JP5216613B2 - Vehicle cooling system - Google Patents

Description

  The present invention relates to a vehicular cooling device that cools a refrigerant of an air conditioner or a power unit.

  As this type of conventional vehicle cooling device, there is one disclosed in Patent Document 1. As shown in FIG. 6, the vehicle cooling device 100 includes an air conditioning condenser 101, a radiator 102, and a blower 103 arranged in an engine room of the vehicle. The air conditioning condenser 101 cools the refrigerant by exchanging heat between the refrigerant used for air conditioning in the passenger compartment and the cooling air. The radiator 102 cools the cooling water by exchanging heat between the cooling water used for cooling the engine and the cooling air.

  On the upstream side of the upper and lower ends of the air conditioning capacitor 101 and the lower ends of the air conditioning capacitor 101 and the radiator 102, hot air sneaking prevention ducts 104 and 105 are provided, respectively. Thus, the heated cooling air (hereinafter referred to as hot air) after passing through the air conditioning condenser 101 or the radiator 102 circulates from outside the upper and lower ends of the air conditioning condenser 101 or the radiator 102, and the circulated hot air is again used for air conditioning. The heat exchange performance is prevented from deteriorating through the condenser 101 and the like.

JP 2005-35476 A

  By the way, the above-described vehicle cooling device 100 is installed in the engine room 110 of the vehicle as shown in FIG. An upper air suction port 112 and a lower air suction port 113 are opened in front of the engine room 110 with the bumper 111 as a boundary. An opening 114 is formed below the engine room 110 so that the cooling air that has passed through the vehicular cooling device 100 does not stay in the engine room 110. Cooling air is sucked from the upper air suction port 112 and the lower air suction port 113 by the suction force of the blower 103, and the sucked cooling air passes through the air conditioning condenser 101 and the radiator 102 in this order, and is externally connected through the opening 114 and the like. To be discharged.

  On the other hand, as shown in FIG. 7B, the blower 103 includes a motor unit 120, a blade unit 121 that is rotated by the motor unit 120, and a shroud 122 that is disposed on the outer periphery of the blade unit 121 and supports the motor unit 120. It is configured. A circular opening 122 a is formed in the shroud 122 along the tip rotation locus of the blade 121. By forming the circular opening 122a in this way, a strong suction force by the rectified air is obtained. On the other hand, the area outside the circular opening 122a has a weak suction force by blowing air. In particular, near the four corners of the shroud 122, the air is likely to stay.

  When there is no traveling wind as during idling, the cooled cooling air (hereinafter referred to as hot air) that has passed through the air conditioning condenser 101 and the radiator 102 exits from the opening 114 below the vehicle body, There is a case of going around the front of the car Then, cooling air is sucked from the upper air suction port 112, but hot air is sucked from the lower air suction port 113. Then, the hot air sucked from the lower air suction port 113 sucked into the area with weak suction force moves upward due to the air density as shown by the arrow in FIG. 7B. A hot air retention area E is formed. When hot air stays in this way, there is a problem that the heat exchange performance of the air-conditioning capacitor 101 and the like deteriorates.

  Accordingly, the present invention has been made to solve the above-described problems, and provides a vehicular cooling device that can suppress a decrease in heat exchange performance caused by the retention of hot air that has circulated from below the vehicle. With the goal.

In the first aspect of the present invention, a heat exchanger and a blower are arranged in an interior space of a vehicle in which an air inlet is opened, and the heat exchanger is sucked from the air inlet by the refrigerant flowing inside and the suction force of the fan. A cooling device for a vehicle that cools the refrigerant by exchanging heat with the cooled air , provided with a partition member that vertically partitions a space between the air suction port and the heat exchanger , The air suction port (21) has an upper air suction port (21a) and a lower air suction port (21b) provided at the upper and lower positions with the bumper (22) as a boundary, and the heat exchanger (2). Is used for cooling the air conditioning condenser (4A) for air conditioning that cools the first refrigerant by exchanging heat between the first refrigerant used for air conditioning in the passenger compartment and the cooling air, and the motor (31) for the vehicle. Heat exchange between the second refrigerant and the cooling air causes the second cooling A sub-radiator (5) for cooling the sub-radiator (5), the air-cooling condenser for air conditioning (4A) is disposed at the lower part, and the sub-radiator (5) and the air-cooling for air conditioning are arranged. The partition members (7) and (7A) partition between the capacitor portions (4A) .

