JP6106503B2 - Evaporator and vehicle air conditioner using the same - Google Patents

Description

  The present invention relates to an evaporator and a vehicle air conditioner using the evaporator.

  In this specification and claims, the front (left side in FIG. 1) of the vehicle in which the vehicle air conditioner is used is referred to as the front, and the rear (right side in FIG. 1) is referred to as the rear. (Up and down) is called up and down.

  For example, in a cab-over type light truck, a full-center vehicle air conditioner is used for the purpose of reducing the installation space. As a fully centered vehicle air conditioner, a casing, a temperature adjusting unit that is provided in the casing and adjusts the temperature of the air sent into the casing, and air is sent into the casing, and the temperature adjusting unit adjusts the temperature. A blower that blows out the air that has been evacuated into the passenger compartment, and the temperature control unit sends the evaporator disposed in the casing, the heater core disposed downstream of the evaporator in the air flow direction, and the heater core after passing through the evaporator. And an air mix damper that adjusts the ratio of the amount of air that passes through the evaporator and the amount of air that bypasses the heater core after passing through the evaporator. A heat exchange core part having a refrigerant flow pipe part is provided, and the refrigerant adjacent to the heat exchange core part A ventilation gap is formed between the pipe sections to allow the air sent into the casing by the blower to pass therethrough, and the evaporator is disposed with the longitudinal direction of the refrigerant circulation pipe section facing the vertical direction of the vehicle. All the ventilation gaps of the part are opened to the front side, and the opening is an air introduction part for introducing air into the ventilation gap, all the ventilation gaps of the heat exchange core part are opened to the rear side, and the opening is the ventilation gap. The blower is disposed above the casing and in front of the evaporator, and the blower case air blows out to the front of the evaporator in the upper wall portion of the casing. An air intake port communicating with the opening is provided, and the air intake port of the casing and the evaporator are disposed on the front side of the evaporator in the casing. Correlator air conditioning system communication air passage establishing communication between the air inlet portion of the ventilation gap is provided in the heat exchange core portion has been known (see Patent Document 1).

  By the way, recently, for the purpose of securing a vehicle interior space, further downsizing of a vehicle air conditioner for a full center is required. However, in the vehicle air conditioner described in Patent Document 1, the evaporator is disposed in a state where the longitudinal direction of the refrigerant flow pipe portion is directed in the vertical direction of the vehicle, and all the ventilation gaps of the heat exchange core portion are opened to the front side. In addition, the opening serves as an air introduction part that introduces air into the ventilation gap, and all the ventilation gaps of the heat exchange core part open to the rear side, and the air delivery part that sends out the air that has passed through the ventilation gap. And the air blower is disposed above the casing and on the front side of the evaporator, and on the front side of the evaporator on the upper wall portion of the casing, the air intake port leading to the air outlet of the case of the air blower is provided, The air intake port of the casing and the heat exchange core part of the evaporator are connected to the front side of the evaporator in the casing. Since communication air passage establishing communication between the air inlet portion of the gap is provided, there is a problem that further miniaturization becomes relatively large longitudinal dimension is difficult.

Japanese Patent No. 4075169

  An object of the present invention is to provide an evaporator capable of solving the above-described problems and reducing the size of the vehicle air conditioner in the front-rear direction to reduce the size, and a vehicle air conditioner using the evaporator.

  In order to achieve the above object, the present invention comprises the following aspects.

1) It has a heat exchange core part having a plurality of refrigerant flow pipe parts arranged in the same direction with their longitudinal directions oriented and spaced apart, and fins arranged between adjacent refrigerant flow pipe parts. An evaporator in which a ventilation gap is formed between adjacent refrigerant flow pipe parts of the heat exchange core part,
All the ventilation gaps of the heat exchange core part open to one end side in the longitudinal direction of the refrigerant flow pipe part, and the opening becomes an air introduction part for introducing air into the ventilation gap, and all the ventilation gaps of the heat exchange core part are The refrigerant flow pipe part opens on one side perpendicular to the longitudinal direction of the refrigerant flow pipe part, and the opening serves as an air delivery part that sends out air that has passed through the ventilation gap. The air introduction part side end is opened and the other end is closed in the ventilation gap formed between the adjacent refrigerant circulation pipe parts, spaced apart in the thickness direction of the circulation pipe part, and the refrigerant circulation pipe part A plurality of first flow paths that allow air to flow in the longitudinal direction, and a plurality of second flow paths that open at the air delivery section side end and flow air in the width direction of the refrigerant flow pipe section. flow path and the second flow path is vented, the ventilation of the heat exchange core In the gap, the first fin joined to the refrigerant circulation pipe part on one side of the ventilation gap, and the second fin joined to the refrigerant circulation pipe part on the other side of the ventilation gap and the first fin are arranged in a stacked manner. The first flow path is formed between the first fin and the refrigerant flow pipe portion joined to the first fin, and the second flow path is the refrigerant flow pipe joined to the first fin and the second fin. is formed between the parts, Eve through hole to let through the first and second channels in the first fin is formed porator.

