JP2019138507A - Evaporator with cold storage function - Google Patents

Abstract

To provide an evaporator with a cold storage function, capable of efficiently draining condensed water occurring on an external surface of a cold storage material container.SOLUTION: An evaporator 1 with a cold storage function includes: a first header tank having upper headers at a downstream side and an upstream side; second header tanks 3 having lower headers 11 at a downstream side and an upstream side; a heat exchange tube 4 arranged between both header tanks 3; and a cold storage material container 19. The second header tank 3 is formed with a drain groove 14 opening upward and extending in the longitudinal direction of both lower headers 11. A part to be a bottom wall 14a of the drain groove 14 is formed with a penetrating drain hole 69 for dropping water in the drain groove 14 to below the second header tank 3 so as to be positioned below at least a part of the cold storage material container 19. At least a part of the drain hole 69 below the cold storage material container 19 is overlapped on the cold storage material container 19 when viewed from downward.SELECTED DRAWING: Figure 7

Description

  The present invention relates to an evaporator with a cold storage function used in a car air conditioner of a vehicle that temporarily stops an engine that is a drive source of a compressor when the vehicle is stopped.

  In the present specification and claims, the upper and lower sides of each drawing are referred to as the upper and lower sides.

  In recent years, automobiles have been proposed that automatically stop the engine when the vehicle stops, such as when waiting for a signal, for the purpose of environmental protection or improvement in automobile fuel efficiency.

  However, in a normal car air conditioner, when the engine is stopped, the compressor using the engine as a driving source stops, so that there is a problem that the refrigerant is not supplied to the evaporator and the cooling capacity is rapidly reduced.

  Therefore, in order to solve such problems, the evaporator is provided with a cold storage function, and when the engine stops and the compressor stops, the cold stored in the evaporator is discharged to cool the vehicle interior. Is considered.

  As an evaporator with this type of cool storage function, a first upper header, a second upper header arranged in parallel in the ventilation direction so as to be parallel to the first upper header, and a first upper header below the first upper header A first lower header arranged parallel to the header; a second lower header arranged below the second upper header; and parallel to the second upper header and the first lower header; A plurality of first heat exchange tubes disposed between the upper header and the first lower header and having upper and lower ends connected to the first upper header and the first lower header; a second upper header and a second lower header; A plurality of second heat exchange tubes that are arranged so as to be lined up with the first heat exchange tube in the ventilation direction and whose upper and lower ends are connected to the second upper header and the second lower header, and a regenerator material are enclosed A plurality of regenerator containers, and a first lower header And the second lower header is provided in one header tank, and a plurality of tube sets each including a first heat exchange tube and a second heat exchange tube arranged side by side in the ventilation direction are arranged at intervals in the longitudinal direction of all the headers. By doing so, a plurality of gaps are formed between the tube sets adjacent to each other in the longitudinal direction of all headers, and the cool storage material container is a part of the whole gap and the first and second gaps in the plurality of gaps. It is known that the outer fin is disposed so as to be in contact with the heat exchange tube, and the outer fin is disposed so as to be in contact with the first and second heat exchange tubes in the remaining part of the entire gap and in a plurality of gaps.

  According to the evaporator with a cold storage function as described above, during normal cooling when the compressor is operating, the cold heat of the refrigerant flowing in the first and second heat exchange tubes is transmitted to the cold storage material in the cold storage material container. When the compressor is stopped, the cold energy stored in the cool storage material in the cool storage material container is transmitted to the outer fins through the first and second heat exchange tubes, and from the outer fin. When the engine is stopped and the compressor is stopped, the vehicle interior is cooled by using the cold energy stored in the evaporator when the engine is stopped and the compressor is stopped. This makes it possible to suppress a rapid decrease in the cooling capacity when the engine is stopped.

  By the way, when the compressor is operated, the condensed water generated on the outer surface of the cool storage material container may freeze, and therefore, it is necessary to effectively drain the condensed water.

  In view of this, the present applicant, in the evaporator with the cool storage function having the above-described configuration, has the above-described structure in order to effectively drain the condensed water generated on the outer surface of the cool storage material container. In addition, a plurality of condensate drainage channels that are gradually lowered from the upper end to the lower end and open at both upper and lower ends are formed at intervals, and each condensate drainage channel is provided on the left and right side walls of the cool storage material container. The length of at least one of the two protrusions formed between the two protrusions bulging outward and forming one condensed water drainage channel is a container of the regenerator container. The evaporator with a cool storage function which has become longer than the width | variety of the ventilation direction of a main-body part was proposed (refer patent document 1).

  According to the evaporator with a cold storage function described in Patent Document 1, when the condensed water generated on the left and right side walls of the cold storage material container accumulates in the condensed water drainage channel along the two convex portions by surface tension, When the amount of accumulated condensed water increases, the gravity acting on the accumulated condensed water becomes larger than the surface tension and flows down in the condensed water drainage channel at once. Therefore, the time for the condensed water to stay in the condensed water drainage channel is shortened, and the condensed water generated on the outer surfaces of the left and right side walls of the cool storage material container can be smoothly flowed down to the cool storage material container.

  However, the condensed water that flows down below the cool storage material container may accumulate on the header tank provided with the first lower header and the second lower header, and may not be drained efficiently.

JP 2014-126307 A

  The objective of this invention is providing the evaporator with a cool storage function which can discharge | emit the condensed water which solved the said problem and generate | occur | produced on the outer surface of the cool storage material container efficiently.

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

1) The first upper header, the second upper header arranged in parallel in the ventilation direction so as to be parallel to the first upper header, and below the first upper header so as to be parallel to the first upper header A first lower header, a second lower header arranged below the second upper header and in parallel with the second upper header and the first lower header, a first upper header, and a first lower header; A plurality of first heat exchange tubes whose upper and lower ends are connected to the first upper header and the first lower header, and a first heat between the second upper header and the second lower header. A plurality of second heat exchange tubes that are arranged so as to be aligned with the exchange tube in the ventilation direction and whose upper and lower ends are connected to the second upper header and the second lower header, and a plurality of regenerator containers that enclose the regenerator material The first lower header and the second lower header are combined into one header tank. In the longitudinal direction of all the headers, a plurality of tube sets including the first heat exchange tubes and the second heat exchange tubes arranged side by side in the ventilation direction are arranged at intervals in the longitudinal direction of all the headers. A plurality of gaps are formed between adjacent tube sets, and the regenerator container is disposed so as to be in contact with the first and second heat exchange tubes in a part of the gaps and in the plurality of gaps. An evaporator with a cold storage function,
In the header tank in which the first lower header and the second lower header are provided, drainage grooves that open upward and extend in the longitudinal direction of both lower headers are formed. The drainage hole for dropping the water in the drainage groove below the header tank is formed so as to be positioned below at least a part of the regenerator container, and at least one of the drainage holes below the regenerator container. The evaporator with the cool storage function that the part overlaps with the cool storage material container as seen from below.

  2) In the header tank, the first lower header and the second lower header are integrally connected by a connecting portion, a drainage groove is formed by both the lower header and the connecting portion, and the connecting portion is a bottom wall of the drainage groove. The evaporator with a cold storage function as described in 1) above.

