the direction in which the fourth portions 232b extend is less than 180 degrees. The second bent portions 232c may be bent such that the angle β is 90 degrees or less.
[0033] The first header 21a is attached to the ends on the first portion 231a side, of the plurality of first flat tubes 231. The second header 21b is attached to the ends on the second portion 231b side, of the plurality of first flat tubes 231. The plurality of first flat tubes 231 are disposed such that the first bent portions 231c are positioned above the first header 21a and the second header 21b. Therefore, as illustrated in FIG. 4, the plurality of first flat tubes 231 have a V-shape rotated by 180° when the plurality of first flat tubes 231 are viewed from the first direction D1. Similarly, the third header 21c is attached to the ends on the third portion 232a side, of the plurality of second flat tubes 232. The fourth header 21d is attached to the ends on the fourth portion 232b side, of the plurality of second flat tubes 232. The plurality of second flat tubes 232 are disposed such that the second bent portions 232c are positioned above the third header 21c and the fourth header 21d. Therefore, as illustrated in FIG. 4, the plurality of second flat tubes 232 have a V-shape rotated by 180° when the plurality of second flat tubes 232 are viewed from the first direction D1.
[0034] The first portions 231a, the second portions 231b, the third portions 232a, and the fourth portions 232b are flat multi-hole tubes having a plurality of passages through which the refrigerant passes. The plurality of passages of the first portions 231a and the third portions 232a are arranged such that the passages align along a direction orthogonal to the direction in which the first portions 231a and the third portions 232a extend when the first portions 231a and the third portions 232a are viewed from the first direction D1. The plurality of passages of the second portions 231b and the fourth portions 232b are arranged such that the passages align along a direction orthogonal to the direction in which the second portions 231b and the fourth portions 232b extend when the second portions 231b and the fourth portions 232b are viewed from the first direction D1. As illustrated in FIGS. 5 and 6, the first bent portions 231c are flat multi-hole tubes that are partially curved such that the plurality of passages of the first portions 231a and the plurality of passages of the second portions 231b communicate with each other. The second bent portions 232c are flat multi-hole tubes that are partially curved such that the plurality of passages of the third portions 232a and the plurality of passages of the fourth portions 232b communicate with each other.
[0035] As illustrated in FIGS. 4 to 6, the first portions 231a, the second portions 231b, the third portions 232a, and the fourth portions 232b are arranged such that the main surfaces thereof are along the second direction D2 and the third direction D3. The first portions 231a, the second portions 231b, the third portions 232a, and the fourth portions 232b are arranged at predetermined intervals along the first direction D1 orthogonal to the main surfaces thereof.2-1-2 First Heat Transfer Fin and Second Heat Transfer Fin
[0036] The first heat transfer fin 261 promotes heat exchange between the refrigerant flowing through the insides of the plurality of first flat tubes 231 and the air flow generated by the blower 30. The second heat transfer fin 262 promotes heat exchange between the refrigerant flowing through the insides of the plurality of second flat tubes 232 and the air flow generated by the blower 30. The first heat transfer fin 261 and the second heat transfer fin 262 are corrugated fins. The first heat transfer fin 261 and the second heat transfer fin 262 are made of aluminum or an aluminum alloy.
