JP2017155969A - Evaporator with cold storage function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an evaporator including a cold storage function capable of restricting a deformation of a peripheral wall of refrigerant flow pipe or a side wall of heat storage material filling part of the heat storage container causes by frozen of condensing water.SOLUTION: Openings formed at both side walls 27 of a heat storage filling part 26 of heat storage container of an evaporator including heat storage function facing to a refrigerant flow pipe 13 of condensate water discharging groove 28 are closed by the refrigerant flow pipe 13. Two or more partition walls 16 of the refrigerant flow pipe 13 are present in a range of ventilation direction of a closed portion 31. A connecting part 33c of a corrugated band plate 33 acting as a heat transfer part of an inner fin 32 is connected to only a portion becoming a bottom wall of the closed portion 31 of the condensate discharging groove 28 at any one of side walls 27 of the heat storage material filling part 26 of the heat storage container 18 and spaced apart from the other side wall 27. A relation among a wall thickness of a peripheral wall of the refrigerant flow pipe 13: t1 mm, a wall thickness of a portion becoming a bottom wall of the condensate discharging groove 28 of a side wall 27 of the heat storage material container 18: t2 mm and a depth of the condensate discharging groove 28: Hmm is defined as t1<t2, 2*t1>t2, H>t1+t2.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an evaporator with a cold storage function.

  In this specification and claims, the top and bottom, left and right (up and down, left and right in FIG. 1) viewed from the downstream side in the ventilation direction indicated by arrow X in FIGS.

  For example, for the purpose of protecting the environment and improving the fuel consumption of an automobile, an automobile that automatically stops the engine when the vehicle stops, such as waiting for a signal, has been proposed.

  In the car air conditioner of the automobile, it is considered that 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 passenger compartment. Yes.

  As an evaporator with this kind of cold storage function, the applicant is first provided with a plurality of flat refrigerant flow pipes having a longitudinal direction in the vertical direction and a width direction in the ventilation direction, and a cold storage material enclosing portion. It has a heat exchange core part having a cold storage material container in which the cold storage material is enclosed in the cold storage material enclosure part, and in the heat exchange core part, a pipe assembly composed of two refrigerant flow pipes arranged in the ventilation direction is spaced in the left-right direction. Are arranged so that a gap is formed between adjacent tube sets, and the regenerator container is arranged so as to be in contact with the refrigerant circulation pipe in a part of the whole gap and in the plurality of gaps. The outer fin is disposed in the remaining gap of the entire gap so as to contact the refrigerant flow pipe, and the gap in which the outer fin is disposed serves as a ventilation gap, and is provided in the cool storage material enclosure portion of the cool storage material container. An inner fin having a wall-like portion located on a vertical plane extending in the left-right direction is arranged inside a portion located within the range of the ventilation direction of the heat exchange core portion, and heat in the cool storage material enclosure portion of the cool storage material container A plurality of condensate drainage grooves having a constant flow path length in the vertical direction are formed at intervals in the ventilation direction on the outer surfaces of the left and right side walls of the portion located within the range of the exchange core in the ventilation direction. Water drainage grooves are provided on the left and right side walls of the cool storage material enclosure of the cool storage material container at intervals in the ventilation direction to bulge outward, and at least a part of the bulging end is joined to the refrigerant flow pipe Proposes an evaporator with a cold storage function that is formed between two drain groove convex parts and at least a part of the total length of the opening facing the refrigerant flow pipe in each condensed water drain groove is closed by the refrigerant flow pipe (See Patent Document 1).

  According to the evaporator with the cold storage function described in Patent Document 1, during normal cooling when the compressor is operating, the cold heat of the refrigerant flowing in the refrigerant flow pipe is stored in the cold storage material container through the drain groove convex portion. When the compressor stops, the cold heat stored in the cool storage material in the cool storage material container is placed in the ventilation gap via the drain groove convex part and the refrigerant flow pipe. When the engine stops and the compressor stops, the cooler stored in the evaporator is used when the engine stops and the compressor stops. The interior of the vehicle can be cooled, and a sudden decrease in cooling capacity when the engine is stopped is suppressed.

