JP6182442B2 - 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 and 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 an evaporator with a cold storage function, the present applicant has previously stated that a plurality of flat refrigerant flow pipes whose longitudinal direction faces the vertical direction and whose width direction faces the ventilation direction are spaced apart in the thickness direction of the refrigerant flow pipe. Arranged in parallel, a gap is formed between adjacent refrigerant flow pipes, a regenerator container in which latent heat regenerator material is sealed in a plurality of gaps among all the gaps is disposed, and the remaining gaps The outer fin is arranged on the refrigerant circulation pipe and is composed of two metal container constituent plates in which the cold storage material containers are joined to each other, and at least one of the container constituent plates is a container constituent plate. By bulging outward, the cool storage material container is provided with a cool storage material enclosure, and the cool storage material container has a vertical length of the outer fin in the total height of the gap formed between the adjacent refrigerant flow pipes. Fortune Proposed a cold storage function evaporator disposed in the portion that (see Patent Document 1).

  However, in the case of the evaporator with a cool storage function described in Patent Document 1, the cool storage material container occupies the entire length of the vertical length of the outer fin in the total height of the gap formed between the adjacent refrigerant flow pipes. Since it is arrange | positioned, there exists a problem that the quantity of the cool storage material to use increases and cost becomes high.

JP 2012-42167 A

  An object of the present invention is to provide an evaporator with a cold storage function that solves the above-described problems and can reduce costs.

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

1) 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 in the thickness direction of the refrigerant flow pipe, and adjacent refrigerant flow A gap is formed between the pipes, a regenerator container in which a regenerator material is sealed in a part of the entire gap and a plurality of gaps is disposed, and outer fins are disposed in the remaining gaps to form a refrigerant flow pipe. The regenerator material is composed of two metal container constituent plates joined together, and at least one of the two container constituent plates is bulged outwardly. An evaporator with a cool storage function in which a container is provided with a cool storage material enclosure,
The cold storage material container is disposed in a portion excluding the lower part of the total height of the gap formed between adjacent refrigerant flow pipes and brought into contact with the refrigerant flow pipe, and the cold storage in the gap where the cold storage material container is arranged. A condensed water storage member having a ventilation portion is disposed below the material container and brought into contact with the refrigerant flow pipe, and there is a condensed water storage member in the gap where the cold storage material container and the condensed water storage member are disposed. An evaporator with a cold storage function in which the ventilation resistance of the portion is larger than the ventilation resistance of the gap in which the outer fin is disposed.

  2) Continuing to the lower ends of the two container constituting plates constituting the cold storage material container, a sandwiching portion for sandwiching the condensed water storage member from both sides of the refrigerant flow pipe in the arrangement direction is provided in a downward projecting manner. The evaporator with a cool storage function according to the above 1), wherein the sandwiching portion is in contact with the refrigerant flow pipe, and the condensed water storage member is sandwiched by the sandwiching portions of the two container constituting plates.

  3) A plurality of condensate drainage channels that are gradually lowered from the upper end to the lower end and open at both the upper and lower ends on the outer surface of the portion that forms the cool storage material enclosing portion of the two container constituting plates constituting the cool storage material container Are formed at intervals, and each condensate drainage channel is formed between two convex portions provided on the container component plate and bulging outward, and the sandwiching portion is connected to the lower end of the container component plate Provided through the wall, a plurality of condensed water passage holes are formed in the connecting wall in a penetrating manner, a plurality of condensed water passage portions are formed in the condensed water storage member, and provided on the outer surface of the two container constituent plates The evaporator with a cold storage function according to 2) above, wherein the protruding end of the convex part and the sandwiching part are brazed to the refrigerant flow pipe.

  4) The evaporator with a cold storage function according to 3) above, wherein a through hole is formed in a portion brazed to the refrigerant flow pipe in the sandwiching portion provided integrally with both the container constituting plates.

  5) The outer fin is composed of a corrugated fin consisting of a wave crest extending in the ventilation direction, a wave bottom extending in the ventilation direction, and a connecting portion connecting the wave crest and the wave bottom, and the condensed water storage member is a wave extending in the ventilation direction. The corrugated fin is composed of a top portion, a wave bottom portion extending in the ventilation direction, and a connecting portion connecting the wave top portion and the wave bottom portion, and a pitch that is an interval between adjacent wave top portions and wave bottom portions in the condensed water storage member is an outer The above-mentioned 1) to which a plurality of condensate passage parts composed of through holes are formed in the connecting part of the condensate storage member, which is smaller than the pitch that is the interval between adjacent wave crests and wave bottoms in the fin. The evaporator with a cool storage function according to any one of 4).

