JP2012145311A - Vehicle air conditioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve miniaturization and improve productivity of a heat exchanger for heating, which includes a first heat core for exchanging heat between first liquid and blowing air to inside a vehicle cabin, and a second heat core for exchanging heat between second liquid, which has a high temperature and small flow rate than that of the first liquid, and blowing air heated by the first heat core.SOLUTION: The first heat core 10 and the second heat core 20 of the heat exchanger 2 for heating include a plurality of accumulated flat tubes 11 and 21, and inlet side tanks 12 and 22 to become cooling water inlet sides communicating to one sides in longitudinal directions of a plurality of tubes 11 and 21. At this point, the inlet side tanks 12 and 22 of the first heat core 10 and the second heat core 20 are integrated as a structure for dividing inside of one inlet side tank 50 into two by a partition wall 51. Furthermore, tubes 11 and 21 are integrated as well as fins 14 and 24 are integrated in the first heat core 10 and the second heat core 20.

Description

  The present invention relates to a vehicle air conditioner including a heating heat exchanger that heats air blown into a passenger compartment.

  There exists a thing of patent documents 1, 2 as such a vehicle air conditioner.

  In the thing of patent document 1, there exist a cylinder head side flow path which cools a cylinder head as a cooling water flow path inside an engine, and a cylinder block side flow path which cools a cylinder block, and it passed the cylinder head side flow path. The cooling water is configured to flow into one heating heat exchanger.

  Moreover, in the thing of patent document 2, two heat exchangers for heating for heating air are provided, the cooling water flowing out from one cooling water outlet provided in the engine is divided, and each heating is performed. Is flowing into the heat exchanger.

US Pat. No. 5,337,704 European Patent Application No. 1008471

  By the way, in recent years, there is a demand for an engine mounted on a vehicle to ensure a required output and to make it smaller than before. In order to realize this, knocking may occur when the compression ratio is increased or when the supercharging pressure is increased in an engine with a supercharger. Therefore, it is necessary to improve anti-knocking performance. Therefore, it is conceivable to positively cool the cylinder head in order to improve the knocking resistance.

  However, the cylinder block needs to be maintained at a predetermined temperature or higher in order to suppress an increase in friction inside the engine. Therefore, a cylinder head side flow path and a cylinder block side flow path are provided as cooling water flow paths inside the engine, and the cooling water flow rate of the cylinder head side flow path is made larger than the cooling water flow rate of the cylinder block side flow path. It is possible.

  However, in this case, the cooling water temperature after cooling the cylinder head becomes lower than the minimum temperature required for heating, and as in the technique described in Patent Document 1, only the cooling water that has cooled the cylinder head is used as a heat source. When the air blown into the room is heated, there arises a problem that the air temperature cannot be raised sufficiently. Incidentally, conventionally, the cooling water temperature after cooling the cylinder head is about 80 to 90 ° C., which exceeds the minimum temperature required for heating, and thus such a problem does not occur.

  Therefore, as a heat exchanger for heating, the first heat exchange unit that exchanges heat between the cooling water that has cooled the cylinder head and the blown air, and the blown air that is heated by the cooling water that has cooled the cylinder block and the first heat exchange unit And a second heat exchanging part that exchanges heat with each other.

  According to this, in the first heat exchanging unit, the cooling air that has cooled the cylinder block is used as a heat source, and the blown air is heated, and then in the second heat exchanging unit, the cylinder that is hotter than the cooling water after cooling the cylinder head Since the blown air heated by the first heat exchange unit is further heated using the cooling water after block cooling as a heat source, the air temperature after passing through the heating heat exchanger can be sufficiently increased.

  By the way, as a structure of such a heat exchanger for heating, the 1st, 2nd heat exchange part is comprised using the part of the existing heater core (mass product), and the 1st, 2nd comprised separately. It is conceivable to employ a configuration in which the heat exchange units are arranged in two rows. However, when the separate heater cores are arranged in two rows in this way, the heat exchanger for heating is enlarged, and parts for two heater cores are required, resulting in poor productivity.

  Such a problem is not limited to the case where the first heat exchange unit uses the cooling water after cooling the cylinder head as a heat source, and the second heat exchange unit uses the cooling water after cooling the cylinder block as a heat source. This is a problem that occurs when the exchange unit uses the first liquid as the heat source, and the second heat exchange unit uses the second liquid having a higher temperature and a lower flow rate than the first liquid as the heat source.

  In view of the above, the present invention provides a heat exchanger for heating in which the first heat exchange unit uses the first liquid as a heat source, and the second heat exchange unit uses the second liquid having a higher temperature and a lower flow rate than the first liquid as the heat source. The purpose is to reduce the size of the heat exchanger for heating. Another object is to improve the productivity of such a heat exchanger for heating.

In order to achieve the above object, according to the first aspect of the present invention, the heating heat for heating the blown air into the vehicle interior using the first liquid and the second liquid having a higher temperature and a lower flow rate than the first liquid as heat sources. With an exchange (2)
The heating heat exchanger (2) includes a first heat exchange section (10) for exchanging heat between the first liquid and the blown air, and a blown air heated by the second liquid and the first heat exchange section (10). A second heat exchange part (20) for exchanging heat,
The first and second heat exchange sections (10, 20) are both in communication with the stacked tubes (11, 21) and one end side in the longitudinal direction of the plurality of tubes (11, 21), and are on the liquid inlet side. An inlet side tank portion (12, 22) that is to be connected to the other end in the longitudinal direction of the plurality of tubes (11, 21), and an outlet side tank portion (13, 23) to be a liquid outlet side,
The inlet side tank part (12) of the first heat exchange part (10) and the inlet side tank part (22) of the second heat exchange part (20) are divided into a partition wall (51 ), It is characterized by being integrated as a structure divided into two.