  By the way, in the evaporator with a cool storage function described in Patent Document 1, referring to FIG. 4 of Patent Document 1, the thickness of the peripheral wall of the refrigerant flow pipe is t1 mm, and the condensate drainage groove on the side wall of the cool storage material enclosure of the cool storage material container When the thickness of the bottom wall portion is t2 mm and the depth of the condensed water drainage groove is Hmm, the relationship of t1 <t2, 2 · t1 = t2, H = t2 is satisfied. In this case, depending on the conditions, when the condensed water that is generated on the outer surface of the cold storage material container and enters the condensed water drainage groove when the compressor is operated freezes and the volume expands, the refrigerant flow pipe side in each condensed water drainage groove is Relatively large force is applied to the peripheral wall of the refrigerant distribution pipe and the bottom wall of the condensate drainage groove on the side wall of the cold storage material enclosure of the cold storage container in the closed portion where the facing opening is blocked by the refrigerant distribution pipe. May cause these parts to be deformed.

JP 2014-126307 A

  In view of the above circumstances, the present invention provides an evaporator with a cold storage function capable of suppressing deformation of a peripheral wall of a refrigerant flow pipe and a side wall of a cold storage material enclosure portion of a cold storage material container caused by freezing of condensed water in a condensed water drain. It is to provide.

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

1) A regenerator container in which a plurality of flat refrigerant flow pipes whose longitudinal direction is directed in the vertical direction and the width direction is directed in the ventilation direction, and a regenerator material enclosing part are provided and the regenerator material is enclosed in the regenerator material enclosing part A plurality of refrigerant flow pipes are arranged at intervals in the left-right direction in the heat exchange core part to form a gap between adjacent refrigerant flow pipes, The regenerator container is arranged in a part of the entire gap and in a plurality of gaps so as to be in contact with the refrigerant flow pipe, and a plurality of flow paths arranged in the ventilation direction are formed in the refrigerant flow pipe through the partition wall. Heat transfer between the side wall of the regenerator material enclosure and the regenerator material in the regenerator material enclosure within the portion of the regenerator material enclosure of the regenerator material container located within the range of the ventilation direction of the heat exchange core part. Inner fin with heat transfer section A plurality of condensate drainage grooves having a fixed channel length in the vertical direction are formed on the outer surfaces of the left and right side walls of the heat exchange core portion of the cool storage material enclosure of the cool storage material container. Each condensate drainage groove is formed at intervals in the ventilation direction, and the left and right side walls of the cool storage material enclosure of the cool storage material container are spaced apart in the ventilation direction to bulge outward, and the bulge end Is formed between two drain groove convex portions joined to the refrigerant flow pipe, and at least a portion of the total length of the opening facing the refrigerant flow pipe side in each condensed water drain groove is the refrigerant flow pipe. An evaporator with a cold storage function blocked by
In the closed part where the opening facing the refrigerant flow pipe side in the condensed water drainage groove is closed by the refrigerant flow pipe, there are two or more partition walls of the refrigerant flow pipe in the range of the ventilation direction of the closed part, Further, in the closed portion, the heat transfer portion of the inner fin is a bottom wall of the closed portion of the condensed water drainage groove on either one of the left and right side walls of the cool storage material enclosure of the cool storage material container And is separated from the other side wall,
When the wall thickness of the peripheral wall of the refrigerant flow pipe is t1 mm, the thickness of the bottom wall of the condensate drainage groove on the side wall of the cool storage material enclosure of the cool storage material container is t2 mm, and the depth of the condensate drainage groove is Hmm , T1 <t2, 2 · t1> t2, H> t1 + t2, an evaporator with a cold storage function.

  2) Although the condensate drainage groove and drainage groove convex part on one side wall of the cool storage material enclosure of the cool storage material container partially overlap with the condensate drainage groove and drainage groove convex part on the other side wall. The evaporator with a cold storage function as described in 1) above, which is shifted in the ventilation direction in the same horizontal plane so as not to overlap all over.

