JP2009180383A - Evaporator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an evaporator capable of preventing drift of a liquid-phase refrigerant in a most downstream-side intermediate header portion, and preventing increase of passage resistance. <P>SOLUTION: This evaporator 1 comprises a refrigerant inlet header portion, a refrigerant outlet header portion, a plurality of intermediate header portions, and a heat exchanging core portion having a plurality of refrigerant circulating pipe portions. At least one end portion of the refrigerant outlet header portion is positioned at an outer end portion in the width direction of the heat exchanging core portion to form a refrigerant outlet at the end portion. A throttle hole 28 is formed at an end portion at a side where the refrigerant outlet is positioned, of the most downstream side intermediate header portion 11. The evaporator 1 comprises a refrigerant supply passage 29 for sending the refrigerant before entering the refrigerant inlet into the most downstream side intermediate header portion 11 through the throttle hole 28 from the end portion of the side where the refrigerant outlet is positioned. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an evaporator used for a car air conditioner that is a refrigeration cycle mounted on an automobile, for example.

  In this specification and claims, the top and bottom of FIGS. 1, 4 and 13 are the top and bottom.

  Conventionally, as an evaporator for a car air conditioner, a refrigerant inlet header part, a refrigerant outlet header part arranged on the upstream side in the ventilation direction of the refrigerant inlet header part, a first intermediate header part arranged below the refrigerant inlet header part, A second intermediate header portion arranged side by side on the side of the first intermediate header portion; a third intermediate header portion arranged side by side above the second intermediate header portion and on the side of the refrigerant inlet header portion; A fourth intermediate header portion arranged upstream of the third intermediate header portion in the ventilation direction and on the side of the refrigerant outlet header portion; a fifth intermediate header portion arranged below the fourth intermediate header portion; A refrigerant inlet header comprising a sixth intermediate header portion arranged below the refrigerant outlet header portion and side by side with the fifth intermediate header portion; and a heat exchange core portion having a plurality of refrigerant flow pipe portions. And one end of the refrigerant outlet header Each of the heat exchange core portions is positioned at the outer end in the width direction, and a refrigerant inlet is formed at one end located at the outer end in the width direction of the heat exchange core portion of the refrigerant inlet header portion. A refrigerant outlet is formed at one end located at the outer end in the width direction of the heat exchange core, and the refrigerant inlet header, the first intermediate header, the second intermediate header, the third intermediate header, and the fourth intermediate header. And the fifth intermediate header portion, and the sixth intermediate header portion and the refrigerant outlet header portion are respectively communicated by a plurality of refrigerant flow pipe portions, and the first intermediate header portion, the second intermediate header portion, and the third intermediate header portion, The fourth intermediate header portion, and the fifth intermediate header portion and the sixth intermediate header portion are respectively communicated, and the refrigerant is in the sixth intermediate header portion on the most downstream side from the end opposite to the side where the refrigerant outlet is located. As it flows into Evaporator was made to flow toward the end on the side where the sixth intermediate header portion is the refrigerant outlet located has been widely used.

  The evaporator described above is composed of two vertically long metal plates whose peripheral portions are joined to each other, and is connected to both ends of the swelled refrigerant flow tube portion and the refrigerant flow tube portion arranged in the ventilation direction between the two metal plates. The plurality of flat hollow bodies provided with the bulged header forming portions are arranged in a stacked manner in the width direction in the ventilation direction, and the header forming portions of the adjacent flat hollow bodies are joined to each other. The gap between the refrigerant flow pipe portions of the flat hollow body becomes a ventilation gap, and the refrigerant inlet header portion, the refrigerant outlet header portion and the first to sixth intermediate header portions are formed by the header forming portion of the flat hollow body, and the flat hollow body The refrigerant flow pipe part forms a heat exchange core part, and a refrigerant inlet and a refrigerant outlet are formed in a flat hollow body arranged at one end in the width direction of the heat exchange core part.

  However, in the case of the above-described evaporator, the following problems occur. That is, when the gas-liquid two-phase refrigerant flows in the length direction in the second intermediate header portion and the sixth intermediate header portion, the liquid-phase refrigerant drifts to the back side portions of these intermediate header portions due to inertial force. Therefore, the amount of liquid-phase refrigerant flowing through the plurality of refrigerant flow pipe portions arranged between the second intermediate header portion and the third intermediate header portion and between the sixth intermediate header portion and the refrigerant outlet header portion is both. It becomes non-uniform in the length direction of the intermediate header part. Therefore, the discharged air temperature, which is the temperature of the blown air that has passed through the ventilation gap between the refrigerant circulation pipe portions, becomes uneven in the length direction of the second and sixth intermediate header portions. Such a problem is particularly remarkable in the sixth intermediate header portion where the dryness is high and the amount of the liquid-phase refrigerant is small.

  Therefore, as an evaporator that solves such a problem, there has been proposed an evaporator in which a plurality of aperture plates having aperture holes are arranged in the second intermediate header portion and the sixth intermediate header portion (see Patent Document 1).

However, in the case of the evaporator described in Patent Document 1, there is a problem that the passage resistance increases and the performance of the evaporator decreases.
JP 2001-74388 A

  An object of the present invention is to provide an evaporator that solves the above-described problems, can prevent the liquid-phase refrigerant from drifting in the most downstream intermediate header portion, and can prevent passage resistance from increasing.

In order to achieve the above object, the present invention comprises the following aspects.
1) A refrigerant inlet header portion, a refrigerant outlet header portion and a plurality of intermediate header portions arranged in the same direction in the length direction, and a heat exchange core portion having a plurality of refrigerant flow pipe portions, A refrigerant inlet is formed in the inlet header, and at least one end of the refrigerant outlet header is positioned at the outer end in the width direction of the heat exchange core, and a refrigerant outlet is formed in the one end, and the refrigerant inlet header The most upstream intermediate header portion in the refrigerant flow direction is provided at an interval, and both header portions are communicated by a plurality of refrigerant flow pipe portions, and the refrigerant outlet header portion and the most downstream intermediate header portion in the refrigerant flow direction Are provided at intervals, and both header parts are communicated by a plurality of refrigerant flow pipe parts, and the refrigerant flows into the most downstream intermediate header part from the end opposite to the side where the refrigerant outlet is located. Both the evaporator was made to flow toward the downstream side intermediate header portion to the end portion on the side which is located a refrigerant outlet,
An evaporator provided with a refrigerant supply path for sending refrigerant before entering the refrigerant inlet from the end on the side where the refrigerant outlet is located into the most downstream intermediate header.

  2) A throttle hole is formed at the end of the most downstream intermediate header portion where the refrigerant outlet is located, and the refrigerant before entering the refrigerant inlet passes through the refrigerant supply path and passes through the throttle hole to the most downstream intermediate header. The evaporator according to the above 1), wherein the evaporator is sent into the section.