  According to this, since the inlet side tank part (12) of the first heat exchange part (10) and the inlet side tank part (22) of the second heat exchange part (20) are integrated, the two inlet side tanks The heat exchanger for heating can be reduced in size compared with the case where the parts are configured separately and separated.

  Moreover, according to this, since it is set as the structure which divides the inside of one tank part (50) into two with a partition wall (51), compared with the case where the two inlet side tank parts are made into a different body, Since the number of parts of the inlet side tank part of the 1st and 2nd heat exchange part can be reduced, productivity improves.

Further, in the invention described in claim 2, in the invention described in claim 1, the first and second heat exchange sections (10, 20) are both provided on the outer surfaces of the plurality of tubes (11, 21). Fins (14, 24) for heat transfer enhancement,
The fins (14) of the first heat exchange unit (10) and the fins (24) of the second heat exchange unit (20) are integrated.

  According to this, compared with the case where the fins of the first and second heat exchange parts are separate bodies, the number of parts can be reduced, and productivity is improved.

In the invention according to claim 3, the heat exchanger (2) for heating that heats the air blown into the vehicle interior by using the first liquid and the second liquid having a higher temperature and a lower flow rate than the first liquid as a heat source. With
The heating heat exchanger (2) includes a first heat exchange section (10) for exchanging heat between the first liquid and the blown air, and a blown air heated by the second liquid and the first heat exchange section (10). A second heat exchange part (20) for exchanging heat,
The first and second heat exchange sections (10, 20) are both in communication with the stacked tubes (11, 21) and one end side in the longitudinal direction of the plurality of tubes (11, 21), and are on the liquid inlet side. An inlet side tank portion (12, 22) that is to communicate with the other end in the longitudinal direction of the plurality of tubes (11, 21), and an outlet side tank portion (13, 23) that is a liquid outlet side, and a plurality of tubes (11, 21) provided on the outer surface of the fins (14, 24) for heat transfer promotion,
The fins (14) of the first heat exchange unit (10) and the fins (24) of the second heat exchange unit (20) are integrated.

  According to this, since the number of parts can be reduced compared with the case where the fins of the first and second heat exchanging parts are separate bodies, the object of improving productivity can be achieved.

  Moreover, in invention of Claim 4, in invention of Claims 1-3, the tube (11) of the 1st heat exchange part (10) and the tube (21) of the 2nd heat exchange part (20) Is characterized by being integrated.

  According to this, since the tubes of the first and second heat exchange units are integrated, the first and second heat exchanges are compared with the case where the tubes of the first and second heat exchange units are separated. The space between the parts can be narrowed, the heat exchanger for heating can be miniaturized, and the number of parts can be reduced, so that productivity is improved.

The invention according to claim 5 includes a heat exchanger (2) for heating that heats the air blown into the vehicle interior using the first liquid and the second liquid having a higher temperature and a lower flow rate than the first liquid as heat sources. ,
The heating heat exchanger (2) includes a first heat exchange section (10) for exchanging heat between the first liquid and the blown air, and a blown air heated by the second liquid and the first heat exchange section (10). A second heat exchange part (20) for exchanging heat,
The first and second heat exchange sections (10, 20) are both in communication with the stacked tubes (11, 21) and one end side in the longitudinal direction of the plurality of tubes (11, 21), and are on the liquid inlet side. An inlet side tank portion (12, 22) that is to be connected to the other end in the longitudinal direction of the plurality of tubes (11, 21), and an outlet side tank portion (13, 23) to be a liquid outlet side,
The tube (11) of the first heat exchange part (10) and the tube (21) of the second heat exchange part (20) are integrated.

  According to this, since the tubes of the first and second heat exchanging parts are integrated, the first and second heat exchanging parts are compared with the case where the tubes of the first and second heat exchanging parts are separated as separate bodies. The space | interval of 2 heat exchange parts can be narrowed, and the heat exchanger for heating can be reduced in size.

  Furthermore, according to this, since the number of parts can be reduced as compared with the case where the tubes of the first and second heat exchange parts are separate bodies, the object of improving productivity can be achieved.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

It is a schematic block diagram of the vehicle air conditioner in 1st Embodiment. It is a front view of the heat exchanger 2 for a heating in FIG. It is a side view of the heat exchanger 2 for a heating in FIG. It is the IV-IV sectional view taken on the line in FIG. It is the VV sectional view taken on the line in FIG. It is a side view of the heat exchanger 2 for heating in 2nd Embodiment. It is the VII-VII sectional view taken on the line in FIG. It is a side view of the heat exchanger 2 for heating in 3rd Embodiment. It is the IX-IX sectional view taken on the line in FIG. It is a transverse cross section of common tube 80 of the 1st and 2nd heater core in a 3rd embodiment. It is a transverse cross section of common tube 80 of the 1st and 2nd heater core in a 3rd embodiment. It is a transverse cross section of entrance side tank parts 12 and 22 of the 1st and 2nd heater core in a 3rd embodiment. It is an A1 arrow line view of the partition wall 51 in FIG. It is a side view of the heat exchanger 2 for heating in 4th Embodiment. It is a side view of the heat exchanger 2 for heating in 5th Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, parts that are the same or equivalent to each other are given the same reference numerals in the drawings in order to simplify the description.

(First embodiment)
FIG. 1 shows a schematic configuration of a vehicle air conditioner in the present embodiment. The vehicle air conditioner of the present embodiment is mounted on a hybrid vehicle or the like that obtains driving force for vehicle traveling from an engine (internal combustion engine) and a traveling electric motor.