The invention of claim 2 is the vehicle cooling device according to claim 1 , wherein the air conditioning condenser exchanges heat between the first refrigerant used for air conditioning in the passenger compartment and the cooling air to obtain the first refrigerant. An air-cooling condenser for air conditioning that cools and a water-cooling condenser for air conditioning that is arranged in the second refrigerant of the sub-radiator and cools the first refrigerant by exchanging heat between the second refrigerant and the first refrigerant. The first refrigerant is configured to flow in the order of the air-cooled water-cooled condenser part and the air-conditioned air-cooled condenser part.

A third aspect of the present invention is the vehicle cooling apparatus according to the first or second aspect , wherein the partition member is a partition duct.

A fourth aspect of the present invention, there is provided a vehicular cooling apparatus according to any one of claims 1 to 3, together with the air-conditioning air-condenser section is configured so that it can be operated as an evaporator, the partition The member is provided movably between a partition position that partitions the space between the air suction port and the sub radiator and the air-cooling condenser for air conditioning in a vertical direction and a shielding position that shields the front surface of the sub radiator. When the air-cooling condenser for air conditioning is operated as a condenser, the partition member is shifted to a partition position, and when the air-cooling condenser for air conditioning is operated as an evaporator, the partition member is It is characterized by being shifted to the shielding position.

  According to the first aspect of the present invention, when there is no traveling wind as in idling, when the heated cooling air (hereinafter referred to as hot air) after passing through the heat exchanger flows into the air suction port from below the vehicle. There is. In such a situation, cooling air is sucked from the upper side of the air suction port, and hot air is sucked from the lower side of the air suction port. Of the hot air sucked from the lower side of the air suction port, the one sucked into the weak suction area moves upward due to the air density, but rises to the vicinity of the uppermost corner of the blower shroud by the partition member Since it cannot, it passes through a heat exchanger without staying. On the other hand, among the cooling air sucked from the upper side of the air suction port, the air sucked in the area with weak suction force may stay near the uppermost corner of the shroud. This is not done, and does not cause much reduction in heat exchange by the heat exchanger. From the above, it is possible to suppress a decrease in heat exchange performance due to the stay of hot air that has circulated from below the vehicle.

According to the first aspect of the present invention, since the hot air that has entered from the lower side of the vehicle is restricted from rising by the bumper and is reliably sucked from the lower air suction port, the hot air is not sucked from the upper air suction port. And the fall of the heat exchange performance resulting from the stay of the hot air which went around from the downward direction of a vehicle can be suppressed reliably.

According to the present invention, the electric vehicles using both an engine and an electric motor only hybrid electric vehicle or an electric motor to a power source as a power source, the effect of the invention of claim 1 or claim 2 is obtained. According to the invention of claim 1, since the temperature difference between the first refrigerant and the cooling air is larger than the temperature difference between the second refrigerant and the cooling air, the hot air is guided to the air-cooling condenser for air conditioning. However, the heat exchange performance will not be greatly reduced, but on the other hand, if hot air is introduced to the sub-radiator, the heat exchange performance will be greatly reduced. It is possible to suppress the decrease in heat exchange performance caused by the as much as possible.

According to the invention of claim 2 , the effect of the invention of claim 1 can be obtained not only for the air-cooling condenser for air conditioning but also for the water-cooling condenser for air conditioning.

According to the invention of claim 3 , in addition to the effect of the invention of claim 1 or 2 , the hot air sucked from the lower side of the air suction port and the cooling air sucked from the upper side of the air suction port are divided into the partition ducts. Therefore, it is possible to prevent the heat of the hot air from being transmitted to the cooling air as much as possible.

