JP2006082597A - Vehicular cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device capable of preventing degradation of the performance of an auxiliary machine component such as a condenser caused by the heat damage by the turn-around of air used for cooling while the auxiliary machine component such as the condenser is mounted on a vehicle. <P>SOLUTION: The vehicular cooling device installed in an engine room comprises at least one heat exchange unit to perform the cooling through the heat exchange by outside air, and at least one fan to suck outside air and allow the outside air to pass through the heat exchange unit. The cooling device emits the heat generated in the engine room such as the waste heat after the cooling by the cooling device outside the vehicle by providing at least one opening for waste heat in an under cover installed below the cooling device and the engine as a lower cover of the engine room. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a vehicular cooling device, and more particularly to a condenser of a vehicular air conditioner.
In addition, the present invention is applied to prevent performance degradation due to heat damage of engine room accessory parts by releasing heat generated in the engine room of the automobile to the outside of the room.

  In recent years, with the reduction of the engine room and the diversification of parts functions due to the expansion of the boarding space, the mounting of parts in the room is becoming overcrowded. The heat generated in the room due to overcrowding becomes difficult to leak to the outside, and as a result, heat damage occurs on the auxiliary parts, resulting in reduced performance (efficiency) (examples of heat damage in FIGS. 13 to 15). reference). For this reason, it has become a social need to fully draw out the performance of auxiliary equipment parts when mounted on an actual vehicle.

  In an automobile, a condenser (refrigerant condenser) of an air conditioner is generally an air cooling system that cools the refrigerant by outside air. However, due to overpacking of components, as shown in FIG. A part of it goes around and gets mixed into the outside air. In such a state, the cooling performance of the capacitor is reduced. This is shown in FIG. 14 shows the temperature distribution on the front surface of the capacitor in an easy-to-understand manner. FIG. 14A shows a state without wraparound, and FIG. 14B shows a state with wraparound. According to this, when there is a wraparound, a high temperature portion exists in a considerably wide area on the side portion of the capacitor as shown by being surrounded by a broken line. In such a state with wraparound shown in FIG. 14B, the performance of the capacitor is considerably degraded as compared with the state without wraparound as shown in FIG.

Conventionally, there has been a proposal for providing a shielding plate around a capacitor with respect to the air sneaking as described above. However, in the case of this conventional plan, it is necessary to change the shape of the shielding plate each time when the type of the vehicle is different. Moreover, there is a possibility that further overcrowding will occur, such as requiring a space for assembling the shielding plate.
In addition, there is another proposal (for example, see Patent Document 1) regarding air sneaking around in a condenser of a vehicle air conditioner.
Further, Patent Document 2 proposes an undercover structure that improves ventilation in the engine room of a vehicle without considering air sneaking around the condenser.

JP 2001-090538 A JP-A-10-24867

The present invention has been made in view of the circumstances described above, and prevents deterioration of the performance of auxiliary components such as a capacitor due to heat damage caused by the wraparound of air used for cooling in a state where the auxiliary components such as a capacitor are mounted on an actual vehicle. The object is to provide a possible cooling device.
It is a further object of the present invention to promote waste heat exhaustion in the room by utilizing the air flow generated by the electric fan in the engine room without adding any parts, and to provide a condenser when mounted on an actual vehicle. The purpose is to improve the performance of auxiliary machine parts.

  In order to achieve the above-described object, the vehicular cooling device installed in the engine room is provided with at least one heat exchanging part that exchanges heat by outside air and cools the outside air. And at least one fan that flows through the heat exchanger. The cooling device is provided with at least one opening for waste heat in an under cover installed under the cooling device, the engine, etc. as a lower cover of the engine room. Heat generated in the engine room, such as heat, is released outside the vehicle.

  With this configuration, paying attention to the heat flow in the wake of the electric fan, and using the direction of rotation of the electric fan and the direction of the waste heat in the wake, the opening dedicated to exhaust heat exhaust is underperformed. Installed on the cover to promote exhaust of waste heat to the outside of the vehicle and prevent waste heat exhaust from entering the upstream (cooling air supply side) of the cooling device. Thereby, the heat damage to the cooling device due to the exhaust of the exhaust heat exhaust is avoided, and the performance degradation of the cooling device is prevented.

