JP2012047438A - Evaporator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an evaporator capable of improving cooling performance.SOLUTION: A leeward tube row 11 of this evaporator 1 is provided with first to third tube groups 11A, 11B, 11C, and a windward tube row 12 thereof is provided with fourth and fifth tube groups. Within a third section 17 of a leeward upper header portion 5 with which heat exchange tubes 9 of the third tube group 11C communicate, a resistance member 36 for flow division is provided so as to divide the interior of the third section 17 into a first space 38 which the heat exchange tubes 9 face, and a second space 37 which is separated from the first space 38 and into which refrigerant flows, and a plurality of refrigerant passage holes 39 are formed on the resistance member 36 for flow division. The leeward upper header portion 5 has a flow cutoff member 41 for preventing flow of the refrigerant into the first space 38 of the third section 17. The third section 17 of the leeward upper header portion 5 communicates with a fourth section of the windward upper header portion 6 via refrigerant communication passages.

Description

  The present invention relates to an evaporator suitably 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. 2, 3, 10 and 11 are referred to as top and bottom.

  As an evaporator of this type, two rows of tube rows that are arranged in the direction of ventilation and are composed of a plurality of heat exchange tubes that extend in the vertical direction and are arranged at intervals in a direction perpendicular to the direction of ventilation; The leeward side upper and lower header sections provided on the upper and lower sides of the leeward side tube row and the leeward side upper and lower header parts provided on the upper and lower sides of the windward side tube row are provided. Three or more tube groups consisting of heat exchange tubes are provided, and a tube group consisting of a plurality of heat exchange tubes and one tube group less than the number of tube groups in the leeward tube row is provided in the leeward side tube row. The upper and lower header sections are provided with the same number of sections as the number of tube groups in the leeward tube row, and the heat exchange tubes of each tube group in the leeward tube row communicate with each section. The windward upper and lower header sections are provided with the same number of sections as the number of tube groups in the windward tube row, and the heat exchange tubes of each tube group in the windward tube row are passed through each section, The header portion on the same side as the leeward header portion provided with the refrigerant inlet in one of the header portions of the upper and lower header portions and having the refrigerant inlet of the upper and lower header portions The refrigerant outlet is provided in a section at the same end as the refrigerant inlet, and the refrigerant flow direction in the heat exchange tube of the farthest tube group located farthest from the refrigerant inlet in the leeward tube row and the refrigerant in the windward tube row The flow direction of the refrigerant in the heat exchange tube of the farthest tube group located farthest from the outlet is the same direction, and is arranged side by side in the ventilation direction and heat exchange Flow direction of the refrigerant in the cube is an evaporator in which the two single pass by the farthest tube group are configured have been proposed in the same direction (see Patent Document 1).

  According to the evaporator described in Patent Document 1, it is possible to suppress an increase in passage resistance in the final pass having the superheat region.

  By the way, in the evaporator of the type of patent document 1, in order to improve cooling performance, it is located farthest from the refrigerant inlet and the refrigerant outlet, and is provided side by side in the ventilation direction to constitute one path. At the same time, it is required to equalize the amount of refrigerant flowing in the heat exchange tubes of the two tube groups in which the flow directions of the refrigerant in the heat exchange tubes are the same.

  Therefore, in one evaporator described in Patent Document 1, the leeward farthest section and the windward furthest section are communicated by communication means provided so as to protrude in the lateral direction of the heat exchange core portion. Yes. However, in this case, since the communication means protrudes in the lateral direction of the heat exchange core part, there is a problem that a dead space is generated when the evaporator is disposed.

  Further, in another evaporator described in Patent Document 1, a partition wall is provided between the leeward farthest section and the windward farthest section, and communication between the farthest sections is allowed to pass through the partition wall. A hole is formed, and the communication hole is formed on the outer side in the vertical direction with respect to the end portions on both farthest section sides of the heat exchange tube. However, when both farthest sections are located on the upper side of the heat exchange tube, since the communication hole is located above the upper end of the heat exchange tube, the refrigerant flowing into the leeward farthest section is affected by gravity. A large amount flows into the heat exchange tubes of the farthest tube group in the leeward side tube row. Accordingly, the amount of refrigerant flowing in the heat exchange tubes of the two farthest tube groups, which are provided side by side in the ventilation direction and constitute one path and the flow direction of the refrigerant in the heat exchange tubes is the same direction, is uniform. Effect is not sufficient. On the other hand, when both farthest sections are located on the lower side of the heat exchange tube, the communication hole is located below the lower end of the heat exchange tube, so when the refrigerant flow rate changes, it flows into the leeward farthest section. A large amount of the refrigerant flows into the heat exchange tubes of the farthest tube group in the leeward tube row. Accordingly, the amount of refrigerant flowing in the heat exchange tubes of the two farthest tube groups, which are provided side by side in the ventilation direction and constitute one path and the flow direction of the refrigerant in the heat exchange tubes is the same direction, is uniform. Effect is not sufficient.

JP 2009-156532 A

  The object of the present invention is to solve the above-mentioned problem, and is located farthest from the refrigerant inlet and the refrigerant outlet and arranged side by side in the ventilation direction to constitute one path and the flow of the refrigerant in the heat exchange tube An object of the present invention is to provide an evaporator that can improve the cooling performance by uniformizing the amount of refrigerant flowing in the heat exchange tubes of two tube groups having the same direction.

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

1) Two rows of tubes arranged in the direction of ventilation and arranged side by side in the direction perpendicular to the direction of ventilation, and two rows of tubes arranged side by side in the direction of ventilation The leeward side upper and lower header portions provided on the upper and lower sides of the windward side, and the windward side upper and lower header portions provided on the upper and lower sides of the windward side tube row are provided. A plurality of tube groups are provided, and the same number of sections as the number of tube groups in the leeward side tube row are provided in the leeward side upper and lower header portions, and each tube group in the leeward side tube row is provided with heat exchange tubes And the same number of sections as the number of tube groups of the windward side tube row are provided in the windward upper and lower header portions, and heat exchange of each tube group of the windward side tube row is provided in each zone. The leeward header is provided with a refrigerant inlet at one end of either one of the leeward upper and lower headers, and the refrigerant inlet of the leeward upper and lower headers. The refrigerant outlet is provided in a section at the same end as the refrigerant inlet in the header part on the same side as the part, and the flow direction of the refrigerant in the heat exchange tube of the farthest tube group located farthest from the refrigerant inlet in the leeward tube row The flow direction of the refrigerant in the heat exchange tube of the farthest tube group located farthest from the refrigerant outlet in the windward tube row is the same direction, and is provided side by side in the ventilation direction and in the heat exchange tube In the evaporator in which one path is constituted by the two farthest tube groups in which the flow direction of the refrigerant is the same direction,
A first space where the heat exchange tube faces the leeward farthest section in the leeward farthest section upstream of the refrigerant flow direction through which the heat exchange tubes of the farthest tube group of the leeward tube row are connected; A shunting resistance member is provided that divides the second space into which refrigerant flows from a section adjacent to the refrigerant inlet side of the leeward farthest section separated from one space, and a refrigerant passage hole is formed in the shunting resistance member; The second space of the leeward farthest section and the furthest furthest section on the upstream side in the refrigerant flow direction through which the heat exchange tubes of the farthest tube group of the windward tube row are communicated are connected by the refrigerant communication path. The evaporator.

  2) The evaporator according to 1) above, wherein a flow blocking member that blocks the flow of the refrigerant to the first space in the leeward farthest section is provided in the header section provided with the leeward farthest section.

