JP5783874B2 - Evaporator with cool storage function - Google Patents

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 this specification and claims, the top, bottom, left and right in FIG.

  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 this type of evaporator with a cold storage function, a plurality of flat refrigerant flow pipes whose longitudinal direction faces the up-down direction and whose width direction faces the ventilation direction are arranged in parallel at intervals, and adjacent refrigerants Ventilation gaps are formed between the circulation pipes, and a cool storage material container in which a cool storage material is sealed in some of the ventilation gaps is disposed, and outer fins are disposed in the remaining ventilation gaps. The fins are arranged in the ventilation gap adjacent to the ventilation gap where the cool storage material container is arranged, and the left and right side walls of the cool storage material container are along the refrigerant circulation pipes on both sides forming the ventilation gap where the cool storage material container is arranged. The inner fins are arranged in the cool storage material container, and the left and right side walls of the cool storage material container are formed so as to be dotted with a plurality of bulge portions bulging outward and the bulge top wall of the bulge portion Is in contact with the refrigerant distribution pipe. The bulging portion on one side wall and the bulging portion on the other side wall of each cool storage material container have the same shape and the same size, and are provided at the same position when viewed from either the left or right side. An evaporator with a cold storage function has been proposed in which inner fins are joined to portions of the left and right side walls of the cold storage material container where the bulging portions are not formed (see Patent Document 1).

  According to the evaporator with a cool storage function described in Patent Document 1, during normal cooling when the compressor is operating, the cold heat of the coolant flowing in the coolant circulation pipe is passed through the bulging top wall of the bulging portion of the cool storage material container. It is transmitted to the whole, is transmitted from the contact portion to the inner fin on the side wall through the inner fin to the cold storage material in the cold storage material container, and cold energy is stored in the cold storage material. On the other hand, when the compressor stops, the cold heat stored in the regenerator material in the regenerator material container is transmitted to the both side walls of the regenerator material container through the contact portion from the inner fin to the inner fin, and then the bulging part Is transmitted to the refrigerant circulation pipe through the bulging top wall, and is transmitted to the outer fin disposed in the ventilation gap on both sides of the ventilation gap where the cool storage material container is disposed through the refrigerant circulation pipe, and from the outer fin to the ventilation gap. It is designed to be cooled by the air flowing through.

However, in the evaporator with a cool storage function described in Patent Document 1, as shown in FIG. 7, the bulging portion (61) of one side wall (60a) and the other side wall (60a) of each cool storage material container (60). The bulging portion (61) has the same shape and the same size, and only the portion where the bulging portion (61) is not formed on the left and right side walls (60a) of the cold storage container (60) is the inner fin ( 62) and the bulging top wall of the bulging portion (61) is not in contact with the inner fin (62), so the left and right side walls when the cold storage container (60) is viewed from either the left or right side ( 60a) and the refrigerant distribution pipe (63) overlap, the ratio of the contact area to the inner fin (62) on the left and right side walls (60a) of the cold storage container (60) with respect to the entire area of the overlapped part is considerable. It is getting smaller. Therefore, in both cases of cold storage and cooling, the heat transfer efficiency between the left and right side walls (60a) of the cold storage container (60) using the inner fins (62) and the cold storage material is not sufficient. There is a problem that the cold storage performance and the cooling performance are inferior.

JP 2011-12947 A

  The objective of this invention is providing the evaporator with a cool storage function which solved the said problem and improved the cool storage performance and the cool-down performance.