[0037] As illustrated in FIG. 4, the first heat transfer fin 261 is fixed to the first portions 231a and the second portions 231b between the plurality of first flat tubes 231 adjacent to each other along the first direction D1. More specifically, the first heat transfer fin 261 is provided between the first portions 231a adjacent to each other along the first direction D1. The first heat transfer fin 261 is fixed to the first portions 231a by fixing the apexes of the wave shapes thereof to the main surfaces of the first portions 231a. The first heat transfer fin 261 is also provided between the second portions 231b adjacent to each other along the first direction D1. The first heat transfer fin 261 is fixed to the second portions 231b by fixing the apexes of the wave shapes thereof to the main surfaces of the second portions 231b. Similarly, the second heat transfer fin 262 is fixed to the third portions 232a and the fourth portions 232b between the plurality of second flat tubes 232 adjacent to each other along the first direction D1. More specifically, the second heat transfer fin 262 is provided between the third portions 232a adjacent to each other along the first direction D1. The second heat transfer fin 262 is fixed to the third portions 232a by fixing the apexes of the wave shapes thereof to the main surfaces of the third portions 232a. The second heat transfer fin 262 is also provided between the fourth portions 232b adjacent to each other along the first direction D1. The second heat transfer fin 262 is fixed to the fourth portions 232b by fixing the apexes of the wave shapes thereof to the main surfaces of the fourth portions 232b.2-1-3 First Header, Second Header, Third Header, and Fourth Header
[0038] The first header 21a and the second header 21b are attached to both the ends of the plurality of first flat tubes 231. More specifically, the first header 21a is attached to the ends on the first portion 231a side, of the plurality of first flat tubes 231. The second header 21b is attached to the ends on the second portion 231b side, of the plurality of first flat tubes 231. The first header 21a and the second header 21b are disposed such that the first header 21a and the second header 21b extend in the first direction D1. Similarly, the third header 21c and the fourth header 21d are attached to both the ends of the plurality of second flat tubes 232. More specifically, the third header 21c is attached to the ends on the third portion 232a side, of the plurality of second flat tubes 232. The fourth header 21d is attached to the ends on the fourth portion 232b side, of the plurality of second flat tubes 232.
[0039] The first header 21a, the second header 21b, the third header 21c, and the fourth header 21d are arranged such that the headers extend in the first direction D1. The first header 21a, the second header 21b, the third header 21c, and the fourth header 21d are disposed over the drain pan 24. The first header 21a, the second header 21b, the third header 21c, and the fourth header 21d are connected to an external refrigerant circuit via the refrigerant pipe 25.
[0040] As illustrated in FIG. 4, the width W1 of the first portions 231a is smaller than the width W2 of the first header 21a with respect to a direction orthogonal to the direction in which the first portions 231a extend when the first portions 231a are viewed from the first direction D1. The same applies to the second portions 231b and the second header 21b. The width W3 of the third portions 232a is smaller than the width W4 of the third header 21c with respect to a direction orthogonal to the direction in which the third portions 232a extend when the third portions232a are viewed from the first direction D1. The same applies to the fourth portions 232b and the fourth header 21d. Thus, a gap is formed between the first heat exchanger 41 and the second heat exchanger 42.2-2 Shielding Member
[0041] As illustrated in FIG. 7, the shielding member 50 is a block-shaped member extending along the first direction D1. The shielding member 50 is made of, for example, resin. The shielding member 50 is disposed in a gap between the first bent portions 231c and the second bent portions 232c. The length of the shielding member 50 along the first direction D1 is equal to the lengths of the first heat exchanger 41 and the second heat exchanger 42 along the first direction D1.2-3 Side Panel
[0042] As illustrated in FIG. 7, the side panel 60 is flat plate having a substantially triangular shape. The side panel 60 is made of, for example, resin. The air handling unit 100 includes a pair of side panels 60. The pair of side panels 60 are attached to the ends in the first direction D1 of the first heat exchanger 41, and to the ends in the first direction D1 of the second heat exchanger 42 such that the side panels 60 sandwich the first heat exchanger 41 and the second heat exchanger 42 along the first direction D1. The side panel 60 prevents the air flow generated by the blower 30 from leaking from the gap between the first heat exchanger 41 and the second heat exchanger 42.