  6) The evaporator with a cold storage function according to 5) above, wherein a pitch, which is a distance between adjacent wave tops and wave bottoms in the condensed water storage member, is 1 to 2 mm.

  7) The outer fin consists of a corrugated fin consisting of a wave crest extending in the ventilation direction, a wave bottom extending in the ventilation direction, and a connecting portion connecting the wave crest and the wave bottom, and the condensed water storage member is a wave extending in the ventilation direction. Formed by connecting a plurality of corrugated strip plates in the ventilation direction and integrally connected to each other in the ventilation direction, and the wave bottom portion extending in the ventilation direction, and the wave bottom portion extending in the ventilation direction. Is the offset fin shape in which the wave crests and wave bottoms of two adjacent waved strips are displaced in the vertical direction, and the pitch that is the interval between the waved portions of adjacent waved strips in the condensed water storage member is Condensate passage part between adjacent corrugated strips of condensate water storage member, which is smaller than the pitch that is the distance between adjacent wave crests and wave bottoms in the outer fin Evaporator with a cool storage function according to any one of the above 1) to 4) are formed.

  8) The evaporator with a cold storage function according to 7) above, wherein a pitch, which is a distance between adjacent wave crest portions and wave bottom portions of the corrugated strip in the condensed water storage member, is 1 to 2 mm.

  According to the evaporator with a cool storage function of the above 1) to 8), the cool storage material container is disposed in a portion excluding the lower part of the overall height of the gap formed between the adjacent coolant flow pipes. Therefore, the amount of the regenerator material used can be reduced as compared with the evaporator with a regenerator function described in Patent Document 1, and the cost can be reduced. In addition, a condensate storage member having a ventilation portion is disposed in a portion below the cool storage material container in the gap where the cool storage material container is disposed and is brought into contact with the refrigerant flow pipe, and the cool storage material container and the condensed water storage member are Since the ventilation resistance of the portion where the condensed water storage member exists in the arranged gap is larger than the ventilation resistance of the gap where the outer fin is arranged, it is condensed on the surface of the condensed water storage member during the operation of the compressor. Water is generated and the condensed water is held in the condensed water storage member. When the engine is stopped and the compressor is stopped, if the condensed water stored in the condensed water storage member is cold as sensible heat or if the condensed water is frozen in the condensed water storage member The cold heat as the latent heat of the frozen condensed water and the cold heat as the sensible heat of the condensed water after melting are cooled to the air flowing through the ventilation portion of the condensed water storage member. Furthermore, when the engine is stopped and the compressor is stopped, the cooling heat as the sensible heat of the condensed water described above, or the latent heat of the frozen condensed water if the condensed water is frozen in the condensed water storage member And the sensible heat as the sensible heat of the condensed water after being melted are transmitted to the outer fin through the refrigerant flow pipe in contact with the condensed water storage member, and the gap where the outer fin is arranged from the outer fin It is allowed to cool down in the air flowing through. Therefore, it is possible to extend the cooling time, and it is possible to suppress a rapid decrease in the cooling capacity. In addition, the condensed water currently hold | maintained at the condensed water storage member is drained below through a condensed water passage part.

  According to the evaporator with a cold storage function of 2) above, the workability of the temporary assembly before brazing of the refrigerant flow pipe, the outer fin, the container component plate, and the condensed water storage member at the time of manufacture is improved.

  According to the evaporator with a cold storage function of 3) above, the condensed water generated on the outer surface of the container constituting plate constituting the cold storage material container is accumulated in the condensed water drainage channel along the two convex portions by surface tension. In this case, 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 at once in the condensed water drainage channel, and the condensed water passes through the connecting part of the container component plate. It reaches the condensed water storage member through the hole and is held by the condensed water storage member. Therefore, in addition to the condensed water generated on the surface, the condensed water storage member also retains the condensed water generated on the outer surface of the container constituting plate of the cold storage material container, and the cooling time when the compressor is stopped Can be effectively extended.