  3) The evaporator with a cold storage function according to 1) or 2), wherein the drainage hole is a long hole whose longitudinal direction faces the longitudinal direction of the lower headers.

  4) The cool storage material container is flat and is arranged with the longitudinal direction facing the up and down direction and the width direction facing the ventilation direction. A plurality of condensate drainage channels are formed, and the condensate drainage channels are formed between the two convex portions provided on the left and right side walls of the cold storage material container and bulging outward. The evaporator with a cool storage function according to any one of 3).

  5) Between the first upper header and the first lower header, a plurality of first heat exchange tubes, a first downflow tube group in which the refrigerant flows from top to bottom, and a plurality of first heat exchange tubes And a first upward flow tube group adjacent to the first downward flow tube group, and a plurality of second heats are provided between the second upper header and the second lower header. A second downflow tube group comprising an exchange tube and flowing refrigerant from top to bottom and arranged in the ventilation direction with respect to the first downflow tube group is provided, and the first downflow tube group is provided in the first upper header. A first compartment that communicates with the upper end of the first upward flow tube group, and a second compartment through which the upper end of the first upward flow tube group communicates and the refrigerant flows out toward the first compartment. A third compartment communicating with the lower end of the flow tube group, and a first upward flow A fourth section that is communicated with the lower end of the tube group and is separated from the third section is provided, and a fifth section that is communicated with the upper end of the second downflow tube group is provided on the second upper header. The lower header is provided with a sixth section that communicates with the lower end of the second downflow tube group, and is provided with an upper refrigerant passage section that passes through both sections between the first section and the fifth section, A lower refrigerant passage section is provided between the sixth compartment and the lower refrigerant storage container disposed in the portion where the first downflow tube group and the second downflow tube group are provided. The evaporator with a cold storage function according to any one of the above 1) to 4), wherein a portion without a drain hole is formed in a portion that becomes a bottom wall of the drain groove in the continuous header tank .

  6) A downflow tube group is provided between the first upper header and the first lower header, the first heat exchange tube and the refrigerant flowing from the top to the bottom, and the second upper header and the second lower header, And an upflow tube group that is composed of a second heat exchange tube and flows from the bottom to the top and that is aligned in the ventilation direction with respect to the downflow tube group, and the downflow tube group is provided in the first upper header. A first upper section that communicates with the upper end of the tube, a first lower section that communicates with the lower end of the downflow tube group at the first lower header, and an upper end of the upflow tube group communicates with the second upper header. 1) to 4) above, wherein the second upper section is provided, the second lower header is connected to the lower end of the upflow tube group, and the second lower section is provided in communication with the first lower section. The evaporator with a cool storage function as described in any one of them.

  7) The first heat exchange tube and the second heat exchange tube have a flat shape, and are arranged with the longitudinal direction directed in the up-down direction and the width direction in the ventilation direction, and a plurality of gaps remaining in the entire gap are provided. The evaporator with a cold storage function according to any one of the above 1) to 6), wherein the outer fin is disposed so as to contact the first heat exchange tube and the second heat exchange tube.

  According to the evaporator with a cold storage function of 1) to 7) above, the drainage groove that opens upward and extends in the longitudinal direction of the lower headers is provided in the header tank in which the first lower header and the second lower header are provided. Formed in the part that will be the bottom wall of the drainage groove in the header tank so that the through drainage hole that drops the water in the drainage groove below the header tank is located below at least some of the regenerator containers Since at least a part of the drainage hole below the cool storage material container overlaps with the cool storage material container when viewed from below, the condensed water generated on the outer surface of the cool storage material container is placed on the outer surface of the cool storage material container. And then flows down onto the header tank provided with the first lower header and the second lower header, and then enters the drainage groove, and is drained below the header tank through the drainage hole. Therefore, the drainage from the cool storage material container of the evaporator with a cool storage function is improved.

  According to the evaporator with the cold storage function of 4) above, if the condensed water generated on the outer surfaces of the left and right side walls of the cold storage material container accumulates in the condensed water drainage channel along the two convex portions due to surface tension, it accumulates. As the amount of condensed water increases, the gravity acting on the accumulated condensed water becomes larger than the surface tension and flows down in the condensed water drainage channel at once. Therefore, the time during which the condensed water stays in the condensed water drainage path is shortened, and the condensed water generated on the outer surfaces of the left and right side walls of the cold storage material container can be smoothly drained.

It is the perspective view which abbreviate | omitted one part which shows the whole structure of the evaporator with a cool storage function of this invention. It is a perspective view which shows the flow of a refrigerant | coolant while showing roughly the whole structure of the evaporator with a cool storage function of FIG. It is an AA line expanded sectional view of FIG. FIG. 4 is a partially enlarged view of FIG. 3. It is a disassembled perspective view which shows the upper header tank of the evaporator with a cool storage function of FIG. It is the elements on larger scale of the part different from FIG. 4 of FIG. It is the BB sectional drawing of FIG. 6 which abbreviate | omitted one part. It is a disassembled perspective view which shows the lower header tank of the evaporator with a cool storage function of FIG. It is a perspective view which shows the whole structure of other embodiment of the evaporator with a cool storage function of this invention, and shows the flow of a refrigerant | coolant.

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

  In the following description, the downstream side in the ventilation direction (the direction indicated by the arrow X in FIGS. 1 to 3 and 9) is referred to as the front, and the opposite side is referred to as the rear.

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

  1 and 2 show the overall configuration of an evaporator with a cold storage function according to the present invention, and FIGS. 3 to 8 show the configuration of the main part thereof. In the description of the embodiment shown in FIGS. 1 to 8, the left and right (left and right in FIG. 1) when viewing the upstream side from the downstream side in the ventilation direction are referred to as left and right.

  1 to 3, the evaporator (1) with a cold storage function includes an aluminum first header tank (2) and an aluminum second one arranged at intervals in the vertical direction with the longitudinal direction thereof being directed in the left-right direction. A header tank (3) and a plurality of heat exchange tubes (4) arranged between the header tanks (2) and (3) are provided.

  The first header tank (2) has an aluminum leeward upper header (5) (first upper header) with the longitudinal direction left and right and the leeward side of the leeward upper header (5). An aluminum windward upper header (6) (second upper header) which is directed in the direction and parallel to the leeward upper header (5) is integrally provided via a connecting portion (7). A refrigerant inlet (8) is provided at the right end of the leeward upper header (5), and a refrigerant outlet (9) is provided at the right end of the leeward upper header (6).

  The second header tank (3) has an aluminum leeward lower header (11) (first lower header) that is parallel to the leeward upper header (5) and the leeward lower side. On the windward side of the header (11), the windward upper header (12) made of aluminum (second) with the longitudinal direction facing left and right and parallel to the windward upper header (6) and the leeward lower header (11) And a lower header) are integrally provided via the connecting portion (13). The upper side of the second header tank (3) is opened in the portion between the leeward lower header (11) and the leeward lower header (12) and in the longitudinal direction of the lower headers (11) (12). An extending drainage groove (14) is formed.