[0043] As illustrated in FIG. 9, a first concave portion 91, a second concave portion 92, and a third concave portion 93 are formed in a first face 61, which is on the first heat exchanger 41 and second heat exchanger 42 side, of the side panel 60. As illustrated in FIGS. 10 and 11, one of the ends in the first direction D1 of the first heat exchanger 41 is inserted into the first concave portion 91. One of the ends in the first direction D1 of the second heat exchanger 42 is inserted into the second concave portion 92. An end in the first direction D1 of the shielding member 50 is inserted into the third concave portion 93.2-4 Drain Pan
[0044] The drain pan 24 is disposed on the first header 21a, second header 21b, third header 21c, and fourth header 21d side. More specifically, the drain pan 24 is disposed under the first header 21a, the second header 21b, the third header 21c, and the fourth header 21d. The drain pan 24 receives condensed water from the first heat exchanger 41 and the second heat exchanger 42. More specifically, the drain pan 24 receives condensed water from the plurality of first flat tubes 231, the plurality of second flat tubes 232, the first header 21a, the second header 21b, the third header 21c, and the fourth header 21d. The condensed water is water generated on the surfaces of the plurality of first flat tubes 231, the plurality of second flat tubes 232, the first header 21a, the second header 21b, the third header 21c, and the fourth header 21d due to the heat exchange between the refrigerant flowing through the insides of the plurality of first flat tubes 231 and the plurality of second flat tubes 232 and the air passing through the heat exchange chamber 17. The generated condensed water flows down by its own weight along the surfaces of the plurality of first flat tubes 231, the plurality of second flat tubes 232, the first header 21a, the second header 21b, the third header 21c, and the fourth header 21d, and is received by the drain pan 24. The drain pan 24 is fixed to the support 12.
[0045] As illustrated in FIGS. 11 to 13, the drain pan 24 has a first wall 24a, a second wall 24b, a receiving portion 24c, and a drain port 24d. When the drain pan 24 is viewed from the second direction D2, the drain pan 24 has a substantially rectangular shape.
[0046] The first wall 24a surrounds an opening 24f through which the air that flows through the heat exchange chamber 17 in the second direction D2 passes. In other words, the drain pan 24 has the opening 24f through which the air flow generated by the blower 30 passes. The opening 24f is located at a central portion of the drain pan 24 when the drain pan 24 is viewed from the second direction D2. The opening 24f has a substantially rectangular shape when the opening 24f is viewed from the second direction D2. The air flowing through the heat exchange chamber 17 in the second direction D2 passes through the opening 24f and flows into the blow chamber 18. The second wall 24b is positioned outside the first wall 24a when the drain pan 24 is viewed from the second direction D2.
[0047] The receiving portion 24c connects a lower end of the first wall 24a and a lower end of the second wall 24b. The receiving portion 24c corresponds to a bottom portion of the drain pan 24. The receiving portion 24c is disposed under the first header 21a, the second header 21b, the third header 21c, and the fourth header 21d. A space surrounded by the first wall 24a, the second wall 24b, and the receiving portion 24c is a space for receiving the condensed water and temporarily storing the condensed water as drain water. The drain port 24d is formed through the second wall 24b. The drain port 24d is formed at a corner of the rectangular shape of the drain pan 24 when the drain pan 24 is viewed from the second direction D2. The drain port 24d is a hole for discharging the drain water to the outside of the drain pan 24.
[0048] As illustrated in FIG. 13, the receiving portion 24c has a first face 24e that is a top face inclined so as to be a slope descending from the first wall 24a toward the second wall 24b. In other words, when the drain pan 24 is viewed from the second direction D2, the receiving portion 24c has a portion where the height position of the first face 24e becomes lower from the center side where the first wall 24a is present toward the outer side where the second wall 24b is present. The first face 24e corresponds to a bottom face of the drain pan 24. The first face 24e is a face with which the drain water comes into contact.
[0049] The first face 24e may be inclined at least between the first wall24a extending along the first direction D1 and the second wall 24b extending along the first direction D1. In other words, at least the first face 24e positioned under the first header 21a, the second header 21b, the third header 21c, and the fourth header 21d may be inclined so as to be a slope descending from the first wall 24a toward the second wall 24b in the third direction D3.
[0050] As illustrated in FIGS. 11 and 12, the receiving portion 24c has protrusions 24j projecting from the first face 24e. As illustrated in FIG. 4, the protrusions 24j support the first header 21a, the second header 21b, the third header 21c, and the fourth header 21d.3. Features3-1
[0051] In the related art, in order to efficiently exchange heat, there has been a technique in which side panels are attached to a heat exchanger to prevent an air flow that passes through the heat exchanger from leaking from a place other than a heat exchange portion.
