JP5712973B2 - Vehicle heat exchange device - Google Patents

Description

  The present invention relates to a vehicle heat exchange device including a plurality of heat exchangers.

  As this type of conventional vehicle heat exchange device, there is one disclosed in Patent Document 1. This vehicle heat exchanging device 100 is provided in an engine room of a vehicle (not shown), and houses a water-cooled condenser 103 of a refrigeration cycle in a tank portion 102 of a sub-radiator 101 as shown in FIGS. . The sub-radiator 101 includes a plurality of tubes 104, a plurality of outer fins 105 disposed between the adjacent tubes 104, a pair of inlet side tank portions 106 disposed at both ends in the longitudinal direction of the plurality of tubes 104, and And an outlet side tank unit 102. The inlet side tank unit 106 is provided with an inflow port 107 through which cooling water for control equipment (not shown) flows, and the outlet side tank unit 102 is provided with an outflow port 108 through which cooling water flows out. The water-cooled condenser 103 has a plurality of tubes 111 that are stacked at intervals through which cooling water flows. At both end positions of each tube 111, an inlet 109 and an outlet 110 through which refrigerant for air conditioning of the passenger compartment flows in and out are provided.

  In the above configuration, the cooling water for the control device that has flowed in from the inflow port 107 flows from the inside of one tank portion 106 to the other tank portion 102 through the plurality of tubes 104 and is discharged from the outflow port 108. In this way, the refrigerant flowing in the sub-radiator 101 actively exchanges heat with the external air passing outside the tubes 104 in the process of passing through the tubes 104, whereby the temperature of the cooling water for the control device is lowered. . The passenger compartment air-conditioning refrigerant that has flowed in from the inlet 109 passes through the tubes 111 of the water-cooled condenser 103 and is discharged from the outlet 110. In the process of passing through the tube 111 of the water-cooled condenser 103, heat is exchanged with the cooling water passing through the tank portion 102, thereby lowering the temperature of the refrigerant for vehicle compartment air conditioning.

JP 2010-127508 A

  By the way, in the vehicle heat exchanging device 100 in which the water-cooled condenser 103 of the refrigeration cycle is accommodated in the tank portion 102 of the sub-radiator 101, the water-cooled condenser 103 is damaged and high-pressure refrigerant leaks into the tank portion 102 of the sub-radiator 101. Then, the pressure in the tank portion 102 becomes high, and the sub radiator 101 and the like may be damaged, and the refrigerant may be ejected from the sub radiator 101 into the engine room of the vehicle. As a result, since the jetted refrigerant contains the gas phase refrigerant and oil of the refrigeration cycle, if this oil hits a belt for driving, for example, auxiliary machinery in the engine room, it causes belt slip and the like. There is a problem of becoming.

  Then, an object of this invention is to provide the vehicle heat exchange apparatus which can prevent the malfunction resulting from the refrigerant | coolant ejected from the 1st heat exchanger being applied to the apparatus in an engine room as much as possible.

The present invention includes a first heat exchanger through which a first refrigerant flows, a tank portion of the first heat exchanger, and a high-pressure second refrigerant in a refrigeration cycle flowing through the first heat exchanger. A vehicle heat exchange device comprising a second heat exchanger for exchanging heat between refrigerants, provided in an opening at an upper portion of the tank portion of the first heat exchanger, wherein the internal pressure is a specified pressure. A pressure relief valve that opens the interior to the atmosphere when exceeded, and a flow path regulating portion that is provided inside the tank portion and narrows the refrigerant flow path to the opening of the tank portion to which the pressure relief valve is connected. The flow path restricting portion includes a first restricting wall disposed at a distance from the opening of the tank portion, and is fixed to the first restricting wall and protrudes toward the opening of the tank portion. Projecting into one of the second regulating wall, the second regulating wall and the inner wall of the tank portion It is, when the second restriction wall is displaced to the opening side of the tank portion, and having a stopper wall for preventing the displacement of the second restriction wall.

The first restriction wall is preferably a benzalkonium of having a fragile portion.

  It is preferable that the pressure release valve is provided in a cap attached to the tank portion of the first heat exchanger.