2) The first flow path provided in the ventilation gap of the heat exchange core part is such that the opening of the groove formed by the both side wall parts and the bottom wall part provided in the first fin is closed by the refrigerant flow pipe part. The evaporator according to 1), wherein a through hole is formed in the bottom wall portion of the first fin to allow the first flow path and the second flow path to pass therethrough.

3) Of all the first flow paths provided in the ventilation gap of the heat exchange core section, the first flow path at the end opposite to the air delivery section of the ventilation gap extends from the air introduction section of the ventilation gap to the flat hollow body. A straight line extending to the middle part in the longitudinal direction, and the remaining first flow paths are connected to the straight part extending from the air introduction part of the ventilation gap to the middle part in the longitudinal direction of the flat hollow body, and the tip part of the straight part. A first bent portion is formed of a bent portion which is bent to the opposite side to the air sending portion and the tip portion is located at the end on the opposite side to the air sending portion, and forms a first flow path at the opposite end to the air sending portion. A through-hole through which the first channel and the second channel are formed is formed in the bottom wall portion of the fin, and the position corresponding to the tip of the bent portion in the bottom wall portion of the first fin forming the remaining first channel The evaporator according to 2) above, wherein a through hole is formed through the first flow path and the second flow path.

4) The second fin has a corrugated shape including a wave crest extending over the entire width of the refrigerant flow pipe part, a wave bottom extending over the full width of the refrigerant flow pipe part, and a connecting part that connects the wave crest part and the wave bottom part over the entire length. There wave trough portion is bonded to the other while being joined to either one of refrigerant flow tube portion and the first fin, any of the above 1) to 3) having a through hole connecting portion is formed The evaporator as described in.

5) A corrugated strip comprising a wave top portion extending in the width direction of the refrigerant flow tube portion, a wave bottom portion extending in the width direction of the refrigerant flow tube portion, and a connecting portion that connects the wave top portion and the wave bottom portion, In the width direction of the refrigerant flow pipe part, the wave crests of the two adjacent corrugated strips, the wave bottom parts, and the connection parts are arranged in a plurality in such a way that they are displaced in the vertical direction, and are offset integrally connected to each other Among the above 1) to 3) , the wave crests of all the corrugated strips are joined to one of the refrigerant flow pipe part and the first fin and the wave bottom is joined to the other. The evaporator as described in any one of.

6) A header tank part through which all the refrigerant circulation pipe parts communicate is provided at an end opposite to the air introduction part among both longitudinal ends of the refrigerant circulation pipe part, and all the refrigerant circulation pipe parts and the header tank parts are provided. However, a plurality of rectangular flat hollow bodies are formed by stacking adjacent ones in the thickness direction of the flat hollow bodies, and the flat hollow bodies are formed in the longitudinal direction of the flat hollow bodies. Two swelled refrigerant flow pipes that are extended and spaced apart in the width direction of the flat hollow body, and a portion near one end in the longitudinal direction of the flat hollow body are spaced apart in the width direction of the flat hollow body. Two bulging tank forming portions that are connected to the refrigerant flow pipe portion and constitute the header tank portion, and the bulging height of the flat hollow body tank forming portion is the bulge of the refrigerant flow pipe portion. It is higher than the height, By joining the tank forming portions of the hollow bodies so that the insides of both tank forming portions communicate with each other, a ventilation gap is formed between the refrigerant flow pipe portions of the adjacent flat hollow bodies, and the first fin and the first fin The evaporator according to any one of the above 1) to 5) , wherein the two fins are arranged in the ventilation gap so as to straddle both refrigerant flow pipe portions arranged in the width direction of the flat hollow body.

7) A casing, a temperature control unit that adjusts the temperature of the air that is provided in the casing and is sent into the casing, and air that is sent into the casing and that has been temperature-adjusted in the temperature control unit. And a temperature adjusting unit that has passed through the evaporator disposed in the casing, the heater core disposed on the downstream side in the air flow direction of the evaporator, the amount of air sent to the heater core after passing through the evaporator, and the evaporator An air conditioner for a vehicle comprising an air mix damper that adjusts the ratio of the amount of air that bypasses the heater core later,
The evaporator of the temperature control unit is an evaporator according to any one of the above 1) to 6) , and the air sent into the casing by the blower is introduced from the air introduction unit into the ventilation gap of the evaporator, A vehicle air conditioner configured to pass through a ventilation gap and be sent out from an air delivery unit.