  According to the evaporator with a cold storage function of 4) above, the brazing area between the refrigerant flow pipe and the sandwiching portions of the two container constituent plates is smaller than when no through hole is formed. Therefore, the gap generated when the two parts are not completely brazed between the refrigerant flow pipe and the sandwiching portion of the container component plate is also smaller than when no through hole is formed. The amount of condensed water that enters inside is also reduced. As a result, a large amount of condensed water stays between the refrigerant flow pipe and the sandwiching portion of the container component plate, and the condensed water is prevented from freezing. Peeling from can be prevented over a long period of time.

  According to the evaporator with a cold storage function of 5) to 8) above, the configuration of the condensed water storage member can be simplified, and condensed water can be effectively stored in the condensed water storage member.

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 the front view seen from the ventilation direction downstream which shows the whole structure of the evaporator with a cool storage function of this invention. It is a left view which shows the cool storage material container used for the evaporator with a cool storage function of FIG. 1 and FIG. It is an AA line expanded sectional view of FIG. It is a disassembled perspective view which shows the cool storage material container used for the evaporator with a cool storage function of FIG. 1 and FIG. FIG. 3 is an enlarged view of a main part of FIG. 2. It is a figure equivalent to FIG. 5 which shows the modification of the condensed water storage member used for the evaporator with a cool storage function of FIG. 1 and FIG. It is a figure equivalent to FIG. 6 which shows the modification of the condensed water storage member used for the evaporator with a cool storage function of FIG. 1 and FIG.

  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) is referred to as the front, and the opposite side is referred to as the rear. Accordingly, when viewed from the front to the rear, the top, bottom, left and right are the top, bottom, left, and right in FIG.

  Moreover, the same code | symbol is attached | subjected to the same thing and the same part through all drawings, and the overlapping description is abbreviate | omitted.

  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 6 show the configuration of the main part thereof.

  1 and 2, the evaporator (1) with a cold storage function is composed of an aluminum first header tank (2) and an aluminum second one arranged at intervals in the vertical direction with the longitudinal direction directed in the horizontal direction. A header tank (3) and a heat exchange core part (4) provided between both header tanks (2) and (3) are provided.

  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 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 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.

  In the heat exchange core part (4), a plurality of extruded aluminum flat refrigerant flow pipes (12) whose longitudinal direction faces the up-down direction and whose width direction faces the ventilation direction (front-rear direction) are provided in the left-right direction ( The refrigerant flow pipes (12) are arranged in parallel at intervals in the thickness direction). Here, a plurality of sets (13) consisting of two refrigerant flow pipes (12) 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 (12) A gap (14A) (14B) is formed between adjacent members of the set (13). An upper end portion of the front refrigerant flow pipe (12) 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 (12) is connected to the windward upper header portion (6), and the lower end portion thereof is connected to the windward lower header portion (11).

  Aluminum in which a regenerator material (not shown) is enclosed in a plurality of gaps (14A) and non-adjacent gaps (14A) of all gaps (14A) (14B) in heat exchange core (4) The cold storage material container (15) and the aluminum condensate storage member (16) are arranged so as to straddle the front and rear refrigerant flow pipes (12) and to be in contact with both refrigerant flow pipes (12). The cool storage material container (15) is disposed in a portion excluding the lower portion of the overall height of the gap (14A) (a portion excluding the lower portion of the overall length of the outer fin (17) in the vertical direction described later). The condensed water storage member (16) is disposed in the lower part of the cold storage material container (15).

  Of the total gap (14A) (14B) in the heat exchange core part (4), the remaining gap (14B) is made of an aluminum brazing sheet having a brazing material layer on both sides, and the wave crest (17a) extends in the front-rear direction. A corrugated outer fin (17) comprising a wave bottom portion (17b) extending in the front-rear direction and a connecting portion (17c) connecting the wave crest portion (17a) and the wave bottom portion (17b) is formed by both front and rear refrigerant flow pipes (12 ) And brazed to both the front and rear refrigerant flow pipes (12) constituting the pair (13) on both the left and right sides that form a gap (14B) (see FIG. 6). A plurality of louvers (not shown) extending in the left-right direction are provided side by side in the front-rear direction at the connecting portion (17c) of the outer fin (17). Here, outer fins (17) are respectively disposed in the gaps (14B) adjacent to the left and right sides of the gap (14A) where the cold storage material container (15) is disposed, and the cold storage material containers ( Between 15), a plurality, here two outer fins (17) are located. 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 (13) of the refrigerant flow pipes (12) at the left and right ends, and the front and rear refrigerant flow pipes (12) 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).

