WO2013161758A1

WO2013161758A1 - Cooling unit for heat exchanger

Info

Publication number: WO2013161758A1
Application number: PCT/JP2013/061779
Authority: WO
Inventors: 秀希吉田
Original assignee: カルソニックカンセイ株式会社
Priority date: 2012-04-26
Filing date: 2013-04-22
Publication date: 2013-10-31
Also published as: JP2013227938A

Abstract

The cooling unit of the present invention for injecting air toward a heat exchanger installed in a front part of a vehicle is provided with a blower and an air injection frame for injecting air supplied from the blower toward the heat exchanger, the air injection frame being installed in front of the heat exchanger. The air injection frame is provided with a side duct through which the air supplied from the blower is channeled, and a plurality of injection ducts arranged in the vertical direction in front of the heat exchanger and communicated at one end with the side duct. An ejector nozzle for injecting air diverted from the side duct toward the heat exchanger is formed in each of the injection ducts. This cooling unit makes it possible to pass air through the entire area of the heat exchanger and enhance the efficiency of heat exchange.

Description

Cooling unit for heat exchanger

The present invention relates to a cooling unit that blows air to a heat exchanger disposed in the front of a vehicle.

The vehicle's front-end module is equipped with a heat exchange unit. The heat exchange unit includes a heat exchanger composed of a radiator and a condenser, and a cooling unit including an electric fan and a fan motor disposed behind the heat exchanger (see Patent Document 1 below).

In the heat exchange unit disclosed in Patent Document 1, a shroud is provided between the heat exchanger and the electric fan. A pair of circular openings are formed in the shroud, and an electric fan is attached to each opening. When the electric fan is rotated, air is introduced from the front and flows backward through the heat exchanger and the electric fan. This air flow cools the refrigerant [refrigerant] and the cooling water [coolant] circulating in the heat exchanger.

Japanese Unexamined Patent Publication No. 2005-83321

However, in the above cooling unit, since the opening formed in the shroud is a circular shape that matches the shape of the fan, air passes through the outer part of the opening (particularly, the four corners of the heat exchanger). Hateful. For this reason, it has been desired to further improve the heat exchange efficiency by allowing air to pass through the entire heat exchanger.

An object of the present invention is to provide a cooling unit capable of improving the heat exchange efficiency by allowing air to pass through the entire heat exchanger.

A feature of the present invention is a cooling unit that blows out air toward a heat exchanger disposed in a front portion of a vehicle. The cooling unit is disposed in front of the blower and the heat exchanger, and is supplied from the blower. An air blowing frame that blows out toward the heat exchanger, and the air blowing frame is arranged in a vertical direction in front of the heat exchanger and a side duct into which air supplied from the blower flows. A plurality of outlet ducts, one end of which is communicated with the side ducts, and each of the outlet ducts ejects air distributed from the side ducts toward the heat exchanger. A cooling unit is provided in which a nozzle is formed.

According to the above feature, the air blown from the ejector nozzle passes through the heat exchanger while attracting the air in front of the blowing duct. The air blown out from the ejector nozzle passes through the entire heat exchanger together with the attracted air. For this reason, the refrigerant | coolant etc. in a heat exchanger are cooled efficiently, and the heat exchange efficiency of a heat exchanger improves.

Each of the plurality of blowing ducts is formed with at least one of an ejector nozzle that blows air upward toward the heat exchanger and an ejector nozzle that blows air downward toward the heat exchanger. preferable.

The plurality of blow-out ducts are arranged at the uppermost stage, an upper duct formed with an ejector nozzle for blowing air downward toward the heat exchanger, and arranged at the lowermost stage, toward the heat exchanger A lower duct in which an ejector nozzle that blows air upward is formed; and an ejector nozzle that is disposed between the upper duct and the lower duct and blows air upward toward the heat exchanger. And an intermediate duct in which an ejector nozzle that blows air downward is formed.

