WO2025070763A1 - Air handling unit - Google Patents

Abstract

There is a risk of an air flow leaking from a gap between a first heat exchanger and a second heat exchanger. This air handling unit comprises a first heat exchanger (41), a second heat exchanger (42), and a blower device. The first heat exchanger (41) has a plurality of first flat tubes, a first header (21a), and a second header (21b). The plurality of first flat tubes are arranged along a first direction (D1). The second heat exchanger (42) has a plurality of second flat tubes, a third header (21c), and a fourth header (21d). The plurality of second flat tubes are arranged along the first direction (D1). The air handling unit further comprises a side panel (60). The side panel (60) is attached to an end of the first heat exchanger (41) in the first direction (D1). The side panel (60) prevents an air flow generated by the blower device from leaking from the gap between the first heat exchanger (41) and the second heat exchanger (42).

Description

Air Handling Unit

Regarding air handling units.

As shown in Patent Document 1 (US Pat. No. 5,341,870), there is a technology in which side panels are attached to the heat exchanger to ensure efficient heat exchange and prevent the air flow passing through the heat exchanger from leaking out from anywhere other than the heat exchange section.

If the heat exchanger includes a first heat exchanger and a second heat exchanger, and the first heat exchanger is positioned to cover the second heat exchanger, there is a risk of air leaking from the gap between the first and second heat exchangers.

The air handling unit of the 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 a first section and a second section sandwiched between a first bend of less than 180 degrees. The plurality of first flat tubes are aligned along a first direction. The first heat transfer fin is provided between adjacent plurality of first flat tubes. The first header is attached to the ends of the plurality of first flat tubes on the first section side. The second header is attached to the ends of the plurality of first flat tubes on the second section side. 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 a third section and a fourth section sandwiched between a second bend of less than 180 degrees. The second flat tubes are arranged along the first direction. The second heat transfer fins are provided between adjacent second flat tubes. The third header is attached to the ends of the second flat tubes on the third section side. The fourth header is attached to the ends of the second flat tubes on the fourth section side. The blower generates an air flow passing through the first heat exchanger and the second heat exchanger. The first and second sections are arranged to cover the third and fourth sections, respectively. The air handling unit further includes a first member. The first member is attached to the end of the first heat exchanger in the first direction. The first member prevents the air flow generated by the blower from leaking from a gap between the first and second heat exchangers.

In the air handling unit of the first aspect, the first member prevents the air flow generated by the blower from leaking through the gap between the first heat exchanger and the second heat exchanger. As a result, the air handling unit can perform efficient heat exchange.

The air handling unit of the second aspect is the air handling unit of the first aspect, in which the width of the first part is smaller than the width of the first header in a direction perpendicular to the direction in which the first part extends when viewed from the first direction. The width of the third part is smaller than the width of the third header in a direction perpendicular to the direction in which the third part extends when viewed from the first direction.

The air handling unit of the third aspect is the air handling unit of the first or second aspect, in which the first member is a flat plate. A first recess is formed in a first surface of the first member on the side of the first heat exchanger. An end of the first heat exchanger in the first direction is inserted into the first recess.

The air handling unit of the third aspect can determine the position of the first heat exchanger and fix the first heat exchanger by inserting the end of the first heat exchanger in the first direction into the first recess. Furthermore, the air handling unit can more effectively prevent the air flow generated by the blower device from leaking through the gap between the first heat exchanger and the second heat exchanger.

The air handling unit of the fourth aspect is the air handling unit of the third aspect, in which the first member is attached to the end of the second heat exchanger in the first direction. A second recess is formed in the first surface of the first member. The end of the second heat exchanger in the first direction is inserted into the second recess.

The air handling unit of the fourth aspect can determine the position of the second heat exchanger and fix the second heat exchanger by inserting the end of the second heat exchanger in the first direction into the second recess. Furthermore, the air handling unit can more effectively prevent the air flow generated by the blower from leaking through the gap between the first heat exchanger and the second heat exchanger.

The air handling unit of a fifth aspect is the air handling unit of the first or second aspect, in which the first member is a flat plate. A first convex portion is formed on a first surface of the first member facing the first heat exchanger. The first convex portion conforms to the shape of the end portion of the first heat exchanger in the first direction. The first convex portion has a second convex portion and a third convex portion. The second convex portion conforms to the shape of the second heat exchanger side at the end portion of the first heat exchanger in the first direction. The third convex portion conforms to the shape of the opposite side to the second heat exchanger at the end portion of the first heat exchanger in the first direction.

The air handling unit of the fifth aspect can determine the position of the first heat exchanger and fix the first heat exchanger by inserting the end of the first direction of the first heat exchanger between the second convex portion and the third convex portion. Furthermore, the air handling unit can more effectively prevent the air flow generated by the blower device from leaking through the gap between the first heat exchanger and the second heat exchanger.