  The vehicle air conditioner 1 according to the present embodiment includes a heating heat exchanger 2 that heats the air blown into the vehicle interior by exchanging heat between the cooling water of the engine 30 and the air blown into the vehicle interior. . The cooling water is water or water containing additive components.

  The heat exchanger 2 for heating has the 1st heater core 10 and the 2nd heater core 20, and both are integrated. The 1st heater core 10 and the 2nd heater core 20 are equivalent to the 1st heat exchange part and the 2nd heat exchange part of the heat exchanger for heating in the present invention, respectively.

  Cooling water that has cooled the cylinder head 31 of the engine 30 flows into the first heater core 10, and cooling water that has cooled the cylinder block 32 of the engine 30 flows into the second heater core 20. The first heater core 10 is located on the upstream side of the air flow, and the second heater core 20 is located on the downstream side of the air flow.

  Here, in the engine 30, the cylinder block 32 is a block body that constitutes a cylinder bore (columnar hole) in which a piston reciprocates. The cylinder head 31 is a block body that closes the top dead center side opening of the cylinder bore and constitutes a combustion chamber.

  A first cooling water inlet 31 a and a first cooling water outlet 31 b as a first outlet portion are provided on the cylinder head 31 side of the engine 30, and cooling water for cooling the cylinder head 31 flows inside the cylinder head 31. A cooling water passage on the cylinder head side is formed. The cooling water flowing in from the first cooling water inlet 31a flows through the cylinder head 31 and then flows out from the first cooling water outlet 31b.

  Similarly, a second cooling water inlet 32 a and a second cooling water outlet 32 b as a second outlet are provided on the cylinder block 32 side of the engine 30, and cooling for cooling the cylinder block 32 is provided inside the cylinder block 32. A cooling water passage on the cylinder block side through which water flows is formed. The cooling water flowing in from the second cooling water inlet 32a flows through the cylinder block 32 and then flows out from the second cooling water outlet 32b. Thus, in this embodiment, the cooling water which cooled the cylinder block 32 flows out from the 2nd cooling water exit 32b, without joining the cooling water which cooled the cylinder head 31. FIG.

  Thus, the engine 30 of this embodiment has two cooling systems. During steady operation of the engine 30, the cooling water flow rate in the cooling water flow path on the cylinder head side is made larger than the cooling water flow rate in the cooling water flow path on the cylinder block side so that the cylinder head 31 is more positive than the cylinder block 32. It is designed to cool down. This is because the anti-knock performance is improved by lowering the temperature of the cylinder head 31, and the low viscosity of the engine oil is maintained by maintaining the cylinder block 32 at a high temperature, thereby increasing the friction inside the engine. It is for suppressing.

  In the heat exchanger 2 for heating, the cooling water inlet 10a of the first heater core 10 is connected to a first cooling water outlet 31b on the cylinder head 31 side of the engine 30 via a pipe, and the first cooling water outlet The cooling water flowing out from 31 b flows into the first heater core 10. On the other hand, the cooling water inlet 20a of the second heater core 20 is connected to a second cooling water outlet 32b on the cylinder block 32 side of the engine 30 via a pipe, and the cooling water flowing out from the second cooling water outlet 32b It flows into the second heater core 20.

  Therefore, in this embodiment, low temperature and large flow rate cooling water flows into the first heater core 10, and high temperature and small flow rate cooling water flows into the second heater core 20. Specifically, the temperature and flow rate of the cooling water flowing into the first heater core 10 are in the range of 30 to 60 ° C. and 5 to 15 L / min, and the temperature and flow rate of the cooling water flowing into the second heater core 20 are It is the range of 40-90 degreeC and 0.2-3 L / min.

  As will be described later, each of the first heater core 10 and the second heater core 20 has an independent heat exchange core portion. Therefore, the cooling water flowing into the first heater core 10 exchanges heat with air at the heat exchange core portion of the first heater core 10 without being mixed with the cooling water flowing into the second heater core 20. Similarly, the cooling water flowing into the second heater core 20 exchanges heat with air at the heat exchange core portion of the second heater core 20 without being mixed with the cooling water flowing into the first heater core 10. And the cooling water which passed each heat exchange core part flows out from the common cooling water exit 2b provided in the heat exchanger 2 for heating, after joining.

  The cooling water flowing out from the cooling water outlet 2b of the heat exchanger 2 for heating branches at the branching portion 41 and flows into the first cooling water inlet 31a and the second cooling water outlet 32a of the engine 30, respectively.

  Further, as shown in FIG. 1, the water pump 42 is disposed in the middle of the cooling water flow path between the cooling water outlet 2 b of the heating heat exchanger 2 and the branch portion 41. The water pump 42 is an adjusting unit that forms a cooling water flow and adjusts the cooling water flow rate. The water pump 42 is a mechanical or electric pump, and controls the coolant flow rate by controlling the rotation speed by a control device (not shown).

  The engine 30 communicates with a radiator (not shown), and the cooling water flowing out from the cylinder head 31 radiates heat with the radiator, and the cooling water after heat radiation can flow into the cylinder head 32 and the cooling water flowing out from the cylinder block 32. Radiates heat with the radiator, and the cooling water after heat radiation can flow into the cylinder block 32.

  Next, the heating heat exchanger 2 will be described in detail. FIG. 2 shows a front view of the heating heat exchanger 2 as viewed from the air flow direction, and FIG. 3 shows a side view of the heating heat exchanger 2. The up and down arrows in the figure indicate the up and down direction parallel to the direction of gravity when mounted on the vehicle, and the same applies to other figures. Further, the vehicle at this time is located on a horizontal surface, not an inclined surface.