  According to the evaporator with the cold storage function of 1) and 2) above, in the closed portion where the opening facing the refrigerant flow pipe side in the condensed water drain groove is closed by the refrigerant flow pipe, the range of the ventilation direction of the closed portion There are two or more partition walls of the refrigerant flow pipe inside, and in the closed portion, the heat transfer part of the inner fin is either one of the left and right side walls of the cool storage material enclosure part of the cool storage material container Is connected to only the bottom wall of the closed portion of the condensate drainage groove and is separated from the other side wall, the wall thickness of the peripheral wall of the refrigerant flow pipe is t1 mm, and the regenerator material is enclosed in the regenerator container When the thickness of the bottom wall of the condensate drainage groove on the side wall of the part is t2 mm and the depth of the condensate drainage groove is Hmm, the relationship of t1 <t2, 2 · t1> t2, and H> t1 + t2 is satisfied. Because it is cold storage material On the outer surface of the container, the same amount of condensed water as in the evaporator with a cold storage function described in Patent Document 1 is generated, and the condensed water enters the condensed water drainage groove and freezes at the closed portion, and the volume expands. However, the force acting on the peripheral wall of the refrigerant distribution pipe and the bottom wall of the condensed water drainage groove on the side wall of the cool storage material enclosure of the cool storage material container is smaller than that of the evaporator with the cool storage function described in Patent Document 1. . Therefore, the deformation | transformation of the part used as the bottom wall of the condensed water drainage groove in the surrounding wall of a refrigerant | coolant distribution pipe and the side wall of the cool storage material enclosure part of a cool storage material container is suppressed. In addition, in the closed part where the opening facing the refrigerant flow pipe side in the condensate drainage groove is blocked by the refrigerant flow pipe, there are two or more partition walls of the refrigerant flow pipe within the range of the ventilation direction of the closed part Further, in the closed portion, the heat transfer portion of the inner fin is a bottom wall of the closed portion of the condensed water drainage groove on either one of the left and right side walls of the cool storage material enclosure of the cool storage material container. And is separated from the other side wall by the force acting on the bottom wall of the condensate drainage groove on the side wall of the cool storage material enclosure of the cool storage material container. As a result, the force acting on the peripheral wall of the refrigerant flow pipe is reduced, and the deformation of the peripheral wall of the refrigerant flow pipe is effectively suppressed.

1 is a partially cutaway perspective view showing an overall configuration of an evaporator with a cold storage function according to the present invention. It is a left view which shows the cool storage material container used for the evaporator with a cool storage function of FIG. It is an AA line expanded sectional view of FIG. It is a principal part enlarged view of FIG.

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

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

  FIG. 1 shows the overall configuration 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) is composed of an aluminum upper header tank (2) and an aluminum upper header tank (2) arranged in the vertical direction with the longitudinal direction facing the left and right direction and the width direction facing the ventilation direction. An aluminum lower header tank (3) and a heat exchange core portion (4) provided between the header tanks (2) and (3) are provided.

  The upper header tank (2) includes a leeward upper header portion (5) located on the leeward side and an upwind header portion (6) located on the leeward side and integrated with the leeward upper header portion (5). And. A refrigerant inlet (7) is provided at the left end of the leeward upper header portion (5), and a refrigerant outlet (8) is provided at the left end of the leeward upper header portion (6). The lower header tank (3) includes a leeward lower header portion (9) located on the leeward side and an upwind lower header portion (11) located on the leeward side and integrated with the leeward lower header portion (9). And. Between the lower header portions (9) and (11) of the lower header tank (3), a groove-shaped drainage portion (12) that opens upward and extends in the left-right direction is provided (see FIG. 2). Although not shown in the drawing, the bottom header tank (3) has a plurality of drainage holes spaced in the left-right direction in the bottom wall of the drainage section (12) between the lower header sections (9) and (11). Is formed.

  In the heat exchanging core part (4), a plurality of, in this case, two aluminum flat refrigerants arranged at intervals in the ventilation direction with the longitudinal direction oriented vertically and the width direction oriented in the ventilation direction A plurality of pipe sets (14) made up of pipes (13) are arranged at intervals in the left-right direction, so that adjacent to the pipe set (14) made up of two refrigerant flow pipes (13) arranged in the ventilation direction. A gap (17A) (17B) is formed between the mating objects. The upper end portion of the refrigerant flow pipe (13) arranged on the leeward side is connected to the leeward upper header portion (5), and the lower end portion is connected to the leeward lower header portion (9). Further, the upper end portion of the refrigerant flow pipe (13) arranged on the windward side is connected to the windward upper header portion (6), and the lower end portion thereof is connected to the windward lower header portion (11). In the refrigerant flow pipe (13), a plurality of flow paths (15) arranged in the ventilation direction are formed via a partition wall (16) (see FIGS. 3 and 4).