  According to the present invention, the second heat exchanger accommodated in the tank part of the first heat exchanger is damaged, and the second refrigerant leaks from the second heat exchanger into the tank part of the first heat exchanger, and the tank part. When the internal pressure of the tank exceeds the specified pressure, the pressure relief valve opens the inside of the tank part to the atmosphere, and the first refrigerant and the second refrigerant in the tank part are pressurized through the refrigerant flow path narrowed by the flow path regulating part. Head to the release valve. Here, the gas-phase refrigerant in the first refrigerant and the second refrigerant is ejected to the outside from the pressure release valve without much flow restriction by the flow path restriction unit. The liquid phase refrigerant (including oil) is regulated by the flow path regulating unit and cannot flow smoothly, and therefore the pressure in the tank unit is released mainly by the ejection of the gas phase refrigerant. As a result, when the second refrigerant leaks from the second heat exchanger into the tank portion of the first heat exchanger, the first heat exchanger or the like is damaged and the refrigerant is prevented from being ejected into the engine room of the vehicle. In addition, the liquid refrigerant and oil in the first refrigerant and the second refrigerant are not injected as much as possible from the pressure release valve, and it is possible to prevent problems caused by the refrigerant being applied to the device in the engine room as much as possible.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vehicle front portion including a vehicle heat exchange device according to a first embodiment of the present invention. FIG. 3 is an exploded perspective view of the front end module according to the first embodiment of this invention. 1 is a configuration diagram of a vehicle heat exchange device according to a first embodiment of the present invention. 1 is a schematic perspective view of a vehicle heat exchange device according to a first embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a main part of a vehicle heat exchange device according to a first embodiment of the present invention. 1 is a cross-sectional view of a tank portion of a sub radiator according to a first embodiment of the present invention. FIG. 5 is a cross-sectional view of a tank portion of a sub-radiator, showing a second embodiment of the present invention. FIG. 5 is another cross-sectional view of the tank portion of the sub-radiator, showing the second embodiment of the present invention. FIG. 6 is a cross-sectional view of a tank portion of a sub radiator according to a third embodiment of the present invention. It is sectional drawing which shows the 3rd Embodiment of this invention and shows the state which the weak part of the 1st control wall deform | transformed. FIG. 9 is a perspective view of a main part of a vehicle heat exchange device according to a fourth embodiment of the present invention. FIG. 9 is a cross-sectional view of a tank portion of a sub radiator according to a fourth embodiment of the present invention. It is a perspective view of the heat exchanger apparatus for vehicles of a prior art example. It is sectional drawing of the tank part of the sub radiator provided in the heat exchanger apparatus for vehicles of a prior art example.

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

(First embodiment)
1 to 6 show a first embodiment of the present invention.

  As shown in FIGS. 1 and 2, a front end module 2 is provided at the front portion of the vehicle 1. Behind the front end module 2 is formed an engine room 30 that houses the engine 3 as a prime mover, and an upper portion is covered with a bonnet cover 31. A belt 32 for driving auxiliary machines (not shown) is attached to the front side of the engine 3. The front end module 2 includes a bumper fascia 21, a bumper reinforcement 22 that reinforces the bumper fascia 21, and a heat exchange support 23 attached to the bumper reinforcement 22.

  The vehicle heat exchanging device 4A is provided in front of the engine 3 in the vehicle and is attached to a heat exchange support 23 or the like. As shown in FIGS. 3 and 4, a first refrigerant (cooling water, antifreeze liquid) is contained therein. The sub-radiator 6 (first heat exchanger) for cooling the electric drive unit 5 and the second refrigerant (air-conditioning refrigerant) flow inside to cool the vehicle interior, that is, the air conditioner Water-cooled condenser 7 (second heat exchanger).

    The vehicle heat exchanger 4A includes a main radiator 8 for cooling the engine 3 and an air-cooled condenser 9 which is another condenser for the air conditioner.

  The water-cooled condenser 7 and the air-cooled condenser 9 are connected in series in the refrigeration cycle with the water-cooled condenser 7 upstream. The second refrigerant that has been brought to high temperature and high pressure by the compressor first flows into the water-cooled condenser 7 and then flows into the air-cooled condenser 9.

  The sub-radiator 6 is disposed on the upstream surface side of the cooling air of the main radiator 8 and in the upper half region. The sub-radiator 6 mainly includes a core portion in which tubes 61 and outer fins 62 are alternately stacked, and a pair of tank portions 63 and 64 fixed to both ends of the core portion.

  The air-cooled condenser 9 is arranged on the upstream surface side of the cooling air of the main radiator 8 and in the lower half region. The air-cooled capacitor 9 is mainly composed of a core portion in which tubes 91 and outer fins 92 are alternately stacked, and a pair of tank portions 93 and 94 fixed to both ends of the core portion.