  As shown in FIGS. 2 and 3, the first and second heater cores 10 and 20 of the heating heat exchanger 2 are both laminated with a plurality of flat tubes 11 and 21 and a plurality of tubes 11 and 20. 21 is connected to one end side in the longitudinal direction, and is connected to the inlet side tank portions 12 and 22 that are the cooling water inlet side, and the other end side in the longitudinal direction of the plurality of tubes 11 and 21, and is the outlet side that is the cooling water outlet side. Tank portions 13 and 23 are provided.

  The heat exchanger 2 for heating is housed in an air conditioning case (not shown) together with a blower (not shown) that forms blown air toward the passenger compartment, and is mounted on the vehicle. Specifically, in the heat exchanger 2 for heating, the second heater core 20 is positioned on the downstream side of the air flow from the first heater core 10, and the inlet side tank portions 12 and 22 of the first and second heater cores 10 and 20. Is located on the lower side, the outlet side tank portions 13 and 23 of the first and second heater cores 10 and 20 are located on the upper side, and the longitudinal direction of the tubes 11 and 21 is parallel to the vertical direction. Mounted on the vehicle.

  The first heater core 10 and the second heater core 20 have the same size in the left-right and up-down directions when viewed in the air flow direction. Thereby, all of the air after passing through the first heater core 10 passes through the second heater core 20.

  In both the first and second heater cores 10 and 20, the plurality of tubes 11 and 21 extend in one direction (vertical direction) and are arranged in a line in the vehicle left-right direction, which is a direction perpendicular to the one direction. Are stacked. The inlet side tank parts 12 and 22 and the outlet side tank parts 13 and 23 are elongated in the stacking direction of the tubes 11 and 21. Therefore, the vehicle left-right direction corresponds to the stacking direction of the tubes 11, 21 and the longitudinal direction of the inlet-side tank portions 12, 22.

  Further, the first and second heater cores 10 and 20 include corrugated fins 14 and 24 that are joined to the outer surfaces of the tubes 11 and 21 to promote heat transfer. In the first and second heater cores 10 and 20, the first and second heat exchange core portions 15 and 25 of the all-pass type, that is, the unidirectional flow type, are formed by the laminated structure of the tubes 11 and 21 and the fins 14 and 24, respectively. Is configured.

  Therefore, in the 1st, 2nd heat exchange core parts 15 and 25, the cooling water which flowed into entrance side tank parts 12 and 22 is distributed to a plurality of tubes 11 and 21, respectively, and inside a plurality of tubes 11 and 21 is carried out. Cooling water flows from bottom to top.

  Here, FIG. 4 shows a cross-sectional view taken along line IV-IV in FIG. As shown in FIG. 4, in the present embodiment, the tube 11 of the first heater core 10 and the tube 21 of the second heater core 20 are separate from each other and are spaced apart so as to sandwich a space. . Similarly, the fins 14 of the first heater core 10 and the fins 24 of the second heater core 20 are separate from each other and are spaced apart so as to sandwich the space. And the tube 11 of the 1st heater core 10 and the tube 21 of the 2nd heater core 20 have the same width | variety in an air flow direction, and both flow-path cross-sectional area is the same.

  As shown in FIG. 3, the inlet side tank portions 12 and 22 of the first and second heater cores 10 and 20 are integrated, and the inside of one inlet side tank 50 is divided into two by a partition wall 51. It consists of partitioning.

  Here, FIG. 5 shows a cross-sectional view taken along line VV in FIG. FIG. 5 is a cross-sectional view of the inlet side tank portions 12 and 22 of the first and second heater cores 10 and 20. As shown in FIG. 5, the inlet side tank portions 12, 22 of the first and second heater cores 10, 20 are specifically tank interiors formed by a common tank body member 52 and a common core plate 53. The space is configured by dividing the space into a space on the first heater core 10 side and a space on the second heater core 20 side by a partition wall 51. A common tank body member 52 that mainly constitutes a tank internal space, a common core plate 53 into which a plurality of tubes are inserted, and a partition wall 51 are made of metal such as aluminum and brazed. Yes.

  As shown in FIGS. 2 and 3, cooling water inlets 10 a and 20 a are provided in the inlet side tank portions 12 and 22 of the first and second heater cores 10 and 20, respectively. These cooling water inlets 10a and 20a are disposed on one end side in the vehicle left-right direction (left-right direction in FIG. 2) of the inlet-side tank portions 12 and 22.

  The outlet side tank portions 13 and 23 of the first and second heater cores 10 and 20 are shared by a single outlet side tank 63. The outlet side tank 63 is provided with one cooling water outlet 2b. For this reason, the cooling water that has flowed into the first heater core 10 and the cooling water that has flowed into the second heater core 20 merge inside the outlet-side tank 63, and the merged cooling water flows out from one cooling water outlet 2b. . The cooling water outlet 2b is disposed on one end side in the vehicle left-right direction, which is the same as the cooling water inlets 10a and 20a.

  As described above, in this embodiment, the outlet side tank portions of the first and second heater cores 10 and 20 are made common and the cooling water outlet 2b of the heating heat exchanger 2 is made one. You may provide an exit side tank part and a cooling water exit in each of the 2nd heater cores 10 and 20. FIG. However, this embodiment is preferable from the viewpoint of reducing the number of pipes connected between the heat exchanger 2 for heating and the engine 30 or reducing the number of water pumps described later.

  In the air conditioning case, the bypass air passage through which the blown air flows, bypassing the heating heat exchanger 2, the air after passing through the bypass air passage, and the air after passing through the heating heat exchanger 2 are mixed. An air mix door that adjusts the ratio is provided. And the air flow path through which the air after passing through the heat exchanger 2 for heating flows is connected to the foot blower outlet on the lower side, and to the defroster blower outlet and the face blower outlet on the upper side.

  Next, the operation of the vehicle air conditioner 1 of the present embodiment will be described.