  According to a second aspect of the present invention, in the first aspect, the waste heat opening is provided in accordance with the direction of hot air discharged from the fan in consideration of the rotation direction of the fan. And

  With this configuration, even when the cooling device includes a plurality of electric fans, the cooling device is provided with a waste heat opening at an appropriate position according to the rotation direction of the fan, and the waste heat exhaust air wraps around. Avoid heat damage to the cooling system and prevent the cooling system from degrading.

According to a third aspect of the present invention, in any one of the first and second aspects, an inclined plate for preventing entry of foreign matter is provided in the opening for waste heat.
According to the present embodiment, by further including the inclined plate for preventing foreign matter from entering, foreign matter can be prevented from entering the engine room due to mud splash from the ground while the vehicle is running.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the variable angle of the opening area of the opening can be relatively changed around the waste heat opening. A slit is provided.

  According to this embodiment, by further providing the variable speed variable slit, it is possible to prevent an increase in aerodynamic resistance and noise that may occur due to the provision of the waste heat opening.

  According to a fifth aspect of the present invention, in any one of the fourth aspect, the variable slit operates to change a relative opening area of the opening according to a vehicle speed. It is a type.

  According to this embodiment, since the relative opening area of the waste heat opening is changed according to the vehicle speed, an increase in aerodynamic resistance and noise that may occur due to the provision of the waste heat opening are further reduced. It can be effectively prevented.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the cooling device is installed between the heat exchanging portion and the fan and has a wind guide for the fan. A fan shroud that forms a path is provided, and an air guide that restricts a flow direction of waste heat exhaust gas is further provided at an end surface portion of the fan shroud.
According to this embodiment, the waste heat opening can be provided at a specific position regardless of the rotation direction of the electric fan, and the number of openings provided in the under cover can be reduced by at least one place.

According to a seventh aspect of the present invention, in any one of the first to sixth aspects, a total opening area of the at least one waste heat opening is 200 mm ² or more.
According to this embodiment, a more specific form of the waste heat opening is disclosed.

The cooling device of the embodiment of the present invention described below is specifically a condenser for a vehicle air conditioner. Hereinafter, a cooling device according to an embodiment of the present invention, specifically, a capacitor for a vehicle air conditioner will be described in detail with reference to the drawings.
1 and 2 schematically show a first embodiment of a condenser for a vehicle air conditioner according to the present invention, and FIG. 1 is a schematic diagram showing a state in which the condenser of the present invention is mounted on an actual vehicle. FIG. 2 is a schematic plan view showing an arrangement in the vicinity of the capacitor in the engine room of FIG.

  First, referring to FIG. 1, the arrangement of a refrigeration cycle apparatus and an air conditioner in an engine room of a vehicle is shown. FIG. 1 shows a state in which a condenser 1 for an air conditioner and a compressor 4 for an air conditioner are mounted, and a state in which an air conditioner body 6 is mounted in a vehicle compartment adjacent to the engine room. FIG. 2 is a plan view of FIG. 1 as viewed from above, in which the capacitor 1, the electric fan 2, and the engine 5 are arranged in this order from the front of the vehicle toward the passenger compartment. The underside of these devices is covered with an under cover 7 to protect these devices from splashing of water, mud, pebbles, etc. during traveling. Since the fan shroud 3 is installed so as to cover the space between the electric fan 2 and the condenser 1 to form a cooling air passage, the electric fan 2 sucks all air from the front side of the condenser 1.

  In the present embodiment, at least one rectangular opening 8 for waste heat is provided in a region surrounded by a dotted line of the under cover 7 shown in FIG. 2, and the cooling air of the condenser 1 is discharged to the external environment through the opening 8. The opening 8 is provided in the under cover 7 at a position between the electric fan 2 and the engine 5. Specifically, the optimum value of the size, position and quantity of the opening 8 is determined based on the calculation of the air flow. In the present embodiment, the shape of the opening 8 is rectangular, but other shapes such as a circle and an ellipse may be used. Conventionally, the under cover 7 is provided with a hole for vehicle maintenance or an exhaust pipe, and there is a case where a little waste heat is secondarily performed from the hole, but the effect as in the embodiment of the present invention is achieved. It does not demonstrate.