It is preferable that the blower and the air blowing frame are attached to a radiator core support of the vehicle to which the heat exchanger is fixed.

The side ducts are respectively provided at both ends of the plurality of blowing ducts, each of the plurality of blowing ducts is divided into two in the width direction by a dividing portion provided at the center, and the cooling unit is It is preferable that the apparatus further includes a fixing support member that fixes the divided portion to the radiator core support of the vehicle to which the heat exchanger is fixed. More preferably, the fixed support member is a hood lock stay.

Preferably, each of the plurality of blowing ducts has a teardrop-shaped cross section, and the curved portion of the teardrop-shaped cross section is disposed toward the front of the vehicle.

FIG. 1 is an exploded perspective view of a heat exchange unit including a cooling unit according to the first embodiment. FIG. 2 is a plan sectional view of the heat exchange unit. FIG. 3 is an enlarged plan sectional view of the heat exchange unit. FIG. 4 is a side sectional view of the heat exchange unit. 5A is a cross-sectional view taken along line VA-VA in FIG. 1, and FIG. 5B is a cross-sectional view taken along line VB-VB in FIG. FIG. 6 is an exploded perspective view of the heat exchange unit including the cooling unit according to the second embodiment. 7 is a cross-sectional view taken along line VII-VII in FIG. FIG. 8 is an exploded perspective view of the heat exchange unit including the cooling unit according to the third embodiment. 9 is a cross-sectional view taken along line IX-IX in FIG.

An embodiment of a cooling unit will be described with reference to the drawings. In the drawings, the same or equivalent components are denoted by the same reference numerals. In the drawings, dimensional ratios and the like may be different from actual ones. Accordingly, specific dimensions and the like should be determined in consideration of the following description. In addition, the dimensional ratio may differ between drawings.

The cooling unit 20 according to the first embodiment will be described with reference to FIGS. 1 to 5B. The heat exchange unit 1 including the cooling unit 20 of the present embodiment is mounted on a vehicle. In the following description, forward direction [forward direction] (FD), rear direction [rearward direction] (RD), width direction [width direction] (WD), upward direction [upward direction] (FD) UD) and a downward direction (DD) are defined (see FIG. 1). Similarly, the terms “front”, “back”, “side”, “upper”, and “lower” are used.

The heat exchange unit 1 is provided in the front end module of the vehicle. As shown in FIGS. 1 to 4, the heat exchange unit 1 includes a heat exchanger 10, a cooling unit 20, and a radiator core support 30.

The heat exchanger 10 includes a radiator 11 and a condenser 12 and is fixed to the radiator core support 30. In FIG. 4, the radiator 11 and the capacitor 12 are shown not on a cross section but on a side surface. The cooling unit 20 includes a pair of blowers 21 attached to both sides of the heat exchanger 10 and an air blowing frame 100 that blows air supplied by the blower 21 toward the heat exchanger 10. And. Each blower 21 sucks air in the vicinity of the radiator core support 30 and supplies the air into the air blowing frame 100. The air blowing frame 100 will be described later.

The radiator core support 30 is provided at the front of the vehicle. The radiator core support 30 is provided with a heat exchanger housing 31 for housing the heat exchanger 10. The heat exchanger accommodating portion 31 is formed with an opening 31A for allowing the air that has passed through the heat exchanger 10 to flow into the engine compartment. Side duct rear portions [side duct 部 rear housings] 32 forming side ducts (side ducts), which will be described later, of the air blowing frame 100 are provided on both sides of the heat exchanger accommodating portion 31, respectively.

A sealing protrusion [sealing rib] 32A (see FIG. 3) is formed on each opening end face of the side duct rear portion 32 over the entire circumference. Blower housings [blower housings] 33 for housing the blower 21 are provided on both side lower portions of the side duct rear portion 32 with a side wall [side wall] 35 interposed therebetween. Further, lamp housings 34 for housing the front lamp assembly are provided on both side upper portions of the side duct rear portion 32 with the side wall 35 interposed therebetween. On each side wall 35 between the side duct rear portion 32 and the blower accommodating portion 33, a vent opening [vent hole] 35A through which air from the blower 21 passes is formed.