According to the invention of claim 4, in addition to the effect of any one of the claims 1 to 3, as the air-conditioning air-condenser unit is in the case of operating as a condenser (cooling operation), and the And the fall of the heat exchange performance resulting from the stay of the hot air which went around from the downward direction of a vehicle can be suppressed. In addition, when the air-cooling condenser for air conditioning is operated as an evaporator (during heating operation), the second refrigerant is not cooled by the cooling air in the sub-radiator, and the second refrigerant is higher in the air-cooling condenser than the high-temperature second refrigerant. Since one refrigerant can absorb heat, the heat exchange efficiency in the water-cooled condenser for air conditioning is improved.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the cooling device for vehicles installed in the engine room which shows 1st Embodiment of this invention, the left side of a paper is a vehicle front end part, and the upper and lower sides of a paper are weight direction up and down. 1A and 1B show a first embodiment of the present invention, in which FIG. 1A is a perspective view of a heat exchanger viewed from the upstream side of the flow of cooling air, and FIG. 2B is a perspective view of the heat exchanger viewed from the downstream side of the flow of cooling air. FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is a principal part block diagram of the system which shows 1st Embodiment of this invention and the vehicle cooling device was integrated. 1A and 1B show a first embodiment of the present invention, in which FIG. 1A is a side view illustrating a flow of cooling air sucked by a vehicle cooling device when idling, and FIG. 1B is a cooling sucked by the vehicle cooling device. It is a front view, such as an air blower, for demonstrating the flow of a wind. It is a block diagram of the cooling device for vehicles installed in the engine room, showing the second embodiment of the present invention, with the left side of the paper being the front end of the vehicle and the top and bottom of the paper being the top and bottom in the weight direction. It is a block diagram of the cooling device for vehicles of a prior art example. (A) is a block diagram which shows the state which installed the cooling device for vehicles of the prior art example in the engine room, (b) is front surfaces, such as a fan for demonstrating the flow of the cooling air attracted | sucked by the cooling device for vehicles. is there.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
1 to 5 show a first embodiment of the present invention. FIG. 1 is a configuration diagram of a vehicular cooling device installed in an engine room, with the left side of the page being the front end of the vehicle and the upper and lower sides of the page being in the weight direction. FIG. 2A is a perspective view of the heat exchanger viewed from the upstream side of the cooling air flow, FIG. 2B is a perspective view of the heat exchanger viewed from the downstream side of the cooling air flow, and FIG. FIG. 4A is a side view illustrating the flow of cooling air sucked into the vehicle cooling device when idling, and FIG. 4B is a vehicle cooling system. It is a front view, such as a blower, for demonstrating the flow of the cooling air attracted | sucked by the apparatus.

  As shown in FIG. 1, the vehicle is a hybrid electric vehicle using an engine 30 and an electric motor 31 (shown in FIG. 3) as a power unit, and the engine 30 is mounted in the engine room 20. An air suction port 21 is opened at the front of the engine room 20. The air suction port 21 is composed of an upper air suction port 21a and a lower air suction port 21b provided at a vertical position with the bumper 22 as a boundary. A grill 23 is installed in the upper air suction port 21a. An opening 24 for releasing the heat in the engine room 20 is opened below the engine 30 in the engine room 20. A cooling air duct 25 is provided in the engine room 20 and between the air suction port 21, the engine 30, and the opening 24, and the vehicle cooling device 1 </ b> A is installed in the cooling air duct 25. is set up.

As shown in detail in FIGS. 2A, 2 </ b> B, and 3, the vehicular cooling device 1 </ b> A includes a heat exchanger 2 and a blower 3. The heat exchanger 2 and the blower 3 are arranged along the flow of cooling air from the air suction port 21. The heat exchanger 2 includes an air conditioning condenser 4 and a sub-radiator 5 installed at the same position in the flow direction of the cooling air, and a main radiator 6 installed at a downstream position from these. The air-conditioning condenser 4 includes an air-conditioning air-cooling condenser 4A that cools the first refrigerant by exchanging heat between a first refrigerant (for example, carbon dioxide) that is used for air-conditioning in the passenger compartment and cooling air, and a sub radiator 5 An air-conditioning water-cooled condenser unit 4B (shown in FIG. 3) is disposed in one tank unit 5a, that is, in the second refrigerant, and cools the first refrigerant by exchanging heat between the second refrigerant and the first refrigerant. The first refrigerant flows in the order of the air-cooled water-cooled condenser unit 4B and the air-conditioned air-cooled condenser unit 4A.