The air handling unit of a sixth aspect is the air handling unit of the fifth aspect, in which the first member is attached to the end of the second heat exchanger in the first direction. A fourth convex portion is formed on the first surface of the first member. The fourth convex portion conforms to the shape of the end of the second heat exchanger in the first direction. The fourth convex portion has a fifth convex portion and a sixth convex portion. The fifth convex portion conforms to the shape of the side opposite the first heat exchanger at the end of the second heat exchanger in the first direction. The sixth convex portion conforms to the shape of the first heat exchanger side at the end of the second heat exchanger in the first direction.

The air handling unit of the sixth aspect can determine the position of the second heat exchanger and fix the second heat exchanger by inserting the end of the second heat exchanger in the first direction between the fifth convex portion and the sixth convex portion. Furthermore, the air handling unit can more effectively prevent the air flow generated by the blower device from leaking through the gap between the first heat exchanger and the second heat exchanger.

The air handling unit of the seventh aspect is the air handling unit of any one of the first aspect to the sixth aspect, further comprising a second member. The second member is disposed in the gap between the first folded portion and the second folded portion. A third recess is formed in the first surface of the first member facing the first heat exchanger. The end of the second member in the first direction is inserted into the third recess.

The seventh aspect of the air handling unit is capable of determining the position of the second member and fixing the second member by inserting the end of the second member in the first direction into the third recess. The air handling unit can also prevent the air flow generated by the blower from leaking through the gap between the first bent portion and the second bent portion.

The air handling unit of an eighth aspect is the air handling unit of any one of the first aspect to the sixth aspect, further comprising a second member. The second member is disposed in the gap between the first folded portion and the second folded portion. A seventh convex portion is formed on the first surface of the first member on the side of the first heat exchanger. The seventh convex portion follows the shape of the end portion of the second member in the first direction.

The air handling unit of the eighth aspect can determine the position of the second member and fix the second member by inserting the end of the second member in the first direction into the space surrounded by the seventh convex portion. The air handling unit can also prevent the air flow generated by the blower from leaking through the gap between the first bent portion and the second bent portion.

The air handling unit of a ninth aspect is the air handling unit of any one of the first aspect to the eighth aspect, further comprising a first drain pan. The first drain pan receives condensation water from the first heat exchanger and the second heat exchanger. The first drain pan is disposed on the first header, the second header, the third header, and the fourth header side. The first drain pan has an opening. The opening allows the air flow generated by the blower to pass through.

The air handling unit of a tenth aspect is any of the air handling units of the ninth aspect, further comprising a second drain pan and a support member. The second drain pan receives condensation water from the first heat exchanger and the second heat exchanger. The support member connects the first member and the second drain pan. The first heat exchanger is fixed to the second drain pan by the first member and the support member.

The air handling unit of the tenth aspect is configured in this way, and can use the first member and the support member to fix the first heat exchanger to the second drain pan.

FIG. 2 is a side view of the air handling unit as viewed from a first direction. FIG. 4 is a side view of the air handling unit as viewed from a third direction. FIG. Fig. 4 is a side view of the heat exchanger as viewed from a first direction. Fig. 5 is a cross-sectional view of the drain pan. FIG. 4 is a top view of the heat exchanger seen from a second direction. FIG. 4 is a side view of the heat exchanger as viewed from a third direction. FIG. 4 is a diagram showing a first surface of the side panel on the heat exchanger side. FIG. This is a cross-sectional view taken along line AA in FIG. This is a cross-sectional view taken along the line B-B in FIG. FIG. FIG. 2 is a cross-sectional view of the drain pan as viewed from a first direction. FIG. FIG. 2 is a side view of the air handling unit as viewed from a first direction. FIG. 2 is a side view of the air handling unit as viewed from a first direction. FIG. 2 is a side view of the air handling unit as viewed from a first direction. FIG. 4 is a top view of the heat exchanger seen from a second direction. FIG. 13 is a diagram showing a first surface of a side panel on the heat exchanger side in modification 1D. This is a cross-sectional view taken along the line CC in FIG. This is a cross-sectional view taken along the line D-D in FIG.

(1) Overall structure of the air handling unit The air handling unit 100 comprises a casing 11, a support member 12, a heat exchanger 20, a blower 30, a drain pan 24 (first drain pan), a shielding member 50 (second member), and a side panel 60 (first member).

As shown in Figures 1 and 2, the air handling unit 100 is installed upright with the longitudinal direction of the casing 11 aligned vertically. The internal space of the casing 11 is divided by the support member 12 into a heat exchange chamber 17 and an air blowing chamber 18. A heat exchanger 20 is installed in the heat exchange chamber 17. A blower device 30 is installed in the air blowing chamber 18.

