JP6596327B2 - Evaporator with cool storage function - Google Patents

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.

  However, in a normal car air conditioner, when the engine is stopped, the compressor using the engine as a driving source stops, so that the refrigerant (medium for transporting cold heat) is not supplied to the evaporator, and the cooling capacity is rapidly reduced. There is a problem.

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

  As an evaporator with this type of cool storage function, the present applicant has previously provided a plurality of flat refrigerant flow pipes having a longitudinal direction in the up-down direction and a width direction in the ventilation direction, and a cool storage material enclosing portion. A heat storage core part having a cold storage material container and fins in which the cold storage material is enclosed in the material enclosure part, and in the heat exchange core part, a plurality of refrigerant flow pipes arranged at intervals in the ventilation direction are in the left-right direction By arranging a plurality of them at intervals, a gap is formed between the refrigerant flow pipes adjacent in the left-right direction, and the cold storage material container has the longitudinal direction directed in the vertical direction and the width direction directed in the ventilation direction. It is flat and is disposed so as to be in contact with the refrigerant flow pipe at a part of the whole gap and in the plurality of first gaps, and the fins are arranged in the refrigerant flow pipes in the remaining plurality of second gaps of the whole gap. In The heat storage core portion of the cool storage material container has a constant flow path length in the vertical direction and both upper and lower ends on the outer surfaces of the left and right side walls of the portion located within the range of the air exchange direction of the heat exchange core portion in the cool storage material enclosure Is formed, and a plurality of condensate drainage grooves are formed at intervals in the ventilation direction to allow condensate to flow downward from above and drain from the lower end opening, and each condensate drainage groove is filled with a regenerator material in a regenerator container The drainage groove is formed between two convex portions for drainage grooves that are provided on the both side walls of the section at intervals in the ventilation direction and bulge outward, and the bulging end is located on the same vertical plane. At least a part of the bulging end of the groove convex portion is in contact with the refrigerant flow pipe, and the lower end of at least one of the condensate drainage grooves among all the condensate drainage grooves opens downward, and the cold storage of the regenerator container The depth of all condensate drainage grooves formed on the outer surface of each side wall of the material enclosure Proposed equally going on the evaporator with a cool storage function over (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 is stopped and the compressor is stopped, the passenger compartment is used by using the cold energy stored in the evaporator. It is possible to cool the engine, and a rapid decrease in the cooling capacity when the engine is stopped is suppressed.

  Moreover, since the condensed water generated on the outer surface of the cool storage material container may freeze during the operation of the compressor, it is necessary to drain the condensed water. According to the evaporator with the cool storage function described in Patent Document 1, the cool storage When the condensed water generated on the outer surface of the material container accumulates in the condensed water drainage groove along the two drainage groove projections due to surface tension, if the amount of accumulated condensed water increases, Gravity acting on the water is greater than the surface tension, and it flows down in the condensate drainage channel at a stroke and drains, so the time that the condensate stays in the condensate drainage channel is shortened, and cold storage The condensed water generated on the outer surface of the material container can be drained smoothly.

  However, it is required to drain the condensed water generated on the outer surface of the cool storage material container more smoothly.

JP 2014-126307 A

  In view of the above circumstances, an object of the present invention is to provide an evaporator with a cold storage function capable of draining the condensed water generated on the outer surface of the cold storage material container more smoothly.

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

1) A plurality of flat refrigerant flow pipes having a longitudinal direction directed in the vertical direction and a width direction directed in the airflow direction, a regenerator material enclosing part, and a regenerator material container and fins in which the regenerator material is enclosed in the regenerator material enclosing part In the heat exchange core portion, a plurality of refrigerant flow pipes arranged at intervals in the ventilation direction are arranged at intervals in the left-right direction, so that A gap is formed between adjacent refrigerant flow pipes, and the cool storage material container has a flat shape in which the longitudinal direction is directed in the vertical direction and the width direction is directed in the ventilation direction, and in a part of the entire gap, The fins are arranged in contact with the refrigerant flow pipes in the plurality of first gaps, and the fins are arranged in contact with the refrigerant flow pipes in the remaining plurality of second gaps of the entire gap, and the cold storage material enclosure part of the cold storage material container Heat in On the outer surface of at least one of the left and right side walls of the portion located within the ventilation direction range of the replacement core portion, the upper and lower ends have a constant channel length in the vertical direction, and condensed water is supplied. A plurality of condensate drainage grooves that flow downward from above and drain from the lower end opening are formed at intervals in the ventilation direction, and each condensate drainage groove is formed in the ventilation direction on the side wall of the cool storage material enclosure of the cool storage material container. It is formed between two drainage groove convex portions that are spaced apart and bulge outward, and whose bulge ends are located on the same vertical plane. An evaporator with a cold storage function in which at least a part is in contact with the refrigerant flow pipe, and the lower end of at least one of the condensed water drain grooves is open downward,
An evaporator with a cold storage function in which a drainage promotion portion having a groove depth gradually becoming deeper toward the lower end of the condensed water drainage groove is provided at the lower part of the condensed water drainage groove whose lower end is opened downward.