  The sub radiator 5 cools the second refrigerant by exchanging heat between the second refrigerant (for example, cooling water) used for cooling the electric motor 31 and control components and the cooling air. As described above, the sub-radiator 5 and the air-cooling condenser unit 4A are installed at the same position in the flow direction of the cooling air, and the sub-radiator 5 is disposed adjacent to the upper part and the air-cooling condenser part 4A is disposed adjacent to the lower part. The sub-radiator 5 and the air-cooling condenser 4A for air conditioning are substantially the same size as the cross-sectional size of the cooling air duct 25, and are accommodated in the cooling air duct 25 without a gap.

  The main radiator 6 cools the cooling water by exchanging heat between the cooling water used for cooling the engine 30 and the cooling air. The main radiator 6 is approximately the same size as the cross-sectional size of the cooling air duct 25 and is accommodated in the cooling air duct 25 without a gap.

  The air conditioning condenser 4 (air conditioning air cooling condenser section 4A, air conditioning water cooling condenser section 4B), sub-radiator 5 and main radiator 6 have substantially the same basic configuration, and flat tubes and radiating fins are alternately arranged. And a tank part disposed at both ends of the core part. The air-cooling condenser for air conditioning 4A, the sub radiator 5 and the main radiator 6 are fixed to each other by a bracket or the like. In FIGS. 4A and 4B, reference numerals are attached to the tubes, the heat radiation fins, and the tank portion (excluding the tank portion 5a in which the air-cooling water-cooled condenser portion 4B is accommodated). Absent.

  In the space between the air suction port 21 and the heat exchanger 2, a partition duct 7 that is a partition member that partitions the space in the vertical direction is provided. Specifically, the partition duct 7 is disposed at a position that partitions between the upper air suction port 21a and the lower air suction port 21b and between the sub radiator 5 and the air-cooling condenser 4A for air conditioning. The partition duct 7 is a member having a hollow portion, and the hollow portion may be filled with a heat insulating material.

  As shown in FIG. 4B, the blower 3 includes a motor unit 10, a blade unit 11 that is rotated by the motor unit 10, and a shroud 12 that is disposed on the outer periphery of the blade unit 11 and supports the motor unit 10. Has been. A circular opening 12 a is formed in the shroud 12 along the tip rotation locus of the blade portion 11. Since the circular opening 12a is formed in the shroud 12, a strong suction force can be obtained in the area of the circular opening 12a, while only a weak suction force can be obtained outside the circular opening 12a. In particular, the suction force is weak near the four corners of the shroud 12.

  In the above configuration, when the blower 3 is driven, cooling air is sucked into the cooling air duct 25 from the upper air suction port 21a and the lower air suction port 21b. The cooling air sucked from the upper air suction port 21 a passes through mainly the upper portions of the sub radiator 5 and the main radiator 6 and is discharged to the outside through an opening (not shown) of the engine room 20. The cooling air sucked from the lower air suction port 21 b passes through mainly the lower portions of the air-cooling condenser for air conditioning 4 </ b> A and the main radiator 6 and is discharged to the outside through the opening 24 below the engine room 20. Thus, in the process in which the cooling air passes through the air-conditioning air-cooling condenser unit 4A, the sub radiator 5, and the main radiator 6, the first refrigerant and the second refrigerant are cooled by exchanging heat with the cooling air. The cooling air that has passed through these becomes cooling air that has been heated (hereinafter referred to as hot air).

  During traveling of the vehicle, as shown in FIG. 1, the hot air after passing through the air-cooling condenser 4A for air conditioning, the sub radiator 5 and the main radiator 6 is discharged to the outside of the engine room 20 by the traveling ram pressure, Hot air does not enter again from the upper air suction port 21a or the lower air suction port 21b. Therefore, only the cooling air is always sucked continuously from the upper air suction port 21a and the lower air suction port 21b.

  When there is no traveling wind as during idling, as shown in FIG. 4A, hot air after passing through the air-cooling condenser 4A for air conditioning, the sub radiator 5 and the main radiator 6 is sent from the opening 24 to the vehicle. May reach the air suction port 21 around the lower side of the air. Hot air that has flown forward of the vehicle is sucked from the lower air suction port 21b. That is, cooling air is sucked from the upper air suction port 21a, and hot air is sucked from the lower air suction port 21b.