  3) The refrigerant inlet header and the refrigerant outlet header are arranged side by side in the ventilation direction, and the refrigerant inlet and the refrigerant outlet are formed at the same end of the refrigerant inlet header and the refrigerant outlet header, and the most downstream intermediate header 2. The evaporator according to 2) above, wherein a throttle hole is formed at an end portion on the side where the refrigerant inlet and the refrigerant outlet are located.

  4) A swelled refrigerant circulation pipe part composed of two vertically long metal plates whose peripheral parts are joined to each other and arranged in the ventilation direction between the two metal plates, and a swelled form connected to both ends of the refrigerant circulation pipe part The plurality of flat hollow bodies provided with the header forming portions are arranged in a stacked manner in the width direction in the ventilation direction, and the header forming portions of the adjacent flat hollow bodies are joined to each other, and the adjacent flat hollow bodies The gap between the refrigerant circulation pipe parts becomes a ventilation gap, and the refrigerant inlet header part, the refrigerant outlet header part and the plurality of intermediate header parts are formed by the flat hollow body header forming part, and heat exchange is performed by the flat hollow body refrigerant circulation pipe part. A flat hollow body formed with a core part and disposed at one end in the width direction of the heat exchange core part has a refrigerant inlet, a refrigerant outlet, and a throttle hole, and has an outer side of the flat hollow body having the refrigerant inlet, the refrigerant outlet, and the throttle hole. The refrigerant inlet Evaporator 3) above, wherein the supply passage forming metal plate forming a coolant supply passage establishing communication between throttle hole is joined.

  5) a refrigerant inlet header part, a refrigerant outlet header part arranged upstream of the refrigerant inlet header part in the ventilation direction, a first intermediate header part arranged below the refrigerant inlet header part, and a first intermediate header part A second intermediate header portion arranged side by side, a third intermediate header portion arranged side by side above the second intermediate header portion and lateral to the refrigerant inlet header portion, and a third intermediate header portion A fourth intermediate header portion arranged upstream of the ventilation direction and side by side of the refrigerant outlet header portion, a fifth intermediate header portion arranged below the fourth intermediate header portion, and a lower portion of the refrigerant outlet header portion And a sixth intermediate header portion arranged side by side on the side of the fifth intermediate header portion, and the first intermediate header portion becomes the most upstream side intermediate header portion in the refrigerant flow direction, and the sixth intermediate header portion The header part becomes the most downstream intermediate header part in the refrigerant flow direction. The refrigerant inlet header part, the first intermediate header part, the second intermediate header part, and the third intermediate header part are each formed by a downstream hollow header forming part of the flat hollow body, and the refrigerant outlet header part and the fourth intermediate header part The fifth intermediate header portion and the sixth intermediate header portion are formed by the upstream hollow header forming portion of the flat hollow body, respectively, and the refrigerant inlet header portion and the first intermediate header portion, the second intermediate header portion and the third intermediate portion The header portion, the fourth intermediate header portion and the fifth intermediate header portion, and the sixth intermediate header portion and the refrigerant outlet header portion are communicated with each other by a plurality of flat hollow refrigerant circulation pipe portions, and a third intermediate header. The evaporator according to the above 4), wherein the portion and the fourth intermediate header portion are communicated with each other via a communication passage formed in a flat hollow body.

  6) A refrigerant inlet header, a refrigerant outlet header disposed upstream of the refrigerant inlet header, a first intermediate header disposed below the refrigerant inlet header, and a lower refrigerant outlet header And a second intermediate header portion disposed upstream of the first intermediate header portion in the ventilation direction, the first intermediate header portion being the most upstream intermediate header portion in the refrigerant flow direction, and the second intermediate The header portion is the most downstream intermediate header portion in the refrigerant flow direction, and the refrigerant inlet header portion and the first intermediate header portion are respectively formed by the flattened hollow body ventilation direction downstream header forming portion, the refrigerant outlet header portion and the second header portion. The intermediate header portions are each formed by an upstream header forming portion of the flat hollow body in the ventilation direction, and the refrigerant inlet header portion and the first intermediate header portion, and the second intermediate header portion and the refrigerant outlet header portion, The first intermediate header part and the second intermediate header part are communicated by a plurality of flat hollow body refrigerant flow pipe parts, and the end opposite to the flat hollow body having a refrigerant inlet, a refrigerant outlet, and a throttle hole The evaporator according to the above 4), wherein the evaporator is communicated through a communication passage formed in a flat hollow body disposed in the space.

  According to the evaporator of 1), since the refrigerant supply path for sending the refrigerant before entering the refrigerant inlet into the most downstream intermediate header section from the end on the side where the refrigerant outlet is located is provided. The refrigerant sent into the most downstream intermediate header portion flows in the direction opposite to the gas-liquid two-phase refrigerant flowing from the refrigerant inlet through the evaporator into the most downstream intermediate header portion. The liquid-phase refrigerant in the gas-liquid two-phase refrigerant that has flowed into the most downstream intermediate header portion from the inlet through the evaporator is prevented from drifting to the back side, that is, the side where the refrigerant outlet is located. Therefore, the flow of the refrigerant to the refrigerant flow pipe part that communicates the most downstream intermediate header part and the refrigerant outlet header part is made uniform, and the amount of liquid phase refrigerant flowing through these refrigerant flow pipe parts is the most downstream intermediate header part. It is made uniform in the length direction. As a result, the air discharge temperature, which is the temperature of the blown air that has passed through the ventilation gap between the refrigerant flow pipe portions that are passed through the most downstream intermediate header portion and the refrigerant outlet header portion, is uniform in the length direction of the most downstream intermediate header portion. It becomes. In addition, since the low-dryness refrigerant that has not been subjected to heat exchange before entering the refrigerant inlet is sent into the most downstream intermediate header portion, the refrigerant flow pipe portion that passes through the most downstream intermediate header portion and the refrigerant outlet header portion The heat exchange efficiency in is improved. Moreover, since the refrigerant is only fed into the most downstream intermediate header portion by the refrigerant supply path, the evaporator described in Patent Document 1 in which a plurality of restrictor plates having restriction holes are arranged in the most downstream intermediate header portion. Compared to the above, the passage resistance is reduced, and the performance of the evaporator is prevented from being lowered.

  According to the evaporator of the above 2), since the throttle hole is formed at the end of the most downstream intermediate header portion on the side where the refrigerant outlet is located, it passes through the refrigerant supply path and passes through the throttle hole to the most downstream intermediate. It is possible to limit the inflow amount of the refrigerant having a low dryness sent into the header portion. Therefore, it is possible to prevent an excessive amount of refrigerant flowing into the most downstream intermediate header portion from being excessive and to obtain an appropriate inflow amount, and to pass through the most downstream intermediate header portion and the refrigerant outlet header portion. The heat exchange efficiency in the refrigerant flow pipe part is improved.