  2) In the drainage promotion part, the bottom of the condensed water drainage groove is provided with an inclined part inclined toward the center in the thickness direction of the regenerator container toward the lower end of the condensed water drainage groove. Evaporator with cold storage function.

  3) The regenerator container is composed of two metal container constituent plates in which peripheral strips having a certain width are joined to each other, and the outer side of the container excluding the joined strips in both container constituent plates. A bulging portion is provided, and a bulging-type cold storage material enclosing portion is provided in the cool storage material container by an outward bulging portion of both container constituting plates, and at least one side wall of the cool storage material enclosing portion in both container constituting plates The lower end of the drainage promotion part at the bottom of the condensed water drainage groove having a lower end opened downward is the lower edge of the container component plate. The evaporator with a cold storage function according to the above 1) or 2), which is connected to the belt-like portion.

  4) The regenerator material enclosing portion of the regenerator container has an upper end opened upward, and a lower end opened to the first side of either the upwind side or the leeward side of the regenerator container in the ventilation direction. The first condensate drainage groove and the upper end open toward the other second side of the windward side and the leeward side of the cool storage material container, and the lower end of the first of the cool storage material container. A second condensate drainage groove that opens toward the side and a third condensate drainage groove that opens toward the second side in the ventilation direction of the cool storage material container and has a lower end that opens downward are formed. The evaporator with a cool storage function according to any one of 1) to 3), wherein the drainage promotion part is provided in a lower part of a third condensed water drainage groove.

  5) In the heat exchange core section, a plurality of pipe assemblies composed of two refrigerant flow pipes arranged at intervals in the ventilation direction are arranged at intervals in the left-right direction, so that adjacent pipe assemblies in the left-right direction are connected to each other. A cold storage container is disposed in the first gap so as to straddle the two refrigerant flow pipes of the pipe set, and fins are provided in the two refrigerant flow pipes of the pipe set in the second gap. The leeward lower header part is arranged below the refrigerant flow pipe arranged on the leeward side, and the leeward refrigerant flow pipe is connected to the leeward lower header part and arranged on the leeward side. The windward lower header portion is disposed below the refrigerant circulation pipe, and the windward refrigerant circulation pipe is communicated with the windward lower header portion, so that a drainage portion opened upward is formed between the lower header portions. With the cold storage function according to any one of 1) to 4) above Evaporator.

  According to the evaporator with a cold storage function of 1) to 5) above, the groove depth gradually becomes deeper toward the lower end of the condensate drainage groove at the lower part of the condensate drainage groove whose lower end opens downward. Since the drainage promotion part is provided, the condensed water generated on the outer surface of the cold storage material container and entering the condensed water drainage groove is less likely to stay in the drainage promotion part of the condensed water drainage groove due to the surface tension. Therefore, the condensed water generated on the outer surface of the cold storage material container and entering the condensed water drain groove can be drained more smoothly. In particular, in a state where the amount of condensed water generated is small, such as when the air volume is low, the drainage performance of the lower part of the cool storage material container is improved.

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 a right 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. The structure of the portion different in the ventilation direction of the lower part of the cool storage material container is shown with the inner fin omitted, the left half corresponds to the enlarged sectional view taken along the line B-B of FIG. 2, and the right half is CC of FIG. It is a figure equivalent to a line expanded sectional view.

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

  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) 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 both 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 FIGS. 2 and 3). . 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 (15A) (15B) 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).