  A plurality of aluminum leeward sides with upper and lower ends connected to the leeward upper header (5) and the leeward lower header (11) between the leeward upper header (5) and the leeward lower header (11) The heat exchange tube (4) (first heat exchange tube (4)) is arranged, and the upper and lower ends are located between the windward upper header (6) and the windward lower header (12). And a plurality of aluminum upwind heat exchange tubes (4) (second heat exchange tubes (4)) connected to the upwind lower header (12). The heat exchange tube (4) has a flat shape, and is arranged at intervals in the left-right direction with the width direction directed to the ventilation direction indicated by the arrow X in FIGS. 1 to 3 and the longitudinal direction directed to the vertical direction. ing. The heat exchange tubes (4) arranged between the leeward upper header (5) and the leeward lower header (11) constitute the leeward tube row (15), and the windward upper header (6) and the windward upper header (5). An upwind tube row (16) is constituted by the heat exchange tube (4) arranged between the lower header (12). The number of heat exchange tubes (4) in the leeward tube row (15) is equal to the number of heat exchange tubes (4) in the windward tube row (16).

  The heat exchange tube (4) in the leeward tube row (15) and the heat exchange tube (4) in the windward tube row (16) are in the same position in the left-right direction, and two heat exchange tubes ( 4) constitutes a tube set (17), and gaps (18A) (18B) are formed between the tube sets (17) adjacent in the left-right direction. Aluminum heat storage container (19) is part of total gap (18A) (18B) and a plurality of container gaps (18A), and two heat exchange tubes (4 The cold storage material container (19) is joined via the brazing material in contact with the two heat exchange tubes (4). Hereinafter, joining through a brazing material is referred to as brazing. Further, the remainder of the total gap (18A) (18B) and a plurality of fin gaps (18B) are made of an aluminum brazing sheet having a brazing filler metal layer on both sides, and the wave crest extends in the front-rear direction, in the front-rear direction. Outer fin (21) consisting of extended wave bottom part and connecting part that connects wave crest part and wave bottom part is arranged so as to straddle the two heat exchange tubes (4) constituting each tube set (17) The outer fin (21) is brazed in contact with both heat exchange tubes (4). In addition, the outer fins (21) are also arranged outside the tube sets (17) at both left and right ends so as to straddle the two heat exchange tubes (4) constituting the tube set (17). The aluminum side plate (22) is disposed outside the outer fins (21) at both the left and right ends and brazed to the outer fins (21).

  The leeward side tube row (15) is composed of a plurality of heat exchange tubes (4) arranged in series, and the refrigerant flows from the top to the bottom, and the left end side (the end side opposite to the refrigerant inlet (8)) And a first downflow tube group (23) provided in the base, and a plurality of heat exchange tubes (4) arranged in series, and the refrigerant flows from the bottom to the top, and the first downflow tube group (23) And a first upward flow tube group (24) provided adjacent to the right side (the refrigerant inlet (8) side). The windward side tube row (16) is composed of a plurality of heat exchange tubes (4) arranged in series, and the refrigerant flows from top to bottom, and is arranged side by side on the windward side of the first downflow tube group (23). The second downflow tube group (25) is provided. The leeward side tube row (15) includes a plurality of heat exchange tubes (4) arranged in series, and the refrigerant flows from top to bottom, and is adjacent to the right side of the first upflow tube group (24). A windward tube array (16) comprising a plurality of heat exchange tubes (4) arranged in series, and the refrigerant flows from the bottom to the top, and A second upward flow tube group (27) is provided adjacent to the right side of the second downward flow tube group (25).

  The first downflow tube group (23) is the farthest tube group located farthest from the refrigerant inlet (8) in the leeward tube row (15), and the third downflow tube group (26) is the leeward side tube group (15). The tube group closest to the refrigerant inlet (8) in the tube row (15). The second downflow tube group (25) is the farthest tube group located farthest from the refrigerant outlet (9) in the windward tube row (16), and the second upflow tube group (27) It is a group of recent tubes located closest to the refrigerant outlet (9). Therefore, the leeward tube row (15) and the windward tube row (16) are composed of a plurality of heat exchange tubes (4) and the refrigerant flows from the bottom to the top, and the refrigerant flows from the bottom to the top. Ascending flow tube groups are provided alternately.

  The number of heat exchange tubes (4) constituting the first downflow tube group (23) of the leeward tube row (15) constitutes the second downflow tube group (25) of the upwind tube row (16). The number of heat exchange tubes (4) is the same, and the width in the left-right direction of both tube groups (23) and (25) is the same, and one tube path is constituted by both tube groups (23) and (25). ing. The total number of heat exchange tubes (4) constituting the third downflow tube group (26) and the first upflow tube group (24) is the same as the heat exchange tubes (4 The total width in the left-right direction of the third downflow tube group (26) and the first upflow tube group (24) is the width in the left-right direction of the second upflow tube group (27). Is the same. The remaining tube groups (24), (26) and (27) excluding the first downflow tube group (23) and the second downflow tube group (25) each constitute a single path.

  The leeward upper header (5) is provided on the left end side, and the leeward upper left section (28) (first section) through which the upper end of the heat exchange tube (4) of the first downflow tube group (23) communicates And the upper end of the heat exchange tube (4) of the first upflow tube group (24) and adjacent to the right side of the leeward upper left compartment (28), and the leeward upper left compartment (28) The leeward upper center section (29) (second section) from which the refrigerant flows to the left toward the left and the right side of the leeward upper center section (29) and the third downflow tube group (26 ) On the leeward side upper right section (31) leading to the upper end of the heat exchange tube (4). Between the leeward side upper left compartment (28) and the leeward side upper central compartment (29), an aluminum flow dividing control plate (through hole (32a) through which both compartments (28) and (29) are formed is formed ( 32) is arranged, and the refrigerant flows straight from the upper part of the leeward upper central section (29) through the through hole (32a) of the flow dividing control plate (32) to the left, and the leeward upper left section (28). Flow into. Between the leeward side upper central section (29) and the leeward side upper right section (31), an aluminum dividing plate (33) that separates both sections (29) and (31) is disposed. The leeward upper right section (31) leads to the refrigerant inlet (8).

  The windward upper header (6) is provided on the left end side, and the windward upper left section (34) (third section) through which the upper end of the heat exchange tube (4) of the second downflow tube group (25) communicates A windward upper right section (35) provided adjacent to the right side of the windward upper left section (34) and leading to the upper end of the heat exchange tube (4) of the second upflow tube group (27). I have. Between the windward upper left section (34) and the windward upper right section (35), an aluminum dividing plate (36) that separates both sections (34) and (35) is disposed. The windward upper right section (35) leads to the refrigerant outlet (9).

  The leeward lower header (11) is provided on the left end side and the leeward lower left section (37) (fourth section) through which the lower end of the heat exchange tube (4) of the first downflow tube group (23) communicates A leeward lower central section (38) provided adjacent to the right side of the leeward lower left section (37) and leading to the lower end of the heat exchange tube (4) of the first upward flow tube group (24); It is provided adjacent to the right side of the leeward lower center section (38) and communicates with the lower end of the heat exchange tube (4) of the third downflow tube group (26), and the leeward side lower center section (38) has a refrigerant. And a leeward lower right section (39) from which the gas flows out. Between the leeward lower left compartment (37) and the leeward lower center compartment (38), an aluminum dividing plate (41) is disposed to separate the compartments (37) and (38). There is no partition between the leeward lower middle section (38) and the leeward lower right section (39), and the refrigerant flows straight from the leeward lower right section (39) to the left, and the leeward lower center section (38 ).