  A control device (not shown) of the vehicle air conditioner 1 controls the blower so as to obtain an air flow amount corresponding to the target blown air temperature TAO during heating, and controls the air mix door so as to be in a desired position. The target blown air temperature TAO is calculated according to the air conditioning heat load determined by the set temperature and the environmental conditions, and is the target temperature of the air blown out from the outlet to the vehicle interior.

  Thereby, in the 1st heater core 10, blowing air is heated by heat exchange with the cooling water after cylinder head 31 cooling. The cooling water after cooling the cylinder head 31 actively cools the cylinder head 31, and thus is cooler than the minimum temperature required for heating, but has a larger flow rate than the cooling water after cooling the cylinder block 32. It has a lot of heat. Therefore, in the present embodiment, in order to extract as much heat as possible of the cooling water after cooling the cylinder head 31, as compared with the second heater core 20, the cooling water flow rate inside the first heater core 10 is increased, and the air and the cooling water. The heat transfer coefficient is increased. For this reason, in the 1st heater core 10, much calorie | heat amount can be supplied to ventilation air from the cooling water of the large flow volume after the cylinder head 31 cooling. As a result, the temperature of the air after passing through the first heater core 10 is close to the cooling water temperature before flowing into the first heater core 10 (the inlet water temperature of the first heater core).

  And in the 2nd heater core 20, the ventilation air after the 1st heater core 10 passage is heated by heat exchange with the cooling water after cylinder block 32 cooling. Since the cooling water after cooling the cylinder block 32 is hotter than the cooling water after cooling the cylinder head 31, the temperature of the blown air after passing through the second heater core 20 is higher than the blown air after passing through the first heater core 10. Can be raised.

  By the way, unlike this embodiment, if the air is heated using only the cooling water that has cooled the cylinder head 31 as the heat source, as in the technique described in Patent Document 1, the air temperature cannot be sufficiently increased, and the heating is not performed. Not satisfied. Further, when the cooling water after cooling the cylinder head 31 that has flowed out of the engine and the cooling water after cooling the cylinder block 32 are all mixed, the temperature of the cooling water after mixing becomes lower than the minimum temperature required for heating. For this reason, since the energy transfer efficiency from cooling water to air becomes low, even if the air is heated using the mixed cooling water as a heat source, the air temperature cannot be sufficiently increased and heating is not established.

  In contrast, in the present embodiment, the engine 30 is provided with the first cooling water outlet 31b and the second cooling water outlet 32b, and the low-temperature side cooling water after cooling the cylinder head 31 is caused to flow out from the first cooling water outlet 31b. The high-temperature side cooling water after cooling the cylinder block 32 is allowed to flow out from the second cooling water outlet 32b. Then, the low temperature side cooling water flowing out from the first cooling water outlet 31b is caused to flow into the first heater core 10 without mixing both cooling waters, and the high temperature side cooling water flowing out from the second cooling water outlet 32b is supplied to the second cooling water. It flows into the heater core 20.

  Thus, in this embodiment, since the 2nd heater core 20 heats the blowing air to the vehicle interior by using the high temperature side cooling water flowing out from the second cooling water outlet 32b as a heat source, the first cooling water outlet 31b Compared with the case where only the cooling water on the low temperature side of the outflow is used as the heat source, or the case where the mixed water obtained by mixing the low temperature side cooling water and the high temperature side cooling water is used as the heat source, the air temperature after being heated by the second heater core 20 Can be high.

  Further, in the present embodiment, after the blower air is heated with the first heater core 10 using the low-temperature side cooling water as the heat source, the heated air is heated with the second heater core 20 using the high-temperature side cooling water as the heat source. The amount of heat of both the cooling water on the low temperature side and the cooling water on the high temperature side can be used effectively.

  That is, according to the present embodiment, the air blown into the vehicle interior is heated with one heater core using a mixture of the entire cooling water flowing out from both the first and second cooling water outlet portions 31b and 32b as a heat source. Compared with the case, the energy transmission efficiency from the cooling water to the air in the whole cooling water in the heater core can be increased. As a result, even when the amount of air blown by the blower is large, the air can be raised to a sufficiently high temperature, and heating can be established.

  Next, main features of the vehicle air conditioner 1 of the present embodiment will be described.

  As the configuration of the heat exchanger 2 for heating, all of the first and second heater cores 10 and 20 are configured using parts of existing heater cores (mass-produced products), and the first and second heater cores are configured separately. In the configuration in which 10 and 20 are arranged in two rows, since conventional parts can be used, there is an advantage that fewer new parts are required.

  However, since the overall size of the heat exchanger 2 for heating is determined by the dimensions of the conventional parts and the distance between the heater cores, the dimensions of the conventional parts are limited, and the heat exchanger 2 for heating cannot be reduced in size.

  On the other hand, in the present embodiment, the components of the inlet side tank portions 12 and 22 are newly designed, and the inside of one inlet side tank 50 is divided into two by the partition wall 51. 2 The inlet side tank portions 12 and 22 of the heater cores 10 and 20 are integrated.

  Thereby, according to this embodiment, compared with the case where the two inlet side tank parts 12 and 22 are constituted as separate bodies and separated, the distance between the first and second heater cores 10 and 20 is narrowed. Therefore, the heating heat exchanger 2 can be reduced in size.

  As a result, according to the present embodiment, it is possible to reduce the size of the air conditioning case in which the heating heat exchanger 2 is mounted by downsizing the entire heat exchanger 2 for heating, and to reduce the mounting space of the air conditioning case in the vehicle. As a result, vehicle mountability is improved.