An intake port 13 is formed on the upper surface 11a of the casing 11. An exhaust port 14 is formed on the lower surface 11b of the casing 11. An intake duct 15 is connected to the intake port 13. An exhaust duct 16 is connected to the exhaust port 14. The intake port 13 is connected to the intake duct 15 and the heat exchange chamber 17. The exhaust port 14 is connected to the exhaust duct 16 and the blower chamber 18. The heat exchange chamber 17 is connected to the blower chamber 18.

The blower 30 generates an air flow that passes through the heat exchanger 20. The blower 30 has a centrifugal fan such as a sirocco fan, and a motor that drives the centrifugal fan. By driving the centrifugal fan, the blower 30 generates an air flow that flows from the intake 13 through the heat exchange chamber 17 and the blower chamber 18 toward the outlet 14. The air flows vertically downward through the internal space of the casing 11 from the intake 13 toward the outlet 14. As the air passes through the heat exchange chamber 17, it is heat exchanged by the heat exchanger 20. The air handling unit 100 draws in air from the intake 13, and blows out the air from the outlet 14 after having been heat exchanged by the heat exchanger 20 and having its temperature adjusted.

(2) Detailed Configuration of Air Handling Unit (2-1) Heat Exchanger The heat exchanger 20 has a first heat exchanger 41 and a second heat exchanger 42. The first heat exchanger 41 has 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 has 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) Multiple Flat Tubes As shown in FIGS. 1 to 6, the multiple first flat tubes 231 and the multiple second flat tubes 232 are arranged side by side along a predetermined direction. Hereinafter, the direction in which the multiple first flat tubes 231 are arranged and the direction in which the multiple second flat tubes 232 are arranged are referred to as the first direction D1. The first direction D1 is a horizontal direction. In FIGS. 3, 5 to 6, the multiple first flat tubes 231 and the multiple second flat tubes 232 located in the center in the first direction D1 are omitted. In addition, the direction in which air flows through the internal space of the casing 11 is referred to as the second direction D2. The second direction D2 is a vertical downward direction. In addition, the direction perpendicular to the first direction D1 and the second direction D2 is referred to as the third direction D3. The third direction D3 is a horizontal direction. The third direction D3 is the direction in which the drain pan 24 extends when viewed from the first direction D1. A refrigerant flows through each of the first flat tubes 231 and the second flat tubes 232, and exchanges heat with air passing through the heat exchange chamber 17. A first header 21a and a second header 21b are attached to both ends of the first flat tubes 231. A third header 21c and a fourth header 21d are attached to both ends of the second flat tubes 232.

As shown in FIG. 4, the heat exchanger 20 has a configuration in which the first heat exchanger 41 and the second heat exchanger 42 are arranged 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 viewed from the second direction D2, the position of the end of the first heat exchanger 41 in the first direction D1 is equal to the position of the end of the second heat exchanger 42 in the first direction D1. When viewed from the first direction D1, the first heat exchanger 41 is located outside the second heat exchanger 42. In other words, the upper end of the first heat exchanger 41 is located 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 the refrigerant piping 25.

Each of the first flat tubes 231 has one first portion 231a and one second portion 231b, sandwiched between one first bend portion 231c of less than 180 degrees. Each of the second flat tubes 232 has one third portion 232a and one fourth portion 232b, sandwiched between one second bend portion 232c of less than 180 degrees. The first portion 231a and the second portion 231b are arranged to cover the third portion 232a and the fourth portion 232b, respectively. As shown in Figures 4 to 6, the first portion 231a and the third portion 232a extend in a predetermined direction when viewed from the first direction D1. The second portion 231b and the fourth portion 232b extend in a predetermined direction different from the direction in which the first portion 231a and the third portion 232a extend, when viewed from the first direction D1. As shown in FIG. 4, the first bent portion 231c is bent so that the angle α between the direction in which the first portion 231a extends and the direction in which the second portion 231b extends is less than 180 degrees when viewed from the first direction D1. The first bent portion 231c may be bent so that the angle α is 90 degrees or less. The second bent portion 232c is bent so that the angle β between the direction in which the third portion 232a extends and the direction in which the fourth portion 232b extends is less than 180 degrees when viewed from the first direction D1. The second bent portion 232c may be bent so that the angle β is 90 degrees or less.

A first header 21a is attached to the end of the first part 231a side of the first flat tubes 231. A second header 21b is attached to the end of the second part 231b side of the first flat tubes 231. The first flat tubes 231 are arranged so that the first bent part 231c is located above the first header 21a and the second header 21b. Therefore, as shown in FIG. 4, the first flat tubes 231 have a V-shaped shape rotated 180° when viewed from the first direction D1. Similarly, a third header 21c is attached to the end of the third part 232a side of the second flat tubes 232. A fourth header 21d is attached to the end of the fourth part 232b side of the second flat tubes 232. The second flat tubes 232 are arranged so that the second bent portion 232c is located above the third header 21c and the fourth header 21d. Therefore, as shown in FIG. 4, the second flat tubes 232 have a V-shape rotated 180° when viewed from the first direction D1.