  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 (12). It flows out from the refrigerant outlet (8) of the upper upper header section (6).

  As shown in FIGS. 3 to 5, the regenerator container (15) has a flat hollow shape in which the longitudinal direction is directed in the vertical direction and the width direction is directed in the front-rear direction, and the front side edge of the front side refrigerant circulation pipe (12). And the container body part (19) brazed to the front and rear refrigerant flow pipes (12) of each pair (13), and the front edge of the container body part (19) (the leeward edge) Part), which is connected to only the upper part here, and includes an outward projecting part (21) provided so as to project forward (outside in the ventilation direction) from the front edge of the front refrigerant flow pipe (12). The inside of the container main body part (19) and the outwardly projecting part (21) of the cold storage material container (15) are communicated with each other, whereby a hollow cold storage material enclosure (15a) is provided in the cold storage material container (15). ) Is formed. The outward projecting part (21) is provided over a certain length from the upper end of the front edge of the container body part (19), and the vertical length of the outward projecting part (21) is the container body part ( It is shorter than the vertical length of 19).

  A plurality of condensate drainage channels (22) that are gradually lowered from the upper end to the lower end and open at both upper and lower ends on the outer surfaces of the left and right side walls (19a) of the container main body (19) of the cold storage material container (15). It is formed at intervals. Each condensate drainage channel (22) is provided between two convex portions (23) provided on the left and right side walls (19a) of the container body (19) of the cold storage material container (15) and bulging outward. The two adjacent condensate drainage channels (22) that are formed share a convex portion (23) located between the two condensate drainage channels (22). The bulging top walls of all the convex portions (23) are flat and located on the same plane, and the flat bulging top walls of the convex portions (23) are in contact with the refrigerant flow pipe (12). It is brazed. The condensate drainage channel (22) and the convex portion (23) of the left side wall (19a) of the container body (19) and the condensate drainage channel (22) and the convex portion (23) of the right side wall (19a) are: A portion overlaps but is slightly shifted in the ventilation direction so as not to overlap the whole.

  In the container main body portion (19) of the cold storage material container (15), an offset aluminum inner fin (24) is disposed over substantially the entire vertical direction. The inner fin (24) includes a wave crest portion (25a) extending in the vertical direction, a wave bottom portion (25b) extending in the vertical direction, and a connecting portion (25c) connecting the wave crest portion (25a) and the wave bottom portion (25b). A plurality of corrugated strips (25) are arranged in the vertical direction and are integrally connected to each other, and are formed by connecting the corrugated strips (25a) adjacent to each other in the vertical direction. (25b) The two are displaced in the front-rear direction. The vertical lengths of the wave crest (25a), the wave bottom (25b), and the connecting portion (25c) in each corrugated strip (25) are equal. The inner fin (24) has inner surfaces of the left and right side walls (19a) of the container body (19) of the cool storage material container (15), that is, the convex portions (23) of the left and right side walls (19a) of the container body (19). The part which is not formed is brazed. The bulging top wall of the projection (23) contacts the refrigerant flow pipe (12) but does not contact the inner fin (24), so each side wall of the container body (19) of the cold storage material container (15) (19a) is provided with a contact portion that contacts the inner fin (24) and a non-contact portion that does not contact the inner fin (24).

  In the outwardly projecting portion (21) of the cold storage material container (15), an inflating portion (21a) that swells in both the left and right directions and whose dimension in the left and right direction is larger than the dimension in the left and right direction of the container body (19). Is provided, and the expansion part (21a) is located on the outer side in the ventilation direction (downstream side in the ventilation direction) than the outer fin (17).

  As the regenerator material filled in the regenerator material container (15), 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. It is preferable that the cold storage material filling ratio, which is the ratio of the volume of the enclosed cold storage material to the internal volume in the cold storage material enclosure (15a) of the cold storage material container (15), is 70 to 90%. Here, it is preferable that the upper end of the inner fin (24) is located above the upper end of the cool storage material enclosed in the cool storage material container (15). In this case, the cold storage material is always in contact with the inner fin (24) both in the cold storage in which the cold storage material stores cold heat and in the cool discharge in which the cold heat stored in the cold storage material is discharged.