  3) The evaporator according to the above 1) or 2), wherein A represents the total cross-sectional area of the refrigerant passage hole and B represents the total cross-sectional area of the refrigerant communication path, and satisfies the relationship B> A.

  4) The evaporator according to any one of the above items 1) to 3), which includes an accelerating member that promotes the inflow of refrigerant from the second space of the leeward farthest section into the furthest furthest section.

  5) The evaporator according to 4) above, wherein the accelerating member is provided in a header portion provided with a leeward farthest section.

  6) The accelerating member is provided on the leeward side of the inlet portion where the refrigerant flows into the second space of the leeward farthest section, and from a baffle plate that inhibits the flow of the refrigerant to the leeward side in the second space. The evaporator according to 5) above.

  7) An accelerating member is provided in the middle portion of the heat exchange tubes in the second space of the leeward farthest section and in the heat exchange tube side, and to the heat exchange tube side in the second space. 4. The evaporator according to 4) above, comprising a baffle plate that inhibits inflow of the refrigerant.

8) The first to third tube groups including a plurality of heat exchange tubes are provided in the leeward side tube row side by side from the end on the refrigerant inlet side toward the other end side, The fourth and fifth tube groups composed of a plurality of heat exchange tubes are provided side by side from the end on the opposite side to the refrigerant outlet side toward the end on the refrigerant outlet side,
The first and third sections through which the heat exchange tubes of the first to third tube groups are respectively connected to the leeward upper and lower header parts, and the heat of the fourth and fifth tube groups are respectively provided to the leeward upper and lower header parts. The fourth and fifth compartments through which the exchange tube communicates are provided, the refrigerant inlet is provided in the first compartment of either the upper or lower header part on the leeward side, and the refrigerant inlet of either the upper or lower side on the leeward side is provided. A refrigerant outlet is provided in the fifth section of the header portion located on the side,
The first tube group serves as a first path in which the refrigerant flows through the heat exchange tube from the side where the refrigerant inlet is located, to the opposite side, and the second tube group passes through the heat exchange tube. The second path flows in the opposite direction to the first path, the third and fourth tube groups become the third path in which the refrigerant flows in the same direction as the first path in the heat exchange tube, and the fifth tube group becomes the refrigerant. The fourth path flows in the direction opposite to the first path in the heat exchange tube, and the third and fourth tube groups in which the flow direction of the refrigerant in the heat exchange tube is the same direction are ventilated. It is configured by being arranged side by side,
The third tube group in the leeward tube row is the farthest tube group, and the third section of the header portion on the side where the refrigerant inlet is provided in either the upper or lower header portion on the leeward side is the heat exchange of the third tube group. The farthest section upstream of the refrigerant flow direction through which the tube is communicated, and the third section is provided with a shunting resistance member that divides the inside of the third section into a first space and a second space. The evaporator according to any one of 1) to 7), wherein the refrigerant flows into the second space of the third section from the second section of the header portion on the side where the refrigerant inlet is provided. .

9) The first to fourth tube groups composed of a plurality of heat exchange tubes are provided in the leeward side tube row side by side from the end on the refrigerant inlet side toward the other end side, A fifth to seventh tube group consisting of a plurality of heat exchange tubes is provided side by side from the end on the opposite side to the refrigerant outlet side toward the end on the refrigerant outlet side,
The first and fourth sections through which the heat exchange tubes of the first to fourth tube groups are respectively connected to the leeward side upper and lower header parts, and the heat of the fifth to seventh tube groups are respectively provided to the leeward upper and lower header parts. Fifth to seventh sections through which the exchange tube communicates are provided, a refrigerant inlet is provided in the first section of the header part on either the upper or lower side of the leeward side, and a refrigerant inlet is provided on either the upper or lower side of the leeward side. A refrigerant outlet is provided in the seventh section of the header portion located on the side,
The first tube group serves as a first path in which the refrigerant flows through the heat exchange tube from the side where the refrigerant inlet is located, to the opposite side, and the second tube group passes through the heat exchange tube. The second pass flows in the opposite direction to the first pass, the third tube group becomes the third pass in which the refrigerant flows in the same direction as the first pass through the heat exchange tube, and the fourth and fifth tube groups become the refrigerant. The fourth path flows in the direction opposite to the first path in the heat exchange tube, the sixth tube group becomes the fifth path in which the refrigerant flows in the same direction as the first path in the heat exchange tube, and the seventh tube group The fourth and fifth tubes have a sixth path in which the refrigerant flows in the direction opposite to the first path in the heat exchange tube, and the fourth path has the same flow direction of the refrigerant in the heat exchange tube. Groups are arranged side by side in the ventilation direction It is more structure,
The fourth tube group in the leeward tube row is the farthest tube group, and the fourth section of the header portion on the opposite side to the side where the refrigerant inlet is provided in either the upper or lower header portion on the leeward side is the fourth tube group. In addition to the farthest section upstream in the refrigerant flow direction through which the heat exchange tube is communicated, a resistance member for shunting is provided in the fourth section to divide the fourth section into a first space and a second space. Among the above 1) to 7), the refrigerant flows into the second space of the fourth section from the third section of the header portion opposite to the side where the refrigerant inlet is provided. The evaporator as described in any one of.

  10) The evaporator according to any one of the above items 1) to 9), wherein the refrigerant inlet is provided in the leeward upper header portion and the refrigerant outlet is provided in the leeward upper header portion.

  According to the evaporators 1) to 10) above, the farthest leeward section on the upstream side in the refrigerant flow direction through which the heat exchange tubes of the farthest tube group of the leeward tube row are communicated, Is provided with a shunt resistance member that divides the first space into which the heat exchange tube faces and the second space that is separated from the first space and into which the refrigerant flows from a section adjacent to the refrigerant inlet side of the leeward farthest section, A refrigerant passage hole is formed in the shunting resistance member, and the second space in the furthest leeward section and the heat exchange tube of the furthest tube group in the windward tube row are connected to the upstream of the windward upstream in the refrigerant flow direction. Since the far section is communicated with the refrigerant communication path, there is no possibility that a dead space is generated when the evaporator is disposed.

  In addition, the refrigerant flows into the second space of the leeward farthest section, and then flows into the windward furthest section through the refrigerant communication passage to enter the heat exchange tube of the furthest tube group in the windward tube row. At the same time, it flows into the heat exchange tube of the farthest tube group of the leeward side tube row after entering the first space through the refrigerant passage hole of the shunting resistance member. The refrigerant flowing into the second space of the leeward farthest section is given resistance to the flow into the first space by the shunt resistance member, so that the leeward furthest section and the windward furthest section Is located on the upper side of the heat exchange tube, the refrigerant flowing into the leeward farthest section is prevented from flowing in a large amount into the heat exchange tube of the farthest tube group of the leeward tube row due to the influence of gravity. Is done. Therefore, the amount of refrigerant flowing into the heat exchange tube of the farthest tube group in the leeward tube row and the amount of refrigerant flowing into the heat exchange tube of the farthest tube group in the leeward tube row are made uniform. On the contrary, when the leeward farthest section and the windward farthest section are located below the heat exchange tube, the refrigerant that has flowed into the leeward farthest section even when the flow rate of the refrigerant fluctuates. However, it is suppressed that a large amount flows into the heat exchange tubes of the farthest tube group in the leeward side tube row. Therefore, the amount of refrigerant flowing into the heat exchange tube of the farthest tube group in the leeward tube row and the amount of refrigerant flowing into the heat exchange tube of the farthest tube group in the leeward tube row are made uniform. As a result, it is located farthest from the refrigerant inlet and the refrigerant outlet and is arranged side by side in the ventilation direction to form one path, and the two flow directions of the refrigerant in the heat exchange tube are the same direction. It becomes possible to equalize the amount of refrigerant flowing in the heat exchange tubes of the far tube group.