The configuration of the air blowing frame 100 will be described with reference to the drawings.

As shown in FIGS. 1 to 3, the air blowing frame 100 is formed of a metal such as resin or aluminum, and is disposed in front of the heat exchanger 10. The air blowing frame 100 is attached to the radiator core support 30. The air blowing frame 100 includes a pair of side ducts 111 (see FIGS. 2 and 3) disposed on both sides, and a front of a heat exchange area of the heat exchanger 10 (tubes and fins of the radiator 11 and the condenser 12). The outlet ducts 120 are provided. Each side duct 111 includes a side duct rear part 32 and a side duct front part [side duct front housing] 110 attached to the front part of the side duct rear part 32. Each side duct 111 distributes air from the blower 21 to the blowout duct 120.

A plurality of attachment openings 112 to which the blowout duct 120 is attached are formed on the side wall 110A of each side duct front part 110 so as to protrude. In the present embodiment, the four attachment openings 112 are provided at equal intervals in the vertical direction. The outer periphery of the end of the blowing duct 120 is fitted inside each mounting opening 112. On each opening end face of the side duct front part 110, a sealing groove 113 (see FIG. 3) that fits with the sealing protrusion 32A is formed over the entire circumference. When the side duct front part 110 is attached to the side duct rear part 32, the sealing groove 113 and the sealing projection 32A are fitted, and air leakage from the side duct 111 is prevented.

Each blowing duct 120 (120A to 120D) blows air distributed from the side duct 111 to the heat exchanger 10. In this embodiment, the four blowing ducts 120 extend in parallel in the width direction, and are arranged at equal intervals in the vertical direction so as to cover the entire heat exchange area of the heat exchanger 10. That is, the four outlet ducts 120 are arranged in multiple stages in the vertical direction [aligned vertically in a multi louver manner].

Each blowout duct 120 is formed with one or two ejector nozzles 130 (131 to 134) for blowing air from the side duct 111 toward the heat exchanger 10 (see FIGS. 1 and 4). Specifically, the outlet duct 120 includes an upper duct 120A, a lower duct 120B, and two intermediate ducts 120C.

As shown in FIG. 4, the upper duct 120A is disposed at the uppermost stage, and an ejector nozzle 131 that blows air downward toward the heat exchanger is formed on the lower surface thereof. The front portion of the upper duct 120A is formed as a curved portion 121A, and the rear portion is formed as a tapered portion 122A that is thinned toward the heat exchanger 10, and the upper duct 120A has a tear. It has a drop-shaped cross-section. The teardrop-shaped cross section has a small profile drag against the air flow and hardly forms a vortex on the downstream side. That is, the upper duct 120A can smoothly pass the air flow. The ejector nozzle 131 of the upper duct 120A is formed as a slit by overlapping the rear end edge 121Ae of the curved portion 121A and the front end edge 122Ae of the tapered portion 122A. The front edge 122Ae is located inside the rear edge 121Ae, and air is blown out from the ejector nozzle 131 toward the rear (slightly below).

The lower duct 120B is disposed at the lowermost stage, and an ejector nozzle 132 is formed on the upper surface thereof. The front portion of the lower duct 120B is formed as a curved portion 121B, and the rear portion is formed as a tapered portion 122B. The lower duct 120B also has a teardrop-like cross section. That is, the lower duct 120B can also smoothly pass the air flow. The ejector nozzle 132 of the lower duct 120B is formed as a slit by overlapping the rear end edge 121Be of the curved portion 121B and the front end edge 122Be of the tapered portion 122B. The front edge 122Be is located inside the rear edge 121Be, and air is blown out from the ejector nozzle 132 toward the rear (slightly upward).