The first portion 231a, the second portion 231b, the third portion 232a, and the fourth portion 232b are flat multi-hole tubes having multiple passages through which the refrigerant passes. The multiple passages of the first portion 231a and the third portion 232a are arranged side by side along a direction perpendicular to the direction in which the first portion 231a and the third portion 232a extend when viewed from the first direction D1. The multiple passages of the second portion 231b and the fourth portion 232b are arranged side by side along a direction perpendicular to the direction in which the second portion 231b and the fourth portion 232b extend when viewed from the first direction D1. As shown in Figures 5 and 6, the first bent portion 231c is a flat multi-hole tube that is partially curved so as to connect the multiple passages of the first portion 231a and the multiple passages of the second portion 231b. The second bent portion 232c is a flat multi-hole tube that is partially curved to connect the multiple passages of the third portion 232a to the multiple passages of the fourth portion 232b.

The first portion 231a, the second portion 231b, the third portion 232a, and the fourth portion 232b are arranged so that the main surfaces are aligned with the second direction D2 and the third direction D3, as shown in Figures 4 to 6. The first portion 231a, the second portion 231b, the third portion 232a, and the fourth portion 232b are arranged at a predetermined interval along the first direction D1 that is perpendicular to the main surfaces.

(2-1-2) First heat transfer fin and second heat transfer fin The first heat transfer fin 261 promotes heat exchange between the refrigerant flowing inside the multiple 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 inside the multiple 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.

As shown in FIG. 4, the first heat transfer fin 261 is fixed to the first portion 231a and the second portion 231b between the first flat tubes 231 adjacent along the first direction D1. More specifically, the first heat transfer fin 261 is provided between the first portions 231a adjacent along the first direction D1. The first heat transfer fin 261 is fixed to the first portion 231a by fixing the peaks of the corrugations to the main surface of the first portion 231a. The first heat transfer fin 261 is also provided between the second portions 231b adjacent along the first direction D1. The first heat transfer fin 261 is fixed to the second portion 231b by fixing the peaks of the corrugations to the main surface of the second portion 231b. Similarly, the second heat transfer fin 262 is fixed to the third portion 232a and the fourth portion 232b between the second flat tubes 232 adjacent along the first direction D1. More specifically, the second heat transfer fin 262 is provided between the third portions 232a adjacent along the first direction D1. The second heat transfer fin 262 is fixed to the third portion 232a by fixing the peak of the corrugation to the main surface of the third portion 232a. The second heat transfer fin 262 is also provided between the fourth portions 232b adjacent along the first direction D1. The second heat transfer fin 262 is fixed to the fourth portion 232b by fixing the peak of the corrugation to the main surface of the fourth portion 232b.

(2-1-3) First Header, Second Header, Third Header, and Fourth Header The first header 21a and the second header 21b are attached to both ends of the first flat tubes 231. Specifically, the first header 21a is attached to the end of the first flat tubes 231 on the first portion 231a side. The second header 21b is attached to the end of the second flat tubes 231 on the second portion 231b side. The first header 21a and the second header 21b are arranged to extend in the first direction D1. Similarly, the third header 21c and the fourth header 21d are attached to both ends of the second flat tubes 232. Specifically, the third header 21c is attached to the end of the third portion 232a side of the second flat tubes 232. The fourth header 21d is attached to the end of the fourth portion 232b side of the second flat tubes 232.

The first header 21a, the second header 21b, the third header 21c, and the fourth header 21d are arranged to extend in the first direction D1. The first header 21a, the second header 21b, the third header 21c, and the fourth header 21d are arranged above 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 refrigerant piping 25.

As shown in FIG. 4, in a direction perpendicular to the direction in which the first portion 231a extends when viewed from the first direction D1, the width W1 of the first portion 231a is smaller than the width W2 of the first header 21a. The same is true for the second portion 231b and the second header 21b. In a direction perpendicular to the direction in which the third portion 232a extends when viewed from the first direction D1, the width W3 of the third portion 232a is smaller than the width W4 of the third header 21c. The same is true for the fourth portion 232b and the fourth header 21d. This creates a gap between the first heat exchanger 41 and the second heat exchanger 42.

(2-2) Shielding Member As shown 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 the gap between the first bent portion 231c and the second bent portion 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 As shown in Fig. 7, side panel 60 is a flat plate having a substantially triangular shape. Side panel 60 is made of, for example, resin. Air handling unit 100 has a pair of side panels 60. The pair of side panels 60 is attached to the ends of first heat exchanger 41 and second heat exchanger 42 in the first direction D1 so as to sandwich first heat exchanger 41 and second heat exchanger 42 along the first direction D1. Side panel 60 prevents the air flow generated by blower device 30 from leaking from a gap between first heat exchanger 41 and second heat exchanger 42.