[0052] In a case where a heat exchanger includes a first heat exchanger and a second heat exchanger, and the first heat exchanger is arranged such that the first heat exchanger covers the second heat exchanger, an air flow may leak from a gap between the first heat exchanger and the second heat exchanger.
[0053] The air handling unit 100 of the present embodiment includes the first heat exchanger 41, the second heat exchanger 42, and the blower 30. The first heat exchanger 41 includes the plurality of first flat tubes 231, the first heat transfer fin 261, the first header 21a, and the second header 21b. The plurality of first flat tubes 231 have the first portions 231a and the second portions 231b, with the first bent portions 231c of less than 180 degrees between the first portions 231a and the second portions 231b. The plurality of first flat tubes 231 align along the first direction D1. The first heat transfer fin 261 is provided between the plurality of first flat tubes 231 adjacent to each other. The first header 21a is attached to the ends on the first portion 231a side, of the plurality of first flat tubes 231. The second header 21b is attached to the ends on the second portion 231b side, of the plurality of first flat tubes 231. The second heat exchanger 42 includes the plurality of second flat tubes 232, the second heat transfer fin 262, the third header 21c, and the fourth header 21d. The plurality of second flat tubes 232 have the third portions 232a and the fourth portions 232b, with the second bent portions 232c of less than 180 degrees between the third portions 232a and the fourth portions 232b. The plurality of second flat tubes 232 align along the first direction D1. The second heat transfer fin 262 is provided between the plurality of second flat tubes 232 adjacent to each other. The third header 21c is attached to the ends on the third portion 232a side, of the plurality of second flat tubes 232. The fourth header 21d is attached to the ends on the fourth portion 232b side, of the plurality of second flat tubes 232. The blower 30 generates an air flow that passes through the first heat exchanger 41 and the second heat exchanger 42. The first portions 231a and the second portions 231b are arranged such that the first portions 231a and the second portions 231b cover the third portions 232a and the fourth portions 232b, respectively. The air handling unit 100 further includes the side panel 60. The side panel 60 is attached to the end in the first direction D1 of the first heat exchanger 41. The side panel 60 prevents the air flow generated by the blower 30 from leaking from the gap between the first heat exchanger 41 and the second heat exchanger 42.
[0054] In the air handling unit 100, the side panel 60 prevents the air flow generated by the blower 30 from leaking from the gap between the first heat exchanger 41 and the second heat exchanger 42. As a result, the air handling unit 100 can efficiently exchange heat.3-2
[0055] In the air handling unit 100, the width W1 of the first portions 231a is smaller than the width W2 of the first header 21a with respect to the direction orthogonal to the direction in which the first portions 231a extend when the first portions 231a are viewed from the first direction D1. The width W3 of the third portions 232a is smaller than the width W4 of the third header 21c with respect to the direction orthogonal to the direction in which the third portions 232a extend when the third portions 232a are viewed from the first direction D1.3-3
[0056] In the air handling unit 100, the side panel 60 is flat plate. The first concave portion 91 is formed in the first face 61, which is on the first heat exchanger 41 side, of the side panel 60. The end in the first direction D1 of the first heat exchanger 41 is inserted into the first concave portion 91.
[0057] The air handling unit 100 allows the first heat exchanger 41 to be positioned and fixed by inserting the end in the first direction D1 of the first heat exchanger 41 into the first concave portion 91. The air handling unit 100 can also more effectively prevent the air flow generated by the blower 30 from leaking from the gap between the first heat exchanger 41 and the second heat exchanger 42.3-4
[0058] In the air handling unit 100, the side panel 60 is attached to the end in the first direction D1 of the second heat exchanger 42. The second concave portion 92 is formed in the first face 61 of the side panel 60. The end in the first direction D1 of the second heat exchanger 42 is inserted into the second concave portion 92.