  An aluminum regenerator container (16) in which a regenerator material is sealed in a part of the total gaps (15A) and (15B) in the heat exchange core (4) and in a plurality of first gaps (15A) It arrange | positions so that it may straddle the two refrigerant | coolant flow pipes (13) which comprise a group (14), and is brazed to both refrigerant | coolant flow pipes (13). Of the entire gap (15A) (15B) in the heat exchange core (4), the remaining plurality of second gaps (15B) are made of an aluminum brazing sheet having a brazing filler metal layer on both sides, and the wave crest extends in the ventilation direction. Corrugated outer fins (17) 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 two, second gaps (15B) between two first gaps (15A) adjacent in the left-right direction. The number of second gaps (15B) between two first gaps (15A) adjacent in the left-right direction may be 3 or more, and the upper limit is preferably 7. In addition, outer fins (17) are also arranged outside the pipe assemblies (14) at both 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 (18) are disposed outside the outer fins (17) at the left and right ends, and are brazed to the outer fins (17).

  The windward end of the outer fin (17) 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 (17) 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. 4). The width of the outer fin (17) in the ventilation direction is 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 to 5, the regenerator material container (16) is a flat, hollow shape having a substantially vertical rectangle in which the longitudinal direction is directed in the vertical direction and the width direction is directed in the ventilation direction, and the heat exchange core portion (4 ) Of the container body part (19) located within the full width of the ventilation direction and brazed to the two refrigerant flow pipes (13) of each pipe assembly (14), and the leeward of the container body part (19) It consists of a part of the side edge part, here, only the upper part, and an outward projecting part (21) provided so as to project to the leeward side from the leeward side end part of the outer fin (17). The outward projecting portion (21) is provided over a certain length from a portion slightly lowered from the upper end of the cold storage material container (16).

  The cold storage material container (16) is formed by pressing an aluminum brazing sheet having a brazing filler metal layer on both sides, and the peripheral strips (22a) (23a) having a certain width are brazed to each other. It is composed of two substantially vertical rectangular aluminum container constituting plates (22) and (23). The cool storage material container (16) has a hollow cool storage material enclosing portion (2) by extruding the portions excluding the strips (22a) and (23a) of the container constituting plates (22) and (23) outward ( 24) is formed from the container body part (19) to the outwardly projecting part (21), and the regenerator material is placed in the regenerator material enclosing part (24). The regenerator material enclosing part (24) is a first enclosing part (24a) existing in a part (a part below the chain line Y in FIG. 2) where only the container main body part (19) in the regenerator material container (16) is provided. ), And the portion of the cool storage material container (16) provided with the container body portion (19) and the outwardly projecting portion (21) (from the chain line Y in FIG. 2). A second enclosure portion (24b) existing across the container main body portion (19) and the outward projecting portion (21). The thickness of the part which exists in the container main-body part (19) in the 1st enclosure part (24a) and the 2nd enclosure part (24b) of the cool storage material enclosure part (24) is equal. In addition, there is a portion that is continuously above the second enclosure part (24b) and whose height in the vertical direction is considerably lower and whose width in the ventilation direction is narrower than that of the first enclosure part (24a).

  The windward edge of the cool storage material enclosure (24) of the cool storage material container (16) is vertical and both the top and bottom edges are horizontal, and the top and bottom of the windward edge of the cool storage material enclosure (24) Both ends and the windward end of the upper and lower edges are connected via an arcuate portion. In addition, the leeward side edge of the first enclosure (24a) of the cold storage enclosure (24) of the cold storage container (16) is vertical, and the lower end of the leeward edge of the first enclosure (24a) The leeward side end of the lower edge portion of the regenerator material enclosing portion (24) is connected via an arc-shaped portion.