  An aluminum regenerator container (18) in which a regenerator material is sealed in a part of the total gaps (17A) and (17B) in the heat exchange core part (4) and a plurality of first gaps (17A) is provided for each pipe. It arrange | positions so that two refrigerant | coolant flow pipes (13) which comprise a group (14) may be straddled, and it joins with both refrigerant | coolant flow pipes (13) with the brazing material. Hereinafter, joining with a brazing material is referred to as brazing. Of the total gaps (17A) and (17B) in the heat exchange core part (4), the remaining plurality of second gaps (17B) are made of an aluminum brazing sheet having a brazing filler metal layer on both sides and extend in the ventilation direction. Corrugated outer fins (19) comprising a wave bottom portion extending in the ventilation direction and a connecting portion connecting the wave top portion and the wave bottom portion are provided in two refrigerant flow pipes (13) constituting each pipe assembly (14). It arrange | positions so that it may straddle, and is brazed to both refrigerant | coolant distribution pipes (13). There are a plurality of (here, three) second gaps (17B) between two first gaps (17A) adjacent in the left-right direction. The number of second gaps (17B) between two first gaps (17A) adjacent in the left-right direction is preferably 2 or more, and the upper limit is preferably 7. In addition, outer fins (19) are also arranged outside the pipe assemblies (14) at both the left and right ends so as to straddle the two refrigerant circulation pipes (13) constituting the pipe assembly (14). 13), and further, aluminum side plates (21) are arranged on the outer sides of the outer fins (19) at the left and right ends, and are brazed to the outer fins (19).

  The windward end of the outer fin (19) is at the same position in the ventilation direction as the windward end of the windward refrigerant flow pipe (13), and the windward end of the outer fin (19) is the leeward refrigerant flow pipe ( It is in a position slightly protruding from the leeward side end of 13), for example, about 1 mm toward the leeward side (see FIG. 3). The width of the outer fin (19) in the ventilation direction is referred to as the full width of the heat exchange core (4) in the ventilation direction.

  In the case of the evaporator (1) of this embodiment, the refrigerant passes through the refrigerant inlet (7) and enters the leeward upper header portion (5) of the evaporator (1) and passes through the entire refrigerant circulation pipe (13). It flows out from the refrigerant outlet (8) of the upper upper header section (6).

  As shown in FIGS. 2 and 3, the regenerator material container (18) is a flat, hollow shape having a substantially vertical rectangular shape with the longitudinal direction directed in the vertical direction and the width direction directed in the ventilation direction, and the heat exchange core part (4 ) Of the container body portion (22) brazed to the two refrigerant flow pipes (13) of each pipe assembly (14) and the leeward of the container body section (22). It consists of a part of the side edge part, here, only an upper part, and an outward projecting part (23) provided so as to project further to the leeward side than the leeward side end part of the outer fin (19). The outward projecting portion (23) is provided over a certain length from a portion slightly lowered from the upper end of the cold storage material container (18).

  The cool storage material container (18) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and the peripheral belt-like portions (24a) (25a) having a certain width are brazed to each other. The aluminum container constituting plates (24) and (25) having two substantially vertical rectangular shapes. In the cold storage material container (18), a hollow cold storage material enclosing part (excluding the belt-like parts (24a) (25a) of both container component plates (24) and (25)) is bulged outward ( 26) is formed from the container body part (22) to the outwardly projecting part (23), and the regenerator material is put in the regenerator material enclosing part (26).

  On the outer surface of the left and right side walls (27) of the portion of the cool storage material enclosure (26) of the cool storage material container (18) on the left and right side walls (27), the upper and lower ends have a constant channel length in the vertical direction And a plurality of condensed water drainage grooves (28) for draining the condensed water from above to drain from the lower end opening are formed at intervals in the ventilation direction. Each condensate drainage groove (28) is provided at a portion of the cooler material enclosure (26) of the cool storage material container (18) on the left and right side walls (27) of the container body (22) and bulges outward. It is formed between the two raised drain groove projections (29). Two adjacent condensate drainage grooves (28) share a drainage groove convex portion (29) positioned between the two condensate drainage grooves (28). The bulge heights of all the drain groove convex portions (29) of the left and right side walls (27) of each cold storage material container (18) are equal and the bulge of the convex portion for the expansion portion (34) described later It is below the height, and at least a part of the bulging ends of all the drain groove convex portions (29) constitutes two pipe assemblies (14) on both the left and right sides forming the first gap (17A). It is brazed to the refrigerant flow pipe (13). Therefore, at least a part of the total length of the opening of the condensed water drain groove (28) facing the refrigerant flow pipe (13) side is blocked by the refrigerant flow pipe (13). A closed portion blocked by the refrigerant flow pipe (13) in the condensed water drainage groove (28) is indicated by (31). The condensate drainage groove (28) and drainage groove projection (29) on the left side wall (27) and the condensate drainage groove (28) and drainage groove projection (29) on the right side wall (27) So as not to overlap with each other in the same horizontal plane. A very small amount of air also flows through the condensate drain (28).