[0059] The air handling unit 100 allows the second heat exchanger 42 to be positioned and fixed by inserting the end in the first direction D1 of the second heat exchanger 42 into the second concave portion 92. The air handling unit 100 can also more effectively prevent the air flow generated by the blower 30 from leaking from the gap between the first heat exchanger 41 and the second heat exchanger 42.3-5
[0060] The air handling unit 100 further includes the shielding member 50. The shielding member 50 is disposed in the gap between the first bent portions 231c and the second bent portions 232c. The third concave portion 93 is formed in the first face 61, which is on the first heat exchanger 41 side, of the side panel 60. An end in the first direction D1 of the shielding member 50 is inserted into the third concave portion 93.
[0061] The air handling unit 100 allows the shielding member 50 to be positioned and fixed by inserting the end in the first direction D1 of the shielding member 50 into the third concave portion 93. The air handling unit 100 can also prevent the air flow generated by the blower 30 from leaking from the gap between the first bent portions 231c and the second bent portions 232c.3-6
[0062] The air handling unit 100 further includes the drain pan 24. The drain pan 24 receives condensed water from the first heat exchanger 41 and the second heat exchanger 42. The drain pan 24 is disposed on the first header 21a, second header 21b, third header 21c, and fourth header 21d side. The drain pan 24 has the opening 24f. The air flow generated by the blower 30 passes through the opening 24f.4 Modified Examples4-1 Modified Example 1A
[0063] The air handling unit 100 may be installed with the positions of the heat exchange chamber 17 and the blow chamber 18 interchanged. An air handling unit 101 illustrated in FIG. 14 is the air handling unit 100 in which the positions of the heat exchange chamber 17 and the blow chamber 18 are interchanged. Air generated by a blower 30 flows vertically upward in the internal space of a casing 11 from an intake port 13 toward a blow-out port 14.4-2 Modified Example 1B
[0064] In the present embodiment, the air handling unit 100 is installed vertically such that the longitudinal direction of the casing 11 is along the vertical direction. However, the air handling unit 100 may be installed horizontally such that the longitudinal direction of the casing 11 is along the horizontal direction. An air handling unit 102 illustrated in FIG. 15 is the air handling unit 100 rotated by 90° when the air handling unit 102 is viewed from the first direction D1. Air generated by a blower 30 flows in the horizontal direction in the internal space of a casing 11 from an intake port 13 toward a blow-out port 14.
[0065] The air handling unit 102 further includes a second drain pan 27 and a support 28. The second drain pan 27 is disposed under a heat exchanger 20. The second drain pan 27 receives condensed water from the first heat exchanger 41 and the second heat exchanger 42. Specifically, the second drain pan 27 receives condensed water that has fallen due to its own weight from the surfaces of a first heat exchanger 41 and a second heat exchanger 42. The support 28 connects side panel 60 with the second drain pan 27. The first heat exchanger 41 and the second heat exchanger 42 are fixed to the second drain pan 27 by the side panel 60 and the support 28.
[0066] As a result, the air handling unit 102 can fix the first heat exchanger 41 and the second heat exchanger 42 to the second drain pan 27 by using the side panel 60 and the support 28.
[0067] The air handling unit 102 may be installed with the positions of a heat exchange chamber 17 and a blow chamber 18 interchanged. An air handling unit 103 illustrated in FIG. 16 is the air handling unit 102 in which the positions of the heat exchange chamber 17 and the blow chamber 18 are interchanged. Air generated by a blower 30 flows in the horizontal direction in the internal space of a casing 11 from an intake port 13 toward a blow-out port 14.4-3 Modified Example 1C
[0068] In the present embodiment, the length of the first heat exchanger 41 along the first direction D1 is equal to the length of the second heat exchanger 42 along the first direction D1. However, as illustrated in FIG. 17, the length of the first heat exchanger 41 along the first direction D1 may be longer than the length of the second heat exchanger 42 along the first direction D1. When the first heat exchanger 41 and the second heat exchanger 42 are viewed from the second direction D2, the ends in the first direction D1 of the second heat exchanger 42 are positioned inside the first heat exchanger 41.