  In the second embodiment of the present invention, two electric fans 2Pa and 2Dr having substantially the same capacity are provided for one capacitor 1, and in this case, the rotation direction of each electric fan is provided. Because of the difference between the electric fan and the engine 5, the rear flow of the air generated between the electric fan and the engine 5 is greatly different. Let FIG. 3 is a diagram showing the relationship between the rotation direction of the electric fan and the position of the waste heat opening, and shows the position of the opening 8 of the under cover 7 corresponding to the rotation direction of the electric fans 2Pa and 2Dr. The upper side of FIG. 3 shows a front view of the capacitor 1 as viewed from the passenger compartment side (air discharge side), and the lower side is a plan view of the capacitor 1 and the undercover 7 as viewed from above. Indicated. 3, the element parts of FIG. 3 that are the same as or similar to the element parts of the first embodiment disclosed in FIGS. 1 and 2 are designated by the same reference numerals.

In FIG. 3A, the electric fans 2Pa and 2Dr are both inward, that is, the left fan 2Pa rotates clockwise (clockwise rotation), and the right fan 2Dr rotates counterclockwise (counterclockwise rotation). As shown in FIG. 3 (A), the hot air after passing through the air flows toward the lower central part of both fans, so that the waste heat opening 8 is located between the fans 2Pa and 2Dr and the engine 5 and both shafts of both fans. Centrally located between. Since the waste heat opening 8 discharges 10% or more of the total air volume of the electric fans 2Pa and 2Dr, the opening area is 200 mm ² or more.

In FIG. 3B, the electric fans 2Pa and 2Dr are both in the outward direction, that is, the left fan 2Pa rotates counterclockwise (counterclockwise rotation), and the right fan 2Dr rotates clockwise (clockwise rotation). As shown in FIG. 3 (B), the hot air after passing through both of the fans flows under the rotation center axis toward the center, so that the two waste heat openings 8a and 8b are respectively connected to the fans 2Pa and 2Dr and the engine. 5 and within the same width as each fan, it is arranged so as to be substantially aligned with the central axis of rotation of each fan. As in the case of FIG. 3A, the total area of the waste heat openings 8 is 200 mm ² or more, more preferably 100 mm ² or more.

In FIG. 3C, both the electric fans 2Pa and 2Dr rotate clockwise, that is, both the left fan 2Pa and the right fan 2Dr rotate clockwise, and the hot air after passing through the condenser 1 is shown in FIG. ), The left fan 2Pa flows substantially below the central axis, and the right fan 2Dr flows outside the central axis, so that the two waste heat openings 8a and 8b are located between the fans 2Pa and 2Dr and the engine 5 in the longitudinal direction. In the width direction, the left waste heat opening 8a is substantially aligned with the rotation center axis of the left fan Pa, and the right waste heat opening 8b is within the width of the right fan 2Dr from the rotation center axis. Place in the outer area. As in the case of FIG. 3A, the total area of the waste heat openings 8 is 200 mm ² or more, more preferably 100 mm ² or more.

In FIG. 3D, both the electric fans 2Pa and 2Dr rotate counterclockwise, that is, both the fans 2Pa and 2Dr rotate counterclockwise. The hot air after passing through the capacitor 1 is shown in FIG. As shown, the left fan 2Pa is outside the central axis and the right fan 2Dr flows almost under the central axis, so that the two waste heat openings 8a, 8b are located between the fans 2Pa, 2Dr and the engine 5 in the longitudinal direction. In the width direction, the left waste heat opening 8a is substantially in the region outside the rotation center axis within the width of the left fan Pa, and the right waste heat opening 8b is substantially in the rotation center axis of the right fan 2Dr. Arrange to align. As in the case of FIG. 3A, the total area of the waste heat openings 8 is 200 mm ² or more, more preferably 100 mm ² or more.
In the second embodiment, the arrangement of one or a plurality of openings is set corresponding to the relative rotational directions of the two fans. When the rotation directions of the two fans are opposite, the arrangement direction of the two fans is symmetrical with respect to the middle of the two fans, whether it is a single opening or multiple openings. An opening is placed. When the rotation directions of the two fans are the same, the opening is arranged so as to be biased to either the left or right with respect to the middle of the two fans with respect to the arrangement direction of the two fans. In the case where a plurality of openings are provided, only one of the openings can be biased. When the rotation direction of the two fans is clockwise when viewed from the rear of the vehicle, the opening is biased to the right, and when the rotation direction of the two fans is counterclockwise when viewed from the rear of the vehicle Is arranged with the opening biased to the left.