  The windward lower header (12) is provided on the left end side, and the windward lower left section (42) (fifth section) through which the lower end of the heat exchange tube (4) of the second downflow tube group (25) communicates And on the right side of the windward lower left section (42), the lower end of the heat exchange tube (4) of the second upflow tube group (27) communicates, and the windward lower left section (42) And a windward lower right section (43) through which the refrigerant flows from. There is no partition between the windward lower left compartment (42) and the windward lower right compartment (43), and the refrigerant flows straight from the windward lower left compartment (42) to the right, and the windward lower right compartment (43 ).

  The lengths in the left-right direction of the leeward upper left section (28), the leeward lower left section (37), the windward upper left section (34), and the windward lower left section (42) are equal. The lengths in the left-right direction of the leeward side upper central section (29) and the leeward side lower central section (38) are equal. The lengths of the leeward side upper right section (31) and the leeward side lower right section (39) in the left-right direction are equal. Also, the length in the left-right direction of the windward upper right section (35) and the windward lower right section (43) are equal, and the length is equal to the length in the left-right direction of the leeward upper center section (29). It is equal to the total length of the length of the leeward upper right section (31) in the left-right direction, and the length in the left-right direction of the leeward lower center section (38) and the left and right of the leeward lower right section (39) It is equal to the total length of the direction lengths.

  Between the leeward upper left compartment (28) and the windward upper left compartment (34), an upper refrigerant passage portion (44) is formed through both compartments (28) (34), and the leeward lower left compartment (37 ) And a windward lower left section (42), a lower refrigerant passage portion (45) is formed through both sections (37) and (42).

  As shown in FIGS. 3 to 5, the first header tank (2) forms the lower part of the leeward upper header (5) and the leeward upper header (6), and both the tube rows (15) (16). The first aluminum member (46) to which the heat exchange tube (4) is connected, and the first member (46) brazed to the first member (46) opposite to the heat exchange tube (4) ( An aluminum second member (47) that covers the upper side and forms the upper part of the leeward upper header (5) and the windward upper header (6), and a first member (46) and a second member (47) Two partition portions (49) (49) that are arranged between and divide the leeward upper header (5) and the leeward upper header (6) into upper and lower spaces (5a) (5b) (6a) (6b), respectively. 51) an aluminum third member (48) having a refrigerant inlet (8) and a refrigerant outlet (9), and brazed to the right end of the first to third members (46), (47) and (48). And an end member (52). Here, the upper refrigerant passage portion (44) is a portion existing in the leeward upper left section (28) in the upper space (5a) of the leeward upper header (5) and the upper airflow upper header (6). It passes through the part existing in the windward upper left section (34) in the space (6a).

  The first member (46) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and has a substantially U-shaped cross section that forms the lower part of the leeward upper header (5). First header forming portion (53), a second header forming portion (54) having a substantially U-shaped cross section that forms the lower portion of the windward upper header (6), and both header forming portions (53) (54) A connecting wall (55) that connects the two and forms the lower part of the connecting portion (7). In both header forming portions (53) and (54) of the first member (46), tube insertion holes (56) that are long in the front-rear direction are formed so as to be spaced apart in the left-right direction and located in the same part in the left-right direction. The upper end of the heat exchange tube (4) is inserted into the tube insertion hole (56) and brazed to the first member (46) using the brazing material layer of the first member (46). .

  The second member (47) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and has a substantially U-shaped transverse section that forms the upper portion of the leeward upper header (5). A first header forming portion (57), a second header forming portion (58) having a substantially U-shaped cross section that forms the upper portion of the upwind header (6), and both header forming portions (57) (58 And a connecting wall (59) that connects the two and constitutes the upper part of the connecting portion (7). In the second member (47) where the first downflow tube group (23) is provided, a concave portion (61) opened to the heat exchange tube (4) side and recessed upward is formed as a first header. By deforming the portion (57), the second header forming portion (58), and the connecting wall (59), they are formed at intervals in the left-right direction.

  The third member (48) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and the front and rear partition portions (49) (51) are connected to each other by the first member (46). It is interposed between the connecting wall (55) and the connecting wall (59) of the second member (47) and brazed to both connecting walls (55) (59), and the connecting portion (7) in the vertical direction They are connected and integrated by a connecting wall (62) forming a central portion. Then, the lower end opening of the recessed portion (61) of the second member (47) is closed by the connecting wall (62) of the third member (48), whereby the upper space of the leeward upper header (5). (5a) through the part existing in the leeward upper left section (28) and the part present in the leeward upper left section (34) in the upper space (6a) of the windward upper header (6) A refrigerant passage part (44) is provided.

  A portion between the first downflow tube group (23) and the first upflow tube group (24) in the front partitioning portion (49) of the third member (48), and the first upflow tube group (24); The portion between the third downflow tube group (26) and the second downflow tube group (25) and the second upflow tube group (27) in the rear partition (24) of the third member (48) A slit (63) that is long in the front-rear direction is formed in a portion between the two.

  A through hole (32a) is formed in the upper part of the slit (63) between the first downflow tube group (23) and the first upflow tube group (24) in the front partition (49), and the lower part Is inserted with an aluminum shunt control plate (32) that separates the part existing in the leeward upper center section (29) and the part existing in the leeward upper left section (28) in the lower space (5b). The first to third members (46), (47) and (48) are brazed. In addition, the slit (63) between the first upflow tube group (24) and the third downflow tube group (26) in the front partition (49) has a leeward side in the upper and lower spaces (5a) and (5b). The dividing plate (33) separating the part existing in the upper central section (29) and the part existing in the leeward upper right section (31) is inserted, and the first to third members (46) (47) ( 48) is brazed. In the slit (38) between the second downflow tube group (25) and the second upflow tube group (27) in the rear partition (24), the upwind side in the upper and lower spaces (6a) (6b) A dividing plate (36) that separates a portion existing in the left section (34) and a portion existing in the windward upper right section (35) is inserted, and the first to third members (46) (47) (48) It is brazed.

  A portion of the third member (48) on the left side of the first downflow tube group (23) in the front partition (49) and a left side of the second downflow tube group (25) in the rear partition (51) In this part, slits (64) that are long in the front-rear direction are formed. A closing plate (65) for closing the left end portion of the leeward side upper header (5) is inserted into the slit (64) of the front partitioning portion (49) to insert the first to third members (46) (47) (48). A closing plate (65) for closing the left end of the windward upper header (6) is inserted into the slit (64) of the rear partition (51) by being brazed to the first to third members (46). (47) Brazed to (48).