  On the outer surfaces of the left and right side walls (25) of the portion of the cool storage material enclosure (24) of the cool storage material container (16) on the left and right side walls (25), the upper and lower ends have a fixed channel length in the vertical direction. A plurality of condensate drain grooves (26), (27), (28) for draining condensate from above to drain from the lower end opening are formed at intervals in the ventilation direction. At least the lower part of the condensate drainage groove (26), (27), (28), an inclined part that is inclined to the first side of the upwind side or the downwind side of the downwind direction, here the upwind side (26a) (27a) (28a) are provided. Each condensate drainage groove (26), (27), (28) is provided in a portion existing in the container body (19) in the left and right side walls (25) of the cool storage material enclosure (24) of the cool storage material container (16). Two drainage groove projections formed between two drainage groove protrusions (29) that are bulged outward and form one condensed water drainage groove (26) (27) (28) The length of at least one drain groove convex part (29) of the parts (29) is longer than the width of the container body part (19) of the cool storage material container (16) in the ventilation direction. The bulge heights of all the drain groove convex portions (29) of the left and right side walls (25) of each cold storage material container (16) are equal, and the bulge of the convex portion for the expansion portion (34) described later It is below the height, and the bulging ends of all the drain groove convex portions (29) are located on the same vertical plane. Further, at least a part of the bulging end of the drain groove convex portion (29) is connected to the two refrigerant flow pipes (13) constituting the left and right pipe assemblies (14) forming the first gap (15A). It is attached. Two adjacent condensate drains (26), (27) and (28) share the drain groove convex part (29) located between the condensate drains (26), (27) and (28). ing. Condensate drainage grooves (26), (27) and (28) on the left side wall (25) and convexity for drainage grooves (29), and condensate drainage grooves (26) (27) (28) and on the right side wall (25) The drain groove convex portion (29) is provided so as to be shifted in the ventilation direction in the same horizontal plane so as not to overlap with the whole. A small amount of air also flows in the condensed water drain grooves (26), (27), and (28).

  In the all-condensate drain (26), (27), (28), the upper end opens upward and the lower end is either one of the windward side and the leeward side of the cool storage material container (16). The first condensate drainage groove (26) opened to the windward side here, and the upper end of the other one of the windward side and the leeward side of the cool storage material container (16) in the ventilation direction 2nd condensate drainage groove (27), which opens toward the leeward side and here opens toward the leeward side of the regenerator container (16), and the leeward end of the regenerator container (16) at the upper end. There is a third condensate drainage groove (28) which opens toward the side and whose lower end opens downward.

  The first condensate drainage groove (26) has an upper end located at the upper edge of the cool storage material enclosure (24) and a lower end located at the windward edge of the cool storage material enclosure (24), and the upper end Are located slightly below the upper edge of the cool storage material enclosure (24) and the lower end is located at the windward edge of the cool storage material enclosure (24).

  The second condensate drainage groove (27) has an upper end located at the leeward side edge of the first enclosing portion (24a) of the regenerator material enclosing portion (24) and a lower end at the first end of the regenerator material enclosing portion (24). The one located on the leeward edge of the enclosure (24a) and the upper end on the upper extension line of the leeward edge of the first enclosure (24a) in the second enclosure (24b) of the regenerator enclosure (24) With the lower end located at the leeward edge of the first enclosing portion (24a) of the regenerator enclosing portion (24) and the leeward side edge of the first enclosing portion (24a) and the upper extension In some cases, the lower end of the first enclosing portion (24a) of the cool storage material enclosing portion (24) is located on the windward edge portion.

  The third condensate drainage groove (28) has an upper end located at the leeward edge of the first enclosure (24a) of the cool storage material enclosure (24) and a lower end at the lower edge of the cool storage enclosure (24) Located in the department.

  A drainage promotion part (31) whose groove depth gradually increases toward the lower end of the third condensed water drainage groove (28) is provided at the lower part of the third condensed water drainage groove (28). In the drainage promotion part (31), on the bottom surface of the third condensate drainage groove (28), an inclined part (32) inclined toward the central part (O) in the thickness direction of the cold storage container (16) toward the lower end Is provided. The inclined portion (32) is provided with the third condensate drainage groove (28) in the left and right side walls (25) of the portion of the cool storage material enclosure (24) of the cool storage material container (16) existing in the container body (19). It is formed by bending a portion between two drainage groove convex portions (29) to be formed toward the lower end toward the center (O) side in the thickness direction of the cold storage material container (16).

  In the container main body portion (19) of the cold storage material container (16), an offset aluminum inner fin (33) is disposed over substantially the entire vertical direction. The inner fin (33) has a plurality of corrugated strips arranged in the vertical direction and integrated with each other in the vertical direction, a wave crest extending in the vertical direction, a wave bottom extending in the vertical direction, and a connecting portion connecting the wave crest and the wave bottom. The wave crests and wave crests of two wavy strips that are adjacent to each other in the vertical direction are displaced in the ventilation direction.