8) The upper part of the casing is provided with an air intake port that leads to the air outlet of the blower case, and the evaporator is placed with the longitudinal direction of the refrigerant flow pipe part facing up and down and the air introduction part positioned at the upper end. Or the state where the air introduction portion of the ventilation gap of the heat exchange core portion is inclined so as to be located above and at the front or rear of the end portion opposite to the air introduction portion side end portion of the refrigerant flow pipe portion. The air conditioner for a vehicle according to the above 7) , wherein the air introduction portion of the ventilation gap of the heat exchange core portion of the evaporator is located below the air intake port of the casing and communicates with the air intake port. apparatus.

According to the evaporators 1) to 6) above, all the ventilation gaps of the heat exchange core part open to one end side in the longitudinal direction of the refrigerant flow pipe part, and the air introduction part introduces the air into the ventilation gap. Since all the ventilation gaps of the heat exchange core part are opened on one side perpendicular to the longitudinal direction of the refrigerant flow pipe part, and the opening is an air delivery part for sending out the air that has passed through the ventilation gap. For example, when used as an evaporator of a vehicle air conditioner of the above 9) and 10), the casing is provided with an air intake port that leads to an air outlet port of the blower case, and the ventilation gap of the heat exchange core portion of the evaporator is provided. When the air inlet is located just inside the casing air intake, the air sent from the air intake directly passes from the air inlet into the ventilation gap of the evaporator. Flow into. Therefore, as in the vehicle air conditioner described in Patent Document 1, communication ventilation is provided in the front portion of the evaporator in the casing through the air intake of the casing and the air introduction portion of the ventilation gap in the heat exchange core portion of the evaporator. There is no need to provide a road. As a result, the longitudinal dimension of the vehicle air conditioner can be made relatively small, and the size can be reduced.

According to the evaporator of 1) above , the heat exchange core is provided with an air introduction part for introducing air into the air gap at a longitudinal end portion of the refrigerant flow pipe part in the heat exchange core part with a relatively simple configuration. An air delivery part that sends out the air that has passed through the ventilation gap can be provided on one side of the part perpendicular to the longitudinal direction of the refrigerant flow pipe part.

According to the evaporators 1) and 2) above , the air introduction side end is opened and the other end is closed in the ventilation gap formed between the adjacent refrigerant circulation pipes, and the length of the refrigerant circulation pipe is A plurality of first flow paths that allow air to flow in the direction, and a plurality of second flow paths that open at the air delivery section side end and flow air in the width direction of the refrigerant flow pipe section. It is possible to relatively easily produce an evaporator having a configuration in which the first flow path and the second flow path are communicated .

According to the evaporator of 3) , since the air flowing through the first flow path enters the second flow path and then the distance flowing through the second flow path becomes long, the air cooling efficiency is improved.

According to the evaporator of the above 4) , the space between the adjacent connecting portions of the second fin becomes the second flow path, and the adjacent second flow paths are communicated with each other through the through hole, so that the air cooling efficiency is improved.

According to the evaporator of 5) , the space between adjacent connecting portions of the corrugated strip of the second fin becomes the second flow path, and all the second flow paths are communicated, so that the air cooling efficiency is improved.

According to the vehicle air conditioner of 7) and 8) above, the casing is provided with an air intake port that leads to the air blowout port of the blower case, and the air introduction portion of the ventilation gap of the heat exchange core portion of the evaporator is the casing. If it is arranged just inside the air intake port, the air sent from the air intake port flows directly into the ventilation gap of the evaporator from the air introduction portion. Therefore, as in the vehicle air conditioner described in Patent Document 1, communication ventilation is provided in the front portion of the evaporator in the casing through the air intake of the casing and the air introduction portion of the ventilation gap in the heat exchange core portion of the evaporator. There is no need to provide a road. As a result, the longitudinal dimension of the vehicle air conditioner can be made relatively small, and the size can be reduced.

According to the vehicle air conditioner of 8) above, the installation space can be reduced particularly when used as a full-center-place vehicle air conditioner for a cab-over type small truck. It becomes possible to secure.

1 is a vertical sectional view schematically showing a vehicle air conditioner using an evaporator according to the present invention. It is a perspective view which shows the whole structure of the evaporator by this invention used for the vehicle air conditioner of FIG. It is a partial expanded sectional view which follows the direction orthogonal to the longitudinal direction of the refrigerant | coolant flow pipe part which shows the structure of a part of evaporator of FIG. It is a perspective view which shows the 1st outer fin and 2nd outer fin arrange | positioned in the ventilation gap of the evaporator of FIG. It is a figure equivalent to FIG. 3 which shows the modification of the 2nd outer fin shown by FIG. It is a perspective view which shows the other modification of the 2nd outer fin shown by FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum. In the following description, the left and right sides of the vehicle, that is, the left and right when looking forward from the rear are referred to as left and right.