As shown in FIG. 9, a first recess 91, a second recess 92, and a third recess 93 are formed on the first surface 61 of the side panel 60 on the side of the first heat exchanger 41 and the second heat exchanger 42. As shown in FIGS. 10 and 11, the end of the first heat exchanger 41 in the first direction D1 is inserted into the first recess 91. The end of the second heat exchanger 42 in the first direction D1 is inserted into the second recess 92. The end of the shielding member 50 in the first direction D1 is inserted into the third recess 93.

(2-4) Drain Pan The drain pan 24 is disposed on the side of the first header 21a, the second header 21b, the third header 21c, and the fourth header 21d. Specifically, the drain pan 24 is disposed below 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. 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 that is generated on the surfaces of the first flat tubes 231, the second flat tubes 232, the first header 21a, the second header 21b, the third header 21c, and the fourth header 21d due to heat exchange between the refrigerant flowing inside the first flat tubes 231 and the second flat tubes 232 and the air passing through the heat exchange chamber 17. The generated condensed water flows down the surfaces of the first flat tubes 231, the second flat tubes 232, the first header 21a, the second header 21b, the third header 21c, and the fourth header 21d due to its own weight, and is received in the drain pan 24. The drain pan 24 is fixed to the support member 12.

As shown in Figures 11 to 13, the drain pan 24 has a first wall 24a, a second wall 24b, a receiving portion 24c, and a drain outlet 24d. When viewed from the second direction D2, the drain pan 24 has a substantially rectangular shape.

The first wall 24a surrounds an opening 24f through which air flowing in the second direction D2 through the heat exchange chamber 17 passes. In other words, the drain pan 24 has an opening 24f through which the air flow generated by the blower 30 passes. The opening 24f is located in the center 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 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 blower chamber 18. The second wall 24b is located outside the first wall 24a when the drain pan 24 is viewed from the second direction D2.

The receiving portion 24c connects the lower end of the first wall 24a and the lower end of the second wall 24b. The receiving portion 24c corresponds to the bottom of the drain pan 24. The receiving portion 24c is disposed below the first header 21a, the second header 21b, the third header 21c, and the fourth header 21d. The space surrounded by the first wall 24a, the second wall 24b, and the receiving portion 24c is a space for receiving condensed water and temporarily storing it as drain water. The drain outlet 24d is formed in the second wall 24b. The drain outlet 24d is formed in 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 outlet 24d is a hole for discharging drain water to the outside of the drain pan 24.

As shown in FIG. 13, the receiving portion 24c has a first surface 24e, which is an upper surface that slopes downward from the first wall 24a to 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 surface 24e decreases from the center side where the first wall 24a is located to the outside where the second wall 24b is located. The first surface 24e corresponds to the bottom surface of the drain pan 24. The first surface 24e is the surface that comes into contact with the drain water.

The first surface 24e should be inclined at least between the first wall 24a extending along the first direction D1 and the second wall 24b extending along the first direction D1. In other words, at least the first surface 24e located below the first header 21a, the second header 21b, the third header 21c, and the fourth header 21d should be inclined downward in the third direction D3 from the first wall 24a toward the second wall 24b.

The receiving portion 24c has a protrusion 24j that protrudes from the first surface 24e, as shown in Figures 11 and 12. The protrusion 24j supports the first header 21a, the second header 21b, the third header 21c, and the fourth header 21d, as shown in Figure 4.

(3) Features (3-1)
2. Description of the Related Art In the past, in order to perform efficient heat exchange, there has been a technique for attaching a side panel to a heat exchanger to prevent the air flow passing through the heat exchanger from leaking from any place other than the heat exchange portion.

If the heat exchanger includes a first heat exchanger and a second heat exchanger, and the first heat exchanger is positioned to cover the second heat exchanger, there is a risk of air leaking from the gap between the first and second heat exchangers.

The air handling unit 100 of this embodiment includes a first heat exchanger 41, a second heat exchanger 42, and a blower 30. 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 plurality of first flat tubes 231 include a first portion 231a and a second portion 231b sandwiched between a first bend portion 231c of less than 180 degrees. The plurality of first flat tubes 231 are aligned along the first direction D1. The first heat transfer fin 261 is provided between the plurality of adjacent first flat tubes 231. The first header 21a is attached to the end of the plurality of first flat tubes 231 on the first portion 231a side. The second header 21b is attached to the end of the plurality of first flat tubes 231 on the second portion 231b side. The second heat exchanger 42 has a plurality of second flat tubes 232, a second heat transfer fin 262, a third header 21c, and a fourth header 21d. The plurality of second flat tubes 232 have a third portion 232a and a fourth portion 232b sandwiching a second bent portion 232c of less than 180 degrees. The plurality of second flat tubes 232 are arranged along the first direction D1. The second heat transfer fin 262 is provided between the plurality of adjacent second flat tubes 232. The third header 21c is attached to the end of the plurality of second flat tubes 232 on the third portion 232a side. The fourth header 21d is attached to the end of the plurality of second flat tubes 232 on the fourth portion 232b side. The blower device 30 generates a flow of air passing through the first heat exchanger 41 and the second heat exchanger 42. The first portion 231a and the second portion 231b are arranged to cover the third portion 232a and the fourth portion 232b, respectively. The air handling unit 100 further includes a side panel 60. The side panel 60 is attached to an end of the first heat exchanger 41 in the first direction D1. The side panel 60 prevents the air flow generated by the blower device 30 from leaking through a gap between the first heat exchanger 41 and the second heat exchanger 42.