  The outwardly projecting portion (21) of the cold storage material container (16) is provided over a certain length from a portion slightly below the upper end of the leeward side edge of the container body (19), and the outwardly projecting portion The vertical length of (21) is shorter than the vertical length of the container body (19). The vertical length of the outward projecting portion (21) is preferably 30% or less of the vertical length of the cold storage material container (16). The portion of the cool storage material enclosure (24) of the cool storage material container (24) that swells in the left and right side walls (25) and the outwardly projecting portion (21) swells in both the left and right directions, and the dimensions in the left and right direction are the cool storage material encapsulation portion. An inflatable portion (21a) having a dimension equal to or greater than the lateral dimension of (24) is provided, and the inflatable portion (21a) is outside in the ventilation direction from the downstream end of the outer fin (17) in the ventilation direction (ventilation direction). It is located on the downstream side. The expansion part (21a) includes an expansion part convex part (34) provided on the left and right side walls (25) of the cold storage material enclosing part (24) and bulging outward.

  A cool storage material injection member (35) is fixed to the upper end portion of the outwardly projecting portion (21) of the cool storage material container (16), and the cool storage material is passed through the cool storage material injection member (35) and the cool storage material enclosing portion (24 The cool storage material injection member (35) is sealed after the cool storage material is injected into the heat storage material enclosure (24).

  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 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 (15B), 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 (19) on the left and right side walls (25) of the cold storage material enclosure (24) of the cold storage container (16). It is transmitted directly to the cold storage material in the cool storage material container (16) 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 (25) through the parts that are not brazed to the refrigerant flow pipe (13) and the inner fins (33), it is transmitted to the whole of the cold storage material in the cold storage material container (16) and cold heat is stored in the cold storage material. It is done.

  Further, when the compressor is operated, condensed water is generated on the surface of the regenerator container (16), and the condensed water enters the first to third condensed water drain grooves (26), (27), (28), and the surface tension. The first to third condensed water drain grooves (26), (27) along the drain groove convex portions (29) on both sides of the first to third condensed water drain grooves (26), (27), (28). Accumulate in (28). As the amount of accumulated condensate increases, the gravitational force acting on the accumulated condensate becomes greater than the surface tension, and flows down in the first to third condensate drains (26), (27) and (28). Drained. At this time, particularly in the third condensed water drainage groove (28), the condensed water is effectively prevented from staying in the drainage promotion portion (31) of the condensed water drainage groove due to surface tension. Therefore, the condensed water generated on the outer surface of the cold storage material container (16) and entering the first to third condensed water drain grooves (26), (27), (28) can be drained more smoothly.

   When the compressor is stopped, the cold energy stored in the regenerator material in the regenerator material container (16) is transferred to the container body (19) on the left and right side walls (25) of the regenerator material enclosing part (24) of the regenerator material container (16). ) Is directly transferred 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 pipe, and the refrigerant flows from the inner fin (33) to the left and right side walls (25). 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 (17) brazed on the opposite side of the cold storage container (16) in the pipe (13). The cold heat transmitted to the outer fin (17) is transmitted to the air passing through the second gap (15B) adjacent to the first gap (15A) where the cool storage material container (16) is disposed. The cold heat transmitted to the outer fin (17) is transmitted to the air passing through the second gap (15B) adjacent to the first gap (15A) where the cool storage material container (16) 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 embodiment described above, the condensate drainage groove (26) (26) (on the outer surfaces of the left and right side walls (25) of the portion of the cool storage material enclosure (24) of the cool storage material container (16) existing in the container body (19). 27) (28) and the drain groove convex portion (29) are provided, but are not limited to this, and the condensate drain grooves (26) (27) (28) and A drain groove convex portion (29) may be provided.