  According to the evaporator 4), the refrigerant supply path can be formed relatively easily. In addition, refrigerant refrigerant having a low dryness that has not been subjected to heat exchange before entering the refrigerant inlet is accumulated in the refrigerant supply path formed through the refrigerant inlet and the throttle hole formed by the supply path forming metal plate. . Therefore, even when the refrigeration cycle using this evaporator is stopped, it becomes possible to supply a refrigerant having a low dryness to the refrigerant flow pipe part that is passed through the most downstream intermediate header part and the refrigerant outlet header part. It is possible to prevent a rapid increase in the discharged air temperature, which is the temperature of the blown air that has passed through the ventilation gap between the refrigerant circulation pipe portions.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same part and the same thing through all drawings, and the overlapping description is abbreviate | omitted.

  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 FIGS. 1, 4 and 13 are referred to as the upper and lower sides and the left and right sides, respectively, and the downstream side of the air flowing in the ventilation gap (the direction indicated by the arrow X in FIGS. The other side is the back.

Embodiment 1
This embodiment is shown in FIGS.

  1 to 4 show the entire configuration of the evaporator according to the first embodiment, FIGS. 5 to 9 show the configuration of the main part thereof, and FIG. 10 shows the flow of refrigerant in the evaporator.

  1 to 4, the evaporator (1) has a plurality of flat rectangular hollow bodies (2A), (2B), (2C), (2D), and (2E) with the width direction directed in the front-rear direction (ventilation direction). The refrigerant inlet header portion (3) that extends in the left and right direction and is joined to each other, is formed in the left and right direction, and the rear side of the refrigerant inlet header portion (3) (the ventilation direction) A refrigerant outlet header portion (4) extending in the left-right direction provided on the upstream side, a first intermediate header portion (5) extending in the left-right direction provided below the refrigerant inlet header portion (3), and a first intermediate A second intermediate header portion (6) extending in the left-right direction provided continuously to the left of the header portion (5), and to the left of the refrigerant inlet header portion (3) above the second intermediate header portion (6) A third intermediate header portion (7) extending in the left-right direction provided in series and a rear side of the refrigerant outlet header portion (4) on the rear side of the third intermediate header portion (7). A fourth intermediate header portion (8) extending in the left-right direction, a fifth intermediate header portion (9) extending in the left-right direction provided below the fourth intermediate header portion (8), and a fifth intermediate header A sixth intermediate header portion (11) (the most downstream side intermediate header portion in the refrigerant flow direction) that extends to the right of the portion (9) and extends in the left-right direction provided below the refrigerant outlet header portion (4). (See FIG. 10). A refrigerant inlet (12) is formed at the right end of the refrigerant inlet header (3), and a refrigerant outlet (13) is formed at the right end of the refrigerant outlet header (4). The refrigerant inlet (14a) leading to the refrigerant inlet (12) and the refrigerant outlet (13) leading to the refrigerant outlet (13) so as to straddle the right end of the refrigerant inlet header (3) and the refrigerant outlet header (4) ( An aluminum joint plate (14) having 14b) is joined, a refrigerant inlet pipe (not shown) is connected to the refrigerant inlet (14a) of the joint plate (14), and a refrigerant outlet pipe (not shown) is connected to the refrigerant outlet (14b). ) Are connected to each other.

  As shown in FIGS. 2 to 5, the flat hollow body (2A) (2B) (2C) (2D) (2E) is composed of two vertical rectangular aluminum plates (15A) whose peripheral portions are brazed to each other. (15B) (15C) (15D). All the aluminum plates (15A), (15B), (15C), and (15D) are made of aluminum brazing sheets having brazing material layers on both sides, and have the same outer shape when viewed from the left and right. Between the two aluminum plates (15A), (15B), (15C), and (15D) that make up the flat hollow body (2A) (2B) (2C) (2D) (2E) Protruding refrigerant flow pipe portions (16), (17), and bulged header forming portions (18), (19) respectively connected to the upper and lower ends of each refrigerant flow pipe portion (16), (17) are provided. . Made of aluminum so as to straddle the refrigerant flow pipe sections (16) and (17) before and after most flat hollow bodies (2A) (2B) (2D) (2E) excluding some flat hollow bodies (2C) Corrugated inner fins (21) are arranged and brazed to both aluminum plates (15A) (15B) (15D). An aluminum corrugated inner fin may be separately arranged in each refrigerant flow pipe section (16) (17).

  The horizontal height of the header forming portion (18) (19) in the flat hollow body (2A) (2B) (2C) (2D) (2E) is the horizontal height of the refrigerant flow pipe portion (16) (17). The header forming portions (18) and (19) of adjacent flat hollow bodies (2A), (2B), (2C), (2D), and (2E) are brazed to each other. By the upper and lower header forming portions (18) on the front side of the flat hollow body (2A) (2B) (2C) (2D) (2E), the refrigerant inlet header portion (3) and the first to third intermediate header portions (5) to (7) is formed, and the refrigerant outlet header portion (4) and the fourth to sixth intermediate header portions (8) to (11) are also formed by the upper and lower header forming portions (19) on the rear side. Also, the space between adjacent refrigerant hollow pipes (2A) (2B) (2C) (2D) (2E) refrigerant flow pipe sections (16) (17) is a ventilation gap, and an aluminum corrugated outer fin is provided in the ventilation gap. (22) is placed and brazed to the flat hollow bodies (2A) (2B) (2C) (2D) (2E), and heat exchange is performed between the refrigerant flow pipe sections (16) (17) and the outer fins (22). A core part is formed.

  Except for the flat hollow body (2C) arranged at the right end and the flat hollow body (2E) arranged at the center in the left-right direction, the refrigerant inlet header (3), the refrigerant outlet header (4), the first intermediate header The configuration of the first flat hollow body (2A) forming the portion (5) and the sixth intermediate header portion (11) is shown in FIG. As shown in FIG. 6, the right aluminum plate (15A) constituting the first flat hollow body (2A) extends in the up-down direction and bulges to the right and left two tube-forming bulges (23 ) And four header formations that are connected to the upper and lower ends of each bulge portion for pipe formation (23) and bulge to the right and have a higher bulge height than the bulge section for pipe portion formation (23). And a bulging portion (24) for use. The entire top wall of each header forming bulge portion (24) is punched to form a through hole (25). The left aluminum plate (15A) constituting the first flat hollow body (2A) is the right aluminum plate (15A) reversed left and right, and the same portions are denoted by the same reference numerals. Then, the first flat hollow body is brazed by combining two aluminum plates (15A) in such a way that the openings of the bulging portions (23) and (24) face each other through the inner fin (21). (2A) is formed. Further, the header forming portions (18), (19) of the two adjacent first flat hollow bodies (2A) are connected to the leading end of the header forming bulging portion (24) of one of the first flat hollow bodies (2A). Are slightly squeezed and brazed to each other in a state of being press-fitted into the through hole (25) of the bulging portion (24) for forming the header of the other first flat hollow body (2A). The header forming portions (18) and (19) of the first flat hollow body (2A) are joined in a continuous manner.