In the air handling unit 100, the side panel 60 prevents the air flow generated by the blower 30 from leaking through the gap between the first heat exchanger 41 and the second heat exchanger 42. As a result, the air handling unit 100 can perform heat exchange efficiently.

(3-2)
In air handling unit 100, in a direction perpendicular to the direction in which first portion 231a extends as viewed from first direction D1, width W1 of first portion 231a is smaller than width W2 of first header 21a. In a direction perpendicular to the direction in which third portion 232a extends as viewed from first direction D1, width W3 of third portion 232a is smaller than width W4 of third header 21c.

(3-3)
In air handling unit 100, side panel 60 is a flat plate. A first recess 91 is formed in a first surface 61 of side panel 60 on the side of first heat exchanger 41. An end of first heat exchanger 41 in first direction D1 is inserted into first recess 91.

The air handling unit 100 can determine the position of the first heat exchanger 41 and fix the first heat exchanger 41 by inserting the end of the first heat exchanger 41 in the first direction D1 into the first recess 91. Furthermore, the air handling unit 100 can more effectively prevent the air flow generated by the blower device 30 from leaking through the gap between the first heat exchanger 41 and the second heat exchanger 42.

(3-4)
In air handling unit 100, side panel 60 is attached to an end of second heat exchanger 42 in first direction D1. A second recess 92 is formed in first surface 61 of side panel 60. The end of second heat exchanger 42 in first direction D1 is inserted into second recess 92.

The air handling unit 100 can determine the position of the second heat exchanger 42 and fix the second heat exchanger 42 by inserting the end of the second heat exchanger 42 in the first direction D1 into the second recess 92. Furthermore, the air handling unit 100 can more effectively prevent the air flow generated by the blower 30 from leaking through the gap between the first heat exchanger 41 and the second heat exchanger 42.

(3-5)
Air handling unit 100 further includes a shielding member 50. Shielding member 50 is disposed in the gap between first folded portion 231c and second folded portion 232c. A third recess 93 is formed in first surface 61 of side panel 60 on the first heat exchanger 41 side. An end of shielding member 50 in first direction D1 is inserted into third recess 93.

The air handling unit 100 can determine the position of the shielding member 50 and fix the shielding member 50 by inserting the end of the shielding member 50 in the first direction D1 into the third recess 93. The air handling unit 100 can also prevent the air flow generated by the blower 30 from leaking through the gap between the first bent portion 231c and the second bent portion 232c.

(3-6)
Air handling unit 100 further includes a drain pan 24. Drain pan 24 receives condensation water from first heat exchanger 41 and second heat exchanger 42. Drain pan 24 is disposed on the side of first header 21a, second header 21b, third header 21c, and fourth header 21d. Drain pan 24 has an opening 24f. Opening 24f allows the flow of air generated by blower 30 to pass through.

(4) Modifications (4-1) Modification 1A
Air handling unit 100 may be installed with the positions of heat exchange chamber 17 and blower chamber 18 interchanged. Air handling unit 101 shown in Fig. 14 is air handling unit 100 with the positions of heat exchange chamber 17 and blower chamber 18 interchanged. Air generated by blower device 30 flows vertically upward through the internal space of casing 11 from suction port 13 toward air outlet 14.

(4-2) Modification 1B
In this embodiment, air handling unit 100 is installed vertically so that the longitudinal direction of casing 11 is along the vertical direction. However, air handling unit 100 may be installed horizontally so that the longitudinal direction of casing 11 is along the horizontal direction. Air handling unit 102 shown in Fig. 15 is air handling unit 100 rotated by 90° when viewed from first direction D1. Air generated by blower 30 flows horizontally through the internal space of casing 11 from intake port 13 to exhaust port 14.

The air handling unit 102 further includes a second drain pan 27 and a support member 28. The second drain pan 27 is disposed below the heat exchanger 20. The second drain pan 27 receives condensation water that falls from the surfaces of the first heat exchanger 41 and the second heat exchanger 42 due to their own weight. The support member 28 connects the side panel 60 and 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 member 28.

As a result, the air handling unit 102 can secure the first heat exchanger 41 and the second heat exchanger 42 to the second drain pan 27 using the side panel 60 and the support member 28.