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

1) A plurality of flat refrigerant flow pipes arranged in parallel at intervals in the state where the longitudinal direction faces the vertical direction and the width direction faces the ventilation direction, and the longitudinal direction faces the vertical direction and the width direction Are arranged in a state of facing the ventilation direction and have a plurality of cool storage material containers in which the cool storage material is enclosed, and at least one side wall of the cool storage material container extends along the coolant flow pipe to the coolant flow pipe In an evaporator with a cold storage function that is brought into thermal contact, an inner fin is arranged in the cold storage material container, and the cold storage material in the cold storage material container is cooled by the cold heat of the refrigerant flowing in the refrigerant flow pipe ,
The side wall of the cool storage material container along the refrigerant flow pipe is provided with a plurality of convex portions that protrude outward and the protruding end portions are in contact with the refrigerant flow pipe. A pair of outwardly projecting walls integrally formed on the side wall of the outer wall and a connecting wall that connects the tips of the two outwardly projecting walls with each other, and a space between the two outwardly projecting walls of each convex portion is filled with a brazing material. Evaporator with cool storage function.

  2) Ventilation gaps are formed between adjacent refrigerant flow pipes, cool storage material containers are arranged in some of the ventilation gaps, and the left and right side walls of the cool storage material containers are arranged with cool storage material containers. The evaporator with a cool storage function according to the above 1), which is provided along the refrigerant flow pipes on both sides forming a ventilation gap and has convex portions on both side walls of the cool storage material container.

  3) A regenerator container is disposed only on one side of each refrigerant distribution pipe, and one side wall of the regenerator container is provided along the refrigerant distribution pipe and a convex portion is provided on the side wall, and the refrigerant distribution pipe and the regenerator container The evaporator with a cool storage function according to 1), wherein the combination body is arranged with a space in a direction perpendicular to the width direction of the refrigerant flow pipe, and a gap is provided between the adjacent combination bodies.

  4) The evaporator with a cool storage function according to any one of 1) to 3) above, wherein a distance between both outward projecting walls of each convex portion is 0.2 mm or less.

  5) The dimension in the length direction of each convex part is larger than the dimension in the width direction, and the width of the convex part is more than twice the thickness of the side wall provided with the convex part. The evaporator with a cool storage function according to any one of 1) to 4).

  6) The evaporator with a cool storage function according to any one of 1) to 5) above, wherein the protruding height of the convex portion from the outer surface of the side wall of the cool storage material container is 0.5 mm or more.

  7) In the overlapping part where the side wall and the refrigerant circulation pipe overlap when the cold storage material container is viewed from either the left or right side, the contact area between the convex part and the refrigerant circulation pipe is 20% or more of the area of the overlapping part. The evaporator with a cold storage function according to any one of 1) to 6) above.

  8) The evaporator with a cool storage function according to any one of the above 1) to 7), wherein the cool storage material container is formed by brazing metal plates made of brazing sheets having brazing material layers on both sides. .

  According to the evaporator with a cold storage function of the above 1) to 8), the side wall along the refrigerant flow pipe in the cold storage material container is dotted with a plurality of convex portions that protrude outward and the protruding end portions contact the refrigerant flow pipe. Each convex part is composed of a pair of outwardly projecting walls integrally formed on the side wall of the cold storage material container and a connecting wall that connects the tips of both outwardly projecting walls. Since the space between the two outward projecting walls is filled with the brazing material, in the overlapping portion where the side wall along the refrigerant flow pipe and the refrigerant flow pipe overlap in the cold storage material container when the cold storage material container is viewed from either the left or right side The contact area between the side wall and the inner fin is larger than that of the evaporator with a cold storage function described in Patent Document 1. Therefore, compared with the evaporator with a cool storage function described in Patent Document 1, the heat transfer performance through the inner fin between the side wall of the cool storage material container and the cool storage material in both cases of cold storage and cooling. Compared with the evaporator with a cool storage function described in Patent Document 1, the cool storage performance and the cool discharge performance are improved.