  4 and 5 show a third embodiment of the present invention, and this third embodiment is a modification of the first embodiment. 4 and 5, the element parts of FIGS. 4 and 5 that are the same as or similar to the element parts of the first embodiment disclosed in FIGS. 1 and 2 are designated by the same reference numerals. FIG. 4 is a drawing similar to FIG. 2, and is a plan view of the arrangement of the capacitor 1, the electric fan 2, the engine 5 and the like as viewed from above. This is a case where there is one electric fan 2 as in the first embodiment. FIG. 5 is a sectional view taken along line A-A ′ in FIG. 4. In the third embodiment, in consideration of intrusion of foreign matter into the engine room due to mud splashing from the running ground, the inclined plate 11 is provided at the end face of the opening 8 with respect to the opening 8 of the under cover 7. Provide (see FIG. 5). The inclination (taper) angle of the inclined plate 11 is 90 ° at the maximum, and the height of the inclined plate is 100 mm or less in consideration of the mounting height of the electric fan 2. As shown in FIG. 5, the inclined plate 11 is inclined toward the electric fan 2 (in the vehicle front direction). Other configurations in the third embodiment are the same as those in the first embodiment, and therefore, description is omitted to avoid duplication. Although the third embodiment has been described as a modification of the first embodiment, the inclined plate 11 for preventing foreign matter intrusion, which is a feature of the third embodiment, is a waste of the second embodiment. It may be applied to a thermal opening. The inclined plate 11 defines the opening 8. The opening 8 is defined as a short passage extending from the front to the rear of the vehicle, that is, inclining along the air flow direction in the engine room. The inclined plate 11 provides an inclined surface that is inclined from the inside of the engine room to the outside of the engine room from the front to the rear of the vehicle at the upper part and the rear of the opening 8. The inclined plate 11 can be provided by a member that provides such an inclined surface. The inclination of the inclined plate 11 in the vehicle front-rear direction is oriented so that the substantially central portion of the electric fan 2 is located on the extension. The tip of the inclined plate 11 is separated from the electric fan 2 by a predetermined distance toward the rear of the vehicle, and is located between the electric fan 2 and the engine 5. The opening 8 and the inclined plate 11 can be provided by a so-called louver. In this case, the inclined plate 11 can be provided by a plurality of plates arranged in parallel, and the opening 8 can be provided by a plurality of slit-like openings partitioned between the plates.

FIGS. 6 to 9 show a fourth embodiment of the present invention, which is another modification of the first embodiment. 6 and 7, the element parts of FIGS. 6 and 7 that are the same as or similar to the element parts of the first embodiment disclosed in FIGS. 1 and 2 are designated by the same reference numerals. FIG. 6 is a drawing similar to FIG. 2, and is a plan view of the arrangement of the capacitor 1, the electric fan 2, the engine 5 and the like as viewed from above. This is a case where there is one electric fan 2 as in the first embodiment. FIG. 7 is a sectional view taken along line BB ′ in FIG. In the fourth embodiment, in order to consider vehicle aerodynamic performance and noise during traveling, the opening 8 of the under cover 7 is provided with a variable angle slit 20 that can be called a speed variation type or a speed response type.
As a specification of the variable angle slit 20, when the exhaust heat environment to the outside of the vehicle is the most severe at idling (vehicle speed 0 km / h), the slit 20 is fully opened (opening angle is 90 ° or less) to perform waste heat, At 60 km / h or more, the waste heat environment outside the vehicle is not severe, so the slit 20 is fully closed (0 ° or more). Note that, when 0 (km / h) <vehicle speed <60 (km / h), the slit 20 is set to a fully variable <variable angle <fully closed speed variation type as the speed increases. In order to realize such adjustment of the angle according to the traveling speed of the vehicle, for example, the angle variable slit 20 can be supported by a hinge so as to be swingable. Furthermore, a servo motor as a drive device that adjusts the angle of the angle variable slit 20, a microcomputer as a control device that controls the position of the servo motor, and a vehicle speed sensor as a detection device that detects the traveling speed of the vehicle. Can be provided.