  In the upper and lower spaces (5a) and (5b) of the leeward side upper header (5), the portions existing in the leeward upper center section (29) and the leeward side upper right section (31), and the leeward upper header (6) The parts existing in all the compartments (34) and (35) in the upper and lower spaces (6a) and (6b) are respectively left and right in the front partition (49) and the rear partition (51) of the third member (48). Are connected to each other through a plurality of refrigerant passage holes (66) formed by long holes in the front-rear direction formed at intervals. In addition, the portions existing in the leeward upper left section (28) in the upper and lower spaces (5a) (5b) of the leeward upper header (5) are arranged in front of the front partition (49) of the third member (48). It is made to communicate with the central part of the direction through a plurality of circular refrigerant passage holes (67) formed at intervals in the left-right direction. Here, the total cross-sectional area of the plurality of circular refrigerant passage holes (67) is obtained by passing through the portions existing in the windward upper left section (34) of the upper and lower spaces (6a) (6b) in the rear partition (51). The total cross-sectional area of the refrigerant passage hole (66) to be made is preferably 5 to 70%.

  The front and rear partition sections (49) and (51) of the third member (48) have a notch (68) formed from the right end thereof, and the notch (68) of the front partition section (49) The upper and lower spaces (5a) and (5b) of the header (5) are communicated with each other, and the refrigerant inlet (8) is communicated with both the upper and lower spaces (5a) and (5b), so that the rear partition (51) The notch (68) allows the upper and lower spaces (6a) and (6b) of the windward upper header (6) to communicate with each other and the refrigerant outlet (9) to communicate with both spaces (6a) and (6b). Yes.

  The refrigerant inlet (8) of the end member (52) communicates with a portion existing in the leeward upper right section (31) in the upper and lower spaces (5a) and (5b) of the leeward upper header (5), and the refrigerant outlet ( 9) leads to a portion existing in the windward upper right section (35) in both the upper and lower spaces (6a) and (6b) of the windward header (6).

  As shown in FIGS. 3 and 6 to 8, the second header tank (3) has substantially the same configuration as the first header tank (2), and is disposed upside down with respect to the first header tank (2). Has been. The same parts as those of the first header tank (2) in the second header tank (3) are denoted by the same reference numerals. The second header tank (3) is not provided with the refrigerant inlet (8) and the refrigerant outlet (9), and therefore does not include the end member (52). And the 1st member (46) forms the upper part which becomes the heat exchange tube (4) side of the leeward side lower header (11) and the windward side lower header (12), and the 2nd member (47) is the 1st member ( The lower side of the leeward lower header (11) and the leeward lower header (12) are formed so as to cover the opposite side of the heat exchange tube (4) in 46). The front partition (49) of the third member (48) partitions the leeward lower header (11) vertically into two spaces (11b) (11a), and the rear partition (51) is on the windward side. The inside of the lower header (12) is partitioned into two spaces (12b) (12a) in the vertical direction. The lower space (11a) (12a) of the leeward lower header (11) and the leeward lower header (12) is the upper space (5a) (6a) of the leeward upper header (5) and the windward upper header (6). Similarly, the upper space (11b) (12b) has the same structure as the lower space (5b) (6b). The first member (46) and the second member (47) of the second header tank (3) have the same configuration as the first member (46) and the second member (47) of the first header tank (2). is there. The lower refrigerant passage portion (45) includes a portion present in the leeward lower left section (37) in the lower space (11a) of the leeward lower header (11) and a lower space (12a of the leeward lower header (12). ) In the windward lower left section (42).

  A slit (63) that is long in the front-rear direction is formed in a portion between the first downflow tube group (23) and the first upflow tube group (24) in the front partition (49) of the third member (48). The slit (63) is divided into the upper and lower spaces (11b) (11a) separating the part existing in the leeward lower left compartment (37) and the part existing in the leeward central compartment (38). A plate (41) is inserted and brazed to the first to third members (46), (47) and (48).

  The parts existing in all sections (37), (38), (39) of the upper and lower spaces (11b) (11a) of the leeward lower header (11) and the upper and lower spaces (12b) of the leeward lower header (12) ( The parts existing in all the sections (42) and (43) of 12a) are from long slots in the front-rear direction formed in the front-side partition part (49) and the rear-side partition part (51) with a space in the left-right direction. And a plurality of refrigerant passage holes (66).

  A portion of the third member (48) on the right side of the third downward flow tube group (26) in the front partition portion (49) and a right side of the second upward flow tube group (27) in the rear partition portion (51) A slit (64) that is long in the front-rear direction is formed in each of the portions, and a closing plate (65) that closes the right end of the leeward lower header (11) in the slit (64) of the front partition (49) Is inserted and brazed to the first to third members (46), (47) and (48), and the right end of the upwind lower header (12) is closed in the slit (64) of the rear partition (51) A closing plate (65) is inserted and brazed to the first to third members (46), (47) and (48).

  The drainage groove (14) of the second header tank (3) is connected to the first header forming part (53), the second header forming part (54), and the leeward lower header (11) of the first member (46). The connecting portion (13) is connected to the upper lower header (12), and the connecting portion (13), that is, the connecting wall (55) of the first to third tank members (46) (47) (48). (59) (62) is the bottom wall (14a) of the drainage groove (14). A plurality of water drops in the drainage groove (14) are dropped below the second header tank (3) onto the connecting portion (13) which becomes the bottom wall (14a) of the drainage groove (14) in the second header tank (3). These through-hole drain holes (69) are formed at intervals in the left-right direction so as to be positioned below at least some of the cool storage material containers (19). The drain hole (69) is a long hole whose longitudinal direction faces the longitudinal direction (left and right direction) of the lower headers (11) and (12) of the second header tank (3), and at least a part of the regenerator container ( At least a part of the longitudinal direction of the drain hole (69) formed so as to be located below 19) overlaps with the cool storage material container (19) when viewed from below.

  For example, in the example shown in FIG. 7, the length of the drainage hole (69) in the left-right direction is substantially equal to the width in the left-right direction of the cold storage material container (19), and the longitudinal direction is entirely viewed from below. The drain hole (69) overlapping with the cool storage material container (19) located in the upper part and the drain hole (69) overlapping with the cool storage material container (19) located partly in the longitudinal direction when viewed from below. ) Are mixed. However, instead of this, the length in the left-right direction of at least some of the drain holes out of all through holes formed below at least some of the cold storage container (19) is the left and right of the cold storage container (19). It may be different from the width in the direction. If the horizontal length of the drainage hole below the cold storage material container (19) is shorter than the horizontal width of the cold storage material container (19), the drainage hole is located above the whole when viewed from below. There is a case where it overlaps with the cool storage material container (19) to be performed, and a case where a part overlaps with the cool storage material container (19) positioned above as viewed from below. On the other hand, when the horizontal length of the drainage hole below the cold storage material container (19) is longer than the horizontal width of the cold storage material container (19), a part of the cold storage is located above when viewed from below. Overlapping material container (19). In the portion where the cool storage material container (19) does not exist, the water in the drainage groove (14) is fed to the second header tank (14) into the connecting portion (13) which becomes the bottom wall (14a) of the drainage groove (14). A penetrating drain hole for dropping below 3) may be formed.

  The regenerator container (19) arranged in the portion where the first downflow tube group (23) and the second downflow tube group (25) are provided, that is, the leeward upper left section (28) and the leeward lower left tube The heat exchange tube (4) leading to the compartment (37) and the gap (18A) formed by the heat exchange tube (4) leading to the leeward upper left compartment (28) and the leeward lower left compartment (37). Below the cool storage material container (19), there is a holeless portion (70) in which no drainage hole is formed in the connecting portion (13) which becomes the bottom wall (14a) of the drainage groove (14).