  Moreover, a clearance gap is formed between a refrigerant | coolant distribution pipe and a cool storage material container by presence of a convex part, and a wind flows through the said clearance gap. Therefore, an increase in ventilation resistance can be suppressed. Furthermore, the condensed water generated on the outer surface of the refrigerant circulation pipe can be drained through a gap formed between the refrigerant circulation pipe and the cold storage material container due to the presence of the convex portion.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway perspective view showing an overall configuration of an evaporator with a cold storage function of the present invention. It is an AA line expanded sectional view of FIG. FIG. 3 is a sectional view taken along line B-B in FIG. 2. It is a right view of the cool storage material container of the evaporator with a cool storage function of FIG. It is a disassembled perspective view of the cool storage material container of the evaporator with a cool storage function of FIG. It is sectional drawing equivalent to FIG. 2 which shows other embodiment of the evaporator with a cool storage function of this invention. It is a figure equivalent to FIG. 3 which shows the cool storage material container of the evaporator with the conventional cool storage function.

  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 the drawing) 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.

  FIG. 1 shows the entire structure of an evaporator with a cold storage function according to the present invention, and FIGS.

  In FIG. 1, an evaporator with a cold storage function (1) includes an aluminum first header tank (2) and an aluminum second header tank (3) extending in the horizontal direction and spaced apart in the vertical direction, and both headers. And a heat exchange core part (4) provided between the tanks (2) and (3).

  The first header tank (2) is located on the leeward upper header part (5) located on the front side (downstream side in the ventilation direction) and on the leeward side upper header part (5) located on the rear side (upstream side in the ventilation direction). And an integrated upwind header section (6). A refrigerant inlet (7) is provided at the right end of the leeward upper header (5), and a refrigerant outlet (8) is provided at the right end of the leeward upper header (6). The second header tank (3) includes a leeward lower header portion (9) located on the front side and an upwind lower header portion (11) located on the rear side and integrated with the leeward lower header portion (9). And. The leeward lower header portion (9) and the leeward lower header portion (11) of the second header tank (3) are joined across the right end portions of the lower header portions (9) and (11), and The inside is communicated via a communication member (12) that forms a passage.

  As shown in FIGS. 1 and 2, the heat exchange core (4) has a flat refrigerant made of a plurality of extruded aluminum shapes whose longitudinal direction faces the vertical direction and whose width direction faces the ventilation direction (front-rear direction). The flow pipes (13) are arranged in parallel at intervals in the left-right direction. Here, a plurality of sets (14) consisting of two refrigerant flow pipes (13) arranged at intervals in the front-rear direction are arranged at intervals in the left-right direction, and the front and rear refrigerant flow pipes (13) A ventilation gap (15) is formed between adjacent members of the set (14). An upper end portion of the front refrigerant flow pipe (13) is connected to the leeward upper header portion (5), and a lower end portion thereof is connected to the leeward lower header portion (9). Further, the upper end portion of the rear refrigerant flow pipe (13) is connected to the windward upper header portion (6), and the lower end portion thereof is connected to the windward lower header portion (11).

  A regenerator material (not shown) is enclosed inside a part of the plurality of ventilation gaps (15) and the non-adjacent ventilation gaps (15) of the total ventilation gap (15) in the heat exchange core (4). An aluminum flat cold storage container (16) is disposed so as to straddle the front and rear refrigerant flow pipes (13) with the longitudinal direction facing the vertical direction and the width direction facing the front and rear direction. In addition, the remaining ventilation gap (15) is made of an aluminum brazing sheet having a brazing filler metal layer on both sides, and has a wave crest extending in the front-rear direction, a wave bottom extending in the front-rear direction, and a connection connecting the wave crest and the wave bottom. The corrugated outer fins (17) made up of two parts are arranged so as to straddle both the front and rear refrigerant flow pipes (13) to form a pair (14) on both the left and right sides forming a ventilation gap (15). Outer fins (17) are respectively disposed in the ventilation gaps (15) on both sides of the ventilation gap (15) where the cold storage material container (16) is arranged, which are brazed to the pipe (13). In addition, outer fins (17) made of an aluminum brazing sheet having a brazing filler metal layer on both sides are also arranged outside the set (14) of the refrigerant flow pipes (13) at the left and right ends, and the front and rear refrigerant flow pipes (13) are arranged. An aluminum side plate (18) is disposed outside the outer fins (17) at both the left and right ends and brazed to the outer fins (17). A ventilation gap is also formed between the outer fin (17) and the side plate (18) at the left and right ends.