  According to the evaporator of the above 3), they are located farthest from the refrigerant inlet and the refrigerant outlet and are arranged side by side in the ventilation direction to form one path and the flow direction of the refrigerant in the heat exchange tube is the same. It is possible to effectively equalize the amount of refrigerant flowing in the heat exchange tubes of the two tube groups in the direction.

  According to the evaporators 4) to 7), since the accelerating member that promotes the inflow of the refrigerant from the second space of the leeward farthest section into the windward furthest section is provided, the leeward farthest section Inflow of refrigerant from the second space into the furthest farthest section is promoted, and the amount of refrigerant flowing into the second space of the furthest furthest section and the furthest furthest section becomes uniform. Is done. Therefore, the amount of refrigerant flowing into the heat exchange tube of the farthest tube group of the leeward tube row connected to the leeward farthest section, and the farthest tube group of the windward tube row connected to the furthest farthest partition. The amount of refrigerant flowing into the heat exchange tube is effectively equalized. As a result, heat exchange between the two farthest tube groups which are located farthest from the refrigerant inlet and the refrigerant outlet and are arranged side by side in the ventilation direction and the flow direction of the refrigerant in the heat exchange tubes is the same direction. It becomes possible to effectively equalize the amount of refrigerant flowing in the tube, and the cooling performance of the evaporator is further improved.

  According to the evaporators 6) and 7), the facilitating member that promotes the flow of the refrigerant that has flowed into the leeward farthest section into the furthest furthest section can be provided relatively easily.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway perspective view showing an overall configuration of an evaporator according to Embodiment 1 of the present invention. It is the sectional view on the AA line of FIG. 1 which abbreviate | omitted one part. It is the BB sectional drawing of FIG. 1 which abbreviate | omitted one part. It is CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG. It is a figure which shows the flow of the refrigerant | coolant in the evaporator of FIG. It is a fragmentary perspective view which shows the 1st modification of the leeward side upper header part of the evaporator of Embodiment 1. FIG. It is a fragmentary perspective view which shows the 2nd modification of the leeward side upper header part of the evaporator of Embodiment 1. FIG. It is a fragmentary perspective view which shows the 3rd modification of the leeward side upper header part of the evaporator of Embodiment 1. FIG. It is a partially-omission vertical sectional view which looked at the front from the back in the part of the leeward upper and lower header parts which shows the evaporator of Embodiment 2 of this invention. It is a partially-omission vertical sectional view which looked at the front from the back in the part of the windward upper and lower both header parts which shows the evaporator of Embodiment 2 of this invention. It is the EE sectional view taken on the line of FIG. It is the FF sectional view taken on the line of FIG. It is a figure which shows the flow of the refrigerant | coolant in the evaporator of FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In the embodiment described below, the evaporator according to the present invention is applied to a refrigeration cycle constituting a car air conditioner.

  Throughout the drawings, the same parts and the same parts are denoted by the same reference numerals, and redundant description is omitted.

  In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.

  In the following description, the downstream side of the air flowing in the ventilation gap between adjacent heat exchange tubes (the direction indicated by the arrow X in FIGS. 1, 4, 5, 12, and 13) The side opposite to the left side is referred to as the rear, and the left and right sides of FIGS. 2 to 5 and FIGS.

Embodiment 1
This embodiment is shown in FIGS. FIG. 1 shows the overall configuration of the evaporator, and FIGS. 2 to 5 show the configuration of the main part thereof. FIG. 6 shows the flow of refrigerant in the evaporator of FIG.

  In FIG. 1, the evaporator (1) includes an aluminum first header tank (2) and an aluminum second header tank (3) which are spaced apart in the vertical direction, and both header tanks (2) (3). And a heat exchange core part (4) provided between the two.

  The first header tank (2) has a leeward header part (5) located on the leeward side (front side) and an upwind side located on the leeward side (rear side) and integrated with the leeward header part (5). And a header section (6). Here, the leeward header section (5) and the leeward header section (6) are provided by partitioning the first header tank (2) forward and backward by the partition section (2a). The second header tank (3) has a leeward header part (7) located on the leeward side (front side) and an upwind side located on the leeward side (rear side) and integrated with the leeward header part (7). And a header portion (8). Here, the leeward header section (7) and the leeward header section (8) are provided by dividing the second header tank (3) in the front and rear directions by the partition section (3a).

  In the following description, the leeward header portion (5) of the first header tank (2) is the leeward upper header portion, the leeward header portion (7) of the second header tank (3) is the leeward lower header portion, The upwind header section (6) of the 1 header tank (2) is referred to as the upwind header section, and the upwind header section (8) of the second header tank (3) is referred to as the upwind header section.

  The heat exchange core section (4) has a plurality of flat aluminum heat exchange tubes that are oriented in the width direction in the ventilation direction and spaced in the left-right direction (direction perpendicular to the ventilation direction) and extend in the vertical direction. Two tube rows (11) and (12) made up of (9) are provided side by side in the front-rear direction, and the ventilation gap between adjacent heat exchange tubes (9) of each tube row (11) and (12) and Aluminum corrugated fins (13) are arranged outside the heat exchange tubes (9) on both the left and right ends so as to straddle the heat exchange tubes (9) of the front and rear tube rows (11) and (12), respectively. 9), aluminum side plates (14) are respectively arranged on the outer sides of the corrugated fins (13) at both left and right ends, and brazed to the corrugated fins (13). The heat exchange tube (9) is made of an aluminum extruded profile and has a plurality of refrigerant passages arranged in the width direction. The upper and lower ends of the heat exchange tubes (9) of the leeward side tube row (11) are connected to the leeward side upper and lower header portions (5) and (7) in a continuous manner, and the heat exchange tubes of the leeward side tube row (12). The upper and lower end portions of (9) are connected to the windward upper and lower header portions (6) and (8) in a continuous manner. Note that the number of heat exchange tubes (9) in the leeward tube row (11) is equal to the number of heat exchange tubes (9) in the windward tube row (12).

  As shown in FIGS. 2 to 5, in the leeward side tube row (11), three tube groups (11A) (11B) (11C) composed of a plurality of heat exchange tubes (9) are arranged from the right end to the left end. The upwind tube row (12) is arranged side by side, and the number of the fourth and fifth two tube groups (1) is larger than the number of tube groups of the downwind tube row (11). A small number of tube groups (12A) (12B) are provided side by side from the left end to the right end.

  The same number of tube groups (11A), (11B), and (11C) in the leeward side tube row (11) and the tube groups (11A) (11B) (11C) Sections (15), (16), (17) and (18), (19), and (21) through which the heat exchange tube (9) communicates are provided. A refrigerant inlet (22) is provided at the right end of the rightmost section (15) in the leeward side upper header (5). Three tube groups (11A), (11B), and (11C) in the leeward tube row (11) are moved from the refrigerant inlet (22) side end (right end) toward the other end (left end). It is called a tube group, and the sections (15) (16) (17) and (18) (19) (21) through which the heat exchange tubes (9) of the first to third tube groups (11A), (11B), and (11C) communicate Are referred to as first to third sections from the refrigerant inlet (22) side end (right end) toward the other end (left end). The third tube group (11C) is the farthest tube group located farthest from the refrigerant inlet (22) in the leeward tube row (11), and the third section (17) of the leeward upper header portion (5). Is the leeward farthest section on the upstream side (upper side) in the refrigerant flow direction through which the heat exchange tube (9) of the third tube group (11C) is passed.