  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
(9): Downward lower header
(11): Upwind lower header
(12): Drainage section
(13): Refrigerant distribution pipe
(14): Tube assembly
(15A) (15B): Gap
(16): Cold storage container
(17): Outer fin
(19): Container body
(21): Outward projecting part
(22) (23): Container component plate
(22a) (23a): Strip
(24): Cooling material enclosure
(25): Side wall
(26): 1st condensate drain
(27): Second condensate drain
(28): Third condensate drain
(29): Convex part for drainage
(31): Drainage Promotion Department
(32): Inclined part

Claims (5)

A plurality of flat refrigerant flow pipes having a longitudinal direction in the vertical direction and a width direction in a ventilation direction, a cold storage material enclosure, and a cold storage material container and a fin in which the cold storage material is enclosed in the cold storage material enclosure A heat exchange core part is provided, and in the heat exchange core part, a plurality of refrigerant flow pipes arranged at intervals in the ventilation direction are arranged at intervals in the left-right direction, so that they are adjacent in the left-right direction. A gap is formed between the refrigerant flow pipes, and the cool storage material container has a flat shape in which the longitudinal direction is directed in the vertical direction and the width direction is directed in the ventilation direction, and a part of the total gap and a plurality The fins are arranged in contact with the refrigerant flow pipe in the first gap and the fins are arranged in contact with the refrigerant flow pipe in the remaining plurality of second gaps of the entire gap, and heat in the cold storage material enclosure portion of the cold storage material container Exchange On the outer surface of at least one of the left and right side walls of the part located within the range of the ventilation direction of the core part, the upper and lower ends are open and the condensate water is opened at the upper and lower ends with a certain channel length in the vertical direction. A plurality of condensate drainage grooves that flow downward from the lower end opening and drain from the lower end opening are formed at intervals in the ventilation direction, and each condensate drainage groove is spaced in the ventilation direction on the side wall of the cool storage material enclosure of the cool storage material container At least one of the bulging ends of all the drainage groove convex portions, which are formed between the two drainage groove convex portions provided on the same vertical plane. An evaporator with a cold storage function, a part of which is in contact with the refrigerant flow pipe, and a lower end of at least one of the condensed water drain grooves is open downward,
An evaporator with a cold storage function in which a drainage promotion portion having a groove depth gradually becoming deeper toward the lower end of the condensed water drainage groove is provided at the lower part of the condensed water drainage groove whose lower end is opened downward. 2. The cold storage according to claim 1, wherein in the drainage promotion portion, an inclined portion is provided on a bottom surface of the condensed water drainage groove, which is inclined toward a central portion in a thickness direction of the cold storage material container toward a lower end of the condensed water drainage groove. Evaporator with function. The cold storage material container is composed of two metal container constituent plates in which peripheral strips having a certain width are joined to each other, and bulges outward in a portion excluding the joined strips in both container constituent plates. And a bulging cold storage material enclosing portion is provided in the cold storage material container by the outward bulging portions of both container component plates, and serves as a side wall of at least one of the cold storage material enclosure portions in both container component plates Condensate drainage groove and drainage groove convex portion are provided in the part, and the lower end of the drainage promotion part at the bottom of the condensed water drainage groove whose lower end is opened downward is a band-like shape of the lower edge of the container component plate The evaporator with a cool storage function according to claim 1 or 2, wherein the evaporator is connected to the section. A first condensate having an upper end that opens upward in the cool storage material enclosure of the cool storage material container and a lower end that opens on the first side of either the windward side or the leeward side of the cool storage material container. The water drainage groove and the upper end open toward the other second side of the windward side and the leeward side of the cool storage material container, and the lower end is on the first side of the cool storage material container in the ventilation direction A second condensate drainage groove that opens toward the top, and a third condensate drainage groove that opens toward the second side in the ventilation direction of the cool storage material container and that opens downward at the bottom end. And the evaporator with a cool storage function in any one of Claims 1-3 in which the said drainage promotion part is provided in the lower part of the 3rd condensed water drainage groove. In the heat exchange core part, a plurality of pipe sets each including two refrigerant flow pipes arranged at intervals in the ventilation direction are arranged at intervals in the left-right direction, so that the pipe sets adjacent to each other in the left-right direction are arranged. A cold storage container is disposed in the first gap so as to straddle the two refrigerant flow pipes of the pipe set, and the fin extends in the second gap of the two refrigerant flow pipes of the pipe set. The leeward lower header portion is disposed below the refrigerant flow pipe disposed on the leeward side, and the leeward refrigerant flow pipe is communicated with the leeward lower header portion and disposed on the windward side. A windward lower header portion is disposed below the refrigerant flow tube, and the windward refrigerant flow tube is communicated with the windward lower header portion, and a drainage portion opened upward is formed between the lower header portions. The cold storage function according to any one of claims 1 to 4 Come evaporator.

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