  Except for the flat hollow body (2D) arranged at the left end and the flat hollow body (2E) arranged at the center in the left-right direction, the second intermediate header part (6), the third intermediate header part (7), the fourth The structure of the 2nd flat hollow body (2B) which forms an intermediate header part (8) and a 5th intermediate header part (9) is shown in FIG. As shown in FIG. 7, the portion between the upper two header forming bulges (24) in the right aluminum plate (15B) of the second flat hollow body (2B) has a header forming bulge (24 ) And a communication passage forming bulge portion (26) bulged outwardly so as to be slightly lower than the two), and the two header formation bulge portions (24) are connected to each other. It is made to communicate by the exit part (26). The left aluminum plate (15B) of the second flat hollow body (2B) is obtained by reversing the right aluminum plate (15B) in the left-right direction. A bulging communication path (27) that allows the upper two header formation parts (18) and (19) to pass through is formed by the communication path forming bulging part (26) of both aluminum plates (15B). The other configuration of the second flat hollow body (2B) is the same as that of the first flat hollow body (2A) shown in FIG. 6, and the header forming portions (18) of two adjacent second flat hollow bodies (2B) (19) The two are joined in a continuous manner as in the case of the adjacent first flat hollow bodies (2A).

  The configuration of the third flat hollow body (2C) arranged at the right end is shown in FIG. As shown in FIG. 8, the right aluminum plate (15C) constituting the third flat hollow body (2C) at the right end is not formed with a bulging portion for forming a pipe portion and a bulging portion for forming a header, The whole is flat. Accordingly, the height in the left-right direction of the refrigerant flow pipe portions (16), (17) of the third flat hollow body (2C) is the refrigerant flow pipe portion (16) of the first and second flat hollow bodies (2A), (2B). The height in the left-right direction of the header forming portions (18), (19) is also lower than the height in the left-right direction of (17), and the header forming portions of the first and second flat hollow bodies (2A), (2B) ( 18) It is lower than the horizontal height of (19). Further, a refrigerant inlet (12) is formed in a penetrating manner in a portion corresponding to the front header bulging portion (24) of the upper end portion of the first flat hollow body (15A) at the upper end portion of the right aluminum plate (15C). Similarly, a refrigerant outlet (13) is formed in a penetrating manner at a portion corresponding to the bulging portion (24) for forming the header on the rear side of the upper end portion. Further, a throttle hole (28) penetrates a portion corresponding to the header forming bulge portion (24) on the rear side of the lower end portion of the first flat hollow body (15A) at the lower end portion of the right aluminum plate (15C). It is formed in a shape. Deform the top wall of the bulging side top wall of the two bulging portions (23) for forming the pipe portion on the left and right aluminum plates (15D) constituting the third flat hollow body (2C) at the right end. Thus, a plurality of ribs (29) extending in the vertical direction and protruding rightward and having protruding end portions joined to the right aluminum plate (15C) are formed at intervals in the front-rear direction. Therefore, no inner fin is arranged in the third flat hollow body (2C). The other structure of the left aluminum plate (15D) is the same as that of the left aluminum plate (15A) of the first flat hollow body (2A), and the header forming portions (18), (19) of the third flat hollow body (2C) The header forming portions (18) and (19) of the first flat hollow body (2A) adjacent to the left are joined in a communication manner in the same manner as in the case of the adjacent first flat hollow body (2A).

  Similarly, as shown in FIG. 8, the right side aluminum of the third flat hollow body (2C), that is, the outside of the third flat hollow body (2C) having the refrigerant inlet (12), the refrigerant outlet (13), and the throttle hole (28). A supply path forming aluminum plate (31) formed of an aluminum brazing sheet having a brazing filler metal layer on both sides on the outer surface of the plate (15C) and forming a refrigerant supply path through the refrigerant inlet (12) and the throttle hole (28). ) Is brazed. In the upper end portion of the first flat hollow body (15A) at the upper end portion of the supply path forming aluminum plate (31), the portions corresponding to the front and rear header forming bulge portions (24) are respectively provided with header forming bulge portions. An upper right bulge portion (32) having a bulge height lower than (24) is formed. Refrigerant passage holes (33) and (34) smaller than the through holes (25) of the first flat hollow body (2A) are formed in the top walls of the front and rear upper right bulging portions (32) in a penetrating manner. ing. The refrigerant passage hole (33) of the front upper right bulge portion (32) is smaller than the refrigerant passage hole (34) of the rear upper right bulge portion (32). Around the refrigerant passage hole (33) (34) on the top wall of the upper right bulge portion (32), flange portions (35) (36) protruding rightward are integrally formed over the entire circumference. Yes. In addition, a portion corresponding to the header forming bulge portion (24) on the rear side of the lower end portion of the first flat hollow body (15A) at the lower end portion of the supply path forming aluminum plate (31) has an upper right bulge. A lower right bulging portion (37) having the same bulging height as the protruding portion (32) is formed so as to include the throttle hole (28) of the third flat hollow body (15C). Further, the supply path forming aluminum plate (31) has the same bulging height as the front upper right bulging portion (32) and the lower right bulging portion (37) at the upper end and both right bulging portions. The right bulging portion (38) for the supply path that is continuous with the portions (32) and (37) is formed, and the opening of the right bulging portion for the supply path (38) is the right side of the third flat hollow body (2C) By being blocked by the aluminum plate (15C), the third flat hollow body (2C) is passed through the refrigerant inlet (12) and the throttle hole (28), and the refrigerant before entering the refrigerant inlet (12) is A refrigerant supply path (39) that feeds into the sixth intermediate header part (11) through the throttle hole (28) from the right end part side where the refrigerant outlet (13) in the intermediate header part (11), that is, the most downstream intermediate header part is formed. ) Is formed.

  In addition, both flange portions (35), (36) of the supply path forming aluminum plate (31) are inserted into the refrigerant inlet (14a) and the refrigerant outlet (14b) of the pipe joint plate (14). The pipe joint plate (14) is brazed to the supply path forming aluminum plate (31).