  The same number of tube groups (12A) (12B) in the windward tube row (12) and heat exchange tubes (12A) (12B) in the upwind upper and lower header sections (6) (8) (9) ) (23) (24) and (25) (26) are provided. A refrigerant outlet (27) is provided at the right end (the same end as the refrigerant inlet (22)) of the rightmost section (24) in the upwind header section (6). Move the two tube groups (12A) and (12B) of the windward tube row (12) from the end (left end) opposite to the refrigerant outlet (27) to the end (right end) on the refrigerant outlet side (27) The fourth to fifth tube groups are called, and the compartments (23) (24) and (25) (26) through which the heat exchange tubes (9) of the fourth to fifth tube groups (12A) and (12B) communicate are refrigerant. The fourth to fifth sections are defined from the end (left end) opposite to the outlet (27) toward the end (right end) on the refrigerant outlet side (27). The fourth tube group (12A) is the farthest tube group located farthest from the refrigerant outlet (27) in the windward tube row (12), and the fourth section (23) of the windward upper header portion (6). Is the furthest windward farthest section on the upstream side (upper side) in the refrigerant flow direction through which the fourth tube group (12A) is communicated.

  The total number of heat exchange tubes (9) constituting the first and second tube groups (11A) and (11B) of the leeward tube row (11) is the fifth tube group (12) of the leeward tube row (12). 12B) is equal to the number of heat exchange tubes (9), and the number of heat exchange tubes (9) constituting the third tube group (11C) of the leeward side tube row (11) is the windward side tube. It is equal to the number of heat exchange tubes (9) constituting the fourth tube group (12A) of the row (12). The total length in the left and right direction of the first section (15) (18) and the second section (16) (19) in the leeward upper and lower header sections (5) and (7) is the leeward upper and lower header sections ( 6) The length in the left-right direction of the fifth section (24) (26) in (8) is the same as the length in the left-right direction, and the length in the left-right direction of the third section (17) (21) in the upper and lower header sections (5) (7) on the leeward side. This is equal to the length in the left-right direction of the fourth section (23) (25) in the upwind upper and lower header sections (6) (8).

  A partition wall (33) is provided between the first section (15) and the second section (16) of the leeward side upper header section (5), so that the sections (15) and (16) are not in communication with each other. It has become. In the third section (17), which is the farthest leeward section of the leeward upper header section (5), the lower first space (38) where the heat exchange tube (9) faces the third section (17). And a plate-shaped shunt resistor member (36) that is divided into an upper second space (37) separated from the first space (38). Between the second section (16) and the third section (17) of the leeward upper header section (5), the right end opening of the first space (38) of the third section (17) is closed, and the first section A flow blocking member (41) for blocking the flow of the refrigerant from the two compartments (16) to the first space (38) is provided. Further, the right end portion of the second space (37) of the third section (17) opens to the whole, so that the second section (16) and the second space (37) of the third section (17) are in communication with each other. The refrigerant flows into the second space (37) of the third section (17) from the second section (16) adjacent to the refrigerant inlet (22) side of the third section (17). Here, the opening at the right end of the second space (37) of the third section (17) serves as an inlet portion (45) through which the refrigerant flows into the second space (37) of the third section (17). Yes. Furthermore, a plurality of refrigerant passage holes (39) are formed in the shunting resistance member (36) at intervals in the left-right direction, thereby allowing both spaces (37) and (38) to communicate.

  The first section (18) and the second section (19) of the leeward side lower header section (7) are in communication with each other. Further, a partition wall (34) is provided between the second section (19) and the third section (21) of the leeward side lower header section (7), so that both sections (19) and (21) are not Communication is established.

  A partition wall (35) is provided between the fourth section (23) and the fifth section (24) of the upwind header section (6), so that the sections (23) and (24) are not in communication with each other. It has become.

  A plate-like shunt resistance member (42) for dividing the fifth section (26) into an upper space (26A) and a lower space (26B) in the fifth section (26) of the windward lower header section (8). A plurality of refrigerant passage holes (43) are formed in the shunting resistance member (42) at intervals in the left-right direction. Further, the left end opening of the upper space (26A) of the fifth section (26) is closed between the fourth section (25) and the fifth section (26) of the windward lower header section (8), and A plate-like flow promoting member (44) that promotes the flow of the refrigerant from the fourth section (25) to the lower space (26B) of the fifth section (26) is provided. Further, the left end portion of the lower space (26B) of the fifth section (26) opens to the whole, so that the fourth section (25) and the lower space (26B) of the fifth section (26) are in communication with each other. The refrigerant flows from the fourth section (25) into the lower space (26B) of the fifth section (26). In addition, if it does not hinder the promotion of the flow of the refrigerant from the fourth section (25) to the lower space (26B) of the fifth section (26), a refrigerant passage hole is formed in the flow promotion member (44). May be.

  The second space (37) of the third section (17) of the leeward upper header section (5) and the fourth section (23) of the leeward upper header section (6) are formed by the first header tank (2). A plurality of communication passages (30) including through holes provided at left and right intervals in a portion on the left side of the entrance portion (45), the blocking member (41) and the partition wall (35) in the partition portion (2a) Is communicated by.

  The third section (21) of the leeward lower header section (7) and the fourth section (25) of the leeward lower header section (8) are partitions in the partition section (3a) of the second header tank (3). It is made to communicate by the communication part (40) provided in the left part rather than the wall (34).

  Here, the total cross-sectional area of the plurality of refrigerant passage holes (39) provided in the shunting resistance member (36) is A, the third section (17) of the leeward upper header portion (5) and the leeward upper header portion. When the total cross-sectional area of the plurality of refrigerant communication passages (30) through the fourth section (23) of (6) is B, it is preferable that the relationship B> A is satisfied.

As described above, the shunt resistance member having the sections (15) to (19) (21) (23) to (26), the refrigerant inlet (22), the refrigerant outlet (27), and the refrigerant passage hole (39) ( 36), a blocking member (41), a first space (38), a second space (37), a shunting resistance member (42) having a refrigerant passage hole (43), a flow promoting member (44), an upper space (26A) ), The lower space (26B), the communication passage (30), and the communication portion (40), the refrigerant is the third tube located farthest from the first tube group (11A) and the refrigerant inlet (22). Group (11C) (the farthest tube group in the leeward tube row (11)) and the fourth tube group (12A) farthest from the refrigerant outlet (27) (the farthest tube group in the windward tube row (12)) ) In the heat exchange tube (9) from the side where the refrigerant inlet (22) is located, one of the upper and lower sides, here from the top to the bottom. These tube groups (11A) (11C ) (12A) is the downflow tube group. In addition, the refrigerant flows from the bottom to the top in the heat exchange tubes (9) of the second tube group (11B) and the fifth tube group (12B), and these tube groups (11B) (12B) It is an upflow tube group. That is, the flow direction of the refrigerant in the third tube group (11C) of the leeward tube row (11) and the heat exchange tube (9) of the fourth tube group (12A) of the leeward tube row (12) is the same direction. It has become. The first tube group (11A) has a first path (in which the refrigerant flows in the heat exchange tube (9) from the side where the refrigerant inlet (22) is positioned to the opposite side, here from the top to the bottom (in this case). 28), and the second tube group (11B) becomes the second path (29) in which the refrigerant flows from the bottom to the top (the direction opposite to the first path (28)) in the heat exchange tube (9). And the fourth tube group (11C) (12A) becomes the third path (31) in which the refrigerant flows from the top to the bottom (the same direction as the first path (28)) in the heat exchange tube (9). The group (12B) has a fourth path (32) in which the refrigerant flows in the heat exchange tube (9) from the bottom to the top (in the direction opposite to the first path (28)), and the third path (31). However, the third and fourth tube groups (11C) and (12A) having the same flow direction of the refrigerant in the heat exchange tube (9) are arranged side by side in the ventilation direction. Then, the refrigerant flowing in from the refrigerant inlet (22) passes through the following two paths and sequentially passes through the heat exchange tubes (9) of the first to fourth paths (28) (29) (31) (32). And flows out from the refrigerant outlet (27). The first path consists of the first section (15), the first tube group (11A) (first path (28)), the first section (18), the second section (19), and the second tube group (11B). (Second path (29)), second section (16), second space (37) of third section (17), fourth section (23), fourth tube group (12A) (third path (31 )), The fourth section (25), the lower space (26B), the upper space (26A), the fifth tube group (12B) (fourth path (32)) and the fifth section (24). The second path is the first section (15), the first tube group (11A) (first path (28)), the first section (18), the second section (19), and the second tube. Group (11B) (second path (29)), second section (16), second space (37) of third section (17), first space (38), third tube group (11C) ( 3rd path (31)), 3rd section (21), 4th section (25), lower space (26B) of 5th section (26), same upper space (26A), 5th tube group (12B) (first 4 passes (32)) and a fifth section (24).