  FIG. 1 schematically shows an air conditioner for a vehicle using an evaporator according to the present invention. 2 shows the overall configuration of the evaporator used in the vehicle air conditioner of FIG. 1, and FIGS. 2 to 4 also show the configuration of the main part of the evaporator.

  In FIG. 1, a vehicle air conditioner (1) includes a synthetic resin casing (2), and a temperature adjustment unit (inside the casing (2), for adjusting the temperature of air sent into the casing (2)). 3) and a blower which is arranged above the front portion of the casing (2) and sends air into the casing (2) and blows out the air whose temperature has been adjusted in the temperature adjusting section (3) into a vehicle interior (not shown) (4).

  On the front side of the upper wall portion of the casing (2), an air intake port (2a) communicating with the air blowing port (4b) of the case (4a) of the blower (4) is provided. Although not shown, a defroster opening, a face opening, and a foot opening are provided on the rear side of the blower (4) in the upper wall portion of the casing (2), and the air intake (2a ) And a defroster opening, a face opening, and a foot opening are communicated by a ventilation path (5) provided in the casing (2). Then, the air whose temperature is adjusted in the temperature adjusting unit (3) by the blowing mode switching unit (not shown) provided in the casing (2) is sent out from the opening of the defroster and passes through the defroster duct to the windshield. Blown toward the occupant's feet through the face opening, the case being blown out from the face opening and through the face duct toward the head of the occupant It is possible to switch between cases.

  The temperature control unit (3) includes an evaporator (10) disposed immediately below the air intake (2a) in the ventilation path (5) in the casing (2), and an evaporator (10) in the ventilation path (5). A heater core (11) arranged to block a part of the ventilation path (5) on the downstream side in the air flow direction, and the amount of air sent to the heater core (11) after passing through the evaporator (10) and the evaporator (10) And an air mix damper (12) that adjusts the ratio of the amount of air that bypasses the heater core (11) after passing through. The air mix damper (12) is a rotary type and extends from the rotary shaft portion (12a) toward the evaporator (10) side from the rotary shaft portion (12a) and rotates around the rotary shaft portion (12a). And a shielding part (12b). The shielding part (12b) of the air mix damper (12) passes through the evaporator (10) and the first position (see the chain line in FIG. 1) where all the air that has passed through the evaporator (10) is sent to the heater core (11). The degree of opening is appropriately changed between the second position (see the solid line in FIG. 1) for bypassing the heater core (11) for all the air, and thereby the flow rate of air passing through the heater core (11) and the heater core (11) are reduced. The ratio with the flow rate of the bypass air is adjusted.

As shown in FIG. 2 and FIG. 3, the evaporator (10) has a plurality of flat refrigerants with the longitudinal direction and the width direction oriented in the same direction, and spaced apart in the direction perpendicular to the longitudinal direction and the width direction. A heat exchange core section (13) having a distribution pipe section (14) and aluminum outer fins (15) (16) disposed between adjacent refrigerant distribution pipe sections (14), and all refrigerant distribution The pipe part (14) includes a header tank part (22) (23) that communicates with one end part in the longitudinal direction. Here, the longitudinal direction of the refrigerant flow pipe part (14) faces the vertical direction of the vehicle, and the header tank The parts (22) and (23) are arranged in the ventilation path (5) in the casing (2) in a state where the parts (22) and (23) are located at the lower end . Hereinafter, the front, rear, upper, lower, left and right of the evaporator (10) are referred to based on the state of being arranged in the ventilation path (5) in the casing (2).

  The heat exchange core portion (13) of the evaporator (10) is provided with two rows of tube portion rows (14A) and (14B) made up of a plurality of refrigerant flow tube portions (14) arranged in the left-right direction. It has been. Between the refrigerant flow pipe parts (14) adjacent in the left-right direction in each pipe part row (14A) (14B) of the heat exchange core part (13) of the evaporator (10), straddles the front and rear refrigerant flow pipe parts (14). Thus, a ventilation gap (18) is formed. All the ventilation gaps (18) of the heat exchange core part (13) open to the upper end side (one end side in the longitudinal direction of the refrigerant flow pipe part (14)), and the opening part is in the ventilation gap (18). It is an air introduction part (19) for introducing air. Further, all the ventilation gaps (18) of the heat exchange core part (13) open to the rear side (one side perpendicular to the longitudinal direction of the refrigerant flow pipe part (14), that is, one side in the width direction), and The opening serves as an air delivery section (21) for delivering air that has passed through the ventilation gap (18). Then, in each ventilation gap (18), the first outer fin (15) brazed to the refrigerant circulation pipe (14) on one side of the ventilation gap (18) and the refrigerant circulation on the other side of the ventilation gap (18). A pipe portion (14) and a second outer fin (16) brazed to the first outer fin (15) are arranged in a laminated form. Note that the space between the refrigerant flow pipe portions (14) adjacent in the left-right direction, that is, the front side of the ventilation gap (18) is closed by a wall portion constituting the casing (2).