  In the container main body portion (22) of the cool storage material container (18), an offset aluminum inner fin (32) is disposed over substantially the entire vertical direction. The inner fin (32) includes a wave crest portion (33a) extending in the vertical direction, a wave bottom portion (33b) extending in the vertical direction, and a connecting portion (33c) connecting the wave crest portion (33a) and the wave bottom portion (33b). A plurality of corrugated strips (33) are arranged in the vertical direction and are integrally connected to each other, and are formed by connecting the corrugated strips (33) adjacent to each other in the vertical direction. (33b) The two are displaced in the ventilation direction. The connecting portion (33) of the corrugated strip (33) includes a heat transfer portion that transfers heat between the side wall (27) of the cold storage material enclosure (26) and the cold storage material in the cold storage material enclosure (26). At least one of a wave crest (33a) provided at one of the left and right ends (here, the right end) of the connecting portion (33c) and a wave bottom (33b) provided at the other end (here, the left end). The part is brazed to the left and right side walls (27) of the portion of the cool storage material enclosure (26) of the cool storage material container (18) that exists in the container main body (22). In this embodiment, the wave crest portion (33a) and the wave bottom portion (33b) of the corrugated strip (33) are wall-like portions located on a vertical plane extending in the ventilation direction, and the connecting portion (33c) is the left-right direction. It is a wall-shaped part located on the vertical surface extended in.

  As shown in FIGS. 3 and 4, the condensate drainage groove (28) is closed at the closed portion (31) where the opening facing the refrigerant flow pipe (13) is closed by the refrigerant flow pipe (13). Two or more partition walls (16) of the refrigerant flow pipe (13) exist within the range of the ventilation direction of the portion. Further, in the closed part (31), the connecting part (33c) which is the heat transfer part of the corrugated strip (33) of the inner fin (31) is one of the wave peak part (33a) and the wave bottom part (33b). The closed portion (31) of the condensate drainage groove (28) on one of the left and right side walls (27) of the cold storage material enclosure (26) of the cold storage material container (18) through one side It is joined only to the part which becomes the bottom wall, and is separated from the other side wall (27). Further, the wall thickness of the peripheral wall of the refrigerant flow pipe (13) is t1 mm, and the bottom wall of the condensate drainage groove (28) in the side wall (27) of the cool storage material enclosure (26) of the cool storage material container (18) is formed. When the thickness is t2 mm and the depth of the condensate drainage groove (28) is Hmm, the relationship of t1 <t2, 2.t1> t2, and H> t1 + t2 is satisfied.

  The outwardly projecting portion (23) of the cool storage material container (18) is provided over a certain length from a portion slightly below the upper end of the leeward side edge of the container body (22), and the outwardly projecting portion The vertical length of (23) is shorter than the vertical length of the container body (22). The vertical length of the outwardly projecting portion (23) is preferably 30% or less of the vertical length of the cool storage material container (18). The portion of the cool storage material enclosure (18) of the cool storage material enclosure (26) that swells in the left and right side walls (27) on the outwardly projecting portion (23) and bulges in both the left and right directions, and the lateral dimension is the regenerator enclosure portion An inflatable portion (23a) having a dimension equal to or larger than the horizontal dimension of (26) is provided, and the inflatable portion (23a) is outside in the ventilation direction from the downstream end of the outer fin (19) in the ventilation direction (ventilation direction). It is located on the downstream side. The expansion part (23a) includes an expansion part convex part (34) provided on the left and right side walls (27) of the regenerator material enclosing part (26) and bulging outward.

  A cool storage material injection member (35) is fixed to the upper end of the outwardly projecting portion (23) of the cool storage material container (18), and the cool storage material is passed through the cool storage material injection member (35) and the cool storage material enclosing portion (26 The cool storage material injection member (35) is sealed after the cool storage material is injected into the cool storage material enclosure (26).