  The main radiator 8 is mainly composed of a core portion in which tubes (not shown) and outer fins (not shown) are alternately stacked, and a pair of tank portions 83 and 84 fixed to both ends of the core portion. Has been. Then, heat exchange is performed between the first refrigerant that flows in the tubes (not shown), 61, 91 and the cooling air that flows outside the tubes (not shown), 61, 91, to thereby achieve the first. The refrigerant is cooled.

  Next, the water-cooled capacitor 7 will be described. The water-cooled condenser 7 is disposed in the outlet side tank portion 64 of the sub radiator 6. The water-cooled condenser 7 has a plurality of tubes (not shown) arranged in parallel at intervals. Refrigerant inlet / outlet communication holes communicating with each other are provided at both end positions in the tube. The refrigerant flows in and out of the tube through the pair of refrigerant inlet / outlet communication holes.

  In the water-cooled condenser 7 configured as described above, heat exchange is performed between the second refrigerant flowing in the condenser 7 and the first refrigerant flowing in the tank of the condenser 7, thereby cooling the second refrigerant.

  Further, as shown in FIGS. 5 and 6, a pressure release valve 65 that opens the interior to the atmosphere when the internal pressure of the tank unit 64 exceeds a specified pressure is provided in the opening 64 a of the upper portion of the tank unit 64 of the sub-radiator 6. Provided. A first regulating wall 66 as a flow path regulating unit is provided inside the tank unit 64 and immediately below the opening 64a. The first restricting wall 66 is disposed at an interval with respect to the opening 64a, and narrows the refrigerant flow path to the opening 64a of the tank portion 64.

  With the above configuration, when the water-cooled condenser 7 is damaged and leaks into the tank portion 64 of the sub-radiator 6 and the internal pressure of the tank portion 64 exceeds the specified pressure, the pressure relief valve 65 causes the inside of the tank portion 64 to be atmospheric. The first refrigerant and the second refrigerant in the tank part 64 are directed to the opening 64a of the tank part 64 through the refrigerant flow path between the upper part of the tank part 64 and the first restriction wall 66. Here, the gas-phase refrigerant of the first refrigerant and the second refrigerant is ejected from the pressure release valve 65 to the outside without being largely restricted by the first restriction wall 66 and the protrusion 66a. Since the liquid refrigerant (including oil) in the second refrigerant cannot flow smoothly by the first regulating wall 66 and the protrusion 66a, the pressure in the tank portion 64 is released mainly by the ejection of the gas-phase refrigerant. The

  As described above, in the first embodiment, when the internal pressure of the tank unit 64 exceeds the specified pressure, the pressure release valve 65 opens the inside of the tank unit 64 to the atmosphere, and the internal pressure of the tank unit 64 decreases. Thus, it is possible to prevent the sub radiator 6 and the like from being damaged and the refrigerant from being ejected into the engine room 30 of the vehicle 1. Further, the liquid phase refrigerant composed of the coolant of the first refrigerant and the oil contained in the second refrigerant are not injected from the pressure release valve 65 as much as possible due to the restriction of the first restriction wall 66 and the protrusion 66a, so that the refrigerant is contained in the engine room 30. Can be prevented as much as possible from problems with the engine 3 and the belt 32.

(Second Embodiment)
7 and 8 show a second embodiment of the present invention. In the vehicle heat exchanging device 4B according to the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, the description thereof is omitted, and only different components are described. .

  As shown in FIGS. 7 and 8, the vehicle heat exchanging device 4 </ b> B according to the present embodiment is provided with respect to the opening 64 a of the tank portion 64 as a flow passage regulating portion that narrows the refrigerant flow passage to the opening 64 a of the tank portion 64. The first restriction walls 66 are spaced apart from each other, and second restriction walls 68a to 68d that are substantially orthogonal to the first restriction walls 66 and form labyrinth flow paths 67a and 67b.

  The second regulating walls 68a and 68b forming one labyrinth channel 67a protrude from the inner wall above the tank portion 64 and the first regulating wall 66, respectively, and are arranged adjacent to each other with a slight gap therebetween. Similarly, the second restricting walls 68c and 68d forming the other labyrinth flow path 67b protrude from the first restricting wall 66 and the inner wall above the tank portion 64, respectively, and are arranged adjacent to each other with a slight gap therebetween. Yes.