  The cold storage material is injected into the cold storage material container (15) through the cold storage material injection member (26) provided at the upper end of the outward projecting portion (21). The regenerator material injection member (26) has a cylindrical shape that is fixed to the upper end of the outwardly projecting portion (21) and communicates the inside of the outwardly projecting portion (21) to the outside. The upper part of the injection member (22) is crushed and closed after injection of the cold storage material into the cold storage material container (15).

  The strength of the cool storage material container (15) is within the normal operating environment temperature range, for example, in the range of -40 to 90 ° C, and the density of the cool storage material in the liquid phase changes and remains in the cool storage material container (15). Even if the internal pressure rises due to thermal expansion of the air being heated, the strength is designed so as not to break.

  The condensate storage member (16) is a pair of plate-like sandwiches that are integrally provided at the lower end of the cool storage material container (15) so as to protrude downwardly in the left-right direction (the direction in which the refrigerant flow pipes are arranged). It is clamped by the part (27) and brazed to the clamped part (27). Both sandwiched portions (27) are brazed to both the front and rear refrigerant flow pipes (12) in a state of straddling the front and rear refrigerant flow pipes (12) constituting the pair (13) on the left and right sides of the gap (14A). Thus, the condensed water storage member (16) is brought into thermal contact with both the front and rear refrigerant flow pipes (12) constituting the pair (13) on both the left and right sides of the gap (14A). A plurality of through holes (28) are formed in a staggered manner in at least a portion brazed to the refrigerant flow pipe (12) in the entire sandwiched portion (27). The both sandwiched portions (27) are provided at the lower end of the cool storage material container (15) via a horizontal connecting wall (29), and the connecting wall (29) has a plurality of through-shaped condensed water passage holes ( 31) are formed at intervals in the front-rear direction.

  The condensed water storage member (16) is formed of an aluminum brazing sheet having a brazing filler metal layer on both sides, and has a wave crest (16a) extending in the front-rear direction, a wave bottom (16b) extending in the front-rear direction, and a wave crest (16a) The corrugated fin is formed of a connecting portion (16c) that connects the wave bottom portion (16b) and the wave crest portion (16a) and the wave bottom portion (16b) are brazed to the sandwiching portion (27). And the space | gap between the adjacent connection parts (16c) of the condensed water storage member (16) is a ventilation part. Further, in the connecting portion (16c) of the condensed water storage member (16), a plurality of louvers (not shown) extending in the left-right direction are formed side by side in the front-rear direction, and through holes generated by forming the louvers are formed, A plurality of condensed water passage portions of the condensed water storage member (16) are formed. In addition, instead of the louver, only the through hole is formed in the connecting portion (16c) of the condensed water storage member (16), thereby forming a plurality of condensed water passage portions in the condensed water storage member (16). May be.

  As shown in FIG. 6, the pitch (P1), which is the distance between the adjacent wave crest (16a) and wave bottom (16b) in the corrugated fin-shaped condensed water storage member (16), is adjacent to the outer fin (17). It is smaller than the pitch (P2), which is the distance between the matching wave crest (17a) and wave crest (17b), and thereby the gap in which the cold storage material container (15) and the condensed water storage member (16) are arranged ( The ventilation resistance of the portion where the condensed water storage member (16) is present in 14A) is larger than the ventilation resistance of the gap (14B) in which the outer fin (17) is disposed. Moreover, it is preferable that the pitch (P1) which is the space | interval of the adjacent crest part (16a) and the crest part (16b) of the condensed water storage member (16) which consists of a corrugated fin is 1-2 mm.

  The cold storage material container (15) and the sandwiching part (27) are formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and are approximately two rectangular shapes brazed to each other. It consists of aluminum plates (32) (33) (metal container constituent plates), and the cold storage container is provided with at least one of both aluminum plates (32) and (33), here both aluminum plates (32) and (33) The cool storage material enclosure part (15a) is provided by bulging outward. A first bulge portion (32a) (33a) having the same bulge height forming a container body portion (19) and an outwardly projecting portion (21), and a first bulge portion on each aluminum plate (32) (33). A second bulging portion (32b) (33b) provided on the bulging top wall of the portion forming the container body portion (19) in the protruding portion (32a) (33a) and serving as a convex portion (23); Third bulges (32c) (33c) provided on the bulge top wall of the bulges (32a) (33a) forming the outward projections (21) and forming the bulges (21a); A fourth semi-cylindrical bulge provided so as to extend upwardly from the upper ends of the third bulges (32c) and (33c) and communicate with the inside of the third bulges (32c) and (33c). And portions (32d) and (33d).