  The header tank portions (22) and (23) of the evaporator (10) are connected to the lower end portion of the evaporator (10) (the end opposite to the air introduction portion (19) of both ends in the longitudinal direction of the refrigerant flow pipe portion (14)). Are provided side by side in the front-rear direction with the longitudinal direction directed in the left-right direction (the direction perpendicular to the longitudinal direction of the refrigerant flow pipe section (14)). The rear header tank section (22) is connected to the lower ends of all the refrigerant flow pipe sections (14) in the rear pipe section row (14A), and the front header tank section (23) is connected to the front pipe section. The lower end portions of all the refrigerant flow pipe portions (14) in the row (14B) are communicated. A refrigerant inlet (24) is provided at one end of the rear header tank section (22), and a refrigerant outlet (25) is provided at the other end of the front header tank section (23). ) In the header tank portions (22) and (23) at necessary locations so that the refrigerant flowing in from the refrigerant outlet pipe (25) flows out through the entire refrigerant flow pipe portion (14), and is moved in the left-right direction by a partition member (not shown). It is divided into compartments lined up.

  The refrigerant flow pipe part (14) and the header tank part (22) (23) of the evaporator (10) are vertically rectangular with the longitudinal direction facing the up-down direction and the width direction facing the front-rear direction, and the left-right direction (header It is formed by brazing a plurality of flat hollow bodies (26) arranged side by side in the longitudinal direction of the tank part (17). Two swelled refrigerant flow pipe parts (14) extending in the vertical direction on the flat hollow body (26), and the lower end of each refrigerant flow pipe part (14) (the end opposite to the air introduction part (19)) ) And the bulging tank forming portion (27) constituting the header tank portions (22) and (23) are spaced apart in the front-rear direction, and the bulging height of the tank forming portion (27) is The height is higher than the bulging height of the refrigerant flow pipe section (14). Then, the tank forming portions (27) of the adjacent flat hollow bodies (26) are brazed so that the inside communicates, whereby the refrigerant flow pipe portion (14) and the header tank portion ( 22) and (23) are formed, and a ventilation gap (18) is formed between the refrigerant flow pipe portions (14) adjacent in the left-right direction. In the refrigerant flow pipe portions (14) before and after each flat hollow body (26), an aluminum corrugated inner fin (for the purpose of increasing the heat transfer area and improving the pressure resistance of the refrigerant flow pipe portion (14)). 32) is disposed across the front and rear refrigerant flow pipe sections (14), and is brazed to the flat hollow body (26).

  The flat hollow body (26) is formed by brazing the peripheral portions of a plate (28) made of an aluminum brazing sheet having a brazing material layer on both sides. Although not shown in detail, the plate (28) that forms most of the flat hollow body (26) is provided with a bulging portion (29) for a pipe portion provided on the front side portion and the rear side portion and bulging to one side. The lower end portion of the front side portion and the rear side portion is provided so as to communicate with the bulge portion for pipe portion (29), and bulges in the same direction as the bulge portion for pipe portion (29) and bulge for pipe portion A tank bulge portion (not shown) having a bulge height higher than that of the portion (29). A through hole is formed in the top wall of each tank bulge. The bulge height of the bulge part (31) for the tank in the laterally outer plate (28) forming the flat hollow body (26) disposed at the left and right ends is the bulge height of the bulge part (29) for the pipe part. The through hole is not formed in the top wall of the bulge portion for tank (31). Then, the two plates (28) are arranged so that the openings of the bulge portion (29) for the pipe portion and the bulge portion (31) for the tank of both plates (28) face each other, and between the plates (28). The flat hollow body (26) is formed by brazing the plates (28) and the plates (28) with the inner fins (32) by combining the inner fins (32) so that they are interposed. The refrigerant flow pipe part (14) is constituted by the pipe bulge part (29) of both plates (22), and the tank forming part (27) is constituted by the tank bulge part (31).