  Since other configurations are the same as those of the first embodiment, the description will be omitted to avoid redundant description. The same components in the drawings are denoted by the same reference numerals for clarification.

  Also in the second embodiment, as in the first embodiment, when the water-cooled condenser 7 is damaged, it leaks into the tank part 64 of the sub-radiator 6 and the pressure in the tank part 64 increases. The pressure release valve 65 is opened, and the first refrigerant and the second refrigerant in the tank part 64 go to the opening 64a of the tank part 64 through the labyrinth flow paths 67a and 67b formed by the second restriction walls 68a to 68d. . Here, the gas-phase refrigerant of the first refrigerant and the second refrigerant is ejected from the pressure release valve 65 to the outside without being largely restricted by the first restriction wall 66 and the second restriction walls 68a to 68d. The liquid-phase refrigerant (including oil) of the first refrigerant and the second refrigerant cannot flow smoothly by the first restriction wall 66 and the second restriction walls 68a to 68d. As a result, the pressure in the tank part 64 is released.

  As described above, also in the second embodiment, when the internal pressure of the tank part 64 exceeds the specified pressure, the pressure release valve 65 opens the inside of the tank part 64 to the atmosphere, and the internal pressure of the tank part 64 decreases. Thus, it is possible to prevent the sub radiator 6 and the like from being damaged and the refrigerant from being ejected into the engine room 30 of the vehicle 1. In addition, the liquid phase refrigerant composed of the coolant of the first refrigerant and the oil contained in the second refrigerant are not injected from the pressure release valve 65 as much as possible due to the restriction of the first restriction wall 66 and the second restriction walls 68a to 68d. Can be prevented as much as possible from being applied to devices such as the engine 3 and the belt 32 in the engine room 30.

(Third embodiment)
9 and 10 show a third embodiment of the present invention. In the vehicle heat exchanging device 4C according to the third embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different components are described. .

  As shown in FIGS. 9 and 10, the vehicle heat exchanging device 4 </ b> C according to the present embodiment serves as a flow restriction member that narrows the refrigerant flow passage to the opening 64 a of the tank portion 64. It has a regulating wall 68e and a stopper wall 68f. The first restricting wall 66 is disposed at an interval with respect to the opening 64a of the tank portion 64, and is connected to the tank portion 64 via a fragile portion 66b on the root side. The second restriction wall 68e is fixed to the first restriction wall 66 and protrudes toward the opening 64a of the tank portion 64. The stopper wall 68f protrudes from the second restriction wall 68e. When the weak part 66b on the base side of the first restriction wall 66 is deformed and the second restriction wall 68e is displaced toward the opening 64a of the tank part 64, the second wall 68f is formed. The excessive displacement of the regulating wall 68e is prevented.

  Since other configurations are the same as those of the first embodiment, the description will be omitted to avoid redundant description. The same components in the drawings are denoted by the same reference numerals for clarification.

  Also in the third embodiment, as in the first embodiment, the pressure leaks into the tank portion 64 of the sub-radiator 6 to increase the pressure in the tank portion 64 and the pressure release valve 65 is opened. The first refrigerant and the second refrigerant in 64 pass toward the opening 64a of the tank part 64 through the refrigerant flow path between the upper part of the tank part 64 and the second restriction wall 68e. At this time, since the first restriction wall 66 is biased toward the opening 64a of the tank portion 46 by the pressure of the refrigerant, the fragile portion 66b on the base side of the first restriction wall 66 is deformed as shown in FIG. The second restricting wall 68e is displaced toward the opening 64a of the tank portion 46, and the stopper wall 68f abuts against the inner wall of the tank portion 46, thereby preventing the second restricting wall 68e from being displaced. Here, the gas-phase refrigerant in the first refrigerant and the second refrigerant is ejected from the pressure release valve 65 to the outside without being largely restricted by the first restriction wall 66 and the second restriction wall 68e. Since the liquid refrigerant (including oil) in the first refrigerant and the second refrigerant cannot flow smoothly by the first restriction wall 66 and the second restriction wall 68e, the tank portion 64 is mainly caused by the ejection of the gas-phase refrigerant. The pressure inside is released.