  A horizontal connecting wall (29) projecting outward in the left-right direction is integrally provided below the lower ends of the first bulges (32a) and (33a) in both aluminum plates (32 and 33). A clamping part (27) is provided integrally with the protruding end of the wall (29).

  The openings of the first bulge portions (32a) and (33a) face each other with the two aluminum plates (32) and (33) sandwiched between the inner fins (24), and the fourth bulge portion ( The small diameter part (26a) provided at the lower part of the injection member (26) is sandwiched between 32d) and (33d), and the condensate storage member (16) is sandwiched between both sandwiched parts (27). In this state, the portions around the first bulges (32a) and (33a) in both the aluminum plates (32) and (33) and the aluminum plates (32) and (33) and the injection member (22) are brazed. By attaching, a cold storage material container (15) is formed, and both the sandwiched portions (27) and the condensed water storage member (16) are brazed. The cold storage material is injected into the cold storage material enclosure (15a) of the cold storage material container (15) through the injection member (26) before the upper portion is crushed after the brazing, and the offset inner fin (24) The whole of the regenerator material enclosing portion (15a) passes through a gap formed between two corrugated strips (25) adjacent in the vertical direction. After the cold storage material is injected, the upper portion of the injection member (26) is crushed and sealed.

  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 (12). Then, while the refrigerant flows through the refrigerant flow pipe (12), heat exchange is performed with the air passing through the lower part of the gap (14A) and the gap (14B), and the refrigerant flows out as a gas phase.

  During the operation of the compressor, the cold heat of the refrigerant flowing in the refrigerant flow pipe (12) is transferred to the refrigerant flow pipe (12) on the left and right side walls (19a) of the container body (19) of the cool storage material container (15). The refrigerant in the left and right side walls (19a) from the bulging top wall of the convex portion (23) is transmitted directly to the cold storage material in the cold storage material container (15) via the bulging top wall of the convex portion (23) attached. Cold energy is stored in the regenerator material by being transmitted to the whole regenerator material in the regenerator material container (15) through the portion not brazed to the flow pipe (12) and the inner fin (24).

  In addition, when the compressor is operating, condensed water is generated on the surface of the regenerator container (15), and the condensed water enters the condensed water drainage channel (22), and on both sides of the condensed water drainage channel (22) due to surface tension. It collects in the condensed water drainage channel (22) along the convex portion (23). When the amount of accumulated condensate increases, the gravity acting on the accumulated condensate becomes greater than the surface tension and flows down in the condensate drainage channel (22), and the condensate passage hole (29) in the connecting wall (29) 31) to the condensed water storage member (16). Further, by being cooled by the refrigerant flowing in the refrigerant flow pipe (12), condensed water is also generated on the surface of the condensed water storage member (16). The condensed water flowing down from the cold storage material container (15) to the condensed water storage member (16) and the condensed water generated on the surface of the condensed water storage member (16) are caused by the surface tension, and the wave crest (16a) and The wave bottom part (16b) collects between the adjacent connecting parts (16c) on the bent inner side of the part brazed to the refrigerant flow pipe (12). When the amount of accumulated condensed water increases, gravity overcomes the surface tension and the condensed water is drained downward through the condensed water passage.

   When the compressor is stopped, the cold heat stored in the cold storage material in the cold storage material container (15) is transferred to the refrigerant distribution pipe (12) in the left and right side walls (19a) of the container body (19) of the cold storage material container (15). It is transmitted directly to the refrigerant flow pipe (12) via the bulging top wall of the convex part (23) brazed to the refrigerant, and from the inner fin (24) to the refrigerant flow pipe (12) on the left and right side walls (19a). It is transmitted to the refrigerant flow pipe (12) through the bulging top wall of the portion not attached and the convex part (23), and further passes through the refrigerant flow pipe (12) to store the cold storage material container in the refrigerant flow pipe (12) ( It is transmitted to the outer fin (17) brazed on the opposite side to 15). The cold heat transmitted to the outer fin (17) is transmitted to the air passing through the gap (14B) adjacent to the gap (14A) where the cool storage material container (15) is arranged. Further, the cold energy stored in the cold storage material in the cold storage material container (15) is transmitted to the air passing between the sandwiched portions (27) via the sandwiched portion (27) and the condensed water storage member (16). At the same time, it is transmitted to the refrigerant flow pipe (12) through the sandwiching portion (27), and further passes through the refrigerant flow pipe (12) to be opposite to the cold storage material container (15) in the refrigerant flow pipe (12). It is transmitted to the attached outer fin (17). The cold heat transmitted to the outer fin (17) is transmitted to the air passing through the gap (14B) adjacent to the gap (14A) where the cool storage material container (15) is arranged. 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.