  As shown in FIG. 3 and FIG. 4, the air introduction part (19) side end part is opened in the ventilation gap (18) of the heat exchange core part (13), the other end is closed, and the refrigerant flow pipe part ( 14) a plurality of first flow paths (33), (34) through which air flows in the longitudinal direction, the air delivery part (21) side end part opens, and air flows in the width direction of the refrigerant flow pipe part (14). A plurality of second flow paths (35) are provided, and the first flow paths (33), (34) and the second flow paths (35) are communicated with each other. The first flow path (33) (34) is formed between the first outer fin (15) and the refrigerant flow pipe section (14) to which the first outer fin (15) is brazed, and the second flow path. (35) is formed between the first outer fin (15) and the refrigerant flow pipe portion (14) to which the second outer fin (16) is brazed.

The first flow path (33) of the front end (the end opposite to the air delivery section (21) of the ventilation gap (18)) of all the first flow paths (33) and (34) is the ventilation gap (18). From the air introduction part (19) to the intermediate part in the longitudinal direction of the flat hollow body (26), and the remaining first flow path (34) extends from the air introduction part (19) of the ventilation gap (18). The straight hollow portion (26a) that extends to the middle in the longitudinal direction, and the front end of the straight hollow portion (34a) that bends forward (opposite to the air delivery portion (21)) The portion includes a bent portion (34b) located at the front end portion (the end portion on the opposite side to the air delivery portion (21)). All the first flow paths (33), (34) are formed by closing the right side opening of the groove provided in the first outer fin (15) and opened to the right side by the refrigerant flow pipe part (14). It is. In addition, the front side wall part of the 1st flow path (33) of a front end part is not necessarily required, and a part of front wall part of a casing (2) may be a side wall part. A plurality of through-holes (through the first channel (33) and the second channel (35) through the bottom wall of the groove of the first outer fin (15) forming the first channel (33) of the front end ( 36) is formed at intervals in the longitudinal direction and corresponds to the tip of the bent portion (34b) in the bottom wall portion of the groove of the first outer fin (15) forming the remaining first flow path (34). In the part, a plurality of through holes (36) are formed through the first flow path (33) and the second flow path (35). The through holes (36) of both the first flow paths (33), (34) are arranged substantially in a straight line.

  All the second flow paths (35) are linear extending in the front-rear direction. The second outer fin (16) extends in the front-rear direction and has a wave crest (16a) extending over the entire width of the flat hollow body (26), a wave bottom (16b) extending in the front-rear direction and over the entire width of the flat hollow body (26), and The corrugated shape includes a connecting portion (16c) that connects the wave crest portion (16a) and the wave bottom portion (16b), and a second flow path (35) is formed between adjacent connecting portions (16c). A wave crest portion (16a) of the second outer fin (16) is brazed to the first outer fin (15), and a wave bottom portion (16b) is brazed to the refrigerant flow pipe portion (14). Further, a through hole (37) is formed in the connecting portion (16c) of the second outer fin (16) to allow the adjacent second flow paths (35) to pass through. The front end portion of the second flow path (35) is closed by the front wall portion of the casing (2). Instead of the front end of the second flow path (35) being closed by the front wall of the casing (2), the front end of the second flow path (35) is closed by a closing plate joined to the evaporator (10). It may be closed.

  In the vehicle air conditioner described above, the air sent from the air intake (2a) to the ventilation path (5) in the casing (2) by the blower (4) is sent from the air introduction part (19) to the heat exchange core part. The refrigerant that enters the first flow path (33), (34) of the ventilation gap (18) of (13) and flows in the refrigerant flow pipe section (14) while flowing in the first flow path (33), (34). It is cooled by. The air cooled in the first flow path (33) (34) enters the second flow path (35) through the through hole (36) at the front end of the ventilation gap (18). While flowing backward in the second flow path (35), it is cooled by the refrigerant flowing in the refrigerant flow pipe portion (14). Further, while flowing backward in the second flow path (35), air flowing in the second flow path (35) adjacent vertically is mixed through the through hole (37).

  The air cooled while flowing through the first flow path (33) (34) and the second flow path (35) of the ventilation gap (18) of the evaporator (10) is sent to the air delivery section (21 ) To the rear and flow through the ventilation path (5). Here, by changing the opening degree of the air mix damper (12), the heater core (11) maintained at a high temperature (about 90 ° C.) by the engine coolant out of all the air cooled in the evaporator (10). The ratio of the flow rate of the air passing through and the flow rate of the low-temperature air that bypasses the heater core (11) after being cooled is adjusted, and the temperature of the air is adjusted in the temperature adjustment unit (3). The air whose temperature has been adjusted in the temperature adjusting unit (3) is sent out from the defroster opening by the blowing mode switching unit and blown out toward the front window through the defroster duct, and from the face opening. Switching between a case where the air is blown toward the head of the occupant through the face duct and a case where the air is blown toward the feet of the occupant from the foot opening through the foot duct.

  FIG. 5 shows a modification of the second outer fin used in the evaporator (10).