[0069] At this time, for example, a pair of side panels 60 are attached to the ends in the first direction D1 of the first heat exchanger 41 such that the side panels 60 sandwich the first heat exchanger 41 along the first direction D1, and another pair of side panels 80 are attached to the ends in the first direction D1 of the second heat exchanger 42 such that the side panels 80 sandwich the second heat exchanger 42 along the first direction D1. A first concave portion 91 is formed in a first face 61, which is on the first heat exchanger 41 side, of the side panel 60. A second concave portion 92 is formed in a first face 81, which is on the second heat exchanger 42 side, of the side panel 80.
[0070] In some embodiments, the length of the first heat exchanger 41 along the first direction D1 or the length of the second heat exchanger 42 along the first direction D1 may be adjusted with a spacer. The spacer is attached to an end in the first direction D1 of the first heat exchanger 41 or of the second heat exchanger 42. At this time, the side panel 60 or the side panel 80 is attached to the spacer.4-4 Modified Example 1D
[0071] In the present embodiment, the first concave portion 91, the second concave portion 92, and the third concave portion 93 are formed in the first face 61, which is on the first heat exchanger 41 and second heat exchanger 42 side, of the side panel 60. However, instead of the first concave portion 91, the second concave portion 92, and the third concave portion 93, a first convex portion 71, a fourth convex portion 74, and a seventh convex portion 77 may be formed in the first face 61, which is on the first heat exchanger 41 and second heat exchanger 42 side, of the side panel 60, as illustrated in FIG. 18.
[0072] As illustrated in FIG. 18, the first convex portion 71 conforms to the shape of the end in the first direction D1 of the first heat exchanger 41. The first convex portion 71 includes a second convex portion 72 and a third convex portion 73. The second convex portion 72 conforms to the shape of the second heat exchanger 42 side of the end in the first direction D1 of the first heat exchanger 41. The third convex portion 73 conforms to the shape of the side opposite the second heat exchanger 42, of the end in the first direction D1 of the first heat exchanger 41. As illustrated in FIGS. 19 and 20, the air handling unit 100 allows the first heat exchanger 41 to be positioned and fixed by inserting the end in the first direction D1 of the first heat exchanger 41 between the second convex portion 72 and the third convex portion 73. The air handling unit 100 can also more effectively prevent the air flow generated by the blower 30 from leaking from the gap between the first heat exchanger 41 and the second heat exchanger 42.
[0073] As illustrated in FIG. 18, the fourth convex portion 74 conforms to the shape of the end in the first direction D1 of the second heat exchanger 42. The fourth convex portion 74 includes a fifth convex portion 75 and a sixth convex portion 76. The fifth convex portion 75 conforms to the shape of the side opposite the first heat exchanger 41, of the end in the first direction D1 of the second heat exchanger 42. The sixth convex portion 76 conforms to the shape of the first heat exchanger 41 side of the end in the first direction D1 of the second heat exchanger 42. As illustrated in FIGS. 19 and 20, the air handling unit 100 allows the second heat exchanger 42 to be positioned and fixed by inserting the end in the first direction D1 of the second heat exchanger 42 between the fifth convex portion 75 and the sixth convex portion 76. The air handling unit 100 can also more effectively prevent the air flow generated by the blower 30 from leaking from the gap between the first heat exchanger 41 and the second heat exchanger 42.
[0074] As illustrated in FIG. 18, the seventh convex portion 77 conforms to the shape of the end in the first direction D1 of the shielding member 50. As illustrated in FIGS. 19 and 20, the air handling unit 100 allows the shielding member 50 to be positioned and fixed by inserting the end in the first direction D1 of the shielding member 50 into space surrounded by the seventh convex portion 77. The air handling unit 100 can also prevent the air flow generated by the blower 30 from leaking from the gap between the first bent portions 231c and the second bent portions 232c.