  Further, according to this embodiment, the inlet side tank portions 12 and 22 of the first and second heater cores 10 and 20 are integrated as a structure in which the inside of one inlet side tank 50 is divided into two by the partition wall 51. Therefore, compared with the case where the inlet side tank portions 12 and 22 of the first and second heater cores 10 and 20 are configured as separate bodies, the necessary amount of components can be reduced, so that the heat exchanger 2 for heating is lightweight. Can be

  Incidentally, unlike the present embodiment, the heat exchange for heating can be performed by making the inlet side tank parts 12 and 22 of the first and second heater cores 10 and 20 into one common tank like the outlet side tank parts 13 and 23. The device 2 can be downsized. However, in this embodiment, as described above, in order to flow cooling water having different temperatures through the tubes 11 and 21 of the first and second heater cores 10 and 20, the inside of one inlet side tank 50 is divided into two by the partition wall 51. The structure is divided into two.

  Further, according to this embodiment, the inlet side tank portions 12 and 22 of the first and second heater cores 10 and 20 are integrated as a structure in which the inside of one inlet side tank 50 is divided into two by the partition wall 51. Therefore, compared with the case where the inlet side tank portions 12 and 22 of the first and second heater cores 10 and 20 are separated, the number of parts of the first and second heater cores 10 and 20 can be reduced, and the assembly man-hour can be reduced. Therefore, productivity can be improved and manufacturing costs can be reduced.

  Moreover, when the inlet side tank parts 12 and 22 of the 1st, 2nd heater cores 10 and 20 are comprised as a different body, it will radiate wastefully from the inlet side tank part 22 of the 2nd heater core 20 to the exterior. On the other hand, according to the present embodiment, since the inlet side tank portions 12 and 22 of the first and second heater cores 10 and 20 are integrated, the waste from the inlet side tank portion 22 of the second heater core 20 is wasted. The heat for heat radiation can be effectively used by moving to the cooling water in the inlet tank portion 12 of the first heater core 10.

  Moreover, when the 1st, 2nd heater cores 10 and 20 are comprised separately, when assembling | attaching to an air-conditioning case, it is necessary to mount a heater core in an air-conditioning case twice. On the other hand, according to this embodiment, since the 1st, 2nd heater cores 10 and 20 are integrated, since what is necessary is just to mount once in an air-conditioning case, the mounting property to an air-conditioning case improves.

(Second Embodiment)
FIG. 6 shows a side view of the heating heat exchanger 2 in the present embodiment, and FIG. 7 shows a sectional view taken along line VII-VII in FIG. In the present embodiment, the fin 14 of the first heater core 10 and the fin 24 of the second heater core 20 are further integrated in the air flow direction with respect to the heating heat exchanger 2 described in the first embodiment. is there. Other configurations are the same as those in the first embodiment.

  As shown in FIGS. 6 and 7, the heating heat exchanger 2 of the present embodiment includes fins 70 common to the first heater core 10 and the second heater core 20. The common fin 70 has such a length that the length of the fin in the air flow direction extends over both the tube 11 of the first heater core 10 and the tube 21 of the second heater core 20. The common fin 70 is provided across the tube 11 of the first heater core 10 and the tube 21 of the second heater core 20. Thus, in this embodiment, the fins 14 of the first heater core 10 and the fins 24 of the second heater core 20 are continuous, and between the tube 11 of the first heater core 10 and the tube 21 of the second heater core 20. Even fins are present.

  According to the present embodiment, since the fins 14 of the first heater core 10 and the fins 24 of the second heater core 20 are integrated, the number of parts can be reduced compared to the first embodiment in which both are separate bodies. Thus, productivity can be improved and manufacturing costs can be reduced.

(Third embodiment)
FIG. 8 shows a side view of the heating heat exchanger 2 in the present embodiment, and FIG. 9 shows a cross-sectional view taken along line IX-IX in FIG. Similarly to the second embodiment, the heating heat exchanger 2 of the present embodiment includes the tube 11 of the first heater core 10 in addition to the integration of the inlet side tank portions 12 and 22 and the integration of the fins 14 and 24. The tube 21 of the second heater core 20 is integrated in the air flow direction. Other configurations are the same as those in the first and second embodiments.

  As shown in FIGS. 8 and 9, the heat exchanger 2 for heating according to the present embodiment includes a plurality of tubes 80 common to the first heater core 10 and the second heater core 20. The inside of one common tube 80 is partitioned into two flow paths, and these two flow paths constitute the tube 11 of the first heater core 10 and the tube 21 of the second heater core 20.

  Here, FIGS. 10 and 11 show cross-sectional views of the common tube 80 in the first example and the second example. As the common tube 80, as shown in FIG. 10, a configuration in which two independent flow paths are formed by bending and brazing one plate 81, or as shown in FIG. It is possible to employ a configuration in which two independent flow paths are formed by superimposing and brazing the two plates 82 and 83. Thus, the tube 11 of the first heater core 10 and the tube 21 of the second heater core 20 can be formed using a common plate.

  Further, FIG. 12 shows a cross-sectional view of the inlet side tank portions 12 and 22 of the first and second heater cores 10 and 20, and FIG. 13 shows a view of the partition wall 51 in FIG. As shown in FIGS. 12 and 13, in this embodiment, the partition wall 51 has a concave portion 51 a having a shape along a portion of the common tube 80 that protrudes from the core plate 53. Thereby, the partition wall 51 is connected to the common tube 80 and the core plate 53, and the tank internal space formed by the common tank main body member 52 and the common core plate 53 is replaced with the space on the first heater core 10 side. It can partition into the space with the 2nd heater core 20 side.