Each intermediate duct 120C is disposed between the upper duct 120A and the lower duct 120B, and an ejector nozzle 133 is formed on the upper surface thereof, and an ejector nozzle 134 is formed on the lower surface thereof. The front portion of each intermediate duct 120C is formed as a curved portion 121C, and the rear portion is formed as a tapered portion 122C. Each intermediate duct 120C also has a teardrop-like cross section. That is, the intermediate duct 120C can also smoothly pass the air flow. As shown in FIG. 5B, the bending portion 121C is fixed to a mounting base [attachment base] 123 provided at the front portion of the tapered portion 122C by a screw B. The mounting base 123 is provided at intervals along the width direction (see FIG. 1).

As shown in FIG. 5A, the ejector nozzle 133 on the upper surface is formed as a slit by overlapping the rear end edge 121Ce of the curved portion 121C and the front end edge 122Ce of the tapered portion 122C. The front edge 122Ce is located inside the rear edge 121Ce, and air is blown out from the ejector nozzle 133 toward the rear (slightly upward). The ejector nozzle 134 on the lower surface is also formed as a slit by overlapping the rear end edge 121Ce of the curved portion 121C and the front end edge 122Ce of the tapered portion 122C. The front edge 122Ce is located inside the rear edge 121Ce, and air is blown out from the ejector nozzle 134 toward the rear (slightly below).

The assembly of the heat exchange unit 1 described above will be described with reference to the drawings.

The blowing duct 120 is mounted between the mounting opening 112 of the one side duct front part 110 and the mounting opening 112 of the other side duct front part 110, and the main part of the air blowing frame 100 is pre-assembled.

Next, the heat exchanger 10, the blower 21, the main part of the pre-assembled air blowing frame 100, and the front lamp assembly are assembled to the radiator core support 30, and the heat exchange unit 1 is assembled. Specifically, the heat exchanger 10 is attached to the heat exchanger accommodating portion 31, the pair of side duct front portions 110 are fixed to the pair of side duct rear portions 32, and the blower 21 is attached to the blower accommodating portion 33. The front lamp assembly is attached to the lamp housing portion 34.

At this time, the sealing groove 113 of the side duct front part 110 is fitted to the sealing protrusion 32A of the side duct rear part 32, and the main part of the pre-assembled air blowing frame 100 is fixed to the radiator core support 30. The The air blowing frame 100 is disposed in front of the heat exchanger 10.

The air flowing through the heat exchange unit 1 will be described with reference to the drawings. When sufficient heat exchange is performed in the heat exchanger 10 by the air flow generated by the traveling of the vehicle, the blower 21 is not driven. Even in such a case, since the cooling unit 20 of the present embodiment does not have a fan or a shroud that provides ventilation resistance, the air flows very smoothly, and high heat exchange efficiency is realized. When the heat exchange at the radiator 11 is reduced because a sufficient air flow cannot be obtained due to traffic jams, or when the load on the air conditioner is increased and the heat exchange at the condenser 12 is promoted, the blower 21 is used. Driven.

When the blower 21 is driven, air is supplied from the blower 21 to the side duct 111. The air supplied to the side duct 111 is distributed at the mounting opening 112 and flows into the blowout duct 120 from both ends of the blowout duct 120. The flow rate (flow rate) can be controlled by adjusting the rotational speed of the blower 21.

The air flowing into the blowing duct 120 is blown out from the ejector nozzles 130 (131 to 134) toward the heat exchanger 10 (see FIG. 4). At this time, the air that has flowed into the blowing duct 120 is guided by the curved portion 121 (121A to 121C) and discharged from the ejector nozzle 130.

The air blown out from the ejector nozzle 130 passes through the heat exchanger 10 while drawing (drawing) air in front of the blowout duct 120 (sucking). The air blown out from the ejector nozzle 130 passes through the entire heat exchange area of the heat exchanger 10 together with the attracted air, and cools the refrigerant and cooling water in the heat exchanger 10 efficiently.