  The evaporator (1) described above constitutes a refrigeration cycle together with a compressor, a condenser as a refrigerant cooler, and an expansion valve as a decompressor, and is mounted on a vehicle, for example, an automobile, as a car air conditioner. During the operation of the car air conditioner, the gas-liquid mixed phase two-phase refrigerant that has passed through the compressor, condenser and expansion valve passes through the refrigerant inlet (22) and enters the first section (15) of the leeward upper header section (5). It enters, flows through the heat exchange tubes (9) of the first to fourth paths (28), (29), (31), and (32) sequentially through the above-described two paths, and flows out from the refrigerant outlet (27).

  While the refrigerant flows in the heat exchange tube (9) of the leeward tube row (11) and in the heat exchange tube (9) of the windward tube row (12), the ventilation of the heat exchange core section (4) Heat exchange is performed with air passing through the gap (see arrow X in FIG. 1), the air is cooled, and the refrigerant flows out as a gas phase.

  Here, in the third section (17) of the leeward upper header section (5), the third section (17) is divided into a first space (38) and a second space (37). A diversion resistance member (36) is provided, and a plurality of refrigerant passage holes (39) are formed in the diversion resistance member (36) at intervals in the left-right direction, so that the diversion resistance member (36) flows into the second space (37). Thus, the resistance to the flow into the first space (38) is given to the refrigerant by the shunting resistance member (36), and even if it is affected by gravity, the third compartment (17) 2) A large amount of refrigerant flowing into the space (37) flows into the heat exchange tube (9) of the third tube group (11C) constituting the third path (31) in the leeward tube row (11). Is suppressed. Accordingly, the amount of refrigerant flowing into the heat exchange tube (9) of the third tube group (11C) through the first space (38) and the upwind header section (6) through the refrigerant communication passage (30). The amount of refrigerant flowing into the heat exchange tube (9) of the fourth tube group (12A) constituting the third path (31) of the upwind tube row (12) after entering the fourth section (23) of It is made uniform. In particular, the total cross-sectional area of the plurality of refrigerant passage holes (39) provided in the shunting resistance member (36) is A, and the second space (37) of the third section (17) of the leeward side upper header portion (5). And the fourth section (23) of the upwind header section (6) and the total cross-sectional area of the plurality of refrigerant communication passages (30) as B, if the relationship of B> A is satisfied, The amount of refrigerant flowing through the tube group (11C) and the fourth tube group (12A) is effectively equalized.

  7 to 9 show modifications of the leeward upper header section (5).

  In the case of the leeward side upper header portion (5) shown in FIG. 7, the second space (on the leeward side of the entrance portion (45) of the second space (37) in the third zone (17) which is the farthest leeward side zone) 37) A baffle plate (46) that obstructs the inflow of the refrigerant to the leeward side portion is provided over the entire height of the second space (37). The baffle plate (46) serves as an accelerating member (47) that promotes the inflow of refrigerant from the second space (37) of the third section (17) into the fourth section (23) that is the furthest farthest section. ing.

  In the case of the leeward side upper header section (5) shown in FIG. 8, the left and right direction in the second space (37) of the third section (17), which is the leeward side farthest section (alignment direction of the heat exchange tubes (9)) A baffle plate (48) that obstructs the inflow of the refrigerant to the heat exchange tube (9) side portion in the second space (37) is provided on the lower part of the intermediate portion (the heat exchange tube (9) side portion). The second space (37) is provided over the entire width in the front-rear direction. The baffle plate (48) serves as an accelerating member (49) that promotes the inflow of refrigerant from the second space (37) of the third section (17) into the fourth section (23), which is the furthest farthest section. ing.

  In the case of the leeward upper header section (5) shown in FIG. 9, the right end opening of the first space (38) of the third section (17) which is the farthest section on the leeward side is closed, and the leeward upper header section (5 ) On the leeward side upper header portion (see FIG. 8) except that the flow blocking member (41) for blocking the refrigerant flow from the second section (16) to the first space (38) is not provided. Same as 5).

  In addition, in the leeward side upper header portion (5) shown in FIG. 9, in the middle portion in the left-right direction (alignment direction of the heat exchange tubes (9)) in the first space (38) of the third section (17), A partition member that partitions the inside of one space (37) in the left-right direction may be provided. The partition member may be provided at the same position as the baffle plate (48) or may be provided at a position away from the baffle plate (48).

Embodiment 2
This embodiment is shown in FIGS. 10-13 shows the structure of the principal part of an evaporator, FIG. 14 shows the flow of the refrigerant | coolant in the evaporator of FIG.

  As shown in FIGS. 10 to 14, the leeward tube row (11) of the evaporator (50) includes four tube groups (11A), (11B), (11C), (11D) including a plurality of heat exchange tubes (9). ) Are arranged side by side from the right end to the left end, and the windward tube row (12) includes three heat exchange tubes (9) (the number of tube groups in the leeward tube row (11)). The tube group (12A) (12B) (12C) is also provided in a line from the left end to the right end.

  The same number of tube groups (11A), (11B), (11C), and (11D) in the leeward side tube row (11) and the tube groups (11A) (11B) Sections (51) (52) (53) (54) and (55) (56) (57) (58) through which the heat exchange tube (9) of (11C) (11D) communicates are provided. A refrigerant inlet (22) is provided at the right end of the rightmost section (51) in the leeward side upper header (5). The four tube groups (11A), (11B), (11C), and (11D) in the leeward tube row (11) are referred to as first to fourth tube groups from the refrigerant inlet (22) side end toward the other end, Sections (51) (52) (53) (54) and (55) (56) (57) through which the heat exchange tubes (9) of the first to fourth tube groups (11A) (11B) (11C) (11D) communicate ) (58) is referred to as first to fourth sections from the refrigerant inlet (22) side end toward the other end. The fourth tube group (11D) is the farthest tube group located farthest from the refrigerant inlet (22) in the leeward tube row (11), and the fourth section (58) of the leeward upper header portion (5). Is the leeward farthest section on the upstream side (upper side) in the refrigerant flow direction through which the heat exchange tube (9) of the fourth tube group (11D) is communicated.