  Of the hot air sucked from the lower air suction port 21b, the hot air sucked into an area having a weak suction force moves upward due to the air density as shown in FIG. Therefore, the cooling air duct 25 cannot move up to the uppermost position of the cooling air duct 25, and can only rise up to the wide position of the circular opening 12a of the shroud 12. Therefore, the air flows toward the air-cooling condenser 4A for air conditioning and the main radiator 6 without staying. On the other hand, among the cooling air sucked from the upper air suction port 21a, the air sucked in the area having a weak suction force may stay near the two corners at the uppermost position of the cooling air duct 25. The wind is not heated, and the heat exchange by the sub radiator 5 and the main radiator 6 is not significantly reduced. That is, the hot air retention area as in the conventional example is not formed. From the above, it is possible to suppress a decrease in heat exchange performance due to the stay of hot air that has circulated from below the vehicle.

  The air suction port 21 is composed of an upper air suction port 21a and a lower air suction port 21b provided at the upper and lower positions with the bumper 22 as a boundary. Since the ascent is restricted and the air is reliably sucked from the lower air suction port 21b, the hot air is not sucked from the upper air suction port 21a, and the heat exchange performance is deteriorated due to the stay of the hot air that has come around from below the vehicle. Can be reliably suppressed.

  The sub-radiator 5 is disposed at the upper part, and the air-cooling condenser for air conditioning 4A is disposed at the lower part, and the sub-radiator 5 and the air-cooling condenser for air conditioning 4A are partitioned by a partition duct 7. Here, the temperature difference between the first refrigerant (eg, 100 ° C.) and the cooling air (eg, 30 ° C.) is larger than the temperature difference between the second refrigerant (eg, 60 ° C.) and the cooling air (eg, 30 ° C.). In addition, even if hot air (for example, 50 ° C.) is introduced into the air-cooling condenser unit 4A for air conditioning, there is a sufficient temperature difference, so that the heat exchange performance is not greatly deteriorated, but on the other hand, hot air (for example, When there is no sufficient temperature difference, the heat exchange performance will be greatly reduced. Therefore, the heat exchange performance will be reduced as much as possible due to the stay of hot air that has circulated from below the vehicle. Can be suppressed.

  The partition member is configured by a partition duct 7. Therefore, the hot air sucked from the lower air suction port 21b and the cooling air sucked from the upper air suction port 21a are partitioned through the partition duct 7, so that the heat of the hot air is transmitted to the cooling air as much as possible. Can be prevented.

(Second Embodiment)
FIG. 5 shows a second embodiment of the present invention, in which the left side of the paper is the front end of the vehicle, the top and bottom of the paper are the top and bottom in the weight direction, and is a configuration diagram of the vehicle cooling device installed in the engine room.

  In FIG. 5, the vehicular cooling device 1B according to the second embodiment is configured such that the air-cooling condenser 4A for air conditioning can also operate as an evaporator as compared with that of the first embodiment. The partition duct 7A, which is a member, includes a partition position (virtual position in FIG. 5) that partitions the space between the air suction port 21, the sub radiator 5 and the air-cooling condenser 4A for air conditioning in the vertical direction, and the front surface of the sub radiator 5. Between the shielding position (solid line position in FIG. 5). When the air-cooling air-cooling condenser unit 4A is operated as a condenser, the partition duct 7A is shifted to the partition position, and when the air-conditioning air-cooling condenser unit 4A is operated as an evaporator, the partition duct 7A is blocked. To change.

  Since other configurations are the same as those of the first embodiment, description thereof will be omitted. In addition, the same code | symbol is attached | subjected to the same structure location of drawing, and it aims at clarification.

  With this configuration, when the air-cooling condenser 4A for air conditioning is operated as a condenser (during cooling operation), as described in the first embodiment, hot air that has circulated from below the vehicle is retained. The resulting decrease in heat exchange performance can be suppressed. In addition, when the air-cooling condenser for air conditioning 4A is operated as an evaporator (during heating operation), the second refrigerant is not cooled by the cooling air in the sub-radiator 5, and the second high temperature in the water-cooling condenser for air conditioning 4B. Since the first refrigerant can absorb heat from the refrigerant, the heat exchange efficiency in the air-cooled water-cooled condenser unit 4B is improved.