According to the present embodiment, the four outlet ducts 120 are arranged in the vertical direction in front of the heat exchanger 10 so as to cover the entire heat exchange area of the heat exchanger 10, and from the side duct 111. Air is blown out toward the heat exchanger 10 from the ejector nozzle 130 formed in the blowout duct 120. For this reason, the air blown out from the ejector nozzle 130 passes through the heat exchanger 10 while attracting the air in front of the blowout duct 120. That is, the air blown out from the ejector nozzle 130 passes through the entire heat exchange area of the heat exchanger 10 together with the attracted air. For this reason, the refrigerant | coolant and cooling water in the heat exchanger 10 are cooled efficiently, and the heat exchange efficiency of the heat exchanger 10 improves.

Further, in each blowing duct 120, an ejector nozzle 130 (132 and 133) that blows air upward toward the heat exchanger 10, and an ejector nozzle 130 (131 and 131) that blows air downward toward the heat exchanger 10. 134) is formed. For this reason, the air blown out from the ejector nozzle 130 is prevented from flowing to unnecessary portions and efficiently passes through all the heat exchange areas of the heat exchanger 10.

In addition, the blowout duct 120 is formed with an upper duct 120A in which an ejector nozzle 131 that blows air downward toward the heat exchanger 10 is formed and an ejector nozzle 132 that blows air upward toward the heat exchanger 10. A lower duct 120B and an intermediate duct 120C in which an ejector nozzle 133 that blows air upward toward the heat exchanger 10 and an ejector nozzle 134 that blows air downward toward the heat exchanger 10 are formed. For this reason, the air blown out from the ejector nozzle 130 is more reliably prevented from flowing to unnecessary portions, and more efficiently passes through all the heat exchange areas of the heat exchanger 10.

Further, the blower 21 and the air blowing frame 100 are attached to the radiator core support 30 to which the heat exchanger 10 is fixed. For this reason, it is not necessary to prepare the member for fixing the air blower 21 and the air blowing frame 100 separately. As a result, an increase in the vehicle weight can be prevented and the manufacturing cost of the heat exchange unit 1 can be reduced.

Further, the curved portion 121C of each intermediate duct 120C is fixed to the mounting base 123 of the tapered portion 122C with a screw B as shown in FIG. 5 (b). For this reason, the fixing strength (holding force) between the curved portion 121C and the tapered portion 122C can be increased, and the rigidity around the

ejector nozzles

133 and 134 can be improved. That is, vibrations in the vicinity of the

ejector nozzles

133 and 134 and abnormal noise due to vibration can be prevented, and air can be blown out stably.

Note that the curved portion 121A of the upper duct 120A and the curved portion 121B of the lower duct 120B may also be coupled to the mounting bases of the

tapered portions

122A and 122B via screws B. In this case, the fixing strength (holding force) between the

curved portions

121A and 121B and the

tapered portions

122A and 122B can be increased, and the rigidity around the

ejector nozzles

131 and 132 can be improved.

Next, the cooling unit 20 according to the second embodiment will be described with reference to FIGS. In this embodiment, the structure of the blowing duct 120 is different from that of the first embodiment described above. For this reason, about the structure which is the same as that of 1st Embodiment, or an equivalent structure, the same code | symbol is attached | subjected and those overlapping description is abbreviate | omitted.

In the present embodiment, the inside of each outlet duct 120 is divided into two in the width direction. Specifically, as shown in FIG. 6, each blowing duct 120 includes a dividing wall 125 that divides the inside into two at the center in the width direction. As shown in FIG. 7, screw holes 125 A are formed in the dividing wall 125. The screw B is screwed into the screw hole 125 A, and the fixed support member [fixing stay] 200 is fixed to the dividing wall 125 of the blowing duct 120.