  On the upwind upper and lower header sections (6) and (8), each tube group (12A) (12B) (12C) is the same number as the tube groups (12A) (12B) (12C) in the windward tube row (12). Sections (59) (61) (62) and (63) (64) (65) through which the heat exchange tube (9) communicates are provided. A refrigerant outlet (27) is provided at the right end (the same end as the refrigerant inlet (22)) of the rightmost section (64) in the upwind header section (6). The three tube groups (12A), (12B), and (12C) in the windward tube row (12) are moved from the end opposite to the refrigerant outlet (27) toward the end on the refrigerant outlet side (27). It is called the seventh tube group, and the sections (59) (61) (62) and (63) (64) (5) to the seventh tube group (12A) (12B) (12C) through which the heat exchange tube (9) communicates. 65) is referred to as fifth to seventh sections from the end opposite to the refrigerant outlet (27) toward the end of the refrigerant outlet (27). The fifth tube group (12A) is the farthest tube group located farthest from the refrigerant outlet (27) in the windward tube row (12), and the fifth section (63) of the windward upper header portion (6). Is the farthest upwind section on the upstream side (upper side) in the refrigerant flow direction through which the fifth tube group (12A) is communicated.

  The total number of heat exchange tubes (9) constituting the first and second tube groups (11A) and (11B) of the leeward side tube row (11) is the seventh tube group (12) of the leeward side tube row (12). 12C) is equal to the number of heat exchange tubes (9), and the heat exchange tubes (9C) constituting the third tube group (11C) and the fourth tube group (11D) of the leeward tube row (11) ) Is equal to the number of heat exchange tubes (9) constituting the sixth tube group (12B) and the fifth tube group (12A) of the windward tube row (12). The total length in the left and right direction of the first section (51) (55) and the second section (52) (56) in the leeward upper and lower header sections (5) and (7) is the leeward upper and lower header sections ( 6) It is equal to the length in the left and right direction of the seventh section (62) and (65) in (8), and the third section (53) (57) and the fourth section (in the leeward upper and lower header sections (5) and (7)) The left and right lengths of 54) and 58 are the left and right lengths of the sixth section (61) (64) and the fifth section (59) (63) in the upwind upper and lower header sections (6) and (8), respectively. It is equal to the length.

  Partition walls (73) are provided between the first section (51) and the second section (52) and between the third section (53) and the fourth section (54) of the leeward side upper header section (5). Thus, the first section (51) and the second section (52), and the third section (53) and the fourth section (54) are in a non-communication state. Further, the second section (52) and the third section (53) of the leeward side upper header section (5) are in communication with each other.

  The first section (55) and the second section (56) of the leeward side lower header section (7) are in communication with each other. A partition wall (74) is provided between the second section (56) and the third section (57) of the leeward side lower header section (7), so that the sections (56) and (57) are not in communication with each other. It has become. Further, in the fourth section (58) which is the farthest section on the leeward side of the leeward lower header section (7), the first space (82) on the upper side where the heat exchange tube (9) faces the fourth section (58). ) And a lower second space (81) separated from the first space (82), a shunt resistance member (79) is provided. Between the third section (57) and the fourth section (58) of the leeward side lower header section (7), the right end opening of the first space (82) of the fourth section (58) is closed, and the first section A flow blocking member (84) for blocking the flow of the refrigerant from the three sections (57) to the first space (82) is provided. Further, the right end portion of the second space (81) of the fourth section (58) opens to the whole, so that the third section (57) and the second space (81) of the fourth section (58) communicate with each other. Thus, the refrigerant flows into the second space (81) of the fourth section (58) from the third section (57) adjacent to the refrigerant inlet (22) side of the fourth section (58). Here, the opening at the right end of the second space (81) of the fourth section (58) serves as an inlet portion (80) for allowing the refrigerant to flow into the second space (81) of the fourth section (58). Yes. Further, a plurality of refrigerant passage holes (83) are formed in the shunting resistance member (79) at intervals in the left-right direction, so that both spaces (81) (82) are communicated.

  The fifth section (59) and the sixth section (61) of the windward upper header section (6) are in communication with each other. A partition wall (75) is provided between the sixth section (61) and the seventh section (62) of the windward upper header section (6), so that the sections (61) and (62) are not in communication with each other. It has become.

  A partition wall (76) is provided between the fifth section (63) and the sixth section (64) of the windward lower header section (8), so that the sections (63) and (64) are not in communication. It has become. A plate-like shunt resistance member (42) that divides the seventh compartment (65) into an upper space (65A) and a lower space (65B) in the seventh compartment (65) of the upwind lower header section (8) A plurality of refrigerant passage holes (43) are formed in the shunting resistance member (42) at intervals in the left-right direction. Further, the left end opening of the upper space (65A) of the seventh section (65) is closed between the sixth section (64) and the seventh section (65) of the windward lower header section (8), and A plate-like flow promoting member (44) for promoting the flow of the refrigerant from the sixth section (64) to the lower space (65B) of the seventh section (65) is provided. Further, the left end portion of the lower space (65B) of the seventh section (26) opens to the whole, so that the sixth section (64) and the lower space (65B) of the seventh section (65) are in communication with each other. The refrigerant flows from the sixth section (64) into the lower space (65B) of the seventh section (65). Note that a coolant passage hole may be formed in the flow promoting member (44).

  The fourth section (54) of the leeward upper header section (5) and the fifth section (59) of the leeward upper header section (6) are partitions in the partition section (2a) of the first header tank (2). It is made to communicate by the communication part (78) provided in the left part rather than the wall (73).

  The second space (81) of the fourth section (58) of the leeward side lower header section (7) and the fifth section (63) of the leeward side lower header section (8) are arranged in the second header tank (3). A plurality of communication passages (77) comprising through-holes spaced in the left-right direction in the left part of the entrance part (80), the blocking member (84) and the partition wall (76) in the partition part (3a) Is communicated by.

  Here, the total cross-sectional area of the plurality of refrigerant passage holes (83) provided in the shunting resistance member (79) is A, the fourth section (58) of the leeward lower header portion (7) and the leeward lower header portion. When the total cross-sectional area of the plurality of refrigerant communication passages (77) through the fifth section (63) in (8) is B, it is preferable that the relationship B> A is satisfied.