The air handling unit 102 may be installed with the positions of the heat exchange chamber 17 and the blower chamber 18 interchanged. The air handling unit 103 shown in FIG. 16 is an air handling unit 102 with the positions of the heat exchange chamber 17 and the blower chamber 18 interchanged. The air generated by the blower device 30 flows horizontally through the internal space of the casing 11 from the intake port 13 toward the exhaust port 14.

(4-3) Modification 1C
In this 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 shown 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 viewed from the second direction D2, the end of the second heat exchanger 42 in the first direction D1 is located inside the first heat exchanger 41.

In this case, for example, one set of side panels 60 is attached to the end of the first heat exchanger 41 in the first direction D1 so as to sandwich the first heat exchanger 41 along the first direction D1, and another set of side panels 80 is attached to the end of the second heat exchanger 42 in the first direction D1 so as to sandwich the second heat exchanger 42 along the first direction D1. A first recess 91 is formed in the first surface 61 of the side panel 60 on the first heat exchanger 41 side. A second recess 92 is formed in the first surface 81 of the side panel 80 on the second heat exchanger 42 side.

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 by a spacer. The spacer is attached to the end of the first heat exchanger 41 or the second heat exchanger 42 in the first direction D1. At this time, the side panel 60 or the side panel 80 is attached to the spacer.

(4-4) Modification 1D
In this embodiment, a first recess 91, a second recess 92, and a third recess 93 are formed on the first surface 61 of the side panel 60 facing the first heat exchanger 41 and the second heat exchanger 42. However, instead of the first recess 91, the second recess 92, and the third recess 93, a first convex portion 71, a fourth convex portion 74, and a seventh convex portion 77 may be formed on the first surface 61 of the side panel 60 facing the first heat exchanger 41 and the second heat exchanger 42, as shown in FIG.

As shown in FIG. 18, the first convex portion 71 conforms to the shape of the end of the first heat exchanger 41 in the first direction D1. The first convex portion 71 has 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 at the end of the first heat exchanger 41 in the first direction D1. The third convex portion 73 conforms to the shape of the opposite side to the second heat exchanger 42 at the end of the first heat exchanger 41 in the first direction D1. As shown in FIG. 19 and 20, the air handling unit 100 can determine the position of the first heat exchanger 41 and fix the first heat exchanger 41 by inserting the end of the first heat exchanger 41 in the first direction D1 between the second convex portion 72 and the third convex portion 73. Furthermore, the air handling unit 100 can more effectively prevent the air flow generated by the blower 30 from leaking through the gap between the first heat exchanger 41 and the second heat exchanger 42.

As shown in FIG. 18, the fourth convex portion 74 conforms to the shape of the end of the second heat exchanger 42 in the first direction D1. The fourth convex portion 74 has a fifth convex portion 75 and a sixth convex portion 76. The fifth convex portion 75 conforms to the shape of the end of the second heat exchanger 42 in the first direction D1 on the opposite side to the first heat exchanger 41. The sixth convex portion 76 conforms to the shape of the end of the second heat exchanger 42 in the first direction D1 on the first heat exchanger 41 side. As shown in FIG. 19 and 20, the air handling unit 100 can determine the position of the second heat exchanger 42 and fix the second heat exchanger 42 by inserting the end of the second heat exchanger 42 in the first direction D1 between the fifth convex portion 75 and the sixth convex portion 76. Furthermore, the air handling unit 100 can more effectively prevent the air flow generated by the blower 30 from leaking through the gap between the first heat exchanger 41 and the second heat exchanger 42.

As shown in FIG. 18, the seventh convex portion 77 conforms to the shape of the end portion of the shielding member 50 in the first direction D1. As shown in FIGS. 19 and 20, the air handling unit 100 can determine the position of the shielding member 50 and fix the shielding member 50 by inserting the end portion of the shielding member 50 in the first direction D1 into the space surrounded by the seventh convex portion 77. In addition, the air handling unit 100 can prevent the air flow generated by the blower 30 from leaking through the gap between the first bent portion 231c and the second bent portion 232c.

In addition, a seventh convex portion 77 may be formed instead of the third concave portion 93 on the first surface 61 of the side panel 60 on the side of the first heat exchanger 41 and the second heat exchanger 42, on which the first concave portion 91 and the second concave portion 92 are formed. Also, a third concave portion 93 may be formed instead of the seventh convex portion 77 on the first surface 61 of the side panel 60 on the side of the first heat exchanger 41 and the second heat exchanger 42, on which the first convex portion 71 and the fourth convex portion 74 are formed.

(4-5)
Although the embodiments of the present disclosure have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the present disclosure described in the claims.