  The cold storage material container (19) is a flat hollow shape of a substantially vertical rectangle in which the longitudinal direction is directed in the vertical direction and the width direction is directed in the front-rear direction, and an aluminum brazing sheet having a brazing filler metal layer on both sides is pressed. The peripheral belt-like portions (71a) having a constant width are formed of two substantially vertical rectangular aluminum container constituent plates (71), and both container constituent plates (71 ), In this case, the portion excluding the strip portion (71a) in both the container component plates (71) is bulged outward, so that the hollow regenerator enclosing portion (72) is formed. Is provided. Although illustration is omitted, the heat storage material is enclosed in the cold storage material enclosure (72) of the cold storage material container (19), and a heat conduction member that improves the heat transfer between the cold storage material and the left and right side walls, for example, Inner fins and other forms of heat conducting members are arranged.

  On the outer surfaces of the left and right side walls (19a) of the cold storage container (19), the upper and lower ends are open and the upper and lower ends are open, and the condensed water is drained from the lower end opening by flowing downward from above. A plurality of condensed water drainage channels (73) are formed at intervals in the front-rear direction. Each condensate drainage channel (73) is formed between two drainage channel projections (74) provided on the left and right side walls (19a) of the cold storage container (19) and bulging outward. The length of at least one drainage channel projection (74) of the two drainage channel projections (74) forming one condensed water drainage channel (73) is the length of the cold storage material container (19). It is longer than the width in the front-rear direction. The bulge heights of all drainage channel convex portions (74) on the left and right side walls (19a) of each cold storage material container (19) are equal, and the bulge ends of all drainage channel convex portions (74). The walls are on the same vertical plane. Further, the swelling of the portion located in the front-rear direction range of the two heat exchange tubes (4) constituting the left and right tube sets (17) forming the container gap (18A) in the drainage channel convex portion (74). The leading end wall is brazed in contact with the heat exchange tube (4). Two adjacent condensate drainage channels (73) share a drainage channel convex portion (74) located between the two condensate drainage channels (73).

  Condensate drainage channel (73) and drainage channel convex portion (74) on the left side wall (19a) of the cool storage material container (19), and condensate drainage channel (73) and drainage channel projection on the right side wall (19a) (74) is provided so as to be shifted in the front-rear direction within the same horizontal plane so as not to overlap with the whole. Instead, the condensate drainage channel (73) and drainage channel projection (74) on the left side wall (19a), and the condensate drainage channel (73) and drainage channel projection (74) on the right side wall (19b). ) Are provided so as to be symmetric with respect to a vertical plane passing through the center in the left-right direction of the cold storage material container (19), and may overlap as a whole. A very small amount of air also flows through the condensed water drainage channel (73).

  In the evaporator (1) with the cold storage function described above, the refrigerant that has flowed in from the refrigerant inlet (8) flows through the two paths and flows out from the refrigerant outlet (9) as follows. The first path consists of the leeward upper right section (31), the third downflow tube group (26), the leeward lower right section (39), the leeward lower center section (38), the first upflow tube group ( 24), the leeward upper center section (29), the through hole (32a) of the flow dividing control plate (32), the portion present in the leeward upper left section (28) in the upper space (5a), the circular refrigerant passage hole (67 ), A portion existing in the leeward upper left section (28) in the lower space (5b), the first downflow tube group (23), the leeward lower left section (37), the lower refrigerant passage section (45), the windward side The lower left section (42), the windward lower right section (43), the second upflow tube group (27), and the windward upper right section (35), the second path is the leeward upper right section (31 ), 3rd downflow tube group (26), leeward lower right section (39), leeward lower center section (38), 1st upflow tube group (24), leeward upper center section (29), split flow The through hole (32a) of the control plate (32), the part existing in the leeward upper left section (28) in the upper space (5a), the upper refrigerant passage part (4 4), windward upper left section (34), second downflow tube group (25), windward lower left section (42), windward lower right section (43), second upflow tube group (27) and Upwind upper right section (35).

  When considering the flow of the refrigerant, all other sections (29) (31) (34) (35) (37) (38) (39) (42) except the leeward upper left section (28) (43), that is, all compartments in which the upper and lower spaces communicate with each other by the refrigerant passage hole (66) formed by a long hole formed in the front partition portion (49) and the rear partition portion (51) of the third member (48). (29) (31) (34) (35) (37) (38) (39) (42) (43) are both upper and lower spaces (5a) (5b) (6a) (6b) (11b) (11a) (12b) It becomes one section without distinguishing (12a).

  The evaporator with a cold storage function (1) described above includes a compressor that uses a vehicle engine as a drive source, a condenser that cools the refrigerant discharged from the compressor (refrigerant cooler), and an expansion valve that depressurizes the refrigerant that has passed through the condenser ( A refrigeration cycle is configured together with a decompressor, and is mounted as a car air conditioner on a vehicle, such as an automobile, that temporarily stops an engine that is a drive source of a compressor when the vehicle stops. When the compressor is operating, the low-pressure gas-liquid mixed phase two-phase refrigerant that has been compressed by the compressor and passed through the condenser and the expansion valve passes through the two paths described above, and enters the refrigerant inlet (8 ) And out of the refrigerant outlet (9), the refrigerant flows in the heat exchange tubes (4) of the leeward tube row (15) and in the heat exchange tubes (4) of the leeward tube row (16). In the meantime, heat exchange is performed with the air passing through the ventilation gap between the adjacent heat exchange tubes (4), the air is cooled, and the refrigerant flows out as a gas phase.

  During the operation of the compressor, the cold heat of the refrigerant flowing in the heat exchange tubes (4) on the left and right sides of the gap (18A) where the cool storage material container (19) is arranged is 19a) is transferred to the entire left and right side walls (19a) including the bulging end wall via the bulging end wall of the drainage channel convex portion (74) provided on the left and right side walls (19a). ) Is transmitted to the cold storage material in. Further, the cold heat transmitted to the entire left and right side walls (19a) of the cold storage material container (19) is transferred to the cold storage material through a heat conduction member (not shown). Thus, cold heat is stored in the cold storage material in the cold storage material container (19).

  In addition, when the compressor is operating, condensed water is generated on the surface of the regenerator container (19), and the condensed water enters the condensed water drainage channel (73), and on both sides of the condensed water drainage channel (73) due to surface tension. It accumulates in the condensed water drainage channel (73) along the drainage channel convex portion (74). When the amount of accumulated condensed water increases, the gravity acting on the accumulated condensed water becomes greater than the surface tension, and flows down in the condensed water drainage channel (73) and falls onto the second header tank (3). At least a part of the condensed water falling on the second header tank (3) enters the drainage groove (14) and is drained below the second header tank (3) through the drainage hole (69).