  Although not shown in detail, the left aluminum plate (15E) constituting the fourth flat hollow body (2D) arranged at the left end has the bulging height of all the header forming bulges (24). It is equal to the bulging height of the bulging portion (23) for forming the pipe portion. Therefore, the height in the left-right direction of the header forming portions (18), (19) of the fourth flat hollow body (2D) is the same as the header forming portions (18) of the first and second flat hollow bodies (2A), (2B). It is lower than the horizontal height of 19). Further, no through hole is formed in the top wall of the four header forming bulges (24) in the left aluminum plate (15E). The other configuration of the fourth flat hollow body (2D) disposed at the left end is the same as that of the second flat hollow body (2B) shown in FIG. 7, and the header forming portion (18 ) (19) and the header forming part (18) (19) of the second flat hollow body (2B) adjacent to the right side are connected in the same manner as in the case of the adjacent first flat hollow body (2A). It is joined.

  FIG. 9 shows the configuration of the fifth flat hollow body (2E) arranged at the center in the left-right direction. As shown in FIG. 9, the top wall of the bulging portion (23) for forming the tube portion in both aluminum plates (15 F) constituting the fifth flat hollow body (2 E) is dented inwardly. A plurality of ribs (41) extending in the vertical direction and projecting inward are formed at intervals in the front-rear direction. The protruding height of the rib (41) is equal to the protruding height of the tube portion forming bulge portion (23). In addition, a vertically rectangular aluminum flat plate (42) is interposed between both aluminum plates (15F), and the peripheral portion of the flat plate (42) is sandwiched between the peripheral portions of both aluminum plates (15F). It is brazed to both aluminum plates (15F). Further, the tips of the ribs (41) of both aluminum plates (15F) are brazed to the flat plate (42). The positions corresponding to the two through holes (25) on the lower side of the aluminum plate (15A) of the first flat hollow body (2A) at the lower end of the flat plate (42) are respectively the same size as the through holes (25). The through hole (43) is formed. In addition, the inner fin is not arrange | positioned in a 5th flat hollow body (2E). The other configuration of the fifth flat hollow body (2E) is the same as that of the first flat hollow body (2A) shown in FIG. 6, and the header forming portions (18), (19) of the fifth flat hollow body (2E) The header forming portions (18) and (19) of the first flat hollow body (2A) adjacent to the right side and the header forming portions (18) and (19) of the second flat hollow body (2B) adjacent to the left side are adjacent to each other. As in the case of the first flat hollow body (2A), it is joined in a continuous manner. The flat plate (42) partitions the refrigerant inlet header (3) and the third intermediate header (7), and the refrigerant outlet header (4) and the fourth intermediate header (8). The through hole (43) communicates the first intermediate header part (5) and the second intermediate header part (6), and the fifth intermediate header part (9) and the sixth intermediate header part (11). Yes.

  The refrigerant inlet header (3) and the first intermediate header (5), and the second intermediate header (6) and the third intermediate header (7) are flat hollow bodies (2A) (2B) (2C), respectively. (2D) and (2E) are connected to each other by a refrigerant flow pipe section (16) on the front side, and a refrigerant outlet header section (4) and a sixth intermediate header section (11), and a fourth intermediate header section (8) and a fifth The intermediate header portion (9) is in communication with the refrigerant flow pipe portion (17) on the rear side of the flat hollow bodies (2A), (2B), (2C), (2D), and (2E). Moreover, the 3rd intermediate header part (7) and the 4th intermediate header part (8) are connected via the communication path (27) formed in the 2nd flat hollow body (2B). The refrigerant inlet header (3) communicates with the refrigerant inlet (12), the refrigerant outlet header (4) communicates with the refrigerant outlet (13), and the first intermediate header (5) includes the second intermediate header ( 6), the fifth intermediate header portion (9) communicates with the sixth intermediate header portion (11). And the 1st refrigerant distribution path (P1) which consists of a plurality of refrigerant distribution pipe parts (16) is provided between the refrigerant inlet header part (3) and the 1st intermediate header part (5), and the 2nd intermediate header part A second refrigerant flow path (P2) comprising a plurality of refrigerant flow pipe parts (16) is provided between (6) and the third intermediate header part (7), and the fourth intermediate header part (8) and the fifth intermediate header part (5) A third refrigerant flow path (P3) comprising a plurality of refrigerant flow pipe portions (17) is provided between the intermediate header portion (9), a sixth intermediate header portion (11), a refrigerant outlet header portion (4), A final refrigerant circulation path (P4) composed of a plurality of refrigerant circulation pipe sections (17) is provided between them.

  The evaporator (1) is manufactured by temporarily fastening a combination of the constituent members and brazing all the constituent members together.

  The evaporator (1) is housed in a case disposed in a vehicle interior of a vehicle, for example, an automobile, constitutes a refrigeration cycle together with a compressor and a condenser, and is used as a car air conditioner.

  In the above-described evaporator (1), as shown in FIG. 10, the gas-liquid two-phase refrigerant having a low dryness that has passed through the compressor, the condenser, and the expansion valve (decompression means) is supplied from the inlet pipe to the pipe joint plate (14). Enters the refrigerant inlet header (3) through the refrigerant inlet (14a), the refrigerant passage hole (33) of the supply path forming aluminum plate (31), and the refrigerant inlet (12). Also, the gas-liquid mixed phase two-phase refrigerant passes through the refrigerant inlet (14a) and the refrigerant passage hole (33) of the pipe joint plate (14) from the inlet pipe, and the refrigerant supply path of the aluminum plate (31) for forming the supply path It enters into the right bulging part (38) for use, that is, into the refrigerant supply passage (39) of the third flat hollow body (2C), and is stored here.

  The refrigerant flowing into the refrigerant inlet header (3) is divided while flowing leftward in the refrigerant inlet header (3), and forms a first refrigerant flow path (P1). Flows into the refrigerant flow pipe part (16), flows downward into the first intermediate header part (5), merges, flows to the left inside, and passes through the through hole (43) 2 Enter the intermediate header (6). The refrigerant that has flowed into the second intermediate header portion (6) is divided while flowing to the left inside the second intermediate header portion (6), and flows into the refrigerant flow pipe portion (16) constituting the second refrigerant flow path (P2). It flows upward in the refrigerant flow pipe part (16) and enters the third intermediate header part (7). The refrigerant flowing into the third intermediate header portion (7) passes through the communication path (27) of the second flat hollow body (2B) and enters the fourth intermediate header portion (8), and enters the third refrigerant distribution path ( P3) flows into the refrigerant flow pipe portion (17), flows downward through the refrigerant flow pipe portion (17), and enters the fifth intermediate header portion (9). The refrigerant that has entered the fifth intermediate header portion (9) flows to the right through the inside, enters the sixth intermediate header portion (11) through the through hole (43), and flows to the right through the inside. The refrigerant flows into the refrigerant distribution pipe (17) constituting the final refrigerant distribution path (P4), flows upward in the refrigerant distribution pipe (17), and enters the refrigerant outlet header (4). . The refrigerant that has flowed into the refrigerant outlet header (4) includes the refrigerant outlet (13), the refrigerant passage hole (34) of the aluminum plate for supply passage (31), and the refrigerant outlet (14b) of the pipe joint plate (14). Through the exit pipe and out of the exit pipe. Then, while flowing through the refrigerant flow pipe portions (16), (17) of the flat hollow bodies (2A) (2B) (2C) (2D) (2E), the ventilation gap is the direction indicated by the arrow X in FIGS. It exchanges heat with the air flowing through it and flows out as a gas phase.