21a to 21d First header to fourth header 24 Drain pan (first drain pan)
24f opening 27 second drain pan 28 support member 30 blower device 41, 42 first heat exchanger, second heat exchanger 50 shielding member (second member)
60 Side panel (first member)
61 First surface 71-77 First to seventh convex portions 91-93 First to third concave portions 100-103 Air handling unit 231, 232 Plurality of first flat tubes, Plurality of second flat tubes 231a, 231b First section, second section 231c, 232c First bent section, second bent section 232a, 232b Third section, fourth section 261, 262 First heat transfer fin, second heat transfer fin D1 First direction W1-W4 Width

U.S. Pat. No. 5,341,870

Claims (10)

a first heat exchanger (41) including: a plurality of first flat tubes (231) arranged along a first direction (D1), the first flat tubes (231) having a first portion (231a) and a second portion (231b) sandwiched between a first bend portion (231c) of less than 180 degrees; first heat transfer fins (261) provided between adjacent first flat tubes; a first header (21a) attached to ends of the first flat tubes on the first portion side; and a second header (21b) attached to ends of the first flat tubes on the second portion side;
a second heat exchanger (42) including: a plurality of second flat tubes (232) arranged along the first direction, the second flat tubes (232) having a third portion (232a) and a fourth portion (232b) sandwiched between a second bent portion (232c) of less than 180 degrees; second heat transfer fins (262) provided between adjacent second flat tubes; a third header (21c) attached to ends of the plurality of second flat tubes on the third portion side; and a fourth header (21d) attached to ends of the plurality of second flat tubes on the fourth portion side;
A blower (30) for generating an air flow passing through the first heat exchanger and the second heat exchanger;
Equipped with
the first portion and the second portion are disposed to cover the third portion and the fourth portion, respectively;
a first member (60) attached to an end of the first heat exchanger in the first direction and preventing the air flow generated by the blower device from leaking through a gap between the first heat exchanger and the second heat exchanger;
Further comprising:
Air handling unit (100-103). In a direction perpendicular to the direction in which the first portion extends when viewed from the first direction, the width (W1) of the first portion is smaller than the width (W2) of the first header,
In a direction perpendicular to the direction in which the third portion extends when viewed from the first direction, the width (W3) of the third portion is smaller than the width (W4) of the third header,
An air handling unit (100-103) according to claim 1. the first member is a flat plate,
A first recess (91) into which an end portion of the first heat exchanger in the first direction is inserted is formed on a first surface (61) of the first member on the first heat exchanger side.
An air handling unit (100-103) according to claim 1 or 2. The first member is attached to an end portion of the second heat exchanger in the first direction,
A second recess (92) into which an end portion of the second heat exchanger in the first direction is inserted is formed on the first surface of the first member.
4. The air handling unit of claim 3. the first member is a flat plate,
A first convex portion (71) is formed on a first surface (61) of the first member on the first heat exchanger side along the shape of an end portion of the first heat exchanger in the first direction,
The first convex portion has a second convex portion (72) that follows the shape of the second heat exchanger side at the end of the first heat exchanger in the first direction, and a third convex portion (73) that follows the shape of the opposite side to the second heat exchanger at the end of the first heat exchanger in the first direction.
An air handling unit (100-103) according to claim 1 or 2. The first member is attached to an end portion of the second heat exchanger in the first direction,
A fourth convex portion (74) is formed on the first surface of the first member along the shape of an end portion of the second heat exchanger in the first direction,
The fourth convex portion has a fifth convex portion (75) that follows the shape of the side opposite to the first heat exchanger at the end of the second heat exchanger in the first direction, and a sixth convex portion (76) that follows the shape of the first heat exchanger at the end of the second heat exchanger in the first direction.
6. An air handling unit according to claim 5. a second member (50) disposed in a gap between the first folded portion and the second folded portion;
Further equipped with
A third recess (93) into which an end portion of the second member in the first direction is inserted is formed on a first surface (61) of the first member on the first heat exchanger side.
An air handling unit (100-103) according to any one of the preceding claims. a second member (50) disposed in a gap between the first folded portion and the second folded portion;
Further equipped with
A seventh convex portion (77) is formed on a first surface (61) of the first member on the first heat exchanger side, the seventh convex portion (77) being aligned with the shape of an end portion of the second member in the first direction.
An air handling unit (100-103) according to any one of the preceding claims. a first drain pan (24) for receiving condensation water from the first heat exchanger and the second heat exchanger;
Further equipped with
The first drain pan comprises:
Located on the first header, the second header, the third header, and the fourth header side,
The air blower has an opening (24f) through which the air flow generated by the air blower passes.
An air handling unit (100-103) according to any one of the preceding claims. a second drain pan (27) for receiving condensed water from the first heat exchanger and the second heat exchanger;
A support member (28) that connects the first member and the second drain pan;
Further equipped with
The first heat exchanger is fixed to the second drain pan by the first member and the support member.
10. An air handling unit (102, 103) according to claim 9.

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