  On the other hand, when the compressor is stopped, the cold energy stored in the cold storage material in the cold storage material container (19) is directly on the left and right sides including the bulging end walls of the drainage projection (74) of the cold storage material container (19). It is transmitted to the entire wall (19a) and to the entire left and right side walls (19a) of the cool storage material container (19) through a heat conduction member (not shown). The cold heat transmitted to the left and right side walls (19a) of the cold storage material container (19) passes through the heat exchange tube (4) and is transmitted to the outer fin (21) disposed in the adjacent fin gap (18B), It is transmitted to the air passing through the fin gap (18B) where the outer fin (21) is disposed. Therefore, even if the temperature of the wind that has passed through the evaporator with a cold storage function (1) rises, the wind is cooled, so that a rapid decrease in cooling capacity is prevented.

  FIG. 9 schematically shows another embodiment of the evaporator with a cold storage function according to the present invention.

  The evaporator (80) with a cold storage function shown in FIG. 9 includes an aluminum first header tank (81) and an aluminum second header tank (with an interval in the vertical direction with the longitudinal direction facing the left and right direction) 82) and the flow of refrigerant differ from the evaporator (1) with the cold storage function shown in FIGS. 1 to 8, and the heat exchange tube (4), the cold storage material container (19), the outer fin (21) and The configuration of the side plate (22) and the like is the same as that of the evaporator (1) with a cold storage function. Therefore, in FIG. 9, while showing the structure of a 1st header tank (81) and a 2nd header tank (82) schematically, how to flow a refrigerant | coolant is shown.

  In FIG. 9, an aluminum leeward upper header (83) (first upper header) and a leeward upper header, the longitudinal direction of which is the left-right direction of the first header tank (81) of the evaporator (80) with a cold storage function. On the windward side of (83), an aluminum windward upper header (84) (second upper header) whose longitudinal direction is directed in the left-right direction and parallel to the leeward upper header (83) is connected to the connecting portion ( (Not shown). The leeward side upper header (83) is divided into two upper and lower spaces (83a) and (83b) by the partition member (85) over the entire length. The windward upper header (84) is divided into two upper and lower spaces (84a) and (84b) over the entire length by a partition member (86). The upper and lower spaces (83a) and (83b) of the leeward upper header (83) communicate with each other through a communication hole (87) formed in the left end portion of the partition member (85). The upper and lower spaces (84a) (84b) of the windward upper header (84) communicate with the partition member (86) through a plurality of refrigerant passage holes (88) formed at intervals in the left-right direction. A refrigerant inlet (89) that leads to the upper space (83a) is provided at the right end of the leeward upper header (83), and a refrigerant outlet that leads to the upper space (84a) at the right end of the windward upper header (84). 91).

  The second header tank (3) has an aluminum leeward lower header (92) (first lower header) that is parallel to the leeward upper header (83) with the longitudinal direction turned to the left and right, and the leeward lower On the windward side of the header (92), the windward upper header (93) made of aluminum (second) is oriented parallel to the windward upper header (84) and the leeward lower header (92) with the longitudinal direction turned to the left and right. And a lower header) are integrally provided via a connecting portion (94). The windward lower header (93) is divided into two upper and lower spaces (93a) and (93b) over the entire length by a partition member (95). The upper and lower spaces (93a) and (93b) of the windward lower header (93) communicate with the partition member (95) through a plurality of refrigerant passage holes (96) formed at intervals in the left-right direction. Further, the inside of the leeward lower header (92) and the lower space (93b) of the leeward lower header (93) are connected via a communication portion (not shown) provided at the right end of the second header tank (82). Through.

  A drainage groove (14) that opens upward and extends in the longitudinal direction of the lower headers at a portion between the leeward lower header (92) and the windward lower header (93) on the upper surface of the second header tank (82). Is formed.

  The drainage groove (14) of the second header tank (82) connects the leeward lower header (92), the leeward lower header (93), and the leeward lower header (92) and the windward lower header (93). The connecting portion (94) is formed, and the connecting portion (94) serves as a bottom wall of the drainage groove (14). A plurality of penetrating shapes that allow water in the drainage groove (14) to fall below the second header tank (82) into the connecting portion (94) that becomes the bottom wall of the drainage groove (14) in the second header tank (82). Drain holes (not shown) are formed at intervals in the left-right direction so as to be positioned below at least some of the cool storage material containers (19). The drain hole is a long hole whose longitudinal direction faces the longitudinal direction (left and right direction) of the lower headers (92) and (93), and is formed so as to be positioned below at least a part of the regenerator container. At least a part of the lengthwise direction overlaps the cold storage material container as viewed from below.

  The two header tanks (81) and (82) are made using a plurality of appropriate members.

  A plurality of aluminum leeward sides whose upper and lower ends are connected to the leeward upper header (83) and the leeward lower header (92) between the leeward upper header (83) and the leeward lower header (92) The heat exchange tube (4) (first heat exchange tube (4)) is arranged, and the upper and lower ends are located between the windward upper header (84) and the windward lower header (93). ) And a plurality of aluminum upwind heat exchange tubes (4) (second heat exchange tubes (4)) connected to the upwind lower header (93). Although not shown in the drawing, the heat exchange tube (4) has a flat shape, and the width direction is directed to the ventilation direction indicated by the arrow X in FIG. 9 and the longitudinal direction is directed to the up and down direction (the ventilation direction and the ventilation direction). In a direction perpendicular to each other). The leeward tube row (97) (downflow tube group) in which the refrigerant flows from top to bottom by the total heat exchange tube (4) disposed between the leeward upper header (83) and the leeward lower header (92) ) And an upwind tube row (98) in which the refrigerant flows from below to above by a total heat exchange tube (4) disposed between the upwind header (84) and the upwind lower header (93). (Upflow tube group) is configured.

  The entire leeward side upper header (83) becomes the leeward side upper section (first upper section) through which the upper end of the heat exchange tube (4) of the leeward side tube row (97), which is the downflow tube group, communicates. The entirety of the lower header (92) is a leeward lower section (first lower section) through which the lower end portion of the heat exchange tube (4) of the windward tube row (98), which is an upflow tube group, communicates. Further, the entire windward upper header (84) becomes the windward upper section (second lower section) through which the upper end of the heat exchange tube (4) of the windward tube row (98) communicates, and the windward lower header (93 ) Is the windward lower section (second lower section) through which the lower end of the heat exchange tube (4) of the windward tube row (98) communicates.

  The upper end of the heat exchange tube (4) of the leeward side tube row (97) communicates with the lower space (83b) of the leeward upper header (83), and the lower end also communicates with the leeward lower header (84). The upper end of the heat exchange tube (4) of the windward tube row (98) leads to the lower space (84b) of the windward upper header (84), and the lower end is also the upper space (93a of the windward lower header (93). ).

  Although not shown, the number of heat exchange tubes (4) in the leeward tube row (97) is equal to the number of heat exchange tubes (4) in the leeward tube row (98). The heat exchange tube (4) in the leeward tube row (97) and the heat exchange tube (4) in the windward tube row (98) are in the same position in the left-right direction, and two heat exchange tubes ( 4) constitutes a tube set (99), and a gap is formed between the tube sets (99) adjacent in the left-right direction. An aluminum regenerator container is arranged in a part of all the gaps and a plurality of container gaps so as to straddle the two heat exchange tubes (4) constituting each tube set (99). The container is brazed in contact with two heat exchange tubes. In addition, the remaining part of the whole gap and the plurality of fin gaps are made of an aluminum brazing sheet having a brazing filler metal layer on both sides, and the wave crest part extending in the front-rear direction, the wave bottom part extending in the front-rear direction, and the wave crest part and the wave Outer fins consisting of connecting parts that connect the bottom part are arranged so as to straddle the two heat exchange tubes (4) constituting each tube set (99), and the outer fins are connected to both heat exchange tubes (4). It is brazed in contact.