  Moreover, immediately after the compressor is stopped, the cold water as the sensible heat of the condensed water stored in the condensed water storage member (16) as described above, and the condensed water is frozen in the condensed water storage member (16). In this case, the cold heat as the latent heat of the frozen condensed water and the cold heat as the sensible heat of the condensed condensed water pass through the refrigerant distribution pipes (12) on both the left and right sides through the sandwiched portion (27). Then, it is transmitted to the outer fin (17) brazed to the opposite side of the refrigerant flow pipe (12) from the cold storage container (15), and is released from the outer fin (17) to the air flowing through the gap (14B). It is cooled. Therefore, it is possible to extend the cooling time, and it is possible to suppress a rapid decrease in the cooling capacity.

  7 and 8 show a modification of the condensed water storage member used in the evaporator with a cold storage function according to the present invention.

  The condensed water storage member (40) shown in FIG. 7 and FIG. 8 is formed of an aluminum brazing sheet having a brazing filler metal layer on both sides, and has a wave crest (41a) extending in the front-rear direction (ventilation direction), and extending in the front-rear direction. A plurality of corrugated strips (41) comprising a wave bottom portion (41b) and a connecting portion (41c) connecting the wave crest portion (41a) and the wave bottom portion (41b) are arranged in the front-rear direction and are integrally connected to each other. Are formed in an offset fin shape in which the wave crests (41a) and wave crests (41b) of two waved strips (41) adjacent to each other in the front-rear direction are offset in the vertical direction. The wave crest portion (41a) and the wave bottom portion (41b) of the member (40) are brazed to the sandwiched portion (27). And between the adjacent connection parts (41c) of each corrugated strip (41) is a ventilation part. In addition, the gap formed between the wave crests (41a) and the wave bottoms (41b) of the corrugated strip (41) adjacent to the top and bottom of the condensed water storage member (40) is a condensed water passage. As a result, a plurality of condensed water passage portions are formed in the condensed water storage member (40).

  As shown in FIG. 8, in the condensed water storage member (40) composed of offset fins, the pitch (which is the distance between the wave crests (41a) and the wave bottoms (41b) of the waved strips (41) adjacent in the vertical direction ( P3) is smaller than the pitch (P2), which is the distance between the adjacent wave crests (17a) and wave crests (17b) in the outer fin (17), so that the regenerator container (15) and the condensed water The ventilation resistance of the portion where the condensed water storage member (40) exists in the gap (14A) where the storage member (40) is arranged is larger than the ventilation resistance of the gap (14B) where the outer fin (17) is arranged. ing. The pitch (P3), which is the distance between the wave crest (41a) and the wave bottom (41b) adjacent to each other in the vertical direction of the corrugated strip (41) in the offset fin-shaped condensed water storage member (40), is 1 to 2 mm. It is preferable that

  In the evaporator with cold storage function (1) having the condensed water storage member (40) shown in FIGS. 7 and 8, the condensed water is stored in the condensed water storage member (40) during the operation of the compressor, and the compressor is stopped. The effective use of the cold water of the condensed water at the time is performed as in the above embodiment.

  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
(12): Refrigerant distribution pipe
(13): Tube assembly
(14A) (14B): Gap
(15): Cold storage container
(15a): Cooling material enclosure
(16): Condensate storage member
(16a): Wave peak
(16b): Wave bottom
(16c): Connection part
(17): Outer fin
(17a): Wave peak
(17b): Wave bottom
(22): Condensate drainage channel
(23): Convex
(27): Clamping part
(28): Through hole
(29): Connecting wall
(31): Condensate passage hole
(32) (33): Aluminum plate (container component plate)
(40): Condensate storage member
(41): Wavy strip
(41a): Wave peak
(41b): Wave bottom
(41c): Connection part
(P1) (P2) (P3): Pitch

Claims (8)