Also, as the fixed support member 200, a hood lock stay that supports a hood / hood lock is used. The fixed support member 200 includes an attachment hole 201 corresponding to the attachment hole 37A of the attachment base 37 provided on the upper portion of the radiator core support 30, a plurality of screw holes 202 corresponding to the screw holes 125A of the dividing wall 125, and a radiator. An attachment hole 203 corresponding to the attachment hole 38 A of the attachment base 38 provided at the lower portion of the core support 30 is formed. The fixed support member 200 fixes the blowing duct 120 to the radiator core support 30 while supporting the blowing duct 120 at the center (partition wall 125) in the width direction of the blowing duct 120.

In the present embodiment, as in the first embodiment described above, the air blown out from the ejector nozzle 130 passes through all of the heat exchange area of the heat exchanger 10 together with the attracted air. For this reason, the refrigerant | coolant and cooling water in the heat exchanger 10 are cooled efficiently, and the heat exchange efficiency of the heat exchanger 10 improves.

Moreover, since the inside of each blowing duct 120 is divided into two in the width direction, there is no merging of air flow in each blowing duct 120, and the pressure distribution in each blowing duct 120 is stabilized. As a result, air is uniformly blown from the ejector nozzle 130, and the heat exchange efficiency of the heat exchanger 10 is further improved.

Furthermore, a hood lock stay is used as the fixed support member 200. Therefore, the air blowing frame 100 can be more firmly fixed to the radiator core support 30 without preparing a new member as the fixed support member 200, and the manufacturing cost can be reduced.

Next, the cooling unit 20 according to the third embodiment will be described with reference to FIGS. In the present embodiment, the configuration of the blowout duct 120 is different from the above-described first embodiment, and is similar to the above-described second embodiment. With respect to the same or equivalent configurations as those of the first and second embodiments, the same reference numerals are given and their overlapping descriptions are omitted.

In this embodiment, each blowing duct 120 is divided into two in the width direction. Specifically, as shown in FIG. 8, each blowing duct 120 is divided into a first duct 150 and a second duct 160 at the center in the width direction.

As shown in FIG. 9, an attachment surface [attachment tab] 152 protruding toward the second duct 160 is formed from the side wall 151 of the first duct 150. Similarly, an attachment surface 162 that protrudes toward the first duct 150 is formed from the side wall 161 of the second duct 160.

The

side walls

151 and 161 and the mounting

surfaces

152 and 162 constitute a dividing portion that divides the blowing duct 120 into two in the width direction. A screw hole 152A is formed in the mounting surface 152, and a screw hole 162A is formed in the mounting surface 162. In a state where the attachment surfaces 152 and 162 are overlapped, the screw B is screwed into the screw holes 152A and 162A, and the fixed support member 200 is fixed to the attachment surfaces 152 and 162. The fixed support member 200 fixes the blowout duct 120 to the radiator core support 30 while supporting the blowout duct 120 at the center in the width direction of the blowout duct 120 (the

side walls

151 and 161 and the attachment surfaces 152 and 162).

Moreover, since each blowing duct 120 is divided into two in the width direction, there is no merging of the air flow in each blowing duct 120 and the pressure distribution in each blowing duct 120 is the same as in the second embodiment described above. Stabilize. As a result, air is uniformly blown from the ejector nozzle 130, and the heat exchange efficiency of the heat exchanger 10 is further improved.

The present invention is not limited to the above-described embodiment, and can be appropriately modified within the scope of the invention. For example, the cooling unit 20 of the above embodiment includes a pair of blowers 21. However, only one blower 21 may be provided. In this case, the air blowing frame 100 includes one side duct 111 only on one side in the width direction. Air is supplied to one side duct 111 by one blower 21, and air is distributed from one side duct 111 to a plurality of outlet ducts 120 and blown out from the ejector nozzle 130. The blowout duct 120 is preferably not cantilevered, and the ends that are not connected to the side ducts 111 are preferably connected by a support plate or the like.