  In the present embodiment, the waste heat opening 8 has a rectangular shape, but may have other shapes. FIG. 8 is a plan view of the slit 20 as seen from above as in FIG. 1 or 6, and FIG. 9 is a side view of the slit 20. The slit 20 rotationally drives the two slit plates 21 installed before and after the waste heat opening 8, the slit rotary shaft 23 to which the respective slit plates 21 are attached, and the slit rotary shaft 23. And an angle control motor mechanism 25. As described above, the angle control motor mechanism 25 rotates the slit rotation shaft 23 according to the vehicle speed, thereby changing the inclination of the slit plate 21 and changing the opening degree of the waste heat opening 8. The two slit plates 21 may be controlled in pairs or individually. The angle control motor mechanism 25 may include one motor, or may include two motors corresponding to the two slit rotation shafts 23. The angle control motor mechanism 25 may include a known power transmission device such as a speed reducer. The two slit plates 21 are preferably arranged in the front-rear direction of the vehicle as shown in FIG. 9 and have the function of the inclined plate 11 for preventing entry of foreign matter according to the third embodiment. Other configurations in the fourth embodiment are the same as those in the first embodiment, and therefore, description is omitted to avoid duplication. The fourth embodiment has been described as a modification of the first embodiment. However, the variable speed angle variable slit 20 that is a feature of the fourth embodiment is not used in the second embodiment. It may be applied to a thermal opening.

FIG. 10 to FIG. 12 show a fifth embodiment of the present invention, which is a modification of the second embodiment. 10 to 12, the element parts of FIGS. 10 to 12 that are the same as or similar to the element parts of the first embodiment disclosed in FIGS. 1 and 2 are designated by the same reference numerals. . FIG. 10 is a plan view similar to the lower plan view of FIG. 3A, and is a plan view of the arrangement of the capacitor 1, the electric fan 2, the engine 5, and the like as viewed from above. This is the case where there are two electric fans 2 as in the second embodiment. 11 is a front view of the capacitor 1 similar to the upper side of FIG. 3A, and FIG. 12 is a side view similar to FIGS. 5th Embodiment is an Example which performs waste heat from the same installation opening 8 of the undercover 7, irrespective of the influence of the rotation direction of an electric fan. As an implementation method, an air guide 31 is installed on the outer periphery of the end face (blade cover) of the shroud 3 of the electric fans 2Dr and 2Pa (see FIG. 11) to guide the waste hot air coming from the electric fans 2Dr and 2Pa Regulate the flow along 31.
The outer circumferential winding amount of the air guide 31 is 90 ° or more with respect to the center of the fan shaft, and the guide height gradually increases from the winding start point to the end point (end height: Within 100 mm).
The other configurations in the fifth embodiment are the same as those in the second embodiment, and thus the description is omitted to avoid duplication. Although the fifth embodiment has been described as a modification of the second embodiment, the third embodiment and / or the fourth embodiment may be incorporated in the fifth embodiment. .

Next, effects and operations of the above embodiment will be described.
The following effects can be expected from the cooling device including the condenser for the vehicle air conditioner according to the first embodiment of the present invention.
-Focusing on the heat flow in the wake of the electric fan, and using the direction of rotation of the electric fan and the direction of the waste heat in the wake, a dedicated opening for waste heat exhaust is installed in the under cover, and the waste heat Is promoted to the outside of the vehicle to prevent the exhaust of exhaust heat exhaust from entering the upstream (cooling air supply side) of the cooling device.
-This avoids thermal damage to the cooling device due to the exhaust of exhaust heat and prevents the performance of the cooling device from degrading.

In addition to the effects of the first embodiment, the following effects can be expected from the cooling device according to the second embodiment of the present invention.
・ Even if the cooling device is equipped with two electric fans, a waste heat opening is provided at an appropriate position according to the rotation direction of the fan to avoid heat damage to the cooling device due to the exhaust of waste heat exhaust And preventing the performance of the cooling device from degrading.

With the cooling device according to the third embodiment of the present invention, the following effects can be expected in addition to the effects of the first and second embodiments.
By further providing an inclined plate for preventing foreign matter from entering, foreign matter can be prevented from entering the engine room due to mud splashes from the ground while the vehicle is running.

With the cooling device according to the fourth embodiment of the present invention, the following effects can be expected in addition to the effects of the first, second, and third embodiments.
-Further, by providing a variable speed angle variable slit, it is possible to prevent noise during traveling of the vehicle that may be caused by providing a waste heat opening.
・ Also, by changing the relative opening area of the waste heat opening according to the speed of the vehicle, the exhaust heat is sufficiently discharged during idle operation, and the problem of waste heat is reduced during high speed operation. It is possible to suppress etc.