  Thus, in this embodiment, since the tube 11 of the 1st heater core 10 and the tube 21 of the 2nd heater core 20 are integrated, compared with 1st, 2nd embodiment which has separated both separately. And the space | interval of the 1st, 2nd heater cores 10 and 20 can be narrowed, and the heat exchanger 2 for heating can be reduced in size. This is because, in the case where the two are separated as in the first and second embodiments, the positional relationship between the tubes and the inlet side tank portions in each heater core and the prevention of bonding of the tubes by the brazing material. Although the interval between the tubes of the first and second heater cores 10 and 20 is determined by the necessary interval, if the tube 11 and 21 of the first and second heater cores 10 and 20 are integrated, the tube itself This is because the distance between the tubes of the first and second heater cores 10 and 20 can be determined by the above design.

  In the present embodiment, one common tube 80 is formed by the common plates 81, 82, 83, thereby forming two tubes 11 of the first heater core 10 and the tube 21 of the second heater core 20. Since it can do, productivity can be improved compared with the case where the tube 11 of the 1st heater core 10 and the tube 21 of the 2nd heater core 20 are formed separately.

  Incidentally, even if the tube 11 of the first heater core 10 and the tube 21 of the second heater core 20 are integrated, the amount of heat transfer from the high-temperature cooling water flowing through the second heater core 20 to the low-temperature cooling water flowing through the first heater core 10. Therefore, the relationship that the temperature of the cooling water flowing through the second heater core 20 is higher than that of the cooling water flowing through the first heater core 10 does not change.

  In the present embodiment, the fins 14 of the first heater core 10 and the fins 24 of the second heater core 20 are integrated. However, as in the first embodiment, they may be separated as separate bodies.

(Fourth embodiment)
FIG. 14 shows a side view of the heat exchanger for heating in the present embodiment. In this embodiment, in the heating heat exchanger 2 described in the third embodiment, the inlet side tank portions 12 and 22 of the first and second heater cores 10 and 20 are separated. Other configurations are the same as those in the third embodiment.

  Thus, even if the inlet side tank portions 12 and 22 of the first and second heater cores 10 and 20 are separated, the tubes 11 and 21 of the first and second heater cores 10 and 20 are integrated, so both tubes Compared with the case where 11 and 21 are made into separate bodies, the heat exchanger 2 for heating can be reduced in size, and productivity can be improved.

  In the present embodiment, the fins 14 and 24 of the first and second heater cores 10 and 20 may be separated as separate bodies.

  In the present embodiment, the tubes 11 and 21 of the first and second heater cores 10 and 20 may be separated. Even in this case, since the fins 14 and 24 of the first and second heater cores 10 and 20 are integrated, the heat exchanger 2 for heating is compared with the case where the fins 14 and 24 are separated. Can improve productivity.

  In the present embodiment, the inlet side tank portions 12 and 22 of the first and second heater cores 10 and 20 are configured as separate bodies, and the outer walls of the two tank portions are connected to each other. The 10 and 20 inlet side tank portions 12 and 22 may be integrated.

(Fifth embodiment)
FIG. 15 shows a side view of the heat exchanger for heating in the present embodiment. In the present embodiment, the widths of the tubes 11 and 21 of the first and second heater cores 10 and 20 are made different from those of the heating heat exchanger 2 shown in FIG. 3 described in the first embodiment. Other configurations are the same as those of the first embodiment.

  As described in the first embodiment, low temperature and large flow rate cooling water flows into the first heater core 10, and high temperature and small flow rate cooling water flows into the second heater core 20. Therefore, in the present embodiment, as shown in FIG. 15, the width of the tube 11 of the first heater core 10 in the air flow direction is increased according to the flow rate of the cooling water to increase the cross-sectional area of the flow path. 2 The width of the tube 21 of the heater core 20 in the air flow direction is shortened to reduce the cross-sectional area of the flow path.

  Thus, it is preferable to set the width of the tubes 11 and 21 of the first and second heater cores 10 and 20 according to the flow rate of the cooling water.

  In addition, this embodiment is applicable not only to the heat exchanger 2 for heating of 1st Embodiment but the heat exchanger 2 for heating demonstrated in 2nd-4th embodiment.

(Other embodiments)
(1) In each of the embodiments described above, the vehicle mounting posture of the heating heat exchanger 2 is the direction in which the longitudinal direction of the tubes 11 and 21 is parallel to the vertical direction. However, the heating heat exchanger 2 is viewed from the side. When viewed, the heating heat exchanger 2 may be inclined so that the angle formed between the longitudinal direction of the tubes 11 and 21 and the vertical direction is an acute angle.

  (2) In each of the above-described embodiments, the cooling water flowing out from the first cooling water outlet 31b of the engine 30 is only the cooling water that has cooled the cylinder head 31, but with respect to the cooling water that has cooled the cylinder head 31. The cooling water in which a part of the cooling water for cooling the cylinder block 32 is mixed may be used. In short, it is only necessary that the cooling water mainly cooling the cylinder head 31 flows out from the first cooling water outlet 31b of the engine 30.

  Similarly, the cooling water flowing out from the second cooling water outlet 32b of the engine 30 was only the cooling water that cooled the cylinder block 32, but the cylinder head 31 was cooled with respect to the cooling water that cooled the cylinder block 32. Cooling water mixed with a part of the cooling water may be used. In short, the cooling water mainly cooling the cylinder block 32 flows out from the second cooling water outlet 32b of the engine 30, and the cooling water flowing out from the second cooling water outlet 32b rather than the cooling water flowing out from the first cooling water outlet 31b. As long as the temperature is higher.

  However, the cooling water flowing out from the second cooling water outlet 32b of the engine 30 has a higher temperature than when all of the cooling water after cooling the cylinder head 31 and the cooling water after cooling the cylinder block 32 are mixed. To do. Thereby, it is because a high temperature cooling water can be made to flow out from the engine 30 compared with the case where both cooling water is mixed together.