[0075] Instead of the third concave portion 93, the seventh convex portion 77 may be formed in the first face 61, which is on the first heat exchanger 41 and second heat exchanger 42 side and in which the first concave portion 91 and the second concave portion 92 are formed, of the side panel 60. Instead of the seventh convex portion 77, the third concave portion 93 may be formed in the first face 61, which is on the first heat exchanger 41 and second heat exchanger 42 side and in which the first convex portion 71 and the fourth convex portion 74 are formed, of the side panel 60.4-5
[0076] Although embodiments of the present disclosure have been described above, it is to be understood that various changes in form and detail may be made therein without departing from the spirit and scope of the present disclosure as set forth in the appended claims.REFERENCE SIGNS LIST
[0077] 21a to 21d first header to fourth header
[0078] 24 drain pan (first drain pan)
[0079] 24f opening
[0080] 27 second drain pan
[0081] 28 support
[0082] 30 blower
[0083] 41, 42 first heat exchanger, second heat exchanger
[0084] 50 shielding member (second member)
[0085] 60 side panel (first member)
[0086] 61 first face
[0087] 71 to 77 first convex portion to seventh convex portion
[0088] 91 to 93 first concave portion to third concave portion
[0089] 100 to 103 air handling unit
[0090] 231, 232 plurality of first flat tubes, plurality of second flat tubes
[0091] 231a, 231b first portion, second portion
[0092] 231c, 232c first bent portion, second bent portion
[0093] 232a, 232b third portion, fourth portion
[0094] 261, 262 first heat transfer fin, second heat transfer fin
[0095] D1 first direction
[0096] W1 to W4 widthCITATION LISTPATENT LITERATURE
[0097] PTL 1: Specification of U.S. Patent No. 5341870
Claims
1. An air handling unit comprising:a first heat exchanger including:a plurality of first flat tubes that align along a first direction and have first portions and second portions, with first bent portions of less than 180 degrees between the first portions and the second portions;a first heat transfer fin provided between the plurality of first flat tubes adjacent to each other;a first header attached to ends on the first portions side, of the plurality of first flat tubes; anda second header attached to ends on the second portions side, of the plurality of first flat tubes;a second heat exchanger including:a plurality of second flat tubes that align along the first direction and have third portions and fourth portions, with second bent portions of less than 180 degrees between the third portions and the fourth portions;a second heat transfer fin provided between the plurality of second flat tubes adjacent to each other;a third header attached to ends on the third portions side, of the plurality of second flat tubes; anda fourth header attached to ends on the fourth portions side, of the plurality of second flat tubes; anda blower configured to generate an air flow that passes through the first heat exchanger and the second heat exchanger,wherein the first portions and the second portions are arranged such that the first portions and the second portions cover the third portions and the fourth portions, respectively, andthe air handling unit further comprises a first member attached to an end in the first direction of the first heat exchanger, and configured to prevent the air flow generated by the blower from leaking from a gap between the first heat exchanger and the second heat exchanger.
2. The air handling unit according to claim 1, wherein a width of the first portions is smaller than a width of the first header with respect to a direction orthogonal to a direction in which the first portions extend when the first portions are viewed from the first direction, anda width of the third portions is smaller than a width of the third header with respect to a direction orthogonal to a direction in which the third portions extend when the third portions are viewed from the first direction.
3. The air handling unit according to claim 1, wherein the first member is flat plate, anda first concave portion into which the end in the first direction of the first heat exchanger is inserted is formed in a first face, which is on the first heat exchanger side, of the first member.
4. The air handling unit according to claim 3, wherein the first member is attached to an end in the first direction of the second heat exchanger, anda second concave portion into which the end in the first direction of the second heat exchanger is inserted is formed in the first face of the first member.
5. The air handling unit according to claim 1, wherein the first member is flat plate,a first convex portion that conforms to a shape of the end in the first direction of the first heat exchanger is formed in a first face, which is on the first heat exchanger side, of the first member, andthe first convex portion includes a second convex portion that conforms to a shape of the second heat exchanger side of the end in the first direction of the first heat exchanger, and a third convex portion that conforms to a shape of a side opposite the second heat exchanger, of the end in the first direction of the first heat exchanger.