A plurality of flat refrigerant flow pipes whose longitudinal direction faces the vertical direction and whose width direction faces the ventilation direction are arranged in parallel at intervals in the thickness direction of the refrigerant flow pipe, and adjacent refrigerant flow pipes A gap is formed between them, a cool storage material container in which the cool storage material is sealed in a part of the entire gap and a plurality of gaps is disposed, and outer fins are disposed in the remaining gap and joined to the refrigerant circulation pipe. The regenerator container is composed of two metal container constituent plates joined to each other, and at least one of the two container constituent plates is bulged outwardly to form a regenerator container. An evaporator with a cool storage function provided with a cool storage material enclosure,
The cold storage material container is disposed in a portion excluding the lower part of the total height of the gap formed between adjacent refrigerant flow pipes and brought into contact with the refrigerant flow pipe, and the cold storage in the gap where the cold storage material container is arranged. A condensed water storage member having a ventilation portion is disposed below the material container and brought into contact with the refrigerant flow pipe, and there is a condensed water storage member in the gap where the cold storage material container and the condensed water storage member are disposed. An evaporator with a cold storage function in which the ventilation resistance of the portion is larger than the ventilation resistance of the gap in which the outer fin is disposed. Continuing to the lower ends of the two container constituting plates constituting the cold storage material container, a sandwiching portion for sandwiching the condensed water storage member from both sides in the direction in which the refrigerant circulation pipes are arranged is provided in a downward projecting manner. The evaporator with a cool storage function according to claim 1, wherein the portion is in contact with the refrigerant flow pipe, and the condensed water storage member is sandwiched by the sandwiching portions of the two container constituent plates. A plurality of condensate drains that are gradually lowered from the upper end to the lower end and open at both the upper and lower ends are spaced on the outer surface of the portion forming the cool storage material enclosing portion in the two container constituent plates constituting the cool storage material container Each condensate drainage channel is formed between two convex portions provided on the container component plate and bulging outward, and the sandwiching portion has a connecting wall at the lower end of the container component plate. A plurality of condensed water passage holes are formed in the connecting wall in a penetrating manner, a plurality of condensed water passage portions are formed in the condensed water storage member, and a convex portion provided on the outer surface of the two container constituent plates The evaporator with a cool storage function according to claim 2, wherein the protruding end and the sandwiching portion are brazed to the refrigerant flow pipe. The evaporator with a cool storage function according to claim 3, wherein a through hole is formed in a portion brazed to the refrigerant flow pipe in a sandwiching portion provided integrally with both container constituting plates. The outer fin is composed of a corrugated fin composed of a wave crest extending in the ventilation direction, a wave bottom extending in the ventilation direction, and a connecting portion connecting the wave crest and the wave bottom, and the condensed water storage member is a wave crest extending in the ventilation direction, It is a corrugated fin shape composed of a wave bottom portion extending in the ventilation direction and a connecting portion that connects the wave top portion and the wave bottom portion, and a pitch that is an interval between adjacent wave crest portions and wave bottom portions in the condensed water storage member is It is smaller than the pitch which is the space | interval of an adjacent wave crest part and a wave bottom part, The some condensed water passage part which consists of a through-hole is formed in the connection part of a condensed water storage member. The evaporator with a cool storage function as described in any one of them. The evaporator with a cold storage function according to claim 5, wherein a pitch, which is an interval between adjacent wave crests and wave crests in the condensed water storage member, is 1 to 2 mm. The outer fin is composed of a corrugated fin composed of a wave crest extending in the ventilation direction, a wave bottom extending in the ventilation direction, and a connecting portion connecting the wave crest and the wave bottom, and the condensed water storage member is a wave crest extending in the ventilation direction, A plurality of corrugated strips composed of a wave bottom portion extending in the ventilation direction and a connecting portion that connects the wave top portion and the wave bottom portion are arranged in the ventilation direction and integrally connected to each other, and are adjacent to each other in the ventilation direction. The two corrugated strips are offset fins in which the wave crests and the wave bottoms are displaced in the vertical direction, and the pitch that is the distance between the wave crests of adjacent corrugated strips in the condensed water storage member is the outer fin. Is smaller than the pitch, which is the distance between the adjacent wave crest and wave bottom, and the condensate passage is between adjacent wave strips of the condensate reservoir. Evaporator with a cool storage function according to any one of claims 1 to 4 have been made. The evaporator with a cool storage function according to claim 7, wherein a pitch that is a distance between adjacent wave crests and wave crests of the corrugated strip in the condensed water storage member is 1 to 2 mm.

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