  As shown in FIGS. 2 to 4, the regenerator container (16) is located behind the front edge of the front refrigerant flow pipe (13) and has two refrigerant flow pipes (13 ) Brazed to the main body (21) and the front edge (leeward edge) of the main body (21) and forward (outer in the ventilation direction) than the front edge of the front refrigerant flow pipe (13) And an outward projecting portion (22) provided so as to project, and the left and right surfaces of the main body portion (21) are respectively aligned with one surface of the left and right refrigerant circulation pipes (13). In the regenerator container (16), a corrugated aluminum inner fin (23) comprising a wave crest extending in the front-rear direction, a wave bottom extending in the front-rear direction, and a connecting portion connecting the wave crest and the wave bottom is formed as a main body. The wave bottom and wave crest are brazed to the left and right side walls (21a) of the body (21) of the regenerator container (16). ing. As the regenerator material filled in the regenerator material container (16), a paraffin-based latent heat regenerator material whose freezing point is adjusted to about 5 to 10 ° C is used. Specifically, pentadecane, tetradecane, or the like is used.

  A plurality of convex portions brazed to the left and right side walls (21a) of the main body portion (21) of the cold storage material container (16) in a state of protruding outward and the protruding end portions being in contact with the refrigerant flow pipe (13). (24) are provided so as to be scattered. The length in the length direction of the convex part (24) is larger than the dimension in the width direction, and is inclined downward from the windward side (front side) toward the leeward side (rear side). The leeward side portion and the leeward side portion of the left and right side walls (21a) of the main body portion (21) of the cool storage material container (16) are respectively provided with an interval in the vertical direction. Each convex part (24) is formed by deforming the left and right side walls (21a) of the main body part (21) so as to protrude outward, and a pair of integrally formed on each side wall (21a). It consists of an outward projecting wall (24a) and a connecting wall (24b) that connects the tips of both outward projecting walls (24a). It is preferable that the space | interval between the both outward protrusion walls (24a) of each convex part (24) is 0.2 mm or less, and the space | interval between both outward protrusion walls (24a) is satisfy | filled with the brazing material which is not shown in figure. Moreover, the width of each convex part (24) is more than twice the thickness of the side wall (21a), and the protruding height of the convex part (24) from the outer surface of the side wall (21a) is 0.5 mm or more. preferable. Further, in the overlapping portion where the left and right side walls (21a) and each refrigerant flow pipe (13) overlap when the cold storage material container (16) is viewed from either the left or right side, the convex part (24) and each refrigerant flow pipe The contact area with (13) is preferably 20% or more of the area of the overlapping portion.

  As shown in FIG. 5, the regenerator container (16) is formed by pressing aluminum brazing sheets having a brazing filler metal layer on both sides, and the two peripheral parts are brazed to each other. It consists of a substantially vertical rectangular aluminum plate (25). A portion of both aluminum plates (25) forming the main body portion (21), that is, most of the portion excluding the front side portion is provided with a first bulging portion (26) bulging outward in the left-right direction. The portion that forms the side bulge portion (22), that is, the front side portion, is continuous with the front side of the first bulge portion (26) and bulges outward in the left-right direction and bulges more than the first bulge portion (26). The 2nd bulging part (27) with high protrusion height is provided over the full length of the up-down direction. A convex part (24) is formed on the bulging top wall of the first bulging part (26).

  Then, the two aluminum plates (25) are combined so that the openings of the first and second bulge portions (26) and (27) face each other with the inner fin (23) interposed therebetween, and this state will be maintained. The cold storage container (16) is formed by attaching. Here, the main body part (21) is formed by the first bulge part (26) of both aluminum plates (25), and the outwardly projecting part (22) is formed by the second bulge part (27).