As described above, each of the compartments (51) to (59) (61) to (65), the refrigerant inlet (22), the refrigerant outlet (27), the shunt resistance member (79) having the refrigerant passage hole (83), The blocking member (84), the first space (82), the second space (81), the shunting resistance member (42) having the refrigerant passage hole (43), the flow promoting member (44), the upper space (65A), the lower By providing the space (65B), the communication passage (77), and the communication portion (78), the refrigerant is heated by the first tube group (11A), the third tube group (11C), and the sixth tube group (12B). In the exchange tube (9), it will flow from the side where the refrigerant inlet (22) of either the upper or lower side is located to the opposite side, here from the top to the bottom, and these tube groups (11A) (11C) (12B ) Is the downflow tube group. In addition, the refrigerant is the second tube group (11B), the fourth tube group (11D) located farthest from the refrigerant inlet (22), and the fifth tube group (12A) farthest from the refrigerant outlet (27). And the seventh tube group (12C) in the heat exchange tube (9) will flow from bottom to top, and these tube groups (11B) (11D) (12A) (12C) will be the upflow tube group ing. That is, the flow direction of the refrigerant in the fourth tube group (11D) of the leeward tube row (11) and the heat exchange tube (9) of the fifth tube group (12A) of the leeward tube row (12) is the same direction. It has become. The first tube group (11A) has a first path (in which the refrigerant flows in the heat exchange tube (9) from the side where the refrigerant inlet (22) is positioned to the opposite side, here from the top to the bottom (in this case). 66), and the second tube group (11B) becomes the second path (67) in which the refrigerant flows from the bottom to the top (opposite to the first path (66)) in the heat exchange tube (9). The tube group (11C) becomes the third path (68) in which the refrigerant flows from the top to the bottom (the same direction as the first path (66)) in the heat exchange tube (9), and the fourth and fifth tube groups (11D ) (12A) becomes the fourth path (69) in which the refrigerant flows from the bottom to the top (the direction opposite to the first path (66)) in the heat exchange tube (9), and the sixth tube group (12B) The refrigerant passes through the heat exchange tube (9) from the top to the bottom (in the same direction as the first pass (66)), the fifth path (71), and the seventh tube group (12C) is connected to the heat exchange tube (9 ) Flows from bottom to top (in the opposite direction to the first pass (66)) 6th pass (
72), and in the fourth path (69), the fourth and fifth tube groups (11D) (12A) in which the flow direction of the refrigerant in the heat exchange tube (9) is the same are arranged in the ventilation direction. It is comprised by providing. Then, the refrigerant flowing from the refrigerant inlet (22) passes through the following two paths, and the heat exchange tubes of the first to sixth paths (66) (67) (68) (69) (71) (72) It flows in order (9) and flows out from the refrigerant outlet (27). The first path consists of the first section (51), the first tube group (11A) (first path (66)), the first section (55), the second section (56), and the second tube group (11B). (Second path (67)), second section (52), third section (53), third tube group (11C) (third path (68)), third section (57), fourth section ( 58) second space (81), fifth section (63), fifth tube group (12A) (fourth path (69)), fifth section (59), sixth section (61), sixth tube Group (12B) (5th path (71)), 6th section (64), 7th section (65) lower space (65B), same space (65A), 7th tube group (12C) (6th path) (32)) and the seventh section (62), the second path is the first section (51), the first tube group (11A) (first path (66)), the first section (55), Second section (56), second tube group (11B) (second pass (67)), second section (52), third section (53), third tube group (11C) (third path (68 )), The third section (57), the second space (81) of the fourth section (58), the first space (82), the fourth section Tube group (11D) (fourth path (69)), fourth section (54), fifth section (59), sixth section (61), sixth tube group (12B) (fifth path (71)) In the sixth section (64), the lower space (65B), the upper space (65A), the seventh tube group (12C) (sixth path (32)) and the seventh section (62) in the seventh section (65) is there.

  The evaporator (1) described above constitutes a refrigeration cycle together with a compressor, a condenser as a refrigerant cooler, and an expansion valve as a decompressor, and is mounted on a vehicle, for example, an automobile, as a car air conditioner. When the car air conditioner is in operation, the gas-liquid mixed phase two-phase refrigerant that has passed through the compressor, condenser and expansion valve passes through the refrigerant inlet (22) and enters the first section (51) of the leeward upper header section (5). Enters the heat exchange tubes (9) of the first to sixth paths (66), (67), (68), (69), (71), and (72) in order through the above-described two paths, and the refrigerant outlet ( It flows out from 27).

  While the refrigerant flows in the heat exchange tube (9) of the leeward tube row (11) and in the heat exchange tube (9) of the windward tube row (12), the ventilation of the heat exchange core section (4) Heat exchange is performed with air passing through the gap (see arrow X in FIG. 1), the air is cooled, and the refrigerant flows out as a gas phase.

  Here, in the fourth section (58) of the leeward side lower header section (7), a plate-shaped section that divides the fourth section (58) into a first space (82) and a second space (81). The diversion resistance member (79) is provided, and the diversion resistance member (79) is formed with a plurality of refrigerant passage holes (83) at intervals in the left-right direction, so that it flows into the second space (81). Thus, resistance to the flow into the first space (82) is given to the refrigerant by the shunting resistance member (79), and even if the flow rate of the refrigerant fluctuates, the fourth compartment (58) A large amount of refrigerant flowing into the space (81) flows into the heat exchange tube (9) of the fourth tube group (11D) constituting the fourth path (69) in the leeward tube row (11). Is suppressed. Therefore, the amount of refrigerant flowing into the heat exchange tube (9) of the fourth tube group (11D) through the first space (82) and the upwind lower header portion (8) through the refrigerant communication passage (77). The amount of refrigerant flowing into the heat exchange tube (9) of the fifth tube group (12A) constituting the fourth path (69) of the upwind tube row (12) after entering the fifth section (63) of It is made uniform. In particular, the total cross-sectional area of the plurality of refrigerant passage holes (83) provided in the shunting resistance member (79) is A, and the second space (81) of the fourth section (58) of the leeward lower header portion (7). When the total cross-sectional area of the plurality of refrigerant communication passages (77) passing through the upper section and the fifth section (63) of the windward lower header portion (8) is B, The amount of refrigerant flowing through the tube group (11D) and the fifth tube group (12A) is effectively equalized.

  In Embodiment 2, the leeward side lower header part (7) may be provided with a promoting member as shown in FIGS.

  In the drawings showing the above two embodiments, the dimensions of the evaporator, the number of heat exchange tubes, the pitch of the heat exchange tubes, and the like are different from the actual ones.

  In the above two embodiments, the header portion on the upstream side in the flow direction of the first pass and the header portion on the downstream side in the flow direction are provided so that the former is positioned above, but the present invention is limited to this. Instead of this, on the contrary, the header portion on the upstream side in the flow direction of the first path and the header portion on the downstream side in the flow direction may be provided so that the former is positioned below. That is, it may be provided upside down from the above embodiment.

  In the evaporator according to the present invention, a plurality of flat hollow bodies formed by brazing the peripheral portions with a pair of plate-shaped plates facing each other are arranged in parallel, and are lined up in the ventilation direction in each flat hollow body. Two heat exchange tubes that extend in the vertical direction, and header forming parts that lead to the upper and lower ends of both heat exchange tubes are provided, and flat hollow so that the two upper and lower header forming parts of all flat hollow bodies can communicate with each other When the bodies are brazed to each other, two rows of tube rows each including a plurality of heat exchange tubes extending in the vertical direction and spaced apart in a direction perpendicular to the ventilation direction are provided side by side in the ventilation direction. In addition, both the leeward and leeward upper and lower headers where the upper and lower ends of the leeward and upper winder tube rows communicate with each other by the flat hollow body header forming portion. Is also applicable to form a so-called laminated evaporator provided.

  The evaporator according to the present invention is suitably used for a refrigeration cycle constituting a car air conditioner.

(1) (50): Evaporator
(5): First header tank leeward header (leeward upper header)
(6): Windward header section of the first header tank (windward upper header section)
(7): The leeward header of the second header tank (leeward lower header)
(8): Windward header part of the second header tank (windward lower header part)
(9): Heat exchange tube
(11): Downward tube row
(11A) (11B) (11C): First to third tube groups
(11D): Fourth tube group
(12): Windward tube row
(12A) (12B): 4th and 5th tube groups (5th and 6th tube groups)
(12C): Seventh tube group
(15) (16) (17): First to third sections of the leeward upper header section
(18) (19) (21): First to third sections of the leeward lower header section
(22): Refrigerant inlet
(23) (24): 4th and 5th section of upwind header section
(25) (26): Fourth and fifth sections of the upwind header section
(27): Refrigerant outlet
(66) (29) (31) (32): 1st to 4th pass
(30): Refrigerant communication path
(36): Shunt resistance member
(37): Second space
(38): 1st space
(39): Refrigerant passage hole
(41): Flow blocking member
(45): Entrance
(46) (48): Baffle plate
(47) (49): Promoting member
(51) (52) (53) (54): First to fourth sections of the leeward upper header section
(55) (56) (57) (58): First to fourth sections of the leeward lower header section
(59) (61) (62): Fifth to seventh sections of the upwind header section
(63) (64) (65): Fifth to seventh sections of the upwind lower header
(66) (67) (68) (69) (71) (72): 1st to 6th pass
(79): Resistance member for shunting
(80): Entrance
(81): Second space
(82): 1st space
(83): Refrigerant passage hole
(84): Flow blocking member