  As described above, also in the third embodiment, when the internal pressure of the tank portion 64 exceeds the specified pressure, the pressure release valve 65 opens the inside of the tank portion 64 to the atmosphere, and the internal pressure of the tank portion 64 decreases. Thus, it is possible to prevent the sub radiator 6 and the like from being damaged and the refrigerant from being ejected into the engine room 30 of the vehicle 1. In addition, the liquid phase refrigerant composed of the coolant of the first refrigerant and the oil contained in the second refrigerant are not injected from the pressure release valve 65 as much as possible due to the restriction of the first restriction wall 66 and the second restriction wall 68e. Problems caused by being applied to devices such as the engine 3 and the belt 32 in the room 30 can be prevented as much as possible.

(Modification of the third embodiment)
In the third embodiment, the case where the stopper wall 68f that prevents excessive displacement of the second restriction wall 68e is provided on the second restriction wall 68e is shown, but the stopper wall may be provided on the inner wall of the tank portion. .

(Fourth embodiment)
11 and 12 show a fourth embodiment of the present invention. In the vehicle heat exchanging device 4D according to the fourth embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different components are described. .

  As shown in FIGS. 11 and 12, in the vehicle heat exchanging device 4 </ b> D of this embodiment, the pressure release valve 65 is provided in a cap 69 that is mounted in the refrigerant hole 64 b in the upper portion of the tank portion 64 of the sub-radiator 6. . The refrigerant hole 64b is provided for injecting the first refrigerant (coolant) into the cooling water cycle for cooling the electric drive unit 5 and the like, and the tank of the sub radiator 6 is formed by the refrigerant hole 64b. An opening at the top of the portion 64 is formed.

  Other configurations are the same as those of the first embodiment including the configuration of the flow path restricting portion, and thus the description thereof is omitted to avoid redundant description. The same components in the drawings are denoted by the same reference numerals for clarification.

  Even in the fourth embodiment, the same effect as in the first embodiment can be obtained. Furthermore, in the fourth embodiment, the pressure release valve 65 is provided in the cap 69 attached to the refrigerant hole 64b in the upper part of the tank part 64 of the sub-radiator 6, so that the tank part 64 of the sub-radiator 6 is processed. In particular, the pressure release valve 65 can be provided in the tank portion 64 of the sub-radiator 6 and the cost can be reduced.

  Further, in the fourth embodiment, the configuration of the flow path regulating unit may be the one of the second or third embodiment.

4A-4D Heat exchanger for vehicles 6 Sub-radiator (first heat exchanger)
7 Water-cooled condenser (second heat exchanger)
64 Tank part 64a Opening 64b Refrigerant hole (opening)
65 Pressure release valve 66 First restriction wall (flow path restriction part)
66b Weak part 67a, 67b Labyrinth flow path 68a-68e 2nd control wall (flow path control part)
68f Stopper wall (flow path restricting part)
69 cap

Claims (3)

A first heat exchanger (6) through which the first refrigerant flows;
The second heat that is housed in the tank part (64) of the first heat exchanger (6), in which the high-pressure second refrigerant of the refrigeration cycle flows, and performs heat exchange between the second refrigerant and the first refrigerant. A vehicle heat exchange device (4C) comprising an exchanger (7),
A pressure release valve (65) provided in the upper opening (64a) of the tank portion (64) of the first heat exchanger (6), and opening the interior to the atmosphere when the internal pressure exceeds a specified pressure;
A flow path regulating portion that is provided inside the tank portion (64) and narrows the refrigerant flow path to the opening (64a) of the tank portion (64) to which the pressure release valve (65) is connected. ,
The flow path restricting portion includes a first restricting wall (66) disposed at an interval with respect to the opening (64a) of the tank portion (64),
A second restriction wall (68e) fixed to the first restriction wall (66) and protruding toward the opening (64a) of the tank portion (64);
The second restricting wall (68e) and the inner wall of the tank part (64) are protruded and the second restricting wall (68e) is displaced toward the opening (64a) of the tank part (64). Then, the vehicle heat exchange device (4C) is provided with a stopper wall (68f) for preventing displacement of the second restriction wall (68e ) . The vehicle heat exchange device (4C) according to claim 1,
Before Symbol first limiting wall (66), the heat exchange device for a vehicle according to claim Rukoto that Yusuke fragile portion (66b) (4C). The vehicle heat exchange device (4D) according to claim 1 or 2 ,
The vehicle heat exchange characterized in that the pressure release valve is provided in a cap (69) attached to the refrigerant hole (64b) of the tank portion (64) of the first heat exchanger (6). Device (4D).

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