  The outer fin (17) is located behind the front edge of the front heat exchange pipe (13), and is finned to the heat exchange pipe (13) before and after each pair (14) by the fin body (28) And an outwardly extending portion (29) provided to extend forward of the front side edge of the front heat exchange tube (13) while continuing to the front side edge of the fin body portion (28). Then, the outwardly projecting portion (29) of the outer fin (17) arranged in the ventilation gap (15) adjacent to the ventilation gap (15) where the cold storage material container (16) is arranged, the cold storage material container (16) Are brazed to the left and right side surfaces of the outwardly projecting portion (22). An aluminum spacer (31) is disposed between the outwardly projecting portions (29) of the adjacent outer fins (17), and is brazed to the outwardly projecting portion (29).

  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 is stopped. When the compressor is operating, the low-pressure gas-liquid mixed-phase two-phase refrigerant compressed by the compressor and passed through the condenser and the expansion valve passes through the refrigerant inlet (7) and has an evaporator with a cold storage function ( It enters into the leeward upper header part (5) of 1) and flows out from the refrigerant outlet (8) of the leeward upper header part (6) through the entire refrigerant flow pipe (13). While the refrigerant flows in the refrigerant flow pipe (13), heat exchange is performed with the air passing through the ventilation gap (15), and the refrigerant flows out in a gas phase.

  At this time, the cold heat of the refrigerant flowing in the refrigerant flow pipe (13) is provided on both side walls (21a) of the main body (21) of the cool storage material container (16) and brazed to the refrigerant flow pipe (13). It is transmitted from the convex portion (24) passing through the both side walls (21a) to the inner fin (23), further transmitted to the cool storage material in the cool storage material container (16), and cold energy is stored in the cool storage material.

  When the compressor stops, the cold energy stored in the cool storage material in the cool storage material container (16) passes through the inner fins (23) and the both side walls (21a of the main body (21) of the cool storage material container (16). ), Further through the convex portion (24) to the refrigerant flow pipe (13), and further passed through the refrigerant flow pipe (13) and brazed to the refrigerant flow pipe (13). It is transmitted to. Then, the air is transmitted to the air passing through the ventilation gap (15) adjacent to the ventilation gap (15) where the cool storage material container (16) is disposed via the outer fin (17). Therefore, even if the temperature of the wind that has passed through the evaporator (1) rises, the wind is cooled, so that a rapid decrease in the cooling capacity is prevented.

  In the above embodiment, the inner fin (23) disposed in the cool storage material container (16) has a corrugated shape, but instead, a wave crest extending in the front-rear direction (ventilation direction), a wave bottom extending in the front-rear direction Also, offset inner fins formed by arranging a plurality of corrugated strips having a coupling portion for coupling the wave crest portion and the wave bottom portion in the ventilation direction and integrally connected to each other may be used. . In this case, the wave crest portion and the wave bottom portion of the strip of the inner fin are brazed to the left and right side walls (21a) of the main body portion (21) of the cold storage material container (16).

  FIG. 6 shows another embodiment of an evaporator with a cold storage function according to the present invention.

  In FIG. 6, the two refrigerant flow pipes (13) of each set (14) are arranged on one side of each set (14) consisting of two refrigerant flow pipes (13) at the front and back in the heat exchange core (4), here the left side. The aluminum flat cold storage container (40) with the cold storage material (not shown) enclosed inside is placed with the longitudinal direction facing the vertical direction and the width direction facing the front-rear direction. In addition, at least a part of the right side of the cool storage material container (40) extends along the left side of the right refrigerant circulation pipe (13).

  The cool storage material container (40) is located behind the front edge of the front refrigerant flow pipe (13) and is brazed to the refrigerant flow pipe (13) before and after each set (14). And an outwardly extending part (42) provided to extend forward of the front refrigerant circulation pipe (13) and to the front edge of the main body part (41), and the main body part (41) The right side of the right side is along the left side of the right refrigerant circulation pipe (13).