Claims (10)

Two rows of tubes arranged in the direction of ventilation and arranged in the direction perpendicular to the direction of ventilation and spaced apart in the direction perpendicular to the direction of ventilation, The leeward upper and lower header sections provided on both sides and the leeward upper and lower header sections provided on the upper and lower sides of the windward tube row are provided, and each of the tube rows includes a plurality of heat exchange tubes. The same number of sections as the number of tube groups in the leeward tube row are provided in the upper and lower header sections of the leeward side, and the heat exchange tubes of each tube group in the leeward tube row communicate with each section. In the upwind upper and lower header sections, the same number of sections as the number of tube groups in the upwind tube row are provided, and the heat exchange channels of each tube group in the upwind tube row are provided in each section. Leeward side where the refrigerant inlet is provided in one of the sections of the header part of the leeward upper and lower header parts, and the refrigerant inlet of the windward upper and lower header parts is provided. The refrigerant outlet is provided in the same end section as the refrigerant inlet in the header part on the same side as the header part, and the refrigerant flow direction in the heat exchange tube of the farthest tube group located farthest from the refrigerant inlet in the leeward tube row And the flow direction of the refrigerant in the heat exchange tubes of the farthest tube group located farthest from the refrigerant outlet in the windward tube row are the same direction, and are arranged side by side in the ventilation direction and in the heat exchange tubes In an evaporator in which one path is constituted by the two farthest tube groups in which the refrigerant flows in the same direction,
A first space where the heat exchange tube faces the leeward farthest section in the leeward farthest section upstream of the refrigerant flow direction through which the heat exchange tubes of the farthest tube group of the leeward tube row are connected; A shunting resistance member is provided that divides the second space into which refrigerant flows from a section adjacent to the refrigerant inlet side of the leeward farthest section separated from one space, and a refrigerant passage hole is formed in the shunting resistance member; The second space of the leeward farthest section and the furthest furthest section on the upstream side in the refrigerant flow direction through which the heat exchange tubes of the farthest tube group of the windward tube row are communicated are connected by the refrigerant communication path. The evaporator. The evaporator according to claim 1, wherein a flow blocking member that blocks the flow of the refrigerant to the first space of the leeward farthest section is provided in the header portion provided with the leeward farthest section. The evaporator according to claim 1 or 2, satisfying a relationship of B> A, where A is a total cross-sectional area of the refrigerant passage holes and B is a total cross-sectional area of the refrigerant communication passage. The evaporator according to any one of claims 1 to 3, further comprising an accelerating member that promotes the inflow of refrigerant from the second space of the leeward farthest section into the furthest furthest section. The evaporator according to claim 4, wherein the accelerating member is provided in a header portion in which the leeward farthest section is provided. The facilitating member is provided on the leeward side of the inlet portion where the refrigerant flows into the second space of the leeward farthest section, and includes a baffle plate that inhibits the flow of the refrigerant to the leeward side in the second space. Item 6. The evaporator according to Item 5. The accelerating member is provided in the middle portion of the heat exchange tubes in the second space of the leeward farthest section and in the heat exchange tube side portion, and the refrigerant to the heat exchange tube side in the second space The evaporator of Claim 4 which consists of a baffle plate which blocks | prevents inflow. The first to third tube groups including a plurality of heat exchange tubes are provided in the leeward side tube row side by side from the end on the refrigerant inlet side toward the other end side. The fourth and fifth tube groups composed of heat exchange tubes are provided side by side from the end opposite to the refrigerant outlet side toward the end on the refrigerant outlet side,
The first and third sections through which the heat exchange tubes of the first to third tube groups are respectively connected to the leeward upper and lower header parts, and the heat of the fourth and fifth tube groups are respectively provided to the leeward upper and lower header parts. The fourth and fifth compartments through which the exchange tube communicates are provided, the refrigerant inlet is provided in the first compartment of either the upper or lower header part on the leeward side, and the refrigerant inlet of either the upper or lower side on the leeward side is provided. A refrigerant outlet is provided in the fifth section of the header portion located on the side,
The first tube group serves as a first path in which the refrigerant flows through the heat exchange tube from the side where the refrigerant inlet is located, to the opposite side, and the second tube group passes through the heat exchange tube. The second path flows in the opposite direction to the first path, the third and fourth tube groups become the third path in which the refrigerant flows in the same direction as the first path in the heat exchange tube, and the fifth tube group becomes the refrigerant. The fourth path flows in the direction opposite to the first path in the heat exchange tube, and the third and fourth tube groups in which the flow direction of the refrigerant in the heat exchange tube is the same direction are ventilated. It is configured by being arranged side by side,
The third tube group in the leeward tube row is the farthest tube group, and the third section of the header portion on the side where the refrigerant inlet is provided in either the upper or lower header portion on the leeward side is the heat exchange of the third tube group. The farthest section upstream of the refrigerant flow direction through which the tube is communicated, and the third section is provided with a shunting resistance member that divides the inside of the third section into a first space and a second space. The evaporator according to any one of claims 1 to 7, wherein the refrigerant flows into the second space of the third section from the second section of the header portion on the side where the refrigerant inlet is provided. The first to fourth tube groups composed of a plurality of heat exchange tubes are provided in the leeward side tube row side by side from the end on the refrigerant inlet side toward the other end side. Fifth to seventh tube groups composed of heat exchange tubes are provided side by side from the end opposite to the refrigerant outlet side toward the end on the refrigerant outlet side,
The first and fourth sections through which the heat exchange tubes of the first to fourth tube groups are respectively connected to the leeward side upper and lower header parts, and the heat of the fifth to seventh tube groups are respectively provided to the leeward upper and lower header parts. Fifth to seventh sections through which the exchange tube communicates are provided, a refrigerant inlet is provided in the first section of the header part on either the upper or lower side of the leeward side, and a refrigerant inlet is provided on either the upper or lower side of the leeward side. A refrigerant outlet is provided in the seventh section of the header portion located on the side,
The first tube group serves as a first path in which the refrigerant flows through the heat exchange tube from the side where the refrigerant inlet is located, to the opposite side, and the second tube group passes through the heat exchange tube. The second pass flows in the opposite direction to the first pass, the third tube group becomes the third pass in which the refrigerant flows in the same direction as the first pass through the heat exchange tube, and the fourth and fifth tube groups become the refrigerant. The fourth path flows in the direction opposite to the first path in the heat exchange tube, the sixth tube group becomes the fifth path in which the refrigerant flows in the same direction as the first path in the heat exchange tube, and the seventh tube group The fourth and fifth tubes have a sixth path in which the refrigerant flows in the direction opposite to the first path in the heat exchange tube, and the fourth path has the same flow direction of the refrigerant in the heat exchange tube. Groups are arranged side by side in the ventilation direction It is more structure,
The fourth tube group in the leeward tube row is the farthest tube group, and the fourth section of the header portion on the opposite side to the side where the refrigerant inlet is provided in either the upper or lower header portion on the leeward side is the fourth tube group. In addition to the farthest section upstream in the refrigerant flow direction through which the heat exchange tube is communicated, a resistance member for shunting is provided in the fourth section to divide the fourth section into a first space and a second space. The refrigerant is configured to flow into the second space of the fourth section from the third section of the header portion opposite to the side where the refrigerant inlet is provided. Evaporator in any one. The evaporator according to any one of claims 1 to 9, wherein the refrigerant inlet is provided in the leeward upper header portion, and the refrigerant outlet is provided in the leeward upper header portion.

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