  Here, the gas-liquid two-phase refrigerant having a low dryness stored in the refrigerant supply path (39) of the third flat hollow body (2C) passes through the throttle hole (28), and the sixth intermediate header (11). Of the gas-liquid two-phase refrigerant having a high degree of dryness, which is fed into the interior of the refrigerant and flows into the sixth intermediate header portion (11) from the third refrigerant distribution path (P3) through the fifth intermediate header portion (9). Flow in the direction. Therefore, the liquid-phase refrigerant in the gas-liquid two-phase refrigerant having high dryness flowing into the sixth intermediate header portion (11) from the third refrigerant distribution path (P3) through the fifth intermediate header portion (9) is (Right side), that is, it is prevented from drifting to the side where the refrigerant outlet (13) is formed, and the flow of refrigerant to all the refrigerant flow pipe parts (17) constituting the final refrigerant flow path (P4) is made uniform. Is done. Therefore, the amount of liquid-phase refrigerant flowing through the final refrigerant distribution path (P4) is made uniform in the length direction of the sixth intermediate header section (11), and the refrigerant distribution pipe section (17) adjacent to the final refrigerant distribution path (P4). The discharged air temperature, which is the temperature of the blown air that has passed through the ventilation gap, is made uniform in the length direction of the sixth intermediate header portion (11). In addition, since the gas-liquid two-phase refrigerant having a low dryness that has not been used for heat exchange before entering the refrigerant inlet (12) is sent into the sixth intermediate header (11), the final refrigerant circulation path (P4) Heat exchange efficiency is improved. Furthermore, in the refrigerant supply path (39) formed in the third flat hollow body (2C), a gas-liquid two-phase refrigerant having a low dryness that has not been subjected to heat exchange before entering the refrigerant inlet (12). Therefore, even when the refrigeration cycle using this evaporator (1) is stopped, it becomes possible to supply a low dryness refrigerant to the final refrigerant circulation path (P4), and the final refrigerant circulation path (P4 ) Can be prevented from rapidly increasing, which is the temperature of the blown air that has passed through the ventilation gap.

Embodiment 2
This embodiment is shown in FIGS.

  FIGS. 11-14 shows the structure of the principal part of the evaporator of Embodiment 2, and FIG. 15 shows the flow of the refrigerant | coolant in an evaporator.

  11 to 13, the evaporator (50) is formed by laminating a plurality of flat rectangular hollow bodies (51A) (51B) (51C) in the left-right direction with the width direction in the front-rear direction (ventilation direction). The refrigerant inlet header portion (52) extending in the left-right direction and the rear side of the refrigerant inlet header portion (52) (upstream side in the ventilation direction) are formed by being aligned and joined to each other. The refrigerant outlet header (53) extending in the left-right direction, the first intermediate header (54) extending in the left-right direction provided below the refrigerant inlet header (52), and the lower part of the refrigerant outlet header (53) 2 includes a second intermediate header portion (55) (the most downstream intermediate header portion) extending in the left-right direction provided on the rear side of the first intermediate header portion (54) (see FIG. 15).

  The first flat hollow body (51A) other than the flat hollow bodies (51B) (51C) disposed at the right end and the left end is the same as the first flat hollow body (2A) of the evaporator (1) of the first embodiment. It is a structure and the same code | symbol is attached | subjected to the same part. The 2nd flat hollow body (51B) arrange | positioned at the right end is the same structure as the 3rd flat hollow body (2C) of the evaporator (1) of Embodiment 1, and attaches | subjects the same code | symbol to the same part. Further, although not shown in detail, on the right side surface of the second flat hollow body (51B) disposed at the right end, the supply path forming aluminum plate (31) is provided in the same manner as the evaporator (1) of the first embodiment. A refrigerant supply path (39) is formed in the second flat hollow body (51B) through the refrigerant inlet (12) and the throttle hole (28). In addition, both flange portions (35), (36) of the supply path forming aluminum plate (31) are inserted into the refrigerant inlet (14a) and the refrigerant outlet (14b) of the pipe joint plate (14). The pipe joint plate (14) is brazed to the supply path forming aluminum plate (31). A refrigerant inlet pipe (not shown) is connected to the refrigerant inlet (14a) of the joint plate (14), and a refrigerant outlet pipe (not shown) is connected to the refrigerant outlet (14b).

  The configuration of the third flat hollow body (51C) disposed at the left end is shown in FIG. As shown in FIG. 14, a header forming bulge is provided between the lower two header forming bulges (24) in the right aluminum plate (56A) constituting the third flat hollow body (51C). The communication passage forming bulge portion (57) bulged outwardly to be slightly lower than (24) is formed, and the two header forming bulge portions (24) are formed as a communication passage. It is made to communicate by the bulging part (57) for a use. The bulging heights of the four header forming bulging portions (58) of the left aluminum plate (56B) constituting the third flat hollow body (51C) are the same as the bulging height of the tube forming bulging portion (23). In addition, the top wall is not formed with a through hole. In addition, the portion between the two header forming bulges (58) under the left aluminum plate (56B) is bulged outward so as to be the same height as the header forming bulge (58). The communication passage forming bulging portion (59) is formed, and the two header forming bulging portions (58) are communicated by the communication passage forming bulging portion (59). Then, the communication channel forming bulging portion (57) of the right aluminum plate (56A) and the communication channel forming bulging portion (59) of the left aluminum plate (56B) A bulging communication path (60) is formed through which the two lower header forming sections (18), (19) communicate with each other. The other configuration of the third flat hollow body (51C) is the same as that of the first flat hollow body (2A) of Embodiment 1 shown in FIG. 6, and the same portions are denoted by the same reference numerals. The header forming portions (18) and (19) of the third flat hollow body (56C) and the first flat hollow body (51A) on the right side thereof are the same as in the case of the adjacent first flat hollow body (2A). They are joined in a continuous manner.