  In the evaporator (1) with the cold storage function described above, the refrigerant flowing in from the refrigerant inlet (89) flows through the following path and flows out from the refrigerant outlet (91). The route includes the upper space (83a) of the leeward upper header (83), the communication hole (87), the lower space (83b) of the leeward upper header (83), the leeward tube row (97), and the leeward lower header. (92), communication part, lower space (93b) on the windward lower header (93), refrigerant passage hole (96), upper space (93a) on the windward lower header (93), windward tube row (98), They are the lower space (84b) of the windward upper header (84), the refrigerant passage hole (88), and the upper space (84a) of the windward upper header (84).

  The evaporator with a cold storage function according to the present invention is suitably used in a refrigeration cycle constituting a car air conditioner for a vehicle that temporarily stops an engine that is a drive source of a compressor when the vehicle is stopped.

(1) (80): Evaporator with cool storage function
(3) (82): 2nd header tank
(4): Heat exchange tube
(5): Downward upper header (first upper header)
(6): Windward upper header (second upper header)
(11): Downward lower header (first lower header)
(12): Upwind lower header (second lower header)
(14): Drainage ditch
(14a): Bottom wall
(17): Tube assembly
(18A): Container gap
(18B): Fin gap
(19): Cold storage container
(19a): Left and right side walls
(21): Outer fin
(23): First downflow tube group
(24): First upflow tube group
(25): Second downflow tube group
(28): Downward upper left section (first section)
(29): Downward upper center section (second section)
(37): Downward lower left section (third section)
(38): Downward lower center section (fourth section)
(34): Upwind upper left section (5th section)
(42): Upwind lower left section (sixth section)
(44): Upper refrigerant passage
(69): Drainage hole
(70): No hole part
(73): Drainage channel
(74): Convex
(83): Downward upper header (first upper section)
(84): Windward upper header (second upper section)
(92): Lower header on the leeward side (first lower section)
(93): Upwind lower header (second lower section)
(94): Connection part
(97): Downward tube row

Claims (7)

The first upper header, the second upper header arranged in parallel in the ventilation direction so as to be parallel to the first upper header, and arranged below the first upper header so as to be parallel to the first upper header A first lower header, a second lower header disposed below the second upper header and in parallel with the second upper header and the first lower header, and a first upper header and a first lower header. A plurality of first heat exchange tubes disposed between and having upper and lower ends connected to the first upper header and the first lower header, and a first heat exchange tube between the second upper header and the second lower header And a plurality of second heat exchange tubes whose upper and lower ends are connected to the second upper header and the second lower header, and a plurality of regenerator containers enclosing the regenerator material. Provided, the first lower header and the second lower header are provided in one header tank. And a plurality of tube sets including the first heat exchange tube and the second heat exchange tube arranged side by side in the ventilation direction are arranged at intervals in the longitudinal direction of all headers, so that they are adjacent to each other in the longitudinal direction of all headers. A plurality of gaps are formed between the matching tube sets, and the cold storage material container is disposed so as to be in contact with the first and second heat exchange tubes in a part of the total gaps and in the plurality of gaps. An evaporator with function,
In the header tank in which the first lower header and the second lower header are provided, drainage grooves that open upward and extend in the longitudinal direction of both lower headers are formed. The drainage hole for dropping the water in the drainage groove below the header tank is formed so as to be positioned below at least a part of the regenerator container, and at least one of the drainage holes below the regenerator container. The evaporator with the cool storage function that the part overlaps with the cool storage material container as seen from below. In the header tank, the first lower header and the second lower header are integrally connected by a connecting portion, a drainage groove is formed by both the lower header and the connecting portion, and the connecting portion is a bottom wall of the drainage groove. The evaporator with a cool storage function according to claim 1. The evaporator with a cool storage function according to claim 1 or 2, wherein the drainage hole is a long hole whose longitudinal direction faces the longitudinal direction of both lower headers. The cool storage material container is flat and is arranged with the longitudinal direction facing the up and down direction and the width direction facing the ventilation direction, and has a constant flow path length in the up and down direction on the outer surfaces of the left and right side walls of the cool storage material container. A plurality of condensate drainage channels are formed, and the condensate drainage channels are formed between two convex portions provided on the left and right side walls of the cold storage material container and bulging outward. The evaporator with a cool storage function as described in any one of them. Between the first upper header and the first lower header, a plurality of first heat exchange tubes, a first downflow tube group in which the refrigerant flows from top to bottom, and a plurality of first heat exchange tubes A plurality of second heat exchange tubes provided between the second upper header and the second lower header, wherein the first upward flow tube group is provided adjacent to the first downward flow tube group. And a second downflow tube group arranged in the ventilation direction with respect to the first downflow tube group is provided, and the upper end of the first downflow tube group is provided in the first upper header. And a second compartment through which the upper end of the first upward flow tube group communicates and the refrigerant flows out toward the first compartment, and the first lower flow tube is provided in the first lower header. A third compartment that communicates with the lower end of the group, and a first upward flow h A fourth section is provided, which communicates with the lower end portion of the groove group and is separated from the third section, and a fifth section is provided in the second upper header, which communicates with the upper end portion of the second downflow tube group. 2 The lower header is provided with a sixth section through which the lower end portion of the second downflow tube group communicates, and an upper refrigerant passage section is provided between the first section and the fifth section so as to pass through both sections. And the sixth compartment are provided with a lower refrigerant passage portion that allows both compartments to pass through, and the regenerator container disposed in the portion where the first downflow tube group and the second downflow tube group are provided. The evaporator with a cool storage function according to any one of claims 1 to 4, wherein a holeless portion in which a drainage hole is not formed is present in a lower portion of the continuous header tank, which is a bottom wall of the drainage groove. . Between the first upper header and the first lower header, there is provided a first heat exchange tube and a downflow tube group in which the refrigerant flows from the top to the bottom, and between the second upper header and the second lower header. Further, an upflow tube group that includes the second heat exchange tube and flows from the bottom to the top and that is aligned in the ventilation direction with respect to the downflow tube group is provided, and the upper end of the downflow tube group is provided in the first upper header. A first upper section that communicates with the first lower section, a first lower section that communicates with the lower end of the downflow tube group is provided in the first lower header, and a second upper section that communicates with the upper end of the upflow tube group. The upper section is provided, the lower end of the upflow tube group is connected to the second lower header, and the second lower section is provided which is communicated with the first lower section. An evaporator with a cold storage function described in Crab. The first heat exchange tube and the second heat exchange tube have a flat shape, and are arranged with the longitudinal direction directed in the vertical direction and the width direction in the ventilation direction. The evaporator with a cool storage function according to any one of claims 1 to 6, wherein the fin is disposed so as to contact the first heat exchange tube and the second heat exchange tube.

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