  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 compressed by the compressor and passed through the condenser and the expansion valve passes through the refrigerant inlet (7) and the evaporator with the cold storage function (1) Enters the leeward upper header portion (5) and flows out from the refrigerant outlet (8) of the leeward upper header portion (6) through the entire refrigerant flow pipe (13). And while a refrigerant | coolant flows through the inside of a refrigerant | coolant distribution pipe | tube (13), it heat-exchanges with the air which passes 2nd clearance gap (17B), and a refrigerant | coolant flows out into a gaseous phase.

  During the operation of the compressor, the cold heat of the refrigerant flowing in the refrigerant flow pipe (13) is transferred to the container body (22) on the left and right side walls (27) of the cool storage material enclosure (26) of the cool storage material container (18). It is transmitted directly to the cold storage material in the cool storage material container (18) through the bulging top wall of the drain groove convex portion (29) provided in the existing portion, and the bulging top wall of the drain groove convex portion (29). From the left and right side walls (27) through the parts that are not brazed to the refrigerant flow pipe (13) and the inner fin (32), it is transmitted to the whole of the cold storage material in the cold storage material container (18) and cold heat is stored in the cold storage material. It is done.

  In addition, during the operation of the compressor, condensed water is generated on the surface of the cool storage material container (18), the condensed water enters the condensed water drainage groove (28), and the surface tension causes both sides of the condensed water drainage groove (28). It collects in the condensed water drainage groove (28) along the drainage groove convex part (29). 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 drain groove (28) and drains downward.

  By the way, depending on conditions, the condensed water that is generated on the outer surface of the cold storage material container (18) and enters the condensed water drainage groove (28) during operation of the compressor may freeze. Here, in the closed portion (31), there are two or more partition walls (16) of the refrigerant flow pipe (13) within the range of the closed portion (31) in the ventilation direction, and the inner fin (31) The connecting portion (33c) of the corrugated strip (33) is the condensed water drainage on one of the left and right side walls (27) of the cold storage material enclosure (26) of the cold storage material container (18). It is joined only to the bottom wall of the closed part (31) of the groove (28) and is separated from the other side wall (27), and the thickness of the peripheral wall of the refrigerant flow pipe (13) is t1 mm, The wall thickness of the bottom wall of the condensate drainage groove (28) in the side wall (27) of the cool storage material enclosure (26) of the cool storage material container (18) is t2 mm, and the depth of the condensate drainage groove (28) is In the case of Hmm, since the relationship of t1 <t2, 2 · t1> t2, and H> t1 + t2 is satisfied, the same amount as the evaporator with the cool storage function described in Patent Document 1 is provided on the outer surface of the cool storage material container (18). Of condensed water Even if the condensed water enters the condensed water drainage groove (28) and freezes at the closed portion (31) and the volume expands, the peripheral wall of the refrigerant flow pipe (13) and the cold storage container (18) The force acting on the bottom wall of the condensate drain groove (28) in the side wall (27) of the cool storage material enclosure (26) is smaller than that of the evaporator with a cool storage function described in Patent Document 1. Therefore, deformation of the peripheral wall of the refrigerant flow pipe (13) and the bottom wall of the condensate drainage groove (28) in the side wall (27) of the cold storage material enclosure (26) of the cold storage container (18) is suppressed. The Moreover, in the closed portion (31), there are two or more partition walls (16) of the refrigerant flow pipe (13) within the range of the closed portion (31) in the ventilation direction, and the wavy band of the inner fin (31) The connection part (33c), which is the heat transfer part of the plate (33), is connected to the regenerator material enclosure part (26) of the regenerator container (18) via one of the wave crest part (33a) and the wave bottom part (33b). ) Of the left and right side walls (27) of the condensate drainage groove (28) in either one of the side walls (27), and the other side wall (27) 27) is separated from the bottom by the force acting on the bottom wall of the condensate drainage groove (28) in the side wall (27) of the cool storage material enclosure (26) of the cool storage material container (18). The wall portion is easily deformed. As a result, the force acting on the peripheral wall of the refrigerant flow pipe (13) is reduced, and the deformation of the peripheral wall of the refrigerant flow pipe (13) is effectively suppressed.