  A plurality of protrusions (24) projecting outward and brazed in a state where the projecting ends are in contact with the refrigerant flow pipe (13) on the right side wall (41a) of the main body (41) of the cool storage material container (40). ) Are provided. The structure of the convex part (24) is the same as the evaporator (1) with a cool storage function of 1st Embodiment shown in FIGS.

  The outwardly projecting portion (42) of the cold storage material container (40) has the vertical dimension equal to the vertical dimension of the main body (41) and the horizontal dimension is the horizontal dimension of the main body (41). It is larger than the main body portion (41) and bulges outward in the left-right direction. The lateral dimension of the outward projecting part (42) is the same as the lateral dimension of the main body part (41) of the cold storage material container (40) to the pipe height which is the lateral dimension of the refrigerant flow pipe (13). The height is equal to the height of the protrusion (24) plus the protruding height.

  Inside the cool storage material container (40), aluminum inner fins (43) extending from the rear end of the main body (41) to the front end of the outwardly projecting portion (42) are arranged over substantially the entire vertical direction. Yes. The inner fin (43) has a corrugated shape including a wave crest extending in the front-rear direction, a wave bottom extending in the front-rear direction, and a connecting portion that connects the wave crest and the wave bottom. The fin height of the inner fin (43) is the same as the whole, the inner surface of the left side wall of the main body part (41) and the outward projecting part (42) of the cold storage material container (40), and the right side wall (41a) of the main body part (41). ) It is brazed to the inner surface.

  The cool storage material container (40) is formed by pressing aluminum brazing sheets having a brazing filler metal layer on both sides, and the peripheral edges of two substantially vertical rectangular aluminum plates whose peripheral portions are brazed to each other. It consists of two substantially vertical rectangular aluminum plates (44) and (45) whose parts are brazed together. A convex portion (24) is formed on a portion of the right aluminum plate (44) constituting the cool storage material container (40) where the main body portion (41) is formed, that is, most of the portion excluding the front side portion. In addition, a bulge portion (46) that bulges to the right is provided over the entire length in the vertical direction on the portion of the right aluminum plate (44) that forms the outward projection (42), i.e., the front portion. Yes.

  A portion of the left aluminum plate (45) constituting the cold storage material container (40) forming the main body portion (41), that is, most of the portion excluding the front side portion, has a first bulging portion bulging leftward ( 47) is provided, and the portion that also forms the outwardly projecting portion (42), that is, the front portion, is connected to the front side of the first bulging portion (47) and bulges to the right, and the first bulging portion A second bulging portion (48) having the same bulging height as (47) is provided over the entire length in the vertical direction.

  The two aluminum plates (44) and (45) are sandwiched between the inner fins (43), and the opening of the first bulging portion (47) of the left side aluminum plate (45) is connected to the right side aluminum plate (44). The parts that form the main body part (41) are closed, and the openings of the bulged parts (46) and (48) of the aluminum plates (44) and (45) are combined so that they face each other and brazed in this state. Thus, the cold storage material container (40) is formed. Here, the main body portion (41) is formed by the rear portion of the right aluminum plate (44) and the first bulge portion (47) of the left aluminum plate (45), and the bulge portion of the right aluminum plate (45) ( An outwardly projecting portion (42) is formed by 46) and the second bulging portion (48) of the left aluminum plate (45).