The following effects can be expected from the fifth embodiment of the present invention.
This makes it possible to provide the waste heat opening 8 at a specific position (see FIG. 10) regardless of the rotation direction of the fans 2Dr and 2Pa, and to reduce the number of openings 8 in the under cover 7 (one place). It becomes possible.

In the above description, the cooling device of the present invention has been described as a condenser for an air conditioner. However, the device may be a cooling device for a vehicle other than the capacitor.
In the embodiment described above or shown in the accompanying drawings, the number of electric fans included in the cooling device is one or two. However, the number of electric fans may be larger than this. Further, the number of capacitors (heat cores) included in the cooling device may be other than one.

  The above-described embodiment is an example of the present invention, and the present invention is not limited by the embodiment, but is defined only by matters described in the claims, and other embodiments than the above are also possible. It can be implemented.

FIG. 1 is a schematic three-dimensional view showing a state in which the capacitor according to the first embodiment of the capacitor for a vehicle air conditioner according to the present invention is mounted on an actual vehicle. FIG. 2 is a schematic plan view showing an arrangement in the vicinity of the capacitor in the engine room of FIG. FIG. 3 is a diagram showing the relationship between the rotation direction of the electric fan and the position of the waste heat opening in the condenser according to the second embodiment of the present invention. The front view seen from the side which discharges) is shown, The top view which looked at the capacitor | condenser, the undercover, etc. from the upper part is shown by the lower part side. FIG. 4 is a drawing similar to FIG. 2, and is a plan view of the arrangement of the third embodiment of the present invention as seen from above. FIG. 5 is a sectional view taken along line A-A ′ in FIG. 4. FIG. 6 is a drawing similar to FIG. 2 and is a plan view of the arrangement of the fourth embodiment of the present invention as seen from above. FIG. 7 is a sectional view taken along line B-B ′ in FIG. 6. FIG. 8 is a plan view of the slit of the fourth embodiment as seen from above as in FIG. FIG. 9 shows a side view of the slit of FIG. FIG. 10 is a view similar to the lower plan view of FIG. 3 (A) and the like, and is a plan view of the arrangement of the fifth embodiment of the present invention as seen from above. FIG. 11 is a front view of the capacitor of the fifth embodiment, which is the same as the upper side of FIG. FIG. 12 is a view similar to FIGS. 5 and 7 and is a side view of the fifth embodiment. FIG. 13 is a schematic three-dimensional view showing a state in which a conventional capacitor for a vehicle air conditioner is actually mounted. 14A and 14B are diagrams showing the temperature distribution on the front surface of the capacitor in an easy-to-understand manner. FIG. 14A shows a state without wraparound, and FIG. 14B shows a state with wraparound. FIG. 15 is a graph comparing the performance of the capacitor with and without the wraparound state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Capacitor 2 Electric fan 3 Fan shroud 4 Compressor 5 Engine 7 Under cover 8 Opening

Claims (7)

In the vehicular cooling device installed in the engine room, this cooling device is:
At least one heat exchanging part that cools by exchanging heat with outside air;
At least one fan that sucks outside air and flows through the heat exchange section;
It has
The engine for waste heat after cooling of the cooling device is provided by providing at least one opening for waste heat in an under cover installed under the cooling device, engine, etc. as a lower cover of the engine room. A cooling device that releases heat generated in a room to the outside of the vehicle.   The cooling device according to claim 1, wherein the waste heat opening is provided in accordance with a direction of hot air discharged from the fan in consideration of a rotation direction of the fan.   The cooling apparatus according to claim 1, wherein an inclined plate for preventing foreign matter intrusion is provided in the opening for waste heat.   The cooling apparatus according to any one of claims 1 to 3, further comprising an angle variable slit that can relatively change an opening area of the opening in a peripheral portion of the waste heat opening.   The cooling device according to claim 4, wherein the variable slit is a speed variation type that operates so as to change a relative opening area of the opening in accordance with a vehicle speed. The cooling device is
A fan shroud that is installed between the heat exchange unit and the fan and forms an air guide path of the fan;
The cooling device according to any one of claims 1 to 5, further comprising an air guide that regulates a flow direction of waste heat exhaust gas at an end surface portion of the fan shroud. The cooling device according to any one of claims 1 to 6, wherein a total opening area of the at least one waste heat opening is 200 mm ² or more.

Images