(Other)
In the first and second embodiments, when the vehicle cooling devices 1A and 1B include the main radiator 6 and the sub radiator 5 in addition to the air conditioning condenser 4 (hybrid electric vehicle using both the engine and the electric motor as power sources). In the case of having only the air conditioning capacitor 4 and the sub-radiator 5 (electric vehicle using only the electric motor as a power source), or in the case of having only the air conditioning capacitor 4 and the main radiator 6 (engine vehicle). The present invention can also be applied.

  In the first and second embodiments, the air-conditioning condenser 4 has been described as having the air-conditioning air-cooling condenser part 4A and the air-conditioning water-cooling condenser part 4B, but the invention is also provided for those having only the air-conditioning air-cooling condenser part 4A. Of course, it can be applied.

1A, 1B Vehicle cooling device 2 Heat exchanger 3 Blower 4 Air conditioning condenser 4A Air-cooling condenser section 4B Air-cooling condenser section 5 Sub-radiator 7, 7A Partition duct (partition member)
21 Air suction port 21a Upper air suction port 21b Lower air suction port 22 Bumper

Claims (4)

The heat exchanger (2) and the blower (3) are arranged in the interior space of the vehicle where the air inlet (21) is opened, and the refrigerant through which the heat exchanger (2) flows and the suction of the blower (3) A vehicle cooling device (1A), (1B) for cooling the refrigerant by exchanging heat with the cooling air sucked from the air suction port (21) by force,
Partition members (7), (7A) for partitioning the space between the air suction port (21) and the heat exchanger (2) in the vertical direction are provided ,
The air suction port (21) has an upper air suction port (21a) and a lower air suction port (21b) provided at the upper and lower positions with the bumper (22) as a boundary,
The heat exchanger (2) includes an air-cooling condenser (4A) for air conditioning that cools the first refrigerant by exchanging heat between the first refrigerant used for air conditioning in the passenger compartment and the cooling air, and an electric motor ( 31) a sub-radiator (5) that cools the second refrigerant by exchanging heat between the second refrigerant used for cooling and the cooling air;
The sub-radiator (5) is disposed in the upper portion, and the air-cooling air-cooling condenser portion (4A) is disposed in the lower portion, and the partition member (4A) is disposed between the sub-radiator (5) and the air-conditioning air-cooling condenser portion (4A). 7), (7A) is a partition, vehicular cooling device (1A), (1B).   The vehicle cooling device (1A), (1B) according to claim 1,
  The air-conditioning condenser (4) includes an air-conditioning air-cooling condenser (4A) that cools the first refrigerant by exchanging heat between the first refrigerant used for air-conditioning in the passenger compartment and the cooling air, and the sub-radiator (5 ) And a water-cooling condenser for air conditioning (4B) that cools the first refrigerant by exchanging heat between the second refrigerant and the first refrigerant. The vehicle cooling devices (1A) and (1B) are configured to flow in the order of the water-cooled condenser part (4B) and the air-cooled condenser part (4A) for air conditioning.   The vehicle cooling device (1A), (1B) according to claim 1 or 2,
  The vehicle cooling device (1A), (1B), wherein the partition member is a partition duct (7), (7A).   A vehicle cooling device (1B) according to any one of claims 1 to 3,
  The air-cooling condenser for air conditioning (4A) is configured to be operable as an evaporator,
  The partition members (7), (7A) have a partition position that partitions the space between the air suction port (21), the sub-radiator (5), and the air-cooling condenser (4A) for air conditioning in the vertical direction; The sub radiator (5) is provided so as to be movable between a shielding position for shielding the front surface of the sub radiator (5),
  When the air-cooling condenser for air conditioning (4A) is operated as a condenser, the partition members (7) and (7A) are moved to a partition position,
  When the air-cooling condenser for air conditioning (4A) is operated as an evaporator, the vehicle cooling device (1B) is characterized in that the partition members (7) and (7A) are shifted to a shielding position.

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