  In the heat exchange core part (4), each pair (14) composed of two refrigerant flow pipes (13) arranged in the front-rear direction and the two refrigerant flow pipes (13) of each set (14) are arranged straddling. The cool storage material container (40) constitutes a plurality of combinations (49). The combination body (49) is arranged with an interval in the left-right direction, and between the adjacent combination bodies (49) becomes a ventilation gap (15), and an aluminum outer fin is provided in the ventilation gap (15). (17) is arranged and brazed to the refrigerant flow pipe (13) and the cool storage material container (40). The fin body (28) of the outer fin (17) located on the right side of the combination (49) consisting of the refrigerant flow pipe (13) and the cold storage container (40) of each set (14) The outer projecting portion (29) is brazed to the outer projecting portion (42) of the cold storage material container (40). Further, the fin body portion (28) of the outer fin (17) located on the left side of the combined body (49) composed of the refrigerant flow pipe (13) and the cold storage material container (40) of each set (14) is a cold storage material container ( 40) is brazed to the body part (41), and the outwardly projecting part (29) is also brazed to the outwardly projecting part (42) of the cold storage material container (40).

  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): Evaporator with cool storage function
(13): Refrigerant distribution pipe
(15): Ventilation gap
(16) (40): Cold storage container
(21) (41): Body
(21a) (41a): Side wall
(23) (43): Inner fin
(24): Convex part
(24a): outward protruding wall
(24b): Connecting wall
(25): Aluminum plate (metal plate)

Claims (8)

A plurality of flat refrigerant flow pipes arranged in parallel at intervals in a state where the longitudinal direction faces the vertical direction and the width direction faces the ventilation direction, and the longitudinal direction faces the vertical direction and the width direction ventilates. A plurality of regenerator containers that are arranged in a direction and in which a regenerator material is enclosed, and at least one side wall of the regenerator container is disposed along the refrigerant flow pipe and is thermally connected to the refrigerant flow pipe. In the evaporator with a cold storage function, the inner fin is disposed in the cold storage material container, and the cold storage material in the cold storage material container is cooled by the cold heat of the refrigerant flowing in the refrigerant flow pipe.
The side wall of the cool storage material container along the refrigerant flow pipe is provided with a plurality of convex portions that protrude outward and the protruding end portions are in contact with the refrigerant flow pipe. A pair of outwardly projecting walls integrally formed on the side wall of the outer wall and a connecting wall that connects the tips of the two outwardly projecting walls with each other, and a space between the two outwardly projecting walls of each convex portion is filled with a brazing material. Evaporator with cool storage function. Ventilation gaps are formed between adjacent refrigerant flow pipes, cool storage material containers are arranged in some of the ventilation gaps, and the left and right side walls of the cool storage material containers are provided with cool storage material containers. The evaporator with a cool storage function according to claim 1, wherein the evaporator is provided along the refrigerant flow pipes on both sides forming a gap, and convex portions are provided on both side walls of the cool storage material container. A regenerator container is disposed only on one side of each refrigerant circulation pipe, and one side wall of the regenerator material container is provided along the refrigerant distribution pipe and a convex portion is provided on the side wall, and includes a refrigerant circulation pipe and a cold storage material container. The evaporator with a cool storage function according to claim 1, wherein the combination body is disposed with a space in a direction perpendicular to the width direction of the refrigerant flow pipe, and a gap is provided between the adjacent combination bodies. The evaporator with a cool storage function according to any one of claims 1 to 3, wherein an interval between both outward projecting walls of each convex portion is 0.2 mm or less. 2. The dimension in the length direction of each protrusion is larger than the dimension in the width direction, and the width of the protrusion is at least twice the thickness of the side wall provided with the protrusion. Evaporator with a cool storage function in any one of -4. The evaporator with a cold storage function according to any one of claims 1 to 5, wherein a protruding height of the convex portion from the outer surface of the side wall of the cold storage material container is 0.5 mm or more. The contact area between the convex portion and the refrigerant circulation pipe is 20% or more of the area of the overlapping part in the overlapping part where the side wall and the refrigerant circulation pipe overlap when the cold storage material container is viewed from either the left or right side. The evaporator with a cool storage function in any one of 1-6. The evaporator with a cool storage function according to any one of claims 1 to 7, wherein the cool storage material container is formed by brazing metal plates made of brazing sheets having brazing material layers on both sides.

Images