6. The air handling unit according to claim 5, wherein the first member is attached to an end in the first direction of the second heat exchanger,a fourth convex portion that conforms to a shape of the end in the first direction of the second heat exchanger is formed in the first face of the first member, andthe fourth convex portion includes a fifth convex portion that conforms to a shape of a side opposite the first heat exchanger, of the end in the first direction of the second heat exchanger, and a sixth convex portion that conforms to a shape of the first heat exchanger side of the end in the first direction of the second heat exchanger.
7. The air handling unit according to claim 1, further comprising:a second member disposed in a gap between the first bent portions and the second bent portions,wherein a third concave portion into which an end in the first direction of the second member is inserted is formed in a first face, which is on the first heat exchanger side, of the first member.
8. The air handling unit according to claim 1, further comprising:a second member disposed in a gap between the first bent portions and the second bent portions,wherein a seventh convex portion that conforms to a shape of an end in the first direction of the second member is formed in a first face, which is on the first heat exchanger side, of the first member.
9. The air handling unit according to claim 1, further comprising:a first drain pan configured to receive condensed water from the first heat exchanger and the second heat exchanger,wherein the first drain panis disposed on the first header, second header, third header, and fourth header side, andhas an opening through which the air flow generated by the blower passes.
10. The air handling unit according to claim 9, further comprising:a second drain pan configured to receive condensed water from the first heat exchanger and the second heat exchanger; anda support that connects the first member with the second drain pan,wherein the first heat exchanger is fixed to the second drain pan by the first member and the support.
11. The air handling unit according to claim 2, wherein the first member is flat plate, anda first concave portion into which the end in the first direction of the first heat exchanger is inserted is formed in a first face, which is on the first heat exchanger side, of the first member.
12. The air handling unit according to claim 2, wherein the first member is flat plate,a first convex portion that conforms to a shape of the end in the first direction of the first heat exchanger is formed in a first face, which is on the first heat exchanger side, of the first member, andthe first convex portion includes a second convex portion that conforms to a shape of the second heat exchanger side of the end in the first direction of the first heat exchanger, and a third convex portion that conforms to a shape of a side opposite the second heat exchanger, of the end in the first direction of the first heat exchanger.
13. The air handling unit according to claim 2, further comprising:a second member disposed in a gap between the first bent portions and the second bent portions,wherein a third concave portion into which an end in the first direction of the second member is inserted is formed in a first face, which is on the first heat exchanger side, of the first member.
14. The air handling unit according to claim 3, further comprising:a second member disposed in a gap between the first bent portions and the second bent portions,wherein a third concave portion into which an end in the first direction of the second member is inserted is formed in a first face, which is on the first heat exchanger side, of the first member.
15. The air handling unit according to claim 4, further comprising:a second member disposed in a gap between the first bent portions and the second bent portions,wherein a third concave portion into which an end in the first direction of the second member is inserted is formed in a first face, which is on the first heat exchanger side, of the first member.
16. The air handling unit according to claim 5, further comprising:a second member disposed in a gap between the first bent portions and the second bent portions,wherein a third concave portion into which an end in the first direction of the second member is inserted is formed in a first face, which is on the first heat exchanger side, of the first member.
17. The air handling unit according to claim 6, further comprising:a second member disposed in a gap between the first bent portions and the second bent portions,wherein a third concave portion into which an end in the first direction of the second member is inserted is formed in a first face, which is on the first heat exchanger side, of the first member.
18. The air handling unit according to claim 2, further comprising:a second member disposed in a gap between the first bent portions and the second bent portions,wherein a seventh convex portion that conforms to a shape of an end in the first direction of the second member is formed in a first face, which is on the first heat exchanger side, of the first member.
19. The air handling unit according to claim 3, further comprising:a second member disposed in a gap between the first bent portions and the second bent portions,wherein a seventh convex portion that conforms to a shape of an end in the first direction of the second member is formed in a first face, which is on the first heat exchanger side, of the first member.
20. The air handling unit according to claim 4, further comprising:a second member disposed in a gap between the first bent portions and the second bent portions,wherein a seventh convex portion that conforms to a shape of an end in the first direction of the second member is formed in a first face, which is on the first heat exchanger side, of the first member.