  (3) In each of the embodiments described above, the cooling water flowing into the second heater core 20 was only the cooling water flowing out from the second cooling water outlet 32b of the engine 30, but the cooling water flowing out from the first cooling water outlet 31b. A part of the cooling water may be mixed.

  In short, it is only necessary that the cooling water mainly flows out from the second cooling water outlet 32 b and has a higher temperature than the cooling water flowing into the first heater core 10 and flows into the second heater core 20. However, the cooling water flowing into the second heater core 20 has a temperature higher than the average temperature when the cooling water flowing out from the second cooling water outlet 32b and the cooling water flowing out from the first cooling water outlet 31b are all mixed. . This is because the air temperature after heating by the second heater core 20 can be increased as compared with the case where both the cooling waters are all mixed.

  (4) In each of the above-described embodiments, the first heater core 10 uses the cooling water after cooling the cylinder head as a heat source, and the second heater core 20 uses the cooling water after cooling the cylinder block as a heat source. The two heater core 20 may use another liquid as a heat source. The present invention can be applied when the first heater core 10 uses the first liquid as a heat source and the second heater core 20 uses the second liquid having a higher temperature and a lower flow rate than the first liquid as a heat source.

  For example, in a vehicle air conditioner mounted on a hybrid vehicle, the coolant of an electric device such as an inverter can be used as the first liquid, and the engine coolant can be used as the second liquid. Further, for example, in a vehicle air conditioner mounted on an electric vehicle, a cooling liquid of an electric device such as an inverter is used as the first liquid, and a high-temperature liquid heated by heating means such as an electric heater is used as the second liquid. Can do. Thus, the vehicle air conditioner of the present invention can be mounted on vehicles other than hybrid vehicles.

  (5) You may combine each above-mentioned embodiment in the range which can be implemented.

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 2 Heating heat exchanger 10 1st heater core (1st heat exchange part)
DESCRIPTION OF SYMBOLS 11 Tube 12 Inlet side tank part 13 Outlet side tank part 20 2nd heater core (2nd heat exchange part)
21 Tube 22 Inlet side tank part 23 Outlet side tank part 50 One inlet side tank 51 Partition wall 70 Common fin 80 Common tube

Claims (5)

A heat exchanger (2) for heating that heats the air blown into the vehicle interior using the first liquid and the second liquid having a higher temperature and a lower flow rate than the first liquid as a heat source,
The heating heat exchanger (2) is heated by the first heat exchange unit (10) for exchanging heat between the first liquid and the blown air, and the second liquid and the first heat exchange unit (10). A second heat exchange section (20) for exchanging heat with the blown air,
The first and second heat exchange sections (10, 20) are both in communication with the plurality of stacked tubes (11, 21) and one end in the longitudinal direction of the plurality of tubes (11, 21). An inlet side tank portion (12, 22) serving as an inlet side and an outlet side tank portion (13, 23) serving as a liquid outlet side communicating with the other end in the longitudinal direction of the plurality of tubes (11, 21). Prepared,
The inlet side tank part (12) of the first heat exchange part (10) and the inlet side tank part (22) of the second heat exchange part (20) are inside one tank part (50). A vehicle air conditioner that is integrated as a structure that is divided into two by a partition wall (51). Both the first and second heat exchange parts (10, 20) include fins (14, 24) for heat transfer promotion provided on outer surfaces of the plurality of tubes (11, 21),
2. The vehicle according to claim 1, wherein the fins (14) of the first heat exchange part (10) and the fins (24) of the second heat exchange part (20) are integrated. Air conditioner. A heat exchanger (2) for heating that heats the air blown into the vehicle interior using the first liquid and the second liquid having a higher temperature and a lower flow rate than the first liquid as a heat source,
The heating heat exchanger (2) is heated by the first heat exchange unit (10) for exchanging heat between the first liquid and the blown air, and the second liquid and the first heat exchange unit (10). A second heat exchange section (20) for exchanging heat with the blown air,
The first and second heat exchange sections (10, 20) are both in communication with the plurality of stacked tubes (11, 21) and one end in the longitudinal direction of the plurality of tubes (11, 21). An inlet-side tank portion (12, 22) serving as an inlet side, and an outlet-side tank portion (13, 23) serving as a liquid outlet side, communicating with the other end in the longitudinal direction of the plurality of tubes (11, 21); Fins (14, 24) for heat transfer promotion provided on the outer surface of the plurality of tubes (11, 21),
The vehicle air conditioner characterized in that the fin (14) of the first heat exchange section (10) and the fin (24) of the second heat exchange section (20) are integrated.   The tube (11) of the first heat exchange part (10) and the tube (21) of the second heat exchange part (20) are integrated with each other. The vehicle air conditioner as described in any one. A heat exchanger (2) for heating that heats the air blown into the vehicle interior using the first liquid and the second liquid having a higher temperature and a lower flow rate than the first liquid as a heat source,
The heating heat exchanger (2) is heated by the first heat exchange unit (10) for exchanging heat between the first liquid and the blown air, and the second liquid and the first heat exchange unit (10). A second heat exchange section (20) for exchanging heat with the blown air,
The first and second heat exchange sections (10, 20) are both in communication with the plurality of stacked tubes (11, 21) and one end in the longitudinal direction of the plurality of tubes (11, 21). An inlet side tank portion (12, 22) serving as an inlet side and an outlet side tank portion (13, 23) serving as a liquid outlet side communicating with the other end in the longitudinal direction of the plurality of tubes (11, 21). Prepared,
The vehicle air conditioner characterized in that the tube (11) of the first heat exchange part (10) and the tube (21) of the second heat exchange part (20) are integrated.

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