   When the compressor is stopped, the cold stored in the cool storage material in the cool storage material container (18) is transferred to the container main body (22) on the left and right side walls (27) of the cool storage material enclosure (26) of the cool storage material container (18). ) Is transferred directly to the refrigerant flow pipe (13) through the bulging top wall of the drain groove convex portion (29) provided in the portion existing in the inner fin (32), and the refrigerant flows on the left and right side walls (27) from the inner fin (32). The refrigerant is transferred to the refrigerant flow pipe (13) through the portion not brazed to the pipe (13) and the bulging top wall of the drain groove convex portion (29), and further passes through the refrigerant flow pipe (13). It is transmitted to the outer fin (19) brazed to the opposite side of the cold storage material container (18) in the pipe (13). The cold heat transmitted to the outer fin (19) is transmitted to the air passing through the second gap (17B) adjacent to the first gap (17A) where the cool storage material container (18) is disposed. The cold heat transmitted to the outer fin (19) is transmitted to the air passing through the second gap (17B) adjacent to the first gap (17A) where the cool storage material container (18) is disposed. 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-described embodiment, the condensate drainage groove (28) and the left and right side walls (27) of the portion of the cool storage material enclosure (26) of the cool storage material container (18) existing on the container body (22) The drain groove convex portion (29) is provided, but is not limited to this, and the condensate drain groove (28) and the drain groove convex portion (29) are provided on either side wall. May be.

  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
(4): Heat exchange core
(13): Refrigerant distribution pipe
(15): Flow path
(16): Partition wall
(17A) (17B): Gap
(18): Cold storage container
(26): Cold storage material enclosure
(27): Side wall
(28): Condensate drain
(29): Convex part for drainage
(31): Blocked part
(32): Inner fin
(33c): Wavy strip connecting part (heat transfer part)

Claims (2)

Heat having a cold storage material container in which a plurality of flat refrigerant flow pipes having a longitudinal direction directed in the vertical direction and a width direction directed in a ventilation direction, and a cold storage material enclosure portion are provided, and the cold storage material enclosure is enclosed in the cold storage material enclosure portion The heat exchanger core portion includes a plurality of refrigerant flow pipes arranged at intervals in the left-right direction, whereby a gap is formed between adjacent refrigerant flow pipes, and the entire gap The regenerator container is disposed in a part of the plurality of gaps so as to be in contact with the refrigerant flow pipe, and the refrigerant flow pipe is formed with a plurality of flow paths arranged in the ventilation direction via the partition wall, Heat transfer is performed between the side wall of the regenerator material enclosure and the regenerator material in the regenerator material enclosure within the portion of the regenerator material enclosure of the regenerator material container located in the range of the ventilation direction of the heat exchange core. Inner fin with a heat section is placed A plurality of condensate drains having a fixed channel length in the vertical direction are formed on the outer surfaces of the left and right side walls of the portion of the cool storage material enclosure of the cool storage material enclosure located within the range of the ventilation direction of the heat exchange core. Each condensate drainage groove is formed at intervals in the ventilation direction, and the left and right side walls of the cool storage material enclosure of the cool storage material container are spaced apart in the ventilation direction to bulge outward, and the bulge end Is formed between two drain groove convex portions joined to the refrigerant flow pipe, and at least a portion of the total length of the opening facing the refrigerant flow pipe side in each condensed water drain groove is the refrigerant flow pipe. An evaporator with a cold storage function blocked by
In the closed part where the opening facing the refrigerant flow pipe side in the condensed water drainage groove is closed by the refrigerant flow pipe, there are two or more partition walls of the refrigerant flow pipe in the range of the ventilation direction of the closed part, Further, in the closed portion, the heat transfer portion of the inner fin is a bottom wall of the closed portion of the condensed water drainage groove on either one of the left and right side walls of the cool storage material enclosure of the cool storage material container And is separated from the other side wall,
When the wall thickness of the peripheral wall of the refrigerant flow pipe is t1 mm, the thickness of the bottom wall of the condensate drainage groove on the side wall of the cool storage material enclosure of the cool storage material container is t2 mm, and the depth of the condensate drainage groove is Hmm , T1 <t2, 2 · t1> t2, H> t1 + t2, an evaporator with a cold storage function. The condensate drainage groove and drainage groove convex portion on one side wall of the cool storage material enclosure of the cool storage material container and the condensate drainage groove and drainage groove convex portion on the other side wall partially overlap, but overall The evaporator with a cool storage function according to claim 1, wherein the evaporator is provided so as to be deviated in the ventilation direction in the same horizontal plane so as not to overlap.

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