  In the connecting portion (16c) of the second outer fin (16) shown in FIG. 5, a plurality of louvers (40) extending in the width direction of the connecting portion (16c) are spaced apart in the longitudinal direction of the connecting portion (16c). Is provided. And although illustration was abbreviate | omitted, the 2nd adjacent flow path (35) is connected by the through-hole formed by providing a louver (40).

  FIG. 6 shows another modification of the second outer fin used in the evaporator (10).

  The second outer fin (45) shown in FIG. 6 is made of aluminum, and includes a wave crest (46a) extending in the front-rear direction, a wave bottom (46b) extending in the front-rear direction, and a wave crest (46a) and a wave bottom (46b). The two corrugated strips (46), each of which is formed by connecting a plurality of corrugated strips (46c) in the front-rear direction and integrally connected to each other, are adjacent to each other in the front-rear direction. The crest portions (46a) and the crest portions (46b) of the strip (46) are displaced in the vertical direction. The lengths in the front-rear direction of the wave crest portion (46a), the wave bottom portion (46b), and the connecting portion (46c) in each corrugated strip (46) are equal. As for the 2nd outer fin (45), the wave crest part (46a) of all the corrugated strips (46) is brazed to either one of a refrigerant | coolant flow pipe part (14) and a 1st outer fin (15). At the same time, the wave bottom (46b) is brazed to the other side.

  In the above embodiment, the longitudinal direction of the refrigerant flow pipe portion (14) faces the vertical direction of the vehicle, the air introduction portion (19) of the ventilation gap (18) is located at the upper end, and the header tank portion (22) ( 23) In the state located at the lower end, it is arranged in the ventilation path (5) in the casing (2), but is not limited to this, for example, the air introduction part (19) of the ventilation gap (18) Further, it may be arranged in an inclined state so as to be located above or behind the header tank portions (22) and (23).

  The vehicle air conditioner using the evaporator according to the present invention is preferably used as a full-center vehicle air conditioner for a cab-over type small truck in order to reduce the installation space.

(1): Vehicle air conditioner
(2): Casing
(2a): Air intake
(3): Temperature control unit
(4): Blower
(10): Evaporator
(11): Heater core
(12): Air mix damper
(13): Heat exchange core
(14): Refrigerant distribution pipe
(15): First outer fin
(16): Second outer fin
(16a): Wave peak
(16b): Wave bottom
(16c): Connection part
(18): Ventilation gap
(19): Air introduction part
(21): Air delivery part
(22) (23): Header tank
(26): Flat hollow body
(27): Tank formation part
(33) (34): First flow path
(34a): Straight section
(34b): Bend
(35): Second flow path
(36): Through hole
(37): Through hole
(45): Second outer fin
(46): Wavy strip
(46a): Wave peak
(46b): Wave bottom
(46c): Connection part

Claims (8)