  The refrigerant inlet header part (52) and the first intermediate header part (54) are communicated with each other by the refrigerant flow pipe part (16) on the front side of the flat hollow body (51A) (51B) (51C), and the refrigerant outlet header part ( 53) and the second intermediate header portion (55) are communicated with each other by a refrigerant flow pipe portion (17) on the rear side of the flat hollow bodies (51A) (51B) (51C). Further, the first intermediate header portion (54) and the second intermediate header portion (55) are communicated at the left end portion via a communication path (60) formed in the third flat hollow body (51C). . The refrigerant inlet header (52) communicates with the refrigerant inlet (12) and the refrigerant outlet header (53) communicates with the refrigerant outlet (13). A first refrigerant flow path (P1) comprising a plurality of refrigerant flow pipe portions (16) is provided between the refrigerant inlet header portion (52) and the first intermediate header portion (54), and the second intermediate header portion. A final refrigerant flow path (P2) including a plurality of refrigerant flow pipe parts (17) is provided between (6) and the refrigerant outlet header part (53).

  The evaporator (1) is manufactured by temporarily fastening a combination of the constituent members and brazing all the constituent members together.

  The evaporator (50) is housed in a case disposed in a vehicle interior of a vehicle, for example, an automobile, constitutes a refrigeration cycle together with a compressor and a condenser, and is used as a car air conditioner.

  In the above-described evaporator (50), as shown in FIG. 15, the gas-liquid two-phase refrigerant having low dryness that has passed through the compressor, the condenser, and the expansion valve (decompression means) is supplied from the inlet pipe to the pipe joint plate (14). Enters the refrigerant inlet header (52) through the refrigerant inlet (14a), the refrigerant passage hole (33) of the supply path forming aluminum plate (31) and the refrigerant inlet (12). Also, the gas-liquid mixed phase two-phase refrigerant passes through the refrigerant inlet (14a) and the refrigerant passage hole (33) of the pipe joint plate (14) from the inlet pipe, and the refrigerant supply path of the aluminum plate (31) for forming the supply path It enters into the right bulging part (38) for use, that is, into the refrigerant supply passage (39) of the third flat hollow body (51C) and is stored here.

  The refrigerant flowing into the refrigerant inlet header section (52) is divided while flowing leftward in the refrigerant inlet header section (52), and forms a first refrigerant distribution path (P1). Flows into the refrigerant flow pipe portion (16), enters the first intermediate header portion (54) and merges, flows to the left inside the first intermediate header portion (54), and passes through the communication passage (60). 2 Enter the intermediate header section (55). The refrigerant that has flowed into the second intermediate header portion (55) is diverted while flowing to the right inside the second intermediate header portion (55), and flows into the refrigerant flow pipe portion (17) constituting the final refrigerant flow path (P2). It flows upward in the circulation pipe part (17) and enters the refrigerant outlet header part (53). The refrigerant that has flowed into the refrigerant outlet header (53) includes the refrigerant outlet (13), the refrigerant passage hole (34) of the aluminum plate for supply passage (31), and the refrigerant outlet (14b) of the pipe joint plate (14). Through the exit pipe and out of the exit pipe. And while flowing through the refrigerant flow pipe parts (16), (17) of the flat hollow bodies (51A) (51B) (51C), heat exchange with the air flowing through the ventilation gap in the direction indicated by the arrow X in FIG. It flows out in the gas phase.

  Here, the gas-liquid two-phase refrigerant having a low dryness stored in the refrigerant supply path (39) of the third flat hollow body (51C) passes through the throttle hole (28), and the second intermediate header portion (55). Of the gas-liquid two-phase refrigerant having a high degree of dryness flowing into the second intermediate header portion (55) from the first refrigerant flow path (P1) through the first intermediate header portion (54). Flows in the direction, that is, to the left. Therefore, the liquid-phase refrigerant in the gas-liquid two-phase refrigerant having high dryness flowing into the second intermediate header portion (55) from the first refrigerant distribution path (P1) through the first intermediate header portion (54) (Right side), that is, it is prevented from drifting to the side where the refrigerant outlet (13) is formed, and the flow of refrigerant to all the refrigerant flow pipe parts (17) constituting the final refrigerant flow path (P2) is made uniform. Is done. Therefore, the amount of liquid refrigerant flowing through the final refrigerant distribution path (P2) is made uniform in the length direction of the second intermediate header section (55), and the refrigerant distribution pipe section (17) adjacent to the final refrigerant distribution path (P2). The discharged air temperature, which is the temperature of the blown air that has passed through the ventilation gap, is made uniform in the length direction of the second intermediate header portion (55). In addition, since the gas-liquid two-phase refrigerant with low dryness that has not been used for heat exchange before entering the refrigerant inlet (12) is sent into the second intermediate header (55), the final refrigerant circulation path (P2) Heat exchange efficiency is improved. Further, in the refrigerant supply path (39) formed in the second flat hollow body (51B), a gas-liquid two-phase refrigerant having a low dryness that has not been subjected to heat exchange before entering the refrigerant inlet (12). Therefore, even when the refrigeration cycle using the evaporator (50) is stopped, it becomes possible to supply a low-dryness refrigerant to the final refrigerant circulation path (P2), and the final refrigerant circulation path (P2 ) Can be prevented from rapidly increasing, which is the temperature of the blown air that has passed through the ventilation gap.

  In the two embodiments described above, the refrigerant inlet header part, the refrigerant outlet header part and the intermediate header part, and the refrigerant flow pipe part are composed of two vertically rectangular aluminum plates whose peripheral parts are brazed to each other. A plurality of flat hollow bodies are formed by being laminated in the left-right direction with the width direction directed in the front-rear direction, and are formed by being joined to each other. A refrigerant flow pipe portion made of a flat tube may be connected to the refrigerant inlet header portion, the refrigerant outlet header portion, and the intermediate header portion formed separately from the portion.

It is a perspective view which shows the whole structure of the evaporator of Embodiment 1 to which the heat exchanger of this invention is applied. It is the AA line expanded sectional view which abbreviate | omitted a part of FIG. It is the BB line expanded sectional view which abbreviate | omitted some of FIG. FIG. 3 is a cross-sectional view taken along the line CC in which a part of FIG. 2 is omitted. FIG. 2 is a cross-sectional view of a portion of a refrigerant flow pipe portion of most flat hollow bodies used in the evaporator of FIG. 1. It is a disassembled perspective view of the 1st flat hollow body used for the evaporator of FIG. It is a disassembled perspective view of the 2nd flat hollow body used for the evaporator of FIG. It is a disassembled perspective view which shows the 3rd flat hollow body used for the evaporator of FIG. 1, the aluminum plate for supply path formation, and a pipe joint plate. It is a disassembled perspective view which shows the 5th flat hollow body used for the evaporator of FIG. It is a figure which shows the flow of the refrigerant | coolant in the evaporator of FIG. It is a figure equivalent to FIG. 2 which shows the evaporator of Embodiment 2 to which the heat exchanger of this invention is applied. It is a figure equivalent to FIG. 3 which shows the evaporator of Embodiment 2 to which the heat exchanger of this invention is applied. FIG. 12 is a cross-sectional view taken along the line DD in which a part of FIG. 11 is omitted. It is a disassembled perspective view of the 3rd flat hollow body used for the evaporator of FIG. It is a figure which shows the flow of the refrigerant | coolant in the evaporator of FIG.