Moreover, in the said embodiment, after the side part duct front part 110 and the blowing duct 120 were formed as separate members, the blowing duct 120 was attached to the side duct front part 110. However, the side duct front part 110 and the outlet duct 120 may be integrally formed. Moreover, the shape of the blowing duct 120 is not limited to the shape of the said embodiment, What is necessary is just the shape which can blow off air toward the heat exchanger 10. FIG. However, a shape having a teardrop-like cross section, such as the blowout duct 120 of the above embodiment, is preferable because the air flow rate can be increased and the heat exchange efficiency can be improved. Moreover, the teardrop-like cross section having a curved portion in the front is preferable for attracting the front air by the air blown out from the emission nozzle 130.

In the above embodiment, the blowout duct 120 includes three types of ducts (upper duct 120A, lower duct 120B, and intermediate duct 120C). However, the blowout duct 120 only needs to include at least one type of the above three types of ducts. For example, the blowing duct 120 may include the upper duct 120A and the lower duct 120B, and may not include the intermediate duct 120C. However, in order to blow air uniformly over the entire heat exchange area of the heat exchanger 10 without increasing the air resistance, it is preferable to provide the four blowing ducts 120 as in the above embodiment.

Further, in the above embodiment, the upper duct 120A blows air downward toward the heat exchanger 10. However, the upper duct 120 A may blow air not only downward but also upward toward the heat exchanger 10. Similarly, the lower duct 120 B may blow air not only upward but also downward toward the heat exchanger 10. Each blowout duct 120 may be formed with at least one of an ejector nozzle 130 that blows air upward toward the heat exchanger 10 and an ejector nozzle 130 that blows air downward toward the heat exchanger 10.

Claims

A cooling unit that blows out air toward a heat exchanger disposed in the front of the vehicle,
A blower,
An air blowing frame that is disposed in front of the heat exchanger and blows air supplied from the blower toward the heat exchanger;
The air blowing frame includes a side duct into which air supplied from the blower flows and a plurality of blowing ducts arranged in parallel in the vertical direction in front of the heat exchanger and having one end communicated with the side duct. And,
A cooling unit in which an ejector nozzle that blows air distributed from the side duct toward the heat exchanger is formed in each of the blowing ducts.
The cooling unit according to claim 1,
At least one of an ejector nozzle that blows air upward toward the heat exchanger and an ejector nozzle that blows air downward toward the heat exchanger is formed in each of the plurality of blowing ducts. .
The cooling unit according to claim 1 or 2,
The plurality of blowing ducts are
An upper duct provided with an ejector nozzle that is arranged at the top and blows air downward toward the heat exchanger;
A lower duct provided with an ejector nozzle that is disposed at the bottom and blows air upward toward the heat exchanger;
An intermediate duct formed between the upper duct and the lower duct and formed with an ejector nozzle that blows air upward toward the heat exchanger and an ejector nozzle that blows air downward toward the heat exchanger And a cooling unit.
The cooling unit according to any one of claims 1 to 3,
The cooling unit, wherein the blower and the air blowing frame are attached to a radiator core support of the vehicle to which the heat exchanger is fixed.
The cooling unit according to any one of claims 1 to 4,
The side ducts are respectively provided at both ends of the plurality of outlet ducts;
Each of the plurality of blowing ducts is divided into two in the width direction by a dividing portion provided in the center,
The cooling unit further includes a fixing support member that fixes the divided portion to a radiator core support of the vehicle to which the heat exchanger is fixed.
The cooling unit according to claim 5,
The cooling unit, wherein the fixed support member is a hood lock stay.
The cooling unit according to claim 1,
The cooling unit, wherein each of the plurality of blowing ducts has a teardrop-shaped cross section, and the curved portion of the teardrop-shaped cross section is disposed toward the front of the vehicle.