A heat exchange core portion having a plurality of refrigerant flow pipe portions arranged in the same direction and spaced apart from each other, and fins arranged between adjacent refrigerant flow pipe portions; An evaporator in which a ventilation gap is formed between adjacent refrigerant flow pipe parts of the exchange core part,
All the ventilation gaps of the heat exchange core part open to one end side in the longitudinal direction of the refrigerant flow pipe part, and the opening becomes an air introduction part for introducing air into the ventilation gap, and all the ventilation gaps of the heat exchange core part are The refrigerant flow pipe part opens on one side perpendicular to the longitudinal direction of the refrigerant flow pipe part, and the opening serves as an air delivery part that sends out air that has passed through the ventilation gap. The air introduction part side end is opened and the other end is closed in the ventilation gap formed between the adjacent refrigerant circulation pipe parts, spaced apart in the thickness direction of the circulation pipe part, and the refrigerant circulation pipe part A plurality of first flow paths that allow air to flow in the longitudinal direction, and a plurality of second flow paths that open at the air delivery section side end and flow air in the width direction of the refrigerant flow pipe section. The flow path and the second flow path are communicated, and ventilation of the heat exchange core section In the gap, the first fin joined to the refrigerant circulation pipe part on one side of the ventilation gap, and the second fin joined to the refrigerant circulation pipe part on the other side of the ventilation gap and the first fin are arranged in a stacked manner. The first flow path is formed between the first fin and the refrigerant flow pipe portion joined to the first fin, and the second flow path is the refrigerant flow pipe joined to the first fin and the second fin. The evaporator in which the through-hole which is formed between these parts and makes a 1st fin pass a 1st flow path and a 2nd flow path is formed . The first flow path provided in the ventilation gap of the heat exchange core part is such that the opening of the groove formed by the both side wall parts and the bottom wall part provided in the first fin is closed by the refrigerant flow pipe part, The evaporator according to claim 1, wherein a through hole is formed in the bottom wall portion of the first fin to pass through the first flow path and the second flow path . Of all the first flow paths provided in the ventilation gap of the heat exchange core part, the first flow path at the end opposite to the air delivery part of the ventilation gap extends from the air introduction part of the ventilation gap to the longitudinal direction of the flat hollow body. The remaining first flow path is connected to the straight portion extending from the air introduction portion of the ventilation gap to the middle portion in the longitudinal direction of the flat hollow body, and the leading end portion of the straight portion. A first fin that bends to the opposite side of the part and has a tip part that is located at an end opposite to the air delivery part and forms a first flow path at the end opposite to the air delivery part. In the bottom wall portion, a through hole is formed through the first flow path and the second flow path, and at the position corresponding to the tip of the bent portion in the bottom wall portion of the first fin forming the remaining first flow path, The evaporator according to claim 2, wherein a through hole is formed through the first flow path and the second flow path . The second fin has a corrugated shape composed of a wave crest portion extending over the entire width of the refrigerant flow tube portion, a wave bottom portion extending over the entire width of the refrigerant flow tube portion, and a connecting portion connecting the wave crest portion and the wave bottom portion over the entire length. 4. The method according to claim 1, wherein the wave bottom portion is joined to the other of the flow pipe portion and the first fin, and the through hole is formed in the connecting portion . Evaporator. A corrugated strip comprising a wave top portion extending in the width direction of the refrigerant flow tube portion, a wave bottom portion extending in the width direction of the refrigerant flow tube portion, and a connecting portion connecting the wave top portion and the wave bottom portion is provided as the second fin. In the width direction of the tube portion, the wave crest portions of the two adjacent waved strips, the wave bottom portions, and the connection portions are arranged in a plurality so as to be displaced in the vertical direction, and are offset in an integral manner. And the wave crests of all the corrugated strips are joined to one of the refrigerant flow pipe part and the first fin, and the wave bottom is joined to the other. The evaporator as described in. A header tank part through which all the refrigerant flow pipe parts communicate is provided at an end opposite to the air introduction part among both ends in the longitudinal direction of the refrigerant flow pipe parts, and all the refrigerant flow pipe parts and the header tank parts are provided. A plurality of rectangular flat hollow bodies are formed in a laminated shape in the thickness direction of the flat hollow bodies and are formed by joining adjacent ones, and the flat hollow bodies extend in the longitudinal direction of the flat hollow bodies And two swelled refrigerant flow pipe portions provided at intervals in the width direction of the flat hollow body, and provided at intervals in the width direction of the flat hollow body at a portion near one end in the longitudinal direction of the flat hollow body. Two bulging tank forming portions that communicate with the refrigerant flow pipe portion and constitute the header tank portion, and the bulging height of the flat hollow body tank forming portion is higher than the bulging height of the refrigerant flow pipe portion. Is also higher, the adjacent flat The empty tank forming portions are joined so that the insides of both tank forming portions communicate with each other, whereby a ventilation gap is formed between the refrigerant flow pipe portions of the adjacent flat hollow bodies, and the first fin and the first fin The evaporator in any one of Claims 1-5 arrange | positioned in the ventilation gap so that 2 fins may straddle both the refrigerant | coolant flow pipe parts arranged in the width direction of the flat hollow body . A casing, a temperature adjusting unit that adjusts the temperature of air that is provided in the casing and sent into the casing, and a blower that sends air into the casing and blows out the air whose temperature is adjusted in the temperature adjusting unit into the vehicle interior An evaporator disposed in the casing, a heater core disposed downstream in the air flow direction of the evaporator, an amount of air sent to the heater core after passing through the evaporator, and a heater core after passing through the evaporator An air conditioner for a vehicle including an air mix damper that adjusts a ratio of an air amount that bypasses the air,
The evaporator of a temperature control part consists of an evaporator in any one of Claims 1-6, and while the air sent in in the casing by the air blower is introduce | transduced in the ventilation space of an evaporator from an air introduction part, ventilation is carried out A vehicle air conditioner configured to pass through a gap and be delivered from an air delivery unit . The upper portion of the casing is provided with an air intake port that leads to the air outlet port of the case of the blower, and the evaporator is arranged in a state where the longitudinal direction of the refrigerant flow pipe portion is directed in the vertical direction and the air introduction portion is located at the upper end, Alternatively, the air introduction part in the ventilation gap of the heat exchange core part is disposed in an inclined state so as to be located above and at the front or rear of the end of the refrigerant flow pipe part opposite to the air introduction part side end. The vehicle air conditioner according to claim 7, wherein the air introduction portion of the ventilation gap of the heat exchange core portion of the evaporator is located below the air intake port of the casing and communicates with the air intake port .

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