Explanation of symbols

(1) (50): Evaporator
(2A) (2B) (2C) (2D) (2E) (51A) (51B) (51C): Flat hollow body
(3) (52): Refrigerant inlet header
(4) (53): Refrigerant outlet header
(5) (6) (7) (8) (9) (11) (54) (55): Intermediate header
(12): Refrigerant inlet
(13): Refrigerant outlet
(15A) (15B) (15C) (15D) (15E) (15F) (56A) (56B): Aluminum plate (metal plate)
(16) (17): Refrigerant distribution pipe
(18) (19): Header forming part
(27): Communication passage
(28): Aperture hole
(31): Supply path forming aluminum plate (supply path forming metal plate)
(39): Refrigerant supply path
(60): Communication passage

Claims (6)

A refrigerant inlet header comprising a refrigerant inlet header portion, a refrigerant outlet header portion, a plurality of intermediate header portions, and a heat exchange core portion having a plurality of refrigerant flow pipe portions arranged in the same direction in the length direction. A refrigerant inlet is formed in the portion, at least one end of the refrigerant outlet header is positioned at the outer end in the width direction of the heat exchange core, and a refrigerant outlet is formed in the one end, and the refrigerant inlet header and the refrigerant flow The uppermost stream side intermediate header part in the direction is provided at an interval, and both header parts are communicated by a plurality of refrigerant flow pipe parts, and the refrigerant outlet header part and the most downstream side intermediate header part in the refrigerant flow direction are When both the header portions are communicated with each other by a plurality of refrigerant flow pipe portions and the refrigerant flows into the most downstream intermediate header portion from the end opposite to the side where the refrigerant outlet is located. Moni, the most downstream side intermediate header portion in the evaporator was made to flow toward the end on the side which is located a refrigerant outlet,
An evaporator provided with a refrigerant supply path for sending refrigerant before entering the refrigerant inlet from the end on the side where the refrigerant outlet is located into the most downstream intermediate header. A throttle hole is formed at the end of the most downstream intermediate header portion on the side where the refrigerant outlet is located, and the refrigerant before entering the refrigerant inlet passes through the refrigerant supply path and passes through the throttle hole into the most downstream intermediate header portion. The evaporator according to claim 1, wherein the evaporator is sent. The refrigerant inlet header and the refrigerant outlet header are arranged side by side in the ventilation direction, and the refrigerant inlet and the refrigerant outlet are formed at the same end of the refrigerant inlet header and the refrigerant outlet header. The evaporator according to claim 2, wherein a throttle hole is formed at an end portion on a side where the refrigerant inlet and the refrigerant outlet are located. A swelled refrigerant circulation pipe part composed of two vertically long metal plates whose peripheral parts are joined to each other and arranged in the ventilation direction between both metal plates, and a swelled header formed at both ends of the refrigerant circulation pipe part The plurality of flat hollow bodies provided with the portions are arranged in a stacked manner in the width direction in the ventilation direction, and the header forming portions of the adjacent flat hollow bodies are joined to each other, and the refrigerant flow of the adjacent flat hollow bodies The gap between the pipe parts becomes a ventilation gap, and the refrigerant inlet header part, the refrigerant outlet header part, and the plurality of intermediate header parts are formed by the header forming part of the flat hollow body, and the heat exchange core part is formed by the refrigerant flow pipe part of the flat hollow body Is formed, a refrigerant inlet, a refrigerant outlet and a throttle hole are formed in a flat hollow body arranged at one end in the width direction of the heat exchange core part, and outside the flat hollow body having a refrigerant inlet, a refrigerant outlet and a throttle hole, Refrigerant inlet and Ri hole and an evaporator according to claim 3, wherein the supply path forming metal plate is bonded to form a coolant supply passage establishing communication. A refrigerant inlet header part, a refrigerant outlet header part arranged upstream of the refrigerant inlet header part in the ventilation direction, a first intermediate header part arranged below the refrigerant inlet header part, and a side of the first intermediate header part The second intermediate header portion arranged side by side, the third intermediate header portion arranged side by side above the second intermediate header portion and on the side of the refrigerant inlet header portion, and the ventilation direction of the third intermediate header portion A fourth intermediate header portion arranged upstream and on the side of the refrigerant outlet header portion; a fifth intermediate header portion arranged below the fourth intermediate header portion; and below the refrigerant outlet header portion; A sixth intermediate header portion arranged side by side on the side of the fifth intermediate header portion, and the first intermediate header portion becomes the most upstream side intermediate header portion in the refrigerant flow direction, and the sixth intermediate header portion Becomes the most downstream intermediate header part in the refrigerant flow direction, The medium inlet header portion, the first intermediate header portion, the second intermediate header portion, and the third intermediate header portion are each formed by the downstream-side header forming portion of the flat hollow body, and the refrigerant outlet header portion and the fourth intermediate header portion The fifth intermediate header portion and the sixth intermediate header portion are formed by the upstream hollow header forming portion of the flat hollow body, respectively, and the refrigerant inlet header portion and the first intermediate header portion, the second intermediate header portion and the third intermediate portion The header portion, the fourth intermediate header portion and the fifth intermediate header portion, and the sixth intermediate header portion and the refrigerant outlet header portion are communicated with each other by a plurality of flat hollow refrigerant circulation pipe portions, and a third intermediate header. The evaporator according to claim 4, wherein the first portion and the fourth intermediate header portion are communicated with each other via a communication passage formed in a flat hollow body. A refrigerant inlet header portion, a refrigerant outlet header portion arranged upstream of the refrigerant inlet header portion in the ventilation direction, a first intermediate header portion arranged below the refrigerant inlet header portion, a lower portion of the refrigerant outlet header portion, and A second intermediate header portion disposed upstream of the first intermediate header portion in the ventilation direction, and the first intermediate header portion becomes the most upstream intermediate header portion in the refrigerant flow direction, and the second intermediate header portion Becomes the most downstream intermediate header portion in the refrigerant flow direction, and the refrigerant inlet header portion and the first intermediate header portion are respectively formed by the downstream hollow header forming portion of the flat hollow body, and the refrigerant outlet header portion and the second intermediate header portion Are formed by the upstream hollow header forming portion of the flat hollow body, and the refrigerant inlet header portion and the first intermediate header portion, and the second intermediate header portion and the refrigerant outlet header portion, respectively. The first intermediate header portion and the second intermediate header portion are communicated by a plurality of flat hollow body refrigerant flow pipe portions, and the end portion on the opposite side of the flat hollow body having the refrigerant inlet, the refrigerant outlet, and the throttle hole. The evaporator according to claim 4, wherein the evaporator is communicated via a communication path formed in the flat hollow body disposed.

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